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authordeva <deva>2005-10-04 21:39:53 +0000
committerdeva <deva>2005-10-04 21:39:53 +0000
commit111b16802de661228ef414eb6ec7484e2fa186ed (patch)
treed6d1ce9e8b857371414f33ff460266258c462275 /src/multicast.cc
parent9640339f2e9dc126406f6b6f8a091b924898b4f5 (diff)
*** empty log message ***
Diffstat (limited to 'src/multicast.cc')
-rw-r--r--src/multicast.cc109
1 files changed, 109 insertions, 0 deletions
diff --git a/src/multicast.cc b/src/multicast.cc
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+++ b/src/multicast.cc
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+/* -*- 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;
+}