1 #ifndef PROJECT_H_INCLUDED
2 #define PROJECT_H_INCLUDED
4 #define PROJECT_H_VERSION "$Id: project.h,v 1.170 2011/07/17 13:34:36 fabiankeil Exp $"
5 /*********************************************************************
7 * File : $Source: /cvsroot/ijbswa/current/project.h,v $
9 * Purpose : Defines data structures which are widely used in the
10 * project. Does not define any variables or functions
11 * (though it does declare some macros).
13 * Copyright : Written by and Copyright (C) 2001-2010 the
14 * Privoxy team. http://www.privoxy.org/
16 * Based on the Internet Junkbuster originally written
17 * by and Copyright (C) 1997 Anonymous Coders and
18 * Junkbusters Corporation. http://www.junkbusters.com
20 * This program is free software; you can redistribute it
21 * and/or modify it under the terms of the GNU General
22 * Public License as published by the Free Software
23 * Foundation; either version 2 of the License, or (at
24 * your option) any later version.
26 * This program is distributed in the hope that it will
27 * be useful, but WITHOUT ANY WARRANTY; without even the
28 * implied warranty of MERCHANTABILITY or FITNESS FOR A
29 * PARTICULAR PURPOSE. See the GNU General Public
30 * License for more details.
32 * The GNU General Public License should be included with
33 * this file. If not, you can view it at
34 * http://www.gnu.org/copyleft/gpl.html
35 * or write to the Free Software Foundation, Inc., 59
36 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
38 *********************************************************************/
41 /* Declare struct FILE for vars and funcs. */
44 /* Need time_t for file_list */
46 /* Needed for pcre choice */
49 /* Need for struct sockaddr_storage */
53 # include <sys/socket.h>
56 # include <winsock2.h>
57 # include <ws2tcpip.h>
58 typedef unsigned short in_port_t;
64 * Include appropriate regular expression libraries.
65 * Note that pcrs and pcre (native) are needed for cgi
66 * and are included anyway.
72 # ifdef PCRE_H_IN_SUBDIR
73 # include <pcre/pcre.h>
86 # include "pcreposix.h"
88 # ifdef PCRE_H_IN_SUBDIR
89 # include <pcre/pcreposix.h>
91 # include <pcreposix.h>
97 #endif /* def AMIGA */
101 * I don't want to have to #include all this just for the declaration
102 * of SOCKET. However, it looks like we have to...
117 typedef SOCKET jb_socket;
119 #define JB_INVALID_SOCKET INVALID_SOCKET
121 #else /* ndef _WIN32 */
124 * The type used by sockets. On UNIX it's an int. Microsoft decided to
125 * make it an unsigned.
127 typedef int jb_socket;
130 * The error value used for variables of type jb_socket. On UNIX this
131 * is -1, however Microsoft decided to make socket handles unsigned, so
132 * they use a different value.
135 #define JB_INVALID_SOCKET (-1)
137 #endif /* ndef _WIN32 */
141 * A standard error code. This should be JB_ERR_OK or one of the JB_ERR_xxx
146 #define JB_ERR_OK 0 /**< Success, no error */
147 #define JB_ERR_MEMORY 1 /**< Out of memory */
148 #define JB_ERR_CGI_PARAMS 2 /**< Missing or corrupt CGI parameters */
149 #define JB_ERR_FILE 3 /**< Error opening, reading or writing a file */
150 #define JB_ERR_PARSE 4 /**< Error parsing file */
151 #define JB_ERR_MODIFIED 5 /**< File has been modified outside of the
152 CGI actions editor. */
153 #define JB_ERR_COMPRESS 6 /**< Error on decompression */
156 * This macro is used to free a pointer that may be NULL.
157 * It also sets the variable to NULL after it's been freed.
158 * The paramater should be a simple variable without side effects.
160 #define freez(X) { if(X) { free((void*)X); X = NULL ; } }
164 * Fix a problem with Solaris. There should be no effect on other
167 * Solaris's isspace() is a macro which uses it's argument directly
168 * as an array index. Therefore we need to make sure that high-bit
169 * characters generate +ve values, and ideally we also want to make
170 * the argument match the declared parameter type of "int".
172 * Note: Remember to #include <ctype.h> if you use these macros.
174 #define ijb_toupper(__X) toupper((int)(unsigned char)(__X))
175 #define ijb_tolower(__X) tolower((int)(unsigned char)(__X))
176 #define ijb_isspace(__X) isspace((int)(unsigned char)(__X))
179 * Use for statically allocated buffers if you have no other choice.
180 * Remember to check the length of what you write into the buffer
181 * - we don't want any buffer overflows!
183 #define BUFFER_SIZE 5000
186 * Max length of CGI parameters (arbitrary limit).
188 #define CGI_PARAM_LEN_MAX 500U
191 * Buffer size for capturing struct hostent data in the
192 * gethostby(name|addr)_r library calls. Since we don't
193 * loop over gethostbyname_r, the buffer must be sufficient
194 * to accommodate multiple IN A RRs, as used in DNS round robin
195 * load balancing. W3C's wwwlib uses 1K, so that should be
196 * good enough for us, too.
199 * XXX: Temporary doubled, for some configurations
200 * 1K is still too small and we didn't get the
201 * real fix ready for inclusion.
