1 #ifndef PROJECT_H_INCLUDED
2 #define PROJECT_H_INCLUDED
4 #define PROJECT_H_VERSION "$Id: project.h,v 1.215 2016/05/22 12:43:07 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) 2001-2014 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...
113 typedef SOCKET jb_socket;
115 #define JB_INVALID_SOCKET INVALID_SOCKET
117 #else /* ndef _WIN32 */
120 * The type used by sockets. On UNIX it's an int. Microsoft decided to
121 * make it an unsigned.
123 typedef int jb_socket;
126 * The error value used for variables of type jb_socket. On UNIX this
127 * is -1, however Microsoft decided to make socket handles unsigned, so
128 * they use a different value.
131 #define JB_INVALID_SOCKET (-1)
133 #endif /* ndef _WIN32 */
137 * A standard error code. This should be JB_ERR_OK or one of the JB_ERR_xxx
142 JB_ERR_OK = 0, /**< Success, no error */
143 JB_ERR_MEMORY = 1, /**< Out of memory */
144 JB_ERR_CGI_PARAMS = 2, /**< Missing or corrupt CGI parameters */
145 JB_ERR_FILE = 3, /**< Error opening, reading or writing a file */
146 JB_ERR_PARSE = 4, /**< Error parsing file */
147 JB_ERR_MODIFIED = 5, /**< File has been modified outside of the
148 CGI actions editor. */
149 JB_ERR_COMPRESS = 6 /**< Error on decompression */
152 typedef enum privoxy_err jb_err;
155 * This macro is used to free a pointer that may be NULL.
156 * It also sets the variable to NULL after it's been freed.
157 * The paramater should be a simple variable without side effects.
159 #define freez(X) { if(X) { free((void*)X); X = NULL ; } }
163 * Macro definitions for platforms where isspace() and friends
164 * are macros that use their argument directly as an array index
165 * and thus better be positive. Supposedly that's the case on
166 * some unspecified Solaris versions.
167 * Note: Remember to #include <ctype.h> if you use these macros.
169 #define privoxy_isdigit(__X) isdigit((int)(unsigned char)(__X))
170 #define privoxy_isupper(__X) isupper((int)(unsigned char)(__X))
171 #define privoxy_toupper(__X) toupper((int)(unsigned char)(__X))
172 #define privoxy_tolower(__X) tolower((int)(unsigned char)(__X))
173 #define privoxy_isspace(__X) isspace((int)(unsigned char)(__X))
176 * Use for statically allocated buffers if you have no other choice.
177 * Remember to check the length of what you write into the buffer
178 * - we don't want any buffer overflows!
180 #define BUFFER_SIZE 5000
183 * Max length of CGI parameters (arbitrary limit).
185 #define CGI_PARAM_LEN_MAX 500U
188 * Buffer size for capturing struct hostent data in the
189 * gethostby(name|addr)_r library calls. Since we don't
190 * loop over gethostbyname_r, the buffer must be sufficient
191 * to accommodate multiple IN A RRs, as used in DNS round robin
192 * load balancing. W3C's wwwlib uses 1K, so that should be
193 * good enough for us, too.
196 * XXX: Temporary doubled, for some configurations
197 * 1K is still too small and we didn't get the
198 * real fix ready for inclusion.
200 #define HOSTENT_BUFFER_SIZE 2048
203 * Default TCP/IP address to listen on, as a string.
204 * Set to "127.0.0.1:8118".
206 #define HADDR_DEFAULT "127.0.0.1:8118"
209 /* Forward def for struct client_state */
210 struct configuration_spec;
214 * Entry in a linked list of strings.
219 * The string pointer. It must point to a dynamically malloc()ed
220 * string or be NULL for the list functions to work. In the latter
221 * case, just be careful next time you iterate through the list in
226 /** Next entry in the linked list, or NULL if no more. */
227 struct list_entry *next;
231 * A header for a linked list of strings.
235 /** First entry in the list, or NULL if the list is empty. */
236 struct list_entry *first;
238 /** Last entry in the list, or NULL if the list is empty. */
239 struct list_entry *last;
244 * An entry in a map. This is a name=value pair.
248 /** The key for the map. */
250 /** The value associated with that key. */
252 /** The next map entry, or NULL if none. */
253 struct map_entry *next;
257 * A map from a string to another string.
258 * This is used for the paramaters passed in a HTTP GET request, and
259 * to store the exports when the CGI interface is filling in a template.
263 /** The first map entry, or NULL if the map is empty. */
264 struct map_entry *first;
265 /** The last map entry, or NULL if the map is empty. */
266 struct map_entry *last;
271 * A HTTP request. This includes the method (GET, POST) and
274 * This is also used whenever we want to match a URL against a
275 * URL pattern. This always contains the URL to match, and never
276 * a URL pattern. (See struct url_spec).
