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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, 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 <string>
     29 #include <vector>
     30 #include "talk/p2p/base/constants.h"
     31 #include "talk/p2p/base/parsing.h"
     32 #include "talk/p2p/base/rawtransport.h"
     33 #include "talk/p2p/base/rawtransportchannel.h"
     34 #include "talk/p2p/base/sessionmanager.h"
     35 #include "webrtc/libjingle/xmllite/qname.h"
     36 #include "webrtc/libjingle/xmllite/xmlelement.h"
     37 #include "talk/xmpp/constants.h"
     38 #include "webrtc/base/common.h"
     39 
     40 #if defined(FEATURE_ENABLE_PSTN)
     41 namespace cricket {
     42 
     43 RawTransport::RawTransport(rtc::Thread* signaling_thread,
     44                            rtc::Thread* worker_thread,
     45                            const std::string& content_name,
     46                            PortAllocator* allocator)
     47     : Transport(signaling_thread, worker_thread,
     48                 content_name, NS_GINGLE_RAW, allocator) {
     49 }
     50 
     51 RawTransport::~RawTransport() {
     52   DestroyAllChannels();
     53 }
     54 
     55 bool RawTransport::ParseCandidates(SignalingProtocol protocol,
     56                                    const buzz::XmlElement* elem,
     57                                    const CandidateTranslator* translator,
     58                                    Candidates* candidates,
     59                                    ParseError* error) {
     60   for (const buzz::XmlElement* cand_elem = elem->FirstElement();
     61        cand_elem != NULL;
     62        cand_elem = cand_elem->NextElement()) {
     63     if (cand_elem->Name() == QN_GINGLE_RAW_CHANNEL) {
     64       if (!cand_elem->HasAttr(buzz::QN_NAME)) {
     65         return BadParse("no channel name given", error);
     66       }
     67       if (type() != cand_elem->Attr(buzz::QN_NAME)) {
     68         return BadParse("channel named does not exist", error);
     69       }
     70       rtc::SocketAddress addr;
     71       if (!ParseRawAddress(cand_elem, &addr, error))
     72         return false;
     73 
     74       Candidate candidate;
     75       candidate.set_component(1);
     76       candidate.set_address(addr);
     77       candidates->push_back(candidate);
     78     }
     79   }
     80   return true;
     81 }
     82 
     83 bool RawTransport::WriteCandidates(SignalingProtocol protocol,
     84                                    const Candidates& candidates,
     85                                    const CandidateTranslator* translator,
     86                                    XmlElements* candidate_elems,
     87                                    WriteError* error) {
     88   for (std::vector<Candidate>::const_iterator
     89        cand = candidates.begin();
     90        cand != candidates.end();
     91        ++cand) {
     92     ASSERT(cand->component() == 1);
     93     ASSERT(cand->protocol() == "udp");
     94     rtc::SocketAddress addr = cand->address();
     95 
     96     buzz::XmlElement* elem = new buzz::XmlElement(QN_GINGLE_RAW_CHANNEL);
     97     elem->SetAttr(buzz::QN_NAME, type());
     98     elem->SetAttr(QN_ADDRESS, addr.ipaddr().ToString());
     99     elem->SetAttr(QN_PORT, addr.PortAsString());
    100     candidate_elems->push_back(elem);
    101   }
    102   return true;
    103 }
    104 
    105 bool RawTransport::ParseRawAddress(const buzz::XmlElement* elem,
    106                                    rtc::SocketAddress* addr,
    107                                    ParseError* error) {
    108   // Make sure the required attributes exist
    109   if (!elem->HasAttr(QN_ADDRESS) ||
    110       !elem->HasAttr(QN_PORT)) {
    111     return BadParse("channel missing required attribute", error);
    112   }
    113 
    114   // Parse the address.
    115   if (!ParseAddress(elem, QN_ADDRESS, QN_PORT, addr, error))
    116     return false;
    117 
    118   return true;
    119 }
    120 
    121 TransportChannelImpl* RawTransport::CreateTransportChannel(int component) {
    122   return new RawTransportChannel(content_name(), component, this,
    123                                  worker_thread(),
    124                                  port_allocator());
    125 }
    126 
    127 void RawTransport::DestroyTransportChannel(TransportChannelImpl* channel) {
    128   delete channel;
    129 }
    130 
    131 }  // namespace cricket
    132 #endif  // defined(FEATURE_ENABLE_PSTN)
    133