67ee6b9a62
Review URL: https://webrtc-codereview.appspot.com/7909004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5475 4adac7df-926f-26a2-2b94-8c16560cd09d
320 lines
11 KiB
C++
320 lines
11 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/tcpport.h"
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#include "talk/base/common.h"
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#include "talk/base/logging.h"
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#include "talk/p2p/base/common.h"
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namespace cricket {
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TCPPort::TCPPort(talk_base::Thread* thread,
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talk_base::PacketSocketFactory* factory,
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talk_base::Network* network, const talk_base::IPAddress& ip,
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int min_port, int max_port, const std::string& username,
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const std::string& password, bool allow_listen)
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: Port(thread, LOCAL_PORT_TYPE, factory, network, ip, min_port, max_port,
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username, password),
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incoming_only_(false),
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allow_listen_(allow_listen),
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socket_(NULL),
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error_(0) {
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// TODO(mallinath) - Set preference value as per RFC 6544.
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// http://b/issue?id=7141794
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}
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bool TCPPort::Init() {
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if (allow_listen_) {
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// Treat failure to create or bind a TCP socket as fatal. This
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// should never happen.
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socket_ = socket_factory()->CreateServerTcpSocket(
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talk_base::SocketAddress(ip(), 0), min_port(), max_port(),
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false /* ssl */);
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if (!socket_) {
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LOG_J(LS_ERROR, this) << "TCP socket creation failed.";
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return false;
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}
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socket_->SignalNewConnection.connect(this, &TCPPort::OnNewConnection);
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socket_->SignalAddressReady.connect(this, &TCPPort::OnAddressReady);
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}
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return true;
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}
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TCPPort::~TCPPort() {
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delete socket_;
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std::list<Incoming>::iterator it;
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for (it = incoming_.begin(); it != incoming_.end(); ++it)
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delete it->socket;
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incoming_.clear();
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}
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Connection* TCPPort::CreateConnection(const Candidate& address,
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CandidateOrigin origin) {
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// We only support TCP protocols
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if ((address.protocol() != TCP_PROTOCOL_NAME) &&
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(address.protocol() != SSLTCP_PROTOCOL_NAME)) {
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return NULL;
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}
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// We can't accept TCP connections incoming on other ports
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if (origin == ORIGIN_OTHER_PORT)
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return NULL;
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// Check if we are allowed to make outgoing TCP connections
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if (incoming_only_ && (origin == ORIGIN_MESSAGE))
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return NULL;
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// We don't know how to act as an ssl server yet
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if ((address.protocol() == SSLTCP_PROTOCOL_NAME) &&
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(origin == ORIGIN_THIS_PORT)) {
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return NULL;
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}
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if (!IsCompatibleAddress(address.address())) {
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return NULL;
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}
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TCPConnection* conn = NULL;
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if (talk_base::AsyncPacketSocket* socket =
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GetIncoming(address.address(), true)) {
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socket->SignalReadPacket.disconnect(this);
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conn = new TCPConnection(this, address, socket);
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} else {
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conn = new TCPConnection(this, address);
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}
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AddConnection(conn);
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return conn;
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}
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void TCPPort::PrepareAddress() {
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if (socket_) {
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// If socket isn't bound yet the address will be added in
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// OnAddressReady(). Socket may be in the CLOSED state if Listen()
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// failed, we still want ot add the socket address.
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LOG(LS_VERBOSE) << "Preparing TCP address, current state: "
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<< socket_->GetState();
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if (socket_->GetState() == talk_base::AsyncPacketSocket::STATE_BOUND ||
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socket_->GetState() == talk_base::AsyncPacketSocket::STATE_CLOSED)
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AddAddress(socket_->GetLocalAddress(), socket_->GetLocalAddress(),
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TCP_PROTOCOL_NAME, LOCAL_PORT_TYPE,
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ICE_TYPE_PREFERENCE_HOST_TCP, true);
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} else {
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LOG_J(LS_INFO, this) << "Not listening due to firewall restrictions.";
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// Note: We still add the address, since otherwise the remote side won't
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// recognize our incoming TCP connections.
