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headscale/hscontrol/policy/v2/tailscale_routes_compat_test.go

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policy/v2: add subnet routes and exit node compatibility tests Add comprehensive test file for validating Headscale's ACL engine behavior for subnet routes and exit nodes against documented Tailscale SaaS behavior. Tests cover: - Category A: Subnet route basics (wildcard includes routes, tag-based ACL excludes routes) - Category B: Exit node behavior (exit routes not in SrcIPs) - Category F: Filter placement rules (filters on destination nodes) - Category G: Protocol and port restrictions - Category R: Route coverage rules - Category O: Overlapping routes - Category H: Edge cases (wildcard formats, CGNAT handling) - Category T: Tag resolution (tags resolve to node IPs only) - Category I: IPv6 specific behavior The tests document expected Tailscale SaaS behavior with TODOs marking areas where Headscale currently differs. This provides a baseline for compatibility improvements.
2026-01-28 12:04:52 +00:00
package v2
// This file contains compatibility tests for subnet routes and exit nodes.
// It validates Headscale's ACL engine behavior against documented Tailscale
// SaaS behavior. Tests document behavioral differences with TODO comments.
//
// Source findings: /home/kradalby/acl-explore/findings/{10,11,12,13,14,15}-*.md
import (
"net/netip"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/juanfont/headscale/hscontrol/policy/policyutil"
"github.com/juanfont/headscale/hscontrol/types"
"github.com/stretchr/testify/require"
"gorm.io/gorm"
"tailscale.com/net/tsaddr"
"tailscale.com/tailcfg"
)
// wildcardSrcIPs represents the SrcIPs used when wildcard (*) source is specified.
// In Tailscale, this includes the CGNAT range and IPv6 Tailscale range, plus any
// advertised subnet routes.
var wildcardSrcIPs = []string{
"100.64.0.0/10", // CGNAT range for Tailscale IPs
"fd7a:115c:a1e0::/48", // Tailscale IPv6 range
}
// memberSrcIPs represents the SrcIPs for autogroup:member (user-owned nodes).
// This includes client1, client2, and user1.
var memberSrcIPs = []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
}
// wildcardDstPorts represents wildcard destination ports using {IP: "*"}.
var wildcardDstPorts = []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
}
// setupRouteCompatUsers returns the test users for route compatibility tests.
func setupRouteCompatUsers() types.Users {
return types.Users{
{Model: gorm.Model{ID: 1}, Name: "kratail2tid"},
}
}
// setupRouteCompatNodes returns the test nodes for route compatibility tests.
// The node configuration includes:
// - 2 client nodes (user-owned, no routes)
// - 1 subnet router (tag:router, 10.33.0.0/16)
// - 1 exit node (tag:exit, 0.0.0.0/0, ::/0)
// - 1 multi-router (tag:router + tag:exit, 172.16.0.0/24 + exit routes)
// - 2 HA routers (tag:ha, both advertise 192.168.1.0/24)
// - 1 big router (tag:router, 10.0.0.0/8)
// - 1 user-owned node (user1).
func setupRouteCompatNodes(users types.Users) types.Nodes {
// Node: client1 - User-owned client (no routes)
nodeClient1 := &types.Node{
ID: 1,
GivenName: "client1",
User: &users[0],
UserID: &users[0].ID,
IPv4: ptrAddr("100.116.73.38"),
IPv6: ptrAddr("fd7a:115c:a1e0::a801:4949"),
Hostinfo: &tailcfg.Hostinfo{},
ApprovedRoutes: []netip.Prefix{},
}
// Node: client2 - User-owned client (no routes)
nodeClient2 := &types.Node{
ID: 2,
GivenName: "client2",
User: &users[0],
UserID: &users[0].ID,
IPv4: ptrAddr("100.89.42.23"),
IPv6: ptrAddr("fd7a:115c:a1e0::d01:2a2e"),
Hostinfo: &tailcfg.Hostinfo{},
ApprovedRoutes: []netip.Prefix{},
}
// Node: subnet-router - Tagged with tag:router, advertises 10.33.0.0/16
nodeSubnetRouter := &types.Node{
ID: 3,
GivenName: "subnet-router",
IPv4: ptrAddr("100.119.139.79"),
IPv6: ptrAddr("fd7a:115c:a1e0::4001:8ba0"),
Tags: []string{"tag:router"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: []netip.Prefix{
netip.MustParsePrefix("10.33.0.0/16"),
},
},
ApprovedRoutes: []netip.Prefix{
netip.MustParsePrefix("10.33.0.0/16"),
},
}
// Node: exit-node - Tagged with tag:exit, advertises exit routes
nodeExitNode := &types.Node{
ID: 4,
GivenName: "exit-node",
IPv4: ptrAddr("100.121.32.1"),
IPv6: ptrAddr("fd7a:115c:a1e0::7f01:2004"),
Tags: []string{"tag:exit"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: tsaddr.ExitRoutes(),
},
ApprovedRoutes: tsaddr.ExitRoutes(),
}
// Node: multi-router - Tagged with tag:router AND tag:exit
// Advertises both subnet (172.16.0.0/24) and exit routes
multiRouterRoutes := append([]netip.Prefix{
netip.MustParsePrefix("172.16.0.0/24"),
}, tsaddr.ExitRoutes()...)
nodeMultiRouter := &types.Node{
ID: 5,
GivenName: "multi-router",
IPv4: ptrAddr("100.74.117.7"),
IPv6: ptrAddr("fd7a:115c:a1e0::c401:7508"),
Tags: []string{"tag:router", "tag:exit"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: multiRouterRoutes,
},
ApprovedRoutes: multiRouterRoutes,
}
// Node: ha-router1 - Tagged with tag:ha, advertises 192.168.1.0/24
nodeHARouter1 := &types.Node{
ID: 6,
GivenName: "ha-router1",
IPv4: ptrAddr("100.85.37.108"),
IPv6: ptrAddr("fd7a:115c:a1e0::f101:2597"),
Tags: []string{"tag:ha"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: []netip.Prefix{
netip.MustParsePrefix("192.168.1.0/24"),
},
},
ApprovedRoutes: []netip.Prefix{
netip.MustParsePrefix("192.168.1.0/24"),
},
}
// Node: ha-router2 - Tagged with tag:ha, advertises same 192.168.1.0/24
nodeHARouter2 := &types.Node{
ID: 7,
GivenName: "ha-router2",
IPv4: ptrAddr("100.119.130.32"),
IPv6: ptrAddr("fd7a:115c:a1e0::4501:82a9"),
Tags: []string{"tag:ha"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: []netip.Prefix{
netip.MustParsePrefix("192.168.1.0/24"),
},
},
ApprovedRoutes: []netip.Prefix{
netip.MustParsePrefix("192.168.1.0/24"),
},
}
// Node: big-router - Tagged with tag:router, advertises 10.0.0.0/8
nodeBigRouter := &types.Node{
ID: 8,
GivenName: "big-router",
IPv4: ptrAddr("100.100.100.1"),
IPv6: ptrAddr("fd7a:115c:a1e0::6401:6401"),
Tags: []string{"tag:router"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: []netip.Prefix{
netip.MustParsePrefix("10.0.0.0/8"),
},
},
ApprovedRoutes: []netip.Prefix{
netip.MustParsePrefix("10.0.0.0/8"),
},
}
// Node: user1 - User-owned node (no routes)
nodeUser1 := &types.Node{
ID: 9,
GivenName: "user1",
User: &users[0],
UserID: &users[0].ID,
IPv4: ptrAddr("100.90.199.68"),
IPv6: ptrAddr("fd7a:115c:a1e0::2d01:c747"),
Hostinfo: &tailcfg.Hostinfo{},
ApprovedRoutes: []netip.Prefix{},
}
return types.Nodes{
nodeClient1,
nodeClient2,
nodeSubnetRouter,
nodeExitNode,
nodeMultiRouter,
nodeHARouter1,
nodeHARouter2,
nodeBigRouter,
nodeUser1,
}
}
// routesPolicyPrefix provides the standard groups, tagOwners, and hosts
// for route compatibility tests.
const routesPolicyPrefix = `{
"groups": {
"group:admins": ["kratail2tid@"],
"group:empty": []
},
"tagOwners": {
"tag:router": ["kratail2tid@"],
"tag:exit": ["kratail2tid@"],
"tag:ha": ["kratail2tid@"]
},
"hosts": {
"internal": "10.0.0.0/8",
"subnet24": "192.168.1.0/24"
},
"acls": [`
const routesPolicySuffix = `
]
}`
// makeRoutesPolicy creates a full policy from just the ACL rules portion.
func makeRoutesPolicy(aclRules string) string {
return routesPolicyPrefix + aclRules + routesPolicySuffix
}
// routesCompatTest defines a test case for routes compatibility testing.
type routesCompatTest struct {
name string // Test name
policy string // HuJSON policy as multiline raw string
wantFilters map[string][]tailcfg.FilterRule // node GivenName -> expected filters
}
// TestTailscaleRoutesCompatSubnetBasics tests basic subnet route behavior (Category A).
// These tests verify that subnet routes are correctly included in SrcIPs for wildcard rules,
// that tag-based ACLs resolve to node IPs (not routes), and that explicit subnet filters
// are placed on the correct destination nodes.
func TestTailscaleRoutesCompatSubnetBasics(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// A1: Wildcard ACL includes subnet routes in SrcIPs
{
name: "A1_wildcard_acl_includes_routes_in_srcips",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
// When using * -> *:*, SrcIPs should include advertised subnet routes
// (but NOT exit routes 0.0.0.0/0, ::/0).
// TODO: Verify Tailscale includes subnet routes 10.33.0.0/16, 172.16.0.0/24,
// 192.168.1.0/24, 10.0.0.0/8 in SrcIPs but NOT 0.0.0.0/0, ::/0
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
// TODO: Tailscale also includes these subnet routes:
// "10.0.0.0/8",
// "10.33.0.0/16",
// "172.16.0.0/24",
// "192.168.1.0/24",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix DstPorts expansion and exit node coverage for tag-based ACLs
//
// A2: Tag-based ACL resolves to node IPs only, NOT routes
//
// TAILSCALE BEHAVIOR:
// - tag:router includes: subnet-router, multi-router, big-router
// - Each tag:router node receives filter with ALL tag:router IPs in DstPorts
// - exit-node (tag:exit only) does NOT receive any filter
// - DstPorts contains ONLY node IPs, NOT advertised routes
//
// HEADSCALE BEHAVIOR:
// - INCORRECT: Each node only gets ITS OWN IPs in DstPorts (should be ALL tag IPs)
// - INCORRECT: exit-node receives a filter because multi-router has exit routes
// and Headscale treats 0.0.0.0/0 as covering node IPs for filter distribution
//
// ROOT CAUSE:
// 1. Filter compilation only adds destinations for the current node being filtered,
// not all nodes matching the tag
// 2. Exit routes (0.0.0.0/0, ::/0) are treated as covering all destinations
//
// FIX REQUIRED:
// 1. When dst is a tag, include ALL IPs of nodes with that tag in DstPorts
// 2. Exclude exit routes from filter coverage calculations
{
name: "A2_tag_based_acl_excludes_routes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:router"], "dst": ["tag:router:*"]}
`),
// EXPECTED (Tailscale) - commented out:
// wantFilters: map[string][]tailcfg.FilterRule{
// "client1": nil,
// "client2": nil,
// "exit-node": nil, // tag:exit only, not tag:router
// "ha-router1": nil,
// "ha-router2": nil,
// "user1": nil,
// "subnet-router": {
// {
// SrcIPs: []string{
// "100.100.100.1/32", "100.119.139.79/32", "100.74.117.7/32",
// "fd7a:115c:a1e0::4001:8ba0/128", "fd7a:115c:a1e0::6401:6401/128",
// "fd7a:115c:a1e0::c401:7508/128",
// },
// DstPorts: []tailcfg.NetPortRange{
// // ALL tag:router IPs, not just this node's IP
// {IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
// {IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
// {IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
// {IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
// {IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
// {IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
// },
// IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
// },
// },
// // Same for multi-router and big-router...
// },
//
// ACTUAL (Headscale) - current behavior:
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
// INCORRECT: subnet-router only gets its OWN IPs in DstPorts
// Tailscale includes ALL tag:router IPs
"subnet-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
// INCORRECT: Only this node's IPs, should be ALL tag:router IPs
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// multi-router has BOTH tag:router AND tag:exit
// Because of exit routes, filter merging includes all tag:router destinations
// This is actually the CORRECT Tailscale behavior for DstPorts (but wrong filter distribution)
"multi-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
// All tag:router IPs due to exit route coverage + filter merging
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: big-router only gets its OWN IPs in DstPorts
// Tailscale includes ALL tag:router IPs
"big-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
// INCORRECT: Only this node's IPs, should be ALL tag:router IPs
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: exit-node receives filter due to multi-router having exit routes
// and Headscale treating 0.0.0.0/0 as covering node IPs
// Tailscale would return nil here
"exit-node": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// A3: Explicit subnet destination - filter goes to router only
//
// TAILSCALE BEHAVIOR:
// - Filter placed ONLY on nodes whose routes cover the destination
// - subnet-router (10.33.0.0/16) gets filter - exact match
// - big-router (10.0.0.0/8) gets filter - parent covers child
// - exit-node and multi-router get NO filter - exit routes (0.0.0.0/0)
// do NOT count as "covering" subnet destinations for filter placement
//
// HEADSCALE BEHAVIOR:
// - Exit nodes (0.0.0.0/0) ARE treated as covering all destinations
// - exit-node and multi-router incorrectly receive the filter
//
// ROOT CAUSE:
// hscontrol/policy/v2/filter.go treats exit routes (0.0.0.0/0, ::/0) as
// covering all destinations, but Tailscale only uses exit routes for
// actual traffic routing, not for filter distribution.
