58 static void sctp_select_active_and_retran_path(struct sctp_association *asoc);
60 static void sctp_assoc_free_asconf_acks(struct sctp_association *asoc);
61 static void sctp_assoc_free_asconf_queue(struct sctp_association *asoc);
66 static struct sctp_association *sctp_association_init(struct sctp_association *asoc,  in sctp_association_init()  argument
82 	asoc->ep = (struct sctp_endpoint *)ep;  in sctp_association_init()
83 	asoc->base.sk = (struct sock *)sk;  in sctp_association_init()
85 	sctp_endpoint_hold(asoc->ep);  in sctp_association_init()
86 	sock_hold(asoc->base.sk);  in sctp_association_init()
89 	asoc->base.type = SCTP_EP_TYPE_ASSOCIATION;  in sctp_association_init()
92 	atomic_set(&asoc->base.refcnt, 1);  in sctp_association_init()
95 	sctp_bind_addr_init(&asoc->base.bind_addr, ep->base.bind_addr.port);  in sctp_association_init()
97 	asoc->state = SCTP_STATE_CLOSED;  in sctp_association_init()
98 	asoc->cookie_life = ms_to_ktime(sp->assocparams.sasoc_cookie_life);  in sctp_association_init()
99 	asoc->user_frag = sp->user_frag;  in sctp_association_init()
104 	asoc->max_retrans = sp->assocparams.sasoc_asocmaxrxt;  in sctp_association_init()
105 	asoc->pf_retrans  = net->sctp.pf_retrans;  in sctp_association_init()
107 	asoc->rto_initial = msecs_to_jiffies(sp->rtoinfo.srto_initial);  in sctp_association_init()
108 	asoc->rto_max = msecs_to_jiffies(sp->rtoinfo.srto_max);  in sctp_association_init()
109 	asoc->rto_min = msecs_to_jiffies(sp->rtoinfo.srto_min);  in sctp_association_init()
114 	asoc->hbinterval = msecs_to_jiffies(sp->hbinterval);  in sctp_association_init()
117 	asoc->pathmaxrxt = sp->pathmaxrxt;  in sctp_association_init()
120 	asoc->pathmtu = sp->pathmtu;  in sctp_association_init()
123 	asoc->sackdelay = msecs_to_jiffies(sp->sackdelay);  in sctp_association_init()
124 	asoc->sackfreq = sp->sackfreq;  in sctp_association_init()
129 	asoc->param_flags = sp->param_flags;  in sctp_association_init()
134 	asoc->max_burst = sp->max_burst;  in sctp_association_init()
137 	asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE] = asoc->rto_initial;  in sctp_association_init()
138 	asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT] = asoc->rto_initial;  in sctp_association_init()
139 	asoc->timeouts[SCTP_EVENT_TIMEOUT_T2_SHUTDOWN] = asoc->rto_initial;  in sctp_association_init()
145 	asoc->timeouts[SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD]  in sctp_association_init()
146 		= 5 * asoc->rto_max;  in sctp_association_init()
148 	asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] = asoc->sackdelay;  in sctp_association_init()
149 	asoc->timeouts[SCTP_EVENT_TIMEOUT_AUTOCLOSE] = sp->autoclose * HZ;  in sctp_association_init()
153 		setup_timer(&asoc->timers[i], sctp_timer_events[i],  in sctp_association_init()
154 				(unsigned long)asoc);  in sctp_association_init()
160 	asoc->c.sinit_max_instreams = sp->initmsg.sinit_max_instreams;  in sctp_association_init()
161 	asoc->c.sinit_num_ostreams  = sp->initmsg.sinit_num_ostreams;  in sctp_association_init()
162 	asoc->max_init_attempts	= sp->initmsg.sinit_max_attempts;  in sctp_association_init()
164 	asoc->max_init_timeo =  in sctp_association_init()
173 		asoc->rwnd = SCTP_DEFAULT_MINWINDOW;  in sctp_association_init()
175 		asoc->rwnd = sk->sk_rcvbuf/2;  in sctp_association_init()
177 	asoc->a_rwnd = asoc->rwnd;  in sctp_association_init()
180 	asoc->peer.rwnd = SCTP_DEFAULT_MAXWINDOW;  in sctp_association_init()
183 	atomic_set(&asoc->rmem_alloc, 0);  in sctp_association_init()
185 	init_waitqueue_head(&asoc->wait);  in sctp_association_init()
