2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #ifndef _NETINET_SCTP_PCB_H_
37 #define _NETINET_SCTP_PCB_H_
39 #include <netinet/sctp_os.h>
40 #include <netinet/sctp.h>
41 #include <netinet/sctp_constants.h>
42 #include <netinet/sctp_sysctl.h>
44 LIST_HEAD(sctppcbhead, sctp_inpcb);
45 LIST_HEAD(sctpasochead, sctp_tcb);
46 LIST_HEAD(sctpladdr, sctp_laddr);
47 LIST_HEAD(sctpvtaghead, sctp_tagblock);
48 LIST_HEAD(sctp_vrflist, sctp_vrf);
49 LIST_HEAD(sctp_ifnlist, sctp_ifn);
50 LIST_HEAD(sctp_ifalist, sctp_ifa);
51 TAILQ_HEAD(sctp_readhead, sctp_queued_to_read);
52 TAILQ_HEAD(sctp_streamhead, sctp_stream_queue_pending);
54 #include <netinet/sctp_structs.h>
55 #include <netinet/sctp_auth.h>
57 #define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask)
58 #define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask)
61 LIST_ENTRY(sctp_vrf) next_vrf;
62 struct sctp_ifalist *vrf_addr_hash;
63 struct sctp_ifnlist ifnlist;
65 uint32_t tbl_id_v4; /* default v4 table id */
66 uint32_t tbl_id_v6; /* default v6 table id */
67 uint32_t total_ifa_count;
68 u_long vrf_addr_hashmark;
73 struct sctp_ifalist ifalist;
75 LIST_ENTRY(sctp_ifn) next_ifn;
76 LIST_ENTRY(sctp_ifn) next_bucket;
77 void *ifn_p; /* never access without appropriate lock */
80 uint32_t ifn_index; /* shorthand way to look at ifn for reference */
81 uint32_t refcount; /* number of reference held should be >=
83 uint32_t ifa_count; /* IFA's we hold (in our list - ifalist) */
84 uint32_t num_v6; /* number of v6 addresses */
85 uint32_t num_v4; /* number of v4 addresses */
86 uint32_t registered_af; /* registered address family for i/f events */
87 char ifn_name[SCTP_IFNAMSIZ];
90 /* SCTP local IFA flags */
91 #define SCTP_ADDR_VALID 0x00000001 /* its up and active */
92 #define SCTP_BEING_DELETED 0x00000002 /* being deleted, when
93 * refcount = 0. Note that it
94 * is pulled from the ifn list
95 * and ifa_p is nulled right
96 * away but it cannot be freed
98 * pointing to it is deleted. */
99 #define SCTP_ADDR_DEFER_USE 0x00000004 /* Hold off using this one */
100 #define SCTP_ADDR_IFA_UNUSEABLE 0x00000008
103 LIST_ENTRY(sctp_ifa) next_ifa;
104 LIST_ENTRY(sctp_ifa) next_bucket;
105 struct sctp_ifn *ifn_p; /* back pointer to parent ifn */
106 void *ifa; /* pointer to ifa, needed for flag update for
107 * that we MUST lock appropriate locks. This
109 union sctp_sockstore address;
110 uint32_t refcount; /* number of folks refering to this */
112 uint32_t localifa_flags;
113 uint32_t vrf_id; /* vrf_id of this addr (for deleting) */
121 LIST_ENTRY(sctp_laddr) sctp_nxt_addr; /* next in list */
122 struct sctp_ifa *ifa;
123 uint32_t action; /* Used during asconf and adding if no-zero
124 * src-addr selection will not consider this
126 struct timeval start_time; /* time when this address was created */
129 struct sctp_block_entry {
133 struct sctp_timewait {
134 uint32_t tv_sec_at_expire; /* the seconds from boot to expire */
135 uint32_t v_tag; /* the vtag that can not be reused */
136 uint16_t lport; /* the local port used in vtag */
137 uint16_t rport; /* the remote port used in vtag */
140 struct sctp_tagblock {
141 LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock;
142 struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK];
148 struct socket *udp4_tun_socket;
151 struct socket *udp6_tun_socket;
153 struct sctpasochead *sctp_asochash;
156 struct sctppcbhead *sctp_ephash;
160 * The TCP model represents a substantial overhead in that we get an
161 * additional hash table to keep explicit connections in. The
162 * listening TCP endpoint will exist in the usual ephash above and
163 * accept only INIT's. It will be incapable of sending off an INIT.