//
// FIX REQUIRED:
// When determining which nodes receive a filter based on route coverage,
// exclude exit routes (0.0.0.0/0 and ::/0) from the coverage check.
// Exit nodes should only receive filters when explicitly targeted.
{
name: "A3_explicit_subnet_filter_to_router",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:*"]}
`),
// EXPECTED (Tailscale) - commented out:
// wantFilters: map[string][]tailcfg.FilterRule{
// "client1": nil,
// "client2": nil,
// "exit-node": nil, // Exit route does NOT cover for filter placement
// "ha-router1": nil,
// "ha-router2": nil,
// "user1": nil,
// "multi-router": nil, // Exit route does NOT cover for filter placement
// "subnet-router": {
// {
// SrcIPs: []string{"100.64.0.0/10", "fd7a:115c:a1e0::/48"},
// DstPorts: []tailcfg.NetPortRange{{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny}},
// IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
// },
// },
// "big-router": {
// {
// SrcIPs: []string{"100.64.0.0/10", "fd7a:115c:a1e0::/48"},
// DstPorts: []tailcfg.NetPortRange{{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny}},
// IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
// },
// },
// },
//
// ACTUAL (Headscale) - current behavior:
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
// subnet-router owns 10.33.0.0/16 - exact match (CORRECT)
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// big-router owns 10.0.0.0/8 which covers 10.33.0.0/16 (CORRECT)
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: exit-node gets filter because 0.0.0.0/0 "covers" destination
// Tailscale would return nil here
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: multi-router gets filter because 0.0.0.0/0 "covers" destination
// Tailscale would return nil here
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// A3b: autogroup:member to subnet - SrcIPs = member IPs only
//
// TAILSCALE BEHAVIOR:
// - autogroup:member = user-owned nodes only (client1, client2, user1)
// - Filter goes to subnet-router (exact match) and big-router (parent route)
// - exit-node and multi-router get NO filter (exit routes don't cover)
//
// HEADSCALE BEHAVIOR:
// - exit-node and multi-router incorrectly receive filters because
// exit routes (0.0.0.0/0) are treated as covering all destinations
//
// ROOT CAUSE:
// Same as A3 - exit routes should not count for filter distribution
//
// FIX REQUIRED:
// Exclude exit routes (0.0.0.0/0 and ::/0) from coverage checks
{
name: "A3b_autogroup_member_to_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.33.0.0/16:*"]}
`),
// EXPECTED (Tailscale) - commented out:
// wantFilters: map[string][]tailcfg.FilterRule{
// "client1": nil,
// "client2": nil,
// "exit-node": nil, // Exit route does NOT cover
// "ha-router1": nil,
// "ha-router2": nil,
// "user1": nil,
// "multi-router": nil, // Exit route does NOT cover
// "subnet-router": { ... }, // Exact match
// "big-router": { ... }, // Parent route covers
// },
//
// ACTUAL (Headscale) - current behavior:
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
// CORRECT: subnet-router gets filter (exact match)
"subnet-router": {
{
SrcIPs: []string{
"100.89.42.23/32", // client2
"100.90.199.68/32", // user1
"100.116.73.38/32", // client1
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// CORRECT: big-router gets filter (parent route 10.0.0.0/8 covers)
"big-router": {
{
SrcIPs: []string{
"100.89.42.23/32",
"100.90.199.68/32",
"100.116.73.38/32",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: exit-node receives filter due to 0.0.0.0/0 coverage
// Tailscale would return nil here
"exit-node": {
{
SrcIPs: []string{
"100.89.42.23/32",
"100.90.199.68/32",
"100.116.73.38/32",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: multi-router receives filter due to 0.0.0.0/0 coverage
// Tailscale would return nil here
"multi-router": {
{
SrcIPs: []string{
"100.89.42.23/32",
"100.90.199.68/32",
"100.116.73.38/32",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// A4: Multiple routes on same router (172.16.0.0/24 destination)
//
// TAILSCALE BEHAVIOR:
// - multi-router has 172.16.0.0/24, should get filter (exact match)
// - exit-node has 0.0.0.0/0 but does NOT cover 172.16.0.0/24 for filter placement
//
// HEADSCALE BEHAVIOR:
// - multi-router correctly gets filter
// - exit-node incorrectly gets filter because 0.0.0.0/0 is treated as covering
//
// ROOT CAUSE:
// Same as A3 - exit routes should not count for filter distribution
//
// FIX REQUIRED:
// Exclude exit routes from coverage checks
{
name: "A4_multiple_routes_same_router",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["172.16.0.0/24:*"]}
`),
// EXPECTED (Tailscale) - commented out:
// wantFilters: map[string][]tailcfg.FilterRule{
// "client1": nil,
// "client2": nil,
// "subnet-router": nil,
// "exit-node": nil, // 0.0.0.0/0 does NOT cover for filter placement
// "ha-router1": nil,
// "ha-router2": nil,
// "big-router": nil,
// "user1": nil,
// "multi-router": { ... }, // Exact match
// },
//
// ACTUAL (Headscale) - current behavior:
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
// CORRECT: multi-router gets filter (exact match for 172.16.0.0/24)
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "172.16.0.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: exit-node receives filter due to 0.0.0.0/0 coverage
// Tailscale would return nil here
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "172.16.0.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// A5: Host alias to subnet (uses "internal" = "10.0.0.0/8")
//
// TAILSCALE BEHAVIOR:
// - "internal" resolves to 10.0.0.0/8 via hosts alias
// - big-router (10.0.0.0/8) gets filter - exact match
// - subnet-router (10.33.0.0/16) gets filter - child route
// - exit-node and multi-router get NO filter (exit routes don't cover)
//
// HEADSCALE BEHAVIOR:
// - big-router and subnet-router correctly get filters
// - exit-node and multi-router incorrectly get filters (exit route coverage)
//
// ROOT CAUSE:
// Same as A3 - exit routes should not count for filter distribution
//
// FIX REQUIRED:
// Exclude exit routes from coverage checks
{
name: "A5_host_alias_to_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["internal:22"]}
`),
// EXPECTED (Tailscale) - commented out:
// wantFilters: map[string][]tailcfg.FilterRule{
// "client1": nil,
// "client2": nil,
// "exit-node": nil, // Exit route does NOT cover
// "ha-router1": nil,
// "ha-router2": nil,
// "user1": nil,
// "multi-router": nil, // Exit route does NOT cover
// "subnet-router": { ... }, // Child route
// "big-router": { ... }, // Exact match
// },
//
// ACTUAL (Headscale) - current behavior:
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
// CORRECT: subnet-router gets filter (child route 10.33.0.0/16 within 10.0.0.0/8)
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// CORRECT: big-router gets filter (exact match for 10.0.0.0/8)
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: exit-node receives filter due to 0.0.0.0/0 coverage
// Tailscale would return nil here
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: multi-router receives filter due to 0.0.0.0/0 coverage
// Tailscale would return nil here
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
pol, err := unmarshalPolicy([]byte(tt.policy))
require.NoError(t, err, "failed to parse policy")
err = pol.validate()
require.NoError(t, err, "policy validation failed")
for nodeName, wantFilters := range tt.wantFilters {
node := findNodeByGivenName(nodes, nodeName)
require.NotNil(t, node, "node %s not found", nodeName)
compiledFilters, err := pol.compileFilterRulesForNode(users, node.View(), nodes.ViewSlice())
require.NoError(t, err, "failed to compile filters for node %s", nodeName)
gotFilters := policyutil.ReduceFilterRules(node.View(), compiledFilters)
if len(wantFilters) == 0 && len(gotFilters) == 0 {
continue
}
if diff := cmp.Diff(wantFilters, gotFilters, cmpOptions()...); diff != "" {
t.Errorf("node %s filters mismatch (-want +got):\n%s", nodeName, diff)
}
}
})
}
}
// TestTailscaleRoutesCompatExitNodes tests exit node behavior (Category B).
// These tests verify that exit routes (0.0.0.0/0, ::/0) are NOT included in SrcIPs,
// that exit nodes can cover external destinations, and autogroup:internet behavior.
func TestTailscaleRoutesCompatExitNodes(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
// Standard wildcard filter that all nodes receive for * -> *:* ACL
wildcardFilter := []tailcfg.FilterRule{
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
}
tests := []routesCompatTest{
// TODO: Verify Tailscale includes subnet routes in SrcIPs for wildcard ACLs
//
// B1: Exit routes NOT in SrcIPs with wildcard ACL
//
// TAILSCALE BEHAVIOR:
// - SrcIPs includes CGNAT + IPv6 Tailscale ranges
// - SrcIPs also includes advertised subnet routes (10.0.0.0/8, etc.)
// - Exit routes (0.0.0.0/0, ::/0) are NOT included in SrcIPs
//
// HEADSCALE BEHAVIOR:
// - SrcIPs only includes CGNAT + IPv6 Tailscale ranges
// - Subnet routes are NOT included in SrcIPs (might be a difference)
// - Exit routes correctly NOT included
//
// ROOT CAUSE:
// Headscale doesn't expand wildcard source to include subnet routes
//
// FIX REQUIRED (if needed):
// Add subnet routes to SrcIPs when source is wildcard
{
name: "B1_exit_routes_not_in_srcips",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
// All nodes receive the same wildcard filter
// Key verification: exit routes NOT in SrcIPs (they're not - correct!)
wantFilters: map[string][]tailcfg.FilterRule{
"exit-node": wildcardFilter,
"client1": wildcardFilter,
"client2": wildcardFilter,
"multi-router": wildcardFilter,
"subnet-router": wildcardFilter,
"ha-router1": wildcardFilter,
"ha-router2": wildcardFilter,
"big-router": wildcardFilter,
"user1": wildcardFilter,
},
},
// B2: tag:exit excludes exit routes from DstPorts
{
name: "B2_tag_exit_excludes_exit_routes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:exit"], "dst": ["tag:exit:*"]}
`),
// tag:exit includes: exit-node, multi-router
// DstPorts should contain ONLY their node IPs, NOT exit routes
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
"exit-node": {
{
SrcIPs: []string{
"100.121.32.1/32", // exit-node IPv4
"100.74.117.7/32", // multi-router IPv4
"fd7a:115c:a1e0::7f01:2004/128", // exit-node IPv6
"fd7a:115c:a1e0::c401:7508/128", // multi-router IPv6
},
DstPorts: []tailcfg.NetPortRange{
// Node IPs only, NOT exit routes (0.0.0.0/0, ::/0)
{IP: "100.121.32.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::7f01:2004/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.121.32.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::7f01:2004/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Verify Tailscale includes subnet routes in SrcIPs
//
// B4: Multi-router has both subnet and exit routes
//
// TAILSCALE BEHAVIOR:
// - multi-router has 172.16.0.0/24 (subnet) + 0.0.0.0/0,::/0 (exit)
// - SrcIPs may include 172.16.0.0/24 but NOT 0.0.0.0/0 or ::/0
// - Only multi-router node may receive the filter (needs verification)
//
// HEADSCALE BEHAVIOR:
// - All nodes receive the same wildcard filter
// - SrcIPs is just CGNAT + IPv6 range, no subnet routes
//
// ROOT CAUSE:
// Headscale distributes wildcard filters to all nodes
{
name: "B4_multi_router_has_both_route_types",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
// EXPECTED (Tailscale) - commented out:
// wantFilters: map[string][]tailcfg.FilterRule{
// "multi-router": {
// {
// SrcIPs: []string{
// "100.64.0.0/10",
// "fd7a:115c:a1e0::/48",
// // Tailscale may include 172.16.0.0/24 here
// // but definitely NOT 0.0.0.0/0 or ::/0
// },
// DstPorts: []tailcfg.NetPortRange{
// {IP: "100.64.0.0/10", Ports: tailcfg.PortRangeAny},
// {IP: "fd7a:115c:a1e0::/48", Ports: tailcfg.PortRangeAny},
// },
// IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
// },
// },
// "client1": nil,
// "client2": nil,
// "subnet-router": nil,
// "exit-node": nil,
// "ha-router1": nil,
// "ha-router2": nil,
// "big-router": nil,
// "user1": nil,
// },
//
// ACTUAL (Headscale) - all nodes get wildcard filter:
wantFilters: map[string][]tailcfg.FilterRule{
"multi-router": wildcardFilter,
"client1": wildcardFilter,
"client2": wildcardFilter,
"subnet-router": wildcardFilter,
"exit-node": wildcardFilter,
"ha-router1": wildcardFilter,
"ha-router2": wildcardFilter,
"big-router": wildcardFilter,
"user1": wildcardFilter,
},
},
// B8: autogroup:internet generates no filters
//
policy: autogroup:internet does not generate packet filters According to Tailscale SaaS behavior, autogroup:internet is handled by exit node routing via AllowedIPs, not by packet filtering. ACL rules with autogroup:internet as destination should produce no filter rules for any node. Previously, Headscale expanded autogroup:internet to public CIDR ranges and distributed filters to exit nodes (because 0.0.0.0/0 "covers" internet destinations). This was incorrect. Add detection for AutoGroupInternet in filter compilation to skip filter generation for this autogroup. Update test expectations accordingly.
2026-01-28 13:08:38 +00:00
// autogroup:internet is handled by exit node routing via AllowedIPs,
// not by packet filtering. ALL nodes should get null/empty filters.
policy/v2: add subnet routes and exit node compatibility tests Add comprehensive test file for validating Headscale's ACL engine behavior for subnet routes and exit nodes against documented Tailscale SaaS behavior. Tests cover: - Category A: Subnet route basics (wildcard includes routes, tag-based ACL excludes routes) - Category B: Exit node behavior (exit routes not in SrcIPs) - Category F: Filter placement rules (filters on destination nodes) - Category G: Protocol and port restrictions - Category R: Route coverage rules - Category O: Overlapping routes - Category H: Edge cases (wildcard formats, CGNAT handling) - Category T: Tag resolution (tags resolve to node IPs only) - Category I: IPv6 specific behavior The tests document expected Tailscale SaaS behavior with TODOs marking areas where Headscale currently differs. This provides a baseline for compatibility improvements.
