1 #ifndef __CURL_CURL_H
2 #define __CURL_CURL_H
3 /***************************************************************************
4  *                                  _   _ ____  _
5  *  Project                     ___| | | |  _ \| |
6  *                             / __| | | | |_) | |
7  *                            | (__| |_| |  _ <| |___
8  *                             \___|\___/|_| \_\_____|
9  *
10  * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
11  *
12  * This software is licensed as described in the file COPYING, which
13  * you should have received as part of this distribution. The terms
14  * are also available at https://curl.haxx.se/docs/copyright.html.
15  *
16  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17  * copies of the Software, and permit persons to whom the Software is
18  * furnished to do so, under the terms of the COPYING file.
19  *
20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21  * KIND, either express or implied.
22  *
23  ***************************************************************************/
24 
25 /*
26  * If you have libcurl problems, all docs and details are found here:
27  *   https://curl.haxx.se/libcurl/
28  *
29  * curl-library mailing list subscription and unsubscription web interface:
30  *   https://cool.haxx.se/mailman/listinfo/curl-library/
31  */
32 
33 #ifdef CURL_NO_OLDIES
34 #define CURL_STRICTER
35 #endif
36 
37 #include "curlver.h"         /* libcurl version defines   */
38 #include "system.h"          /* determine things run-time */
39 
40 /*
41  * Define WIN32 when build target is Win32 API
42  */
43 
44 #if (defined(_WIN32) || defined(__WIN32__)) && \
45      !defined(WIN32) && !defined(__SYMBIAN32__)
46 #define WIN32
47 #endif
48 
49 #include <stdio.h>
50 #include <limits.h>
51 
52 #if defined(__FreeBSD__) && (__FreeBSD__ >= 2)
53 /* Needed for __FreeBSD_version symbol definition */
54 #include <osreldate.h>
55 #endif
56 
57 /* The include stuff here below is mainly for time_t! */
58 #include <sys/types.h>
59 #include <time.h>
60 
61 #if defined(WIN32) && !defined(_WIN32_WCE) && !defined(__CYGWIN__)
62 #if !(defined(_WINSOCKAPI_) || defined(_WINSOCK_H) || \
63       defined(__LWIP_OPT_H__) || defined(LWIP_HDR_OPT_H))
64 /* The check above prevents the winsock2 inclusion if winsock.h already was
65    included, since they can't co-exist without problems */
66 #include <winsock2.h>
67 #include <ws2tcpip.h>
68 #endif
69 #endif
70 
71 /* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
72    libc5-based Linux systems. Only include it on systems that are known to
73    require it! */
74 #if defined(_AIX) || defined(__NOVELL_LIBC__) || defined(__NetBSD__) || \
75     defined(__minix) || defined(__SYMBIAN32__) || defined(__INTEGRITY) || \
76     defined(ANDROID) || defined(__ANDROID__) || defined(__OpenBSD__) || \
77     defined(__CYGWIN__) || \
78    (defined(__FreeBSD_version) && (__FreeBSD_version < 800000))
79 #include <sys/select.h>
80 #endif
81 
82 #if !defined(WIN32) && !defined(_WIN32_WCE)
83 #include <sys/socket.h>
84 #endif
85 
86 #if !defined(WIN32) && !defined(__WATCOMC__) && !defined(__VXWORKS__)
87 #include <sys/time.h>
88 #endif
89 
90 #ifdef __BEOS__
91 #include <support/SupportDefs.h>
92 #endif
93 
94 #ifdef  __cplusplus
95 extern "C" {
96 #endif
97 
98 #if defined(BUILDING_LIBCURL) || defined(CURL_STRICTER)
99 typedef struct Curl_easy CURL;
100 typedef struct Curl_share CURLSH;
101 #else
102 typedef void CURL;
103 typedef void CURLSH;
104 #endif
105 
106 /*
107  * libcurl external API function linkage decorations.
108  */
109 
110 #ifdef CURL_STATICLIB
111 #  define CURL_EXTERN
112 #elif defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__)
113 #  if defined(BUILDING_LIBCURL)
114 #    define CURL_EXTERN  __declspec(dllexport)
115 #  else
116 #    define CURL_EXTERN  __declspec(dllimport)
117 #  endif
118 #elif defined(BUILDING_LIBCURL) && defined(CURL_HIDDEN_SYMBOLS)
119 #  define CURL_EXTERN CURL_EXTERN_SYMBOL
120 #else
121 #  define CURL_EXTERN
122 #endif
123 
124 #ifndef curl_socket_typedef
125 /* socket typedef */
126 #if defined(WIN32) && !defined(__LWIP_OPT_H__) && !defined(LWIP_HDR_OPT_H)
127 typedef SOCKET curl_socket_t;
128 #define CURL_SOCKET_BAD INVALID_SOCKET
129 #else
130 typedef int curl_socket_t;
131 #define CURL_SOCKET_BAD -1
132 #endif
133 #define curl_socket_typedef
134 #endif /* curl_socket_typedef */
135 
136 /* enum for the different supported SSL backends */
137 typedef enum {
138   CURLSSLBACKEND_NONE = 0,
139   CURLSSLBACKEND_OPENSSL = 1,
140   CURLSSLBACKEND_GNUTLS = 2,
141   CURLSSLBACKEND_NSS = 3,
142   CURLSSLBACKEND_OBSOLETE4 = 4,  /* Was QSOSSL. */
143   CURLSSLBACKEND_GSKIT = 5,
144   CURLSSLBACKEND_POLARSSL = 6,
145   CURLSSLBACKEND_WOLFSSL = 7,
146   CURLSSLBACKEND_SCHANNEL = 8,
147   CURLSSLBACKEND_DARWINSSL = 9,
148   CURLSSLBACKEND_AXTLS = 10,
149   CURLSSLBACKEND_MBEDTLS = 11
150 } curl_sslbackend;
151 
152 /* aliases for library clones and renames */
153 #define CURLSSLBACKEND_LIBRESSL CURLSSLBACKEND_OPENSSL
154 #define CURLSSLBACKEND_BORINGSSL CURLSSLBACKEND_OPENSSL
155 #define CURLSSLBACKEND_CYASSL CURLSSLBACKEND_WOLFSSL
156 
157 struct curl_httppost {
158   struct curl_httppost *next;       /* next entry in the list */
159   char *name;                       /* pointer to allocated name */
160   long namelength;                  /* length of name length */
161   char *contents;                   /* pointer to allocated data contents */
162   long contentslength;              /* length of contents field, see also
163                                        CURL_HTTPPOST_LARGE */
164   char *buffer;                     /* pointer to allocated buffer contents */
165   long bufferlength;                /* length of buffer field */
166   char *contenttype;                /* Content-Type */
167   struct curl_slist *contentheader; /* list of extra headers for this form */
168   struct curl_httppost *more;       /* if one field name has more than one
169                                        file, this link should link to following
170                                        files */
171   long flags;                       /* as defined below */
172 
173 /* specified content is a file name */
174 #define CURL_HTTPPOST_FILENAME (1<<0)
175 /* specified content is a file name */
176 #define CURL_HTTPPOST_READFILE (1<<1)
177 /* name is only stored pointer do not free in formfree */
178 #define CURL_HTTPPOST_PTRNAME (1<<2)
179 /* contents is only stored pointer do not free in formfree */
180 #define CURL_HTTPPOST_PTRCONTENTS (1<<3)
181 /* upload file from buffer */
182 #define CURL_HTTPPOST_BUFFER (1<<4)
183 /* upload file from pointer contents */
184 #define CURL_HTTPPOST_PTRBUFFER (1<<5)
185 /* upload file contents by using the regular read callback to get the data and
186    pass the given pointer as custom pointer */
187 #define CURL_HTTPPOST_CALLBACK (1<<6)
188 /* use size in 'contentlen', added in 7.46.0 */
189 #define CURL_HTTPPOST_LARGE (1<<7)
190 
191   char *showfilename;               /* The file name to show. If not set, the
192                                        actual file name will be used (if this
193                                        is a file part) */
194   void *userp;                      /* custom pointer used for
195                                        HTTPPOST_CALLBACK posts */
196   curl_off_t contentlen;            /* alternative length of contents
197                                        field. Used if CURL_HTTPPOST_LARGE is
198                                        set. Added in 7.46.0 */
199 };
200 
201 /* This is the CURLOPT_PROGRESSFUNCTION callback proto. It is now considered
202    deprecated but was the only choice up until 7.31.0 */
203 typedef int (*curl_progress_callback)(void *clientp,
204                                       double dltotal,
205                                       double dlnow,
206                                       double ultotal,
207                                       double ulnow);
208 
209 /* This is the CURLOPT_XFERINFOFUNCTION callback proto. It was introduced in
210    7.32.0, it avoids floating point and provides more detailed information. */
211 typedef int (*curl_xferinfo_callback)(void *clientp,
212                                       curl_off_t dltotal,
213                                       curl_off_t dlnow,
214                                       curl_off_t ultotal,
215                                       curl_off_t ulnow);
216 
217 #ifndef CURL_MAX_READ_SIZE
218   /* The maximum receive buffer size configurable via CURLOPT_BUFFERSIZE. */
219 #define CURL_MAX_READ_SIZE 524288
220 #endif
221 
222 #ifndef CURL_MAX_WRITE_SIZE
223   /* Tests have proven that 20K is a very bad buffer size for uploads on
224      Windows, while 16K for some odd reason performed a lot better.
225      We do the ifndef check to allow this value to easier be changed at build
226      time for those who feel adventurous. The practical minimum is about
227      400 bytes since libcurl uses a buffer of this size as a scratch area
228      (unrelated to network send operations). */
229 #define CURL_MAX_WRITE_SIZE 16384
230 #endif
231 
232 #ifndef CURL_MAX_HTTP_HEADER
233 /* The only reason to have a max limit for this is to avoid the risk of a bad
234    server feeding libcurl with a never-ending header that will cause reallocs
235    infinitely */
236 #define CURL_MAX_HTTP_HEADER (100*1024)
237 #endif
238 
239 /* This is a magic return code for the write callback that, when returned,
240    will signal libcurl to pause receiving on the current transfer. */
241 #define CURL_WRITEFUNC_PAUSE 0x10000001
242 
243 typedef size_t (*curl_write_callback)(char *buffer,
244                                       size_t size,
245                                       size_t nitems,
246                                       void *outstream);
247 
248 /* This callback will be called when a new resolver request is made */
249 typedef int (*curl_resolver_start_callback)(void *resolver_state,
250                                             void *reserved, void *userdata);
251 
252 /* enumeration of file types */
253 typedef enum {
254   CURLFILETYPE_FILE = 0,
255   CURLFILETYPE_DIRECTORY,
256   CURLFILETYPE_SYMLINK,
257   CURLFILETYPE_DEVICE_BLOCK,
258   CURLFILETYPE_DEVICE_CHAR,
259   CURLFILETYPE_NAMEDPIPE,
260   CURLFILETYPE_SOCKET,
261   CURLFILETYPE_DOOR, /* is possible only on Sun Solaris now */
262 
263   CURLFILETYPE_UNKNOWN /* should never occur */
264 } curlfiletype;
265 
266 #define CURLFINFOFLAG_KNOWN_FILENAME    (1<<0)
267 #define CURLFINFOFLAG_KNOWN_FILETYPE    (1<<1)
268 #define CURLFINFOFLAG_KNOWN_TIME        (1<<2)
269 #define CURLFINFOFLAG_KNOWN_PERM        (1<<3)
270 #define CURLFINFOFLAG_KNOWN_UID         (1<<4)
271 #define CURLFINFOFLAG_KNOWN_GID         (1<<5)
272 #define CURLFINFOFLAG_KNOWN_SIZE        (1<<6)
273 #define CURLFINFOFLAG_KNOWN_HLINKCOUNT  (1<<7)
274 
275 /* Content of this structure depends on information which is known and is
276    achievable (e.g. by FTP LIST parsing). Please see the url_easy_setopt(3) man
277    page for callbacks returning this structure -- some fields are mandatory,
278    some others are optional. The FLAG field has special meaning. */
279 struct curl_fileinfo {
280   char *filename;
281   curlfiletype filetype;
282   time_t time;
283   unsigned int perm;
284   int uid;
285   int gid;
286   curl_off_t size;
287   long int hardlinks;
288 
289   struct {
290     /* If some of these fields is not NULL, it is a pointer to b_data. */
291     char *time;
292     char *perm;
293     char *user;
294     char *group;
295     char *target; /* pointer to the target filename of a symlink */
296   } strings;
297 
298   unsigned int flags;
299 
300   /* used internally */
301   char *b_data;
302   size_t b_size;
303   size_t b_used;
304 };
305 
306 /* return codes for CURLOPT_CHUNK_BGN_FUNCTION */
307 #define CURL_CHUNK_BGN_FUNC_OK      0
308 #define CURL_CHUNK_BGN_FUNC_FAIL    1 /* tell the lib to end the task */
309 #define CURL_CHUNK_BGN_FUNC_SKIP    2 /* skip this chunk over */
310 
311 /* if splitting of data transfer is enabled, this callback is called before
312    download of an individual chunk started. Note that parameter "remains" works
313    only for FTP wildcard downloading (for now), otherwise is not used */
314 typedef long (*curl_chunk_bgn_callback)(const void *transfer_info,
315                                         void *ptr,
316                                         int remains);
317 
318 /* return codes for CURLOPT_CHUNK_END_FUNCTION */
319 #define CURL_CHUNK_END_FUNC_OK      0
320 #define CURL_CHUNK_END_FUNC_FAIL    1 /* tell the lib to end the task */
321 
322 /* If splitting of data transfer is enabled this callback is called after
323    download of an individual chunk finished.
324    Note! After this callback was set then it have to be called FOR ALL chunks.
325    Even if downloading of this chunk was skipped in CHUNK_BGN_FUNC.
326    This is the reason why we don't need "transfer_info" parameter in this
327    callback and we are not interested in "remains" parameter too. */
328 typedef long (*curl_chunk_end_callback)(void *ptr);
329 
330 /* return codes for FNMATCHFUNCTION */
331 #define CURL_FNMATCHFUNC_MATCH    0 /* string corresponds to the pattern */
332 #define CURL_FNMATCHFUNC_NOMATCH  1 /* pattern doesn't match the string */
333 #define CURL_FNMATCHFUNC_FAIL     2 /* an error occurred */
334 
335 /* callback type for wildcard downloading pattern matching. If the
336    string matches the pattern, return CURL_FNMATCHFUNC_MATCH value, etc. */
337 typedef int (*curl_fnmatch_callback)(void *ptr,
338                                      const char *pattern,
339                                      const char *string);
340 
341 /* These are the return codes for the seek callbacks */
342 #define CURL_SEEKFUNC_OK       0
343 #define CURL_SEEKFUNC_FAIL     1 /* fail the entire transfer */
344 #define CURL_SEEKFUNC_CANTSEEK 2 /* tell libcurl seeking can't be done, so
345                                     libcurl might try other means instead */
346 typedef int (*curl_seek_callback)(void *instream,
347                                   curl_off_t offset,
348                                   int origin); /* 'whence' */
349 
350 /* This is a return code for the read callback that, when returned, will
351    signal libcurl to immediately abort the current transfer. */
352 #define CURL_READFUNC_ABORT 0x10000000
353 /* This is a return code for the read callback that, when returned, will
354    signal libcurl to pause sending data on the current transfer. */
355 #define CURL_READFUNC_PAUSE 0x10000001
356 
357 typedef size_t (*curl_read_callback)(char *buffer,
358                                       size_t size,
359                                       size_t nitems,
360                                       void *instream);
361 
362 typedef enum {
363   CURLSOCKTYPE_IPCXN,  /* socket created for a specific IP connection */
364   CURLSOCKTYPE_ACCEPT, /* socket created by accept() call */
365   CURLSOCKTYPE_LAST    /* never use */
366 } curlsocktype;
367 
368 /* The return code from the sockopt_callback can signal information back
369    to libcurl: */
370 #define CURL_SOCKOPT_OK 0
371 #define CURL_SOCKOPT_ERROR 1 /* causes libcurl to abort and return
372                                 CURLE_ABORTED_BY_CALLBACK */
373 #define CURL_SOCKOPT_ALREADY_CONNECTED 2
374 
375 typedef int (*curl_sockopt_callback)(void *clientp,
376                                      curl_socket_t curlfd,
377                                      curlsocktype purpose);
378 
379 struct curl_sockaddr {
380   int family;
381   int socktype;
382   int protocol;
383   unsigned int addrlen; /* addrlen was a socklen_t type before 7.18.0 but it
384                            turned really ugly and painful on the systems that
385                            lack this type */
386   struct sockaddr addr;
387 };
388 
389 typedef curl_socket_t
390 (*curl_opensocket_callback)(void *clientp,
391                             curlsocktype purpose,
392                             struct curl_sockaddr *address);
393 
394 typedef int
395 (*curl_closesocket_callback)(void *clientp, curl_socket_t item);
396 
397 typedef enum {
398   CURLIOE_OK,            /* I/O operation successful */
399   CURLIOE_UNKNOWNCMD,    /* command was unknown to callback */
400   CURLIOE_FAILRESTART,   /* failed to restart the read */
401   CURLIOE_LAST           /* never use */
402 } curlioerr;
403 
404 typedef enum {
405   CURLIOCMD_NOP,         /* no operation */
406   CURLIOCMD_RESTARTREAD, /* restart the read stream from start */
407   CURLIOCMD_LAST         /* never use */
408 } curliocmd;
409 
410 typedef curlioerr (*curl_ioctl_callback)(CURL *handle,
411                                          int cmd,
412                                          void *clientp);
413 
414 #ifndef CURL_DID_MEMORY_FUNC_TYPEDEFS
415 /*
416  * The following typedef's are signatures of malloc, free, realloc, strdup and
417  * calloc respectively.  Function pointers of these types can be passed to the
418  * curl_global_init_mem() function to set user defined memory management
419  * callback routines.
