1 #ifndef PROJECT_H_INCLUDED
2 #define PROJECT_H_INCLUDED
3 /*********************************************************************
5 * File : $Source: /cvsroot/ijbswa/current/project.h,v $
7 * Purpose : Defines data structures which are widely used in the
8 * project. Does not define any variables or functions
9 * (though it does declare some macros).
11 * Copyright : Written by and Copyright (C) 2001-2014 the
12 * Privoxy team. http://www.privoxy.org/
14 * Based on the Internet Junkbuster originally written
15 * by and Copyright (C) 1997 Anonymous Coders and
16 * Junkbusters Corporation. http://www.junkbusters.com
18 * This program is free software; you can redistribute it
19 * and/or modify it under the terms of the GNU General
20 * Public License as published by the Free Software
21 * Foundation; either version 2 of the License, or (at
22 * your option) any later version.
24 * This program is distributed in the hope that it will
25 * be useful, but WITHOUT ANY WARRANTY; without even the
26 * implied warranty of MERCHANTABILITY or FITNESS FOR A
27 * PARTICULAR PURPOSE. See the GNU General Public
28 * License for more details.
30 * The GNU General Public License should be included with
31 * this file. If not, you can view it at
32 * http://www.gnu.org/copyleft/gpl.html
33 * or write to the Free Software Foundation, Inc., 59
34 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 *********************************************************************/
39 /* Declare struct FILE for vars and funcs. */
42 /* Need time_t for file_list */
44 /* Needed for pcre choice */
47 /* Need for struct sockaddr_storage */
51 # include <sys/socket.h>
54 # include <ws2tcpip.h>
55 typedef unsigned short in_port_t;
61 * Include appropriate regular expression libraries.
62 * Note that pcrs and pcre (native) are needed for cgi
63 * and are included anyway.
69 # ifdef PCRE_H_IN_SUBDIR
70 # include <pcre/pcre.h>
83 # include "pcreposix.h"
85 # ifdef PCRE_H_IN_SUBDIR
86 # include <pcre/pcreposix.h>
88 # include <pcreposix.h>
94 * I don't want to have to #include all this just for the declaration
95 * of SOCKET. However, it looks like we have to...
106 typedef SOCKET jb_socket;
108 #define JB_INVALID_SOCKET INVALID_SOCKET
110 #else /* ndef _WIN32 */
113 * The type used by sockets. On UNIX it's an int. Microsoft decided to
114 * make it an unsigned.
116 typedef int jb_socket;
119 * The error value used for variables of type jb_socket. On UNIX this
120 * is -1, however Microsoft decided to make socket handles unsigned, so
121 * they use a different value.
124 #define JB_INVALID_SOCKET (-1)
126 #endif /* ndef _WIN32 */
130 * A standard error code. This should be JB_ERR_OK or one of the JB_ERR_xxx
135 JB_ERR_OK = 0, /**< Success, no error */
136 JB_ERR_MEMORY = 1, /**< Out of memory */
137 JB_ERR_CGI_PARAMS = 2, /**< Missing or corrupt CGI parameters */
138 JB_ERR_FILE = 3, /**< Error opening, reading or writing a file */
139 JB_ERR_PARSE = 4, /**< Error parsing file */
140 JB_ERR_MODIFIED = 5, /**< File has been modified outside of the
141 CGI actions editor. */
142 JB_ERR_COMPRESS = 6 /**< Error on decompression */
145 typedef enum privoxy_err jb_err;
148 * This macro is used to free a pointer that may be NULL.
149 * It also sets the variable to NULL after it's been freed.
150 * The paramater should be a simple variable without side effects.
152 #define freez(X) { if(X) { free((void*)X); X = NULL ; } }
156 * Macro definitions for platforms where isspace() and friends
157 * are macros that use their argument directly as an array index
158 * and thus better be positive. Supposedly that's the case on
159 * some unspecified Solaris versions.
160 * Note: Remember to #include <ctype.h> if you use these macros.
162 #define privoxy_isdigit(__X) isdigit((int)(unsigned char)(__X))
163 #define privoxy_isupper(__X) isupper((int)(unsigned char)(__X))
164 #define privoxy_toupper(__X) toupper((int)(unsigned char)(__X))
165 #define privoxy_tolower(__X) tolower((int)(unsigned char)(__X))
166 #define privoxy_isspace(__X) isspace((int)(unsigned char)(__X))
169 * Use for statically allocated buffers if you have no other choice.
170 * Remember to check the length of what you write into the buffer
171 * - we don't want any buffer overflows!
173 #define BUFFER_SIZE 5000
176 * Max length of CGI parameters (arbitrary limit).
178 #define CGI_PARAM_LEN_MAX 500U
181 * Buffer size for capturing struct hostent data in the
182 * gethostby(name|addr)_r library calls. Since we don't
183 * loop over gethostbyname_r, the buffer must be sufficient
184 * to accommodate multiple IN A RRs, as used in DNS round robin
185 * load balancing. W3C's wwwlib uses 1K, so that should be
186 * good enough for us, too.
189 * XXX: Temporary doubled, for some configurations
190 * 1K is still too small and we didn't get the
191 * real fix ready for inclusion.
193 #define HOSTENT_BUFFER_SIZE 2048
196 * Default TCP/IP address to listen on, as a string.
197 * Set to "127.0.0.1:8118".
199 #define HADDR_DEFAULT "127.0.0.1:8118"
202 /* Forward def for struct client_state */
203 struct configuration_spec;
207 * Entry in a linked list of strings.