280 char *cmd; /**< Whole command line: method, URL, Version */
281 char *ocmd; /**< Backup of original cmd for CLF logging */
282 char *gpc; /**< HTTP method: GET, POST, ... */
283 char *url; /**< The URL */
284 char *ver; /**< Protocol version */
285 int status; /**< HTTP Status */
287 char *host; /**< Host part of URL */
288 int port; /**< Port of URL or 80 (default) */
289 char *path; /**< Path of URL */
290 char *hostport; /**< host[:port] */
291 int ssl; /**< Flag if protocol is https */
293 char *host_ip_addr_str; /**< String with dotted decimal representation
294 of host's IP. NULL before connect_to() */
296 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
297 char *dbuffer; /**< Buffer with '\0'-delimited domain name. */
298 char **dvec; /**< List of pointers to the strings in dbuffer. */
299 int dcount; /**< How many parts to this domain? (length of dvec) */
300 #endif /* ndef FEATURE_EXTENDED_HOST_PATTERNS */
304 * Reasons for generating a http_response instead of delivering
305 * the requested resource. Mostly ordered the way they are checked
325 * Response generated by CGI, blocker, or error handler
329 char *status; /**< HTTP status (string). */
330 struct list headers[1]; /**< List of header lines. */
331 char *head; /**< Formatted http response head. */
332 size_t head_length; /**< Length of http response head. */
333 char *body; /**< HTTP document body. */
334 size_t content_length; /**< Length of body, REQUIRED if binary body. */
335 int is_static; /**< Nonzero if the content will never change and
336 should be cached by the browser (e.g. images). */
337 enum crunch_reason crunch_reason; /**< Why the response was generated in the first place. */
342 #ifdef FEATURE_EXTENDED_HOST_PATTERNS
343 regex_t *host_regex;/**< Regex for host matching */
345 char *dbuffer; /**< Buffer with '\0'-delimited domain name, or NULL to match all hosts. */
346 char **dvec; /**< List of pointers to the strings in dbuffer. */
347 int dcount; /**< How many parts to this domain? (length of dvec) */
348 int unanchored; /**< Bitmap - flags are ANCHOR_LEFT and ANCHOR_RIGHT. */
349 #endif /* defined FEATURE_EXTENDED_HOST_PATTERNS */
351 char *port_list; /**< List of acceptable ports, or NULL to match all ports */
353 regex_t *preg; /**< Regex for matching path part */
357 * A URL or a tag pattern.
361 /** The string which was parsed to produce this pattern_spec.
362 Used for debugging or display only. */
367 struct url_spec url_spec;
371 unsigned int flags; /**< Bitmap with various pattern properties. */
375 * Constant for host part matching in URLs. If set, indicates that the start of
376 * the pattern must match the start of the URL. E.g. this is not set for the
377 * pattern ".example.com", so that it will match both "example.com" and
378 * "www.example.com". It is set for the pattern "example.com", which makes it
379 * match "example.com" only, not "www.example.com".
381 #define ANCHOR_LEFT 1
384 * Constant for host part matching in URLs. If set, indicates that the end of
385 * the pattern must match the end of the URL. E.g. this is not set for the
386 * pattern "ad.", so that it will match any host called "ad", irrespective
387 * of how many subdomains are in the fully-qualified domain name.
389 #define ANCHOR_RIGHT 2
391 /** Pattern spec bitmap: It's an URL pattern. */
392 #define PATTERN_SPEC_URL_PATTERN 0x00000001UL
394 /** Pattern spec bitmap: It's a TAG pattern. */
395 #define PATTERN_SPEC_TAG_PATTERN 0x00000002UL
397 /** Pattern spec bitmap: It's a NO-REQUEST-TAG pattern. */
398 #define PATTERN_SPEC_NO_REQUEST_TAG_PATTERN 0x00000004UL
400 /** Pattern spec bitmap: It's a NO-RESPONSE-TAG pattern. */
401 #define PATTERN_SPEC_NO_RESPONSE_TAG_PATTERN 0x00000008UL
403 /** Pattern spec bitmap: It's a CLIENT-TAG pattern. */
404 #define PATTERN_SPEC_CLIENT_TAG_PATTERN 0x00000010UL
407 * An I/O buffer. Holds a string which can be appended to, and can have data
408 * removed from the beginning.
412 char *buf; /**< Start of buffer */
413 char *cur; /**< Start of relevant data */
414 char *eod; /**< End of relevant data */
415 size_t size; /**< Size as malloc()ed */
420 * Return the number of bytes in the I/O buffer associated with the passed
421 * I/O buffer. May be zero.
423 #define IOB_PEEK(IOB) ((IOB->cur > IOB->eod) ? (IOB->eod - IOB->cur) : 0)
426 /* Bits for csp->content_type bitmask: */
427 #define CT_TEXT 0x0001U /**< Suitable for pcrs filtering. */
428 #define CT_GIF 0x0002U /**< Suitable for GIF filtering. */
429 #define CT_TABOO 0x0004U /**< DO NOT filter, irrespective of other flags. */
431 /* Although these are not, strictly speaking, content types
432 * (they are content encodings), it is simple to handle them
435 #define CT_GZIP 0x0010U /**< gzip-compressed data. */
436 #define CT_DEFLATE 0x0020U /**< zlib-compressed data. */
439 * Flag to signal that the server declared the content type,
440 * so we can differentiate between unknown and undeclared
443 #define CT_DECLARED 0x0040U
446 * The mask which includes all actions.
448 #define ACTION_MASK_ALL (~0UL)
451 * The most compatible set of actions - i.e. none.
