func clientHandler(f base.ClientFactory, conn net.Conn, proxyURI *url.URL) {
defer conn.Close()
termMon.onHandlerStart()
defer termMon.onHandlerFinish()
name := f.Transport().Name()
// Read the client's SOCKS handshake.
socksReq, err := socks5.Handshake(conn)
if err != nil {
log.Errorf("%s - client failed socks handshake: %s", name, err)
return
}
addrStr := log.ElideAddr(socksReq.Target)
// Deal with arguments.
args, err := f.ParseArgs(&socksReq.Args)
if err != nil {
log.Errorf("%s(%s) - invalid arguments: %s", name, addrStr, err)
socksReq.Reply(socks5.ReplyGeneralFailure)
return
}
// Obtain the proxy dialer if any, and create the outgoing TCP connection.
dialFn := proxy.Direct.Dial
if proxyURI != nil {
dialer, err := proxy.FromURL(proxyURI, proxy.Direct)
if err != nil {
// This should basically never happen, since config protocol
// verifies this.
log.Errorf("%s(%s) - failed to obtain proxy dialer: %s", name, addrStr, log.ElideError(err))
socksReq.Reply(socks5.ReplyGeneralFailure)
return
}
dialFn = dialer.Dial
}
remote, err := f.Dial("tcp", socksReq.Target, dialFn, args)
if err != nil {
log.Errorf("%s(%s) - outgoing connection failed: %s", name, addrStr, log.ElideError(err))
socksReq.Reply(socks5.ErrorToReplyCode(err))
return
}
defer remote.Close()
err = socksReq.Reply(socks5.ReplySucceeded)
if err != nil {
log.Errorf("%s(%s) - SOCKS reply failed: %s", name, addrStr, log.ElideError(err))
return
}
if err = copyLoop(conn, remote); err != nil {
log.Warnf("%s(%s) - closed connection: %s", name, addrStr, log.ElideError(err))
} else {
log.Infof("%s(%s) - closed connection", name, addrStr)
}
return
}
func clientHandler(f base.ClientFactory, conn net.Conn, proxyURI *url.URL, linkInfo LinkInfo) {
defer conn.Close()
termMon.onHandlerStart()
defer termMon.onHandlerFinish()
name := f.Transport().Name()
fakeReq, err := parseClientParameters(strings.Replace(linkInfo.PtArgs, ",", ";", -1))
if err != nil {
log.Errorf("%s - client failed socks handshake: %s", name, err)
return
}
addrStr := log.ElideAddr(linkInfo.ServerAddr)
// Deal with arguments.
args, err := f.ParseArgs(&fakeReq)
if err != nil {
log.Errorf("%s(%s) - invalid arguments: %s", name, addrStr, err)
return
}
// Obtain the proxy dialer if any, and create the outgoing TCP connection.
dialFn := proxy.Direct.Dial
if proxyURI != nil {
dialer, err := proxy.FromURL(proxyURI, proxy.Direct)
if err != nil {
// This should basically never happen, since config protocol
// verifies this.
log.Errorf("%s(%s) - failed to obtain proxy dialer: %s", name, addrStr, log.ElideError(err))
return
}
dialFn = dialer.Dial
}
remote, er := f.Dial("tcp", linkInfo.ServerAddr, dialFn, args)
if er != nil {
log.Errorf("%s(%s) - outgoing connection failed: %s", name, addrStr, log.ElideError(er))
return
}
defer remote.Close()
if err = copyLoop(conn, remote); err != nil {
log.Warnf("%s(%s) - closed connection: %s", name, addrStr, log.ElideError(err))
} else {
log.Infof("%s(%s) - closed connection", name, addrStr)
}
return
}