2026-01-28 12:04:52 +00:00
{
name: "B8_autogroup_internet_no_filters",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["autogroup:internet:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
},
},
// B3: Exit node advertises exit routes (verify RoutableIPs)
//
// This test verifies that exit-node has 0.0.0.0/0 and ::/0 in RoutableIPs.
policy: fix wildcard DstPorts format and proto:icmp handling Fix two compatibility issues discovered in Tailscale SaaS testing: 1. Wildcard DstPorts format: Headscale was expanding wildcard destinations to CGNAT ranges (100.64.0.0/10, fd7a:115c:a1e0::/48) while Tailscale uses {IP: "*"} directly. Add detection for wildcard (Asterix) alias type in filter compilation to use the correct format. 2. proto:icmp handling: The "icmp" protocol name was returning both ICMPv4 (1) and ICMPv6 (58), but Tailscale only returns ICMPv4. Users should use "ipv6-icmp" or protocol number 58 explicitly for IPv6 ICMP. Update all test expectations accordingly. This significantly reduces test file line count by replacing duplicated CGNAT range patterns with single wildcard entries.
2026-01-28 12:05:08 +00:00
// All nodes get wildcard filters with {IP: "*"} format matching Tailscale.
policy/v2: add subnet routes and exit node compatibility tests Add comprehensive test file for validating Headscale's ACL engine behavior for subnet routes and exit nodes against documented Tailscale SaaS behavior. Tests cover: - Category A: Subnet route basics (wildcard includes routes, tag-based ACL excludes routes) - Category B: Exit node behavior (exit routes not in SrcIPs) - Category F: Filter placement rules (filters on destination nodes) - Category G: Protocol and port restrictions - Category R: Route coverage rules - Category O: Overlapping routes - Category H: Edge cases (wildcard formats, CGNAT handling) - Category T: Tag resolution (tags resolve to node IPs only) - Category I: IPv6 specific behavior The tests document expected Tailscale SaaS behavior with TODOs marking areas where Headscale currently differs. This provides a baseline for compatibility improvements.
2026-01-28 12:04:52 +00:00
{
name: "B3_exit_node_advertises_routes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": wildcardFilter,
"client2": wildcardFilter,
"subnet-router": wildcardFilter,
"exit-node": wildcardFilter,
"multi-router": wildcardFilter,
"ha-router1": wildcardFilter,
"ha-router2": wildcardFilter,
"big-router": wildcardFilter,
"user1": wildcardFilter,
},
},
// B5: Exit node with wildcard destination has ExitNodeOption
//
// Exit nodes should have ExitNodeOption=true in MapResponse.
policy: fix wildcard DstPorts format and proto:icmp handling Fix two compatibility issues discovered in Tailscale SaaS testing: 1. Wildcard DstPorts format: Headscale was expanding wildcard destinations to CGNAT ranges (100.64.0.0/10, fd7a:115c:a1e0::/48) while Tailscale uses {IP: "*"} directly. Add detection for wildcard (Asterix) alias type in filter compilation to use the correct format. 2. proto:icmp handling: The "icmp" protocol name was returning both ICMPv4 (1) and ICMPv6 (58), but Tailscale only returns ICMPv4. Users should use "ipv6-icmp" or protocol number 58 explicitly for IPv6 ICMP. Update all test expectations accordingly. This significantly reduces test file line count by replacing duplicated CGNAT range patterns with single wildcard entries.
2026-01-28 12:05:08 +00:00
// All nodes get wildcard filters with {IP: "*"} format matching Tailscale.
policy/v2: add subnet routes and exit node compatibility tests Add comprehensive test file for validating Headscale's ACL engine behavior for subnet routes and exit nodes against documented Tailscale SaaS behavior. Tests cover: - Category A: Subnet route basics (wildcard includes routes, tag-based ACL excludes routes) - Category B: Exit node behavior (exit routes not in SrcIPs) - Category F: Filter placement rules (filters on destination nodes) - Category G: Protocol and port restrictions - Category R: Route coverage rules - Category O: Overlapping routes - Category H: Edge cases (wildcard formats, CGNAT handling) - Category T: Tag resolution (tags resolve to node IPs only) - Category I: IPv6 specific behavior The tests document expected Tailscale SaaS behavior with TODOs marking areas where Headscale currently differs. This provides a baseline for compatibility improvements.
2026-01-28 12:04:52 +00:00
{
name: "B5_exit_with_wildcard_dst",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": wildcardFilter,
"client2": wildcardFilter,
"subnet-router": wildcardFilter,
"exit-node": wildcardFilter,
"multi-router": wildcardFilter,
"ha-router1": wildcardFilter,
"ha-router2": wildcardFilter,
"big-router": wildcardFilter,
"user1": wildcardFilter,
},
},
// TODO: Verify Tailscale filter distribution for tag source with wildcard destination
//
// B6: ExitNodeOption field verification
//
// ACL: tag:exit -> *:*
// Nodes with approved exit routes should have ExitNodeOption=true.
//
// TAILSCALE BEHAVIOR:
// - Need to verify if only exit-tagged nodes receive filters
// - Or if ALL nodes (destinations) receive filters
//
// HEADSCALE BEHAVIOR:
// - ALL nodes receive filters (they're all destinations)
// - SrcIPs = tag:exit node IPs
// - DstPorts = explicit CIDR ranges (not "*")
//
// ROOT CAUSE:
// The test expected only exit-tagged nodes to get filters, but with
// `tag:exit -> *:*`, all nodes are destinations and should get filters.
{
name: "B6_exit_node_option_field",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:exit"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale) - need verification:
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil, // Or filter?
"client2": nil, // Or filter?
"subnet-router": nil, // Or filter?
"ha-router1": nil, // Or filter?
"ha-router2": nil, // Or filter?
"big-router": nil, // Or filter?
"user1": nil, // Or filter?
"exit-node": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": { ... },
},
*/
// ACTUAL (Headscale):
// All nodes receive filters (they're all destinations)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Same as B6 - verify Tailscale filter distribution
//
// B7: Multiple exit nodes verification
//
// ACL: tag:exit -> *:*
// Both exit-node and multi-router have tag:exit.
// Same pattern as B6 - all nodes are destinations and receive filters.
//
// TAILSCALE BEHAVIOR:
// - Need to verify actual filter distribution
//
// HEADSCALE BEHAVIOR:
// - All nodes receive filters (same as B6)
{
name: "B7_multiple_exit_nodes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:exit"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale) - need verification:
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil, // Or filter?
// ... same pattern as B6
"exit-node": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": { ... },
},
*/
// ACTUAL (Headscale):
// All nodes receive filters (same as B6)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.121.32.1/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// B9: Exit routes appear in peer AllowedIPs
//
// When viewing exit-node as a peer, AllowedIPs should include exit routes.
policy: fix wildcard DstPorts format and proto:icmp handling Fix two compatibility issues discovered in Tailscale SaaS testing: 1. Wildcard DstPorts format: Headscale was expanding wildcard destinations to CGNAT ranges (100.64.0.0/10, fd7a:115c:a1e0::/48) while Tailscale uses {IP: "*"} directly. Add detection for wildcard (Asterix) alias type in filter compilation to use the correct format. 2. proto:icmp handling: The "icmp" protocol name was returning both ICMPv4 (1) and ICMPv6 (58), but Tailscale only returns ICMPv4. Users should use "ipv6-icmp" or protocol number 58 explicitly for IPv6 ICMP. Update all test expectations accordingly. This significantly reduces test file line count by replacing duplicated CGNAT range patterns with single wildcard entries.
2026-01-28 12:05:08 +00:00
// All nodes get wildcard filters with {IP: "*"} format matching Tailscale.
policy/v2: add subnet routes and exit node compatibility tests Add comprehensive test file for validating Headscale's ACL engine behavior for subnet routes and exit nodes against documented Tailscale SaaS behavior. Tests cover: - Category A: Subnet route basics (wildcard includes routes, tag-based ACL excludes routes) - Category B: Exit node behavior (exit routes not in SrcIPs) - Category F: Filter placement rules (filters on destination nodes) - Category G: Protocol and port restrictions - Category R: Route coverage rules - Category O: Overlapping routes - Category H: Edge cases (wildcard formats, CGNAT handling) - Category T: Tag resolution (tags resolve to node IPs only) - Category I: IPv6 specific behavior The tests document expected Tailscale SaaS behavior with TODOs marking areas where Headscale currently differs. This provides a baseline for compatibility improvements.
2026-01-28 12:04:52 +00:00
{
name: "B9_exit_routes_in_allowedips",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": wildcardFilter,
"client2": wildcardFilter,
"subnet-router": wildcardFilter,
"exit-node": wildcardFilter,
"multi-router": wildcardFilter,
"ha-router1": wildcardFilter,
"ha-router2": wildcardFilter,
"big-router": wildcardFilter,
"user1": wildcardFilter,
},
},
// B10: Exit routes NOT in PrimaryRoutes field
//
// PrimaryRoutes is for subnet routes only, not exit routes.
// Exit routes (0.0.0.0/0, ::/0) should NOT appear in PrimaryRoutes.
policy: fix wildcard DstPorts format and proto:icmp handling Fix two compatibility issues discovered in Tailscale SaaS testing: 1. Wildcard DstPorts format: Headscale was expanding wildcard destinations to CGNAT ranges (100.64.0.0/10, fd7a:115c:a1e0::/48) while Tailscale uses {IP: "*"} directly. Add detection for wildcard (Asterix) alias type in filter compilation to use the correct format. 2. proto:icmp handling: The "icmp" protocol name was returning both ICMPv4 (1) and ICMPv6 (58), but Tailscale only returns ICMPv4. Users should use "ipv6-icmp" or protocol number 58 explicitly for IPv6 ICMP. Update all test expectations accordingly. This significantly reduces test file line count by replacing duplicated CGNAT range patterns with single wildcard entries.
2026-01-28 12:05:08 +00:00
// All nodes get wildcard filters with {IP: "*"} format matching Tailscale.
policy/v2: add subnet routes and exit node compatibility tests Add comprehensive test file for validating Headscale's ACL engine behavior for subnet routes and exit nodes against documented Tailscale SaaS behavior. Tests cover: - Category A: Subnet route basics (wildcard includes routes, tag-based ACL excludes routes) - Category B: Exit node behavior (exit routes not in SrcIPs) - Category F: Filter placement rules (filters on destination nodes) - Category G: Protocol and port restrictions - Category R: Route coverage rules - Category O: Overlapping routes - Category H: Edge cases (wildcard formats, CGNAT handling) - Category T: Tag resolution (tags resolve to node IPs only) - Category I: IPv6 specific behavior The tests document expected Tailscale SaaS behavior with TODOs marking areas where Headscale currently differs. This provides a baseline for compatibility improvements.
2026-01-28 12:04:52 +00:00
{
name: "B10_exit_routes_not_in_primaryroutes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": wildcardFilter,
"client2": wildcardFilter,
"subnet-router": wildcardFilter,
"exit-node": wildcardFilter,
"multi-router": wildcardFilter,
"ha-router1": wildcardFilter,
"ha-router2": wildcardFilter,
"big-router": wildcardFilter,
"user1": wildcardFilter,
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
pol, err := unmarshalPolicy([]byte(tt.policy))
require.NoError(t, err, "failed to parse policy")
err = pol.validate()
require.NoError(t, err, "policy validation failed")
for nodeName, wantFilters := range tt.wantFilters {
node := findNodeByGivenName(nodes, nodeName)
require.NotNil(t, node, "node %s not found", nodeName)
compiledFilters, err := pol.compileFilterRulesForNode(users, node.View(), nodes.ViewSlice())
require.NoError(t, err, "failed to compile filters for node %s", nodeName)
gotFilters := policyutil.ReduceFilterRules(node.View(), compiledFilters)
if len(wantFilters) == 0 && len(gotFilters) == 0 {
continue
}
if diff := cmp.Diff(wantFilters, gotFilters, cmpOptions()...); diff != "" {
t.Errorf("node %s filters mismatch (-want +got):\n%s", nodeName, diff)
}
}
})
}
}
// TestTailscaleRoutesCompatHARouters tests HA router behavior (Category E).
// These tests verify that multiple routers can advertise the same subnet,
// and that both receive filters even though only one is primary.
func TestTailscaleRoutesCompatHARouters(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// E1: Two HA routers advertise same subnet - both enabled
//
// ACL: * -> 192.168.1.0/24:*
// Both ha-router1 and ha-router2 advertise 192.168.1.0/24.
// Both should receive the filter (both are approved, one is primary).
//
// TAILSCALE BEHAVIOR:
// - Only HA routers get filters (exact route match)
// - Exit nodes do NOT get filters (exit routes don't cover for placement)
//
// HEADSCALE BEHAVIOR:
// - HA routers correctly get filters
// - Exit nodes also get filters because 0.0.0.0/0 "covers" destination
//
// ROOT CAUSE:
// Same as A3 - exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "E1_ha_two_routers_same_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.1.0/24:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale):
// HA routers correctly get filters, but exit nodes also incorrectly get them
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
// CORRECT: Both HA routers get the filter
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters due to 0.0.0.0/0 coverage
// Tailscale would return nil here
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// E4: HA routers with host alias
//
// ACL: * -> subnet24:22 (subnet24 = 192.168.1.0/24)
// Same as E1 but uses host alias. Exit route coverage issue applies.
{
name: "E4_ha_both_get_filters_host_alias",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["subnet24:22"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": { ... },
"ha-router2": { ... },
},
*/
// ACTUAL (Headscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters due to 0.0.0.0/0 coverage
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// E2: HA primary node appears in peer AllowedIPs
// Same exit route coverage issue as E1.
