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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "remoting/jingle_glue/jingle_info_request.h"
      6 
      7 #include "base/bind.h"
      8 #include "base/message_loop/message_loop.h"
      9 #include "base/stl_util.h"
     10 #include "base/strings/string_number_conversions.h"
     11 #include "base/time/time.h"
     12 #include "net/base/net_util.h"
     13 #include "remoting/jingle_glue/iq_sender.h"
     14 #include "third_party/libjingle/source/talk/base/socketaddress.h"
     15 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
     16 #include "third_party/libjingle/source/talk/xmpp/constants.h"
     17 
     18 namespace remoting {
     19 
     20 const int kRequestTimeoutSeconds = 5;
     21 
     22 JingleInfoRequest::JingleInfoRequest(SignalStrategy* signal_strategy)
     23     : iq_sender_(signal_strategy) {
     24 }
     25 
     26 JingleInfoRequest::~JingleInfoRequest() {}
     27 
     28 void JingleInfoRequest::Send(const OnJingleInfoCallback& callback) {
     29   on_jingle_info_cb_ = callback;
     30   scoped_ptr<buzz::XmlElement> iq_body(
     31       new buzz::XmlElement(buzz::QN_JINGLE_INFO_QUERY, true));
     32   request_ = iq_sender_.SendIq(
     33       buzz::STR_GET, buzz::STR_EMPTY, iq_body.Pass(),
     34       base::Bind(&JingleInfoRequest::OnResponse, base::Unretained(this)));
     35   if (!request_) {
     36     // If we failed to send IqRequest it means that SignalStrategy is
     37     // disconnected. Notify the caller.
     38     std::vector<talk_base::SocketAddress> stun_hosts;
     39     std::vector<std::string> relay_hosts;
     40     std::string relay_token;
     41     on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
     42     return;
     43   }
     44   request_->SetTimeout(base::TimeDelta::FromSeconds(kRequestTimeoutSeconds));
     45 }
     46 
     47 void JingleInfoRequest::OnResponse(IqRequest* request,
     48                                    const buzz::XmlElement* stanza) {
     49   std::vector<talk_base::SocketAddress> stun_hosts;
     50   std::vector<std::string> relay_hosts;
     51   std::string relay_token;
     52 
     53   if (!stanza) {
     54     LOG(WARNING) << "Jingle info request has timed out.";
     55     on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
     56     return;
     57   }
     58 
     59   const buzz::XmlElement* query =
     60       stanza->FirstNamed(buzz::QN_JINGLE_INFO_QUERY);
     61   if (query == NULL) {
     62     LOG(WARNING) << "No Jingle info found in Jingle Info query response."
     63                  << stanza->Str();
     64     on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
     65     return;
     66   }
     67 
     68   const buzz::XmlElement* stun = query->FirstNamed(buzz::QN_JINGLE_INFO_STUN);
     69   if (stun) {
     70     for (const buzz::XmlElement* server =
     71          stun->FirstNamed(buzz::QN_JINGLE_INFO_SERVER);
     72          server != NULL;
     73          server = server->NextNamed(buzz::QN_JINGLE_INFO_SERVER)) {
     74       std::string host = server->Attr(buzz::QN_JINGLE_INFO_HOST);
     75       std::string port_str = server->Attr(buzz::QN_JINGLE_INFO_UDP);
     76       if (host != buzz::STR_EMPTY && port_str != buzz::STR_EMPTY) {
     77         int port;
     78         if (!base::StringToInt(port_str, &port)) {
     79           LOG(WARNING) << "Unable to parse port in stanza" << stanza->Str();
     80           continue;
     81         }
     82 
     83         stun_hosts.push_back(talk_base::SocketAddress(host, port));
     84       }
     85     }
     86   }
     87 
     88   const buzz::XmlElement* relay = query->FirstNamed(buzz::QN_JINGLE_INFO_RELAY);
     89   if (relay) {
     90     relay_token = relay->TextNamed(buzz::QN_JINGLE_INFO_TOKEN);
     91     for (const buzz::XmlElement* server =
     92          relay->FirstNamed(buzz::QN_JINGLE_INFO_SERVER);
     93          server != NULL;
     94          server = server->NextNamed(buzz::QN_JINGLE_INFO_SERVER)) {
     95       std::string host = server->Attr(buzz::QN_JINGLE_INFO_HOST);
     96       if (host != buzz::STR_EMPTY)
     97         relay_hosts.push_back(host);
     98     }
     99   }
    100 
    101   on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
    102 }
    103 
    104 }  // namespace remoting
    105