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