webrtc/talk/p2p/base/sessionmanager.cc

327 lines
11 KiB
C++

/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "talk/p2p/base/sessionmanager.h"
#include "talk/p2p/base/constants.h"
#include "talk/p2p/base/session.h"
#include "talk/p2p/base/sessionmessages.h"
#include "talk/xmpp/constants.h"
#include "talk/xmpp/jid.h"
#include "webrtc/base/common.h"
#include "webrtc/base/helpers.h"
#include "webrtc/base/logging.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/base/stringencode.h"
namespace cricket {
SessionManager::SessionManager(PortAllocator *allocator,
rtc::Thread *worker) {
allocator_ = allocator;
signaling_thread_ = rtc::Thread::Current();
if (worker == NULL) {
worker_thread_ = rtc::Thread::Current();
} else {
worker_thread_ = worker;
}
timeout_ = 50;
}
SessionManager::~SessionManager() {
// Note: Session::Terminate occurs asynchronously, so it's too late to
// delete them now. They better be all gone.
ASSERT(session_map_.empty());
// TerminateAll();
SignalDestroyed();
}
void SessionManager::AddClient(const std::string& content_type,
SessionClient* client) {
ASSERT(client_map_.find(content_type) == client_map_.end());
client_map_[content_type] = client;
}
void SessionManager::RemoveClient(const std::string& content_type) {
ClientMap::iterator iter = client_map_.find(content_type);
ASSERT(iter != client_map_.end());
client_map_.erase(iter);
}
SessionClient* SessionManager::GetClient(const std::string& content_type) {
ClientMap::iterator iter = client_map_.find(content_type);
return (iter != client_map_.end()) ? iter->second : NULL;
}
Session* SessionManager::CreateSession(const std::string& local_name,
const std::string& content_type) {
std::string id;
return CreateSession(id, local_name, content_type);
}
Session* SessionManager::CreateSession(const std::string& id,
const std::string& local_name,
const std::string& content_type) {
std::string sid =
id.empty() ? rtc::ToString(rtc::CreateRandomId64()) : id;
return CreateSession(local_name, local_name, sid, content_type, false);
}
Session* SessionManager::CreateSession(
const std::string& local_name, const std::string& initiator_name,
const std::string& sid, const std::string& content_type,
bool received_initiate) {
SessionClient* client = GetClient(content_type);
ASSERT(client != NULL);
Session* session = new Session(this, local_name, initiator_name,
sid, content_type, client);
session->SetIdentity(transport_desc_factory_.identity());
session_map_[session->id()] = session;
session->SignalRequestSignaling.connect(
this, &SessionManager::OnRequestSignaling);
session->SignalOutgoingMessage.connect(
this, &SessionManager::OnOutgoingMessage);
session->SignalErrorMessage.connect(this, &SessionManager::OnErrorMessage);
SignalSessionCreate(session, received_initiate);
session->client()->OnSessionCreate(session, received_initiate);
return session;
}
void SessionManager::DestroySession(Session* session) {
if (session != NULL) {
SessionMap::iterator it = session_map_.find(session->id());
if (it != session_map_.end()) {
SignalSessionDestroy(session);
session->client()->OnSessionDestroy(session);
session_map_.erase(it);
delete session;
}
}
}
Session* SessionManager::GetSession(const std::string& sid) {
SessionMap::iterator it = session_map_.find(sid);
if (it != session_map_.end())
return it->second;
return NULL;
}
void SessionManager::TerminateAll() {
while (session_map_.begin() != session_map_.end()) {
Session* session = session_map_.begin()->second;
session->Terminate();
}
}
bool SessionManager::IsSessionMessage(const buzz::XmlElement* stanza) {
return cricket::IsSessionMessage(stanza);
}
Session* SessionManager::FindSession(const std::string& sid,
const std::string& remote_name) {
SessionMap::iterator iter = session_map_.find(sid);
if (iter == session_map_.end())
return NULL;
Session* session = iter->second;
if (buzz::Jid(remote_name) != buzz::Jid(session->remote_name()))
return NULL;
return session;
}
void SessionManager::OnIncomingMessage(const buzz::XmlElement* stanza) {
SessionMessage msg;
ParseError error;
if (!ParseSessionMessage(stanza, &msg, &error)) {
SendErrorMessage(stanza, buzz::QN_STANZA_BAD_REQUEST, "modify",
error.text, NULL);
return;
}
Session* session = FindSession(msg.sid, msg.from);
if (session) {
session->OnIncomingMessage(msg);
return;
}
if (msg.type != ACTION_SESSION_INITIATE) {
SendErrorMessage(stanza, buzz::QN_STANZA_BAD_REQUEST, "modify",
"unknown session", NULL);
return;
}
std::string content_type;
if (!ParseContentType(msg.protocol, msg.action_elem,
&content_type, &error)) {
SendErrorMessage(stanza, buzz::QN_STANZA_BAD_REQUEST, "modify",
error.text, NULL);
return;
}
if (!GetClient(content_type)) {
SendErrorMessage(stanza, buzz::QN_STANZA_BAD_REQUEST, "modify",
"unknown content type: " + content_type, NULL);
return;
}
session = CreateSession(msg.to, msg.initiator, msg.sid,
content_type, true);
session->OnIncomingMessage(msg);
}
void SessionManager::OnIncomingResponse(const buzz::XmlElement* orig_stanza,
const buzz::XmlElement* response_stanza) {
if (orig_stanza == NULL || response_stanza == NULL) {
return;
}
SessionMessage msg;
ParseError error;
if (!ParseSessionMessage(orig_stanza, &msg, &error)) {
LOG(LS_WARNING) << "Error parsing incoming response: " << error.text
<< ":" << orig_stanza;
return;
}
Session* session = FindSession(msg.sid, msg.to);
if (!session) {
// Also try the QN_FROM in the response stanza, in case we sent the request
// to a bare JID but got the response from a full JID.
