1 const char urlmatch_rcs[] = "$Id: urlmatch.c,v 1.81 2014/05/26 10:48:07 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/urlmatch.c,v $
6 * Purpose : Declares functions to match URLs against URL
9 * Copyright : Written by and Copyright (C) 2001-2011
10 * the Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
34 *********************************************************************/
41 #include <sys/types.h>
49 #if !defined(_WIN32) && !defined(__OS2__)
59 const char urlmatch_h_rcs[] = URLMATCH_H_VERSION;
68 static jb_err compile_host_pattern(struct pattern_spec *url, const char *host_pattern);
70 /*********************************************************************
72 * Function : free_http_request
74 * Description : Freez a http_request structure
77 * 1 : http = points to a http_request structure to free
81 *********************************************************************/
82 void free_http_request(struct http_request *http)
91 freez(http->hostport);
94 freez(http->host_ip_addr_str);
95 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
103 #ifndef FEATURE_EXTENDED_HOST_PATTERNS
104 /*********************************************************************
106 * Function : init_domain_components
108 * Description : Splits the domain name so we can compare it
109 * against wildcards. It used to be part of
110 * parse_http_url, but was separated because the
111 * same code is required in chat in case of
112 * intercepted requests.
115 * 1 : http = pointer to the http structure to hold elements.
117 * Returns : JB_ERR_OK on success
118 * JB_ERR_PARSE on malformed command/URL
119 * or >100 domains deep.
121 *********************************************************************/
122 jb_err init_domain_components(struct http_request *http)
124 char *vec[BUFFER_SIZE];
128 http->dbuffer = strdup_or_die(http->host);
130 /* map to lower case */
131 for (p = http->dbuffer; *p ; p++)
133 *p = (char)privoxy_tolower(*p);
136 /* split the domain name into components */
137 http->dcount = ssplit(http->dbuffer, ".", vec, SZ(vec));
139 if (http->dcount <= 0)
142 * Error: More than SZ(vec) components in domain
143 * or: no components in domain
145 log_error(LOG_LEVEL_ERROR, "More than SZ(vec) components in domain or none at all.");
149 /* save a copy of the pointers in dvec */
150 size = (size_t)http->dcount * sizeof(*http->dvec);
152 http->dvec = malloc_or_die(size);
154 memcpy(http->dvec, vec, size);
158 #endif /* ndef FEATURE_EXTENDED_HOST_PATTERNS */
161 /*********************************************************************
163 * Function : url_requires_percent_encoding
165 * Description : Checks if an URL contains invalid characters
166 * according to RFC 3986 that should be percent-encoded.
167 * Does not verify whether or not the passed string
168 * actually is a valid URL.
171 * 1 : url = URL to check
173 * Returns : True in case of valid URLs, false otherwise
175 *********************************************************************/
176 int url_requires_percent_encoding(const char *url)
178 static const char allowed_characters[128] = {
179 '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
180 '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
181 '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
182 '\0', '\0', '\0', '!', '\0', '#', '$', '%', '&', '\'',
183 '(', ')', '*', '+', ',', '-', '.', '/', '0', '1',
184 '2', '3', '4', '5', '6', '7', '8', '9', ':', ';',
185 '\0', '=', '\0', '?', '@', 'A', 'B', 'C', 'D', 'E',
186 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
187 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',
188 'Z', '[', '\0', ']', '\0', '_', '\0', 'a', 'b', 'c',
189 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
190 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
191 'x', 'y', 'z', '\0', '\0', '\0', '~', '\0'
196 const unsigned int i = (unsigned char)*url++;
197 if (i >= sizeof(allowed_characters) || '\0' == allowed_characters[i])
208 /*********************************************************************
210 * Function : parse_http_url
212 * Description : Parse out the host and port from the URL. Find the
213 * hostname & path, port (if ':'), and/or password (if '@')
216 * 1 : url = URL (or is it URI?) to break down
217 * 2 : http = pointer to the http structure to hold elements.
218 * Must be initialized with valid values (like NULLs).
219 * 3 : require_protocol = Whether or not URLs without
220 * protocol are acceptable.
222 * Returns : JB_ERR_OK on success
223 * JB_ERR_PARSE on malformed command/URL
224 * or >100 domains deep.
