sockaddr.c revision 251886
1/* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "apr_arch_networkio.h" 18#include "apr_strings.h" 19#include "apr.h" 20#include "apr_lib.h" 21#include "apr_strings.h" 22#include "apr_private.h" 23 24#if APR_HAVE_STDLIB_H 25#include <stdlib.h> 26#endif 27 28#define APR_WANT_STRFUNC 29#include "apr_want.h" 30 31struct apr_ipsubnet_t { 32 int family; 33#if APR_HAVE_IPV6 34 apr_uint32_t sub[4]; /* big enough for IPv4 and IPv6 addresses */ 35 apr_uint32_t mask[4]; 36#else 37 apr_uint32_t sub[1]; 38 apr_uint32_t mask[1]; 39#endif 40}; 41 42#if !defined(NETWARE) && !defined(WIN32) 43#ifdef HAVE_SET_H_ERRNO 44#define SET_H_ERRNO(newval) set_h_errno(newval) 45#else 46#define SET_H_ERRNO(newval) h_errno = (newval) 47#endif 48#else 49#define SET_H_ERRNO(newval) 50#endif 51 52#if APR_HAS_THREADS && !defined(GETHOSTBYNAME_IS_THREAD_SAFE) && \ 53 defined(HAVE_GETHOSTBYNAME_R) 54/* This is the maximum size that may be returned from the reentrant 55 * gethostbyname_r function. If the system tries to use more, it 56 * should return ERANGE. 57 */ 58#define GETHOSTBYNAME_BUFLEN 512 59#endif 60 61#ifdef _AIX 62/* Some levels of AIX getaddrinfo() don't like servname = "0", so 63 * set servname to "1" when port is 0 and fix it up later. 64 */ 65#define AIX_SERVNAME_HACK 1 66#else 67#define AIX_SERVNAME_HACK 0 68#endif 69 70#ifdef _WIN32_WCE 71/* XXX: BS solution. Need an HAVE_GETSERVBYNAME and actually 72 * do something here, to provide the obvious proto mappings. 73 */ 74static void *getservbyname(const char *name, const char *proto) 75{ 76 return NULL; 77} 78#endif 79 80static apr_status_t get_local_addr(apr_socket_t *sock) 81{ 82 sock->local_addr->salen = sizeof(sock->local_addr->sa); 83 if (getsockname(sock->socketdes, (struct sockaddr *)&sock->local_addr->sa, 84 &sock->local_addr->salen) < 0) { 85 return apr_get_netos_error(); 86 } 87 else { 88 sock->local_port_unknown = sock->local_interface_unknown = 0; 89 /* XXX assumes sin_port and sin6_port at same offset */ 90 sock->local_addr->port = ntohs(sock->local_addr->sa.sin.sin_port); 91 return APR_SUCCESS; 92 } 93} 94 95static apr_status_t get_remote_addr(apr_socket_t *sock) 96{ 97 sock->remote_addr->salen = sizeof(sock->remote_addr->sa); 98 if (getpeername(sock->socketdes, (struct sockaddr *)&sock->remote_addr->sa, 99 &sock->remote_addr->salen) < 0) { 100 return apr_get_netos_error(); 101 } 102 else { 103 sock->remote_addr_unknown = 0; 104 /* XXX assumes sin_port and sin6_port at same offset */ 105 sock->remote_addr->port = ntohs(sock->remote_addr->sa.sin.sin_port); 106 return APR_SUCCESS; 107 } 108} 109 110APR_DECLARE(apr_status_t) apr_sockaddr_ip_getbuf(char *buf, apr_size_t buflen, 111 apr_sockaddr_t *sockaddr) 112{ 113 if (!apr_inet_ntop(sockaddr->family, sockaddr->ipaddr_ptr, buf, buflen)) { 114 return APR_ENOSPC; 115 } 116 117#if APR_HAVE_IPV6 118 if (sockaddr->family == AF_INET6 119 && IN6_IS_ADDR_V4MAPPED((struct in6_addr *)sockaddr->ipaddr_ptr) 120 && buflen > strlen("::ffff:")) { 121 /* This is an IPv4-mapped IPv6 address; drop the leading 122 * part of the address string so we're left with the familiar 123 * IPv4 format. 