contrib/ntp/libisc/sockaddr.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: sockaddr.c,v 1.48.2.1.2.10 2004/05/15 03:46:12 jinmei Exp $ */
  19
  20 #include <config.h>
  21
  22 #define ISC_ONLY_IPV6
  23
  24 #include <stdio.h>
  25
  26 #include <isc/buffer.h>
  27 /*
  28  * We currently don't need hashing here
  29  */
  30 #if 0
  31 #include <isc/hash.h>
  32 #endif
  33
  34 #include <isc/msgs.h>
  35 #include <isc/netaddr.h>
  36 #include <isc/print.h>
  37 #include <isc/region.h>
  38 #include <isc/sockaddr.h>
  39 #include <isc/string.h>
  40 #include <isc/util.h>
  41
  42 isc_boolean_t
  43 isc_sockaddr_equal(const isc_sockaddr_t *a, const isc_sockaddr_t *b) {
  44         REQUIRE(a != NULL && b != NULL);
  45
  46         if (a->length != b->length)
  47                 return (ISC_FALSE);
  48
  49         /*
  50          * We don't just memcmp because the sin_zero field isn't always
  51          * zero.
  52          */
  53
  54         if (a->type.sa.sa_family != b->type.sa.sa_family)
  55                 return (ISC_FALSE);
  56         switch (a->type.sa.sa_family) {
  57         case AF_INET:
  58                 if (memcmp(&a->type.sin.sin_addr, &b->type.sin.sin_addr,
  59                            sizeof(a->type.sin.sin_addr)) != 0)
  60                         return (ISC_FALSE);
  61                 if (a->type.sin.sin_port != b->type.sin.sin_port)
  62                         return (ISC_FALSE);
  63                 break;
  64         case AF_INET6:
  65                 if (memcmp(&a->type.sin6.sin6_addr, &b->type.sin6.sin6_addr,
  66                            sizeof(a->type.sin6.sin6_addr)) != 0)
  67                         return (ISC_FALSE);
  68 #ifdef ISC_PLATFORM_HAVESCOPEID
  69                 if (a->type.sin6.sin6_scope_id != b->type.sin6.sin6_scope_id)
  70                         return (ISC_FALSE);
  71 #endif
  72                 if (a->type.sin6.sin6_port != b->type.sin6.sin6_port)
  73                         return (ISC_FALSE);
  74                 break;
  75         default:
  76                 if (memcmp(&a->type, &b->type, a->length) != 0)
  77                         return (ISC_FALSE);
  78         }
  79         return (ISC_TRUE);
  80 }
  81
  82 isc_boolean_t
  83 isc_sockaddr_eqaddr(const isc_sockaddr_t *a, const isc_sockaddr_t *b) {
  84         REQUIRE(a != NULL && b != NULL);
  85
  86         if (a->length != b->length)
  87                 return (ISC_FALSE);
  88
  89         if (a->type.sa.sa_family != b->type.sa.sa_family)
  90                 return (ISC_FALSE);
  91         switch (a->type.sa.sa_family) {
  92         case AF_INET:
  93                 if (memcmp(&a->type.sin.sin_addr, &b->type.sin.sin_addr,
  94                            sizeof(a->type.sin.sin_addr)) != 0)
  95                         return (ISC_FALSE);
  96                 break;
  97         case AF_INET6:
  98                 if (memcmp(&a->type.sin6.sin6_addr, &b->type.sin6.sin6_addr,
  99                            sizeof(a->type.sin6.sin6_addr)) != 0)
 100                         return (ISC_FALSE);
 101 #ifdef ISC_PLATFORM_HAVESCOPEID
 102                 if (a->type.sin6.sin6_scope_id != b->type.sin6.sin6_scope_id)
 103                         return (ISC_FALSE);
 104 #endif
 105                 break;
 106         default:
 107                 if (memcmp(&a->type, &b->type, a->length) != 0)
 108                         return (ISC_FALSE);
 109         }
 110         return (ISC_TRUE);
 111 }
 112
 113 isc_boolean_t
 114 isc_sockaddr_eqaddrprefix(const isc_sockaddr_t *a, const isc_sockaddr_t *b,
 115                           unsigned int prefixlen)
 116 {
 117         isc_netaddr_t na, nb;
 118         isc_netaddr_fromsockaddr(&na, a);
 119         isc_netaddr_fromsockaddr(&nb, b);
 120         return (isc_netaddr_eqprefix(&na, &nb, prefixlen));
 121 }
 122
 123 isc_result_t
 124 isc_sockaddr_totext(const isc_sockaddr_t *sockaddr, isc_buffer_t *target) {
 125         isc_result_t result;
 126         isc_netaddr_t netaddr;
 127         char pbuf[sizeof("65000")];
 128         unsigned int plen;
 129         isc_region_t avail;
 130
 131         REQUIRE(sockaddr != NULL);
 132
 133         /*
 134          * Do the port first, giving us the opportunity to check for
 135          * unsupported address families before calling
 136          * isc_netaddr_fromsockaddr().
