1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. 6 * Copyright (c) 2010-2011 Juniper Networks, Inc. 7 * All rights reserved. 8 * 9 * Portions of this software were developed by Robert N. M. Watson under 10 * contract to Juniper Networks, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 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. 23 * 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 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef _NETINET_IN_PCB_H_ 38 #define _NETINET_IN_PCB_H_ 39 40 #include <sys/queue.h> 41 #include <sys/epoch.h> 42 #include <sys/_lock.h> 43 #include <sys/_mutex.h> 44 #include <sys/_rwlock.h> 45 #include <sys/_smr.h> 46 #include <net/route.h> 47 48 #ifdef _KERNEL 49 #include <sys/lock.h> 50 #include <sys/proc.h> 51 #include <sys/rwlock.h> 52 #include <sys/sysctl.h> 53 #include <net/vnet.h> 54 #include <vm/uma.h> 55 #endif 56 #include <sys/ck.h> 57 58 /* 59 * struct inpcb is the common protocol control block structure used in most 60 * IP transport protocols. 61 * 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. 65 */ 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; 70 71 /* 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. This requires padding always be zeroed out, 75 * which is done right after inpcb allocation and stays through its lifetime. 76 */ 77 struct in_addr_4in6 { 78 u_int32_t ia46_pad32[3]; 79 struct in_addr ia46_addr4; 80 }; 81 82 union in_dependaddr { 83 struct in_addr_4in6 id46_addr; 84 struct in6_addr id6_addr; 85 }; 86 87 /* 88 * NOTE: ipv6 addrs should be 64-bit aligned, per RFC 2553. in_conninfo has 89 * some extra padding to accomplish this. 90 * NOTE 2: tcp_syncache.c uses first 5 32-bit words, which identify fport, 91 * lport, faddr to generate hash, so these fields shouldn't be moved. 92 */ 93 struct in_endpoints { 94 u_int16_t ie_fport; /* foreign port */ 95 u_int16_t ie_lport; /* local port */ 96 /* protocol dependent part, local and foreign addr */ 97 union in_dependaddr ie_dependfaddr; /* foreign host table entry */ 98 union in_dependaddr ie_dependladdr; /* local host table entry */ 99 #define ie_faddr ie_dependfaddr.id46_addr.ia46_addr4 100 #define ie_laddr ie_dependladdr.id46_addr.ia46_addr4 101 #define ie6_faddr ie_dependfaddr.id6_addr 102 #define ie6_laddr ie_dependladdr.id6_addr 103 u_int32_t ie6_zoneid; /* scope zone id */ 104 }; 105 106 /* 107 * XXX The defines for inc_* are hacks and should be changed to direct 108 * references. 109 */ 110 struct in_conninfo { 111 u_int8_t inc_flags; 112 u_int8_t inc_len; 113 u_int16_t inc_fibnum; /* XXX was pad, 16 bits is plenty */ 114 /* protocol dependent part */ 115 struct in_endpoints inc_ie; 116 }; 117 118 /* 119 * Flags for inc_flags. 120 */ 121 #define INC_ISIPV6 0x01 122 #define INC_IPV6MINMTU 0x02 123 124 #define inc_fport inc_ie.ie_fport 125 #define inc_lport inc_ie.ie_lport 126 #define inc_faddr inc_ie.ie_faddr 127 #define inc_laddr inc_ie.ie_laddr 128 #define inc6_faddr inc_ie.ie6_faddr 129 #define inc6_laddr inc_ie.ie6_laddr 130 #define inc6_zoneid inc_ie.ie6_zoneid 131 132 #if defined(_KERNEL) || defined(_WANT_INPCB) 133 /* 134 * struct inpcb captures the network layer state for TCP, UDP, and raw IPv4 and 135 * IPv6 sockets. In the case of TCP and UDP, further per-connection state is 136 * hung off of inp_ppcb most of the time. Almost all fields of struct inpcb 137 * are static after creation or protected by a per-inpcb rwlock, inp_lock. 138 * 139 * A inpcb database is indexed by addresses/ports hash as well as list of 140 * all pcbs that belong to a certain proto. Database lookups or list traversals 141 * are be performed inside SMR section. Once desired PCB is found its own 142 * lock is to be obtained and SMR section exited. 