/********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/loaders.c,v $ * * Purpose : Functions to load and unload the various * configuration files. Also contains code to manage * the list of active loaders, and to automatically * unload files that are no longer in use. * * Copyright : Written by and Copyright (C) 2001-2014 the * Privoxy team. https://www.privoxy.org/ * * Based on the Internet Junkbuster originally written * by and Copyright (C) 1997 Anonymous Coders and * Junkbusters Corporation. http://www.junkbusters.com * * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU General * Public License as published by the Free Software * Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will * be useful, but WITHOUT ANY WARRANTY; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A * PARTICULAR PURPOSE. See the GNU General Public * License for more details. * * The GNU General Public License should be included with * this file. If not, you can view it at * http://www.gnu.org/copyleft/gpl.html * or write to the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. * *********************************************************************/ #include "config.h" #include #include #include #include #include #include #include #include #if !defined(_WIN32) #include #endif #include "project.h" #include "list.h" #include "loaders.h" #include "filters.h" #include "parsers.h" #include "jcc.h" #include "miscutil.h" #include "errlog.h" #include "actions.h" #include "urlmatch.h" #include "encode.h" /* * Currently active files. * These are also entered in the main linked list of files. */ #ifdef FEATURE_TRUST static struct file_list *current_trustfile = NULL; #endif /* def FEATURE_TRUST */ #ifndef FUZZ static int load_one_re_filterfile(struct client_state *csp, int fileid); #endif static struct file_list *current_re_filterfile[MAX_AF_FILES] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; /********************************************************************* * * Function : free_csp_resources * * Description : Frees memory referenced by the csp that isn't * shared with other csps. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * * Returns : N/A * *********************************************************************/ void free_csp_resources(struct client_state *csp) { freez(csp->ip_addr_str); #ifdef FEATURE_CLIENT_TAGS freez(csp->client_address); #endif freez(csp->listen_addr_str); freez(csp->client_iob->buf); freez(csp->iob->buf); freez(csp->error_message); if (csp->action->flags & ACTION_FORWARD_OVERRIDE && NULL != csp->fwd) { unload_forward_spec(csp->fwd); } free_http_request(csp->http); destroy_list(csp->headers); #ifdef FEATURE_HTTPS_INSPECTION destroy_list(csp->https_headers); #endif destroy_list(csp->tags); #ifdef FEATURE_CLIENT_TAGS destroy_list(csp->client_tags); #endif free_current_action(csp->action); } /********************************************************************* * * Function : sweep * * Description : Basically a mark and sweep garbage collector, it is run * (by the parent thread) every once in a while to reclaim memory. * * It uses a mark and sweep strategy: * 1) mark all files as inactive * * 2) check with each client: * if it is active, mark its files as active * if it is inactive, free its resources * * 3) free the resources of all of the files that * are still marked as inactive (and are obsolete). * * N.B. files that are not obsolete don't have an unloader defined. * * Parameters : None * * Returns : The number of threads that are still active. * *********************************************************************/ unsigned int sweep(void) { struct file_list *fl, *nfl; struct client_state *csp; struct client_states *last_active, *client_list; int i; unsigned int active_threads = 0; /* clear all of the file's active flags */ for (fl = files->next; NULL != fl; fl = fl->next) { fl->active = 0; } last_active = clients; client_list = clients->next; while (NULL != client_list) { csp = &client_list->csp; if (csp->flags & CSP_FLAG_ACTIVE) { /* Mark this client's files as active */ /* * Always have a configuration file. * (Also note the slightly non-standard extra * indirection here.) */ csp->config->config_file_list->active = 1; /* * Actions files */ for (i = 0; i < MAX_AF_FILES; i++) { if (csp->actions_list[i]) { csp->actions_list[i]->active = 1; } } /* * Filter files */ for (i = 0; i < MAX_AF_FILES; i++) { if (csp->rlist[i]) { csp->rlist[i]->active = 1; } } /* * Trust file */ #ifdef FEATURE_TRUST if (csp->tlist) { csp->tlist->active = 1; } #endif /* def FEATURE_TRUST */ active_threads++; last_active = client_list; client_list = client_list->next; } else /* * This client is not active. Free its resources. */ { last_active->next = client_list->next; #ifdef FEATURE_STATISTICS urls_read++; if (csp->flags & CSP_FLAG_REJECTED) { urls_rejected++; } #endif /* def FEATURE_STATISTICS */ freez(client_list); client_list = last_active->next; } } nfl = files; fl = files->next; while (fl != NULL) { if ((0 == fl->active) && (NULL != fl->unloader)) { nfl->next = fl->next; (fl->unloader)(fl->f); freez(fl->filename); freez(fl); fl = nfl->next; } else { nfl = fl; fl = fl->next; } } return active_threads; } /********************************************************************* * * Function : check_file_changed * * Description : Helper function to check if a file needs reloading. * If "current" is still current, return it. Otherwise * allocates a new (zeroed) "struct file_list", fills * in the disk file name and timestamp, and returns it. * * Parameters : * 1 : current = The file_list currently being used - will * be checked to see if it is out of date. * May be NULL (which is treated as out of * date). * 2 : filename = Name of file to check. * 3 : newfl = New file list. [Output only] * This will be set to NULL, OR a struct * file_list newly allocated on the * heap, with the filename and lastmodified * fields filled, and all others zeroed. * * Returns : If file unchanged: 0 (and sets newfl == NULL) * If file changed: 1 and sets newfl != NULL * On error: 1 and sets newfl == NULL * *********************************************************************/ int check_file_changed(const struct file_list * current, const char * filename, struct file_list ** newfl) { struct file_list *fs; struct stat statbuf[1]; *newfl = NULL; if (stat(filename, statbuf) < 0) { /* Error, probably file not found. */ return 1; } if (current && (current->lastmodified == statbuf->st_mtime) && (0 == strcmp(current->filename, filename))) { return 0; } fs = zalloc_or_die(sizeof(struct file_list)); fs->filename = strdup_or_die(filename); fs->lastmodified = statbuf->st_mtime; *newfl = fs; return 1; } /********************************************************************* * * Function : simple_read_line * * Description : Read a single line from a file and return it. * This is basically a version of fgets() that malloc()s * it's own line buffer. Note that the buffer will * always be a multiple of BUFFER_SIZE bytes long. * Therefore if you are going to keep the string for * an extended period of time, you should probably * strdup() it and free() the original, to save memory. * * * Parameters : * 1 : dest = destination for newly malloc'd pointer to * line data. Will be set to NULL on error. * 2 : fp = File to read from * 3 : newline = Standard for newlines in the file. * Will be unchanged if it's value on input is not * NEWLINE_UNKNOWN. * On output, may be changed from NEWLINE_UNKNOWN to * actual convention in file. * * Returns : JB_ERR_OK on success * JB_ERR_MEMORY on out-of-memory * JB_ERR_FILE on EOF. * *********************************************************************/ jb_err simple_read_line(FILE *fp, char **dest, int *newline) { size_t len = 0; size_t buflen = BUFFER_SIZE; char * buf; char * p; int ch; int