420  */
421 typedef void *(*curl_malloc_callback)(size_t size);
422 typedef void (*curl_free_callback)(void *ptr);
423 typedef void *(*curl_realloc_callback)(void *ptr, size_t size);
424 typedef char *(*curl_strdup_callback)(const char *str);
425 typedef void *(*curl_calloc_callback)(size_t nmemb, size_t size);
426 
427 #define CURL_DID_MEMORY_FUNC_TYPEDEFS
428 #endif
429 
430 /* the kind of data that is passed to information_callback*/
431 typedef enum {
432   CURLINFO_TEXT = 0,
433   CURLINFO_HEADER_IN,    /* 1 */
434   CURLINFO_HEADER_OUT,   /* 2 */
435   CURLINFO_DATA_IN,      /* 3 */
436   CURLINFO_DATA_OUT,     /* 4 */
437   CURLINFO_SSL_DATA_IN,  /* 5 */
438   CURLINFO_SSL_DATA_OUT, /* 6 */
439   CURLINFO_END
440 } curl_infotype;
441 
442 typedef int (*curl_debug_callback)
443        (CURL *handle,      /* the handle/transfer this concerns */
444         curl_infotype type, /* what kind of data */
445         char *data,        /* points to the data */
446         size_t size,       /* size of the data pointed to */
447         void *userptr);    /* whatever the user please */
448 
449 /* All possible error codes from all sorts of curl functions. Future versions
450    may return other values, stay prepared.
451 
452    Always add new return codes last. Never *EVER* remove any. The return
453    codes must remain the same!
454  */
455 
456 typedef enum {
457   CURLE_OK = 0,
458   CURLE_UNSUPPORTED_PROTOCOL,    /* 1 */
459   CURLE_FAILED_INIT,             /* 2 */
460   CURLE_URL_MALFORMAT,           /* 3 */
461   CURLE_NOT_BUILT_IN,            /* 4 - [was obsoleted in August 2007 for
462                                     7.17.0, reused in April 2011 for 7.21.5] */
463   CURLE_COULDNT_RESOLVE_PROXY,   /* 5 */
464   CURLE_COULDNT_RESOLVE_HOST,    /* 6 */
465   CURLE_COULDNT_CONNECT,         /* 7 */
466   CURLE_WEIRD_SERVER_REPLY,      /* 8 */
467   CURLE_REMOTE_ACCESS_DENIED,    /* 9 a service was denied by the server
468                                     due to lack of access - when login fails
469                                     this is not returned. */
470   CURLE_FTP_ACCEPT_FAILED,       /* 10 - [was obsoleted in April 2006 for
471                                     7.15.4, reused in Dec 2011 for 7.24.0]*/
472   CURLE_FTP_WEIRD_PASS_REPLY,    /* 11 */
473   CURLE_FTP_ACCEPT_TIMEOUT,      /* 12 - timeout occurred accepting server
474                                     [was obsoleted in August 2007 for 7.17.0,
475                                     reused in Dec 2011 for 7.24.0]*/
476   CURLE_FTP_WEIRD_PASV_REPLY,    /* 13 */
477   CURLE_FTP_WEIRD_227_FORMAT,    /* 14 */
478   CURLE_FTP_CANT_GET_HOST,       /* 15 */
479   CURLE_HTTP2,                   /* 16 - A problem in the http2 framing layer.
480                                     [was obsoleted in August 2007 for 7.17.0,
481                                     reused in July 2014 for 7.38.0] */
482   CURLE_FTP_COULDNT_SET_TYPE,    /* 17 */
483   CURLE_PARTIAL_FILE,            /* 18 */
484   CURLE_FTP_COULDNT_RETR_FILE,   /* 19 */
485   CURLE_OBSOLETE20,              /* 20 - NOT USED */
486   CURLE_QUOTE_ERROR,             /* 21 - quote command failure */
487   CURLE_HTTP_RETURNED_ERROR,     /* 22 */
488   CURLE_WRITE_ERROR,             /* 23 */
489   CURLE_OBSOLETE24,              /* 24 - NOT USED */
490   CURLE_UPLOAD_FAILED,           /* 25 - failed upload "command" */
491   CURLE_READ_ERROR,              /* 26 - couldn't open/read from file */
492   CURLE_OUT_OF_MEMORY,           /* 27 */
493   /* Note: CURLE_OUT_OF_MEMORY may sometimes indicate a conversion error
494            instead of a memory allocation error if CURL_DOES_CONVERSIONS
495            is defined
496   */
497   CURLE_OPERATION_TIMEDOUT,      /* 28 - the timeout time was reached */
498   CURLE_OBSOLETE29,              /* 29 - NOT USED */
499   CURLE_FTP_PORT_FAILED,         /* 30 - FTP PORT operation failed */
500   CURLE_FTP_COULDNT_USE_REST,    /* 31 - the REST command failed */
501   CURLE_OBSOLETE32,              /* 32 - NOT USED */
502   CURLE_RANGE_ERROR,             /* 33 - RANGE "command" didn't work */
503   CURLE_HTTP_POST_ERROR,         /* 34 */
504   CURLE_SSL_CONNECT_ERROR,       /* 35 - wrong when connecting with SSL */
505   CURLE_BAD_DOWNLOAD_RESUME,     /* 36 - couldn't resume download */
506   CURLE_FILE_COULDNT_READ_FILE,  /* 37 */
507   CURLE_LDAP_CANNOT_BIND,        /* 38 */
508   CURLE_LDAP_SEARCH_FAILED,      /* 39 */
509   CURLE_OBSOLETE40,              /* 40 - NOT USED */
510   CURLE_FUNCTION_NOT_FOUND,      /* 41 - NOT USED starting with 7.53.0 */
511   CURLE_ABORTED_BY_CALLBACK,     /* 42 */
512   CURLE_BAD_FUNCTION_ARGUMENT,   /* 43 */
513   CURLE_OBSOLETE44,              /* 44 - NOT USED */
514   CURLE_INTERFACE_FAILED,        /* 45 - CURLOPT_INTERFACE failed */
515   CURLE_OBSOLETE46,              /* 46 - NOT USED */
516   CURLE_TOO_MANY_REDIRECTS,      /* 47 - catch endless re-direct loops */
517   CURLE_UNKNOWN_OPTION,          /* 48 - User specified an unknown option */
518   CURLE_TELNET_OPTION_SYNTAX,    /* 49 - Malformed telnet option */
519   CURLE_OBSOLETE50,              /* 50 - NOT USED */
520   CURLE_PEER_FAILED_VERIFICATION, /* 51 - peer's certificate or fingerprint
521                                      wasn't verified fine */
522   CURLE_GOT_NOTHING,             /* 52 - when this is a specific error */
523   CURLE_SSL_ENGINE_NOTFOUND,     /* 53 - SSL crypto engine not found */
524   CURLE_SSL_ENGINE_SETFAILED,    /* 54 - can not set SSL crypto engine as
525                                     default */
526   CURLE_SEND_ERROR,              /* 55 - failed sending network data */
527   CURLE_RECV_ERROR,              /* 56 - failure in receiving network data */
528   CURLE_OBSOLETE57,              /* 57 - NOT IN USE */
529   CURLE_SSL_CERTPROBLEM,         /* 58 - problem with the local certificate */
530   CURLE_SSL_CIPHER,              /* 59 - couldn't use specified cipher */
531   CURLE_SSL_CACERT,              /* 60 - problem with the CA cert (path?) */
532   CURLE_BAD_CONTENT_ENCODING,    /* 61 - Unrecognized/bad encoding */
533   CURLE_LDAP_INVALID_URL,        /* 62 - Invalid LDAP URL */
534   CURLE_FILESIZE_EXCEEDED,       /* 63 - Maximum file size exceeded */
535   CURLE_USE_SSL_FAILED,          /* 64 - Requested FTP SSL level failed */
536   CURLE_SEND_FAIL_REWIND,        /* 65 - Sending the data requires a rewind
537                                     that failed */
538   CURLE_SSL_ENGINE_INITFAILED,   /* 66 - failed to initialise ENGINE */
539   CURLE_LOGIN_DENIED,            /* 67 - user, password or similar was not
540                                     accepted and we failed to login */
541   CURLE_TFTP_NOTFOUND,           /* 68 - file not found on server */
542   CURLE_TFTP_PERM,               /* 69 - permission problem on server */
543   CURLE_REMOTE_DISK_FULL,        /* 70 - out of disk space on server */
544   CURLE_TFTP_ILLEGAL,            /* 71 - Illegal TFTP operation */
545   CURLE_TFTP_UNKNOWNID,          /* 72 - Unknown transfer ID */
546   CURLE_REMOTE_FILE_EXISTS,      /* 73 - File already exists */
547   CURLE_TFTP_NOSUCHUSER,         /* 74 - No such user */
548   CURLE_CONV_FAILED,             /* 75 - conversion failed */
549   CURLE_CONV_REQD,               /* 76 - caller must register conversion
550                                     callbacks using curl_easy_setopt options
551                                     CURLOPT_CONV_FROM_NETWORK_FUNCTION,
552                                     CURLOPT_CONV_TO_NETWORK_FUNCTION, and
553                                     CURLOPT_CONV_FROM_UTF8_FUNCTION */
554   CURLE_SSL_CACERT_BADFILE,      /* 77 - could not load CACERT file, missing
555                                     or wrong format */
556   CURLE_REMOTE_FILE_NOT_FOUND,   /* 78 - remote file not found */
557   CURLE_SSH,                     /* 79 - error from the SSH layer, somewhat
558                                     generic so the error message will be of
559                                     interest when this has happened */
560 
561   CURLE_SSL_SHUTDOWN_FAILED,     /* 80 - Failed to shut down the SSL
562                                     connection */
563   CURLE_AGAIN,                   /* 81 - socket is not ready for send/recv,
564                                     wait till it's ready and try again (Added
565                                     in 7.18.2) */
566   CURLE_SSL_CRL_BADFILE,         /* 82 - could not load CRL file, missing or
567                                     wrong format (Added in 7.19.0) */
568   CURLE_SSL_ISSUER_ERROR,        /* 83 - Issuer check failed.  (Added in
569                                     7.19.0) */
570   CURLE_FTP_PRET_FAILED,         /* 84 - a PRET command failed */
571   CURLE_RTSP_CSEQ_ERROR,         /* 85 - mismatch of RTSP CSeq numbers */
572   CURLE_RTSP_SESSION_ERROR,      /* 86 - mismatch of RTSP Session Ids */
573   CURLE_FTP_BAD_FILE_LIST,       /* 87 - unable to parse FTP file list */
574   CURLE_CHUNK_FAILED,            /* 88 - chunk callback reported error */
575   CURLE_NO_CONNECTION_AVAILABLE, /* 89 - No connection available, the
576                                     session will be queued */
577   CURLE_SSL_PINNEDPUBKEYNOTMATCH, /* 90 - specified pinned public key did not
578                                      match */
579   CURLE_SSL_INVALIDCERTSTATUS,   /* 91 - invalid certificate status */
580   CURLE_HTTP2_STREAM,            /* 92 - stream error in HTTP/2 framing layer
581                                     */
582   CURLE_RECURSIVE_API_CALL,      /* 93 - an api function was called from
583                                     inside a callback */
584   CURL_LAST /* never use! */
585 } CURLcode;
586 
587 #ifndef CURL_NO_OLDIES /* define this to test if your app builds with all
588                           the obsolete stuff removed! */
589 
590 /* Previously obsolete error code re-used in 7.38.0 */
591 #define CURLE_OBSOLETE16 CURLE_HTTP2
592 
593 /* Previously obsolete error codes re-used in 7.24.0 */
594 #define CURLE_OBSOLETE10 CURLE_FTP_ACCEPT_FAILED
595 #define CURLE_OBSOLETE12 CURLE_FTP_ACCEPT_TIMEOUT
596 
597 /*  compatibility with older names */
598 #define CURLOPT_ENCODING CURLOPT_ACCEPT_ENCODING
599 #define CURLE_FTP_WEIRD_SERVER_REPLY CURLE_WEIRD_SERVER_REPLY
600 
601 /* The following were added in 7.21.5, April 2011 */
602 #define CURLE_UNKNOWN_TELNET_OPTION CURLE_UNKNOWN_OPTION
603 
604 /* The following were added in 7.17.1 */
605 /* These are scheduled to disappear by 2009 */
606 #define CURLE_SSL_PEER_CERTIFICATE CURLE_PEER_FAILED_VERIFICATION
607 
608 /* The following were added in 7.17.0 */
609 /* These are scheduled to disappear by 2009 */
610 #define CURLE_OBSOLETE CURLE_OBSOLETE50 /* no one should be using this! */
611 #define CURLE_BAD_PASSWORD_ENTERED CURLE_OBSOLETE46
612 #define CURLE_BAD_CALLING_ORDER CURLE_OBSOLETE44
613 #define CURLE_FTP_USER_PASSWORD_INCORRECT CURLE_OBSOLETE10
614 #define CURLE_FTP_CANT_RECONNECT CURLE_OBSOLETE16
615 #define CURLE_FTP_COULDNT_GET_SIZE CURLE_OBSOLETE32
616 #define CURLE_FTP_COULDNT_SET_ASCII CURLE_OBSOLETE29
617 #define CURLE_FTP_WEIRD_USER_REPLY CURLE_OBSOLETE12
618 #define CURLE_FTP_WRITE_ERROR CURLE_OBSOLETE20
619 #define CURLE_LIBRARY_NOT_FOUND CURLE_OBSOLETE40
620 #define CURLE_MALFORMAT_USER CURLE_OBSOLETE24
621 #define CURLE_SHARE_IN_USE CURLE_OBSOLETE57
622 #define CURLE_URL_MALFORMAT_USER CURLE_NOT_BUILT_IN
623 
624 #define CURLE_FTP_ACCESS_DENIED CURLE_REMOTE_ACCESS_DENIED
625 #define CURLE_FTP_COULDNT_SET_BINARY CURLE_FTP_COULDNT_SET_TYPE
626 #define CURLE_FTP_QUOTE_ERROR CURLE_QUOTE_ERROR
627 #define CURLE_TFTP_DISKFULL CURLE_REMOTE_DISK_FULL
628 #define CURLE_TFTP_EXISTS CURLE_REMOTE_FILE_EXISTS
629 #define CURLE_HTTP_RANGE_ERROR CURLE_RANGE_ERROR
630 #define CURLE_FTP_SSL_FAILED CURLE_USE_SSL_FAILED
631 
632 /* The following were added earlier */
633 
634 #define CURLE_OPERATION_TIMEOUTED CURLE_OPERATION_TIMEDOUT
635 
636 #define CURLE_HTTP_NOT_FOUND CURLE_HTTP_RETURNED_ERROR
637 #define CURLE_HTTP_PORT_FAILED CURLE_INTERFACE_FAILED
638 #define CURLE_FTP_COULDNT_STOR_FILE CURLE_UPLOAD_FAILED
639 
640 #define CURLE_FTP_PARTIAL_FILE CURLE_PARTIAL_FILE
641 #define CURLE_FTP_BAD_DOWNLOAD_RESUME CURLE_BAD_DOWNLOAD_RESUME
642 
643 /* This was the error code 50 in 7.7.3 and a few earlier versions, this
644    is no longer used by libcurl but is instead #defined here only to not
645    make programs break */
646 #define CURLE_ALREADY_COMPLETE 99999
647 
648 /* Provide defines for really old option names */
649 #define CURLOPT_FILE CURLOPT_WRITEDATA /* name changed in 7.9.7 */
650 #define CURLOPT_INFILE CURLOPT_READDATA /* name changed in 7.9.7 */
651 #define CURLOPT_WRITEHEADER CURLOPT_HEADERDATA
652 
653 /* Since long deprecated options with no code in the lib that does anything
654    with them. */
655 #define CURLOPT_WRITEINFO CURLOPT_OBSOLETE40
656 #define CURLOPT_CLOSEPOLICY CURLOPT_OBSOLETE72
657 
658 #endif /*!CURL_NO_OLDIES*/
659 
660 /* This prototype applies to all conversion callbacks */
661 typedef CURLcode (*curl_conv_callback)(char *buffer, size_t length);
662 
663 typedef CURLcode (*curl_ssl_ctx_callback)(CURL *curl,    /* easy handle */
664                                           void *ssl_ctx, /* actually an
665                                                             OpenSSL SSL_CTX */
666                                           void *userptr);
667 
668 typedef enum {
669   CURLPROXY_HTTP = 0,   /* added in 7.10, new in 7.19.4 default is to use
670                            CONNECT HTTP/1.1 */
671   CURLPROXY_HTTP_1_0 = 1,   /* added in 7.19.4, force to use CONNECT
672                                HTTP/1.0  */
673   CURLPROXY_HTTPS = 2, /* added in 7.52.0 */
