| 1 | /* $NetBSD: in_proto.c,v 1.120 2016/04/26 08:44:44 ozaki-r 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 1.120 2016/04/26 08:44:44 ozaki-r 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 | #endif |
| 76 | |
| 77 | #include <sys/param.h> |
| 78 | #include <sys/socket.h> |
| 79 | #include <sys/protosw.h> |
| 80 | #include <sys/domain.h> |
| 81 | #include <sys/mbuf.h> |
| 82 | |
| 83 | #include <net/if.h> |
| 84 | |
| 85 | #include <netinet/in.h> |
| 86 | #include <netinet/in_systm.h> |
| 87 | #include <netinet/in_var.h> |
| 88 | #include <netinet/ip.h> |
| 89 | #include <netinet/ip_var.h> |
| 90 | #include <netinet/ip_icmp.h> |
| 91 | #include <netinet/in_ifattach.h> |
| 92 | #include <netinet/in_pcb.h> |
| 93 | #include <netinet/in_proto.h> |
| 94 | |
| 95 | #ifdef INET6 |
| 96 | #ifndef INET |
| 97 | #include <netinet/in.h> |
| 98 | #endif |
| 99 | #include <netinet/ip6.h> |
| 100 | #endif |
| 101 | |
| 102 | #include <netinet/igmp_var.h> |
| 103 | #ifdef PIM |
| 104 | #include <netinet/pim_var.h> |
| 105 | #endif |
| 106 | #include <netinet/tcp.h> |
| 107 | #include <netinet/tcp_fsm.h> |
| 108 | #include <netinet/tcp_seq.h> |
| 109 | #include <netinet/tcp_timer.h> |
| 110 | #include <netinet/tcp_var.h> |
| 111 | #include <netinet/tcpip.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 | #include "etherip.h" |
| 148 | #if NETHERIP > 0 |
| 149 | #include <netinet/ip_etherip.h> |
| 150 | #endif |
| 151 | |
| 152 | DOMAIN_DEFINE(inetdomain); /* forward declare and add to link set */ |
| 153 | |
| 154 | /* Wrappers to acquire kernel_lock. */ |
| 155 | |
| 156 | PR_WRAP_CTLINPUT(rip_ctlinput) |
| 157 | PR_WRAP_CTLINPUT(udp_ctlinput) |
| 158 | PR_WRAP_CTLINPUT(tcp_ctlinput) |
| 159 | |
| 160 | #define rip_ctlinput rip_ctlinput_wrapper |
| 161 | #define udp_ctlinput udp_ctlinput_wrapper |
| 162 | #define tcp_ctlinput tcp_ctlinput_wrapper |
| 163 | |
| 164 | PR_WRAP_CTLOUTPUT(rip_ctloutput) |
| 165 | PR_WRAP_CTLOUTPUT(udp_ctloutput) |
| 166 | PR_WRAP_CTLOUTPUT(tcp_ctloutput) |
| 167 | |
| 168 | #define rip_ctloutput rip_ctloutput_wrapper |
| 169 | #define udp_ctloutput udp_ctloutput_wrapper |
| 170 | #define tcp_ctloutput tcp_ctloutput_wrapper |
| 171 | |
| 172 | #ifdef DCCP |
| 173 | PR_WRAP_CTLINPUT(dccp_ctlinput) |
| 174 | PR_WRAP_CTLOUTPUT(dccp_ctloutput) |
| 175 | |
| 176 | #define dccp_ctlinput dccp_ctlinput_wrapper |
| 177 | #define dccp_ctloutput dccp_ctloutput_wrapper |
| 178 | #endif |
| 179 | |
| 180 | #ifdef SCTP |
| 181 | PR_WRAP_CTLINPUT(sctp_ctlinput) |
| 182 | PR_WRAP_CTLOUTPUT(sctp_ctloutput) |
| 183 | |
| 184 | #define sctp_ctlinput sctp_ctlinput_wrapper |
| 185 | #define sctp_ctloutput sctp_ctloutput_wrapper |
| 186 | #endif |
| 187 | |
