42  * algorithm is included which disables a link for priv->conf.loopTimeout
43  * seconds when a host is seen to have jumped from one link to
48  * tell us on which link the host may be found. A host's entry will
89 	counter_u64_t	recvOctets;	/* total octets rec'd on link */
90 	counter_u64_t	recvPackets;	/* total pkts rec'd on link */
91 	counter_u64_t	recvMulticasts;	/* multicast pkts rec'd on link */
92 	counter_u64_t	recvBroadcasts;	/* broadcast pkts rec'd on link */
96 	counter_u64_t	xmitOctets;	/* total octets xmit'd on link */
97 	counter_u64_t	xmitPackets;	/* total pkts xmit'd on link */
98 	counter_u64_t	xmitMulticasts;	/* multicast pkts xmit'd on link */
99 	counter_u64_t	xmitBroadcasts;	/* broadcast pkts xmit'd on link */
105 /* Per-link private data */
111 	struct ng_bridge_link_kernel_stats stats;	/* link stats */
127 	struct unrhdr 		*linkUnit;	/* link unit number allocator */
136 	link_p		link;		/* link where addr can be found */  member
145 /* [up]link prefix matching */
170 static void	ng_bridge_free_link(link_p link);
172 static int	ng_bridge_put(priv_p priv, const u_char *addr, link_p link);
174 static void	ng_bridge_remove_hosts(priv_p priv, link_p link);
389 	link_p link;  in ng_bridge_newhook()  local
428 	link = malloc(sizeof(*link), M_NETGRAPH_BRIDGE, M_NOWAIT | M_ZERO);  in ng_bridge_newhook()
429 	if (link == NULL) {  in ng_bridge_newhook()
435 	link->stats.f = counter_u64_alloc(M_NOWAIT);	\  in ng_bridge_newhook()
436 	if (link->stats.f == NULL)			\  in ng_bridge_newhook()
454 	link->hook = hook;  in ng_bridge_newhook()
456 		link->learnMac = 0;  in ng_bridge_newhook()
457 		link->sendUnknown = 1;  in ng_bridge_newhook()
458 		if (priv->numLinks == 0)	/* if the first link is an uplink */  in ng_bridge_newhook()
461 		link->learnMac = 1;  in ng_bridge_newhook()
462 		link->sendUnknown = priv->sendUnknown;  in ng_bridge_newhook()
465 	NG_HOOK_SET_PRIVATE(hook, link);  in ng_bridge_newhook()
471 	ng_bridge_free_link(link);  in ng_bridge_newhook()
498 ng_bridge_free_link(link_p link)  in ng_bridge_free_link()  argument
500 	counter_u64_free(link->stats.recvOctets);  in ng_bridge_free_link()
501 	counter_u64_free(link->stats.recvPackets);  in ng_bridge_free_link()
502 	counter_u64_free(link->stats.recvMulticasts);  in ng_bridge_free_link()
503 	counter_u64_free(link->stats.recvBroadcasts);  in ng_bridge_free_link()
504 	counter_u64_free(link->stats.recvUnknown);  in ng_bridge_free_link()
505 	counter_u64_free(link->stats.recvRunts);  in ng_bridge_free_link()
506 	counter_u64_free(link->stats.recvInvalid);  in ng_bridge_free_link()
507 	counter_u64_free(link->stats.xmitOctets);  in ng_bridge_free_link()
508 	counter_u64_free(link->stats.xmitPackets);  in ng_bridge_free_link()
509 	counter_u64_free(link->stats.xmitMulticasts);  in ng_bridge_free_link()
510 	counter_u64_free(link->stats.xmitBroadcasts);  in ng_bridge_free_link()
511 	counter_u64_free(link->stats.loopDrops);  in ng_bridge_free_link()
512 	counter_u64_free(link->stats.memoryFailures);  in ng_bridge_free_link()
513 	free(link, M_NETGRAPH_BRIDGE);  in ng_bridge_free_link()
579 			link_p link;  in ng_bridge_rcvmsg()  local
583 			/* Get link number */  in ng_bridge_rcvmsg()
600 			link = NG_HOOK_PRIVATE(hook);  in ng_bridge_rcvmsg()