187 	asoc->c.my_vtag = sctp_generate_tag(ep);  in sctp_association_init()
188 	asoc->c.my_port = ep->base.bind_addr.port;  in sctp_association_init()
190 	asoc->c.initial_tsn = sctp_generate_tsn(ep);  in sctp_association_init()
192 	asoc->next_tsn = asoc->c.initial_tsn;  in sctp_association_init()
194 	asoc->ctsn_ack_point = asoc->next_tsn - 1;  in sctp_association_init()
195 	asoc->adv_peer_ack_point = asoc->ctsn_ack_point;  in sctp_association_init()
196 	asoc->highest_sacked = asoc->ctsn_ack_point;  in sctp_association_init()
197 	asoc->last_cwr_tsn = asoc->ctsn_ack_point;  in sctp_association_init()
209 	asoc->addip_serial = asoc->c.initial_tsn;  in sctp_association_init()
211 	INIT_LIST_HEAD(&asoc->addip_chunk_list);  in sctp_association_init()
212 	INIT_LIST_HEAD(&asoc->asconf_ack_list);  in sctp_association_init()
215 	INIT_LIST_HEAD(&asoc->peer.transport_addr_list);  in sctp_association_init()
228 	asoc->peer.sack_needed = 1;  in sctp_association_init()
229 	asoc->peer.sack_generation = 1;  in sctp_association_init()
237 		asoc->peer.asconf_capable = 1;  in sctp_association_init()
240 	sctp_inq_init(&asoc->base.inqueue);  in sctp_association_init()
241 	sctp_inq_set_th_handler(&asoc->base.inqueue, sctp_assoc_bh_rcv);  in sctp_association_init()
244 	sctp_outq_init(asoc, &asoc->outqueue);  in sctp_association_init()
246 	if (!sctp_ulpq_init(&asoc->ulpq, asoc))  in sctp_association_init()
252 	asoc->peer.ipv4_address = 1;  in sctp_association_init()
253 	if (asoc->base.sk->sk_family == PF_INET6)  in sctp_association_init()
254 		asoc->peer.ipv6_address = 1;  in sctp_association_init()
255 	INIT_LIST_HEAD(&asoc->asocs);  in sctp_association_init()
257 	asoc->default_stream = sp->default_stream;  in sctp_association_init()
258 	asoc->default_ppid = sp->default_ppid;  in sctp_association_init()
259 	asoc->default_flags = sp->default_flags;  in sctp_association_init()
260 	asoc->default_context = sp->default_context;  in sctp_association_init()
261 	asoc->default_timetolive = sp->default_timetolive;  in sctp_association_init()
262 	asoc->default_rcv_context = sp->default_rcv_context;  in sctp_association_init()
265 	INIT_LIST_HEAD(&asoc->endpoint_shared_keys);  in sctp_association_init()
266 	err = sctp_auth_asoc_copy_shkeys(ep, asoc, gfp);  in sctp_association_init()
270 	asoc->active_key_id = ep->active_key_id;  in sctp_association_init()
274 		memcpy(asoc->c.auth_hmacs, ep->auth_hmacs_list,  in sctp_association_init()
277 		memcpy(asoc->c.auth_chunks, ep->auth_chunk_list,  in sctp_association_init()
281 	p = (sctp_paramhdr_t *)asoc->c.auth_random;  in sctp_association_init()
286 	return asoc;  in sctp_association_init()
289 	sock_put(asoc->base.sk);  in sctp_association_init()
290 	sctp_endpoint_put(asoc->ep);  in sctp_association_init()
300 	struct sctp_association *asoc;  in sctp_association_new()  local
302 	asoc = kzalloc(sizeof(*asoc), gfp);  in sctp_association_new()
303 	if (!asoc)  in sctp_association_new()
306 	if (!sctp_association_init(asoc, ep, sk, scope, gfp))  in sctp_association_new()
311 	pr_debug("Created asoc %p\n", asoc);  in sctp_association_new()
313 	return asoc;  in sctp_association_new()
316 	kfree(asoc);  in sctp_association_new()
324 void sctp_association_free(struct sctp_association *asoc)  in sctp_association_free()  argument
326 	struct sock *sk = asoc->base.sk;  in sctp_association_free()
334 	if (!list_empty(&asoc->asocs)) {  in sctp_association_free()
335 		list_del(&asoc->asocs);  in sctp_association_free()
347 	asoc->base.dead = true;  in sctp_association_free()
350 	sctp_outq_free(&asoc->outqueue);  in sctp_association_free()
353 	sctp_ulpq_free(&asoc->ulpq);  in sctp_association_free()