203 #define HOSTENT_BUFFER_SIZE 2048
206 * Do not use. Originally this was so that you can
207 * say "while (FOREVER) { ...do something... }".
208 * However, this gives a warning with some compilers (e.g. VC++).
209 * Instead, use "for (;;) { ...do something... }".
214 * Default TCP/IP address to listen on, as a string.
215 * Set to "127.0.0.1:8118".
217 #define HADDR_DEFAULT "127.0.0.1:8118"
220 /* Forward def for struct client_state */
221 struct configuration_spec;
225 * Entry in a linked list of strings.
230 * The string pointer. It must point to a dynamically malloc()ed
231 * string or be NULL for the list functions to work. In the latter
232 * case, just be careful next time you iterate through the list in
237 /** Next entry in the linked list, or NULL if no more. */
238 struct list_entry *next;
242 * A header for a linked list of strings.
246 /** First entry in the list, or NULL if the list is empty. */
247 struct list_entry *first;
249 /** Last entry in the list, or NULL if the list is empty. */
250 struct list_entry *last;
255 * An entry in a map. This is a name=value pair.
259 /** The key for the map. */
261 /** The value associated with that key. */
263 /** The next map entry, or NULL if none. */
264 struct map_entry *next;
268 * A map from a string to another string.
269 * This is used for the paramaters passed in a HTTP GET request, and
270 * to store the exports when the CGI interface is filling in a template.
274 /** The first map entry, or NULL if the map is empty. */
275 struct map_entry *first;
276 /** The last map entry, or NULL if the map is empty. */
277 struct map_entry *last;
282 * A HTTP request. This includes the method (GET, POST) and
285 * This is also used whenever we want to match a URL against a
286 * URL pattern. This always contains the URL to match, and never
287 * a URL pattern. (See struct url_spec).
291 char *cmd; /**< Whole command line: method, URL, Version */
292 char *ocmd; /**< Backup of original cmd for CLF logging */
293 char *gpc; /**< HTTP method: GET, POST, ... */
294 char *url; /**< The URL */
295 char *ver; /**< Protocol version */
296 int status; /**< HTTP Status */
298 char *host; /**< Host part of URL */
299 int port; /**< Port of URL or 80 (default) */
300 char *path; /**< Path of URL */
301 char *hostport; /**< host[:port] */
302 int ssl; /**< Flag if protocol is https */
304 char *host_ip_addr_str; /**< String with dotted decimal representation
305 of host's IP. NULL before connect_to() */
307 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
308 char *dbuffer; /**< Buffer with '\0'-delimited domain name. */
309 char **dvec; /**< List of pointers to the strings in dbuffer. */
310 int dcount; /**< How many parts to this domain? (length of dvec) */
311 #endif /* ndef FEATURE_EXTENDED_HOST_PATTERNS */
315 * Reasons for generating a http_response instead of delivering
316 * the requested resource. Mostly ordered the way they are checked
336 * Response generated by CGI, blocker, or error handler
340 enum crunch_reason crunch_reason; /**< Why the response was generated in the first place. */
341 char *status; /**< HTTP status (string). */
342 struct list headers[1]; /**< List of header lines. */
343 char *head; /**< Formatted http response head. */
344 size_t head_length; /**< Length of http response head. */
345 char *body; /**< HTTP document body. */
346 size_t content_length; /**< Length of body, REQUIRED if binary body. */
347 int is_static; /**< Nonzero if the content will never change and
348 should be cached by the browser (e.g. images). */
352 * A URL or a tag pattern.
356 /** The string which was parsed to produce this url_spec.
357 Used for debugging or display only. */
360 #ifdef FEATURE_EXTENDED_HOST_PATTERNS
361 regex_t *host_regex;/**< Regex for host matching */
363 char *dbuffer; /**< Buffer with '\0'-delimited domain name, or NULL to match all hosts. */
364 char **dvec; /**< List of pointers to the strings in dbuffer. */
365 int dcount; /**< How many parts to this domain? (length of dvec) */
366 int unanchored; /**< Bitmap - flags are ANCHOR_LEFT and ANCHOR_RIGHT. */
367 #endif /* defined FEATURE_EXTENDED_HOST_PATTERNS */
369 char *port_list; /**< List of acceptable ports, or NULL to match all ports */
371 regex_t *preg; /**< Regex for matching path part */
372 regex_t *tag_regex; /**< Regex for matching tags */
376 * If you declare a static url_spec, this is the value to initialize it to zero.
378 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
379 #define URL_SPEC_INITIALIZER { NULL, NULL, NULL, 0, 0, NULL, NULL, NULL }
381 #define URL_SPEC_INITIALIZER { NULL, NULL, NULL, NULL, NULL }
382 #endif /* def FEATURE_EXTENDED_HOST_PATTERNS */
385 * Constant for host part matching in URLs. If set, indicates that the start of
386 * the pattern must match the start of the URL. E.g. this is not set for the
387 * pattern ".example.com", so that it will match both "example.com" and
388 * "www.example.com". It is set for the pattern "example.com", which makes it
389 * match "example.com" only, not "www.example.com".