453 #define ACTION_MOST_COMPATIBLE 0x00000000UL
455 /** Action bitmap: Block the request. */
456 #define ACTION_BLOCK 0x00000001UL
457 /** Action bitmap: Deanimate if it's a GIF. */
458 #define ACTION_DEANIMATE 0x00000002UL
459 /** Action bitmap: Downgrade HTTP/1.1 to 1.0. */
460 #define ACTION_DOWNGRADE 0x00000004UL
461 /** Action bitmap: Fast redirects. */
462 #define ACTION_FAST_REDIRECTS 0x00000008UL
463 /** Action bitmap: Remove or add "X-Forwarded-For" header. */
464 #define ACTION_CHANGE_X_FORWARDED_FOR 0x00000010UL
465 /** Action bitmap: Hide "From" header. */
466 #define ACTION_HIDE_FROM 0x00000020UL
467 /** Action bitmap: Hide "Referer" header. (sic - follow HTTP, not English). */
468 #define ACTION_HIDE_REFERER 0x00000040UL
469 /** Action bitmap: Hide "User-Agent" and similar headers. */
470 #define ACTION_HIDE_USER_AGENT 0x00000080UL
471 /** Action bitmap: This is an image. */
472 #define ACTION_IMAGE 0x00000100UL
473 /** Action bitmap: Sets the image blocker. */
474 #define ACTION_IMAGE_BLOCKER 0x00000200UL
475 /** Action bitmap: Prevent compression. */
476 #define ACTION_NO_COMPRESSION 0x00000400UL
477 /** Action bitmap: Change cookies to session only cookies. */
478 #define ACTION_SESSION_COOKIES_ONLY 0x00000800UL
479 /** Action bitmap: Block cookies coming from the client. */
480 #define ACTION_CRUNCH_OUTGOING_COOKIES 0x00001000UL
481 /** Action bitmap: Block cookies coming from the server. */
482 #define ACTION_CRUNCH_INCOMING_COOKIES 0x00002000UL
483 /** Action bitmap: Override the forward settings in the config file */
484 #define ACTION_FORWARD_OVERRIDE 0x00004000UL
485 /** Action bitmap: Block as empty document */
486 #define ACTION_HANDLE_AS_EMPTY_DOCUMENT 0x00008000UL
487 /** Action bitmap: Limit CONNECT requests to safe ports. */
488 #define ACTION_LIMIT_CONNECT 0x00010000UL
489 /** Action bitmap: Redirect request. */
490 #define ACTION_REDIRECT 0x00020000UL
491 /** Action bitmap: Crunch or modify "if-modified-since" header. */
492 #define ACTION_HIDE_IF_MODIFIED_SINCE 0x00040000UL
493 /** Action bitmap: Overwrite Content-Type header. */
494 #define ACTION_CONTENT_TYPE_OVERWRITE 0x00080000UL
495 /** Action bitmap: Crunch specified server header. */
496 #define ACTION_CRUNCH_SERVER_HEADER 0x00100000UL
497 /** Action bitmap: Crunch specified client header */
498 #define ACTION_CRUNCH_CLIENT_HEADER 0x00200000UL
499 /** Action bitmap: Enable text mode by force */
500 #define ACTION_FORCE_TEXT_MODE 0x00400000UL
501 /** Action bitmap: Enable text mode by force */
502 #define ACTION_CRUNCH_IF_NONE_MATCH 0x00800000UL
503 /** Action bitmap: Enable content-disposition crunching */
504 #define ACTION_HIDE_CONTENT_DISPOSITION 0x01000000UL
505 /** Action bitmap: Replace or block Last-Modified header */
506 #define ACTION_OVERWRITE_LAST_MODIFIED 0x02000000UL
507 /** Action bitmap: Replace or block Accept-Language header */
508 #define ACTION_HIDE_ACCEPT_LANGUAGE 0x04000000UL
509 /** Action bitmap: Limit the cookie lifetime */
510 #define ACTION_LIMIT_COOKIE_LIFETIME 0x08000000UL
513 /** Action string index: How to deanimate GIFs */
514 #define ACTION_STRING_DEANIMATE 0
515 /** Action string index: Replacement for "From:" header */
516 #define ACTION_STRING_FROM 1
517 /** Action string index: How to block images */
518 #define ACTION_STRING_IMAGE_BLOCKER 2
519 /** Action string index: Replacement for "Referer:" header */
520 #define ACTION_STRING_REFERER 3
521 /** Action string index: Replacement for "User-Agent:" header */
522 #define ACTION_STRING_USER_AGENT 4
523 /** Action string index: Legal CONNECT ports. */
524 #define ACTION_STRING_LIMIT_CONNECT 5
525 /** Action string index: Server headers containing this pattern are crunched*/
526 #define ACTION_STRING_SERVER_HEADER 6
527 /** Action string index: Client headers containing this pattern are crunched*/
528 #define ACTION_STRING_CLIENT_HEADER 7
529 /** Action string index: Replacement for the "Accept-Language:" header*/
530 #define ACTION_STRING_LANGUAGE 8
531 /** Action string index: Replacement for the "Content-Type:" header*/
532 #define ACTION_STRING_CONTENT_TYPE 9
533 /** Action string index: Replacement for the "content-disposition:" header*/
534 #define ACTION_STRING_CONTENT_DISPOSITION 10
535 /** Action string index: Replacement for the "If-Modified-Since:" header*/
536 #define ACTION_STRING_IF_MODIFIED_SINCE 11
537 /** Action string index: Replacement for the "Last-Modified:" header. */
538 #define ACTION_STRING_LAST_MODIFIED 12
539 /** Action string index: Redirect URL */
540 #define ACTION_STRING_REDIRECT 13
541 /** Action string index: Decode before redirect? */
542 #define ACTION_STRING_FAST_REDIRECTS 14
543 /** Action string index: Overriding forward rule. */
544 #define ACTION_STRING_FORWARD_OVERRIDE 15
545 /** Action string index: Reason for the block. */
546 #define ACTION_STRING_BLOCK 16
