3 #define PROJECT_H_VERSION "$Id: project.h,v 1.23 2001/07/18 12:32:23 oes Exp $"
4 /*********************************************************************
6 * File : $Source: /cvsroot/ijbswa/current/project.h,v $
8 * Purpose : Defines data structures which are widely used in the
9 * project. Does not define any variables or functions
10 * (though it does declare some macros).
12 * Copyright : Written by and Copyright (C) 2001 the SourceForge
13 * IJBSWA team. http://ijbswa.sourceforge.net
15 * Based on the Internet Junkbuster originally written
16 * by and Copyright (C) 1997 Anonymous Coders and
17 * Junkbusters Corporation. http://www.junkbusters.com
19 * This program is free software; you can redistribute it
20 * and/or modify it under the terms of the GNU General
21 * Public License as published by the Free Software
22 * Foundation; either version 2 of the License, or (at
23 * your option) any later version.
25 * This program is distributed in the hope that it will
26 * be useful, but WITHOUT ANY WARRANTY; without even the
27 * implied warranty of MERCHANTABILITY or FITNESS FOR A
28 * PARTICULAR PURPOSE. See the GNU General Public
29 * License for more details.
31 * The GNU General Public License should be included with
32 * this file. If not, you can view it at
33 * http://www.gnu.org/copyleft/gpl.html
34 * or write to the Free Software Foundation, Inc., 59
35 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
39 * Revision 1.23 2001/07/18 12:32:23 oes
40 * - Added ACTION_STRING_DEANIMATE
41 * - moved #define freez from jcc.h to project.h
43 * Revision 1.22 2001/07/15 17:51:41 jongfoster
44 * Renaming #define STATIC to STATIC_PCRE
46 * Revision 1.21 2001/07/13 14:03:19 oes
47 * - Reorganized regex header inclusion and #defines to
48 * comply to the scheme in configure.in
49 * - Added csp->content_type and its CT_* keys
50 * - Added ACTION_DEANIMATE
51 * - Removed all #ifdef PCRS
53 * Revision 1.20 2001/06/29 21:45:41 oes
54 * Indentation, CRLF->LF, Tab-> Space
56 * Revision 1.19 2001/06/29 13:33:36 oes
58 * - Introduced http_request.host_ip_addr_str
59 * - Introduced http_response.head_length
60 * - Introduced config.my_ip_addr_str, config.my_hostname,
61 * config.admin_address and config.proxy_info_url
62 * - Removed config.proxy_args_header and config.proxy_args_trailer,
63 * renamed config.proxy_args_invocation to config.proxy_args
64 * - Removed HTML snipplets and GIFs
65 * - Removed logentry from cancelled commit
67 * Revision 1.18 2001/06/09 10:57:39 jongfoster
68 * Adding definition of BUFFER_SIZE.
69 * Changing struct cgi_dispatcher to use "const" strings.
71 * Revision 1.17 2001/06/07 23:15:09 jongfoster
72 * Merging ACL and forward files into config file.
73 * Moving struct gateway members into struct forward_spec
74 * Removing config->proxy_args_gateways
75 * Cosmetic: Adding a few comments
77 * Revision 1.16 2001/06/04 18:31:58 swa
78 * files are now prefixed with either `confdir' or `logdir'.
79 * `make redhat-dist' replaces both entries confdir and logdir
82 * Revision 1.15 2001/06/04 11:28:53 swa
83 * redirect did not work due to missing /
85 * Revision 1.14 2001/06/03 11:03:48 oes
87 * added struct http_response,
88 * changed struct interceptors to struct cgi_dispatcher,
89 * moved HTML stuff to cgi.h
91 * Revision 1.13 2001/06/01 20:05:36 jongfoster
92 * Support for +image-blocker{}: added ACTION_IMAGE_BLOCKER
93 * constant, and removed csp->tinygif.
95 * Revision 1.12 2001/06/01 18:49:17 jongfoster
96 * Replaced "list_share" with "list" - the tiny memory gain was not
97 * worth the extra complexity.
99 * Revision 1.11 2001/06/01 10:32:47 oes
100 * Added constants for anchoring selection bitmap
102 * Revision 1.10 2001/05/31 21:33:53 jongfoster
103 * Changes for new actions file, replacing permissionsfile
104 * and parts of the config file. Also added support for
107 * Revision 1.9 2001/05/31 17:32:31 oes
109 * - Enhanced domain part globbing with infix and prefix asterisk
110 * matching and optional unanchored operation
112 * Revision 1.8 2001/05/29 20:09:15 joergs
113 * HTTP_REDIRECT_TEMPLATE fixed.