std::string ack_from = response_stanza->Attr(buzz::QN_FROM);
session = FindSession(msg.sid, ack_from);
}
if (session) {
session->OnIncomingResponse(orig_stanza, response_stanza, msg);
}
}
void SessionManager::OnFailedSend(const buzz::XmlElement* orig_stanza,
const buzz::XmlElement* error_stanza) {
SessionMessage msg;
ParseError error;
if (!ParseSessionMessage(orig_stanza, &msg, &error)) {
return; // TODO: log somewhere?
}
Session* session = FindSession(msg.sid, msg.to);
if (session) {
rtc::scoped_ptr<buzz::XmlElement> synthetic_error;
if (!error_stanza) {
// A failed send is semantically equivalent to an error response, so we
// can just turn the former into the latter.
synthetic_error.reset(
CreateErrorMessage(orig_stanza, buzz::QN_STANZA_ITEM_NOT_FOUND,
"cancel", "Recipient did not respond", NULL));
error_stanza = synthetic_error.get();
}
session->OnFailedSend(orig_stanza, error_stanza);
}
}
void SessionManager::SendErrorMessage(const buzz::XmlElement* stanza,
const buzz::QName& name,
const std::string& type,
const std::string& text,
const buzz::XmlElement* extra_info) {
rtc::scoped_ptr<buzz::XmlElement> msg(
CreateErrorMessage(stanza, name, type, text, extra_info));
SignalOutgoingMessage(this, msg.get());
}
buzz::XmlElement* SessionManager::CreateErrorMessage(
const buzz::XmlElement* stanza,
const buzz::QName& name,
const std::string& type,
const std::string& text,
const buzz::XmlElement* extra_info) {
buzz::XmlElement* iq = new buzz::XmlElement(buzz::QN_IQ);
iq->SetAttr(buzz::QN_TO, stanza->Attr(buzz::QN_FROM));
iq->SetAttr(buzz::QN_ID, stanza->Attr(buzz::QN_ID));
iq->SetAttr(buzz::QN_TYPE, "error");
CopyXmlChildren(stanza, iq);
buzz::XmlElement* error = new buzz::XmlElement(buzz::QN_ERROR);
error->SetAttr(buzz::QN_TYPE, type);
iq->AddElement(error);
// If the error name is not in the standard namespace, we have to first add
// some error from that namespace.
if (name.Namespace() != buzz::NS_STANZA) {
error->AddElement(
new buzz::XmlElement(buzz::QN_STANZA_UNDEFINED_CONDITION));
}
error->AddElement(new buzz::XmlElement(name));
if (extra_info)
error->AddElement(new buzz::XmlElement(*extra_info));
if (text.size() > 0) {
// It's okay to always use English here. This text is for debugging
// purposes only.
buzz::XmlElement* text_elem = new buzz::XmlElement(buzz::QN_STANZA_TEXT);
text_elem->SetAttr(buzz::QN_XML_LANG, "en");
text_elem->SetBodyText(text);
error->AddElement(text_elem);
}
// TODO: Should we include error codes as well for SIP compatibility?
return iq;
}
void SessionManager::OnOutgoingMessage(Session* session,
const buzz::XmlElement* stanza) {
SignalOutgoingMessage(this, stanza);
}
void SessionManager::OnErrorMessage(BaseSession* session,
const buzz::XmlElement* stanza,
const buzz::QName& name,
const std::string& type,
const std::string& text,
const buzz::XmlElement* extra_info) {
SendErrorMessage(stanza, name, type, text, extra_info);
}
void SessionManager::OnSignalingReady() {
for (SessionMap::iterator it = session_map_.begin();
it != session_map_.end();
++it) {
it->second->OnSignalingReady();
}
}
void SessionManager::OnRequestSignaling(Session* session) {
SignalRequestSignaling();
}
} // namespace cricket