547 /** Action string index: what to do with the "X-Forwarded-For" header. */
548 #define ACTION_STRING_CHANGE_X_FORWARDED_FOR 17
549 /** Action string index: how many minutes cookies should be valid. */
550 #define ACTION_STRING_LIMIT_COOKIE_LIFETIME 18
551 /** Number of string actions. */
552 #define ACTION_STRING_COUNT 19
555 /* To make the ugly hack in sed easier to understand */
556 #define CHECK_EVERY_HEADER_REMAINING 0
559 /** Index into current_action_spec::multi[] for headers to add. */
560 #define ACTION_MULTI_ADD_HEADER 0
561 /** Index into current_action_spec::multi[] for content filters to apply. */
562 #define ACTION_MULTI_FILTER 1
563 /** Index into current_action_spec::multi[] for server-header filters to apply. */
564 #define ACTION_MULTI_SERVER_HEADER_FILTER 2
565 /** Index into current_action_spec::multi[] for client-header filters to apply. */
566 #define ACTION_MULTI_CLIENT_HEADER_FILTER 3
567 /** Index into current_action_spec::multi[] for client-header tags to apply. */
568 #define ACTION_MULTI_CLIENT_HEADER_TAGGER 4
569 /** Index into current_action_spec::multi[] for server-header tags to apply. */
570 #define ACTION_MULTI_SERVER_HEADER_TAGGER 5
571 /** Number of multi-string actions. */
572 #define ACTION_MULTI_EXTERNAL_FILTER 6
573 /** Number of multi-string actions. */
574 #define ACTION_MULTI_COUNT 7
578 * This structure contains a list of actions to apply to a URL.
579 * It only contains positive instructions - no "-" options.
580 * It is not used to store the actions list itself, only for
581 * url_actions() to return the current values.
583 struct current_action_spec
585 /** Actions to apply. A bit set to "1" means perform the action. */
589 * Paramaters for those actions that require them.
590 * Each entry is valid if & only if the corresponding entry in "flags" is
593 char * string[ACTION_STRING_COUNT];
595 /** Lists of strings for multi-string actions. */
596 struct list multi[ACTION_MULTI_COUNT][1];
601 * This structure contains a set of changes to actions.
602 * It can contain both positive and negative instructions.
603 * It is used to store an entry in the actions list.
607 unsigned long mask; /**< Actions to keep. A bit set to "0" means remove action. */
608 unsigned long add; /**< Actions to add. A bit set to "1" means add action. */
611 * Parameters for those actions that require them.
612 * Each entry is valid if & only if the corresponding entry in "flags" is
615 char * string[ACTION_STRING_COUNT];
617 /** Lists of strings to remove, for multi-string actions. */
618 struct list multi_remove[ACTION_MULTI_COUNT][1];
620 /** If nonzero, remove *all* strings from the multi-string action. */
621 int multi_remove_all[ACTION_MULTI_COUNT];
623 /** Lists of strings to add, for multi-string actions. */
624 struct list multi_add[ACTION_MULTI_COUNT][1];
629 * This structure is used to store action files.
631 * It contains an URL or tag pattern, and the changes to
632 * the actions. It's a linked list and should only be
633 * free'd through unload_actions_file() unless there's
634 * only a single entry.
638 struct pattern_spec url[1]; /**< The URL or tag pattern. */
640 struct action_spec *action; /**< Action settings that might be shared with
641 the list entry before or after the current
642 one and can't be free'd willy nilly. */
644 struct url_actions *next; /**< Next action section in file, or NULL. */
647 enum forwarder_type {
648 /**< Don't use a SOCKS server, forward to a HTTP proxy directly */
650 /**< original SOCKS 4 protocol */
652 /**< SOCKS 4A, DNS resolution is done by the SOCKS server */
654 /**< SOCKS 5 with hostnames, DNS resolution is done by the SOCKS server */
656 /**< Like SOCKS5, but uses non-standard Tor extensions (currently only optimistic data) */
659 * Don't use a SOCKS server, forward to the specified webserver.
660 * The difference to SOCKS_NONE is that a request line without
667 * Structure to hold the server socket and the information
668 * required to make sure we only reuse the connection if
669 * the host and forwarding settings are the same.
671 struct reusable_connection
675 time_t timestamp; /* XXX: rename? */
678 time_t response_received;
681 * Number of seconds after which this
682 * connection will no longer be reused.
684 unsigned int keep_alive_timeout;
686 * Number of requests that were sent to this connection.
687 * This is currently only for debugging purposes.
689 unsigned int requests_sent_total;
693 enum forwarder_type forwarder_type;
702 * Flags for use in csp->flags
706 * Flag for csp->flags: Set if this client is processing data.
707 * Cleared when the thread associated with this structure dies.
709 #define CSP_FLAG_ACTIVE 0x01U
712 * Flag for csp->flags: Set if the server's reply is in "chunked"
715 #define CSP_FLAG_CHUNKED 0x02U
718 * Flag for csp->flags: Set if this request was enforced, although it would
719 * normally have been blocked.
