blob: 46142c2eec03644ad83fa70d65e8bcada5a4bca0 [file] [log] [blame]
/*
* 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/tcpport.h"
#include "talk/base/common.h"
#include "talk/base/logging.h"
#include "talk/p2p/base/common.h"
namespace cricket {
TCPPort::TCPPort(talk_base::Thread* thread,
talk_base::PacketSocketFactory* factory,
talk_base::Network* network, uint32 ip,
int min_port, int max_port, bool allow_listen)
: Port(thread, LOCAL_PORT_TYPE, factory, network, ip, min_port, max_port),
incoming_only_(false),
allow_listen_(allow_listen),
socket_(NULL),
error_(0) {
}
bool TCPPort::Init() {
if (allow_listen_) {
// Treat failure to create or bind a TCP socket as fatal. This
// should never happen.
socket_ = factory_->CreateServerTcpSocket(
talk_base::SocketAddress(ip_, 0), min_port_, max_port_,
false /* ssl */);
if (!socket_) {
LOG_J(LS_ERROR, this) << "TCP socket creation failed.";
return false;
}
socket_->SignalNewConnection.connect(this, &TCPPort::OnNewConnection);
}
return true;
}
TCPPort::~TCPPort() {
delete socket_;
}
Connection* TCPPort::CreateConnection(const Candidate& address,
CandidateOrigin origin) {
// We only support TCP protocols
if ((address.protocol() != "tcp") && (address.protocol() != "ssltcp"))
return NULL;
// We can't accept TCP connections incoming on other ports
if (origin == ORIGIN_OTHER_PORT)
return NULL;
// Check if we are allowed to make outgoing TCP connections
if (incoming_only_ && (origin == ORIGIN_MESSAGE))
return NULL;
// We don't know how to act as an ssl server yet
if ((address.protocol() == "ssltcp") && (origin == ORIGIN_THIS_PORT))
return NULL;
TCPConnection* conn = NULL;
if (talk_base::AsyncPacketSocket* socket =
GetIncoming(address.address(), true)) {
socket->SignalReadPacket.disconnect(this);
conn = new TCPConnection(this, address, socket);
} else {
conn = new TCPConnection(this, address);
}
AddConnection(conn);
return conn;
}
void TCPPort::PrepareAddress() {
if (socket_) {
AddAddress(socket_->GetLocalAddress(), "tcp", true);
} else {
LOG_J(LS_INFO, this) << "Not listening due to firewall restrictions.";
// Note: We still add the address, since otherwise the remote side won't
// recognize our incoming TCP connections.
AddAddress(talk_base::SocketAddress(ip_, 0), "tcp", true);
}
}
int TCPPort::SendTo(const void* data, size_t size,
const talk_base::SocketAddress& addr, bool payload) {
talk_base::AsyncPacketSocket * socket = NULL;
if (TCPConnection * conn = static_cast<TCPConnection*>(GetConnection(addr))) {
socket = conn->socket();
} else {
socket = GetIncoming(addr);
}
if (!socket) {
LOG_J(LS_ERROR, this) << "Attempted to send to an unknown destination, "
<< addr.ToString();
return -1; // TODO: Set error_
}
int sent = socket->Send(data, size);
if (sent < 0) {
error_ = socket->GetError();
LOG_J(LS_ERROR, this) << "TCP send of " << size
<< " bytes failed with error " << error_;
}
return sent;
}
int TCPPort::GetOption(talk_base::Socket::Option opt, int* value) {
if (socket_) {
return socket_->GetOption(opt, value);
} else {
return SOCKET_ERROR;
}
}
int TCPPort::SetOption(talk_base::Socket::Option opt, int value) {
if (socket_) {
return socket_->SetOption(opt, value);
} else {
return SOCKET_ERROR;
}
}
int TCPPort::GetError() {
return error_;
}