226 *********************************************************************/
227 jb_err parse_http_url(const char *url, struct http_request *http, int require_protocol)
229 int host_available = 1; /* A proxy can dream. */
232 * Save our initial URL
234 http->url = strdup_or_die(url);
237 * Check for * URI. If found, we're done.
239 if (*http->url == '*')
241 http->path = strdup_or_die("*");
242 http->hostport = strdup_or_die("");
243 if (http->url[1] != '\0')
252 * Split URL into protocol,hostport,path.
259 buf = strdup_or_die(url);
261 /* Find the start of the URL in our scratch space */
263 if (strncmpic(url_noproto, "http://", 7) == 0)
267 else if (strncmpic(url_noproto, "https://", 8) == 0)
270 * Should only happen when called from cgi_show_url_info().
275 else if (*url_noproto == '/')
278 * Short request line without protocol and host.
279 * Most likely because the client's request
280 * was intercepted and redirected into Privoxy.
285 else if (require_protocol)
291 url_path = strchr(url_noproto, '/');
292 if (url_path != NULL)
297 * NOTE: The following line ignores the path for HTTPS URLS.
298 * This means that you get consistent behaviour if you type a
299 * https URL in and it's parsed by the function. (When the
300 * URL is actually retrieved, SSL hides the path part).
302 http->path = strdup_or_die(http->ssl ? "/" : url_path);
304 http->hostport = strdup_or_die(url_noproto);
309 * Repair broken HTTP requests that don't contain a path,
310 * or CONNECT requests
312 http->path = strdup_or_die("/");
313 http->hostport = strdup_or_die(url_noproto);
321 /* Without host, there is nothing left to do here */
326 * Split hostport into user/password (ignored), host, port.
333 buf = strdup_or_die(http->hostport);
335 /* check if url contains username and/or password */
336 host = strchr(buf, '@');
339 /* Contains username/password, skip it and the @ sign. */
344 /* No username or password. */
348 /* Move after hostname before port number */
351 /* Numeric IPv6 address delimited by brackets */
353 port = strchr(host, ']');
357 /* Missing closing bracket */
368 else if (*port != ':')
370 /* Garbage after closing bracket */
377 /* Plain non-escaped hostname */
378 port = strchr(host, ':');
381 /* check if url contains port */
387 /* Terminate hostname and point to start of port string */
389 parsed_port = strtol(port, &endptr, 10);
390 if ((parsed_port <= 0) || (parsed_port > 65535) || (*endptr != '\0'))
392 log_error(LOG_LEVEL_ERROR, "Invalid port in URL: %s.", url);
396 http->port = (int)parsed_port;
400 /* No port specified. */
401 http->port = (http->ssl ? 443 : 80);
404 http->host = strdup_or_die(host);
409 #ifdef FEATURE_EXTENDED_HOST_PATTERNS
412 /* Split domain name so we can compare it against wildcards */
413 return init_domain_components(http);
414 #endif /* def FEATURE_EXTENDED_HOST_PATTERNS */
419 /*********************************************************************
421 * Function : unknown_method
423 * Description : Checks whether a method is unknown.
426 * 1 : method = points to a http method
428 * Returns : TRUE if it's unknown, FALSE otherwise.
430 *********************************************************************/
431 static int unknown_method(const char *method)
433 static const char * const known_http_methods[] = {
434 /* Basic HTTP request type */
435 "GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS", "TRACE", "CONNECT",
436 /* webDAV extensions (RFC2518) */
437 "PROPFIND", "PROPPATCH", "MOVE", "COPY", "MKCOL", "LOCK", "UNLOCK",
439 * Microsoft webDAV extension for Exchange 2000. See:
440 * http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html
441 * http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp
443 "BCOPY", "BMOVE", "BDELETE", "BPROPFIND", "BPROPPATCH",
445 * Another Microsoft webDAV extension for Exchange 2000. See:
446 * http://systems.cs.colorado.edu/grunwald/MobileComputing/Papers/draft-cohen-gena-p-base-00.txt
447 * http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html
448 * http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp
450 "SUBSCRIBE", "UNSUBSCRIBE", "NOTIFY", "POLL",
452 * Yet another WebDAV extension, this time for
453 * Web Distributed Authoring and Versioning (RFC3253)
455 "VERSION-CONTROL", "REPORT", "CHECKOUT", "CHECKIN", "UNCHECKOUT",
456 "MKWORKSPACE", "UPDATE", "LABEL", "MERGE", "BASELINE-CONTROL", "MKACTIVITY",
460 for (i = 0; i < SZ(known_http_methods); i++)
462 if (0 == strcmpic(method, known_http_methods[i]))
473 /*********************************************************************
475 * Function : parse_http_request
477 * Description : Parse out the host and port from the URL. Find the
478 * hostname & path, port (if ':'), and/or password (if '@')
481 * 1 : req = HTTP request line to break down
482 * 2 : http = pointer to the http structure to hold elements
484 * Returns : JB_ERR_OK on success
485 * JB_ERR_CGI_PARAMS on malformed command/URL
486 * or >100 domains deep.