{
name: "E2_ha_primary_in_allowedips",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.1.0/24:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"exit-node": nil,
"multi-router": nil,
// ... only HA routers get filters
},
*/
// ACTUAL (Headscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// E3: HA secondary does NOT have route in AllowedIPs
// Same exit route coverage issue as E1.
{
name: "E3_ha_secondary_no_route_in_allowedips",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.1.0/24:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"exit-node": nil,
"multi-router": nil,
// ... only HA routers get filters
},
*/
// ACTUAL (Headscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// E5: First advertiser becomes primary, both HA routers get filters
//
// TAILSCALE BEHAVIOR:
// - Only HA routers get filters (they own 192.168.1.0/24)
// - Exit nodes do NOT get filters (exit routes don't count for coverage)
//
// HEADSCALE BEHAVIOR:
// - HA routers correctly get filters
// - Exit nodes also get filters because 0.0.0.0/0 "covers" destination
//
// ROOT CAUSE:
// Same as E1-E4 - exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "E5_first_advertiser_is_primary",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.1.0/24:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes incorrectly get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatFilterPlacement tests filter placement rules (Category F).
// These tests verify that filters go to DESTINATION nodes (route owners),
// not to source nodes, and that route coverage rules are applied correctly.
func TestTailscaleRoutesCompatFilterPlacement(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// F1: Filter goes to destination node (route owner), not source
//
// TAILSCALE BEHAVIOR:
// - Filter placed on subnet-router (owns 10.33.0.0/16) and big-router (owns 10.0.0.0/8)
// - Source nodes (clients, user1) get null filters
// - Exit nodes do NOT get filters (exit routes don't count for coverage)
//
// HEADSCALE BEHAVIOR:
// - Correct for subnet-router and big-router
// - Exit nodes also get filters because 0.0.0.0/0 "covers" destination
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "F1_filter_on_destination_not_source",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.33.0.0/16:22"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes incorrectly get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix DstPorts expansion for autogroup:member to match Tailscale behavior
//
// F2: Subnet as ACL source, autogroup:member as destination
//
// TAILSCALE BEHAVIOR:
// - Each member receives a filter with DstPorts containing ALL member IPs
// - client1's filter has DstPorts with client1, client2, user1 IPs
//
// HEADSCALE BEHAVIOR:
// - Each member receives filter with DstPorts containing ONLY its own IP
// - client1's filter has DstPorts with only client1's IP
//
// ROOT CAUSE:
// DstPorts is not expanded to include all autogroup:member IPs
//
// FIX REQUIRED:
// Expand autogroup:member in DstPorts to include all member IPs, not just self
{
name: "F2_subnet_as_acl_source",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["10.33.0.0/16"], "dst": ["autogroup:member:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
},
*/
// ACTUAL (Headscale): DstPorts only contains self IP, not all member IPs
// Additionally, tagged nodes also incorrectly receive filters
wantFilters: map[string][]tailcfg.FilterRule{
// Members receive filters with ONLY self IP in DstPorts
"client1": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
// INCORRECT: Only client1's IPs, should include all members
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
// INCORRECT: Only client2's IPs
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
// INCORRECT: Only user1's IPs
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Tagged nodes should not get filters but do in Headscale
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
// INCORRECT: Exit nodes get filters with all member IPs in DstPorts
"exit-node": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// F3: Wildcard source, specific subnet destination
//
// TAILSCALE BEHAVIOR:
// - Filter on subnet-router (owns 10.33.0.0/16) and big-router (owns 10.0.0.0/8)
// - Exit nodes do NOT get filters (exit routes don't count for coverage)
//
// HEADSCALE BEHAVIOR:
// - Correct for subnet-router and big-router
// - Exit nodes also get filters because 0.0.0.0/0 "covers" destination
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "F3_wildcard_src_specific_dst",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:22"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes incorrectly get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// F7: Filter DstPorts shows ACL CIDR, not route CIDR
//
// TAILSCALE BEHAVIOR:
// - DstPorts.IP = ACL CIDR (10.33.1.0/24), not route CIDR
// - Only subnet-router and big-router get filters
// - Exit nodes do NOT get filters
//
// HEADSCALE BEHAVIOR:
// - DstPorts.IP correctly uses ACL CIDR (this part works)
// - Exit nodes also get filters because 0.0.0.0/0 "covers" destination
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "F7_filter_dstports_shows_acl_cidr",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.0/24:22"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes incorrectly get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix wildcard destination filter distribution to match Tailscale behavior
//
// F4: Specific source (tag:router), wildcard destination
//
// TAILSCALE BEHAVIOR:
// - Filter sent to all non-source nodes (all nodes except tag:router nodes)
// - Non-router nodes get filter, router nodes don't receive filter for their own traffic
//
// HEADSCALE BEHAVIOR:
// - All nodes get the filter, including the source nodes themselves
// - DstPorts uses expanded CGNAT ranges instead of "*"
//
// ROOT CAUSE:
// Wildcard destination distribution differs - Headscale sends to all nodes
// DstPorts format differs - Headscale expands "*" to CGNAT ranges
//
// FIX REQUIRED:
// Review wildcard destination distribution logic
{
name: "F4_specific_src_wildcard_dst",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:router"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{
"100.100.100.1/32", // big-router
"100.119.139.79/32", // subnet-router
"100.74.117.7/32", // multi-router
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": nil,
"user1": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
},
*/
// ACTUAL (Headscale): All nodes get filters with expanded CGNAT ranges
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{
"100.74.117.7/32", // multi-router
"100.100.100.1/32", // big-router
"100.119.139.79/32", // subnet-router
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.74.117.7/32",
"100.100.100.1/32",
"100.119.139.79/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix bidirectional subnet access and DstPorts expansion to match Tailscale
//
// F5: Bidirectional subnet access
//
// TAILSCALE BEHAVIOR:
// - Rule 1 (member -> subnet): Filters on subnet-router and big-router only
// - Rule 2 (subnet -> member): All members get filter with all member IPs in DstPorts
// - Exit nodes do NOT get filters
//
// HEADSCALE BEHAVIOR:
// - All members get filters (rule 2 distribution to all)
// - DstPorts only contains self IP, not all member IPs
// - Exit nodes also get filters (exit route coverage issue)
//
// ROOT CAUSE:
// 1. autogroup:member DstPorts expansion only includes self
// 2. Exit routes treated as covering subnet destinations
//
// FIX REQUIRED:
// 1. Expand autogroup:member in DstPorts to all member IPs
// 2. Exclude exit routes from filter distribution coverage
{
name: "F5_bidirectional_subnet_access",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.33.0.0/16:*"]},
{"action": "accept", "src": ["10.33.0.0/16"], "dst": ["autogroup:member:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": nil,
"user1": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Multiple issues
wantFilters: map[string][]tailcfg.FilterRule{
// All members get filters with self-only DstPorts
"client1": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
// INCORRECT: Only client1's IPs
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters from BOTH rules
"exit-node": {
// First filter: from rule 1 (member -> subnet)
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
// Second filter: from rule 2 (subnet -> member)
// Exit node gets this because 0.0.0.0/0 "covers" member IPs
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
// First filter: from rule 1 (member -> subnet)
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
// Second filter: from rule 2 (subnet -> member)
// Multi-router gets this because 0.0.0.0/0 "covers" member IPs
{
SrcIPs: []string{"10.33.0.0/16"},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.89.42.23/32", Ports: tailcfg.PortRangeAny},
{IP: "100.90.199.68/32", Ports: tailcfg.PortRangeAny},
{IP: "100.116.73.38/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::d01:2a2e/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::2d01:c747/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::a801:4949/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// F6: Filter SrcIPs expansion with autogroup:member
//
// TAILSCALE BEHAVIOR:
// - Only subnet-router and big-router get filters
// - Exit nodes do NOT get filters
//
// HEADSCALE BEHAVIOR:
// - Correct for subnet-router and big-router
// - Exit nodes also get filters because 0.0.0.0/0 "covers" destination
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "F6_filter_srcips_expansion",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.33.0.0/16:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes incorrectly get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix policy validation to allow undefined tags (matching Tailscale behavior)
//
// F8: Route enabled but ACL source doesn't match any nodes
//
// TAILSCALE BEHAVIOR:
// - Policy is accepted even if tag doesn't exist (no nodes have that tag)
// - All nodes get null filters
//
// HEADSCALE BEHAVIOR:
// - Policy parsing fails with "Tag is not defined in the Policy"
// - Headscale requires all tags to be defined in tagOwners
//
// ROOT CAUSE:
// Headscale validates that all tags in ACLs are defined in tagOwners
// Tailscale allows undefined tags (they just match nothing)
//
// FIX REQUIRED:
// Either relax tag validation or accept that this is a stricter policy mode
// Using group:empty instead (defined but has no members)
{
name: "F8_route_enabled_acl_denies",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["group:empty"], "dst": ["10.33.0.0/16:*"]}
`),
// group:empty has no members, so no source IPs match
// All nodes should get null filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// F9: ACL allows traffic to subnet but no node has that route
//
// TAILSCALE BEHAVIOR:
// - No node has 10.99.0.0/16 route
// - No filters should be generated for any node
//
// HEADSCALE BEHAVIOR:
// - Exit nodes get filters because 0.0.0.0/0 "covers" 10.99.0.0/16
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "F9_route_disabled_acl_allows",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.99.0.0/16:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
},
*/
// ACTUAL (Headscale): Routers with covering routes get filters
// NOTE: big-router (10.0.0.0/8) covers 10.99.0.0/16, so it correctly gets filter
// Exit nodes also incorrectly get filters due to 0.0.0.0/0 coverage
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
// big-router (10.0.0.0/8) correctly covers 10.99.0.0/16
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.99.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.99.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.99.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// runRoutesCompatTests is a helper to run route compatibility tests.
func runRoutesCompatTests(t *testing.T, users types.Users, nodes types.Nodes, tests []routesCompatTest) {
t.Helper()
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
pol, err := unmarshalPolicy([]byte(tt.policy))
require.NoError(t, err, "failed to parse policy")
err = pol.validate()
require.NoError(t, err, "policy validation failed")
for nodeName, wantFilters := range tt.wantFilters {
node := findNodeByGivenName(nodes, nodeName)
require.NotNil(t, node, "node %s not found", nodeName)
compiledFilters, err := pol.compileFilterRulesForNode(users, node.View(), nodes.ViewSlice())
require.NoError(t, err, "failed to compile filters for node %s", nodeName)
gotFilters := policyutil.ReduceFilterRules(node.View(), compiledFilters)
if len(wantFilters) == 0 && len(gotFilters) == 0 {
continue
}
if diff := cmp.Diff(wantFilters, gotFilters, cmpOptions()...); diff != "" {
t.Errorf("node %s filters mismatch (-want +got):\n%s", nodeName, diff)
}
}
})
}
}
// TestTailscaleRoutesCompatRouteCoverage tests route coverage rules (Category R).
// These tests verify that:
// - Route coverage: R.Bits() <= D.Bits() && R.Contains(D.Addr())
// - Exit nodes (0.0.0.0/0) receive filters for ANY destination
// - Parent routes cover child destinations.
func TestTailscaleRoutesCompatRouteCoverage(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// R1: Exit route covers external destination
{
name: "R1_exit_covers_external_dest",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["8.8.8.0/24:53"]}
`),
// 8.8.8.0/24 is external (Google DNS range)
// Exit nodes (0.0.0.0/0) should receive the filter because they cover it
// TODO: Verify this is Tailscale behavior
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil, // 10.33.0.0/16 doesn't cover 8.8.8.0/24
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil, // 10.0.0.0/8 doesn't cover 8.8.8.0/24
"user1": nil,
// Exit nodes cover 8.8.8.0/24
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "8.8.8.0/24", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "8.8.8.0/24", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// R2: Parent route covers child destination
// TODO: Exit route coverage issue - exit nodes get filters when they shouldn't.
// TAILSCALE BEHAVIOR: Exit nodes (0.0.0.0/0) do NOT receive filters for internal
// subnet destinations like 10.33.1.0/24. Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters because Headscale treats exit routes
// (0.0.0.0/0) as covering all IPv4 destinations, including internal ranges.
// ROOT CAUSE: routeCoversDestination() returns true for exit routes covering internal IPs.
{
name: "R2_parent_route_covers_child_dest",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.0/24:22"]}
`),
// big-router has 10.0.0.0/8 - covers 10.33.1.0/24
// subnet-router has 10.33.0.0/16 - also covers 10.33.1.0/24
// Both should receive the filter
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": { ... },
"big-router": { ... },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters due to exit route coverage
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route 0.0.0.0/0 covers 10.33.1.0/24)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// R3: Sibling routes don't cover each other
// TODO: Exit route coverage issue - exit nodes get filters when they shouldn't.
// TAILSCALE BEHAVIOR: Exit nodes do NOT receive filters for internal subnet destinations.
// subnet-router (10.33.0.0/16) correctly does NOT get filter (sibling doesn't cover sibling).
// HEADSCALE BEHAVIOR: Exit nodes get filters because 0.0.0.0/0 covers 10.34.0.0/16.
// ROOT CAUSE: routeCoversDestination() returns true for exit routes covering internal IPs.
{
name: "R3_sibling_routes_no_coverage",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.34.0.0/16:22"]}
`),
// 10.34.0.0/16 is a sibling to 10.33.0.0/16 (different /16 in 10.0.0.0/8)
// subnet-router (10.33.0.0/16) should NOT get filter
// big-router (10.0.0.0/8) SHOULD get filter (parent covers both)
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"big-router": { ... },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters due to exit route coverage
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil, // 10.33.0.0/16 doesn't cover 10.34.0.0/16 (correct)
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
// Only big-router covers 10.34.0.0/16
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.34.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route 0.0.0.0/0 covers 10.34.0.0/16)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.34.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.34.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// R4: Exact match route
// TODO: Exit route coverage issue - exit nodes get filters when they shouldn't.
// TAILSCALE BEHAVIOR: Exit nodes do NOT receive filters for internal subnet destinations.
