/**
* Helper function to resolve a connected socket.
* @param runp information about the socket to try not
* @return the opened socket or INVALID_SOCKET
*/
static SOCKET ConnectLoopProc(addrinfo *runp)
{
const char *type = NetworkAddress::SocketTypeAsString(runp->ai_socktype);
const char *family = NetworkAddress::AddressFamilyAsString(runp->ai_family);
const char *address = NetworkAddress(runp->ai_addr, (int)runp->ai_addrlen).GetAddressAsString();
SOCKET sock = socket(runp->ai_family, runp->ai_socktype, runp->ai_protocol);
if (sock == INVALID_SOCKET) {
DEBUG(net, 1, "[%s] could not create %s socket: %s", type, family, strerror(errno));
return INVALID_SOCKET;
}
if (!SetNoDelay(sock)) DEBUG(net, 1, "[%s] setting TCP_NODELAY failed", type);
if (connect(sock, runp->ai_addr, (int)runp->ai_addrlen) != 0) {
DEBUG(net, 1, "[%s] could not connect %s socket: %s", type, family, strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
/* Connection succeeded */
if (!SetNonBlocking(sock)) DEBUG(net, 0, "[%s] setting non-blocking mode failed", type);
DEBUG(net, 1, "[%s] connected to %s", type, address);
return sock;
}
bool CMySocketTCPClient::Connect()
{
if (GetType() != TCP_CLIENT)
return false;
if (IsConnected())
return false;
m_s = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (FSOCK_ISERROR(m_s))
{
FSOCK_CLOSE(m_s);
return false;
}
SetNoDelay(TRUE);
int rc = connect(m_s, (SOCKADDR*)&m_addr, sizeof(m_addr));
if (FSOCK_ISERROR(rc))
{
FSOCK_CLOSE(m_s);
return false;
}
m_bConnected = true;
return true;
}
TCPSocket::TCPSocket( Socket socket, IPv4Address destination ) : TCPSocket::TCPSocket( )
{
m_Socket = socket;
m_Destination = destination;
m_Connected = true;
SetBlockingMode( false );
SetNoDelay();
}
bool TCPSocket::Connect( const IPv4Address& destination )
{
//Set up the socket
m_Socket = static_cast< int >( socket( AF_INET, SOCK_STREAM, IPPROTO_TCP ) ); // Adress Family = INET and the protocol to be used is TCP
if ( m_Socket <= 0 )
{
LogErrorMessage( "Failed to create socket", "TCPSocket" );
return false;
}
SetBlockingMode( false );
// Try to connect
Logger::Log( "Attempting to connect to " + destination.GetPrintableAddressAndPort(), "TCPSocket", LogSeverity::INFO_MSG );
sockaddr_in addr = destination.GetSockAddr();
timeval timeOut;
timeOut.tv_sec = CONNECTION_TIMEOUT_SECONDS;
timeOut.tv_usec = 0;
fd_set set;
FD_ZERO( &set );
FD_SET( m_Socket, &set );
int returnVal;
if ( ( returnVal = connect( m_Socket, ( sockaddr * )&addr, sizeof( sockaddr_in ) ) ) == INVALID_SOCKET )
{
if ( !SHOULD_WAIT_FOR_TIMEOUT )
return false;
}
returnVal = select( static_cast<int>( m_Socket + 1 ), NULL, &set, NULL, &timeOut );
if ( returnVal > 0 ) // A socket was connected
{
m_Destination = destination;
m_Connected = true;
SetNoDelay();
Logger::Log( "Connection attempt to " + destination.GetPrintableAddressAndPort() + " was successfull!", "TCPSocket", LogSeverity::INFO_MSG );
return true;
}
else if ( returnVal == 0 )
{
Logger::Log( "Connection attempt to " + destination.GetPrintableAddressAndPort() + " timed out", "TCPSocket", LogSeverity::INFO_MSG );
return false;
}
else
{
LogErrorMessage( "Connection attempt to " + destination.GetPrintableAddressAndPort() + " failed", "TCPSocket" );
return false;
}
}
/**
* Helper function to resolve a listening.
* @param runp information about the socket to try not
* @return the opened socket or INVALID_SOCKET
*/
static SOCKET ListenLoopProc(addrinfo *runp)
{
const char *type = NetworkAddress::SocketTypeAsString(runp->ai_socktype);
const char *family = NetworkAddress::AddressFamilyAsString(runp->ai_family);
const char *address = NetworkAddress(runp->ai_addr, (int)runp->ai_addrlen).GetAddressAsString();
SOCKET sock = socket(runp->ai_family, runp->ai_socktype, runp->ai_protocol);
if (sock == INVALID_SOCKET) {
DEBUG(net, 0, "[%s] could not create %s socket on port %s: %s", type, family, address, strerror(errno));
return INVALID_SOCKET;
}
if (runp->ai_socktype == SOCK_STREAM && !SetNoDelay(sock)) {
DEBUG(net, 3, "[%s] setting TCP_NODELAY failed for port %s", type, address);
}
int on = 1;
/* The (const char*) cast is needed for windows!! */
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*)&on, sizeof(on)) == -1) {
DEBUG(net, 3, "[%s] could not set reusable %s sockets for port %s: %s", type, family, address, strerror(errno));
}
if (runp->ai_family == AF_INET6 &&
setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&on, sizeof(on)) == -1) {
DEBUG(net, 3, "[%s] could not disable IPv4 over IPv6 on port %s: %s", type, address, strerror(errno));
}
if (bind(sock, runp->ai_addr, (int)runp->ai_addrlen) != 0) {
DEBUG(net, 1, "[%s] could not bind on %s port %s: %s", type, family, address, strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
if (runp->ai_socktype != SOCK_DGRAM && listen(sock, 1) != 0) {
DEBUG(net, 1, "[%s] could not listen at %s port %s: %s", type, family, address, strerror(errno));
closesocket(sock);
return INVALID_SOCKET;
}
/* Connection succeeded */
if (!SetNonBlocking(sock)) DEBUG(net, 0, "[%s] setting non-blocking mode failed for %s port %s", type, family, address);
DEBUG(net, 1, "[%s] listening on %s port %s", type, family, address);
return sock;
}
/**
* Resolve this address into a socket
* @param family the type of 'protocol' (IPv4, IPv6)
* @param socktype the type of socket (TCP, UDP, etc)
* @param flags the flags to send to getaddrinfo
* @param sockets the list of sockets to add the sockets to
* @param func the inner working while looping over the address info
* @return the resolved socket or INVALID_SOCKET.