356 	sctp_inq_free(&asoc->base.inqueue);  in sctp_association_free()
358 	sctp_tsnmap_free(&asoc->peer.tsn_map);  in sctp_association_free()
361 	sctp_ssnmap_free(asoc->ssnmap);  in sctp_association_free()
364 	sctp_bind_addr_free(&asoc->base.bind_addr);  in sctp_association_free()
372 		if (del_timer(&asoc->timers[i]))  in sctp_association_free()
373 			sctp_association_put(asoc);  in sctp_association_free()
377 	kfree(asoc->peer.cookie);  in sctp_association_free()
378 	kfree(asoc->peer.peer_random);  in sctp_association_free()
379 	kfree(asoc->peer.peer_chunks);  in sctp_association_free()
380 	kfree(asoc->peer.peer_hmacs);  in sctp_association_free()
383 	list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {  in sctp_association_free()
389 	asoc->peer.transport_count = 0;  in sctp_association_free()
391 	sctp_asconf_queue_teardown(asoc);  in sctp_association_free()
394 	kfree(asoc->asconf_addr_del_pending);  in sctp_association_free()
397 	sctp_auth_destroy_keys(&asoc->endpoint_shared_keys);  in sctp_association_free()
400 	sctp_auth_key_put(asoc->asoc_shared_key);  in sctp_association_free()
402 	sctp_association_put(asoc);  in sctp_association_free()
406 static void sctp_association_destroy(struct sctp_association *asoc)  in sctp_association_destroy()  argument
408 	if (unlikely(!asoc->base.dead)) {  in sctp_association_destroy()
409 		WARN(1, "Attempt to destroy undead association %p!\n", asoc);  in sctp_association_destroy()
413 	sctp_endpoint_put(asoc->ep);  in sctp_association_destroy()
414 	sock_put(asoc->base.sk);  in sctp_association_destroy()
416 	if (asoc->assoc_id != 0) {  in sctp_association_destroy()
418 		idr_remove(&sctp_assocs_id, asoc->assoc_id);  in sctp_association_destroy()
422 	WARN_ON(atomic_read(&asoc->rmem_alloc));  in sctp_association_destroy()
424 	kfree(asoc);  in sctp_association_destroy()
429 void sctp_assoc_set_primary(struct sctp_association *asoc,  in sctp_assoc_set_primary()  argument
437 	if (asoc->peer.primary_path != NULL &&  in sctp_assoc_set_primary()
438 	    asoc->peer.primary_path != transport)  in sctp_assoc_set_primary()
441 	asoc->peer.primary_path = transport;  in sctp_assoc_set_primary()
444 	memcpy(&asoc->peer.primary_addr, &transport->ipaddr,  in sctp_assoc_set_primary()
452 		asoc->peer.active_path = transport;  in sctp_assoc_set_primary()
468 	if (!asoc->outqueue.outstanding_bytes && !asoc->outqueue.out_qlen)  in sctp_assoc_set_primary()
482 	transport->cacc.next_tsn_at_change = asoc->next_tsn;  in sctp_assoc_set_primary()
486 void sctp_assoc_rm_peer(struct sctp_association *asoc,  in sctp_assoc_rm_peer()  argument
493 		 __func__, asoc, &peer->ipaddr.sa);  in sctp_assoc_rm_peer()
498 	if (asoc->peer.retran_path == peer)  in sctp_assoc_rm_peer()
499 		sctp_assoc_update_retran_path(asoc);  in sctp_assoc_rm_peer()
505 	pos = asoc->peer.transport_addr_list.next;  in sctp_assoc_rm_peer()
509 	if (asoc->peer.primary_path == peer)  in sctp_assoc_rm_peer()
510 		sctp_assoc_set_primary(asoc, transport);  in sctp_assoc_rm_peer()
511 	if (asoc->peer.active_path == peer)  in sctp_assoc_rm_peer()
512 		asoc->peer.active_path = transport;  in sctp_assoc_rm_peer()
513 	if (asoc->peer.retran_path == peer)  in sctp_assoc_rm_peer()
514 		asoc->peer.retran_path = transport;  in sctp_assoc_rm_peer()
515 	if (asoc->peer.last_data_from == peer)  in sctp_assoc_rm_peer()
516 		asoc->peer.last_data_from = transport;  in sctp_assoc_rm_peer()
523 	if (asoc->init_last_sent_to == peer)  in sctp_assoc_rm_peer()
524 		asoc->init_last_sent_to = NULL;  in sctp_assoc_rm_peer()
531 	if (asoc->shutdown_last_sent_to == peer)  in sctp_assoc_rm_peer()