 137          */
 138         switch (sockaddr->type.sa.sa_family) {
 139         case AF_INET:
 140                 snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin.sin_port));
 141                 break;
 142         case AF_INET6:
 143                 snprintf(pbuf, sizeof(pbuf), "%u", ntohs(sockaddr->type.sin6.sin6_port));
 144                 break;
 145         default:
 146                 return (ISC_R_FAILURE);
 147         }
 148
 149         plen = strlen(pbuf);
 150         INSIST(plen < sizeof(pbuf));
 151
 152         isc_netaddr_fromsockaddr(&netaddr, sockaddr);
 153         result = isc_netaddr_totext(&netaddr, target);
 154         if (result != ISC_R_SUCCESS)
 155                 return (result);
 156
 157         if (1 + plen + 1 > isc_buffer_availablelength(target))
 158                 return (ISC_R_NOSPACE);
 159
 160         isc_buffer_putmem(target, (const unsigned char *)"#", 1);
 161         isc_buffer_putmem(target, (const unsigned char *)pbuf, plen);
 162
 163         /*
 164          * Null terminate after used region.
 165          */
 166         isc_buffer_availableregion(target, &avail);
 167         INSIST(avail.length >= 1);
 168         avail.base[0] = '\0';
 169
 170         return (ISC_R_SUCCESS);
 171 }
 172
 173 void
 174 isc_sockaddr_format(const isc_sockaddr_t *sa, char *array, unsigned int size) {
 175         isc_result_t result;
 176         isc_buffer_t buf;
 177
 178         isc_buffer_init(&buf, array, size);
 179         result = isc_sockaddr_totext(sa, &buf);
 180         if (result != ISC_R_SUCCESS) {
 181                 /*
 182                  * The message is the same as in netaddr.c.