143 * 144 * Key: 145 * (c) - Constant after initialization 146 * (e) - Protected by the SMR section 147 * (i) - Protected by the inpcb lock 148 * (p) - Protected by the pcbinfo lock for the inpcb 149 * (h) - Protected by the pcbhash lock for the inpcb 150 * (s) - Protected by another subsystem's locks 151 * (x) - Undefined locking 152 * 153 * A few other notes: 154 * 155 * When a read lock is held, stability of the field is guaranteed; to write 156 * to a field, a write lock must generally be held. 157 * 158 * netinet/netinet6-layer code should not assume that the inp_socket pointer 159 * is safe to dereference without inp_lock being held, there may be 160 * close(2)-related races. 161 * 162 * The inp_vflag field is overloaded, and would otherwise ideally be (c). 163 */ 164 struct icmp6_filter; 165 struct inpcbpolicy; 166 struct m_snd_tag; 167 struct inpcb { 168 /* Cache line #1 (amd64) */ 169 CK_LIST_ENTRY(inpcb) inp_hash_exact; /* hash table linkage */ 170 CK_LIST_ENTRY(inpcb) inp_hash_wild; /* hash table linkage */ 171 struct rwlock inp_lock; 172 /* Cache line #2 (amd64) */ 173 #define inp_start_zero inp_refcount 174 #define inp_zero_size (sizeof(struct inpcb) - \ 175 offsetof(struct inpcb, inp_start_zero)) 176 u_int inp_refcount; /* (i) refcount */ 177 int inp_flags; /* (i) generic IP/datagram flags */ 178 int inp_flags2; /* (i) generic IP/datagram flags #2*/ 179 uint8_t inp_numa_domain; /* numa domain */ 180 void *inp_ppcb; /* (i) pointer to per-protocol pcb */ 181 struct socket *inp_socket; /* (i) back pointer to socket */ 182 struct inpcbinfo *inp_pcbinfo; /* (c) PCB list info */ 183 struct ucred *inp_cred; /* (c) cache of socket cred */ 184 u_int32_t inp_flow; /* (i) IPv6 flow information */ 185 u_char inp_vflag; /* (i) IP version flag (v4/v6) */ 186 u_char inp_ip_ttl; /* (i) time to live proto */ 187 u_char inp_ip_p; /* (c) protocol proto */ 188 u_char inp_ip_minttl; /* (i) minimum TTL or drop */ 189 uint32_t inp_flowid; /* (x) flow id / queue id */ 190 smr_seq_t inp_smr; /* (i) sequence number at disconnect */ 191 struct m_snd_tag *inp_snd_tag; /* (i) send tag for outgoing mbufs */ 192 uint32_t inp_flowtype; /* (x) M_HASHTYPE value */ 193 194 /* Local and foreign ports, local and foreign addr. */ 195 struct in_conninfo inp_inc; /* (i,h) list for PCB's local port */ 196 197 /* MAC and IPSEC policy information. */ 198 struct label *inp_label; /* (i) MAC label */ 199 struct inpcbpolicy *inp_sp; /* (s) for IPSEC */ 200 201 /* Protocol-dependent part; options. */ 202 struct { 203 u_char inp_ip_tos; /* (i) type of service proto */ 204 struct mbuf *inp_options; /* (i) IP options */ 205 struct ip_moptions *inp_moptions; /* (i) mcast options */ 206 }; 207 struct { 208 /* (i) IP options */ 209 struct mbuf *in6p_options; 210 /* (i) IP6 options for outgoing packets */ 211 struct ip6_pktopts *in6p_outputopts; 212 /* (i) IP multicast options */ 213 struct ip6_moptions *in6p_moptions; 214 /* (i) ICMPv6 code type filter */ 215 struct icmp6_filter *in6p_icmp6filt; 216 /* (i) IPV6_CHECKSUM setsockopt */ 217 int in6p_cksum; 218 short in6p_hops; 219 }; 220 CK_LIST_ENTRY(inpcb) inp_portlist; /* (r:e/w:h) port list */ 221 struct inpcbport *inp_phd; /* (r:e/w:h) head of this list */ 222 inp_gen_t inp_gencnt; /* (c) generation count */ 223 void *spare_ptr; /* Spare pointer. */ 224 rt_gen_t inp_rt_cookie; /* generation for route entry */ 225 union { /* cached L3 information */ 226 struct route inp_route; 227 struct route_in6 inp_route6; 228 }; 229 CK_LIST_ENTRY(inpcb) inp_list; /* (r:e/w:p) all PCBs for proto */ 230 }; 231 #endif /* _KERNEL */ 232 233 #define inp_fport inp_inc.inc_fport 234 #define inp_lport inp_inc.inc_lport 235 #define inp_faddr inp_inc.inc_faddr 236 #define inp_laddr inp_inc.inc_laddr 237 238 #define in6p_faddr inp_inc.inc6_faddr 239 #define in6p_laddr inp_inc.inc6_laddr 240 #define in6p_zoneid inp_inc.inc6_zoneid 241 242 #define inp_vnet inp_pcbinfo->ipi_vnet 243 244 /* 245 * The range of the generation count, as used in this implementation, is 9e19. 246 * We would have to create 300 billion connections per second for this number 247 * to roll over in a year. This seems sufficiently unlikely that we simply 248 * don't concern ourselves with that possibility. 249 */ 250 251 /* 252 * Interface exported to userland by various protocols which use inpcbs. Hack 253 * alert -- only define if struct xsocket is in scope. 254 * Fields prefixed with "xi_" are unique to this structure, and the rest 255 * match fields in the struct inpcb, to ease coding and porting. 256 * 257 * Legend: 258 * (s) - used by userland utilities in src 259 * (p) - used by utilities in ports 260 * (3) - is known to be used by third party software not in ports 261 * (n) - no known usage 262 */ 263 #ifdef _SYS_SOCKETVAR_H_ 264 struct xinpcb { 265 ksize_t xi_len; /* length of this structure */ 266 struct xsocket xi_socket; /* (s,p) */ 267 struct in_conninfo inp_inc; /* (s,p) */ 268 uint64_t inp_gencnt; /* (s,p) */ 269 kvaddr_t inp_ppcb; /* (s) netstat(1) */ 270 int64_t inp_spare64[4]; 271 uint32_t inp_flow; /* (s) */ 272 uint32_t inp_flowid; /* (s) */ 273 uint32_t inp_flowtype; /* (s) */ 274 int32_t inp_flags; /* (s,p) */ 275 int32_t inp_flags2; /* (s) */ 276 uint32_t inp_unused; 277 int32_t in6p_cksum; /* (n) */ 278 int32_t inp_spare32[4]; 279 uint16_t in6p_hops; /* (n) */ 280 uint8_t inp_ip_tos; /* (n) */ 281 int8_t pad8; 282 uint8_t inp_vflag; /* (s,p) */ 283 uint8_t inp_ip_ttl; /* (n) */ 284 uint8_t inp_ip_p; /* (n) */ 285 uint8_t inp_ip_minttl; /* (n) */ 286 int8_t inp_spare8[4]; 287 } __aligned(8); 288 289 struct xinpgen { 290 ksize_t xig_len; /* length of this structure */ 291 u_int xig_count; /* number of PCBs at this time */ 292 uint32_t _xig_spare32; 293 inp_gen_t xig_gen; /* generation count at this time */ 294 so_gen_t xig_sogen; /* socket generation count this time */ 295 uint64_t _xig_spare64[4]; 296 } __aligned(8); 297 298 struct sockopt_parameters { 299 struct in_conninfo sop_inc; 300 uint64_t sop_id; 301 int sop_level; 302 int sop_optname; 303 char sop_optval[]; 304 }; 305 306 #ifdef _KERNEL 307 int sysctl_setsockopt(SYSCTL_HANDLER_ARGS, struct inpcbinfo *pcbinfo, 308 int (*ctloutput_set)(struct inpcb *, struct sockopt *)); 309 void in_pcbtoxinpcb(const struct inpcb *, struct xinpcb *); 310 #endif 311 #endif /* _SYS_SOCKETVAR_H_ */ 312 313 #ifdef _KERNEL 314 /* 315 * Per-VNET pcb database for each high-level protocol (UDP, TCP, ...) in both 316 * IPv4 and IPv6. 