1 const char actions_rcs[] = "$Id: actions.c,v 1.96 2016/02/26 12:29:38 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) 2001-2016 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
60 const char actions_h_rcs[] = ACTIONS_H_VERSION;
64 * We need the main list of options.
66 * First, we need a way to tell between boolean, string, and multi-string
67 * options. For string and multistring options, we also need to be
68 * able to tell the difference between a "+" and a "-". (For bools,
69 * the "+"/"-" information is encoded in "add" and "mask"). So we use
70 * an enumerated type (well, the preprocessor equivalent). Here are
73 enum action_value_type {
74 AV_NONE = 0, /* +opt -opt */
75 AV_ADD_STRING = 1, /* +stropt{string} */
76 AV_REM_STRING = 2, /* -stropt */
77 AV_ADD_MULTI = 3, /* +multiopt{string} +multiopt{string2} */
78 AV_REM_MULTI = 4 /* -multiopt{string} -multiopt */
82 * We need a structure to hold the name, flag changes,
83 * type, and string index.
88 unsigned long mask; /* a bit set to "0" = remove action */
89 unsigned long add; /* a bit set to "1" = add action */
90 enum action_value_type value_type; /* an AV_... constant */
91 int index; /* index into strings[] or multi[] */
95 * And with those building blocks in place, here's the array.
97 static const struct action_name action_names[] =
100 * Well actually there's no data here - it's in actionlist.h
101 * This keeps it together to make it easy to change.
103 * Here's the macros used to format it:
105 #define DEFINE_ACTION_MULTI(name,index) \
106 { "+" name, ACTION_MASK_ALL, 0, AV_ADD_MULTI, index }, \
107 { "-" name, ACTION_MASK_ALL, 0, AV_REM_MULTI, index },
108 #define DEFINE_ACTION_STRING(name,flag,index) \
109 { "+" name, ACTION_MASK_ALL, flag, AV_ADD_STRING, index }, \
110 { "-" name, ~flag, 0, AV_REM_STRING, index },
111 #define DEFINE_ACTION_BOOL(name,flag) \
112 { "+" name, ACTION_MASK_ALL, flag }, \
113 { "-" name, ~flag, 0 },
114 #define DEFINE_ACTION_ALIAS 1 /* Want aliases please */
116 #include "actionlist.h"
118 #undef DEFINE_ACTION_MULTI
119 #undef DEFINE_ACTION_STRING
120 #undef DEFINE_ACTION_BOOL
121 #undef DEFINE_ACTION_ALIAS
123 { NULL, 0, 0 } /* End marker */
127 static int load_one_actions_file(struct client_state *csp, int fileid);
130 /*********************************************************************
132 * Function : merge_actions
134 * Description : Merge two actions together.
135 * Similar to "dest += src".
138 * 1 : dest = Actions to modify.
139 * 2 : src = Action to add.
141 * Returns : JB_ERR_OK or JB_ERR_MEMORY
143 *********************************************************************/
144 jb_err merge_actions (struct action_spec *dest,
145 const struct action_spec *src)
150 dest->mask &= src->mask;
151 dest->add &= src->mask;
152 dest->add |= src->add;
154 for (i = 0; i < ACTION_STRING_COUNT; i++)
156 char * str = src->string[i];
159 freez(dest->string[i]);
160 dest->string[i] = strdup_or_die(str);
164 for (i = 0; i < ACTION_MULTI_COUNT; i++)
166 if (src->multi_remove_all[i])
168 /* Remove everything from dest */
169 list_remove_all(dest->multi_remove[i]);
170 dest->multi_remove_all[i] = 1;
172 err = list_duplicate(dest->multi_add[i], src->multi_add[i]);
174 else if (dest->multi_remove_all[i])
177 * dest already removes everything, so we only need to worry
180 list_remove_list(dest->multi_add[i], src->multi_remove[i]);
181 err = list_append_list_unique(dest->multi_add[i], src->multi_add[i]);
185 /* No "remove all"s to worry about. */
186 list_remove_list(dest->multi_add[i], src->multi_remove[i]);
187 err = list_append_list_unique(dest->multi_remove[i], src->multi_remove[i]);
188 if (!err) err = list_append_list_unique(dest->multi_add[i], src->multi_add[i]);
201 /*********************************************************************
203 * Function : copy_action
205 * Description : Copy an action_specs.
206 * Similar to "dest = src".
209 * 1 : dest = Destination of copy.
210 * 2 : src = Source for copy.
212 * Returns : JB_ERR_OK or JB_ERR_MEMORY
214 *********************************************************************/
215 jb_err copy_action (struct action_spec *dest,
216 const struct action_spec *src)
219 jb_err err = JB_ERR_OK;
222 memset(dest, '\0', sizeof(*dest));
224 dest->mask = src->mask;
225 dest->add = src->add;
227 for (i = 0; i < ACTION_STRING_COUNT; i++)
229 char * str = src->string[i];
232 str = strdup_or_die(str);
233 dest->string[i] = str;
237 for (i = 0; i < ACTION_MULTI_COUNT; i++)
239 dest->multi_remove_all[i] = src->multi_remove_all[i];
240 err = list_duplicate(dest->multi_remove[i], src->multi_remove[i]);
245 err = list_duplicate(dest->multi_add[i], src->multi_add[i]);
254 /*********************************************************************
256 * Function : free_action_spec
258 * Description : Frees an action_spec and the memory used by it.
261 * 1 : src = Source to free.