124 */ 125 memmove(buf, buf + strlen("::ffff:"), 126 strlen(buf + strlen("::ffff:"))+1); 127 } 128#endif 129 /* ensure NUL termination if the buffer is too short */ 130 buf[buflen-1] = '\0'; 131 return APR_SUCCESS; 132} 133 134APR_DECLARE(apr_status_t) apr_sockaddr_ip_get(char **addr, 135 apr_sockaddr_t *sockaddr) 136{ 137 *addr = apr_palloc(sockaddr->pool, sockaddr->addr_str_len); 138 return apr_sockaddr_ip_getbuf(*addr, sockaddr->addr_str_len, sockaddr); 139} 140 141void apr_sockaddr_vars_set(apr_sockaddr_t *addr, int family, apr_port_t port) 142{ 143 addr->family = family; 144 addr->sa.sin.sin_family = family; 145 if (port) { 146 /* XXX IPv6: assumes sin_port and sin6_port at same offset */ 147 addr->sa.sin.sin_port = htons(port); 148 addr->port = port; 149 } 150#if AIX_SERVNAME_HACK 151 else { 152 addr->sa.sin.sin_port = htons(port); 153 } 154#endif 155 156 if (family == APR_INET) { 157 addr->salen = sizeof(struct sockaddr_in); 158 addr->addr_str_len = 16; 159 addr->ipaddr_ptr = &(addr->sa.sin.sin_addr); 160 addr->ipaddr_len = sizeof(struct in_addr); 161 } 162#if APR_HAVE_IPV6 163 else if (family == APR_INET6) { 164 addr->salen = sizeof(struct sockaddr_in6); 165 addr->addr_str_len = 46; 166 addr->ipaddr_ptr = &(addr->sa.sin6.sin6_addr); 167 addr->ipaddr_len = sizeof(struct in6_addr); 168 } 169#endif 170} 171 172APR_DECLARE(apr_status_t) apr_socket_addr_get(apr_sockaddr_t **sa, 173 apr_interface_e which, 174 apr_socket_t *sock) 175{ 176 if (which == APR_LOCAL) { 177 if (sock->local_interface_unknown || sock->local_port_unknown) { 178 apr_status_t rv = get_local_addr(sock); 179 180 if (rv != APR_SUCCESS) { 181 return rv; 182 } 183 } 184 *sa = sock->local_addr; 185 } 186 else if (which == APR_REMOTE) { 187 if (sock->remote_addr_unknown) { 188 apr_status_t rv = get_remote_addr(sock); 189 190 if (rv != APR_SUCCESS) { 191 return rv; 192 } 193 } 194 *sa = sock->remote_addr; 195 } 196 else { 197 *sa = NULL; 198 return APR_EINVAL; 199 } 200 return APR_SUCCESS; 201} 202 203APR_DECLARE(apr_status_t) apr_parse_addr_port(char **addr, 204 char **scope_id, 205 apr_port_t *port, 206 const char *str, 207 apr_pool_t *p) 208{ 209 const char *ch, *lastchar; 210 int big_port; 211 apr_size_t addrlen; 212 213 *addr = NULL; /* assume not specified */ 214 *scope_id = NULL; /* assume not specified */ 215 *port = 0; /* assume not specified */ 216 217 /* First handle the optional port number. That may be all that 218 * is specified in the string. 219 */ 220 ch = lastchar = str + strlen(str) - 1; 221 while (ch >= str && apr_isdigit(*ch)) { 222 --ch; 223 } 224 225 if (ch < str) { /* Entire string is the port. */ 226 big_port = atoi(str); 227 if (big_port < 1 || big_port > 65535) { 228 return APR_EINVAL; 229 } 230 *port = big_port; 231 return APR_SUCCESS; 232 } 233 234 if (*ch == ':' && ch < lastchar) { /* host and port number specified */ 235 if (ch == str) { /* string starts with ':' -- bad */ 236 return APR_EINVAL; 237 } 238 big_port = atoi(ch + 1); 239 if (big_port < 1 || big_port > 65535) { 240 return APR_EINVAL; 241 } 242 *port = big_port; 243 lastchar = ch - 1; 244 } 245 246 /* now handle the hostname */ 247 addrlen = lastchar - str + 1; 248 249/* XXX we don't really have to require APR_HAVE_IPV6 for this; 250 * just pass char[] for ipaddr (so we don't depend on struct in6_addr) 251 * and always define APR_INET6 252 */ 253#if APR_HAVE_IPV6 254 if (*str == '[') { 255 const char *end_bracket = memchr(str, ']', addrlen); 256 struct in6_addr ipaddr; 257 const char *scope_delim; 258 259 if (!end_bracket || end_bracket != lastchar) { 260 *port = 0; 261 return APR_EINVAL; 262 } 263 264 /* handle scope id; this is the only context where it is allowed */ 265 scope_delim = memchr(str, '%', addrlen); 266 if (scope_delim) { 267 if (scope_delim == end_bracket - 1) { /* '%' without scope id */ 268 *port = 0; 269 return APR_EINVAL; 270 } 271 addrlen = scope_delim - str - 1; 272 *scope_id = apr_palloc(p, end_bracket - scope_delim); 273 memcpy(*scope_id, scope_delim + 