391 #define ANCHOR_LEFT 1
394 * Constant for host part matching in URLs. If set, indicates that the end of
395 * the pattern must match the end of the URL. E.g. this is not set for the
396 * pattern "ad.", so that it will match any host called "ad", irrespective
397 * of how many subdomains are in the fully-qualified domain name.
399 #define ANCHOR_RIGHT 2
403 * An I/O buffer. Holds a string which can be appended to, and can have data
404 * removed from the beginning.
408 char *buf; /**< Start of buffer */
409 char *cur; /**< Start of relevant data */
410 char *eod; /**< End of relevant data */
411 size_t size; /**< Size as malloc()ed */
416 * Return the number of bytes in the I/O buffer associated with the passed
417 * client_state pointer.
420 #define IOB_PEEK(CSP) ((CSP->iob->cur > CSP->iob->eod) ? (CSP->iob->eod - CSP->iob->cur) : 0)
424 * Remove any data in the I/O buffer associated with the passed
425 * client_state pointer.
427 #define IOB_RESET(CSP) if(CSP->iob->buf) free(CSP->iob->buf); memset(CSP->iob, '\0', sizeof(CSP->iob));
429 /* Bits for csp->content_type bitmask: */
430 #define CT_TEXT 0x0001U /**< Suitable for pcrs filtering. */
431 #define CT_GIF 0x0002U /**< Suitable for GIF filtering. */
432 #define CT_TABOO 0x0004U /**< DO NOT filter, irrespective of other flags. */
434 /* Although these are not, strictly speaking, content types
435 * (they are content encodings), it is simple to handle them
438 #define CT_GZIP 0x0010U /**< gzip-compressed data. */
439 #define CT_DEFLATE 0x0020U /**< zlib-compressed data. */
442 * Flag to signal that the server declared the content type,
443 * so we can differentiate between unknown and undeclared
446 #define CT_DECLARED 0x0040U
449 * The mask which includes all actions.
451 #define ACTION_MASK_ALL (~0UL)
454 * The most compatible set of actions - i.e. none.
456 #define ACTION_MOST_COMPATIBLE 0x00000000UL
458 /** Action bitmap: Block the request. */
459 #define ACTION_BLOCK 0x00000001UL
460 /** Action bitmap: Deanimate if it's a GIF. */
461 #define ACTION_DEANIMATE 0x00000002UL
462 /** Action bitmap: Downgrade HTTP/1.1 to 1.0. */
463 #define ACTION_DOWNGRADE 0x00000004UL
464 /** Action bitmap: Fast redirects. */
465 #define ACTION_FAST_REDIRECTS 0x00000008UL
466 /** Action bitmap: Remove or add "X-Forwarded-For" header. */
467 #define ACTION_CHANGE_X_FORWARDED_FOR 0x00000010UL
468 /** Action bitmap: Hide "From" header. */
469 #define ACTION_HIDE_FROM 0x00000020UL
470 /** Action bitmap: Hide "Referer" header. (sic - follow HTTP, not English). */
471 #define ACTION_HIDE_REFERER 0x00000040UL
472 /** Action bitmap: Hide "User-Agent" and similar headers. */
473 #define ACTION_HIDE_USER_AGENT 0x00000080UL
474 /** Action bitmap: This is an image. */
475 #define ACTION_IMAGE 0x00000100UL
476 /** Action bitmap: Sets the image blocker. */
477 #define ACTION_IMAGE_BLOCKER 0x00000200UL
478 /** Action bitmap: Prevent compression. */
479 #define ACTION_NO_COMPRESSION 0x00000400UL
480 /** Action bitmap: Change cookies to session only cookies. */
481 #define ACTION_NO_COOKIE_KEEP 0x00000800UL
482 /** Action bitmap: Block rending cookies. */
483 #define ACTION_NO_COOKIE_READ 0x00001000UL
484 /** Action bitmap: Block setting cookies. */
485 #define ACTION_NO_COOKIE_SET 0x00002000UL
486 /** Action bitmap: Override the forward settings in the config file */
487 #define ACTION_FORWARD_OVERRIDE 0x00004000UL
488 /** Action bitmap: Block as empty document */
489 #define ACTION_HANDLE_AS_EMPTY_DOCUMENT 0x00008000UL
490 /** Action bitmap: Limit CONNECT requests to safe ports. */
491 #define ACTION_LIMIT_CONNECT 0x00010000UL
492 /** Action bitmap: Redirect request. */
493 #define ACTION_REDIRECT 0x00020000UL
494 /** Action bitmap: Crunch or modify "if-modified-since" header. */
495 #define ACTION_HIDE_IF_MODIFIED_SINCE 0x00040000UL
496 /** Action bitmap: Overwrite Content-Type header. */
497 #define ACTION_CONTENT_TYPE_OVERWRITE 0x00080000UL
498 /** Action bitmap: Crunch specified server header. */
499 #define ACTION_CRUNCH_SERVER_HEADER 0x00100000UL
500 /** Action bitmap: Crunch specified client header */
501 #define ACTION_CRUNCH_CLIENT_HEADER 0x00200000UL
502 /** Action bitmap: Enable text mode by force */
503 #define ACTION_FORCE_TEXT_MODE 0x00400000UL
504 /** Action bitmap: Enable text mode by force */
505 #define ACTION_CRUNCH_IF_NONE_MATCH 0x00800000UL
506 /** Action bitmap: Enable content-disposition crunching */
507 #define ACTION_HIDE_CONTENT_DISPOSITION 0x01000000UL
508 /** Action bitmap: Replace or block Last-Modified header */
509 #define ACTION_OVERWRITE_LAST_MODIFIED 0x02000000UL
