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 * @(#)in_pcb.h 8.1 (Berkeley) 6/10/93 37 * $FreeBSD$ 38 */ 39 40 #ifndef _NETINET_IN_PCB_H_ 41 #define _NETINET_IN_PCB_H_ 42 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> 49 50 #ifdef _KERNEL 51 #include <sys/lock.h> 52 #include <sys/rwlock.h> 53 #include <net/vnet.h> 54 #include <vm/uma.h> 55 #endif 56 57 #define in6pcb inpcb /* for KAME src sync over BSD*'s */ 58 #define in6p_sp inp_sp /* for KAME src sync over BSD*'s */ 59 60 /* 61 * struct inpcb is the common protocol control block structure used in most 62 * IP transport protocols. 63 * 64 * Pointers to local and foreign host table entries, local and foreign socket 65 * numbers, and pointers up (to a socket structure) and down (to a 66 * protocol-specific control block) are stored here. 67 */ 68 LIST_HEAD(inpcbhead, inpcb); 69 LIST_HEAD(inpcbporthead, inpcbport); 70 typedef uint64_t inp_gen_t; 71 72 /* 73 * PCB with AF_INET6 null bind'ed laddr can receive AF_INET input packet. 74 * So, AF_INET6 null laddr is also used as AF_INET null laddr, by utilizing 75 * the following structure. 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 122 123 #define inc_isipv6 inc_flags /* temp compatibility */ 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. A 138 * few fields are protected by multiple locks as indicated in the locking notes 139 * below. For these fields, all of the listed locks must be write-locked for 140 * any modifications. However, these fields can be safely read while any one of 141 * the listed locks are read-locked. This model can permit greater concurrency 142 * for read operations. For example, connections can be looked up while only 143 * holding a read lock on the global pcblist lock. This is important for 144 * performance when attempting to find the connection for a packet given its IP 145 * and port tuple. 146 * 147 * One noteworthy exception is that the global pcbinfo lock follows a different 148 * set of rules in relation to the inp_list field. Rather than being 149 * write-locked for modifications and read-locked for list iterations, it must 150 * be read-locked during modifications and write-locked during list iterations. 151 * This ensures that the relatively rare global list iterations safely walk a 152 * stable snapshot of connections while allowing more common list modifications 153 * to safely grab the pcblist lock just while adding or removing a connection 154 * from the global list. 155 * 156 * Key: 157 * (b) - Protected by the hpts lock. 158 * (c) - Constant after initialization 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 166 * 167 * Notes on the tcp_hpts: 168 * 169 * First Hpts lock order is 170 * 1) INP_WLOCK() 171 * 2) HPTS_LOCK() i.e. hpts->pmtx 172 * 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. 185 * 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(). 191 * 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). 202 * 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 210 * routine. 211 * 212 * A few other notes: 213 * 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. 216 * 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. 221 * 222 * The inp_vflag field is overloaded, and would otherwise ideally be (c). 223 * 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). 