532 		asoc->shutdown_last_sent_to = NULL;  in sctp_assoc_rm_peer()
537 	if (asoc->addip_last_asconf &&  in sctp_assoc_rm_peer()
538 	    asoc->addip_last_asconf->transport == peer)  in sctp_assoc_rm_peer()
539 		asoc->addip_last_asconf->transport = NULL;  in sctp_assoc_rm_peer()
545 		struct sctp_transport *active = asoc->peer.active_path;  in sctp_assoc_rm_peer()
568 	asoc->peer.transport_count--;  in sctp_assoc_rm_peer()
574 struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,  in sctp_assoc_add_peer()  argument
579 	struct net *net = sock_net(asoc->base.sk);  in sctp_assoc_add_peer()
584 	sp = sctp_sk(asoc->base.sk);  in sctp_assoc_add_peer()
590 		 asoc, &addr->sa, peer_state);  in sctp_assoc_add_peer()
593 	if (0 == asoc->peer.port)  in sctp_assoc_add_peer()
594 		asoc->peer.port = port;  in sctp_assoc_add_peer()
597 	peer = sctp_assoc_lookup_paddr(asoc, addr);  in sctp_assoc_add_peer()
613 	sctp_transport_set_owner(peer, asoc);  in sctp_assoc_add_peer()
618 	peer->hbinterval = asoc->hbinterval;  in sctp_assoc_add_peer()
621 	peer->pathmaxrxt = asoc->pathmaxrxt;  in sctp_assoc_add_peer()
624 	peer->pf_retrans = asoc->pf_retrans;  in sctp_assoc_add_peer()
629 	peer->sackdelay = asoc->sackdelay;  in sctp_assoc_add_peer()
630 	peer->sackfreq = asoc->sackfreq;  in sctp_assoc_add_peer()
635 	peer->param_flags = asoc->param_flags;  in sctp_assoc_add_peer()
641 		if (asoc->pathmtu)  in sctp_assoc_add_peer()
642 			peer->pathmtu = asoc->pathmtu;  in sctp_assoc_add_peer()
652 	if (asoc->pathmtu)  in sctp_assoc_add_peer()
653 		asoc->pathmtu = min_t(int, peer->pathmtu, asoc->pathmtu);  in sctp_assoc_add_peer()
655 		asoc->pathmtu = peer->pathmtu;  in sctp_assoc_add_peer()
657 	pr_debug("%s: association:%p PMTU set to %d\n", __func__, asoc,  in sctp_assoc_add_peer()
658 		 asoc->pathmtu);  in sctp_assoc_add_peer()
662 	asoc->frag_point = sctp_frag_point(asoc, asoc->pathmtu);  in sctp_assoc_add_peer()
667 	sctp_packet_init(&peer->packet, peer, asoc->base.bind_addr.port,  in sctp_assoc_add_peer()
668 			 asoc->peer.port);  in sctp_assoc_add_peer()
680 	peer->cwnd = min(4*asoc->pathmtu, max_t(__u32, 2*asoc->pathmtu, 4380));  in sctp_assoc_add_peer()
693 	peer->rto = asoc->rto_initial;  in sctp_assoc_add_peer()
694 	sctp_max_rto(asoc, peer);  in sctp_assoc_add_peer()
700 	list_add_tail_rcu(&peer->transports, &asoc->peer.transport_addr_list);  in sctp_assoc_add_peer()
701 	asoc->peer.transport_count++;  in sctp_assoc_add_peer()
704 	if (!asoc->peer.primary_path) {  in sctp_assoc_add_peer()
705 		sctp_assoc_set_primary(asoc, peer);  in sctp_assoc_add_peer()
706 		asoc->peer.retran_path = peer;  in sctp_assoc_add_peer()
709 	if (asoc->peer.active_path == asoc->peer.retran_path &&  in sctp_assoc_add_peer()
711 		asoc->peer.retran_path = peer;  in sctp_assoc_add_peer()
718 void sctp_assoc_del_peer(struct sctp_association *asoc,  in sctp_assoc_del_peer()  argument
725 	list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {  in sctp_assoc_del_peer()
729 			sctp_assoc_rm_peer(asoc, transport);  in sctp_assoc_del_peer()
737 					const struct sctp_association *asoc,  in sctp_assoc_lookup_paddr()  argument
744 	list_for_each_entry(t, &asoc->peer.transport_addr_list,  in sctp_assoc_lookup_paddr()
754 void sctp_assoc_del_nonprimary_peers(struct sctp_association *asoc,  in sctp_assoc_del_nonprimary_peers()  argument
760 	list_for_each_entry_safe(t, temp, &asoc->peer.transport_addr_list,  in sctp_assoc_del_nonprimary_peers()
764 			sctp_assoc_rm_peer(asoc, t);  in sctp_assoc_del_nonprimary_peers()