| 188 | #if defined(IPSEC) |
| 189 | PR_WRAP_CTLINPUT(ah4_ctlinput) |
| 190 | |
| 191 | #define ah4_ctlinput ah4_ctlinput_wrapper |
| 192 | PR_WRAP_CTLINPUT(esp4_ctlinput) |
| 193 | |
| 194 | #define esp4_ctlinput esp4_ctlinput_wrapper |
| 195 | #endif |
| 196 | |
| 197 | const struct protosw inetsw[] = { |
| 198 | { .pr_domain = &inetdomain, |
| 199 | .pr_init = ip_init, |
| 200 | .pr_fasttimo = ip_fasttimo, |
| 201 | .pr_slowtimo = ip_slowtimo, |
| 202 | .pr_drain = ip_drainstub, |
| 203 | }, |
| 204 | { .pr_type = SOCK_DGRAM, |
| 205 | .pr_domain = &inetdomain, |
| 206 | .pr_protocol = IPPROTO_UDP, |
| 207 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, |
| 208 | .pr_input = udp_input, |
| 209 | .pr_ctlinput = udp_ctlinput, |
| 210 | .pr_ctloutput = udp_ctloutput, |
| 211 | .pr_usrreqs = &udp_usrreqs, |
| 212 | .pr_init = udp_init, |
| 213 | }, |
| 214 | { .pr_type = SOCK_STREAM, |
| 215 | .pr_domain = &inetdomain, |
| 216 | .pr_protocol = IPPROTO_TCP, |
| 217 | .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_LISTEN|PR_ABRTACPTDIS|PR_PURGEIF, |
| 218 | .pr_input = tcp_input, |
| 219 | .pr_ctlinput = tcp_ctlinput, |
| 220 | .pr_ctloutput = tcp_ctloutput, |
| 221 | .pr_usrreqs = &tcp_usrreqs, |
| 222 | .pr_init = tcp_init, |
| 223 | .pr_fasttimo = tcp_fasttimo, |
| 224 | .pr_drain = tcp_drainstub, |
| 225 | }, |
| 226 | #ifdef DCCP |
| 227 | { .pr_type = SOCK_CONN_DGRAM, |
| 228 | .pr_domain = &inetdomain, |
| 229 | .pr_protocol = IPPROTO_DCCP, |
| 230 | .pr_flags = PR_CONNREQUIRED|PR_WANTRCVD|PR_ATOMIC|PR_LISTEN|PR_ABRTACPTDIS, |
| 231 | .pr_input = dccp_input, |
| 232 | .pr_ctlinput = dccp_ctlinput, |
| 233 | .pr_ctloutput = dccp_ctloutput, |
| 234 | .pr_usrreqs = &dccp_usrreqs, |
| 235 | .pr_init = dccp_init, |
| 236 | }, |
| 237 | #endif |
| 238 | #ifdef SCTP |
| 239 | { .pr_type = SOCK_DGRAM, |
| 240 | .pr_domain = &inetdomain, |
| 241 | .pr_protocol = IPPROTO_SCTP, |
| 242 | .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, |
| 243 | .pr_input = sctp_input, |
| 244 | .pr_ctlinput = sctp_ctlinput, |
| 245 | .pr_ctloutput = sctp_ctloutput, |
| 246 | .pr_usrreqs = &sctp_usrreqs, |
| 247 | .pr_init = sctp_init, |
| 248 | .pr_drain = sctp_drain |
| 249 | }, |
| 250 | { .pr_type = SOCK_SEQPACKET, |
| 251 | .pr_domain = &inetdomain, |
| 252 | .pr_protocol = IPPROTO_SCTP, |
| 253 | .pr_flags = PR_ADDR_OPT|PR_WANTRCVD, |
| 254 | .pr_input = sctp_input, |
| 255 | .pr_ctlinput = sctp_ctlinput, |
| 256 | .pr_ctloutput = sctp_ctloutput, |
| 257 | .pr_usrreqs = &sctp_usrreqs, |
| 258 | .pr_drain = sctp_drain |
| 259 | }, |
| 260 | { .pr_type = SOCK_STREAM, |
| 261 | .pr_domain = &inetdomain, |
| 262 | .pr_protocol = IPPROTO_SCTP, |