265 *********************************************************************/
266 void free_action_spec(struct action_spec *src)
273 /*********************************************************************
275 * Function : free_action
277 * Description : Destroy an action_spec. Frees memory used by it,
278 * except for the memory used by the struct action_spec
282 * 1 : src = Source to free.
286 *********************************************************************/
287 void free_action (struct action_spec *src)
296 for (i = 0; i < ACTION_STRING_COUNT; i++)
298 freez(src->string[i]);
301 for (i = 0; i < ACTION_MULTI_COUNT; i++)
303 destroy_list(src->multi_remove[i]);
304 destroy_list(src->multi_add[i]);
307 memset(src, '\0', sizeof(*src));
311 /*********************************************************************
313 * Function : get_action_token
315 * Description : Parses a line for the first action.
316 * Modifies its input array, doesn't allocate memory.
318 * *line=" +abc{def} -ghi "
325 * 1 : line = [in] The line containing the action.
326 * [out] Start of next action on line, or
327 * NULL if we reached the end of line before
328 * we found an action.
329 * 2 : name = [out] Start of action name, null
330 * terminated. NULL on EOL
331 * 3 : value = [out] Start of action value, null
332 * terminated. NULL if none or EOL.
334 * Returns : JB_ERR_OK => Ok
335 * JB_ERR_PARSE => Mismatched {} (line was trashed anyway)
337 *********************************************************************/
338 jb_err get_action_token(char **line, char **name, char **value)
343 /* set default returns */
348 /* Eat any leading whitespace */
349 while ((*str == ' ') || (*str == '\t'))
361 /* null name, just value is prohibited */
368 while (((ch = *str) != '\0') &&
369 (ch != ' ') && (ch != '\t') && (ch != '{'))
373 /* error, '}' without '{' */
385 /* EOL - be careful not to run off buffer */
390 /* More to parse next time. */
399 /* The value ends with the first non-escaped closing curly brace */
400 while ((str = strchr(str, '}')) != NULL)
404 /* Overwrite the '\' so the action doesn't see it. */
405 string_move(str-1, str);
426 /*********************************************************************
428 * Function : action_used_to_be_valid
430 * Description : Checks if unrecognized actions were valid in earlier
434 * 1 : action = The string containing the action to check.
436 * Returns : True if yes, otherwise false.
438 *********************************************************************/
439 static int action_used_to_be_valid(const char *action)
441 static const char * const formerly_valid_actions[] = {
444 "send-vanilla-wafer",
446 "treat-forbidden-connects-like-blocks",
452 for (i = 0; i < SZ(formerly_valid_actions); i++)
454 if (0 == strcmpic(action, formerly_valid_actions[i]))
463 /*********************************************************************
465 * Function : get_actions
467 * Description : Parses a list of actions.
470 * 1 : line = The string containing the actions.
471 * Will be written to by this function.
472 * 2 : alias_list = Custom alias list, or NULL for none.
473 * 3 : cur_action = Where to store the action. Caller
476 * Returns : JB_ERR_OK => Ok
477 * JB_ERR_PARSE => Parse error (line was trashed anyway)
478 * nonzero => Out of memory (line was trashed anyway)
480 *********************************************************************/
481 jb_err get_actions(char *line,
482 struct action_alias * alias_list,
483 struct action_spec *cur_action)
486 init_action(cur_action);
487 cur_action->mask = ACTION_MASK_ALL;
491 char * option = NULL;
494 err = get_action_token(&line, &option, &value);
502 /* handle option in 'option' */
504 /* Check for standard action name */
505 const struct action_name * action = action_names;
507 while ((action->name != NULL) && (0 != strcmpic(action->name, option)))
511 if (action->name != NULL)
514 cur_action->mask &= action->mask;
515 cur_action->add &= action->mask;
516 cur_action->add |= action->add;
518 switch (action->value_type)
523 log_error(LOG_LEVEL_ERROR,
524 "Action %s does not take parameters but %s was given.",
525 action->name, value);
531 /* add single string. */
533 if ((value == NULL) || (*value == '\0'))
535 if (0 == strcmpic(action->name, "+block"))
538 * XXX: Temporary backwards compatibility hack.
539 * XXX: should include line number.
541 value = "No reason specified.";
542 log_error(LOG_LEVEL_ERROR,
543 "block action without reason found. This may "
544 "become a fatal error in future versions.");
551 /* FIXME: should validate option string here */
552 freez (cur_action->string[action->index]);
553 cur_action->string[action->index] = strdup(value);
554 if (NULL == cur_action->string[action->index])
556 return JB_ERR_MEMORY;
562 /* remove single string. */
564 freez (cur_action->string[action->index]);
569 /* append multi string. */
571 struct list * remove_p = cur_action->multi_remove[action->index];
572 struct list * add_p = cur_action->multi_add[action->index];
574 if ((value == NULL) || (*value == '\0'))
579 list_remove_item(remove_p, value);
580 err = enlist_unique(add_p, value, 0);
589 /* remove multi string. */
591 struct list * remove_p = cur_action->multi_remove[action->index];
592 struct list * add_p = cur_action->multi_add[action->index];
594 if ((value == NULL) || (*value == '\0')
595 || ((*value == '*') && (value[1] == '\0')))
598 * no option, or option == "*".