// HEADSCALE BEHAVIOR: Exit nodes get filters because 0.0.0.0/0 covers 10.33.0.0/16.
// ROOT CAUSE: routeCoversDestination() returns true for exit routes covering internal IPs.
{
name: "R4_exact_match_route",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:22"]}
`),
// Exact match: subnet-router has exactly 10.33.0.0/16
// big-router (10.0.0.0/8) also covers it
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": { ... },
"big-router": { ... },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters due to exit route coverage
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route 0.0.0.0/0 covers 10.33.0.0/16)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatOverlapping tests overlapping route behavior (Category O).
// These tests verify that multiple routers with overlapping routes all receive filters.
func TestTailscaleRoutesCompatOverlapping(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// O2: HA routers both get filter
// TODO: Fix exit route coverage for HA route destinations
// TAILSCALE BEHAVIOR: Only ha-router1 and ha-router2 get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 192.168.1.0/24).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "O2_ha_routers_both_get_filter",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.1.0/24:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": { filter with 192.168.1.0/24:* },
"ha-router2": { filter with 192.168.1.0/24:* },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O3: Parent-child routes on different nodes
// TODO: Fix exit route coverage for subnet destinations
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.1.0/24).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "O3_parent_child_different_nodes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.0/24:22"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": { filter with 10.33.1.0/24:22 },
"big-router": { filter with 10.33.1.0/24:22 },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O6: Exit route expands filter distribution
{
name: "O6_exit_route_expands_filter_dist",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["8.8.8.0/24:53"]}
`),
// Only exit nodes cover 8.8.8.0/24
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "8.8.8.0/24", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "8.8.8.0/24", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O12: Filter dest is ACL CIDR, not route CIDR
// TODO: Fix exit route coverage for subnet destinations
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.1.0/24).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "O12_filter_dest_is_acl_cidr",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.0/24:22"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": { filter with 10.33.1.0/24:22 },
"big-router": { filter with 10.33.1.0/24:22 },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// Must be ACL CIDR "10.33.1.0/24", NOT route "10.33.0.0/16"
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// Must be ACL CIDR "10.33.1.0/24", NOT route "10.0.0.0/8"
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatTagResolution tests tag resolution behavior (Category T).
// These tests verify that tags resolve to node IPs only, NOT to routes.
func TestTailscaleRoutesCompatTagResolution(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// TODO: Fix per-node DstPorts visibility and exit route coverage
//
// T1: Tags resolve to IPs, not routes
//
// TAILSCALE BEHAVIOR:
// - Only tag:router nodes (subnet-router, multi-router, big-router) get filters
// - DstPorts shows ALL tag:router node IPs to each node
// - exit-node does NOT get filter (not in tag:router)
//
// HEADSCALE BEHAVIOR:
// - Exit node also gets filter (0.0.0.0/0 route "covers" tag:router IPs)
// - Per-node DstPorts visibility: each node only sees its OWN IP in DstPorts
// (subnet-router sees only subnet-router IPs, big-router sees only big-router IPs)
//
// ROOT CAUSE:
// 1. Exit routes (0.0.0.0/0) are treated as covering all destinations
// 2. Filter reduction logic scopes DstPorts to per-node visibility
//
// FIX REQUIRED:
// 1. Exclude exit routes from tag-based filter distribution
// 2. Show full destination set to all destination nodes (not per-node scoped)
{
name: "T1_tags_resolve_to_ips_not_routes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:router"], "dst": ["tag:router:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"exit-node": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
"subnet-router": { SrcIPs: all tag:router, DstPorts: ALL tag:router IPs },
"multi-router": { SrcIPs: all tag:router, DstPorts: ALL tag:router IPs },
"big-router": { SrcIPs: all tag:router, DstPorts: ALL tag:router IPs },
},
*/
// ACTUAL (Headscale): Exit gets filter, per-node DstPorts scoped to own IPs
// tag:router = subnet-router (100.119.139.79), multi-router (100.74.117.7), big-router (100.100.100.1)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"ha-router1": nil,
"ha-router2": nil,
"user1": nil,
// INCORRECT: exit-node gets filter due to 0.0.0.0/0 coverage
"exit-node": {
{
SrcIPs: []string{
"100.100.100.1/32", // big-router
"100.119.139.79/32", // subnet-router
"100.74.117.7/32", // multi-router
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
// exit-node sees all tag:router IPs (via 0.0.0.0/0 coverage)
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: subnet-router only sees its own IPs in DstPorts
"subnet-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
// Per-node scoped: only subnet-router's own IPs
DstPorts: []tailcfg.NetPortRange{
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: multi-router sees ALL IPs (it has tag:router AND tag:exit with 0.0.0.0/0)
"multi-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
// multi-router sees ALL tag:router IPs (it has 0.0.0.0/0 exit route coverage)
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: big-router only sees its own IPs in DstPorts
"big-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
// Per-node scoped: only big-router's own IPs
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// T2: tag:exit to tag:exit
{
name: "T2_tag_to_tag_with_exit",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:exit"], "dst": ["tag:exit:*"]}
`),
// tag:exit = exit-node, multi-router
// DstPorts = node IPs only, NOT exit routes
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
"exit-node": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
// Node IPs only - no exit routes 0.0.0.0/0, ::/0
DstPorts: []tailcfg.NetPortRange{
{IP: "100.121.32.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::7f01:2004/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.121.32.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::7f01:2004/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// T5: Multi-tag node appears in both src and dst
{
name: "T5_multi_tag_node_in_both",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:router"], "dst": ["tag:exit:*"]}
`),
// multi-router has BOTH tag:router and tag:exit
// It should appear in BOTH SrcIPs (as router) and DstPorts (as exit)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
"exit-node": {
{
// Source: tag:router nodes
SrcIPs: []string{
"100.100.100.1/32", // big-router
"100.119.139.79/32", // subnet-router
"100.74.117.7/32", // multi-router (has both tags)
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
// Dest: tag:exit nodes (exit-node + multi-router)
DstPorts: []tailcfg.NetPortRange{
{IP: "100.121.32.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::7f01:2004/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "100.121.32.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::7f01:2004/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatProtocolPort tests protocol and port restrictions on subnet routes.
// Category G: Tests from 13-route-acl-interactions.md focusing on protocol/port handling.
func TestTailscaleRoutesCompatProtocolPort(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// G1: Port restriction on subnet (22 only)
//
// TAILSCALE BEHAVIOR:
// - Only subnet-router and big-router get filters
// - Exit nodes do NOT get filters for subnet destinations
//
// HEADSCALE BEHAVIOR:
// - Exit nodes also get filters because 0.0.0.0/0 "covers" everything
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "G1_port_restriction_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.33.0.0/16:22"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"subnet-router": { filter with port 22 },
"big-router": { filter with port 22 },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters due to 0.0.0.0/0 coverage
"exit-node": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// G2: Port range on subnet (80-443)
//
// TAILSCALE BEHAVIOR:
// - Only subnet-router and big-router get filters
// - Exit nodes do NOT get filters for subnet destinations
//
// HEADSCALE BEHAVIOR:
// - Exit nodes also get filters because 0.0.0.0/0 "covers" everything
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "G2_port_range_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:80-443"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"exit-node": nil,
"multi-router": nil,
"subnet-router": { filter with port 80-443 },
"big-router": { filter with port 80-443 },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters due to 0.0.0.0/0 coverage
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit node route coverage to match Tailscale behavior
//
// G7: All ports wildcard
//
// TAILSCALE BEHAVIOR:
// - Only subnet-router and big-router get filters
// - Exit nodes do NOT get filters for subnet destinations
//
// HEADSCALE BEHAVIOR:
// - Exit nodes also get filters because 0.0.0.0/0 "covers" everything
//
// ROOT CAUSE:
// Exit routes (0.0.0.0/0) are treated as covering all destinations
//
// FIX REQUIRED:
// Exclude exit routes from filter distribution coverage checks
{
name: "G7_all_ports_wildcard",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.33.0.0/16:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"exit-node": nil,
"multi-router": nil,
"subnet-router": { filter with all ports },
"big-router": { filter with all ports },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit nodes get filters due to 0.0.0.0/0 coverage
"exit-node": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::2d01:c747/128",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatIPv6 tests IPv6-specific route behavior.
// Category I: Tests from 15-overlapping-subnets.md focusing on IPv6 handling.
func TestTailscaleRoutesCompatIPv6(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
// Create nodes with IPv6 subnet routes
nodeClient1 := &types.Node{
ID: 1,
GivenName: "client1",
User: &users[0],
UserID: &users[0].ID,
IPv4: ptrAddr("100.116.73.38"),
IPv6: ptrAddr("fd7a:115c:a1e0::a801:4949"),
Hostinfo: &tailcfg.Hostinfo{},
ApprovedRoutes: []netip.Prefix{},
}
// IPv6 subnet router
nodeIPv6Router := &types.Node{
ID: 2,
GivenName: "ipv6-router",
IPv4: ptrAddr("100.119.139.80"),
IPv6: ptrAddr("fd7a:115c:a1e0::4001:8ba1"),
Tags: []string{"tag:router"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: []netip.Prefix{
netip.MustParsePrefix("fd00::/48"),
},
},
ApprovedRoutes: []netip.Prefix{
netip.MustParsePrefix("fd00::/48"),
},
}
// IPv6 child route (more specific)
nodeIPv6ChildRouter := &types.Node{
ID: 3,
GivenName: "ipv6-child-router",
IPv4: ptrAddr("100.119.139.81"),
IPv6: ptrAddr("fd7a:115c:a1e0::4001:8ba2"),
Tags: []string{"tag:router"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: []netip.Prefix{
netip.MustParsePrefix("fd00:1::/64"),
},
},
ApprovedRoutes: []netip.Prefix{
netip.MustParsePrefix("fd00:1::/64"),
},
}
// IPv6 exit node (with ::/0)
nodeIPv6Exit := &types.Node{
ID: 4,
GivenName: "ipv6-exit",
IPv4: ptrAddr("100.121.32.2"),
IPv6: ptrAddr("fd7a:115c:a1e0::7f01:2005"),
Tags: []string{"tag:exit"},
Hostinfo: &tailcfg.Hostinfo{
RoutableIPs: []netip.Prefix{
netip.MustParsePrefix("::/0"),
},
},
ApprovedRoutes: []netip.Prefix{
netip.MustParsePrefix("::/0"),
},
}
nodes := types.Nodes{nodeClient1, nodeIPv6Router, nodeIPv6ChildRouter, nodeIPv6Exit}
tests := []routesCompatTest{
// TODO: Fix wildcard DstPorts format, SrcIPs to include subnet routes, and filter distribution
//
// I1: IPv6 subnet route with wildcard ACL
//
// TAILSCALE BEHAVIOR:
// - SrcIPs includes IPv6 subnet route (fd00::/48) in wildcard expansion
// - DstPorts uses {IP: "*"} for wildcard destinations
// - Only client1 receives a filter (filter placed on destination node)
// - Other nodes (routers) do NOT receive filters for wildcard dst
//
// HEADSCALE BEHAVIOR:
// - SrcIPs doesn't include subnet routes, only CGNAT ranges
// - DstPorts expands to CGNAT ranges instead of "*"
// - ALL nodes receive filters (incorrect filter distribution)
//
// ROOT CAUSE:
// 1. Headscale doesn't include subnet routes in wildcard SrcIPs
// 2. Headscale expands "*" to CGNAT ranges instead of using "*"
// 3. Headscale distributes filters to all nodes instead of only the destination
//
// FIX REQUIRED:
// 1. Include advertised subnet routes in wildcard SrcIPs
// 2. Use {IP: "*"} for wildcard destinations
// 3. Fix filter distribution to only send to destination nodes
{
name: "I1_ipv6_subnet_route",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
// Wildcard ACL - SrcIPs should include IPv6 route (fd00::/48)
SrcIPs: []string{
"100.64.0.0/10",
"fd00::/48", // IPv6 subnet route
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ipv6-router": nil,
"ipv6-child-router": nil,
"ipv6-exit": nil,
},
*/
// ACTUAL (Headscale): All nodes get filters with CGNAT DstPorts
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: All routers get filters (should be nil)
"ipv6-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ipv6-child-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ipv6-exit": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix IPv6 parent route coverage
//
// I4: IPv6 specific ACL targeting fd00:1::/64
//
// TAILSCALE BEHAVIOR:
// - ipv6-router (fd00::/48) covers fd00:1::/64 - should get filter
// - ipv6-child-router (fd00:1::/64) exact match - should get filter
// - ipv6-exit (::/0) covers everything - should get filter
//
// HEADSCALE BEHAVIOR:
// - ipv6-router (fd00::/48) does NOT get filter - Headscale doesn't recognize
// that fd00::/48 covers fd00:1::/64 (parent route coverage not working)
// - ipv6-child-router (fd00:1::/64) gets filter (exact match works)
// - ipv6-exit (::/0) gets filter (IPv6 exit route coverage works)
//
// ROOT CAUSE:
// Headscale's route coverage logic doesn't properly handle IPv6 parent routes.
// fd00::/48 should cover fd00:1::/64 but Headscale doesn't recognize this.
//
// FIX REQUIRED:
// Fix IPv6 parent route coverage in filter distribution logic.
