+++ /dev/null
-const char urlmatch_rcs[] = "$Id: urlmatch.c,v 2.1 2002/06/06 19:03:29 jongfoster Exp $";
-/*********************************************************************
- *
- * File : $Source: /cvsroot/ijbswa//current/src/urlmatch.c,v $
- *
- * Purpose : Declares functions to match URLs against URL
- * patterns.
- *
- * Copyright : Written by and Copyright (C) 2001 the SourceForge
- * Privoxy team. http://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.
- *
- * Revisions :
- * $Log: urlmatch.c,v $
- * Revision 2.1 2002/06/06 19:03:29 jongfoster
- * Adding support for proprietary Microsoft WebDAV extensions
- *
- * Revision 2.0 2002/06/04 14:34:21 jongfoster
- * Moving source files to src/
- *
- * Revision 1.10 2002/05/12 21:40:37 jongfoster
- * - Removing some unused code
- *
- * Revision 1.9 2002/04/04 00:36:36 gliptak
- * always use pcre for matching
- *
- * Revision 1.8 2002/04/03 23:32:47 jongfoster
- * Fixing memory leak on error
- *
- * Revision 1.7 2002/03/26 22:29:55 swa
- * we have a new homepage!
- *
- * Revision 1.6 2002/03/24 13:25:43 swa
- * name change related issues
- *
- * Revision 1.5 2002/03/13 00:27:05 jongfoster
- * Killing warnings
- *
- * Revision 1.4 2002/03/07 03:46:17 oes
- * Fixed compiler warnings
- *
- * Revision 1.3 2002/03/03 14:51:11 oes
- * Fixed CLF logging: Added ocmd member for client's request to struct http_request
- *
- * Revision 1.2 2002/01/21 00:14:09 jongfoster
- * Correcting comment style
- * Fixing an uninitialized memory bug in create_url_spec()
- *
- * Revision 1.1 2002/01/17 20:53:46 jongfoster
- * Moving all our URL and URL pattern parsing code to the same file - it
- * was scattered around in filters.c, loaders.c and parsers.c.
- *
- * Providing a single, simple url_match(pattern,url) function - rather than
- * the 3-line match routine which was repeated all over the place.
- *
- * Renaming free_url to free_url_spec, since it frees a struct url_spec.
- *
- * Providing parse_http_url() so that URLs can be parsed without faking a
- * HTTP request line for parse_http_request() or repeating the parsing
- * code (both of which were techniques that were actually in use).
- *
- * Standardizing that struct http_request is used to represent a URL, and
- * struct url_spec is used to represent a URL pattern. (Before, URLs were
- * represented as seperate variables and a partially-filled-in url_spec).
- *
- *
- *********************************************************************/
-\f
-
-#include "config.h"
-
-#ifndef _WIN32
-#include <stdio.h>
-#include <sys/types.h>
-#endif
-
-#include <stdlib.h>
-#include <ctype.h>
-#include <assert.h>
-#include <string.h>
-
-#if !defined(_WIN32) && !defined(__OS2__)
-#include <unistd.h>
-#endif
-
-#include "project.h"
-#include "urlmatch.h"
-#include "ssplit.h"
-#include "miscutil.h"
-#include "errlog.h"
-
-const char urlmatch_h_rcs[] = URLMATCH_H_VERSION;
-
-
-/*********************************************************************
- *
- * Function : free_http_request
- *
- * Description : Freez a http_request structure
- *
- * Parameters :
- * 1 : http = points to a http_request structure to free
- *
- * Returns : N/A
- *
- *********************************************************************/
-void free_http_request(struct http_request *http)
-{
- assert(http);
-
- freez(http->cmd);
- freez(http->ocmd);
- freez(http->gpc);
- freez(http->host);
- freez(http->url);
- freez(http->hostport);
- freez(http->path);
- freez(http->ver);
- freez(http->host_ip_addr_str);
- freez(http->dbuffer);
- freez(http->dvec);
- http->dcount = 0;
-}
-
-
-/*********************************************************************
- *
- * Function : parse_http_url
- *
- * Description : Parse out the host and port from the URL. Find the
- * hostname & path, port (if ':'), and/or password (if '@')
- *
- * Parameters :
- * 1 : url = URL (or is it URI?) to break down
- * 2 : http = pointer to the http structure to hold elements.
- * Will be zeroed before use. Note that this
- * function sets the http->gpc and http->ver
- * members to NULL.
- * 3 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success
- * JB_ERR_MEMORY on out of memory
- * JB_ERR_CGI_PARAMS on malformed command/URL
- * or >100 domains deep.