212 * The string pointer. It must point to a dynamically malloc()ed
213 * string or be NULL for the list functions to work. In the latter
214 * case, just be careful next time you iterate through the list in
219 /** Next entry in the linked list, or NULL if no more. */
220 struct list_entry *next;
224 * A header for a linked list of strings.
228 /** First entry in the list, or NULL if the list is empty. */
229 struct list_entry *first;
231 /** Last entry in the list, or NULL if the list is empty. */
232 struct list_entry *last;
237 * An entry in a map. This is a name=value pair.
241 /** The key for the map. */
243 /** The value associated with that key. */
245 /** The next map entry, or NULL if none. */
246 struct map_entry *next;
250 * A map from a string to another string.
251 * This is used for the paramaters passed in a HTTP GET request, and
252 * to store the exports when the CGI interface is filling in a template.
256 /** The first map entry, or NULL if the map is empty. */
257 struct map_entry *first;
258 /** The last map entry, or NULL if the map is empty. */
259 struct map_entry *last;
264 * A HTTP request. This includes the method (GET, POST) and
267 * This is also used whenever we want to match a URL against a
268 * URL pattern. This always contains the URL to match, and never
269 * a URL pattern. (See struct url_spec).
273 char *cmd; /**< Whole command line: method, URL, Version */
274 char *ocmd; /**< Backup of original cmd for CLF logging */
275 char *gpc; /**< HTTP method: GET, POST, ... */
276 char *url; /**< The URL */
277 char *ver; /**< Protocol version */
278 int status; /**< HTTP Status */
280 char *host; /**< Host part of URL */
281 int port; /**< Port of URL or 80 (default) */
282 char *path; /**< Path of URL */
283 char *hostport; /**< host[:port] */
284 int ssl; /**< Flag if protocol is https */
286 char *host_ip_addr_str; /**< String with dotted decimal representation
287 of host's IP. NULL before connect_to() */
289 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
290 char *dbuffer; /**< Buffer with '\0'-delimited domain name. */
291 char **dvec; /**< List of pointers to the strings in dbuffer. */
292 int dcount; /**< How many parts to this domain? (length of dvec) */
293 #endif /* ndef FEATURE_EXTENDED_HOST_PATTERNS */
297 * Reasons for generating a http_response instead of delivering
298 * the requested resource. Mostly ordered the way they are checked
318 * Response generated by CGI, blocker, or error handler
322 char *status; /**< HTTP status (string). */
323 struct list headers[1]; /**< List of header lines. */
324 char *head; /**< Formatted http response head. */
325 size_t head_length; /**< Length of http response head. */
326 char *body; /**< HTTP document body. */
327 size_t content_length; /**< Length of body, REQUIRED if binary body. */
328 int is_static; /**< Nonzero if the content will never change and
329 should be cached by the browser (e.g. images). */
330 enum crunch_reason crunch_reason; /**< Why the response was generated in the first place. */
335 #ifdef FEATURE_EXTENDED_HOST_PATTERNS
336 regex_t *host_regex;/**< Regex for host matching */
338 char *dbuffer; /**< Buffer with '\0'-delimited domain name, or NULL to match all hosts. */
339 char **dvec; /**< List of pointers to the strings in dbuffer. */
340 int dcount; /**< How many parts to this domain? (length of dvec) */
341 int unanchored; /**< Bitmap - flags are ANCHOR_LEFT and ANCHOR_RIGHT. */
342 #endif /* defined FEATURE_EXTENDED_HOST_PATTERNS */
344 char *port_list; /**< List of acceptable ports, or NULL to match all ports */
346 regex_t *preg; /**< Regex for matching path part */
350 * A URL or a tag pattern.
354 /** The string which was parsed to produce this pattern_spec.
355 Used for debugging or display only. */
360 struct url_spec url_spec;
364 unsigned int flags; /**< Bitmap with various pattern properties. */
368 * Constant for host part matching in URLs. If set, indicates that the start of
369 * the pattern must match the start of the URL. E.g. this is not set for the
370 * pattern ".example.com", so that it will match both "example.com" and
371 * "www.example.com". It is set for the pattern "example.com", which makes it
372 * match "example.com" only, not "www.example.com".
374 #define ANCHOR_LEFT 1
377 * Constant for host part matching in URLs. If set, indicates that the end of
378 * the pattern must match the end of the URL. E.g. this is not set for the
379 * pattern "ad.", so that it will match any host called "ad", irrespective
380 * of how many subdomains are in the fully-qualified domain name.
382 #define ANCHOR_RIGHT 2
384 /** Pattern spec bitmap: It's an URL pattern. */
385 #define PATTERN_SPEC_URL_PATTERN 0x00000001UL
387 /** Pattern spec bitmap: It's a TAG pattern. */
388 #define PATTERN_SPEC_TAG_PATTERN 0x00000002UL
390 /** Pattern spec bitmap: It's a NO-REQUEST-TAG pattern. */
391 #define PATTERN_SPEC_NO_REQUEST_TAG_PATTERN 0x00000004UL
393 /** Pattern spec bitmap: It's a NO-RESPONSE-TAG pattern. */
394 #define PATTERN_SPEC_NO_RESPONSE_TAG_PATTERN 0x00000008UL
396 /** Pattern spec bitmap: It's a CLIENT-TAG pattern. */
397 #define PATTERN_SPEC_CLIENT_TAG_PATTERN 0x00000010UL
400 * An I/O buffer. Holds a string which can be appended to, and can have data
401 * removed from the beginning.
