Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: curl-7_19_5
Fetching contributors…

Cannot retrieve contributors at this time

file 487 lines (409 sloc) 12.575 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/

#include "setup.h"

#include <curl/curl.h>

#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif

#ifdef VMS
# include <in.h>
# include <inet.h>
# include <stdlib.h>
#endif

#if defined(NETWARE) && defined(__NOVELL_LIBC__)
# undef in_addr_t
# define in_addr_t unsigned long
#endif

#include "curl_addrinfo.h"

#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>

#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"


/*
* Curl_freeaddrinfo()
*
* This is used to free a linked list of Curl_addrinfo structs along
* with all its associated allocated storage. This function should be
* called once for each successful call to Curl_getaddrinfo_ex() or to
* any function call which actually allocates a Curl_addrinfo struct.
*/

#if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
  /* workaround icc 9.1 optimizer issue */
# define vqualifier volatile
#else
# define vqualifier
#endif

void
Curl_freeaddrinfo(Curl_addrinfo *cahead)
{
  Curl_addrinfo *vqualifier canext;
  Curl_addrinfo *ca;

  for(ca = cahead; ca != NULL; ca = canext) {

    if(ca->ai_addr)
      free(ca->ai_addr);

    if(ca->ai_canonname)
      free(ca->ai_canonname);

    canext = ca->ai_next;

    free(ca);
  }
}


#ifdef HAVE_GETADDRINFO
/*
* Curl_getaddrinfo_ex()
*
* This is a wrapper function around system's getaddrinfo(), with
* the only difference that instead of returning a linked list of
* addrinfo structs this one returns a linked list of Curl_addrinfo
* ones. The memory allocated by this function *MUST* be free'd with
* Curl_freeaddrinfo(). For each successful call to this function
* there must be an associated call later to Curl_freeaddrinfo().
*
* There should be no single call to system's getaddrinfo() in the
* whole library, any such call should be 'routed' through this one.
*/

int
Curl_getaddrinfo_ex(const char *nodename,
                    const char *servname,
                    const struct addrinfo *hints,
                    Curl_addrinfo **result)
{
  const struct addrinfo *ainext;
  const struct addrinfo *ai;
  struct addrinfo *aihead;
  Curl_addrinfo *cafirst = NULL;
  Curl_addrinfo *calast = NULL;
  Curl_addrinfo *ca;
  int error;

  *result = NULL; /* assume failure */

  error = getaddrinfo(nodename, servname, hints, &aihead);
  if(error)
    return error;

  for(ai = aihead; ai != NULL; ai = ainext) {

    if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
      error = EAI_MEMORY;
      break;
    }

    /* copy each structure member individually, member ordering, */
    /* size, or padding might be different for each structure. */

    ca->ai_flags = ai->ai_flags;
    ca->ai_family = ai->ai_family;
    ca->ai_socktype = ai->ai_socktype;
    ca->ai_protocol = ai->ai_protocol;
    ca->ai_addrlen = 0;
    ca->ai_addr = NULL;
    ca->ai_canonname = NULL;
    ca->ai_next = NULL;

    if((ai->ai_addrlen > 0) && (ai->ai_addr != NULL)) {
      ca->ai_addrlen = ai->ai_addrlen;
      if((ca->ai_addr = malloc(ca->ai_addrlen)) == NULL) {
        error = EAI_MEMORY;
        free(ca);
        break;
      }
      memcpy(ca->ai_addr, ai->ai_addr, ca->ai_addrlen);
    }

    if(ai->ai_canonname != NULL) {
      if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
        error = EAI_MEMORY;
        if(ca->ai_addr)
          free(ca->ai_addr);
        free(ca);
        break;
      }
    }

    /* if the return list is empty, this becomes the first element */
    if(!cafirst)
      cafirst = ca;

    /* add this element last in the return list */
    if(calast)
      calast->ai_next = ca;
    calast = ca;

    /* fetch next element fom the addrinfo list */
    ainext = ai->ai_next;
  }

  /* destroy the addrinfo list */
  if(aihead)
    freeaddrinfo(aihead);

  /* if we failed, also destroy the Curl_addrinfo list */
  if(error) {
    Curl_freeaddrinfo(cafirst);
    cafirst = NULL;
  }

  *result = cafirst;

  /* This is not a CURLcode */
  return error;
}
#endif /* HAVE_GETADDRINFO */


/*
* Curl_he2ai()
*
* This function returns a pointer to the first element of a newly allocated
* Curl_addrinfo struct linked list filled with the data of a given hostent.
* Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
* stack, but usable also for IPv4, all hosts and environments.
*
* The memory allocated by this function *MUST* be free'd later on calling
* Curl_freeaddrinfo(). For each successful call to this function there
* must be an associated call later to Curl_freeaddrinfo().
*
* Curl_addrinfo defined in "lib/curl_addrinfo.h"
*
* struct Curl_addrinfo {
* int ai_flags;
* int ai_family;
* int ai_socktype;
* int ai_protocol;
* curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
* char *ai_canonname;
* struct sockaddr *ai_addr;
* struct Curl_addrinfo *ai_next;
* };
* typedef struct Curl_addrinfo Curl_addrinfo;
*
* hostent defined in <netdb.h>
*
* struct hostent {
* char *h_name;
* char **h_aliases;
* int h_addrtype;
* int h_length;
* char **h_addr_list;
* };
*
* for backward compatibility:
*
* #define h_addr h_addr_list[0]
*/

Curl_addrinfo *
Curl_he2ai(const struct hostent *he, int port)
{
  Curl_addrinfo *ai;
  Curl_addrinfo *prevai = NULL;
  Curl_addrinfo *firstai = NULL;
  struct sockaddr_in *addr;
#ifdef ENABLE_IPV6
  struct sockaddr_in6 *addr6;
#endif
  CURLcode result = CURLE_OK;
  int i;
  char *curr;

  if(!he)
    /* no input == no output! */
    return NULL;

  DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));

  for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {

    size_t ss_size;
#ifdef ENABLE_IPV6
    if (he->h_addrtype == AF_INET6)
      ss_size = sizeof (struct sockaddr_in6);
    else
#endif
      ss_size = sizeof (struct sockaddr_in);

    if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
      result = CURLE_OUT_OF_MEMORY;
      break;
    }
    if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
      result = CURLE_OUT_OF_MEMORY;
      free(ai);
      break;
    }
    if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
      result = CURLE_OUT_OF_MEMORY;
      free(ai->ai_canonname);
      free(ai);
      break;
    }

    if(!firstai)
      /* store the pointer we want to return from this function */
      firstai = ai;

    if(prevai)
      /* make the previous entry point to this */
      prevai->ai_next = ai;

    ai->ai_family = he->h_addrtype;

    /* we return all names as STREAM, so when using this address for TFTP
the type must be ignored and conn->socktype be used instead! */
    ai->ai_socktype = SOCK_STREAM;

    ai->ai_addrlen = (curl_socklen_t)ss_size;

    /* leave the rest of the struct filled with zero */

    switch (ai->ai_family) {
    case AF_INET:
      addr = (void *)ai->ai_addr; /* storage area for this info */

      memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
      addr->sin_family = (unsigned short)(he->h_addrtype);
      addr->sin_port = htons((unsigned short)port);
      break;

#ifdef ENABLE_IPV6
    case AF_INET6:
      addr6 = (void *)ai->ai_addr; /* storage area for this info */

      memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
      addr6->sin6_family = (unsigned short)(he->h_addrtype);
      addr6->sin6_port = htons((unsigned short)port);
      break;
#endif
    }

    prevai = ai;
  }

  if(result != CURLE_OK) {
    Curl_freeaddrinfo(firstai);
    firstai = NULL;
  }

  return firstai;
}


struct namebuff {
  struct hostent hostentry;
  union {
    struct in_addr ina4;
#ifdef ENABLE_IPV6
    struct in6_addr ina6;
#endif
  } addrentry;
  char *h_addr_list[2];
};


/*
* Curl_ip2addr()
*
* This function takes an internet address, in binary form, as input parameter
* along with its address family and the string version of the address, and it
* returns a Curl_addrinfo chain filled in correctly with information for the
* given address/host
*/

Curl_addrinfo *
Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
{
  Curl_addrinfo *ai;

#if defined(VMS) && \
defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
#pragma pointer_size save
#pragma pointer_size short
#pragma message disable PTRMISMATCH
#endif

  struct hostent *h;
  struct namebuff *buf;
  char *addrentry;
  char *hoststr;
  size_t addrsize;

  DEBUGASSERT(inaddr && hostname);

  buf = malloc(sizeof(struct namebuff));
  if(!buf)
    return NULL;

  hoststr = strdup(hostname);
  if(!hoststr) {
    free(buf);
    return NULL;
  }

  switch(af) {
  case AF_INET:
    addrsize = sizeof(struct in_addr);
    addrentry = (void *)&buf->addrentry.ina4;
    memcpy(addrentry, inaddr, sizeof(struct in_addr));
    break;
#ifdef ENABLE_IPV6
  case AF_INET6:
    addrsize = sizeof(struct in6_addr);
    addrentry = (void *)&buf->addrentry.ina6;
    memcpy(addrentry, inaddr, sizeof(struct in6_addr));
    break;
#endif
  default:
    free(hoststr);
    free(buf);
    return NULL;
  }

  h = &buf->hostentry;
  h->h_name = hoststr;
  h->h_aliases = NULL;
  h->h_addrtype = (short)af;
  h->h_length = (short)addrsize;
  h->h_addr_list = &buf->h_addr_list[0];
  h->h_addr_list[0] = addrentry;
  h->h_addr_list[1] = NULL; /* terminate list of entries */

#if defined(VMS) && \
defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
#pragma pointer_size restore
#pragma message enable PTRMISMATCH
#endif

  ai = Curl_he2ai(h, port);

  free(hoststr);
  free(buf);

  return ai;
}


#if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
/*
* curl_dofreeaddrinfo()
*
* This is strictly for memory tracing and are using the same style as the
* family otherwise present in memdebug.c. I put these ones here since they
* require a bunch of structs I didn't wanna include in memdebug.c
*/

void
curl_dofreeaddrinfo(struct addrinfo *freethis,
                    int line, const char *source)
{
  (freeaddrinfo)(freethis);
  if(logfile)
    fprintf(logfile, "ADDR %s:%d freeaddrinfo(%p)\n",
            source, line, (void *)freethis);
}
#endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */


#if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
/*
* curl_dogetaddrinfo()
*
* This is strictly for memory tracing and are using the same style as the
* family otherwise present in memdebug.c. I put these ones here since they
* require a bunch of structs I didn't wanna include in memdebug.c
*/

int
curl_dogetaddrinfo(const char *hostname,
                   const char *service,
                   const struct addrinfo *hints,
                   struct addrinfo **result,
                   int line, const char *source)
{
  int res=(getaddrinfo)(hostname, service, hints, result);
  if(0 == res) {
    /* success */
    if(logfile)
      fprintf(logfile, "ADDR %s:%d getaddrinfo() = %p\n",
              source, line, (void *)*result);
  }
  else {
    if(logfile)
      fprintf(logfile, "ADDR %s:%d getaddrinfo() failed\n",
              source, line);
  }
  return res;
}
#endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
Something went wrong with that request. Please try again.