1 const char actions_rcs[] = "$Id: actions.c,v 1.73 2011/09/18 14:43:07 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/actions.c,v $
6 * Purpose : Declares functions to work with actions files
8 * Copyright : Written by and Copyright (C) 2001-2011 the
9 * Privoxy team. http://www.privoxy.org/
11 * Based on the Internet Junkbuster originally written
12 * by and Copyright (C) 1997 Anonymous Coders and
13 * Junkbusters Corporation. http://www.junkbusters.com
15 * This program is free software; you can redistribute it
16 * and/or modify it under the terms of the GNU General
17 * Public License as published by the Free Software
18 * Foundation; either version 2 of the License, or (at
19 * your option) any later version.
21 * This program is distributed in the hope that it will
22 * be useful, but WITHOUT ANY WARRANTY; without even the
23 * implied warranty of MERCHANTABILITY or FITNESS FOR A
24 * PARTICULAR PURPOSE. See the GNU General Public
25 * License for more details.
27 * The GNU General Public License should be included with
28 * this file. If not, you can view it at
29 * http://www.gnu.org/copyleft/gpl.html
30 * or write to the Free Software Foundation, Inc., 59
31 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 *********************************************************************/
43 #ifdef FEATURE_PTHREAD
59 const char actions_h_rcs[] = ACTIONS_H_VERSION;
63 * We need the main list of options.
65 * First, we need a way to tell between boolean, string, and multi-string
66 * options. For string and multistring options, we also need to be
67 * able to tell the difference between a "+" and a "-". (For bools,
68 * the "+"/"-" information is encoded in "add" and "mask"). So we use
69 * an enumerated type (well, the preprocessor equivalent). Here are
72 #define AV_NONE 0 /* +opt -opt */
73 #define AV_ADD_STRING 1 /* +stropt{string} */
74 #define AV_REM_STRING 2 /* -stropt */
75 #define AV_ADD_MULTI 3 /* +multiopt{string} +multiopt{string2} */
76 #define AV_REM_MULTI 4 /* -multiopt{string} -multiopt */
79 * We need a structure to hold the name, flag changes,
80 * type, and string index.
85 unsigned long mask; /* a bit set to "0" = remove action */
86 unsigned long add; /* a bit set to "1" = add action */
87 int takes_value; /* an AV_... constant */
88 int index; /* index into strings[] or multi[] */
92 * And with those building blocks in place, here's the array.
94 static const struct action_name action_names[] =
97 * Well actually there's no data here - it's in actionlist.h
98 * This keeps it together to make it easy to change.
100 * Here's the macros used to format it:
102 #define DEFINE_ACTION_MULTI(name,index) \
103 { "+" name, ACTION_MASK_ALL, 0, AV_ADD_MULTI, index }, \
104 { "-" name, ACTION_MASK_ALL, 0, AV_REM_MULTI, index },
105 #define DEFINE_ACTION_STRING(name,flag,index) \
106 { "+" name, ACTION_MASK_ALL, flag, AV_ADD_STRING, index }, \
107 { "-" name, ~flag, 0, AV_REM_STRING, index },
108 #define DEFINE_ACTION_BOOL(name,flag) \
109 { "+" name, ACTION_MASK_ALL, flag }, \
110 { "-" name, ~flag, 0 },
111 #define DEFINE_ACTION_ALIAS 1 /* Want aliases please */
113 #include "actionlist.h"
115 #undef DEFINE_ACTION_MULTI
116 #undef DEFINE_ACTION_STRING
117 #undef DEFINE_ACTION_BOOL
118 #undef DEFINE_ACTION_ALIAS
120 { NULL, 0, 0 } /* End marker */
124 static int load_one_actions_file(struct client_state *csp, int fileid);
127 /*********************************************************************
129 * Function : merge_actions
131 * Description : Merge two actions together.
132 * Similar to "dest += src".
135 * 1 : dest = Actions to modify.
136 * 2 : src = Action to add.
138 * Returns : JB_ERR_OK or JB_ERR_MEMORY
140 *********************************************************************/
141 jb_err merge_actions (struct action_spec *dest,
142 const struct action_spec *src)
147 dest->mask &= src->mask;
148 dest->add &= src->mask;
149 dest->add |= src->add;
151 for (i = 0; i < ACTION_STRING_COUNT; i++)
153 char * str = src->string[i];
156 freez(dest->string[i]);
157 dest->string[i] = strdup(str);
158 if (NULL == dest->string[i])
160 return JB_ERR_MEMORY;
165 for (i = 0; i < ACTION_MULTI_COUNT; i++)
167 if (src->multi_remove_all[i])
169 /* Remove everything from dest */
170 list_remove_all(dest->multi_remove[i]);
171 dest->multi_remove_all[i] = 1;
173 err = list_duplicate(dest->multi_add[i], src->multi_add[i]);
175 else if (dest->multi_remove_all[i])
178 * dest already removes everything, so we only need to worry
181 list_remove_list(dest->multi_add[i], src->multi_remove[i]);
182 err = list_append_list_unique(dest->multi_add[i], src->multi_add[i]);
186 /* No "remove all"s to worry about. */
187 list_remove_list(dest->multi_add[i], src->multi_remove[i]);
188 err = list_append_list_unique(dest->multi_remove[i], src->multi_remove[i]);
189 if (!err) err = list_append_list_unique(dest->multi_add[i], src->multi_add[i]);
202 /*********************************************************************
204 * Function : copy_action
206 * Description : Copy an action_specs.