674   CURLPROXY_SOCKS4 = 4, /* support added in 7.15.2, enum existed already
675                            in 7.10 */
676   CURLPROXY_SOCKS5 = 5, /* added in 7.10 */
677   CURLPROXY_SOCKS4A = 6, /* added in 7.18.0 */
678   CURLPROXY_SOCKS5_HOSTNAME = 7 /* Use the SOCKS5 protocol but pass along the
679                                    host name rather than the IP address. added
680                                    in 7.18.0 */
681 } curl_proxytype;  /* this enum was added in 7.10 */
682 
683 /*
684  * Bitmasks for CURLOPT_HTTPAUTH and CURLOPT_PROXYAUTH options:
685  *
686  * CURLAUTH_NONE         - No HTTP authentication
687  * CURLAUTH_BASIC        - HTTP Basic authentication (default)
688  * CURLAUTH_DIGEST       - HTTP Digest authentication
689  * CURLAUTH_NEGOTIATE    - HTTP Negotiate (SPNEGO) authentication
690  * CURLAUTH_GSSNEGOTIATE - Alias for CURLAUTH_NEGOTIATE (deprecated)
691  * CURLAUTH_NTLM         - HTTP NTLM authentication
692  * CURLAUTH_DIGEST_IE    - HTTP Digest authentication with IE flavour
693  * CURLAUTH_NTLM_WB      - HTTP NTLM authentication delegated to winbind helper
694  * CURLAUTH_ONLY         - Use together with a single other type to force no
695  *                         authentication or just that single type
696  * CURLAUTH_ANY          - All fine types set
697  * CURLAUTH_ANYSAFE      - All fine types except Basic
698  */
699 
700 #define CURLAUTH_NONE         ((unsigned long)0)
701 #define CURLAUTH_BASIC        (((unsigned long)1)<<0)
702 #define CURLAUTH_DIGEST       (((unsigned long)1)<<1)
703 #define CURLAUTH_NEGOTIATE    (((unsigned long)1)<<2)
704 /* Deprecated since the advent of CURLAUTH_NEGOTIATE */
705 #define CURLAUTH_GSSNEGOTIATE CURLAUTH_NEGOTIATE
706 /* Used for CURLOPT_SOCKS5_AUTH to stay terminologically correct */
707 #define CURLAUTH_GSSAPI CURLAUTH_NEGOTIATE
708 #define CURLAUTH_NTLM         (((unsigned long)1)<<3)
709 #define CURLAUTH_DIGEST_IE    (((unsigned long)1)<<4)
710 #define CURLAUTH_NTLM_WB      (((unsigned long)1)<<5)
711 #define CURLAUTH_ONLY         (((unsigned long)1)<<31)
712 #define CURLAUTH_ANY          (~CURLAUTH_DIGEST_IE)
713 #define CURLAUTH_ANYSAFE      (~(CURLAUTH_BASIC|CURLAUTH_DIGEST_IE))
714 
715 #define CURLSSH_AUTH_ANY       ~0     /* all types supported by the server */
716 #define CURLSSH_AUTH_NONE      0      /* none allowed, silly but complete */
717 #define CURLSSH_AUTH_PUBLICKEY (1<<0) /* public/private key files */
718 #define CURLSSH_AUTH_PASSWORD  (1<<1) /* password */
719 #define CURLSSH_AUTH_HOST      (1<<2) /* host key files */
720 #define CURLSSH_AUTH_KEYBOARD  (1<<3) /* keyboard interactive */
721 #define CURLSSH_AUTH_AGENT     (1<<4) /* agent (ssh-agent, pageant...) */
722 #define CURLSSH_AUTH_GSSAPI    (1<<5) /* gssapi (kerberos, ...) */
723 #define CURLSSH_AUTH_DEFAULT CURLSSH_AUTH_ANY
724 
725 #define CURLGSSAPI_DELEGATION_NONE        0      /* no delegation (default) */
726 #define CURLGSSAPI_DELEGATION_POLICY_FLAG (1<<0) /* if permitted by policy */
727 #define CURLGSSAPI_DELEGATION_FLAG        (1<<1) /* delegate always */
728 
729 #define CURL_ERROR_SIZE 256
730 
731 enum curl_khtype {
732   CURLKHTYPE_UNKNOWN,
733   CURLKHTYPE_RSA1,
734   CURLKHTYPE_RSA,
735   CURLKHTYPE_DSS,
736   CURLKHTYPE_ECDSA,
737   CURLKHTYPE_ED25519
738 };
739 
740 struct curl_khkey {
741   const char *key; /* points to a zero-terminated string encoded with base64
742                       if len is zero, otherwise to the "raw" data */
743   size_t len;
744   enum curl_khtype keytype;
745 };
746 
747 /* this is the set of return values expected from the curl_sshkeycallback
748    callback */
749 enum curl_khstat {
750   CURLKHSTAT_FINE_ADD_TO_FILE,
751   CURLKHSTAT_FINE,
752   CURLKHSTAT_REJECT, /* reject the connection, return an error */
753   CURLKHSTAT_DEFER,  /* do not accept it, but we can't answer right now so
754                         this causes a CURLE_DEFER error but otherwise the
755                         connection will be left intact etc */
756   CURLKHSTAT_LAST    /* not for use, only a marker for last-in-list */
757 };
758 
759 /* this is the set of status codes pass in to the callback */
760 enum curl_khmatch {
761   CURLKHMATCH_OK,       /* match */
762   CURLKHMATCH_MISMATCH, /* host found, key mismatch! */
763   CURLKHMATCH_MISSING,  /* no matching host/key found */
764   CURLKHMATCH_LAST      /* not for use, only a marker for last-in-list */
765 };
766 
767 typedef int
768   (*curl_sshkeycallback) (CURL *easy,     /* easy handle */
769                           const struct curl_khkey *knownkey, /* known */
770                           const struct curl_khkey *foundkey, /* found */
771                           enum curl_khmatch, /* libcurl's view on the keys */
772                           void *clientp); /* custom pointer passed from app */
773 
774 /* parameter for the CURLOPT_USE_SSL option */
775 typedef enum {
776   CURLUSESSL_NONE,    /* do not attempt to use SSL */
777   CURLUSESSL_TRY,     /* try using SSL, proceed anyway otherwise */
778   CURLUSESSL_CONTROL, /* SSL for the control connection or fail */
779   CURLUSESSL_ALL,     /* SSL for all communication or fail */
780   CURLUSESSL_LAST     /* not an option, never use */
781 } curl_usessl;
782 
783 /* Definition of bits for the CURLOPT_SSL_OPTIONS argument: */
784 
785 /* - ALLOW_BEAST tells libcurl to allow the BEAST SSL vulnerability in the
786    name of improving interoperability with older servers. Some SSL libraries
787    have introduced work-arounds for this flaw but those work-arounds sometimes
788    make the SSL communication fail. To regain functionality with those broken
789    servers, a user can this way allow the vulnerability back. */
790 #define CURLSSLOPT_ALLOW_BEAST (1<<0)
791 
792 /* - NO_REVOKE tells libcurl to disable certificate revocation checks for those
793    SSL backends where such behavior is present. */
794 #define CURLSSLOPT_NO_REVOKE (1<<1)
795 
796 /* The default connection attempt delay in milliseconds for happy eyeballs.
797    CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS.3 and happy-eyeballs-timeout-ms.d document
798    this value, keep them in sync. */
799 #define CURL_HET_DEFAULT 200L
800 
801 #ifndef CURL_NO_OLDIES /* define this to test if your app builds with all
802                           the obsolete stuff removed! */
803 
804 /* Backwards compatibility with older names */
805 /* These are scheduled to disappear by 2009 */
806 
807 #define CURLFTPSSL_NONE CURLUSESSL_NONE
808 #define CURLFTPSSL_TRY CURLUSESSL_TRY
809 #define CURLFTPSSL_CONTROL CURLUSESSL_CONTROL
810 #define CURLFTPSSL_ALL CURLUSESSL_ALL
811 #define CURLFTPSSL_LAST CURLUSESSL_LAST
812 #define curl_ftpssl curl_usessl
813 #endif /*!CURL_NO_OLDIES*/
814 
815 /* parameter for the CURLOPT_FTP_SSL_CCC option */
816 typedef enum {
817   CURLFTPSSL_CCC_NONE,    /* do not send CCC */
818   CURLFTPSSL_CCC_PASSIVE, /* Let the server initiate the shutdown */
819   CURLFTPSSL_CCC_ACTIVE,  /* Initiate the shutdown */
820   CURLFTPSSL_CCC_LAST     /* not an option, never use */
821 } curl_ftpccc;
822 
823 /* parameter for the CURLOPT_FTPSSLAUTH option */
824 typedef enum {
825   CURLFTPAUTH_DEFAULT, /* let libcurl decide */
826   CURLFTPAUTH_SSL,     /* use "AUTH SSL" */
827   CURLFTPAUTH_TLS,     /* use "AUTH TLS" */
828   CURLFTPAUTH_LAST /* not an option, never use */
829 } curl_ftpauth;
830 
831 /* parameter for the CURLOPT_FTP_CREATE_MISSING_DIRS option */
832 typedef enum {
833   CURLFTP_CREATE_DIR_NONE,  /* do NOT create missing dirs! */
834   CURLFTP_CREATE_DIR,       /* (FTP/SFTP) if CWD fails, try MKD and then CWD
835                                again if MKD succeeded, for SFTP this does
836                                similar magic */
837   CURLFTP_CREATE_DIR_RETRY, /* (FTP only) if CWD fails, try MKD and then CWD
838                                again even if MKD failed! */
839   CURLFTP_CREATE_DIR_LAST   /* not an option, never use */
840 } curl_ftpcreatedir;
841 
842 /* parameter for the CURLOPT_FTP_FILEMETHOD option */
843 typedef enum {
844   CURLFTPMETHOD_DEFAULT,   /* let libcurl pick */
845   CURLFTPMETHOD_MULTICWD,  /* single CWD operation for each path part */
846   CURLFTPMETHOD_NOCWD,     /* no CWD at all */
847   CURLFTPMETHOD_SINGLECWD, /* one CWD to full dir, then work on file */
848   CURLFTPMETHOD_LAST       /* not an option, never use */
849 } curl_ftpmethod;
850 
851 /* bitmask defines for CURLOPT_HEADEROPT */
852 #define CURLHEADER_UNIFIED  0
853 #define CURLHEADER_SEPARATE (1<<0)
854 
855 /* CURLPROTO_ defines are for the CURLOPT_*PROTOCOLS options */
856 #define CURLPROTO_HTTP   (1<<0)
857 #define CURLPROTO_HTTPS  (1<<1)
858 #define CURLPROTO_FTP    (1<<2)
859 #define CURLPROTO_FTPS   (1<<3)
860 #define CURLPROTO_SCP    (1<<4)
861 #define CURLPROTO_SFTP   (1<<5)
862 #define CURLPROTO_TELNET (1<<6)
863 #define CURLPROTO_LDAP   (1<<7)
864 #define CURLPROTO_LDAPS  (1<<8)
865 #define CURLPROTO_DICT   (1<<9)
866 #define CURLPROTO_FILE   (1<<10)
867 #define CURLPROTO_TFTP   (1<<11)
868 #define CURLPROTO_IMAP   (1<<12)
869 #define CURLPROTO_IMAPS  (1<<13)
870 #define CURLPROTO_POP3   (1<<14)
871 #define CURLPROTO_POP3S  (1<<15)
872 #define CURLPROTO_SMTP   (1<<16)
873 #define CURLPROTO_SMTPS  (1<<17)
874 #define CURLPROTO_RTSP   (1<<18)
875 #define CURLPROTO_RTMP   (1<<19)
876 #define CURLPROTO_RTMPT  (1<<20)
877 #define CURLPROTO_RTMPE  (1<<21)
878 #define CURLPROTO_RTMPTE (1<<22)
879 #define CURLPROTO_RTMPS  (1<<23)
880 #define CURLPROTO_RTMPTS (1<<24)
881 #define CURLPROTO_GOPHER (1<<25)
882 #define CURLPROTO_SMB    (1<<26)
883 #define CURLPROTO_SMBS   (1<<27)
884 #define CURLPROTO_ALL    (~0) /* enable everything */
885 
886 /* long may be 32 or 64 bits, but we should never depend on anything else
887    but 32 */
888 #define CURLOPTTYPE_LONG          0
889 #define CURLOPTTYPE_OBJECTPOINT   10000
890 #define CURLOPTTYPE_STRINGPOINT   10000
891 #define CURLOPTTYPE_FUNCTIONPOINT 20000
892 #define CURLOPTTYPE_OFF_T         30000
893 
894 /* *STRINGPOINT is an alias for OBJECTPOINT to allow tools to extract the
895    string options from the header file */
896 
897 /* name is uppercase CURLOPT_<name>,
898    type is one of the defined CURLOPTTYPE_<type>
899    number is unique identifier */
900 #ifdef CINIT
901 #undef CINIT
902 #endif
903 
904 #ifdef CURL_ISOCPP
905 #define CINIT(na,t,nu) CURLOPT_ ## na = CURLOPTTYPE_ ## t + nu
906 #else
907 /* The macro "##" is ISO C, we assume pre-ISO C doesn't support it. */
908 #define LONG          CURLOPTTYPE_LONG
909 #define OBJECTPOINT   CURLOPTTYPE_OBJECTPOINT
910 #define STRINGPOINT   CURLOPTTYPE_OBJECTPOINT
911 #define FUNCTIONPOINT CURLOPTTYPE_FUNCTIONPOINT
912 #define OFF_T         CURLOPTTYPE_OFF_T
913 #define CINIT(name,type,number) CURLOPT_/**/name = type + number
914 #endif
915 
916 /*
917  * This macro-mania below setups the CURLOPT_[what] enum, to be used with
918  * curl_easy_setopt(). The first argument in the CINIT() macro is the [what]
919  * word.
920  */
921 
922 typedef enum {
923   /* This is the FILE * or void * the regular output should be written to. */
924   CINIT(WRITEDATA, OBJECTPOINT, 1),
925 
926   /* The full URL to get/put */
927   CINIT(URL, STRINGPOINT, 2),
928 
929   /* Port number to connect to, if other than default. */
930   CINIT(PORT, LONG, 3),
931 
932   /* Name of proxy to use. */
933   CINIT(PROXY, STRINGPOINT, 4),
934 
935   /* "user:password;options" to use when fetching. */
936   CINIT(USERPWD, STRINGPOINT, 5),
937 
938   /* "user:password" to use with proxy. */
939   CINIT(PROXYUSERPWD, STRINGPOINT, 6),
940 
941   /* Range to get, specified as an ASCII string. */
942   CINIT(RANGE, STRINGPOINT, 7),
943 
944   /* not used */
945 
946   /* Specified file stream to upload from (use as input): */
947   CINIT(READDATA, OBJECTPOINT, 9),
948 
949   /* Buffer to receive error messages in, must be at least CURL_ERROR_SIZE
950    * bytes big. */
951   CINIT(ERRORBUFFER, OBJECTPOINT, 10),
952 
953   /* Function that will be called to store the output (instead of fwrite). The
954    * parameters will use fwrite() syntax, make sure to follow them. */
955   CINIT(WRITEFUNCTION, FUNCTIONPOINT, 11),
956 
957   /* Function that will be called to read the input (instead of fread). The
958    * parameters will use fread() syntax, make sure to follow them. */
959   CINIT(READFUNCTION, FUNCTIONPOINT, 12),
960 
961   /* Time-out the read operation after this amount of seconds */
962   CINIT(TIMEOUT, LONG, 13),
963 
964   /* If the CURLOPT_INFILE is used, this can be used to inform libcurl about
965    * how large the file being sent really is. That allows better error
966    * checking and better verifies that the upload was successful. -1 means
967    * unknown size.
968    *
969    * For large file support, there is also a _LARGE version of the key
970    * which takes an off_t type, allowing platforms with larger off_t
971    * sizes to handle larger files.  See below for INFILESIZE_LARGE.
972    */
973   CINIT(INFILESIZE, LONG, 14),
974 
975   /* POST static input fields. */
976   CINIT(POSTFIELDS, OBJECTPOINT, 15),
977 
978   /* Set the referrer page (needed by some CGIs) */
979   CINIT(REFERER, STRINGPOINT, 16),
980 
981   /* Set the FTP PORT string (interface name, named or numerical IP address)
982      Use i.e '-' to use default address. */
983   CINIT(FTPPORT, STRINGPOINT, 17),
984 
985   /* Set the User-Agent string (examined by some CGIs) */
986   CINIT(USERAGENT, STRINGPOINT, 18),
987 
988   /* If the download receives less than "low speed limit" bytes/second
989    * during "low speed time" seconds, the operations is aborted.
990    * You could i.e if you have a pretty high speed connection, abort if
991    * it is less than 2000 bytes/sec during 20 seconds.