405 char *buf; /**< Start of buffer */
406 char *cur; /**< Start of relevant data */
407 char *eod; /**< End of relevant data */
408 size_t size; /**< Size as malloc()ed */
413 * Return the number of bytes in the I/O buffer associated with the passed
414 * I/O buffer. May be zero.
416 #define IOB_PEEK(IOB) ((IOB->cur > IOB->eod) ? (IOB->eod - IOB->cur) : 0)
419 /* Bits for csp->content_type bitmask: */
420 #define CT_TEXT 0x0001U /**< Suitable for pcrs filtering. */
421 #define CT_GIF 0x0002U /**< Suitable for GIF filtering. */
422 #define CT_TABOO 0x0004U /**< DO NOT filter, irrespective of other flags. */
424 /* Although these are not, strictly speaking, content types
425 * (they are content encodings), it is simple to handle them
428 #define CT_GZIP 0x0010U /**< gzip-compressed data. */
429 #define CT_DEFLATE 0x0020U /**< zlib-compressed data. */
432 * Flag to signal that the server declared the content type,
433 * so we can differentiate between unknown and undeclared
436 #define CT_DECLARED 0x0040U
439 * The mask which includes all actions.
441 #define ACTION_MASK_ALL (~0UL)
444 * The most compatible set of actions - i.e. none.
446 #define ACTION_MOST_COMPATIBLE 0x00000000UL
448 /** Action bitmap: Block the request. */
449 #define ACTION_BLOCK 0x00000001UL
450 /** Action bitmap: Deanimate if it's a GIF. */
451 #define ACTION_DEANIMATE 0x00000002UL
452 /** Action bitmap: Downgrade HTTP/1.1 to 1.0. */
453 #define ACTION_DOWNGRADE 0x00000004UL
454 /** Action bitmap: Fast redirects. */
455 #define ACTION_FAST_REDIRECTS 0x00000008UL
456 /** Action bitmap: Remove or add "X-Forwarded-For" header. */
457 #define ACTION_CHANGE_X_FORWARDED_FOR 0x00000010UL
458 /** Action bitmap: Hide "From" header. */
459 #define ACTION_HIDE_FROM 0x00000020UL
460 /** Action bitmap: Hide "Referer" header. (sic - follow HTTP, not English). */
461 #define ACTION_HIDE_REFERER 0x00000040UL
462 /** Action bitmap: Hide "User-Agent" and similar headers. */
463 #define ACTION_HIDE_USER_AGENT 0x00000080UL
464 /** Action bitmap: This is an image. */
465 #define ACTION_IMAGE 0x00000100UL
466 /** Action bitmap: Sets the image blocker. */
467 #define ACTION_IMAGE_BLOCKER 0x00000200UL
468 /** Action bitmap: Prevent compression. */
469 #define ACTION_NO_COMPRESSION 0x00000400UL
470 /** Action bitmap: Change cookies to session only cookies. */
471 #define ACTION_SESSION_COOKIES_ONLY 0x00000800UL
472 /** Action bitmap: Block cookies coming from the client. */
473 #define ACTION_CRUNCH_OUTGOING_COOKIES 0x00001000UL
474 /** Action bitmap: Block cookies coming from the server. */
475 #define ACTION_CRUNCH_INCOMING_COOKIES 0x00002000UL
476 /** Action bitmap: Override the forward settings in the config file */
477 #define ACTION_FORWARD_OVERRIDE 0x00004000UL
478 /** Action bitmap: Block as empty document */
479 #define ACTION_HANDLE_AS_EMPTY_DOCUMENT 0x00008000UL
480 /** Action bitmap: Limit CONNECT requests to safe ports. */
481 #define ACTION_LIMIT_CONNECT 0x00010000UL
482 /** Action bitmap: Redirect request. */
483 #define ACTION_REDIRECT 0x00020000UL
484 /** Action bitmap: Crunch or modify "if-modified-since" header. */
485 #define ACTION_HIDE_IF_MODIFIED_SINCE 0x00040000UL
486 /** Action bitmap: Overwrite Content-Type header. */
487 #define ACTION_CONTENT_TYPE_OVERWRITE 0x00080000UL
488 /** Action bitmap: Crunch specified server header. */
489 #define ACTION_CRUNCH_SERVER_HEADER 0x00100000UL
490 /** Action bitmap: Crunch specified client header */
491 #define ACTION_CRUNCH_CLIENT_HEADER 0x00200000UL
492 /** Action bitmap: Enable text mode by force */
493 #define ACTION_FORCE_TEXT_MODE 0x00400000UL
494 /** Action bitmap: Remove the "If-None-Match" header. */
495 #define ACTION_CRUNCH_IF_NONE_MATCH 0x00800000UL
496 /** Action bitmap: Enable content-disposition crunching */
497 #define ACTION_HIDE_CONTENT_DISPOSITION 0x01000000UL
498 /** Action bitmap: Replace or block Last-Modified header */
499 #define ACTION_OVERWRITE_LAST_MODIFIED 0x02000000UL
500 /** Action bitmap: Replace or block Accept-Language header */
501 #define ACTION_HIDE_ACCEPT_LANGUAGE 0x04000000UL
502 /** Action bitmap: Limit the cookie lifetime */
503 #define ACTION_LIMIT_COOKIE_LIFETIME 0x08000000UL
504 /** Action bitmap: Delay writes */
505 #define ACTION_DELAY_RESPONSE 0x10000000UL
508 /** Action string index: How to deanimate GIFs */
509 #define ACTION_STRING_DEANIMATE 0
510 /** Action string index: Replacement for "From:" header */
511 #define ACTION_STRING_FROM 1
512 /** Action string index: How to block images */
513 #define ACTION_STRING_IMAGE_BLOCKER 2
514 /** Action string index: Replacement for "Referer:" header */
515 #define ACTION_STRING_REFERER 3
516 /** Action string index: Replacement for "User-Agent:" header */
