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 "talk/p2p/base/portallocator.h"
29
30#include "talk/p2p/base/portallocatorsessionproxy.h"
31
32namespace cricket {
33
34PortAllocatorSession::PortAllocatorSession(const std::string& content_name,
35                                           int component,
36                                           const std::string& ice_ufrag,
37                                           const std::string& ice_pwd,
38                                           uint32 flags)
39    : content_name_(content_name),
40      component_(component),
41      flags_(flags),
42      generation_(0),
43      // If PORTALLOCATOR_ENABLE_SHARED_UFRAG flag is not enabled, ignore the
44      // incoming ufrag and pwd, which will cause each Port to generate one
45      // by itself.
46      username_(flags_ & PORTALLOCATOR_ENABLE_SHARED_UFRAG ? ice_ufrag : ""),
47      password_(flags_ & PORTALLOCATOR_ENABLE_SHARED_UFRAG ? ice_pwd : "") {
48}
49
50PortAllocator::~PortAllocator() {
51  for (SessionMuxerMap::iterator iter = muxers_.begin();
52       iter != muxers_.end(); ++iter) {
53    delete iter->second;
54  }
55}
56
57PortAllocatorSession* PortAllocator::CreateSession(
58    const std::string& sid,
59    const std::string& content_name,
60    int component,
61    const std::string& ice_ufrag,
62    const std::string& ice_pwd) {
63  if (flags_ & PORTALLOCATOR_ENABLE_BUNDLE) {
64    // If we just use |sid| as key in identifying PortAllocatorSessionMuxer,
65    // ICE restart will not result in different candidates, as |sid| will
66    // be same. To yield different candiates we are using combination of
67    // |ice_ufrag| and |ice_pwd|.
68    // Ideally |ice_ufrag| and |ice_pwd| should change together, but
69    // there can be instances where only ice_pwd will be changed.
70    std::string key_str = ice_ufrag + ":" + ice_pwd;
71    PortAllocatorSessionMuxer* muxer = GetSessionMuxer(key_str);
72    if (!muxer) {
73      PortAllocatorSession* session_impl = CreateSessionInternal(
74          content_name, component, ice_ufrag, ice_pwd);
75      // Create PortAllocatorSessionMuxer object for |session_impl|.
76      muxer = new PortAllocatorSessionMuxer(session_impl);
77      muxer->SignalDestroyed.connect(
78          this, &PortAllocator::OnSessionMuxerDestroyed);
79      // Add PortAllocatorSession to the map.
80      muxers_[key_str] = muxer;
81    }
82    PortAllocatorSessionProxy* proxy =
83        new PortAllocatorSessionProxy(content_name, component, flags_);
84    muxer->RegisterSessionProxy(proxy);
85    return proxy;
86  }
87  return CreateSessionInternal(content_name, component, ice_ufrag, ice_pwd);
88}
89
90PortAllocatorSessionMuxer* PortAllocator::GetSessionMuxer(
91    const std::string& key) const {
92  SessionMuxerMap::const_iterator iter = muxers_.find(key);
93  if (iter != muxers_.end())
94    return iter->second;
95  return NULL;
96}
97
98void PortAllocator::OnSessionMuxerDestroyed(
99    PortAllocatorSessionMuxer* session) {
100  SessionMuxerMap::iterator iter;
101  for (iter = muxers_.begin(); iter != muxers_.end(); ++iter) {
102    if (iter->second == session)
103      break;
104  }
105  if (iter != muxers_.end())
106    muxers_.erase(iter);
107}
108
109}  // namespace cricket
110