Preparing move to modules

[govpn.git] / client / proxy.go

diff --git a/client/proxy.go b/client/proxy.go
new file mode 100644 (file)
index 0000000..de37420
--- /dev/null
+++ b/client/proxy.go
@@ -0,0 +1,59 @@
+/*
+GoVPN -- simple secure free software virtual private network daemon
+Copyright (C) 2014-2019 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, version 3 of the License.
+
+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"
+       "fmt"
+       "net"
+       "net/http"
+
+       "go.cypherpunks.ru/govpn/v7"
+)
+
+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).String())
+       go c.handleTCP(conn)
+}