317 * 318 * The pcbs are protected with SMR section and thus all lists in inpcbinfo 319 * are CK-lists. Locking is required to insert a pcb into database. Two 320 * locks are provided: one for the hash and one for the global list of pcbs, 321 * as well as overall count and generation count. 322 * 323 * Locking key: 324 * 325 * (c) Constant or nearly constant after initialisation 326 * (e) Protected by SMR section 327 * (g) Locked by ipi_lock 328 * (h) Locked by ipi_hash_lock 329 */ 330 struct inpcbinfo { 331 /* 332 * Global lock protecting inpcb list modification 333 */ 334 struct mtx ipi_lock; 335 struct inpcbhead ipi_listhead; /* (r:e/w:g) */ 336 u_int ipi_count; /* (g) */ 337 338 /* 339 * Generation count -- incremented each time a connection is allocated 340 * or freed. 341 */ 342 u_quad_t ipi_gencnt; /* (g) */ 343 344 /* 345 * Fields associated with port lookup and allocation. 346 */ 347 u_short ipi_lastport; /* (h) */ 348 u_short ipi_lastlow; /* (h) */ 349 u_short ipi_lasthi; /* (h) */ 350 351 /* 352 * UMA zone from which inpcbs are allocated for this protocol. 353 */ 354 uma_zone_t ipi_zone; /* (c) */ 355 uma_zone_t ipi_portzone; /* (c) */ 356 smr_t ipi_smr; /* (c) */ 357 358 /* 359 * Global hash of inpcbs, hashed by local and foreign addresses and 360 * port numbers. The "exact" hash holds PCBs connected to a foreign 361 * address, and "wild" holds the rest. 362 */ 363 struct mtx ipi_hash_lock; 364 struct inpcbhead *ipi_hash_exact; /* (r:e/w:h) */ 365 struct inpcbhead *ipi_hash_wild; /* (r:e/w:h) */ 366 u_long ipi_hashmask; /* (c) */ 367 368 /* 369 * Global hash of inpcbs, hashed by only local port number. 370 */ 371 struct inpcbporthead *ipi_porthashbase; /* (h) */ 372 u_long ipi_porthashmask; /* (h) */ 373 374 /* 375 * Load balance groups used for the SO_REUSEPORT_LB option, 376 * hashed by local port. 377 */ 378 struct inpcblbgrouphead *ipi_lbgrouphashbase; /* (r:e/w:h) */ 379 u_long ipi_lbgrouphashmask; /* (h) */ 380 381 /* 382 * Pointer to network stack instance 383 */ 384 struct vnet *ipi_vnet; /* (c) */ 385 }; 386 387 /* 388 * Global allocation storage for each high-level protocol (UDP, TCP, ...). 389 * Each corresponding per-VNET inpcbinfo points into this one. 390 */ 391 struct inpcbstorage { 392 uma_zone_t ips_zone; 393 uma_zone_t ips_portzone; 394 uma_init ips_pcbinit; 395 size_t ips_size; 396 const char * ips_zone_name; 397 const char * ips_portzone_name; 398 const char * ips_infolock_name; 399 const char * ips_hashlock_name; 400 }; 401 402 #define INPCBSTORAGE_DEFINE(prot, ppcb, lname, zname, iname, hname) \ 403 static int \ 404 prot##_inpcb_init(void *mem, int size __unused, int flags __unused) \ 405 { \ 406 struct inpcb *inp = mem; \ 407 \ 408 rw_init_flags(&inp->inp_lock, lname, RW_RECURSE | RW_DUPOK); \ 409 return (0); \ 410 } \ 411 static struct inpcbstorage prot = { \ 412 .ips_size = sizeof(struct ppcb), \ 413 .ips_pcbinit = prot##_inpcb_init, \ 414 .ips_zone_name = zname, \ 415 .ips_portzone_name = zname " ports", \ 416 .ips_infolock_name = iname, \ 417 .ips_hashlock_name = hname, \ 418 }; \ 419 SYSINIT(prot##_inpcbstorage_init, SI_SUB_PROTO_DOMAIN, \ 420 SI_ORDER_SECOND, in_pcbstorage_init, &prot); \ 421 SYSUNINIT(prot##_inpcbstorage_uninit, SI_SUB_PROTO_DOMAIN, \ 422 SI_ORDER_SECOND, in_pcbstorage_destroy, &prot) 423 424 /* 425 * Load balance groups used for the SO_REUSEPORT_LB socket option. Each group 426 * (or unique address:port combination) can be re-used at most 427 * INPCBLBGROUP_SIZMAX (256) times. The inpcbs are stored in il_inp which 428 * is dynamically resized as processes bind/unbind to that specific group. 