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      1 /*
      2  * libjingle
      3  * Copyright 2010, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/xmpp/jingleinfotask.h"
     29 
     30 #include "talk/base/socketaddress.h"
     31 #include "talk/xmpp/constants.h"
     32 #include "talk/xmpp/xmppclient.h"
     33 #include "talk/xmpp/xmpptask.h"
     34 
     35 namespace buzz {
     36 
     37 class JingleInfoTask::JingleInfoGetTask : public XmppTask {
     38  public:
     39   explicit JingleInfoGetTask(XmppTaskParentInterface* parent)
     40       : XmppTask(parent, XmppEngine::HL_SINGLE),
     41         done_(false) {}
     42 
     43   virtual int ProcessStart() {
     44     talk_base::scoped_ptr<XmlElement> get(
     45         MakeIq(STR_GET, Jid(), task_id()));
     46     get->AddElement(new XmlElement(QN_JINGLE_INFO_QUERY, true));
     47     if (SendStanza(get.get()) != XMPP_RETURN_OK) {
     48       return STATE_ERROR;
     49     }
     50     return STATE_RESPONSE;
     51   }
     52   virtual int ProcessResponse() {
     53     if (done_)
     54       return STATE_DONE;
     55     return STATE_BLOCKED;
     56   }
     57 
     58  protected:
     59   virtual bool HandleStanza(const XmlElement * stanza) {
     60     if (!MatchResponseIq(stanza, Jid(), task_id()))
     61       return false;
     62 
     63     if (stanza->Attr(QN_TYPE) != STR_RESULT)
     64       return false;
     65 
     66     // Queue the stanza with the parent so these don't get handled out of order
     67     JingleInfoTask* parent = static_cast<JingleInfoTask*>(GetParent());
     68     parent->QueueStanza(stanza);
     69 
     70     // Wake ourselves so we can go into the done state
     71     done_ = true;
     72     Wake();
     73     return true;
     74   }
     75 
     76   bool done_;
     77 };
     78 
     79 
     80 void JingleInfoTask::RefreshJingleInfoNow() {
     81   JingleInfoGetTask* get_task = new JingleInfoGetTask(this);
     82   get_task->Start();
     83 }
     84 
     85 bool
     86 JingleInfoTask::HandleStanza(const XmlElement * stanza) {
     87   if (!MatchRequestIq(stanza, "set", QN_JINGLE_INFO_QUERY))
     88     return false;
     89 
     90   // only respect relay push from the server
     91   Jid from(stanza->Attr(QN_FROM));
     92   if (!from.IsEmpty() &&
     93       !from.BareEquals(GetClient()->jid()) &&
     94       from != Jid(GetClient()->jid().domain()))
     95     return false;
     96 
     97   QueueStanza(stanza);
     98   return true;
     99 }
    100 
    101 int
    102 JingleInfoTask::ProcessStart() {
    103   std::vector<std::string> relay_hosts;
    104   std::vector<talk_base::SocketAddress> stun_hosts;
    105   std::string relay_token;
    106   const XmlElement * stanza = NextStanza();
    107   if (stanza == NULL)
    108     return STATE_BLOCKED;
    109   const XmlElement * query = stanza->FirstNamed(QN_JINGLE_INFO_QUERY);
    110   if (query == NULL)
    111     return STATE_START;
    112   const XmlElement *stun = query->FirstNamed(QN_JINGLE_INFO_STUN);
    113   if (stun) {
    114     for (const XmlElement *server = stun->FirstNamed(QN_JINGLE_INFO_SERVER);
    115          server != NULL; server = server->NextNamed(QN_JINGLE_INFO_SERVER)) {
    116       std::string host = server->Attr(QN_JINGLE_INFO_HOST);
    117       std::string port = server->Attr(QN_JINGLE_INFO_UDP);
    118       if (host != STR_EMPTY && host != STR_EMPTY) {
    119         stun_hosts.push_back(talk_base::SocketAddress(host, atoi(port.c_str())));
    120       }
    121     }
    122   }
    123 
    124   const XmlElement *relay = query->FirstNamed(QN_JINGLE_INFO_RELAY);
    125   if (relay) {
    126     relay_token = relay->TextNamed(QN_JINGLE_INFO_TOKEN);
    127     for (const XmlElement *server = relay->FirstNamed(QN_JINGLE_INFO_SERVER);
    128          server != NULL; server = server->NextNamed(QN_JINGLE_INFO_SERVER)) {
    129       std::string host = server->Attr(QN_JINGLE_INFO_HOST);
    130       if (host != STR_EMPTY) {
    131         relay_hosts.push_back(host);
    132       }
    133     }
    134   }
    135   SignalJingleInfo(relay_token, relay_hosts, stun_hosts);
    136   return STATE_START;
    137 }
    138 }
    139