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conn.go
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conn.go
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package v5
import (
"bytes"
"net"
"time"
"github.com/dolfly/core/common/bufpool"
"github.com/dolfly/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)
}