429 */ 430 struct inpcblbgroup { 431 CK_LIST_ENTRY(inpcblbgroup) il_list; 432 struct epoch_context il_epoch_ctx; 433 struct ucred *il_cred; 434 uint16_t il_lport; /* (c) */ 435 u_char il_vflag; /* (c) */ 436 uint8_t il_numa_domain; 437 uint32_t il_pad2; 438 union in_dependaddr il_dependladdr; /* (c) */ 439 #define il_laddr il_dependladdr.id46_addr.ia46_addr4 440 #define il6_laddr il_dependladdr.id6_addr 441 uint32_t il_inpsiz; /* max count in il_inp[] (h) */ 442 uint32_t il_inpcnt; /* cur count in il_inp[] (h) */ 443 struct inpcb *il_inp[]; /* (h) */ 444 }; 445 446 #define INP_LOCK_DESTROY(inp) rw_destroy(&(inp)->inp_lock) 447 #define INP_RLOCK(inp) rw_rlock(&(inp)->inp_lock) 448 #define INP_WLOCK(inp) rw_wlock(&(inp)->inp_lock) 449 #define INP_TRY_RLOCK(inp) rw_try_rlock(&(inp)->inp_lock) 450 #define INP_TRY_WLOCK(inp) rw_try_wlock(&(inp)->inp_lock) 451 #define INP_RUNLOCK(inp) rw_runlock(&(inp)->inp_lock) 452 #define INP_WUNLOCK(inp) rw_wunlock(&(inp)->inp_lock) 453 #define INP_UNLOCK(inp) rw_unlock(&(inp)->inp_lock) 454 #define INP_TRY_UPGRADE(inp) rw_try_upgrade(&(inp)->inp_lock) 455 #define INP_DOWNGRADE(inp) rw_downgrade(&(inp)->inp_lock) 456 #define INP_WLOCKED(inp) rw_wowned(&(inp)->inp_lock) 457 #define INP_LOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_LOCKED) 458 #define INP_RLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_RLOCKED) 459 #define INP_WLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_WLOCKED) 460 #define INP_UNLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_UNLOCKED) 461 462 /* 463 * These locking functions are for inpcb consumers outside of sys/netinet, 464 * more specifically, they were added for the benefit of TOE drivers. The 465 * macros are reserved for use by the stack. 466 */ 467 void inp_wlock(struct inpcb *); 468 void inp_wunlock(struct inpcb *); 469 void inp_rlock(struct inpcb *); 470 void inp_runlock(struct inpcb *); 471 472 #ifdef INVARIANT_SUPPORT 473 void inp_lock_assert(struct inpcb *); 474 void inp_unlock_assert(struct inpcb *); 475 #else 476 #define inp_lock_assert(inp) do {} while (0) 477 #define inp_unlock_assert(inp) do {} while (0) 478 #endif 479 480 void inp_apply_all(struct inpcbinfo *, void (*func)(struct inpcb *, void *), 481 void *arg); 482 int inp_ip_tos_get(const struct inpcb *inp); 483 void inp_ip_tos_set(struct inpcb *inp, int val); 484 struct socket * 485 inp_inpcbtosocket(struct inpcb *inp); 486 struct tcpcb * 487 inp_inpcbtotcpcb(struct inpcb *inp); 488 void inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp, 489 uint32_t *faddr, uint16_t *fp); 490 491 #endif /* _KERNEL */ 492 493 #define INP_INFO_WLOCK(ipi) mtx_lock(&(ipi)->ipi_lock) 494 #define INP_INFO_WLOCKED(ipi) mtx_owned(&(ipi)->ipi_lock) 495 #define INP_INFO_WUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_lock) 496 #define INP_INFO_LOCK_ASSERT(ipi) MPASS(SMR_ENTERED((ipi)->ipi_smr) || \ 497 mtx_owned(&(ipi)->ipi_lock)) 498 #define INP_INFO_WLOCK_ASSERT(ipi) mtx_assert(&(ipi)->ipi_lock, MA_OWNED) 499 #define INP_INFO_WUNLOCK_ASSERT(ipi) \ 500 mtx_assert(&(ipi)->ipi_lock, MA_NOTOWNED) 501 502 #define INP_HASH_WLOCK(ipi) mtx_lock(&(ipi)->ipi_hash_lock) 503 #define INP_HASH_WUNLOCK(ipi) mtx_unlock(&(ipi)->ipi_hash_lock) 504 #define INP_HASH_LOCK_ASSERT(ipi) MPASS(SMR_ENTERED((ipi)->ipi_smr) || \ 505 mtx_owned(&(ipi)->ipi_hash_lock)) 506 #define INP_HASH_WLOCK_ASSERT(ipi) mtx_assert(&(ipi)->ipi_hash_lock, \ 507 MA_OWNED) 508 509 /* 510 * Wildcard matching hash is not just a microoptimisation! The hash for 511 * wildcard IPv4 and wildcard IPv6 must be the same, otherwise AF_INET6 512 * wildcard bound pcb won't be able to receive AF_INET connections, while: 513 * jenkins_hash(&zeroes, 1, s) != jenkins_hash(&zeroes, 4, s) 514 * See also comment above struct in_addr_4in6. 