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Sockopt: Fix Windows IP_MULTICAST_IF & IPV6_MULTICAST_IF (#4627)

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Completes https://github.com/XTLS/Xray-core/pull/4568
This commit is contained in:
xqzr 2025-04-19 17:30:12 +08:00 committed by GitHub
parent 0995fa41fe
commit 907a182f64
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GPG Key ID: B5690EEEBB952194
1 changed files with 9 additions and 4 deletions
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13
transport/internet/sockopt_windows.go
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@ -41,6 +41,7 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
isV4 := strings.Contains(address, ".")
// note: DO NOT trust the passed network variable, it can be udp6 even if the address is ipv4
// because operating system might(always) use ipv6 socket to process ipv4
host, _, err := net.SplitHostPort(address)
if isV4 {
var bytes [4]byte
binary.BigEndian.PutUint32(bytes[:], uint32(inf.Index))
@ -48,15 +49,19 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, IP_UNICAST_IF, int(idx)); err != nil {
return errors.New("failed to set IP_UNICAST_IF").Base(err)
}
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, int(idx)); err != nil {
return errors.New("failed to set IP_MULTICAST_IF").Base(err)
if ip := net.ParseIP(host); ip != nil && ip.IsMulticast() && isUDPSocket(network) {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, int(idx)); err != nil {
return errors.New("failed to set IP_MULTICAST_IF").Base(err)
}
}
} else {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, IPV6_UNICAST_IF, inf.Index); err != nil {
return errors.New("failed to set IPV6_UNICAST_IF").Base(err)
}
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, inf.Index); err != nil {
return errors.New("failed to set IPV6_MULTICAST_IF").Base(err)
if ip := net.ParseIP(host); ip != nil && ip.IsMulticast() && isUDPSocket(network) {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, inf.Index); err != nil {
return errors.New("failed to set IPV6_MULTICAST_IF").Base(err)
}
}
}
}