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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at https://curl.haxx.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  *
     22  ***************************************************************************/
     23 
     24 /* CCSID API wrappers for OS/400. */
     25 
     26 #include <iconv.h>
     27 #include <string.h>
     28 #include <stdlib.h>
     29 #include <errno.h>
     30 #include <stdarg.h>
     31 
     32 #pragma enum(int)
     33 
     34 #include "curl.h"
     35 #include "mprintf.h"
     36 #include "slist.h"
     37 #include "urldata.h"
     38 #include "url.h"
     39 #include "getinfo.h"
     40 #include "ccsidcurl.h"
     41 
     42 #include "os400sys.h"
     43 
     44 #ifndef SIZE_MAX
     45 #define SIZE_MAX        ((size_t) ~0)   /* Is unsigned on OS/400. */
     46 #endif
     47 
     48 
     49 #define ASCII_CCSID     819     /* Use ISO-8859-1 as ASCII. */
     50 #define NOCONV_CCSID    65535   /* No conversion. */
     51 #define ICONV_ID_SIZE   32      /* Size of iconv_open() code identifier. */
     52 #define ICONV_OPEN_ERROR(t)     ((t).return_value == -1)
     53 
     54 #define ALLOC_GRANULE   8       /* Alloc. granule for curl_formadd_ccsid(). */
     55 
     56 
     57 static void
     58 makeOS400IconvCode(char buf[ICONV_ID_SIZE], unsigned int ccsid)
     59 
     60 {
     61   /**
     62   *** Convert a CCSID to the corresponding IBM iconv_open() character
     63   ***  code identifier.
     64   ***  This code is specific to the OS400 implementation of the iconv library.
     65   ***  CCSID 65535 (no conversion) is replaced by the ASCII CCSID.
     66   ***  CCSID 0 is interpreted by the OS400 as the job's CCSID.
     67   **/
     68 
     69   ccsid &= 0xFFFF;
     70 
     71   if(ccsid == NOCONV_CCSID)
     72     ccsid = ASCII_CCSID;
     73 
     74   memset(buf, 0, ICONV_ID_SIZE);
     75   curl_msprintf(buf, "IBMCCSID%05u0000000", ccsid);
     76 }
     77 
     78 
     79 static iconv_t
     80 iconv_open_CCSID(unsigned int ccsidout, unsigned int ccsidin,
     81                                                         unsigned int cstr)
     82 
     83 {
     84   char fromcode[ICONV_ID_SIZE];
     85   char tocode[ICONV_ID_SIZE];
     86 
     87   /**
     88   ***  Like iconv_open(), but character codes are given as CCSIDs.
     89   ***  If `cstr' is non-zero, conversion is set up to stop whenever a
     90   ***   null character is encountered.
     91   ***  See iconv_open() IBM description in "National Language Support API".
     92   **/
     93 
     94   makeOS400IconvCode(fromcode, ccsidin);
     95   makeOS400IconvCode(tocode, ccsidout);
     96   memset(tocode + 13, 0, sizeof tocode - 13);   /* Dest. code id format. */
     97 
     98   if(cstr)
     99     fromcode[18] = '1';                         /* Set null-terminator flag. */
    100 
    101   return iconv_open(tocode, fromcode);
    102 }
    103 
    104 
    105 static int
    106 convert(char * d, size_t dlen, int dccsid,
    107         const char * s, int slen, int sccsid)
    108 
    109 {
    110   int i;
    111   iconv_t cd;
    112   size_t lslen;
    113 
    114   /**
    115   ***  Convert `sccsid'-coded `slen'-data bytes at `s' into `dccsid'-coded
    116   ***   data stored in the `dlen'-byte buffer at `d'.
    117   ***  If `slen' < 0, source string is null-terminated.
    118   ***  CCSID 65535 (no conversion) is replaced by the ASCII CCSID.
    119   ***  Return the converted destination byte count, or -1 if error.
    120   **/
    121 
    122   if(sccsid == 65535)
    123     sccsid = ASCII_CCSID;
    124 
    125   if(dccsid == 65535)
    126     dccsid = ASCII_CCSID;
    127 
    128   if(sccsid == dccsid) {
    129     lslen = slen >= 0? slen: strlen(s) + 1;
    130     i = lslen < dlen? lslen: dlen;
    131 
    132     if(s != d && i > 0)
    133       memcpy(d, s, i);
    134 
    135     return i;
    136     }
    137 
    138   if(slen < 0) {
    139     lslen = 0;
    140     cd = iconv_open_CCSID(dccsid, sccsid, 1);
    141     }
    142   else {
    143     lslen = (size_t) slen;
    144     cd = iconv_open_CCSID(dccsid, sccsid, 0);
    145     }
    146 
    147   if(ICONV_OPEN_ERROR(cd))
    148     return -1;
    149 
    150   i = dlen;
    151 
    152   if((int) iconv(cd, (char * *) &s, &lslen, &d, &dlen) < 0)
    153     i = -1;
    154   else
    155     i -= dlen;
    156 
    157   iconv_close(cd);
    158   return i;
    159 }
    160 
    161 
    162 static char *
    163 dynconvert(int dccsid, const char * s, int slen, int sccsid)
    164 
    165 {
    166   char * d;
    167   char * cp;
    168   size_t dlen;
    169   int l;
    170   static const char nullbyte = 0;
    171 
    172   /* Like convert, but the destination is allocated and returned. */
    173 
    174   dlen = (size_t) (slen < 0? strlen(s): slen) + 1;
    175   dlen *= MAX_CONV_EXPANSION;           /* Allow some expansion. */
    176   d = malloc(dlen);
    177 
    178   if(!d)
    179     return (char *) NULL;
    180 
    181   l = convert(d, dlen, dccsid, s, slen, sccsid);
    182 
    183   if(l < 0) {
    184     free(d);
    185     return (char *) NULL;
    186     }
    187 
    188   if(slen < 0) {
    189     /* Need to null-terminate even when source length is given.