207 * Similar to "dest = src".
210 * 1 : dest = Destination of copy.
211 * 2 : src = Source for copy.
215 *********************************************************************/
216 jb_err copy_action (struct action_spec *dest,
217 const struct action_spec *src)
220 jb_err err = JB_ERR_OK;
223 memset(dest, '\0', sizeof(*dest));
225 dest->mask = src->mask;
226 dest->add = src->add;
228 for (i = 0; i < ACTION_STRING_COUNT; i++)
230 char * str = src->string[i];
236 return JB_ERR_MEMORY;
238 dest->string[i] = str;
242 for (i = 0; i < ACTION_MULTI_COUNT; i++)
244 dest->multi_remove_all[i] = src->multi_remove_all[i];
245 err = list_duplicate(dest->multi_remove[i], src->multi_remove[i]);
250 err = list_duplicate(dest->multi_add[i], src->multi_add[i]);
259 /*********************************************************************
261 * Function : free_action_spec
263 * Description : Frees an action_spec and the memory used by it.
266 * 1 : src = Source to free.
270 *********************************************************************/
271 void free_action_spec(struct action_spec *src)
278 /*********************************************************************
280 * Function : free_action
282 * Description : Destroy an action_spec. Frees memory used by it,
283 * except for the memory used by the struct action_spec
287 * 1 : src = Source to free.
291 *********************************************************************/
292 void free_action (struct action_spec *src)
301 for (i = 0; i < ACTION_STRING_COUNT; i++)
303 freez(src->string[i]);
306 for (i = 0; i < ACTION_MULTI_COUNT; i++)
308 destroy_list(src->multi_remove[i]);
309 destroy_list(src->multi_add[i]);
312 memset(src, '\0', sizeof(*src));
316 /*********************************************************************
318 * Function : get_action_token
320 * Description : Parses a line for the first action.
321 * Modifies it's input array, doesn't allocate memory.
323 * *line=" +abc{def} -ghi "
330 * 1 : line = [in] The line containing the action.
331 * [out] Start of next action on line, or
332 * NULL if we reached the end of line before
333 * we found an action.
334 * 2 : name = [out] Start of action name, null
335 * terminated. NULL on EOL
336 * 3 : value = [out] Start of action value, null
337 * terminated. NULL if none or EOL.
339 * Returns : JB_ERR_OK => Ok
340 * JB_ERR_PARSE => Mismatched {} (line was trashed anyway)
342 *********************************************************************/
343 jb_err get_action_token(char **line, char **name, char **value)
348 /* set default returns */
353 /* Eat any leading whitespace */
354 while ((*str == ' ') || (*str == '\t'))
366 /* null name, just value is prohibited */
373 while (((ch = *str) != '\0') &&
374 (ch != ' ') && (ch != '\t') && (ch != '{'))
378 /* error, '}' without '{' */
390 /* EOL - be careful not to run off buffer */
395 /* More to parse next time. */
404 str = strchr(str, '}');
421 /*********************************************************************
423 * Function : action_used_to_be_valid
425 * Description : Checks if unrecognized actions were valid in earlier
429 * 1 : action = The string containing the action to check.
431 * Returns : True if yes, otherwise false.
433 *********************************************************************/
434 static int action_used_to_be_valid(const char *action)
436 static const char * const formerly_valid_actions[] = {
439 "send-vanilla-wafer",
441 "treat-forbidden-connects-like-blocks",
447 for (i = 0; i < SZ(formerly_valid_actions); i++)
449 if (0 == strcmpic(action, formerly_valid_actions[i]))
458 /*********************************************************************
460 * Function : get_actions
462 * Description : Parses a list of actions.
465 * 1 : line = The string containing the actions.
466 * Will be written to by this function.
467 * 2 : alias_list = Custom alias list, or NULL for none.
468 * 3 : cur_action = Where to store the action. Caller
471 * Returns : JB_ERR_OK => Ok
472 * JB_ERR_PARSE => Parse error (line was trashed anyway)
473 * nonzero => Out of memory (line was trashed anyway)
475 *********************************************************************/
476 jb_err get_actions(char *line,
477 struct action_alias * alias_list,
478 struct action_spec *cur_action)
481 init_action(cur_action);
482 cur_action->mask = ACTION_MASK_ALL;
486 char * option = NULL;
489 err = get_action_token(&line, &option, &value);
497 /* handle option in 'option' */
499 /* Check for standard action name */
500 const struct action_name * action = action_names;
502 while ( (action->name != NULL) && (0 != strcmpic(action->name, option)) )
506 if (action->name != NULL)
509 cur_action->mask &= action->mask;
510 cur_action->add &= action->mask;
511 cur_action->add |= action->add;
513 switch (action->takes_value)
516 /* ignore any option. */
520 /* add single string. */
522 if ((value == NULL) || (*value == '\0'))
524 if (0 == strcmpic(action->name, "+block"))
527 * XXX: Temporary backwards compatibility hack.
528 * XXX: should include line number.