488 *********************************************************************/
489 jb_err parse_http_request(const char *req, struct http_request *http)
496 memset(http, '\0', sizeof(*http));
498 buf = strdup_or_die(req);
500 n = ssplit(buf, " \r\n", v, SZ(v));
508 * Fail in case of unknown methods
509 * which we might not handle correctly.
511 * XXX: There should be a config option
512 * to forward requests with unknown methods
513 * anyway. Most of them don't need special
516 if (unknown_method(v[0]))
518 log_error(LOG_LEVEL_ERROR, "Unknown HTTP method detected: %s", v[0]);
523 if (strcmpic(v[2], "HTTP/1.1") && strcmpic(v[2], "HTTP/1.0"))
525 log_error(LOG_LEVEL_ERROR, "The only supported HTTP "
526 "versions are 1.0 and 1.1. This rules out: %s", v[2]);
531 http->ssl = !strcmpic(v[0], "CONNECT");
533 err = parse_http_url(v[1], http, !http->ssl);
541 * Copy the details into the structure
543 http->cmd = strdup_or_die(req);
544 http->gpc = strdup_or_die(v[0]);
545 http->ver = strdup_or_die(v[2]);
546 http->ocmd = strdup_or_die(http->cmd);
555 /*********************************************************************
557 * Function : compile_pattern
559 * Description : Compiles a host, domain or TAG pattern.
562 * 1 : pattern = The pattern to compile.
563 * 2 : anchoring = How the regex should be modified
564 * before compilation. Can be either
565 * one of NO_ANCHORING, LEFT_ANCHORED,
566 * RIGHT_ANCHORED or RIGHT_ANCHORED_HOST.
567 * 3 : url = In case of failures, the spec member is
568 * logged and the structure freed.
569 * 4 : regex = Where the compiled regex should be stored.
571 * Returns : JB_ERR_OK - Success
572 * JB_ERR_MEMORY - Out of memory
573 * JB_ERR_PARSE - Cannot parse regex
575 *********************************************************************/
576 static jb_err compile_pattern(const char *pattern, enum regex_anchoring anchoring,
577 struct pattern_spec *url, regex_t **regex)
580 char rebuf[BUFFER_SIZE];
581 const char *fmt = NULL;
584 assert(strlen(pattern) < sizeof(rebuf) - 2);
586 if (pattern[0] == '\0')
600 case RIGHT_ANCHORED_HOST:
607 log_error(LOG_LEVEL_FATAL,
608 "Invalid anchoring in compile_pattern %d", anchoring);
611 *regex = zalloc(sizeof(**regex));
614 free_pattern_spec(url);
615 return JB_ERR_MEMORY;
618 snprintf(rebuf, sizeof(rebuf), fmt, pattern);
620 errcode = regcomp(*regex, rebuf, (REG_EXTENDED|REG_NOSUB|REG_ICASE));
624 size_t errlen = regerror(errcode, *regex, rebuf, sizeof(rebuf));
625 if (errlen > (sizeof(rebuf) - (size_t)1))
627 errlen = sizeof(rebuf) - (size_t)1;
629 rebuf[errlen] = '\0';
630 log_error(LOG_LEVEL_ERROR, "error compiling %s from %s: %s",
631 pattern, url->spec, rebuf);
632 free_pattern_spec(url);
642 /*********************************************************************
644 * Function : compile_url_pattern
646 * Description : Compiles the three parts of an URL pattern.
