in_proto.c revision 1.126.2.3
1 /* $NetBSD: in_proto.c,v 1.126.2.3 2018/09/06 06:56:44 pgoyette Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: in_proto.c,v 1.126.2.3 2018/09/06 06:56:44 pgoyette Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_mrouting.h" 68 #include "opt_inet.h" 69 #include "opt_ipsec.h" 70 #include "opt_pim.h" 71 #include "opt_gateway.h" 72 #include "opt_dccp.h" 73 #include "opt_sctp.h" 74 #include "opt_compat_netbsd.h" 75 #include "opt_net_mpsafe.h" 76 #endif 77 78 #include <sys/param.h> 79 #include <sys/socket.h> 80 #include <sys/protosw.h> 81 #include <sys/domain.h> 82 #include <sys/mbuf.h> 83 84 #include <net/if.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/in_var.h> 89 #include <netinet/ip.h> 90 #include <netinet/ip_var.h> 91 #include <netinet/ip_icmp.h> 92 #include <netinet/in_ifattach.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/in_proto.h> 95 96 #ifdef INET6 97 #ifndef INET 98 #include <netinet/in.h> 99 #endif 100 #include <netinet/ip6.h> 101 #endif 102 103 #include <netinet/igmp_var.h> 104 #ifdef PIM 105 #include <netinet/pim_var.h> 106 #endif 107 #include <netinet/tcp.h> 108 #include <netinet/tcp_fsm.h> 109 #include <netinet/tcp_seq.h> 110 #include <netinet/tcp_timer.h> 111 #include <netinet/tcp_var.h> 112 #include <netinet/tcp_debug.h> 113 #include <netinet/udp.h> 114 #include <netinet/udp_var.h> 115 #include <netinet/ip_encap.h> 116 117 #ifdef DCCP 118 #include <netinet/dccp.h> 119 #include <netinet/dccp_var.h> 120 #endif 121 122 #ifdef SCTP 123 #include <netinet/sctp.h> 124 #include <netinet/sctp_var.h> 125 #endif 126 127 /* 128 * TCP/IP protocol family: IP, ICMP, UDP, TCP. 129 */ 130 131 #ifdef IPSEC 132 #include <netipsec/ipsec.h> 133 #include <netipsec/key.h> 134 #endif /* IPSEC */ 135 136 #include "carp.h" 137 #if NCARP > 0 138 #include <netinet/ip_carp.h> 139 #endif 140 141 #include "pfsync.h" 142 #if NPFSYNC > 0 143 #include <net/pfvar.h> 144 #include <net/if_pfsync.h> 145 #endif 146 147 DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ 148 149 /* Wrappers to acquire kernel_lock. */ 150 151 PR_WRAP_CTLINPUT(rip_ctlinput) 152 PR_WRAP_CTLINPUT(udp_ctlinput) 153 PR_WRAP_CTLINPUT(tcp_ctlinput) 154 155 #define rip_ctlinput rip_ctlinput_wrapper 156 #define udp_ctlinput udp_ctlinput_wrapper 157 #define tcp_ctlinput tcp_ctlinput_wrapper 158 159 PR_WRAP_CTLOUTPUT(rip_ctloutput) 160 PR_WRAP_CTLOUTPUT(udp_ctloutput) 161 PR_WRAP_CTLOUTPUT(tcp_ctloutput) 162 163 #define rip_ctloutput rip_ctloutput_wrapper 164 #define udp_ctloutput udp_ctloutput_wrapper 165 #define tcp_ctloutput tcp_ctloutput_wrapper 166 167 #ifdef DCCP 168 PR_WRAP_CTLINPUT(dccp_ctlinput) 169 PR_WRAP_CTLOUTPUT(dccp_ctloutput) 170 171 #define dccp_ctlinput dccp_ctlinput_wrapper 172 #define dccp_ctloutput dccp_ctloutput_wrapper 173 #endif 174 175 #ifdef SCTP 176 PR_WRAP_CTLINPUT(sctp_ctlinput) 177 PR_WRAP_CTLOUTPUT(sctp_ctloutput) 178 179 #define sctp_ctlinput sctp_ctlinput_wrapper 180 #define sctp_ctloutput sctp_ctloutput_wrapper 181 #endif 182 183 #ifdef NET_MPSAFE 184 PR_WRAP_INPUT(udp_input) 185 PR_WRAP_INPUT(tcp_input) 186 #ifdef DCCP 187 PR_WRAP_INPUT(dccp_input) 188 #endif 189 #ifdef SCTP 190 PR_WRAP_INPUT(sctp_input) 191 #endif 192 PR_WRAP_INPUT(rip_input) 193 #if NPFSYNC > 0 194 PR_WRAP_INPUT(pfsync_input) 195 #endif 196 PR_WRAP_INPUT(igmp_input) 197 #ifdef PIM 198 PR_WRAP_INPUT(pim_input) 199 #endif 200 201 #define udp_input udp_input_wrapper 202 #define tcp_input tcp_input_wrapper 203 #define dccp_input dccp_input_wrapper 204 #define sctp_input sctp_input_wrapper 205 #define rip_input rip_input_wrapper 206 #define pfsync_input pfsync_input_wrapper 207 #define igmp_input igmp_input_wrapper 208 #define pim_input pim_input_wrapper 209 #endif 210 211 #if defined(IPSEC) 212 213 #ifdef IPSEC_RUMPKERNEL 214 /* 215 * .pr_input = ipsec4_common_input won't be resolved on loading 216 * the ipsec shared library. We need a wrapper anyway. 