5 /*-
6  * SPDX-License-Identifier: BSD-3-Clause AND BSD-2-Clause
35  * Copyright (c) 1996-2000 Whistle Communications, Inc.
53  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
69  * ng_gif(4) netgraph node type
93 #define IFP2NG(ifp)  ((struct ng_node *)((struct gif_softc *)(ifp->if_softc))->gif_netgraph)
94 #define IFP2NG_SET(ifp, val)  (((struct gif_softc *)(ifp->if_softc))->gif_netgraph = (val))
96 /* Per-node private data */
98 	struct ifnet	*ifp;		/* associated interface */
111 static void	ng_gif_input2(node_p node, struct mbuf **mp, int af);
113 static int	ng_gif_rcv_lower(node_p node, struct mbuf *m);
115 /* Netgraph node methods */
165  * Handle a packet that has come in on an interface. We get to
171 	const node_p node = IFP2NG(ifp);  in ng_gif_input()  local
172 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_input()
175 	if (priv->lower == NULL || priv->lowerOrphan)  in ng_gif_input()
177 	ng_gif_input2(node, mp, af);  in ng_gif_input()
181  * Handle a packet that has come in on an interface, and which
187 	const node_p node = IFP2NG(ifp);  in ng_gif_input_orphan()  local
188 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_input_orphan()
191 	if (priv->lower == NULL || !priv->lowerOrphan) {  in ng_gif_input_orphan()
195 	ng_gif_input2(node, &m, af);  in ng_gif_input_orphan()
201  * Handle a packet that has come in on a gif interface.
205 ng_gif_input2(node_p node, struct mbuf **mp, int af)  in ng_gif_input2()  argument
207 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_input2()
215 	NG_SEND_DATA_ONLY(error, priv->lower, *mp);  in ng_gif_input2()
220  * A new gif interface has been attached.
221  * Create a new node for it, etc.
227 	node_p node;  in ng_gif_attach()  local
229 	/* Create node */  in ng_gif_attach()
230 	KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __func__));  in ng_gif_attach()
231 	if (ng_make_node_common(&ng_gif_typestruct, &node) != 0) {  in ng_gif_attach()
233 		    __func__, "create node", ifp->if_xname);  in ng_gif_attach()
241 		    __func__, "allocate memory", ifp->if_xname);  in ng_gif_attach()
242 		NG_NODE_UNREF(node);  in ng_gif_attach()
245 	NG_NODE_SET_PRIVATE(node, priv);  in ng_gif_attach()
246 	priv->ifp = ifp;  in ng_gif_attach()
247 	IFP2NG_SET(ifp, node);  in ng_gif_attach()
249 	/* Try to give the node the same name as the interface */  in ng_gif_attach()
250 	if (ng_name_node(node, ifp->if_xname) != 0) {  in ng_gif_attach()
251 		log(LOG_WARNING, "%s: can't name node %s\n",  in ng_gif_attach()
252 		    __func__, ifp->if_xname);  in ng_gif_attach()
257  * An interface is being detached.
258  * REALLY Destroy its node.
263 	const node_p node = IFP2NG(ifp);  in ng_gif_detach()  local
266 	if (node == NULL)		/* no node (why not?), ignore */  in ng_gif_detach()
268 	priv = NG_NODE_PRIVATE(node);  in ng_gif_detach()
269 	NG_NODE_REALLY_DIE(node);	/* Force real removal of node */  in ng_gif_detach()
276 	priv->ifp = NULL;	/* XXX race if interrupted an output packet */  in ng_gif_detach()
277 	ng_rmnode_self(node);		/* remove all netgraph parts */  in ng_gif_detach()
302 	 * big lump. The next node will do an m_pullup()  in ng_gif_glue_af()
327 		    NETGRAPH NODE METHODS
331  * It is not possible or allowable to create a node of this type.
332  * Nodes get created when the interface is attached (or, when
333  * this node type's KLD is loaded).
336 ng_gif_constructor(node_p node)  in ng_gif_constructor()  argument
345 ng_gif_newhook(node_p node, hook_p hook, const char *name)  in ng_gif_newhook()  argument
347 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_newhook()
348 	u_char orphan = priv->lowerOrphan;  in ng_gif_newhook()
357 		hookptr = &priv->lower;  in ng_gif_newhook()
360 		hookptr = &priv->lower;  in ng_gif_newhook()
371 	priv->lowerOrphan = orphan;  in ng_gif_newhook()
391 ng_gif_rcvmsg(node_p node, item_p item, hook_p lasthook)  in ng_gif_rcvmsg()  argument
393 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_rcvmsg()
399 	switch (msg->header.typecookie) {  in ng_gif_rcvmsg()
401 		switch (msg->header.cmd) {  in ng_gif_rcvmsg()
408 			strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ);  in ng_gif_rcvmsg()
416 			*((u_int32_t *)resp->data) = priv->ifp->if_index;  in ng_gif_rcvmsg()
427 	NG_RESPOND_MSG(error, node, item, resp);  in ng_gif_rcvmsg()
438 	const node_p node = NG_HOOK_NODE(hook);  in ng_gif_rcvdata()  local
439 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_rcvdata()
445 	if (hook == priv->lower)  in ng_gif_rcvdata()
446 		return ng_gif_rcv_lower(node, m);  in ng_gif_rcvdata()
454 ng_gif_rcv_lower(node_p node, struct mbuf *m)  in ng_gif_rcv_lower()  argument
457 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_rcv_lower()
462 	if (m->m_pkthdr.len < sizeof(sa_family_t)) {  in ng_gif_rcv_lower()
466 	if (m->m_len < sizeof(sa_family_t)  in ng_gif_rcv_lower()
480 	return gif_output(priv->ifp, m, &dst, NULL);  in ng_gif_rcv_lower()
484  * Shutdown node. This resets the node but does not remove it
488 ng_gif_shutdown(node_p node)  in ng_gif_shutdown()  argument
490 	const priv_p priv = NG_NODE_PRIVATE(node);  in ng_gif_shutdown()
492 	if (node->nd_flags & NGF_REALLY_DIE) {  in ng_gif_shutdown()
494 		 * WE came here because the gif interface is being destroyed,  in ng_gif_shutdown()
499 		NG_NODE_SET_PRIVATE(node, NULL);  in ng_gif_shutdown()
501 		NG_NODE_UNREF(node);	/* free node itself */  in ng_gif_shutdown()
504 	NG_NODE_REVIVE(node);		/* Signal ng_rmnode we are persisant */  in ng_gif_shutdown()
516 	if (hook == priv->lower) {  in ng_gif_disconnect()
517 		priv->lower = NULL;  in ng_gif_disconnect()
518 		priv->lowerOrphan = 0;  in ng_gif_disconnect()
523 		ng_rmnode_self(NG_HOOK_NODE(hook));	/* reset node */  in ng_gif_disconnect()
533  * Handle loading and unloading for this node type.
555 		/* Create nodes for any already-existing gif interfaces */  in ng_gif_mod_event()
561 				if (ifp->if_type == IFT_GIF)  in ng_gif_mod_event()