772 void sctp_assoc_control_transport(struct sctp_association *asoc,  in sctp_assoc_control_transport()  argument
800 			transport->cwnd = asoc->pathmtu;  in sctp_assoc_control_transport()
838 		event = sctp_ulpevent_make_peer_addr_change(asoc, &addr,  in sctp_assoc_control_transport()
841 			sctp_ulpq_tail_event(&asoc->ulpq, event);  in sctp_assoc_control_transport()
845 	sctp_select_active_and_retran_path(asoc);  in sctp_assoc_control_transport()
849 void sctp_association_hold(struct sctp_association *asoc)  in sctp_association_hold()  argument
851 	atomic_inc(&asoc->base.refcnt);  in sctp_association_hold()
857 void sctp_association_put(struct sctp_association *asoc)  in sctp_association_put()  argument
859 	if (atomic_dec_and_test(&asoc->base.refcnt))  in sctp_association_put()
860 		sctp_association_destroy(asoc);  in sctp_association_put()
866 __u32 sctp_association_get_next_tsn(struct sctp_association *asoc)  in sctp_association_get_next_tsn()  argument
873 	__u32 retval = asoc->next_tsn;  in sctp_association_get_next_tsn()
874 	asoc->next_tsn++;  in sctp_association_get_next_tsn()
875 	asoc->unack_data++;  in sctp_association_get_next_tsn()
899 struct sctp_chunk *sctp_get_ecne_prepend(struct sctp_association *asoc)  in sctp_get_ecne_prepend()  argument
901 	if (!asoc->need_ecne)  in sctp_get_ecne_prepend()
907 	return sctp_make_ecne(asoc, asoc->last_ecne_tsn);  in sctp_get_ecne_prepend()
913 struct sctp_transport *sctp_assoc_lookup_tsn(struct sctp_association *asoc,  in sctp_assoc_lookup_tsn()  argument
939 	active = asoc->peer.active_path;  in sctp_assoc_lookup_tsn()
951 	list_for_each_entry(transport, &asoc->peer.transport_addr_list,  in sctp_assoc_lookup_tsn()
969 struct sctp_transport *sctp_assoc_is_match(struct sctp_association *asoc,  in sctp_assoc_is_match()  argument
976 	if ((htons(asoc->base.bind_addr.port) == laddr->v4.sin_port) &&  in sctp_assoc_is_match()
977 	    (htons(asoc->peer.port) == paddr->v4.sin_port) &&  in sctp_assoc_is_match()
978 	    net_eq(sock_net(asoc->base.sk), net)) {  in sctp_assoc_is_match()
979 		transport = sctp_assoc_lookup_paddr(asoc, paddr);  in sctp_assoc_is_match()
983 		if (sctp_bind_addr_match(&asoc->base.bind_addr, laddr,  in sctp_assoc_is_match()
984 					 sctp_sk(asoc->base.sk)))  in sctp_assoc_is_match()
996 	struct sctp_association *asoc =  in sctp_assoc_bh_rcv()  local
999 	struct net *net = sock_net(asoc->base.sk);  in sctp_assoc_bh_rcv()
1008 	ep = asoc->ep;  in sctp_assoc_bh_rcv()
1010 	inqueue = &asoc->base.inqueue;  in sctp_assoc_bh_rcv()
1011 	sctp_association_hold(asoc);  in sctp_assoc_bh_rcv()
1013 		state = asoc->state;  in sctp_assoc_bh_rcv()
1023 		if (sctp_auth_recv_cid(subtype.chunk, asoc) && !chunk->auth)  in sctp_assoc_bh_rcv()
1030 			asoc->peer.last_data_from = chunk->transport;  in sctp_assoc_bh_rcv()
1033 			asoc->stats.ictrlchunks++;  in sctp_assoc_bh_rcv()
1035 				asoc->stats.isacks++;  in sctp_assoc_bh_rcv()
1043 				   state, ep, asoc, chunk, GFP_ATOMIC);  in sctp_assoc_bh_rcv()
1048 		if (asoc->base.dead)  in sctp_assoc_bh_rcv()
1055 	sctp_association_put(asoc);  in sctp_assoc_bh_rcv()
1090 void sctp_assoc_update(struct sctp_association *asoc,  in sctp_assoc_update()  argument
1097 	asoc->c = new->c;  in sctp_assoc_update()
1098 	asoc->peer.rwnd = new->peer.rwnd;  in sctp_assoc_update()
1099 	asoc->peer.sack_needed = new->peer.sack_needed;  in sctp_assoc_update()
1100 	asoc->peer.auth_capable = new->peer.auth_capable;  in sctp_assoc_update()
1101 	asoc->peer.i = new->peer.i;  in sctp_assoc_update()
1102 	sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL,  in sctp_assoc_update()
1103 			 asoc->peer.i.initial_tsn, GFP_ATOMIC);  in sctp_assoc_update()
