src/ACLDomainData.cc

   1 /*
   2  * $Id: ACLDomainData.cc,v 1.12 2006/04/23 11:10:31 robertc Exp $
   3  *
   4  * DEBUG: section 28    Access Control
   5  * AUTHOR: Duane Wessels
   6  *
   7  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   8  * ----------------------------------------------------------
   9  *
  10  *  Squid is the result of efforts by numerous individuals from
  11  *  the Internet community; see the CONTRIBUTORS file for full
  12  *  details.   Many organizations have provided support for Squid's
  13  *  development; see the SPONSORS file for full details.  Squid is
  14  *  Copyrighted (C) 2001 by the Regents of the University of
  15  *  California; see the COPYRIGHT file for full details.  Squid
  16  *  incorporates software developed and/or copyrighted by other
  17  *  sources; see the CREDITS file for full details.
  18  *
  19  *  This program is free software; you can redistribute it and/or modify
  20  *  it under the terms of the GNU General Public License as published by
  21  *  the Free Software Foundation; either version 2 of the License, or
  22  *  (at your option) any later version.
  23  *
  24  *  This program is distributed in the hope that it will be useful,
  25  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  *  GNU General Public License for more details.
  28  *
  29  *  You should have received a copy of the GNU General Public License
  30  *  along with this program; if not, write to the Free Software
  31  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  32  *
  33  *
  34  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  35  */
  36
  37 #include "squid.h"
  38 #include "ACLDomainData.h"
  39 #include "authenticate.h"
  40 #include "ACLChecklist.h"
  41 #include "wordlist.h"
  42
  43 template<class T>
  44 inline void
  45 xRefFree(T &thing)
  46 {
  47     xfree (thing);
  48 }
  49
  50 ACLDomainData::~ACLDomainData()
  51 {
  52     if (domains)
  53         domains->destroy(xRefFree);
  54 }
  55
  56 template<class T>
  57 inline int
  58 splaystrcasecmp (T&l, T&r)
  59 {
  60     return strcasecmp ((char *)l,(char *)r);
  61 }
  62
  63 template<class T>
  64 inline int
  65 splaystrcmp (T&l, T&r)
  66 {
  67     return strcmp ((char *)l,(char *)r);
  68 }
  69
  70 /* general compare functions, these are used for tree search algorithms
  71  * so they return <0, 0 or >0 */
  72
  73 /* compare a host and a domain */
  74
  75 static int
  76 aclHostDomainCompare( char *const &a, char * const &b)
  77 {
  78     const char *h = (const char *)a;
  79     const char *d = (const char *)b;
  80     return matchDomainName(h, d);
  81 }
  82
  83
  84 /* compare two domains */
  85
  86 template<class T>
  87 int
  88 aclDomainCompare(T const &a, T const &b)
  89 {
  90     char * const d1 = (char *const)b;
  91     char * const d2 = (char *const )a;
  92     int ret;
  93     ret = aclHostDomainCompare(d1, d2);
  94
  95     if (ret != 0) {
  96         char *const d3 = d2;
  97         char *const d4 = d1;
  98         ret = aclHostDomainCompare(d3, d4);
  99     }
 100
 101     /* FIXME this warning may display d1 and d2 when it should display d3 and d4 */
 102     if (ret == 0) {
 103         debug(28, 0) ("WARNING: '%s' is a subdomain of '%s'\n", d1, d2);
 104         debug(28, 0) ("WARNING: because of this '%s' is ignored to keep splay tree searching predictable\n", (char *) a);
 105         debug(28, 0) ("WARNING: You should probably remove '%s' from the ACL named '%s'\n", d1, AclMatchedName);
 106     }
 107
 108     return ret;
 109 }
 110
 111 bool
 112 ACLDomainData::match(char const *host)
 113 {
 114     if (host == NULL)
 115         return 0;
 116
 117     debug(28, 3) ("aclMatchDomainList: checking '%s'\n", host);
 118
 119     domains = domains->splay((char *)host, aclHostDomainCompare);
 120
 121     debug(28, 3) ("aclMatchDomainList: '%s' %s\n",
 122                   host, splayLastResult ? "NOT found" : "found");
 123
 124     return !splayLastResult;
 125 }
 126
 127 static void
 128 aclDumpDomainListWalkee(char * const & node_data, void *outlist)
 129 {
 130     /* outlist is really a wordlist ** */
 131     wordlistAdd((wordlist **)outlist, (char const *)node_data);
 132 }
 133
 134 wordlist *
 135 ACLDomainData::dump()
 136 {
 137     wordlist *wl = NULL;
 138     /* damn this is VERY inefficient for long ACL lists... filling
 139      * a wordlist this way costs Sum(1,N) iterations. For instance
 140      * a 1000-elements list will be filled in 499500 iterations.
 141      */
 142     domains->walk(aclDumpDomainListWalkee, &wl);
 143     return wl;
 144 }
 145
 146 void
 147 ACLDomainData::parse()
 148 {
 149     char *t = NULL;
 150
 151     while ((t = strtokFile())) {
 152         Tolower(t);
 153         domains = domains->insert(xstrdup(t), aclDomainCompare);
 154     }
 155 }
 156
 157 bool
 158 ACLDomainData::empty() const
 159 {
 160     return domains->empty();
 161 }
 162
 163
 164 ACLData<char const *> *
 165 ACLDomainData::clone() const
 166 {
 167     /* Splay trees don't clone yet. */
 168     assert (!domains);
 169     return new ACLDomainData;
 170 }