2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1982, 1986, 1990, 1993
5 * The Regents of the University of California.
6 * Copyright (c) 2010-2011 Juniper Networks, Inc.
9 * Portions of this software were developed by Robert N. M. Watson under
10 * contract to Juniper Networks, Inc.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)in_pcb.h 8.1 (Berkeley) 6/10/93
40 #ifndef _NETINET_IN_PCB_H_
41 #define _NETINET_IN_PCB_H_
43 #include <sys/queue.h>
44 #include <sys/epoch.h>
45 #include <sys/_lock.h>
46 #include <sys/_mutex.h>
47 #include <sys/_rwlock.h>
48 #include <net/route.h>
52 #include <sys/rwlock.h>
59 * struct inpcb is the common protocol control block structure used in most
60 * IP transport protocols.
62 * Pointers to local and foreign host table entries, local and foreign socket
63 * numbers, and pointers up (to a socket structure) and down (to a
64 * protocol-specific control block) are stored here.
66 CK_LIST_HEAD(inpcbhead, inpcb);
67 CK_LIST_HEAD(inpcbporthead, inpcbport);
68 CK_LIST_HEAD(inpcblbgrouphead, inpcblbgroup);
69 typedef uint64_t inp_gen_t;
72 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet.
73 * So, AF_INET6 null laddr is also used as AF_INET null laddr, by utilizing
74 * the following structure.
77 u_int32_t ia46_pad32[3];
78 struct in_addr ia46_addr4;
82 struct in_addr_4in6 id46_addr;
83 struct in6_addr id6_addr;
87 * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553. in_conninfo has
88 * some extra padding to accomplish this.
89 * NOTE 2: tcp_syncache.c uses first 5 32-bit words, which identify fport,
90 * lport, faddr to generate hash, so these fields shouldn't be moved.
93 u_int16_t ie_fport; /* foreign port */
94 u_int16_t ie_lport; /* local port */
95 /* protocol dependent part, local and foreign addr */
96 union in_dependaddr ie_dependfaddr; /* foreign host table entry */
97 union in_dependaddr ie_dependladdr; /* local host table entry */
98 #define ie_faddr ie_dependfaddr.id46_addr.ia46_addr4
99 #define ie_laddr ie_dependladdr.id46_addr.ia46_addr4
100 #define ie6_faddr ie_dependfaddr.id6_addr
101 #define ie6_laddr ie_dependladdr.id6_addr
102 u_int32_t ie6_zoneid; /* scope zone id */
106 * XXX The defines for inc_* are hacks and should be changed to direct
112 u_int16_t inc_fibnum; /* XXX was pad, 16 bits is plenty */
113 /* protocol dependent part */
114 struct in_endpoints inc_ie;
118 * Flags for inc_flags.
120 #define INC_ISIPV6 0x01
121 #define INC_IPV6MINMTU 0x02
123 #define inc_fport inc_ie.ie_fport
124 #define inc_lport inc_ie.ie_lport
125 #define inc_faddr inc_ie.ie_faddr
126 #define inc_laddr inc_ie.ie_laddr
127 #define inc6_faddr inc_ie.ie6_faddr
128 #define inc6_laddr inc_ie.ie6_laddr
129 #define inc6_zoneid inc_ie.ie6_zoneid
131 #if defined(_KERNEL) || defined(_WANT_INPCB)
133 * struct inpcb captures the network layer state for TCP, UDP, and raw IPv4 and
134 * IPv6 sockets. In the case of TCP and UDP, further per-connection state is
135 * hung off of inp_ppcb most of the time. Almost all fields of struct inpcb
136 * are static after creation or protected by a per-inpcb rwlock, inp_lock. A
137 * few fields are protected by multiple locks as indicated in the locking notes
138 * below. For these fields, all of the listed locks must be write-locked for
139 * any modifications. However, these fields can be safely read while any one of
140 * the listed locks are read-locked. This model can permit greater concurrency
141 * for read operations. For example, connections can be looked up while only
142 * holding a read lock on the global pcblist lock. This is important for
143 * performance when attempting to find the connection for a packet given its IP
146 * One noteworthy exception is that the global pcbinfo lock follows a different
147 * set of rules in relation to the inp_list field. Rather than being
148 * write-locked for modifications and read-locked for list iterations, it must
149 * be read-locked during modifications and write-locked during list iterations.
150 * This ensures that the relatively rare global list iterations safely walk a
151 * stable snapshot of connections while allowing more common list modifications
152 * to safely grab the pcblist lock just while adding or removing a connection
153 * from the global list.
156 * (b) - Protected by the hpts lock.
157 * (c) - Constant after initialization
158 * (e) - Protected by the net_epoch_prempt epoch
159 * (g) - Protected by the pcbgroup lock
160 * (i) - Protected by the inpcb lock
161 * (p) - Protected by the pcbinfo lock for the inpcb
162 * (l) - Protected by the pcblist lock for the inpcb
163 * (h) - Protected by the pcbhash lock for the inpcb
164 * (s) - Protected by another subsystem's locks
165 * (x) - Undefined locking
167 * Notes on the tcp_hpts:
169 * First Hpts lock order is
171 * 2) HPTS_LOCK() i.e. hpts->pmtx
173 * To insert a TCB on the hpts you *must* be holding the INP_WLOCK().
