curl/tests/libtest/lib1502.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2012, 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.
 *
 ***************************************************************************/
/*
 * Test case converted from bug report #3575448, identifying a memory leak in
 * the CURLOPT_RESOLVE handling with the multi interface.
 */

#include "test.h"

#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif

int test(char *URL)
{
  CURL *ehandle;
  CURLM *multi_handle;
  char redirect[160];
  CURLcode result = CURLE_NOT_BUILT_IN;
  int still_running; /* keep number of running handles */

  CURLMsg *msg; /* for picking up messages with the transfer status */
  int msgs_left; /* how many messages are left */

  /* DNS cache injection */
  struct curl_slist *dns_cache_list;

  sprintf(redirect, "google.com:%s:%s", libtest_arg2, libtest_arg3);

  fprintf(stderr, "Redirect: %s\n", redirect);

  dns_cache_list = curl_slist_append(NULL, redirect);

  /* Allocate one CURL handle per transfer */
  ehandle = curl_easy_init();

  /* set the options (I left out a few, you'll get the point anyway) */
  curl_easy_setopt(ehandle, CURLOPT_URL, URL);
  curl_easy_setopt(ehandle, CURLOPT_HEADER, 1L);

  curl_easy_setopt(ehandle, CURLOPT_RESOLVE, dns_cache_list);

  /* init a multi stack */
  multi_handle = curl_multi_init();

  /* add the individual transfers */
  curl_multi_add_handle(multi_handle, ehandle);

  /* we start some action by calling perform right away */
  curl_multi_perform(multi_handle, &still_running);

  do {
    struct timeval timeout;
    int rc; /* select() return code */

    fd_set fdread;
    fd_set fdwrite;
    fd_set fdexcep;
    int maxfd = -1;

    long curl_timeo = -1;

    FD_ZERO(&fdread);
    FD_ZERO(&fdwrite);
    FD_ZERO(&fdexcep);

    /* set a suitable timeout to play around with */
    timeout.tv_sec = 1;
    timeout.tv_usec = 0;

    curl_multi_timeout(multi_handle, &curl_timeo);
    if(curl_timeo >= 0) {
      int itimeout = (curl_timeo > (long)INT_MAX) ? INT_MAX : (int)curl_timeo;
      timeout.tv_sec = itimeout / 1000;
      if(timeout.tv_sec > 1)
        timeout.tv_sec = 1;
      else
        timeout.tv_usec = (itimeout % 1000) * 1000;
    }

    /* get file descriptors from the transfers */
    curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);

    /* In a real-world program you OF COURSE check the return code of the
       function calls.  On success, the value of maxfd is guaranteed to be
       greater or equal than -1.  We call select(maxfd + 1, ...), specially in
       case of (maxfd == -1), we call select(0, ...), which is basically equal
       to sleep. */

    rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);

    switch(rc) {
    case -1:
      /* select error */
      break;
    case 0: /* timeout */
    default: /* action */
      curl_multi_perform(multi_handle, &still_running);
      break;
    }
  } while(still_running);

  /* See how the transfers went */
  while ((msg = curl_multi_info_read(multi_handle, &msgs_left))) {
    if (msg->msg == CURLMSG_DONE)
      result = msg->data.result;
  }

  curl_multi_cleanup(multi_handle);

  /* Free the CURL handles */
  curl_easy_cleanup(ehandle);

  curl_slist_free_all(dns_cache_list);

  return (int)result;
}