517 #define ACTION_STRING_USER_AGENT 4
518 /** Action string index: Legal CONNECT ports. */
519 #define ACTION_STRING_LIMIT_CONNECT 5
520 /** Action string index: Server headers containing this pattern are crunched*/
521 #define ACTION_STRING_SERVER_HEADER 6
522 /** Action string index: Client headers containing this pattern are crunched*/
523 #define ACTION_STRING_CLIENT_HEADER 7
524 /** Action string index: Replacement for the "Accept-Language:" header*/
525 #define ACTION_STRING_LANGUAGE 8
526 /** Action string index: Replacement for the "Content-Type:" header*/
527 #define ACTION_STRING_CONTENT_TYPE 9
528 /** Action string index: Replacement for the "content-disposition:" header*/
529 #define ACTION_STRING_CONTENT_DISPOSITION 10
530 /** Action string index: Replacement for the "If-Modified-Since:" header*/
531 #define ACTION_STRING_IF_MODIFIED_SINCE 11
532 /** Action string index: Replacement for the "Last-Modified:" header. */
533 #define ACTION_STRING_LAST_MODIFIED 12
534 /** Action string index: Redirect URL */
535 #define ACTION_STRING_REDIRECT 13
536 /** Action string index: Decode before redirect? */
537 #define ACTION_STRING_FAST_REDIRECTS 14
538 /** Action string index: Overriding forward rule. */
539 #define ACTION_STRING_FORWARD_OVERRIDE 15
540 /** Action string index: Reason for the block. */
541 #define ACTION_STRING_BLOCK 16
542 /** Action string index: what to do with the "X-Forwarded-For" header. */
543 #define ACTION_STRING_CHANGE_X_FORWARDED_FOR 17
544 /** Action string index: how many minutes cookies should be valid. */
545 #define ACTION_STRING_LIMIT_COOKIE_LIFETIME 18
546 /** Action string index: how many milliseconds writes should be delayed. */
547 #define ACTION_STRING_DELAY_RESPONSE 19
548 /** Number of string actions. */
549 #define ACTION_STRING_COUNT 20
552 /* To make the ugly hack in sed easier to understand */
553 #define CHECK_EVERY_HEADER_REMAINING 0
556 /** Index into current_action_spec::multi[] for headers to add. */
557 #define ACTION_MULTI_ADD_HEADER 0
558 /** Index into current_action_spec::multi[] for content filters to apply. */
559 #define ACTION_MULTI_FILTER 1
560 /** Index into current_action_spec::multi[] for server-header filters to apply. */
561 #define ACTION_MULTI_SERVER_HEADER_FILTER 2
562 /** Index into current_action_spec::multi[] for client-header filters to apply. */
563 #define ACTION_MULTI_CLIENT_HEADER_FILTER 3
564 /** Index into current_action_spec::multi[] for client-header tags to apply. */
565 #define ACTION_MULTI_CLIENT_HEADER_TAGGER 4
566 /** Index into current_action_spec::multi[] for server-header tags to apply. */
567 #define ACTION_MULTI_SERVER_HEADER_TAGGER 5
568 /** Number of multi-string actions. */
569 #define ACTION_MULTI_EXTERNAL_FILTER 6
570 /** Number of multi-string actions. */
571 #define ACTION_MULTI_COUNT 7
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 * Parameters 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 pattern_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. */
644 enum forwarder_type {
645 /**< Don't use a SOCKS server, forward to a HTTP proxy directly */
647 /**< original SOCKS 4 protocol */
649 /**< SOCKS 4A, DNS resolution is done by the SOCKS server */
651 /**< SOCKS 5 with hostnames, DNS resolution is done by the SOCKS server */
653 /**< Like SOCKS5, but uses non-standard Tor extensions (currently only optimistic data) */
656 * Don't use a SOCKS server, forward to the specified webserver.
657 * The difference to SOCKS_NONE is that a request line without
664 * Structure to hold the server socket and the information
665 * required to make sure we only reuse the connection if
666 * the host and forwarding settings are the same.
668 struct reusable_connection
672 time_t timestamp; /* XXX: rename? */
675 time_t response_received;
678 * Number of seconds after which this
679 * connection will no longer be reused.
681 unsigned int keep_alive_timeout;
683 * Number of requests that were sent to this connection.
684 * This is currently only for debugging purposes.
686 unsigned int requests_sent_total;
690 enum forwarder_type forwarder_type;
699 * Flags for use in csp->flags
703 * Flag for csp->flags: Set if this client is processing data.
704 * Cleared when the thread associated with this structure dies.
706 #define CSP_FLAG_ACTIVE 0x01U
709 * Flag for csp->flags: Set if the server's reply is in "chunked"
712 #define CSP_FLAG_CHUNKED 0x02U
715 * Flag for csp->flags: Set if this request was enforced, although it would
716 * normally have been blocked.
718 #define CSP_FLAG_FORCED 0x04U
721 * Flag for csp->flags: Set if any modification to the body was done.
723 #define CSP_FLAG_MODIFIED 0x08U
726 * Flag for csp->flags: Set if request was blocked.