    190        Since destination code size is unknown, use a conversion to generate
    191        terminator. */
    192 
    193     int l2 = convert(d + l, dlen - l, dccsid, &nullbyte, -1, ASCII_CCSID);
    194 
    195     if(l2 < 0) {
    196       free(d);
    197       return (char *) NULL;
    198       }
    199 
    200     l += l2;
    201     }
    202 
    203   if((size_t) l < dlen) {
    204     cp = realloc(d, l);         /* Shorten to minimum needed. */
    205 
    206     if(cp)
    207       d = cp;
    208     }
    209 
    210   return d;
    211 }
    212 
    213 
    214 static struct curl_slist *
    215 slist_convert(int dccsid, struct curl_slist * from, int sccsid)
    216 
    217 {
    218   struct curl_slist * to = (struct curl_slist *) NULL;
    219 
    220   for(; from; from = from->next) {
    221     char * cp = dynconvert(dccsid, from->data, -1, sccsid);
    222 
    223     if(!cp) {
    224       curl_slist_free_all(to);
    225       return (struct curl_slist *) NULL;
    226     }
    227     to = Curl_slist_append_nodup(to, cp);
    228   }
    229   return to;
    230 }
    231 
    232 
    233 char *
    234 curl_version_ccsid(unsigned int ccsid)
    235 
    236 {
    237   int i;
    238   char * aversion;
    239   char * eversion;
    240 
    241   aversion = curl_version();
    242 
    243   if(!aversion)
    244     return aversion;
    245 
    246   i = strlen(aversion) + 1;
    247   i *= MAX_CONV_EXPANSION;
    248 
    249   if(!(eversion = Curl_thread_buffer(LK_CURL_VERSION, i)))
    250     return (char *) NULL;
    251 
    252   if(convert(eversion, i, ccsid, aversion, -1, ASCII_CCSID) < 0)
    253     return (char *) NULL;
    254 
    255   return eversion;
    256 }
    257 
    258 
    259 char *
    260 curl_easy_escape_ccsid(CURL * handle, const char * string, int length,
    261                        unsigned int sccsid, unsigned int dccsid)
    262 
    263 {
    264   char * s;
    265   char * d;
    266 
    267   if(!string) {
    268     errno = EINVAL;
    269     return (char *) NULL;
    270     }
    271 
    272   s = dynconvert(ASCII_CCSID, string, length? length: -1, sccsid);
    273 
    274   if(!s)
    275     return (char *) NULL;
    276 
    277   d = curl_easy_escape(handle, s, 0);
    278   free(s);
    279 
    280   if(!d)
    281     return (char *) NULL;
    282 
    283   s = dynconvert(dccsid, d, -1, ASCII_CCSID);
    284   free(d);
    285   return s;
    286 }
    287 
    288 
    289 char *
    290 curl_easy_unescape_ccsid(CURL * handle, const char * string, int length,
    291                          int * outlength,
    292                          unsigned int sccsid, unsigned int dccsid)
    293 
    294 {
    295   char * s;
    296   char * d;
    297 
    298   if(!string) {
    299     errno = EINVAL;
    300     return (char *) NULL;
    301     }
    302 
    303   s = dynconvert(ASCII_CCSID, string, length? length: -1, sccsid);
    304 
    305   if(!s)
    306     return (char *) NULL;
    307 
    308   d = curl_easy_unescape(handle, s, 0, outlength);
    309   free(s);
    310 
    311   if(!d)
    312     return (char *) NULL;
    313 
    314   s = dynconvert(dccsid, d, -1, ASCII_CCSID);
    315   free(d);
    316 
    317   if(s && outlength)
    318     *outlength = strlen(s);
    319 
    320   return s;
    321 }
    322 
    323 
    324 struct curl_slist *
    325 curl_slist_append_ccsid(struct curl_slist * list,
    326                         const char * data, unsigned int ccsid)
    327 
    328 {
    329   char * s;
    330 
    331   s = (char *) NULL;
    332 
    333   if(!data)
    334     return curl_slist_append(list, data);
    335 
    336   s = dynconvert(ASCII_CCSID, data, -1, ccsid);
    337 
    338   if(!s)
    339     return (struct curl_slist *) NULL;
    340 
    341   list = curl_slist_append(list, s);
    342   free(s);
    343   return list;
    344 }
    345 
    346 
    347 time_t
    348 curl_getdate_ccsid(const char * p, const time_t * unused, unsigned int ccsid)
    349 
    350 {
    351   char * s;
    352   time_t t;
    353 
    354   if(!p)
    355     return curl_getdate(p, unused);
    356 
    357   s = dynconvert(ASCII_CCSID, p, -1, ccsid);
    358 
    359   if(!s)
    360     return (time_t) -1;
    361 
    362   t = curl_getdate(s, unused);
    363   free(s);
    364   return t;
    365 }
    366 
    367 
    368 static int
    369 convert_version_info_string(const char * * stringp,
    370                             char * * bufp, int * left, unsigned int ccsid)
    371 
    372 {
    373   /* Helper for curl_version_info_ccsid(): convert a string if defined.
    374      Result is stored in the `*left'-byte buffer at `*bufp'.
    375      `*bufp' and `*left' are updated accordingly.