515 */ 516 #define IN_ADDR_JHASH32(addr) \ 517 ((addr)->s_addr == INADDR_ANY ? V_in_pcbhashseed : \ 518 jenkins_hash32((&(addr)->s_addr), 1, V_in_pcbhashseed)) 519 #define IN6_ADDR_JHASH32(addr) \ 520 (memcmp((addr), &in6addr_any, sizeof(in6addr_any)) == 0 ? \ 521 V_in_pcbhashseed : \ 522 jenkins_hash32((addr)->__u6_addr.__u6_addr32, \ 523 nitems((addr)->__u6_addr.__u6_addr32), V_in_pcbhashseed)) 524 525 #define INP_PCBHASH(faddr, lport, fport, mask) \ 526 ((IN_ADDR_JHASH32(faddr) ^ ntohs((lport) ^ (fport))) & (mask)) 527 #define INP6_PCBHASH(faddr, lport, fport, mask) \ 528 ((IN6_ADDR_JHASH32(faddr) ^ ntohs((lport) ^ (fport))) & (mask)) 529 530 #define INP_PCBHASH_WILD(lport, mask) \ 531 ((V_in_pcbhashseed ^ ntohs(lport)) & (mask)) 532 533 #define INP_PCBLBGROUP_PKTHASH(faddr, lport, fport) \ 534 (IN_ADDR_JHASH32(faddr) ^ ntohs((lport) ^ (fport))) 535 #define INP6_PCBLBGROUP_PKTHASH(faddr, lport, fport) \ 536 (IN6_ADDR_JHASH32(faddr) ^ ntohs((lport) ^ (fport))) 537 538 #define INP_PCBPORTHASH(lport, mask) (ntohs((lport)) & (mask)) 539 540 /* 541 * Flags for inp_vflags -- historically version flags only 542 */ 543 #define INP_IPV4 0x1 544 #define INP_IPV6 0x2 545 #define INP_IPV6PROTO 0x4 /* opened under IPv6 protocol */ 546 547 /* 548 * Flags for inp_flags. 549 */ 550 #define INP_RECVOPTS 0x00000001 /* receive incoming IP options */ 551 #define INP_RECVRETOPTS 0x00000002 /* receive IP options for reply */ 552 #define INP_RECVDSTADDR 0x00000004 /* receive IP dst address */ 553 #define INP_HDRINCL 0x00000008 /* user supplies entire IP header */ 554 #define INP_HIGHPORT 0x00000010 /* user wants "high" port binding */ 555 #define INP_LOWPORT 0x00000020 /* user wants "low" port binding */ 556 #define INP_ANONPORT 0x00000040 /* read by netstat(1) */ 557 #define INP_RECVIF 0x00000080 /* receive incoming interface */ 558 #define INP_MTUDISC 0x00000100 /* user can do MTU discovery */ 559 /* INP_FREED 0x00000200 private to in_pcb.c */ 560 #define INP_RECVTTL 0x00000400 /* receive incoming IP TTL */ 561 #define INP_DONTFRAG 0x00000800 /* don't fragment packet */ 562 #define INP_BINDANY 0x00001000 /* allow bind to any address */ 563 #define INP_INHASHLIST 0x00002000 /* in_pcbinshash() has been called */ 564 #define INP_RECVTOS 0x00004000 /* receive incoming IP TOS */ 565 #define IN6P_IPV6_V6ONLY 0x00008000 /* restrict AF_INET6 socket for v6 */ 566 #define IN6P_PKTINFO 0x00010000 /* receive IP6 dst and I/F */ 567 #define IN6P_HOPLIMIT 0x00020000 /* receive hoplimit */ 568 #define IN6P_HOPOPTS 0x00040000 /* receive hop-by-hop options */ 569 #define IN6P_DSTOPTS 0x00080000 /* receive dst options after rthdr */ 570 #define IN6P_RTHDR 0x00100000 /* receive routing header */ 571 #define IN6P_RTHDRDSTOPTS 0x00200000 /* receive dstoptions before rthdr */ 572 #define IN6P_TCLASS 0x00400000 /* receive traffic class value */ 573 #define IN6P_AUTOFLOWLABEL 0x00800000 /* attach flowlabel