aboutsummaryrefslogtreecommitdiff
path: root/lib/easy.c
blob: 018aeab6e4f7da2ed192dafc8c57e53ef825bad8 (plain)
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
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2008, 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"

/* -- WIN32 approved -- */
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>

#include "strequal.h"

#ifdef WIN32
#include <time.h>
#include <io.h>
#else
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#include <signal.h>

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#endif  /* WIN32 ... */

#include "urldata.h"
#include <curl/curl.h>
#include "transfer.h"
#include "sslgen.h"
#include "url.h"
#include "getinfo.h"
#include "hostip.h"
#include "share.h"
#include "strdup.h"
#include "memory.h"
#include "progress.h"
#include "easyif.h"
#include "select.h"
#include "sendf.h" /* for failf function prototype */
#include <ca-bundle.h>

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

#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
#include <iconv.h>
/* set default codesets for iconv */
#ifndef CURL_ICONV_CODESET_OF_NETWORK
#define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
#endif
#ifndef CURL_ICONV_CODESET_FOR_UTF8
#define CURL_ICONV_CODESET_FOR_UTF8   "UTF-8"
#endif
#define ICONV_ERROR  (size_t)-1
#endif /* CURL_DOES_CONVERSIONS && HAVE_ICONV */

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

#ifdef USE_WINSOCK
/* win32_cleanup() is for win32 socket cleanup functionality, the opposite
   of win32_init() */
static void win32_cleanup(void)
{
  WSACleanup();
}

/* win32_init() performs win32 socket initialization to properly setup the
   stack to allow networking */
static CURLcode win32_init(void)
{
  WORD wVersionRequested;
  WSADATA wsaData;
  int err;

#if defined(ENABLE_IPV6) && (USE_WINSOCK < 2)
  Error IPV6_requires_winsock2
#endif

  wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);

  err = WSAStartup(wVersionRequested, &wsaData);

  if(err != 0)
    /* Tell the user that we couldn't find a useable */
    /* winsock.dll.     */
    return CURLE_FAILED_INIT;

  /* Confirm that the Windows Sockets DLL supports what we need.*/
  /* Note that if the DLL supports versions greater */
  /* than wVersionRequested, it will still return */
  /* wVersionRequested in wVersion. wHighVersion contains the */
  /* highest supported version. */

  if( LOBYTE( wsaData.wVersion ) != LOBYTE(wVersionRequested) ||
       HIBYTE( wsaData.wVersion ) != HIBYTE(wVersionRequested) ) {
    /* Tell the user that we couldn't find a useable */

    /* winsock.dll. */
    WSACleanup();
    return CURLE_FAILED_INIT;
  }
  /* The Windows Sockets DLL is acceptable. Proceed. */
  return CURLE_OK;
}

#else
/* These functions exist merely to prevent compiler warnings */
static CURLcode win32_init(void) { return CURLE_OK; }
static void win32_cleanup(void) { }
#endif

#ifdef USE_LIBIDN
/*
 * Initialise use of IDNA library.
 * It falls back to ASCII if $CHARSET isn't defined. This doesn't work for
 * idna_to_ascii_lz().
 */
static void idna_init (void)
{
#ifdef WIN32
  char buf[60];
  UINT cp = GetACP();

  if(!getenv("CHARSET") && cp > 0) {
    snprintf(buf, sizeof(buf), "CHARSET=cp%u", cp);
    putenv(buf);
  }
#else
  /* to do? */
#endif
}
#endif  /* USE_LIBIDN */

/* true globals -- for curl_global_init() and curl_global_cleanup() */
static unsigned int  initialized;
static long          init_flags;

/*
 * strdup (and other memory functions) is redefined in complicated
 * ways, but at this point it must be defined as the system-supplied strdup
 * so the callback pointer is initialized correctly.
 */
#if defined(_WIN32_WCE)
#define system_strdup _strdup
#elif !defined(HAVE_STRDUP)
#define system_strdup curlx_strdup
#else
#define system_strdup strdup
#endif

/*
 * If a memory-using function (like curl_getenv) is used before
 * curl_global_init() is called, we need to have these pointers set already.
 */

curl_malloc_callback Curl_cmalloc = (curl_malloc_callback)malloc;
curl_free_callback Curl_cfree = (curl_free_callback)free;
curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)system_strdup;
curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;