227 */ 228 struct icmp6_filter; 229 struct inpcbpolicy; 230 struct m_snd_tag; 231 struct inpcb { 232 /* Cache line #1 (amd64) */ 233 LIST_ENTRY(inpcb) inp_hash; /* (h/i) hash list */ 234 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) */ 241 242 uint32_t inp_hpts_request; /* Current hpts request, zero if 243 * fits in the pacing window (i&b). */ 244 /* 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. 252 */ 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) */ 256 #else 257 volatile uint32_t inp_in_hpts; /* on output hpts (lock b) */ 258 volatile uint32_t inp_in_input; /* on input hpts (lock b) */ 259 #endif 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 */ 269 inp_spare_bits2 : 4; 270 uint8_t inp_spare_byte; /* Compiler hole */ 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 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 */ 289 290 /* Local and foreign ports, local and foreign addr. */ 291 struct in_conninfo inp_inc; /* (i) list for PCB's local port */ 292 293 /* MAC and IPSEC policy information. */ 294 struct label *inp_label; /* (i) MAC label */ 295 struct inpcbpolicy *inp_sp; /* (s) for IPSEC */ 296 297 /* Protocol-dependent part; options. */ 298 struct { 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 */ 302 }; 303 struct { 304 /* (i) IP 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 */ 313 int in6p_cksum; 314 short in6p_hops; 315 }; 316 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 struct llentry *inp_lle; /* cached L2 information */ 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; 324 }; 325 LIST_ENTRY(inpcb) inp_list; /* (p/l) list for all PCBs for proto */ 326 /* (p[w]) for list iteration */ 327 /* (p[r]/l) for addition/removal */ 328 }; 329 #endif /* _KERNEL */ 330 331 #define inp_fport inp_inc.inc_fport 332 #define inp_lport inp_inc.inc_lport 333 #define inp_faddr inp_inc.inc_faddr 334 #define inp_laddr inp_inc.inc_laddr 335 336 #define in6p_faddr inp_inc.inc6_faddr 337 #define in6p_laddr inp_inc.inc6_laddr 338 #define in6p_zoneid inp_inc.inc6_zoneid 339 #define in6p_flowinfo inp_flow 340 341 #define inp_vnet inp_pcbinfo->ipi_vnet 342 343 /* 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. 348 */ 349 350 /* 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. 355 * 356 * Legend: 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 361 */ 362 #ifdef _SYS_SOCKETVAR_H_ 363 struct xinpcb { 364 size_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 union { 369 void *inp_ppcb; /* (s) netstat(1) */ 370 int64_t ph_ppcb; 371 }; 372 int64_t inp_spare64[4]; 373 uint32_t inp_flow; /* (s) */ 374 uint32_t inp_flowid; /* (s) */ 375 uint32_t inp_flowtype; /* (s) */ 376 int32_t inp_flags; /* (s,p) */ 377 int32_t inp_flags2; /* (s) */ 378 int32_t inp_rss_listen_bucket; /* (n) */ 379 int32_t in6p_cksum; /* (n) */ 380 int32_t inp_spare32[4]; 381 uint16_t in6p_hops; /* (n) */ 382 uint8_t inp_ip_tos; /* (n) */ 383 int8_t pad8; 384 uint8_t inp_vflag; /* (s,p) */ 385 uint8_t inp_ip_ttl; /* (n) */ 386 uint8_t inp_ip_p; /* (n) */ 387 uint8_t inp_ip_minttl; /* (n) */ 388 int8_t inp_spare8[4]; 389 } __aligned(8); 390 391 struct xinpgen { 392 size_t xig_len; /* length of this structure */ 393 u_int xig_count; /* number of PCBs at this time */ 394 inp_gen_t xig_gen; /* generation count at this time */ 395 so_gen_t xig_sogen; /* socket