2 GoVPN -- simple secure free software virtual private network daemon
3 Copyright (C) 2014-2015 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
30 func proxyTCP() (io.Writer, chan []byte, chan struct{}) {
31 proxyAddr, err := net.ResolveTCPAddr("tcp", *proxyAddr)
33 log.Fatalln("Can not resolve proxy address:", err)
35 conn, err := net.DialTCP("tcp", nil, proxyAddr)
37 log.Fatalln("Can not connect to proxy:", err)
39 req := "CONNECT " + *remoteAddr + " HTTP/1.1\n"
40 req += "Host: " + *remoteAddr + "\n"
42 req += "Proxy-Authorization: Basic "
43 req += base64.StdEncoding.EncodeToString([]byte(*proxyAuth)) + "\n"
46 conn.Write([]byte(req))
47 resp, err := http.ReadResponse(
48 bufio.NewReader(conn),
49 &http.Request{Method: "CONNECT"},
51 if err != nil || resp.StatusCode != http.StatusOK {
52 log.Fatalln("Unexpected response from proxy")
54 sink := make(chan []byte)
55 ready := make(chan struct{})
56 go handleTCP(conn, sink, ready)
57 go func() { ready <- struct{}{} }()
58 return TCPSender{conn}, sink, ready