first alpha version of libvncclient

1 files changed, 94 insertions, 0 deletions

diff --git a/libvncclient/listen.c b/libvncclient/listen.c
new file mode 100644
index 0000000..c11aef7
--- /dev/null
+++ b/libvncclient/listen.c
@@ -0,0 +1,94 @@
+/*
+ *  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
+ */
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <sys/utsname.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)
+{
+  int listenSocket;
+  fd_set fds;
+
+  client->listenSpecified = TRUE;
+
+  listenSocket = ListenAtTcpPort(client->listenPort);
+
+  if ((listenSocket < 0)) exit(1);
+
+  fprintf(stderr,"%s -listen: Listening on port %d\n",
+	  client->programName,client->listenPort);
+  fprintf(stderr,"%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) exit(1);
+      if (!SetNonBlocking(client->sock)) exit(1);
+
+      /* Now fork off a new process to deal with it... */
+
+      switch (fork()) {
+
+      case -1: 
+	perror("fork"); 
+	exit(1);
+
+      case 0:
+	/* child - return to caller */
+	close(listenSocket);
+	return;
+
+      default:
+	/* parent - go round and listen again */
+	close(client->sock); 
+	break;
+      }
+    }
+  }
+}
+
+