607 				    sizeof(link->stats), M_NOWAIT);  in ng_bridge_rcvmsg()
613 #define FETCH(x)	rs->x = counter_u64_fetch(link->stats.x)  in ng_bridge_rcvmsg()
626 				rs->loopDetects = link->stats.loopDetects;  in ng_bridge_rcvmsg()
631 				ng_bridge_clear_link_stats(&link->stats);  in ng_bridge_rcvmsg()
656 						NG_HOOK_NAME(host->link->hook),  in ng_bridge_rcvmsg()
764 	/* Skip incoming link */  in ng_bridge_send_ctx()
775 		 * This is the first usable link we have found.  in ng_bridge_send_ctx()
784 	 * It's usable link but not the reserved (first) one.  in ng_bridge_send_ctx()
833 	/* Is link disabled due to a loopback condition? */  in ng_bridge_rcvdata()
862 	    (host != NULL && host->link != ctx.incoming)) {  in ng_bridge_rcvdata()
885 	if (host != NULL && host->link != ctx.incoming) {  in ng_bridge_rcvdata()
896 	 * If unicast and destination host known, deliver to host's link,  in ng_bridge_rcvdata()
897 	 * unless it is the same link as the packet came in on.  in ng_bridge_rcvdata()
900 		/* Determine packet destination link */  in ng_bridge_rcvdata()
902 			link_p destLink = host->link;  in ng_bridge_rcvdata()
904 			/* If destination same as incoming link, do nothing */  in ng_bridge_rcvdata()
911 			/* Deliver packet out the destination link */  in ng_bridge_rcvdata()
922 	/* Finally send out on the first link found */  in ng_bridge_rcvdata()
971 	link_p link = NG_HOOK_PRIVATE(hook);  in ng_bridge_disconnect()  local
975 	/* Remove all hosts associated with this link */  in ng_bridge_disconnect()
976 	ng_bridge_remove_hosts(priv, link);  in ng_bridge_disconnect()
978 	/* Free associated link information */  in ng_bridge_disconnect()
979 	ng_bridge_free_link(link);  in ng_bridge_disconnect()
1023  * to the new link. Returns 0 on success.
1026 ng_bridge_put(priv_p priv, const u_char *addr, link_p link)  in ng_bridge_put()  argument
1032 		/* Host already on the correct link? */  in ng_bridge_put()
1033 		if (host->link == link)  in ng_bridge_put()
1036 		/* Move old host over to new link */  in ng_bridge_put()
1038 			host->link = link;  in ng_bridge_put()
1043 		 * If the host was recently moved to the old link and  in ng_bridge_put()
1044 		 * it's now jumping to a new link, declare a loopback  in ng_bridge_put()
1051 			NG_HOOK_NAME(link->hook));  in ng_bridge_put()
1053 		/* Mark link as linka non grata */  in ng_bridge_put()
1054 		link->loopCount = priv->conf.loopTimeout;  in ng_bridge_put()
1055 		link->stats.loopDetects++;  in ng_bridge_put()
1057 		/* Forget all hosts on this link */  in ng_bridge_put()
1058 		ng_bridge_remove_hosts(priv, link);  in ng_bridge_put()
1067 	host->link = link;  in ng_bridge_put()
1157  * Remove all hosts associated with a specific link from the hashtable.
1161 ng_bridge_remove_hosts(priv_p priv, link_p link)  in ng_bridge_remove_hosts()  argument
1171 			if (link == NULL || host->link == link) {  in ng_bridge_remove_hosts()
1183  * we decrement link->loopCount for those links being muted due to
1190 	link_p link = NG_HOOK_PRIVATE(hook);  in ng_bridge_unmute()  local
1195 	if (link->loopCount != 0) {  in ng_bridge_unmute()
1196 		link->loopCount--;  in ng_bridge_unmute()
1197 		if (link->loopCount == 0 && priv->conf.debugLevel >= 2) {  in ng_bridge_unmute()