510 /** Action bitmap: Replace or block Accept-Language header */
511 #define ACTION_HIDE_ACCEPT_LANGUAGE 0x04000000UL
514 /** Action string index: How to deanimate GIFs */
515 #define ACTION_STRING_DEANIMATE 0
516 /** Action string index: Replacement for "From:" header */
517 #define ACTION_STRING_FROM 1
518 /** Action string index: How to block images */
519 #define ACTION_STRING_IMAGE_BLOCKER 2
520 /** Action string index: Replacement for "Referer:" header */
521 #define ACTION_STRING_REFERER 3
522 /** Action string index: Replacement for "User-Agent:" header */
523 #define ACTION_STRING_USER_AGENT 4
524 /** Action string index: Legal CONNECT ports. */
525 #define ACTION_STRING_LIMIT_CONNECT 5
526 /** Action string index: Server headers containing this pattern are crunched*/
527 #define ACTION_STRING_SERVER_HEADER 6
528 /** Action string index: Client headers containing this pattern are crunched*/
529 #define ACTION_STRING_CLIENT_HEADER 7
530 /** Action string index: Replacement for the "Accept-Language:" header*/
531 #define ACTION_STRING_LANGUAGE 8
532 /** Action string index: Replacement for the "Content-Type:" header*/
533 #define ACTION_STRING_CONTENT_TYPE 9
534 /** Action string index: Replacement for the "content-disposition:" header*/
535 #define ACTION_STRING_CONTENT_DISPOSITION 10
536 /** Action string index: Replacement for the "If-Modified-Since:" header*/
537 #define ACTION_STRING_IF_MODIFIED_SINCE 11
538 /** Action string index: Replacement for the "Last-Modified:" header. */
539 #define ACTION_STRING_LAST_MODIFIED 12
540 /** Action string index: Redirect URL */
541 #define ACTION_STRING_REDIRECT 13
542 /** Action string index: Decode before redirect? */
543 #define ACTION_STRING_FAST_REDIRECTS 14
544 /** Action string index: Overriding forward rule. */
545 #define ACTION_STRING_FORWARD_OVERRIDE 15
546 /** Action string index: Reason for the block. */
547 #define ACTION_STRING_BLOCK 16
548 /** Action string index: what to do with the "X-Forwarded-For" header. */
549 #define ACTION_STRING_CHANGE_X_FORWARDED_FOR 17
550 /** Number of string actions. */
551 #define ACTION_STRING_COUNT 18
554 /* To make the ugly hack in sed easier to understand */
555 #define CHECK_EVERY_HEADER_REMAINING 0
558 /** Index into current_action_spec::multi[] for headers to add. */
559 #define ACTION_MULTI_ADD_HEADER 0
560 /** Index into current_action_spec::multi[] for content filters to apply. */
561 #define ACTION_MULTI_FILTER 1
562 /** Index into current_action_spec::multi[] for server-header filters to apply. */
563 #define ACTION_MULTI_SERVER_HEADER_FILTER 2
564 /** Index into current_action_spec::multi[] for client-header filters to apply. */
565 #define ACTION_MULTI_CLIENT_HEADER_FILTER 3
566 /** Index into current_action_spec::multi[] for client-header tags to apply. */
567 #define ACTION_MULTI_CLIENT_HEADER_TAGGER 4
568 /** Index into current_action_spec::multi[] for server-header tags to apply. */
569 #define ACTION_MULTI_SERVER_HEADER_TAGGER 5
570 /** Number of multi-string actions. */
571 #define ACTION_MULTI_COUNT 6
575 * This structure contains a list of actions to apply to a URL.
576 * It only contains positive instructions - no "-" options.
577 * It is not used to store the actions list itself, only for
578 * url_actions() to return the current values.
580 struct current_action_spec
582 /** Actions to apply. A bit set to "1" means perform the action. */
586 * Paramaters for those actions that require them.
587 * Each entry is valid if & only if the corresponding entry in "flags" is
590 char * string[ACTION_STRING_COUNT];
592 /** Lists of strings for multi-string actions. */
593 struct list multi[ACTION_MULTI_COUNT][1];
598 * This structure contains a set of changes to actions.
599 * It can contain both positive and negative instructions.
600 * It is used to store an entry in the actions list.
604 unsigned long mask; /**< Actions to keep. A bit set to "0" means remove action. */
605 unsigned long add; /**< Actions to add. A bit set to "1" means add action. */
608 * Paramaters for those actions that require them.
609 * Each entry is valid if & only if the corresponding entry in "flags" is
612 char * string[ACTION_STRING_COUNT];
614 /** Lists of strings to remove, for multi-string actions. */
615 struct list multi_remove[ACTION_MULTI_COUNT][1];
617 /** If nonzero, remove *all* strings from the multi-string action. */
618 int multi_remove_all[ACTION_MULTI_COUNT];
620 /** Lists of strings to add, for multi-string actions. */
621 struct list multi_add[ACTION_MULTI_COUNT][1];
626 * This structure is used to store action files.