1106 	list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {  in sctp_assoc_update()
1109 			sctp_assoc_rm_peer(asoc, trans);  in sctp_assoc_update()
1113 		if (asoc->state >= SCTP_STATE_ESTABLISHED)  in sctp_assoc_update()
1122 	if (asoc->state >= SCTP_STATE_ESTABLISHED) {  in sctp_assoc_update()
1123 		asoc->next_tsn = new->next_tsn;  in sctp_assoc_update()
1124 		asoc->ctsn_ack_point = new->ctsn_ack_point;  in sctp_assoc_update()
1125 		asoc->adv_peer_ack_point = new->adv_peer_ack_point;  in sctp_assoc_update()
1130 		sctp_ssnmap_clear(asoc->ssnmap);  in sctp_assoc_update()
1136 		sctp_ulpq_flush(&asoc->ulpq);  in sctp_assoc_update()
1142 		asoc->overall_error_count = 0;  in sctp_assoc_update()
1148 			if (!sctp_assoc_lookup_paddr(asoc, &trans->ipaddr))  in sctp_assoc_update()
1149 				sctp_assoc_add_peer(asoc, &trans->ipaddr,  in sctp_assoc_update()
1153 		asoc->ctsn_ack_point = asoc->next_tsn - 1;  in sctp_assoc_update()
1154 		asoc->adv_peer_ack_point = asoc->ctsn_ack_point;  in sctp_assoc_update()
1155 		if (!asoc->ssnmap) {  in sctp_assoc_update()
1157 			asoc->ssnmap = new->ssnmap;  in sctp_assoc_update()
1161 		if (!asoc->assoc_id) {  in sctp_assoc_update()
1165 			sctp_assoc_set_id(asoc, GFP_ATOMIC);  in sctp_assoc_update()
1172 	kfree(asoc->peer.peer_random);  in sctp_assoc_update()
1173 	asoc->peer.peer_random = new->peer.peer_random;  in sctp_assoc_update()
1176 	kfree(asoc->peer.peer_chunks);  in sctp_assoc_update()
1177 	asoc->peer.peer_chunks = new->peer.peer_chunks;  in sctp_assoc_update()
1180 	kfree(asoc->peer.peer_hmacs);  in sctp_assoc_update()
1181 	asoc->peer.peer_hmacs = new->peer.peer_hmacs;  in sctp_assoc_update()
1184 	sctp_auth_asoc_init_active_key(asoc, GFP_ATOMIC);  in sctp_assoc_update()
1266 void sctp_assoc_update_retran_path(struct sctp_association *asoc)  in sctp_assoc_update_retran_path()  argument
1268 	struct sctp_transport *trans = asoc->peer.retran_path;  in sctp_assoc_update_retran_path()
1272 	if (asoc->peer.transport_count == 1)  in sctp_assoc_update_retran_path()
1277 	if (asoc->peer.active_path == asoc->peer.retran_path &&  in sctp_assoc_update_retran_path()
1278 	    asoc->peer.active_path->state == SCTP_ACTIVE)  in sctp_assoc_update_retran_path()
1285 		if (&trans->transports == &asoc->peer.transport_addr_list)  in sctp_assoc_update_retran_path()
1294 		if (trans == asoc->peer.retran_path)  in sctp_assoc_update_retran_path()
1298 	asoc->peer.retran_path = trans_next;  in sctp_assoc_update_retran_path()
1301 		 __func__, asoc, &asoc->peer.retran_path->ipaddr.sa);  in sctp_assoc_update_retran_path()
1304 static void sctp_select_active_and_retran_path(struct sctp_association *asoc)  in sctp_select_active_and_retran_path()  argument
1310 	list_for_each_entry(trans, &asoc->peer.transport_addr_list,  in sctp_select_active_and_retran_path()
1344 	if ((asoc->peer.primary_path->state == SCTP_ACTIVE ||  in sctp_select_active_and_retran_path()
1345 	     asoc->peer.primary_path->state == SCTP_UNKNOWN) &&  in sctp_select_active_and_retran_path()
1346 	     asoc->peer.primary_path != trans_pri) {  in sctp_select_active_and_retran_path()
1348 		trans_pri = asoc->peer.primary_path;  in sctp_select_active_and_retran_path()
1362 		trans_pri = sctp_trans_elect_best(asoc->peer.active_path, trans_pf);  in sctp_select_active_and_retran_path()
1367 	asoc->peer.active_path = trans_pri;  in sctp_select_active_and_retran_path()
1368 	asoc->peer.retran_path = trans_sec;  in sctp_select_active_and_retran_path()
1372 sctp_assoc_choose_alter_transport(struct sctp_association *asoc,  in sctp_assoc_choose_alter_transport()  argument
