126 lines
2.3 KiB
Go
126 lines
2.3 KiB
Go
package v5
|
|
|
|
import (
|
|
"bytes"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/go-gost/core/common/bufpool"
|
|
"github.com/go-gost/core/logger"
|
|
"github.com/go-gost/gosocks5"
|
|
)
|
|
|
|
type bindConn struct {
|
|
net.Conn
|
|
localAddr net.Addr
|
|
remoteAddr net.Addr
|
|
}
|
|
|
|
func (c *bindConn) LocalAddr() net.Addr {
|
|
return c.localAddr
|
|
}
|
|
|
|
func (c *bindConn) RemoteAddr() net.Addr {
|
|
return c.remoteAddr
|
|
}
|
|
|
|
type udpRelayConn struct {
|
|
udpConn *net.UDPConn
|
|
tcpConn net.Conn
|
|
taddr net.Addr
|
|
bufferSize int
|
|
logger logger.Logger
|
|
}
|
|
|
|
func (c *udpRelayConn) ReadFrom(b []byte) (n int, addr net.Addr, err error) {
|
|
buf := bufpool.Get(c.bufferSize)
|
|
defer bufpool.Put(buf)
|
|
|
|
nn, err := c.udpConn.Read(*buf)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
socksAddr := gosocks5.Addr{}
|
|
header := gosocks5.UDPHeader{
|
|
Addr: &socksAddr,
|
|
}
|
|
dgram := gosocks5.UDPDatagram{
|
|
Header: &header,
|
|
}
|
|
_, err = dgram.ReadFrom(bytes.NewReader((*buf)[:nn]))
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
n = copy(b, dgram.Data)
|
|
addr, err = net.ResolveUDPAddr("udp", header.Addr.String())
|
|
|
|
return
|
|
}
|
|
|
|
func (c *udpRelayConn) Read(b []byte) (n int, err error) {
|
|
n, _, err = c.ReadFrom(b)
|
|
return
|
|
}
|
|
|
|
func (c *udpRelayConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
|
|
socksAddr := gosocks5.Addr{}
|
|
if err = socksAddr.ParseFrom(addr.String()); err != nil {
|
|
return
|
|
}
|
|
|
|
header := gosocks5.UDPHeader{
|
|
Addr: &socksAddr,
|
|
}
|
|
dgram := gosocks5.UDPDatagram{
|
|
Header: &header,
|
|
Data: b,
|
|
}
|
|
|
|
buf := bufpool.Get(c.bufferSize)
|
|
defer bufpool.Put(buf)
|
|
|
|
nn, err := dgram.WriteTo(bytes.NewBuffer((*buf)[:0]))
|
|
if err != nil {
|
|
return
|
|
}
|
|
if nn > int64(len(*buf)) {
|
|
nn = int64(len(*buf))
|
|
}
|
|
|
|
_, err = c.udpConn.Write((*buf)[:nn])
|
|
n = len(b)
|
|
|
|
return
|
|
}
|
|
|
|
func (c *udpRelayConn) Write(b []byte) (n int, err error) {
|
|
return c.WriteTo(b, c.taddr)
|
|
}
|
|
|
|
func (c *udpRelayConn) RemoteAddr() net.Addr {
|
|
return c.taddr
|
|
}
|
|
|
|
func (c *udpRelayConn) LocalAddr() net.Addr {
|
|
return c.udpConn.LocalAddr()
|
|
}
|
|
|
|
func (c *udpRelayConn) Close() error {
|
|
c.udpConn.Close()
|
|
return c.tcpConn.Close()
|
|
}
|
|
|
|
func (c *udpRelayConn) SetDeadline(t time.Time) error {
|
|
return c.udpConn.SetDeadline(t)
|
|
}
|
|
|
|
func (c *udpRelayConn) SetReadDeadline(t time.Time) error {
|
|
return c.udpConn.SetReadDeadline(t)
|
|
}
|
|
|
|
func (c *udpRelayConn) SetWriteDeadline(t time.Time) error {
|
|
return c.udpConn.SetWriteDeadline(t)
|
|
}
|