530 value = "No reason specified.";
531 log_error(LOG_LEVEL_ERROR,
532 "block action without reason found. This may "
533 "become a fatal error in future versions.");
540 /* FIXME: should validate option string here */
541 freez (cur_action->string[action->index]);
542 cur_action->string[action->index] = strdup(value);
543 if (NULL == cur_action->string[action->index])
545 return JB_ERR_MEMORY;
551 /* remove single string. */
553 freez (cur_action->string[action->index]);
558 /* append multi string. */
560 struct list * remove_p = cur_action->multi_remove[action->index];
561 struct list * add_p = cur_action->multi_add[action->index];
563 if ((value == NULL) || (*value == '\0'))
568 list_remove_item(remove_p, value);
569 err = enlist_unique(add_p, value, 0);
578 /* remove multi string. */
580 struct list * remove_p = cur_action->multi_remove[action->index];
581 struct list * add_p = cur_action->multi_add[action->index];
583 if ( (value == NULL) || (*value == '\0')
584 || ((*value == '*') && (value[1] == '\0')) )
587 * no option, or option == "*".
591 list_remove_all(remove_p);
592 list_remove_all(add_p);
593 cur_action->multi_remove_all[action->index] = 1;
597 /* Valid option - remove only 1 option */
599 if ( !cur_action->multi_remove_all[action->index] )
601 /* there isn't a catch-all in the remove list already */
602 err = enlist_unique(remove_p, value, 0);
608 list_remove_item(add_p, value);
613 /* Shouldn't get here unless there's memory corruption. */
620 /* try user aliases. */
621 const struct action_alias * alias = alias_list;
623 while ( (alias != NULL) && (0 != strcmpic(alias->name, option)) )
630 merge_actions(cur_action, alias->action);
632 else if (((size_t)2 < strlen(option)) && action_used_to_be_valid(option+1))
634 log_error(LOG_LEVEL_ERROR, "Action '%s' is no longer valid "
635 "in this Privoxy release. Ignored.", option+1);
637 else if (((size_t)2 < strlen(option)) && 0 == strcmpic(option+1, "hide-forwarded-for-headers"))
639 log_error(LOG_LEVEL_FATAL, "The action 'hide-forwarded-for-headers' "
640 "is no longer valid in this Privoxy release. "
641 "Use 'change-x-forwarded-for' instead.");
645 /* Bad action name */
647 * XXX: This is a fatal error and Privoxy will later on exit
648 * in load_one_actions_file() because of an "invalid line".
650 * It would be preferable to name the offending option in that
651 * error message, but currently there is no way to do that and
652 * we have to live with two error messages for basically the
655 log_error(LOG_LEVEL_ERROR, "Unknown action or alias: %s", option);
666 /*********************************************************************
668 * Function : init_current_action
670 * Description : Zero out an action.
673 * 1 : dest = An uninitialized current_action_spec.
677 *********************************************************************/
678 void init_current_action (struct current_action_spec *dest)
680 memset(dest, '\0', sizeof(*dest));
682 dest->flags = ACTION_MOST_COMPATIBLE;
686 /*********************************************************************
688 * Function : init_action
690 * Description : Zero out an action.
693 * 1 : dest = An uninitialized action_spec.
697 *********************************************************************/
698 void init_action (struct action_spec *dest)
700 memset(dest, '\0', sizeof(*dest));
704 /*********************************************************************
706 * Function : merge_current_action
708 * Description : Merge two actions together.
709 * Similar to "dest += src".
710 * Differences between this and merge_actions()
711 * is that this one doesn't allocate memory for
712 * strings (so "src" better be in memory for at least
713 * as long as "dest" is, and you'd better free
714 * "dest" using "free_current_action").
715 * Also, there is no mask or remove lists in dest.
716 * (If we're applying it to a URL, we don't need them)
719 * 1 : dest = Current actions, to modify.
720 * 2 : src = Action to add.
722 * Returns 0 : no error
723 * !=0 : error, probably JB_ERR_MEMORY.
725 *********************************************************************/
726 jb_err merge_current_action (struct current_action_spec *dest,
727 const struct action_spec *src)
730 jb_err err = JB_ERR_OK;
732 dest->flags &= src->mask;
733 dest->flags |= src->add;
735 for (i = 0; i < ACTION_STRING_COUNT; i++)
737 char * str = src->string[i];
743 return JB_ERR_MEMORY;
745 freez(dest->string[i]);
746 dest->string[i] = str;
750 for (i = 0; i < ACTION_MULTI_COUNT; i++)
752 if (src->multi_remove_all[i])
754 /* Remove everything from dest, then add src->multi_add */
755 err = list_duplicate(dest->multi[i], src->multi_add[i]);
763 list_remove_list(dest->multi[i], src->multi_remove[i]);
764 err = list_append_list_unique(dest->multi[i], src->multi_add[i]);
775 /*********************************************************************
777 * Function : update_action_bits_for_all_tags
779 * Description : Updates the action bits based on all matching tags.
782 * 1 : csp = Current client state (buffers, headers, etc...)
784 * Returns : 0 if no tag matched, or
787 *********************************************************************/
788 int update_action_bits_for_all_tags(struct client_state *csp)
790 struct list_entry *tag;
793 for (tag = csp->tags->first; tag != NULL; tag = tag->next)
795 if (update_action_bits_for_tag(csp, tag->str))
805 /*********************************************************************
807 * Function : update_action_bits_for_tag
809 * Description : Updates the action bits based on the action sections
810 * whose tag patterns match a provided tag.