1380 		return asoc->peer.active_path;  in sctp_assoc_choose_alter_transport()
1382 		if (last_sent_to == asoc->peer.retran_path)  in sctp_assoc_choose_alter_transport()
1383 			sctp_assoc_update_retran_path(asoc);  in sctp_assoc_choose_alter_transport()
1385 		return asoc->peer.retran_path;  in sctp_assoc_choose_alter_transport()
1392 void sctp_assoc_sync_pmtu(struct sock *sk, struct sctp_association *asoc)  in sctp_assoc_sync_pmtu()  argument
1397 	if (!asoc)  in sctp_assoc_sync_pmtu()
1401 	list_for_each_entry(t, &asoc->peer.transport_addr_list,  in sctp_assoc_sync_pmtu()
1412 		asoc->pathmtu = pmtu;  in sctp_assoc_sync_pmtu()
1413 		asoc->frag_point = sctp_frag_point(asoc, pmtu);  in sctp_assoc_sync_pmtu()
1416 	pr_debug("%s: asoc:%p, pmtu:%d, frag_point:%d\n", __func__, asoc,  in sctp_assoc_sync_pmtu()
1417 		 asoc->pathmtu, asoc->frag_point);  in sctp_assoc_sync_pmtu()
1421 static inline bool sctp_peer_needs_update(struct sctp_association *asoc)  in sctp_peer_needs_update()  argument
1423 	struct net *net = sock_net(asoc->base.sk);  in sctp_peer_needs_update()
1424 	switch (asoc->state) {  in sctp_peer_needs_update()
1429 		if ((asoc->rwnd > asoc->a_rwnd) &&  in sctp_peer_needs_update()
1430 		    ((asoc->rwnd - asoc->a_rwnd) >= max_t(__u32,  in sctp_peer_needs_update()
1431 			   (asoc->base.sk->sk_rcvbuf >> net->sctp.rwnd_upd_shift),  in sctp_peer_needs_update()
1432 			   asoc->pathmtu)))  in sctp_peer_needs_update()
1442 void sctp_assoc_rwnd_increase(struct sctp_association *asoc, unsigned int len)  in sctp_assoc_rwnd_increase()  argument
1447 	if (asoc->rwnd_over) {  in sctp_assoc_rwnd_increase()
1448 		if (asoc->rwnd_over >= len) {  in sctp_assoc_rwnd_increase()
1449 			asoc->rwnd_over -= len;  in sctp_assoc_rwnd_increase()
1451 			asoc->rwnd += (len - asoc->rwnd_over);  in sctp_assoc_rwnd_increase()
1452 			asoc->rwnd_over = 0;  in sctp_assoc_rwnd_increase()
1455 		asoc->rwnd += len;  in sctp_assoc_rwnd_increase()
1463 	if (asoc->rwnd_press && asoc->rwnd >= asoc->rwnd_press) {  in sctp_assoc_rwnd_increase()
1464 		int change = min(asoc->pathmtu, asoc->rwnd_press);  in sctp_assoc_rwnd_increase()
1465 		asoc->rwnd += change;  in sctp_assoc_rwnd_increase()
1466 		asoc->rwnd_press -= change;  in sctp_assoc_rwnd_increase()
1470 		 __func__, asoc, len, asoc->rwnd, asoc->rwnd_over,  in sctp_assoc_rwnd_increase()
1471 		 asoc->a_rwnd);  in sctp_assoc_rwnd_increase()
1478 	if (sctp_peer_needs_update(asoc)) {  in sctp_assoc_rwnd_increase()
1479 		asoc->a_rwnd = asoc->rwnd;  in sctp_assoc_rwnd_increase()
1482 			 "a_rwnd:%u\n", __func__, asoc, asoc->rwnd,  in sctp_assoc_rwnd_increase()
1483 			 asoc->a_rwnd);  in sctp_assoc_rwnd_increase()
1485 		sack = sctp_make_sack(asoc);  in sctp_assoc_rwnd_increase()
1489 		asoc->peer.sack_needed = 0;  in sctp_assoc_rwnd_increase()
1491 		sctp_outq_tail(&asoc->outqueue, sack);  in sctp_assoc_rwnd_increase()
1494 		timer = &asoc->timers[SCTP_EVENT_TIMEOUT_SACK];  in sctp_assoc_rwnd_increase()
1496 			sctp_association_put(asoc);  in sctp_assoc_rwnd_increase()
1501 void sctp_assoc_rwnd_decrease(struct sctp_association *asoc, unsigned int len)  in sctp_assoc_rwnd_decrease()  argument
1506 	if (unlikely(!asoc->rwnd || asoc->rwnd_over))  in sctp_assoc_rwnd_decrease()
1508 			 "asoc->rwnd_over:%u!\n", __func__, asoc,  in sctp_assoc_rwnd_decrease()
1509 			 asoc->rwnd, asoc->rwnd_over);  in sctp_assoc_rwnd_decrease()
1511 	if (asoc->ep->rcvbuf_policy)  in sctp_assoc_rwnd_decrease()
1512 		rx_count = atomic_read(&asoc->rmem_alloc);  in sctp_assoc_rwnd_decrease()
1514 		rx_count = atomic_read(&asoc->base.sk->sk_rmem_alloc);  in sctp_assoc_rwnd_decrease()