1, end_bracket - scope_delim - 1); 274 (*scope_id)[end_bracket - scope_delim - 1] = '\0'; 275 } 276 else { 277 addrlen = addrlen - 2; /* minus 2 for '[' and ']' */ 278 } 279 280 *addr = apr_palloc(p, addrlen + 1); 281 memcpy(*addr, 282 str + 1, 283 addrlen); 284 (*addr)[addrlen] = '\0'; 285 if (apr_inet_pton(AF_INET6, *addr, &ipaddr) != 1) { 286 *addr = NULL; 287 *scope_id = NULL; 288 *port = 0; 289 return APR_EINVAL; 290 } 291 } 292 else 293#endif 294 { 295 /* XXX If '%' is not a valid char in a DNS name, we *could* check 296 * for bogus scope ids first. 297 */ 298 *addr = apr_palloc(p, addrlen + 1); 299 memcpy(*addr, str, addrlen); 300 (*addr)[addrlen] = '\0'; 301 } 302 return APR_SUCCESS; 303} 304 305#if defined(HAVE_GETADDRINFO) 306 307static apr_status_t call_resolver(apr_sockaddr_t **sa, 308 const char *hostname, apr_int32_t family, 309 apr_port_t port, apr_int32_t flags, 310 apr_pool_t *p) 311{ 312 struct addrinfo hints, *ai, *ai_list; 313 apr_sockaddr_t *prev_sa; 314 int error; 315 char *servname = NULL; 316 317 memset(&hints, 0, sizeof(hints)); 318 hints.ai_family = family; 319 hints.ai_socktype = SOCK_STREAM; 320#ifdef HAVE_GAI_ADDRCONFIG 321 if (family == APR_UNSPEC) { 322 /* By default, only look up addresses using address types for 323 * which a local interface is configured, i.e. no IPv6 if no 324 * IPv6 interfaces configured. */ 325 hints.ai_flags = AI_ADDRCONFIG; 326 } 327#endif 328 if(hostname == NULL) { 329#ifdef AI_PASSIVE 330 /* If hostname is NULL, assume we are trying to bind to all 331 * interfaces. */ 332 hints.ai_flags |= AI_PASSIVE; 333#endif 334 /* getaddrinfo according to RFC 2553 must have either hostname 335 * or servname non-NULL. 336 */ 337#ifdef OSF1 338 /* The Tru64 5.0 getaddrinfo() can only resolve services given 339 * by the name listed in /etc/services; a numeric or unknown 340 * servname gets an EAI_SERVICE error. So just resolve the 341 * appropriate anyaddr and fill in the port later. */ 342 hostname = family == AF_INET6 ? "::" : "0.0.0.0"; 343 servname = NULL; 344#ifdef AI_NUMERICHOST 345 hints.ai_flags |= AI_NUMERICHOST; 346#endif 347#else 348#if AIX_SERVNAME_HACK 349 if (!port) { 350 servname = "1"; 351 } 352 else 353#endif /* AIX_SERVNAME_HACK */ 354 servname = apr_itoa(p, port); 355#endif /* OSF1 */ 356 } 357 error = getaddrinfo(hostname, servname, &hints, &ai_list); 358#ifdef HAVE_GAI_ADDRCONFIG 359 if (error == EAI_BADFLAGS && family == APR_UNSPEC) { 360 /* Retry with no flags if AI_ADDRCONFIG was rejected. */ 361 hints.ai_flags = 0; 362 error = getaddrinfo(hostname, servname, &hints, &ai_list); 363 } 364#endif 365 if (error) { 366#if defined(WIN32) 367 return apr_get_netos_error(); 368#else 369 if (error == EAI_SYSTEM) { 370 return errno; 371 } 372 else 373 { 374 /* issues with representing this with APR's error scheme: 375 * glibc uses negative values for these numbers, perhaps so 376 * they don't conflict with h_errno values... Tru64 uses 377 * positive values which conflict with h_errno values 378 */ 379#if defined(NEGATIVE_EAI) 380 error = -error; 381#endif 382 return error + APR_OS_START_EAIERR; 383 } 384#endif /* WIN32 */ 385 } 386 387 prev_sa = NULL; 388 ai = ai_list; 389 while (ai) { /* while more addresses to report */ 390 apr_sockaddr_t *new_sa; 391 392 /* Ignore anything bogus: getaddrinfo in some old versions of 393 * glibc will return AF_UNIX entries for APR_UNSPEC+AI_PASSIVE 394 * lookups. */ 395#if APR_HAVE_IPV6 396 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) { 397#else 398 if (ai->ai_family != AF_INET) { 399#endif 400 ai = ai->ai_next; 401 