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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/rawtransport.h"
     31 #include "talk/base/common.h"
     32 #include "talk/p2p/base/constants.h"
     33 #include "talk/p2p/base/parsing.h"
     34 #include "talk/p2p/base/sessionmanager.h"
     35 #include "talk/p2p/base/rawtransportchannel.h"
     36 #include "talk/xmllite/qname.h"
     37 #include "talk/xmllite/xmlelement.h"
     38 #include "talk/xmpp/constants.h"
     39 
     40 #if defined(FEATURE_ENABLE_PSTN)
     41 namespace cricket {
     42 
     43 RawTransport::RawTransport(talk_base::Thread* signaling_thread,
     44                            talk_base::Thread* worker_thread,
     45                            PortAllocator* allocator)
     46     : Transport(signaling_thread, worker_thread,
     47                 NS_GINGLE_RAW, allocator) {
     48 }
     49 
     50 RawTransport::~RawTransport() {
     51   DestroyAllChannels();
     52 }
     53 
     54 bool RawTransport::ParseCandidates(SignalingProtocol protocol,
     55                                    const buzz::XmlElement* elem,
     56                                    Candidates* candidates,
     57                                    ParseError* error) {
     58   ASSERT(elem->FirstChild() == NULL);
     59   for (const buzz::XmlElement* cand_elem = elem->FirstElement();
     60        cand_elem != NULL;
     61        cand_elem = cand_elem->NextElement()) {
     62     if (cand_elem->Name() == QN_GINGLE_RAW_CHANNEL) {
     63       talk_base::SocketAddress addr;
     64       if (!ParseRawAddress(cand_elem, &addr, error))
     65         return false;
     66 
     67       Candidate candidate;
     68       candidate.set_name(cand_elem->Attr(buzz::QN_NAME));
     69       candidate.set_address(addr);
     70       candidates->push_back(candidate);
     71     }
     72   }
     73   return true;
     74 }
     75 
     76 bool RawTransport::WriteCandidates(SignalingProtocol protocol,
     77                                    const Candidates& candidates,
     78                                    XmlElements* candidate_elems,
     79                                    WriteError* error) {
     80   for (std::vector<Candidate>::const_iterator
     81        cand = candidates.begin();
     82        cand != candidates.end();
     83        ++cand) {
     84     ASSERT(cand->protocol() == "udp");
     85     talk_base::SocketAddress addr = cand->address();
     86 
     87     buzz::XmlElement* elem = new buzz::XmlElement(QN_GINGLE_RAW_CHANNEL);
     88     elem->SetAttr(buzz::QN_NAME, type());
     89     elem->SetAttr(QN_ADDRESS, addr.IPAsString());
     90     elem->SetAttr(QN_PORT, addr.PortAsString());
     91     candidate_elems->push_back(elem);
     92   }
     93   return true;
     94 }
     95 
     96 bool RawTransport::ParseRawAddress(const buzz::XmlElement* elem,
     97                                    talk_base::SocketAddress* addr,
     98                                    ParseError* error) {
     99   // Make sure the required attributes exist
    100   if (!elem->HasAttr(buzz::QN_NAME) ||
    101       !elem->HasAttr(QN_ADDRESS) ||
    102       !elem->HasAttr(QN_PORT)) {
    103     return BadParse("channel missing required attribute", error);
    104   }
    105 
    106   // Make sure the channel named actually exists.
    107   if (!HasChannel(elem->Attr(buzz::QN_NAME)))
    108     return BadParse("channel named does not exist", error);
    109 
    110   // Parse the address.
    111   if (!ParseAddress(elem, QN_ADDRESS, QN_PORT, addr, error))
    112     return false;
    113 
    114   return true;
    115 }
    116 
    117 TransportChannelImpl* RawTransport::CreateTransportChannel(
    118     const std::string& name, const std::string& content_type) {
    119   return new RawTransportChannel(name, content_type, this,
    120                                  worker_thread(),
    121                                  port_allocator());
    122 }
    123 
    124 void RawTransport::DestroyTransportChannel(TransportChannelImpl* channel) {
    125   delete channel;
    126 }
    127 
    128 }  // namespace cricket
    129 #endif  // defined(FEATURE_ENABLE_PSTN)
    130