 183                  */
 184                 snprintf(array, size,
 185                          isc_msgcat_get(isc_msgcat, ISC_MSGSET_NETADDR,
 186                                         ISC_MSG_UNKNOWNADDR,
 187                                         "<unknown address, family %u>"),
 188                          sa->type.sa.sa_family);
 189                 array[size - 1] = '\0';
 190         }
 191 }
 192
 193 #if 0
 194 /*
 195  * We currently don't need hashing here
 196  */
 197 unsigned int
 198 isc_sockaddr_hash(const isc_sockaddr_t *sockaddr, isc_boolean_t address_only) {
 199         unsigned int length = 0;
 200         const unsigned char *s = NULL;
 201         unsigned int h = 0;
 202         unsigned int g;
 203         unsigned int p = 0;
 204         const struct in6_addr *in6;
 205
 206         REQUIRE(sockaddr != NULL);
 207
 208         switch (sockaddr->type.sa.sa_family) {
 209         case AF_INET:
 210                 s = (const unsigned char *)&sockaddr->type.sin.sin_addr;
 211                 p = ntohs(sockaddr->type.sin.sin_port);
 212                 length = sizeof(sockaddr->type.sin.sin_addr.s_addr);
 213                 break;
 214 #if ISC_PLATFORM_HAVEIPV6
 215         case AF_INET6:
 216                 in6 = &sockaddr->type.sin6.sin6_addr;
 217                 if (IN6_IS_ADDR_V4MAPPED(in6)) {
 218                         s = (const unsigned char *)&in6[12];
 219                         length = sizeof(sockaddr->type.sin.sin_addr.s_addr);
 220                 } else {
 221                         s = (const unsigned char *)in6;
 222                         length = sizeof(sockaddr->type.sin6.sin6_addr);
 223                 }
 224                 p = ntohs(sockaddr->type.sin6.sin6_port);
 225                 break;
 226 #endif
 227         default:
 228                 UNEXPECTED_ERROR(__FILE__, __LINE__,
 229                                  isc_msgcat_get(isc_msgcat,
 230                                                 ISC_MSGSET_SOCKADDR,
 231                                                 ISC_MSG_UNKNOWNFAMILY,
 232                                                 "unknown address family: %d"),
 233                                              (int)sockaddr->type.sa.sa_family);
 234                 s = (const unsigned char *)&sockaddr->type;
 235                 length = sockaddr->length;
 236                 p = 0;
 237         }
 238
 239         h = isc_hash_calc(s, length, ISC_TRUE);
 240         if (!address_only) {
 241                 g = isc_hash_calc((const unsigned char *)&p, sizeof(p),
 242                                   ISC_TRUE);
 243                 h = h ^ g; /* XXX: we should concatenate h and p first */
 244         }
 245
 246         return (h);
 247 }
 248 #endif
 249
 250 void
 251 isc_sockaddr_any(isc_sockaddr_t *sockaddr)
 252 {
 253         memset(sockaddr, 0, sizeof(*sockaddr));
 254         sockaddr->type.sin.sin_family = AF_INET;
 255 #ifdef ISC_PLATFORM_HAVESALEN
 256         sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
 257 #endif
 258         sockaddr->type.sin.sin_addr.s_addr = INADDR_ANY;
 259         sockaddr->type.sin.sin_port = 0;
 260         sockaddr->length = sizeof(sockaddr->type.sin);
 261         ISC_LINK_INIT(sockaddr, link);
 262 }
 263
 264 void
 265 isc_sockaddr_any6(isc_sockaddr_t *sockaddr)
 266 {
 267 #ifdef ISC_PLATFORM_HAVEIPV6
 268         memset(sockaddr, 0, sizeof(*sockaddr));
 269         sockaddr->type.sin6.sin6_family = AF_INET6;
 270 #ifdef ISC_PLATFORM_HAVESALEN
 271         sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
 272 #endif
 273         sockaddr->type.sin6.sin6_addr = in6addr_any;
 274         sockaddr->type.sin6.sin6_port = 0;
 275         sockaddr->length = sizeof(sockaddr->type.sin6);