164 * When a dg arrives we must look in the normal ephash. If we find a
165 * TCP endpoint that will tell us to go to the specific endpoint
166 * hash and re-hash to find the right assoc/socket. If we find a UDP
167 * model socket we then must complete the lookup. If this fails,
168 * i.e. no association can be found then we must continue to see if
169 * a sctp_peeloff()'d socket is in the tcpephash (a spun off socket
170 * acts like a TCP model connected socket).
172 struct sctppcbhead *sctp_tcpephash;
174 uint32_t hashtblsize;
176 struct sctp_vrflist *sctp_vrfhash;
179 struct sctp_ifnlist *vrf_ifn_hash;
180 u_long vrf_ifn_hashmark;
182 struct sctppcbhead listhead;
183 struct sctpladdr addr_wq;
186 sctp_zone_t ipi_zone_ep;
187 sctp_zone_t ipi_zone_asoc;
188 sctp_zone_t ipi_zone_laddr;
189 sctp_zone_t ipi_zone_net;
190 sctp_zone_t ipi_zone_chunk;
191 sctp_zone_t ipi_zone_readq;
192 sctp_zone_t ipi_zone_strmoq;
193 sctp_zone_t ipi_zone_asconf;
194 sctp_zone_t ipi_zone_asconf_ack;
196 struct rwlock ipi_ep_mtx;
197 struct mtx ipi_iterator_wq_mtx;
198 struct rwlock ipi_addr_mtx;
199 struct mtx ipi_pktlog_mtx;
200 struct mtx wq_addr_mtx;
201 uint32_t ipi_count_ep;
203 /* assoc/tcb zone info */
204 uint32_t ipi_count_asoc;
206 /* local addrlist zone info */
207 uint32_t ipi_count_laddr;
209 /* remote addrlist zone info */
210 uint32_t ipi_count_raddr;
212 /* chunk structure list for output */
213 uint32_t ipi_count_chunk;
215 /* socket queue zone info */
216 uint32_t ipi_count_readq;
218 /* socket queue zone info */
219 uint32_t ipi_count_strmoq;
222 uint32_t ipi_count_vrfs;
225 uint32_t ipi_count_ifns;
228 uint32_t ipi_count_ifas;
230 /* system wide number of free chunks hanging around */
231 uint32_t ipi_free_chunks;
232 uint32_t ipi_free_strmoq;
234 struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE];
236 /* address work queue handling */
237 struct sctp_timer addr_wq_timer;
242 struct sctp_base_info {
244 * All static structures that anchor the system must be here.
246 struct sctp_epinfo sctppcbinfo;
247 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
248 struct sctpstat *sctpstat;
250 struct sctpstat sctpstat;
252 struct sctp_sysctl sctpsysctl;
254 char sctp_pcb_initialized;
255 #if defined(SCTP_PACKET_LOGGING)
256 int packet_log_writers;
258 uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
263 * Here we have all the relevant information for each SCTP entity created. We
264 * will need to modify this as approprate. We also need to figure out how to
265 * access /dev/random.
268 unsigned int time_of_secret_change; /* number of seconds from
270 uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS];
271 unsigned int size_of_a_cookie;
273 unsigned int sctp_timeoutticks[SCTP_NUM_TMRS];
274 unsigned int sctp_minrto;
275 unsigned int sctp_maxrto;
276 unsigned int initial_rto;
277 int initial_init_rto_max;
279 unsigned int sctp_sack_freq;
280 uint32_t sctp_sws_sender;
281 uint32_t sctp_sws_receiver;
283 uint32_t sctp_default_cc_module;
284 uint32_t sctp_default_ss_module;
285 /* authentication related fields */
286 struct sctp_keyhead shared_keys;
287 sctp_auth_chklist_t *local_auth_chunks;
288 sctp_hmaclist_t *local_hmacs;
289 uint16_t default_keyid;
291 /* various thresholds */
292 /* Max times I will init at a guy */
293 uint16_t max_init_times;
295 /* Max times I will send before we consider someone dead */
296 uint16_t max_send_times;
298 uint16_t def_net_failure;
300 uint16_t def_net_pf_threshold;
302 /* number of streams to pre-open on a association */
303 uint16_t pre_open_stream_count;
304 uint16_t max_open_streams_intome;
306 /* random number generator */
307 uint32_t random_counter;
308 uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE];
309 uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE];
312 * This timer is kept running per endpoint. When it fires it will
313 * change the secret key. The default is once a hour
315 struct sctp_timer signature_change;
317 /* Zero copy full buffer timer */
318 struct sctp_timer zero_copy_timer;
319 /* Zero copy app to transport (sendq) read repulse timer */
320 struct sctp_timer zero_copy_sendq_timer;
321 uint32_t def_cookie_life;
324 uint32_t initial_sequence_debug;
325 uint32_t adaptation_layer_indicator;
326 uint8_t adaptation_layer_indicator_provided;
329 uint32_t fr_max_burst;
331 uint32_t default_flowlabel;
333 uint8_t default_dscp;
334 char current_secret_number;
335 char last_secret_number;
336 uint16_t port; /* remote UDP encapsulation port */
339 #ifndef SCTP_ALIGNMENT
340 #define SCTP_ALIGNMENT 32
344 #define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1)
347 #define sctp_lport ip_inp.inp.inp_lport
349 struct sctp_pcbtsn_rlog {
357 #define SCTP_READ_LOG_SIZE 135 /* we choose the number to make a pcb a page */
362 * put an inpcb in front of it all, kind of a waste but we need to
363 * for compatability with all the other stuff.
