sys/netgraph/ng_tee.c

47  * It has 4 hooks: left, right, left2right, and right2left. Data
50  * and duplicated on left2right. Data entering from left2right is
77 	struct hookinfo		left2right;
183 		privdata->left2right.dest = hinfo;
191 		hinfo = &privdata->left2right;
239 				bcopy(&sc->left2right.stats, &stats->left2right,
240 				    sizeof(stats->left2right));
249 				bzero(&sc->left2right.stats,
250 				    sizeof(sc->left2right.stats));
285  * Data coming in right2left or left2right is forwarded
385 	if (sc->left2right.dest == hinfo)
386 		sc->left2right.dest = NULL;