X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=urlmatch.c;h=3e4e621ecf1918e7c7eb090a57305996d696545c;hp=84eb90a8e7760c0f4509251cd6013c975b0d9322;hb=41a08949498020a8f9ec18c08e16141057ebd546;hpb=72081f829de368392d04076728f8c991178c0080 diff --git a/urlmatch.c b/urlmatch.c index 84eb90a8..3e4e621e 100644 --- a/urlmatch.c +++ b/urlmatch.c @@ -1,12 +1,12 @@ -const char urlmatch_rcs[] = "$Id: urlmatch.c,v 1.10.2.7 2003/05/17 15:57:24 oes Exp $"; +const char urlmatch_rcs[] = "$Id: urlmatch.c,v 1.20 2007/09/02 15:31:20 fabiankeil Exp $"; /********************************************************************* * - * File : $Source: /cvsroot/ijbswa/current/Attic/urlmatch.c,v $ + * File : $Source: /cvsroot/ijbswa/current/urlmatch.c,v $ * * Purpose : Declares functions to match URLs against URL * patterns. * - * Copyright : Written by and Copyright (C) 2001 the SourceForge + * Copyright : Written by and Copyright (C) 2001-2003, 2006-2007 the SourceForge * Privoxy team. http://www.privoxy.org/ * * Based on the Internet Junkbuster originally written @@ -33,6 +33,47 @@ const char urlmatch_rcs[] = "$Id: urlmatch.c,v 1.10.2.7 2003/05/17 15:57:24 oes * * Revisions : * $Log: urlmatch.c,v $ + * Revision 1.20 2007/09/02 15:31:20 fabiankeil + * Move match_portlist() from filter.c to urlmatch.c. + * It's used for url matching, not for filtering. + * + * Revision 1.19 2007/09/02 13:42:11 fabiankeil + * - Allow port lists in url patterns. + * - Ditch unused url_spec member pathlen. + * + * Revision 1.18 2007/07/30 16:42:21 fabiankeil + * Move the method check into unknown_method() + * and loop through the known methods instead + * of using a screen-long OR chain. + * + * Revision 1.17 2007/04/15 16:39:21 fabiankeil + * Introduce tags as alternative way to specify which + * actions apply to a request. At the moment tags can be + * created based on client and server headers. + * + * Revision 1.16 2007/02/13 13:59:24 fabiankeil + * Remove redundant log message. + * + * Revision 1.15 2007/01/28 16:11:23 fabiankeil + * Accept WebDAV methods for subversion + * in parse_http_request(). Closes FR 1581425. + * + * Revision 1.14 2007/01/06 14:23:56 fabiankeil + * Fix gcc43 warnings. Mark *csp as immutable + * for parse_http_url() and url_match(). + * Replace a sprintf call with snprintf. + * + * Revision 1.13 2006/12/06 19:50:54 fabiankeil + * parse_http_url() now handles intercepted + * HTTP request lines as well. Moved parts + * of parse_http_url()'s code into + * init_domain_components() so that it can + * be reused in chat(). + * + * Revision 1.12 2006/07/18 14:48:47 david__schmidt + * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch) + * with what was really the latest development (the v_3_0_branch branch) + * * Revision 1.10.2.7 2003/05/17 15:57:24 oes * - parse_http_url now checks memory allocation failure for * duplication of "*" URL and rejects "*something" URLs @@ -167,6 +208,69 @@ void free_http_request(struct http_request *http) http->dcount = 0; } +/********************************************************************* + * + * Function : init_domain_components + * + * Description : Splits the domain name so we can compare it + * against wildcards. It used to be part of + * parse_http_url, but was separated because the + * same code is required in chat in case of + * intercepted requests. + * + * Parameters : + * 1 : http = pointer to the http structure to hold elements. + * + * Returns : JB_ERR_OK on success + * JB_ERR_MEMORY on out of memory + * JB_ERR_PARSE on malformed command/URL + * or >100 domains deep. + * + *********************************************************************/ +jb_err init_domain_components(struct http_request *http) +{ + char *vec[BUFFER_SIZE]; + size_t size; + char *p; + + http->dbuffer = strdup(http->host); + if (NULL == http->dbuffer) + { + return JB_ERR_MEMORY; + } + + /* map to lower case */ + for (p = http->dbuffer; *p ; p++) + { + *p = (char)tolower((int)(unsigned char)*p); + } + + /* split the domain name into components */ + http->dcount = ssplit(http->dbuffer, ".", vec, SZ(vec), 1, 1); + + if (http->dcount <= 0) + { + /* + * Error: More than SZ(vec) components in domain + * or: no components