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- /* Copyright (C) 2002-2004 RealVNC Ltd. All Rights Reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- // -=- SocketManager.cxx
-
- #define WIN32_LEAN_AND_MEAN
- #include <winsock2.h>
- #include <assert.h>
-
- #include <rfb/LogWriter.h>
- #include <rfb_win32/SocketManager.h>
-
- using namespace rfb;
- using namespace rfb::win32;
-
- static LogWriter vlog("SocketManager");
-
-
- // -=- SocketManager
-
- SocketManager::SocketManager() : sockets(0), events(0), nSockets(0), nAvail(0) {
- }
-
- SocketManager::~SocketManager() {
- for (int i=0; i<nSockets; i++) {
- if (!sockets[i].is_event)
- WSACloseEvent(events[i]);
- }
- delete [] events;
- delete [] sockets;
- }
-
-
- void SocketManager::addListener(network::SocketListener* sock_, network::SocketServer* srvr) {
- WSAEVENT event = WSACreateEvent();
- assert(event != WSA_INVALID_EVENT);
- addListener(sock_, event, srvr);
- }
-
- void SocketManager::addSocket(network::Socket* sock_, network::SocketServer* srvr) {
- WSAEVENT event = WSACreateEvent();
- assert(event != WSA_INVALID_EVENT);
- addSocket(sock_, event, srvr);
- }
-
-
- BOOL SocketManager::getMessage(MSG* msg, HWND hwnd, UINT minMsg, UINT maxMsg) {
- while (true) {
- // First check for idle timeout
-
- network::SocketServer* server = 0;
- int timeout = 0;
- for (int i=0; i<nSockets; i++) {
- if (!sockets[i].is_event &&
- sockets[i].server != server) {
- server = sockets[i].server;
- int t = server->checkTimeouts();
- if (t > 0 && (timeout == 0 || t < timeout))
- timeout = t;
- }
- }
- if (timeout == 0)
- timeout = INFINITE;
-
- // - Network IO is less common than messages - process it first
- DWORD result;
- if (nSockets) {
- result = WaitForMultipleObjects(nSockets, events, FALSE, 0);
- if (result == WAIT_TIMEOUT) {
- if (PeekMessage(msg, hwnd, minMsg, maxMsg, PM_REMOVE))
- return msg->message != WM_QUIT;
-
- result = MsgWaitForMultipleObjects(nSockets, events, FALSE, timeout,
- QS_ALLINPUT);
- if (result == WAIT_OBJECT_0 + nSockets) {
- if (PeekMessage(msg, hwnd, minMsg, maxMsg, PM_REMOVE))
- return msg->message != WM_QUIT;
- continue;
- }
- }
- } else
- return GetMessage(msg, hwnd, minMsg, maxMsg);
-
- if ((result >= WAIT_OBJECT_0) && (result < (WAIT_OBJECT_0 + nSockets))) {
- int index = result - WAIT_OBJECT_0;
-
- // - Process a socket event
-
- if (sockets[index].is_event) {
- // Process a general Win32 event
- // NB: The handler must reset the event!
-
- if (!sockets[index].handler->processEvent(events[index])) {
- removeSocket(index);
- continue;
- }
- } else if (sockets[index].is_conn) {
- // Process data from an active connection
-
- // Cancel event notification for this socket
- if (WSAEventSelect(sockets[index].fd, events[index], 0) == SOCKET_ERROR)
- vlog.info("unable to disable WSAEventSelect:%u", WSAGetLastError());
-
- // Reset the event object
- WSAResetEvent(events[index]);
-
- // Call the socket server to process the event
- if (!sockets[index].server->processSocketEvent(sockets[index].sock.conn)) {
- removeSocket(index);
- continue;
- }
-
- // Re-instate the required socket event
- // If the read event is still valid, the event object gets set here
- if (WSAEventSelect(sockets[index].fd, events[index], FD_READ | FD_CLOSE) == SOCKET_ERROR)
- throw rdr::SystemException("unable to re-enable WSAEventSelect:%u", WSAGetLastError());
-
- } else {
- // Accept an incoming connection
- vlog.debug("accepting incoming connection");
-
- // What kind of event is this?