721 #define CSP_FLAG_FORCED 0x04U
724 * Flag for csp->flags: Set if any modification to the body was done.
726 #define CSP_FLAG_MODIFIED 0x08U
729 * Flag for csp->flags: Set if request was blocked.
731 #define CSP_FLAG_REJECTED 0x10U
734 * Flag for csp->flags: Set if we are toggled on (FEATURE_TOGGLE).
736 #define CSP_FLAG_TOGGLED_ON 0x20U
739 * Flag for csp->flags: Set if an acceptable Connection header
740 * has already been set by the client.
742 #define CSP_FLAG_CLIENT_CONNECTION_HEADER_SET 0x00000040U
745 * Flag for csp->flags: Set if an acceptable Connection header
746 * has already been set by the server.
748 #define CSP_FLAG_SERVER_CONNECTION_HEADER_SET 0x00000080U
751 * Flag for csp->flags: Signals header parsers whether they
752 * are parsing server or client headers.
754 #define CSP_FLAG_CLIENT_HEADER_PARSING_DONE 0x00000100U
757 * Flag for csp->flags: Set if adding the Host: header
760 #define CSP_FLAG_HOST_HEADER_IS_SET 0x00000200U
763 * Flag for csp->flags: Set if filtering is disabled by X-Filter: No
764 * XXX: As we now have tags we might as well ditch this.
766 #define CSP_FLAG_NO_FILTERING 0x00000400U
769 * Flag for csp->flags: Set the client IP has appended to
770 * an already existing X-Forwarded-For header in which case
771 * no new header has to be generated.
773 #define CSP_FLAG_X_FORWARDED_FOR_APPENDED 0x00000800U
776 * Flag for csp->flags: Set if the server wants to keep
777 * the connection alive.
779 #define CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE 0x00001000U
782 * Flag for csp->flags: Set if the server specified the
785 #define CSP_FLAG_SERVER_CONTENT_LENGTH_SET 0x00002000U
788 * Flag for csp->flags: Set if we know the content length,
789 * either because the server set it, or we figured it out
792 #define CSP_FLAG_CONTENT_LENGTH_SET 0x00004000U
795 * Flag for csp->flags: Set if the client wants to keep
796 * the connection alive.
798 #define CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE 0x00008000U
801 * Flag for csp->flags: Set if we think we got the whole
802 * client request and shouldn't read any additional data
803 * coming from the client until the current request has
806 #define CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ 0x00010000U
809 * Flag for csp->flags: Set if the server promised us to
810 * keep the connection open for a known number of seconds.
812 #define CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET 0x00020000U
815 * Flag for csp->flags: Set if we think we can't reuse
816 * the server socket. XXX: It's also set after sabotaging
817 * pipelining attempts which is somewhat inconsistent with
820 #define CSP_FLAG_SERVER_SOCKET_TAINTED 0x00040000U
823 * Flag for csp->flags: Set if the Proxy-Connection header
824 * is among the server headers.
826 #define CSP_FLAG_SERVER_PROXY_CONNECTION_HEADER_SET 0x00080000U
829 * Flag for csp->flags: Set if the client reused its connection.
831 #define CSP_FLAG_REUSED_CLIENT_CONNECTION 0x00100000U
834 * Flag for csp->flags: Set if the supports deflate compression.
836 #define CSP_FLAG_CLIENT_SUPPORTS_DEFLATE 0x00200000U
839 * Flag for csp->flags: Set if the content has been deflated by Privoxy
841 #define CSP_FLAG_BUFFERED_CONTENT_DEFLATED 0x00400000U
844 * Flag for csp->flags: Set if we already read (parts of)
845 * a pipelined request in which case the client obviously
846 * isn't done talking.
848 #define CSP_FLAG_PIPELINED_REQUEST_WAITING 0x00800000U
851 * Flag for csp->flags: Set if the client body is chunk-encoded
853 #define CSP_FLAG_CHUNKED_CLIENT_BODY 0x01000000U
856 * Flag for csp->flags: Set if the client set the Expect header
858 #define CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION 0x02000000U
861 * Flag for csp->flags: Set if we answered the request ourselve.
863 #define CSP_FLAG_CRUNCHED 0x04000000U
867 * Flags for use in return codes of child processes
871 * Flag for process return code: Set if exiting process has been toggled
872 * during its lifetime.
874 #define RC_FLAG_TOGGLED 0x10
877 * Flag for process return code: Set if exiting process has blocked its
880 #define RC_FLAG_BLOCKED 0x20
883 * Maximum number of actions/filter files. This limit is arbitrary - it's just used
886 #define MAX_AF_FILES 30
889 * Maximum number of sockets to listen to. This limit is arbitrary - it's just used
892 #define MAX_LISTENING_SOCKETS 10
895 * The state of a Privoxy processing thread.
899 /** The proxy's configuration */
900 struct configuration_spec * config;
902 /** The actions to perform on the current request */
903 struct current_action_spec action[1];
905 /** socket to talk to client (web browser) */
908 /** Number of requests received on the client socket. */
909 unsigned int requests_received_total;
911 /** current connection to the server (may go through a proxy) */
912 struct reusable_connection server_connection;
914 /** Multi-purpose flag container, see CSP_FLAG_* above */
917 /** Client PC's IP address, as reported by the accept() function.
