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feat(pmtud/tcp): support mixed IPv4 and IPv6 TCP servers

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- Add default cloudflare and google tls ipv6 servers to default tcp servers
- update integration test to try against both ipv4 and ipv6 servers
This commit is contained in:
Quentin McGaw
2026-02-19 17:11:16 +00:00
parent 1c43a045d1
commit c6b211ef9b
15 changed files with 175 additions and 70 deletions
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internal/pmtud/tcp/tcp_test.go
+9 -10
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@@ -26,17 +26,15 @@ func Test_runTest(t *testing.T) {
netlinker := netlink.New(noopLogger)
loopbackMTU, err := findLoopbackMTU(netlinker)
require.NoError(t, err, "finding loopback IPv4 MTU")
defaultIPv4MTU, err := findDefaultIPv4RouteMTU(netlinker)
require.NoError(t, err, "finding default IPv4 route MTU")
defaultMTU, err := findDefaultRouteMTU(netlinker)
require.NoError(t, err, "finding default route MTU")
ctx, cancel := context.WithCancel(t.Context())
const family = constants.AF_INET
fd, stop, err := startRawSocket(family, excludeMark)
familyToFD, stop, err := startRawSockets([]int{constants.AF_INET, constants.AF_INET6}, excludeMark)
require.NoError(t, err)
const ipv4 = true
tracker := newTracker(fd, ipv4)
tracker := newTracker(familyToFD)
trackerCh := make(chan error)
go func() {
trackerCh <- tracker.listen(ctx)
@@ -71,24 +69,24 @@ func Test_runTest(t *testing.T) {
"remote_not_listening": {
timeout: 50 * time.Millisecond,
server: netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 1, 1, 1}), 12345),
mtu: defaultIPv4MTU - mtuSafetyBuffer,
mtu: defaultMTU - mtuSafetyBuffer,
},
"1.1.1.1:443": {
timeout: 5 * time.Second,
server: netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 1, 1, 1}), 443),
mtu: defaultIPv4MTU - mtuSafetyBuffer,
mtu: defaultMTU - mtuSafetyBuffer,
success: true,
},
"1.1.1.1:80": {
timeout: 5 * time.Second,
server: netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 1, 1, 1}), 80),
mtu: defaultIPv4MTU - mtuSafetyBuffer,
mtu: defaultMTU - mtuSafetyBuffer,
success: true,
},
"8.8.8.8:443": {
timeout: 5 * time.Second,
server: netip.AddrPortFrom(netip.AddrFrom4([4]byte{8, 8, 8, 8}), 443),
mtu: defaultIPv4MTU - mtuSafetyBuffer,
mtu: defaultMTU - mtuSafetyBuffer,
success: true,
},
}
@@ -99,6 +97,7 @@ func Test_runTest(t *testing.T) {
ctrl := gomock.NewController(t)
dst := testCase.server
fd := familyToFD[ip.GetFamily(dst)]
const proto = constants.IPPROTO_TCP
src, cleanup, err := ip.SrcAddr(dst, proto)