aboutsummaryrefslogtreecommitdiff
path: root/lib/urldata.h
blob: 325c06b4946d75bf5f8a812014c42dbec01e0b9c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
#ifndef __URLDATA_H
#define __URLDATA_H
/*****************************************************************************
 *                                  _   _ ____  _     
 *  Project                     ___| | | |  _ \| |    
 *                             / __| | | | |_) | |    
 *                            | (__| |_| |  _ <| |___ 
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 2000, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * In order to be useful for every potential user, curl and libcurl are
 * dual-licensed under the MPL and the MIT/X-derivate licenses.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the MPL or the MIT/X-derivate
 * licenses. You may pick one of these licenses.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id$
 *****************************************************************************/

/* This file is for lib internal stuff */

#include "setup.h"

#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif

#define PORT_FTP 21
#define PORT_TELNET 23
#define PORT_GOPHER 70
#define PORT_HTTP 80
#define PORT_HTTPS 443
#define PORT_DICT 2628
#define PORT_LDAP 389

#define DICT_MATCH "/MATCH:"
#define DICT_MATCH2 "/M:"
#define DICT_MATCH3 "/FIND:"
#define DICT_DEFINE "/DEFINE:"
#define DICT_DEFINE2 "/D:"
#define DICT_DEFINE3 "/LOOKUP:"

#define CURL_DEFAULT_USER "anonymous"
#define CURL_DEFAULT_PASSWORD "curl_by_daniel@haxx.se"

#include "cookie.h"
#include "formdata.h"
    
#ifdef USE_SSLEAY
/* SSLeay stuff usually in /usr/local/ssl/include */
#ifdef USE_OPENSSL
#include "openssl/rsa.h"
#include "openssl/crypto.h"
#include "openssl/x509.h"
#include "openssl/pem.h"
#include "openssl/ssl.h"
#include "openssl/err.h"
#else
#include "rsa.h"
#include "crypto.h"
#include "x509.h"
#include "pem.h"
#include "ssl.h"
#include "err.h"
#endif
#endif

#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif

#include "timeval.h"

#include <curl/curl.h>

/* Download buffer size, keep it fairly big for speed reasons */
#define BUFSIZE (1024*50)

/* Defaul upload buffer size, keep it smallish to get faster progress meter
   updates. This is just default, it is dynamic and adjusts to the upload
   speed. */
#define UPLOAD_BUFSIZE (1024*2)

/* Initial size of the buffer to store headers in, it'll be enlarged in case
   of need. */
#define HEADERSIZE 256

/* Just a convenience macro to get the larger value out of two given */
#ifndef MAX
#define MAX(x,y) ((x)>(y)?(x):(y))
#endif

/* Type of handle. All publicly returned 'handles' in the curl interface
   have a handle first in the struct that describes what kind of handle it
   is. Used to detect bad handle usage. */
typedef enum {
  STRUCT_NONE,
  STRUCT_OPEN,
  STRUCT_CONNECT,
  STRUCT_LAST
} Handle;

/* Connecting to a remote server using the curl interface is moving through
   a state machine, this type is used to store the current state */
typedef enum {
  CONN_NONE,  /* illegal state */
  CONN_INIT,  /* curl_connect() has been called */
  CONN_DO,    /* curl_do() has been called successfully */
  CONN_DONE,  /* curl_done() has been called successfully */
  CONN_ERROR, /* and error has occurred */
  CONN_LAST   /* illegal state */
} ConnState;

#ifdef KRB4
/* Types needed for krb4-ftp connections */
struct krb4buffer {
  void *data;
  size_t size;
  size_t index;
  int eof_flag;
};
enum protection_level { 
    prot_clear, 
    prot_safe, 
    prot_confidential, 
    prot_private 
};
#endif

/*
 * The connectdata struct contains all fields and variables that should be
 * unique for an entire connection.
 */
struct connectdata {
  /**** Fields set when inited and not modified again */

  /* To better see what kind of struct that is passed as input, *ALL* publicly
     returned handles MUST have this initial 'Handle'. */
  Handle handle; /* struct identifier */
  struct UrlData *data; /* link to the root CURL struct */