/**
 * curl_global_init() globally initializes cURL given a bitwise set of the
 * different features of what to initialize.
 */
CURLcode curl_global_init(long flags)
{
  if(initialized++)
    return CURLE_OK;

  /* Setup the default memory functions here (again) */
  Curl_cmalloc = (curl_malloc_callback)malloc;
  Curl_cfree = (curl_free_callback)free;
  Curl_crealloc = (curl_realloc_callback)realloc;
  Curl_cstrdup = (curl_strdup_callback)system_strdup;
  Curl_ccalloc = (curl_calloc_callback)calloc;

  if(flags & CURL_GLOBAL_SSL)
    if(!Curl_ssl_init()) {
      DEBUGF(fprintf(stderr, "Error: Curl_ssl_init failed\n"));
      return CURLE_FAILED_INIT;
    }

  if(flags & CURL_GLOBAL_WIN32)
    if(win32_init() != CURLE_OK) {
      DEBUGF(fprintf(stderr, "Error: win32_init failed\n"));
      return CURLE_FAILED_INIT;
    }

#ifdef __AMIGA__
  if(!amiga_init()) {
    DEBUGF(fprintf(stderr, "Error: amiga_init failed\n"));
    return CURLE_FAILED_INIT;
  }
#endif

#ifdef NETWARE
  if(netware_init()) {
    DEBUGF(fprintf(stderr, "Warning: LONG namespace not available\n"));
  }
#endif

#ifdef USE_LIBIDN
  idna_init();
#endif

  init_flags  = flags;

  return CURLE_OK;
}

/*
 * curl_global_init_mem() globally initializes cURL and also registers the
 * user provided callback routines.
 */
CURLcode curl_global_init_mem(long flags, curl_malloc_callback m,
                              curl_free_callback f, curl_realloc_callback r,
                              curl_strdup_callback s, curl_calloc_callback c)
{
  CURLcode code = CURLE_OK;

  /* Invalid input, return immediately */
  if(!m || !f || !r || !s || !c)
    return CURLE_FAILED_INIT;

  /* Already initialized, don't do it again */
  if( initialized )
    return CURLE_OK;

  /* Call the actual init function first */
  code = curl_global_init(flags);
  if(code == CURLE_OK) {
    Curl_cmalloc = m;
    Curl_cfree = f;
    Curl_cstrdup = s;
    Curl_crealloc = r;
    Curl_ccalloc = c;
  }

  return code;
}

/**
 * curl_global_cleanup() globally cleanups cURL, uses the value of
 * "init_flags" to determine what needs to be cleaned up and what doesn't.
 */
void curl_global_cleanup(void)
{
  if(!initialized)
    return;

  if(--initialized)
    return;

  Curl_global_host_cache_dtor();

  if(init_flags & CURL_GLOBAL_SSL)
    Curl_ssl_cleanup();

  if(init_flags & CURL_GLOBAL_WIN32)
    win32_cleanup();

#ifdef __AMIGA__
  amiga_cleanup();
#endif

  init_flags  = 0;
}

/*
 * curl_easy_init() is the external interface to alloc, setup and init an
 * easy handle that is returned. If anything goes wrong, NULL is returned.
 */
CURL *curl_easy_init(void)
{
  CURLcode res;
  struct SessionHandle *data;

  /* Make sure we inited the global SSL stuff */
  if(!initialized) {
    res = curl_global_init(CURL_GLOBAL_DEFAULT);
    if(res) {
      /* something in the global init failed, return nothing */
      DEBUGF(fprintf(stderr, "Error: curl_global_init failed\n"));
      return NULL;
    }
  }

  /* We use curl_open() with undefined URL so far */
  res = Curl_open(&data);
  if(res != CURLE_OK) {
    DEBUGF(fprintf(stderr, "Error: Curl_open failed\n"));
    return NULL;
  }

  return data;
}

/*
 * curl_easy_setopt() is the external interface for setting options on an
 * easy handle.
 */