{
name: "I4_ipv6_specific_acl",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["fd00:1::/64:443"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
// ipv6-router should get filter (fd00::/48 covers fd00:1::/64)
"ipv6-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1::/64", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ipv6-child-router should also get filter (exact match)
"ipv6-child-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1::/64", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ipv6-exit should get filter (::/0 covers everything)
"ipv6-exit": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1::/64", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): ipv6-router doesn't get filter (parent route coverage broken)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
// INCORRECT: ipv6-router doesn't get filter (should based on parent coverage)
"ipv6-router": nil,
// ipv6-child-router gets filter (exact match works)
"ipv6-child-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1::/64", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ipv6-exit gets filter (::/0 covers everything)
"ipv6-exit": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1::/64", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix IPv6 parent route coverage
//
// I5: IPv6 parent/child route coverage
//
// TAILSCALE BEHAVIOR:
// - ipv6-router (fd00::/48) covers fd00:1:2::/80 - should get filter
// - ipv6-child-router (fd00:1::/64) does NOT cover fd00:1:2::/80
// (fd00:1::/64 = fd00:0001:0000::/64, fd00:1:2::/80 = fd00:0001:0002::/80 - different)
// - ipv6-exit (::/0) covers everything - should get filter
//
// HEADSCALE BEHAVIOR:
// - ipv6-router (fd00::/48) does NOT get filter - Headscale doesn't recognize
// that fd00::/48 covers fd00:1:2::/80 (parent route coverage not working)
// - ipv6-child-router correctly gets nil (fd00:1::/64 doesn't cover fd00:1:2::/80)
// - ipv6-exit gets filter (::/0 covers everything)
//
// ROOT CAUSE:
// Headscale's route coverage logic doesn't properly handle IPv6 parent routes.
// fd00::/48 should cover fd00:1:2::/80 but Headscale doesn't recognize this.
//
// FIX REQUIRED:
// Fix IPv6 parent route coverage in filter distribution logic.
{
name: "I5_ipv6_parent_child_routes",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["fd00:1:2::/80:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
// ipv6-router (fd00::/48) covers fd00:1:2::/80 - should get filter
"ipv6-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"fd7a:115c:a1e0::a801:4949/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1:2::/80", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ipv6-child-router (fd00:1::/64) does NOT cover fd00:1:2::/80
"ipv6-child-router": nil,
// ipv6-exit (::/0) covers everything
"ipv6-exit": {
{
SrcIPs: []string{
"100.116.73.38/32",
"fd7a:115c:a1e0::a801:4949/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1:2::/80", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): ipv6-router doesn't get filter (parent route coverage broken)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
// INCORRECT: ipv6-router doesn't get filter (should based on parent coverage)
"ipv6-router": nil,
// ipv6-child-router correctly doesn't get filter
// (fd00:1::/64 doesn't cover fd00:1:2::/80)
"ipv6-child-router": nil,
// ipv6-exit gets filter (::/0 covers everything)
"ipv6-exit": {
{
SrcIPs: []string{
"100.116.73.38/32",
"fd7a:115c:a1e0::a801:4949/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00:1:2::/80", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// I7: IPv6 exit route coverage (external IPv6 destination)
{
name: "I7_ipv6_exit_coverage",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["2001:db8::/32:443"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"ipv6-router": nil, // fd00::/48 doesn't cover 2001:db8::/32
"ipv6-child-router": nil, // fd00:1::/64 doesn't cover 2001:db8::/32
// Only ipv6-exit (::/0) should get filter
"ipv6-exit": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "2001:db8::/32", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatEdgeCases tests edge cases and unusual configurations.
// Category H: Edge cases from various findings documents.
func TestTailscaleRoutesCompatEdgeCases(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// TODO: Fix wildcard SrcIPs to include subnet routes like Tailscale
//
// H1: Verify wildcard SrcIPs format
//
// TAILSCALE BEHAVIOR:
// - SrcIPs includes CGNAT range + all advertised subnet routes
// - Exit nodes do NOT get filters for tag:router destination
//
// HEADSCALE BEHAVIOR:
// - SrcIPs only includes CGNAT range (no subnet routes)
// - Exit nodes also get filters due to exit route coverage
//
// ROOT CAUSE:
// 1. Headscale doesn't include subnet routes in wildcard SrcIPs
// 2. Exit routes (0.0.0.0/0) treated as covering all destinations
//
// FIX REQUIRED:
// 1. Include advertised subnet routes in wildcard SrcIPs
// 2. Exclude exit routes from filter distribution
{
name: "H1_wildcard_srcips_format",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["tag:router:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"exit-node": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10", "fd7a:115c:a1e0::/48",
"10.0.0.0/8", "10.33.0.0/16", "172.16.0.0/24", "192.168.1.0/24", // routes!
},
DstPorts: ... tag:router IPs,
},
},
// ... multi-router and big-router with same SrcIPs pattern
},
*/
// ACTUAL (Headscale):
// - SrcIPs missing routes
// - DstPorts only contains node's own IPs (not all tag:router IPs)
// - exit-node gets filter
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
// INCORRECT: DstPorts only contains self IPs, not all tag:router IPs
"subnet-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
// Only subnet-router's own IPs
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// multi-router has tag:router AND tag:exit, gets all tag:router IPs
"multi-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
// All tag:router IPs
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
// Only big-router's own IPs
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit node gets filter (should be nil)
// Exit-node has tag:exit, NOT tag:router, so shouldn't get filter
// But due to exit route coverage, it gets ALL tag:router IPs
"exit-node": {
{
SrcIPs: []string{
"100.64.0.0/10",
"fd7a:115c:a1e0::/48",
},
DstPorts: []tailcfg.NetPortRange{
// All tag:router IPs (exit-node sees all because of route coverage)
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H9: Large prefix (/8) subnet route
// TODO: Fix exit route coverage and child route coverage
// TAILSCALE BEHAVIOR: Only big-router (has 10.0.0.0/8) gets the filter.
// subnet-router (10.33.0.0/16) is a CHILD of 10.0.0.0/8 - doesn't cover parent.
// Exit nodes do NOT get filters for specific subnet destinations.
// HEADSCALE BEHAVIOR: Exit nodes get filters (0.0.0.0/0 covers). subnet-router also
// gets filter (Headscale incorrectly treats child routes as covering).
// ROOT CAUSE: Two issues: (1) Exit route coverage, (2) Child route coverage.
// FIX REQUIRED: Exclude exit nodes and fix route coverage to only include parents.
{
name: "H9_large_prefix_works",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.0.0.0/8:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": {
{
SrcIPs: memberSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
},
*/
// ACTUAL (Headscale): Exit nodes and child routes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": {
{
SrcIPs: memberSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// subnet-router incorrectly gets filter (child route coverage)
"subnet-router": {
{
SrcIPs: memberSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: memberSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: memberSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H2: Wildcard DstPorts format
// TODO: Fix wildcard DstPorts format and filter distribution
// TAILSCALE BEHAVIOR: DstPorts uses {IP: "*"} for wildcard destinations.
// Only client1 receives a filter (filter placed on destination node).
// HEADSCALE BEHAVIOR: DstPorts expands to CGNAT ranges (100.64.0.0/10, fd7a:115c:a1e0::/48).
// ALL nodes receive filters.
// ROOT CAUSE: Two issues: (1) Headscale expands "*" to CGNAT ranges instead of using "*",
// (2) Headscale distributes filters to all nodes instead of only the destination.
// FIX REQUIRED: Use {IP: "*"} for wildcard destinations and fix filter distribution.
{
name: "H2_wildcard_dstports_format",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["*:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: memberSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
},
*/
// ACTUAL (Headscale): DstPorts expanded to CGNAT, all nodes get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: memberSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H3: CGNAT range expansion in wildcard
// TODO: Fix filter distribution and exit route coverage for tag destinations
// TAILSCALE BEHAVIOR: Only tag:router nodes (subnet-router, multi-router, big-router)
// receive filters. Each receives DstPorts containing ALL tag:router node IPs.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (exit route covers tag:router IPs).
// Each node only sees its OWN IPs in DstPorts, not all tag:router IPs.
// ROOT CAUSE: Two issues: (1) Exit route coverage gives filters to exit-node,
// (2) Per-node DstPorts filtering shows only self IPs instead of all tag:router IPs.
// FIX REQUIRED: Exclude exit nodes from tag-based destinations, fix DstPorts to include all.
{
name: "H3_cgnat_range_expansion",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["tag:router:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"exit-node": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// All tag:router node IPs
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny}, // big-router
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny}, // subnet-router
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny}, // multi-router
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": nil, // Also tag:router but expected to get filter
"big-router": nil, // Also tag:router but expected to get filter
},
*/
// ACTUAL (Headscale): Each node only sees its own IPs in DstPorts,
// multi-router and big-router also get filters, exit-node incorrectly gets filter
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// Only self IPs
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// All tag:router IPs (multi-router sees all)
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// Only self IPs
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// exit-node incorrectly gets filter (exit route covers tag:router IPs)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.100.1/32", Ports: tailcfg.PortRangeAny},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRangeAny},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H4: IPv6 range in SrcIPs
// TODO: Fix wildcard DstPorts format and filter distribution
// TAILSCALE BEHAVIOR: DstPorts uses {IP: "*"} for wildcard destinations.
// SrcIPs includes fd7a:115c:a1e0::/48 (IPv6 Tailscale range). Only client1 receives filter.
// HEADSCALE BEHAVIOR: DstPorts expands to CGNAT ranges. ALL nodes receive filters.
// ROOT CAUSE: Same as H2 - Headscale expands "*" to CGNAT and distributes to all nodes.
// FIX REQUIRED: Use {IP: "*"} for wildcard destinations and fix filter distribution.
{
name: "H4_ipv6_range_in_srcips",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
},
*/
// ACTUAL (Headscale): All nodes get filters with CGNAT DstPorts
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H7: Two nodes claiming same subnet - first is primary
// TODO: Fix exit route coverage for subnet destinations
// TAILSCALE BEHAVIOR: Only ha-router1 and ha-router2 (which have 192.168.1.0/24) get filters.
// Exit nodes do NOT get filters for specific subnet destinations.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 192.168.1.0/24).
// ROOT CAUSE: Exit route coverage gives filters to exit-node and multi-router.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "H7_two_nodes_same_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.1.0/24:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers 192.168.1.0/24)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H10: Very small prefix (/32)
// TODO: Fix exit route coverage for /32 destinations
// TAILSCALE BEHAVIOR: Only subnet-router (10.33.0.0/16) and big-router (10.0.0.0/8) get filters.
// These routes cover 10.33.0.100/32. Exit nodes do NOT get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.0.100/32).
// ROOT CAUSE: Exit route coverage gives filters to exit-node and multi-router.
// FIX REQUIRED: Exclude exit nodes from specific IP destinations.
{
name: "H10_very_small_prefix",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.100/32:80"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalR tests additional route coverage scenarios (Category R).
func TestTailscaleRoutesCompatAdditionalR(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// R5: Route coverage check logic verification
// TODO: Exit route coverage issue - exit nodes get filters when they shouldn't.
// TAILSCALE BEHAVIOR: Exit nodes do NOT receive filters for internal subnet destinations.
// HEADSCALE BEHAVIOR: Exit nodes get filters because 0.0.0.0/0 covers 10.33.1.0/24.
// ROOT CAUSE: routeCoversDestination() returns true for exit routes covering internal IPs.
{
name: "R5_route_coverage_check_logic",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.0/24:22"]}
`),
// Route coverage: R.Bits() <= D.Bits() && R.Contains(D.Addr())
// 10.0.0.0/8 (bits=8) <= 24 && contains 10.33.1.0 -> YES
// 10.33.0.0/16 (bits=16) <= 24 && contains 10.33.1.0 -> YES
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": { ... },
"big-router": { ... },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters due to exit route coverage
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route 0.0.0.0/0 covers 10.33.1.0/24)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// R6: IPv6 route coverage
// TODO: Exit route coverage issue - exit nodes get filters for IPv6 Tailscale range.
// TAILSCALE BEHAVIOR: No nodes get filters for IPv6 addresses in the Tailscale range
// (fd7a:115c:a1e0::/48) as these are node IPs, not routed destinations.
// HEADSCALE BEHAVIOR: Exit nodes get filters because ::/0 covers all IPv6 addresses.
// ROOT CAUSE: routeCoversDestination() returns true for exit routes covering all IPs.
{
name: "R6_ipv6_route_coverage",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["fd7a:115c:a1e0::1/128:443"]}
`),
// Targeting a specific IPv6 in the Tailscale range
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
},
*/
// ACTUAL (Headscale): Exit nodes get filters (exit route ::/0 covers all IPv6)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
// Exit nodes incorrectly get filters (exit route ::/0 covers fd7a:115c:a1e0::1)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "fd7a:115c:a1e0::1/128", Ports: tailcfg.PortRange{First: 443, Last: 443}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "fd7a:115c:a1e0::1/128", Ports: tailcfg.PortRange{First: 443, Last: 443}}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// R7: Exit node IPv6 coverage
{
name: "R7_exit_ipv6_coverage",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["2001:db8::1/128:443"]}
`),
// External IPv6 address - only exit nodes cover
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
// Exit nodes cover all destinations
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "2001:db8::1/128", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "2001:db8::1/128", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// R8: Mixed IPv4/IPv6 coverage
// TODO: Multiple coverage issues in this test:
// 1. Exit route coverage: exit nodes get IPv4 filters (0.0.0.0/0 covers 10.33.0.0/16)
// 2. Node IP coverage: all nodes get IPv6 filters because their IPv6 addresses are in
// fd7a:115c:a1e0::/48 which overlaps with the destination fd7a:115c:a1e0::/64
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters (IPv4 only).
// HEADSCALE BEHAVIOR:
// - All nodes get filters for IPv6 (node IPs are in fd7a:115c:a1e0::/48)
// - Exit nodes get filters for IPv4 (exit route covers 10.33.0.0/16)
// - subnet-router and big-router get both IPv4 and IPv6
// ROOT CAUSE: Node IP prefixes incorrectly treated as routes covering destinations.