automatically */ 574 /* INP_INLBGROUP 0x01000000 private to in_pcb.c */ 575 #define INP_ONESBCAST 0x02000000 /* send all-ones broadcast */ 576 #define INP_DROPPED 0x04000000 /* protocol drop flag */ 577 #define INP_SOCKREF 0x08000000 /* strong socket reference */ 578 #define INP_RESERVED_0 0x10000000 /* reserved field */ 579 #define INP_RESERVED_1 0x20000000 /* reserved field */ 580 #define IN6P_RFC2292 0x40000000 /* used RFC2292 API on the socket */ 581 #define IN6P_MTU 0x80000000 /* receive path MTU */ 582 583 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\ 584 INP_RECVIF|INP_RECVTTL|INP_RECVTOS|\ 585 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\ 586 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\ 587 IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\ 588 IN6P_MTU) 589 590 /* 591 * Flags for inp_flags2. 592 */ 593 /* 0x00000001 */ 594 /* 0x00000002 */ 595 /* 0x00000004 */ 596 /* 0x00000008 */ 597 /* 0x00000010 */ 598 /* 0x00000020 */ 599 /* 0x00000040 */ 600 /* 0x00000080 */ 601 #define INP_RECVFLOWID 0x00000100 /* populate recv datagram with flow info */ 602 #define INP_RECVRSSBUCKETID 0x00000200 /* populate recv datagram with bucket id */ 603 #define INP_RATE_LIMIT_CHANGED 0x00000400 /* rate limit needs attention */ 604 #define INP_ORIGDSTADDR 0x00000800 /* receive IP dst address/port */ 605 /* 0x00001000 */ 606 /* 0x00002000 */ 607 /* 0x00004000 */ 608 /* 0x00008000 */ 609 /* 0x00010000 */ 610 #define INP_2PCP_SET 0x00020000 /* If the Eth PCP should be set explicitly */ 611 #define INP_2PCP_BIT0 0x00040000 /* Eth PCP Bit 0 */ 612 #define INP_2PCP_BIT1 0x00080000 /* Eth PCP Bit 1 */ 613 #define INP_2PCP_BIT2 0x00100000 /* Eth PCP Bit 2 */ 614 #define INP_2PCP_BASE INP_2PCP_BIT0 615 #define INP_2PCP_MASK (INP_2PCP_BIT0 | INP_2PCP_BIT1 | INP_2PCP_BIT2) 616 #define INP_2PCP_SHIFT 18 /* shift PCP field in/out of inp_flags2 */ 617 618 /* 619 * Flags passed to in_pcblookup*(), inp_smr_lock() and inp_next(). 620 */ 621 typedef enum { 622 INPLOOKUP_WILDCARD = 0x00000001, /* Allow wildcard sockets. */ 623 INPLOOKUP_RLOCKPCB = 0x00000002, /* Return inpcb read-locked. */ 624 INPLOOKUP_WLOCKPCB = 0x00000004, /* Return inpcb write-locked. */ 625 } inp_lookup_t; 626 627 #define INPLOOKUP_MASK (INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB | \ 628 INPLOOKUP_WLOCKPCB) 629 #define INPLOOKUP_LOCKMASK (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB) 630 631 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb) 632 633 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family 634 635 #define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af) 636 637 #ifdef _KERNEL 638 VNET_DECLARE(int, ipport_reservedhigh); 639 VNET_DECLARE(int, ipport_reservedlow); 640 VNET_DECLARE(int, ipport_lowfirstauto); 641 VNET_DECLARE(int, ipport_lowlastauto); 642 VNET_DECLARE(int, ipport_firstauto); 643 VNET_DECLARE(int, ipport_lastauto); 644 VNET_DECLARE(int, ipport_hifirstauto); 645 VNET_DECLARE(int, ipport_hilastauto); 646 VNET_DECLARE(int, ipport_randomized); 647 648 #define V_ipport_reservedhigh VNET(ipport_reservedhigh) 649 #define V_ipport_reservedlow VNET(ipport_reservedlow) 650 #define V_ipport_lowfirstauto VNET(ipport_lowfirstauto) 651 #define V_ipport_lowlastauto VNET(ipport_lowlastauto) 652 #define V_ipport_firstauto VNET(ipport_firstauto) 653 #define V_ipport_lastauto VNET(ipport_lastauto) 654 #define V_ipport_hifirstauto