115 * Revision 1.7 2001/05/29 09:50:24 jongfoster
116 * Unified blocklist/imagelist/actionslist.
117 * File format is still under discussion, but the internal changes
120 * Also modified interceptor behaviour:
121 * - We now intercept all URLs beginning with one of the following
122 * prefixes (and *only* these prefixes):
124 * * http://ijbswa.sf.net/config/
125 * * http://ijbswa.sourceforge.net/config/
126 * - New interceptors "home page" - go to http://i.j.b/ to see it.
127 * - Internal changes so that intercepted and fast redirect pages
128 * are not replaced with an image.
129 * - Interceptors now have the option to send a binary page direct
130 * to the client. (i.e. ijb-send-banner uses this)
131 * - Implemented show-url-info interceptor. (Which is why I needed
132 * the above interceptors changes - a typical URL is
133 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
134 * The previous mechanism would not have intercepted that, and
135 * if it had been intercepted then it then it would have replaced
138 * Revision 1.6 2001/05/27 22:17:04 oes
140 * - re_process_buffer no longer writes the modified buffer
141 * to the client, which was very ugly. It now returns the
142 * buffer, which it is then written by chat.
144 * - content_length now adjusts the Content-Length: header
145 * for modified documents rather than crunch()ing it.
146 * (Length info in csp->content_length, which is 0 for
147 * unmodified documents)
149 * - For this to work, sed() is called twice when filtering.
151 * Revision 1.5 2001/05/26 00:28:36 jongfoster
152 * Automatic reloading of config file.
153 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
154 * Most of the global variables have been moved to a new
155 * struct configuration_spec, accessed through csp->config->globalname
156 * Most of the globals remaining are used by the Win32 GUI.
158 * Revision 1.4 2001/05/22 18:46:04 oes
160 * - Enabled filtering banners by size rather than URL
161 * by adding patterns that replace all standard banner
162 * sizes with the "Junkbuster" gif to the re_filterfile
164 * - Enabled filtering WebBugs by providing a pattern
165 * which kills all 1x1 images
167 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
168 * which is selected by the (nonstandard and therefore
169 * capital) letter 'U' in the option string.
170 * It causes the quantifiers to be ungreedy by default.
171 * Appending a ? turns back to greedy (!).
173 * - Added a new interceptor ijb-send-banner, which
174 * sends back the "Junkbuster" gif. Without imagelist or
175 * MSIE detection support, or if tinygif = 1, or the
176 * URL isn't recognized as an imageurl, a lame HTML
177 * explanation is sent instead.
179 * - Added new feature, which permits blocking remote
180 * script redirects and firing back a local redirect
182 * The feature is conditionally compiled, i.e. it
183 * can be disabled with --disable-fast-redirects,
184 * plus it must be activated by a "fast-redirects"
185 * line in the config file, has its own log level
186 * and of course wants to be displayed by show-proxy-args
187 * Note: Boy, all the #ifdefs in 1001 locations and
188 * all the fumbling with configure.in and acconfig.h
189 * were *way* more work than the feature itself :-(
191 * - Because a generic redirect template was needed for
192 * this, tinygif = 3 now uses the same.
194 * - Moved GIFs, and other static HTTP response templates
199 * - Removed some >400 CRs again (Jon, you really worked
202 * Revision 1.3 2001/05/20 01:21:20 jongfoster
203 * Version 2.9.4 checkin.
204 * - Merged popupfile and cookiefile, and added control over PCRS
205 * filtering, in new "actionsfile".
206 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
207 * file error you now get a message box (in the Win32 GUI) rather
208 * than the program exiting with no explanation.
209 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
211 * - Removed tabs from "config"
212 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
213 * - Bumped up version number.
215 * Revision 1.2 2001/05/17 23:01:01 oes
216 * - Cleaned CRLF's from the sources and related files
218 * Revision 1.1.1.1 2001/05/15 13:59:03 oes
219 * Initial import of version 2.9.3 source tree
222 *********************************************************************/
225 /* Declare struct FILE for vars and funcs. */
228 /* Need time_t for file_list */
232 * Include appropriate regular expression libraries.