- *
- *********************************************************************/
-jb_err parse_http_url(const char * url,
- struct http_request *http,
- struct client_state *csp)
-{
- /*
- * Zero out the results structure
- */
- memset(http, '\0', sizeof(*http));
-
-
- /*
- * Save our initial URL
- */
- http->url = strdup(url);
- if (http->url == NULL)
- {
- return JB_ERR_MEMORY;
- }
-
-
- /*
- * Split URL into protocol,hostport,path.
- */
- {
- char *buf;
- char *url_noproto;
- char *url_path;
-
- buf = strdup(url);
- if (buf == NULL)
- {
- return JB_ERR_MEMORY;
- }
-
- /* Find the start of the URL in our scratch space */
- url_noproto = buf;
- if (strncmpic(url_noproto, "http://", 7) == 0)
- {
- url_noproto += 7;
- http->ssl = 0;
- }
- else if (strncmpic(url_noproto, "https://", 8) == 0)
- {
- url_noproto += 8;
- http->ssl = 1;
- }
- else
- {
- http->ssl = 0;
- }
-
- url_path = strchr(url_noproto, '/');
- if (url_path != NULL)
- {
- /*
- * Got a path.
- *
- * NOTE: The following line ignores the path for HTTPS URLS.
- * This means that you get consistent behaviour if you type a
- * https URL in and it's parsed by the function. (When the
- * URL is actually retrieved, SSL hides the path part).
- */
- http->path = strdup(http->ssl ? "/" : url_path);
- *url_path = '\0';
- http->hostport = strdup(url_noproto);
- }
- else
- {
- /*
- * Repair broken HTTP requests that don't contain a path,
- * or CONNECT requests
- */
- http->path = strdup("/");
- http->hostport = strdup(url_noproto);
- }
-
- free(buf);
-
- if ( (http->path == NULL)
- || (http->hostport == NULL))
- {
- free(buf);
- free_http_request(http);
- return JB_ERR_MEMORY;
- }
- }
-
-
- /*
- * Split hostport into user/password (ignored), host, port.
- */
- {
- char *buf;
- char *host;
- char *port;
-
- buf = strdup(http->hostport);
- if (buf == NULL)
- {
- free_http_request(http);
- return JB_ERR_MEMORY;
- }
-
- /* check if url contains username and/or password */
- host = strchr(buf, '@');
- if (host != NULL)
- {
- /* Contains username/password, skip it and the @ sign. */
- host++;
- }
- else
- {
- /* No username or password. */
- host = buf;
- }
-
- /* check if url contains port */
- port = strchr(host, ':');
- if (port != NULL)
- {
- /* Contains port */
- /* Terminate hostname and point to start of port string */
- *port++ = '\0';
- http->port = atoi(port);
- }
- else
- {
- /* No port specified. */
- http->port = (http->ssl ? 143 : 80);
- }
-
- http->host = strdup(host);
-
- free(buf);
-
- if (http->host == NULL)
- {
- free_http_request(http);
- return JB_ERR_MEMORY;
- }
- }
-
-
- /*
- * Split domain name so we can compare it against wildcards
- */
- {
- char *vec[BUFFER_SIZE];
- size_t size;
- char *p;
-
- http->dbuffer = strdup(http->host);
- if (NULL == http->dbuffer)
- {
- free_http_request(http);
- 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
- */
- free_http_request(http);
- return JB_ERR_PARSE;
- }
-
- /* save a copy of the pointers in dvec */
- size = http->dcount * sizeof(*http->dvec);
-
- http->dvec = (char **)malloc(size);
- if (NULL == http->dvec)
- {
- free_http_request(http);
- return JB_ERR_MEMORY;
- }
-
- memcpy(http->dvec, vec, size);
- }
-
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : parse_http_request
- *
- * Description : Parse out the host and port from the URL. Find the
- * hostname & path, port (if ':'), and/or password (if '@')
- *
- * Parameters :
- * 1 : req = HTTP request line to break down
- * 2 : http = pointer to the http structure to hold elements
- * 3 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success
- * JB_ERR_MEMORY on out of memory
- * JB_ERR_CGI_PARAMS on malformed command/URL
- * or >100 domains deep.
