#ifndef _NETINET_IGMP_H_
#define _NETINET_IGMP_H_

#ifndef _SYS_TYPES_H_
#include <sys/types.h>
#endif

#ifndef _NETINET_IN_H_
#include <netinet/in.h>
#endif

/*
 * IGMP packet format.
 */
struct igmp {
	u_char		igmp_type;	/* version & type of IGMP message  */
	u_char		igmp_code;	/* subtype for routing msgs        */
	u_short		igmp_cksum;	/* IP-style checksum               */
	struct in_addr	igmp_group;	/* group address being reported    */
};					/*  (zero for queries)             */

#define IGMP_MINLEN		     8

/*
 * Message types, including version number.
 */
#define IGMP_HOST_MEMBERSHIP_QUERY   0x11	/* Host membership query    */
#define IGMP_HOST_MEMBERSHIP_REPORT  0x12	/* Old membership report    */
#define IGMP_DVMRP		     0x13	/* DVMRP routing message    */
#define IGMP_PIM		     0x14	/* PIM routing message	    */

#define IGMP_HOST_NEW_MEMBERSHIP_REPORT 0x16	/* New membership report    */

#define IGMP_HOST_LEAVE_MESSAGE      0x17	/* Leave-group message	    */

#define IGMP_MTRACE_RESP	     0x1e   /* traceroute resp. (to sender) */
#define IGMP_MTRACE		     0x1f   /* mcast traceroute messages    */

#define IGMP_MAX_HOST_REPORT_DELAY   10     /* max delay for response to    */
					    /* query (in seconds)	    */

#define IGMP_TIMER_SCALE     10	    /* denotes that the igmp->timer filed */
				    /*specifies time in tenths of seconds */

/*
 * States for the IGMPv2 state table
 */
#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 

/*
 * We must remember whether the querier is an old or a new router.
 */
#define IGMP_OLD_ROUTER                          0
#define IGMP_NEW_ROUTER                          1

/*
 * Revert to new router if we haven't heard from an old router in
 * this amount of time.
 */
#define IGMP_AGE_THRESHOLD		         540 

#endif /* _NETINET_IGMP_H_ */