233 * Note that pcrs and pcre (native) are needed for cgi
234 * and are included anyway.
237 #if defined(REGEX_PCRE) || defined (REGEX_GNU)
239 #endif /* defined(REGEX_PCRE) || defined (REGEX_GNU) */
253 #if defined(REGEX_PCRE)
255 # include "pcreposix.h"
257 # include <pcreposix.h>
259 #endif /* defined(REGEX_PCRE) */
261 #if defined(REGEX_GNU)
262 # include "gnu_regex.h"
267 #endif /* def AMIGA */
273 #define freez(X) if(X) free(X); X = NULL
275 #define BUFFER_SIZE 5000
279 /* Default IP and port to listen on */
280 #define HADDR_DEFAULT "127.0.0.1"
281 #define HADDR_PORT 8000
284 /* Need this for struct client_state */
285 struct configuration_spec;
287 /* Generic linked list of strings */
288 struct list /* FIXME: Why not separate entries and header? */
290 char * str; /* valid in an entry */
291 struct list *last; /* valid in header */
307 char *host_ip_addr_str; /* NULL before connect_to() */
311 char *hostport; /* "host[:port]" */
313 char *user_agent; /* Client's User-Agent: header value */
316 /* Response generated by CGI, blocker, or error handler */
319 char *status; /* HTTP status (string)*/
320 struct list headers[1]; /* List of header lines */
321 char *head; /* Formatted http response head */
322 int head_length; /* Length of http response head */
323 char *body; /* HTTP document body */
324 int content_length; /* Length of body, REQUIRED if binary body*/
330 char *spec; /* The string which was parsed to produce this */
331 /* url_spec. Used for debugging or display only. */
333 /* Hostname matching: */
334 char *domain; /* Fully qalified domain name (FQDN) pattern. */
335 /* May contain "*". */
336 char *dbuf; /* Buffer with '\0'-delimited fqdn */
337 char **dvec; /* Domain ptr vector into dbuf */
338 int dcnt; /* How many domains in fqdn? */
339 int unanchored; /* Bitmap - flags are ANCHOR_LEFT and ANCHOR_RIGHT */
342 int port; /* The port number, or 0 to match all ports. */
345 char *path; /* The path prefix (if not using regex), or source */
347 int pathlen; /* ==strlen(path). Needed for prefix matching. */
349 regex_t *preg; /* Regex for matching path part */
353 /* Constants for host part matching in URLs */
354 #define ANCHOR_LEFT 1
355 #define ANCHOR_RIGHT 2
367 #define IOB_PEEK(CSP) ((CSP->iob->cur > CSP->iob->eod) ? (CSP->iob->eod - CSP->iob->cur) : 0)
368 #define IOB_RESET(CSP) if(CSP->iob->buf) free(CSP->iob->buf); memset(CSP->iob, '\0', sizeof(CSP->iob));
370 /* Keys for csp->content_type */
371 #define CT_TEXT 0x01U
374 #define ACTION_MASK_ALL (~0U)
376 #define ACTION_MOST_COMPATIBLE 0x0000U
378 #define ACTION_BLOCK 0x0001U
379 #define ACTION_DEANIMATE 0x2000U
380 #define ACTION_FAST_REDIRECTS 0x0002U
381 #define ACTION_FILTER 0x0004U
382 #define ACTION_HIDE_FORWARDED 0x0008U
383 #define ACTION_HIDE_FROM 0x0010U
384 #define ACTION_HIDE_REFERER 0x0020U /* sic - follow HTTP, not English */
385 #define ACTION_HIDE_USER_AGENT 0x0040U
386 #define ACTION_IMAGE 0x0080U
387 #define ACTION_IMAGE_BLOCKER 0x0100U
388 #define ACTION_NO_COOKIE_READ 0x0200U
389 #define ACTION_NO_COOKIE_SET 0x0400U
390 #define ACTION_NO_POPUPS 0x0800U
391 #define ACTION_VANILLA_WAFER 0x1000U
393 #define ACTION_STRING_DEANIMATE 0
394 #define ACTION_STRING_FROM 1
395 #define ACTION_STRING_IMAGE_BLOCKER 2
396 #define ACTION_STRING_REFERER 3
397 #define ACTION_STRING_USER_AGENT 4
398 #define ACTION_STRING_COUNT 5
401 #define ACTION_MULTI_ADD_HEADER 0
402 #define ACTION_MULTI_WAFER 1
403 #define ACTION_MULTI_COUNT 2
406 * This structure contains a list of actions to apply to a URL.