921 /** Client PC's TCP address, as reported by the accept() function.
923 struct sockaddr_storage tcp_addr;
925 /** Client PC's IP address, as reported by the accept() function.
927 unsigned long ip_addr_long;
928 #endif /* def HAVE_RFC2553 */
930 /** The host name and port (as a string of the form '<hostname>:<port>')
931 of the server socket to which the client connected. */
932 char *listen_addr_str;
934 /** The URL that was requested */
935 struct http_request http[1];
938 * The final forwarding settings.
939 * XXX: Currently this is only used for forward-override,
940 * so we can free the space in sweep.
942 struct forward_spec * fwd;
944 /** An I/O buffer used for buffering data read from the server */
945 /* XXX: should be renamed to server_iob */
948 /** An I/O buffer used for buffering data read from the client */
949 struct iob client_iob[1];
951 /** List of all headers for this request */
952 struct list headers[1];
954 /** List of all tags that apply to this request */
957 #ifdef FEATURE_CLIENT_TAGS
958 /** List of all tags that apply to this client (assigned based on address) */
959 struct list client_tags[1];
960 /** The address of the client the request (presumably) came from.
961 * Either the address returned by accept(), or the address provided
962 * with the X-Forwarded-For header, provided Privoxy has been configured
965 char *client_address;
968 /** MIME-Type key, see CT_* above */
969 unsigned int content_type;
971 /** Actions files associated with this client */
972 struct file_list *actions_list[MAX_AF_FILES];
974 /** pcrs job files. */
975 struct file_list *rlist[MAX_AF_FILES];
977 /** Length after content modification. */
978 unsigned long long content_length;
980 /* XXX: is this the right location? */
982 /** Expected length of content after which we
983 * should stop reading from the server socket.
985 unsigned long long expected_content_length;
987 /** Expected length of content after which we
988 * should stop reading from the client socket.
990 unsigned long long expected_client_content_length;
995 struct file_list *tlist;
997 #endif /* def FEATURE_TRUST */
1000 * Failure reason to embedded in the CGI error page,
1001 * or NULL. Currently only used for socks errors.
1003 char *error_message;
1007 * List of client states so the main thread can keep
1008 * track of them and garbage collect their resources.
1010 struct client_states
1012 struct client_states *next;
1013 struct client_state csp;
1017 * A function to add a header
1019 typedef jb_err (*add_header_func_ptr)(struct client_state *);
1022 * A function to process a header
1024 typedef jb_err (*parser_func_ptr )(struct client_state *, char **);
1028 * List of available CGI functions.
1030 struct cgi_dispatcher
1032 /** The URL of the CGI, relative to the CGI root. */
1033 const char * const name;
1035 /** The handler function for the CGI */
1036 jb_err (* const handler)(struct client_state *csp, struct http_response *rsp, const struct map *parameters);
1038 /** The description of the CGI, to appear on the main menu, or NULL to hide it. */
1039 const char * const description;
1041 /** A flag that indicates whether unintentional calls to this CGI can cause damage */
1047 * A data file used by Privoxy. Kept in a linked list.
1052 * This is a pointer to the data structures associated with the file.
1053 * Read-only once the structure has been created.
1058 * The unloader function.
1059 * Normally NULL. When we are finished with file (i.e. when we have
1060 * loaded a new one), set to a pointer to an unloader function.
1061 * Unloader will be called by sweep() (called from main loop) when
1062 * all clients using this file are done. This prevents threading
1065 void (*unloader)(void *);
1068 * Used internally by sweep(). Do not access from elsewhere.
1073 * File last-modified time, so we can check if file has been changed.
1074 * Read-only once the structure has been created.
1076 time_t lastmodified;
1079 * The full filename.
1084 * Pointer to next entry in the linked list of all "file_list"s.
1085 * This linked list is so that sweep() can navigate it.
1086 * Since sweep() can remove items from the list, we must be careful
1087 * to only access this value from main thread (when we know sweep
1088 * won't be running).
1090 struct file_list *next;
1094 #ifdef FEATURE_TRUST
1097 * The format of a trust file when loaded into memory.
1101 struct pattern_spec url[1]; /**< The URL pattern */
1102 int reject; /**< FIXME: Please document this! */
1103 struct block_spec *next; /**< Next entry in linked list */
1107 * Arbitrary limit for the number of trusted referrers.
1109 #define MAX_TRUSTED_REFERRERS 512
1111 #endif /* def FEATURE_TRUST */
1114 * How to forward a connection to a parent proxy.
1118 /** URL pattern that this forward_spec is for. */
1119 struct pattern_spec url[1];
1121 /** Connection type. Must be SOCKS_NONE, SOCKS_4, SOCKS_4A or SOCKS_5. */
1122 enum forwarder_type type;
1124 /** SOCKS server hostname. Only valid if "type" is SOCKS_4 or SOCKS_4A. */
1127 /** SOCKS server port. */
1130 /** Parent HTTP proxy hostname, or NULL for none. */
1133 /** Parent HTTP proxy port. */
1136 /** Next entry in the linked list. */
1137 struct forward_spec *next;
1141 /* Supported filter types */
1144 FT_CONTENT_FILTER = 0,
1145 FT_CLIENT_HEADER_FILTER = 1,
1146 FT_SERVER_HEADER_FILTER = 2,
1147 FT_CLIENT_HEADER_TAGGER = 3,
1148 FT_SERVER_HEADER_TAGGER = 4,
1149 #ifdef FEATURE_EXTERNAL_FILTERS
1150 FT_EXTERNAL_CONTENT_FILTER = 5,
1152 FT_INVALID_FILTER = 42,
1155 #ifdef FEATURE_EXTERNAL_FILTERS
1156 #define MAX_FILTER_TYPES 6
1158 #define MAX_FILTER_TYPES 5
1162 * This struct represents one filter (one block) from
1163 * the re_filterfile. If there is more than one filter
1164 * in the file, the file will be represented by a
1165 * chained list of re_filterfile specs.
