55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// dialer.go - Tor backed proxy.Dialer.
|
|
//
|
|
// To the extent possible under law, Yawning Angel waived all copyright
|
|
// and related or neighboring rights to bulb, using the creative
|
|
// commons "cc0" public domain dedication. See LICENSE or
|
|
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
|
|
|
|
package bulb
|
|
|
|
import (
|
|
"strconv"
|
|
"strings"
|
|
|
|
"golang.org/x/net/proxy"
|
|
)
|
|
|
|
// Dialer returns a proxy.Dialer for the given Tor instance.
|
|
func (c *Conn) Dialer(auth *proxy.Auth) (proxy.Dialer, error) {
|
|
const (
|
|
cmdGetInfo = "GETINFO"
|
|
socksListeners = "net/listeners/socks"
|
|
unixPrefix = "unix:"
|
|
)
|
|
|
|
// Query for the SOCKS listeners via a GETINFO request.
|
|
resp, err := c.Request("%s %s", cmdGetInfo, socksListeners)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if len(resp.Data) != 1 {
|
|
return nil, newProtocolError("no SOCKS listeners configured")
|
|
}
|
|
splitResp := strings.Split(resp.Data[0], " ")
|
|
if len(splitResp) < 1 {
|
|
return nil, newProtocolError("no SOCKS listeners configured")
|
|
}
|
|
|
|
// The first listener will have a "net/listeners/socks=" prefix, and all
|
|
// entries are QuotedStrings.
|
|
laddrStr := strings.TrimPrefix(splitResp[0], socksListeners+"=")
|
|
if laddrStr == splitResp[0] {
|
|
return nil, newProtocolError("failed to parse SOCKS listener")
|
|
}
|
|
laddrStr, _ = strconv.Unquote(laddrStr)
|
|
|
|
// Construct the proxyDialer.
|
|
if strings.HasPrefix(laddrStr, unixPrefix) {
|
|
unixPath := strings.TrimPrefix(laddrStr, unixPrefix)
|
|
return proxy.SOCKS5("unix", unixPath, auth, proxy.Direct)
|
|
}
|
|
|
|
return proxy.SOCKS5("tcp", laddrStr, auth, proxy.Direct)
|
|
}
|