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/*
* 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.
*/
#if defined(_MSC_VER) && _MSC_VER < 1300
#pragma warning(disable:4786)
#endif
#include "talk/p2p/base/tcpport.h"
#include "talk/base/logging.h"
#ifdef WIN32
#include "talk/base/winfirewall.h"
#endif // WIN32
#include <iostream>
#include <cassert>
#if defined(_MSC_VER) && _MSC_VER < 1300
namespace std {
using ::strerror;
}
#endif
#ifdef POSIX
extern "C" {
#include <errno.h>
}
#endif // POSIX
namespace cricket {
#ifdef WIN32
static WinFirewall win_firewall;
#endif // WIN32
TCPPort::TCPPort(Thread* thread, SocketFactory* factory, Network* network,
const SocketAddress& address)
: Port(thread, LOCAL_PORT_TYPE, factory, network), error_(0) {
incoming_only_ = (address.port() != 0);
socket_ = thread->socketserver()->CreateAsyncSocket(SOCK_STREAM);
socket_->SignalReadEvent.connect(this, &TCPPort::OnAcceptEvent);
if (socket_->Bind(address) < 0)
LOG(INFO) << "bind: " << std::strerror(socket_->GetError());
}
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 0;
// We can't accept TCP connections incoming on other ports
if (origin == ORIGIN_OTHER_PORT)
return 0;
// Check if we are allowed to make outgoing TCP connections
if (incoming_only_ && (origin == ORIGIN_MESSAGE))
return 0;
// We don't know how to act as an ssl server yet
if ((address.protocol() == "ssltcp") && (origin == ORIGIN_THIS_PORT))
return 0;
TCPConnection* conn = 0;
if (AsyncTCPSocket * 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() {
assert(socket_);
bool allow_listen = true;
#ifdef WIN32
if (win_firewall.Initialize()) {
char module_path[MAX_PATH + 1] = { 0 };
::GetModuleFileNameA(NULL, module_path, MAX_PATH);
if (win_firewall.Enabled() && !win_firewall.Authorized(module_path)) {
allow_listen = false;
}
}
#endif // WIN32
if (allow_listen) {
if (socket_->Listen(5) < 0)
LOG(INFO) << "listen: " << std::strerror(socket_->GetError());
} else {
LOG(INFO) << "not listening due to firewall restrictions";
}
// Note: We still add the address, since otherwise the remote side won't recognize
// our incoming TCP connections.
add_address(socket_->GetLocalAddress(), "tcp");
}
int TCPPort::SendTo(const void* data, size_t size, const SocketAddress& addr, bool payload) {
AsyncTCPSocket * socket = 0;
if (TCPConnection * conn = static_cast<TCPConnection*>(GetConnection(addr))) {
socket = conn->socket();
} else {
socket = GetIncoming(addr);
}
if (!socket) {
LOG(INFO) << "Unknown destination for SendTo: " << addr.ToString();
return -1; // TODO: Set error_
}
//LOG(INFO) << "TCPPort::SendTo(" << size << ", " << addr.ToString() << ")";
int sent = socket->Send(data, size);
if (sent < 0)
error_ = socket->GetError();
return sent;
}
int TCPPort::SetOption(Socket::Option opt, int value) {
return socket_->SetOption(opt, value);
}
int TCPPort::GetError() {
assert(socket_);
return error_;
}
void TCPPort::OnAcceptEvent(AsyncSocket* socket) {
assert(socket == socket_);
Incoming incoming;
AsyncSocket * newsocket = static_cast<AsyncSocket *>(socket->Accept(&incoming.addr));
if (!newsocket) {
// TODO: Do something better like forwarding the error to the user.
LOG(INFO) << "accept: " << socket_->GetError() << " " << std::strerror(socket_->GetError());
return;
}
incoming.socket = new AsyncTCPSocket(newsocket);
incoming.socket->SignalReadPacket.connect(this, &TCPPort::OnReadPacket);
LOG(INFO) << "accepted incoming connection from " << incoming.addr.ToString();
incoming_.push_back(incoming);
// Prime a read event in case data is waiting
newsocket->SignalReadEvent(newsocket);
}
AsyncTCPSocket * TCPPort::GetIncoming(const SocketAddress& addr, bool remove) {
AsyncTCPSocket * socket = 0;
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(const char* data, size_t size, const SocketAddress& remote_addr,
AsyncPacketSocket* socket) {
Port::OnReadPacket(data, size, remote_addr);
}
TCPConnection::TCPConnection(TCPPort* port, const Candidate& candidate, AsyncTCPSocket* socket)
: Connection(port, 0, candidate), socket_(socket), error_(0) {
bool outgoing = (socket_ == 0);
if (outgoing) {
socket_ = static_cast<AsyncTCPSocket *>(port->CreatePacketSocket(
(candidate.protocol() == "ssltcp") ? PROTO_SSLTCP : PROTO_TCP));
}
socket_->SignalReadPacket.connect(this, &TCPConnection::OnReadPacket);
socket_->SignalClose.connect(this, &TCPConnection::OnClose);
if (outgoing) {
connected_ = false;
socket_->SignalConnect.connect(this, &TCPConnection::OnConnect);
socket_->Connect(candidate.address());
LOG(INFO) << "Connecting to " << candidate.address().ToString();
}
}
TCPConnection::~TCPConnection() {
}
int TCPConnection::Send(const void* data, size_t size) {
if (write_state() != STATE_WRITABLE)
return 0;
int sent = socket_->Send(data, size);
if (sent < 0) {
error_ = socket_->GetError();
} else {
sent_total_bytes_ += sent;
}
return sent;
}
int TCPConnection::GetError() {
return error_;
}
TCPPort* TCPConnection::tcpport() {
return static_cast<TCPPort*>(port_);
}
void TCPConnection::OnConnect(AsyncTCPSocket* socket) {
assert(socket == socket_);
LOG(INFO) << "tcp connected to " << socket->GetRemoteAddress().ToString();
set_connected(true);
}
void TCPConnection::OnClose(AsyncTCPSocket* socket, int error) {
assert(socket == socket_);
LOG(INFO) << "tcp closed with error: " << error;
set_connected(false);
}
void TCPConnection::OnReadPacket(const char* data, size_t size, const SocketAddress& remote_addr,
AsyncPacketSocket* socket) {
assert(socket == socket_);
Connection::OnReadPacket(data, size);
}
} // namespace cricket
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