28100cb388
BUG=N/A TBR=niklas.enbom@webrtc.org Review URL: https://webrtc-codereview.appspot.com/29829004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7472 4adac7df-926f-26a2-2b94-8c16560cd09d
264 lines
9.5 KiB
C++
264 lines
9.5 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "talk/p2p/base/p2ptransport.h"
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#include <string>
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#include <vector>
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#include "talk/p2p/base/constants.h"
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#include "talk/p2p/base/p2ptransportchannel.h"
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#include "talk/p2p/base/parsing.h"
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#include "talk/p2p/base/sessionmanager.h"
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#include "talk/p2p/base/sessionmessages.h"
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#include "webrtc/libjingle/xmllite/qname.h"
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#include "webrtc/libjingle/xmllite/xmlelement.h"
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#include "talk/xmpp/constants.h"
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#include "webrtc/base/base64.h"
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#include "webrtc/base/common.h"
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#include "webrtc/base/stringencode.h"
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#include "webrtc/base/stringutils.h"
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namespace {
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// Limits for GICE and ICE username sizes.
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const size_t kMaxGiceUsernameSize = 16;
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const size_t kMaxIceUsernameSize = 512;
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} // namespace
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namespace cricket {
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static buzz::XmlElement* NewTransportElement(const std::string& name) {
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return new buzz::XmlElement(buzz::QName(name, LN_TRANSPORT), true);
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}
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P2PTransport::P2PTransport(rtc::Thread* signaling_thread,
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rtc::Thread* worker_thread,
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const std::string& content_name,
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PortAllocator* allocator)
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: Transport(signaling_thread, worker_thread,
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content_name, NS_GINGLE_P2P, allocator) {
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}
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P2PTransport::~P2PTransport() {
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DestroyAllChannels();
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}
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TransportChannelImpl* P2PTransport::CreateTransportChannel(int component) {
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return new P2PTransportChannel(content_name(), component, this,
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port_allocator());
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}
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void P2PTransport::DestroyTransportChannel(TransportChannelImpl* channel) {
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delete channel;
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}
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bool P2PTransportParser::ParseTransportDescription(
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const buzz::XmlElement* elem,
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const CandidateTranslator* translator,
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TransportDescription* desc,
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ParseError* error) {
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ASSERT(elem->Name().LocalPart() == LN_TRANSPORT);
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desc->transport_type = elem->Name().Namespace();
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if (desc->transport_type != NS_GINGLE_P2P)
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return BadParse("Unsupported transport type", error);
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for (const buzz::XmlElement* candidate_elem = elem->FirstElement();
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candidate_elem != NULL;
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candidate_elem = candidate_elem->NextElement()) {
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// Only look at local part because the namespace might (eventually)
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// be NS_GINGLE_P2P or NS_JINGLE_ICE_UDP.
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if (candidate_elem->Name().LocalPart() == LN_CANDIDATE) {
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Candidate candidate;
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if (!ParseCandidate(ICEPROTO_GOOGLE, candidate_elem, translator,
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&candidate, error)) {
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return false;
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}
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desc->candidates.push_back(candidate);
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}
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}
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return true;
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}
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bool P2PTransportParser::WriteTransportDescription(
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const TransportDescription& desc,
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const CandidateTranslator* translator,
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buzz::XmlElement** out_elem,
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WriteError* error) {
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TransportProtocol proto = TransportProtocolFromDescription(&desc);
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rtc::scoped_ptr<buzz::XmlElement> trans_elem(
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NewTransportElement(desc.transport_type));
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// Fail if we get HYBRID or ICE right now.
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// TODO(juberti): Add ICE and HYBRID serialization.