    376      Return 0 if ok, else -1. */
    377 
    378   if(*stringp) {
    379     int l = convert(*bufp, *left, ccsid, *stringp, -1, ASCII_CCSID);
    380 
    381     if(l <= 0)
    382       return -1;
    383 
    384     *stringp = *bufp;
    385     *bufp += l;
    386     *left -= l;
    387     }
    388 
    389   return 0;
    390 }
    391 
    392 
    393 curl_version_info_data *
    394 curl_version_info_ccsid(CURLversion stamp, unsigned int ccsid)
    395 
    396 {
    397   curl_version_info_data * p;
    398   char * cp;
    399   int n;
    400   int nproto;
    401   curl_version_info_data * id;
    402 
    403   /* The assertion below is possible, because although the second operand
    404      is an enum member, the first is a #define. In that case, the OS/400 C
    405      compiler seems to compare string values after substitution. */
    406 
    407 #if CURLVERSION_NOW != CURLVERSION_FOURTH
    408 #error curl_version_info_data structure has changed: upgrade this procedure.
    409 #endif
    410 
    411   /* If caller has been compiled with a new version, error. */
    412 
    413   if(stamp > CURLVERSION_NOW)
    414     return (curl_version_info_data *) NULL;
    415 
    416   p = curl_version_info(stamp);
    417 
    418   if(!p)
    419     return p;
    420 
    421   /* Measure thread space needed. */
    422 
    423   n = 0;
    424   nproto = 0;
    425 
    426   if(p->protocols) {
    427     while(p->protocols[nproto])
    428       n += strlen(p->protocols[nproto++]);
    429 
    430     n += nproto++;
    431     }
    432 
    433   if(p->version)
    434     n += strlen(p->version) + 1;
    435 
    436   if(p->host)
    437     n += strlen(p->host) + 1;
    438 
    439   if(p->ssl_version)
    440     n += strlen(p->ssl_version) + 1;
    441 
    442   if(p->libz_version)
    443     n += strlen(p->libz_version) + 1;
    444 
    445   if(p->ares)
    446     n += strlen(p->ares) + 1;
    447 
    448   if(p->libidn)
    449     n += strlen(p->libidn) + 1;
    450 
    451   if(p->libssh_version)
    452     n += strlen(p->libssh_version) + 1;
    453 
    454   /* Allocate thread space. */
    455 
    456   n *= MAX_CONV_EXPANSION;
    457 
    458   if(nproto)
    459     n += nproto * sizeof(const char *);
    460 
    461   cp = Curl_thread_buffer(LK_VERSION_INFO_DATA, n);
    462   id = (curl_version_info_data *) Curl_thread_buffer(LK_VERSION_INFO,
    463                                                      sizeof *id);
    464 
    465   if(!id || !cp)
    466     return (curl_version_info_data *) NULL;
    467 
    468   /* Copy data and convert strings. */
    469 
    470   memcpy((char *) id, (char *) p, sizeof *p);
    471 
    472   if(id->protocols) {
    473     int i = nproto * sizeof id->protocols[0];
    474 
    475     id->protocols = (const char * const *) cp;
    476     memcpy(cp, (char *) p->protocols, i);
    477     cp += i;
    478     n -= i;
    479 
    480     for(i = 0; id->protocols[i]; i++)
    481       if(convert_version_info_string(((const char * *) id->protocols) + i,
    482                                       &cp, &n, ccsid))
    483         return (curl_version_info_data *) NULL;
    484     }
    485 
    486   if(convert_version_info_string(&id->version, &cp, &n, ccsid))
    487     return (curl_version_info_data *) NULL;
    488 
    489   if(convert_version_info_string(&id->host, &cp, &n, ccsid))
    490     return (curl_version_info_data *) NULL;
    491 
    492   if(convert_version_info_string(&id->ssl_version, &cp, &n, ccsid))
    493     return (curl_version_info_data *) NULL;
    494 
    495   if(convert_version_info_string(&id->libz_version, &cp, &n, ccsid))
    496     return (curl_version_info_data *) NULL;
    497 
    498   if(convert_version_info_string(&id->ares, &cp, &n, ccsid))
    499     return (curl_version_info_data *) NULL;
    500 
    501   if(convert_version_info_string(&id->libidn, &cp, &n, ccsid))
    502     return (curl_version_info_data *) NULL;
    503 
    504   if(convert_version_info_string(&id->libssh_version, &cp, &n, ccsid))
    505     return (curl_version_info_data *) NULL;
    506 
    507   return id;
    508 }
    509 
    510 
    511 const char *
    512 curl_easy_strerror_ccsid(CURLcode error, unsigned int ccsid)
    513 
    514 {
    515   int i;
    516   const char * s;
    517   char * buf;
    518 
    519   s = curl_easy_strerror(error);
    520 
    521   if(!s)
    522     return s;
    523 
    524   i = MAX_CONV_EXPANSION * (strlen(s) + 1);
    525 
    526   if(!(buf = Curl_thread_buffer(LK_EASY_STRERROR, i)))
    527     return (const char *) NULL;
    528 
    529   if(convert(buf, i, ccsid, s, -1, ASCII_CCSID) < 0)
    530     return (const char *) NULL;
    531 
    532   return (const char *) buf;
    533 }
    534 
    535 
    536 const char *
    537 curl_share_strerror_ccsid(CURLSHcode error, unsigned int ccsid)
    538 
    539 {
    540   int i;
    541   const char * s;
    542   char * buf;
    543 
    544   s = curl_share_strerror(error);
    545 
    546   if(!s)
    547     return s;
    548 
    549   i = MAX_CONV_EXPANSION * (strlen(s) + 1);
    550 
    551   if(!(buf = Curl_thread_buffer(LK_SHARE_STRERROR, i)))
    552     return (const char *) NULL;
    553 
    554   if(convert(buf, i, ccsid, s, -1, ASCII_CCSID) < 0)
    555     return (const char *) NULL;
    556 
    557   return (const char *) buf;
    558 }
    559 
    560 
    561 const char *
    562 curl_multi_strerror_ccsid(CURLMcode error, unsigned int ccsid)
    563 
    564 {
    565   int i;
    566   const char * s;
    567   char * buf;
    568 
    569   s = curl_multi_strerror(error);
    570 
    571   if(!s)
    572     return s;
    573 
    574   i = MAX_CONV_EXPANSION * (strlen(s) + 1);
    575 
    576   if(!(buf = Curl_thread_buffer(LK_MULTI_STRERROR, i)))
    577     return (const char *) NULL;
    578 
    579   if(convert(buf, i, ccsid, s, -1, ASCII_CCSID) < 0)
    580     return (const char *) NULL;
    581 
    582   return (const char *) buf;
    583 }
    584 
    585 
    586 void
    587 curl_certinfo_free_all(struct curl_certinfo *info)
    588 
    589 {
    590   /* Free all memory used by certificate info. */
    591   if(info) {
    592     if(info->certinfo) {
    593       int i;
    594 
    595       for(i = 0; i < info->num_of_certs; i++)
    596         curl_slist_free_all(info->certinfo[i]);
    597       free((char *) info->certinfo);
    598     }
    599     free((char *) info);
    600   }
    601 }
    602 
    603 
    604 CURLcode
    605 curl_easy_getinfo_ccsid(CURL * curl, CURLINFO info, ...)