 276         ISC_LINK_INIT(sockaddr, link);
 277 #endif
 278 }
 279
 280 void
 281 isc_sockaddr_fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina,
 282                     in_port_t port)
 283 {
 284         memset(sockaddr, 0, sizeof(*sockaddr));
 285         sockaddr->type.sin.sin_family = AF_INET;
 286 #ifdef ISC_PLATFORM_HAVESALEN
 287         sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
 288 #endif
 289         sockaddr->type.sin.sin_addr = *ina;
 290         sockaddr->type.sin.sin_port = htons(port);
 291         sockaddr->length = sizeof(sockaddr->type.sin);
 292         ISC_LINK_INIT(sockaddr, link);
 293 }
 294
 295 void
 296 isc_sockaddr_anyofpf(isc_sockaddr_t *sockaddr, int pf) {
 297      switch (pf) {
 298      case AF_INET:
 299              isc_sockaddr_any(sockaddr);
 300              break;
 301      case AF_INET6:
 302              isc_sockaddr_any6(sockaddr);
 303              break;
 304      default:
 305              INSIST(0);
 306      }
 307 }
 308
 309 void
 310 isc_sockaddr_fromin6(isc_sockaddr_t *sockaddr, const struct in6_addr *ina6,
 311                      in_port_t port)
 312 {
 313         memset(sockaddr, 0, sizeof(*sockaddr));
 314         sockaddr->type.sin6.sin6_family = AF_INET6;
 315 #ifdef ISC_PLATFORM_HAVESALEN
 316         sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
 317 #endif
 318         sockaddr->type.sin6.sin6_addr = *ina6;
 319         sockaddr->type.sin6.sin6_port = htons(port);
 320         sockaddr->length = sizeof(sockaddr->type.sin6);
 321         ISC_LINK_INIT(sockaddr, link);
 322 }
 323
 324 void
 325 isc_sockaddr_v6fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina,
 326                       in_port_t port)
 327 {
 328         memset(sockaddr, 0, sizeof(*sockaddr));
 329         sockaddr->type.sin6.sin6_family = AF_INET6;
 330 #ifdef ISC_PLATFORM_HAVESALEN
 331         sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
 332 #endif
 333         sockaddr->type.sin6.sin6_addr.s6_addr[10] = 0xff;
 334         sockaddr->type.sin6.sin6_addr.s6_addr[11] = 0xff;
 335         memcpy(&sockaddr->type.sin6.sin6_addr.s6_addr[12], ina, 4);
 336         sockaddr->type.sin6.sin6_port = htons(port);
 337         sockaddr->length = sizeof(sockaddr->type.sin6);
 338         ISC_LINK_INIT(sockaddr, link);
 339 }
 340
 341 int
 342 isc_sockaddr_pf(const isc_sockaddr_t *sockaddr) {
 343
 344         /*
 345          * Get the protocol family of 'sockaddr'.
 346          */
 347
 348 #if (AF_INET == PF_INET && AF_INET6 == PF_INET6)
 349         /*
 350          * Assume that PF_xxx == AF_xxx for all AF and PF.
 351          */
 352         return (sockaddr->type.sa.sa_family);
 353 #else
 354         switch (sockaddr->type.sa.sa_family) {
 355         case AF_INET:
 356                 return (PF_INET);
 357         case AF_INET6:
 358                 return (PF_INET6);
 359         default:
 360                 FATAL_ERROR(__FILE__, __LINE__,
 361                             isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
 362                                            ISC_MSG_UNKNOWNFAMILY,
 363                                            "unknown address family: %d"),
 364                             (int)sockaddr->type.sa.sa_family);
 365         }
 366 #endif
 367 }
 368
 369 void
 370 isc_sockaddr_fromnetaddr(isc_sockaddr_t *sockaddr, const isc_netaddr_t *na,
 371                     in_port_t port)
 372 {
 373         memset(sockaddr, 0, sizeof(*sockaddr));
 374         sockaddr->type.sin.sin_family = na->family;
 375         switch (na->family) {
 376         case AF_INET:
 377                 sockaddr->length = sizeof(sockaddr->type.sin);
 378 #ifdef ISC_PLATFORM_HAVESALEN
 379                 sockaddr->type.sin.sin_len = sizeof(sockaddr->type.sin);