174 * You may check the inp->inp_in_hpts flag without the hpts lock.
175 * The hpts is the only one that will clear this flag holding
176 * only the hpts lock. This means that in your tcp_output()
177 * routine when you test for the inp_in_hpts flag to be 1
178 * it may be transitioning to 0 (by the hpts).
179 * That's ok since that will just mean an extra call to tcp_output
180 * that most likely will find the call you executed
181 * (when the mis-match occured) will have put the TCB back
182 * on the hpts and it will return. If your
183 * call did not add the inp back to the hpts then you will either
184 * over-send or the cwnd will block you from sending more.
186 * Note you should also be holding the INP_WLOCK() when you
187 * call the remove from the hpts as well. Though usually
188 * you are either doing this from a timer, where you need and have
189 * the INP_WLOCK() or from destroying your TCB where again
190 * you should already have the INP_WLOCK().
192 * The inp_hpts_cpu, inp_hpts_cpu_set, inp_input_cpu and
193 * inp_input_cpu_set fields are controlled completely by
194 * the hpts. Do not ever set these. The inp_hpts_cpu_set
195 * and inp_input_cpu_set fields indicate if the hpts has
196 * setup the respective cpu field. It is advised if this
197 * field is 0, to enqueue the packet with the appropriate
198 * hpts_immediate() call. If the _set field is 1, then
199 * you may compare the inp_*_cpu field to the curcpu and
200 * may want to again insert onto the hpts if these fields
201 * are not equal (i.e. you are not on the expected CPU).
203 * A note on inp_hpts_calls and inp_input_calls, these
204 * flags are set when the hpts calls either the output
205 * or do_segment routines respectively. If the routine
206 * being called wants to use this, then it needs to
207 * clear the flag before returning. The hpts will not
208 * clear the flag. The flags can be used to tell if
209 * the hpts is the function calling the respective
214 * When a read lock is held, stability of the field is guaranteed; to write
215 * to a field, a write lock must generally be held.
217 * netinet/netinet6-layer code should not assume that the inp_socket pointer
218 * is safe to dereference without inp_lock being held, even for protocols
219 * other than TCP (where the inpcb persists during TIMEWAIT even after the
220 * socket has been freed), or there may be close(2)-related races.
222 * The inp_vflag field is overloaded, and would otherwise ideally be (c).
224 * TODO: Currently only the TCP stack is leveraging the global pcbinfo lock
225 * read-lock usage during modification, this model can be applied to other
226 * protocols (especially SCTP).
232 /* Cache line #1 (amd64) */
233 CK_LIST_ENTRY(inpcb) inp_hash; /* [w](h/i) [r](e/i) hash list */
234 CK_LIST_ENTRY(inpcb) inp_pcbgrouphash; /* (g/i) hash list */
235 struct rwlock inp_lock;
236 /* Cache line #2 (amd64) */
237 #define inp_start_zero inp_hpts
238 #define inp_zero_size (sizeof(struct inpcb) - \
239 offsetof(struct inpcb, inp_start_zero))
240 TAILQ_ENTRY(inpcb) inp_hpts; /* pacing out queue next lock(b) */
242 uint32_t inp_hpts_request; /* Current hpts request, zero if
243 * fits in the pacing window (i&b). */
245 * Note the next fields are protected by a
246 * different lock (hpts-lock). This means that
247 * they must correspond in size to the smallest
248 * protectable bit field (uint8_t on x86, and
249 * other platfomrs potentially uint32_t?). Also
250 * since CPU switches can occur at different times the two
251 * fields can *not* be collapsed into a signal bit field.
