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policy: reduce routes sent to peers based on packetfilter (#2561)

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* notifier: use convenience funcs

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy: reduce routes based on policy

Fixes #2365

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* hsic: more helper methods

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy: more test cases

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: add route with filter acl integration test

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* integration: correct route reduce test, now failing

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* mapper: compare peer routes against node

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* hs: more output to debug strings

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* types/node: slice.ContainsFunc

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* policy: more reduce route test

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* changelog: add entry for route filter

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

---------

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby 2025-05-04 22:52:47 +03:00 • committed by GitHub
parent b9868f6516
commit 45e38cb080
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16 changed files with 903 additions and 47 deletions
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16
hscontrol/policy/matcher/matcher.go
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@ -2,6 +2,7 @@ package matcher
import (
"net/netip"
"strings"
"slices"
@ -15,6 +16,21 @@ type Match struct {
dests *netipx.IPSet
}
func (m Match) DebugString() string {
var sb strings.Builder
sb.WriteString("Match:\n")
sb.WriteString(" Sources:\n")
for _, prefix := range m.srcs.Prefixes() {
sb.WriteString(" " + prefix.String() + "\n")
}
sb.WriteString(" Destinations:\n")
for _, prefix := range m.dests.Prefixes() {
sb.WriteString(" " + prefix.String() + "\n")
}
return sb.String()
}
func MatchesFromFilterRules(rules []tailcfg.FilterRule) []Match {
matches := make([]Match, 0, len(rules))
for _, rule := range rules {