217 */ 218 static void 219 ipsec4_common_input_wrapper(struct mbuf *m, ...) 220 { 221 222 if (ipsec_enabled) { 223 int off, nxt; 224 va_list args; 225 /* XXX just passing args to ipsec4_common_input doesn't work */ 226 va_start(args, m); 227 off = va_arg(args, int); 228 nxt = va_arg(args, int); 229 va_end(args); 230 ipsec4_common_input(m, off, nxt); 231 } else { 232 m_freem(m); 233 } 234 } 235 #define ipsec4_common_input ipsec4_common_input_wrapper 236 237 /* The ctlinput functions may not be loaded */ 238 #define IPSEC_WRAP_CTLINPUT(name) \ 239 static void * \ 240 name##_wrapper(int a, const struct sockaddr *b, void *c)\ 241 { \ 242 void *rv; \ 243 KERNEL_LOCK(1, NULL); \ 244 if (ipsec_enabled) \ 245 rv = name(a, b, c); \ 246 else \ 247 rv = NULL; \ 248 KERNEL_UNLOCK_ONE(NULL); \ 249 return rv; \ 250 } 251 IPSEC_WRAP_CTLINPUT(ah4_ctlinput) 252 IPSEC_WRAP_CTLINPUT(esp4_ctlinput) 253 254 #else /* !IPSEC_RUMPKERNEL */ 255 256 PR_WRAP_CTLINPUT(ah4_ctlinput) 257 PR_WRAP_CTLINPUT(esp4_ctlinput) 258 259 #endif /* !IPSEC_RUMPKERNEL */ 260 261 #define ah4_ctlinput ah4_ctlinput_wrapper 262 #define esp4_ctlinput esp4_ctlinput_wrapper 263 264 #endif /* IPSEC */ 265 266 const struct protosw inetsw[] = { 267 { .pr_domain = &inetdomain, 268 .pr_init = ip_init, 269 .pr_fasttimo = ip_fasttimo, 270 .pr_slowtimo = ip_slowtimo, 271 .pr_drain = ip_drainstub, 272 }, 273 { .pr_type = SOCK_RAW, 274 .pr_domain = &inetdomain, 275 .pr_protocol = IPPROTO_ICMP, 276 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 277 .pr_input = icmp_input, 278 .pr_ctlinput = rip_ctlinput, 279 .pr_ctloutput = rip_ctloutput, 280 .pr_usrreqs = &rip_usrreqs, 281 .pr_init = icmp_init, 282 }, 283 { .pr_type = SOCK_DGRAM, 284 .pr_domain = &inetdomain, 285 .pr_protocol = IPPROTO_UDP, 286 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 287 .pr_input = udp_input, 288 .pr_ctlinput = udp_ctlinput, 289 .pr_ctloutput = udp_ctloutput, 290 .pr_usrreqs = &udp_usrreqs, 291 .pr_init = udp_init, 292 }, 293 { .pr_type = SOCK_STREAM, 294 .pr_domain = &inetdomain, 295 .pr_protocol = IPPROTO_TCP, 296 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, 297 .pr_input = tcp_input, 298 .pr_ctlinput = tcp_ctlinput, 299 .pr_ctloutput = tcp_ctloutput, 300 .pr_usrreqs = &tcp_usrreqs, 301 .pr_init = tcp_init, 302 .pr_fasttimo = tcp_fasttimo, 303 .pr_drain = tcp_drainstub, 304 }, 305 #ifdef DCCP 306 { .pr_type = SOCK_CONN_DGRAM, 307 .pr_domain = &inetdomain, 308 .pr_protocol = IPPROTO_DCCP, 309 .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_ATOMIC|PR_LISTEN|PR_ABRTACPTDIS, 310 .pr_input = dccp_input, 311 .pr_ctlinput = dccp_ctlinput, 312 .pr_ctloutput = dccp_ctloutput, 313 .pr_usrreqs = &dccp_usrreqs, 314 .pr_init = dccp_init, 315 }, 316 #endif 317 #ifdef SCTP 318 { .pr_type = SOCK_DGRAM, 319 .pr_domain = &inetdomain, 320 .pr_protocol = IPPROTO_SCTP, 321 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 322 .pr_input = sctp_input, 323 .pr_ctlinput = sctp_ctlinput, 324 .pr_ctloutput = sctp_ctloutput, 325 .pr_usrreqs = &sctp_usrreqs, 326 .pr_init = sctp_init, 327 .pr_drain = sctp_drain 328 }, 329 { .pr_type = SOCK_SEQPACKET, 330 .pr_domain = &inetdomain, 331 .pr_protocol = IPPROTO_SCTP, 332 .