#undef curl_easy_setopt
CURLcode curl_easy_setopt(CURL *curl, CURLoption tag, ...)
{
  va_list arg;
  struct SessionHandle *data = curl;
  CURLcode ret;

  if(!curl)
    return CURLE_BAD_FUNCTION_ARGUMENT;

  va_start(arg, tag);

  ret = Curl_setopt(data, tag, arg);

  va_end(arg);
  return ret;
}

#ifdef CURL_MULTIEASY
/***************************************************************************
 * This function is still only for testing purposes. It makes a great way
 * to run the full test suite on the multi interface instead of the easy one.
 ***************************************************************************
 *
 * The *new* curl_easy_perform() is the external interface that performs a
 * transfer previously setup.
 *
 * Wrapper-function that: creates a multi handle, adds the easy handle to it,
 * runs curl_multi_perform() until the transfer is done, then detaches the
 * easy handle, destroys the multi handle and returns the easy handle's return
 * code. This will make everything internally use and assume multi interface.
 */
CURLcode curl_easy_perform(CURL *easy)
{
  CURLM *multi;
  CURLMcode mcode;
  CURLcode code = CURLE_OK;
  int still_running;
  struct timeval timeout;
  int rc;
  CURLMsg *msg;
  fd_set fdread;
  fd_set fdwrite;
  fd_set fdexcep;
  int maxfd;

  if(!easy)
    return CURLE_BAD_FUNCTION_ARGUMENT;

  multi = curl_multi_init();
  if(!multi)
    return CURLE_OUT_OF_MEMORY;

  mcode = curl_multi_add_handle(multi, easy);
  if(mcode) {
    curl_multi_cleanup(multi);
    if(mcode == CURLM_OUT_OF_MEMORY)
      return CURLE_OUT_OF_MEMORY;
    else
      return CURLE_FAILED_INIT;
  }

  /* we start some action by calling perform right away */

  do {
    while(CURLM_CALL_MULTI_PERFORM ==
          curl_multi_perform(multi, &still_running));

    if(!still_running)
      break;

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

    /* timeout once per second */
    timeout.tv_sec = 1;
    timeout.tv_usec = 0;

    /* Old deprecated style: get file descriptors from the transfers */
    curl_multi_fdset(multi, &fdread, &fdwrite, &fdexcep, &maxfd);
    rc = Curl_select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);

    /* The way is to extract the sockets and wait for them without using
       select. This whole alternative version should probably rather use the
       curl_multi_socket() approach. */

    if(rc == -1)
      /* select error */
      break;

    /* timeout or data to send/receive => loop! */
  } while(still_running);

  msg = curl_multi_info_read(multi, &rc);
  if(msg)
    code = msg->data.result;

  mcode = curl_multi_remove_handle(multi, easy);
  /* what to do if it fails? */

  mcode = curl_multi_cleanup(multi);
  /* what to do if it fails? */

  return code;
}
#else
/*
 * curl_easy_perform() is the external interface that performs a transfer
 * previously setup.
 */
CURLcode curl_easy_perform(CURL *curl)
{
  struct SessionHandle *data = (struct SessionHandle *)curl;

  if(!data)
    return CURLE_BAD_FUNCTION_ARGUMENT;

  if( ! (data->share && data->share->hostcache) ) {
    /* this handle is not using a shared dns cache */

    if(data->set.global_dns_cache &&
       (data->dns.hostcachetype != HCACHE_GLOBAL)) {
      /* global dns cache was requested but still isn't */
      struct curl_hash *ptr;

      if(data->dns.hostcachetype == HCACHE_PRIVATE)
        /* if the current cache is private, kill it first */
        Curl_hash_destroy(data->dns.hostcache);

      ptr = Curl_global_host_cache_init();
      if(ptr) {
        /* only do this if the global cache init works */
        data->dns.hostcache = ptr;
        data->dns.hostcachetype = HCACHE_GLOBAL;
      }
    }

    if(!data->dns.hostcache) {
      data->dns.hostcachetype = HCACHE_PRIVATE;
      data->dns.hostcache = Curl_mk_dnscache();

      if(!data->dns.hostcache)
        /* While we possibly could survive and do good without a host cache,
           the fact that creating it failed indicates that things are truly
           screwed up and we should bail out! */
        return CURLE_OUT_OF_MEMORY;
    }

  }

  if(!data->state.connc) {
    /* oops, no connection cache, make one up */
    data->state.connc = Curl_mk_connc(CONNCACHE_PRIVATE, -1);
    if(!data->state.connc)
      return CURLE_OUT_OF_MEMORY;
  }

  return Curl_perform(data);
}
#endif

/*
 * curl_easy_cleanup() is the external interface to cleaning/freeing the given
 * easy handle.
 */
void curl_easy_cleanup(CURL *curl)
{
  struct SessionHandle *data = (struct SessionHandle *)curl;

  if(!data)
    return;