253 #if defined(__amd64__) || defined(__i386__)
254 volatile uint8_t inp_in_hpts; /* on output hpts (lock b) */
255 volatile uint8_t inp_in_input; /* on input hpts (lock b) */
257 volatile uint32_t inp_in_hpts; /* on output hpts (lock b) */
258 volatile uint32_t inp_in_input; /* on input hpts (lock b) */
260 volatile uint16_t inp_hpts_cpu; /* Lock (i) */
261 u_int inp_refcount; /* (i) refcount */
262 int inp_flags; /* (i) generic IP/datagram flags */
263 int inp_flags2; /* (i) generic IP/datagram flags #2*/
264 volatile uint16_t inp_input_cpu; /* Lock (i) */
265 volatile uint8_t inp_hpts_cpu_set :1, /* on output hpts (i) */
266 inp_input_cpu_set : 1, /* on input hpts (i) */
267 inp_hpts_calls :1, /* (i) from output hpts */
268 inp_input_calls :1, /* (i) from input hpts */
270 uint8_t inp_numa_domain; /* numa domain */
271 void *inp_ppcb; /* (i) pointer to per-protocol pcb */
272 struct socket *inp_socket; /* (i) back pointer to socket */
273 uint32_t inp_hptsslot; /* Hpts wheel slot this tcb is Lock(i&b) */
274 uint32_t inp_hpts_drop_reas; /* reason we are dropping the PCB (lock i&b) */
275 TAILQ_ENTRY(inpcb) inp_input; /* pacing in queue next lock(b) */
276 struct inpcbinfo *inp_pcbinfo; /* (c) PCB list info */
277 struct inpcbgroup *inp_pcbgroup; /* (g/i) PCB group list */
278 CK_LIST_ENTRY(inpcb) inp_pcbgroup_wild; /* (g/i/h) group wildcard entry */
279 struct ucred *inp_cred; /* (c) cache of socket cred */
280 u_int32_t inp_flow; /* (i) IPv6 flow information */
281 u_char inp_vflag; /* (i) IP version flag (v4/v6) */
282 u_char inp_ip_ttl; /* (i) time to live proto */
283 u_char inp_ip_p; /* (c) protocol proto */
284 u_char inp_ip_minttl; /* (i) minimum TTL or drop */
285 uint32_t inp_flowid; /* (x) flow id / queue id */
286 struct m_snd_tag *inp_snd_tag; /* (i) send tag for outgoing mbufs */
287 uint32_t inp_flowtype; /* (x) M_HASHTYPE value */
288 uint32_t inp_rss_listen_bucket; /* (x) overridden RSS listen bucket */
290 /* Local and foreign ports, local and foreign addr. */
291 struct in_conninfo inp_inc; /* (i) list for PCB's local port */
293 /* MAC and IPSEC policy information. */
294 struct label *inp_label; /* (i) MAC label */
295 struct inpcbpolicy *inp_sp; /* (s) for IPSEC */
297 /* Protocol-dependent part; options. */
299 u_char inp_ip_tos; /* (i) type of service proto */
300 struct mbuf *inp_options; /* (i) IP options */
301 struct ip_moptions *inp_moptions; /* (i) mcast options */
305 struct mbuf *in6p_options;
306 /* (i) IP6 options for outgoing packets */
307 struct ip6_pktopts *in6p_outputopts;
308 /* (i) IP multicast options */
309 struct ip6_moptions *in6p_moptions;
310 /* (i) ICMPv6 code type filter */
311 struct icmp6_filter *in6p_icmp6filt;
312 /* (i) IPV6_CHECKSUM setsockopt */
316 CK_LIST_ENTRY(inpcb) inp_portlist; /* (i/h) */
317 struct inpcbport *inp_phd; /* (i/h) head of this list */
318 inp_gen_t inp_gencnt; /* (c) generation count */
319 void *spare_ptr; /* Spare pointer. */
320 rt_gen_t inp_rt_cookie; /* generation for route entry */
321 union { /* cached L3 information */
322 struct route inp_route;
323 struct route_in6 inp_route6;
325 CK_LIST_ENTRY(inpcb) inp_list; /* (p/l) list for all PCBs for proto */
326 /* (e[r]) for list iteration */
327 /* (p[w]/l) for addition/removal */
328 struct epoch_context inp_epoch_ctx;
332 #define inp_fport inp_inc.inc_fport
333 #define inp_lport inp_inc.inc_lport
334 #define inp_faddr inp_inc.inc_faddr
335 #define inp_laddr inp_inc.inc_laddr
337 #define in6p_faddr inp_inc.inc6_faddr
338 #define in6p_laddr inp_inc.inc6_laddr
339 #define in6p_zoneid inp_inc.inc6_zoneid
341 #define inp_vnet inp_pcbinfo->ipi_vnet
344 * The range of the generation count, as used in this implementation, is 9e19.
345 * We would have to create 300 billion connections per second for this number
346 * to roll over in a year. This seems sufficiently unlikely that we simply
347 * don't concern ourselves with that possibility.
351 * Interface exported to userland by various protocols which use inpcbs. Hack
352 * alert -- only define if struct xsocket is in scope.
353 * Fields prefixed with "xi_" are unique to this structure, and the rest
354 * match fields in the struct inpcb, to ease coding and porting.
357 * (s) - used by userland utilities in src
358 * (p) - used by utilities in ports
359 * (3) - is known to be used by third party software not in ports
360 * (n) - no known usage
362 #ifdef _SYS_SOCKETVAR_H_
364 ksize_t xi_len; /* length of this structure */
365 struct xsocket xi_socket; /* (s,p) */
366 struct in_conninfo inp_inc; /* (s,p) */
367 uint64_t inp_gencnt; /* (s,p) */
368 kvaddr_t inp_ppcb; /* (s) netstat(1) */
369 int64_t inp_spare64[4];
370 uint32_t inp_flow; /* (s) */
371 uint32_t inp_flowid; /* (s) */
372 uint32_t inp_flowtype; /* (s) */
373 int32_t inp_flags; /* (s,p) */
374 int32_t inp_flags2; /* (s) */
375 int32_t inp_rss_listen_bucket; /* (n) */
376 int32_t in6p_cksum; /* (n) */
377 int32_t inp_spare32[4];
378 uint16_t in6p_hops; /* (n) */
379 uint8_t inp_ip_tos; /* (n) */
381 uint8_t inp_vflag; /* (s,p) */
382 uint8_t inp_ip_ttl; /* (n) */
383 uint8_t inp_ip_p; /* (n) */
384 uint8_t inp_ip_minttl; /* (n) */
385 int8_t inp_spare8[4];
389 ksize_t xig_len; /* length of this structure */
390 u_int xig_count; /* number of PCBs at this time */
391 uint32_t _xig_spare32;
392 inp_gen_t xig_gen; /* generation count at this time */
393 so_gen_t xig_sogen; /* socket generation count this time */
394 uint64_t _xig_spare64[4];
397 void in_pcbtoxinpcb(const struct inpcb *, struct xinpcb *);
399 #endif /* _SYS_SOCKETVAR_H_ */
402 struct epoch_context phd_epoch_ctx;
403 CK_LIST_ENTRY(inpcbport) phd_hash;
404 struct inpcbhead phd_pcblist;
410 struct epoch_context il_epoch_ctx;
411 struct inpcbinfo *il_pcbinfo;
412 struct inpcb *il_inp_list[0];
416 * Global data structure for each high-level protocol (UDP, TCP, ...) in both
417 * IPv4 and IPv6. Holds inpcb lists and information for managing them.