realnewline = NEWLINE_UNKNOWN; if (NULL == (buf = malloc(buflen))) { return JB_ERR_MEMORY; } p = buf; /* * Character codes. If you have a weird compiler and the following are * incorrect, you also need to fix NEWLINE() in loaders.h */ #define CHAR_CR '\r' /* ASCII 13 */ #define CHAR_LF '\n' /* ASCII 10 */ for (;;) { ch = getc(fp); if (ch == EOF) { if (len > 0) { *p = '\0'; *dest = buf; return JB_ERR_OK; } else { free(buf); *dest = NULL; return JB_ERR_FILE; } } else if (ch == CHAR_CR) { ch = getc(fp); if (ch == CHAR_LF) { if (*newline == NEWLINE_UNKNOWN) { *newline = NEWLINE_DOS; } } else { if (ch != EOF) { ungetc(ch, fp); } if (*newline == NEWLINE_UNKNOWN) { *newline = NEWLINE_MAC; } } *p = '\0'; *dest = buf; if (*newline == NEWLINE_UNKNOWN) { *newline = realnewline; } return JB_ERR_OK; } else if (ch == CHAR_LF) { *p = '\0'; *dest = buf; if (*newline == NEWLINE_UNKNOWN) { *newline = NEWLINE_UNIX; } return JB_ERR_OK; } else if (ch == 0) { /* XXX: Why do we allow this anyway? */ *p = '\0'; *dest = buf; return JB_ERR_OK; } *p++ = (char)ch; if (++len >= buflen) { buflen += BUFFER_SIZE; if (NULL == (p = realloc(buf, buflen))) { free(buf); return JB_ERR_MEMORY; } buf = p; p = buf + len; } } } /********************************************************************* * * Function : edit_read_line * * Description : Read a single non-empty line from a file and return * it. Trims comments, leading and trailing whitespace * and respects escaping of newline and comment char. * Provides the line in 2 alternative forms: raw and * preprocessed. * - raw is the raw data read from the file. If the * line is not modified, then this should be written * to the new file. * - prefix is any comments and blank lines that were * read from the file. If the line is modified, then * this should be written out to the file followed * by the modified data. (If this string is non-empty * then it will have a newline at the end). * - data is the actual data that will be parsed * further by appropriate routines. * On EOF, the 3 strings will all be set to NULL and * 0 will be returned. * * Parameters : * 1 : fp = File to read from * 2 : raw_out = destination for newly malloc'd pointer to * raw line data. May be NULL if you don't want it. * 3 : prefix_out = destination for newly malloc'd pointer to * comments. May be NULL if you don't want it. * 4 : data_out = destination for newly malloc'd pointer to * line data with comments and leading/trailing spaces * removed, and line continuation performed. May be * NULL if you don't want it. * 5 : newline = Standard for newlines in the file. * On input, set to value to use or NEWLINE_UNKNOWN. * On output, may be changed from NEWLINE_UNKNOWN to * actual convention in file. May be NULL if you * don't want it. * 6 : line_number = Line number in file. In "lines" as * reported by a text editor, not lines containing data. * * Returns : JB_ERR_OK on success * JB_ERR_MEMORY on out-of-memory * JB_ERR_FILE on EOF. * *********************************************************************/ jb_err edit_read_line(FILE *fp, char **raw_out, char **prefix_out, char **data_out, int *newline, unsigned long *line_number) { char *p; /* Temporary pointer */ char *linebuf; /* Line read from file */ char *linestart; /* Start of linebuf, usually first non-whitespace char */ int contflag = 0; /* Nonzero for line continuation - i.e. line ends '\' */ int is_empty = 1; /* Flag if not got any data yet */ char *raw = NULL; /* String to be stored in raw_out */ char *prefix = NULL; /* String to be stored in prefix_out */ char *data = NULL; /* String to be stored in data_out */ int scrapnewline; /* Used for (*newline) if newline==NULL */ jb_err rval = JB_ERR_OK; assert(fp); assert(raw_out || data_out); assert(newline == NULL || *newline == NEWLINE_UNKNOWN || *newline == NEWLINE_UNIX || *newline == NEWLINE_DOS || *newline == NEWLINE_MAC); if (newline == NULL) { scrapnewline = NEWLINE_UNKNOWN; newline = &scrapnewline; } /* Set output parameters to NULL */ if (raw_out) { *raw_out = NULL; } if (prefix_out) { *prefix_out = NULL; } if (data_out) { *data_out = NULL; } /* Set string variables to new, empty strings. */ if (raw_out) { raw = strdup_or_die(""); } if (prefix_out) { prefix = strdup_or_die(""); } if (data_out) { data = strdup_or_die(""); } /* Main loop. Loop while we need more data & it's not EOF. */ while ((contflag || is_empty) && (JB_ERR_OK == (rval = simple_read_line(fp, &linebuf, newline)))) { if (line_number) { (*line_number)++; } if (raw) { string_append(&raw,linebuf); if (string_append(&raw,NEWLINE(*newline))) { freez(prefix); freez(data); free(linebuf); return JB_ERR_MEMORY; } } /* Line continuation? Trim escape and set flag. */ p = linebuf + strlen(linebuf) - 1; contflag = ((*linebuf != '\0') && (*p == '\\')); if (contflag) { *p = '\0'; } /* Trim leading spaces if we're at the start of the line */ linestart = linebuf; assert(NULL != data); if (*data == '\0') { /* Trim leading spaces */ while (*linestart && isspace((int)(unsigned char)*linestart)) { linestart++; } } /* Handle comment characters. */ p = linestart; while ((p = strchr(p, '#')) != NULL) { /* Found a comment char.. */ if ((p != linebuf) && (*(p-1) == '\\')) { /* ..and it's escaped, left-shift the line over the escape. */ char *q = p - 1; while ((*q = *(q + 1)) != '\0') { q++; } /* Now scan from just after the "#". */ } else { /* Real comment. Save it... */ if (p == linestart) { /* Special case: Line only contains a comment, so all the * previous whitespace is considered part of the comment. * Undo the whitespace skipping, if any. */ linestart = linebuf; p = linestart; } if (prefix) { string_append(&prefix,p); if (string_append(&prefix, NEWLINE(*newline))) { freez(raw); freez(data); free(linebuf); return JB_ERR_MEMORY; } } /* ... and chop off the rest of the line */ *p = '\0'; } } /* END while (there's a # character) */ /* Write to the buffer */ if (*linestart) { is_empty = 0; if (string_append(&data, linestart)) { freez(raw); freez(prefix); free(linebuf); return JB_ERR_MEMORY; } } free(linebuf); } /* END while(we need more data) */ /* Handle simple_read_line() errors - ignore EOF */ if ((rval != JB_ERR_OK) && (rval != JB_ERR_FILE)) { freez(raw); freez(prefix); freez(data); return rval; } if (raw ? (*raw == '\0') : is_empty) { /* EOF and no data there. (Definition of "data" depends on whether * the caller cares about "raw" or just "data"). */ freez(raw); freez(prefix); freez(data); return JB_ERR_FILE; } else { /* Got at least some data */ /* Remove trailing whitespace */ chomp(data); if (raw_out) { *raw_out = raw; } else { freez(raw); } if (prefix_out) { *prefix_out = prefix; } else { freez(prefix); } if (data_out) { *data_out = data; } else { freez(data); } return JB_ERR_OK; } } /********************************************************************* * * Function : read_config_line * * Description : Read a single non-empty line from a file and return * it. Trims comments, leading and trailing whitespace * and respects escaping of newline and comment char. * * Parameters : * 1 : fp = File to read from * 2 : linenum = linenumber in file * 3 : buf = Pointer to a pointer to set to the data buffer. * * Returns : NULL on EOF or error * Otherwise, returns buf. * *********************************************************************/ char *read_config_line(FILE *fp, unsigned long *linenum, char **buf) { jb_err err; err = edit_read_line(fp, NULL, NULL, buf, NULL, linenum); if (err) { if (err == JB_ERR_MEMORY) { log_error(LOG_LEVEL_FATAL, "Out of memory loading a config file"); } *buf = NULL; } return *buf; } #ifdef FEATURE_TRUST /********************************************************************* * * Function : unload_trustfile * * Description : Unloads a trustfile. * * Parameters : * 1 : f = the data structure associated with the trustfile. * * Returns : N/A * *********************************************************************/ static void unload_trustfile(void *f) { struct block_spec *cur = (struct block_spec *)f; struct block_spec *next; while (cur != NULL) { next = cur->next; free_pattern_spec(cur->url); free(cur); cur = next; } } #ifdef FEATURE_GRACEFUL_TERMINATION /********************************************************************* * * Function : unload_current_trust_file * * Description : Unloads current trust file - reset to state at * beginning of program. * * Parameters : None * * Returns : N/A * *********************************************************************/ void unload_current_trust_file(void) { if (current_trustfile) { current_trustfile->unloader = unload_trustfile; current_trustfile = NULL; } } #endif /* FEATURE_GRACEFUL_TERMINATION */ /********************************************************************* * * Function : load_trustfile * * Description : Read and parse a trustfile and add to files list. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * * Returns : 0 => Ok, everything else is an error. * *********************************************************************/ int load_trustfile(struct client_state *csp) { FILE *fp; struct block_spec *b, *bl; struct pattern_spec **tl; char *buf = NULL; int reject, trusted; struct file_list *fs; unsigned long linenum = 0; int trusted_referrers = 0; if (!check_file_changed(current_trustfile, csp->config->trustfile, &fs)) { /* No need to load */ csp->tlist = current_trustfile; return(0); } if (!fs) { goto load_trustfile_error; } fs->f = bl = zalloc_or_die(sizeof(*bl)); if ((fp = fopen(csp->config->trustfile, "r")) == NULL) { goto load_trustfile_error; } log_error(LOG_LEVEL_INFO, "Loading trust file: %s", csp->config->trustfile); tl = csp->config->trust_list; while (read_config_line(fp, &linenum, &buf) != NULL) { trusted = 0; reject = 1; if (*buf == '+') { trusted = 1; *buf = '~'; } if (*buf == '~') { char *p; char *q; reject = 0; p = buf; q = p+1; while ((*p++ = *q++) != '\0') { /* nop */ } } /* skip blank lines */ if (*buf == '\0') { freez(buf); continue; } /* allocate a new node */ b = zalloc_or_die(sizeof(*b)); /* add it to the list */ b->next = bl->next; bl->next = b; b->reject = reject; /* Save the URL pattern */ if (create_pattern_spec(b->url, buf)) { fclose(fp); goto load_trustfile_error; } /* * save a pointer to URL's spec in the list of trusted URL's, too */ if (trusted) { if (++trusted_referrers < MAX_TRUSTED_REFERRERS) { *tl++ = b->url; } } freez(buf); } if (trusted_referrers >= MAX_TRUSTED_REFERRERS) { /* * FIXME: ... after Privoxy 3.0.4 is out. */ log_error(LOG_LEVEL_ERROR, "Too many trusted referrers. Current limit is %d, you are using %d.\n" " Additional trusted referrers are treated like ordinary trusted URLs.\n" " (You can increase this limit by changing MAX_TRUSTED_REFERRERS in project.h and recompiling).", MAX_TRUSTED_REFERRERS, trusted_referrers); } *tl = NULL; fclose(fp); /* the old one is now obsolete */ if (current_trustfile) { current_trustfile->unloader = unload_trustfile; } fs->next = files->next; files->next = fs; current_trustfile = fs; csp->tlist = fs; return(0); load_trustfile_error: log_error(LOG_LEVEL_FATAL, "can't load trustfile '%s': %E", csp->config->trustfile); freez(buf); return(-1); } #endif /* def FEATURE_TRUST */ /********************************************************************* * * Function : unload_re_filterfile * * Description : Unload the re_filter list by freeing all chained * re_filterfile specs and their data. * * Parameters : * 1 : f = the data structure associated with the filterfile. * * Returns : N/A * *********************************************************************/ static void unload_re_filterfile(void *f) { struct re_filterfile_spec *a, *b = (struct re_filterfile_spec *)f; while (b != NULL) { a = b->next; destroy_list(b->patterns); pcrs_free_joblist(b->joblist); freez(b->name); freez(b->description); freez(b); b = a; } return; } /********************************************************************* * * Function : unload_forward_spec * * Description : Unload the forward spec settings by freeing all * memory referenced by members and the memory for * the spec itself. * * Parameters : * 1 : fwd = the forward spec. * * Returns : N/A * *********************************************************************/ void unload_forward_spec(struct forward_spec *fwd) { free_pattern_spec(fwd->url); freez(fwd->gateway_host); freez(fwd->forward_host); freez(fwd->auth_username); freez(fwd->auth_password); free(fwd); return; } #ifdef FEATURE_GRACEFUL_TERMINATION /********************************************************************* * * Function : unload_current_re_filterfile * * Description : Unloads current re_filter file - reset to state at * beginning of program. * * Parameters : None * * Returns : N/A * *********************************************************************/ void unload_current_re_filterfile(void) { int i; for (i = 0; i < MAX_AF_FILES; i++) { if (current_re_filterfile[i]) { current_re_filterfile[i]->unloader = unload_re_filterfile; current_re_filterfile[i] = NULL; } } } #endif /********************************************************************* * * Function : load_re_filterfiles * * Description : Loads all the filterfiles. * Generate a chained list of re_filterfile_spec's from * the "FILTER: " blocks, compiling all their substitutions * into chained lists of pcrs_job structs. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * * Returns : 0 => Ok, everything else is an error. * *********************************************************************/ int load_re_filterfiles(struct client_state *csp) { int i; int result; for (i = 0; i < MAX_AF_FILES; i++) { if (csp->config->re_filterfile[i]) { result = load_one_re_filterfile(csp, i); if (result) { return result; } } else if (current_re_filterfile[i]) { current_re_filterfile[i]->unloader = unload_re_filterfile; current_re_filterfile[i] = NULL; } } return 0; } /********************************************************************* * * Function : load_one_re_filterfile * * Description : Load a re_filterfile. * Generate a chained list of re_filterfile_spec's from * the "FILTER: " blocks, compiling all their substitutions * into chained lists of pcrs_job structs. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * * Returns : 0 => Ok, everything else is an error. * *********************************************************************/ int load_one_re_filterfile(struct client_state *csp, int fileid) { FILE *fp; struct re_filterfile_spec *new_bl, *bl = NULL; struct file_list *fs; char *buf = NULL; unsigned long linenum = 0; pcrs_job *dummy, *lastjob = NULL; /* * No need to reload if unchanged */ if (!check_file_changed(current_re_filterfile[fileid], csp->config->re_filterfile[fileid], &fs)) { csp->rlist[fileid] = current_re_filterfile[fileid]; return(0); } if (!fs) { goto load_re_filterfile_error; } /* * Open the file or fail */ if ((fp = fopen(csp->config->re_filterfile[fileid], "r")) == NULL) { goto load_re_filterfile_error; } log_error(LOG_LEVEL_INFO, "Loading filter file: %s", csp->config->re_filterfile[fileid]); /* * Read line by line */ while (read_config_line(fp, &linenum, &buf) != NULL) { enum filter_type new_filter = FT_INVALID_FILTER; if (strncmp(buf, "FILTER:", 7) == 0) { new_filter = FT_CONTENT_FILTER; } else if (strncmp(buf, "SERVER-HEADER-FILTER:", 21) == 0) { new_filter = FT_SERVER_HEADER_FILTER; } else if (strncmp(buf, "CLIENT-HEADER-FILTER:", 21) == 0) { new_filter = FT_CLIENT_HEADER_FILTER; } else if (strncmp(buf, "CLIENT-HEADER-TAGGER:", 21) == 0) { new_filter = FT_CLIENT_HEADER_TAGGER; } else if (strncmp(buf, "SERVER-HEADER-TAGGER:", 21) == 0) { new_filter = FT_SERVER_HEADER_TAGGER; } #ifdef FEATURE_EXTERNAL_FILTERS else if (strncmp(buf, "EXTERNAL-FILTER:", 16) == 0) { new_filter = FT_EXTERNAL_CONTENT_FILTER; } #endif else if (strncmp(buf, "CLIENT-BODY-FILTER:", 19) == 0) { new_filter = FT_CLIENT_BODY_FILTER; } /* * If this is the head of a new filter block, make it a * re_filterfile spec of its own and chain it to the list: */ if (new_filter != FT_INVALID_FILTER) { new_bl = zalloc_or_die(sizeof(*bl)); if (new_filter == FT_CONTENT_FILTER) { new_bl->name = chomp(buf + 7); } #ifdef FEATURE_EXTERNAL_FILTERS else if (new_filter == FT_EXTERNAL_CONTENT_FILTER) { new_bl->name = chomp(buf + 16); } #endif else if (new_filter == FT_CLIENT_BODY_FILTER) { new_bl->name = chomp(buf + 19); } else { new_bl->name = chomp(buf + 21); } new_bl->type = new_filter; /* * If a filter description is available, * encode it to HTML and save it. */ if (NULL != (new_bl->description = strpbrk(new_bl->name, " \t"))) { *new_bl->description++ = '\0'; new_bl->description = html_encode(chomp(new_bl->description)); if (NULL == new_bl->description) { new_bl->description = strdup_or_die("Out of memory while " "encoding filter description to HTML"); } } else { new_bl->description = strdup_or_die("No description available"); } new_bl->name = strdup_or_die(chomp(new_bl->name)); /* * If this is the first filter block, chain it * to the file_list rather than its (nonexistent) * predecessor */ if (fs->f == NULL) { fs->f = new_bl; } else { assert(NULL != bl); bl->next = new_bl; } bl = new_bl; log_error(LOG_LEVEL_RE_FILTER, "Reading in filter \"%s\" (\"%s\")", bl->name, bl->description); #ifdef FEATURE_EXTENDED_STATISTICS register_filter_for_statistics(bl->name); #endif freez(buf); continue; } #ifdef FEATURE_EXTERNAL_FILTERS if ((bl != NULL) && (bl->type == FT_EXTERNAL_CONTENT_FILTER)) { jb_err jb_error; /* Save the code as "pattern", but do not compile anything. */ if (bl->patterns->first != NULL) { log_error(LOG_LEVEL_FATAL, "External filter '%s' contains several jobs. " "Did you forget to escape a line break?", bl->name); } jb_error = enlist(bl->patterns, buf); if (JB_ERR_MEMORY == jb_error) { log_error(LOG_LEVEL_FATAL, "Out of memory while enlisting external filter code \'%s\' for filter %s.", buf, bl->name); } freez(buf); continue; } #endif if (bl != NULL) { int pcrs_error; jb_err jb_error; /* * Save the expression, make it a pcrs_job * and chain it into the current filter's joblist */ jb_error = enlist(bl->patterns, buf); if (JB_ERR_MEMORY == jb_error) { log_error(LOG_LEVEL_FATAL, "Out of memory while enlisting re_filter job \'%s\' for filter %s.", buf, bl->name); } assert(JB_ERR_OK == jb_error); if (pcrs_job_is_dynamic(buf)) { /* * Dynamic pattern that might contain variables * and has to be recompiled for every request */ if (bl->joblist != NULL) { pcrs_free_joblist(bl->joblist); bl->joblist = NULL; } bl->dynamic = 1; log_error(LOG_LEVEL_RE_FILTER, "Adding dynamic re_filter job \'%s\' to filter %s succeeded.", buf, bl->name); freez(buf); continue; } else if (bl->dynamic) { /* * A previous job was dynamic and as we * recompile the whole filter anyway, it * makes no sense to compile this job now. */ log_error(LOG_LEVEL_RE_FILTER, "Adding static re_filter job \'%s\' to dynamic filter %s succeeded.", buf, bl->name); freez(buf); continue; } if ((dummy = pcrs_compile_command(buf, &pcrs_error)) == NULL) { log_error(LOG_LEVEL_ERROR, "Adding re_filter job \'%s\' to filter %s failed: %s", buf, bl->name, pcrs_strerror(pcrs_error)); freez(buf); continue; } else { if (bl->joblist == NULL) { bl->joblist = dummy; } else if (NULL != lastjob) { lastjob->next = dummy; } lastjob = dummy; log_error(LOG_LEVEL_RE_FILTER, "Adding re_filter job \'%s\' to filter %s succeeded.", buf, bl->name); } } else { log_error(LOG_LEVEL_ERROR, "Ignoring job %s outside filter block in %s, line %lu", buf, csp->config->re_filterfile[fileid], linenum); } freez(buf); } fclose(fp); /* * Schedule the now-obsolete old data for unloading */ if (NULL != current_re_filterfile[fileid]) { current_re_filterfile[fileid]->unloader = unload_re_filterfile; } /* * Chain this file into the global list of loaded files */ fs->next = files->next; files->next = fs; current_re_filterfile[fileid] = fs; csp->rlist[fileid] = fs; return(0); load_re_filterfile_error: log_error(LOG_LEVEL_FATAL, "can't load re_filterfile '%s': %E", csp->config->re_filterfile[fileid]); return(-1); } /********************************************************************* * * Function : add_loader * * Description : Called from `load_config'. Called once for each input * file found in config. * * Parameters : * 1 : loader = pointer to a function that can parse and load * the appropriate config file. * 2 : config = The configuration_spec to add the loader to. * * Returns : N/A * *********************************************************************/ void add_loader(int (*loader)(struct client_state *), struct configuration_spec * config) { int i; for (i = 0; i < NLOADERS; i++) { if (config->loaders[i] == NULL) { config->loaders[i] = loader; break; } } } /********************************************************************* * * Function : run_loader * * Description : Called from `load_config' and `listen_loop'. This * function keeps the "csp" current with any file mods * since the last loop. If a file is unchanged, the * loader functions do NOT reload the file. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * Must be non-null. Reads: "csp->config" * Writes: various data members. * * Returns : 0 => Ok, everything else is an error. * *********************************************************************/ int run_loader(struct client_state *csp) { int ret = 0; int i; for (i = 0; i < NLOADERS; i++) { if (csp->config->loaders[i] == NULL) { break; } ret |= (csp->config->loaders[i])(csp); } return(ret); } /********************************************************************* * * Function : file_has_been_modified * * Description : Helper function to check if a file has been changed * * Parameters : * 1 : filename = The name of the file to check * 2 : last_known_modification = The time of the last known * modification * * Returns : TRUE if the file has been changed, * FALSE otherwise. * *********************************************************************/ static int file_has_been_modified(const char *filename, time_t last_know_modification) { struct stat statbuf[1]; if (stat(filename, statbuf) < 0) { /* Error, probably file not found which counts as change. */ return 1; } return (last_know_modification != statbuf->st_mtime); } /********************************************************************* * * Function : any_loaded_file_changed * * Description : Helper function to check if any loaded file has been * changed since the time it has been loaded. * * XXX: Should we cache the return value for x seconds? * * Parameters : * 1 : files_to_check = List of files to check * * Returns : TRUE if any file has been changed, * FALSE otherwise. * *********************************************************************/ int any_loaded_file_changed(const struct client_state *csp) { const struct file_list *file_to_check = csp->config->config_file_list; int i; if (file_has_been_modified(file_to_check->filename, file_to_check->lastmodified)) { return TRUE; } for (i = 0; i < MAX_AF_FILES; i++) { if (csp->actions_list[i]) { file_to_check = csp->actions_list[i]; if (file_has_been_modified(file_to_check->filename, file_to_check->lastmodified)) { return TRUE; } } } for (i = 0; i < MAX_AF_FILES; i++) { if (csp->rlist[i]) { file_to_check = csp->rlist[i]; if (file_has_been_modified(file_to_check->filename, file_to_check->lastmodified)) { return TRUE; } } } #ifdef FEATURE_TRUST if (csp->tlist) { if (file_has_been_modified(csp->tlist->filename, csp->tlist->lastmodified)) { return TRUE; } } #endif /* def FEATURE_TRUST */ return FALSE; } /* Local Variables: tab-width: 3 end: */