Xray-core/transport/internet/sockopt_windows.go
Zhang San 5a5e615b46
Enable interface setting for socketopt under Windows (#2819)
* allow set interface under windows

Signed-off-by: San Zhang <zhangan@mail.com>

* polish code

Signed-off-by: San Zhang <zhangan@mail.com>

---------

Signed-off-by: San Zhang <zhangan@mail.com>
Co-authored-by: San Zhang <zhangan@mail.com>
2023-12-17 17:56:15 -05:00

102 lines
2.7 KiB
Go

package internet
import (
"encoding/binary"
"net"
"syscall"
"unsafe"
)
const (
TCP_FASTOPEN = 15
IP_UNICAST_IF = 31
IPV6_UNICAST_IF = 31
)
func setTFO(fd syscall.Handle, tfo int) error {
if tfo > 0 {
tfo = 1
}
if tfo >= 0 {
if err := syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, TCP_FASTOPEN, tfo); err != nil {
return err
}
}
return nil
}
func applyOutboundSocketOptions(network string, address string, fd uintptr, config *SocketConfig) error {
if config.Interface != "" {
inf, err := net.InterfaceByName(config.Interface)
if err != nil {
return newError("failed to find the interface").Base(err)
}
isV4 := (network == "tcp4")
if isV4 {
var bytes [4]byte
binary.BigEndian.PutUint32(bytes[:], uint32(inf.Index))
idx := *(*uint32)(unsafe.Pointer(&bytes[0]))
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IP, IP_UNICAST_IF, int(idx)); err != nil {
return newError("failed to set IP_UNICAST_IF").Base(err)
}
} else {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_IPV6, IPV6_UNICAST_IF, inf.Index); err != nil {
return newError("failed to set IPV6_UNICAST_IF").Base(err)
}
}
}
if isTCPSocket(network) {
if err := setTFO(syscall.Handle(fd), config.ParseTFOValue()); err != nil {
return err
}
if config.TcpKeepAliveIdle > 0 {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
return newError("failed to set SO_KEEPALIVE", err)
}
} else if config.TcpKeepAliveIdle < 0 {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 0); err != nil {
return newError("failed to unset SO_KEEPALIVE", err)
}
}
if config.TcpNoDelay {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.IPPROTO_TCP, syscall.TCP_NODELAY, 1); err != nil {
return newError("failed to set TCP_NODELAY", err)
}
}
}
return nil
}
func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig) error {
if isTCPSocket(network) {
if err := setTFO(syscall.Handle(fd), config.ParseTFOValue()); err != nil {
return err
}
if config.TcpKeepAliveIdle > 0 {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
return newError("failed to set SO_KEEPALIVE", err)
}
} else if config.TcpKeepAliveIdle < 0 {
if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 0); err != nil {
return newError("failed to unset SO_KEEPALIVE", err)
}
}
}
return nil
}
func bindAddr(fd uintptr, ip []byte, port uint32) error {
return nil
}
func setReuseAddr(fd uintptr) error {
return nil
}
func setReusePort(fd uintptr) error {
return nil
}