*/
SOCKET NetworkAddress::Resolve(int family, int socktype, int flags, SocketList *sockets, LoopProc func)
{
if (func != ConnectLoopProc) {
return INVALID_SOCKET;
} else {
SOCKET sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock == INVALID_SOCKET) {
throw "Unable to connect";
}
if (!SetNoDelay(sock)) {
DEBUG(net, 1, "setting TCP_NODELAY failed");
}
printf("schedule connect: %d\n", sock);
emscripten_async_call(async_connect, (void *)sock, 10000);
return sock;
}
}
int ServerProxy::handleNewXConnectionFromProxy(int channelId)
{
//
// Connect to the real X server.
//
int retryConnect = control -> OptionServerRetryConnect;
int xServerFd;
for (;;)
{
xServerFd = socket(xServerAddrFamily_, SOCK_STREAM, PF_UNSPEC);
if (xServerFd < 0)
{
#ifdef PANIC
*logofs << "ServerProxy: PANIC! Call to socket failed. "
<< "Error is " << EGET() << " '" << ESTR()
<< "'.\n" << logofs_flush;
#endif
cerr << "Error" << ": Call to socket failed. "
<< "Error is " << EGET() << " '" << ESTR()
<< "'.\n";
return -1;
}
#ifdef TEST
*logofs << "ServerProxy: Trying to connect to X server '"
<< xServerDisplay_ << "'.\n" << logofs_flush;
#endif
int result = connect(xServerFd, xServerAddr_, xServerAddrLength_);
getNewTimestamp();
if (result < 0)
{
#ifdef WARNING
*logofs << "ServerProxy: WARNING! Connection to '"
<< xServerDisplay_ << "' failed with error '"
<< ESTR() << "'. Retrying.\n" << logofs_flush;
#endif
close(xServerFd);
if (--retryConnect == 0)
{
#ifdef PANIC
*logofs << "ServerProxy: PANIC! Connection to '"
<< xServerDisplay_ << "' for channel ID#"
<< channelId << " failed. Error is "
<< EGET() << " '" << ESTR() << "'.\n"
<< logofs_flush;
#endif
cerr << "Error" << ": Connection to '"
<< xServerDisplay_ << "' failed. Error is "
<< EGET() << " '" << ESTR() << "'.\n";
close(xServerFd);
return -1;
}
if (activeChannels_.getSize() == 0)
{
sleep(2);
}
else
{
sleep(1);
}
}
else
{
break;
}
}
assignChannelMap(channelId, xServerFd);
#ifdef TEST
*logofs << "ServerProxy: X server descriptor FD#" << xServerFd
<< " mapped to channel ID#" << channelId << ".\n"
<< logofs_flush;
#endif
//
// Turn queuing off for path proxy-to-X-server.
//
if (control -> OptionServerNoDelay == 1)
{
SetNoDelay(xServerFd, control -> OptionServerNoDelay);
}
//
// If requested, set the size of the TCP send
// and receive buffers.
//
if (control -> OptionServerSendBuffer != -1)
{
SetSendBuffer(xServerFd, control -> OptionServerSendBuffer);
}
if (control -> OptionServerReceiveBuffer != -1)
{
SetReceiveBuffer(xServerFd, control -> OptionServerReceiveBuffer);
}
if (allocateTransport(xServerFd, channelId) < 0)
{
return -1;
}
//
// Starting from protocol level 3 client and server
// caches are created in proxy and shared between all
// channels. If remote proxy has older protocol level
// pointers are NULL and channels must create their
// own instances.
//
channels_[channelId] = new ServerChannel(transports_[channelId], compressor_);
if (channels_[channelId] == NULL)
{
deallocateTransport(channelId);
return -1;
}
increaseChannels(channelId);
//
// Propagate channel stores and caches to the new
// channel.
//
channels_[channelId] -> setOpcodes(opcodeStore_);
channels_[channelId] -> setStores(clientStore_, serverStore_);
channels_[channelId] -> setCaches(clientCache_, serverCache_);
int port = atoi(fontServerPort_);
if (port > 0)
{
channels_[channelId] -> setPorts(port);
}
//
// Let channel configure itself according
// to control parameters.
//
channels_[channelId] -> handleConfiguration();
//
// Check if we have successfully loaded the
// selected cache and, if not, remove it
// from disk.
//
handleCheckLoad();
return 1;
}