602 list_remove_all(remove_p);
603 list_remove_all(add_p);
604 cur_action->multi_remove_all[action->index] = 1;
608 /* Valid option - remove only 1 option */
610 if (!cur_action->multi_remove_all[action->index])
612 /* there isn't a catch-all in the remove list already */
613 err = enlist_unique(remove_p, value, 0);
619 list_remove_item(add_p, value);
624 /* Shouldn't get here unless there's memory corruption. */
631 /* try user aliases. */
632 const struct action_alias * alias = alias_list;
634 while ((alias != NULL) && (0 != strcmpic(alias->name, option)))
641 merge_actions(cur_action, alias->action);
643 else if (((size_t)2 < strlen(option)) && action_used_to_be_valid(option+1))
645 log_error(LOG_LEVEL_ERROR, "Action '%s' is no longer valid "
646 "in this Privoxy release. Ignored.", option+1);
648 else if (((size_t)2 < strlen(option)) && 0 == strcmpic(option+1, "hide-forwarded-for-headers"))
650 log_error(LOG_LEVEL_FATAL, "The action 'hide-forwarded-for-headers' "
651 "is no longer valid in this Privoxy release. "
652 "Use 'change-x-forwarded-for' instead.");
656 /* Bad action name */
658 * XXX: This is a fatal error and Privoxy will later on exit
659 * in load_one_actions_file() because of an "invalid line".
661 * It would be preferable to name the offending option in that
662 * error message, but currently there is no way to do that and
663 * we have to live with two error messages for basically the
666 log_error(LOG_LEVEL_ERROR, "Unknown action or alias: %s", option);
677 /*********************************************************************
679 * Function : init_current_action
681 * Description : Zero out an action.
684 * 1 : dest = An uninitialized current_action_spec.
688 *********************************************************************/
689 void init_current_action (struct current_action_spec *dest)
691 memset(dest, '\0', sizeof(*dest));
693 dest->flags = ACTION_MOST_COMPATIBLE;
697 /*********************************************************************
699 * Function : init_action
701 * Description : Zero out an action.
704 * 1 : dest = An uninitialized action_spec.
708 *********************************************************************/
709 void init_action (struct action_spec *dest)
711 memset(dest, '\0', sizeof(*dest));
715 /*********************************************************************
717 * Function : merge_current_action
719 * Description : Merge two actions together.
720 * Similar to "dest += src".
721 * Differences between this and merge_actions()
722 * is that this one doesn't allocate memory for
723 * strings (so "src" better be in memory for at least
724 * as long as "dest" is, and you'd better free
725 * "dest" using "free_current_action").
726 * Also, there is no mask or remove lists in dest.
727 * (If we're applying it to a URL, we don't need them)
730 * 1 : dest = Current actions, to modify.
731 * 2 : src = Action to add.
733 * Returns 0 : no error
734 * !=0 : error, probably JB_ERR_MEMORY.
736 *********************************************************************/
737 jb_err merge_current_action (struct current_action_spec *dest,
738 const struct action_spec *src)
741 jb_err err = JB_ERR_OK;
743 dest->flags &= src->mask;
744 dest->flags |= src->add;
746 for (i = 0; i < ACTION_STRING_COUNT; i++)
748 char * str = src->string[i];
751 str = strdup_or_die(str);
752 freez(dest->string[i]);
753 dest->string[i] = str;
757 for (i = 0; i < ACTION_MULTI_COUNT; i++)
759 if (src->multi_remove_all[i])
761 /* Remove everything from dest, then add src->multi_add */
762 err = list_duplicate(dest->multi[i], src->multi_add[i]);
770 list_remove_list(dest->multi[i], src->multi_remove[i]);
771 err = list_append_list_unique(dest->multi[i], src->multi_add[i]);
782 /*********************************************************************
784 * Function : update_action_bits_for_tag
786 * Description : Updates the action bits based on the action sections
787 * whose tag patterns match a provided tag.
790 * 1 : csp = Current client state (buffers, headers, etc...)
791 * 2 : tag = The tag on which the update should be based on
793 * Returns : 0 if no tag matched, or
796 *********************************************************************/
797 int update_action_bits_for_tag(struct client_state *csp, const char *tag)
799 struct file_list *fl;
800 struct url_actions *b;
806 assert(list_contains_item(csp->tags, tag));
808 /* Run through all action files, */
809 for (i = 0; i < MAX_AF_FILES; i++)
811 if (((fl = csp->actions_list[i]) == NULL) || ((b = fl->f) == NULL))
813 /* Skip empty files */
817 /* and through all the action patterns, */
818 for (b = b->next; NULL != b; b = b->next)
820 /* skip everything but TAG patterns, */
821 if (!(b->url->flags & PATTERN_SPEC_TAG_PATTERN))
826 /* and check if one of the tag patterns matches the tag, */
827 if (0 == regexec(b->url->pattern.tag_regex, tag, 0, NULL, 0))
829 /* if it does, update the action bit map, */
830 if (merge_current_action(csp->action, b->action))
832 log_error(LOG_LEVEL_ERROR,
833 "Out of memory while changing action bits");
835 /* and signal the change. */
845 /*********************************************************************
847 * Function : check_negative_tag_patterns
849 * Description : Updates the action bits based on NO-*-TAG patterns.
852 * 1 : csp = Current client state (buffers, headers, etc...)
853 * 2 : flag = The tag pattern type
855 * Returns : JB_ERR_OK in case off success, or
856 * JB_ERR_MEMORY on out-of-memory error.