813 * 1 : csp = Current client state (buffers, headers, etc...)
814 * 2 : tag = The tag on which the update should be based on
816 * Returns : 0 if no tag matched, or
819 *********************************************************************/
820 int update_action_bits_for_tag(struct client_state *csp, const char *tag)
822 struct file_list *fl;
823 struct url_actions *b;
829 assert(list_contains_item(csp->tags, tag));
831 /* Run through all action files, */
832 for (i = 0; i < MAX_AF_FILES; i++)
834 if (((fl = csp->actions_list[i]) == NULL) || ((b = fl->f) == NULL))
836 /* Skip empty files */
840 /* and through all the action patterns, */
841 for (b = b->next; NULL != b; b = b->next)
843 /* skip the URL patterns, */
844 if (NULL == b->url->tag_regex)
849 /* and check if one of the tag patterns matches the tag, */
850 if (0 == regexec(b->url->tag_regex, tag, 0, NULL, 0))
852 /* if it does, update the action bit map, */
853 if (merge_current_action(csp->action, b->action))
855 log_error(LOG_LEVEL_ERROR,
856 "Out of memory while changing action bits");
858 /* and signal the change. */
868 /*********************************************************************
870 * Function : free_current_action
872 * Description : Free memory used by a current_action_spec.
873 * Does not free the current_action_spec itself.
876 * 1 : src = Source to free.
880 *********************************************************************/
881 void free_current_action(struct current_action_spec *src)
885 for (i = 0; i < ACTION_STRING_COUNT; i++)
887 freez(src->string[i]);
890 for (i = 0; i < ACTION_MULTI_COUNT; i++)
892 destroy_list(src->multi[i]);
895 memset(src, '\0', sizeof(*src));
899 static struct file_list *current_actions_file[MAX_AF_FILES] = {
900 NULL, NULL, NULL, NULL, NULL,
901 NULL, NULL, NULL, NULL, NULL
905 #ifdef FEATURE_GRACEFUL_TERMINATION
906 /*********************************************************************
908 * Function : unload_current_actions_file
910 * Description : Unloads current actions file - reset to state at
911 * beginning of program.
917 *********************************************************************/
918 void unload_current_actions_file(void)
922 for (i = 0; i < MAX_AF_FILES; i++)
924 if (current_actions_file[i])
926 current_actions_file[i]->unloader = unload_actions_file;
927 current_actions_file[i] = NULL;
931 #endif /* FEATURE_GRACEFUL_TERMINATION */
934 /*********************************************************************
936 * Function : unload_actions_file
938 * Description : Unloads an actions module.
941 * 1 : file_data = the data structure associated with the
946 *********************************************************************/
947 void unload_actions_file(void *file_data)
949 struct url_actions * next;
950 struct url_actions * cur = (struct url_actions *)file_data;
954 free_url_spec(cur->url);
955 if ((next == NULL) || (next->action != cur->action))
958 * As the action settings might be shared,
959 * we can only free them if the current
960 * url pattern is the last one, or if the
961 * next one is using different settings.
963 free_action_spec(cur->action);
971 /*********************************************************************
973 * Function : free_alias_list
975 * Description : Free memory used by a list of aliases.
978 * 1 : alias_list = Linked list to free.
982 *********************************************************************/
983 void free_alias_list(struct action_alias *alias_list)
985 while (alias_list != NULL)
987 struct action_alias * next = alias_list->next;
988 alias_list->next = NULL;
989 freez(alias_list->name);
990 free_action(alias_list->action);
997 /*********************************************************************
999 * Function : load_action_files
1001 * Description : Read and parse all the action files and add to files
1005 * 1 : csp = Current client state (buffers, headers, etc...)
1007 * Returns : 0 => Ok, everything else is an error.
1009 *********************************************************************/
1010 int load_action_files(struct client_state *csp)
1015 for (i = 0; i < MAX_AF_FILES; i++)
1017 if (csp->config->actions_file[i])
1019 result = load_one_actions_file(csp, i);
1025 else if (current_actions_file[i])
1027 current_actions_file[i]->unloader = unload_actions_file;
1028 current_actions_file[i] = NULL;
1036 /*********************************************************************
1038 * Function : referenced_filters_are_missing
1040 * Description : Checks if any filters of a certain type referenced
1041 * in an action spec are missing.
1044 * 1 : csp = Current client state (buffers, headers, etc...)
1045 * 2 : cur_action = The action spec to check.
1046 * 3 : multi_index = The index where to look for the filter.
1047 * 4 : filter_type = The filter type the caller is interested in.
1049 * Returns : 0 => All referenced filters exists, everything else is an error.
1051 *********************************************************************/
1052 static int referenced_filters_are_missing(const struct client_state *csp,
1053 const struct action_spec *cur_action, int multi_index, enum filter_type filter_type)
1056 struct file_list *fl;
1057 struct re_filterfile_spec *b;
1058 struct list_entry *filtername;
1060 for (filtername = cur_action->multi_add[multi_index]->first;
1061 filtername; filtername = filtername->next)
1063 int filter_found = 0;
1064 for (i = 0; i < MAX_AF_FILES; i++)
1067 if ((NULL == fl) || (NULL == fl->f))
1072 for (b = fl->f; b; b = b->next)
1074 if (b->type != filter_type)
1078 if (strcmp(b->name, filtername->str) == 0)
1086 log_error(LOG_LEVEL_ERROR, "Missing filter '%s'", filtername->str);
1096 /*********************************************************************
1098 * Function : action_spec_is_valid
1100 * Description : Should eventually figure out if an action spec
1101 * is valid, but currently only checks that the
1102 * referenced filters are accounted for.
