src/acl/DestinationIp.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  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  34  */
  35
  36 #include "squid.h"
  37 #include "acl/DestinationIp.h"
  38 #include "acl/FilledChecklist.h"
  39 #include "HttpRequest.h"
  40
  41 char const *
  42 ACLDestinationIP::typeString() const
  43 {
  44     return "dst";
  45 }
  46
  47 int
  48 ACLDestinationIP::match(ACLChecklist *cl)
  49 {
  50     ACLFilledChecklist *checklist = Filled(cl);
  51     const ipcache_addrs *ia = ipcache_gethostbyname(checklist->request->GetHost(), IP_LOOKUP_IF_MISS);
  52
  53     if (ia) {
  54         /* Entry in cache found */
  55
  56         for (int k = 0; k < (int) ia->count; k++) {
  57             if (ACLIP::match(ia->in_addrs[k]))
  58                 return 1;
  59         }
  60
  61         return 0;
  62     } else if (!checklist->request->flags.destinationIPLookedUp()) {
  63         /* No entry in cache, lookup not attempted */
  64         debugs(28, 3, "aclMatchAcl: Can't yet compare '" << name << "' ACL for '" << checklist->request->GetHost() << "'");
  65         checklist->changeState (DestinationIPLookup::Instance());
  66         return 0;
  67     } else {
  68         return 0;
  69     }
  70 }
  71
  72 DestinationIPLookup DestinationIPLookup::instance_;
  73
  74 DestinationIPLookup *
  75 DestinationIPLookup::Instance()
  76 {
  77     return &instance_;
  78 }
  79
  80 void
  81 DestinationIPLookup::checkForAsync(ACLChecklist *cl)const
  82 {
  83     ACLFilledChecklist *checklist = Filled(cl);
  84     checklist->asyncInProgress(true);
  85     ipcache_nbgethostbyname(checklist->request->GetHost(), LookupDone, checklist);
  86 }
  87
  88 void
  89 DestinationIPLookup::LookupDone(const ipcache_addrs *, const DnsLookupDetails &details, void *data)
  90 {
  91     ACLFilledChecklist *checklist = Filled((ACLChecklist*)data);
  92     assert (checklist->asyncState() == DestinationIPLookup::Instance());
  93     checklist->request->flags.destinationIPLookupCompleted();
  94     checklist->request->recordLookup(details);
  95     checklist->asyncInProgress(false);
  96     checklist->changeState (ACLChecklist::NullState::Instance());
  97     checklist->check();
  98 }
  99
 100
 101
 102 ACL *
 103 ACLDestinationIP::clone() const
 104 {
 105     return new ACLDestinationIP(*this);
 106 }