generation count this time */ 396 } __aligned(8); 397 #ifdef _KERNEL 398 void in_pcbtoxinpcb(const struct inpcb *, struct xinpcb *); 399 #endif 400 #endif /* _SYS_SOCKETVAR_H_ */ 401 402 struct inpcbport { 403 LIST_ENTRY(inpcbport) phd_hash; 404 struct inpcbhead phd_pcblist; 405 u_short phd_port; 406 }; 407 408 struct in_pcblist { 409 int il_count; 410 struct epoch_context il_epoch_ctx; 411 struct inpcbinfo *il_pcbinfo; 412 struct inpcb *il_inp_list[0]; 413 }; 414 415 /*- 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. 418 * 419 * Each pcbinfo is protected by three locks: ipi_lock, ipi_hash_lock and 420 * ipi_list_lock: 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 424 * pcb list) 425 * 426 * The lock order is: 427 * 428 * ipi_lock (before) 429 * inpcb locks (before) 430 * ipi_list locks (before) 431 * {ipi_hash_lock, pcbgroup locks} 432 * 433 * Locking key: 434 * 435 * (c) Constant or nearly constant after initialisation 436 * (g) Locked by ipi_lock 437 * (l) Locked by ipi_list_lock 438 * (h) Read using either ipi_hash_lock or inpcb lock; write requires both 439 * (p) Protected by one or more pcbgroup locks 440 * (x) Synchronisation properties poorly defined 441 */ 442 struct inpcbinfo { 443 /* 444 * Global lock protecting full inpcb list traversal 445 */ 446 struct rwlock ipi_lock; 447 448 /* 449 * Global list of inpcbs on the protocol. 450 */ 451 struct inpcbhead *ipi_listhead; /* (g/l) */ 452 u_int ipi_count; /* (l) */ 453 454 /* 455 * Generation count -- incremented each time a connection is allocated 456 * or freed. 457 */ 458 u_quad_t ipi_gencnt; /* (l) */ 459 460 /* 461 * Fields associated with port lookup and allocation. 462 */ 463 u_short ipi_lastport; /* (x) */ 464 u_short ipi_lastlow; /* (x) */ 465 u_short ipi_lasthi; /* (x) */ 466 467 /* 468 * UMA zone from which inpcbs are allocated for this protocol. 469 */ 470 struct uma_zone *ipi_zone; /* (c) */ 471 472 /* 473 * Connection groups associated with this protocol. These fields are 474 * constant, but pcbgroup structures themselves are protected by 475 * per-pcbgroup locks. 476 */ 477 struct inpcbgroup *ipi_pcbgroups; /* (c) */ 478 u_int ipi_npcbgroups; /* (c) */ 479 u_int ipi_hashfields; /* (c) */ 480 481 /* 482 * Global lock protecting non-pcbgroup hash lookup tables. 483 */ 484 struct rwlock ipi_hash_lock; 485 486 /* 487 * Global hash of inpcbs, hashed by local and foreign addresses and 488 * port numbers. 489 */ 490 struct inpcbhead *ipi_hashbase; /* (h) */ 491 u_long ipi_hashmask; /* (h) */ 492 493 /* 494 * Global hash of inpcbs, hashed by only local port number. 495 */ 496 struct inpcbporthead *ipi_porthashbase; /* (h) */ 497 u_long ipi_porthashmask; /* (h) */ 498 499 /* 500 * List of wildcard inpcbs for use with pcbgroups. In the past, was 501 * per-pcbgroup but is now global. All pcbgroup locks must be held 502 * to modify the list, so any is sufficient to read it. 503 */ 504 struct inpcbhead *ipi_wildbase; /* (p) */ 505 u_long ipi_wildmask; /* (p) */ 506 507 /* 508 * Load balance groups used for the SO_REUSEPORT_LB option, 509 * hashed by local port. 510 */ 511 struct inpcblbgrouphead *ipi_lbgrouphashbase; /* (h) */ 512 u_long ipi_lbgrouphashmask; /* (h) */ 513 514 /* 515 * Pointer to network stack instance 516 */ 517 struct vnet *ipi_vnet; /* (c) */ 518 519 /* 520 * general use 2 521 */ 522 void *ipi_pspare[2]; 523 524 /* 525 * Global lock protecting global inpcb list, inpcb count, etc. 526 */ 527 struct rwlock ipi_list_lock; 528 }; 529 530 #ifdef _KERNEL 531 /* 532 * Connection groups hold sets of connections that have similar CPU/thread 533 * affinity. Each connection belongs to exactly one connection group. 