419 * Each pcbinfo is protected by three locks: ipi_lock, ipi_hash_lock and
421 * - ipi_lock covering the global pcb list stability during loop iteration,
422 * - ipi_hash_lock covering the hashed lookup tables,
423 * - ipi_list_lock covering mutable global fields (such as the global
429 * inpcb locks (before)
430 * ipi_list locks (before)
431 * {ipi_hash_lock, pcbgroup locks}
435 * (c) Constant or nearly constant after initialisation
436 * (e) - Protected by the net_epoch_prempt epoch
437 * (g) Locked by ipi_lock
438 * (l) Locked by ipi_list_lock
439 * (h) Read using either net_epoch_preempt or inpcb lock; write requires both ipi_hash_lock and inpcb lock
440 * (p) Protected by one or more pcbgroup locks
441 * (x) Synchronisation properties poorly defined
445 * Global lock protecting inpcb list modification
450 * Global list of inpcbs on the protocol.
452 struct inpcbhead *ipi_listhead; /* [r](e) [w](g/l) */
453 u_int ipi_count; /* (l) */
456 * Generation count -- incremented each time a connection is allocated
459 u_quad_t ipi_gencnt; /* (l) */
462 * Fields associated with port lookup and allocation.
464 u_short ipi_lastport; /* (x) */
465 u_short ipi_lastlow; /* (x) */
466 u_short ipi_lasthi; /* (x) */
469 * UMA zone from which inpcbs are allocated for this protocol.
471 struct uma_zone *ipi_zone; /* (c) */
474 * Connection groups associated with this protocol. These fields are
475 * constant, but pcbgroup structures themselves are protected by
476 * per-pcbgroup locks.
478 struct inpcbgroup *ipi_pcbgroups; /* (c) */
479 u_int ipi_npcbgroups; /* (c) */
480 u_int ipi_hashfields; /* (c) */
483 * Global lock protecting modification non-pcbgroup hash lookup tables.
485 struct mtx ipi_hash_lock;
488 * Global hash of inpcbs, hashed by local and foreign addresses and
491 struct inpcbhead *ipi_hashbase; /* (h) */
492 u_long ipi_hashmask; /* (h) */
495 * Global hash of inpcbs, hashed by only local port number.
497 struct inpcbporthead *ipi_porthashbase; /* (h) */
498 u_long ipi_porthashmask; /* (h) */
501 * List of wildcard inpcbs for use with pcbgroups. In the past, was
502 * per-pcbgroup but is now global. All pcbgroup locks must be held
503 * to modify the list, so any is sufficient to read it.
505 struct inpcbhead *ipi_wildbase; /* (p) */
506 u_long ipi_wildmask; /* (p) */
509 * Load balance groups used for the SO_REUSEPORT_LB option,
510 * hashed by local port.
512 struct inpcblbgrouphead *ipi_lbgrouphashbase; /* (h) */
513 u_long ipi_lbgrouphashmask; /* (h) */
516 * Pointer to network stack instance
518 struct vnet *ipi_vnet; /* (c) */
526 * Global lock protecting global inpcb list, inpcb count, etc.
528 struct rwlock ipi_list_lock;
533 * Connection groups hold sets of connections that have similar CPU/thread
534 * affinity. Each connection belongs to exactly one connection group.
538 * Per-connection group hash of inpcbs, hashed by local and foreign
539 * addresses and port numbers.
541 struct inpcbhead *ipg_hashbase; /* (c) */
542 u_long ipg_hashmask; /* (c) */
545 * Notional affinity of this pcbgroup.
547 u_int ipg_cpu; /* (p) */
550 * Per-connection group lock, not to be confused with ipi_lock.
551 * Protects the hash table hung off the group, but also the global
552 * wildcard list in inpcbinfo.
555 } __aligned(CACHE_LINE_SIZE);
558 * Load balance groups used for the SO_REUSEPORT_LB socket option. Each group
559 * (or unique address:port combination) can be re-used at most
560 * INPCBLBGROUP_SIZMAX (256) times. The inpcbs are stored in il_inp which
561 * is dynamically resized as processes bind/unbind to that specific group.