1167 struct re_filterfile_spec
1169 char *name; /**< Name from FILTER: statement in re_filterfile. */
1170 char *description; /**< Description from FILTER: statement in re_filterfile. */
1171 struct list patterns[1]; /**< The patterns from the re_filterfile. */
1172 pcrs_job *joblist; /**< The resulting compiled pcrs_jobs. */
1173 enum filter_type type; /**< Filter type (content, client-header, server-header). */
1174 int dynamic; /**< Set to one if the pattern might contain variables
1175 and has to be recompiled for every request. */
1176 struct re_filterfile_spec *next; /**< The pointer for chaining. */
1182 #define ACL_PERMIT 1 /**< Accept connection request */
1183 #define ACL_DENY 2 /**< Reject connection request */
1186 * An IP address pattern. Used to specify networks in the ACL.
1188 struct access_control_addr
1191 struct sockaddr_storage addr; /* <The TCP address in network order. */
1192 struct sockaddr_storage mask; /* <The TCP mask in network order. */
1194 unsigned long addr; /**< The IP address as an integer. */
1195 unsigned long mask; /**< The network mask as an integer. */
1196 unsigned long port; /**< The port number. */
1197 #endif /* HAVE_RFC2553 */
1201 * An access control list (ACL) entry.
1203 * This is a linked list.
1205 struct access_control_list
1207 struct access_control_addr src[1]; /**< Client IP address */
1208 struct access_control_addr dst[1]; /**< Website or parent proxy IP address */
1210 int wildcard_dst; /** < dst address is wildcard */
1213 short action; /**< ACL_PERMIT or ACL_DENY */
1214 struct access_control_list *next; /**< The next entry in the ACL. */
1217 #endif /* def FEATURE_ACL */
1220 /** Maximum number of loaders (actions, re_filter, ...) */
1224 * This struct represents a client-spcific-tag and it's description
1226 struct client_tag_spec
1228 char *name; /**< Name from "client-specific-tag bla" directive */
1229 char *description; /**< Description from "client-specific-tag-description " directive */
1230 struct client_tag_spec *next; /**< The pointer for chaining. */
1233 /** configuration_spec::feature_flags: CGI actions editor. */
1234 #define RUNTIME_FEATURE_CGI_EDIT_ACTIONS 1U
1236 /** configuration_spec::feature_flags: Web-based toggle. */
1237 #define RUNTIME_FEATURE_CGI_TOGGLE 2U
1239 /** configuration_spec::feature_flags: HTTP-header-based toggle. */
1240 #define RUNTIME_FEATURE_HTTP_TOGGLE 4U
1242 /** configuration_spec::feature_flags: Split large forms to limit the number of GET arguments. */
1243 #define RUNTIME_FEATURE_SPLIT_LARGE_FORMS 8U
1245 /** configuration_spec::feature_flags: Check the host header for requests with host-less request lines. */
1246 #define RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS 16U
1248 /** configuration_spec::feature_flags: Don't allow to circumvent blocks with the force prefix. */
1249 #define RUNTIME_FEATURE_ENFORCE_BLOCKS 32U
1251 /** configuration_spec::feature_flags: Allow to block or redirect CGI requests. */
1252 #define RUNTIME_FEATURE_CGI_CRUNCHING 64U
1254 /** configuration_spec::feature_flags: Try to keep the connection to the server alive. */
1255 #define RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE 128U
1257 /** configuration_spec::feature_flags: Share outgoing connections between different client connections. */
1258 #define RUNTIME_FEATURE_CONNECTION_SHARING 256U
1260 /** configuration_spec::feature_flags: Pages blocked with +handle-as-empty-doc get a return status of 200 OK. */
1261 #define RUNTIME_FEATURE_EMPTY_DOC_RETURNS_OK 512U
1263 /** configuration_spec::feature_flags: Buffered content is sent compressed if the client supports it. */
1264 #define RUNTIME_FEATURE_COMPRESSION 1024U
1266 /** configuration_spec::feature_flags: Pipelined requests are served instead of being discarded. */
1267 #define RUNTIME_FEATURE_TOLERATE_PIPELINING 2048U
1269 /** configuration_spec::feature_flags: Proxy authentication headers are forwarded instead of removed. */
1270 #define RUNTIME_FEATURE_FORWARD_PROXY_AUTHENTICATION_HEADERS 4096U
1273 * Data loaded from the configuration file.