1521 	if (rx_count >= asoc->base.sk->sk_rcvbuf)  in sctp_assoc_rwnd_decrease()
1524 	if (asoc->rwnd >= len) {  in sctp_assoc_rwnd_decrease()
1525 		asoc->rwnd -= len;  in sctp_assoc_rwnd_decrease()
1527 			asoc->rwnd_press += asoc->rwnd;  in sctp_assoc_rwnd_decrease()
1528 			asoc->rwnd = 0;  in sctp_assoc_rwnd_decrease()
1531 		asoc->rwnd_over = len - asoc->rwnd;  in sctp_assoc_rwnd_decrease()
1532 		asoc->rwnd = 0;  in sctp_assoc_rwnd_decrease()
1536 		 __func__, asoc, len, asoc->rwnd, asoc->rwnd_over,  in sctp_assoc_rwnd_decrease()
1537 		 asoc->rwnd_press);  in sctp_assoc_rwnd_decrease()
1543 int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *asoc,  in sctp_assoc_set_bind_addr_from_ep()  argument
1551 	flags = (PF_INET6 == asoc->base.sk->sk_family) ? SCTP_ADDR6_ALLOWED : 0;  in sctp_assoc_set_bind_addr_from_ep()
1552 	if (asoc->peer.ipv4_address)  in sctp_assoc_set_bind_addr_from_ep()
1554 	if (asoc->peer.ipv6_address)  in sctp_assoc_set_bind_addr_from_ep()
1557 	return sctp_bind_addr_copy(sock_net(asoc->base.sk),  in sctp_assoc_set_bind_addr_from_ep()
1558 				   &asoc->base.bind_addr,  in sctp_assoc_set_bind_addr_from_ep()
1559 				   &asoc->ep->base.bind_addr,  in sctp_assoc_set_bind_addr_from_ep()
1564 int sctp_assoc_set_bind_addr_from_cookie(struct sctp_association *asoc,  in sctp_assoc_set_bind_addr_from_cookie()  argument
1572 	return sctp_raw_to_bind_addrs(&asoc->base.bind_addr, raw, var_size3,  in sctp_assoc_set_bind_addr_from_cookie()
1573 				      asoc->ep->base.bind_addr.port, gfp);  in sctp_assoc_set_bind_addr_from_cookie()
1577 int sctp_assoc_lookup_laddr(struct sctp_association *asoc,  in sctp_assoc_lookup_laddr()  argument
1582 	if ((asoc->base.bind_addr.port == ntohs(laddr->v4.sin_port)) &&  in sctp_assoc_lookup_laddr()
1583 	    sctp_bind_addr_match(&asoc->base.bind_addr, laddr,  in sctp_assoc_lookup_laddr()
1584 				 sctp_sk(asoc->base.sk)))  in sctp_assoc_lookup_laddr()
1591 int sctp_assoc_set_id(struct sctp_association *asoc, gfp_t gfp)  in sctp_assoc_set_id()  argument
1597 	if (asoc->assoc_id)  in sctp_assoc_set_id()
1604 	ret = idr_alloc_cyclic(&sctp_assocs_id, asoc, 1, 0, GFP_NOWAIT);  in sctp_assoc_set_id()
1611 	asoc->assoc_id = (sctp_assoc_t)ret;  in sctp_assoc_set_id()
1616 static void sctp_assoc_free_asconf_queue(struct sctp_association *asoc)  in sctp_assoc_free_asconf_queue()  argument
1621 	list_for_each_entry_safe(asconf, tmp, &asoc->addip_chunk_list, list) {  in sctp_assoc_free_asconf_queue()
1628 static void sctp_assoc_free_asconf_acks(struct sctp_association *asoc)  in sctp_assoc_free_asconf_acks()  argument
1633 	list_for_each_entry_safe(ack, tmp, &asoc->asconf_ack_list,  in sctp_assoc_free_asconf_acks()
1641 void sctp_assoc_clean_asconf_ack_cache(const struct sctp_association *asoc)  in sctp_assoc_clean_asconf_ack_cache()  argument
1649 	list_for_each_entry_safe(ack, tmp, &asoc->asconf_ack_list,  in sctp_assoc_clean_asconf_ack_cache()
1652 				htonl(asoc->peer.addip_serial))  in sctp_assoc_clean_asconf_ack_cache()
1662 					const struct sctp_association *asoc,  in sctp_assoc_lookup_asconf_ack()  argument
1670 	list_for_each_entry(ack, &asoc->asconf_ack_list, transmitted_list) {  in sctp_assoc_lookup_asconf_ack()
1682 void sctp_asconf_queue_teardown(struct sctp_association *asoc)  in sctp_asconf_queue_teardown()  argument
1685 	sctp_assoc_free_asconf_acks(asoc);  in sctp_asconf_queue_teardown()
1688 	sctp_assoc_free_asconf_queue(asoc);  in sctp_asconf_queue_teardown()
1691 	if (asoc->addip_last_asconf)  in sctp_asconf_queue_teardown()
1692 		sctp_chunk_free(asoc->addip_last_asconf);  in sctp_asconf_queue_teardown()