628 * It contains an URL or tag pattern, and the changes to
629 * the actions. It's a linked list and should only be
630 * free'd through unload_actions_file() unless there's
631 * only a single entry.
635 struct url_spec url[1]; /**< The URL or tag pattern. */
637 struct action_spec *action; /**< Action settings that might be shared with
638 the list entry before or after the current
639 one and can't be free'd willy nilly. */
641 struct url_actions *next; /**< Next action section in file, or NULL. */
646 * Structure to hold the server socket and the information
647 * required to make sure we only reuse the connection if
648 * the host and forwarding settings are the same.
650 struct reusable_connection
654 time_t timestamp; /* XXX: rename? */
657 time_t response_received;
660 * Number of seconds after which this
661 * connection will no longer be reused.
663 unsigned int keep_alive_timeout;
676 * Flags for use in csp->flags
680 * Flag for csp->flags: Set if this client is processing data.
681 * Cleared when the thread associated with this structure dies.
683 #define CSP_FLAG_ACTIVE 0x01U
686 * Flag for csp->flags: Set if the server's reply is in "chunked"
689 #define CSP_FLAG_CHUNKED 0x02U
692 * Flag for csp->flags: Set if this request was enforced, although it would
693 * normally have been blocked.
695 #define CSP_FLAG_FORCED 0x04U
698 * Flag for csp->flags: Set if any modification to the body was done.
700 #define CSP_FLAG_MODIFIED 0x08U
703 * Flag for csp->flags: Set if request was blocked.
705 #define CSP_FLAG_REJECTED 0x10U
708 * Flag for csp->flags: Set if we are toggled on (FEATURE_TOGGLE).
710 #define CSP_FLAG_TOGGLED_ON 0x20U
713 * Flag for csp->flags: Set if we answered the request ourselve.
715 #define CSP_FLAG_CRUNCHED 0x40U
718 * Flag for csp->flags: Set if an acceptable Connection header
719 * has already been set by the client.
721 #define CSP_FLAG_CLIENT_CONNECTION_HEADER_SET 0x00000040U
724 * Flag for csp->flags: Set if an acceptable Connection header
725 * has already been set by the server.
727 #define CSP_FLAG_SERVER_CONNECTION_HEADER_SET 0x00000080U
730 * Flag for csp->flags: Signals header parsers whether they
731 * are parsing server or client headers.
733 #define CSP_FLAG_CLIENT_HEADER_PARSING_DONE 0x00000100U
736 * Flag for csp->flags: Set if adding the Host: header
739 #define CSP_FLAG_HOST_HEADER_IS_SET 0x00000200U
742 * Flag for csp->flags: Set if filtering is disabled by X-Filter: No
743 * XXX: As we now have tags we might as well ditch this.
745 #define CSP_FLAG_NO_FILTERING 0x00000400U
748 * Flag for csp->flags: Set the client IP has appended to
749 * an already existing X-Forwarded-For header in which case
750 * no new header has to be generated.
752 #define CSP_FLAG_X_FORWARDED_FOR_APPENDED 0x00000800U
755 * Flag for csp->flags: Set if the server wants to keep
756 * the connection alive.
758 #define CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE 0x00001000U
760 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
762 * Flag for csp->flags: Set if the server specified the
765 #define CSP_FLAG_SERVER_CONTENT_LENGTH_SET 0x00002000U
768 * Flag for csp->flags: Set if we know the content length,
769 * either because the server set it, or we figured it out
772 #define CSP_FLAG_CONTENT_LENGTH_SET 0x00004000U
775 * Flag for csp->flags: Set if the client wants to keep
776 * the connection alive.
778 #define CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE 0x00008000U
781 * Flag for csp->flags: Set if we think we got the whole
782 * client request and shouldn't read any additional data
783 * coming from the client until the current request has
786 #define CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ 0x00010000U
789 * Flag for csp->flags: Set if the server promised us to
790 * keep the connection open for a known number of seconds.
792 #define CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET 0x00020000U
794 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
797 * Flag for csp->flags: Set if we think we can't reuse
800 #define CSP_FLAG_SERVER_SOCKET_TAINTED 0x00040000U
803 * Flag for csp->flags: Set if the Proxy-Connection header
804 * is among the server headers.
806 #define CSP_FLAG_SERVER_PROXY_CONNECTION_HEADER_SET 0x00080000U
809 * Flag for csp->flags: Set if the client reused its connection.
811 #define CSP_FLAG_REUSED_CLIENT_CONNECTION 0x00100000U
814 * Flag for csp->flags: Set if the supports deflate compression.
816 #define CSP_FLAG_CLIENT_SUPPORTS_DEFLATE 0x00200000U
819 * Flag for csp->flags: Set if the content has been deflated by Privoxy
821 #define CSP_FLAG_BUFFERED_CONTENT_DEFLATED 0x00400000U
825 * Flags for use in return codes of child processes
829 * Flag for process return code: Set if exiting porcess has been toggled
830 * during its lifetime.