in domain + */ + log_error(LOG_LEVEL_ERROR, "More than SZ(vec) components in domain or none at all."); + return JB_ERR_PARSE; + } + + /* save a copy of the pointers in dvec */ + size = (size_t)http->dcount * sizeof(*http->dvec); + + http->dvec = (char **)malloc(size); + if (NULL == http->dvec) + { + return JB_ERR_MEMORY; + } + + memcpy(http->dvec, vec, size); + + return JB_ERR_OK; +} /********************************************************************* * @@ -191,8 +295,10 @@ void free_http_request(struct http_request *http) *********************************************************************/ jb_err parse_http_url(const char * url, struct http_request *http, - struct client_state *csp) + const struct client_state *csp) { + int host_available = 1; /* A proxy can dream. */ + /* * Zero out the results structure */ @@ -253,6 +359,17 @@ jb_err parse_http_url(const char * url, url_noproto += 8; http->ssl = 1; } + else if (*url_noproto == '/') + { + /* + * Short request line without protocol and host. + * Most likely because the client's request + * was intercepted and redirected into Privoxy. + */ + http->ssl = 0; + http->host = NULL; + host_available = 0; + } else { http->ssl = 0; @@ -292,6 +409,11 @@ jb_err parse_http_url(const char * url, } } + if (!host_available) + { + /* Without host, there is nothing left to do here */ + return JB_ERR_OK; + } /* * Split hostport into user/password (ignored), host, port. @@ -348,49 +470,62 @@ jb_err parse_http_url(const char * url, /* * Split domain name so we can compare it against wildcards */ + return init_domain_components(http); - { - char *vec[BUFFER_SIZE]; - size_t size; - char *p; - - http->dbuffer = strdup(http->host); - if (NULL == http->dbuffer) - { - return JB_ERR_MEMORY; - } - - /* map to lower case */ - for (p = http->dbuffer; *p ; p++) - { - *p = tolower((int)(unsigned char)*p); - } - - /* split the domain name into components */ - http->dcount = ssplit(http->dbuffer, ".", vec, SZ(vec), 1, 1); +} - if (http->dcount <= 0) - { - /* - * Error: More than SZ(vec) components in domain - * or: no components in domain - */ - return JB_ERR_PARSE; - } - /* save a copy of the pointers in dvec */ - size = http->dcount * sizeof(*http->dvec); +/********************************************************************* + * + * Function : unknown_method + * + * Description : Checks whether a method is unknown. + * + * Parameters : + * 1 : method = points to a http method + * + * Returns : TRUE if it's unknown, FALSE otherwise. + * + *********************************************************************/ +static int unknown_method(const char *method) +{ + static const char *known_http_methods[] = { + /* Basic HTTP request type */ + "GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS", "TRACE", "CONNECT", + /* webDAV extensions (RFC2518) */ + "PROPFIND", "PROPPATCH", "MOVE", "COPY", "MKCOL", "LOCK", "UNLOCK", + /* + * Microsoft webDAV extension for Exchange 2000. See: + * http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html + * http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp + */ + "BCOPY", "BMOVE", "BDELETE", "BPROPFIND", "BPROPPATCH", + /* + * Another Microsoft webDAV extension for Exchange 2000. See: + * http://systems.cs.colorado.edu/grunwald/MobileComputing/Papers/draft-cohen-gena-p-base-00.txt + * http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html + * http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp + */ + "SUBSCRIBE", "UNSUBSCRIBE", "NOTIFY", "POLL", + /* + * Yet another WebDAV extension, this time for + * Web Distributed Authoring and Versioning (RFC3253) + */ + "VERSION-CONTROL", "REPORT", "CHECKOUT", "CHECKIN", "UNCHECKOUT", + "MKWORKSPACE", "UPDATE", "LABEL", "MERGE", "BASELINE-CONTROL", "MKACTIVITY", + NULL + }; + int i; - http->dvec = (char **)malloc(size); - if (NULL == http->dvec) + for (i = 0; NULL != known_http_methods[i]; i++) + { + if (0 == strcmpic(method, known_http_methods[i])) { - return JB_ERR_MEMORY; + return FALSE; } - - memcpy(http->dvec, vec, size); } - return JB_ERR_OK; + return TRUE; } @@ -415,10 +550,10 @@ jb_err parse_http_url(const char * url, *********************************************************************/ jb_err parse_http_request(const char *req, struct http_request *http, - struct client_state *csp) + const struct client_state *csp) { char *buf; - char *v[10]; + char *v[10]; /* XXX: Why 10? We should only need three. */ int n; jb_err err; int is_connect = 0; @@ -438,59 +573,27 @@ jb_err parse_http_request(const char *req, return JB_ERR_PARSE; } - /* this could be a CONNECT request */ - if (strcmpic(v[0], "connect") == 0) - { - /* Secure */ - is_connect = 1; - } - /* or it could be any other basic HTTP request type */ - else if ((0 == strcmpic(v[0], "get")) - || (0 == strcmpic(v[0], "head")) - || (0 == strcmpic(v[0], "post")) - || (0 == strcmpic(v[0], "put")) - || (0 == strcmpic(v[0], "delete")) - || (0 == strcmpic(v[0], "options")) - || (0 == strcmpic(v[0], "trace")) - - /* or a webDAV extension (RFC2518) */ - || (0 == strcmpic(v[0], "propfind")) - || (0 == strcmpic(v[0], "proppatch")) - || (0 == strcmpic(v[0], "move")) - || (0 == strcmpic(v[0], "copy")) - || (0 == strcmpic(v[0], "mkcol")) - || (0 == strcmpic(v[0], "lock")) - || (0 == strcmpic(v[0], "unlock")) - - /* Or a Microsoft webDAV extension for Exchange 2000. See: */ - /* http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html */ - /* http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp */ - || (0 == strcmpic(v[0], "bcopy")) - || (0 == strcmpic(v[0], "bmove")) - || (0 == strcmpic(v[0], "bdelete")) - || (0 == strcmpic(v[0], "bpropfind")) - || (0 == strcmpic(v[0], "bproppatch")) - - /* Or another Microsoft webDAV extension for Exchange 2000. See: */ - /* http://systems.cs.colorado.edu/grunwald/MobileComputing/Papers/draft-cohen-gena-p-base-00.txt */ - /* http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html */ - /* http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp */ - || (0 == strcmpic(v[0], "subscribe")) - || (0 == strcmpic(v[0], "unsubscribe")) - || (0 == strcmpic(v[0], "notify")) - || (0 == strcmpic(v[0], "poll")) - ) - { - /* Normal */ - is_connect = 0; - } - else + /* + * Fail in case of unknown methods + * which we might not handle correctly. + * + * XXX: There should be a config option + * to forward requests with unknown methods + * anyway. Most of them don't need special + * steps. + */ + if (unknown_method(v[0])) { - /* Unknown HTTP method */ + log_error(LOG_LEVEL_ERROR, "Unknown HTTP method detected: %s", v[0]); free(buf); return JB_ERR_PARSE; } + if (strcmpic(v[0], "CONNECT") == 0) + { + is_connect = 1; + } + err = parse_http_url(v[1], http, csp); if (err) { @@ -665,6 +768,9 @@ static int domain_match(const struct url_spec *pattern, const struct http_reques jb_err create_url_spec(struct url_spec * url, const char * buf) { char *p; + int errcode; + size_t errlen; + char rebuf[BUFFER_SIZE]; assert(url); assert(buf); @@ -682,26 +788,55 @@ jb_err create_url_spec(struct url_spec * url, const char * buf) return JB_ERR_MEMORY; } - if ((p = strchr(buf, '/')) != NULL) + /* Is it tag pattern? */ + if (0 == strncmpic("TAG:", url->spec, 4)) { - if (NULL == (url->path = strdup(p))) + if (NULL == (url->tag_regex = zalloc(sizeof(*url->tag_regex)))) + { + freez(url->spec); + return JB_ERR_MEMORY; + } + + /* buf + 4 to skip "TAG:" */ + errcode = regcomp(url->tag_regex, buf + 4, (REG_EXTENDED|REG_NOSUB|REG_ICASE)); + if (errcode) + { + errlen = regerror(errcode, url->preg, rebuf, sizeof(rebuf)); + if (errlen > (sizeof(rebuf) - 1)) + { + errlen = sizeof(rebuf) - 1; + } + rebuf[errlen] = '\0'; + + log_error(LOG_LEVEL_ERROR, "error compiling %s: %s", url->spec, rebuf); + + freez(url->spec); + regfree(url->tag_regex); + freez(url->tag_regex); + + return JB_ERR_PARSE; + } + return JB_ERR_OK; + } + + /* Only reached for URL patterns */ + p = strchr(buf, '/'); + if (NULL != p) + { + url->path = strdup(p); + if (NULL == url->path) { freez(url->spec); return JB_ERR_MEMORY; } - url->pathlen = strlen(url->path); *p = '\0'; } else { - url->path = NULL; - url->pathlen = 0; + url->path = NULL; } if (url->path) { - int errcode; - char rebuf[BUFFER_SIZE]; - if (NULL == (url->preg = zalloc(sizeof(*url->preg)))) { freez(url->spec); @@ -709,14 +844,13 @@ jb_err create_url_spec(struct url_spec * url, const char * buf) return