 380 #endif
 381                 sockaddr->type.sin.sin_addr = na->type.in;
 382                 sockaddr->type.sin.sin_port = htons(port);
 383                 break;
 384         case AF_INET6:
 385                 sockaddr->length = sizeof(sockaddr->type.sin6);
 386 #ifdef ISC_PLATFORM_HAVESALEN
 387                 sockaddr->type.sin6.sin6_len = sizeof(sockaddr->type.sin6);
 388 #endif
 389                 memcpy(&sockaddr->type.sin6.sin6_addr, &na->type.in6, 16);
 390 #ifdef ISC_PLATFORM_HAVESCOPEID
 391                 sockaddr->type.sin6.sin6_scope_id = isc_netaddr_getzone(na);
 392 #endif
 393                 sockaddr->type.sin6.sin6_port = htons(port);
 394                 break;
 395         default:
 396                 INSIST(0);
 397         }
 398         ISC_LINK_INIT(sockaddr, link);
 399 }
 400
 401 void
 402 isc_sockaddr_setport(isc_sockaddr_t *sockaddr, in_port_t port) {
 403         switch (sockaddr->type.sa.sa_family) {
 404         case AF_INET:
 405                 sockaddr->type.sin.sin_port = htons(port);
 406                 break;
 407         case AF_INET6:
 408                 sockaddr->type.sin6.sin6_port = htons(port);
 409                 break;
 410         default:
 411                 FATAL_ERROR(__FILE__, __LINE__,
 412                             isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
 413                                            ISC_MSG_UNKNOWNFAMILY,
 414                                            "unknown address family: %d"),
 415                             (int)sockaddr->type.sa.sa_family);
 416         }
 417 }
 418
 419 in_port_t
 420 isc_sockaddr_getport(isc_sockaddr_t *sockaddr) {
 421         in_port_t port = 0;
 422
 423         switch (sockaddr->type.sa.sa_family) {
 424         case AF_INET:
 425                 port = ntohs(sockaddr->type.sin.sin_port);
 426                 break;
 427         case AF_INET6:
 428                 port = ntohs(sockaddr->type.sin6.sin6_port);
 429                 break;
 430         default:
 431                 FATAL_ERROR(__FILE__, __LINE__,
 432                             isc_msgcat_get(isc_msgcat, ISC_MSGSET_SOCKADDR,
 433                                            ISC_MSG_UNKNOWNFAMILY,
 434                                            "unknown address family: %d"),
 435                             (int)sockaddr->type.sa.sa_family);
 436         }
 437
 438         return (port);
 439 }
 440
 441 isc_boolean_t
 442 isc_sockaddr_ismulticast(isc_sockaddr_t *sockaddr) {
 443         isc_netaddr_t netaddr;
 444
 445         isc_netaddr_fromsockaddr(&netaddr, sockaddr);
 446         return (isc_netaddr_ismulticast(&netaddr));
 447 }
 448
 449 isc_boolean_t
 450 isc_sockaddr_isexperimental(isc_sockaddr_t *sockaddr) {
 451         isc_netaddr_t netaddr;
 452
 453         if (sockaddr->type.sa.sa_family == AF_INET) {
 454                 isc_netaddr_fromsockaddr(&netaddr, sockaddr);
 455                 return (isc_netaddr_isexperimental(&netaddr));
 456         }
 457         return (ISC_FALSE);
 458 }
 459
 460 isc_boolean_t
 461 isc_sockaddr_issitelocal(isc_sockaddr_t *sockaddr) {
 462         isc_netaddr_t netaddr;
 463
 464         if (sockaddr->type.sa.sa_family == AF_INET6) {
 465                 isc_netaddr_fromsockaddr(&netaddr, sockaddr);
 466                 return (isc_netaddr_issitelocal(&netaddr));
 467         }
 468         return (ISC_FALSE);
 469 }
 470
 471 isc_boolean_t
 472 isc_sockaddr_islinklocal(isc_sockaddr_t *sockaddr) {
 473         isc_netaddr_t netaddr;
 474
 475         if (sockaddr->type.sa.sa_family == AF_INET6) {
 476                 isc_netaddr_fromsockaddr(&netaddr, sockaddr);
 477                 return (isc_netaddr_islinklocal(&netaddr));
 478         }
 479         return (ISC_FALSE);
 480 }