728 #define CSP_FLAG_REJECTED 0x10U
731 * Flag for csp->flags: Set if we are toggled on (FEATURE_TOGGLE).
733 #define CSP_FLAG_TOGGLED_ON 0x20U
736 * Flag for csp->flags: Set if an acceptable Connection header
737 * has already been set by the client.
739 #define CSP_FLAG_CLIENT_CONNECTION_HEADER_SET 0x00000040U
742 * Flag for csp->flags: Set if an acceptable Connection header
743 * has already been set by the server.
745 #define CSP_FLAG_SERVER_CONNECTION_HEADER_SET 0x00000080U
748 * Flag for csp->flags: Signals header parsers whether they
749 * are parsing server or client headers.
751 #define CSP_FLAG_CLIENT_HEADER_PARSING_DONE 0x00000100U
754 * Flag for csp->flags: Set if adding the Host: header
757 #define CSP_FLAG_HOST_HEADER_IS_SET 0x00000200U
760 * Flag for csp->flags: Set if filtering is disabled by X-Filter: No
761 * XXX: As we now have tags we might as well ditch this.
763 #define CSP_FLAG_NO_FILTERING 0x00000400U
766 * Flag for csp->flags: Set the client IP has appended to
767 * an already existing X-Forwarded-For header in which case
768 * no new header has to be generated.
770 #define CSP_FLAG_X_FORWARDED_FOR_APPENDED 0x00000800U
773 * Flag for csp->flags: Set if the server wants to keep
774 * the connection alive.
776 #define CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE 0x00001000U
779 * Flag for csp->flags: Set if the server specified the
782 #define CSP_FLAG_SERVER_CONTENT_LENGTH_SET 0x00002000U
785 * Flag for csp->flags: Set if we know the content length,
786 * either because the server set it, or we figured it out
789 #define CSP_FLAG_CONTENT_LENGTH_SET 0x00004000U
792 * Flag for csp->flags: Set if the client wants to keep
793 * the connection alive.
795 #define CSP_FLAG_CLIENT_CONNECTION_KEEP_ALIVE 0x00008000U
798 * Flag for csp->flags: Set if we think we got the whole
799 * client request and shouldn't read any additional data
800 * coming from the client until the current request has
803 #define CSP_FLAG_CLIENT_REQUEST_COMPLETELY_READ 0x00010000U
806 * Flag for csp->flags: Set if the server promised us to
807 * keep the connection open for a known number of seconds.
809 #define CSP_FLAG_SERVER_KEEP_ALIVE_TIMEOUT_SET 0x00020000U
812 * Flag for csp->flags: Set if we think we can't reuse
813 * the server socket. XXX: It's also set after sabotaging
814 * pipelining attempts which is somewhat inconsistent with
817 #define CSP_FLAG_SERVER_SOCKET_TAINTED 0x00040000U
820 * Flag for csp->flags: Set if the Proxy-Connection header
821 * is among the server headers.
823 #define CSP_FLAG_SERVER_PROXY_CONNECTION_HEADER_SET 0x00080000U
826 * Flag for csp->flags: Set if the client reused its connection.
828 #define CSP_FLAG_REUSED_CLIENT_CONNECTION 0x00100000U
831 * Flag for csp->flags: Set if the supports deflate compression.
833 #define CSP_FLAG_CLIENT_SUPPORTS_DEFLATE 0x00200000U
836 * Flag for csp->flags: Set if the content has been deflated by Privoxy
838 #define CSP_FLAG_BUFFERED_CONTENT_DEFLATED 0x00400000U
841 * Flag for csp->flags: Set if we already read (parts of)
842 * a pipelined request in which case the client obviously
843 * isn't done talking.
845 #define CSP_FLAG_PIPELINED_REQUEST_WAITING 0x00800000U
848 * Flag for csp->flags: Set if the client body is chunk-encoded
850 #define CSP_FLAG_CHUNKED_CLIENT_BODY 0x01000000U
853 * Flag for csp->flags: Set if the client set the Expect header
855 #define CSP_FLAG_UNSUPPORTED_CLIENT_EXPECTATION 0x02000000U
858 * Flag for csp->flags: Set if we answered the request ourselve.
860 #define CSP_FLAG_CRUNCHED 0x04000000U
864 * Flag for csp->flags: Set if we are working with fuzzed input
866 #define CSP_FLAG_FUZZED_INPUT 0x08000000U
870 * Flags for use in return codes of child processes
874 * Flag for process return code: Set if exiting process has been toggled
875 * during its lifetime.
877 #define RC_FLAG_TOGGLED 0x10
880 * Flag for process return code: Set if exiting process has blocked its
883 #define RC_FLAG_BLOCKED 0x20
886 * Maximum number of actions/filter files. This limit is arbitrary - it's just used
889 #define MAX_AF_FILES 30
892 * Maximum number of sockets to listen to. This limit is arbitrary - it's just used
895 #define MAX_LISTENING_SOCKETS 10
898 * The state of a Privoxy processing thread.
902 /** The proxy's configuration */
903 struct configuration_spec * config;
905 /** The actions to perform on the current request */
906 struct current_action_spec action[1];
908 /** socket to talk to client (web browser) */
911 /** Number of requests received on the client socket. */
912 unsigned int requests_received_total;
914 /** current connection to the server (may go through a proxy) */
915 struct reusable_connection server_connection;
917 /** Multi-purpose flag container, see CSP_FLAG_* above */
920 /** Client PC's IP address, as reported by the accept() function.
924 /** Client PC's TCP address, as reported by the accept() function.