534 */ 535 struct inpcbgroup { 536 /* 537 * Per-connection group hash of inpcbs, hashed by local and foreign 538 * addresses and port numbers. 539 */ 540 struct inpcbhead *ipg_hashbase; /* (c) */ 541 u_long ipg_hashmask; /* (c) */ 542 543 /* 544 * Notional affinity of this pcbgroup. 545 */ 546 u_int ipg_cpu; /* (p) */ 547 548 /* 549 * Per-connection group lock, not to be confused with ipi_lock. 550 * Protects the hash table hung off the group, but also the global 551 * wildcard list in inpcbinfo. 552 */ 553 struct mtx ipg_lock; 554 } __aligned(CACHE_LINE_SIZE); 555 556 /* 557 * Load balance groups used for the SO_REUSEPORT_LB socket option. Each group 558 * (or unique address:port combination) can be re-used at most 559 * INPCBLBGROUP_SIZMAX (256) times. The inpcbs are stored in il_inp which 560 * is dynamically resized as processes bind/unbind to that specific group. 561 */ 562 struct inpcblbgroup { 563 LIST_ENTRY(inpcblbgroup) il_list; 564 uint16_t il_lport; /* (c) */ 565 u_char il_vflag; /* (c) */ 566 u_char il_pad; 567 uint32_t il_pad2; 568 union in_dependaddr il_dependladdr; /* (c) */ 569 #define il_laddr il_dependladdr.id46_addr.ia46_addr4 570 #define il6_laddr il_dependladdr.id6_addr 571 uint32_t il_inpsiz; /* max count in il_inp[] (h) */ 572 uint32_t il_inpcnt; /* cur count in il_inp[] (h) */ 573 struct inpcb *il_inp[]; /* (h) */ 574 }; 575 LIST_HEAD(inpcblbgrouphead, inpcblbgroup); 576 577 #define INP_LOCK_INIT(inp, d, t) \ 578 rw_init_flags(&(inp)->inp_lock, (t), RW_RECURSE | RW_DUPOK) 579 #define INP_LOCK_DESTROY(inp) rw_destroy(&(inp)->inp_lock) 580 #define INP_RLOCK(inp) rw_rlock(&(inp)->inp_lock) 581 #define INP_WLOCK(inp) rw_wlock(&(inp)->inp_lock) 582 #define INP_TRY_RLOCK(inp) rw_try_rlock(&(inp)->inp_lock) 583 #define INP_TRY_WLOCK(inp) rw_try_wlock(&(inp)->inp_lock) 584 #define INP_RUNLOCK(inp) rw_runlock(&(inp)->inp_lock) 585 #define INP_WUNLOCK(inp) rw_wunlock(&(inp)->inp_lock) 586 #define INP_TRY_UPGRADE(inp) rw_try_upgrade(&(inp)->inp_lock) 587 #define INP_DOWNGRADE(inp) rw_downgrade(&(inp)->inp_lock) 588 #define INP_WLOCKED(inp) rw_wowned(&(inp)->inp_lock) 589 #define INP_LOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_LOCKED) 590 #define INP_RLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_RLOCKED) 591 #define INP_WLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_WLOCKED) 592 #define INP_UNLOCK_ASSERT(inp) rw_assert(&(inp)->inp_lock, RA_UNLOCKED) 593 594 /* 595 * These locking functions are for inpcb consumers outside of sys/netinet, 596 * more specifically, they were added for the benefit of TOE drivers. The 597 * macros are reserved for use by the stack. 