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)
41namespace cricket {
42
43RawTransport::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
50RawTransport::~RawTransport() {
51  DestroyAllChannels();
52}
53
54bool 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
76bool 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
96bool 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
117TransportChannelImpl* 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
124void RawTransport::DestroyTransportChannel(TransportChannelImpl* channel) {
125  delete channel;
126}
127
128}  // namespace cricket
129#endif  // defined(FEATURE_ENABLE_PSTN)
130