    606 
    607 {
    608   va_list arg;
    609   void * paramp;
    610   CURLcode ret;
    611   unsigned int ccsid;
    612   char * * cpp;
    613   struct Curl_easy * data;
    614   struct curl_slist * * slp;
    615   struct curl_certinfo * cipf;
    616   struct curl_certinfo * cipt;
    617 
    618   /* WARNING: unlike curl_easy_getinfo(), the strings returned by this
    619      procedure have to be free'ed. */
    620 
    621   data = (struct Curl_easy *) curl;
    622   va_start(arg, info);
    623   paramp = va_arg(arg, void *);
    624   ret = Curl_getinfo(data, info, paramp);
    625 
    626   if(ret == CURLE_OK)
    627     switch ((int) info & CURLINFO_TYPEMASK) {
    628 
    629     case CURLINFO_STRING:
    630       ccsid = va_arg(arg, unsigned int);
    631       cpp = (char * *) paramp;
    632 
    633       if(*cpp) {
    634         *cpp = dynconvert(ccsid, *cpp, -1, ASCII_CCSID);
    635 
    636         if(!*cpp)
    637           ret = CURLE_OUT_OF_MEMORY;
    638       }
    639 
    640       break;
    641 
    642     case CURLINFO_SLIST:
    643       ccsid = va_arg(arg, unsigned int);
    644       switch (info) {
    645       case CURLINFO_CERTINFO:
    646         cipf = *(struct curl_certinfo * *) paramp;
    647         if(cipf) {
    648           if(!(cipt = (struct curl_certinfo *) malloc(sizeof *cipt)))
    649             ret = CURLE_OUT_OF_MEMORY;
    650           else {
    651             cipt->certinfo = (struct curl_slist * *)
    652                              calloc(cipf->num_of_certs +
    653                                     1, sizeof(struct curl_slist *));
    654             if(!cipt->certinfo)
    655               ret = CURLE_OUT_OF_MEMORY;
    656             else {
    657               int i;
    658 
    659               cipt->num_of_certs = cipf->num_of_certs;
    660               for(i = 0; i < cipf->num_of_certs; i++)
    661                 if(cipf->certinfo[i])
    662                   if(!(cipt->certinfo[i] = slist_convert(ccsid,
    663                                                           cipf->certinfo[i],
    664                                                           ASCII_CCSID))) {
    665                     ret = CURLE_OUT_OF_MEMORY;
    666                     break;
    667                   }
    668               }
    669             }
    670 
    671           if(ret != CURLE_OK) {
    672             curl_certinfo_free_all(cipt);
    673             cipt = (struct curl_certinfo *) NULL;
    674           }
    675 
    676           *(struct curl_certinfo * *) paramp = cipt;
    677         }
    678 
    679         break;
    680 
    681       case CURLINFO_TLS_SESSION:
    682       case CURLINFO_TLS_SSL_PTR:
    683       case CURLINFO_SOCKET:
    684         break;
    685 
    686       default:
    687         slp = (struct curl_slist * *) paramp;
    688         if(*slp)
    689           if(!(*slp = slist_convert(ccsid, *slp, ASCII_CCSID)))
    690             ret = CURLE_OUT_OF_MEMORY;
    691         break;
    692       }
    693     }
    694 
    695   va_end(arg);
    696   return ret;
    697 }
    698 
    699 
    700 static int
    701 Curl_is_formadd_string(CURLformoption option)
    702 
    703 {
    704   switch (option) {
    705 
    706   case CURLFORM_FILENAME:
    707   case CURLFORM_CONTENTTYPE:
    708   case CURLFORM_BUFFER:
    709   case CURLFORM_FILE:
    710   case CURLFORM_FILECONTENT:
    711   case CURLFORM_COPYCONTENTS:
    712   case CURLFORM_COPYNAME:
    713     return 1;
    714   }
    715 
    716   return 0;
    717 }
    718 
    719 
    720 static void
    721 Curl_formadd_release_local(struct curl_forms * forms, int nargs, int skip)
    722 
    723 {
    724   while(nargs--)
    725     if(nargs != skip)
    726       if(Curl_is_formadd_string(forms[nargs].option))
    727         if(forms[nargs].value)
    728           free((char *) forms[nargs].value);
    729 
    730   free((char *) forms);
    731 }
    732 
    733 
    734 static int
    735 Curl_formadd_convert(struct curl_forms * forms,
    736                      int formx, int lengthx, unsigned int ccsid)
    737 
    738 {
    739   int l;
    740   char * cp;
    741   char * cp2;
    742 
    743   if(formx < 0 || !forms[formx].value)
    744     return 0;
    745 
    746   if(lengthx >= 0)
    747     l = (int) forms[lengthx].value;
    748   else
    749     l = strlen(forms[formx].value) + 1;
    750 
    751   cp = malloc(MAX_CONV_EXPANSION * l);
    752 
    753   if(!cp)
    754     return -1;
    755 
    756   l = convert(cp, MAX_CONV_EXPANSION * l, ASCII_CCSID,
    757               forms[formx].value, l, ccsid);
    758 
    759   if(l < 0) {
    760     free(cp);
    761     return -1;
    762     }
    763 
    764   cp2 = realloc(cp, l);         /* Shorten buffer to the string size. */
    765 
    766   if(cp2)
    767     cp = cp2;
    768 
    769   forms[formx].value = cp;
    770 
    771   if(lengthx >= 0)
    772     forms[lengthx].value = (char *) l;  /* Update length after conversion. */