563 struct inpcblbgroup {
564 CK_LIST_ENTRY(inpcblbgroup) il_list;
565 struct epoch_context il_epoch_ctx;
566 uint16_t il_lport; /* (c) */
567 u_char il_vflag; /* (c) */
570 union in_dependaddr il_dependladdr; /* (c) */
571 #define il_laddr il_dependladdr.id46_addr.ia46_addr4
572 #define il6_laddr il_dependladdr.id6_addr
573 uint32_t il_inpsiz; /* max count in il_inp[] (h) */
574 uint32_t il_inpcnt; /* cur count in il_inp[] (h) */
575 struct inpcb *il_inp[]; /* (h) */
578 #define INP_LOCK_INIT(inp, d, t) \
579 rw_init_flags(&(inp)->inp_lock, (t), RW_RECURSE | RW_DUPOK)
580 #define INP_LOCK_DESTROY(inp) rw_destroy(&(inp)->inp_lock)
581 #define INP_RLOCK(inp) rw_rlock(&(inp)->inp_lock)
582 #define INP_WLOCK(inp) rw_wlock(&(inp)->inp_lock)
583 #define INP_TRY_RLOCK(inp) rw_try_rlock(&(inp)->inp_lock)
584 #define INP_TRY_WLOCK(inp) rw_try_wlock(&(inp)->inp_lock)
585 #define INP_RUNLOCK(inp) rw_runlock(&(inp)->inp_lock)
586 #define INP_WUNLOCK(inp) rw_wunlock(&(inp)->inp_lock)
587 #define INP_UNLOCK(inp) rw_unlock(&(inp)->inp_lock)
588 #define INP_TRY_UPGRADE(inp) rw_try_upgrade(&(inp)->inp_lock)
589 #define INP_DOWNGRADE(inp) rw_downgrade(&(inp)->inp_lock)
590 #define INP_WLOCKED(inp) rw_wowned(&(inp)->inp_lock)
591 #define INP_LOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_LOCKED)
592 #define INP_RLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_RLOCKED)
593 #define INP_WLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_WLOCKED)
594 #define INP_UNLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_UNLOCKED)
597 * These locking functions are for inpcb consumers outside of sys/netinet,
598 * more specifically, they were added for the benefit of TOE drivers. The
599 * macros are reserved for use by the stack.
601 void inp_wlock(struct inpcb *);
602 void inp_wunlock(struct inpcb *);
603 void inp_rlock(struct inpcb *);
604 void inp_runlock(struct inpcb *);
606 #ifdef INVARIANT_SUPPORT
607 void inp_lock_assert(struct inpcb *);
608 void inp_unlock_assert(struct inpcb *);
610 #define inp_lock_assert(inp) do {} while (0)
611 #define inp_unlock_assert(inp) do {} while (0)
614 void inp_apply_all(void (*func)(struct inpcb *, void *), void *arg);
615 int inp_ip_tos_get(const struct inpcb *inp);
616 void inp_ip_tos_set(struct inpcb *inp, int val);
618 inp_inpcbtosocket(struct inpcb *inp);
620 inp_inpcbtotcpcb(struct inpcb *inp);
621 void inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
622 uint32_t *faddr, uint16_t *fp);
623 int inp_so_options(const struct inpcb *inp);
627 #define INP_INFO_LOCK_INIT(ipi, d) \
628 mtx_init(&(ipi)->ipi_lock, (d), NULL, MTX_DEF| MTX_RECURSE)
629 #define INP_INFO_LOCK_DESTROY(ipi) mtx_destroy(&(ipi)->ipi_lock)
630 #define INP_INFO_WLOCK(ipi) mtx_lock(&(ipi)->ipi_lock)
631 #define INP_INFO_TRY_WLOCK(ipi) mtx_trylock(&(ipi)->ipi_lock)
632 #define INP_INFO_WLOCKED(ipi) mtx_owned(&(ipi)->ipi_lock)
633 #define INP_INFO_WUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_lock)
634 #define INP_INFO_LOCK_ASSERT(ipi) MPASS(in_epoch(net_epoch_preempt) || mtx_owned(&(ipi)->ipi_lock))
635 #define INP_INFO_WLOCK_ASSERT(ipi) mtx_assert(&(ipi)->ipi_lock, MA_OWNED)
636 #define INP_INFO_WUNLOCK_ASSERT(ipi) \
637 mtx_assert(&(ipi)->ipi_lock, MA_NOTOWNED)
639 #define INP_LIST_LOCK_INIT(ipi, d) \
640 rw_init_flags(&(ipi)->ipi_list_lock, (d), 0)
641 #define INP_LIST_LOCK_DESTROY(ipi) rw_destroy(&(ipi)->ipi_list_lock)
642 #define INP_LIST_RLOCK(ipi) rw_rlock(&(ipi)->ipi_list_lock)
643 #define INP_LIST_WLOCK(ipi) rw_wlock(&(ipi)->ipi_list_lock)
644 #define INP_LIST_TRY_RLOCK(ipi) rw_try_rlock(&(ipi)->ipi_list_lock)
645 #define INP_LIST_TRY_WLOCK(ipi) rw_try_wlock(&(ipi)->ipi_list_lock)
646 #define INP_LIST_TRY_UPGRADE(ipi) rw_try_upgrade(&(ipi)->ipi_list_lock)
647 #define INP_LIST_RUNLOCK(ipi) rw_runlock(&(ipi)->ipi_list_lock)
648 #define INP_LIST_WUNLOCK(ipi) rw_wunlock(&(ipi)->ipi_list_lock)
649 #define INP_LIST_LOCK_ASSERT(ipi) \
650 rw_assert(&(ipi)->ipi_list_lock, RA_LOCKED)
651 #define INP_LIST_RLOCK_ASSERT(ipi) \
652 rw_assert(&(ipi)->ipi_list_lock, RA_RLOCKED)