649 * 1 : url = Target pattern_spec to be filled in.
650 * 2 : buf = The url pattern to compile. Will be messed up.
652 * Returns : JB_ERR_OK - Success
653 * JB_ERR_MEMORY - Out of memory
654 * JB_ERR_PARSE - Cannot parse regex
656 *********************************************************************/
657 static jb_err compile_url_pattern(struct pattern_spec *url, char *buf)
661 p = strchr(buf, '/');
665 * Only compile the regex if it consists of more than
666 * a single slash, otherwise it wouldn't affect the result.
671 * XXX: does it make sense to compile the slash at the beginning?
673 jb_err err = compile_pattern(p, LEFT_ANCHORED, url, &url->pattern.url_spec.preg);
675 if (JB_ERR_OK != err)
684 * IPv6 numeric hostnames can contain colons, thus we need
685 * to delimit the hostname before the real port separator.
686 * As brackets are already used in the hostname pattern,
687 * we use angle brackets ('<', '>') instead.
689 if ((buf[0] == '<') && (NULL != (p = strchr(buf + 1, '>'))))
696 /* IPv6 address without port number */
701 /* Garbage after address delimiter */
707 p = strchr(buf, ':');
713 url->pattern.url_spec.port_list = strdup_or_die(p);
717 url->pattern.url_spec.port_list = NULL;
722 return compile_host_pattern(url, buf);
730 #ifdef FEATURE_EXTENDED_HOST_PATTERNS
731 /*********************************************************************
733 * Function : compile_host_pattern
735 * Description : Parses and compiles a host pattern.
738 * 1 : url = Target pattern_spec to be filled in.
739 * 2 : host_pattern = Host pattern to compile.
741 * Returns : JB_ERR_OK - Success
742 * JB_ERR_MEMORY - Out of memory
743 * JB_ERR_PARSE - Cannot parse regex
745 *********************************************************************/
746 static jb_err compile_host_pattern(struct pattern_spec *url, const char *host_pattern)
748 return compile_pattern(host_pattern, RIGHT_ANCHORED_HOST, url, &url->pattern.url_spec.host_regex);
753 /*********************************************************************
755 * Function : compile_host_pattern
757 * Description : Parses and "compiles" an old-school host pattern.
760 * 1 : url = Target pattern_spec to be filled in.
761 * 2 : host_pattern = Host pattern to parse.
763 * Returns : JB_ERR_OK - Success
764 * JB_ERR_PARSE - Cannot parse regex
766 *********************************************************************/
767 static jb_err compile_host_pattern(struct pattern_spec *url, const char *host_pattern)
776 if (host_pattern[strlen(host_pattern) - 1] == '.')
778 url->pattern.url_spec.unanchored |= ANCHOR_RIGHT;
780 if (host_pattern[0] == '.')
782 url->pattern.url_spec.unanchored |= ANCHOR_LEFT;
786 * Split domain into components
788 url->pattern.url_spec.dbuffer = strdup_or_die(host_pattern);
793 for (p = url->pattern.url_spec.dbuffer; *p ; p++)
795 *p = (char)privoxy_tolower(*p);
799 * Split the domain name into components
801 url->pattern.url_spec.dcount = ssplit(url->pattern.url_spec.dbuffer, ".", v, SZ(v));
803 if (url->pattern.url_spec.dcount < 0)
805 free_pattern_spec(url);
808 else if (url->pattern.url_spec.dcount != 0)
811 * Save a copy of the pointers in dvec
813 size = (size_t)url->pattern.url_spec.dcount * sizeof(*url->pattern.url_spec.dvec);
815 url->pattern.url_spec.dvec = malloc_or_die(size);
817 memcpy(url->pattern.url_spec.dvec, v, size);
820 * else dcount == 0 in which case we needn't do anything,
821 * since dvec will never be accessed and the pattern will
828 /*********************************************************************
830 * Function : simplematch
832 * Description : String matching, with a (greedy) '*' wildcard that
833 * stands for zero or more arbitrary characters and
834 * character classes in [], which take both enumerations
838 * 1 : pattern = pattern for matching
839 * 2 : text = text to be matched
841 * Returns : 0 if match, else nonzero
843 *********************************************************************/
844 static int simplematch(const char *pattern, const char *text)
846 const unsigned char *pat = (const unsigned char *)pattern;
847 const unsigned char *txt = (const unsigned char *)text;
848 const unsigned char *fallback = pat;
851 unsigned char lastchar = 'a';
853 unsigned char charmap[32];
858 /* EOF pattern but !EOF text? */
871 /* '*' in the pattern? */
875 /* The pattern ends afterwards? Speed up the return. */
881 /* Else, set wildcard mode and remember position after '*' */
886 /* Character range specification? */
889 memset(charmap, '\0', sizeof(charmap));
891 while (*++pat != ']')
897 else if (*pat == '-')
899 if ((*++pat == ']') || *pat == '\0')
903 for (i = lastchar; i <= *pat; i++)
905 charmap[i / 8] |= (unsigned char)(1 << (i % 8));
910 charmap[*pat / 8] |= (unsigned char)(1 << (*pat % 8));
914 } /* -END- if Character range specification */
918 * Char match, or char range match?