992    */
993 
994   /* Set the "low speed limit" */
995   CINIT(LOW_SPEED_LIMIT, LONG, 19),
996 
997   /* Set the "low speed time" */
998   CINIT(LOW_SPEED_TIME, LONG, 20),
999 
1000   /* Set the continuation offset.
1001    *
1002    * Note there is also a _LARGE version of this key which uses
1003    * off_t types, allowing for large file offsets on platforms which
1004    * use larger-than-32-bit off_t's.  Look below for RESUME_FROM_LARGE.
1005    */
1006   CINIT(RESUME_FROM, LONG, 21),
1007 
1008   /* Set cookie in request: */
1009   CINIT(COOKIE, STRINGPOINT, 22),
1010 
1011   /* This points to a linked list of headers, struct curl_slist kind. This
1012      list is also used for RTSP (in spite of its name) */
1013   CINIT(HTTPHEADER, OBJECTPOINT, 23),
1014 
1015   /* This points to a linked list of post entries, struct curl_httppost */
1016   CINIT(HTTPPOST, OBJECTPOINT, 24),
1017 
1018   /* name of the file keeping your private SSL-certificate */
1019   CINIT(SSLCERT, STRINGPOINT, 25),
1020 
1021   /* password for the SSL or SSH private key */
1022   CINIT(KEYPASSWD, STRINGPOINT, 26),
1023 
1024   /* send TYPE parameter? */
1025   CINIT(CRLF, LONG, 27),
1026 
1027   /* send linked-list of QUOTE commands */
1028   CINIT(QUOTE, OBJECTPOINT, 28),
1029 
1030   /* send FILE * or void * to store headers to, if you use a callback it
1031      is simply passed to the callback unmodified */
1032   CINIT(HEADERDATA, OBJECTPOINT, 29),
1033 
1034   /* point to a file to read the initial cookies from, also enables
1035      "cookie awareness" */
1036   CINIT(COOKIEFILE, STRINGPOINT, 31),
1037 
1038   /* What version to specifically try to use.
1039      See CURL_SSLVERSION defines below. */
1040   CINIT(SSLVERSION, LONG, 32),
1041 
1042   /* What kind of HTTP time condition to use, see defines */
1043   CINIT(TIMECONDITION, LONG, 33),
1044 
1045   /* Time to use with the above condition. Specified in number of seconds
1046      since 1 Jan 1970 */
1047   CINIT(TIMEVALUE, LONG, 34),
1048 
1049   /* 35 = OBSOLETE */
1050 
1051   /* Custom request, for customizing the get command like
1052      HTTP: DELETE, TRACE and others
1053      FTP: to use a different list command
1054      */
1055   CINIT(CUSTOMREQUEST, STRINGPOINT, 36),
1056 
1057   /* FILE handle to use instead of stderr */
1058   CINIT(STDERR, OBJECTPOINT, 37),
1059 
1060   /* 38 is not used */
1061 
1062   /* send linked-list of post-transfer QUOTE commands */
1063   CINIT(POSTQUOTE, OBJECTPOINT, 39),
1064 
1065   CINIT(OBSOLETE40, OBJECTPOINT, 40), /* OBSOLETE, do not use! */
1066 
1067   CINIT(VERBOSE, LONG, 41),      /* talk a lot */
1068   CINIT(HEADER, LONG, 42),       /* throw the header out too */
1069   CINIT(NOPROGRESS, LONG, 43),   /* shut off the progress meter */
1070   CINIT(NOBODY, LONG, 44),       /* use HEAD to get http document */
1071   CINIT(FAILONERROR, LONG, 45),  /* no output on http error codes >= 400 */
1072   CINIT(UPLOAD, LONG, 46),       /* this is an upload */
1073   CINIT(POST, LONG, 47),         /* HTTP POST method */
1074   CINIT(DIRLISTONLY, LONG, 48),  /* bare names when listing directories */
1075 
1076   CINIT(APPEND, LONG, 50),       /* Append instead of overwrite on upload! */
1077 
1078   /* Specify whether to read the user+password from the .netrc or the URL.
1079    * This must be one of the CURL_NETRC_* enums below. */
1080   CINIT(NETRC, LONG, 51),
1081 
1082   CINIT(FOLLOWLOCATION, LONG, 52),  /* use Location: Luke! */
1083 
1084   CINIT(TRANSFERTEXT, LONG, 53), /* transfer data in text/ASCII format */
1085   CINIT(PUT, LONG, 54),          /* HTTP PUT */
1086 
1087   /* 55 = OBSOLETE */
1088 
1089   /* DEPRECATED
1090    * Function that will be called instead of the internal progress display
1091    * function. This function should be defined as the curl_progress_callback
1092    * prototype defines. */
1093   CINIT(PROGRESSFUNCTION, FUNCTIONPOINT, 56),
1094 
1095   /* Data passed to the CURLOPT_PROGRESSFUNCTION and CURLOPT_XFERINFOFUNCTION
1096      callbacks */
1097   CINIT(PROGRESSDATA, OBJECTPOINT, 57),
1098 #define CURLOPT_XFERINFODATA CURLOPT_PROGRESSDATA
1099 
1100   /* We want the referrer field set automatically when following locations */
1101   CINIT(AUTOREFERER, LONG, 58),
1102 
1103   /* Port of the proxy, can be set in the proxy string as well with:
1104      "[host]:[port]" */
1105   CINIT(PROXYPORT, LONG, 59),
1106 
1107   /* size of the POST input data, if strlen() is not good to use */
1108   CINIT(POSTFIELDSIZE, LONG, 60),
1109 
1110   /* tunnel non-http operations through a HTTP proxy */
1111   CINIT(HTTPPROXYTUNNEL, LONG, 61),
1112 
1113   /* Set the interface string to use as outgoing network interface */
1114   CINIT(INTERFACE, STRINGPOINT, 62),
1115 
1116   /* Set the krb4/5 security level, this also enables krb4/5 awareness.  This
1117    * is a string, 'clear', 'safe', 'confidential' or 'private'.  If the string
1118    * is set but doesn't match one of these, 'private' will be used.  */
1119   CINIT(KRBLEVEL, STRINGPOINT, 63),
1120 
1121   /* Set if we should verify the peer in ssl handshake, set 1 to verify. */
1122   CINIT(SSL_VERIFYPEER, LONG, 64),
1123 
1124   /* The CApath or CAfile used to validate the peer certificate
1125      this option is used only if SSL_VERIFYPEER is true */
1126   CINIT(CAINFO, STRINGPOINT, 65),
1127 
1128   /* 66 = OBSOLETE */
1129   /* 67 = OBSOLETE */
1130 
1131   /* Maximum number of http redirects to follow */
1132   CINIT(MAXREDIRS, LONG, 68),
1133 
1134   /* Pass a long set to 1 to get the date of the requested document (if
1135      possible)! Pass a zero to shut it off. */
1136   CINIT(FILETIME, LONG, 69),
1137 
1138   /* This points to a linked list of telnet options */
1139   CINIT(TELNETOPTIONS, OBJECTPOINT, 70),
1140 
1141   /* Max amount of cached alive connections */
1142   CINIT(MAXCONNECTS, LONG, 71),
1143 
1144   CINIT(OBSOLETE72, LONG, 72), /* OBSOLETE, do not use! */
1145 
1146   /* 73 = OBSOLETE */
1147 
1148   /* Set to explicitly use a new connection for the upcoming transfer.
1149      Do not use this unless you're absolutely sure of this, as it makes the
1150      operation slower and is less friendly for the network. */
1151   CINIT(FRESH_CONNECT, LONG, 74),
1152 
1153   /* Set to explicitly forbid the upcoming transfer's connection to be re-used
1154      when done. Do not use this unless you're absolutely sure of this, as it
1155      makes the operation slower and is less friendly for the network. */
1156   CINIT(FORBID_REUSE, LONG, 75),
1157 
1158   /* Set to a file name that contains random data for libcurl to use to
1159      seed the random engine when doing SSL connects. */
1160   CINIT(RANDOM_FILE, STRINGPOINT, 76),
1161 
1162   /* Set to the Entropy Gathering Daemon socket pathname */
1163   CINIT(EGDSOCKET, STRINGPOINT, 77),
1164 
1165   /* Time-out connect operations after this amount of seconds, if connects are
1166      OK within this time, then fine... This only aborts the connect phase. */
1167   CINIT(CONNECTTIMEOUT, LONG, 78),
1168 
1169   /* Function that will be called to store headers (instead of fwrite). The
1170    * parameters will use fwrite() syntax, make sure to follow them. */
1171   CINIT(HEADERFUNCTION, FUNCTIONPOINT, 79),
1172 
1173   /* Set this to force the HTTP request to get back to GET. Only really usable
1174      if POST, PUT or a custom request have been used first.
1175    */
1176   CINIT(HTTPGET, LONG, 80),
1177 
1178   /* Set if we should verify the Common name from the peer certificate in ssl
1179    * handshake, set 1 to check existence, 2 to ensure that it matches the
1180    * provided hostname. */
1181   CINIT(SSL_VERIFYHOST, LONG, 81),
1182 
1183   /* Specify which file name to write all known cookies in after completed
1184      operation. Set file name to "-" (dash) to make it go to stdout. */
1185   CINIT(COOKIEJAR, STRINGPOINT, 82),
1186 
1187   /* Specify which SSL ciphers to use */
1188   CINIT(SSL_CIPHER_LIST, STRINGPOINT, 83),
1189 
1190   /* Specify which HTTP version to use! This must be set to one of the
1191      CURL_HTTP_VERSION* enums set below. */
1192   CINIT(HTTP_VERSION, LONG, 84),
1193 
1194   /* Specifically switch on or off the FTP engine's use of the EPSV command. By
1195      default, that one will always be attempted before the more traditional
1196      PASV command. */
1197   CINIT(FTP_USE_EPSV, LONG, 85),
1198 
1199   /* type of the file keeping your SSL-certificate ("DER", "PEM", "ENG") */
1200   CINIT(SSLCERTTYPE, STRINGPOINT, 86),
1201 
1202   /* name of the file keeping your private SSL-key */
1203   CINIT(SSLKEY, STRINGPOINT, 87),
1204 
1205   /* type of the file keeping your private SSL-key ("DER", "PEM", "ENG") */
1206   CINIT(SSLKEYTYPE, STRINGPOINT, 88),
1207 
1208   /* crypto engine for the SSL-sub system */
1209   CINIT(SSLENGINE, STRINGPOINT, 89),
1210 
1211   /* set the crypto engine for the SSL-sub system as default
1212      the param has no meaning...
1213    */
1214   CINIT(SSLENGINE_DEFAULT, LONG, 90),
1215 
1216   /* Non-zero value means to use the global dns cache */
1217   CINIT(DNS_USE_GLOBAL_CACHE, LONG, 91), /* DEPRECATED, do not use! */
1218 
1219   /* DNS cache timeout */
1220   CINIT(DNS_CACHE_TIMEOUT, LONG, 92),
1221 
1222   /* send linked-list of pre-transfer QUOTE commands */
1223   CINIT(PREQUOTE, OBJECTPOINT, 93),
1224 
1225   /* set the debug function */
1226   CINIT(DEBUGFUNCTION, FUNCTIONPOINT, 94),
1227 
1228   /* set the data for the debug function */
1229   CINIT(DEBUGDATA, OBJECTPOINT, 95),
1230 
1231   /* mark this as start of a cookie session */
1232   CINIT(COOKIESESSION, LONG, 96),
1233 
1234   /* The CApath directory used to validate the peer certificate
1235      this option is used only if SSL_VERIFYPEER is true */
1236   CINIT(CAPATH, STRINGPOINT, 97),
1237 
1238   /* Instruct libcurl to use a smaller receive buffer */
1239   CINIT(BUFFERSIZE, LONG, 98),
1240 
1241   /* Instruct libcurl to not use any signal/alarm handlers, even when using
1242      timeouts. This option is useful for multi-threaded applications.
1243      See libcurl-the-guide for more background information. */
1244   CINIT(NOSIGNAL, LONG, 99),
1245 
1246   /* Provide a CURLShare for mutexing non-ts data */
1247   CINIT(SHARE, OBJECTPOINT, 100),
1248 
1249   /* indicates type of proxy. accepted values are CURLPROXY_HTTP (default),
1250      CURLPROXY_HTTPS, CURLPROXY_SOCKS4, CURLPROXY_SOCKS4A and
1251      CURLPROXY_SOCKS5. */
1252   CINIT(PROXYTYPE, LONG, 101),
1253 
1254   /* Set the Accept-Encoding string. Use this to tell a server you would like
1255      the response to be compressed. Before 7.21.6, this was known as
1256      CURLOPT_ENCODING */
1257   CINIT(ACCEPT_ENCODING, STRINGPOINT, 102),
1258 
1259   /* Set pointer to private data */
1260   CINIT(PRIVATE, OBJECTPOINT, 103),
1261 
1262   /* Set aliases for HTTP 200 in the HTTP Response header */
1263   CINIT(HTTP200ALIASES, OBJECTPOINT, 104),
1264 
1265   /* Continue to send authentication (user+password) when following locations,
1266      even when hostname changed. This can potentially send off the name
1267      and password to whatever host the server decides. */
1268   CINIT(UNRESTRICTED_AUTH, LONG, 105),
1269 
1270   /* Specifically switch on or off the FTP engine's use of the EPRT command (
1271      it also disables the LPRT attempt). By default, those ones will always be
1272      attempted before the good old traditional PORT command. */
1273   CINIT(FTP_USE_EPRT, LONG, 106),
1274 
1275   /* Set this to a bitmask value to enable the particular authentications
1276      methods you like. Use this in combination with CURLOPT_USERPWD.
1277      Note that setting multiple bits may cause extra network round-trips. */
1278   CINIT(HTTPAUTH, LONG, 107),
1279 
1280   /* Set the ssl context callback function, currently only for OpenSSL ssl_ctx
1281      in second argument. The function must be matching the
1282      curl_ssl_ctx_callback proto. */
1283   CINIT(SSL_CTX_FUNCTION, FUNCTIONPOINT, 108),
1284 
1285   /* Set the userdata for the ssl context callback function's third
1286      argument */
1287   CINIT(SSL_CTX_DATA, OBJECTPOINT, 109),
1288 
1289   /* FTP Option that causes missing dirs to be created on the remote server.
1290      In 7.19.4 we introduced the convenience enums for this option using the
1291      CURLFTP_CREATE_DIR prefix.
1292   */
1293   CINIT(FTP_CREATE_MISSING_DIRS, LONG, 110),
1294 
1295   /* Set this to a bitmask value to enable the particular authentications
1296      methods you like. Use this in combination with CURLOPT_PROXYUSERPWD.
1297      Note that setting multiple bits may cause extra network round-trips. */
1298   CINIT(PROXYAUTH, LONG, 111),
1299 
1300   /* FTP option that changes the timeout, in seconds, associated with
1301      getting a response.  This is different from transfer timeout time and
1302      essentially places a demand on the FTP server to acknowledge commands
1303      in a timely manner. */
1304   CINIT(FTP_RESPONSE_TIMEOUT, LONG, 112),
1305 #define CURLOPT_SERVER_RESPONSE_TIMEOUT CURLOPT_FTP_RESPONSE_TIMEOUT
1306 
1307   /* Set this option to one of the CURL_IPRESOLVE_* defines (see below) to
1308      tell libcurl to resolve names to those IP versions only. This only has
1309      affect on systems with support for more than one, i.e IPv4 _and_ IPv6. */
1310   CINIT(IPRESOLVE, LONG, 113),
1311 
1312   /* Set this option to limit the size of a file that will be downloaded from
1313      an HTTP or FTP server.
1314 
1315      Note there is also _LARGE version which adds large file support for
1316      platforms which have larger off_t sizes.  See MAXFILESIZE_LARGE below. */
1317   CINIT(MAXFILESIZE, LONG, 114),
1318 
1319   /* See the comment for INFILESIZE above, but in short, specifies
1320    * the size of the file being uploaded.  -1 means unknown.
1321    */
1322   CINIT(INFILESIZE_LARGE, OFF_T, 115),
1323 
1324   /* Sets the continuation offset.  There is also a LONG version of this;
1325    * look above for RESUME_FROM.
1326    */
1327   CINIT(RESUME_FROM_LARGE, OFF_T, 116),
1328 
1329   /* Sets the maximum size of data that will be downloaded from
1330    * an HTTP or FTP server.  See MAXFILESIZE above for the LONG version.