407 * It only contains positive instructions - no "-" options.
408 * It is not used to store the actions list itself, only for
409 * url_actions() to return the current values.
411 struct current_action_spec
413 unsigned flags; /* a bit set to "1" = add action */
415 /* For those actions that require parameters: */
417 /* each entry is valid if & only if corresponding entry in "add" set. */
418 char * string[ACTION_STRING_COUNT];
421 struct list multi[ACTION_MULTI_COUNT][1];
426 * This structure contains a set of changes to actions.
427 * It can contain both positive and negative instructions.
428 * It is used to store an entry in the actions list.
432 unsigned mask; /* a bit set to "0" = remove action */
433 unsigned add; /* a bit set to "1" = add action */
435 /* For those actions that require parameters: */
437 /* each entry is valid if & only if corresponding entry in "add" set. */
438 char * string[ACTION_STRING_COUNT];
440 /* Strings to remove. */
441 struct list multi_remove[ACTION_MULTI_COUNT][1];
443 /* If nonzero, remove *all* strings. */
444 int multi_remove_all[ACTION_MULTI_COUNT];
447 struct list multi_add[ACTION_MULTI_COUNT][1];
451 * This structure is used to store the actions list.
453 * It contains a URL pattern, and the chages to the actions.
454 * It is a linked list.
458 struct url_spec url[1];
460 struct action_spec action[1];
462 struct url_actions * next;
466 /* Constants defining bitmask for csp->accept_types */
468 #ifdef DETECT_MSIE_IMAGES
470 /* MSIE detected by user-agent string */
471 #define ACCEPT_TYPE_IS_MSIE 0x0001
474 * *If* this is MSIE, it wants an image. (Or this is a shift-reload, or
475 * it's got an image from this URL before... yuck!)
476 * Only meaningful if ACCEPT_TYPE_IS_MSIE set
478 #define ACCEPT_TYPE_MSIE_IMAGE 0x0002
481 * *If* this is MSIE, it wants a HTML document.
482 * Only meaningful if ACCEPT_TYPE_IS_MSIE set
484 #define ACCEPT_TYPE_MSIE_HTML 0x0004
486 #endif /* def DETECT_MSIE_IMAGES */
491 /* The proxy's configuration */
492 struct configuration_spec * config;
494 /* The actions to perform on the current request */
495 struct current_action_spec action[1];
497 /* socket to talk to client (web browser) */
500 /* socket to talk to server (web server or proxy) */
505 /* 1 if this URL was rejected, 0 otherwise. Allows actual stats inc to
506 * occur in main thread only for thread-safety.
509 #endif /* def STATISTICS */
513 #endif /* def FORCE_LOAD */
517 #endif /* def TOGGLE */
520 * Client PC's IP address, as reported by the accept()_ function.
521 * Both as string and number
527 /* Our IP address and hostname, i.e. the IP address that
528 the client used to reach us, and the associated hostname,
531 char *my_ip_addr_str;
535 /* The referer in this request, if one was specified. */
537 #endif /* def TRUST_FILES */
539 #if defined(DETECT_MSIE_IMAGES)
540 /* Types the client will accept.
541 * Bitmask - see ACCEPT_TYPE_XXX constants.
544 #endif /* defined(DETECT_MSIE_IMAGES) */
546 /* The URL that was requested */
547 struct http_request http[1];
549 /* An I/O buffer used for buffering data read from the client */
552 /* List of all headers for this request */
553 struct list headers[1];
555 /* List of all cookies for this request */
556 struct list cookie_list[1];
558 /* MIME-Type bitmap, see CT_* above */
559 unsigned char content_type;
561 /* The "X-Forwarded-For:" header sent by the client */
565 * Nonzero if this client is processing data.
566 * Set to zero when the thread associated with this structure dies.
570 /* files associated with this client */
571 struct file_list *actions_list;
573 struct file_list *rlist; /* pcrs job file */
574 size_t content_length; /* Length after content modification */
577 struct file_list *tlist; /* trustfile */
578 #endif /* def TRUST_FILES */
580 struct client_state *next;
588 char *(*parser)(const struct parsers *, char *, struct client_state *);
591 struct cgi_dispatcher
595 int (*handler)(struct client_state *csp, struct http_response *rsp, struct map *parameters);
596 const char *description;
602 * this is a pointer to the data structures associated with the file.
