add libvncserver

[presencevnc] / libvnc / libvncclient / listen.c

diff --git a/libvnc/libvncclient/listen.c b/libvnc/libvncclient/listen.c
new file mode 100644 (file)
index 0000000..7347a27
--- /dev/null
+++ b/libvnc/libvncclient/listen.c
@@ -0,0 +1,110 @@
+/*
+ *  Copyright (C) 1999 AT&T Laboratories Cambridge.  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.
+ */
+
+/*
+ * listen.c - listen for incoming connections
+ */
+
+#ifdef __STRICT_ANSI__
+#define _BSD_SOURCE
+#endif
+#include <unistd.h>
+#include <sys/types.h>
+#ifdef __MINGW32__
+#include <winsock2.h>
+#else
+#include <sys/wait.h>
+#include <sys/utsname.h>
+#endif
+#include <sys/time.h>
+#include <rfb/rfbclient.h>
+
+/*
+ * listenForIncomingConnections() - listen for incoming connections from
+ * servers, and fork a new process to deal with each connection.
+ */
+
+void
+listenForIncomingConnections(rfbClient* client)
+{
+#ifdef __MINGW32__
+  /* FIXME */
+  rfbClientErr("listenForIncomingConnections on MinGW32 NOT IMPLEMENTED\n");
+  return;
+#else
+  int listenSocket;
+  fd_set fds;
+
+  client->listenSpecified = TRUE;
+
+  listenSocket = ListenAtTcpPort(client->listenPort);
+
+  if ((listenSocket < 0))
+    return;
+
+  rfbClientLog("%s -listen: Listening on port %d\n",
+         client->programName,client->listenPort);
+  rfbClientLog("%s -listen: Command line errors are not reported until "
+         "a connection comes in.\n", client->programName);
+
+  while (TRUE) {
+
+    /* reap any zombies */
+    int status, pid;
+    while ((pid= wait3(&status, WNOHANG, (struct rusage *)0))>0);
+
+    /* TODO: callback for discard any events (like X11 events) */
+
+    FD_ZERO(&fds); 
+
+    FD_SET(listenSocket, &fds);
+
+    select(FD_SETSIZE, &fds, NULL, NULL, NULL);
+
+    if (FD_ISSET(listenSocket, &fds)) {
+      client->sock = AcceptTcpConnection(listenSocket);
+      if (client->sock < 0)
+       return;
+      if (!SetNonBlocking(client->sock))
+       return;
+
+      /* Now fork off a new process to deal with it... */
+
+      switch (fork()) {
+
+      case -1: 
+       rfbClientErr("fork\n"); 
+       return;
+
+      case 0:
+       /* child - return to caller */
+       close(listenSocket);
+       return;
+
+      default:
+       /* parent - go round and listen again */
+       close(client->sock); 
+       break;
+      }
+    }
+  }
+#endif
+}
+
+