    773 
    774   return l;
    775 }
    776 
    777 
    778 CURLFORMcode
    779 curl_formadd_ccsid(struct curl_httppost * * httppost,
    780                    struct curl_httppost * * last_post, ...)
    781 
    782 {
    783   va_list arg;
    784   CURLformoption option;
    785   CURLFORMcode result;
    786   struct curl_forms * forms;
    787   struct curl_forms * lforms;
    788   struct curl_forms * tforms;
    789   unsigned int lformlen;
    790   const char * value;
    791   unsigned int ccsid;
    792   int nargs;
    793   int namex;
    794   int namelengthx;
    795   int contentx;
    796   int lengthx;
    797   unsigned int contentccsid;
    798   unsigned int nameccsid;
    799 
    800   /* A single curl_formadd() call cannot be splitted in several calls to deal
    801      with all parameters: the original parameters are thus copied to a local
    802      curl_forms array and converted to ASCII when needed.
    803      CURLFORM_PTRNAME is processed as if it were CURLFORM_COPYNAME.
    804      CURLFORM_COPYNAME and CURLFORM_NAMELENGTH occurrence order in
    805      parameters is not defined; for this reason, the actual conversion is
    806      delayed to the end of parameter processing. The same applies to
    807      CURLFORM_COPYCONTENTS/CURLFORM_CONTENTSLENGTH, but these may appear
    808      several times in the parameter list; the problem resides here in knowing
    809      which CURLFORM_CONTENTSLENGTH applies to which CURLFORM_COPYCONTENTS and
    810      when we can be sure to have both info for conversion: end of parameter
    811      list is such a point, but CURLFORM_CONTENTTYPE is also used here as a
    812      natural separator between content data definitions; this seems to be
    813      in accordance with FormAdd() behavior. */
    814 
    815   /* Allocate the local curl_forms array. */
    816 
    817   lformlen = ALLOC_GRANULE;
    818   lforms = malloc(lformlen * sizeof *lforms);
    819 
    820   if(!lforms)
    821     return CURL_FORMADD_MEMORY;
    822 
    823   /* Process the arguments, copying them into local array, latching conversion
    824      indexes and converting when needed. */
    825 
    826   result = CURL_FORMADD_OK;
    827   nargs = 0;
    828   contentx = -1;
    829   lengthx = -1;
    830   namex = -1;
    831   namelengthx = -1;
    832   forms = (struct curl_forms *) NULL;
    833   va_start(arg, last_post);
    834 
    835   for(;;) {
    836     /* Make sure there is still room for an item in local array. */
    837 
    838     if(nargs >= lformlen) {
    839       lformlen += ALLOC_GRANULE;
    840       tforms = realloc(lforms, lformlen * sizeof *lforms);
    841 
    842       if(!tforms) {
    843         result = CURL_FORMADD_MEMORY;
    844         break;
    845         }
    846 
    847       lforms = tforms;
    848       }
    849 
    850     /* Get next option. */
    851 
    852     if(forms) {
    853       /* Get option from array. */
    854 
    855       option = forms->option;
    856       value = forms->value;
    857       forms++;
    858       }
    859     else {
    860       /* Get option from arguments. */
    861 
    862       option = va_arg(arg, CURLformoption);
    863 
    864       if(option == CURLFORM_END)
    865         break;
    866       }
    867 
    868     /* Dispatch by option. */
    869 
    870     switch (option) {
    871 
    872     case CURLFORM_END:
    873       forms = (struct curl_forms *) NULL;       /* Leave array mode. */
    874       continue;
    875 
    876     case CURLFORM_ARRAY:
    877       if(!forms) {
    878         forms = va_arg(arg, struct curl_forms *);
    879         continue;
    880         }
    881 
    882       result = CURL_FORMADD_ILLEGAL_ARRAY;
    883       break;
    884 
    885     case CURLFORM_COPYNAME:
    886       option = CURLFORM_PTRNAME;                /* Static for now. */
    887 
    888     case CURLFORM_PTRNAME:
    889       if(namex >= 0)
    890         result = CURL_FORMADD_OPTION_TWICE;
    891 
    892       namex = nargs;
    893 
    894       if(!forms) {
    895         value = va_arg(arg, char *);
    896         nameccsid = (unsigned int) va_arg(arg, long);
    897         }
    898       else {
    899         nameccsid = (unsigned int) forms->value;
    900         forms++;
    901         }
    902 
    903       break;
    904 
    905     case CURLFORM_COPYCONTENTS:
    906       if(contentx >= 0)
    907         result = CURL_FORMADD_OPTION_TWICE;
    908 
    909       contentx = nargs;
    910 
    911       if(!forms) {
    912         value = va_arg(arg, char *);
    913         contentccsid = (unsigned int) va_arg(arg, long);
    914         }
    915       else {
    916         contentccsid = (unsigned int) forms->value;
    917         forms++;
    918         }
    919 
    920       break;
    921 
    922     case CURLFORM_PTRCONTENTS:
    923     case CURLFORM_BUFFERPTR:
    924       if(!forms)
    925         value = va_arg(arg, char *);            /* No conversion. */
    926 
