You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
819 B
Go
50 lines
819 B
Go
package socks
|
|
|
|
import (
|
|
"io"
|
|
"log"
|
|
"net"
|
|
"time"
|
|
)
|
|
|
|
const (
|
|
socks4Version = 0x04
|
|
socks5Version = 0x05
|
|
cmdConnect = 0x01
|
|
addrTypeIPv4 = 0x01
|
|
addrTypeDomain = 0x03
|
|
addrTypeIPv6 = 0x04
|
|
)
|
|
|
|
type dialFunc func(network, addr string) (net.Conn, error)
|
|
|
|
type SocksConn struct {
|
|
ClientConn net.Conn
|
|
Dial dialFunc
|
|
}
|
|
|
|
func (s *SocksConn) Serve() {
|
|
buf := make([]byte, 1)
|
|
|
|
// read version
|
|
io.ReadFull(s.ClientConn, buf)
|
|
|
|
dial := s.Dial
|
|
if s.Dial == nil {
|
|
d := net.Dialer{Timeout: 10 * time.Second}
|
|
dial = d.Dial
|
|
}
|
|
|
|
switch buf[0] {
|
|
case socks4Version:
|
|
s4 := socks4Conn{client_conn: s.ClientConn, dial: dial}
|
|
s4.Serve()
|
|
case socks5Version:
|
|
s5 := socks5Conn{client_conn: s.ClientConn, dial: dial}
|
|
s5.Serve()
|
|
default:
|
|
log.Printf("error version %s", buf[0])
|
|
s.ClientConn.Close()
|
|
}
|
|
}
|