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      1 /*
      2  * libjingle
      3  * Copyright 2004--2006, 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/xmpptask.h"
     29 #include "talk/xmpp/xmppclient.h"
     30 #include "talk/xmpp/xmppengine.h"
     31 #include "talk/xmpp/constants.h"
     32 
     33 namespace buzz {
     34 
     35 XmppClientInterface::XmppClientInterface() {
     36 }
     37 
     38 XmppClientInterface::~XmppClientInterface() {
     39 }
     40 
     41 XmppTask::XmppTask(XmppTaskParentInterface* parent,
     42                    XmppEngine::HandlerLevel level)
     43     : XmppTaskBase(parent), stopped_(false) {
     44 #ifdef _DEBUG
     45   debug_force_timeout_ = false;
     46 #endif
     47 
     48   id_ = GetClient()->NextId();
     49   GetClient()->AddXmppTask(this, level);
     50   GetClient()->SignalDisconnected.connect(this, &XmppTask::OnDisconnect);
     51 }
     52 
     53 XmppTask::~XmppTask() {
     54   StopImpl();
     55 }
     56 
     57 void XmppTask::StopImpl() {
     58   while (NextStanza() != NULL) {}
     59   if (!stopped_) {
     60     GetClient()->RemoveXmppTask(this);
     61     GetClient()->SignalDisconnected.disconnect(this);
     62     stopped_ = true;
     63   }
     64 }
     65 
     66 XmppReturnStatus XmppTask::SendStanza(const XmlElement* stanza) {
     67   if (stopped_)
     68     return XMPP_RETURN_BADSTATE;
     69   return GetClient()->SendStanza(stanza);
     70 }
     71 
     72 XmppReturnStatus XmppTask::SendStanzaError(const XmlElement* element_original,
     73                                            XmppStanzaError code,
     74                                            const std::string& text) {
     75   if (stopped_)
     76     return XMPP_RETURN_BADSTATE;
     77   return GetClient()->SendStanzaError(element_original, code, text);
     78 }
     79 
     80 void XmppTask::Stop() {
     81   StopImpl();
     82   Task::Stop();
     83 }
     84 
     85 void XmppTask::OnDisconnect() {
     86   Error();
     87 }
     88 
     89 void XmppTask::QueueStanza(const XmlElement* stanza) {
     90 #ifdef _DEBUG
     91   if (debug_force_timeout_)
     92     return;
     93 #endif
     94 
     95   stanza_queue_.push_back(new XmlElement(*stanza));
     96   Wake();
     97 }
     98 
     99 const XmlElement* XmppTask::NextStanza() {
    100   XmlElement* result = NULL;
    101   if (!stanza_queue_.empty()) {
    102     result = stanza_queue_.front();
    103     stanza_queue_.pop_front();
    104   }
    105   next_stanza_.reset(result);
    106   return result;
    107 }
    108 
    109 XmlElement* XmppTask::MakeIq(const std::string& type,
    110                              const buzz::Jid& to,
    111                              const std::string& id) {
    112   XmlElement* result = new XmlElement(QN_IQ);
    113   if (!type.empty())
    114     result->AddAttr(QN_TYPE, type);
    115   if (!to.IsEmpty())
    116     result->AddAttr(QN_TO, to.Str());
    117   if (!id.empty())
    118     result->AddAttr(QN_ID, id);
    119   return result;
    120 }
    121 
    122 XmlElement* XmppTask::MakeIqResult(const XmlElement * query) {
    123   XmlElement* result = new XmlElement(QN_IQ);
    124   result->AddAttr(QN_TYPE, STR_RESULT);
    125   if (query->HasAttr(QN_FROM)) {
    126     result->AddAttr(QN_TO, query->Attr(QN_FROM));
    127   }
    128   result->AddAttr(QN_ID, query->Attr(QN_ID));
    129   return result;
    130 }
    131 
    132 bool XmppTask::MatchResponseIq(const XmlElement* stanza,
    133                                const Jid& to,
    134                                const std::string& id) {
    135   if (stanza->Name() != QN_IQ)
    136     return false;
    137 
    138   if (stanza->Attr(QN_ID) != id)
    139     return false;
    140 
    141   return MatchStanzaFrom(stanza, to);
    142 }
    143 
    144 bool XmppTask::MatchStanzaFrom(const XmlElement* stanza,
    145                                const Jid& to) {
    146   Jid from(stanza->Attr(QN_FROM));
    147   if (from == to)
    148     return true;
    149 
    150   // We address the server as "", check if we are doing so here.
    151   if (!to.IsEmpty())
    152     return false;
    153 
    154   // It is legal for the server to identify itself with "domain" or
    155   // "myself@domain"
    156   Jid me = GetClient()->jid();
    157   return (from == Jid(me.domain())) || (from == me.BareJid());
    158 }
    159 
    160 bool XmppTask::MatchRequestIq(const XmlElement* stanza,
    161                               const std::string& type,
    162                               const QName& qn) {
    163   if (stanza->Name() != QN_IQ)
    164     return false;
    165 
    166   if (stanza->Attr(QN_TYPE) != type)
    167     return false;
    168 
    169   if (stanza->FirstNamed(qn) == NULL)
    170     return false;
    171 
    172   return true;
    173 }
    174 
    175 }
    176