src/acl/DestinationDomain.cc

   1 /*
   2  * $Id$
   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 "acl/DestinationDomain.h"
  39 #include "acl/Checklist.h"
  40 #include "acl/RegexData.h"
  41 #include "acl/DomainData.h"
  42 #include "fqdncache.h"
  43 #include "HttpRequest.h"
  44 #include "ipcache.h"
  45 #include "protos.h"
  46
  47 DestinationDomainLookup DestinationDomainLookup::instance_;
  48
  49 DestinationDomainLookup *
  50 DestinationDomainLookup::Instance()
  51 {
  52     return &instance_;
  53 }
  54
  55 void
  56 DestinationDomainLookup::checkForAsync(ACLChecklist *cl) const
  57 {
  58     ACLFilledChecklist *checklist = Filled(cl);
  59     checklist->asyncInProgress(true);
  60     fqdncache_nbgethostbyaddr(checklist->dst_addr, LookupDone, checklist);
  61 }
  62
  63 void
  64 DestinationDomainLookup::LookupDone(const char *fqdn, const DnsLookupDetails &details, void *data)
  65 {
  66     ACLFilledChecklist *checklist = Filled((ACLChecklist*)data);
  67     assert (checklist->asyncState() == DestinationDomainLookup::Instance());
  68
  69     checklist->asyncInProgress(false);
  70     checklist->changeState (ACLChecklist::NullState::Instance());
  71     checklist->markDestinationDomainChecked();
  72     checklist->request->recordLookup(details);
  73     checklist->matchNonBlocking();
  74 }
  75
  76
  77 int
  78 ACLDestinationDomainStrategy::match (ACLData<MatchType> * &data, ACLFilledChecklist *checklist)
  79 {
  80     assert(checklist != NULL && checklist->request != NULL);
  81
  82     if (data->match(checklist->request->GetHost())) {
  83         return 1;
  84     }
  85
  86     /* numeric IPA? no, trust the above result. */
  87     if (checklist->request->GetHostIsNumeric() == 0) {
  88         return 0;
  89     }
  90
  91     /* do we already have the rDNS? match on it if we do. */
  92     if (checklist->dst_rdns) {
  93         debugs(28, 3, "aclMatchAcl: '" << AclMatchedName << "' match with stored rDNS '" << checklist->dst_rdns << "' for '" << checklist->request->GetHost() << "'");
  94         return data->match(checklist->dst_rdns);
  95     }
  96
  97     /* raw IP without rDNS? look it up and wait for the result */
  98     const ipcache_addrs *ia = ipcacheCheckNumeric(checklist->request->GetHost());
  99     if (!ia) {
 100         /* not a valid IPA */
 101         checklist->dst_rdns = xstrdup("invalid");
 102         return 0;
 103     }
 104
 105     checklist->dst_addr = ia->in_addrs[0];
 106     const char *fqdn = fqdncache_gethostbyaddr(checklist->dst_addr, FQDN_LOOKUP_IF_MISS);
 107
 108     if (fqdn) {
 109         checklist->dst_rdns = xstrdup(fqdn);
 110         return data->match(fqdn);
 111     } else if (!checklist->destinationDomainChecked()) {
 112         /* FIXME: Using AclMatchedName here is not OO correct. Should find a way to the current acl */
 113         debugs(28, 3, "aclMatchAcl: Can't yet compare '" << AclMatchedName << "' ACL for '" << checklist->request->GetHost() << "'");
 114         checklist->changeState(DestinationDomainLookup::Instance());
 115         return 0;
 116     }
 117
 118     return data->match("none");
 119 }
 120
 121 ACLDestinationDomainStrategy *
 122 ACLDestinationDomainStrategy::Instance()
 123 {
 124     return &Instance_;
 125 }
 126
 127 ACLDestinationDomainStrategy ACLDestinationDomainStrategy::Instance_;