    927       break;
    928 
    929     case CURLFORM_CONTENTSLENGTH:
    930       lengthx = nargs;
    931 
    932       if(!forms)
    933         value = (char *) va_arg(arg, long);
    934 
    935       break;
    936 
    937     case CURLFORM_CONTENTLEN:
    938       lengthx = nargs;
    939 
    940       if(!forms)
    941         value = (char *) va_arg(arg, curl_off_t);
    942 
    943       break;
    944 
    945     case CURLFORM_NAMELENGTH:
    946       namelengthx = nargs;
    947 
    948       if(!forms)
    949         value = (char *) va_arg(arg, long);
    950 
    951       break;
    952 
    953     case CURLFORM_BUFFERLENGTH:
    954       if(!forms)
    955         value = (char *) va_arg(arg, long);
    956 
    957       break;
    958 
    959     case CURLFORM_CONTENTHEADER:
    960       if(!forms)
    961         value = (char *) va_arg(arg, struct curl_slist *);
    962 
    963       break;
    964 
    965     case CURLFORM_STREAM:
    966       if(!forms)
    967         value = (char *) va_arg(arg, void *);
    968 
    969       break;
    970 
    971     case CURLFORM_CONTENTTYPE:
    972       /* If a previous content has been encountered, convert it now. */
    973 
    974       if(Curl_formadd_convert(lforms, contentx, lengthx, contentccsid) < 0) {
    975         result = CURL_FORMADD_MEMORY;
    976         break;
    977         }
    978 
    979       contentx = -1;
    980       lengthx = -1;
    981       /* Fall into default. */
    982 
    983     default:
    984       /* Must be a convertible string. */
    985 
    986       if(!Curl_is_formadd_string(option)) {
    987         result = CURL_FORMADD_UNKNOWN_OPTION;
    988         break;
    989         }
    990 
    991       if(!forms) {
    992         value = va_arg(arg, char *);
    993         ccsid = (unsigned int) va_arg(arg, long);
    994         }
    995       else {
    996         ccsid = (unsigned int) forms->value;
    997         forms++;
    998         }
    999 
   1000       /* Do the conversion. */
   1001 
   1002       lforms[nargs].value = value;
   1003 
   1004       if(Curl_formadd_convert(lforms, nargs, -1, ccsid) < 0) {
   1005         result = CURL_FORMADD_MEMORY;
   1006         break;
   1007         }
   1008 
   1009       value = lforms[nargs].value;
   1010       }
   1011 
   1012     if(result != CURL_FORMADD_OK)
   1013       break;
   1014 
   1015     lforms[nargs].value = value;
   1016     lforms[nargs++].option = option;
   1017     }
   1018 
   1019   va_end(arg);
   1020 
   1021   /* Convert the name and the last content, now that we know their lengths. */
   1022 
   1023   if(result == CURL_FORMADD_OK && namex >= 0) {
   1024     if(Curl_formadd_convert(lforms, namex, namelengthx, nameccsid) < 0)
   1025       result = CURL_FORMADD_MEMORY;
   1026     else
   1027       lforms[namex].option = CURLFORM_COPYNAME;         /* Force copy. */
   1028     }
   1029 
   1030   if(result == CURL_FORMADD_OK) {
   1031     if(Curl_formadd_convert(lforms, contentx, lengthx, contentccsid) < 0)
   1032       result = CURL_FORMADD_MEMORY;
   1033     else
   1034       contentx = -1;
   1035     }
   1036 
   1037   /* Do the formadd with our converted parameters. */
   1038 
   1039   if(result == CURL_FORMADD_OK) {
   1040     lforms[nargs].option = CURLFORM_END;
   1041     result = curl_formadd(httppost, last_post,
   1042                           CURLFORM_ARRAY, lforms, CURLFORM_END);
   1043     }
   1044 
   1045   /* Terminate. */
   1046 
   1047   Curl_formadd_release_local(lforms, nargs, contentx);
   1048   return result;
   1049 }
   1050 
   1051 
   1052 typedef struct {
   1053   curl_formget_callback append;
   1054   void *                arg;
   1055   unsigned int          ccsid;
   1056 }   cfcdata;
   1057 
   1058 
   1059 static size_t
   1060 Curl_formget_callback_ccsid(void * arg, const char * buf, size_t len)
   1061 
   1062 {
   1063   cfcdata * p;
   1064   char * b;
   1065   int l;
   1066   size_t ret;
   1067 
   1068   p = (cfcdata *) arg;
   1069 
   1070   if((long) len <= 0)
   1071     return (*p->append)(p->arg, buf, len);
   1072 
   1073   b = malloc(MAX_CONV_EXPANSION * len);
   1074 
   1075   if(!b)
   1076     return (size_t) -1;
   1077 
   1078   l = convert(b, MAX_CONV_EXPANSION * len, p->ccsid, buf, len, ASCII_CCSID);
   1079 
   1080   if(l < 0) {
   1081     free(b);
   1082     return (size_t) -1;
   1083     }
   1084 
   1085   ret = (*p->append)(p->arg, b, l);
   1086   free(b);
   1087   return ret == l? len: -1;
   1088 }
   1089 
   1090 
   1091 int
   1092 curl_formget_ccsid(struct curl_httppost * form, void * arg,
   1093                    curl_formget_callback append, unsigned int ccsid)
   1094 
   1095 {
   1096   cfcdata lcfc;
   1097 
   1098   lcfc.append = append;
   1099   lcfc.arg = arg;
   1100   lcfc.ccsid = ccsid;
   1101   return curl_formget(form, (void *) &lcfc, Curl_formget_callback_ccsid);
   1102 }
   1103 
   1104 
   1105 CURLcode
   1106 curl_easy_setopt_ccsid(CURL * curl, CURLoption tag, ...)
