src/acl/Eui64.cc

   1 /*
   2  * DEBUG: section 28    Access Control
   3  * AUTHOR: Amos Jeffries
   4  *
   5  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   6  * ----------------------------------------------------------
   7  *
   8  *  Squid is the result of efforts by numerous individuals from
   9  *  the Internet community; see the CONTRIBUTORS file for full
  10  *  details.   Many organizations have provided support for Squid's
  11  *  development; see the SPONSORS file for full details.  Squid is
  12  *  Copyrighted (C) 2001 by the Regents of the University of
  13  *  California; see the COPYRIGHT file for full details.  Squid
  14  *  incorporates software developed and/or copyrighted by other
  15  *  sources; see the CREDITS file for full details.
  16  *
  17  *  This program is free software; you can redistribute it and/or modify
  18  *  it under the terms of the GNU General Public License as published by
  19  *  the Free Software Foundation; either version 2 of the License, or
  20  *  (at your option) any later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful,
  23  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *  GNU General Public License for more details.
  26  *
  27  *  You should have received a copy of the GNU General Public License
  28  *  along with this program; if not, write to the Free Software
  29  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  30  *
  31  *
  32  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  33  */
  34
  35 #include "squid.h"
  36
  37 #if USE_SQUID_EUI
  38
  39 #include "acl/Eui64.h"
  40 #include "acl/FilledChecklist.h"
  41 #include "Debug.h"
  42 #include "eui/Eui64.h"
  43 #include "ip/Address.h"
  44 #include "protos.h"
  45 #include "wordlist.h"
  46
  47 static void aclParseEuiList(SplayNode<Eui::Eui64 *> **curlist);
  48 static int aclMatchEui(SplayNode<Eui::Eui64 *> **dataptr, Ip::Address &c);
  49 static SplayNode<Eui::Eui64 *>::SPLAYCMP aclEui64Compare;
  50 static SplayNode<Eui::Eui64 *>::SPLAYWALKEE aclDumpEuiListWalkee;
  51
  52 ACL *
  53 ACLEui64::clone() const
  54 {
  55     return new ACLEui64(*this);
  56 }
  57
  58 ACLEui64::ACLEui64 (char const *theClass) : data (NULL), class_ (theClass)
  59 {}
  60
  61 ACLEui64::ACLEui64 (ACLEui64 const & old) : data (NULL), class_ (old.class_)
  62 {
  63     /* we don't have copy constructors for the data yet */
  64     assert (!old.data);
  65 }
  66
  67 ACLEui64::~ACLEui64()
  68 {
  69     if (data)
  70         data->destroy(SplayNode<Eui::Eui64*>::DefaultFree);
  71 }
  72
  73 char const *
  74 ACLEui64::typeString() const
  75 {
  76     return class_;
  77 }
  78
  79 bool
  80 ACLEui64::empty () const
  81 {
  82     return data->empty();
  83 }
  84
  85 Eui::Eui64 *
  86 aclParseEuiData(const char *t)
  87 {
  88     char buf[256];
  89     Eui::Eui64 *q = new Eui::Eui64;
  90     debugs(28, 5, "aclParseEuiData: " << t);
  91
  92     if (sscanf(t, "%[0-9a-fA-F:]", buf) != 1) {
  93         debugs(28, DBG_CRITICAL, "aclParseEuiData: Bad EUI-64 address: '" << t << "'");
  94         safe_free(q);
  95         return NULL;
  96     }
  97
  98     if (!q->decode(buf)) {
  99         debugs(28, DBG_CRITICAL, "" << cfg_filename << " line " << config_lineno << ": " << config_input_line);
 100         debugs(28, DBG_CRITICAL, "aclParseEuiData: Ignoring invalid EUI-64 acl entry: can't parse '" << buf << "'");
 101         safe_free(q);
 102         return NULL;
 103     }
 104
 105     return q;
 106 }
 107
 108 /*******************/
 109 /* aclParseEuiList */
 110 /*******************/
 111 void
 112 ACLEui64::parse()
 113 {
 114     aclParseEuiList(&data);
 115 }
 116
 117 void
 118 aclParseEuiList(SplayNode<Eui::Eui64 *> **curlist)
 119 {
 120     char *t = NULL;
 121     SplayNode<Eui::Eui64*> **Top = curlist;
 122     Eui::Eui64 *q = NULL;
 123
 124     while ((t = strtokFile())) {
 125         if ((q = aclParseEuiData(t)) == NULL)
 126             continue;
 127
 128         *Top = (*Top)->insert(q, aclEui64Compare);
 129     }
 130 }
 131
 132 int
 133 ACLEui64::match(ACLChecklist *cl)
 134 {
 135     ACLFilledChecklist *checklist = Filled(cl);
 136
 137     /* IPv4 does not do EUI-64 (yet) */
 138     if (!checklist->src_addr.IsIPv6()) {
 139         debugs(14, 3, "ACLEui64::match: IPv6 Required for EUI-64 Lookups. Skipping " << checklist->src_addr );
 140         return 0;
 141     }
 142
 143     return aclMatchEui(&data, checklist->src_addr);
 144 }
 145
 146 /***************/
 147 /* aclMatchEui */
 148 /***************/
 149 int
 150 aclMatchEui(SplayNode<Eui::Eui64 *> **dataptr, Ip::Address &c)
 151 {
 152     Eui::Eui64 result;
 153     SplayNode<Eui::Eui64 *> **Top = dataptr;
 154
 155     if (result.lookup(c)) {
 156         /* Do ACL match lookup */
 157         *Top = (*Top)->splay(&result, aclEui64Compare);
 158         debugs(28, 3, "aclMatchEui: '" << c << "' " << (splayLastResult ? "NOT found" : "found"));
 159         return (0 == splayLastResult);
 160     }
 161
 162     /*
 163      * Address was not found on any interface
 164      */
 165     debugs(28, 3, "aclMatchEui: " << c << " NOT found");
 166     return 0;
 167 }
 168
 169 static int
 170 aclEui64Compare(Eui::Eui64 * const &a, Eui::Eui64 * const &b)
 171 {
 172     return memcmp(a, b, sizeof(Eui::Eui64));
 173 }
 174
 175 static void
 176 aclDumpEuiListWalkee(Eui::Eui64 * const &node, void *state)
 177 {
 178     static char buf[48];
 179     node->encode(buf, 48);
 180     wordlistAdd((wordlist **)state, buf);
 181 }
 182
 183 wordlist *
 184 ACLEui64::dump() const
 185 {
 186     wordlist *w = NULL;
 187     data->walk(aclDumpEuiListWalkee, &w);
 188     return w;
 189 }
 190
 191 #endif /* USE_SQUID_EUI */