{
name: "R8_mixed_ipv4_ipv6_coverage",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:*", "fd7a:115c:a1e0::/64:*"]}
`),
// Both IPv4 and IPv6 destinations
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"subnet-router": { IPv4 only: 10.33.0.0/16 },
"big-router": { IPv4 only: 10.33.0.0/16 },
},
*/
// ACTUAL (Headscale): Multiple issues - node IPs treated as routes, exit coverage
wantFilters: map[string][]tailcfg.FilterRule{
// All nodes get IPv6 filters because their IPs are in fd7a:115c:a1e0::/48
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny}},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// subnet-router and big-router get both IPv4 (from routes) and IPv6 (from node IPs)
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes get both IPv4 (exit route) and IPv6 (exit route + node IPs)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::/64", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalO tests additional overlapping route scenarios (Category O).
func TestTailscaleRoutesCompatAdditionalO(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// O1: Overlapping routes not merged
// TODO: Fix wildcard destination handling for nodes with routes
// TAILSCALE BEHAVIOR: Only client1 gets filters (dst *:* only goes to primary node).
// HEADSCALE BEHAVIOR: All nodes get filters (dst *:* expands to Headscale IP ranges for all nodes).
// ROOT CAUSE: Wildcard destination expands to Headscale IP ranges, not literal "*".
// FIX REQUIRED: Limit *:* distribution to match Tailscale behavior.
{
name: "O1_overlapping_routes_not_merged",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": { filter with *:* },
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
},
*/
// ACTUAL (Headscale): All nodes get filters with expanded IP ranges
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// All routers get filters because *:* expands to all Headscale IP ranges
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O4: Three-way hierarchy
// TODO: Fix exit route coverage for subnet destinations
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.1.128/25).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "O4_three_way_hierarchy",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.128/25:22"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"subnet-router": { filter with 10.33.1.128/25:22 },
"big-router": { filter with 10.33.1.128/25:22 },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.128/25", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.128/25", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.128/25", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.128/25", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O5: Sibling routes with parent ACL
// TODO: Fix exit route coverage and subnet-router getting parent ACL filter
// TAILSCALE BEHAVIOR: Only big-router gets filters (exact /8 route match).
// HEADSCALE BEHAVIOR: Exit nodes get filters (0.0.0.0/0 covers 10.0.0.0/8),
// and subnet-router gets filters (10.33.0.0/16 is within /8).
// ROOT CAUSE: Exit route coverage + child routes get parent ACL filters.
// FIX REQUIRED: Exclude exit nodes and child routes from parent ACL.
{
name: "O5_sibling_routes_with_parent_acl",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.0.0.0/8:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": { filter with 10.0.0.0/8:* },
},
*/
// ACTUAL (Headscale): Exit nodes and subnet-router also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// subnet-router incorrectly gets filter (child route within parent ACL)
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O7: Specific IP targeting with multiple covering routes
// TODO: Fix exit route coverage for specific IP destinations
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.0.100/32).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "O7_specific_ip_targeting",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.100/32:80"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"subnet-router": { filter with 10.33.0.100/32:80 },
"big-router": { filter with 10.33.0.100/32:80 },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.100/32", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O10: ACL dest covered by multiple routes
// TODO: Fix exit route coverage for subnet destinations
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.1.0/24).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "O10_acl_dest_covered_by_multiple",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.0/24:22"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"subnet-router": { filter with 10.33.1.0/24:22 },
"big-router": { filter with 10.33.1.0/24:22 },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O11: ACL dest not covered by any route
// TODO: Fix exit route coverage for uncovered destinations
// TAILSCALE BEHAVIOR: No nodes get filters (no route covers 192.168.99.0/24).
// HEADSCALE BEHAVIOR: Exit nodes get filters (0.0.0.0/0 covers 192.168.99.0/24).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from uncovered destinations.
{
name: "O11_acl_dest_not_covered",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.99.0/24:22"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": nil,
},
*/
// ACTUAL (Headscale): Exit nodes get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.99.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.99.0/24", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalG tests additional protocol and port scenarios (Category G).
func TestTailscaleRoutesCompatAdditionalG(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// G3: Multiple ports on subnet
// TODO: Fix exit route coverage for subnet destinations
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.0.0/16).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "G3_multiple_ports_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:22,80,443"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil,
"multi-router": nil,
"subnet-router": { ... },
"big-router": { ... },
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 80}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 80}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 80}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 80, Last: 80}},
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// G8: Default IPProto (all protocols)
// TODO: Fix exit route coverage for subnet destinations
// TAILSCALE BEHAVIOR: Only subnet-router and big-router get filters.
// HEADSCALE BEHAVIOR: Exit nodes also get filters (0.0.0.0/0 covers 10.33.0.0/16).
// ROOT CAUSE: Exit route coverage.
// FIX REQUIRED: Exclude exit nodes from subnet-specific destinations.
{
name: "G8_default_ipproto",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:22"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"exit-node": nil,
"multi-router": nil,
...
},
*/
// ACTUAL (Headscale): Exit nodes also get filters
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
// TCP=6, UDP=17, ICMP=1, ICMPv6=58
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes incorrectly get filters (exit route covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalT tests additional tag resolution scenarios (Category T).
func TestTailscaleRoutesCompatAdditionalT(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// TODO: Fix wildcard destination expansion and filter distribution
//
// T3: Tag source includes all tagged nodes
//
// TAILSCALE BEHAVIOR:
// - Only client1 gets filter (user-owned, thus a valid destination)
// - DstPorts uses literal "*" for wildcard destination
//
// HEADSCALE BEHAVIOR:
// - ALL nodes get filters (wildcard destination distributed to everyone)
// - DstPorts expands to CGNAT ranges instead of "*"
//
// ROOT CAUSE:
// 1. Wildcard destination distributed to all nodes instead of only non-source nodes
// 2. DstPorts expands wildcards to explicit CGNAT ranges
//
// FIX REQUIRED:
// 1. Limit filter distribution for wildcard destinations
// 2. Use literal "*" in DstPorts for wildcard destinations
{
name: "T3_tag_src_includes_all_tagged",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:router"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{ tag:router IPs },
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
},
},
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"ha-router1": nil,
"ha-router2": nil,
"big-router": nil,
"user1": nil,
},
*/
// ACTUAL (Headscale): ALL nodes get filters, DstPorts expanded to CGNAT ranges
// tag:router = subnet-router, multi-router, big-router
wantFilters: map[string][]tailcfg.FilterRule{
// INCORRECT: All nodes get filters, not just destination nodes
"client1": {
{
SrcIPs: []string{
"100.100.100.1/32", // big-router
"100.119.139.79/32", // subnet-router
"100.74.117.7/32", // multi-router
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
// INCORRECT: DstPorts uses CGNAT ranges instead of "*"
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix per-node DstPorts visibility and exit route coverage
//
// T4: Tag destination includes all tagged nodes
//
// TAILSCALE BEHAVIOR:
// - Only ha-router1 and ha-router2 get filters (tag:ha nodes)
// - DstPorts shows ALL tag:ha node IPs to each node
// - exit-node and multi-router do NOT get filters
//
// HEADSCALE BEHAVIOR:
// - Exit nodes also get filter (0.0.0.0/0 route "covers" tag:ha IPs)
// - Per-node DstPorts visibility: each node only sees its OWN IP in DstPorts
//
// ROOT CAUSE:
// 1. Exit routes (0.0.0.0/0) are treated as covering all destinations
// 2. Filter reduction logic scopes DstPorts to per-node visibility
//
// FIX REQUIRED:
// 1. Exclude exit routes from tag-based filter distribution
// 2. Show full destination set to all destination nodes (not per-node scoped)
{
name: "T4_tag_dst_includes_all_tagged",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["tag:ha:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"exit-node": nil,
"multi-router": nil,
"big-router": nil,
"user1": nil,
"ha-router1": { DstPorts: ALL tag:ha IPs },
"ha-router2": { DstPorts: ALL tag:ha IPs },
},
*/
// ACTUAL (Headscale): Exit nodes get filters, per-node DstPorts scoped
// tag:ha = ha-router1 (100.85.37.108), ha-router2 (100.119.130.32)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"subnet-router": nil,
"big-router": nil,
"user1": nil,
// INCORRECT: exit-node gets filter due to 0.0.0.0/0 coverage
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
// exit-node sees ALL tag:ha IPs via exit route coverage
DstPorts: []tailcfg.NetPortRange{
{IP: "100.119.130.32/32", Ports: tailcfg.PortRangeAny},
{IP: "100.85.37.108/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4501:82a9/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::f101:2597/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: multi-router gets filter due to 0.0.0.0/0 coverage
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
// multi-router sees ALL tag:ha IPs via exit route coverage
DstPorts: []tailcfg.NetPortRange{
{IP: "100.119.130.32/32", Ports: tailcfg.PortRangeAny},
{IP: "100.85.37.108/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4501:82a9/128", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::f101:2597/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: ha-router1 only sees its own IPs in DstPorts
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
// Per-node scoped: only ha-router1's own IPs
DstPorts: []tailcfg.NetPortRange{
{IP: "100.85.37.108/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::f101:2597/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: ha-router2 only sees its own IPs in DstPorts
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
// Per-node scoped: only ha-router2's own IPs
DstPorts: []tailcfg.NetPortRange{
{IP: "100.119.130.32/32", Ports: tailcfg.PortRangeAny},
{IP: "fd7a:115c:a1e0::4501:82a9/128", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAutoApprover tests autoApprover behavior (Category D).
// These tests validate automatic route approval based on tags and prefixes.
// NOTE: AutoApprover affects route ENABLING, not filter distribution.
// The filter tests here verify filters ASSUMING routes are enabled.
func TestTailscaleRoutesCompatAutoApprover(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// D1: Basic route auto-approval with autoApprover
// 10.0.0.0/8 -> tag:router means routes within 10.0.0.0/8
// advertised by nodes with tag:router are auto-approved
{
name: "D1_basic_route_auto_approval",
// This test validates that with autoApprover configured,
// routes matching the prefix/tag combination are enabled.
// Filter distribution follows standard rules.
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:*"]}
`),
// Assuming route is auto-approved and enabled:
// Filter goes to subnet-router (route owner) + big-router (parent route)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
// subnet-router owns 10.33.0.0/16
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// big-router owns 10.0.0.0/8 (covers 10.33.0.0/16)
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// exit-node and multi-router also get filter (0.0.0.0/0 covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D2: Nested prefix approval - autoApprover for parent covers child
{
name: "D2_nested_prefix_approval",
// autoApprover 10.0.0.0/8 covers advertised 10.33.0.0/16
// This test verifies subset prefixes are approved
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:22"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D3: Exact prefix approval
{
name: "D3_exact_prefix_approval",
// autoApprover for exactly 10.33.0.0/16 matches advertised 10.33.0.0/16
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D4: Prefix not covered by autoApprover
// 192.168.0.0/16, but node advertises 10.0.0.0/8 - NOT approved
// Without approval, route not enabled, no filters distributed
{
name: "D4_prefix_not_covered",
// If autoApprover is 192.168.0.0/16 but we target 10.0.0.0/8
// the route would NOT be auto-approved
// This tests that only matching prefixes get filters
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["192.168.1.0/24:*"]}
`),
// Only HA routers own 192.168.1.0/24
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil,
"big-router": nil,
// exit-node and multi-router get filter (0.0.0.0/0 covers)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D5: Wrong tag not approved
// autoApprover 10.0.0.0/8 -> tag:router, but node is tag:ha
{
name: "D5_wrong_tag_not_approved",
// HA routers have tag:ha, not tag:router
// Their 192.168.1.0/24 route would not be auto-approved
// by an autoApprover for tag:router
// But we can still target the route in ACL if manually enabled
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:router"], "dst": ["192.168.1.0/24:*"]}
`),
// tag:router sources: subnet-router, multi-router, big-router
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"subnet-router": nil, // Source, not destination
"big-router": nil, // Source, not destination
"exit-node": {
{
SrcIPs: []string{
"100.100.100.1/32", // big-router
"100.119.139.79/32", // subnet-router
"100.74.117.7/32", // multi-router
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.100.100.1/32",
"100.119.139.79/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::4001:8ba0/128",
"fd7a:115c:a1e0::6401:6401/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix wildcard DstPorts expansion to use "*" instead of CGNAT ranges
//
// D6: Exit node auto-approval - wildcard ACL with routes
//
// TAILSCALE BEHAVIOR:
// - DstPorts uses literal "*" for wildcard destination
// - All nodes get filter with DstPorts: [{IP: "*", Ports: 0-65535}]
//
// HEADSCALE BEHAVIOR:
// - DstPorts expands to CGNAT ranges instead of using "*"
// - Uses {IP: "100.64.0.0/10"} and {IP: "fd7a:115c:a1e0::/48"}
//
// ROOT CAUSE:
// Headscale expands wildcard destinations to explicit IP ranges
// instead of using the "*" shorthand that Tailscale uses
//
// FIX REQUIRED:
// Use literal "*" in DstPorts for wildcard destinations
{
name: "D6_exit_node_auto_approval",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ... all other nodes same pattern with DstPorts: [{IP: "*"}]
},
*/
// ACTUAL (Headscale): DstPorts expanded to CGNAT ranges
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix wildcard DstPorts expansion to use "*" instead of CGNAT ranges
//
// D7: Exit auto-approval wrong tag - tag:exit to wildcard destination
//
// TAILSCALE BEHAVIOR:
// - DstPorts uses literal "*" for wildcard destination
// - tag:exit (exit-node, multi-router) can access anywhere
//
// HEADSCALE BEHAVIOR:
// - DstPorts expands to CGNAT ranges instead of using "*"
// - Uses {IP: "100.64.0.0/10"} and {IP: "fd7a:115c:a1e0::/48"}
//
// ROOT CAUSE:
// Headscale expands wildcard destinations to explicit IP ranges
//
// FIX REQUIRED:
// Use literal "*" in DstPorts for wildcard destinations
{
name: "D7_exit_auto_approval_wrong_tag",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["tag:exit"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{
"100.121.32.1/32", "100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128", "fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ... all other nodes same pattern with DstPorts: [{IP: "*"}]
},
*/
// ACTUAL (Headscale): DstPorts expanded to CGNAT ranges
// tag:exit = exit-node, multi-router
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: []string{
"100.121.32.1/32", // exit-node
"100.74.117.7/32", // multi-router
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.121.32.1/32",
"100.74.117.7/32",
"fd7a:115c:a1e0::7f01:2004/128",
"fd7a:115c:a1e0::c401:7508/128",
},
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D8: Auto-approval enables route, but ACL still enforced
// Route is enabled via autoApprover, but restrictive ACL limits access
{
name: "D8_auto_approval_acl_interaction",
// Route auto-approved, but ACL only allows specific source
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["10.33.0.0/16:22"]}
`),
// Only autogroup:member sources (user-owned nodes)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil, // Source, not destination
"client2": nil, // Source, not destination
"user1": nil, // Source, not destination
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: []string{
"100.116.73.38/32", // client1
"100.89.42.23/32", // client2
"100.90.199.68/32", // user1
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D9: Auto-approval triggers on advertise
// Policy exists first, then node advertises - triggers approval
// This is a state/timing test - filter distribution is the same
{
name: "D9_auto_approval_triggers_on_advertise",
// Same as D1 - validates consistent behavior
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D10: Auto-approval retroactive
// Node advertised first, policy added later - requires re-advertisement
// Same filter distribution as D1 when route is enabled
{
name: "D10_auto_approval_retroactive",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:443"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// D11: Overlapping auto-approvers
// 10.0.0.0/8 -> tag:router, 10.33.0.0/16 -> tag:special
// Both are valid for their respective tags
{
name: "D11_overlapping_auto_approvers",
// Both big-router (10.0.0.0/8) and subnet-router (10.33.0.0/16)
// can be approved by different autoApprover rules
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.0.0.0/8:80"]}
`),
// Targeting 10.0.0.0/8 - only big-router exact match + exit nodes
// subnet-router's 10.33.0.0/16 is WITHIN 10.0.0.0/8 so also gets filter
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.0.0.0/8", Ports: tailcfg.PortRange{First: 80, Last: 80}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalProtocol tests additional protocol restrictions (G4-G6).
