From d47112e5481abb3004811cd0ae6d270c24461d9c Mon Sep 17 00:00:00 2001
From: fcolin
Date: Wed, 20 Dec 2000 16:47:19 +0000
Subject: multicast and glut eventloop support

---
 src/ivy.c       |  6 +++++-
 src/ivyprobe.c  | 37 +++++++++++++++++++++++++++++++++++--
 src/ivysocket.c | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 76 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/ivy.c b/src/ivy.c
index 7099430..b5651df 100644
--- a/src/ivy.c
+++ b/src/ivy.c
@@ -608,7 +608,7 @@ void IvyStart (const char* bus)
 	 */
 	broadcast =  SocketBroadcastCreate (SupervisionPort, 0, BroadcastReceive );
 
-
+		
 	/* then, if we only have a port number, resort to default value for network */
 	if (p == q)
 		p = DefaultIvyBus;
@@ -636,6 +636,10 @@ void IvyStart (const char* bus)
 			/* addresses are terminated by a comma or end of string */
 			} else {
 				printf ("Broadcasting on network %lx, port %d\n", mask, SupervisionPort);
+				// test mask value agaisnt CLASS D
+				if ( IN_MULTICAST( mask ) )
+					SocketAddMember (broadcast , mask );
+
 				SocketSendBroadcast (broadcast, mask, SupervisionPort, "%d %hu\n", VERSION, ApplicationPort); 
 				numelem = 0;
 				mask = 0xffffffff;
diff --git a/src/ivyprobe.c b/src/ivyprobe.c
index c73df3a..f8e02fb 100644
--- a/src/ivyprobe.c
+++ b/src/ivyprobe.c
@@ -6,7 +6,7 @@
  *
  * 	Main and only file
  *
- *	Authors: François-Régis Colin <fcolin@cena.dgac.fr>
+ *	Authors: François-Régis Colin <fcolin@cena.fr>
  *
  *	$Id$
  * 
@@ -24,6 +24,10 @@
 #undef IVYMAINLOOP
 #endif
 
+#ifdef GLUTMAINLOOP
+#undef IVYMAINLOOP
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -39,6 +43,9 @@
 #ifdef GTKMAINLOOP
 #include "ivygtkloop.h"
 #endif
+#ifdef GLUTMAINLOOP
+#include "ivyglutloop.h"
+#endif
 #ifdef IVYMAINLOOP
 #include "ivyloop.h"
 #endif
@@ -79,6 +86,9 @@ void HandleStdin (Channel channel, HANDLE fd, void *data)
 #ifdef GTKMAINLOOP
 		IvyGtkChannelClose(channel);
 #endif
+#ifdef GLUTMAINLOOP
+		IvyGlutChannelClose(channel);
+#endif
 #ifdef IVYMAINLOOP
 		IvyChannelClose (channel);
 		IvyStop();
@@ -183,6 +193,9 @@ void ApplicationCallback (IvyClientPtr app, void *user_data, IvyApplicationEvent
 #ifdef GTKMAINLLOP
 		IvyGtkChannelSetUp( 0, NULL, NULL, HandleStdin);
 #endif
+#ifdef GLUTMAINLLOP
+		IvyGlutChannelSetUp( 0, NULL, NULL, HandleStdin);
+#endif
 #ifdef IVYMAINLOOP
 		IvyChannelSetUp (0, NULL, NULL, HandleStdin);
 #endif
@@ -208,7 +221,14 @@ void TimerCall(TimerId id, void *user_data, unsigned long delta)
 	/*if  ((int)user_data == 5) TimerModify (id, 2000);*/
 }
 #endif
-
+#ifdef GLUTMAINLLOP
+void
+display(void)
+{
+  glClear(GL_COLOR_BUFFER_BIT);
+  glFlush();
+}
+#endif
 
 int main(int argc, char *argv[])
 {
@@ -236,6 +256,12 @@ int main(int argc, char *argv[])
 	cntx = XtCreateApplicationContext();
 	IvyXtChannelAppContext (cntx);
 #endif
+#ifdef GLUTMAINLLOOP
+	glutInit(&argc, argv);
+	glutCreateWindow("IvyProbe Test");
+	glClearColor(0.49, 0.62, 0.75, 0.0);
+	glutDisplayFunc(display);
+#endif
 	IvyInit ("IVYPROBE", "IVYPROBE READY", ApplicationCallback,NULL,NULL,NULL);
 	for  (; optind < argc; optind++)
 		IvyBindMsg (Callback, NULL, argv[optind]);
@@ -247,6 +273,9 @@ int main(int argc, char *argv[])
 #ifdef GTKMAINLOOP
 		IvyGtkChannelSetUp (0, NULL, NULL, HandleStdin);
 #endif
+#ifdef GLUTMAINLOOP
+		IvyGlutChannelSetUp (0, NULL, NULL, HandleStdin);
+#endif
 #ifdef IVYMAINLOOP
 		IvyChannelSetUp (0, NULL, NULL, HandleStdin);
 #endif
@@ -266,6 +295,10 @@ int main(int argc, char *argv[])
 #ifdef GTKMAINLOOP
 	gtk_main();
 #endif
+#ifdef GLUTMAINLOOP
+	glutMainLoop();
+#endif
+
 #ifdef IVYMAINLOOP
 	IvyMainLoop (0);
 #endif
diff --git a/src/ivysocket.c b/src/ivysocket.c
index 9d40f3d..582d227 100644
--- a/src/ivysocket.c
+++ b/src/ivysocket.c
@@ -579,3 +579,39 @@ void SocketSendBroadcast (Client client, unsigned long host, unsigned short port
 		perror ("*** send ***");
 	}	va_end (ap );
 }
+
+/* Socket Multicast */
+
+int SocketAddMember(Client client, unsigned long host )
+{
+	struct ip_mreq imr;
+/*
+Multicast datagrams with initial TTL 0 are restricted to the same host. 
+Multicast datagrams with initial TTL 1 are restricted to the same subnet. 
+Multicast datagrams with initial TTL 32 are restricted to the same site. 
+Multicast datagrams with initial TTL 64 are restricted to the same region. 
+Multicast datagrams with initial TTL 128 are restricted to the same continent. 
+Multicast datagrams with initial TTL 255 are unrestricted in scope. 
+*/
+	unsigned char ttl = 64 ; // Arbitrary TTL value.
+	/* wee need to broadcast */
+
+	imr.imr_multiaddr.s_addr = htonl( host );
+	imr.imr_interface.s_addr = INADDR_ANY; 
+	if(setsockopt(client->fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&imr,sizeof(struct ip_mreq)) == -1 )
+		{
+      	perror("setsockopt() Cannot join group");
+      	fprintf(stderr, "Does your kernel support IP multicast extensions ?\n");
+      	return 0;
+    		}
+				
+  	if(setsockopt(client->fd, IPPROTO_IP, IP_MULTICAST_TTL, (char *)&ttl, sizeof(ttl)) < 0 )
+		{
+      	perror("setsockopt() Cannot set TTL");
+      	fprintf(stderr, "Does your kernel support IP multicast extensions ?\n");
+      	return 0;
+    		}
+
+	return 1;
+}
+
-- 
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