832 #define RC_FLAG_TOGGLED 0x10
835 * Flag for process return code: Set if exiting porcess has blocked its
838 #define RC_FLAG_BLOCKED 0x20
841 * Maximum number of actions/filter files. This limit is arbitrary - it's just used
844 #define MAX_AF_FILES 10
847 * Maximum number of sockets to listen to. This limit is arbitrary - it's just used
850 #define MAX_LISTENING_SOCKETS 10
853 * The state of a Privoxy processing thread.
857 /** The proxy's configuration */
858 struct configuration_spec * config;
860 /** The actions to perform on the current request */
861 struct current_action_spec action[1];
863 /** socket to talk to client (web browser) */
866 /** current connection to the server (may go through a proxy) */
867 struct reusable_connection server_connection;
869 /** Multi-purpose flag container, see CSP_FLAG_* above */
872 /** Client PC's IP address, as reported by the accept() function.
876 /** Client PC's TCP address, as reported by the accept() function.
878 struct sockaddr_storage tcp_addr;
880 /** Client PC's IP address, as reported by the accept() function.
882 unsigned long ip_addr_long;
883 #endif /* def HAVE_RFC2553 */
885 /** The URL that was requested */
886 struct http_request http[1];
889 * The final forwarding settings.
890 * XXX: Currently this is only used for forward-override,
891 * so we can free the space in sweep.
893 struct forward_spec * fwd;
895 /** An I/O buffer used for buffering data read from the network */
898 /** List of all headers for this request */
899 struct list headers[1];
901 /** List of all tags that apply to this request */
904 /** MIME-Type key, see CT_* above */
905 unsigned int content_type;
907 /** Actions files associated with this client */
908 struct file_list *actions_list[MAX_AF_FILES];
910 /** pcrs job files. */
911 struct file_list *rlist[MAX_AF_FILES];
913 /** Length after content modification. */
914 unsigned long long content_length;
916 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
917 /* XXX: is this the right location? */
919 /** Expected length of content after which we
920 * should stop reading from the server socket.
922 unsigned long long expected_content_length;
924 /** Expected length of content after which we
925 * should stop reading from the client socket.
927 unsigned long long expected_client_content_length;
928 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
933 struct file_list *tlist;
935 #endif /* def FEATURE_TRUST */
938 * Failure reason to embedded in the CGI error page,
939 * or NULL. Currently only used for socks errors.
945 * List of client states so the main thread can keep
946 * track of them and garbage collect their resources.
950 struct client_states *next;
951 struct client_state csp;
955 * A function to add a header
957 typedef jb_err (*add_header_func_ptr)(struct client_state *);
960 * A function to process a header
962 typedef jb_err (*parser_func_ptr )(struct client_state *, char **);
966 * List of available CGI functions.
968 struct cgi_dispatcher
970 /** The URL of the CGI, relative to the CGI root. */
971 const char * const name;
973 /** The handler function for the CGI */
974 jb_err (* const handler)(struct client_state *csp, struct http_response *rsp, const struct map *parameters);
976 /** The description of the CGI, to appear on the main menu, or NULL to hide it. */
977 const char * const description;
979 /** A flag that indicates whether unintentional calls to this CGI can cause damage */
985 * A data file used by Privoxy. Kept in a linked list.
990 * This is a pointer to the data structures associated with the file.
991 * Read-only once the structure has been created.
996 * The unloader function.
997 * Normally NULL. When we are finished with file (i.e. when we have
998 * loaded a new one), set to a pointer to an unloader function.
999 * Unloader will be called by sweep() (called from main loop) when
1000 * all clients using this file are done. This prevents threading
1003 void (*unloader)(void *);
1006 * Used internally by sweep(). Do not access from elsewhere.
1011 * File last-modified time, so we can check if file has been changed.
1012 * Read-only once the structure has been created.
1014 time_t lastmodified;
1017 * The full filename.
1022 * Pointer to next entry in the linked list of all "file_list"s.
1023 * This linked list is so that sweep() can navigate it.
1024 * Since sweep() can remove items from the list, we must be careful
1025 * to only access this value from main thread (when we know sweep
1026 * won't be running).
1028 struct file_list *next;
1032 #ifdef FEATURE_TRUST
1035 * The format of a trust file when loaded into memory.
1039 struct url_spec url[1]; /**< The URL pattern */
1040 int reject; /**< FIXME: Please document this! */
1041 struct block_spec *next; /**< Next entry in linked list */
1045 * Arbitrary limit for the number of trusted referrers.
1047 #define MAX_TRUSTED_REFERRERS 512
1049 #endif /* def FEATURE_TRUST */
1051 enum forwarder_type {
1052 /**< Don't use a SOCKS server */
1054 /**< original SOCKS 4 protocol */
1056 /**< SOCKS 4A, DNS resolution is done by the SOCKS server */
1058 /**< SOCKS 5 with hostnames, DNS resolution is done by the SOCKS server */
1063 * How to forward a connection to a parent proxy.
1067 /** URL pattern that this forward_spec is for. */
1068 struct url_spec url[1];
1070 /** Connection type. Must be SOCKS_NONE, SOCKS_4, SOCKS_4A or SOCKS_5. */
1071 enum forwarder_type type;
1073 /** SOCKS server hostname. Only valid if "type" is SOCKS_4 or SOCKS_4A. */
1076 /** SOCKS server port. */
1079 /** Parent HTTP proxy hostname, or NULL for none. */
1082 /** Parent HTTP proxy port. */
1085 /** Next entry in the linked list. */
1086 struct forward_spec *next;
1091 * Initializer for a static struct forward_spec.