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if (proto != ICEPROTO_GOOGLE) {
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LOG(LS_ERROR) << "Failed to serialize non-GICE TransportDescription";
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return false;
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}
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for (std::vector<Candidate>::const_iterator iter = desc.candidates.begin();
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iter != desc.candidates.end(); ++iter) {
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rtc::scoped_ptr<buzz::XmlElement> cand_elem(
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new buzz::XmlElement(QN_GINGLE_P2P_CANDIDATE));
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if (!WriteCandidate(proto, *iter, translator, cand_elem.get(), error)) {
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return false;
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}
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trans_elem->AddElement(cand_elem.release());
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}
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*out_elem = trans_elem.release();
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return true;
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}
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bool P2PTransportParser::ParseGingleCandidate(
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const buzz::XmlElement* elem,
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const CandidateTranslator* translator,
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Candidate* candidate,
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ParseError* error) {
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return ParseCandidate(ICEPROTO_GOOGLE, elem, translator, candidate, error);
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}
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bool P2PTransportParser::WriteGingleCandidate(
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const Candidate& candidate,
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const CandidateTranslator* translator,
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buzz::XmlElement** out_elem,
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WriteError* error) {
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rtc::scoped_ptr<buzz::XmlElement> elem(
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new buzz::XmlElement(QN_GINGLE_CANDIDATE));
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bool ret = WriteCandidate(ICEPROTO_GOOGLE, candidate, translator, elem.get(),
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error);
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if (ret) {
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*out_elem = elem.release();
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}
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return ret;
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}
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bool P2PTransportParser::VerifyUsernameFormat(TransportProtocol proto,
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const std::string& username,
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ParseError* error) {
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if (proto == ICEPROTO_GOOGLE || proto == ICEPROTO_HYBRID) {
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if (username.size() > kMaxGiceUsernameSize)
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return BadParse("candidate username is too long", error);
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if (!rtc::Base64::IsBase64Encoded(username))
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return BadParse("candidate username has non-base64 encoded characters",
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error);
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} else if (proto == ICEPROTO_RFC5245) {
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if (username.size() > kMaxIceUsernameSize)
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return BadParse("candidate username is too long", error);
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}
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return true;
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}
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bool P2PTransportParser::ParseCandidate(TransportProtocol proto,
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const buzz::XmlElement* elem,
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const CandidateTranslator* translator,
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Candidate* candidate,
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ParseError* error) {
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ASSERT(proto == ICEPROTO_GOOGLE);
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ASSERT(translator != NULL);
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if (!elem->HasAttr(buzz::QN_NAME) ||
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!elem->HasAttr(QN_ADDRESS) ||
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!elem->HasAttr(QN_PORT) ||
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!elem->HasAttr(QN_USERNAME) ||
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!elem->HasAttr(QN_PROTOCOL) ||
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!elem->HasAttr(QN_GENERATION)) {
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return BadParse("candidate missing required attribute", error);
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}
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rtc::SocketAddress address;
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if (!ParseAddress(elem, QN_ADDRESS, QN_PORT, &address, error))
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return false;
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std::string channel_name = elem->Attr(buzz::QN_NAME);
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int component = 0;
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if (!translator ||
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!translator->GetComponentFromChannelName(channel_name, &component)) {
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return BadParse("candidate has unknown channel name " + channel_name,
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error);
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}
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float preference = 0.0;
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if (!GetXmlAttr(elem, QN_PREFERENCE, 0.0f, &preference)) {
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return BadParse("candidate has unknown preference", error);
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}
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candidate->set_component(component);
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candidate->set_address(address);
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candidate->set_username(elem->Attr(QN_USERNAME));
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candidate->set_preference(preference);
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candidate->set_protocol(elem->Attr(QN_PROTOCOL));
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candidate->set_generation_str(elem->Attr(QN_GENERATION));
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if (elem->HasAttr(QN_PASSWORD))
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candidate->set_password(elem->Attr(QN_PASSWORD));
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if (elem->HasAttr(buzz::QN_TYPE))
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candidate->set_type(elem->Attr(buzz::QN_TYPE));
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if (elem->HasAttr(QN_NETWORK))
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candidate->set_network_name(elem->Attr(QN_NETWORK));
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if (!VerifyUsernameFormat(proto, candidate->username(), error))
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return false;
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return true;
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}
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bool P2PTransportParser::WriteCandidate(TransportProtocol proto,
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const Candidate& candidate,
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const CandidateTranslator* translator,
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buzz::XmlElement* elem,
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WriteError* error) {
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ASSERT(proto == ICEPROTO_GOOGLE);
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ASSERT(translator != NULL);
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std::string channel_name;
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if (!translator ||
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!translator->GetChannelNameFromComponent(
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candidate.component(), &channel_name)) {
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return BadWrite("Cannot write candidate because of unknown component.",
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error);
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}
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elem->SetAttr(buzz::QN_NAME, channel_name);
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elem->SetAttr(QN_ADDRESS, candidate.address().ipaddr().ToString());
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elem->SetAttr(QN_PORT, candidate.address().PortAsString());
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AddXmlAttr(elem, QN_PREFERENCE, candidate.preference());
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elem->SetAttr(QN_USERNAME, candidate.username());
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elem->SetAttr(QN_PROTOCOL, candidate.protocol());
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elem->SetAttr(QN_GENERATION, candidate.generation_str());
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if (!candidate.password().empty())
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elem->SetAttr(QN_PASSWORD, candidate.password());
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elem->SetAttr(buzz::QN_TYPE, candidate.type());
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if (!candidate.network_name().empty())
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elem->SetAttr(QN_NETWORK, candidate.network_name());
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return true;
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}
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} // namespace cricket
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