1105 * 1 : csp = Current client state (buffers, headers, etc...)
1106 * 2 : cur_action = The action spec to check.
1108 * Returns : 0 => No problems detected, everything else is an error.
1110 *********************************************************************/
1111 static int action_spec_is_valid(struct client_state *csp, const struct action_spec *cur_action)
1115 enum filter_type filter_type;
1117 {ACTION_MULTI_FILTER, FT_CONTENT_FILTER},
1118 {ACTION_MULTI_CLIENT_HEADER_FILTER, FT_CLIENT_HEADER_FILTER},
1119 {ACTION_MULTI_SERVER_HEADER_FILTER, FT_SERVER_HEADER_FILTER},
1120 {ACTION_MULTI_CLIENT_HEADER_TAGGER, FT_CLIENT_HEADER_TAGGER},
1121 {ACTION_MULTI_SERVER_HEADER_TAGGER, FT_SERVER_HEADER_TAGGER}
1126 for (i = 0; i < SZ(filter_map); i++)
1128 errors += referenced_filters_are_missing(csp, cur_action,
1129 filter_map[i].multi_index, filter_map[i].filter_type);
1137 /*********************************************************************
1139 * Function : load_one_actions_file
1141 * Description : Read and parse a action file and add to files
1145 * 1 : csp = Current client state (buffers, headers, etc...)
1146 * 2 : fileid = File index to load.
1148 * Returns : 0 => Ok, everything else is an error.
1150 *********************************************************************/
1151 static int load_one_actions_file(struct client_state *csp, int fileid)
1156 * Note: Keep these in the order they occur in the file, they are
1157 * sometimes tested with <=
1160 MODE_START_OF_FILE = 1,
1162 MODE_DESCRIPTION = 3,
1168 struct url_actions *last_perm;
1169 struct url_actions *perm;
1171 struct file_list *fs;
1172 struct action_spec * cur_action = NULL;
1173 int cur_action_used = 0;
1174 struct action_alias * alias_list = NULL;
1175 unsigned long linenum = 0;
1176 mode = MODE_START_OF_FILE;
1178 if (!check_file_changed(current_actions_file[fileid], csp->config->actions_file[fileid], &fs))
1180 /* No need to load */
1181 csp->actions_list[fileid] = current_actions_file[fileid];
1186 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': %E. "
1187 "Note that beginning with Privoxy 3.0.7, actions files have to be specified "
1188 "with their complete file names.", csp->config->actions_file[fileid]);
1189 return 1; /* never get here */
1192 fs->f = last_perm = (struct url_actions *)zalloc(sizeof(*last_perm));
1193 if (last_perm == NULL)
1195 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': out of memory!",
1196 csp->config->actions_file[fileid]);
1197 return 1; /* never get here */
1200 if ((fp = fopen(csp->config->actions_file[fileid], "r")) == NULL)
1202 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': error opening file: %E",
1203 csp->config->actions_file[fileid]);
1204 return 1; /* never get here */
1207 log_error(LOG_LEVEL_INFO, "Loading actions file: %s", csp->config->actions_file[fileid]);
1209 while (read_config_line(fp, &linenum, &buf) != NULL)
1213 /* It's a header block */
1216 /* It's {{settings}} or {{alias}} */
1217 size_t len = strlen(buf);
1218 char * start = buf + 2;
1219 char * end = buf + len - 1;
1220 if ((len < (size_t)5) || (*end-- != '}') || (*end-- != '}'))
1224 log_error(LOG_LEVEL_FATAL,
1225 "can't load actions file '%s': invalid line (%lu): %s",
1226 csp->config->actions_file[fileid], linenum, buf);
1227 return 1; /* never get here */
1230 /* Trim leading and trailing whitespace. */
1238 log_error(LOG_LEVEL_FATAL,
1239 "can't load actions file '%s': invalid line (%lu): {{ }}",
1240 csp->config->actions_file[fileid], linenum);
1241 return 1; /* never get here */
1245 * An actionsfile can optionally contain the following blocks.
1246 * They *MUST* be in this order, to simplify processing:
1252 * ...free text, format TBD, but no line may start with a '{'...
1257 * The actual actions must be *after* these special blocks.
1258 * None of these special blocks may be repeated.
1261 if (0 == strcmpic(start, "settings"))
1263 /* it's a {{settings}} block */
1264 if (mode >= MODE_SETTINGS)
1266 /* {{settings}} must be first thing in file and must only
1270 log_error(LOG_LEVEL_FATAL,
1271 "can't load actions file '%s': line %lu: {{settings}} must only appear once, and it must be before anything else.",
1272 csp->config->actions_file[fileid], linenum);
1274 mode = MODE_SETTINGS;
1276 else if (0 == strcmpic(start, "description"))
1278 /* it's a {{description}} block */
1279 if (mode >= MODE_DESCRIPTION)
1281 /* {{description}} is a singleton and only {{settings}} may proceed it
1284 log_error(LOG_LEVEL_FATAL,
1285 "can't load actions file '%s': line %lu: {{description}} must only appear once, and only a {{settings}} block may be above it.",
1286 csp->config->actions_file[fileid], linenum);
1288 mode = MODE_DESCRIPTION;
1290 else if (0 == strcmpic(start, "alias"))
1292 /* it's an {{alias}} block */
1293 if (mode >= MODE_ALIAS)
1295 /* {{alias}} must be first thing in file, possibly after
1296 * {{settings}} and {{description}}
1298 * {{alias}} must only appear once.