653 #define INP_LIST_WLOCK_ASSERT(ipi) \
654 rw_assert(&(ipi)->ipi_list_lock, RA_WLOCKED)
655 #define INP_LIST_UNLOCK_ASSERT(ipi) \
656 rw_assert(&(ipi)->ipi_list_lock, RA_UNLOCKED)
658 #define INP_HASH_LOCK_INIT(ipi, d) mtx_init(&(ipi)->ipi_hash_lock, (d), NULL, MTX_DEF)
659 #define INP_HASH_LOCK_DESTROY(ipi) mtx_destroy(&(ipi)->ipi_hash_lock)
660 #define INP_HASH_WLOCK(ipi) mtx_lock(&(ipi)->ipi_hash_lock)
661 #define INP_HASH_WUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_hash_lock)
662 #define INP_HASH_LOCK_ASSERT(ipi) MPASS(in_epoch(net_epoch_preempt) || mtx_owned(&(ipi)->ipi_hash_lock))
663 #define INP_HASH_WLOCK_ASSERT(ipi) mtx_assert(&(ipi)->ipi_hash_lock, MA_OWNED);
665 #define INP_GROUP_LOCK_INIT(ipg, d) mtx_init(&(ipg)->ipg_lock, (d), NULL, \
667 #define INP_GROUP_LOCK_DESTROY(ipg) mtx_destroy(&(ipg)->ipg_lock)
669 #define INP_GROUP_LOCK(ipg) mtx_lock(&(ipg)->ipg_lock)
670 #define INP_GROUP_LOCK_ASSERT(ipg) mtx_assert(&(ipg)->ipg_lock, MA_OWNED)
671 #define INP_GROUP_UNLOCK(ipg) mtx_unlock(&(ipg)->ipg_lock)
673 #define INP_PCBHASH(faddr, lport, fport, mask) \
674 (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask))
675 #define INP_PCBPORTHASH(lport, mask) \
676 (ntohs((lport)) & (mask))
677 #define INP_PCBLBGROUP_PKTHASH(faddr, lport, fport) \
678 ((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport)))
679 #define INP6_PCBHASHKEY(faddr) ((faddr)->s6_addr32[3])
682 * Flags for inp_vflags -- historically version flags only
686 #define INP_IPV6PROTO 0x4 /* opened under IPv6 protocol */
689 * Flags for inp_flags.
691 #define INP_RECVOPTS 0x00000001 /* receive incoming IP options */
692 #define INP_RECVRETOPTS 0x00000002 /* receive IP options for reply */
693 #define INP_RECVDSTADDR 0x00000004 /* receive IP dst address */
694 #define INP_HDRINCL 0x00000008 /* user supplies entire IP header */
695 #define INP_HIGHPORT 0x00000010 /* user wants "high" port binding */
696 #define INP_LOWPORT 0x00000020 /* user wants "low" port binding */
697 #define INP_ANONPORT 0x00000040 /* port chosen for user */
698 #define INP_RECVIF 0x00000080 /* receive incoming interface */
699 #define INP_MTUDISC 0x00000100 /* user can do MTU discovery */
700 /* 0x000200 unused: was INP_FAITH */
701 #define INP_RECVTTL 0x00000400 /* receive incoming IP TTL */
702 #define INP_DONTFRAG 0x00000800 /* don't fragment packet */
703 #define INP_BINDANY 0x00001000 /* allow bind to any address */
704 #define INP_INHASHLIST 0x00002000 /* in_pcbinshash() has been called */
705 #define INP_RECVTOS 0x00004000 /* receive incoming IP TOS */
706 #define IN6P_IPV6_V6ONLY 0x00008000 /* restrict AF_INET6 socket for v6 */
707 #define IN6P_PKTINFO 0x00010000 /* receive IP6 dst and I/F */
708 #define IN6P_HOPLIMIT 0x00020000 /* receive hoplimit */
709 #define IN6P_HOPOPTS 0x00040000 /* receive hop-by-hop options */
710 #define IN6P_DSTOPTS 0x00080000 /* receive dst options after rthdr */
711 #define IN6P_RTHDR 0x00100000 /* receive routing header */
712 #define IN6P_RTHDRDSTOPTS 0x00200000 /* receive dstoptions before rthdr */
713 #define IN6P_TCLASS 0x00400000 /* receive traffic class value */
714 #define IN6P_AUTOFLOWLABEL 0x00800000 /* attach flowlabel automatically */
715 #define INP_TIMEWAIT 0x01000000 /* in TIMEWAIT, ppcb is tcptw */
716 #define INP_ONESBCAST 0x02000000 /* send all-ones broadcast */
717 #define INP_DROPPED 0x04000000 /* protocol drop flag */
718 #define INP_SOCKREF 0x08000000 /* strong socket reference */
719 #define INP_RESERVED_0 0x10000000 /* reserved field */
720 #define INP_RESERVED_1 0x20000000 /* reserved field */
721 #define IN6P_RFC2292 0x40000000 /* used RFC2292 API on the socket */
722 #define IN6P_MTU 0x80000000 /* receive path MTU */
724 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\
725 INP_RECVIF|INP_RECVTTL|INP_RECVTOS|\
726 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\
727 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\
728 IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\
732 * Flags for inp_flags2.