| 263 | .pr_flags = PR_CONNREQUIRED|PR_ADDR_OPT|PR_WANTRCVD|PR_LISTEN, |
| 264 | .pr_input = sctp_input, |
| 265 | .pr_ctlinput = sctp_ctlinput, |
| 266 | .pr_ctloutput = sctp_ctloutput, |
| 267 | .pr_usrreqs = &sctp_usrreqs, |
| 268 | .pr_drain = sctp_drain |
| 269 | }, |
| 270 | #endif /* SCTP */ |
| 271 | { .pr_type = SOCK_RAW, |
| 272 | .pr_domain = &inetdomain, |
| 273 | .pr_protocol = IPPROTO_RAW, |
| 274 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_PURGEIF, |
| 275 | .pr_input = rip_input, |
| 276 | .pr_ctlinput = rip_ctlinput, |
| 277 | .pr_ctloutput = rip_ctloutput, |
| 278 | .pr_usrreqs = &rip_usrreqs, |
| 279 | }, |
| 280 | { .pr_type = SOCK_RAW, |
| 281 | .pr_domain = &inetdomain, |
| 282 | .pr_protocol = IPPROTO_ICMP, |
| 283 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
| 284 | .pr_input = icmp_input, |
| 285 | .pr_ctlinput = rip_ctlinput, |
| 286 | .pr_ctloutput = rip_ctloutput, |
| 287 | .pr_usrreqs = &rip_usrreqs, |
| 288 | .pr_init = icmp_init, |
| 289 | }, |
| 290 | #ifdef GATEWAY |
| 291 | { .pr_domain = &inetdomain, |
| 292 | .pr_protocol = IPPROTO_IP, |
| 293 | .pr_slowtimo = ipflow_slowtimo, |
| 294 | .pr_init = ipflow_poolinit, |
| 295 | }, |
| 296 | #endif /* GATEWAY */ |
| 297 | #ifdef IPSEC |
| 298 | { .pr_type = SOCK_RAW, |
| 299 | .pr_domain = &inetdomain, |
| 300 | .pr_protocol = IPPROTO_AH, |
| 301 | .pr_flags = PR_ATOMIC|PR_ADDR, |
| 302 | .pr_input = ipsec4_common_input, |
| 303 | .pr_ctlinput = ah4_ctlinput, |
| 304 | }, |
| 305 | { .pr_type = SOCK_RAW, |
| 306 | .pr_domain = &inetdomain, |
| 307 | .pr_protocol = IPPROTO_ESP, |
| 308 | .pr_flags = PR_ATOMIC|PR_ADDR, |
| 309 | .pr_input = ipsec4_common_input, |
| 310 | .pr_ctlinput = esp4_ctlinput, |
| 311 | }, |
| 312 | { .pr_type = SOCK_RAW, |
| 313 | .pr_domain = &inetdomain, |
| 314 | .pr_protocol = IPPROTO_IPCOMP, |
| 315 | .pr_flags = PR_ATOMIC|PR_ADDR, |
| 316 | .pr_input = ipsec4_common_input, |
| 317 | }, |
| 318 | #endif /* IPSEC */ |
| 319 | { .pr_type = SOCK_RAW, |
| 320 | .pr_domain = &inetdomain, |
| 321 | .pr_protocol = IPPROTO_IPV4, |
| 322 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
| 323 | .pr_input = encap4_input, |
| 324 | .pr_ctlinput = rip_ctlinput, |
| 325 | .pr_ctloutput = rip_ctloutput, |
| 326 | .pr_usrreqs = &rip_usrreqs, |
| 327 | .pr_init = encap_init, |
| 328 | }, |
| 329 | #ifdef INET6 |
| 330 | { .pr_type = SOCK_RAW, |
| 331 | .pr_domain = &inetdomain, |
| 332 | .pr_protocol = IPPROTO_IPV6, |
| 333 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
| 334 | .pr_input = encap4_input, |
| 335 | .pr_ctlinput = rip_ctlinput, |
| 336 | .pr_ctloutput = rip_ctloutput, |
| 337 | .pr_usrreqs = &rip_usrreqs, |
| 338 | .pr_init = encap_init, |
| 339 | }, |
| 340 | #endif /* INET6 */ |