926 struct sockaddr_storage tcp_addr;
928 /** Client PC's IP address, as reported by the accept() function.
930 unsigned long ip_addr_long;
931 #endif /* def HAVE_RFC2553 */
933 /** The host name and port (as a string of the form '<hostname>:<port>')
934 of the server socket to which the client connected. */
935 char *listen_addr_str;
937 /** The URL that was requested */
938 struct http_request http[1];
941 * The final forwarding settings.
942 * XXX: Currently this is only used for forward-override,
943 * so we can free the space in sweep.
945 struct forward_spec * fwd;
947 /** An I/O buffer used for buffering data read from the server */
948 /* XXX: should be renamed to server_iob */
951 /** An I/O buffer used for buffering data read from the client */
952 struct iob client_iob[1];
954 /** Buffer used to briefly store data read from the network
955 * before forwarding or processing it.
957 char *receive_buffer;
958 size_t receive_buffer_size;
960 /** List of all headers for this request */
961 struct list headers[1];
963 /** List of all tags that apply to this request */
966 #ifdef FEATURE_CLIENT_TAGS
967 /** List of all tags that apply to this client (assigned based on address) */
968 struct list client_tags[1];
969 /** The address of the client the request (presumably) came from.
970 * Either the address returned by accept(), or the address provided
971 * with the X-Forwarded-For header, provided Privoxy has been configured
974 char *client_address;
977 /** MIME-Type key, see CT_* above */
978 unsigned int content_type;
980 /** Actions files associated with this client */
981 struct file_list *actions_list[MAX_AF_FILES];
983 /** pcrs job files. */
984 struct file_list *rlist[MAX_AF_FILES];
986 /** Length after content modification. */
987 unsigned long long content_length;
989 /* XXX: is this the right location? */
991 /** Expected length of content after which we
992 * should stop reading from the server socket.
994 unsigned long long expected_content_length;
996 /** Expected length of content after which we
997 * should stop reading from the client socket.
999 unsigned long long expected_client_content_length;
1001 #ifdef FEATURE_TRUST
1004 struct file_list *tlist;
1006 #endif /* def FEATURE_TRUST */
1009 * Failure reason to embedded in the CGI error page,
1010 * or NULL. Currently only used for socks errors.
1012 char *error_message;
1016 * List of client states so the main thread can keep
1017 * track of them and garbage collect their resources.
1019 struct client_states
1021 struct client_states *next;
1022 struct client_state csp;
1026 * A function to add a header
1028 typedef jb_err (*add_header_func_ptr)(struct client_state *);
1031 * A function to process a header
1033 typedef jb_err (*parser_func_ptr )(struct client_state *, char **);
1037 * List of available CGI functions.
1039 struct cgi_dispatcher
1041 /** The URL of the CGI, relative to the CGI root. */
1042 const char * const name;
1044 /** The handler function for the CGI */
1045 jb_err (* const handler)(struct client_state *csp, struct http_response *rsp, const struct map *parameters);
1047 /** The description of the CGI, to appear on the main menu, or NULL to hide it. */
1048 const char * const description;
1050 /** A flag that indicates whether unintentional calls to this CGI can cause damage */
1056 * A data file used by Privoxy. Kept in a linked list.
1061 * This is a pointer to the data structures associated with the file.
1062 * Read-only once the structure has been created.
1067 * The unloader function.
1068 * Normally NULL. When we are finished with file (i.e. when we have
1069 * loaded a new one), set to a pointer to an unloader function.
1070 * Unloader will be called by sweep() (called from main loop) when
1071 * all clients using this file are done. This prevents threading
1074 void (*unloader)(void *);
1077 * Used internally by sweep(). Do not access from elsewhere.
1082 * File last-modified time, so we can check if file has been changed.
1083 * Read-only once the structure has been created.
1085 time_t lastmodified;
1088 * The full filename.
1093 * Pointer to next entry in the linked list of all "file_list"s.
1094 * This linked list is so that sweep() can navigate it.
1095 * Since sweep() can remove items from the list, we must be careful
1096 * to only access this value from main thread (when we know sweep
1097 * won't be running).
1099 struct file_list *next;
1103 #ifdef FEATURE_TRUST
1106 * The format of a trust file when loaded into memory.
1110 struct pattern_spec url[1]; /**< The URL pattern */
1111 int reject; /**< FIXME: Please document this! */
1112 struct block_spec *next; /**< Next entry in linked list */
1116 * Arbitrary limit for the number of trusted referrers.
1118 #define MAX_TRUSTED_REFERRERS 512
1120 #endif /* def FEATURE_TRUST */
1123 * How to forward a connection to a parent proxy.
1127 /** URL pattern that this forward_spec is for. */
1128 struct pattern_spec url[1];
1130 /** Connection type. Must be SOCKS_NONE, SOCKS_4, SOCKS_4A or SOCKS_5. */
1131 enum forwarder_type type;
1133 /** SOCKS server hostname. Only valid if "type" is SOCKS_4 or SOCKS_4A. */
1136 /** SOCKS server port. */
1139 /** Parent HTTP proxy hostname, or NULL for none. */
1142 /** Parent HTTP proxy port. */
1145 /** Next entry in the linked list. */
1146 struct forward_spec *next;
1150 /* Supported filter types */
1153 FT_CONTENT_FILTER = 0,
1154 FT_CLIENT_HEADER_FILTER = 1,
1155 FT_SERVER_HEADER_FILTER = 2,
1156 FT_CLIENT_HEADER_TAGGER = 3,
1157 FT_SERVER_HEADER_TAGGER = 4,
1158 #ifdef FEATURE_EXTERNAL_FILTERS
1159 FT_EXTERNAL_CONTENT_FILTER = 5,
1161 FT_INVALID_FILTER = 42,
1164 #ifdef FEATURE_EXTERNAL_FILTERS
1165 #define MAX_FILTER_TYPES 6
1167 #define MAX_FILTER_TYPES 5
1171 * This struct represents one filter (one block) from
1172 * the re_filterfile. If there is more than one filter
1173 * in the file, the file will be represented by a
1174 * chained list of re_filterfile specs.
