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40 lines
605 B
Go
40 lines
605 B
Go
9 years ago
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package socks
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import (
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"io"
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"log"
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"net"
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)
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const (
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socks4Version = 0x04
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socks5Version = 0x05
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cmdConnect = 0x01
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addrTypeIPv4 = 0x01
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addrTypeDomain = 0x03
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addrTypeIPv6 = 0x04
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)
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type SocksConn struct {
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ClientConn net.Conn
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}
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func (s *SocksConn) Serve() {
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buf := make([]byte, 1)
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// read version
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io.ReadFull(s.ClientConn, buf)
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switch buf[0] {
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case socks4Version:
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s4 := socks4Conn{client_conn: s.ClientConn}
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s4.Serve()
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case socks5Version:
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s5 := socks5Conn{client_conn: s.ClientConn}
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s5.Serve()
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default:
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log.Printf("error version %s", buf[0])
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s.ClientConn.Close()
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}
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}
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