598 */ 599 void inp_wlock(struct inpcb *); 600 void inp_wunlock(struct inpcb *); 601 void inp_rlock(struct inpcb *); 602 void inp_runlock(struct inpcb *); 603 604 #ifdef INVARIANT_SUPPORT 605 void inp_lock_assert(struct inpcb *); 606 void inp_unlock_assert(struct inpcb *); 607 #else 608 #define inp_lock_assert(inp) do {} while (0) 609 #define inp_unlock_assert(inp) do {} while (0) 610 #endif 611 612 void inp_apply_all(void (*func)(struct inpcb *, void *), void *arg); 613 int inp_ip_tos_get(const struct inpcb *inp); 614 void inp_ip_tos_set(struct inpcb *inp, int val); 615 struct socket * 616 inp_inpcbtosocket(struct inpcb *inp); 617 struct tcpcb * 618 inp_inpcbtotcpcb(struct inpcb *inp); 619 void inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp, 620 uint32_t *faddr, uint16_t *fp); 621 int inp_so_options(const struct inpcb *inp); 622 623 #endif /* _KERNEL */ 624 625 #define INP_INFO_LOCK_INIT(ipi, d) \ 626 rw_init_flags(&(ipi)->ipi_lock, (d), RW_RECURSE) 627 #define INP_INFO_LOCK_DESTROY(ipi) rw_destroy(&(ipi)->ipi_lock) 628 #define INP_INFO_RLOCK(ipi) rw_rlock(&(ipi)->ipi_lock) 629 #define INP_INFO_WLOCK(ipi) rw_wlock(&(ipi)->ipi_lock) 630 #define INP_INFO_TRY_RLOCK(ipi) rw_try_rlock(&(ipi)->ipi_lock) 631 #define INP_INFO_TRY_WLOCK(ipi) rw_try_wlock(&(ipi)->ipi_lock) 632 #define INP_INFO_TRY_UPGRADE(ipi) rw_try_upgrade(&(ipi)->ipi_lock) 633 #define INP_INFO_WLOCKED(ipi) rw_wowned(&(ipi)->ipi_lock) 634 #define INP_INFO_RUNLOCK(ipi) rw_runlock(&(ipi)->ipi_lock) 635 #define INP_INFO_WUNLOCK(ipi) rw_wunlock(&(ipi)->ipi_lock) 636 #define INP_INFO_LOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_LOCKED) 637 #define INP_INFO_RLOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_RLOCKED) 638 #define INP_INFO_WLOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_WLOCKED) 639 #define INP_INFO_UNLOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_lock, RA_UNLOCKED) 640 641 #define INP_LIST_LOCK_INIT(ipi, d) \ 642 rw_init_flags(&(ipi)->ipi_list_lock, (d), 0) 643 #define INP_LIST_LOCK_DESTROY(ipi) rw_destroy(&(ipi)->ipi_list_lock) 644 #define INP_LIST_RLOCK(ipi) rw_rlock(&(ipi)->ipi_list_lock) 645 #define INP_LIST_WLOCK(ipi) rw_wlock(&(ipi)->ipi_list_lock) 646 #define INP_LIST_TRY_RLOCK(ipi) rw_try_rlock(&(ipi)->ipi_list_lock) 647 #define INP_LIST_TRY_WLOCK(ipi) rw_try_wlock(&(ipi)->ipi_list_lock) 648 #define INP_LIST_TRY_UPGRADE(ipi) rw_try_upgrade(&(ipi)->ipi_list_lock) 649 #define INP_LIST_RUNLOCK(ipi) rw_runlock(&(ipi)->ipi_list_lock) 650 #define INP_LIST_WUNLOCK(ipi) rw_wunlock(&(ipi)->ipi_list_lock) 651 #define INP_LIST_LOCK_ASSERT(ipi) \ 652 rw_assert(&(ipi)->ipi_list_lock, RA_LOCKED) 653 #define INP_LIST_RLOCK_ASSERT(ipi) \ 654 rw_assert(&(ipi)->ipi_list_lock, RA_RLOCKED) 655 #define INP_LIST_WLOCK_ASSERT(ipi) \ 656 rw_assert(&(ipi)->ipi_list_lock, RA_WLOCKED) 657 #define INP_LIST_UNLOCK_ASSERT(ipi) \ 658 rw_assert(&(ipi)->ipi_list_lock, RA_UNLOCKED) 659 660 #define INP_HASH_LOCK_INIT(ipi, d) \ 661 rw_init_flags(&(ipi)->ipi_hash_lock, (d), 0) 662 #define INP_HASH_LOCK_DESTROY(ipi) rw_destroy(&(ipi)->ipi_hash_lock) 663 #define INP_HASH_RLOCK(ipi) rw_rlock(&(ipi)->ipi_hash_lock) 664 #define INP_HASH_WLOCK(ipi) rw_wlock(&(ipi)->ipi_hash_lock) 665 #define INP_HASH_RUNLOCK(ipi) rw_runlock(&(ipi)->ipi_hash_lock) 666 #define INP_HASH_WUNLOCK(ipi) rw_wunlock(&(ipi)->ipi_hash_lock) 667 #define INP_HASH_LOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_hash_lock, \ 668 RA_LOCKED) 669 #define INP_HASH_WLOCK_ASSERT(ipi) rw_assert(&(ipi)->ipi_hash_lock, \ 670 RA_WLOCKED) 671 672 #define INP_GROUP_LOCK_INIT(ipg, d) mtx_init(&(ipg)->ipg_lock, (d), NULL, \ 673 MTX_DEF | MTX_DUPOK) 674 #define