Initial get-the-easy-case-working upgrade of the multicast code

to something more recent than the ancient 1.2 release contained in
4.4.  This code has the following advantages as compared to
previous versions (culled from the README file for the SunOS release):

- True multicast delivery
- Configurable rate-limiting of forwarded multicast traffic on each
  physical interface or tunnel, using a token-bucket limiter.
- Simplistic classification of packets for prioritized dropping.
- Administrative scoping of multicast address ranges.
- Faster detection of hosts leaving groups.
- Support for multicast traceroute (code not yet available).
- Support for RSVP, the Resource Reservation Protocol.

What still needs to be done:

- The multicast forwarder needs testing.
- The multicast routing daemon needs to be ported.
- Network interface drivers need to have the `#ifdef MULTICAST' goop ripped
  out of them.
- The IGMP code should probably be bogon-tested.

Some notes about the porting process:

In some cases, the Berkeley people decided to incorporate functionality from
later releases of the multicast code, but then had to do things differently.
As a result, if you look at Deering's patches, and then look at
our code, it is not always obvious whether the patch even applies.  Let
the reader beware.

I ran ip_mroute.c through several passes of `unifdef' to get rid of
useless grot, and to permanently enable the RSVP support, which we will
include as standard.

Ported by: 	Garrett Wollman
Submitted by:	Steve Deering and Ajit Thyagarajan (among others)

1 files changed, 31 insertions, 3 deletions

diff --git a/sys/netinet/igmp.h b/sys/netinet/igmp.h
index 52c672b..1e082c4 100644
--- a/sys/netinet/igmp.h
+++ b/sys/netinet/igmp.h
@@ -35,13 +35,19 @@
  * SUCH DAMAGE.
  *
  *	@(#)igmp.h	8.1 (Berkeley) 6/10/93
- * $Id: igmp.h,v 1.2 1994/08/02 07:48:07 davidg Exp $
+ * $Id: igmp.h,v 1.3 1994/08/21 05:27:25 paul Exp $
  */
 
 #ifndef _NETINET_IGMP_H_
 #define _NETINET_IGMP_H_
 
-/* Internet Group Management Protocol (IGMP) definitions. */
+/*
+ * Internet Group Management Protocol (IGMP) definitions.
+ *
+ * Written by Steve Deering, Stanford, May 1988.
+ *
+ * MULTICAST 1.2
+ */
 
 /*
  * IGMP packet format.
@@ -59,7 +65,29 @@ struct igmp {
 #define IGMP_HOST_MEMBERSHIP_REPORT  0x12
 #define IGMP_DVMRP		     0x13  /* for experimental multicast   */
 					   /*  routing protocol            */
+#define IGMP_HOST_NEW_MEMBERSHIP_REPORT 0x16
+#define IGMP_HOST_LEAVE_MESSAGE      0x17
+#define IGMP_MTRACE		     0x1f  /* mcast traceroute messages    */
+#define IGMP_MTRACE_RESP	     0x1e  /* traceroute resp. (to sender) */
 
 #define IGMP_MAX_HOST_REPORT_DELAY   10    /* max delay for response to    */
+#define IGMP_TIMER_SCALE     10	    /* denotes that the igmp->timer filed */
+				    /*specifies time in 10th os seconds */
+
+#define IGMP_DELAYING_MEMBER                     1
+#define IGMP_IDLE_MEMBER                         2
+#define IGMP_LAZY_MEMBER                         3 
+#define IGMP_SLEEPING_MEMBER                     4 
+#define IGMP_AWAKENING_MEMBER                    5 
+
+
+#define IGMP_OLD_ROUTER                          0
+#define IGMP_NEW_ROUTER                          1
+
+#define IGMP_AGE_THRESHOLD		         540 
 
-#endif
+#ifdef IGMP_STATES
+static char *tostate[]={"","DELAYING_MEMBER","IDLE","LAZY","SLEEPING",
+			"AWAKENING" };
+#endif /* IGMP_STATES */
+#endif /* _NETINET_IGMP_H_ */