1093 #define FORWARD_SPEC_INITIALIZER { { URL_SPEC_INITIALIZER }, 0, NULL, 0, NULL, 0, NULL }
1095 /* Supported filter types */
1098 FT_CONTENT_FILTER = 0,
1099 FT_CLIENT_HEADER_FILTER = 1,
1100 FT_SERVER_HEADER_FILTER = 2,
1101 FT_CLIENT_HEADER_TAGGER = 3,
1102 FT_SERVER_HEADER_TAGGER = 4,
1104 #define MAX_FILTER_TYPES 5
1107 * This struct represents one filter (one block) from
1108 * the re_filterfile. If there is more than one filter
1109 * in the file, the file will be represented by a
1110 * chained list of re_filterfile specs.
1112 struct re_filterfile_spec
1114 char *name; /**< Name from FILTER: statement in re_filterfile. */
1115 char *description; /**< Description from FILTER: statement in re_filterfile. */
1116 struct list patterns[1]; /**< The patterns from the re_filterfile. */
1117 pcrs_job *joblist; /**< The resulting compiled pcrs_jobs. */
1118 enum filter_type type; /**< Filter type (content, client-header, server-header). */
1119 int dynamic; /**< Set to one if the pattern might contain variables
1120 and has to be recompiled for every request. */
1121 struct re_filterfile_spec *next; /**< The pointer for chaining. */
1127 #define ACL_PERMIT 1 /**< Accept connection request */
1128 #define ACL_DENY 2 /**< Reject connection request */
1131 * An IP address pattern. Used to specify networks in the ACL.
1133 struct access_control_addr
1136 struct sockaddr_storage addr; /* <The TCP address in network order. */
1137 struct sockaddr_storage mask; /* <The TCP mask in network order. */
1139 unsigned long addr; /**< The IP address as an integer. */
1140 unsigned long mask; /**< The network mask as an integer. */
1141 unsigned long port; /**< The port number. */
1142 #endif /* HAVE_RFC2553 */
1146 * An access control list (ACL) entry.
1148 * This is a linked list.
1150 struct access_control_list
1152 struct access_control_addr src[1]; /**< Client IP address */
1153 struct access_control_addr dst[1]; /**< Website or parent proxy IP address */
1155 int wildcard_dst; /** < dst address is wildcard */
1158 short action; /**< ACL_PERMIT or ACL_DENY */
1159 struct access_control_list *next; /**< The next entry in the ACL. */
1162 #endif /* def FEATURE_ACL */
1165 /** Maximum number of loaders (actions, re_filter, ...) */
1169 /** configuration_spec::feature_flags: CGI actions editor. */
1170 #define RUNTIME_FEATURE_CGI_EDIT_ACTIONS 1U
1172 /** configuration_spec::feature_flags: Web-based toggle. */
1173 #define RUNTIME_FEATURE_CGI_TOGGLE 2U
1175 /** configuration_spec::feature_flags: HTTP-header-based toggle. */
1176 #define RUNTIME_FEATURE_HTTP_TOGGLE 4U
1178 /** configuration_spec::feature_flags: Split large forms to limit the number of GET arguments. */
1179 #define RUNTIME_FEATURE_SPLIT_LARGE_FORMS 8U
1181 /** configuration_spec::feature_flags: Check the host header for requests with host-less request lines. */
1182 #define RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS 16U
1184 /** configuration_spec::feature_flags: Don't allow to circumvent blocks with the force prefix. */
1185 #define RUNTIME_FEATURE_ENFORCE_BLOCKS 32U
1187 /** configuration_spec::feature_flags: Allow to block or redirect CGI requests. */
1188 #define RUNTIME_FEATURE_CGI_CRUNCHING 64U
1190 /** configuration_spec::feature_flags: Try to keep the connection to the server alive. */
1191 #define RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE 128U
1193 /** configuration_spec::feature_flags: Share outgoing connections between different client connections. */
1194 #define RUNTIME_FEATURE_CONNECTION_SHARING 256U
1196 /** configuration_spec::feature_flags: Pages blocked with +handle-as-empty-doc get a return status of 200 OK. */
1197 #define RUNTIME_FEATURE_EMPTY_DOC_RETURNS_OK 512U
1199 /** configuration_spec::feature_flags: Buffered content is sent compressed if the client supports it. */
1200 #define RUNTIME_FEATURE_COMPRESSION 1024U
1203 * Data loaded from the configuration file.