void TCPPort::OnNewConnection(talk_base::AsyncPacketSocket* socket,
talk_base::AsyncPacketSocket* new_socket) {
ASSERT(socket == socket_);
Incoming incoming;
incoming.addr = new_socket->GetRemoteAddress();
incoming.socket = new_socket;
incoming.socket->SignalReadPacket.connect(this, &TCPPort::OnReadPacket);
LOG_J(LS_VERBOSE, this) << "Accepted connection from "
<< incoming.addr.ToString();
incoming_.push_back(incoming);
}
talk_base::AsyncPacketSocket* TCPPort::GetIncoming(
const talk_base::SocketAddress& addr, bool remove) {
talk_base::AsyncPacketSocket* socket = NULL;
for (std::list<Incoming>::iterator it = incoming_.begin();
it != incoming_.end(); ++it) {
if (it->addr == addr) {
socket = it->socket;
if (remove)
incoming_.erase(it);
break;
}
}
return socket;
}
void TCPPort::OnReadPacket(talk_base::AsyncPacketSocket* socket,
const char* data, size_t size,
const talk_base::SocketAddress& remote_addr) {
Port::OnReadPacket(data, size, remote_addr);
}
TCPConnection::TCPConnection(TCPPort* port, const Candidate& candidate,
talk_base::AsyncPacketSocket* socket)
: Connection(port, 0, candidate), socket_(socket), error_(0) {
bool outgoing = (socket_ == NULL);
if (outgoing) {
// TODO: Handle failures here (unlikely since TCP).
socket_ = port->socket_factory()->CreateClientTcpSocket(
talk_base::SocketAddress(port_->network()->ip(), 0),
candidate.address(), port->proxy(), port->user_agent(),
candidate.protocol() == "ssltcp");
if (socket_) {
LOG_J(LS_VERBOSE, this) << "Connecting from "
<< socket_->GetLocalAddress().ToString() << " to "
<< candidate.address().ToString();
set_connected(false);
socket_->SignalConnect.connect(this, &TCPConnection::OnConnect);
} else {
LOG_J(LS_WARNING, this) << "Failed to create connection to "
<< candidate.address().ToString();
}
} else {
// Incoming connections should match the network address
ASSERT(socket_->GetLocalAddress().ip() == port->ip_);
}
if (socket_) {
socket_->SignalReadPacket.connect(this, &TCPConnection::OnReadPacket);
socket_->SignalClose.connect(this, &TCPConnection::OnClose);
}
}
TCPConnection::~TCPConnection() {
delete socket_;
}
int TCPConnection::Send(const void* data, size_t size) {
if (!socket_) {
error_ = ENOTCONN;
return SOCKET_ERROR;
}
if (write_state() != STATE_WRITABLE) {
// TODO: Should STATE_WRITE_TIMEOUT return a non-blocking error?
error_ = EWOULDBLOCK;
return SOCKET_ERROR;
}
int sent = socket_->Send(data, size);
if (sent < 0) {
error_ = socket_->GetError();
} else {
send_rate_tracker_.Update(sent);
}
return sent;
}
int TCPConnection::GetError() {
return error_;
}
void TCPConnection::OnConnect(talk_base::AsyncPacketSocket* socket) {
ASSERT(socket == socket_);
LOG_J(LS_VERBOSE, this) << "Connection established to "
<< socket->GetRemoteAddress().ToString();
set_connected(true);
}
void TCPConnection::OnClose(talk_base::AsyncPacketSocket* socket, int error) {
ASSERT(socket == socket_);
LOG_J(LS_VERBOSE, this) << "Connection closed with error " << error;
set_connected(false);
set_write_state(STATE_WRITE_TIMEOUT);
}
void TCPConnection::OnReadPacket(talk_base::AsyncPacketSocket* socket,
const char* data, size_t size,
const talk_base::SocketAddress& remote_addr) {
ASSERT(socket == socket_);
Connection::OnReadPacket(data, size);
}
} // namespace cricket