continue; 402 } 403 404 new_sa = apr_pcalloc(p, sizeof(apr_sockaddr_t)); 405 406 new_sa->pool = p; 407 memcpy(&new_sa->sa, ai->ai_addr, ai->ai_addrlen); 408 apr_sockaddr_vars_set(new_sa, ai->ai_family, port); 409 410 if (!prev_sa) { /* first element in new list */ 411 if (hostname) { 412 new_sa->hostname = apr_pstrdup(p, hostname); 413 } 414 *sa = new_sa; 415 } 416 else { 417 new_sa->hostname = prev_sa->hostname; 418 prev_sa->next = new_sa; 419 } 420 421 prev_sa = new_sa; 422 ai = ai->ai_next; 423 } 424 freeaddrinfo(ai_list); 425 return APR_SUCCESS; 426} 427 428static apr_status_t find_addresses(apr_sockaddr_t **sa, 429 const char *hostname, apr_int32_t family, 430 apr_port_t port, apr_int32_t flags, 431 apr_pool_t *p) 432{ 433 if (flags & APR_IPV4_ADDR_OK) { 434 apr_status_t error = call_resolver(sa, hostname, AF_INET, port, flags, p); 435 436#if APR_HAVE_IPV6 437 if (error) { 438 family = AF_INET6; /* try again */ 439 } 440 else 441#endif 442 return error; 443 } 444#if APR_HAVE_IPV6 445 else if (flags & APR_IPV6_ADDR_OK) { 446 apr_status_t error = call_resolver(sa, hostname, AF_INET6, port, flags, p); 447 448 if (error) { 449 family = AF_INET; /* try again */ 450 } 451 else { 452 return APR_SUCCESS; 453 } 454 } 455#endif 456 457 return call_resolver(sa, hostname, family, port, flags, p); 458} 459 460#else /* end of HAVE_GETADDRINFO code */ 461 462static apr_status_t find_addresses(apr_sockaddr_t **sa, 463 const char *hostname, apr_int32_t family, 464 apr_port_t port, apr_int32_t flags, 465 apr_pool_t *p) 466{ 467 struct hostent *hp; 468 apr_sockaddr_t *prev_sa; 469 int curaddr; 470#if APR_HAS_THREADS && !defined(GETHOSTBYNAME_IS_THREAD_SAFE) && \ 471 defined(HAVE_GETHOSTBYNAME_R) && !defined(BEOS) 472#ifdef GETHOSTBYNAME_R_HOSTENT_DATA 473 struct hostent_data hd; 474#else 475 /* If you see ERANGE, that means GETHOSBYNAME_BUFLEN needs to be 476 * bumped. */ 477 char tmp[GETHOSTBYNAME_BUFLEN]; 478#endif 479 int hosterror; 480#endif 481 struct hostent hs; 482 struct in_addr ipaddr; 483 char *addr_list[2]; 484 const char *orig_hostname = hostname; 485 486 if (hostname == NULL) { 487 /* if we are given a NULL hostname, assume '0.0.0.0' */ 488 hostname = "0.0.0.0"; 489 } 490 491 if (*hostname >= '0' && *hostname <= '9' && 492 strspn(hostname, "0123456789.") == strlen(hostname)) { 493 494 ipaddr.s_addr = inet_addr(hostname); 495 addr_list[0] = (char *)&ipaddr; 496 addr_list[1] = NULL; /* just one IP in list */ 497 hs.h_addr_list = (char **)addr_list; 498 hp = &hs; 499 } 500 else { 501#if APR_HAS_THREADS && !defined(GETHOSTBYNAME_IS_THREAD_SAFE) && \ 502 defined(HAVE_GETHOSTBYNAME_R) && !defined(BEOS) 503#if defined(GETHOSTBYNAME_R_HOSTENT_DATA) 504 /* AIX, HP/UX, D/UX et alia */ 505 gethostbyname_r(hostname, &hs, &hd); 506 hp = &hs; 507#else 508#if defined(GETHOSTBYNAME_R_GLIBC2) 509 /* Linux glibc2+ */ 510 gethostbyname_r(hostname, &hs, tmp, GETHOSTBYNAME_BUFLEN - 1, 511 &hp, &hosterror); 512#else 513 /* Solaris, Irix et alia */ 514 hp = gethostbyname_r(hostname, &hs, tmp, GETHOSTBYNAME_BUFLEN - 1, 515 &hosterror); 516#endif /* !defined(GETHOSTBYNAME_R_GLIBC2) */ 517 if (!hp) { 518 return (hosterror + APR_OS_START_SYSERR); 519 } 520#endif /* !defined(GETHOSTBYNAME_R_HOSTENT_DATA) */ 521#else 522 hp = gethostbyname(hostname); 523#endif 524 525 if (!hp) { 526#ifdef WIN32 527 return apr_get_netos_error(); 528#else 529 return (h_errno + APR_OS_START_SYSERR); 530#endif 531 } 532 } 533 534 prev_sa = NULL; 535 curaddr = 0; 536 while (hp->h_addr_list[curaddr]) { 537 apr_sockaddr_t *new_sa = apr_pcalloc(p, sizeof(apr_sockaddr_t)); 