45  * It has 4 hooks: left, right, left2right, and right2left. Data
46  * entering from the right is passed to the left and duplicated on
47  * right2left, and data entering from the left is passed to the right
49  * sent to left, and data from right2left to right.
79 	struct hookinfo		left;  member
178 		if (privdata->left.dest)  in ng_tee_newhook()
179 			privdata->left.dup = privdata->left.dest;  in ng_tee_newhook()
180 		privdata->left.dest = hinfo;  in ng_tee_newhook()
183 		hinfo = &privdata->left;  in ng_tee_newhook()
196 		if (privdata->left.dest)  in ng_tee_newhook()
197 			privdata->left.dup = hinfo;  in ng_tee_newhook()
199 			privdata->left.dest = hinfo;  in ng_tee_newhook()
239 				bcopy(&sc->left.stats, &stats->left,  in ng_tee_rcvmsg()
240 				    sizeof(stats->left));  in ng_tee_rcvmsg()
249 				bzero(&sc->left.stats,  in ng_tee_rcvmsg()
250 				    sizeof(sc->left.stats));  in ng_tee_rcvmsg()
264 		if (lasthook == sc->left.hook || lasthook == sc->right.hook)  {  in ng_tee_rcvmsg()
287  * send the original onwards out through the left link.
288  * Do the opposite for data coming in from the left link.
337  * If we have both a left and right hook, then we probably want to extricate
346 	if (privdata->left.hook && privdata->right.hook)  in ng_tee_close()
347 		ng_bypass(privdata->left.hook, privdata->right.hook);  in ng_tee_close()
379 	if (sc->left.dest == hinfo) {  in ng_tee_disconnect()
380 		sc->left.dest = sc->left.dup;  in ng_tee_disconnect()
381 		sc->left.dup = NULL;  in ng_tee_disconnect()
382 	} else if (sc->left.dup == hinfo)  in ng_tee_disconnect()
383 		sc->left.dup = NULL;  in ng_tee_disconnect()