1331    */
1332   CINIT(MAXFILESIZE_LARGE, OFF_T, 117),
1333 
1334   /* Set this option to the file name of your .netrc file you want libcurl
1335      to parse (using the CURLOPT_NETRC option). If not set, libcurl will do
1336      a poor attempt to find the user's home directory and check for a .netrc
1337      file in there. */
1338   CINIT(NETRC_FILE, STRINGPOINT, 118),
1339 
1340   /* Enable SSL/TLS for FTP, pick one of:
1341      CURLUSESSL_TRY     - try using SSL, proceed anyway otherwise
1342      CURLUSESSL_CONTROL - SSL for the control connection or fail
1343      CURLUSESSL_ALL     - SSL for all communication or fail
1344   */
1345   CINIT(USE_SSL, LONG, 119),
1346 
1347   /* The _LARGE version of the standard POSTFIELDSIZE option */
1348   CINIT(POSTFIELDSIZE_LARGE, OFF_T, 120),
1349 
1350   /* Enable/disable the TCP Nagle algorithm */
1351   CINIT(TCP_NODELAY, LONG, 121),
1352 
1353   /* 122 OBSOLETE, used in 7.12.3. Gone in 7.13.0 */
1354   /* 123 OBSOLETE. Gone in 7.16.0 */
1355   /* 124 OBSOLETE, used in 7.12.3. Gone in 7.13.0 */
1356   /* 125 OBSOLETE, used in 7.12.3. Gone in 7.13.0 */
1357   /* 126 OBSOLETE, used in 7.12.3. Gone in 7.13.0 */
1358   /* 127 OBSOLETE. Gone in 7.16.0 */
1359   /* 128 OBSOLETE. Gone in 7.16.0 */
1360 
1361   /* When FTP over SSL/TLS is selected (with CURLOPT_USE_SSL), this option
1362      can be used to change libcurl's default action which is to first try
1363      "AUTH SSL" and then "AUTH TLS" in this order, and proceed when a OK
1364      response has been received.
1365 
1366      Available parameters are:
1367      CURLFTPAUTH_DEFAULT - let libcurl decide
1368      CURLFTPAUTH_SSL     - try "AUTH SSL" first, then TLS
1369      CURLFTPAUTH_TLS     - try "AUTH TLS" first, then SSL
1370   */
1371   CINIT(FTPSSLAUTH, LONG, 129),
1372 
1373   CINIT(IOCTLFUNCTION, FUNCTIONPOINT, 130),
1374   CINIT(IOCTLDATA, OBJECTPOINT, 131),
1375 
1376   /* 132 OBSOLETE. Gone in 7.16.0 */
1377   /* 133 OBSOLETE. Gone in 7.16.0 */
1378 
1379   /* zero terminated string for pass on to the FTP server when asked for
1380      "account" info */
1381   CINIT(FTP_ACCOUNT, STRINGPOINT, 134),
1382 
1383   /* feed cookie into cookie engine */
1384   CINIT(COOKIELIST, STRINGPOINT, 135),
1385 
1386   /* ignore Content-Length */
1387   CINIT(IGNORE_CONTENT_LENGTH, LONG, 136),
1388 
1389   /* Set to non-zero to skip the IP address received in a 227 PASV FTP server
1390      response. Typically used for FTP-SSL purposes but is not restricted to
1391      that. libcurl will then instead use the same IP address it used for the
1392      control connection. */
1393   CINIT(FTP_SKIP_PASV_IP, LONG, 137),
1394 
1395   /* Select "file method" to use when doing FTP, see the curl_ftpmethod
1396      above. */
1397   CINIT(FTP_FILEMETHOD, LONG, 138),
1398 
1399   /* Local port number to bind the socket to */
1400   CINIT(LOCALPORT, LONG, 139),
1401 
1402   /* Number of ports to try, including the first one set with LOCALPORT.
1403      Thus, setting it to 1 will make no additional attempts but the first.
1404   */
1405   CINIT(LOCALPORTRANGE, LONG, 140),
1406 
1407   /* no transfer, set up connection and let application use the socket by
1408      extracting it with CURLINFO_LASTSOCKET */
1409   CINIT(CONNECT_ONLY, LONG, 141),
1410 
1411   /* Function that will be called to convert from the
1412      network encoding (instead of using the iconv calls in libcurl) */
1413   CINIT(CONV_FROM_NETWORK_FUNCTION, FUNCTIONPOINT, 142),
1414 
1415   /* Function that will be called to convert to the
1416      network encoding (instead of using the iconv calls in libcurl) */
1417   CINIT(CONV_TO_NETWORK_FUNCTION, FUNCTIONPOINT, 143),
1418 
1419   /* Function that will be called to convert from UTF8
1420      (instead of using the iconv calls in libcurl)
1421      Note that this is used only for SSL certificate processing */
1422   CINIT(CONV_FROM_UTF8_FUNCTION, FUNCTIONPOINT, 144),
1423 
1424   /* if the connection proceeds too quickly then need to slow it down */
1425   /* limit-rate: maximum number of bytes per second to send or receive */
1426   CINIT(MAX_SEND_SPEED_LARGE, OFF_T, 145),
1427   CINIT(MAX_RECV_SPEED_LARGE, OFF_T, 146),
1428 
1429   /* Pointer to command string to send if USER/PASS fails. */
1430   CINIT(FTP_ALTERNATIVE_TO_USER, STRINGPOINT, 147),
1431 
1432   /* callback function for setting socket options */
1433   CINIT(SOCKOPTFUNCTION, FUNCTIONPOINT, 148),
1434   CINIT(SOCKOPTDATA, OBJECTPOINT, 149),
1435 
1436   /* set to 0 to disable session ID re-use for this transfer, default is
1437      enabled (== 1) */
1438   CINIT(SSL_SESSIONID_CACHE, LONG, 150),
1439 
1440   /* allowed SSH authentication methods */
1441   CINIT(SSH_AUTH_TYPES, LONG, 151),
1442 
1443   /* Used by scp/sftp to do public/private key authentication */
1444   CINIT(SSH_PUBLIC_KEYFILE, STRINGPOINT, 152),
1445   CINIT(SSH_PRIVATE_KEYFILE, STRINGPOINT, 153),
1446 
1447   /* Send CCC (Clear Command Channel) after authentication */
1448   CINIT(FTP_SSL_CCC, LONG, 154),
1449 
1450   /* Same as TIMEOUT and CONNECTTIMEOUT, but with ms resolution */
1451   CINIT(TIMEOUT_MS, LONG, 155),
1452   CINIT(CONNECTTIMEOUT_MS, LONG, 156),
1453 
1454   /* set to zero to disable the libcurl's decoding and thus pass the raw body
1455      data to the application even when it is encoded/compressed */
1456   CINIT(HTTP_TRANSFER_DECODING, LONG, 157),
1457   CINIT(HTTP_CONTENT_DECODING, LONG, 158),
1458 
1459   /* Permission used when creating new files and directories on the remote
1460      server for protocols that support it, SFTP/SCP/FILE */
1461   CINIT(NEW_FILE_PERMS, LONG, 159),
1462   CINIT(NEW_DIRECTORY_PERMS, LONG, 160),
1463 
1464   /* Set the behaviour of POST when redirecting. Values must be set to one
1465      of CURL_REDIR* defines below. This used to be called CURLOPT_POST301 */
1466   CINIT(POSTREDIR, LONG, 161),
1467 
1468   /* used by scp/sftp to verify the host's public key */
1469   CINIT(SSH_HOST_PUBLIC_KEY_MD5, STRINGPOINT, 162),
1470 
1471   /* Callback function for opening socket (instead of socket(2)). Optionally,
1472      callback is able change the address or refuse to connect returning
1473      CURL_SOCKET_BAD.  The callback should have type
1474      curl_opensocket_callback */
1475   CINIT(OPENSOCKETFUNCTION, FUNCTIONPOINT, 163),
1476   CINIT(OPENSOCKETDATA, OBJECTPOINT, 164),
1477 
1478   /* POST volatile input fields. */
1479   CINIT(COPYPOSTFIELDS, OBJECTPOINT, 165),
1480 
1481   /* set transfer mode (;type=<a|i>) when doing FTP via an HTTP proxy */
1482   CINIT(PROXY_TRANSFER_MODE, LONG, 166),
1483 
1484   /* Callback function for seeking in the input stream */
1485   CINIT(SEEKFUNCTION, FUNCTIONPOINT, 167),
1486   CINIT(SEEKDATA, OBJECTPOINT, 168),
1487 
1488   /* CRL file */
1489   CINIT(CRLFILE, STRINGPOINT, 169),
1490 
1491   /* Issuer certificate */
1492   CINIT(ISSUERCERT, STRINGPOINT, 170),
1493 
1494   /* (IPv6) Address scope */
1495   CINIT(ADDRESS_SCOPE, LONG, 171),
1496 
1497   /* Collect certificate chain info and allow it to get retrievable with
1498      CURLINFO_CERTINFO after the transfer is complete. */
1499   CINIT(CERTINFO, LONG, 172),
1500 
1501   /* "name" and "pwd" to use when fetching. */
1502   CINIT(USERNAME, STRINGPOINT, 173),
1503   CINIT(PASSWORD, STRINGPOINT, 174),
1504 
1505     /* "name" and "pwd" to use with Proxy when fetching. */
1506   CINIT(PROXYUSERNAME, STRINGPOINT, 175),
1507   CINIT(PROXYPASSWORD, STRINGPOINT, 176),
1508 
1509   /* Comma separated list of hostnames defining no-proxy zones. These should
1510      match both hostnames directly, and hostnames within a domain. For
1511      example, local.com will match local.com and www.local.com, but NOT
1512      notlocal.com or www.notlocal.com. For compatibility with other
1513      implementations of this, .local.com will be considered to be the same as
1514      local.com. A single * is the only valid wildcard, and effectively
1515      disables the use of proxy. */
1516   CINIT(NOPROXY, STRINGPOINT, 177),
1517 
1518   /* block size for TFTP transfers */
1519   CINIT(TFTP_BLKSIZE, LONG, 178),
1520 
1521   /* Socks Service */
1522   CINIT(SOCKS5_GSSAPI_SERVICE, STRINGPOINT, 179), /* DEPRECATED, do not use! */
1523 
1524   /* Socks Service */
1525   CINIT(SOCKS5_GSSAPI_NEC, LONG, 180),
1526 
1527   /* set the bitmask for the protocols that are allowed to be used for the
1528      transfer, which thus helps the app which takes URLs from users or other
1529      external inputs and want to restrict what protocol(s) to deal
1530      with. Defaults to CURLPROTO_ALL. */
1531   CINIT(PROTOCOLS, LONG, 181),
1532 
1533   /* set the bitmask for the protocols that libcurl is allowed to follow to,
1534      as a subset of the CURLOPT_PROTOCOLS ones. That means the protocol needs
1535      to be set in both bitmasks to be allowed to get redirected to. Defaults
1536      to all protocols except FILE and SCP. */
1537   CINIT(REDIR_PROTOCOLS, LONG, 182),
1538 
1539   /* set the SSH knownhost file name to use */
1540   CINIT(SSH_KNOWNHOSTS, STRINGPOINT, 183),
1541 
1542   /* set the SSH host key callback, must point to a curl_sshkeycallback
1543      function */
1544   CINIT(SSH_KEYFUNCTION, FUNCTIONPOINT, 184),
1545 
1546   /* set the SSH host key callback custom pointer */
1547   CINIT(SSH_KEYDATA, OBJECTPOINT, 185),
1548 
1549   /* set the SMTP mail originator */
1550   CINIT(MAIL_FROM, STRINGPOINT, 186),
1551 
1552   /* set the list of SMTP mail receiver(s) */
1553   CINIT(MAIL_RCPT, OBJECTPOINT, 187),
1554 
1555   /* FTP: send PRET before PASV */
1556   CINIT(FTP_USE_PRET, LONG, 188),
1557 
1558   /* RTSP request method (OPTIONS, SETUP, PLAY, etc...) */
1559   CINIT(RTSP_REQUEST, LONG, 189),
1560 
1561   /* The RTSP session identifier */
1562   CINIT(RTSP_SESSION_ID, STRINGPOINT, 190),
1563 
1564   /* The RTSP stream URI */
1565   CINIT(RTSP_STREAM_URI, STRINGPOINT, 191),
1566 
1567   /* The Transport: header to use in RTSP requests */
1568   CINIT(RTSP_TRANSPORT, STRINGPOINT, 192),
1569 
1570   /* Manually initialize the client RTSP CSeq for this handle */
1571   CINIT(RTSP_CLIENT_CSEQ, LONG, 193),
1572 
1573   /* Manually initialize the server RTSP CSeq for this handle */
1574   CINIT(RTSP_SERVER_CSEQ, LONG, 194),
1575 
1576   /* The stream to pass to INTERLEAVEFUNCTION. */
1577   CINIT(INTERLEAVEDATA, OBJECTPOINT, 195),
1578 
1579   /* Let the application define a custom write method for RTP data */
1580   CINIT(INTERLEAVEFUNCTION, FUNCTIONPOINT, 196),
1581 
1582   /* Turn on wildcard matching */
1583   CINIT(WILDCARDMATCH, LONG, 197),
1584 
1585   /* Directory matching callback called before downloading of an
1586      individual file (chunk) started */
1587   CINIT(CHUNK_BGN_FUNCTION, FUNCTIONPOINT, 198),
1588 
1589   /* Directory matching callback called after the file (chunk)
1590      was downloaded, or skipped */
1591   CINIT(CHUNK_END_FUNCTION, FUNCTIONPOINT, 199),
1592 
1593   /* Change match (fnmatch-like) callback for wildcard matching */
1594   CINIT(FNMATCH_FUNCTION, FUNCTIONPOINT, 200),
1595 
1596   /* Let the application define custom chunk data pointer */
1597   CINIT(CHUNK_DATA, OBJECTPOINT, 201),
1598 
1599   /* FNMATCH_FUNCTION user pointer */
1600   CINIT(FNMATCH_DATA, OBJECTPOINT, 202),
1601 
1602   /* send linked-list of name:port:address sets */
1603   CINIT(RESOLVE, OBJECTPOINT, 203),
1604 
1605   /* Set a username for authenticated TLS */
1606   CINIT(TLSAUTH_USERNAME, STRINGPOINT, 204),
1607 
1608   /* Set a password for authenticated TLS */
1609   CINIT(TLSAUTH_PASSWORD, STRINGPOINT, 205),
1610 
1611   /* Set authentication type for authenticated TLS */
1612   CINIT(TLSAUTH_TYPE, STRINGPOINT, 206),
1613 
1614   /* Set to 1 to enable the "TE:" header in HTTP requests to ask for
1615      compressed transfer-encoded responses. Set to 0 to disable the use of TE:
1616      in outgoing requests. The current default is 0, but it might change in a
1617      future libcurl release.
1618 
1619      libcurl will ask for the compressed methods it knows of, and if that
1620      isn't any, it will not ask for transfer-encoding at all even if this
1621      option is set to 1.
1622 
1623   */
1624   CINIT(TRANSFER_ENCODING, LONG, 207),
1625 
1626   /* Callback function for closing socket (instead of close(2)). The callback
1627      should have type curl_closesocket_callback */
1628   CINIT(CLOSESOCKETFUNCTION, FUNCTIONPOINT, 208),
1629   CINIT(CLOSESOCKETDATA, OBJECTPOINT, 209),
1630 
1631   /* allow GSSAPI credential delegation */
1632   CINIT(GSSAPI_DELEGATION, LONG, 210),
1633 
1634   /* Set the name servers to use for DNS resolution */
1635   CINIT(DNS_SERVERS, STRINGPOINT, 211),
1636 
1637   /* Time-out accept operations (currently for FTP only) after this amount
1638      of milliseconds. */
1639   CINIT(ACCEPTTIMEOUT_MS, LONG, 212),
1640 
1641   /* Set TCP keepalive */
1642   CINIT(TCP_KEEPALIVE, LONG, 213),
1643 
1644   /* non-universal keepalive knobs (Linux, AIX, HP-UX, more) */
1645   CINIT(TCP_KEEPIDLE, LONG, 214),
1646   CINIT(TCP_KEEPINTVL, LONG, 215),
1647 
1648   /* Enable/disable specific SSL features with a bitmask, see CURLSSLOPT_* */
1649   CINIT(SSL_OPTIONS, LONG, 216),
1650 
1651   /* Set the SMTP auth originator */
1652   CINIT(MAIL_AUTH, STRINGPOINT, 217),
1653 
1654   /* Enable/disable SASL initial response */
1655   CINIT(SASL_IR, LONG, 218),
1656 
1657   /* Function that will be called instead of the internal progress display
1658    * function. This function should be defined as the curl_xferinfo_callback
1659    * prototype defines. (Deprecates CURLOPT_PROGRESSFUNCTION) */
1660   CINIT(XFERINFOFUNCTION, FUNCTIONPOINT, 219),
1661 
1662   /* The XOAUTH2 bearer token */
1663   CINIT(XOAUTH2_BEARER, STRINGPOINT, 220),
1664 
1665   /* Set the interface string to use as outgoing network
1666    * interface for DNS requests.
1667    * Only supported by the c-ares DNS backend */
1668   CINIT(DNS_INTERFACE, STRINGPOINT, 221),
1669 
1670   /* Set the local IPv4 address to use for outgoing DNS requests.
1671    * Only supported by the c-ares DNS backend */
1672   CINIT(DNS_LOCAL_IP4, STRINGPOINT, 222),
1673 
1674   /* Set the local IPv6 address to use for outgoing DNS requests.