538 539 new_sa->pool = p; 540 new_sa->sa.sin.sin_addr = *(struct in_addr *)hp->h_addr_list[curaddr]; 541 apr_sockaddr_vars_set(new_sa, AF_INET, port); 542 543 if (!prev_sa) { /* first element in new list */ 544 if (orig_hostname) { 545 new_sa->hostname = apr_pstrdup(p, orig_hostname); 546 } 547 *sa = new_sa; 548 } 549 else { 550 new_sa->hostname = prev_sa->hostname; 551 prev_sa->next = new_sa; 552 } 553 554 prev_sa = new_sa; 555 ++curaddr; 556 } 557 558 return APR_SUCCESS; 559} 560 561#endif /* end of !HAVE_GETADDRINFO code */ 562 563APR_DECLARE(apr_status_t) apr_sockaddr_info_get(apr_sockaddr_t **sa, 564 const char *hostname, 565 apr_int32_t family, apr_port_t port, 566 apr_int32_t flags, apr_pool_t *p) 567{ 568 apr_int32_t masked; 569 *sa = NULL; 570 571 if ((masked = flags & (APR_IPV4_ADDR_OK | APR_IPV6_ADDR_OK))) { 572 if (!hostname || 573 family != APR_UNSPEC || 574 masked == (APR_IPV4_ADDR_OK | APR_IPV6_ADDR_OK)) { 575 return APR_EINVAL; 576 } 577#if !APR_HAVE_IPV6 578 if (flags & APR_IPV6_ADDR_OK) { 579 return APR_ENOTIMPL; 580 } 581#endif 582 } 583#if !APR_HAVE_IPV6 584 /* What may happen is that APR is not IPv6-enabled, but we're still 585 * going to call getaddrinfo(), so we have to tell the OS we only 586 * want IPv4 addresses back since we won't know what to do with 587 * IPv6 addresses. 588 */ 589 if (family == APR_UNSPEC) { 590 family = APR_INET; 591 } 592#endif 593 594 return find_addresses(sa, hostname, family, port, flags, p); 595} 596 597APR_DECLARE(apr_status_t) apr_getnameinfo(char **hostname, 598 apr_sockaddr_t *sockaddr, 599 apr_int32_t flags) 600{ 601#if defined(HAVE_GETNAMEINFO) 602 int rc; 603#if defined(NI_MAXHOST) 604 char tmphostname[NI_MAXHOST]; 605#else 606 char tmphostname[256]; 607#endif 608 609 /* don't know if it is portable for getnameinfo() to set h_errno; 610 * clear it then see if it was set */ 611 SET_H_ERRNO(0); 612 613 /* default flags are NI_NAMREQD; otherwise, getnameinfo() will return 614 * a numeric address string if it fails to resolve the host name; 615 * that is *not* what we want here 616 * 617 * For IPv4-mapped IPv6 addresses, drop down to IPv4 before calling 618 * getnameinfo() to avoid getnameinfo bugs (MacOS X, glibc). 619 */ 620#if APR_HAVE_IPV6 621 if (sockaddr->family == AF_INET6 && 622 IN6_IS_ADDR_V4MAPPED(&sockaddr->sa.sin6.sin6_addr)) { 623 struct sockaddr_in tmpsa; 624 tmpsa.sin_family = AF_INET; 625 tmpsa.sin_port = 0; 626 tmpsa.sin_addr.s_addr = ((apr_uint32_t *)sockaddr->ipaddr_ptr)[3]; 627#ifdef SIN6_LEN 628 tmpsa.sin_len = sizeof(tmpsa); 629#endif 630 631 rc = getnameinfo((const struct sockaddr *)&tmpsa, sizeof(tmpsa), 632 tmphostname, sizeof(tmphostname), NULL, 0, 633 flags != 0 ? flags : NI_NAMEREQD); 634 } 635 else 636#endif 637 rc = getnameinfo((const struct sockaddr *)&sockaddr->sa, sockaddr->salen, 638 tmphostname, sizeof(tmphostname), NULL, 0, 639 flags != 0 ? flags : NI_NAMEREQD); 640 if (rc != 0) { 641 *hostname = NULL; 642 643#ifndef WIN32 644 /* something went wrong. Look at the EAI_ error code */ 645 if (rc == EAI_SYSTEM) { 646 /* EAI_SYSTEM System error returned in errno. */ 647 /* IMHO, Implementations that set h_errno a simply broken. */ 648 if (h_errno) { /* for broken implementations which set h_errno */ 649 return h_errno + APR_OS_START_SYSERR; 650 } 651 else { /* "normal" case */ 652 return errno + APR_OS_START_SYSERR; 653 } 654 } 655 else 656#endif 657 { 658#if defined(NEGATIVE_EAI) 659 if (rc < 0) rc = -rc; 660#endif 661 return rc + APR_OS_START_EAIERR; /* return the EAI_ error */ 662 } 663 } 664 *hostname = sockaddr->hostname = apr_pstrdup(sockaddr->pool, 665 tmphostname); 666 return APR_SUCCESS; 667#else 668#if APR_HAS_THREADS && !defined(GETHOSTBYADDR_IS_THREAD_SAFE) && \ 669 defined(HAVE_GETHOSTBYADDR_R) && !defined(BEOS) 670#ifdef GETHOSTBYNAME_R_HOSTENT_DATA 671 struct hostent_data hd; 672#else 673 char tmp[GETHOSTBYNAME_BUFLEN]; 674#endif 675 int hosterror; 676 struct hostent hs, *hptr; 677 678#if defined(GETHOSTBYNAME_R_HOSTENT_DATA) 679 /* AIX, HP/UX, D/UX et alia */ 680 gethostbyaddr_r((char *)&sockaddr->sa.sin.sin_addr, 681 sizeof(struct in_addr), AF_INET, &hs, &hd); 682 hptr = &hs; 683#else 684#if defined(GETHOSTBYNAME_R_GLIBC2) 685 /* Linux glibc2+ */ 686 gethostbyaddr_r((char *)&sockaddr->sa.sin.sin_addr, 687 sizeof(struct in_addr), AF_INET, 688 &hs, tmp, GETHOSTBYNAME_BUFLEN - 1, &hptr, &hosterror); 689#else 690 /* Solaris, Irix et alia */ 691 hptr = gethostbyaddr_r((char *)&sockaddr->sa.sin.sin_addr, 692 sizeof(struct in_addr), AF_INET, 693 &hs, tmp, GETHOSTBYNAME_BUFLEN, &hosterror); 694#endif /* !defined(GETHOSTBYNAME_R_GLIBC2) */ 695 if (!hptr) { 696 *hostname = NULL; 697 return hosterror + APR_OS_START_SYSERR; 698 } 699#endif /* !defined(GETHOSTBYNAME_R_HOSTENT_DATA) */ 700#else 701 struct hostent *hptr; 702 hptr = gethostbyaddr((char *)&sockaddr->sa.sin.sin_addr, 703 sizeof(struct in_addr), AF_INET); 704#endif 705 706 if (hptr) { 707 *hostname = sockaddr->hostname = apr_pstrdup(sockaddr->pool, hptr->h_name); 708 return APR_SUCCESS; 709 } 710 *hostname = NULL; 711#if defined(WIN32) 712 return apr_get_netos_error(); 713#elif defined(OS2) 714 return h_errno; 715#else 716 return h_errno + APR_OS_START_SYSERR; 717#endif 718#endif 719} 720 721APR_DECLARE(apr_status_t) apr_getservbyname(apr_sockaddr_t *sockaddr, 722 const char *servname) 723{ 724#if APR_HAS_THREADS && !defined(GETSERVBYNAME_IS_THREAD_SAFE) && \ 725 defined(HAVE_GETSERVBYNAME_R) && \ 726 (defined(GETSERVBYNAME_R_GLIBC2) || defined(GETSERVBYNAME_R_SOLARIS) || \ 727 defined(GETSERVBYNAME_R_OSF1)) 728 struct servent se; 729#if defined(GETSERVBYNAME_R_OSF1) 730 struct servent_data sed; 731 732 memset(&sed, 0, sizeof(sed)); /* must zero fill before use */ 733#else 734#if defined(GETSERVBYNAME_R_GLIBC2) 735 struct servent *res; 736#endif 737 char buf[1024]; 738#endif 739#else 740 struct servent *se; 741#endif 742 743 if (servname == NULL) 744 return APR_EINVAL; 745 746#if APR_HAS_THREADS && !defined(GETSERVBYNAME_IS_THREAD_SAFE) && \ 747 defined(HAVE_GETSERVBYNAME_R) && \ 748 (defined(GETSERVBYNAME_R_GLIBC2) || defined(GETSERVBYNAME_R_SOLARIS) || \ 749 defined(GETSERVBYNAME_R_OSF1)) 750#if defined(GETSERVBYNAME_R_GLIBC2) 751 if (getservbyname_r(servname, NULL, 752 &se, buf, sizeof(buf), &res) == 0 && res != NULL) { 753 sockaddr->port = ntohs(res->s_port); 754 sockaddr->servname = apr_pstrdup(sockaddr->pool, servname); 755 sockaddr->sa.sin.sin_port = res->s_port; 756 return APR_SUCCESS; 757 } 758#elif defined(GETSERVBYNAME_R_SOLARIS) 759 if (getservbyname_r(servname, NULL, &se, buf, sizeof(buf)) != NULL) { 760 sockaddr->port = ntohs(se.s_port); 761 sockaddr->servname = apr_pstrdup(sockaddr->pool, servname); 762 sockaddr->sa.sin.sin_port = se.s_port; 763 return APR_SUCCESS; 764 } 765#elif defined(GETSERVBYNAME_R_OSF1) 766 if (getservbyname_r(servname, NULL, &se, &sed) == 0) { 767 sockaddr->port = ntohs(se.s_port); 768 sockaddr->servname = apr_pstrdup(sockaddr->pool, servname); 769 sockaddr->sa.sin.sin_port = se.s_port; 770 return APR_SUCCESS; 771 } 772#endif 773#else 774 if ((se = getservbyname(servname, NULL)) != NULL){ 775 sockaddr->port = ntohs(se->s_port); 776 