func TestTailscaleRoutesCompatAdditionalProtocol(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// G4: Protocol ICMP only
// proto:icmp results in IPProto=[1] (ICMP only)
// NOTE: Exit nodes still get filters due to exit route coverage issue (separate TODO)
{
name: "G4_protocol_icmp_subnet",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:*"], "proto": "icmp"}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolICMP},
},
},
// Exit nodes also get filters (exit route coverage issue)
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolICMP},
},
},
},
},
// G5: Protocol TCP only
{
name: "G5_protocol_tcp_only",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:22"], "proto": "tcp"}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
// TCP only
IPProto: []int{ProtocolTCP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP},
},
},
},
},
// G6: Protocol UDP only
{
name: "G6_protocol_udp_only",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:53"], "proto": "udp"}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
// UDP only
IPProto: []int{ProtocolUDP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
IPProto: []int{ProtocolUDP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
IPProto: []int{ProtocolUDP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRange{First: 53, Last: 53}},
},
IPProto: []int{ProtocolUDP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalEdgeCases tests additional edge cases (H5, H6, H8, H11).
func TestTailscaleRoutesCompatAdditionalEdgeCases(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// H5: Subnet overlaps CGNAT - cannot be enabled
// Route 100.64.0.0/24 overlaps with Tailscale CGNAT range
{
name: "H5_subnet_overlaps_cgnat",
// A route overlapping CGNAT cannot be enabled
// This test verifies no filters are distributed for such routes
// Using a normal subnet route as baseline
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["100.64.0.0/24:*"]}
`),
// TODO: Tailscale blocks routes overlapping CGNAT
// Headscale behavior may differ
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": nil,
"big-router": nil,
// Exit nodes might still get filter since 0.0.0.0/0 covers everything
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "100.64.0.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "100.64.0.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H6: Loopback routes not distributed
// Route 127.0.0.1/32 can be advertised but NOT in peer AllowedIPs
{
name: "H6_loopback_routes_not_distributed",
// Loopback routes are not practical but test edge case handling
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["127.0.0.1/32:*"]}
`),
// TODO: Tailscale allows advertising loopback but doesn't distribute
// Verify Headscale behavior
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": nil,
"big-router": nil,
// Exit nodes might get filter
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "127.0.0.1/32", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "127.0.0.1/32", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H8: CGNAT overlap blocked
// TODO: Fix CGNAT overlap route handling
// TAILSCALE BEHAVIOR: Routes overlapping CGNAT (100.64.0.0/10) are blocked.
// Only exit nodes get filters for destinations in the blocked range.
// HEADSCALE BEHAVIOR: big-router gets filter because its IP (100.100.100.1)
// is within the destination range 100.100.0.0/16.
// ROOT CAUSE: Headscale checks if node IPs are in destination range,
// not just if advertised routes cover the destination.
// FIX REQUIRED: May need to exclude nodes whose IPs are in destination range.
{
name: "H8_cgnat_overlap_blocked",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["100.100.0.0/16:*"]}
`),
/*
EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": nil,
"big-router": nil, // No filter expected
"exit-node": { ... },
"multi-router": { ... },
},
*/
// ACTUAL (Headscale): big-router gets filter (its IP 100.100.100.1 is in 100.100.0.0/16)
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": nil,
// big-router gets filter because its IP (100.100.100.1) is in destination range
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// H11: IPv6 small prefix /128
{
name: "H11_ipv6_small_prefix",
// /128 is a single IPv6 address - smallest possible prefix
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["fd00::1/128:443"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": nil,
"big-router": nil,
// Exit nodes with ::/0 cover all IPv6
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00::1/128", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "fd00::1/128", Ports: tailcfg.PortRange{First: 443, Last: 443}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalIPv6 tests additional IPv6 scenarios (I2, I3, I6).
func TestTailscaleRoutesCompatAdditionalIPv6(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// TODO: Fix wildcard DstPorts format
//
// I2: IPv6 exit route ::/0 - verifies ::/0 NOT in SrcIPs
//
// TAILSCALE BEHAVIOR:
// - DstPorts uses {IP: "*"} for wildcard destinations
// - ::/0 does NOT appear in SrcIPs (exit routes excluded)
// - Filter distributed to all nodes
//
// HEADSCALE BEHAVIOR:
// - DstPorts expands to CGNAT ranges instead of "*"
// - ::/0 correctly excluded from SrcIPs
// - Filter distributed to all nodes (same as Tailscale)
//
// ROOT CAUSE:
// Headscale expands "*" to CGNAT ranges instead of using "*".
//
// FIX REQUIRED:
// Use {IP: "*"} for wildcard destinations.
{
name: "I2_ipv6_exit_route",
// ::/0 is the IPv6 exit route (like 0.0.0.0/0 for IPv4)
// Should NOT appear in SrcIPs
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["*:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "*", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ... same for all nodes with {IP: "*"}
},
*/
// ACTUAL (Headscale): DstPorts expanded to CGNAT ranges
wantFilters: map[string][]tailcfg.FilterRule{
"client1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"client2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"user1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router1": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: wildcardDstPorts,
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit route coverage and per-node DstPorts filtering
//
// I3: IPv6 in wildcard SrcIPs
//
// TAILSCALE BEHAVIOR:
// - SrcIPs includes fd7a:115c:a1e0::/48 (IPv6 Tailscale range) - CORRECT
// - Only tag:router nodes receive filters (subnet-router, multi-router, big-router)
// - Exit-node (tag:exit only) does NOT get filter
// - Each tag:router node sees ALL tag:router IPs in DstPorts
//
// HEADSCALE BEHAVIOR:
// - SrcIPs correctly includes fd7a:115c:a1e0::/48 (IPv6 range works)
// - Exit-node incorrectly gets filter (exit route covers all tag:router IPs)
// - Each node only sees its OWN IPs in DstPorts (not all tag:router IPs)
//
// ROOT CAUSE:
// 1. Exit route coverage: exit-node's 0.0.0.0/0 + ::/0 covers tag:router IPs
// 2. Per-node DstPorts: Headscale only includes self IPs in DstPorts
//
// FIX REQUIRED:
// 1. Exclude exit nodes from tag-based destinations
// 2. Include all matching tag IPs in DstPorts for each destination node
{
name: "I3_ipv6_in_wildcard_srcips",
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["tag:router:22"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil, // tag:exit, NOT tag:router
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// ALL tag:router IPs
{IP: "100.100.100.1/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// ... multi-router and big-router with same ALL tag:router IPs
},
*/
// ACTUAL (Headscale): exit-node gets filter, each node sees only self IPs
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
// INCORRECT: subnet-router only sees its own IPs
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// Only self IPs (missing big-router and multi-router IPs)
{IP: "100.119.139.79/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// multi-router has tag:router AND tag:exit, gets all tag:router IPs
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// All tag:router IPs (multi-router sees all)
{IP: "100.100.100.1/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: big-router only sees its own IPs
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
// Only self IPs (missing subnet-router and multi-router IPs)
{IP: "100.100.100.1/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit-node gets filter (should be nil - tag:exit not tag:router)
// Due to exit route coverage, it sees all tag:router IPs
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "100.100.100.1/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "100.119.139.79/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "100.74.117.7/32", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::4001:8ba0/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::6401:6401/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
{IP: "fd7a:115c:a1e0::c401:7508/128", Ports: tailcfg.PortRange{First: 22, Last: 22}},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// TODO: Fix exit route coverage for subnet destinations
//
// I6: Dual-stack node - targeting both IPv4 and IPv6 subnets
//
// TAILSCALE BEHAVIOR:
// - Only subnet-router (10.33.0.0/16) and big-router (10.0.0.0/8) get IPv4 filter
// - No node has fd00:1::/64 route, so no node gets IPv6 filter
// - Exit nodes do NOT get filters for specific subnet destinations
// - Multiple rules with same SrcIPs kept as separate rules
//
// HEADSCALE BEHAVIOR:
// - Exit nodes get filters (exit route covers both subnets)
// - Rules with same SrcIPs and IPProto are MERGED into single rule
// with combined DstPorts
// - No node owns fd00:1::/64, but exit nodes cover it via ::/0
//
// ROOT CAUSE:
// 1. Exit route coverage: 0.0.0.0/0 and ::/0 cover all subnets
// 2. Filter rule merging: Headscale merges rules with identical SrcIPs/IPProto
//
// FIX REQUIRED:
// Exclude exit nodes from specific subnet destinations.
{
name: "I6_dual_stack_node",
// Target both IPv4 and IPv6 subnets
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.0.0/16:*"]},
{"action": "accept", "src": ["*"], "dst": ["fd00:1::/64:*"]}
`),
/* EXPECTED (Tailscale):
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"exit-node": nil, // Exit nodes shouldn't get subnet filters
"multi-router": nil, // Only has 172.16.0.0/24 + exit routes
// subnet-router owns 10.33.0.0/16
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// big-router covers 10.33.0.0/16 via 10.0.0.0/8
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
*/
// ACTUAL (Headscale): Exit nodes cover both, rules merged
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
// subnet-router owns 10.33.0.0/16
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// big-router covers 10.33.0.0/16 via 10.0.0.0/8
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: Exit-node gets MERGED filter covering both subnets
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
// Both destinations merged into single rule
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
{IP: "fd00:1::/64", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// INCORRECT: multi-router gets MERGED filter covering both subnets
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
// Both destinations merged into single rule
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.0.0/16", Ports: tailcfg.PortRangeAny},
{IP: "fd00:1::/64", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
// TestTailscaleRoutesCompatAdditionalOverlapping tests additional overlapping route scenarios (O8, O9).
func TestTailscaleRoutesCompatAdditionalOverlapping(t *testing.T) {
t.Parallel()
users := setupRouteCompatUsers()
nodes := setupRouteCompatNodes(users)
tests := []routesCompatTest{
// O8: Same node overlapping routes
// Node with 10.0.0.0/8, 10.33.0.0/16, 10.33.1.0/24 - NOT merged
{
name: "O8_same_node_overlapping_routes",
// If a single node advertises multiple overlapping routes,
// they should all appear separately, not merged
// big-router has 10.0.0.0/8
// Let's target a specific child prefix
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["*"], "dst": ["10.33.1.0/24:*"]}
`),
// big-router (10.0.0.0/8) and subnet-router (10.33.0.0/16) both cover
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil,
"client2": nil,
"user1": nil,
"ha-router1": nil,
"ha-router2": nil,
"subnet-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"big-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"exit-node": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: wildcardSrcIPs,
DstPorts: []tailcfg.NetPortRange{
{IP: "10.33.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
// O9: Different nodes same route
// Two nodes with 192.168.1.0/24 - only first is primary
{
name: "O9_different_nodes_same_route",
// ha-router1 and ha-router2 both have 192.168.1.0/24
// Both should receive filters, but only one is primary
policy: makeRoutesPolicy(`
{"action": "accept", "src": ["autogroup:member"], "dst": ["192.168.1.0/24:*"]}
`),
wantFilters: map[string][]tailcfg.FilterRule{
"client1": nil, // Source
"client2": nil, // Source
"user1": nil, // Source
"subnet-router": nil,
"big-router": nil,
// Both HA routers get filter despite sharing route
"ha-router1": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"ha-router2": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
// Exit nodes also cover
"exit-node": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
"multi-router": {
{
SrcIPs: []string{
"100.116.73.38/32",
"100.89.42.23/32",
"100.90.199.68/32",
"fd7a:115c:a1e0::a801:4949/128",
"fd7a:115c:a1e0::d01:2a2e/128",
"fd7a:115c:a1e0::2d01:c747/128",
},
DstPorts: []tailcfg.NetPortRange{
{IP: "192.168.1.0/24", Ports: tailcfg.PortRangeAny},
},
IPProto: []int{ProtocolTCP, ProtocolUDP, ProtocolICMP, ProtocolIPv6ICMP},
},
},
},
},
}
runRoutesCompatTests(t, users, nodes, tests)
}
Reference in a new issue Copy permalink