  Curl_close(data);
}

/*
 * Store a pointed to the multi handle within the easy handle's data struct.
 */
void Curl_easy_addmulti(struct SessionHandle *data,
                        void *multi)
{
  data->multi = multi;
  if(multi == NULL)
    /* the association is cleared, mark the easy handle as not used by an
       interface */
    data->state.used_interface = Curl_if_none;
}

void Curl_easy_initHandleData(struct SessionHandle *data)
{
    memset(&data->req, 0, sizeof(struct SingleRequest));

    data->req.maxdownload = -1;
}

/*
 * curl_easy_getinfo() is an external interface that allows an app to retrieve
 * information from a performed transfer and similar.
 */
CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ...)
{
  va_list arg;
  void *paramp;
  struct SessionHandle *data = (struct SessionHandle *)curl;

  va_start(arg, info);
  paramp = va_arg(arg, void *);

  return Curl_getinfo(data, info, paramp);
}

/*
 * curl_easy_duphandle() is an external interface to allow duplication of a
 * given input easy handle. The returned handle will be a new working handle
 * with all options set exactly as the input source handle.
 */
CURL *curl_easy_duphandle(CURL *incurl)
{
  bool fail = TRUE;
  struct SessionHandle *data=(struct SessionHandle *)incurl;

  struct SessionHandle *outcurl = (struct SessionHandle *)
    calloc(sizeof(struct SessionHandle), 1);

  if(NULL == outcurl)
    return NULL; /* failure */

  do {

    /*
     * We setup a few buffers we need. We should probably make them
     * get setup on-demand in the code, as that would probably decrease
     * the likeliness of us forgetting to init a buffer here in the future.
     */
    outcurl->state.headerbuff=(char*)malloc(HEADERSIZE);
    if(!outcurl->state.headerbuff) {
      break;
    }
    outcurl->state.headersize=HEADERSIZE;

    /* copy all userdefined values */
    if(Curl_dupset(outcurl, data) != CURLE_OK)
      break;

    if(data->state.used_interface == Curl_if_multi)
      outcurl->state.connc = data->state.connc;
    else
      outcurl->state.connc = Curl_mk_connc(CONNCACHE_PRIVATE, -1);

    if(!outcurl->state.connc)
      break;

    outcurl->state.lastconnect = -1;

    outcurl->progress.flags    = data->progress.flags;
    outcurl->progress.callback = data->progress.callback;

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
    if(data->cookies) {
      /* If cookies are enabled in the parent handle, we enable them
         in the clone as well! */
      outcurl->cookies = Curl_cookie_init(data,
                                          data->cookies->filename,
                                          outcurl->cookies,
                                          data->set.cookiesession);
      if(!outcurl->cookies) {
        break;
      }
    }
#endif   /* CURL_DISABLE_HTTP */

    /* duplicate all values in 'change' */

    if(data->change.url) {
      outcurl->change.url = strdup(data->change.url);
      if(!outcurl->change.url)
        break;
      outcurl->change.url_alloc = TRUE;
    }

    if(data->change.referer) {
      outcurl->change.referer = strdup(data->change.referer);
      if(!outcurl->change.referer)
        break;
      outcurl->change.referer_alloc = TRUE;
    }

#ifdef USE_ARES
    /* If we use ares, we setup a new ares channel for the new handle */
    if(ARES_SUCCESS != ares_init(&outcurl->state.areschannel))
      break;
#endif

#if defined(CURL_DOES_CONVERSIONS) && defined(HAVE_ICONV)
    outcurl->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
                                     CURL_ICONV_CODESET_OF_NETWORK);
    outcurl->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
                                      CURL_ICONV_CODESET_OF_HOST);
    outcurl->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
                                  CURL_ICONV_CODESET_FOR_UTF8);
#endif

    Curl_easy_initHandleData(outcurl);

    outcurl->magic = CURLEASY_MAGIC_NUMBER;

    fail = FALSE; /* we reach this point and thus we are OK */

  } while(0);

  if(fail) {
    if(outcurl) {
      if(outcurl->state.connc &&
         (outcurl->state.connc->type == CONNCACHE_PRIVATE))
        Curl_rm_connc(outcurl->state.connc);
      if(outcurl->state.headerbuff)
        free(outcurl->state.headerbuff);
      if(outcurl->change.url)
        free(outcurl->change.url);
      if(outcurl->change.referer)
        free(outcurl->change.referer);
      Curl_freeset(outcurl);
      free(outcurl); /* free the memory again */
      outcurl = NULL;
    }
  }

  return outcurl;
}

/*
 * curl_easy_reset() is an external interface that allows an app to re-
 * initialize a session handle to the default values.
 */
void curl_easy_reset(CURL *curl)
{
  struct SessionHandle *data = (struct SessionHandle *)curl;

