23 struct gtable {  struct
24     struct gtable  *gt_next;		/* pointer to the next entry	    */  argument
25     struct gtable  *gt_prev;		/* back pointer for linked list	    */  argument
26     struct gtable  *gt_gnext;		/* fwd pointer for group list	    */  argument
27     struct gtable  *gt_gprev;		/* rev pointer for group list	    */  argument
28     u_int32_t	    gt_mcastgrp;	/* multicast group associated       */
29     vifbitmap_t     gt_scope;		/* scoped interfaces                */
30     u_char	    gt_ttls[MAXVIFS];	/* ttl vector for forwarding        */
31     vifbitmap_t	    gt_grpmems;		/* forw. vifs for src, grp          */
32     int		    gt_prsent_timer;	/* prune timer for this group	    */
33     int  	    gt_timer;		/* timer for this group entry	    */
34     time_t 	    gt_ctime;		/* time of entry creation         */
35     u_char	    gt_grftsnt;		/* graft sent/retransmit timer	    */
36     struct stable  *gt_srctbl;		/* source table			    */
37     struct ptable  *gt_pruntbl;		/* prune table			    */
38     struct rtentry *gt_route;		/* parent route			    */
40     struct rsrr_cache *gt_rsrr_cache;	/* RSRR cache                       */