1176 struct re_filterfile_spec
1178 char *name; /**< Name from FILTER: statement in re_filterfile. */
1179 char *description; /**< Description from FILTER: statement in re_filterfile. */
1180 struct list patterns[1]; /**< The patterns from the re_filterfile. */
1181 pcrs_job *joblist; /**< The resulting compiled pcrs_jobs. */
1182 enum filter_type type; /**< Filter type (content, client-header, server-header). */
1183 int dynamic; /**< Set to one if the pattern might contain variables
1184 and has to be recompiled for every request. */
1185 struct re_filterfile_spec *next; /**< The pointer for chaining. */
1191 #define ACL_PERMIT 1 /**< Accept connection request */
1192 #define ACL_DENY 2 /**< Reject connection request */
1195 * An IP address pattern. Used to specify networks in the ACL.
1197 struct access_control_addr
1200 struct sockaddr_storage addr; /* <The TCP address in network order. */
1201 struct sockaddr_storage mask; /* <The TCP mask in network order. */
1203 unsigned long addr; /**< The IP address as an integer. */
1204 unsigned long mask; /**< The network mask as an integer. */
1205 unsigned long port; /**< The port number. */
1206 #endif /* HAVE_RFC2553 */
1210 * An access control list (ACL) entry.
1212 * This is a linked list.
1214 struct access_control_list
1216 struct access_control_addr src[1]; /**< Client IP address */
1217 struct access_control_addr dst[1]; /**< Website or parent proxy IP address */
1219 int wildcard_dst; /** < dst address is wildcard */
1222 short action; /**< ACL_PERMIT or ACL_DENY */
1223 struct access_control_list *next; /**< The next entry in the ACL. */
1226 #endif /* def FEATURE_ACL */
1229 /** Maximum number of loaders (actions, re_filter, ...) */
1233 * This struct represents a client-spcific-tag and it's description
1235 struct client_tag_spec
1237 char *name; /**< Name from "client-specific-tag bla" directive */
1238 char *description; /**< Description from "client-specific-tag-description " directive */
1239 struct client_tag_spec *next; /**< The pointer for chaining. */
1242 /** configuration_spec::feature_flags: CGI actions editor. */
1243 #define RUNTIME_FEATURE_CGI_EDIT_ACTIONS 1U
1245 /** configuration_spec::feature_flags: Web-based toggle. */
1246 #define RUNTIME_FEATURE_CGI_TOGGLE 2U
1248 /** configuration_spec::feature_flags: HTTP-header-based toggle. */
1249 #define RUNTIME_FEATURE_HTTP_TOGGLE 4U
1251 /** configuration_spec::feature_flags: Split large forms to limit the number of GET arguments. */
1252 #define RUNTIME_FEATURE_SPLIT_LARGE_FORMS 8U
1254 /** configuration_spec::feature_flags: Check the host header for requests with host-less request lines. */
1255 #define RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS 16U
1257 /** configuration_spec::feature_flags: Don't allow to circumvent blocks with the force prefix. */
1258 #define RUNTIME_FEATURE_ENFORCE_BLOCKS 32U
1260 /** configuration_spec::feature_flags: Allow to block or redirect CGI requests. */
1261 #define RUNTIME_FEATURE_CGI_CRUNCHING 64U
1263 /** configuration_spec::feature_flags: Try to keep the connection to the server alive. */
1264 #define RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE 128U
1266 /** configuration_spec::feature_flags: Share outgoing connections between different client connections. */
1267 #define RUNTIME_FEATURE_CONNECTION_SHARING 256U
1269 /** configuration_spec::feature_flags: Pages blocked with +handle-as-empty-doc get a return status of 200 OK. */
1270 #define RUNTIME_FEATURE_EMPTY_DOC_RETURNS_OK 512U
1272 /** configuration_spec::feature_flags: Buffered content is sent compressed if the client supports it. */
1273 #define RUNTIME_FEATURE_COMPRESSION 1024U
1275 /** configuration_spec::feature_flags: Pipelined requests are served instead of being discarded. */
1276 #define RUNTIME_FEATURE_TOLERATE_PIPELINING 2048U
1278 /** configuration_spec::feature_flags: Proxy authentication headers are forwarded instead of removed. */
1279 #define RUNTIME_FEATURE_FORWARD_PROXY_AUTHENTICATION_HEADERS 4096U
1282 * Data loaded from the configuration file.