- WSANETWORKEVENTS network_events;
- WSAEnumNetworkEvents(sockets[index].fd, events[index], &network_events);
- if (network_events.lNetworkEvents & FD_ACCEPT) {
- network::Socket* new_sock = sockets[index].sock.listener->accept();
- if (new_sock) {
- sockets[index].server->addClient(new_sock);
- addSocket(new_sock, sockets[index].server);
- }
- } else if (network_events.lNetworkEvents & FD_CLOSE) {
- vlog.info("deleting listening socket");
- network::SocketListener* s = sockets[index].sock.listener;
- removeSocket(index);
- delete s;
- } else {
- vlog.error("unknown network event for listener");
- }
-
- }
- } else if (result == WAIT_FAILED) {
- throw rdr::SystemException("unable to wait for events", GetLastError());
- }
- }
- }
-
-
- void SocketManager::resizeArrays(int numSockets) {
- if (nAvail >= numSockets) return;
- while (nAvail < numSockets)
- nAvail = max(16, nAvail*2);
-
- SocketInfo* newinfo = new SocketInfo[nAvail];
- HANDLE* newevents = new HANDLE[nAvail];
- for (int i=0; i<nSockets; i++) {
- newinfo[i] = sockets[i];
- newevents[i] = events[i];
- }
- delete [] sockets;
- delete [] events;
- sockets = newinfo;
- events = newevents;
- }
-
- void SocketManager::addSocket(network::Socket* sock, HANDLE event, network::SocketServer* server) {
- resizeArrays(nSockets+1);
-
- sockets[nSockets].sock.conn = sock;
- sockets[nSockets].fd = sock->getFd();
- sockets[nSockets].server = server;
- events[nSockets] = event;
- sockets[nSockets].is_conn = true;
- sockets[nSockets].is_event = false;
-
- if (WSAEventSelect(sock->getFd(), event, FD_READ | FD_CLOSE) == SOCKET_ERROR)
- throw rdr::SystemException("unable to select on socket", WSAGetLastError());
- nSockets++;
- }
-
- void SocketManager::addListener(network::SocketListener* sock, HANDLE event, network::SocketServer* server) {
- resizeArrays(nSockets+1);
-
- sockets[nSockets].sock.listener = sock;
- sockets[nSockets].fd = sock->getFd();
- sockets[nSockets].server = server;
- events[nSockets] = event;
- sockets[nSockets].is_conn = false;
- sockets[nSockets].is_event = false;
-
- if (WSAEventSelect(sock->getFd(), event, FD_ACCEPT | FD_CLOSE) == SOCKET_ERROR)
- throw rdr::SystemException("unable to select on listener", WSAGetLastError());
- nSockets++;
- }
-
- void SocketManager::remListener(network::SocketListener* sock) {
- for (int index=0; index<nSockets; index++) {
- if (!sockets[index].is_conn &&
- !sockets[index].is_event) {
- vlog.debug("removing listening socket");
- removeSocket(index);
- delete sock;
- }
- }
- }
-
- void SocketManager::addEvent(HANDLE event, EventHandler* ecb) {
- resizeArrays(nSockets+1);
-
- sockets[nSockets].handler = ecb;
- events[nSockets] = event;
- sockets[nSockets].is_conn = false;
- sockets[nSockets].is_event = true;
-
- nSockets++;
- }
-
- void SocketManager::removeSocket(int index) {
- if (index >= nSockets)
- throw rdr::Exception("attempting to remove unregistered socket");
-
- if (!sockets[index].is_event)
- WSACloseEvent(events[index]);
-
- for (int i=index; i<nSockets-1; i++) {
- sockets[i] = sockets[i+1];
- events[i] = events[i+1];
- }
-
- nSockets--;
- }
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