922 || ((*pat == ']') && (charmap[*txt / 8] & (1 << (*txt % 8)))))
932 * No match && no wildcard: No luck
936 else if (pat != fallback)
939 * Increment text pointer if in char range matching
946 * Wildcard mode && nonmatch beyond fallback: Rewind pattern
950 * Restart matching from current text pointer
957 /* Cut off extra '*'s */
958 if (*pat == '*') pat++;
960 /* If this is the pattern's end, fine! */
966 /*********************************************************************
968 * Function : simple_domaincmp
970 * Description : Domain-wise Compare fqdn's. The comparison is
971 * both left- and right-anchored. The individual
972 * domain names are compared with simplematch().
973 * This is only used by domain_match.
976 * 1 : pv = array of patterns to compare
977 * 2 : fv = array of domain components to compare
978 * 3 : len = length of the arrays (both arrays are the
979 * same length - if they weren't, it couldn't
980 * possibly be a match).
982 * Returns : 0 => domains are equivalent, else no match.
984 *********************************************************************/
985 static int simple_domaincmp(char **pv, char **fv, int len)
989 for (n = 0; n < len; n++)
991 if (simplematch(pv[n], fv[n]))
1002 /*********************************************************************
1004 * Function : domain_match
1006 * Description : Domain-wise Compare fqdn's. Governed by the bimap in
1007 * p.pattern->unachored, the comparison is un-, left-,
1008 * right-anchored, or both.
1009 * The individual domain names are compared with
1013 * 1 : p = a domain that may contain a '*' as a wildcard.
1014 * 2 : fqdn = domain name against which the patterns are compared.
1016 * Returns : 0 => domains are equivalent, else no match.
1018 *********************************************************************/
1019 static int domain_match(const struct pattern_spec *p, const struct http_request *fqdn)
1021 char **pv, **fv; /* vectors */
1023 int unanchored = p->pattern.url_spec.unanchored & (ANCHOR_RIGHT | ANCHOR_LEFT);
1025 plen = p->pattern.url_spec.dcount;
1026 flen = fqdn->dcount;
1030 /* fqdn is too short to match this pattern */
1034 pv = p->pattern.url_spec.dvec;
1037 if (unanchored == ANCHOR_LEFT)
1042 * Convert this into a fully anchored pattern with
1043 * the fqdn and pattern the same length
1045 fv += (flen - plen); /* flen - plen >= 0 due to check above */
1046 return simple_domaincmp(pv, fv, plen);
1048 else if (unanchored == 0)
1050 /* Fully anchored, check length */
1055 return simple_domaincmp(pv, fv, plen);
1057 else if (unanchored == ANCHOR_RIGHT)
1059 /* Left anchored, ignore all extra in fqdn */
1060 return simple_domaincmp(pv, fv, plen);
1066 int maxn = flen - plen;
1067 for (n = 0; n <= maxn; n++)
1069 if (!simple_domaincmp(pv, fv, plen))
1074 * Doesn't match from start of fqdn
1075 * Try skipping first part of fqdn
1083 #endif /* def FEATURE_EXTENDED_HOST_PATTERNS */
1086 /*********************************************************************
1088 * Function : create_pattern_spec
1090 * Description : Creates a "pattern_spec" structure from a string.
