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tsnet: add test for packet filter generation from netmap

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This is an integration test that covers all the code in Direct, Auto, and
LocalBackend that processes NetMaps and creates a Filter. The test uses
tsnet as a convenient proxy for setting up all the client pieces correctly,
but is not actually a test specific to tsnet.

Updates tailscale/corp#20514

Signed-off-by: James Sanderson <jsanderson@tailscale.com>
This commit is contained in:
James Sanderson
2025-03-21 09:30:42 +00:00
committed by James 'zofrex' Sanderson
parent 5be6ff9b62
commit 85a7abef0c
3 changed files with 254 additions and 2 deletions
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6
ipn/ipnlocal/local.go
View File

@@ -1510,7 +1510,11 @@ func (nb *nodeBackend) peerCapsLocked(src netip.Addr) tailcfg.PeerCapMap {
return nil
}
func (nb *nodeBackend) GetFilterForTest() *filter.Filter {
func (b *LocalBackend) GetFilterForTest() *filter.Filter {
if !testenv.InTest() {
panic("GetFilterForTest called outside of test")
}
nb := b.currentNode()
return nb.filterAtomic.Load()
}

2
ipn/ipnlocal/local_test.go
View File

@@ -5328,7 +5328,7 @@ func TestSrcCapPacketFilter(t *testing.T) {
}},
})
f := lb.currentNode().GetFilterForTest()
f := lb.GetFilterForTest()
res := f.Check(netip.MustParseAddr("2.2.2.2"), netip.MustParseAddr("1.1.1.1"), 22, ipproto.TCP)
if res != filter.Accept {
t.Errorf("Check(2.2.2.2, ...) = %s, want %s", res, filter.Accept)