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Sockopt: Fix Windows Multicast interface bind #4568

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Merged
RPRX merged 2 commits into from
Mar 30, 2025
Merged

Sockopt: Fix Windows Multicast interface bind #4568

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390a483
Try Fix sockopt `Interface` miss multicast on Windows
xqzr Mar 29, 2025
56ca901
16 & 17L SW
xqzr Mar 30, 2025
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8 changes: 8 additions & 0 deletions transport/internet/sockopt_windows.go
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,8 @@ const (
TCP_FASTOPEN = 15
IP_UNICAST_IF = 31
IPV6_UNICAST_IF = 31
IP_MULTICAST_IF = 9
IPV6_MULTICAST_IF = 9
)

func setTFO(fd syscall.Handle, tfo int) error {
Expand Down Expand Up @@ -41,10 +43,16 @@ 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, 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, IPV6_MULTICAST_IF, inf.Index); err != nil {
return errors.New("failed to set IPV6_MULTICAST_IF").Base(err)
}
}
}

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