1091 * When finished, free with free_pattern_spec().
1094 * 1 : pattern = Target pattern_spec to be filled in.
1095 * Will be zeroed before use.
1096 * 2 : buf = Source pattern, null terminated. NOTE: The
1097 * contents of this buffer are destroyed by this
1098 * function. If this function succeeds, the
1099 * buffer is copied to pattern->spec. If this
1100 * function fails, the contents of the buffer
1103 * Returns : JB_ERR_OK - Success
1104 * JB_ERR_PARSE - Cannot parse regex (Detailed message
1105 * written to system log)
1107 *********************************************************************/
1108 jb_err create_pattern_spec(struct pattern_spec *pattern, char *buf)
1112 /** The tag pattern prefix to match */
1115 /** The length of the prefix to match */
1116 const size_t prefix_length;
1118 /** The pattern flag */
1119 const unsigned flag;
1121 { "TAG:", 4, PATTERN_SPEC_TAG_PATTERN},
1122 { "NO-REQUEST-TAG:", 15, PATTERN_SPEC_NO_REQUEST_TAG_PATTERN},
1123 { "NO-RESPONSE-TAG:", 16, PATTERN_SPEC_NO_RESPONSE_TAG_PATTERN}
1130 memset(pattern, '\0', sizeof(*pattern));
1132 /* Remember the original specification for the CGI pages. */
1133 pattern->spec = strdup_or_die(buf);
1135 /* Check if it's a tag pattern */
1136 for (i = 0; i < SZ(tag_pattern); i++)
1138 if (0 == strncmpic(pattern->spec, tag_pattern[i].prefix, tag_pattern[i].prefix_length))
1140 /* The regex starts after the prefix */
1141 const char *tag_regex = buf + tag_pattern[i].prefix_length;
1143 pattern->flags |= tag_pattern[i].flag;
1145 return compile_pattern(tag_regex, NO_ANCHORING, pattern,
1146 &pattern->pattern.tag_regex);
1150 /* If it isn't a tag pattern it must be an URL pattern. */
1151 pattern->flags |= PATTERN_SPEC_URL_PATTERN;
1153 return compile_url_pattern(pattern, buf);
1158 /*********************************************************************
1160 * Function : free_pattern_spec
1162 * Description : Called from the "unloaders". Freez the pattern
1163 * structure elements.
1166 * 1 : pattern = pointer to a pattern_spec structure.
1170 *********************************************************************/
1171 void free_pattern_spec(struct pattern_spec *pattern)
1173 if (pattern == NULL) return;
1175 freez(pattern->spec);
1176 #ifdef FEATURE_EXTENDED_HOST_PATTERNS
1177 if (pattern->pattern.url_spec.host_regex)
1179 regfree(pattern->pattern.url_spec.host_regex);
1180 freez(pattern->pattern.url_spec.host_regex);
1183 freez(pattern->pattern.url_spec.dbuffer);
1184 freez(pattern->pattern.url_spec.dvec);
1185 pattern->pattern.url_spec.dcount = 0;
1186 #endif /* ndef FEATURE_EXTENDED_HOST_PATTERNS */
1187 freez(pattern->pattern.url_spec.port_list);
1188 if (pattern->pattern.url_spec.preg)
1190 regfree(pattern->pattern.url_spec.preg);
1191 freez(pattern->pattern.url_spec.preg);
1193 if (pattern->pattern.tag_regex)
1195 regfree(pattern->pattern.tag_regex);
1196 freez(pattern->pattern.tag_regex);
1201 /*********************************************************************
1203 * Function : port_matches
1205 * Description : Compares a port against a port list.
1208 * 1 : port = The port to check.
1209 * 2 : port_list = The list of port to compare with.
1211 * Returns : TRUE for yes, FALSE otherwise.
1213 *********************************************************************/
1214 static int port_matches(const int port, const char *port_list)
1216 return ((NULL == port_list) || match_portlist(port_list, port));
1220 /*********************************************************************
1222 * Function : host_matches
1224 * Description : Compares a host against a host pattern.
1227 * 1 : url = The URL to match
1228 * 2 : pattern = The URL pattern
1230 * Returns : TRUE for yes, FALSE otherwise.