858 *********************************************************************/
859 jb_err check_negative_tag_patterns(struct client_state *csp, unsigned int flag)
861 struct list_entry *tag;
862 struct file_list *fl;
863 struct url_actions *b = NULL;
866 for (i = 0; i < MAX_AF_FILES; i++)
868 fl = csp->actions_list[i];
869 if ((fl == NULL) || ((b = fl->f) == NULL))
873 for (b = b->next; NULL != b; b = b->next)
876 if (0 == (b->url->flags & flag))
880 for (tag = csp->tags->first; NULL != tag; tag = tag->next)
882 if (0 == regexec(b->url->pattern.tag_regex, tag->str, 0, NULL, 0))
885 * The pattern matches at least one tag, thus the action
886 * section doesn't apply and we don't need to look at the
896 * The pattern doesn't match any tags,
897 * thus the action section applies.
899 if (merge_current_action(csp->action, b->action))
901 log_error(LOG_LEVEL_ERROR,
902 "Out of memory while changing action bits");
903 return JB_ERR_MEMORY;
905 log_error(LOG_LEVEL_HEADER, "Updated action bits based on: %s",
915 /*********************************************************************
917 * Function : free_current_action
919 * Description : Free memory used by a current_action_spec.
920 * Does not free the current_action_spec itself.
923 * 1 : src = Source to free.
927 *********************************************************************/
928 void free_current_action(struct current_action_spec *src)
932 for (i = 0; i < ACTION_STRING_COUNT; i++)
934 freez(src->string[i]);
937 for (i = 0; i < ACTION_MULTI_COUNT; i++)
939 destroy_list(src->multi[i]);
942 memset(src, '\0', sizeof(*src));
946 static struct file_list *current_actions_file[MAX_AF_FILES] = {
947 NULL, NULL, NULL, NULL, NULL,
948 NULL, NULL, NULL, NULL, NULL
952 #ifdef FEATURE_GRACEFUL_TERMINATION
953 /*********************************************************************
955 * Function : unload_current_actions_file
957 * Description : Unloads current actions file - reset to state at
958 * beginning of program.
964 *********************************************************************/
965 void unload_current_actions_file(void)
969 for (i = 0; i < MAX_AF_FILES; i++)
971 if (current_actions_file[i])
973 current_actions_file[i]->unloader = unload_actions_file;
974 current_actions_file[i] = NULL;
978 #endif /* FEATURE_GRACEFUL_TERMINATION */
981 /*********************************************************************
983 * Function : unload_actions_file
985 * Description : Unloads an actions module.
988 * 1 : file_data = the data structure associated with the
993 *********************************************************************/
994 void unload_actions_file(void *file_data)
996 struct url_actions * next;
997 struct url_actions * cur = (struct url_actions *)file_data;
1001 free_pattern_spec(cur->url);
1002 if ((next == NULL) || (next->action != cur->action))
1005 * As the action settings might be shared,
1006 * we can only free them if the current
1007 * url pattern is the last one, or if the
1008 * next one is using different settings.
1010 free_action_spec(cur->action);
1018 /*********************************************************************
1020 * Function : free_alias_list
1022 * Description : Free memory used by a list of aliases.
1025 * 1 : alias_list = Linked list to free.
1029 *********************************************************************/
1030 void free_alias_list(struct action_alias *alias_list)
1032 while (alias_list != NULL)
1034 struct action_alias * next = alias_list->next;
1035 alias_list->next = NULL;
1036 freez(alias_list->name);
1037 free_action(alias_list->action);
1044 /*********************************************************************
1046 * Function : load_action_files
1048 * Description : Read and parse all the action files and add to files
1052 * 1 : csp = Current client state (buffers, headers, etc...)
1054 * Returns : 0 => Ok, everything else is an error.
1056 *********************************************************************/
1057 int load_action_files(struct client_state *csp)
1062 for (i = 0; i < MAX_AF_FILES; i++)
1064 if (csp->config->actions_file[i])
1066 result = load_one_actions_file(csp, i);
1072 else if (current_actions_file[i])
1074 current_actions_file[i]->unloader = unload_actions_file;
1075 current_actions_file[i] = NULL;
1083 /*********************************************************************
1085 * Function : filter_type_to_string
1087 * Description : Converts a filter type enum into a string.
1090 * 1 : filter_type = filter_type as enum
1092 * Returns : Pointer to static string.
1094 *********************************************************************/
1095 static const char *filter_type_to_string(enum filter_type filter_type)
1097 switch (filter_type)
1099 case FT_CONTENT_FILTER:
1100 return "content filter";
1101 case FT_CLIENT_HEADER_FILTER:
1102 return "client-header filter";
1103 case FT_SERVER_HEADER_FILTER:
1104 return "server-header filter";
1105 case FT_CLIENT_HEADER_TAGGER:
1106 return "client-header tagger";
1107 case FT_SERVER_HEADER_TAGGER:
1108 return "server-header tagger";
1109 #ifdef FEATURE_EXTERNAL_FILTERS
1110 case FT_EXTERNAL_CONTENT_FILTER:
1111 return "external content filter";
1113 case FT_INVALID_FILTER:
1114 return "invalid filter type";
1117 return "unknown filter type";
1121 /*********************************************************************
1123 * Function : referenced_filters_are_missing
1125 * Description : Checks if any filters of a certain type referenced
1126 * in an action spec are missing.
1129 * 1 : csp = Current client state (buffers, headers, etc...)
1130 * 2 : cur_action = The action spec to check.
1131 * 3 : multi_index = The index where to look for the filter.
1132 * 4 : filter_type = The filter type the caller is interested in.
1134 * Returns : 0 => All referenced filters exist, everything else is an error.
