6 /*-
7  * Copyright (c) 1996-1999 Whistle Communications, Inc.
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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
177 		hinfo = &privdata->right;  in ng_tee_newhook()
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()
181 		privdata->right2left.dest = hinfo;  in ng_tee_newhook()
183 		hinfo = &privdata->left;  in ng_tee_newhook()
184 		if (privdata->right.dest)  in ng_tee_newhook()
185 			privdata->right.dup = privdata->right.dest;  in ng_tee_newhook()
186 		privdata->right.dest = hinfo;  in ng_tee_newhook()
187 		privdata->left2right.dest = hinfo;  in ng_tee_newhook()
189 		hinfo = &privdata->right2left;  in ng_tee_newhook()
190 		if (privdata->right.dest)  in ng_tee_newhook()
191 			privdata->right.dup = hinfo;  in ng_tee_newhook()
193 			privdata->right.dest = hinfo;  in ng_tee_newhook()
195 		hinfo = &privdata->left2right;  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()
202 	hinfo->hook = hook;  in ng_tee_newhook()
203 	bzero(&hinfo->stats, sizeof(hinfo->stats));  in ng_tee_newhook()
220 	switch (msg->header.typecookie) {  in ng_tee_rcvmsg()
222 		switch (msg->header.cmd) {  in ng_tee_rcvmsg()
229                         if (msg->header.cmd != NGM_TEE_CLR_STATS) {  in ng_tee_rcvmsg()
236 				stats = (struct ng_tee_stats *)resp->data;  in ng_tee_rcvmsg()
237 				bcopy(&sc->right.stats, &stats->right,  in ng_tee_rcvmsg()
238 				    sizeof(stats->right));  in ng_tee_rcvmsg()
239 				bcopy(&sc->left.stats, &stats->left,  in ng_tee_rcvmsg()
240 				    sizeof(stats->left));  in ng_tee_rcvmsg()
241 				bcopy(&sc->right2left.stats, &stats->right2left,  in ng_tee_rcvmsg()
242 				    sizeof(stats->right2left));  in ng_tee_rcvmsg()
243 				bcopy(&sc->left2right.stats, &stats->left2right,  in ng_tee_rcvmsg()
244 				    sizeof(stats->left2right));  in ng_tee_rcvmsg()
246                         if (msg->header.cmd != NGM_TEE_GET_STATS) {  in ng_tee_rcvmsg()
247 				bzero(&sc->right.stats,  in ng_tee_rcvmsg()
248 				    sizeof(sc->right.stats));  in ng_tee_rcvmsg()
249 				bzero(&sc->left.stats,  in ng_tee_rcvmsg()
250 				    sizeof(sc->left.stats));  in ng_tee_rcvmsg()
251 				bzero(&sc->right2left.stats,  in ng_tee_rcvmsg()
252 				    sizeof(sc->right2left.stats));  in ng_tee_rcvmsg()
253 				bzero(&sc->left2right.stats,  in ng_tee_rcvmsg()
254 				    sizeof(sc->left2right.stats));  in ng_tee_rcvmsg()
264 		if (lasthook == sc->left.hook || lasthook == sc->right.hook)  {  in ng_tee_rcvmsg()
266 			if (hinfo && hinfo->dest) {  in ng_tee_rcvmsg()
268 				NG_FWD_ITEM_HOOK(error, item, hinfo->dest->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.
304 	hinfo->stats.inOctets += m->m_pkthdr.len;  in ng_tee_rcvdata()
305 	hinfo->stats.inFrames++;  in ng_tee_rcvdata()
308 	if (hinfo->dup) {  in ng_tee_rcvdata()
315 			h = hinfo->dup;  in ng_tee_rcvdata()
316 			NG_SEND_DATA_ONLY(error, h->hook, m2);  in ng_tee_rcvdata()
318 				h->stats.outOctets += m->m_pkthdr.len;  in ng_tee_rcvdata()
319 				h->stats.outFrames++;  in ng_tee_rcvdata()
324 	if (hinfo->dest) {  in ng_tee_rcvdata()
325 		h = hinfo->dest;  in ng_tee_rcvdata()
326 		h->stats.outOctets += m->m_pkthdr.len;  in ng_tee_rcvdata()
327 		h->stats.outFrames++;  in ng_tee_rcvdata()
328 		NG_FWD_ITEM_HOOK(error, item, h->hook);  in ng_tee_rcvdata()
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()
376 	hinfo->hook = NULL;  in ng_tee_disconnect()
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()
384 	if (sc->right.dest == hinfo) {  in ng_tee_disconnect()
385 		sc->right.dest = sc->right.dup;  in ng_tee_disconnect()
386 		sc->right.dup = NULL;  in ng_tee_disconnect()
387 	} else if (sc->right.dup == hinfo)  in ng_tee_disconnect()
388 		sc->right.dup = NULL;  in ng_tee_disconnect()
389 	if (sc->left2right.dest == hinfo)  in ng_tee_disconnect()
390 		sc->left2right.dest = NULL;  in ng_tee_disconnect()
391 	if (sc->right2left.dest == hinfo)  in ng_tee_disconnect()
392 		sc->right2left.dest = NULL;  in ng_tee_disconnect()