1300 * Note that these are new restrictions introduced in
1301 * v2.9.10 in order to make actionsfile editing simpler.
1302 * (Otherwise, reordering actionsfile entries without
1303 * completely rewriting the file becomes non-trivial)
1306 log_error(LOG_LEVEL_FATAL,
1307 "can't load actions file '%s': line %lu: {{alias}} must only appear once, and it must be before all actions.",
1308 csp->config->actions_file[fileid], linenum);
1314 /* invalid {{something}} block */
1316 log_error(LOG_LEVEL_FATAL,
1317 "can't load actions file '%s': invalid line (%lu): {{%s}}",
1318 csp->config->actions_file[fileid], linenum, start);
1319 return 1; /* never get here */
1324 /* It's an actions block */
1330 mode = MODE_ACTIONS;
1332 /* free old action */
1335 if (!cur_action_used)
1337 free_action_spec(cur_action);
1341 cur_action_used = 0;
1342 cur_action = (struct action_spec *)zalloc(sizeof(*cur_action));
1343 if (cur_action == NULL)
1346 log_error(LOG_LEVEL_FATAL,
1347 "can't load actions file '%s': out of memory",
1348 csp->config->actions_file[fileid]);
1349 return 1; /* never get here */
1351 init_action(cur_action);
1354 * Copy the buffer before messing with it as we may need the
1355 * unmodified version in for the fatal error messages. Given
1356 * that this is not a common event, we could instead simply
1357 * read the line again.
1359 * buf + 1 to skip the leading '{'
1361 actions_buf = strdup(buf + 1);
1362 if (actions_buf == NULL)
1365 log_error(LOG_LEVEL_FATAL,
1366 "can't load actions file '%s': out of memory",
1367 csp->config->actions_file[fileid]);
1368 return 1; /* never get here */
1371 /* check we have a trailing } and then trim it */
1372 end = actions_buf + strlen(actions_buf) - 1;
1378 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': "
1379 "Missing trailing '}' in action section starting at line (%lu): %s",
1380 csp->config->actions_file[fileid], linenum, buf);
1381 return 1; /* never get here */
1385 /* trim any whitespace immediately inside {} */
1388 if (get_actions(actions_buf, alias_list, cur_action))
1393 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': "
1394 "can't completely parse the action section starting at line (%lu): %s",
1395 csp->config->actions_file[fileid], linenum, buf);
1396 return 1; /* never get here */
1399 if (action_spec_is_valid(csp, cur_action))
1401 log_error(LOG_LEVEL_ERROR, "Invalid action section in file '%s', "
1402 "starting at line %lu: %s",
1403 csp->config->actions_file[fileid], linenum, buf);
1409 else if (mode == MODE_SETTINGS)
1412 * Part of the {{settings}} block.
1413 * For now only serves to check if the file's minimum Privoxy
1414 * version requirement is met, but we may want to read & check
1415 * permissions when we go multi-user.
1417 if (!strncmp(buf, "for-privoxy-version=", 20))
1419 char *version_string, *fields[3];
1422 if ((version_string = strdup(buf + 20)) == NULL)
1425 log_error(LOG_LEVEL_FATAL,
1426 "can't load actions file '%s': out of memory!",
1427 csp->config->actions_file[fileid]);
1428 return 1; /* never get here */
1431 num_fields = ssplit(version_string, ".", fields, SZ(fields), TRUE, FALSE);
1433 if (num_fields < 1 || atoi(fields[0]) == 0)
1435 log_error(LOG_LEVEL_ERROR,
1436 "While loading actions file '%s': invalid line (%lu): %s",
1437 csp->config->actions_file[fileid], linenum, buf);
1439 else if ( atoi(fields[0]) > VERSION_MAJOR
1440 || (num_fields > 1 && atoi(fields[1]) > VERSION_MINOR)
1441 || (num_fields > 2 && atoi(fields[2]) > VERSION_POINT))
1444 log_error(LOG_LEVEL_FATAL,
1445 "Actions file '%s', line %lu requires newer Privoxy version: %s",
1446 csp->config->actions_file[fileid], linenum, buf );
1447 return 1; /* never get here */
1449 free(version_string);
1452 else if (mode == MODE_DESCRIPTION)
1455 * Part of the {{description}} block.