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AddAddress(talk_base::SocketAddress(ip(), 0),
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talk_base::SocketAddress(ip(), 0), TCP_PROTOCOL_NAME,
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LOCAL_PORT_TYPE, ICE_TYPE_PREFERENCE_HOST_TCP, true);
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}
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}
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int TCPPort::SendTo(const void* data, size_t size,
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const talk_base::SocketAddress& addr,
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talk_base::DiffServCodePoint dscp,
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bool payload) {
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talk_base::AsyncPacketSocket * socket = NULL;
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if (TCPConnection * conn = static_cast<TCPConnection*>(GetConnection(addr))) {
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socket = conn->socket();
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} else {
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socket = GetIncoming(addr);
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}
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if (!socket) {
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LOG_J(LS_ERROR, this) << "Attempted to send to an unknown destination, "
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<< addr.ToSensitiveString();
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return -1; // TODO: Set error_
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}
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int sent = socket->Send(data, size, dscp);
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if (sent < 0) {
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error_ = socket->GetError();
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LOG_J(LS_ERROR, this) << "TCP send of " << size
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<< " bytes failed with error " << error_;
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}
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return sent;
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}
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int TCPPort::GetOption(talk_base::Socket::Option opt, int* value) {
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if (socket_) {
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return socket_->GetOption(opt, value);
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} else {
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return SOCKET_ERROR;
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}
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}
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int TCPPort::SetOption(talk_base::Socket::Option opt, int value) {
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if (socket_) {
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return socket_->SetOption(opt, value);
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} else {
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return SOCKET_ERROR;
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}
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}
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int TCPPort::GetError() {
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return error_;
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}
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void TCPPort::OnNewConnection(talk_base::AsyncPacketSocket* socket,
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talk_base::AsyncPacketSocket* new_socket) {
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ASSERT(socket == socket_);
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Incoming incoming;
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incoming.addr = new_socket->GetRemoteAddress();
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incoming.socket = new_socket;
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incoming.socket->SignalReadPacket.connect(this, &TCPPort::OnReadPacket);
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incoming.socket->SignalReadyToSend.connect(this, &TCPPort::OnReadyToSend);
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LOG_J(LS_VERBOSE, this) << "Accepted connection from "
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<< incoming.addr.ToSensitiveString();
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incoming_.push_back(incoming);
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}
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talk_base::AsyncPacketSocket* TCPPort::GetIncoming(
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const talk_base::SocketAddress& addr, bool remove) {
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talk_base::AsyncPacketSocket* socket = NULL;
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for (std::list<Incoming>::iterator it = incoming_.begin();
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it != incoming_.end(); ++it) {
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if (it->addr == addr) {
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socket = it->socket;
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if (remove)
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incoming_.erase(it);
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break;
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}
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}
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return socket;
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}
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void TCPPort::OnReadPacket(talk_base::AsyncPacketSocket* socket,
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const char* data, size_t size,
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const talk_base::SocketAddress& remote_addr,
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const talk_base::PacketTime& packet_time) {
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Port::OnReadPacket(data, size, remote_addr, PROTO_TCP);
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}
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void TCPPort::OnReadyToSend(talk_base::AsyncPacketSocket* socket) {
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Port::OnReadyToSend();
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}
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void TCPPort::OnAddressReady(talk_base::AsyncPacketSocket* socket,
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const talk_base::SocketAddress& address) {
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AddAddress(address, address, "tcp",
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LOCAL_PORT_TYPE, ICE_TYPE_PREFERENCE_HOST_TCP,
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true);
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}
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TCPConnection::TCPConnection(TCPPort* port, const Candidate& candidate,
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talk_base::AsyncPacketSocket* socket)
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: Connection(port, 0, candidate), socket_(socket), error_(0) {
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bool outgoing = (socket_ == NULL);
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if (outgoing) {
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// TODO: Handle failures here (unlikely since TCP).
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int opts = (candidate.protocol() == SSLTCP_PROTOCOL_NAME) ?
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talk_base::PacketSocketFactory::OPT_SSLTCP : 0;
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socket_ = port->socket_factory()->CreateClientTcpSocket(
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talk_base::SocketAddress(port_->Network()->ip(), 0),
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candidate.address(), port->proxy(), port->user_agent(), opts);
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if (socket_) {
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LOG_J(LS_VERBOSE, this) << "Connecting from "
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<< socket_->GetLocalAddress().ToSensitiveString()
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<< " to "
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<< candidate.address().ToSensitiveString();
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set_connected(false);
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socket_->SignalConnect.connect(this, &TCPConnection::OnConnect);
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} else {
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LOG_J(LS_WARNING, this) << "Failed to create connection to "
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<< candidate.address().ToSensitiveString();
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}
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} else {
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// Incoming connections should match the network address.
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ASSERT(socket_->GetLocalAddress().ipaddr() == port->ip());
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}
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if (socket_) {
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socket_->SignalReadPacket.connect(this, &TCPConnection::OnReadPacket);
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socket_->SignalReadyToSend.connect(this, &TCPConnection::OnReadyToSend);
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socket_->SignalClose.connect(this, &TCPConnection::OnClose);
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}
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}
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TCPConnection::~TCPConnection() {
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delete socket_;
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}
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int TCPConnection::Send(const void* data, size_t size,
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talk_base::DiffServCodePoint dscp) {
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if (!socket_) {
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error_ = ENOTCONN;
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return SOCKET_ERROR;
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}
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if (write_state() != STATE_WRITABLE) {
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// TODO: Should STATE_WRITE_TIMEOUT return a non-blocking error?
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error_ = EWOULDBLOCK;
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return SOCKET_ERROR;
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}
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int sent = socket_->Send(data, size, dscp);
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if (sent < 0) {
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error_ = socket_->GetError();
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} else {
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send_rate_tracker_.Update(sent);
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}
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return sent;
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}
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int TCPConnection::GetError() {
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return error_;
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}
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void TCPConnection::OnConnect(talk_base::AsyncPacketSocket* socket) {
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ASSERT(socket == socket_);
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LOG_J(LS_VERBOSE, this) << "Connection established to "
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<< socket->GetRemoteAddress().ToSensitiveString();
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set_connected(true);
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}
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void TCPConnection::OnClose(talk_base::AsyncPacketSocket* socket, int error) {
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ASSERT(socket == socket_);
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LOG_J(LS_VERBOSE, this) << "Connection closed with error " << error;
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set_connected(false);
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set_write_state(STATE_WRITE_TIMEOUT);
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}
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void TCPConnection::OnReadPacket(
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talk_base::AsyncPacketSocket* socket, const char* data, size_t size,
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const talk_base::SocketAddress& remote_addr,
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const talk_base::PacketTime& packet_time) {
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ASSERT(socket == socket_);
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Connection::OnReadPacket(data, size, packet_time);
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}
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void TCPConnection::OnReadyToSend(talk_base::AsyncPacketSocket* socket) {
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ASSERT(socket == socket_);
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Connection::OnReadyToSend();
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}
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} // namespace cricket
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