VNET(ipport_hifirstauto) 655 #define V_ipport_hilastauto VNET(ipport_hilastauto) 656 #define V_ipport_randomized VNET(ipport_randomized) 657 658 void in_pcbinfo_init(struct inpcbinfo *, struct inpcbstorage *, 659 u_int, u_int); 660 void in_pcbinfo_destroy(struct inpcbinfo *); 661 void in_pcbstorage_init(void *); 662 void in_pcbstorage_destroy(void *); 663 664 void in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *); 665 int in_pcballoc(struct socket *, struct inpcbinfo *); 666 int in_pcbbind(struct inpcb *, struct sockaddr_in *, struct ucred *); 667 int in_pcbbind_setup(struct inpcb *, struct sockaddr_in *, in_addr_t *, 668 u_short *, struct ucred *); 669 int in_pcbconnect(struct inpcb *, struct sockaddr_in *, struct ucred *, 670 bool); 671 int in_pcbconnect_setup(struct inpcb *, struct sockaddr_in *, in_addr_t *, 672 u_short *, in_addr_t *, u_short *, struct ucred *); 673 void in_pcbdetach(struct inpcb *); 674 void in_pcbdisconnect(struct inpcb *); 675 void in_pcbdrop(struct inpcb *); 676 void in_pcbfree(struct inpcb *); 677 int in_pcbinshash(struct inpcb *); 678 int in_pcbladdr(struct inpcb *, struct in_addr *, struct in_addr *, 679 struct ucred *); 680 int in_pcblbgroup_numa(struct inpcb *, int arg); 681 struct inpcb * 682 in_pcblookup(struct inpcbinfo *, struct in_addr, u_int, 683 struct in_addr, u_int, int, struct ifnet *); 684 struct inpcb * 685 in_pcblookup_mbuf(struct inpcbinfo *, struct in_addr, u_int, 686 struct in_addr, u_int, int, struct ifnet *, struct mbuf *); 687 void in_pcbref(struct inpcb *); 688 void in_pcbrehash(struct inpcb *); 689 void in_pcbremhash_locked(struct inpcb *); 690 bool in_pcbrele(struct inpcb *, inp_lookup_t); 691 bool in_pcbrele_rlocked(struct inpcb *); 692 bool in_pcbrele_wlocked(struct inpcb *); 693 694 typedef bool inp_match_t(const struct inpcb *, void *); 695 struct inpcb_iterator { 696 const struct inpcbinfo *ipi; 697 struct inpcb *inp; 698 inp_match_t *match; 699 void *ctx; 700 int hash; 701 #define INP_ALL_LIST -1 702 const inp_lookup_t lock; 703 }; 704 705 /* Note: sparse initializers guarantee .inp = NULL. */ 706 #define INP_ITERATOR(_ipi, _lock, _match, _ctx) \ 707 { \ 708 .ipi = (_ipi), \ 709 .lock = (_lock), \ 710 .hash = INP_ALL_LIST, \ 711 .match = (_match), \ 712 .ctx = (_ctx), \ 713 } 714 #define INP_ALL_ITERATOR(_ipi, _lock) \ 715 { \ 716 .ipi = (_ipi), \ 717 .lock = (_lock), \ 718 .hash = INP_ALL_LIST, \ 719 } 720 721 struct inpcb *inp_next(struct inpcb_iterator *); 722 void in_losing(struct inpcb *); 723 void in_pcbsetsolabel(struct socket *so); 724 int in_getpeeraddr(struct socket *, struct sockaddr *sa); 725 int in_getsockaddr(struct socket *, struct sockaddr *sa); 726 void in_pcbsosetlabel(struct socket *so); 727 #ifdef RATELIMIT 728 int 729 in_pcboutput_txrtlmt_locked(struct inpcb *, struct ifnet *, 730 struct mbuf *, uint32_t); 731 int in_pcbattach_txrtlmt(struct inpcb *, struct ifnet *, uint32_t, uint32_t, 732 uint32_t, struct m_snd_tag **); 733 void in_pcbdetach_txrtlmt(struct inpcb *); 734 void in_pcbdetach_tag(struct m_snd_tag *); 735 int in_pcbmodify_txrtlmt(struct inpcb *, uint32_t); 736 int in_pcbquery_txrtlmt(struct inpcb *, uint32_t *); 737 int in_pcbquery_txrlevel(struct inpcb *, uint32_t *); 738 void in_pcboutput_txrtlmt(struct inpcb *, struct ifnet *, struct mbuf *); 739 void in_pcboutput_eagain(struct inpcb *); 740 #endif 741 #endif /* _KERNEL */ 742 743 #endif /* !_NETINET_IN_PCB_H_ */ 744