INP_GROUP_LOCK_DESTROY(ipg) mtx_destroy(&(ipg)->ipg_lock) 675 676 #define INP_GROUP_LOCK(ipg) mtx_lock(&(ipg)->ipg_lock) 677 #define INP_GROUP_LOCK_ASSERT(ipg) mtx_assert(&(ipg)->ipg_lock, MA_OWNED) 678 #define INP_GROUP_UNLOCK(ipg) mtx_unlock(&(ipg)->ipg_lock) 679 680 #define INP_PCBHASH(faddr, lport, fport, mask) \ 681 (((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) & (mask)) 682 #define INP_PCBPORTHASH(lport, mask) \ 683 (ntohs((lport)) & (mask)) 684 #define INP_PCBLBGROUP_PORTHASH(lport, mask) \ 685 (ntohs((lport)) & (mask)) 686 #define INP_PCBLBGROUP_PKTHASH(faddr, lport, fport) \ 687 ((faddr) ^ ((faddr) >> 16) ^ ntohs((lport) ^ (fport))) 688 #define INP6_PCBHASHKEY(faddr) ((faddr)->s6_addr32[3]) 689 690 /* 691 * Flags for inp_vflags -- historically version flags only 692 */ 693 #define INP_IPV4 0x1 694 #define INP_IPV6 0x2 695 #define INP_IPV6PROTO 0x4 /* opened under IPv6 protocol */ 696 697 /* 698 * Flags for inp_flags. 699 */ 700 #define INP_RECVOPTS 0x00000001 /* receive incoming IP options */ 701 #define INP_RECVRETOPTS 0x00000002 /* receive IP options for reply */ 702 #define INP_RECVDSTADDR 0x00000004 /* receive IP dst address */ 703 #define INP_HDRINCL 0x00000008 /* user supplies entire IP header */ 704 #define INP_HIGHPORT 0x00000010 /* user wants "high" port binding */ 705 #define INP_LOWPORT 0x00000020 /* user wants "low" port binding */ 706 #define INP_ANONPORT 0x00000040 /* port chosen for user */ 707 #define INP_RECVIF 0x00000080 /* receive incoming interface */ 708 #define INP_MTUDISC 0x00000100 /* user can do MTU discovery */ 709 /* 0x000200 unused: was INP_FAITH */ 710 #define INP_RECVTTL 0x00000400 /* receive incoming IP TTL */ 711 #define INP_DONTFRAG 0x00000800 /* don't fragment packet */ 712 #define INP_BINDANY 0x00001000 /* allow bind to any address */ 713 #define INP_INHASHLIST 0x00002000 /* in_pcbinshash() has been called */ 714 #define INP_RECVTOS 0x00004000 /* receive incoming IP TOS */ 715 #define IN6P_IPV6_V6ONLY 0x00008000 /* restrict AF_INET6 socket for v6 */ 716 #define IN6P_PKTINFO 0x00010000 /* receive IP6 dst and I/F */ 717 #define IN6P_HOPLIMIT 0x00020000 /* receive hoplimit */ 718 #define IN6P_HOPOPTS 0x00040000 /* receive hop-by-hop options */ 719 #define IN6P_DSTOPTS 0x00080000 /* receive dst options after rthdr */ 720 #define IN6P_RTHDR 0x00100000 /* receive routing header */ 721 #define IN6P_RTHDRDSTOPTS 0x00200000 /* receive dstoptions before rthdr */ 722 #define IN6P_TCLASS 0x00400000 /* receive traffic class value */ 723 #define IN6P_AUTOFLOWLABEL 0x00800000 /* attach flowlabel automatically */ 724 #define INP_TIMEWAIT 0x01000000 /* in TIMEWAIT, ppcb is tcptw */ 725 #define INP_ONESBCAST 0x02000000 /* send all-ones broadcast */ 726 #define INP_DROPPED 0x04000000 /* protocol drop flag */ 727 #define INP_SOCKREF 0x08000000 /* strong socket reference */ 728 #define INP_RESERVED_0 0x10000000 /* reserved field */ 729 #define INP_RESERVED_1 0x20000000 /* reserved field */ 730 #define IN6P_RFC2292 0x40000000 /* used RFC2292 API on the socket */ 731 #define IN6P_MTU 0x80000000 /* receive path MTU */ 732 733 #define INP_CONTROLOPTS (INP_RECVOPTS|INP_RECVRETOPTS|INP_RECVDSTADDR|\ 734 INP_RECVIF|INP_RECVTTL|INP_RECVTOS|\ 735 IN6P_PKTINFO|IN6P_HOPLIMIT|IN6P_HOPOPTS|\ 736 IN6P_DSTOPTS|IN6P_RTHDR|IN6P_RTHDRDSTOPTS|\ 737 IN6P_TCLASS|IN6P_AUTOFLOWLABEL|IN6P_RFC2292|\ 738 IN6P_MTU) 739 740 /* 741 * Flags for inp_flags2. 