   1107 
   1108 {
   1109   CURLcode result;
   1110   va_list arg;
   1111   struct Curl_easy * data;
   1112   char * s;
   1113   char * cp;
   1114   unsigned int ccsid;
   1115   curl_off_t pfsize;
   1116   static char testwarn = 1;
   1117 
   1118   /* Warns if this procedure has not been updated when the dupstring enum
   1119      changes.
   1120      We (try to) do it only once: there is no need to issue several times
   1121      the same message; but since threadsafeness is not handled here,
   1122      this may occur (and we don't care!). */
   1123 
   1124   if(testwarn) {
   1125     testwarn = 0;
   1126 
   1127     if((int) STRING_LASTZEROTERMINATED != (int) STRING_UNIX_SOCKET_PATH + 1 ||
   1128        (int) STRING_LAST != (int) STRING_COPYPOSTFIELDS + 1)
   1129       curl_mfprintf(stderr,
   1130        "*** WARNING: curl_easy_setopt_ccsid() should be reworked ***\n");
   1131     }
   1132 
   1133   data = (struct Curl_easy *) curl;
   1134   va_start(arg, tag);
   1135 
   1136   switch (tag) {
   1137 
   1138   case CURLOPT_CAINFO:
   1139   case CURLOPT_CAPATH:
   1140   case CURLOPT_COOKIE:
   1141   case CURLOPT_COOKIEFILE:
   1142   case CURLOPT_COOKIEJAR:
   1143   case CURLOPT_COOKIELIST:
   1144   case CURLOPT_CRLFILE:
   1145   case CURLOPT_CUSTOMREQUEST:
   1146   case CURLOPT_DEFAULT_PROTOCOL:
   1147   case CURLOPT_DNS_SERVERS:
   1148   case CURLOPT_EGDSOCKET:
   1149   case CURLOPT_ENCODING:
   1150   case CURLOPT_FTPPORT:
   1151   case CURLOPT_FTP_ACCOUNT:
   1152   case CURLOPT_FTP_ALTERNATIVE_TO_USER:
   1153   case CURLOPT_INTERFACE:
   1154   case CURLOPT_ISSUERCERT:
   1155   case CURLOPT_KEYPASSWD:
   1156   case CURLOPT_KRBLEVEL:
   1157   case CURLOPT_LOGIN_OPTIONS:
   1158   case CURLOPT_MAIL_AUTH:
   1159   case CURLOPT_MAIL_FROM:
   1160   case CURLOPT_NETRC_FILE:
   1161   case CURLOPT_NOPROXY:
   1162   case CURLOPT_PASSWORD:
   1163   case CURLOPT_PINNEDPUBLICKEY:
   1164   case CURLOPT_PROXY:
   1165   case CURLOPT_PROXYPASSWORD:
   1166   case CURLOPT_PROXYUSERNAME:
   1167   case CURLOPT_PROXYUSERPWD:
   1168   case CURLOPT_PROXY_CAINFO:
   1169   case CURLOPT_PROXY_CAPATH:
   1170   case CURLOPT_PROXY_CRLFILE:
   1171   case CURLOPT_PROXY_KEYPASSWD:
   1172   case CURLOPT_PROXY_SERVICE_NAME:
   1173   case CURLOPT_PROXY_SSLCERT:
   1174   case CURLOPT_PROXY_SSLCERTTYPE:
   1175   case CURLOPT_PROXY_SSLKEY:
   1176   case CURLOPT_PROXY_SSLKEYTYPE:
   1177   case CURLOPT_PROXY_SSL_CIPHER_LIST:
   1178   case CURLOPT_PROXY_TLSAUTH_PASSWORD:
   1179   case CURLOPT_PROXY_TLSAUTH_TYPE:
   1180   case CURLOPT_PROXY_TLSAUTH_USERNAME:
   1181   case CURLOPT_RANDOM_FILE:
   1182   case CURLOPT_RANGE:
   1183   case CURLOPT_REFERER:
   1184   case CURLOPT_RTSP_SESSION_ID:
   1185   case CURLOPT_RTSP_STREAM_URI:
   1186   case CURLOPT_RTSP_TRANSPORT:
   1187   case CURLOPT_SERVICE_NAME:
   1188   case CURLOPT_SOCKS5_GSSAPI_SERVICE:
   1189   case CURLOPT_SOCKS_PROXY:
   1190   case CURLOPT_SSH_HOST_PUBLIC_KEY_MD5:
   1191   case CURLOPT_SSH_KNOWNHOSTS:
   1192   case CURLOPT_SSH_PRIVATE_KEYFILE:
   1193   case CURLOPT_SSH_PUBLIC_KEYFILE:
   1194   case CURLOPT_SSLCERT:
   1195   case CURLOPT_SSLCERTTYPE:
   1196   case CURLOPT_SSLENGINE:
   1197   case CURLOPT_SSLKEY:
   1198   case CURLOPT_SSLKEYTYPE:
   1199   case CURLOPT_SSL_CIPHER_LIST:
   1200   case CURLOPT_TLSAUTH_PASSWORD:
   1201   case CURLOPT_TLSAUTH_TYPE:
   1202   case CURLOPT_TLSAUTH_USERNAME:
   1203   case CURLOPT_UNIX_SOCKET_PATH:
   1204   case CURLOPT_URL:
   1205   case CURLOPT_USERAGENT:
   1206   case CURLOPT_USERNAME:
   1207   case CURLOPT_USERPWD:
   1208   case CURLOPT_XOAUTH2_BEARER:
   1209     s = va_arg(arg, char *);
   1210     ccsid = va_arg(arg, unsigned int);
   1211 
   1212     if(s) {
   1213       s = dynconvert(ASCII_CCSID, s, -1, ccsid);