1275 * (Anomaly: toggle is still handled through a global, not this structure)
1277 struct configuration_spec
1282 /** Nonzero to enable multithreading. */
1285 /** Bitmask of features that can be controlled through the config file. */
1286 unsigned feature_flags;
1288 /** The log file name. */
1289 const char *logfile;
1291 /** The config file directory. */
1292 const char *confdir;
1294 /** The directory for customized CGI templates. */
1295 const char *templdir;
1297 #ifdef FEATURE_EXTERNAL_FILTERS
1298 /** The template used to create temporary files. */
1299 const char *temporary_directory;
1302 /** The log file directory. */
1305 /** The full paths to the actions files. */
1306 const char *actions_file[MAX_AF_FILES];
1308 /** The short names of the actions files. */
1309 const char *actions_file_short[MAX_AF_FILES];
1311 /** The administrator's email address */
1312 char *admin_address;
1314 /** A URL with info on this proxy */
1315 char *proxy_info_url;
1317 /** URL to the user manual (on our website or local copy) */
1320 /** The file names of the pcre filter files. */
1321 const char *re_filterfile[MAX_AF_FILES];
1323 /** The short names of the pcre filter files. */
1324 const char *re_filterfile_short[MAX_AF_FILES];
1326 /**< List of ordered client header names. */
1327 struct list ordered_client_headers[1];
1329 /** The hostname to show on CGI pages, or NULL to use the real one. */
1330 const char *hostname;
1332 /** IP addresses to bind to. Defaults to HADDR_DEFAULT == 127.0.0.1. */
1333 const char *haddr[MAX_LISTENING_SOCKETS];
1335 /** Ports to bind to. Defaults to HADDR_PORT == 8118. */
1336 int hport[MAX_LISTENING_SOCKETS];
1338 /** Size limit for IOB */
1339 size_t buffer_limit;
1341 #ifdef FEATURE_TRUST
1343 /** The file name of the trust file. */
1344 const char * trustfile;
1346 /** FIXME: DOCME: Document this. */
1347 struct list trust_info[1];
1349 /** FIXME: DOCME: Document this. */
1350 struct pattern_spec *trust_list[MAX_TRUSTED_REFERRERS];
1352 #endif /* def FEATURE_TRUST */
1354 #ifdef FEATURE_CLIENT_TAGS
1355 struct client_tag_spec client_tags[1];
1357 /* Maximum number of seconds a temporarily enabled tag stays enabled. */
1358 unsigned int client_tag_lifetime;
1359 #endif /* def FEATURE_CLIENT_TAGS */
1360 int trust_x_forwarded_for;
1364 /** The access control list (ACL). */
1365 struct access_control_list *acl;
1367 #endif /* def FEATURE_ACL */
1369 /** Information about parent proxies (forwarding). */
1370 struct forward_spec *forward;
1372 /** Number of retries in case a forwarded connection attempt fails */
1373 int forwarded_connect_retries;
1375 /** Maximum number of client connections. */
1376 int max_client_connections;
1378 /* Timeout when waiting on sockets for data to become available. */
1381 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1382 /* Maximum number of seconds after which an open connection will no longer be reused. */
1383 unsigned int keep_alive_timeout;
1385 /* Assumed server-side keep alive timeout if none is specified. */
1386 unsigned int default_server_timeout;
1389 #ifdef FEATURE_COMPRESSION
1390 int compression_level;
1393 /** All options from the config file, HTML-formatted. */
1396 /** The configuration file object. */
1397 struct file_list *config_file_list;
1399 /** List of loaders */
1400 int (*loaders[NLOADERS])(struct client_state *);
1402 /** Nonzero if we need to bind() to the new port. */
1406 /** Calculates the number of elements in an array, using sizeof. */
1407 #define SZ(X) (sizeof(X) / sizeof(*X))
1409 /** The force load URL prefix. Not behind an ifdef because
1410 * it's always used for the show-status page. */
1411 #define FORCE_PREFIX "/PRIVOXY-FORCE"
1413 #ifdef FEATURE_NO_GIFS
1414 /** The MIME type for images ("image/png" or "image/gif"). */
1415 #define BUILTIN_IMAGE_MIMETYPE "image/png"
1417 #define BUILTIN_IMAGE_MIMETYPE "image/gif"
1418 #endif /* def FEATURE_NO_GIFS */
1425 /** URL for the Privoxy home page. */
1426 #define HOME_PAGE_URL "https://www.privoxy.org/"
1428 /** URL for the Privoxy user manual. */
1429 #define USER_MANUAL_URL HOME_PAGE_URL VERSION "/user-manual/"
1431 /** Prefix for actions help links (append to USER_MANUAL_URL). */
1432 #define ACTIONS_HELP_PREFIX "actions-file.html#"
1434 /** Prefix for config option help links (append to USER_MANUAL_URL). */
1435 #define CONFIG_HELP_PREFIX "config.html#"
1438 * The "hosts" to intercept and display CGI pages.
1439 * First one is a hostname only, second one can specify host and path.
1442 * 1) Do not specify the http: prefix
1443 * 2) CGI_SITE_2_PATH must not end with /, one will be added automatically.
1444 * 3) CGI_SITE_2_PATH must start with /, unless it is the empty string.
1446 #define CGI_SITE_1_HOST "p.p"
1447 #define CGI_SITE_2_HOST "config.privoxy.org"
1448 #define CGI_SITE_2_PATH ""
1451 * The prefix for CGI pages. Written out in generated HTML.
1452 * INCLUDES the trailing slash.
1454 #define CGI_PREFIX "http://" CGI_SITE_2_HOST CGI_SITE_2_PATH "/"
1456 #endif /* ndef PROJECT_H_INCLUDED */