  /**** curl_connect() phase fields */
  ConnState state; /* for state dependent actions */

  long protocol; /* PROT_* flags concerning the protocol set */
#define PROT_MISSING (1<<0)
#define PROT_GOPHER  (1<<1)
#define PROT_HTTP    (1<<2)
#define PROT_HTTPS   (1<<3)
#define PROT_FTP     (1<<4)
#define PROT_TELNET  (1<<5)
#define PROT_DICT    (1<<6)
#define PROT_LDAP    (1<<7)
#define PROT_FILE    (1<<8)

#ifdef ENABLE_IPV6
  struct addrinfo *res;
#else
  char *hostent_buf; /* pointer to allocated memory for name info */
  struct hostent *hp;
  struct sockaddr_in serv_addr;
#endif
  char proto[64];  /* store the protocol string in this buffer */
  char gname[257]; /* store the hostname in this buffer */
  char *name;      /* host name pointer to fool around with */
  char *path;      /* allocated buffer to store the URL's path part in */
  char *ppath;
  long bytecount;
  struct timeval now; /* current time */

  long upload_bufsize; /* adjust as you see fit, never bigger than BUFSIZE
                          never smaller than UPLOAD_BUFSIZE */

  /* These two functions MUST be set by the curl_connect() function to be
     be protocol dependent */
  CURLcode (*curl_do)(struct connectdata *connect);
  CURLcode (*curl_done)(struct connectdata *connect);

  /* This function *MAY* be set to a protocol-dependent function that is run
   * after the connect() and everything is done, as a step in the connection.
   */ 
  CURLcode (*curl_connect)(struct connectdata *connect);

  /* This function *MAY* be set to a protocol-dependent function that is run
   * in the curl_close() function if protocol-specific cleanups are required.
   */ 
  CURLcode (*curl_close)(struct connectdata *connect);

  /**** curl_get() phase fields */

  /* READ stuff */
  int sockfd;		 /* socket to read from or -1 */
  int size;		 /* -1 if unknown at this point */
  bool getheader;	 /* TRUE if header parsing is wanted */
  long *bytecountp;	 /* return number of bytes read or NULL */
          
  /* WRITE stuff */
  int writesockfd;       /* socket to write to, it may very well be
                            the same we read from. -1 disables */
  long *writebytecountp; /* return number of bytes written or NULL */

#ifdef KRB4

  enum protection_level command_prot;
  enum protection_level data_prot;
  enum protection_level request_data_prot;

  size_t buffer_size;

  struct krb4buffer in_buffer, out_buffer;
  int sec_complete;
  void *app_data;

#endif
};

struct Progress {
  long lastshow; /* time() of the last displayed progress meter or NULL to
                    force redraw at next call */
  double size_dl;
  double size_ul;
  double downloaded;
  double uploaded;

  double current_speed; /* uses the currently fastest transfer */

  bool callback;  /* set when progress callback is used */
  int width; /* screen width at download start */
  int flags; /* see progress.h */
  double timespent;
  double dlspeed;
  double ulspeed;

  struct timeval start;
  struct timeval t_startsingle;
  /* various data stored for possible later report */
  double t_nslookup;
  double t_connect;
  double t_pretransfer;
  int httpcode;
  time_t filetime; /* If requested, this is might get set. It may be 0 if
                      the time was unretrievable */

#define CURR_TIME 5

  double speeder[ CURR_TIME ];
  int speeder_c;
};

/****************************************************************************
 * HTTP unique setup
 ***************************************************************************/
struct HTTP {
  struct FormData *sendit;
  int postsize;
  char *p_pragma;      /* Pragma: string */
  char *p_accept;      /* Accept: string */
  long readbytecount; 
  long writebytecount;

  /* For FORM posting */
  struct Form form;
  size_t (*storefread)(char *, size_t , size_t , FILE *);
  FILE *in;
};

/****************************************************************************
 * FTP unique setup
 ***************************************************************************/
struct FTP {
  long *bytecountp;
  char *user;    /* user name string */
  char *passwd;  /* password string */
  char *urlpath; /* the originally given path part of the URL */
  char *dir;     /* decoded directory */
  char *file;    /* decoded file */
};

typedef enum {
  HTTPREQ_NONE, /* first in list */
  HTTPREQ_GET,
  HTTPREQ_POST,
  HTTPREQ_POST_FORM, /* we make a difference internally */
  HTTPREQ_PUT,
  HTTPREQ_CUSTOM,
  HTTPREQ_LAST /* last in list */
} Curl_HttpReq;