- *
- *********************************************************************/
-jb_err parse_http_request(const char *req,
- struct http_request *http,
- struct client_state *csp)
-{
- char *buf;
- char *v[10];
- int n;
- jb_err err;
- int is_connect = 0;
-
- memset(http, '\0', sizeof(*http));
-
- buf = strdup(req);
- if (buf == NULL)
- {
- return JB_ERR_MEMORY;
- }
-
- n = ssplit(buf, " \r\n", v, SZ(v), 1, 1);
- if (n != 3)
- {
- free(buf);
- 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"))
-
- /* 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
- {
- /* Unknown HTTP method */
- /* Maybe one of: trace options purge */
- free(buf);
- return JB_ERR_PARSE;
- }
-
- err = parse_http_url(v[1], http, csp);
- if (err)
- {
- free(buf);
- return err;
- }
-
- /*
- * Copy the details into the structure
- */
- http->ssl = is_connect;
- http->cmd = strdup(req);
- http->gpc = strdup(v[0]);
- http->ver = strdup(v[2]);
-
- if ( (http->cmd == NULL)
- || (http->gpc == NULL)
- || (http->ver == NULL) )
- {
- free(buf);
- free_http_request(http);
- return JB_ERR_MEMORY;
- }
-
- free(buf);
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : simple_domaincmp
- *
- * Description : Domain-wise Compare fqdn's. The comparison is
- * both left- and right-anchored. The individual
- * domain names are compared with simplematch().
- * This is only used by domain_match.
- *
- * Parameters :
- * 1 : pv = array of patterns to compare
- * 2 : fv = array of domain components to compare
- * 3 : len = length of the arrays (both arrays are the
- * same length - if they weren't, it couldn't
- * possibly be a match).
- *
- * Returns : 0 => domains are equivalent, else no match.
- *
- *********************************************************************/
-static int simple_domaincmp(char **pv, char **fv, int len)
-{
- int n;
-
- for (n = 0; n < len; n++)
- {
- if (simplematch(pv[n], fv[n]))
- {
- return 1;
- }
- }
-
- return 0;
-
-}
-
-
-/*********************************************************************
- *
- * Function : domain_match
- *
- * Description : Domain-wise Compare fqdn's. Governed by the bimap in
- * pattern->unachored, the comparison is un-, left-,
- * right-anchored, or both.
- * The individual domain names are compared with
- * simplematch().
- *
- * Parameters :
- * 1 : pattern = a domain that may contain a '*' as a wildcard.
- * 2 : fqdn = domain name against which the patterns are compared.
- *
- * Returns : 0 => domains are equivalent, else no match.
- *
- *********************************************************************/
-static int domain_match(const struct url_spec *pattern, const struct http_request *fqdn)
-{
- char **pv, **fv; /* vectors */
- int plen, flen;
- int unanchored = pattern->unanchored & (ANCHOR_RIGHT | ANCHOR_LEFT);
-
- plen = pattern->dcount;
- flen = fqdn->dcount;
-
- if (flen < plen)
- {
- /* fqdn is too short to match this pattern */
- return 1;
- }
-
- pv = pattern->dvec;
- fv = fqdn->dvec;
-
- if (unanchored == ANCHOR_LEFT)
- {
- /*
- * Right anchored.
- *
- * Convert this into a fully anchored pattern with
- * the fqdn and pattern the same length
- */
- fv += (flen - plen); /* flen - plen >= 0 due to check above */
- return simple_domaincmp(pv, fv, plen);
- }
- else if (unanchored == 0)
- {
- /* Fully anchored, check length */
- if (flen != plen)
- {
- return 1;
- }
- return simple_domaincmp(pv, fv, plen);
- }
- else if (unanchored == ANCHOR_RIGHT)
- {
- /* Left anchored, ignore all extra in fqdn */
- return simple_domaincmp(pv, fv, plen);
- }
- else
- {
- /* Unanchored */
- int n;
- int maxn = flen - plen;
- for (n = 0; n <= maxn; n++)
- {
- if (!simple_domaincmp(pv, fv, plen))
- {
- return 0;
- }
- /*
- * Doesn't match from start of fqdn
- * Try skipping first part of fqdn
- */
- fv++;
- }
- return 1;
- }
-
-}
-
-
-/*********************************************************************
- *
- * Function : create_url_spec
- *
- * Description : Creates a "url_spec" structure from a string.
- * When finished, free with unload_url().
- *
- * Parameters :
- * 1 : url = Target url_spec to be filled in. Will be
- * zeroed before use.
- * 2 : buf = Source pattern, null terminated. NOTE: The
- * contents of this buffer are destroyed by this
- * function. If this function succeeds, the
- * buffer is copied to url->spec. If this
- * function fails, the contents of the buffer
- * are lost forever.