1136 *********************************************************************/
1137 static int referenced_filters_are_missing(const struct client_state *csp,
1138 const struct action_spec *cur_action, int multi_index, enum filter_type filter_type)
1140 struct list_entry *filtername;
1142 for (filtername = cur_action->multi_add[multi_index]->first;
1143 filtername; filtername = filtername->next)
1145 if (NULL == get_filter(csp, filtername->str, filter_type))
1147 log_error(LOG_LEVEL_ERROR, "Missing %s '%s'",
1148 filter_type_to_string(filter_type), filtername->str);
1158 /*********************************************************************
1160 * Function : action_spec_is_valid
1162 * Description : Should eventually figure out if an action spec
1163 * is valid, but currently only checks that the
1164 * referenced filters are accounted for.
1167 * 1 : csp = Current client state (buffers, headers, etc...)
1168 * 2 : cur_action = The action spec to check.
1170 * Returns : 0 => No problems detected, everything else is an error.
1172 *********************************************************************/
1173 static int action_spec_is_valid(struct client_state *csp, const struct action_spec *cur_action)
1177 enum filter_type filter_type;
1179 {ACTION_MULTI_FILTER, FT_CONTENT_FILTER},
1180 {ACTION_MULTI_CLIENT_HEADER_FILTER, FT_CLIENT_HEADER_FILTER},
1181 {ACTION_MULTI_SERVER_HEADER_FILTER, FT_SERVER_HEADER_FILTER},
1182 {ACTION_MULTI_CLIENT_HEADER_TAGGER, FT_CLIENT_HEADER_TAGGER},
1183 {ACTION_MULTI_SERVER_HEADER_TAGGER, FT_SERVER_HEADER_TAGGER}
1188 for (i = 0; i < SZ(filter_map); i++)
1190 errors += referenced_filters_are_missing(csp, cur_action,
1191 filter_map[i].multi_index, filter_map[i].filter_type);
1199 /*********************************************************************
1201 * Function : load_one_actions_file
1203 * Description : Read and parse a action file and add to files
1207 * 1 : csp = Current client state (buffers, headers, etc...)
1208 * 2 : fileid = File index to load.
1210 * Returns : 0 => Ok, everything else is an error.
1212 *********************************************************************/
1213 static int load_one_actions_file(struct client_state *csp, int fileid)
1218 * Note: Keep these in the order they occur in the file, they are
1219 * sometimes tested with <=
1222 MODE_START_OF_FILE = 1,
1224 MODE_DESCRIPTION = 3,
1230 struct url_actions *last_perm;
1231 struct url_actions *perm;
1233 struct file_list *fs;
1234 struct action_spec * cur_action = NULL;
1235 int cur_action_used = 0;
1236 struct action_alias * alias_list = NULL;
1237 unsigned long linenum = 0;
1238 mode = MODE_START_OF_FILE;
1240 if (!check_file_changed(current_actions_file[fileid], csp->config->actions_file[fileid], &fs))
1242 /* No need to load */
1243 csp->actions_list[fileid] = current_actions_file[fileid];
1248 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': %E. "
1249 "Note that beginning with Privoxy 3.0.7, actions files have to be specified "
1250 "with their complete file names.", csp->config->actions_file[fileid]);
1251 return 1; /* never get here */
1254 fs->f = last_perm = zalloc_or_die(sizeof(*last_perm));
1256 if ((fp = fopen(csp->config->actions_file[fileid], "r")) == NULL)
1258 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': error opening file: %E",
1259 csp->config->actions_file[fileid]);
1260 return 1; /* never get here */
1263 log_error(LOG_LEVEL_INFO, "Loading actions file: %s", csp->config->actions_file[fileid]);
1265 while (read_config_line(fp, &linenum, &buf) != NULL)
1269 /* It's a header block */
1272 /* It's {{settings}} or {{alias}} */
1273 size_t len = strlen(buf);
1274 char * start = buf + 2;
1275 char * end = buf + len - 1;
1276 if ((len < (size_t)5) || (*end-- != '}') || (*end-- != '}'))
1280 log_error(LOG_LEVEL_FATAL,
1281 "can't load actions file '%s': invalid line (%lu): %s",
1282 csp->config->actions_file[fileid], linenum, buf);
1283 return 1; /* never get here */
1286 /* Trim leading and trailing whitespace. */
1294 log_error(LOG_LEVEL_FATAL,
1295 "can't load actions file '%s': invalid line (%lu): {{ }}",
1296 csp->config->actions_file[fileid], linenum);
1297 return 1; /* never get here */
1301 * An actionsfile can optionally contain the following blocks.
1302 * They *MUST* be in this order, to simplify processing:
1308 * ...free text, format TBD, but no line may start with a '{'...
1313 * The actual actions must be *after* these special blocks.
1314 * None of these special blocks may be repeated.
1317 if (0 == strcmpic(start, "settings"))
1319 /* it's a {{settings}} block */
1320 if (mode >= MODE_SETTINGS)
1322 /* {{settings}} must be first thing in file and must only
1326 log_error(LOG_LEVEL_FATAL,
1327 "can't load actions file '%s': line %lu: {{settings}} must only appear once, and it must be before anything else.",
1328 csp->config->actions_file[fileid], linenum);
1330 mode = MODE_SETTINGS;
1332 else if (0 == strcmpic(start, "description"))
1334 /* it's a {{description}} block */
1335 if (mode >= MODE_DESCRIPTION)
1337 /* {{description}} is a singleton and only {{settings}} may proceed it
1340 log_error(LOG_LEVEL_FATAL,
1341 "can't load actions file '%s': line %lu: {{description}} must only appear once, and only a {{settings}} block may be above it.",
1342 csp->config->actions_file[fileid], linenum);
1344 mode = MODE_DESCRIPTION;
1346 else if (0 == strcmpic(start, "alias"))
1348 /* it's an {{alias}} block */
1349 if (mode >= MODE_ALIAS)
1351 /* {{alias}} must be first thing in file, possibly after
1352 * {{settings}} and {{description}}
1354 * {{alias}} must only appear once.