/* This struct is for boolean settings that define how to behave during
   this session. */
struct Configbits {
  /* these four request types mirror the httpreq field */
  bool http_formpost;
  bool http_post;
  bool http_put;
  bool http_get;

  bool get_filetime;
  bool tunnel_thru_httpproxy;
  bool ftp_append;
  bool ftp_ascii;
  bool ftp_list_only;
  bool ftp_use_port;
  bool hide_progress;
  bool http_fail_on_error;
  bool http_follow_location;
  bool http_include_header;
  bool http_set_referer;
  bool http_auto_referer; /* set "correct" referer when following location: */
  bool httpproxy;
  bool mute;
  bool no_body;
  bool proxy_user_passwd;
  bool set_port;
  bool set_range;
  bool upload;
  bool use_netrc;
  bool user_passwd;
  bool verbose;
  bool this_is_a_follow; /* this is a followed Location: request */
  bool krb4; /* kerberos4 connection requested */
  bool proxystringalloc; /* the http proxy string is malloc()'ed */
  bool rangestringalloc; /* the range string is malloc()'ed */
  bool urlstringalloc;   /* the URL string is malloc()'ed */
};

/* What type of interface that intiated this struct */
typedef enum {
  CURLI_NONE,
  CURLI_EASY,
  CURLI_NORMAL,
  CURLI_LAST
} CurlInterface;

/* struct for data related to SSL and SSL connections */
struct ssldata {
  bool use;              /* use ssl encrypted communications TRUE/FALSE */
  long version;          /* what version the client wants to use */
  long certverifyresult; /* result from the certificate verification */
  long verifypeer;       /* set TRUE if this is desired */
  char *CApath;          /* DOES NOT WORK ON WINDOWS */
  char *CAfile;          /* cerficate to verify peer against */
#ifdef USE_SSLEAY
  /* these ones requires specific SSL-types */
  SSL_CTX* ctx;
  SSL*     handle;
  X509*    server_cert;
#endif /* USE_SSLEAY */
};

/*
 * As of April 11, 2000 we're now trying to split up the urldata struct in
 * three different parts:
 *
 * (Global)
 * 1 - No matter how many hosts and requests that are being performed, this
 *     goes for all of them.
 *
 * (Session)
 * 2 - Host and protocol-specific. No matter if we do several transfers to and
 *     from this host, these variables stay the same.
 *
 * (Request)
 * 3 - Request-specific. Variables that are of interest for this particular
 *     transfer being made right now.
 *
 */

struct UrlData {
  Handle handle; /* struct identifier */
  CurlInterface interf; /* created by WHAT interface? */

  /*************** Global - specific items  ************/
  FILE *err;    /* the stderr writes goes here */
  char *errorbuffer; /* store failure messages in here */

  /*************** Session - specific items ************/
  char *proxy; /* if proxy, set it here, set CONF_PROXY to use this */
  char *proxyuserpwd;  /* Proxy <user:password>, if used */
  long proxyport; /* If non-zero, use this port number by default. If the
                     proxy string features a ":[port]" that one will override
                     this. */

  
  long header_size;  /* size of read header(s) in bytes */
  long request_size; /* the amount of bytes sent in the request(s) */

  /*************** Request - specific items ************/

  union {
    struct HTTP *http;
    struct HTTP *gopher; /* alias, just for the sake of being more readable */
    struct HTTP *https;  /* alias, just for the sake of being more readable */
    struct FTP *ftp;
#if 0 /* no need for special ones for these: */
    struct TELNET *telnet;
    struct FILE *file;
    struct LDAP *ldap;
    struct DICT *dict;
#endif
    void *generic;
  } proto;

  FILE *out;    /* the fetched file goes here */
  FILE *in;     /* the uploaded file is read from here */
  FILE *writeheader; /* write the header to this is non-NULL */
  char *url;   /* what to get */
  char *freethis; /* if non-NULL, an allocated string for the URL */
  char *hostname; /* hostname to connect, as parsed from url */
  long port; /* which port to use (if non-protocol bind) set
                CONF_PORT to use this */
  unsigned short remote_port; /* what remote port to connect to, not the proxy
				 port! */
  struct Configbits bits; /* new-style (v7) flag data */

  char *userpwd;  /* <user:password>, if used */
  char *range; /* range, if used. See README for detailed specification on
                  this syntax. */

