1 // SPDX-License-Identifier: GPL-2.0
34  * batadv_tvlv_handler_release() - release tvlv handler from lists and queue for
47  * batadv_tvlv_handler_put() - decrement the tvlv container refcounter and
56 	kref_put(&tvlv_handler->refcount, batadv_tvlv_handler_release);  in batadv_tvlv_handler_put()
60  * batadv_tvlv_handler_get() - retrieve tvlv handler from the tvlv handler list
61  *  based on the provided type and version (both need to match)
75 				 &bat_priv->tvlv.handler_list, list) {  in batadv_tvlv_handler_get()
76 		if (tvlv_handler_tmp->type != type)  in batadv_tvlv_handler_get()
79 		if (tvlv_handler_tmp->version != version)  in batadv_tvlv_handler_get()
82 		if (!kref_get_unless_zero(&tvlv_handler_tmp->refcount))  in batadv_tvlv_handler_get()
94  * batadv_tvlv_container_release() - release tvlv from lists and free
106  * batadv_tvlv_container_put() - decrement the tvlv container refcounter and
115 	kref_put(&tvlv->refcount, batadv_tvlv_container_release);  in batadv_tvlv_container_put()
119  * batadv_tvlv_container_get() - retrieve tvlv container from the tvlv container
120  *  list based on the provided type and version (both need to match)
135 	lockdep_assert_held(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_get()
137 	hlist_for_each_entry(tvlv_tmp, &bat_priv->tvlv.container_list, list) {  in batadv_tvlv_container_get()
138 		if (tvlv_tmp->tvlv_hdr.type != type)  in batadv_tvlv_container_get()
141 		if (tvlv_tmp->tvlv_hdr.version != version)  in batadv_tvlv_container_get()
144 		kref_get(&tvlv_tmp->refcount);  in batadv_tvlv_container_get()
153  * batadv_tvlv_container_list_size() - calculate the size of the tvlv container
167 	lockdep_assert_held(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_list_size()
169 	hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) {  in batadv_tvlv_container_list_size()
171 		tvlv_len += ntohs(tvlv->tvlv_hdr.len);  in batadv_tvlv_container_list_size()
178  * batadv_tvlv_container_remove() - remove tvlv container from the tvlv
189 	lockdep_assert_held(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_remove()
194 	hlist_del(&tvlv->list);  in batadv_tvlv_container_remove()
202  * batadv_tvlv_container_unregister() - unregister tvlv container based on the
213 	spin_lock_bh(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_unregister()
216 	spin_unlock_bh(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_unregister()
220  * batadv_tvlv_container_register() - register tvlv type, version and content
244 	tvlv_new->tvlv_hdr.version = version;  in batadv_tvlv_container_register()
245 	tvlv_new->tvlv_hdr.type = type;  in batadv_tvlv_container_register()
246 	tvlv_new->tvlv_hdr.len = htons(tvlv_value_len);  in batadv_tvlv_container_register()
248 	memcpy(tvlv_new + 1, tvlv_value, ntohs(tvlv_new->tvlv_hdr.len));  in batadv_tvlv_container_register()
249 	INIT_HLIST_NODE(&tvlv_new->list);  in batadv_tvlv_container_register()
250 	kref_init(&tvlv_new->refcount);  in batadv_tvlv_container_register()
252 	spin_lock_bh(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_register()
256 	kref_get(&tvlv_new->refcount);  in batadv_tvlv_container_register()
257 	hlist_add_head(&tvlv_new->list, &bat_priv->tvlv.container_list);  in batadv_tvlv_container_register()
258 	spin_unlock_bh(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_register()
265  * batadv_tvlv_realloc_packet_buff() - reallocate packet buffer to accommodate
266  *  requested packet size
267  * @packet_buff: packet buffer
268  * @packet_buff_len: packet buffer size
269  * @min_packet_len: requested packet minimum size
270  * @additional_packet_len: requested additional packet size on top of minimum
273  * Return: true of the packet buffer could be changed to the requested size,
298  * batadv_tvlv_container_ogm_append() - append tvlv container content to given
299  *  OGM packet buffer
301  * @packet_buff: ogm packet buffer
302  * @packet_buff_len: ogm packet buffer size including ogm header and tvlv
306  * The ogm packet might be enlarged or shrunk depending on the current size
307  * and the size of the to-be-appended tvlv containers.