1356 * Note that these are new restrictions introduced in
1357 * v2.9.10 in order to make actionsfile editing simpler.
1358 * (Otherwise, reordering actionsfile entries without
1359 * completely rewriting the file becomes non-trivial)
1362 log_error(LOG_LEVEL_FATAL,
1363 "can't load actions file '%s': line %lu: {{alias}} must only appear once, and it must be before all actions.",
1364 csp->config->actions_file[fileid], linenum);
1370 /* invalid {{something}} block */
1372 log_error(LOG_LEVEL_FATAL,
1373 "can't load actions file '%s': invalid line (%lu): {{%s}}",
1374 csp->config->actions_file[fileid], linenum, start);
1375 return 1; /* never get here */
1380 /* It's an actions block */
1386 mode = MODE_ACTIONS;
1388 /* free old action */
1391 if (!cur_action_used)
1393 free_action_spec(cur_action);
1397 cur_action_used = 0;
1398 cur_action = zalloc_or_die(sizeof(*cur_action));
1399 init_action(cur_action);
1402 * Copy the buffer before messing with it as we may need the
1403 * unmodified version in for the fatal error messages. Given
1404 * that this is not a common event, we could instead simply
1405 * read the line again.
1407 * buf + 1 to skip the leading '{'
1409 actions_buf = end = strdup_or_die(buf + 1);
1411 /* check we have a trailing } and then trim it */
1412 if (strlen(actions_buf))
1414 end += strlen(actions_buf) - 1;
1421 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': "
1422 "Missing trailing '}' in action section starting at line (%lu): %s",
1423 csp->config->actions_file[fileid], linenum, buf);
1424 return 1; /* never get here */
1428 /* trim any whitespace immediately inside {} */
1431 if (get_actions(actions_buf, alias_list, cur_action))
1436 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': "
1437 "can't completely parse the action section starting at line (%lu): %s",
1438 csp->config->actions_file[fileid], linenum, buf);
1439 return 1; /* never get here */
1442 if (action_spec_is_valid(csp, cur_action))
1444 log_error(LOG_LEVEL_ERROR, "Invalid action section in file '%s', "
1445 "starting at line %lu: %s",
1446 csp->config->actions_file[fileid], linenum, buf);
1452 else if (mode == MODE_SETTINGS)
1455 * Part of the {{settings}} block.
1456 * For now only serves to check if the file's minimum Privoxy
1457 * version requirement is met, but we may want to read & check
1458 * permissions when we go multi-user.
1460 if (!strncmp(buf, "for-privoxy-version=", 20))
1462 char *version_string, *fields[3];
1465 version_string = strdup_or_die(buf + 20);
1467 num_fields = ssplit(version_string, ".", fields, SZ(fields));
1469 if (num_fields < 1 || atoi(fields[0]) == 0)
1471 log_error(LOG_LEVEL_ERROR,
1472 "While loading actions file '%s': invalid line (%lu): %s",
1473 csp->config->actions_file[fileid], linenum, buf);
1475 else if ( (atoi(fields[0]) > VERSION_MAJOR)
1476 || ((num_fields > 1) && (atoi(fields[1]) > VERSION_MINOR))
1477 || ((num_fields > 2) && (atoi(fields[2]) > VERSION_POINT)))
1480 log_error(LOG_LEVEL_FATAL,
1481 "Actions file '%s', line %lu requires newer Privoxy version: %s",
1482 csp->config->actions_file[fileid], linenum, buf);
1483 return 1; /* never get here */
1485 free(version_string);
1488 else if (mode == MODE_DESCRIPTION)
1491 * Part of the {{description}} block.
