Refactor govpn-client.

[govpn.git] / src / cypherpunks.ru / govpn / client / proxy.go

diff --git a/src/cypherpunks.ru/govpn/client/proxy.go b/src/cypherpunks.ru/govpn/client/proxy.go
new file mode 100644 (file)
index 0000000..9f8e684
--- /dev/null
+++ b/src/cypherpunks.ru/govpn/client/proxy.go
@@ -0,0 +1,60 @@
+/*
+GoVPN -- simple secure free software virtual private network daemon
+Copyright (C) 2014-2016 Sergey Matveev <stargrave@stargrave.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package client
+
+import (
+       "bufio"
+       "encoding/base64"
+       "net"
+       "fmt"
+       "net/http"
+
+       "cypherpunks.ru/govpn"
+)
+
+func (c *Client) proxyTCP() {
+       proxyAddr, err := net.ResolveTCPAddr("tcp", c.config.ProxyAddress)
+       if err != nil {
+               c.Error <- err
+               return
+       }
+       conn, err := net.DialTCP("tcp", nil, proxyAddr)
+       if err != nil {
+               c.Error <- err
+               return
+       }
+       req := "CONNECT " + c.config.ProxyAddress + " HTTP/1.1\n"
+       req += "Host: " + c.config.ProxyAddress + "\n"
+       if c.config.ProxyAuthentication != "" {
+               req += "Proxy-Authorization: Basic "
+               req += base64.StdEncoding.EncodeToString([]byte(c.config.ProxyAuthentication)) + "\n"
+       }
+       req += "\n"
+       conn.Write([]byte(req))
+       resp, err := http.ReadResponse(
+               bufio.NewReader(conn),
+               &http.Request{Method: "CONNECT"},
+       )
+       if err != nil || resp.StatusCode != http.StatusOK {
+               c.Error <- fmt.Errorf("Unexpected response from proxy: %s", err.Error())
+               return
+       }
+       govpn.Printf(`[proxy-connected remote="%s" addr="%s"]`, c.config.RemoteAddress, *proxyAddr)
+       go c.handleTCP(conn)
+}