  Curl_safefree(data->state.pathbuffer);
  data->state.pathbuffer=NULL;

  Curl_safefree(data->state.proto.generic);
  data->state.proto.generic=NULL;

  /* zero out UserDefined data: */
  Curl_freeset(data);
  memset(&data->set, 0, sizeof(struct UserDefined));

  /* zero out Progress data: */
  memset(&data->progress, 0, sizeof(struct Progress));

  /* init Handle data */
  Curl_easy_initHandleData(data);

  /* The remainder of these calls have been taken from Curl_open() */

  data->set.out = stdout; /* default output to stdout */
  data->set.in  = stdin;  /* default input from stdin */
  data->set.err  = stderr;  /* default stderr to stderr */

  /* use fwrite as default function to store output */
  data->set.fwrite_func = (curl_write_callback)fwrite;

  /* use fread as default function to read input */
  data->set.fread_func = (curl_read_callback)fread;

  data->set.infilesize = -1; /* we don't know any size */
  data->set.postfieldsize = -1;

  data->state.current_speed = -1; /* init to negative == impossible */

  data->set.httpreq = HTTPREQ_GET; /* Default HTTP request */
  data->set.ftp_use_epsv = TRUE;   /* FTP defaults to EPSV operations */
  data->set.ftp_use_eprt = TRUE;   /* FTP defaults to EPRT operations */

  data->set.dns_cache_timeout = 60; /* Timeout every 60 seconds by default */

  /* make libcurl quiet by default: */
  data->set.hide_progress = TRUE;  /* CURLOPT_NOPROGRESS changes these */
  data->progress.flags |= PGRS_HIDE;

  /* Set the default size of the SSL session ID cache */
  data->set.ssl.numsessions = 5;

  data->set.proxyport = 1080;
  data->set.proxytype = CURLPROXY_HTTP; /* defaults to HTTP proxy */
  data->set.httpauth = CURLAUTH_BASIC;  /* defaults to basic */
  data->set.proxyauth = CURLAUTH_BASIC; /* defaults to basic */

  /*
   * libcurl 7.10 introduced SSL verification *by default*! This needs to be
   * switched off unless wanted.
   */
  data->set.ssl.verifypeer = TRUE;
  data->set.ssl.verifyhost = 2;
#ifdef CURL_CA_BUNDLE
  /* This is our prefered CA cert bundle since install time */
  (void) curl_easy_setopt(curl, CURLOPT_CAINFO, (char *) CURL_CA_BUNDLE);
#endif

  data->set.ssh_auth_types = CURLSSH_AUTH_DEFAULT; /* defaults to any auth
                                                      type */
  data->set.new_file_perms = 0644;    /* Default permissions */
  data->set.new_directory_perms = 0755; /* Default permissions */
}

/*
 * curl_easy_pause() allows an application to pause or unpause a specific
 * transfer and direction. This function sets the full new state for the
 * current connection this easy handle operates on.
 *
 * NOTE: if you have the receiving paused and you call this function to remove
 * the pausing, you may get your write callback called at this point.
 *
 * Action is a bitmask consisting of CURLPAUSE_* bits in curl/curl.h
 */
CURLcode curl_easy_pause(CURL *curl, int action)
{
  struct SessionHandle *data = (struct SessionHandle *)curl;
  struct SingleRequest *k = &data->req;
  CURLcode result = CURLE_OK;

  /* first switch off both pause bits */
  int newstate = k->keepon &~ (KEEP_READ_PAUSE| KEEP_WRITE_PAUSE);

  /* set the new desired pause bits */
  newstate |= ((action & CURLPAUSE_RECV)?KEEP_READ_PAUSE:0) |
    ((action & CURLPAUSE_SEND)?KEEP_WRITE_PAUSE:0);

  /* put it back in the keepon */
  k->keepon = newstate;

  if(!(newstate & KEEP_READ_PAUSE) && data->state.tempwrite) {
    /* we have a buffer for writing that we now seem to be able to deliver since
       the receive pausing is lifted! */