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, 333 .pr_input = sctp_input, 334 .pr_ctlinput = sctp_ctlinput, 335 .pr_ctloutput = sctp_ctloutput, 336 .pr_usrreqs = &sctp_usrreqs, 337 .pr_drain = sctp_drain 338 }, 339 { .pr_type = SOCK_STREAM, 340 .pr_domain = &inetdomain, 341 .pr_protocol = IPPROTO_SCTP, 342 .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, 343 .pr_input = sctp_input, 344 .pr_ctlinput = sctp_ctlinput, 345 .pr_ctloutput = sctp_ctloutput, 346 .pr_usrreqs = &sctp_usrreqs, 347 .pr_drain = sctp_drain 348 }, 349 #endif /* SCTP */ 350 { .pr_type = SOCK_RAW, 351 .pr_domain = &inetdomain, 352 .pr_protocol = IPPROTO_RAW, 353 .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, 354 .pr_input = rip_input, 355 .pr_ctlinput = rip_ctlinput, 356 .pr_ctloutput = rip_ctloutput, 357 .pr_usrreqs = &rip_usrreqs, 358 }, 359 #ifdef GATEWAY 360 { .pr_domain = &inetdomain, 361 .pr_protocol = IPPROTO_IP, 362 .pr_slowtimo = ipflow_slowtimo, 363 .pr_init = ipflow_poolinit, 364 }, 365 #endif /* GATEWAY */ 366 #ifdef IPSEC 367 { .pr_type = SOCK_RAW, 368 .pr_domain = &inetdomain, 369 .pr_protocol = IPPROTO_AH, 370 .pr_flags = PR_ATOMIC|PR_ADDR, 371 .pr_input = ipsec4_common_input, 372 .pr_ctlinput = ah4_ctlinput, 373 }, 374 { .pr_type = SOCK_RAW, 375 .pr_domain = &inetdomain, 376 .pr_protocol = IPPROTO_ESP, 377 .pr_flags = PR_ATOMIC|PR_ADDR, 378 .pr_input = ipsec4_common_input, 379 .pr_ctlinput = esp4_ctlinput, 380 }, 381 { .pr_type = SOCK_RAW, 382 .pr_domain = &inetdomain, 383 .pr_protocol = IPPROTO_IPCOMP, 384 .pr_flags = PR_ATOMIC|PR_ADDR, 385 .pr_input = ipsec4_common_input, 386 }, 387 #endif /* IPSEC */ 388 { .pr_type = SOCK_RAW, 389 .pr_domain = &inetdomain, 390 .pr_protocol = IPPROTO_IPV4, 391 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 392 .pr_input = encap4_input, 393 .pr_ctlinput = rip_ctlinput, 394 .pr_ctloutput = rip_ctloutput, 395 .pr_usrreqs = &rip_usrreqs, 396 .pr_init = encap_init, 397 }, 398 #ifdef INET6 399 { .pr_type = SOCK_RAW, 400 .pr_domain = &inetdomain, 401 .pr_protocol = IPPROTO_IPV6, 402 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 403 .pr_input = encap4_input, 404 .pr_ctlinput = rip_ctlinput, 405 .pr_ctloutput = rip_ctloutput, 406 .pr_usrreqs = &rip_usrreqs, 407 .pr_init = encap_init, 408 }, 409 #endif /* INET6 */ 410 #if NCARP > 0 411 { .pr_type = SOCK_RAW, 412 .pr_domain = &inetdomain, 413 .pr_protocol = IPPROTO_CARP, 414 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 415 .pr_input = carp_proto_input, 416 .pr_ctloutput = rip_ctloutput, 417 .pr_usrreqs = &rip_usrreqs, 418 .pr_init = carp_init, 419 }, 420 #endif /* NCARP > 0 */ 421 { .pr_type = SOCK_RAW, 422 .pr_domain = &inetdomain, 423 .pr_protocol = IPPROTO_L2TP, 424 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 425 .pr_input = encap4_input, 426 .pr_ctlinput = rip_ctlinput, 427 .pr_ctloutput = rip_ctloutput, 428 .pr_usrreqs = &rip_usrreqs, /*XXX*/ 429 .pr_init = encap_init, 430 }, 431 #if NPFSYNC > 0 432 { .pr_type = SOCK_RAW, 433 .pr_domain = &inetdomain, 434 .pr_protocol = IPPROTO_PFSYNC, 435 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 436 .pr_input = pfsync_input, 437 .pr_ctloutput = rip_ctloutput, 438 .pr_usrreqs = &rip_usrreqs, 439 }, 440 #endif /* NPFSYNC > 0 */ 441 { .pr_type = SOCK_RAW, 442 .pr_domain = &inetdomain, 443 .pr_protocol = IPPROTO_IGMP, 444 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 445 .pr_input = igmp_input, 446 .pr_ctloutput = rip_ctloutput, 447 .pr_ctlinput = rip_ctlinput, 448 .pr_usrreqs = &rip_usrreqs, 449 .pr_fasttimo = igmp_fasttimo, 450 .pr_slowtimo = igmp_slowtimo, 451 .pr_init = igmp_init, 452 }, 453 #ifdef PIM 454 { .pr_type = SOCK_RAW, 455 .pr_domain = &inetdomain, 456 .pr_protocol = IPPROTO_PIM, 457 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 458 .pr_input = pim_input, 459 .pr_ctloutput = rip_ctloutput, 460 .pr_ctlinput = rip_ctlinput, 461 .pr_usrreqs = &rip_usrreqs, 462 }, 463 #endif /* PIM */ 464 /* raw wildcard */ 465 { .pr_type = SOCK_RAW, 466 .pr_domain = &inetdomain, 467 .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, 468 .pr_input = rip_input, 469 .pr_ctloutput = rip_ctloutput, 470 .pr_ctlinput = rip_ctlinput, 471 .pr_usrreqs = &rip_usrreqs, 472 .pr_init = rip_init, 473 }, 474 }; 475 476 const struct sockaddr_in in_any = { 477 .sin_len = sizeof(struct sockaddr_in) 478 , .sin_family = AF_INET 479 , .sin_port = 0 480 , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} 481 }; 482 483 struct domain inetdomain = { 484 .dom_family = PF_INET, .dom_name = "internet", .dom_init = NULL, 485 .dom_externalize = NULL, .dom_dispose = NULL, 486 .dom_protosw = inetsw, 487 .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], 488 .dom_rtattach = rt_inithead, 489 .dom_rtoffset = 32, 490 .dom_maxrtkey = sizeof(struct ip_pack4), 491 .dom_if_up = in_if_up, 492 .dom_if_down = in_if_down, 493 .dom_ifattach = in_domifattach, 494 .dom_ifdetach = in_domifdetach, 495 .dom_if_link_state_change = in_if_link_state_change, 496 .dom_ifqueues = { NULL, NULL }, 497 .dom_link = { NULL }, 498 .dom_mowner = MOWNER_INIT("",""), 499 .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), 500 .dom_sa_cmplen = sizeof(struct in_addr), 501 .dom_sa_any = (const struct sockaddr *)&in_any, 502 .dom_sockaddr_const_addr = sockaddr_in_const_addr, 503 .dom_sockaddr_addr = sockaddr_in_addr, 504 }; 505 506 u_char ip_protox[IPPROTO_MAX]; 507 508 static void 509 sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) 510 { 511 socklen_t slen; 512 513 if (slenp == NULL) 514 return; 515 516 slen = sockaddr_getlen(sa); 517 *slenp = (socklen_t)MIN(sizeof(struct in_addr), 518 slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); 519 } 520 521 const void * 522 sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) 523 { 524 const struct sockaddr_in *sin; 525 526 sockaddr_in_addrlen(sa, slenp); 527 sin = (const struct sockaddr_in *)sa; 528 return &sin->sin_addr; 529 } 530 531 void * 532 sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) 533 { 534 struct sockaddr_in *sin; 535 536 sockaddr_in_addrlen(sa, slenp); 537 sin = (struct sockaddr_in *)sa; 538 return &sin->sin_addr; 539 } 540 541 int 542 sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) 543 { 544 uint_fast8_t len; 545 const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), 546 addrend = addrofs + sizeof(struct in_addr); 547 int rc; 548 const struct sockaddr_in *sin1, *sin2; 549 550 sin1 = satocsin(sa1); 551 sin2 = satocsin(sa2); 552 553 len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); 554 555 if (len > addrofs && 556 (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, 557 len - addrofs)) != 0) 558 return rc; 559 560 return sin1->sin_len - sin2->sin_len; 561 } 562
Indexes created Sun Oct 19 19:09:49 GMT 2025