734 #define INP_2UNUSED1 0x00000001
735 #define INP_2UNUSED2 0x00000002
736 #define INP_PCBGROUPWILD 0x00000004 /* in pcbgroup wildcard list */
737 #define INP_REUSEPORT 0x00000008 /* SO_REUSEPORT option is set */
738 #define INP_FREED 0x00000010 /* inp itself is not valid */
739 #define INP_REUSEADDR 0x00000020 /* SO_REUSEADDR option is set */
740 #define INP_BINDMULTI 0x00000040 /* IP_BINDMULTI option is set */
741 #define INP_RSS_BUCKET_SET 0x00000080 /* IP_RSS_LISTEN_BUCKET is set */
742 #define INP_RECVFLOWID 0x00000100 /* populate recv datagram with flow info */
743 #define INP_RECVRSSBUCKETID 0x00000200 /* populate recv datagram with bucket id */
744 #define INP_RATE_LIMIT_CHANGED 0x00000400 /* rate limit needs attention */
745 #define INP_ORIGDSTADDR 0x00000800 /* receive IP dst address/port */
746 #define INP_CANNOT_DO_ECN 0x00001000 /* The stack does not do ECN */
747 #define INP_REUSEPORT_LB 0x00002000 /* SO_REUSEPORT_LB option is set */
748 #define INP_SUPPORTS_MBUFQ 0x00004000 /* Supports the mbuf queue method of LRO */
749 #define INP_MBUF_QUEUE_READY 0x00008000 /* The transport is pacing, inputs can be queued */
750 #define INP_DONT_SACK_QUEUE 0x00010000 /* If a sack arrives do not wake me */
751 #define INP_2PCP_SET 0x00020000 /* If the Eth PCP should be set explicitly */
752 #define INP_2PCP_BIT0 0x00040000 /* Eth PCP Bit 0 */
753 #define INP_2PCP_BIT1 0x00080000 /* Eth PCP Bit 1 */
754 #define INP_2PCP_BIT2 0x00100000 /* Eth PCP Bit 2 */
755 #define INP_2PCP_BASE INP_2PCP_BIT0
756 #define INP_2PCP_MASK (INP_2PCP_BIT0 | INP_2PCP_BIT1 | INP_2PCP_BIT2)
757 #define INP_2PCP_SHIFT 18 /* shift PCP field in/out of inp_flags2 */
759 * Flags passed to in_pcblookup*() functions.
761 #define INPLOOKUP_WILDCARD 0x00000001 /* Allow wildcard sockets. */
762 #define INPLOOKUP_RLOCKPCB 0x00000002 /* Return inpcb read-locked. */
763 #define INPLOOKUP_WLOCKPCB 0x00000004 /* Return inpcb write-locked. */
765 #define INPLOOKUP_MASK (INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB | \
768 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb)
770 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family
772 #define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af)
775 * Constants for pcbinfo.ipi_hashfields.
777 #define IPI_HASHFIELDS_NONE 0
778 #define IPI_HASHFIELDS_2TUPLE 1
779 #define IPI_HASHFIELDS_4TUPLE 2
782 VNET_DECLARE(int, ipport_reservedhigh);
783 VNET_DECLARE(int, ipport_reservedlow);
784 VNET_DECLARE(int, ipport_lowfirstauto);
785 VNET_DECLARE(int, ipport_lowlastauto);
786 VNET_DECLARE(int, ipport_firstauto);
787 VNET_DECLARE(int, ipport_lastauto);
788 VNET_DECLARE(int, ipport_hifirstauto);
789 VNET_DECLARE(int, ipport_hilastauto);
790 VNET_DECLARE(int, ipport_randomized);
791 VNET_DECLARE(int, ipport_randomcps);
792 VNET_DECLARE(int, ipport_randomtime);
793 VNET_DECLARE(int, ipport_stoprandom);
794 VNET_DECLARE(int, ipport_tcpallocs);
796 #define V_ipport_reservedhigh VNET(ipport_reservedhigh)
797 #define V_ipport_reservedlow VNET(ipport_reservedlow)
798 #define V_ipport_lowfirstauto VNET(ipport_lowfirstauto)
799 #define V_ipport_lowlastauto VNET(ipport_lowlastauto)
800 #define V_ipport_firstauto VNET(ipport_firstauto)
801 #define V_ipport_lastauto VNET(ipport_lastauto)
802 #define V_ipport_hifirstauto VNET(ipport_hifirstauto)
803 #define V_ipport_hilastauto VNET(ipport_hilastauto)
804 #define V_ipport_randomized VNET(ipport_randomized)
805 #define V_ipport_randomcps VNET(ipport_randomcps)
806 #define V_ipport_randomtime VNET(ipport_randomtime)
807 #define V_ipport_stoprandom VNET(ipport_stoprandom)
808 #define V_ipport_tcpallocs VNET(ipport_tcpallocs)
810 void in_pcbinfo_destroy(struct inpcbinfo *);