1675    * Only supported by the c-ares DNS backend */
1676   CINIT(DNS_LOCAL_IP6, STRINGPOINT, 223),
1677 
1678   /* Set authentication options directly */
1679   CINIT(LOGIN_OPTIONS, STRINGPOINT, 224),
1680 
1681   /* Enable/disable TLS NPN extension (http2 over ssl might fail without) */
1682   CINIT(SSL_ENABLE_NPN, LONG, 225),
1683 
1684   /* Enable/disable TLS ALPN extension (http2 over ssl might fail without) */
1685   CINIT(SSL_ENABLE_ALPN, LONG, 226),
1686 
1687   /* Time to wait for a response to a HTTP request containing an
1688    * Expect: 100-continue header before sending the data anyway. */
1689   CINIT(EXPECT_100_TIMEOUT_MS, LONG, 227),
1690 
1691   /* This points to a linked list of headers used for proxy requests only,
1692      struct curl_slist kind */
1693   CINIT(PROXYHEADER, OBJECTPOINT, 228),
1694 
1695   /* Pass in a bitmask of "header options" */
1696   CINIT(HEADEROPT, LONG, 229),
1697 
1698   /* The public key in DER form used to validate the peer public key
1699      this option is used only if SSL_VERIFYPEER is true */
1700   CINIT(PINNEDPUBLICKEY, STRINGPOINT, 230),
1701 
1702   /* Path to Unix domain socket */
1703   CINIT(UNIX_SOCKET_PATH, STRINGPOINT, 231),
1704 
1705   /* Set if we should verify the certificate status. */
1706   CINIT(SSL_VERIFYSTATUS, LONG, 232),
1707 
1708   /* Set if we should enable TLS false start. */
1709   CINIT(SSL_FALSESTART, LONG, 233),
1710 
1711   /* Do not squash dot-dot sequences */
1712   CINIT(PATH_AS_IS, LONG, 234),
1713 
1714   /* Proxy Service Name */
1715   CINIT(PROXY_SERVICE_NAME, STRINGPOINT, 235),
1716 
1717   /* Service Name */
1718   CINIT(SERVICE_NAME, STRINGPOINT, 236),
1719 
1720   /* Wait/don't wait for pipe/mutex to clarify */
1721   CINIT(PIPEWAIT, LONG, 237),
1722 
1723   /* Set the protocol used when curl is given a URL without a protocol */
1724   CINIT(DEFAULT_PROTOCOL, STRINGPOINT, 238),
1725 
1726   /* Set stream weight, 1 - 256 (default is 16) */
1727   CINIT(STREAM_WEIGHT, LONG, 239),
1728 
1729   /* Set stream dependency on another CURL handle */
1730   CINIT(STREAM_DEPENDS, OBJECTPOINT, 240),
1731 
1732   /* Set E-xclusive stream dependency on another CURL handle */
1733   CINIT(STREAM_DEPENDS_E, OBJECTPOINT, 241),
1734 
1735   /* Do not send any tftp option requests to the server */
1736   CINIT(TFTP_NO_OPTIONS, LONG, 242),
1737 
1738   /* Linked-list of host:port:connect-to-host:connect-to-port,
1739      overrides the URL's host:port (only for the network layer) */
1740   CINIT(CONNECT_TO, OBJECTPOINT, 243),
1741 
1742   /* Set TCP Fast Open */
1743   CINIT(TCP_FASTOPEN, LONG, 244),
1744 
1745   /* Continue to send data if the server responds early with an
1746    * HTTP status code >= 300 */
1747   CINIT(KEEP_SENDING_ON_ERROR, LONG, 245),
1748 
1749   /* The CApath or CAfile used to validate the proxy certificate
1750      this option is used only if PROXY_SSL_VERIFYPEER is true */
1751   CINIT(PROXY_CAINFO, STRINGPOINT, 246),
1752 
1753   /* The CApath directory used to validate the proxy certificate
1754      this option is used only if PROXY_SSL_VERIFYPEER is true */
1755   CINIT(PROXY_CAPATH, STRINGPOINT, 247),
1756 
1757   /* Set if we should verify the proxy in ssl handshake,
1758      set 1 to verify. */
1759   CINIT(PROXY_SSL_VERIFYPEER, LONG, 248),
1760 
1761   /* Set if we should verify the Common name from the proxy certificate in ssl
1762    * handshake, set 1 to check existence, 2 to ensure that it matches
1763    * the provided hostname. */
1764   CINIT(PROXY_SSL_VERIFYHOST, LONG, 249),
1765 
1766   /* What version to specifically try to use for proxy.
1767      See CURL_SSLVERSION defines below. */
1768   CINIT(PROXY_SSLVERSION, LONG, 250),
1769 
1770   /* Set a username for authenticated TLS for proxy */
1771   CINIT(PROXY_TLSAUTH_USERNAME, STRINGPOINT, 251),
1772 
1773   /* Set a password for authenticated TLS for proxy */
1774   CINIT(PROXY_TLSAUTH_PASSWORD, STRINGPOINT, 252),
1775 
1776   /* Set authentication type for authenticated TLS for proxy */
1777   CINIT(PROXY_TLSAUTH_TYPE, STRINGPOINT, 253),
1778 
1779   /* name of the file keeping your private SSL-certificate for proxy */
1780   CINIT(PROXY_SSLCERT, STRINGPOINT, 254),
1781 
1782   /* type of the file keeping your SSL-certificate ("DER", "PEM", "ENG") for
1783      proxy */
1784   CINIT(PROXY_SSLCERTTYPE, STRINGPOINT, 255),
1785 
1786   /* name of the file keeping your private SSL-key for proxy */
1787   CINIT(PROXY_SSLKEY, STRINGPOINT, 256),
1788 
1789   /* type of the file keeping your private SSL-key ("DER", "PEM", "ENG") for
1790      proxy */
1791   CINIT(PROXY_SSLKEYTYPE, STRINGPOINT, 257),
1792 
1793   /* password for the SSL private key for proxy */
1794   CINIT(PROXY_KEYPASSWD, STRINGPOINT, 258),
1795 
1796   /* Specify which SSL ciphers to use for proxy */
1797   CINIT(PROXY_SSL_CIPHER_LIST, STRINGPOINT, 259),
1798 
1799   /* CRL file for proxy */
1800   CINIT(PROXY_CRLFILE, STRINGPOINT, 260),
1801 
1802   /* Enable/disable specific SSL features with a bitmask for proxy, see
1803      CURLSSLOPT_* */
1804   CINIT(PROXY_SSL_OPTIONS, LONG, 261),
1805 
1806   /* Name of pre proxy to use. */
1807   CINIT(PRE_PROXY, STRINGPOINT, 262),
1808 
1809   /* The public key in DER form used to validate the proxy public key
1810      this option is used only if PROXY_SSL_VERIFYPEER is true */
1811   CINIT(PROXY_PINNEDPUBLICKEY, STRINGPOINT, 263),
1812 
1813   /* Path to an abstract Unix domain socket */
1814   CINIT(ABSTRACT_UNIX_SOCKET, STRINGPOINT, 264),
1815 
1816   /* Suppress proxy CONNECT response headers from user callbacks */
1817   CINIT(SUPPRESS_CONNECT_HEADERS, LONG, 265),
1818 
1819   /* The request target, instead of extracted from the URL */
1820   CINIT(REQUEST_TARGET, STRINGPOINT, 266),
1821 
1822   /* bitmask of allowed auth methods for connections to SOCKS5 proxies */
1823   CINIT(SOCKS5_AUTH, LONG, 267),
1824 
1825   /* Enable/disable SSH compression */
1826   CINIT(SSH_COMPRESSION, LONG, 268),
1827 
1828   /* Post MIME data. */
1829   CINIT(MIMEPOST, OBJECTPOINT, 269),
1830 
1831   /* Time to use with the CURLOPT_TIMECONDITION. Specified in number of
1832      seconds since 1 Jan 1970. */
1833   CINIT(TIMEVALUE_LARGE, OFF_T, 270),
1834 
1835   /* Head start in milliseconds to give happy eyeballs. */
1836   CINIT(HAPPY_EYEBALLS_TIMEOUT_MS, LONG, 271),
1837 
1838   /* Function that will be called before a resolver request is made */
1839   CINIT(RESOLVER_START_FUNCTION, FUNCTIONPOINT, 272),
1840 
1841   /* User data to pass to the resolver start callback. */
1842   CINIT(RESOLVER_START_DATA, OBJECTPOINT, 273),
1843 
1844   /* send HAProxy PROXY protocol header? */
1845   CINIT(HAPROXYPROTOCOL, LONG, 274),
1846 
1847   /* shuffle addresses before use when DNS returns multiple */
1848   CINIT(DNS_SHUFFLE_ADDRESSES, LONG, 275),
1849 
1850   CURLOPT_LASTENTRY /* the last unused */
1851 } CURLoption;
1852 
1853 #ifndef CURL_NO_OLDIES /* define this to test if your app builds with all
1854                           the obsolete stuff removed! */
1855 
1856 /* Backwards compatibility with older names */
1857 /* These are scheduled to disappear by 2011 */
1858 
1859 /* This was added in version 7.19.1 */
1860 #define CURLOPT_POST301 CURLOPT_POSTREDIR
1861 
1862 /* These are scheduled to disappear by 2009 */
1863 
1864 /* The following were added in 7.17.0 */
1865 #define CURLOPT_SSLKEYPASSWD CURLOPT_KEYPASSWD
1866 #define CURLOPT_FTPAPPEND CURLOPT_APPEND
1867 #define CURLOPT_FTPLISTONLY CURLOPT_DIRLISTONLY
1868 #define CURLOPT_FTP_SSL CURLOPT_USE_SSL
1869 
1870 /* The following were added earlier */
1871 
1872 #define CURLOPT_SSLCERTPASSWD CURLOPT_KEYPASSWD
1873 #define CURLOPT_KRB4LEVEL CURLOPT_KRBLEVEL
1874 
1875 #else
1876 /* This is set if CURL_NO_OLDIES is defined at compile-time */
1877 #undef CURLOPT_DNS_USE_GLOBAL_CACHE /* soon obsolete */
1878 #endif
1879 
1880 
1881   /* Below here follows defines for the CURLOPT_IPRESOLVE option. If a host
1882      name resolves addresses using more than one IP protocol version, this
1883      option might be handy to force libcurl to use a specific IP version. */
1884 #define CURL_IPRESOLVE_WHATEVER 0 /* default, resolves addresses to all IP
1885                                      versions that your system allows */
1886 #define CURL_IPRESOLVE_V4       1 /* resolve to IPv4 addresses */
1887 #define CURL_IPRESOLVE_V6       2 /* resolve to IPv6 addresses */
1888 
1889   /* three convenient "aliases" that follow the name scheme better */
1890 #define CURLOPT_RTSPHEADER CURLOPT_HTTPHEADER
1891 
1892   /* These enums are for use with the CURLOPT_HTTP_VERSION option. */
1893 enum {
1894   CURL_HTTP_VERSION_NONE, /* setting this means we don't care, and that we'd
1895                              like the library to choose the best possible
1896                              for us! */
1897   CURL_HTTP_VERSION_1_0,  /* please use HTTP 1.0 in the request */
1898   CURL_HTTP_VERSION_1_1,  /* please use HTTP 1.1 in the request */
1899   CURL_HTTP_VERSION_2_0,  /* please use HTTP 2 in the request */
1900   CURL_HTTP_VERSION_2TLS, /* use version 2 for HTTPS, version 1.1 for HTTP */
1901   CURL_HTTP_VERSION_2_PRIOR_KNOWLEDGE,  /* please use HTTP 2 without HTTP/1.1
1902                                            Upgrade */
1903 
1904   CURL_HTTP_VERSION_LAST /* *ILLEGAL* http version */
1905 };
1906 
1907 /* Convenience definition simple because the name of the version is HTTP/2 and
1908    not 2.0. The 2_0 version of the enum name was set while the version was
1909    still planned to be 2.0 and we stick to it for compatibility. */
1910 #define CURL_HTTP_VERSION_2 CURL_HTTP_VERSION_2_0
1911 
1912 /*
1913  * Public API enums for RTSP requests
1914  */
1915 enum {
1916     CURL_RTSPREQ_NONE, /* first in list */
1917     CURL_RTSPREQ_OPTIONS,
1918     CURL_RTSPREQ_DESCRIBE,
1919     CURL_RTSPREQ_ANNOUNCE,
1920     CURL_RTSPREQ_SETUP,
1921     CURL_RTSPREQ_PLAY,
1922     CURL_RTSPREQ_PAUSE,
1923     CURL_RTSPREQ_TEARDOWN,
1924     CURL_RTSPREQ_GET_PARAMETER,
1925     CURL_RTSPREQ_SET_PARAMETER,
1926     CURL_RTSPREQ_RECORD,
1927     CURL_RTSPREQ_RECEIVE,
1928     CURL_RTSPREQ_LAST /* last in list */
1929 };
1930 
1931   /* These enums are for use with the CURLOPT_NETRC option. */
1932 enum CURL_NETRC_OPTION {
1933   CURL_NETRC_IGNORED,     /* The .netrc will never be read.
1934                            * This is the default. */
1935   CURL_NETRC_OPTIONAL,    /* A user:password in the URL will be preferred
1936                            * to one in the .netrc. */
1937   CURL_NETRC_REQUIRED,    /* A user:password in the URL will be ignored.
1938                            * Unless one is set programmatically, the .netrc
1939                            * will be queried. */
1940   CURL_NETRC_LAST
1941 };
1942 
1943 enum {
1944   CURL_SSLVERSION_DEFAULT,
1945   CURL_SSLVERSION_TLSv1, /* TLS 1.x */
1946   CURL_SSLVERSION_SSLv2,
1947   CURL_SSLVERSION_SSLv3,
1948   CURL_SSLVERSION_TLSv1_0,
1949   CURL_SSLVERSION_TLSv1_1,
1950   CURL_SSLVERSION_TLSv1_2,
1951   CURL_SSLVERSION_TLSv1_3,
1952 
1953   CURL_SSLVERSION_LAST /* never use, keep last */
1954 };
1955 
1956 enum {
1957   CURL_SSLVERSION_MAX_NONE =     0,
1958   CURL_SSLVERSION_MAX_DEFAULT =  (CURL_SSLVERSION_TLSv1   << 16),
1959   CURL_SSLVERSION_MAX_TLSv1_0 =  (CURL_SSLVERSION_TLSv1_0 << 16),
1960   CURL_SSLVERSION_MAX_TLSv1_1 =  (CURL_SSLVERSION_TLSv1_1 << 16),
1961   CURL_SSLVERSION_MAX_TLSv1_2 =  (CURL_SSLVERSION_TLSv1_2 << 16),
1962   CURL_SSLVERSION_MAX_TLSv1_3 =  (CURL_SSLVERSION_TLSv1_3 << 16),
1963 
1964   /* never use, keep last */
1965   CURL_SSLVERSION_MAX_LAST =     (CURL_SSLVERSION_LAST    << 16)
1966 };
1967 
1968 enum CURL_TLSAUTH {
1969   CURL_TLSAUTH_NONE,
1970   CURL_TLSAUTH_SRP,
1971   CURL_TLSAUTH_LAST /* never use, keep last */
1972 };
1973 
1974 /* symbols to use with CURLOPT_POSTREDIR.
1975    CURL_REDIR_POST_301, CURL_REDIR_POST_302 and CURL_REDIR_POST_303
1976    can be bitwise ORed so that CURL_REDIR_POST_301 | CURL_REDIR_POST_302
1977    | CURL_REDIR_POST_303 == CURL_REDIR_POST_ALL */
1978 
1979 #define CURL_REDIR_GET_ALL  0
1980 #define CURL_REDIR_POST_301 1
1981 #define CURL_REDIR_POST_302 2
1982 #define CURL_REDIR_POST_303 4
1983 #define CURL_REDIR_POST_ALL \
1984     (CURL_REDIR_POST_301|CURL_REDIR_POST_302|CURL_REDIR_POST_303)
1985 
1986 typedef enum {
1987   CURL_TIMECOND_NONE,
1988 
1989   CURL_TIMECOND_IFMODSINCE,
1990   CURL_TIMECOND_IFUNMODSINCE,
1991   CURL_TIMECOND_LASTMOD,
1992 
1993   CURL_TIMECOND_LAST
1994 } curl_TimeCond;
1995 
1996 /* Special size_t value signaling a zero-terminated string. */
1997 #define CURL_ZERO_TERMINATED ((size_t) -1)
1998 
1999 /* curl_strequal() and curl_strnequal() are subject for removal in a future
2000    release */
2001 CURL_EXTERN int curl_strequal(const char *s1, const char *s2);
2002 CURL_EXTERN int curl_strnequal(const char *s1, const char *s2, size_t n);
2003 
2004 /* Mime/form handling support. */
2005 typedef struct curl_mime_s      curl_mime;      /* Mime context. */
2006 typedef struct curl_mimepart_s  curl_mimepart;  /* Mime part context. */
2007 
2008 /*
2009  * NAME curl_mime_init()
2010  *
2011  * DESCRIPTION
2012  *
2013  * Create a mime context and return its handle. The easy parameter is the
2014  * target handle.
2015  */
2016 CURL_EXTERN curl_mime *curl_mime_init(CURL *easy);
2017 
2018 /*
2019  * NAME curl_mime_free()
2020  *
2021  * DESCRIPTION
2022  *
2023  * release a mime handle and its substructures.