1495 else if (mode == MODE_ALIAS)
1500 char actions_buf[BUFFER_SIZE];
1501 struct action_alias * new_alias;
1503 char * start = strchr(buf, '=');
1506 if ((start == NULL) || (start == buf))
1508 log_error(LOG_LEVEL_FATAL,
1509 "can't load actions file '%s': invalid alias line (%lu): %s",
1510 csp->config->actions_file[fileid], linenum, buf);
1511 return 1; /* never get here */
1514 new_alias = zalloc_or_die(sizeof(*new_alias));
1516 /* Eat any the whitespace before the '=' */
1518 while ((*end == ' ') || (*end == '\t'))
1521 * we already know we must have at least 1 non-ws char
1522 * at start of buf - no need to check
1528 /* Eat any the whitespace after the '=' */
1530 while ((*start == ' ') || (*start == '\t'))
1536 log_error(LOG_LEVEL_FATAL,
1537 "can't load actions file '%s': invalid alias line (%lu): %s",
1538 csp->config->actions_file[fileid], linenum, buf);
1539 return 1; /* never get here */
1542 new_alias->name = strdup_or_die(buf);
1544 strlcpy(actions_buf, start, sizeof(actions_buf));
1546 if (get_actions(actions_buf, alias_list, new_alias->action))
1550 log_error(LOG_LEVEL_FATAL,
1551 "can't load actions file '%s': invalid alias line (%lu): %s = %s",
1552 csp->config->actions_file[fileid], linenum, buf, start);
1553 return 1; /* never get here */
1557 new_alias->next = alias_list;
1558 alias_list = new_alias;
1560 else if (mode == MODE_ACTIONS)
1562 /* it's an URL pattern */
1564 /* allocate a new node */
1565 perm = zalloc_or_die(sizeof(*perm));
1567 perm->action = cur_action;
1568 cur_action_used = 1;
1570 /* Save the URL pattern */
1571 if (create_pattern_spec(perm->url, buf))
1574 log_error(LOG_LEVEL_FATAL,
1575 "can't load actions file '%s': line %lu: cannot create URL or TAG pattern from: %s",
1576 csp->config->actions_file[fileid], linenum, buf);
1577 return 1; /* never get here */
1580 /* add it to the list */
1581 last_perm->next = perm;
1584 else if (mode == MODE_START_OF_FILE)
1586 /* oops - please have a {} line as 1st line in file. */
1588 log_error(LOG_LEVEL_FATAL,
1589 "can't load actions file '%s': line %lu should begin with a '{': %s",
1590 csp->config->actions_file[fileid], linenum, buf);
1591 return 1; /* never get here */
1595 /* How did we get here? This is impossible! */
1597 log_error(LOG_LEVEL_FATAL,
1598 "can't load actions file '%s': INTERNAL ERROR - mode = %d",
1599 csp->config->actions_file[fileid], mode);
1600 return 1; /* never get here */
1607 if (!cur_action_used)
1609 free_action_spec(cur_action);
1611 free_alias_list(alias_list);
1613 /* the old one is now obsolete */
1614 if (current_actions_file[fileid])
1616 current_actions_file[fileid]->unloader = unload_actions_file;
1619 fs->next = files->next;
1621 current_actions_file[fileid] = fs;
1623 csp->actions_list[fileid] = fs;
1630 /*********************************************************************
1632 * Function : actions_to_text
1634 * Description : Converts a actionsfile entry from the internal
1635 * structure into a text line. The output is split
1636 * into one line for each action with line continuation.
1639 * 1 : action = The action to format.
1641 * Returns : A string. Caller must free it.
1642 * NULL on out-of-memory error.
1644 *********************************************************************/
1645 char * actions_to_text(const struct action_spec *action)
1647 unsigned long mask = action->mask;
1648 unsigned long add = action->add;
1649 char *result = strdup_or_die("");
1650 struct list_entry * lst;
1652 /* sanity - prevents "-feature +feature" */
1656 #define DEFINE_ACTION_BOOL(__name, __bit) \
1657 if (!(mask & __bit)) \
1659 string_append(&result, " -" __name " \\\n"); \
1661 else if (add & __bit) \
1663 string_append(&result, " +" __name " \\\n"); \
1666 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1667 if (!(mask & __bit)) \
1669 string_append(&result, " -" __name " \\\n"); \
1671 else if (add & __bit) \
1673 string_append(&result, " +" __name "{"); \
1674 string_append(&result, action->string[__index]); \
1675 string_append(&result, "} \\\n"); \
1678 #define DEFINE_ACTION_MULTI(__name, __index) \
1679 if (action->multi_remove_all[__index]) \
1681 string_append(&result, " -" __name " \\\n"); \
1685 lst = action->multi_remove[__index]->first; \
1688 string_append(&result, " -" __name "{"); \
1689 string_append(&result, lst->str); \
1690 string_append(&result, "} \\\n"); \
1694 lst = action->multi_add[__index]->first; \
1697 string_append(&result, " +" __name "{"); \
1698 string_append(&result, lst->str); \
1699 string_append(&result, "} \\\n"); \
1703 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1705 #include "actionlist.h"
1707 #undef DEFINE_ACTION_MULTI
1708 #undef DEFINE_ACTION_STRING
1709 #undef DEFINE_ACTION_BOOL
1710 #undef DEFINE_ACTION_ALIAS
1716 /*********************************************************************
1718 * Function : actions_to_html
1720 * Description : Converts a actionsfile entry from numeric form
1721 * ("mask" and "add") to a <br>-separated HTML string
1722 * in which each action is linked to its chapter in
1726 * 1 : csp = Client state (for config)
1727 * 2 : action = Action spec to be converted
1729 * Returns : A string. Caller must free it.
1730 * NULL on out-of-memory error.