321 	spin_lock_bh(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_ogm_append()
335 	hlist_for_each_entry(tvlv, &bat_priv->tvlv.container_list, list) {  in batadv_tvlv_container_ogm_append()
337 		tvlv_hdr->type = tvlv->tvlv_hdr.type;  in batadv_tvlv_container_ogm_append()
338 		tvlv_hdr->version = tvlv->tvlv_hdr.version;  in batadv_tvlv_container_ogm_append()
339 		tvlv_hdr->len = tvlv->tvlv_hdr.len;  in batadv_tvlv_container_ogm_append()
341 		memcpy(tvlv_value, tvlv + 1, ntohs(tvlv->tvlv_hdr.len));  in batadv_tvlv_container_ogm_append()
342 		tvlv_value = (u8 *)tvlv_value + ntohs(tvlv->tvlv_hdr.len);  in batadv_tvlv_container_ogm_append()
346 	spin_unlock_bh(&bat_priv->tvlv.container_list_lock);  in batadv_tvlv_container_ogm_append()
351  * batadv_tvlv_call_handler() - parse the given tvlv buffer to call the
355  * @packet_type: indicates for which packet type the TVLV handler is called
356  * @orig_node: orig node emitting the ogm packet
380 		if (!tvlv_handler->ogm_handler)  in batadv_tvlv_call_handler()
386 		tvlv_handler->ogm_handler(bat_priv, orig_node,  in batadv_tvlv_call_handler()
389 		tvlv_handler->flags |= BATADV_TVLV_HANDLER_OGM_CALLED;  in batadv_tvlv_call_handler()
395 		if (!tvlv_handler->unicast_handler)  in batadv_tvlv_call_handler()
398 		src = ((struct batadv_unicast_tvlv_packet *)skb->data)->src;  in batadv_tvlv_call_handler()
399 		dst = ((struct batadv_unicast_tvlv_packet *)skb->data)->dst;  in batadv_tvlv_call_handler()
401 		return tvlv_handler->unicast_handler(bat_priv, src,  in batadv_tvlv_call_handler()
408 		if (!tvlv_handler->mcast_handler)  in batadv_tvlv_call_handler()
411 		tvlv_offset = (unsigned char *)tvlv_value - skb->data;  in batadv_tvlv_call_handler()
415 		return tvlv_handler->mcast_handler(bat_priv, skb);  in batadv_tvlv_call_handler()
422  * batadv_tvlv_containers_process() - parse the given tvlv buffer to call the
425  * @packet_type: indicates for which packet type the TVLV handler is called
426  * @orig_node: orig node emitting the ogm packet
448 		tvlv_value_cont_len = ntohs(tvlv_hdr->len);  in batadv_tvlv_containers_process()
450 		tvlv_value_len -= sizeof(*tvlv_hdr);  in batadv_tvlv_containers_process()
456 						       tvlv_hdr->type,  in batadv_tvlv_containers_process()
457 						       tvlv_hdr->version);  in batadv_tvlv_containers_process()
465 		tvlv_value_len -= tvlv_value_cont_len;  in batadv_tvlv_containers_process()
474 				 &bat_priv->tvlv.handler_list, list) {  in batadv_tvlv_containers_process()
475 		if (!tvlv_handler->ogm_handler)  in batadv_tvlv_containers_process()
478 		if ((tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) &&  in batadv_tvlv_containers_process()
479 		    !(tvlv_handler->flags & BATADV_TVLV_HANDLER_OGM_CALLED))  in batadv_tvlv_containers_process()
480 			tvlv_handler->ogm_handler(bat_priv, orig_node,  in batadv_tvlv_containers_process()
483 		tvlv_handler->flags &= ~BATADV_TVLV_HANDLER_OGM_CALLED;  in batadv_tvlv_containers_process()
491  * batadv_tvlv_ogm_receive() - process an incoming ogm and call the appropriate