2024  */
2025 CURL_EXTERN void curl_mime_free(curl_mime *mime);
2026 
2027 /*
2028  * NAME curl_mime_addpart()
2029  *
2030  * DESCRIPTION
2031  *
2032  * Append a new empty part to the given mime context and return a handle to
2033  * the created part.
2034  */
2035 CURL_EXTERN curl_mimepart *curl_mime_addpart(curl_mime *mime);
2036 
2037 /*
2038  * NAME curl_mime_name()
2039  *
2040  * DESCRIPTION
2041  *
2042  * Set mime/form part name.
2043  */
2044 CURL_EXTERN CURLcode curl_mime_name(curl_mimepart *part, const char *name);
2045 
2046 /*
2047  * NAME curl_mime_filename()
2048  *
2049  * DESCRIPTION
2050  *
2051  * Set mime part remote file name.
2052  */
2053 CURL_EXTERN CURLcode curl_mime_filename(curl_mimepart *part,
2054                                         const char *filename);
2055 
2056 /*
2057  * NAME curl_mime_type()
2058  *
2059  * DESCRIPTION
2060  *
2061  * Set mime part type.
2062  */
2063 CURL_EXTERN CURLcode curl_mime_type(curl_mimepart *part, const char *mimetype);
2064 
2065 /*
2066  * NAME curl_mime_encoder()
2067  *
2068  * DESCRIPTION
2069  *
2070  * Set mime data transfer encoder.
2071  */
2072 CURL_EXTERN CURLcode curl_mime_encoder(curl_mimepart *part,
2073                                        const char *encoding);
2074 
2075 /*
2076  * NAME curl_mime_data()
2077  *
2078  * DESCRIPTION
2079  *
2080  * Set mime part data source from memory data,
2081  */
2082 CURL_EXTERN CURLcode curl_mime_data(curl_mimepart *part,
2083                                     const char *data, size_t datasize);
2084 
2085 /*
2086  * NAME curl_mime_filedata()
2087  *
2088  * DESCRIPTION
2089  *
2090  * Set mime part data source from named file.
2091  */
2092 CURL_EXTERN CURLcode curl_mime_filedata(curl_mimepart *part,
2093                                         const char *filename);
2094 
2095 /*
2096  * NAME curl_mime_data_cb()
2097  *
2098  * DESCRIPTION
2099  *
2100  * Set mime part data source from callback function.
2101  */
2102 CURL_EXTERN CURLcode curl_mime_data_cb(curl_mimepart *part,
2103                                        curl_off_t datasize,
2104                                        curl_read_callback readfunc,
2105                                        curl_seek_callback seekfunc,
2106                                        curl_free_callback freefunc,
2107                                        void *arg);
2108 
2109 /*
2110  * NAME curl_mime_subparts()
2111  *
2112  * DESCRIPTION
2113  *
2114  * Set mime part data source from subparts.
2115  */
2116 CURL_EXTERN CURLcode curl_mime_subparts(curl_mimepart *part,
2117                                         curl_mime *subparts);
2118 /*
2119  * NAME curl_mime_headers()
2120  *
2121  * DESCRIPTION
2122  *
2123  * Set mime part headers.
2124  */
2125 CURL_EXTERN CURLcode curl_mime_headers(curl_mimepart *part,
2126                                        struct curl_slist *headers,
2127                                        int take_ownership);
2128 
2129 /* Old form API. */
2130 /* name is uppercase CURLFORM_<name> */
2131 #ifdef CFINIT
2132 #undef CFINIT
2133 #endif
2134 
2135 #ifdef CURL_ISOCPP
2136 #define CFINIT(name) CURLFORM_ ## name
2137 #else
2138 /* The macro "##" is ISO C, we assume pre-ISO C doesn't support it. */
2139 #define CFINIT(name) CURLFORM_/**/name
2140 #endif
2141 
2142 typedef enum {
2143   CFINIT(NOTHING),        /********* the first one is unused ************/
2144 
2145   /*  */
2146   CFINIT(COPYNAME),
2147   CFINIT(PTRNAME),
2148   CFINIT(NAMELENGTH),
2149   CFINIT(COPYCONTENTS),
2150   CFINIT(PTRCONTENTS),
2151   CFINIT(CONTENTSLENGTH),
2152   CFINIT(FILECONTENT),
2153   CFINIT(ARRAY),
2154   CFINIT(OBSOLETE),
2155   CFINIT(FILE),
2156 
2157   CFINIT(BUFFER),
2158   CFINIT(BUFFERPTR),
2159   CFINIT(BUFFERLENGTH),
2160 
2161   CFINIT(CONTENTTYPE),
2162   CFINIT(CONTENTHEADER),
2163   CFINIT(FILENAME),
2164   CFINIT(END),
2165   CFINIT(OBSOLETE2),
2166 
2167   CFINIT(STREAM),
2168   CFINIT(CONTENTLEN), /* added in 7.46.0, provide a curl_off_t length */
2169 
2170   CURLFORM_LASTENTRY /* the last unused */
2171 } CURLformoption;
2172 
2173 #undef CFINIT /* done */
2174 
2175 /* structure to be used as parameter for CURLFORM_ARRAY */
2176 struct curl_forms {
2177   CURLformoption option;
2178   const char     *value;
2179 };
2180 
2181 /* use this for multipart formpost building */
2182 /* Returns code for curl_formadd()
2183  *
2184  * Returns:
2185  * CURL_FORMADD_OK             on success
2186  * CURL_FORMADD_MEMORY         if the FormInfo allocation fails
2187  * CURL_FORMADD_OPTION_TWICE   if one option is given twice for one Form
2188  * CURL_FORMADD_NULL           if a null pointer was given for a char
2189  * CURL_FORMADD_MEMORY         if the allocation of a FormInfo struct failed
2190  * CURL_FORMADD_UNKNOWN_OPTION if an unknown option was used
2191  * CURL_FORMADD_INCOMPLETE     if the some FormInfo is not complete (or error)
2192  * CURL_FORMADD_MEMORY         if a curl_httppost struct cannot be allocated
2193  * CURL_FORMADD_MEMORY         if some allocation for string copying failed.
2194  * CURL_FORMADD_ILLEGAL_ARRAY  if an illegal option is used in an array
2195  *
2196  ***************************************************************************/
2197 typedef enum {
2198   CURL_FORMADD_OK, /* first, no error */
2199 
2200   CURL_FORMADD_MEMORY,
2201   CURL_FORMADD_OPTION_TWICE,
2202   CURL_FORMADD_NULL,
2203   CURL_FORMADD_UNKNOWN_OPTION,
2204   CURL_FORMADD_INCOMPLETE,
2205   CURL_FORMADD_ILLEGAL_ARRAY,
2206   CURL_FORMADD_DISABLED, /* libcurl was built with this disabled */
2207 
2208   CURL_FORMADD_LAST /* last */
2209 } CURLFORMcode;
2210 
2211 /*
2212  * NAME curl_formadd()
2213  *
2214  * DESCRIPTION
2215  *
2216  * Pretty advanced function for building multi-part formposts. Each invoke
2217  * adds one part that together construct a full post. Then use
2218  * CURLOPT_HTTPPOST to send it off to libcurl.
2219  */
2220 CURL_EXTERN CURLFORMcode curl_formadd(struct curl_httppost **httppost,
2221                                       struct curl_httppost **last_post,
2222                                       ...);
2223 
2224 /*
2225  * callback function for curl_formget()
2226  * The void *arg pointer will be the one passed as second argument to
2227  *   curl_formget().
2228  * The character buffer passed to it must not be freed.
2229  * Should return the buffer length passed to it as the argument "len" on
2230  *   success.
2231  */
2232 typedef size_t (*curl_formget_callback)(void *arg, const char *buf,
2233                                         size_t len);
2234 
2235 /*
2236  * NAME curl_formget()
2237  *
2238  * DESCRIPTION
2239  *
2240  * Serialize a curl_httppost struct built with curl_formadd().
2241  * Accepts a void pointer as second argument which will be passed to
2242  * the curl_formget_callback function.
2243  * Returns 0 on success.
2244  */
2245 CURL_EXTERN int curl_formget(struct curl_httppost *form, void *arg,
2246                              curl_formget_callback append);
2247 /*
2248  * NAME curl_formfree()
2249  *
2250  * DESCRIPTION
2251  *
2252  * Free a multipart formpost previously built with curl_formadd().
2253  */
2254 CURL_EXTERN void curl_formfree(struct curl_httppost *form);
2255 
2256 /*
2257  * NAME curl_getenv()
2258  *
2259  * DESCRIPTION
2260  *
2261  * Returns a malloc()'ed string that MUST be curl_free()ed after usage is
2262  * complete. DEPRECATED - see lib/README.curlx
2263  */
2264 CURL_EXTERN char *curl_getenv(const char *variable);
2265 
2266 /*
2267  * NAME curl_version()
2268  *
2269  * DESCRIPTION
2270  *
2271  * Returns a static ascii string of the libcurl version.
2272  */
2273 CURL_EXTERN char *curl_version(void);
2274 
2275 /*
2276  * NAME curl_easy_escape()
2277  *
2278  * DESCRIPTION
2279  *
2280  * Escapes URL strings (converts all letters consider illegal in URLs to their
2281  * %XX versions). This function returns a new allocated string or NULL if an
2282  * error occurred.
2283  */
2284 CURL_EXTERN char *curl_easy_escape(CURL *handle,
2285                                    const char *string,
2286                                    int length);
2287 
2288 /* the previous version: */
2289 CURL_EXTERN char *curl_escape(const char *string,
2290                               int length);
2291 
2292 
2293 /*
2294  * NAME curl_easy_unescape()
2295  *
2296  * DESCRIPTION
2297  *
2298  * Unescapes URL encoding in strings (converts all %XX codes to their 8bit
2299  * versions). This function returns a new allocated string or NULL if an error
2300  * occurred.
2301  * Conversion Note: On non-ASCII platforms the ASCII %XX codes are
2302  * converted into the host encoding.
2303  */
2304 CURL_EXTERN char *curl_easy_unescape(CURL *handle,
2305                                      const char *string,
2306                                      int length,
2307                                      int *outlength);
2308 
2309 /* the previous version */
2310 CURL_EXTERN char *curl_unescape(const char *string,
2311                                 int length);
2312 
2313 /*
2314  * NAME curl_free()
2315  *
2316  * DESCRIPTION
2317  *
2318  * Provided for de-allocation in the same translation unit that did the
2319  * allocation. Added in libcurl 7.10
2320  */
2321 CURL_EXTERN void curl_free(void *p);
2322 
2323 /*
2324  * NAME curl_global_init()
2325  *
2326  * DESCRIPTION
2327  *
2328  * curl_global_init() should be invoked exactly once for each application that
2329  * uses libcurl and before any call of other libcurl functions.
2330  *
2331  * This function is not thread-safe!
2332  */
2333 CURL_EXTERN CURLcode curl_global_init(long flags);
2334 
2335 /*
2336  * NAME curl_global_init_mem()
2337  *
2338  * DESCRIPTION
2339  *
2340  * curl_global_init() or curl_global_init_mem() should be invoked exactly once
2341  * for each application that uses libcurl.  This function can be used to
2342  * initialize libcurl and set user defined memory management callback
2343  * functions.  Users can implement memory management routines to check for
2344  * memory leaks, check for mis-use of the curl library etc.  User registered
2345  * callback routines with be invoked by this library instead of the system
2346  * memory management routines like malloc, free etc.
2347  */
2348 CURL_EXTERN CURLcode curl_global_init_mem(long flags,
2349                                           curl_malloc_callback m,
2350                                           curl_free_callback f,
2351                                           curl_realloc_callback r,
2352                                           curl_strdup_callback s,
2353                                           curl_calloc_callback c);
2354 
2355 /*
2356  * NAME curl_global_cleanup()
2357  *
2358  * DESCRIPTION
2359  *
2360  * curl_global_cleanup() should be invoked exactly once for each application
2361  * that uses libcurl
2362  */
2363 CURL_EXTERN void curl_global_cleanup(void);
2364 
2365 /* linked-list structure for the CURLOPT_QUOTE option (and other) */
2366 struct curl_slist {
2367   char *data;
2368   struct curl_slist *next;
2369 };
2370 
2371 /*
2372  * NAME curl_global_sslset()
2373  *
2374  * DESCRIPTION
2375  *
2376  * When built with multiple SSL backends, curl_global_sslset() allows to
2377  * choose one. This function can only be called once, and it must be called
2378  * *before* curl_global_init().
2379  *
2380  * The backend can be identified by the id (e.g. CURLSSLBACKEND_OPENSSL). The
2381  * backend can also be specified via the name parameter (passing -1 as id).
2382  * If both id and name are specified, the name will be ignored. If neither id
2383  * nor name are specified, the function will fail with
2384  * CURLSSLSET_UNKNOWN_BACKEND and set the "avail" pointer to the
2385  * NULL-terminated list of available backends.
2386  *
2387  * Upon success, the function returns CURLSSLSET_OK.
2388  *
2389  * If the specified SSL backend is not available, the function returns
2390  * CURLSSLSET_UNKNOWN_BACKEND and sets the "avail" pointer to a NULL-terminated
2391  * list of available SSL backends.
2392  *
2393  * The SSL backend can be set only once. If it has already been set, a
2394  * subsequent attempt to change it will result in a CURLSSLSET_TOO_LATE.
2395  */
2396 
2397 typedef struct {
2398   curl_sslbackend id;
2399   const char *name;
2400 } curl_ssl_backend;
2401 
2402 typedef enum {
2403   CURLSSLSET_OK = 0,
2404   CURLSSLSET_UNKNOWN_BACKEND,
2405   CURLSSLSET_TOO_LATE,
2406   CURLSSLSET_NO_BACKENDS /* libcurl was built without any SSL support */
2407 } CURLsslset;
2408 
2409 CURL_EXTERN CURLsslset curl_global_sslset(curl_sslbackend id, const char *name,
2410                                           const curl_ssl_backend ***avail);
2411 
2412 /*
2413  * NAME curl_slist_append()
2414  *
2415  * DESCRIPTION
2416  *
2417  * Appends a string to a linked list. If no list exists, it will be created
2418  * first. Returns the new list, after appending.
2419  */
2420 CURL_EXTERN struct curl_slist *curl_slist_append(struct curl_slist *,
2421                                                  const char *);
2422 
2423 /*
2424  * NAME curl_slist_free_all()
2425  *
2426  * DESCRIPTION
2427  *
2428  * free a previously built curl_slist.
2429  */
2430 CURL_EXTERN void curl_slist_free_all(struct curl_slist *);
2431 
2432 /*
2433  * NAME curl_getdate()
2434  *
2435  * DESCRIPTION
2436  *
2437  * Returns the time, in seconds since 1 Jan 1970 of the time string given in
2438  * the first argument. The time argument in the second parameter is unused
2439  * and should be set to NULL.
