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1 files changed, 109 insertions, 0 deletions

diff --git a/src/multicast.cc b/src/multicast.cc
new file mode 100644
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--- /dev/null
+++ b/src/multicast.cc
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            multicast.cc
+ *
+ *  Mon Sep 26 12:25:22 CEST 2005
+ *  Copyright  2005 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of MIaV.
+ *
+ *  MIaV 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.
+ *
+ *  MIaV 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 MIaV; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "config.h"
+#include "multicast.h"
+
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/param.h>
+#include <arpa/inet.h>
+
+Multicast::Multicast(Info *i)
+{
+  char addr[] = "192.168.0.10";
+  int port = 666;
+
+  info = i;
+  if(!UDPOpen(addr, port)) info->error("Error creating socket %s:%d", addr, port);
+}
+
+Multicast::~Multicast()
+{
+}
+
+void Multicast::Write(char* buf, int size)
+{
+  if(write(sock, buf, size) != size) info->error("Error Writing to socket.");
+}
+
+
+/*
+ * open UDP socket
+ */
+bool Multicast::UDPOpen(char * address, int port)
+{
+  int enable = 1L;
+  struct sockaddr_in stAddr;
+  struct sockaddr_in stLclAddr;
+  struct hostent * host;
+  //  int sock;
+  
+  stAddr.sin_family = AF_INET;
+  stAddr.sin_port = htons(port);
+  if((host = gethostbyname(address)) == NULL) return false;
+  stAddr.sin_addr = *((struct in_addr *) host->h_addr_list[0]);
+
+  /* Create a UDP socket */
+  if((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+        return false;
+
+  /* Allow multiple instance of the client to share the same address and port */  if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &enable, sizeof(unsigned long int)) < 0) return false;
+
+#ifdef USE_MULTICAST
+  /* If the address is multicast, register to the multicast group */
+  if(is_address_multicast(stAddr.sin_addr.s_addr))
+  {
+    struct ip_mreq stMreq;
+  
+    /* Bind the socket to port */
+    stLclAddr.sin_family      = AF_INET;
+    stLclAddr.sin_addr.s_addr = htonl(INADDR_ANY);
+    stLclAddr.sin_port        = stAddr.sin_port;
+    if(bind(sock, (struct sockaddr*) & stLclAddr, sizeof(stLclAddr)) < 0) return false;
+
+    /* Register to a multicast address */
+    stMreq.imr_multiaddr.s_addr = stAddr.sin_addr.s_addr;
+    stMreq.imr_interface.s_addr = INADDR_ANY;
+    if(setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) & stMreq, sizeof(stMreq)) < 0) 
+      return false;
+  }
+  else
+#endif
+  {
+    /* Bind the socket to port */
+    stLclAddr.sin_family      = AF_INET;
+    stLclAddr.sin_addr.s_addr = htonl(INADDR_ANY);
+    stLclAddr.sin_port        = htons(0);
+    if(bind(sock, (struct sockaddr*) & stLclAddr, sizeof(stLclAddr)) < 0)
+        return false;
+  }
+
+  connect(sock, (struct sockaddr*) & stAddr, sizeof(stAddr));
+
+  return true;
+}