1459 else if (mode == MODE_ALIAS)
1464 char actions_buf[BUFFER_SIZE];
1465 struct action_alias * new_alias;
1467 char * start = strchr(buf, '=');
1470 if ((start == NULL) || (start == buf))
1472 log_error(LOG_LEVEL_FATAL,
1473 "can't load actions file '%s': invalid alias line (%lu): %s",
1474 csp->config->actions_file[fileid], linenum, buf);
1475 return 1; /* never get here */
1478 if ((new_alias = zalloc(sizeof(*new_alias))) == NULL)
1481 log_error(LOG_LEVEL_FATAL,
1482 "can't load actions file '%s': out of memory!",
1483 csp->config->actions_file[fileid]);
1484 return 1; /* never get here */
1487 /* Eat any the whitespace before the '=' */
1489 while ((*end == ' ') || (*end == '\t'))
1492 * we already know we must have at least 1 non-ws char
1493 * at start of buf - no need to check
1499 /* Eat any the whitespace after the '=' */
1501 while ((*start == ' ') || (*start == '\t'))
1507 log_error(LOG_LEVEL_FATAL,
1508 "can't load actions file '%s': invalid alias line (%lu): %s",
1509 csp->config->actions_file[fileid], linenum, buf);
1510 return 1; /* never get here */
1513 if ((new_alias->name = strdup(buf)) == NULL)
1516 log_error(LOG_LEVEL_FATAL,
1517 "can't load actions file '%s': out of memory!",
1518 csp->config->actions_file[fileid]);
1519 return 1; /* never get here */
1522 strlcpy(actions_buf, start, sizeof(actions_buf));
1524 if (get_actions(actions_buf, alias_list, new_alias->action))
1528 log_error(LOG_LEVEL_FATAL,
1529 "can't load actions file '%s': invalid alias line (%lu): %s = %s",
1530 csp->config->actions_file[fileid], linenum, buf, start);
1531 return 1; /* never get here */
1535 new_alias->next = alias_list;
1536 alias_list = new_alias;
1538 else if (mode == MODE_ACTIONS)
1540 /* it's an URL pattern */
1542 /* allocate a new node */
1543 if ((perm = zalloc(sizeof(*perm))) == NULL)
1546 log_error(LOG_LEVEL_FATAL,
1547 "can't load actions file '%s': out of memory!",
1548 csp->config->actions_file[fileid]);
1549 return 1; /* never get here */
1552 perm->action = cur_action;
1553 cur_action_used = 1;
1555 /* Save the URL pattern */
1556 if (create_url_spec(perm->url, buf))
1559 log_error(LOG_LEVEL_FATAL,
1560 "can't load actions file '%s': line %lu: cannot create URL or TAG pattern from: %s",
1561 csp->config->actions_file[fileid], linenum, buf);
1562 return 1; /* never get here */
1565 /* add it to the list */
1566 last_perm->next = perm;
1569 else if (mode == MODE_START_OF_FILE)
1571 /* oops - please have a {} line as 1st line in file. */
1573 log_error(LOG_LEVEL_FATAL,
1574 "can't load actions file '%s': line %lu should begin with a '{': %s",
1575 csp->config->actions_file[fileid], linenum, buf);
1576 return 1; /* never get here */
1580 /* How did we get here? This is impossible! */
1582 log_error(LOG_LEVEL_FATAL,
1583 "can't load actions file '%s': INTERNAL ERROR - mode = %d",
1584 csp->config->actions_file[fileid], mode);
1585 return 1; /* never get here */
1592 if (!cur_action_used)
1594 free_action_spec(cur_action);
1596 free_alias_list(alias_list);
1598 /* the old one is now obsolete */
1599 if (current_actions_file[fileid])
1601 current_actions_file[fileid]->unloader = unload_actions_file;
1604 fs->next = files->next;
1606 current_actions_file[fileid] = fs;
1608 csp->actions_list[fileid] = fs;
1615 /*********************************************************************
1617 * Function : actions_to_text
1619 * Description : Converts a actionsfile entry from the internal
1620 * structure into a text line. The output is split
1621 * into one line for each action with line continuation.
1624 * 1 : action = The action to format.
1626 * Returns : A string. Caller must free it.
1627 * NULL on out-of-memory error.
1629 *********************************************************************/
1630 char * actions_to_text(const struct action_spec *action)
1632 unsigned long mask = action->mask;
1633 unsigned long add = action->add;
1634 char *result = strdup("");
1635 struct list_entry * lst;
1637 /* sanity - prevents "-feature +feature" */
1641 #define DEFINE_ACTION_BOOL(__name, __bit) \
1642 if (!(mask & __bit)) \
1644 string_append(&result, " -" __name " \\\n"); \
1646 else if (add & __bit) \
1648 string_append(&result, " +" __name " \\\n"); \
1651 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1652 if (!(mask & __bit)) \
1654 string_append(&result, " -" __name " \\\n"); \
1656 else if (add & __bit) \
1658 string_append(&result, " +" __name "{"); \
1659 string_append(&result, action->string[__index]); \
1660 string_append(&result, "} \\\n"); \
1663 #define DEFINE_ACTION_MULTI(__name, __index) \
1664 if (action->multi_remove_all[__index]) \
1666 string_append(&result, " -" __name " \\\n"); \
1670 lst = action->multi_remove[__index]->first; \
1673 string_append(&result, " -" __name "{"); \
1674 string_append(&result, lst->str); \
1675 string_append(&result, "} \\\n"); \
1679 lst = action->multi_add[__index]->first; \
1682 string_append(&result, " +" __name "{"); \
1683 string_append(&result, lst->str); \
1684 string_append(&result, "} \\\n"); \
1688 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1690 #include "actionlist.h"
1692 #undef DEFINE_ACTION_MULTI
1693 #undef DEFINE_ACTION_STRING
1694 #undef DEFINE_ACTION_BOOL
1695 #undef DEFINE_ACTION_ALIAS
1701 /*********************************************************************
1703 * Function : actions_to_html
1705 * Description : Converts a actionsfile entry from numeric form
1706 * ("mask" and "add") to a <br>-separated HTML string
1707 * in which each action is linked to its chapter in
1711 * 1 : csp = Client state (for config)
1712 * 2 : action = Action spec to be converted
1714 * Returns : A string. Caller must free it.