sockaddr->servname = apr_pstrdup(sockaddr->pool, servname); 777 sockaddr->sa.sin.sin_port = se->s_port; 778 return APR_SUCCESS; 779 } 780#endif 781 return APR_ENOENT; 782} 783 784#define V4MAPPED_EQUAL(a,b) \ 785((a)->sa.sin.sin_family == AF_INET && \ 786 (b)->sa.sin.sin_family == AF_INET6 && \ 787 IN6_IS_ADDR_V4MAPPED((struct in6_addr *)(b)->ipaddr_ptr) && \ 788 !memcmp((a)->ipaddr_ptr, \ 789 &((struct in6_addr *)(b)->ipaddr_ptr)->s6_addr[12], \ 790 (a)->ipaddr_len)) 791 792APR_DECLARE(int) apr_sockaddr_equal(const apr_sockaddr_t *addr1, 793 const apr_sockaddr_t *addr2) 794{ 795 if (addr1->ipaddr_len == addr2->ipaddr_len && 796 !memcmp(addr1->ipaddr_ptr, addr2->ipaddr_ptr, addr1->ipaddr_len)) { 797 return 1; 798 } 799#if APR_HAVE_IPV6 800 if (V4MAPPED_EQUAL(addr1, addr2)) { 801 return 1; 802 } 803 if (V4MAPPED_EQUAL(addr2, addr1)) { 804 return 1; 805 } 806#endif 807 return 0; /* not equal */ 808} 809 810static apr_status_t parse_network(apr_ipsubnet_t *ipsub, const char *network) 811{ 812 /* legacy syntax for ip addrs: a.b.c. ==> a.b.c.0/24 for example */ 813 int shift; 814 char *s, *t; 815 int octet; 816 char buf[sizeof "255.255.255.255"]; 817 818 if (strlen(network) < sizeof buf) { 819 strcpy(buf, network); 820 } 821 else { 822 return APR_EBADIP; 823 } 824 825 /* parse components */ 826 s = buf; 827 ipsub->sub[0] = 0; 828 ipsub->mask[0] = 0; 829 shift = 24; 830 while (*s) { 831 t = s; 832 if (!apr_isdigit(*t)) { 833 return APR_EBADIP; 834 } 835 while (apr_isdigit(*t)) { 836 ++t; 837 } 838 if (*t == '.') { 839 *t++ = 0; 840 } 841 else if (*t) { 842 return APR_EBADIP; 843 } 844 if (shift < 0) { 845 return APR_EBADIP; 846 } 847 octet = atoi(s); 848 if (octet < 0 || octet > 255) { 849 return APR_EBADIP; 850 } 851 ipsub->sub[0] |= octet << shift; 852 ipsub->mask[0] |= 0xFFUL << shift; 853 s = t; 854 shift -= 8; 855 } 856 ipsub->sub[0] = ntohl(ipsub->sub[0]); 857 ipsub->mask[0] = ntohl(ipsub->mask[0]); 858 ipsub->family = AF_INET; 859 return APR_SUCCESS; 860} 861 862/* return values: 863 * APR_EINVAL not an IP address; caller should see if it is something else 864 * APR_BADIP IP address portion is is not valid 865 * APR_BADMASK mask portion is not valid 866 */ 867 868static apr_status_t parse_ip(apr_ipsubnet_t *ipsub, const char *ipstr, int network_allowed) 869{ 870 /* supported flavors of IP: 871 * 872 * . IPv6 numeric address string (e.g., "fe80::1") 873 * 874 * IMPORTANT: Don't store IPv4-mapped IPv6 address as an IPv6 address. 875 * 876 * . IPv4 numeric address string (e.g., "127.0.0.1") 877 * 878 * . IPv4 network string (e.g., "9.67") 879 * 880 * IMPORTANT: This network form is only allowed if network_allowed is on. 881 */ 882 int rc; 883 884#if APR_HAVE_IPV6 885 rc = apr_inet_pton(AF_INET6, ipstr, ipsub->sub); 886 if (rc == 1) { 887 if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)ipsub->sub)) { 888 /* apr_ipsubnet_test() assumes that we don't create IPv4-mapped IPv6 889 * addresses; this of course forces the user to specify IPv4 addresses 890 * in a.b.c.d style instead of ::ffff:a.b.c.d style. 