    /* get the pointer, type and length in local copies since the function may
       return PAUSE again and then we'll get a new copy allocted and stored in
       the tempwrite variables */
    char *tempwrite = data->state.tempwrite;
    size_t tempsize = data->state.tempwritesize;
    int temptype = data->state.tempwritetype;
    size_t chunklen;

    /* clear tempwrite here just to make sure it gets cleared if there's no
       further use of it, and make sure we don't clear it after the function
       invoke as it may have been set to a new value by then */
    data->state.tempwrite = NULL;

    /* since the write callback API is define to never exceed
       CURL_MAX_WRITE_SIZE bytes in a single call, and since we may in fact
       have more data than that in our buffer here, we must loop sending the
       data in multiple calls until there's no data left or we get another
       pause returned.

       A tricky part is that the function we call will "buffer" the data
       itself when it pauses on a particular buffer, so we may need to do some
       extra trickery if we get a pause return here.
    */
    do {
      chunklen = (tempsize > CURL_MAX_WRITE_SIZE)?CURL_MAX_WRITE_SIZE:tempsize;

      result = Curl_client_write(data->state.current_conn,
                                 temptype, tempwrite, chunklen);
      if(!result)
        /* failures abort the loop at once */
        break;

      if(data->state.tempwrite && (tempsize - chunklen)) {
        /* Ouch, the reading is again paused and the block we send is now
           "cached". If this is the final chunk we can leave it like this, but
           if we have more chunks that is cached after this, we need to free
           the newly cached one and put back a version that is truly the entire
           contents that is saved for later
        */
        char *newptr;

        free(data->state.tempwrite); /* free the one just cached as it isn't
                                        enough */

        /* note that tempsize is still the size as before the callback was
           used, and thus the whole piece of data to keep */
        newptr = malloc(tempsize);
        if(!newptr) {
          result = CURLE_OUT_OF_MEMORY;
          /* tempwrite will be freed further down */
          break;
        }
        data->state.tempwrite = newptr; /* store new pointer */
        memcpy(newptr, tempwrite, tempsize);
        data->state.tempwritesize = tempsize; /* store new size */
        /* tempwrite will be freed further down */
        break; /* go back to pausing until further notice */
      }
      else {
        tempsize -= chunklen;  /* left after the call above */
        tempwrite += chunklen; /* advance the pointer */
      }

    } while((result == CURLE_OK) && tempsize);

    free(tempwrite); /* this is unconditionally no longer used */
  }

  return result;
}

#ifdef CURL_DOES_CONVERSIONS
/*
 * Curl_convert_to_network() is an internal function
 * for performing ASCII conversions on non-ASCII platforms.
 */
CURLcode Curl_convert_to_network(struct SessionHandle *data,
                                 char *buffer, size_t length)
{
  CURLcode rc;

  if(data->set.convtonetwork) {
    /* use translation callback */
    rc = data->set.convtonetwork(buffer, length);
    if(rc != CURLE_OK) {
      failf(data,
            "CURLOPT_CONV_TO_NETWORK_FUNCTION callback returned %i: %s",
            rc, curl_easy_strerror(rc));
    }
    return(rc);
  } else {
#ifdef HAVE_ICONV
    /* do the translation ourselves */
    char *input_ptr, *output_ptr;
    size_t in_bytes, out_bytes, rc;
    int error;

    /* open an iconv conversion descriptor if necessary */
    if(data->outbound_cd == (iconv_t)-1) {
      data->outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
                                     CURL_ICONV_CODESET_OF_HOST);
      if(data->outbound_cd == (iconv_t)-1) {
        error = ERRNO;
        failf(data,
              "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
               CURL_ICONV_CODESET_OF_NETWORK,
               CURL_ICONV_CODESET_OF_HOST,
               error, strerror(error));
        return CURLE_CONV_FAILED;
      }
    }
    /* call iconv */
    input_ptr = output_ptr = buffer;
    in_bytes = out_bytes = length;
    rc = iconv(data->outbound_cd, (const char**)&input_ptr, &in_bytes,
               &output_ptr, &out_bytes);
    if((rc == ICONV_ERROR) || (in_bytes != 0)) {
      error = ERRNO;
      failf(data,
        "The Curl_convert_to_network iconv call failed with errno %i: %s",
             error, strerror(error));
      return CURLE_CONV_FAILED;
    }
#else
    failf(data, "CURLOPT_CONV_TO_NETWORK_FUNCTION callback required");
    return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
  }