- *
- * Returns : JB_ERR_OK - Success
- * JB_ERR_MEMORY - Out of memory
- * JB_ERR_PARSE - Cannot parse regex (Detailed message
- * written to system log)
- *
- *********************************************************************/
-jb_err create_url_spec(struct url_spec * url, const char * buf)
-{
- char *p;
-
- assert(url);
- assert(buf);
-
- /* Zero memory */
- memset(url, '\0', sizeof(*url));
-
- /* save a copy of the orignal specification */
- if ((url->spec = strdup(buf)) == NULL)
- {
- return JB_ERR_MEMORY;
- }
-
- if ((p = strchr(buf, '/')) != NULL)
- {
- if (NULL == (url->path = strdup(p)))
- {
- freez(url->spec);
- return JB_ERR_MEMORY;
- }
- url->pathlen = strlen(url->path);
- *p = '\0';
- }
- else
- {
- url->path = NULL;
- url->pathlen = 0;
- }
- if (url->path)
- {
- int errcode;
- char rebuf[BUFFER_SIZE];
-
- if (NULL == (url->preg = zalloc(sizeof(*url->preg))))
- {
- freez(url->spec);
- freez(url->path);
- return JB_ERR_MEMORY;
- }
-
- sprintf(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));
-
- if (errlen > (sizeof(rebuf) - (size_t)1))
- {
- errlen = sizeof(rebuf) - (size_t)1;
- }
- rebuf[errlen] = '\0';
-
- log_error(LOG_LEVEL_ERROR, "error compiling %s: %s",
- url->spec, rebuf);
-
- freez(url->spec);
- freez(url->path);
- regfree(url->preg);
- freez(url->preg);
-
- return JB_ERR_PARSE;
- }
- }
- if ((p = strchr(buf, ':')) == NULL)
- {
- url->port = 0;
- }
- else
- {
- *p++ = '\0';
- url->port = atoi(p);
- }
-
- if (buf[0] != '\0')
- {
- char *v[150];
- size_t size;
-
- /* Parse domain part */
- if (buf[strlen(buf) - 1] == '.')
- {
- url->unanchored |= ANCHOR_RIGHT;
- }
- if (buf[0] == '.')
- {
- url->unanchored |= ANCHOR_LEFT;
- }
-
- /* split domain into components */
-
- url->dbuffer = strdup(buf);
- if (NULL == url->dbuffer)
- {
- freez(url->spec);
- freez(url->path);
- regfree(url->preg);
- freez(url->preg);
- return JB_ERR_MEMORY;
- }
-
- /* map to lower case */
- for (p = url->dbuffer; *p ; p++)
- {
- *p = tolower((int)(unsigned char)*p);
- }
-
- /* split the domain name into components */
- url->dcount = ssplit(url->dbuffer, ".", v, SZ(v), 1, 1);
-
- if (url->dcount < 0)
- {
- freez(url->spec);
- freez(url->path);
- regfree(url->preg);
- freez(url->preg);
- freez(url->dbuffer);
- url->dcount = 0;
- return JB_ERR_MEMORY;
- }
- else if (url->dcount != 0)
- {
-
- /* save a copy of the pointers in dvec */
- size = url->dcount * sizeof(*url->dvec);
-
- url->dvec = (char **)malloc(size);
- if (NULL == url->dvec)
- {
- freez(url->spec);
- freez(url->path);
- regfree(url->preg);
- freez(url->preg);
- freez(url->dbuffer);
- url->dcount = 0;
- return JB_ERR_MEMORY;
- }
-
- memcpy(url->dvec, v, size);
- }
- }
-
- return JB_ERR_OK;
-
-}
-
-
-/*********************************************************************
- *
- * Function : free_url_spec
- *
- * Description : Called from the "unloaders". Freez the url
- * structure elements.
- *
- * Parameters :
- * 1 : url = pointer to a url_spec structure.
- *
- * Returns : N/A
- *
- *********************************************************************/
-void free_url_spec(struct url_spec *url)
-{
- if (url == NULL) return;
-
- freez(url->spec);
- freez(url->dbuffer);
- freez(url->dvec);
- freez(url->path);
- if (url->preg)
- {
- regfree(url->preg);
- freez(url->preg);
- }
-}
-
-
-/*********************************************************************
- *
- * Function : url_match
- *
- * Description : Compare a URL against a URL pattern.
- *
- * Parameters :
- * 1 : pattern = a URL pattern
- * 2 : url = URL to match
- *
- * Returns : 0 iff the URL matches the pattern, else nonzero.
- *
- *********************************************************************/
-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)
- );
-}
-
-
-/*
- Local Variables:
- tab-width: 3
- end:
-*/
projects / privoxy.git / blobdiff