742 */ 743 #define INP_LLE_VALID 0x00000001 /* cached lle is valid */ 744 #define INP_RT_VALID 0x00000002 /* cached rtentry is valid */ 745 #define INP_PCBGROUPWILD 0x00000004 /* in pcbgroup wildcard list */ 746 #define INP_REUSEPORT 0x00000008 /* SO_REUSEPORT option is set */ 747 #define INP_FREED 0x00000010 /* inp itself is not valid */ 748 #define INP_REUSEADDR 0x00000020 /* SO_REUSEADDR option is set */ 749 #define INP_BINDMULTI 0x00000040 /* IP_BINDMULTI option is set */ 750 #define INP_RSS_BUCKET_SET 0x00000080 /* IP_RSS_LISTEN_BUCKET is set */ 751 #define INP_RECVFLOWID 0x00000100 /* populate recv datagram with flow info */ 752 #define INP_RECVRSSBUCKETID 0x00000200 /* populate recv datagram with bucket id */ 753 #define INP_RATE_LIMIT_CHANGED 0x00000400 /* rate limit needs attention */ 754 #define INP_ORIGDSTADDR 0x00000800 /* receive IP dst address/port */ 755 #define INP_CANNOT_DO_ECN 0x00001000 /* The stack does not do ECN */ 756 #define INP_REUSEPORT_LB 0x00002000 /* SO_REUSEPORT_LB option is set */ 757 758 /* 759 * Flags passed to in_pcblookup*() functions. 760 */ 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. */ 764 765 #define INPLOOKUP_MASK (INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB | \ 766 INPLOOKUP_WLOCKPCB) 767 768 #define sotoinpcb(so) ((struct inpcb *)(so)->so_pcb) 769 #define sotoin6pcb(so) sotoinpcb(so) /* for KAME src sync over BSD*'s */ 770 771 #define INP_SOCKAF(so) so->so_proto->pr_domain->dom_family 772 773 #define INP_CHECK_SOCKAF(so, af) (INP_SOCKAF(so) == af) 774 775 /* 776 * Constants for pcbinfo.ipi_hashfields. 777 */ 778 #define IPI_HASHFIELDS_NONE 0 779 #define IPI_HASHFIELDS_2TUPLE 1 780 #define IPI_HASHFIELDS_4TUPLE 2 781 782 #ifdef _KERNEL 783 VNET_DECLARE(int, ipport_reservedhigh); 784 VNET_DECLARE(int, ipport_reservedlow); 785 VNET_DECLARE(int, ipport_lowfirstauto); 786 VNET_DECLARE(int, ipport_lowlastauto); 787 VNET_DECLARE(int, ipport_firstauto); 788 VNET_DECLARE(int, ipport_lastauto); 789 VNET_DECLARE(int, ipport_hifirstauto); 790 VNET_DECLARE(int, ipport_hilastauto); 791 VNET_DECLARE(int, ipport_randomized); 792 VNET_DECLARE(int, ipport_randomcps); 793 VNET_DECLARE(int, ipport_randomtime); 794 VNET_DECLARE(int, ipport_stoprandom); 795 VNET_DECLARE(int, ipport_tcpallocs); 796 797 #define V_ipport_reservedhigh VNET(ipport_reservedhigh) 798 #define V_ipport_reservedlow VNET(ipport_reservedlow) 799 #define V_ipport_lowfirstauto VNET(ipport_lowfirstauto) 800 #define V_ipport_lowlastauto VNET(ipport_lowlastauto) 801 #define V_ipport_firstauto VNET(ipport_firstauto) 802 #define V_ipport_lastauto VNET(ipport_lastauto) 803 #define V_ipport_hifirstauto VNET(ipport_hifirstauto) 804 #define V_ipport_hilastauto VNET(ipport_hilastauto) 805 #define V_ipport_randomized VNET(ipport_randomized) 806 #define V_ipport_randomcps VNET(ipport_randomcps) 807 #define V_ipport_randomtime VNET(ipport_randomtime) 808 #define V_ipport_stoprandom VNET(ipport_stoprandom) 809 #define V_ipport_tcpallocs VNET(ipport_tcpallocs) 810 811 void in_pcbinfo_destroy(struct inpcbinfo *); 812 void in_pcbinfo_init(struct inpcbinfo *, const char *, struct inpcbhead *, 813 int, int, char *, uma_init, u_int); 814 815 int in_pcbbind_check_bindmulti(const struct inpcb *ni, 816 const struct inpcb *oi); 