1715 * NULL on out-of-memory error.
1717 *********************************************************************/
1718 char * actions_to_html(const struct client_state *csp,
1719 const struct action_spec *action)
1721 unsigned long mask = action->mask;
1722 unsigned long add = action->add;
1723 char *result = strdup("");
1724 struct list_entry * lst;
1726 /* sanity - prevents "-feature +feature" */
1730 #define DEFINE_ACTION_BOOL(__name, __bit) \
1731 if (!(mask & __bit)) \
1733 string_append(&result, "\n<br>-"); \
1734 string_join(&result, add_help_link(__name, csp->config)); \
1736 else if (add & __bit) \
1738 string_append(&result, "\n<br>+"); \
1739 string_join(&result, add_help_link(__name, csp->config)); \
1742 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1743 if (!(mask & __bit)) \
1745 string_append(&result, "\n<br>-"); \
1746 string_join(&result, add_help_link(__name, csp->config)); \
1748 else if (add & __bit) \
1750 string_append(&result, "\n<br>+"); \
1751 string_join(&result, add_help_link(__name, csp->config)); \
1752 string_append(&result, "{"); \
1753 string_join(&result, html_encode(action->string[__index])); \
1754 string_append(&result, "}"); \
1757 #define DEFINE_ACTION_MULTI(__name, __index) \
1758 if (action->multi_remove_all[__index]) \
1760 string_append(&result, "\n<br>-"); \
1761 string_join(&result, add_help_link(__name, csp->config)); \
1765 lst = action->multi_remove[__index]->first; \
1768 string_append(&result, "\n<br>-"); \
1769 string_join(&result, add_help_link(__name, csp->config)); \
1770 string_append(&result, "{"); \
1771 string_join(&result, html_encode(lst->str)); \
1772 string_append(&result, "}"); \
1776 lst = action->multi_add[__index]->first; \
1779 string_append(&result, "\n<br>+"); \
1780 string_join(&result, add_help_link(__name, csp->config)); \
1781 string_append(&result, "{"); \
1782 string_join(&result, html_encode(lst->str)); \
1783 string_append(&result, "}"); \
1787 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1789 #include "actionlist.h"
1791 #undef DEFINE_ACTION_MULTI
1792 #undef DEFINE_ACTION_STRING
1793 #undef DEFINE_ACTION_BOOL
1794 #undef DEFINE_ACTION_ALIAS
1796 /* trim leading <br> */
1797 if (result && *result)
1800 result = strdup(result + 5);
1808 /*********************************************************************
1810 * Function : current_actions_to_html
1812 * Description : Converts a curren action spec to a <br> separated HTML
1813 * text in which each action is linked to its chapter in
1817 * 1 : csp = Client state (for config)
1818 * 2 : action = Current action spec to be converted
1820 * Returns : A string. Caller must free it.
1821 * NULL on out-of-memory error.
1823 *********************************************************************/
1824 char *current_action_to_html(const struct client_state *csp,
1825 const struct current_action_spec *action)
1827 unsigned long flags = action->flags;
1828 struct list_entry * lst;
1829 char *result = strdup("");
1830 char *active = strdup("");
1831 char *inactive = strdup("");
1833 #define DEFINE_ACTION_BOOL(__name, __bit) \
1834 if (flags & __bit) \
1836 string_append(&active, "\n<br>+"); \
1837 string_join(&active, add_help_link(__name, csp->config)); \
1841 string_append(&inactive, "\n<br>-"); \
1842 string_join(&inactive, add_help_link(__name, csp->config)); \
1845 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1846 if (flags & __bit) \
1848 string_append(&active, "\n<br>+"); \
1849 string_join(&active, add_help_link(__name, csp->config)); \
1850 string_append(&active, "{"); \
1851 string_join(&active, html_encode(action->string[__index])); \
1852 string_append(&active, "}"); \
1856 string_append(&inactive, "\n<br>-"); \
1857 string_join(&inactive, add_help_link(__name, csp->config)); \
1860 #define DEFINE_ACTION_MULTI(__name, __index) \
1861 lst = action->multi[__index]->first; \
1864 string_append(&inactive, "\n<br>-"); \
1865 string_join(&inactive, add_help_link(__name, csp->config)); \
1871 string_append(&active, "\n<br>+"); \
1872 string_join(&active, add_help_link(__name, csp->config)); \
1873 string_append(&active, "{"); \
1874 string_join(&active, html_encode(lst->str)); \
1875 string_append(&active, "}"); \
1880 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1882 #include "actionlist.h"
1884 #undef DEFINE_ACTION_MULTI
1885 #undef DEFINE_ACTION_STRING
1886 #undef DEFINE_ACTION_BOOL
1887 #undef DEFINE_ACTION_ALIAS
1891 string_append(&result, active);
1894 string_append(&result, "\n<br>");
1895 if (inactive != NULL)
1897 string_append(&result, inactive);