| 341 | #if NETHERIP > 0 |
| 342 | { .pr_type = SOCK_RAW, |
| 343 | .pr_domain = &inetdomain, |
| 344 | .pr_protocol = IPPROTO_ETHERIP, |
| 345 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
| 346 | .pr_input = ip_etherip_input, |
| 347 | .pr_ctlinput = rip_ctlinput, |
| 348 | .pr_ctloutput = rip_ctloutput, |
| 349 | .pr_usrreqs = &rip_usrreqs, |
| 350 | }, |
| 351 | #endif /* NETHERIP > 0 */ |
| 352 | #if NCARP > 0 |
| 353 | { .pr_type = SOCK_RAW, |
| 354 | .pr_domain = &inetdomain, |
| 355 | .pr_protocol = IPPROTO_CARP, |
| 356 | .pr_flags = PR_ATOMIC|PR_ADDR, |
| 357 | .pr_input = carp_proto_input, |
| 358 | .pr_ctloutput = rip_ctloutput, |
| 359 | .pr_usrreqs = &rip_usrreqs, |
| 360 | .pr_init = carp_init, |
| 361 | }, |
| 362 | #endif /* NCARP > 0 */ |
| 363 | #if NPFSYNC > 0 |
| 364 | { .pr_type = SOCK_RAW, |
| 365 | .pr_domain = &inetdomain, |
| 366 | .pr_protocol = IPPROTO_PFSYNC, |
| 367 | .pr_flags = PR_ATOMIC|PR_ADDR, |
| 368 | .pr_input = pfsync_input, |
| 369 | .pr_ctloutput = rip_ctloutput, |
| 370 | .pr_usrreqs = &rip_usrreqs, |
| 371 | }, |
| 372 | #endif /* NPFSYNC > 0 */ |
| 373 | { .pr_type = SOCK_RAW, |
| 374 | .pr_domain = &inetdomain, |
| 375 | .pr_protocol = IPPROTO_IGMP, |
| 376 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
| 377 | .pr_input = igmp_input, |
| 378 | .pr_ctloutput = rip_ctloutput, |
| 379 | .pr_ctlinput = rip_ctlinput, |
| 380 | .pr_usrreqs = &rip_usrreqs, |
| 381 | .pr_fasttimo = igmp_fasttimo, |
| 382 | .pr_slowtimo = igmp_slowtimo, |
| 383 | .pr_init = igmp_init, |
| 384 | }, |
| 385 | #ifdef PIM |
| 386 | { .pr_type = SOCK_RAW, |
| 387 | .pr_domain = &inetdomain, |
| 388 | .pr_protocol = IPPROTO_PIM, |
| 389 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
| 390 | .pr_input = pim_input, |
| 391 | .pr_ctloutput = rip_ctloutput, |
| 392 | .pr_ctlinput = rip_ctlinput, |
| 393 | .pr_usrreqs = &rip_usrreqs, |
| 394 | }, |
| 395 | #endif /* PIM */ |
| 396 | /* raw wildcard */ |
| 397 | { .pr_type = SOCK_RAW, |
| 398 | .pr_domain = &inetdomain, |
| 399 | .pr_flags = PR_ATOMIC|PR_ADDR|PR_LASTHDR, |
| 400 | .pr_input = rip_input, |
| 401 | .pr_ctloutput = rip_ctloutput, |
| 402 | .pr_ctlinput = rip_ctlinput, |
| 403 | .pr_usrreqs = &rip_usrreqs, |
| 404 | .pr_init = rip_init, |
| 405 | }, |
| 406 | }; |
| 407 | |
| 408 | const struct sockaddr_in in_any = { |
| 409 | .sin_len = sizeof(struct sockaddr_in) |
| 410 | , .sin_family = AF_INET |
| 411 | , .sin_port = 0 |
| 412 | , .sin_addr = {.s_addr = 0 /* INADDR_ANY */} |
| 413 | }; |
| 414 | |
| 415 | struct domain inetdomain = { |
| 416 | .dom_family = PF_INET, .dom_name = "internet" , .dom_init = NULL, |
| 417 | .dom_externalize = NULL, .dom_dispose = NULL, |