1732 *********************************************************************/
1733 char * actions_to_html(const struct client_state *csp,
1734 const struct action_spec *action)
1736 unsigned long mask = action->mask;
1737 unsigned long add = action->add;
1738 char *result = strdup_or_die("");
1739 struct list_entry * lst;
1741 /* sanity - prevents "-feature +feature" */
1745 #define DEFINE_ACTION_BOOL(__name, __bit) \
1746 if (!(mask & __bit)) \
1748 string_append(&result, "\n<br>-"); \
1749 string_join(&result, add_help_link(__name, csp->config)); \
1751 else if (add & __bit) \
1753 string_append(&result, "\n<br>+"); \
1754 string_join(&result, add_help_link(__name, csp->config)); \
1757 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1758 if (!(mask & __bit)) \
1760 string_append(&result, "\n<br>-"); \
1761 string_join(&result, add_help_link(__name, csp->config)); \
1763 else if (add & __bit) \
1765 string_append(&result, "\n<br>+"); \
1766 string_join(&result, add_help_link(__name, csp->config)); \
1767 string_append(&result, "{"); \
1768 string_join(&result, html_encode(action->string[__index])); \
1769 string_append(&result, "}"); \
1772 #define DEFINE_ACTION_MULTI(__name, __index) \
1773 if (action->multi_remove_all[__index]) \
1775 string_append(&result, "\n<br>-"); \
1776 string_join(&result, add_help_link(__name, csp->config)); \
1780 lst = action->multi_remove[__index]->first; \
1783 string_append(&result, "\n<br>-"); \
1784 string_join(&result, add_help_link(__name, csp->config)); \
1785 string_append(&result, "{"); \
1786 string_join(&result, html_encode(lst->str)); \
1787 string_append(&result, "}"); \
1791 lst = action->multi_add[__index]->first; \
1794 string_append(&result, "\n<br>+"); \
1795 string_join(&result, add_help_link(__name, csp->config)); \
1796 string_append(&result, "{"); \
1797 string_join(&result, html_encode(lst->str)); \
1798 string_append(&result, "}"); \
1802 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1804 #include "actionlist.h"
1806 #undef DEFINE_ACTION_MULTI
1807 #undef DEFINE_ACTION_STRING
1808 #undef DEFINE_ACTION_BOOL
1809 #undef DEFINE_ACTION_ALIAS
1811 /* trim leading <br> */
1812 if (result && *result)
1815 result = strdup(result + 5);
1823 /*********************************************************************
1825 * Function : current_actions_to_html
1827 * Description : Converts a curren action spec to a <br> separated HTML
1828 * text in which each action is linked to its chapter in
1832 * 1 : csp = Client state (for config)
1833 * 2 : action = Current action spec to be converted
1835 * Returns : A string. Caller must free it.
1836 * NULL on out-of-memory error.
1838 *********************************************************************/
1839 char *current_action_to_html(const struct client_state *csp,
1840 const struct current_action_spec *action)
1842 unsigned long flags = action->flags;
1843 struct list_entry * lst;
1844 char *result = strdup_or_die("");
1845 char *active = strdup_or_die("");
1846 char *inactive = strdup_or_die("");
1848 #define DEFINE_ACTION_BOOL(__name, __bit) \
1849 if (flags & __bit) \
1851 string_append(&active, "\n<br>+"); \
1852 string_join(&active, add_help_link(__name, csp->config)); \
1856 string_append(&inactive, "\n<br>-"); \
1857 string_join(&inactive, add_help_link(__name, csp->config)); \
1860 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1861 if (flags & __bit) \
1863 string_append(&active, "\n<br>+"); \
1864 string_join(&active, add_help_link(__name, csp->config)); \
1865 string_append(&active, "{"); \
1866 string_join(&active, html_encode(action->string[__index])); \
1867 string_append(&active, "}"); \
1871 string_append(&inactive, "\n<br>-"); \
1872 string_join(&inactive, add_help_link(__name, csp->config)); \
1875 #define DEFINE_ACTION_MULTI(__name, __index) \
1876 lst = action->multi[__index]->first; \
1879 string_append(&inactive, "\n<br>-"); \
1880 string_join(&inactive, add_help_link(__name, csp->config)); \
1886 string_append(&active, "\n<br>+"); \
1887 string_join(&active, add_help_link(__name, csp->config)); \
1888 string_append(&active, "{"); \
1889 string_join(&active, html_encode(lst->str)); \
1890 string_append(&active, "}"); \
1895 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1897 #include "actionlist.h"
1899 #undef DEFINE_ACTION_MULTI
1900 #undef DEFINE_ACTION_STRING
1901 #undef DEFINE_ACTION_BOOL
1902 #undef DEFINE_ACTION_ALIAS
1906 string_append(&result, active);
1909 string_append(&result, "\n<br>");
1910 if (inactive != NULL)
1912 string_append(&result, inactive);
1919 /*********************************************************************
1921 * Function : action_to_line_of_text
1923 * Description : Converts a action spec to a single text line
1924 * listing the enabled actions.
1927 * 1 : action = Current action spec to be converted
1929 * Returns : A string. Caller must free it.
1930 * Out-of-memory errors are fatal.
1932 *********************************************************************/
1933 char *actions_to_line_of_text(const struct current_action_spec *action)
1936 struct list_entry *lst;
1938 const unsigned long flags = action->flags;
1940 active = strdup_or_die("");
1942 #define DEFINE_ACTION_BOOL(__name, __bit) \
1943 if (flags & __bit) \
1945 snprintf(buffer, sizeof(buffer), "+%s ", __name); \
1946 string_append(&active, buffer); \
1949 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1950 if (flags & __bit) \
1952 snprintf(buffer, sizeof(buffer), "+%s{%s} ", \
1953 __name, action->string[__index]); \
1954 string_append(&active, buffer); \
1957 #define DEFINE_ACTION_MULTI(__name, __index) \
1958 lst = action->multi[__index]->first; \
1959 while (lst != NULL) \
1961 snprintf(buffer, sizeof(buffer), "+%s{%s} ", \
1962 __name, lst->str); \
1963 string_append(&active, buffer); \
1967 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1969 #include "actionlist.h"
1971 #undef DEFINE_ACTION_MULTI
1972 #undef DEFINE_ACTION_STRING
1973 #undef DEFINE_ACTION_BOOL
1974 #undef DEFINE_ACTION_ALIAS
1978 log_error(LOG_LEVEL_FATAL, "Out of memory in action_to_line_of_text()");