367 char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) &
372 /* Socket buffer lock protects read_queue and of course sb_cc */
373 struct sctp_readhead read_queue;
375 LIST_ENTRY(sctp_inpcb) sctp_list; /* lists all endpoints */
376 /* hash of all endpoints for model */
377 LIST_ENTRY(sctp_inpcb) sctp_hash;
378 /* count of local addresses bound, 0 if bound all */
381 /* list of addrs in use by the EP, NULL if bound-all */
382 struct sctpladdr sctp_addr_list;
384 * used for source address selection rotation when we are subset
387 struct sctp_laddr *next_addr_touse;
389 /* back pointer to our socket */
390 struct socket *sctp_socket;
391 uint64_t sctp_features; /* Feature flags */
392 uint32_t sctp_flags; /* INP state flag set */
393 uint32_t sctp_mobility_features; /* Mobility Feature flags */
394 struct sctp_pcb sctp_ep;/* SCTP ep data */
395 /* head of the hash of all associations */
396 struct sctpasochead *sctp_tcbhash;
397 u_long sctp_hashmark;
398 /* head of the list of all associations */
399 struct sctpasochead sctp_asoc_list;
400 #ifdef SCTP_TRACK_FREED_ASOCS
401 struct sctpasochead sctp_asoc_free_list;
403 struct sctp_iterator *inp_starting_point_for_iterator;
404 uint32_t sctp_frag_point;
405 uint32_t partial_delivery_point;
406 uint32_t sctp_context;
407 uint8_t local_strreset_support;
408 uint32_t sctp_cmt_on_off;
409 uint8_t ecn_supported;
410 uint8_t prsctp_supported;
411 uint8_t auth_supported;
412 uint8_t asconf_supported;
413 uint8_t reconfig_supported;
414 uint8_t nrsack_supported;
415 uint8_t pktdrop_supported;
416 struct sctp_nonpad_sndrcvinfo def_send;
418 * These three are here for the sosend_dgram
419 * (pkt, pkt_last and control).
420 * routine. However, I don't think anyone in
421 * the current FreeBSD kernel calls this. So
422 * they are candidates with sctp_sendm for
425 struct mbuf *pkt, *pkt_last;
426 struct mbuf *control;
428 struct mtx inp_create_mtx;
429 struct mtx inp_rdata_mtx;
432 uint32_t total_sends;
433 uint32_t total_recvs;
434 uint32_t last_abort_code;
435 uint32_t total_nospaces;
436 struct sctpasochead *sctp_asocidhash;
437 u_long hashasocidmark;
438 uint32_t sctp_associd_counter;
440 #ifdef SCTP_ASOCLOG_OF_TSNS
441 struct sctp_pcbtsn_rlog readlog[SCTP_READ_LOG_SIZE];
442 uint32_t readlog_index;
447 struct socket *sctp_socket; /* back pointer to socket */
448 struct sctp_inpcb *sctp_ep; /* back pointer to ep */
449 LIST_ENTRY(sctp_tcb) sctp_tcbhash; /* next link in hash
451 LIST_ENTRY(sctp_tcb) sctp_tcblist; /* list of all of the
453 LIST_ENTRY(sctp_tcb) sctp_tcbasocidhash; /* next link in asocid
455 LIST_ENTRY(sctp_tcb) sctp_asocs; /* vtag hash list */
456 struct sctp_block_entry *block_entry; /* pointer locked by socket
458 struct sctp_association asoc;
460 * freed_by_sorcv_sincelast is protected by the sockbuf_lock NOT the
461 * tcb_lock. Its special in this way to help avoid extra mutex calls
462 * in the reading of data.