1205 * (Anomaly: toggle is still handled through a global, not this structure)
1207 struct configuration_spec
1212 /** Nonzero to enable multithreading. */
1216 * Bitmask of features that can be enabled/disabled through the config
1217 * file. Currently defined bits:
1219 * - RUNTIME_FEATURE_CGI_EDIT_ACTIONS
1220 * - RUNTIME_FEATURE_CGI_TOGGLE
1221 * - RUNTIME_FEATURE_HTTP_TOGGLE
1222 * - RUNTIME_FEATURE_SPLIT_LARGE_FORMS
1223 * - RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS
1224 * - RUNTIME_FEATURE_ENFORCE_BLOCKS
1225 * - RUNTIME_FEATURE_CGI_CRUNCHING
1226 * - RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE
1227 * - RUNTIME_FEATURE_CONNECTION_SHARING
1228 * - RUNTIME_FEATURE_EMPTY_DOC_RETURNS_OK
1230 unsigned feature_flags;
1232 /** The log file name. */
1233 const char *logfile;
1235 /** The config file directory. */
1236 const char *confdir;
1238 /** The directory for customized CGI templates. */
1239 const char *templdir;
1241 /** The log file directory. */
1244 /** The full paths to the actions files. */
1245 const char *actions_file[MAX_AF_FILES];
1247 /** The short names of the actions files. */
1248 const char *actions_file_short[MAX_AF_FILES];
1250 /** The administrator's email address */
1251 char *admin_address;
1253 /** A URL with info on this proxy */
1254 char *proxy_info_url;
1256 /** URL to the user manual (on our website or local copy) */
1259 /** The file names of the pcre filter files. */
1260 const char *re_filterfile[MAX_AF_FILES];
1262 /** The short names of the pcre filter files. */
1263 const char *re_filterfile_short[MAX_AF_FILES];
1265 /** The hostname to show on CGI pages, or NULL to use the real one. */
1266 const char *hostname;
1268 /** IP addresses to bind to. Defaults to HADDR_DEFAULT == 127.0.0.1. */
1269 const char *haddr[MAX_LISTENING_SOCKETS];
1271 /** Ports to bind to. Defaults to HADDR_PORT == 8118. */
1272 int hport[MAX_LISTENING_SOCKETS];
1274 /** Size limit for IOB */
1275 size_t buffer_limit;
1277 #ifdef FEATURE_TRUST
1279 /** The file name of the trust file. */
1280 const char * trustfile;
1282 /** FIXME: DOCME: Document this. */
1283 struct list trust_info[1];
1285 /** FIXME: DOCME: Document this. */
1286 struct url_spec *trust_list[MAX_TRUSTED_REFERRERS];
1288 #endif /* def FEATURE_TRUST */
1292 /** The access control list (ACL). */
1293 struct access_control_list *acl;
1295 #endif /* def FEATURE_ACL */
1297 /** Information about parent proxies (forwarding). */
1298 struct forward_spec *forward;
1300 /** Number of retries in case a forwarded connection attempt fails */
1301 int forwarded_connect_retries;
1303 /** Maximum number of client connections. */
1304 int max_client_connections;
1306 /* Timeout when waiting on sockets for data to become available. */
1309 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1310 /* Maximum number of seconds after which an open connection will no longer be reused. */
1311 unsigned int keep_alive_timeout;
1313 /* Assumed server-side keep alive timeout if none is specified. */
1314 unsigned int default_server_timeout;
1317 #ifdef FEATURE_COMPRESSION
1318 int compression_level;
1321 /** All options from the config file, HTML-formatted. */
1324 /** The configuration file object. */
1325 struct file_list *config_file_list;
1327 /** List of loaders */
1328 int (*loaders[NLOADERS])(struct client_state *);
1330 /** Nonzero if we need to bind() to the new port. */
1334 /** Calculates the number of elements in an array, using sizeof. */
1335 #define SZ(X) (sizeof(X) / sizeof(*X))
1337 #ifdef FEATURE_FORCE_LOAD
1338 /** The force load URL prefix. */
1339 #define FORCE_PREFIX "/PRIVOXY-FORCE"
1340 #endif /* def FEATURE_FORCE_LOAD */
1342 #ifdef FEATURE_NO_GIFS
1343 /** The MIME type for images ("image/png" or "image/gif"). */
1344 #define BUILTIN_IMAGE_MIMETYPE "image/png"
1346 #define BUILTIN_IMAGE_MIMETYPE "image/gif"
1347 #endif /* def FEATURE_NO_GIFS */
1354 /** URL for the Privoxy home page. */
1355 #define HOME_PAGE_URL "http://www.privoxy.org/"
1357 /** URL for the Privoxy user manual. */
1358 #define USER_MANUAL_URL HOME_PAGE_URL VERSION "/user-manual/"
1360 /** Prefix for actions help links (append to USER_MANUAL_URL). */
1361 #define ACTIONS_HELP_PREFIX "actions-file.html#"
1363 /** Prefix for config option help links (append to USER_MANUAL_URL). */
1364 #define CONFIG_HELP_PREFIX "config.html#"
1367 * The "hosts" to intercept and display CGI pages.
1368 * First one is a hostname only, second one can specify host and path.
1371 * 1) Do not specify the http: prefix
1372 * 2) CGI_SITE_2_PATH must not end with /, one will be added automatically.
1373 * 3) CGI_SITE_2_PATH must start with /, unless it is the empty string.
1375 #define CGI_SITE_1_HOST "p.p"
1376 #define CGI_SITE_2_HOST "config.privoxy.org"
1377 #define CGI_SITE_2_PATH ""
1380 * The prefix for CGI pages. Written out in generated HTML.
1381 * INCLUDES the trailing slash.
1383 #define CGI_PREFIX "http://" CGI_SITE_2_HOST CGI_SITE_2_PATH "/"
1389 #endif /* ndef PROJECT_H_INCLUDED */