1284 * (Anomaly: toggle is still handled through a global, not this structure)
1286 struct configuration_spec
1291 /** Nonzero to enable multithreading. */
1294 /** Bitmask of features that can be controlled through the config file. */
1295 unsigned feature_flags;
1297 /** The log file name. */
1298 const char *logfile;
1300 /** The config file directory. */
1301 const char *confdir;
1303 /** The directory for customized CGI templates. */
1304 const char *templdir;
1306 #ifdef FEATURE_EXTERNAL_FILTERS
1307 /** The template used to create temporary files. */
1308 const char *temporary_directory;
1311 /** The log file directory. */
1314 /** The full paths to the actions files. */
1315 const char *actions_file[MAX_AF_FILES];
1317 /** The short names of the actions files. */
1318 const char *actions_file_short[MAX_AF_FILES];
1320 /** The administrator's email address */
1321 char *admin_address;
1323 /** A URL with info on this proxy */
1324 char *proxy_info_url;
1326 /** URL to the user manual (on our website or local copy) */
1329 /** The file names of the pcre filter files. */
1330 const char *re_filterfile[MAX_AF_FILES];
1332 /** The short names of the pcre filter files. */
1333 const char *re_filterfile_short[MAX_AF_FILES];
1335 /**< List of ordered client header names. */
1336 struct list ordered_client_headers[1];
1338 /** The hostname to show on CGI pages, or NULL to use the real one. */
1339 const char *hostname;
1341 /** IP addresses to bind to. Defaults to HADDR_DEFAULT == 127.0.0.1. */
1342 const char *haddr[MAX_LISTENING_SOCKETS];
1344 /** Trusted referring site that can be used to reach CGI
1345 * pages that aren't marked as harmful.
1347 const char *trusted_cgi_referrer;
1349 /** Ports to bind to. Defaults to HADDR_PORT == 8118. */
1350 int hport[MAX_LISTENING_SOCKETS];
1352 /** Size limit for IOB */
1353 size_t buffer_limit;
1355 /** Size of the receive buffer */
1356 size_t receive_buffer_size;
1358 /** Use accf_http(4) if available */
1359 int enable_accept_filter;
1361 /** Backlog passed to listen() */
1364 #ifdef FEATURE_TRUST
1366 /** The file name of the trust file. */
1367 const char * trustfile;
1369 /** FIXME: DOCME: Document this. */
1370 struct list trust_info[1];
1372 /** FIXME: DOCME: Document this. */
1373 struct pattern_spec *trust_list[MAX_TRUSTED_REFERRERS];
1375 #endif /* def FEATURE_TRUST */
1377 #ifdef FEATURE_CLIENT_TAGS
1378 struct client_tag_spec client_tags[1];
1380 /* Maximum number of seconds a temporarily enabled tag stays enabled. */
1381 unsigned int client_tag_lifetime;
1382 #endif /* def FEATURE_CLIENT_TAGS */
1383 int trust_x_forwarded_for;
1387 /** The access control list (ACL). */
1388 struct access_control_list *acl;
1390 #endif /* def FEATURE_ACL */
1392 /** Information about parent proxies (forwarding). */
1393 struct forward_spec *forward;
1395 /** Number of retries in case a forwarded connection attempt fails */
1396 int forwarded_connect_retries;
1398 /** Maximum number of client connections. */
1399 int max_client_connections;
1401 /* Timeout when waiting on sockets for data to become available. */
1404 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
1405 /* Maximum number of seconds after which an open connection will no longer be reused. */
1406 unsigned int keep_alive_timeout;
1408 /* Assumed server-side keep alive timeout if none is specified. */
1409 unsigned int default_server_timeout;
1412 #ifdef FEATURE_COMPRESSION
1413 int compression_level;
1416 /** All options from the config file, HTML-formatted. */
1419 /** The configuration file object. */
1420 struct file_list *config_file_list;
1422 /** List of loaders */
1423 int (*loaders[NLOADERS])(struct client_state *);
1425 /** Nonzero if we need to bind() to the new port. */
1429 /** Calculates the number of elements in an array, using sizeof. */
1430 #define SZ(X) (sizeof(X) / sizeof(*X))
1432 /** The force load URL prefix. Not behind an ifdef because
1433 * it's always used for the show-status page. */
1434 #define FORCE_PREFIX "/PRIVOXY-FORCE"
1436 #ifdef FEATURE_NO_GIFS
1437 /** The MIME type for images ("image/png" or "image/gif"). */
1438 #define BUILTIN_IMAGE_MIMETYPE "image/png"
1440 #define BUILTIN_IMAGE_MIMETYPE "image/gif"
1441 #endif /* def FEATURE_NO_GIFS */
1448 /** URL for the Privoxy home page. */
1449 #define HOME_PAGE_URL "https://www.privoxy.org/"
1451 /** URL for the Privoxy user manual. */
1452 #define USER_MANUAL_URL HOME_PAGE_URL VERSION "/user-manual/"
1454 /** Prefix for actions help links (append to USER_MANUAL_URL). */
1455 #define ACTIONS_HELP_PREFIX "actions-file.html#"
1457 /** Prefix for config option help links (append to USER_MANUAL_URL). */
1458 #define CONFIG_HELP_PREFIX "config.html#"
1461 * The "hosts" to intercept and display CGI pages.
1462 * First one is a hostname only, second one can specify host and path.
1465 * 1) Do not specify the http: prefix
1466 * 2) CGI_SITE_2_PATH must not end with /, one will be added automatically.
1467 * 3) CGI_SITE_2_PATH must start with /, unless it is the empty string.
1469 #define CGI_SITE_1_HOST "p.p"
1470 #define CGI_SITE_2_HOST "config.privoxy.org"
1471 #define CGI_SITE_2_PATH ""
1474 * The prefix for CGI pages. Written out in generated HTML.
1475 * INCLUDES the trailing slash.
1477 #define CGI_PREFIX "http://" CGI_SITE_2_HOST CGI_SITE_2_PATH "/"
1479 #endif /* ndef PROJECT_H_INCLUDED */