  return CURLE_OK;
}

/*
 * Curl_convert_from_network() is an internal function
 * for performing ASCII conversions on non-ASCII platforms.
 */
CURLcode Curl_convert_from_network(struct SessionHandle *data,
                                      char *buffer, size_t length)
{
  CURLcode rc;

  if(data->set.convfromnetwork) {
    /* use translation callback */
    rc = data->set.convfromnetwork(buffer, length);
    if(rc != CURLE_OK) {
      failf(data,
            "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback returned %i: %s",
            rc, curl_easy_strerror(rc));
    }
    return(rc);
  } else {
#ifdef HAVE_ICONV
    /* do the translation ourselves */
    char *input_ptr, *output_ptr;
    size_t in_bytes, out_bytes, rc;
    int error;

    /* open an iconv conversion descriptor if necessary */
    if(data->inbound_cd == (iconv_t)-1) {
      data->inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
                                    CURL_ICONV_CODESET_OF_NETWORK);
      if(data->inbound_cd == (iconv_t)-1) {
        error = ERRNO;
        failf(data,
              "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
               CURL_ICONV_CODESET_OF_HOST,
               CURL_ICONV_CODESET_OF_NETWORK,
               error, strerror(error));
        return CURLE_CONV_FAILED;
      }
    }
    /* call iconv */
    input_ptr = output_ptr = buffer;
    in_bytes = out_bytes = length;
    rc = iconv(data->inbound_cd, (const char **)&input_ptr, &in_bytes,
               &output_ptr, &out_bytes);
    if((rc == ICONV_ERROR) || (in_bytes != 0)) {
      error = ERRNO;
      failf(data,
        "The Curl_convert_from_network iconv call failed with errno %i: %s",
             error, strerror(error));
      return CURLE_CONV_FAILED;
    }
#else
    failf(data, "CURLOPT_CONV_FROM_NETWORK_FUNCTION callback required");
    return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
  }

  return CURLE_OK;
}

/*
 * Curl_convert_from_utf8() is an internal function
 * for performing UTF-8 conversions on non-ASCII platforms.
 */
CURLcode Curl_convert_from_utf8(struct SessionHandle *data,
                                     char *buffer, size_t length)
{
  CURLcode rc;

  if(data->set.convfromutf8) {
    /* use translation callback */
    rc = data->set.convfromutf8(buffer, length);
    if(rc != CURLE_OK) {
      failf(data,
            "CURLOPT_CONV_FROM_UTF8_FUNCTION callback returned %i: %s",
            rc, curl_easy_strerror(rc));
    }
    return(rc);
  } else {
#ifdef HAVE_ICONV
    /* do the translation ourselves */
    const char *input_ptr;
    char *output_ptr;
    size_t in_bytes, out_bytes, rc;
    int error;

    /* open an iconv conversion descriptor if necessary */
    if(data->utf8_cd == (iconv_t)-1) {
      data->utf8_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
                                 CURL_ICONV_CODESET_FOR_UTF8);
      if(data->utf8_cd == (iconv_t)-1) {
        error = ERRNO;
        failf(data,
              "The iconv_open(\"%s\", \"%s\") call failed with errno %i: %s",
               CURL_ICONV_CODESET_OF_HOST,
               CURL_ICONV_CODESET_FOR_UTF8,
               error, strerror(error));
        return CURLE_CONV_FAILED;
      }
    }
    /* call iconv */
    input_ptr = output_ptr = buffer;
    in_bytes = out_bytes = length;
    rc = iconv(data->utf8_cd, &input_ptr, &in_bytes,
               &output_ptr, &out_bytes);
    if((rc == ICONV_ERROR) || (in_bytes != 0)) {
      error = ERRNO;
      failf(data,
        "The Curl_convert_from_utf8 iconv call failed with errno %i: %s",
             error, strerror(error));
      return CURLE_CONV_FAILED;
    }
    if(output_ptr < input_ptr) {
      /* null terminate the now shorter output string */
      *output_ptr = 0x00;
    }
#else
    failf(data, "CURLOPT_CONV_FROM_UTF8_FUNCTION callback required");
    return CURLE_CONV_REQD;
#endif /* HAVE_ICONV */
  }

  return CURLE_OK;
}

#endif /* CURL_DOES_CONVERSIONS */