494  * @batadv_ogm_packet: ogm packet containing the tvlv containers
495  * @orig_node: orig node emitting the ogm packet
507 	tvlv_value_len = ntohs(batadv_ogm_packet->tvlv_len);  in batadv_tvlv_ogm_receive()
518  * batadv_tvlv_handler_register() - register tvlv handler based on the provided
525  *  source & destination of the unicast packet as well as the tvlv content
527  * @mptr: multicast packet tvlv handler callback function. This function
551 	spin_lock_bh(&bat_priv->tvlv.handler_list_lock);  in batadv_tvlv_handler_register()
555 		spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);  in batadv_tvlv_handler_register()
562 		spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);  in batadv_tvlv_handler_register()
566 	tvlv_handler->ogm_handler = optr;  in batadv_tvlv_handler_register()
567 	tvlv_handler->unicast_handler = uptr;  in batadv_tvlv_handler_register()
568 	tvlv_handler->mcast_handler = mptr;  in batadv_tvlv_handler_register()
569 	tvlv_handler->type = type;  in batadv_tvlv_handler_register()
570 	tvlv_handler->version = version;  in batadv_tvlv_handler_register()
571 	tvlv_handler->flags = flags;  in batadv_tvlv_handler_register()
572 	kref_init(&tvlv_handler->refcount);  in batadv_tvlv_handler_register()
573 	INIT_HLIST_NODE(&tvlv_handler->list);  in batadv_tvlv_handler_register()
575 	kref_get(&tvlv_handler->refcount);  in batadv_tvlv_handler_register()
576 	hlist_add_head_rcu(&tvlv_handler->list, &bat_priv->tvlv.handler_list);  in batadv_tvlv_handler_register()
577 	spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);  in batadv_tvlv_handler_register()
584  * batadv_tvlv_handler_unregister() - unregister tvlv handler based on the
600 	spin_lock_bh(&bat_priv->tvlv.handler_list_lock);  in batadv_tvlv_handler_unregister()
601 	hlist_del_rcu(&tvlv_handler->list);  in batadv_tvlv_handler_unregister()
602 	spin_unlock_bh(&bat_priv->tvlv.handler_list_lock);  in batadv_tvlv_handler_unregister()
607  * batadv_tvlv_unicast_send() - send a unicast packet with tvlv payload to the
610  * @src: source mac address of the unicast packet
611  * @dst: destination mac address of the unicast packet
639 	skb->priority = TC_PRIO_CONTROL;  in batadv_tvlv_unicast_send()
643 	unicast_tvlv_packet->packet_type = BATADV_UNICAST_TVLV;  in batadv_tvlv_unicast_send()
644 	unicast_tvlv_packet->version = BATADV_COMPAT_VERSION;  in batadv_tvlv_unicast_send()
645 	unicast_tvlv_packet->ttl = BATADV_TTL;  in batadv_tvlv_unicast_send()
646 	unicast_tvlv_packet->reserved = 0;  in batadv_tvlv_unicast_send()
647 	unicast_tvlv_packet->tvlv_len = htons(tvlv_len);  in batadv_tvlv_unicast_send()
648 	unicast_tvlv_packet->align = 0;  in batadv_tvlv_unicast_send()
649 	ether_addr_copy(unicast_tvlv_packet->src, src);  in batadv_tvlv_unicast_send()
650 	ether_addr_copy(unicast_tvlv_packet->dst, dst);  in batadv_tvlv_unicast_send()
654 	tvlv_hdr->version = version;  in batadv_tvlv_unicast_send()
655 	tvlv_hdr->type = type;  in batadv_tvlv_unicast_send()
656 	tvlv_hdr->len = htons(tvlv_value_len);  in batadv_tvlv_unicast_send()