net/llc/llc_sap.c

89  *	@sap: pointer to SAP
92 void llc_sap_rtn_pdu(struct llc_sap *sap, struct sk_buff *skb)
110  *	@sap: pointer to SAP
117 static struct llc_sap_state_trans *llc_find_sap_trans(struct llc_sap *sap,
123 	struct llc_sap_state *curr_state = &llc_sap_state_table[sap->state - 1];
129 		if (!next_trans[i]->ev(sap, skb)) {
138  *	@sap: pointer to SAP
145 static int llc_exec_sap_trans_actions(struct llc_sap *sap,
153 		if ((*next_action)(sap, skb))
160  *	@sap: pointer to SAP
167 static int llc_sap_next_state(struct llc_sap *sap, struct sk_buff *skb)
172 	if (sap->state > LLC_NR_SAP_STATES)
174 	trans = llc_find_sap_trans(sap, skb);
182 	rc = llc_exec_sap_trans_actions(sap, trans, skb);
188 	sap->state = trans->next_state;
195  *	@sap: sap to use
204 static void llc_sap_state_process(struct llc_sap *sap, struct sk_buff *skb)
209 	llc_sap_next_state(sap, skb);
223  *	@sap: sap to use
226  *	@dsap: destination sap
231 void llc_build_and_send_test_pkt(struct llc_sap *sap,
236 	ev->saddr.lsap = sap->laddr.lsap;
244 	llc_sap_state_process(sap, skb);
249  *	@sap: sap to use
252  *	@dsap: destination sap
257 void llc_build_and_send_xid_pkt(struct llc_sap *sap, struct sk_buff *skb,
262 	ev->saddr.lsap = sap->laddr.lsap;
270 	llc_sap_state_process(sap, skb);
274  *	llc_sap_rcv - sends received pdus to the sap state machine
275  *	@sap: current sap component structure.
279  *	Sends received pdus to the sap state machine.
281 static void llc_sap_rcv(struct llc_sap *sap, struct sk_buff *skb,
292 	llc_sap_state_process(sap, skb);
295 static inline bool llc_dgram_match(const struct llc_sap *sap,
309  *	llc_lookup_dgram - Finds dgram socket for the local sap/mac
310  *	@sap: SAP
315  *	mac, and local sap. Returns pointer for socket found, %NULL otherwise.
317 static struct sock *llc_lookup_dgram(struct llc_sap *sap,
323 	int slot = llc_sk_laddr_hashfn(sap, laddr);
324 	struct hlist_nulls_head *laddr_hb = &sap->sk_laddr_hash[slot];
329 		if (llc_dgram_match(sap, laddr, rc, net)) {
333 			if (unlikely(llc_sk(rc)->sap != sap ||
334 				     !llc_dgram_match(sap, laddr, rc, net))) {
354 static inline bool llc_mcast_match(const struct llc_sap *sap,
366 static void llc_do_mcast(struct llc_sap *sap, struct sk_buff *skb,
379 		llc_sap_rcv(sap, skb1, stack[i]);
386  *	@sap: SAP
390  *	Search socket list of the SAP and finds connections with same sap.
393 static void llc_sap_mcast(struct llc_sap *sap,
401 	struct hlist_head *dev_hb = llc_sk_dev_hash(sap, skb->dev->ifindex);
403 	spin_lock_bh(&sap->sk_lock);
408 		if (!llc_mcast_match(sap, laddr, skb, sk))
415 			llc_do_mcast(sap, skb, stack, i);
419 	spin_unlock_bh(&sap->sk_lock);
421 	llc_do_mcast(sap, skb, stack, i);
425 void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb)
433 		llc_sap_mcast(sap, &laddr, skb);
436 		struct sock *sk = llc_lookup_dgram(sap, &laddr, dev_net(skb->dev));
438 			llc_sap_rcv(sap, skb, sk);