464 uint32_t freed_by_sorcv_sincelast;
465 uint32_t total_sends;
466 uint32_t total_recvs;
467 int freed_from_where;
468 uint16_t rport; /* remote port in network format */
471 struct mtx tcb_send_mtx;
476 #include <netinet/sctp_lock_bsd.h>
479 /* TODO where to put non-_KERNEL things for __Userspace__? */
480 #if defined(_KERNEL) || defined(__Userspace__)
482 /* Attention Julian, this is the extern that
483 * goes with the base info. sctp_pcb.c has
484 * the real definition.
486 VNET_DECLARE(struct sctp_base_info, system_base_info);
489 int SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b);
493 void sctp_fill_pcbinfo(struct sctp_pcbinfo *);
496 sctp_find_ifn(void *ifn, uint32_t ifn_index);
498 struct sctp_vrf *sctp_allocate_vrf(int vrfid);
499 struct sctp_vrf *sctp_find_vrf(uint32_t vrfid);
500 void sctp_free_vrf(struct sctp_vrf *vrf);
503 * Change address state, can be used if
504 * O/S supports telling transports about
505 * changes to IFA/IFN's (link layer triggers).
506 * If a ifn goes down, we will do src-addr-selection
507 * and NOT use that, as a source address. This does
508 * not stop the routing system from routing out
509 * that interface, but we won't put it as a source.
511 void sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
512 void sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
515 sctp_add_addr_to_vrf(uint32_t vrfid,
516 void *ifn, uint32_t ifn_index, uint32_t ifn_type,
518 void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
521 void sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu);
523 void sctp_free_ifn(struct sctp_ifn *sctp_ifnp);
524 void sctp_free_ifa(struct sctp_ifa *sctp_ifap);
528 sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr,
529 uint32_t ifn_index, const char *if_name);
533 struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);
535 struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int, uint32_t);
538 sctp_inpcb_bind(struct socket *, struct sockaddr *,
539 struct sctp_ifa *, struct thread *);
542 sctp_findassociation_addr(struct mbuf *, int,
543 struct sockaddr *, struct sockaddr *,
544 struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **,
545 struct sctp_nets **, uint32_t vrf_id);
548 sctp_findassociation_addr_sa(struct sockaddr *,
549 struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int, uint32_t);
552 sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *,
556 * For this call ep_addr, the to is the destination endpoint address of the
557 * peer (relative to outbound). The from field is only used if the TCP model
558 * is enabled and helps distingush amongst the subset bound (non-boundall).
559 * The TCP model MAY change the actual ep field, this is why it is passed.
562 sctp_findassociation_ep_addr(struct sctp_inpcb **,
563 struct sockaddr *, struct sctp_nets **, struct sockaddr *,
567 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock);
570 sctp_findassociation_ep_asocid(struct sctp_inpcb *,
574 sctp_findassociation_ep_asconf(struct mbuf *, int, struct sockaddr *,
575 struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **, uint32_t vrf_id);
577 int sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id);
579 int sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id);
581 void sctp_inpcb_free(struct sctp_inpcb *, int, int);
584 sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *,
585 int *, uint32_t, uint32_t, struct thread *);
587 int sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *, int, int);
590 void sctp_delete_from_timewait(uint32_t, uint16_t, uint16_t);
592 int sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport);
595 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport);
597 void sctp_add_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *, uint32_t);
599 int sctp_insert_laddr(struct sctpladdr *, struct sctp_ifa *, uint32_t);
601 void sctp_remove_laddr(struct sctp_laddr *);
603 void sctp_del_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *);
605 int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, struct sctp_nets **, int, int);
607 void sctp_remove_net(struct sctp_tcb *, struct sctp_nets *);
609 int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *);
611 void sctp_pcb_init(void);
613 void sctp_pcb_finish(void);
615 void sctp_add_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
616 void sctp_del_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
619 sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int, int,
620 struct sockaddr *, struct sockaddr *, struct sockaddr *);
623 sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *,
626 int sctp_is_vtag_good(uint32_t, uint16_t lport, uint16_t rport, struct timeval *);
628 /* void sctp_drain(void); */
630 int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *);
632 int sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp);
635 * Null in last arg inpcb indicate run on ALL ep's. Specific inp in last arg
636 * indicates run on ONLY assoc's of the specified endpoint.
639 sctp_initiate_iterator(inp_func inpf,
649 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
651 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use);
657 sctp_validate_no_locks(struct sctp_inpcb *inp);
662 #endif /* !__sctp_pcb_h__ */