930e004a81
Also included the total packets attempted to send. BUG=427555 Copied from https://webrtc-codereview.appspot.com/25959004/ R=harryjin@google.com, juberti@webrtc.org Committed: https://code.google.com/p/webrtc/source/detail?r=7693 Review URL: https://webrtc-codereview.appspot.com/32039004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7713 4adac7df-926f-26a2-2b94-8c16560cd09d
331 lines
11 KiB
C++
331 lines
11 KiB
C++
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/p2p/base/tcpport.h"
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#include "webrtc/p2p/base/common.h"
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#include "webrtc/base/common.h"
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#include "webrtc/base/logging.h"
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namespace cricket {
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TCPPort::TCPPort(rtc::Thread* thread,
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rtc::PacketSocketFactory* factory,
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rtc::Network* network,
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const rtc::IPAddress& ip,
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uint16 min_port,
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uint16 max_port,
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const std::string& username,
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const std::string& password,
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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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rtc::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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if (address.tcptype() == TCPTYPE_ACTIVE_STR ||
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(address.tcptype().empty() && address.address().port() == 0)) {
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// It's active only candidate, we should not try to create connections
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// for these candidates.
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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 (rtc::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 to 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() == rtc::AsyncPacketSocket::STATE_BOUND ||
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socket_->GetState() == rtc::AsyncPacketSocket::STATE_CLOSED)
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AddAddress(socket_->GetLocalAddress(), socket_->GetLocalAddress(),
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rtc::SocketAddress(),
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TCP_PROTOCOL_NAME, TCPTYPE_PASSIVE_STR, LOCAL_PORT_TYPE,
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ICE_TYPE_PREFERENCE_HOST_TCP, 0, 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(rtc::SocketAddress(ip(), 0),
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rtc::SocketAddress(ip(), 0), rtc::SocketAddress(),
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TCP_PROTOCOL_NAME, TCPTYPE_ACTIVE_STR, LOCAL_PORT_TYPE,
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ICE_TYPE_PREFERENCE_HOST_TCP, 0, 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 rtc::SocketAddress& addr,
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const rtc::PacketOptions& options,
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bool payload) {
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rtc::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, options);
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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(rtc::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(rtc::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(rtc::AsyncPacketSocket* socket,
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rtc::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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rtc::AsyncPacketSocket* TCPPort::GetIncoming(
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const rtc::SocketAddress& addr, bool remove) {
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rtc::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(rtc::AsyncPacketSocket* socket,
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const char* data, size_t size,
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const rtc::SocketAddress& remote_addr,
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const rtc::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(rtc::AsyncPacketSocket* socket) {
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Port::OnReadyToSend();
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}
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void TCPPort::OnAddressReady(rtc::AsyncPacketSocket* socket,
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const rtc::SocketAddress& address) {
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AddAddress(address, address, rtc::SocketAddress(),
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TCP_PROTOCOL_NAME, TCPTYPE_PASSIVE_STR, LOCAL_PORT_TYPE,
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ICE_TYPE_PREFERENCE_HOST_TCP, 0, true);
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}
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TCPConnection::TCPConnection(TCPPort* port, const Candidate& candidate,
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rtc::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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rtc::PacketSocketFactory::OPT_SSLTCP : 0;
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socket_ = port->socket_factory()->CreateClientTcpSocket(
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rtc::SocketAddress(port->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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const rtc::PacketOptions& options) {
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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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sent_packets_total_++;
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int sent = socket_->Send(data, size, options);
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if (sent < 0) {
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sent_packets_discarded_++;
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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(rtc::AsyncPacketSocket* socket) {
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ASSERT(socket == socket_);
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// Do not use this connection if the socket bound to a different address than
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// the one we asked for. This is seen in Chrome, where TCP sockets cannot be
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// given a binding address, and the platform is expected to pick the
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// correct local address.
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const rtc::IPAddress& socket_ip = socket->GetLocalAddress().ipaddr();
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if (socket_ip == port()->ip()) {
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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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} else {
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LOG_J(LS_WARNING, this) << "Dropping connection as TCP socket bound to IP "
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<< socket_ip.ToSensitiveString()
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<< ", different from the local candidate IP "
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<< port()->ip().ToSensitiveString();
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socket_->Close();
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}
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}
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void TCPConnection::OnClose(rtc::AsyncPacketSocket* socket, int error) {
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ASSERT(socket == socket_);
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LOG_J(LS_INFO, 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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rtc::AsyncPacketSocket* socket, const char* data, size_t size,
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const rtc::SocketAddress& remote_addr,
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const rtc::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(rtc::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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