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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_linux.go
+5 -2
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@@ -13,6 +13,9 @@ func setMark(fd, excludeMark int) error {
return unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_MARK, excludeMark)
}
func setMTUDiscovery(fd int) error {
return unix.SetsockoptInt(fd, unix.IPPROTO_IP, unix.IP_MTU_DISCOVER, unix.IP_PMTUDISC_PROBE)
func setMTUDiscovery(fd int, ipv4 bool) error {
if ipv4 {
return unix.SetsockoptInt(fd, unix.IPPROTO_IP, unix.IP_MTU_DISCOVER, unix.IP_PMTUDISC_PROBE)
}
return unix.SetsockoptInt(fd, unix.IPPROTO_IPV6, unix.IPV6_MTU_DISCOVER, unix.IPV6_PMTUDISC_PROBE)
}