  /* stuff related to HTTP */

  long followlocation;
  long maxredirs; /* maximum no. of http(s) redirects to follow */
  char *referer;
  bool free_referer; /* set TRUE if 'referer' points to a string we
                        allocated */
  char *useragent;   /* User-Agent string */
  char *postfields; /* if POST, set the fields' values here */
  long postfieldsize; /* if POST, this might have a size to use instead of
                         strlen(), and then the data *may* be binary (contain
                         zero bytes) */

  /* stuff related to FTP */
  char *ftpport; /* port to send with the PORT command */

  /* general things */
  char *device;  /* Interface to use */

  /* function that stores the output:*/
  curl_write_callback fwrite;

  /* function that reads the input:*/
  curl_read_callback fread;

  /* function that wants progress information */
  curl_progress_callback fprogress;
  void *progress_client; /* pointer to pass to the progress callback */

  /* function to call instead of the internal for password */
  curl_passwd_callback fpasswd;
  void *passwd_client; /* pointer to pass to the passwd callback */

  long timeout; /* in seconds, 0 means no timeout */
  long infilesize; /* size of file to upload, -1 means unknown */

  long maxdownload; /* in bytes, the maximum amount of data to fetch, 0
                       means unlimited */
  
  /* fields only set and used within _urlget() */
  int firstsocket;     /* the main socket to use */
  int secondarysocket; /* for i.e ftp transfers */

  char buffer[BUFSIZE+1]; /* buffer with size BUFSIZE */

  double current_speed;  /* the ProgressShow() funcion sets this */

  long low_speed_limit; /* bytes/second */
  long low_speed_time;  /* number of seconds */

  int resume_from;    /* continue [ftp] transfer from here */

  char *cookie;       /* HTTP cookie string to send */

  char *newurl; /* This can only be set if a Location: was in the
		   document headers */

  struct curl_slist *headers; /* linked list of extra headers */
  struct HttpPost *httppost;  /* linked list of POST data */

  char *cert; /* PEM-formatted certificate */
  char *cert_passwd; /* plain text certificate password */

  struct CookieInfo *cookies;

  struct ssldata ssl; /* this is for ssl-stuff */

  long crlf;
  struct curl_slist *quote;     /* before the transfer */
  struct curl_slist *postquote; /* after the transfer */

  TimeCond timecondition; /* kind of comparison */
  time_t timevalue;       /* what time to compare with */

  Curl_HttpReq httpreq; /* what kind of HTTP request (if any) is this */

  char *customrequest; /* http/ftp request to use */

  char *headerbuff; /* allocated buffer to store headers in */
  int headersize;   /* size of the allocation */

#if 0
  /* this was removed in libcurl 7.4 */
  char *writeinfo;  /* if non-NULL describes what to output on a successful
                       completion */
#endif

  struct Progress progress; /* for all the progress meter data */

#define MAX_CURL_USER_LENGTH 128
#define MAX_CURL_PASSWORD_LENGTH 128

  char *auth_host; /* if set, this is the allocated string to the host name
                    * to which to send the authorization data to, and no other
                    * host (which location-following otherwise could lead to)
                    */

  /* buffers to store authentication data in */
  char user[MAX_CURL_USER_LENGTH];
  char passwd[MAX_CURL_PASSWORD_LENGTH];
  char proxyuser[MAX_CURL_USER_LENGTH];
  char proxypasswd[MAX_CURL_PASSWORD_LENGTH];

  /**** Dynamicly allocated strings, may need to be freed on return ****/
  char *ptr_proxyuserpwd; /* free later if not NULL! */
  char *ptr_uagent; /* free later if not NULL! */
  char *ptr_userpwd; /* free later if not NULL! */
  char *ptr_rangeline; /* free later if not NULL! */
  char *ptr_ref; /* free later if not NULL! */
  char *ptr_cookie; /* free later if not NULL! */
  char *ptr_host; /* free later if not NULL */

  char *krb4_level; /* what security level */
#ifdef KRB4
  FILE *cmdchannel;
#endif

  struct timeval keeps_speed; /* this should be request-specific */
};

#define LIBCURL_NAME "libcurl"
#define LIBCURL_ID LIBCURL_NAME " " LIBCURL_VERSION " " SSL_ID


#endif