JB_ERR_MEMORY; } - sprintf(rebuf, "^(%s)", url->path); + snprintf(rebuf, sizeof(rebuf), "^(%s)", url->path); errcode = regcomp(url->preg, rebuf, (REG_EXTENDED|REG_NOSUB|REG_ICASE)); if (errcode) { - size_t errlen = regerror(errcode, - url->preg, rebuf, sizeof(rebuf)); + errlen = regerror(errcode, url->preg, rebuf, sizeof(rebuf)); if (errlen > (sizeof(rebuf) - (size_t)1)) { @@ -735,14 +869,20 @@ jb_err create_url_spec(struct url_spec * url, const char * buf) return JB_ERR_PARSE; } } - if ((p = strchr(buf, ':')) == NULL) + + p = strchr(buf, ':'); + if (NULL != p) { - url->port = 0; + *p++ = '\0'; + url->port_list = strdup(p); + if (NULL == url->port_list) + { + return JB_ERR_MEMORY; + } } else { - *p++ = '\0'; - url->port = atoi(p); + url->port_list = NULL; } if (buf[0] != '\0') @@ -780,7 +920,7 @@ jb_err create_url_spec(struct url_spec * url, const char * buf) */ for (p = url->dbuffer; *p ; p++) { - *p = tolower((int)(unsigned char)*p); + *p = (char)tolower((int)(unsigned char)*p); } /* @@ -804,7 +944,7 @@ jb_err create_url_spec(struct url_spec * url, const char * buf) /* * Save a copy of the pointers in dvec */ - size = url->dcount * sizeof(*url->dvec); + size = (size_t)url->dcount * sizeof(*url->dvec); url->dvec = (char **)malloc(size); if (NULL == url->dvec) @@ -853,11 +993,17 @@ void free_url_spec(struct url_spec *url) freez(url->dbuffer); freez(url->dvec); freez(url->path); + freez(url->port_list); if (url->preg) { regfree(url->preg); freez(url->preg); } + if (url->tag_regex) + { + regfree(url->tag_regex); + freez(url->tag_regex); + } } @@ -871,17 +1017,105 @@ void free_url_spec(struct url_spec *url) * 1 : pattern = a URL pattern * 2 : url = URL to match * - * Returns : 0 iff the URL matches the pattern, else nonzero. + * Returns : Nonzero if the URL matches the pattern, else 0. * *********************************************************************/ int url_match(const struct url_spec *pattern, const struct http_request *url) { - return ((pattern->port == 0) || (pattern->port == url->port)) - && ((pattern->dbuffer == NULL) || (domain_match(pattern, url) == 0)) - && ((pattern->path == NULL) || - (regexec(pattern->preg, url->path, 0, NULL, 0) == 0) - ); + /* XXX: these should probably be functions. */ +#define PORT_MATCHES ((NULL == pattern->port_list) || match_portlist(pattern->port_list, url->port)) +#define DOMAIN_MATCHES ((NULL == pattern->dbuffer) || (0 == domain_match(pattern, url))) +#define PATH_MATCHES ((NULL == pattern->path) || (0 == regexec(pattern->preg, url->path, 0, NULL, 0))) + + if (pattern->tag_regex != NULL) + { + /* It's a tag pattern and shouldn't be matched against URLs */ + return 0; + } + + return (PORT_MATCHES && DOMAIN_MATCHES && PATH_MATCHES); + +} + + +/********************************************************************* + * + * Function : match_portlist + * + * Description : Check if a given number is covered by a comma + * separated list of numbers and ranges (a,b-c,d,..) + * + * Parameters : + * 1 : portlist = String with list + * 2 : port = port to check + * + * Returns : 0 => no match + * 1 => match + * + *********************************************************************/ +int match_portlist(const char *portlist, int port) +{ + char *min, *max, *next, *portlist_copy; + + min = next = portlist_copy = strdup(portlist); + + /* + * Zero-terminate first item and remember offset for next + */ + if (NULL != (next = strchr(portlist_copy, (int) ','))) + { + *next++ = '\0'; + } + + /* + * Loop through all items, checking for match + */ + while(min) + { + if (NULL == (max = strchr(min, (int) '-'))) + { + /* + * No dash, check for equality + */ + if (port == atoi(min)) + { + free(portlist_copy); + return(1); + } + } + else + { + /* + * This is a range, so check if between min and max, + * or, if max was omitted, between min and 65K + */ + *max++ = '\0'; + if(port >= atoi(min) && port <= (atoi(max) ? atoi(max) : 65535)) + { + free(portlist_copy); + return(1); + } + + } + + /* + * Jump to next item + */ + min = next; + + /* + * Zero-terminate next item and remember offset for n+1 + */ + if ((NULL != next) && (NULL != (next = strchr(next, (int) ',')))) + { + *next++ = '\0'; + } + } + + free(portlist_copy); + return 0; + }