811 void in_pcbinfo_init(struct inpcbinfo *, const char *, struct inpcbhead *,
812 int, int, char *, uma_init, u_int);
814 int in_pcbbind_check_bindmulti(const struct inpcb *ni,
815 const struct inpcb *oi);
818 in_pcbgroup_byhash(struct inpcbinfo *, u_int, uint32_t);
820 in_pcbgroup_byinpcb(struct inpcb *);
822 in_pcbgroup_bytuple(struct inpcbinfo *, struct in_addr, u_short,
823 struct in_addr, u_short);
824 void in_pcbgroup_destroy(struct inpcbinfo *);
825 int in_pcbgroup_enabled(struct inpcbinfo *);
826 void in_pcbgroup_init(struct inpcbinfo *, u_int, int);
827 void in_pcbgroup_remove(struct inpcb *);
828 void in_pcbgroup_update(struct inpcb *);
829 void in_pcbgroup_update_mbuf(struct inpcb *, struct mbuf *);
831 void in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *);
832 int in_pcballoc(struct socket *, struct inpcbinfo *);
833 int in_pcbbind(struct inpcb *, struct sockaddr *, struct ucred *);
834 int in_pcb_lport_dest(struct inpcb *inp, struct sockaddr *lsa,
835 u_short *lportp, struct sockaddr *fsa, u_short fport,
836 struct ucred *cred, int lookupflags);
837 int in_pcb_lport(struct inpcb *, struct in_addr *, u_short *,
838 struct ucred *, int);
839 int in_pcbbind_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
840 u_short *, struct ucred *);
841 int in_pcbconnect(struct inpcb *, struct sockaddr *, struct ucred *);
842 int in_pcbconnect_mbuf(struct inpcb *, struct sockaddr *, struct ucred *,
843 struct mbuf *, bool);
844 int in_pcbconnect_setup(struct inpcb *, struct sockaddr *, in_addr_t *,
845 u_short *, in_addr_t *, u_short *, struct inpcb **,
847 void in_pcbdetach(struct inpcb *);
848 void in_pcbdisconnect(struct inpcb *);
849 void in_pcbdrop(struct inpcb *);
850 void in_pcbfree(struct inpcb *);
851 int in_pcbinshash(struct inpcb *);
852 int in_pcbinshash_mbuf(struct inpcb *, struct mbuf *);
853 int in_pcbladdr(struct inpcb *, struct in_addr *, struct in_addr *,
856 in_pcblookup_local(struct inpcbinfo *,
857 struct in_addr, u_short, int, struct ucred *);
859 in_pcblookup(struct inpcbinfo *, struct in_addr, u_int,
860 struct in_addr, u_int, int, struct ifnet *);
862 in_pcblookup_mbuf(struct inpcbinfo *, struct in_addr, u_int,
863 struct in_addr, u_int, int, struct ifnet *, struct mbuf *);
864 void in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr,
865 int, struct inpcb *(*)(struct inpcb *, int));
866 void in_pcbref(struct inpcb *);
867 void in_pcbrehash(struct inpcb *);
868 void in_pcbrehash_mbuf(struct inpcb *, struct mbuf *);
869 int in_pcbrele(struct inpcb *);
870 int in_pcbrele_rlocked(struct inpcb *);
871 int in_pcbrele_wlocked(struct inpcb *);
872 void in_pcblist_rele_rlocked(epoch_context_t ctx);
873 void in_losing(struct inpcb *);
874 void in_pcbsetsolabel(struct socket *so);
875 int in_getpeeraddr(struct socket *so, struct sockaddr **nam);
876 int in_getsockaddr(struct socket *so, struct sockaddr **nam);
878 in_sockaddr(in_port_t port, struct in_addr *addr);
879 void in_pcbsosetlabel(struct socket *so);
882 in_pcboutput_txrtlmt_locked(struct inpcb *, struct ifnet *,
883 struct mbuf *, uint32_t);
884 int in_pcbattach_txrtlmt(struct inpcb *, struct ifnet *, uint32_t, uint32_t,
885 uint32_t, struct m_snd_tag **);
886 void in_pcbdetach_txrtlmt(struct inpcb *);
887 void in_pcbdetach_tag(struct ifnet *ifp, struct m_snd_tag *mst);
888 int in_pcbmodify_txrtlmt(struct inpcb *, uint32_t);
889 int in_pcbquery_txrtlmt(struct inpcb *, uint32_t *);
890 int in_pcbquery_txrlevel(struct inpcb *, uint32_t *);
891 void in_pcboutput_txrtlmt(struct inpcb *, struct ifnet *, struct mbuf *);
892 void in_pcboutput_eagain(struct inpcb *);
896 #endif /* !_NETINET_IN_PCB_H_ */