817 818 struct inpcbgroup * 819 in_pcbgroup_byhash(struct inpcbinfo *, u_int, uint32_t); 820 struct inpcbgroup * 821 in_pcbgroup_byinpcb(struct inpcb *); 822 struct inpcbgroup * 823 in_pcbgroup_bytuple(struct inpcbinfo *, struct in_addr, u_short, 824 struct in_addr, u_short); 825 void in_pcbgroup_destroy(struct inpcbinfo *); 826 int in_pcbgroup_enabled(struct inpcbinfo *); 827 void in_pcbgroup_init(struct inpcbinfo *, u_int, int); 828 void in_pcbgroup_remove(struct inpcb *); 829 void in_pcbgroup_update(struct inpcb *); 830 void in_pcbgroup_update_mbuf(struct inpcb *, struct mbuf *); 831 832 void in_pcbpurgeif0(struct inpcbinfo *, struct ifnet *); 833 int in_pcballoc(struct socket *, struct inpcbinfo *); 834 int in_pcbbind(struct inpcb *, struct sockaddr *, struct ucred *); 835 int in_pcb_lport(struct inpcb *, struct in_addr *, u_short *, 836 struct ucred *, int); 837 int in_pcbbind_setup(struct inpcb *, struct sockaddr *, in_addr_t *, 838 u_short *, struct ucred *); 839 int in_pcbconnect(struct inpcb *, struct sockaddr *, struct ucred *); 840 int in_pcbconnect_mbuf(struct inpcb *, struct sockaddr *, struct ucred *, 841 struct mbuf *); 842 int in_pcbconnect_setup(struct inpcb *, struct sockaddr *, in_addr_t *, 843 u_short *, in_addr_t *, u_short *, struct inpcb **, 844 struct ucred *); 845 void in_pcbdetach(struct inpcb *); 846 void in_pcbdisconnect(struct inpcb *); 847 void in_pcbdrop(struct inpcb *); 848 void in_pcbfree(struct inpcb *); 849 int in_pcbinshash(struct inpcb *); 850 int in_pcbinshash_nopcbgroup(struct inpcb *); 851 int in_pcbladdr(struct inpcb *, struct in_addr *, struct in_addr *, 852 struct ucred *); 853 struct inpcb * 854 in_pcblookup_local(struct inpcbinfo *, 855 struct in_addr, u_short, int, struct ucred *); 856 struct inpcb * 857 in_pcblookup(struct inpcbinfo *, struct in_addr, u_int, 858 struct in_addr, u_int, int, struct ifnet *); 859 struct inpcb * 860 in_pcblookup_mbuf(struct inpcbinfo *, struct in_addr, u_int, 861 struct in_addr, u_int, int, struct ifnet *, struct mbuf *); 862 void in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr, 863 int, struct inpcb *(*)(struct inpcb *, int)); 864 void in_pcbref(struct inpcb *); 865 void in_pcbrehash(struct inpcb *); 866 void in_pcbrehash_mbuf(struct inpcb *, struct mbuf *); 867 int in_pcbrele(struct inpcb *); 868 int in_pcbrele_rlocked(struct inpcb *); 869 int in_pcbrele_wlocked(struct inpcb *); 870 void in_pcblist_rele_rlocked(epoch_context_t ctx); 871 void in_losing(struct inpcb *); 872 void in_pcbsetsolabel(struct socket *so); 873 int in_getpeeraddr(struct socket *so, struct sockaddr **nam); 874 int in_getsockaddr(struct socket *so, struct sockaddr **nam); 875 struct sockaddr * 876 in_sockaddr(in_port_t port, struct in_addr *addr); 877 void in_pcbsosetlabel(struct socket *so); 878 #ifdef RATELIMIT 879 int in_pcbattach_txrtlmt(struct inpcb *, struct ifnet *, uint32_t, uint32_t, uint32_t); 880 void in_pcbdetach_txrtlmt(struct inpcb *); 881 int in_pcbmodify_txrtlmt(struct inpcb *, uint32_t); 882 int in_pcbquery_txrtlmt(struct inpcb *, uint32_t *); 883 int in_pcbquery_txrlevel(struct inpcb *, uint32_t *); 884 void in_pcboutput_txrtlmt(struct inpcb *, struct ifnet *, struct mbuf *); 885 void in_pcboutput_eagain(struct inpcb *); 886 #endif 887 #endif /* _KERNEL */ 888 889 #endif /* !_NETINET_IN_PCB_H_ */ 890