1232 *********************************************************************/
1233 static int host_matches(const struct http_request *http,
1234 const struct pattern_spec *pattern)
1236 #ifdef FEATURE_EXTENDED_HOST_PATTERNS
1237 return ((NULL == pattern->pattern.url_spec.host_regex)
1238 || (0 == regexec(pattern->pattern.url_spec.host_regex, http->host, 0, NULL, 0)));
1240 return ((NULL == pattern->pattern.url_spec.dbuffer) || (0 == domain_match(pattern, http)));
1245 /*********************************************************************
1247 * Function : path_matches
1249 * Description : Compares a path against a path pattern.
1252 * 1 : path = The path to match
1253 * 2 : pattern = The URL pattern
1255 * Returns : TRUE for yes, FALSE otherwise.
1257 *********************************************************************/
1258 static int path_matches(const char *path, const struct pattern_spec *pattern)
1260 return ((NULL == pattern->pattern.url_spec.preg)
1261 || (0 == regexec(pattern->pattern.url_spec.preg, path, 0, NULL, 0)));
1265 /*********************************************************************
1267 * Function : url_match
1269 * Description : Compare a URL against a URL pattern.
1272 * 1 : pattern = a URL pattern
1273 * 2 : url = URL to match
1275 * Returns : Nonzero if the URL matches the pattern, else 0.
1277 *********************************************************************/
1278 int url_match(const struct pattern_spec *pattern,
1279 const struct http_request *http)
1281 if (!(pattern->flags & PATTERN_SPEC_URL_PATTERN))
1283 /* It's not an URL pattern and thus shouldn't be matched against URLs */
1287 return (port_matches(http->port, pattern->pattern.url_spec.port_list)
1288 && host_matches(http, pattern) && path_matches(http->path, pattern));
1293 /*********************************************************************
1295 * Function : match_portlist
1297 * Description : Check if a given number is covered by a comma
1298 * separated list of numbers and ranges (a,b-c,d,..)
1301 * 1 : portlist = String with list
1302 * 2 : port = port to check
1304 * Returns : 0 => no match
1307 *********************************************************************/
1308 int match_portlist(const char *portlist, int port)
1310 char *min, *max, *next, *portlist_copy;
1312 min = portlist_copy = strdup_or_die(portlist);
1315 * Zero-terminate first item and remember offset for next
1317 if (NULL != (next = strchr(portlist_copy, (int) ',')))
1323 * Loop through all items, checking for match
1327 if (NULL == (max = strchr(min, (int) '-')))
1330 * No dash, check for equality
1332 if (port == atoi(min))
1334 freez(portlist_copy);
1341 * This is a range, so check if between min and max,
1342 * or, if max was omitted, between min and 65K
1345 if (port >= atoi(min) && port <= (atoi(max) ? atoi(max) : 65535))
1347 freez(portlist_copy);
1359 * Zero-terminate next item and remember offset for n+1
1361 if ((NULL != next) && (NULL != (next = strchr(next, (int) ','))))
1367 freez(portlist_copy);
1373 /*********************************************************************
1375 * Function : parse_forwarder_address
1377 * Description : Parse out the host and port from a forwarder address.
1380 * 1 : address = The forwarder address to parse.
1381 * 2 : hostname = Used to return the hostname. NULL on error.
1382 * 3 : port = Used to return the port. Untouched if no port
1385 * Returns : JB_ERR_OK on success
1386 * JB_ERR_MEMORY on out of memory
1387 * JB_ERR_PARSE on malformed address.
1389 *********************************************************************/
1390 jb_err parse_forwarder_address(char *address, char **hostname, int *port)
1394 if ((*address == '[') && (NULL == strchr(address, ']')))
1396 /* XXX: Should do some more validity checks here. */
1397 return JB_ERR_PARSE;
1400 *hostname = strdup_or_die(address);
1402 if ((**hostname == '[') && (NULL != (p = strchr(*hostname, ']'))))
1405 memmove(*hostname, (*hostname + 1), (size_t)(p - *hostname));
1408 *port = (int)strtol(++p, NULL, 0);
1411 else if (NULL != (p = strchr(*hostname, ':')))
1414 *port = (int)strtol(p, NULL, 0);