2440  */
2441 CURL_EXTERN time_t curl_getdate(const char *p, const time_t *unused);
2442 
2443 /* info about the certificate chain, only for OpenSSL builds. Asked
2444    for with CURLOPT_CERTINFO / CURLINFO_CERTINFO */
2445 struct curl_certinfo {
2446   int num_of_certs;             /* number of certificates with information */
2447   struct curl_slist **certinfo; /* for each index in this array, there's a
2448                                    linked list with textual information in the
2449                                    format "name: value" */
2450 };
2451 
2452 /* Information about the SSL library used and the respective internal SSL
2453    handle, which can be used to obtain further information regarding the
2454    connection. Asked for with CURLINFO_TLS_SSL_PTR or CURLINFO_TLS_SESSION. */
2455 struct curl_tlssessioninfo {
2456   curl_sslbackend backend;
2457   void *internals;
2458 };
2459 
2460 #define CURLINFO_STRING   0x100000
2461 #define CURLINFO_LONG     0x200000
2462 #define CURLINFO_DOUBLE   0x300000
2463 #define CURLINFO_SLIST    0x400000
2464 #define CURLINFO_PTR      0x400000 /* same as SLIST */
2465 #define CURLINFO_SOCKET   0x500000
2466 #define CURLINFO_OFF_T    0x600000
2467 #define CURLINFO_MASK     0x0fffff
2468 #define CURLINFO_TYPEMASK 0xf00000
2469 
2470 typedef enum {
2471   CURLINFO_NONE, /* first, never use this */
2472   CURLINFO_EFFECTIVE_URL    = CURLINFO_STRING + 1,
2473   CURLINFO_RESPONSE_CODE    = CURLINFO_LONG   + 2,
2474   CURLINFO_TOTAL_TIME       = CURLINFO_DOUBLE + 3,
2475   CURLINFO_NAMELOOKUP_TIME  = CURLINFO_DOUBLE + 4,
2476   CURLINFO_CONNECT_TIME     = CURLINFO_DOUBLE + 5,
2477   CURLINFO_PRETRANSFER_TIME = CURLINFO_DOUBLE + 6,
2478   CURLINFO_SIZE_UPLOAD      = CURLINFO_DOUBLE + 7,
2479   CURLINFO_SIZE_UPLOAD_T    = CURLINFO_OFF_T  + 7,
2480   CURLINFO_SIZE_DOWNLOAD    = CURLINFO_DOUBLE + 8,
2481   CURLINFO_SIZE_DOWNLOAD_T  = CURLINFO_OFF_T  + 8,
2482   CURLINFO_SPEED_DOWNLOAD   = CURLINFO_DOUBLE + 9,
2483   CURLINFO_SPEED_DOWNLOAD_T = CURLINFO_OFF_T  + 9,
2484   CURLINFO_SPEED_UPLOAD     = CURLINFO_DOUBLE + 10,
2485   CURLINFO_SPEED_UPLOAD_T   = CURLINFO_OFF_T  + 10,
2486   CURLINFO_HEADER_SIZE      = CURLINFO_LONG   + 11,
2487   CURLINFO_REQUEST_SIZE     = CURLINFO_LONG   + 12,
2488   CURLINFO_SSL_VERIFYRESULT = CURLINFO_LONG   + 13,
2489   CURLINFO_FILETIME         = CURLINFO_LONG   + 14,
2490   CURLINFO_FILETIME_T       = CURLINFO_OFF_T  + 14,
2491   CURLINFO_CONTENT_LENGTH_DOWNLOAD   = CURLINFO_DOUBLE + 15,
2492   CURLINFO_CONTENT_LENGTH_DOWNLOAD_T = CURLINFO_OFF_T  + 15,
2493   CURLINFO_CONTENT_LENGTH_UPLOAD     = CURLINFO_DOUBLE + 16,
2494   CURLINFO_CONTENT_LENGTH_UPLOAD_T   = CURLINFO_OFF_T  + 16,
2495   CURLINFO_STARTTRANSFER_TIME = CURLINFO_DOUBLE + 17,
2496   CURLINFO_CONTENT_TYPE     = CURLINFO_STRING + 18,
2497   CURLINFO_REDIRECT_TIME    = CURLINFO_DOUBLE + 19,
2498   CURLINFO_REDIRECT_COUNT   = CURLINFO_LONG   + 20,
2499   CURLINFO_PRIVATE          = CURLINFO_STRING + 21,
2500   CURLINFO_HTTP_CONNECTCODE = CURLINFO_LONG   + 22,
2501   CURLINFO_HTTPAUTH_AVAIL   = CURLINFO_LONG   + 23,
2502   CURLINFO_PROXYAUTH_AVAIL  = CURLINFO_LONG   + 24,
2503   CURLINFO_OS_ERRNO         = CURLINFO_LONG   + 25,
2504   CURLINFO_NUM_CONNECTS     = CURLINFO_LONG   + 26,
2505   CURLINFO_SSL_ENGINES      = CURLINFO_SLIST  + 27,
2506   CURLINFO_COOKIELIST       = CURLINFO_SLIST  + 28,
2507   CURLINFO_LASTSOCKET       = CURLINFO_LONG   + 29,
2508   CURLINFO_FTP_ENTRY_PATH   = CURLINFO_STRING + 30,
2509   CURLINFO_REDIRECT_URL     = CURLINFO_STRING + 31,
2510   CURLINFO_PRIMARY_IP       = CURLINFO_STRING + 32,
2511   CURLINFO_APPCONNECT_TIME  = CURLINFO_DOUBLE + 33,
2512   CURLINFO_CERTINFO         = CURLINFO_PTR    + 34,
2513   CURLINFO_CONDITION_UNMET  = CURLINFO_LONG   + 35,
2514   CURLINFO_RTSP_SESSION_ID  = CURLINFO_STRING + 36,
2515   CURLINFO_RTSP_CLIENT_CSEQ = CURLINFO_LONG   + 37,
2516   CURLINFO_RTSP_SERVER_CSEQ = CURLINFO_LONG   + 38,
2517   CURLINFO_RTSP_CSEQ_RECV   = CURLINFO_LONG   + 39,
2518   CURLINFO_PRIMARY_PORT     = CURLINFO_LONG   + 40,
2519   CURLINFO_LOCAL_IP         = CURLINFO_STRING + 41,
2520   CURLINFO_LOCAL_PORT       = CURLINFO_LONG   + 42,
2521   CURLINFO_TLS_SESSION      = CURLINFO_PTR    + 43,
2522   CURLINFO_ACTIVESOCKET     = CURLINFO_SOCKET + 44,
2523   CURLINFO_TLS_SSL_PTR      = CURLINFO_PTR    + 45,
2524   CURLINFO_HTTP_VERSION     = CURLINFO_LONG   + 46,
2525   CURLINFO_PROXY_SSL_VERIFYRESULT = CURLINFO_LONG + 47,
2526   CURLINFO_PROTOCOL         = CURLINFO_LONG   + 48,
2527   CURLINFO_SCHEME           = CURLINFO_STRING + 49,
2528   /* Fill in new entries below here! */
2529 
2530   CURLINFO_LASTONE          = 49
2531 } CURLINFO;
2532 
2533 /* CURLINFO_RESPONSE_CODE is the new name for the option previously known as
2534    CURLINFO_HTTP_CODE */
2535 #define CURLINFO_HTTP_CODE CURLINFO_RESPONSE_CODE
2536 
2537 typedef enum {
2538   CURLCLOSEPOLICY_NONE, /* first, never use this */
2539 
2540   CURLCLOSEPOLICY_OLDEST,
2541   CURLCLOSEPOLICY_LEAST_RECENTLY_USED,
2542   CURLCLOSEPOLICY_LEAST_TRAFFIC,
2543   CURLCLOSEPOLICY_SLOWEST,
2544   CURLCLOSEPOLICY_CALLBACK,
2545 
2546   CURLCLOSEPOLICY_LAST /* last, never use this */
2547 } curl_closepolicy;
2548 
2549 #define CURL_GLOBAL_SSL (1<<0) /* no purpose since since 7.57.0 */
2550 #define CURL_GLOBAL_WIN32 (1<<1)
2551 #define CURL_GLOBAL_ALL (CURL_GLOBAL_SSL|CURL_GLOBAL_WIN32)
2552 #define CURL_GLOBAL_NOTHING 0
2553 #define CURL_GLOBAL_DEFAULT CURL_GLOBAL_ALL
2554 #define CURL_GLOBAL_ACK_EINTR (1<<2)
2555 
2556 
2557 /*****************************************************************************
2558  * Setup defines, protos etc for the sharing stuff.
2559  */
2560 
2561 /* Different data locks for a single share */
2562 typedef enum {
2563   CURL_LOCK_DATA_NONE = 0,
2564   /*  CURL_LOCK_DATA_SHARE is used internally to say that
2565    *  the locking is just made to change the internal state of the share
2566    *  itself.
2567    */
2568   CURL_LOCK_DATA_SHARE,
2569   CURL_LOCK_DATA_COOKIE,
2570   CURL_LOCK_DATA_DNS,
2571   CURL_LOCK_DATA_SSL_SESSION,
2572   CURL_LOCK_DATA_CONNECT,
2573   CURL_LOCK_DATA_LAST
2574 } curl_lock_data;
2575 
2576 /* Different lock access types */
2577 typedef enum {
2578   CURL_LOCK_ACCESS_NONE = 0,   /* unspecified action */
2579   CURL_LOCK_ACCESS_SHARED = 1, /* for read perhaps */
2580   CURL_LOCK_ACCESS_SINGLE = 2, /* for write perhaps */
2581   CURL_LOCK_ACCESS_LAST        /* never use */
2582 } curl_lock_access;
2583 
2584 typedef void (*curl_lock_function)(CURL *handle,
2585                                    curl_lock_data data,
2586                                    curl_lock_access locktype,
2587                                    void *userptr);
2588 typedef void (*curl_unlock_function)(CURL *handle,
2589                                      curl_lock_data data,
2590                                      void *userptr);
2591 
2592 
2593 typedef enum {
2594   CURLSHE_OK,  /* all is fine */
2595   CURLSHE_BAD_OPTION, /* 1 */
2596   CURLSHE_IN_USE,     /* 2 */
2597   CURLSHE_INVALID,    /* 3 */
2598   CURLSHE_NOMEM,      /* 4 out of memory */
2599   CURLSHE_NOT_BUILT_IN, /* 5 feature not present in lib */
2600   CURLSHE_LAST        /* never use */
2601 } CURLSHcode;
2602 
2603 typedef enum {
2604   CURLSHOPT_NONE,  /* don't use */
2605   CURLSHOPT_SHARE,   /* specify a data type to share */
2606   CURLSHOPT_UNSHARE, /* specify which data type to stop sharing */
2607   CURLSHOPT_LOCKFUNC,   /* pass in a 'curl_lock_function' pointer */
2608   CURLSHOPT_UNLOCKFUNC, /* pass in a 'curl_unlock_function' pointer */
2609   CURLSHOPT_USERDATA,   /* pass in a user data pointer used in the lock/unlock
2610                            callback functions */
2611   CURLSHOPT_LAST  /* never use */
2612 } CURLSHoption;
2613 
2614 CURL_EXTERN CURLSH *curl_share_init(void);
2615 CURL_EXTERN CURLSHcode curl_share_setopt(CURLSH *, CURLSHoption option, ...);
2616 CURL_EXTERN CURLSHcode curl_share_cleanup(CURLSH *);
2617 
2618 /****************************************************************************
2619  * Structures for querying information about the curl library at runtime.
2620  */
2621 
2622 typedef enum {
2623   CURLVERSION_FIRST,
2624   CURLVERSION_SECOND,
2625   CURLVERSION_THIRD,
2626   CURLVERSION_FOURTH,
2627   CURLVERSION_FIFTH,
2628   CURLVERSION_LAST /* never actually use this */
2629 } CURLversion;
2630 
2631 /* The 'CURLVERSION_NOW' is the symbolic name meant to be used by
2632    basically all programs ever that want to get version information. It is
2633    meant to be a built-in version number for what kind of struct the caller
2634    expects. If the struct ever changes, we redefine the NOW to another enum
2635    from above. */
2636 #define CURLVERSION_NOW CURLVERSION_FIFTH
2637 
2638 typedef struct {
2639   CURLversion age;          /* age of the returned struct */
2640   const char *version;      /* LIBCURL_VERSION */
2641   unsigned int version_num; /* LIBCURL_VERSION_NUM */
2642   const char *host;         /* OS/host/cpu/machine when configured */
2643   int features;             /* bitmask, see defines below */
2644   const char *ssl_version;  /* human readable string */
2645   long ssl_version_num;     /* not used anymore, always 0 */
2646   const char *libz_version; /* human readable string */
2647   /* protocols is terminated by an entry with a NULL protoname */
2648   const char * const *protocols;
2649 
2650   /* The fields below this were added in CURLVERSION_SECOND */
2651   const char *ares;
2652   int ares_num;
2653 
2654   /* This field was added in CURLVERSION_THIRD */
2655   const char *libidn;
2656 
2657   /* These field were added in CURLVERSION_FOURTH */
2658 
2659   /* Same as '_libiconv_version' if built with HAVE_ICONV */
2660   int iconv_ver_num;
2661 
2662   const char *libssh_version; /* human readable string */
2663 
2664   /* These fields were added in CURLVERSION_FIFTH */
2665 
2666   unsigned int brotli_ver_num; /* Numeric Brotli version
2667                                   (MAJOR << 24) | (MINOR << 12) | PATCH */
2668   const char *brotli_version; /* human readable string. */
2669 
2670 } curl_version_info_data;
2671 
2672 #define CURL_VERSION_IPV6         (1<<0)  /* IPv6-enabled */
2673 #define CURL_VERSION_KERBEROS4    (1<<1)  /* Kerberos V4 auth is supported
2674                                              (deprecated) */
2675 #define CURL_VERSION_SSL          (1<<2)  /* SSL options are present */
2676 #define CURL_VERSION_LIBZ         (1<<3)  /* libz features are present */
2677 #define CURL_VERSION_NTLM         (1<<4)  /* NTLM auth is supported */
2678 #define CURL_VERSION_GSSNEGOTIATE (1<<5)  /* Negotiate auth is supported
2679                                              (deprecated) */
2680 #define CURL_VERSION_DEBUG        (1<<6)  /* Built with debug capabilities */
2681 #define CURL_VERSION_ASYNCHDNS    (1<<7)  /* Asynchronous DNS resolves */
2682 #define CURL_VERSION_SPNEGO       (1<<8)  /* SPNEGO auth is supported */
2683 #define CURL_VERSION_LARGEFILE    (1<<9)  /* Supports files larger than 2GB */
2684 #define CURL_VERSION_IDN          (1<<10) /* Internationized Domain Names are
2685                                              supported */
2686 #define CURL_VERSION_SSPI         (1<<11) /* Built against Windows SSPI */
2687 #define CURL_VERSION_CONV         (1<<12) /* Character conversions supported */
2688 #define CURL_VERSION_CURLDEBUG    (1<<13) /* Debug memory tracking supported */
2689 #define CURL_VERSION_TLSAUTH_SRP  (1<<14) /* TLS-SRP auth is supported */
2690 #define CURL_VERSION_NTLM_WB      (1<<15) /* NTLM delegation to winbind helper
2691                                              is supported */
2692 #define CURL_VERSION_HTTP2        (1<<16) /* HTTP2 support built-in */
2693 #define CURL_VERSION_GSSAPI       (1<<17) /* Built against a GSS-API library */
2694 #define CURL_VERSION_KERBEROS5    (1<<18) /* Kerberos V5 auth is supported */
2695 #define CURL_VERSION_UNIX_SOCKETS (1<<19) /* Unix domain sockets support */
2696 #define CURL_VERSION_PSL          (1<<20) /* Mozilla's Public Suffix List, used
2697                                              for cookie domain verification */
2698 #define CURL_VERSION_HTTPS_PROXY  (1<<21) /* HTTPS-proxy support built-in */
2699 #define CURL_VERSION_MULTI_SSL    (1<<22) /* Multiple SSL backends available */
2700 #define CURL_VERSION_BROTLI       (1<<23) /* Brotli features are present. */
2701 
2702  /*
2703  * NAME curl_version_info()
2704  *
2705  * DESCRIPTION
2706  *
2707  * This function returns a pointer to a static copy of the version info
2708  * struct. See above.
2709  */
2710 CURL_EXTERN curl_version_info_data *curl_version_info(CURLversion);
2711 
2712 /*
2713  * NAME curl_easy_strerror()
2714  *
2715  * DESCRIPTION
2716  *
2717  * The curl_easy_strerror function may be used to turn a CURLcode value
2718  * into the equivalent human readable error string.  This is useful
2719  * for printing meaningful error messages.
2720  */
2721 CURL_EXTERN const char *curl_easy_strerror(CURLcode);
2722 
2723 /*
2724  * NAME curl_share_strerror()
2725  *
2726  * DESCRIPTION
2727  *
2728  * The curl_share_strerror function may be used to turn a CURLSHcode value
2729  * into the equivalent human readable error string.  This is useful
2730  * for printing meaningful error messages.
2731  */
2732 CURL_EXTERN const char *curl_share_strerror(CURLSHcode);
2733 
2734 /*
2735  * NAME curl_easy_pause()
2736  *
2737  * DESCRIPTION
2738  *
2739  * The curl_easy_pause function pauses or unpauses transfers. Select the new
2740  * state by setting the bitmask, use the convenience defines below.
2741  *
2742  */
2743 CURL_EXTERN CURLcode curl_easy_pause(CURL *handle, int bitmask);
2744 
2745 #define CURLPAUSE_RECV      (1<<0)
2746 #define CURLPAUSE_RECV_CONT (0)
2747 
2748 #define CURLPAUSE_SEND      (1<<2)
2749 #define CURLPAUSE_SEND_CONT (0)
2750 
2751 #define CURLPAUSE_ALL       (CURLPAUSE_RECV|CURLPAUSE_SEND)
2752 #define CURLPAUSE_CONT      (CURLPAUSE_RECV_CONT|CURLPAUSE_SEND_CONT)
2753 
2754 #ifdef  __cplusplus
2755 }
2756 #endif
2757 
2758 /* unfortunately, the easy.h and multi.h include files need options and info
2759   stuff before they can be included! */
2760 #include "easy.h" /* nothing in curl is fun without the easy stuff */
2761 #include "multi.h"
2762 
2763 /* the typechecker doesn't work in C++ (yet) */
2764 #if defined(__GNUC__) && defined(__GNUC_MINOR__) && \
2765     ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) && \
2766     !defined(__cplusplus) && !defined(CURL_DISABLE_TYPECHECK)
2767 #include "typecheck-gcc.h"
2768 #else
2769 #if defined(__STDC__) && (__STDC__ >= 1)
2770 /* This preprocessor magic that replaces a call with the exact same call is
2771    only done to make sure application authors pass exactly three arguments
2772    to these functions. */
2773 #define curl_easy_setopt(handle,opt,param) curl_easy_setopt(handle,opt,param)
2774 #define curl_easy_getinfo(handle,info,arg) curl_easy_getinfo(handle,info,arg)
2775 #define curl_share_setopt(share,opt,param) curl_share_setopt(share,opt,param)
2776 #define curl_multi_setopt(handle,opt,param) curl_multi_setopt(handle,opt,param)
2777 #endif /* __STDC__ >= 1 */
2778 #endif /* gcc >= 4.3 && !__cplusplus */
2779 
2780 #endif /* __CURL_CURL_H */
2781