| 418 | .dom_protosw = inetsw, |
| 419 | .dom_protoswNPROTOSW = &inetsw[__arraycount(inetsw)], |
| 420 | .dom_rtattach = rt_inithead, |
| 421 | .dom_rtoffset = 32, |
| 422 | .dom_maxrtkey = sizeof(struct ip_pack4), |
| 423 | .dom_if_up = in_if_up, |
| 424 | .dom_if_down = in_if_down, |
| 425 | .dom_ifattach = in_domifattach, |
| 426 | .dom_ifdetach = in_domifdetach, |
| 427 | .dom_if_link_state_change = in_if_link_state_change, |
| 428 | .dom_ifqueues = { NULL, NULL }, |
| 429 | .dom_link = { NULL }, |
| 430 | .dom_mowner = MOWNER_INIT("" ,"" ), |
| 431 | .dom_sa_cmpofs = offsetof(struct sockaddr_in, sin_addr), |
| 432 | .dom_sa_cmplen = sizeof(struct in_addr), |
| 433 | .dom_sa_any = (const struct sockaddr *)&in_any, |
| 434 | .dom_sockaddr_const_addr = sockaddr_in_const_addr, |
| 435 | .dom_sockaddr_addr = sockaddr_in_addr, |
| 436 | .dom_rtcache = LIST_HEAD_INITIALIZER(inetdomain.dom_rtcache) |
| 437 | }; |
| 438 | |
| 439 | u_char ip_protox[IPPROTO_MAX]; |
| 440 | |
| 441 | int icmperrppslim = 100; /* 100pps */ |
| 442 | |
| 443 | static void |
| 444 | sockaddr_in_addrlen(const struct sockaddr *sa, socklen_t *slenp) |
| 445 | { |
| 446 | socklen_t slen; |
| 447 | |
| 448 | if (slenp == NULL) |
| 449 | return; |
| 450 | |
| 451 | slen = sockaddr_getlen(sa); |
| 452 | *slenp = (socklen_t)MIN(sizeof(struct in_addr), |
| 453 | slen - MIN(slen, offsetof(struct sockaddr_in, sin_addr))); |
| 454 | } |
| 455 | |
| 456 | const void * |
| 457 | sockaddr_in_const_addr(const struct sockaddr *sa, socklen_t *slenp) |
| 458 | { |
| 459 | const struct sockaddr_in *sin; |
| 460 | |
| 461 | sockaddr_in_addrlen(sa, slenp); |
| 462 | sin = (const struct sockaddr_in *)sa; |
| 463 | return &sin->sin_addr; |
| 464 | } |
| 465 | |
| 466 | void * |
| 467 | sockaddr_in_addr(struct sockaddr *sa, socklen_t *slenp) |
| 468 | { |
| 469 | struct sockaddr_in *sin; |
| 470 | |
| 471 | sockaddr_in_addrlen(sa, slenp); |
| 472 | sin = (struct sockaddr_in *)sa; |
| 473 | return &sin->sin_addr; |
| 474 | } |
| 475 | |
| 476 | int |
| 477 | sockaddr_in_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2) |
| 478 | { |
| 479 | uint_fast8_t len; |
| 480 | const uint_fast8_t addrofs = offsetof(struct sockaddr_in, sin_addr), |
| 481 | addrend = addrofs + sizeof(struct in_addr); |
| 482 | int rc; |
| 483 | const struct sockaddr_in *sin1, *sin2; |
| 484 | |
| 485 | sin1 = satocsin(sa1); |
| 486 | sin2 = satocsin(sa2); |
| 487 | |
| 488 | len = MIN(addrend, MIN(sin1->sin_len, sin2->sin_len)); |
| 489 | |
| 490 | if (len > addrofs && |
| 491 | (rc = memcmp(&sin1->sin_addr, &sin2->sin_addr, |
| 492 | len - addrofs)) != 0) |
| 493 | return rc; |
| 494 | |
| 495 | return sin1->sin_len - sin2->sin_len; |
| 496 | } |
| 497 | |