sys/netgraph/ng_bridge.c

48  * algorithm is included which disables a link for priv->conf.loopTimeout
49  * seconds when a host is seen to have jumped from one link to
54  * tell us on which link the host may be found. A host's entry will
94 /* Per-link private data */
98 	struct ng_bridge_link_stats	stats;		/* link stats */
145 /* Store each hook's link number in the private field */
354 	/* Check for a link hook */
449 			struct ng_bridge_link *link;
452 			/* Get link number */
462 			if ((link = priv->links[linkNum]) == NULL) {
470 				    sizeof(link->stats), M_NOWAIT);
475 				bcopy(&link->stats,
476 				    resp->data, sizeof(link->stats));
479 				bzero(&link->stats, sizeof(link->stats));
532 	struct ng_bridge_link *link;
540 	/* Get link number */
544 	link = priv->links[linkNum];
545 	KASSERT(link != NULL, ("%s: link%d null", __func__, linkNum));
549 		link->stats.recvRunts++;
555 		link->stats.memoryFailures++;
561 		link->stats.recvInvalid++;
567 	/* Is link disabled due to a loopback condition? */
568 	if (link->loopCount != 0) {
569 		link->stats.loopDrops++;
576 	link->stats.recvPackets++;
577 	link->stats.recvOctets += m->m_pkthdr.len;
580 			link->stats.recvBroadcasts++;
583 			link->stats.recvMulticasts++;
592 		/* Did host jump to a different link? */
596 			 * If the host's old link was recently established
597 			 * on the old link and it's already jumped to a new
598 			 * link, declare a loopback condition.
618 				/* Mark link as linka non grata */
619 				link->loopCount = priv->conf.loopTimeout;
620 				link->stats.loopDetects++;
622 				/* Forget all hosts on this link */
626 				link->stats.loopDrops++;
632 			/* Move host over to new link */
638 			link->stats.memoryFailures++;
653 	 * If unicast and destination host known, deliver to host's link,
654 	 * unless it is the same link as the packet came in on.
658 		/* Determine packet destination link */
663 			/* If destination same as incoming link, do nothing */
665 			    ("%s: link%d null", __func__, host->linkNum));
666 			if (destLink == link) {
672 			/* Deliver packet out the destination link */
680 		link->stats.recvUnknown++;
691 		 * send the original on its reserved link
694 			/* If we never saw a good link, leave. */
705 			/* Skip incoming link and disconnected links */
706 			if (destLink == NULL || destLink == link) {
711 				 * This is the first usable link we have found.
720 			 * It's usable link but not the reserved (first) one.
725 				link->stats.memoryFailures++;
750 			 * on the first link we found.
796 	/* Get link number */
801 	/* Remove all hosts associated with this link */
804 	/* Free associated link information */
805 	KASSERT(priv->links[linkNum] != NULL, ("%s: no link", __func__));
947  * Remove all hosts associated with a specific link from the hashtable.
973  * we decrement link->loopCount for those links being muted due to
992 			/* Make sure host's link really exists */
994 			    ("%s: host %6D on nonexistent link %d\n",
1019 		struct ng_bridge_link *const link = priv->links[linkNum];
1021 		if (link != NULL) {
1022 			if (link->loopCount != 0) {
1023 				link->loopCount--;
1024 				if (link->loopCount == 0
1027 					    " restoring looped back link%d\n",