891 */ 892 return APR_EBADIP; 893 } 894 ipsub->family = AF_INET6; 895 } 896 else 897#endif 898 { 899 rc = apr_inet_pton(AF_INET, ipstr, ipsub->sub); 900 if (rc == 1) { 901 ipsub->family = AF_INET; 902 } 903 } 904 if (rc != 1) { 905 if (network_allowed) { 906 return parse_network(ipsub, ipstr); 907 } 908 else { 909 return APR_EBADIP; 910 } 911 } 912 return APR_SUCCESS; 913} 914 915static int looks_like_ip(const char *ipstr) 916{ 917 if (strchr(ipstr, ':')) { 918 /* definitely not a hostname; assume it is intended to be an IPv6 address */ 919 return 1; 920 } 921 922 /* simple IPv4 address string check */ 923 while ((*ipstr == '.') || apr_isdigit(*ipstr)) 924 ipstr++; 925 return (*ipstr == '\0'); 926} 927 928static void fix_subnet(apr_ipsubnet_t *ipsub) 929{ 930 /* in case caller specified more bits in network address than are 931 * valid according to the mask, turn off the extra bits 932 */ 933 int i; 934 935 for (i = 0; i < sizeof ipsub->mask / sizeof(apr_int32_t); i++) { 936 ipsub->sub[i] &= ipsub->mask[i]; 937 } 938} 939 940/* be sure not to store any IPv4 address as a v4-mapped IPv6 address */ 941APR_DECLARE(apr_status_t) apr_ipsubnet_create(apr_ipsubnet_t **ipsub, const char *ipstr, 942 const char *mask_or_numbits, apr_pool_t *p) 943{ 944 apr_status_t rv; 945 char *endptr; 946 long bits, maxbits = 32; 947 948 /* filter out stuff which doesn't look remotely like an IP address; this helps 949 * callers like mod_access which have a syntax allowing hostname or IP address; 950 * APR_EINVAL tells the caller that it was probably not intended to be an IP 951 * address 952 */ 953 if (!looks_like_ip(ipstr)) { 954 return APR_EINVAL; 955 } 956 957 *ipsub = apr_pcalloc(p, sizeof(apr_ipsubnet_t)); 958 959 /* assume ipstr is an individual IP address, not a subnet */ 960 memset((*ipsub)->mask, 0xFF, sizeof (*ipsub)->mask); 961 962 rv = parse_ip(*ipsub, ipstr, mask_or_numbits == NULL); 963 if (rv != APR_SUCCESS) { 964 return rv; 965 } 966 967 if (mask_or_numbits) { 968#if APR_HAVE_IPV6 969 if ((*ipsub)->family == AF_INET6) { 970 maxbits = 128; 971 } 972#endif 973 bits = strtol(mask_or_numbits, &endptr, 10); 974 if (*endptr == '\0' && bits > 0 && bits <= maxbits) { 975 /* valid num-bits string; fill in mask appropriately */ 976 int cur_entry = 0; 977 apr_int32_t cur_bit_value; 978 979 memset((*ipsub)->mask, 0, sizeof (*ipsub)->mask); 980 while (bits > 32) { 981 (*ipsub)->mask[cur_entry] = 0xFFFFFFFF; /* all 32 bits */ 982 bits -= 32; 983 ++cur_entry; 984 } 985 cur_bit_value = 0x80000000; 986 while (bits) { 987 (*ipsub)->mask[cur_entry] |= cur_bit_value; 988 --bits; 989 cur_bit_value /= 2; 990 } 991 (*ipsub)->mask[cur_entry] = htonl((*ipsub)->mask[cur_entry]); 992 } 993 else if (apr_inet_pton(AF_INET, mask_or_numbits, (*ipsub)->mask) == 1 && 994 (*ipsub)->family == AF_INET) { 995 /* valid IPv4 netmask */ 996 } 997 else { 998 return APR_EBADMASK; 999 } 1000 } 1001 1002 fix_subnet(*ipsub); 1003 1004 return APR_SUCCESS; 1005} 1006 1007APR_DECLARE(int) apr_ipsubnet_test(apr_ipsubnet_t *ipsub, apr_sockaddr_t *sa) 1008{ 1009#if APR_HAVE_IPV6 1010 /* XXX This line will segv on Win32 build with APR_HAVE_IPV6, 1011 * but without the IPV6 drivers installed. 1012 */ 1013 if (sa->sa.sin.sin_family == AF_INET) { 1014 if (ipsub->family == AF_INET && 1015 ((sa->sa.sin.sin_addr.s_addr & ipsub->mask[0]) == ipsub->sub[0])) { 1016 return 1; 1017 } 1018 } 1019 else if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)sa->ipaddr_ptr)) { 1020 if (ipsub->family == AF_INET && 1021 (((apr_uint32_t *)sa->ipaddr_ptr)[3] & ipsub->mask[0]) == ipsub->sub[0]) { 1022 return 1; 1023 } 1024 } 1025 else { 1026 apr_uint32_t *addr = (apr_uint32_t *)sa->ipaddr_ptr; 1027 1028 if ((addr[0] & ipsub->mask[0]) == ipsub->sub[0] && 1029 (addr[1] & ipsub->mask[1]) == ipsub->sub[1] && 1030 (addr[2] & ipsub->mask[2]) == ipsub->sub[2] && 1031 (addr[3] & ipsub->mask[3]) == ipsub->sub[3]) { 1032 return 1; 1033 } 1034 } 1035#else 1036 if ((sa->sa.sin.sin_addr.s_addr & ipsub->mask[0]) == ipsub->sub[0]) { 1037 return 1; 1038 } 1039#endif /* APR_HAVE_IPV6 */ 1040 return 0; /* no match */ 1041} 1042