   1214 
   1215       if(!s) {
   1216         result = CURLE_OUT_OF_MEMORY;
   1217         break;
   1218         }
   1219       }
   1220 
   1221     result = curl_easy_setopt(curl, tag, s);
   1222     free(s);
   1223     break;
   1224 
   1225   case CURLOPT_COPYPOSTFIELDS:
   1226     /* Special case: byte count may have been given by CURLOPT_POSTFIELDSIZE
   1227        prior to this call. In this case, convert the given byte count and
   1228        replace the length according to the conversion result. */
   1229     s = va_arg(arg, char *);
   1230     ccsid = va_arg(arg, unsigned int);
   1231 
   1232     pfsize = data->set.postfieldsize;
   1233 
   1234     if(!s || !pfsize || ccsid == NOCONV_CCSID || ccsid == ASCII_CCSID) {
   1235       result = curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, s);
   1236       break;
   1237       }
   1238 
   1239     if(pfsize == -1) {
   1240       /* Data is null-terminated. */
   1241       s = dynconvert(ASCII_CCSID, s, -1, ccsid);
   1242 
   1243       if(!s) {
   1244         result = CURLE_OUT_OF_MEMORY;
   1245         break;
   1246         }
   1247       }
   1248     else {
   1249       /* Data length specified. */
   1250       size_t len;
   1251 
   1252       if(pfsize < 0 || pfsize > SIZE_MAX) {
   1253         result = CURLE_OUT_OF_MEMORY;
   1254         break;
   1255         }
   1256 
   1257       len = pfsize;
   1258       pfsize = len * MAX_CONV_EXPANSION;
   1259 
   1260       if(pfsize > SIZE_MAX)
   1261         pfsize = SIZE_MAX;
   1262 
   1263       cp = malloc(pfsize);
   1264 
   1265       if(!cp) {
   1266         result = CURLE_OUT_OF_MEMORY;
   1267         break;
   1268         }
   1269 
   1270       pfsize = convert(cp, pfsize, ASCII_CCSID, s, len, ccsid);
   1271 
   1272       if(pfsize < 0) {
   1273         free(cp);
   1274         result = CURLE_OUT_OF_MEMORY;
   1275         break;
   1276         }
   1277 
   1278       data->set.postfieldsize = pfsize;         /* Replace data size. */
   1279       s = cp;
   1280       }
   1281 
   1282     result = curl_easy_setopt(curl, CURLOPT_POSTFIELDS, s);
   1283     data->set.str[STRING_COPYPOSTFIELDS] = s;   /* Give to library. */
   1284     break;
   1285 
   1286   case CURLOPT_ERRORBUFFER:                     /* This is an output buffer. */
   1287   default:
   1288     result = Curl_setopt(data, tag, arg);
   1289     break;
   1290     }
   1291 
   1292   va_end(arg);
   1293   return result;
   1294 }
   1295 
   1296 
   1297 char *
   1298 curl_form_long_value(long value)
   1299 
   1300 {
   1301   /* ILE/RPG cannot cast an integer to a pointer. This procedure does it. */
   1302 
   1303   return (char *) value;
   1304 }
   1305 
   1306 
   1307 char *
   1308 curl_pushheader_bynum_cssid(struct curl_pushheaders *h,
   1309                             size_t num, unsigned int ccsid)
   1310 
   1311 {
   1312   char *d = (char *) NULL;
   1313   char *s = curl_pushheader_bynum(h, num);
   1314 
   1315   if(s)
   1316     d = dynconvert(ccsid, s, -1, ASCII_CCSID);
   1317 
   1318   return d;
   1319 }
   1320 
   1321 
   1322 char *
   1323 curl_pushheader_byname_ccsid(struct curl_pushheaders *h, const char *header,
   1324                              unsigned int ccsidin, unsigned int ccsidout)
   1325 
   1326 {
   1327   char *d = (char *) NULL;
   1328   char *s;
   1329 
   1330   if(header) {
   1331     header = dynconvert(ASCII_CCSID, header, -1, ccsidin);
   1332 
   1333     if(header) {
   1334       s = curl_pushheader_byname(h, header);
   1335       free((char *) header);
   1336 
   1337       if(s)
   1338         d = dynconvert(ccsidout, s, -1, ASCII_CCSID);
   1339     }
   1340   }
   1341 
   1342   return d;
   1343 }
   1344