603 * Read-only once the structure has been created.
607 /* Normally NULL. When we are finished with file (i.e. when we have
608 * loaded a new one), set to a pointer to an unloader function.
609 * Unloader will be called by sweep() (called from main loop) when
610 * all clients using this file are done. This prevents threading
613 void (*unloader)(void *);
615 /* Used internally by sweep(). Do not access from elsewhere. */
618 #ifndef SPLIT_PROXY_ARGS
619 /* String to be displayed as part of show-proxy-args display.
620 * Read-only once the structure has been created.
623 #endif /* ndef SPLIT_PROXY_ARGS */
625 /* Following variables allow us to check if file has been changed.
626 * Read-only once the structure has been created.
631 /* Pointer to next entry in the linked list of all "file_list"s.
632 * This linked list is so that sweep() can navigate it.
633 * Since sweep() can remove items from the list, we must be careful
634 * to only access this value from main thread (when we know sweep
637 struct file_list *next;
644 struct url_spec url[1];
646 struct block_spec *next;
648 #endif /* def TRUST_FILES */
651 #define SOCKS_NONE 0 /* Don't use a SOCKS server */
652 #define SOCKS_4 40 /* original SOCKS 4 protocol */
653 #define SOCKS_4A 41 /* as modified for hosts w/o external DNS */
657 struct url_spec url[1];
659 /* Connection type - must be a SOCKS_xxx constant */
666 /* Parent HTTP proxy */
670 /* For the linked list */
671 struct forward_spec *next;
674 struct re_filterfile_spec
678 struct list patterns[1];
683 #define ACL_PERMIT 1 /* accept connection request */
684 #define ACL_DENY 2 /* reject connection request */
686 struct access_control_addr
693 struct access_control_list
695 struct access_control_addr src[1];
696 struct access_control_addr dst[1];
699 struct access_control_list *next;
701 #endif /* def ACL_FILES */
704 /* Maximum number of loaders (actions, re_filter, ...) */
708 * Data loaded from the configuration file.
710 * (Anomaly: toggle is still handled through a global, not this structure)
712 struct configuration_spec
721 const char *actions_file;
723 /* The administrator's email address */
726 /* A URL with info on this proxy */
727 char *proxy_info_url;
729 const char *re_filterfile;
732 const char * jarfile;
734 #endif /* def JAR_FILES */
737 * Port and IP to bind to.
738 * Defaults to HADDR_DEFAULT:HADDR_PORT == 127.0.0.1:8000
743 #ifndef SPLIT_PROXY_ARGS
744 const char *suppress_message;
745 #endif /* ndef SPLIT_PROXY_ARGS */
747 #ifndef SPLIT_PROXY_ARGS
748 /* suppress listing config files */
749 int suppress_blocklists;
750 #endif /* ndef SPLIT_PROXY_ARGS */
753 const char * trustfile;
755 struct list trust_info[1];
756 struct url_spec *trust_list[64];
757 #endif /* def TRUST_FILES */
760 struct access_control_list *acl;
761 #endif /* def ACL_FILES */
763 struct forward_spec *forward;
765 /* All options from the config file, HTML-formatted */
768 /* the configuration file object. */
769 struct file_list *config_file_list;
771 /* List of loaders */
772 int (*loaders[NLOADERS])(struct client_state *);
774 /* bool, nonzero if we need to bind() to the new port */
779 #define SZ(X) (sizeof(X) / sizeof(*X))
782 #define FORCE_PREFIX "/IJB-FORCE-LOAD"
783 #endif /* def FORCE_LOAD */
786 #define HOME_PAGE_URL "http://ijbswa.sourceforge.net"
787 #define REDIRECT_URL HOME_PAGE_URL "/redirect.php?v=" VERSION "&to="
788 #define CGI_PREFIX_HOST "i.j.b"
791 static const char CSUCCEED[] =
792 "HTTP/1.0 200 Connection established\n"
793 "Proxy-Agent: IJ/" VERSION "\n\n";
795 static const char CHEADER[] =
796 "HTTP/1.0 400 Invalid header received from browser\n\n";
802 #endif /* ndef _PROJECT_H */