-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2005-2008 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
- * InspIRCd: (C) 2002-2010 InspIRCd Development Team
- * See: http://wiki.inspircd.org/Credits
+ * This file is part of InspIRCd. InspIRCd 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, version 2.
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * 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.
*
- * ---------------------------------------------------
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+
/*
dns.h - dns library very very loosely based on
firedns, Copyright (C) 2002 Ian Gulliver
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-#ifndef _DNS_H
-#define _DNS_H
+#ifndef DNS_H
+#define DNS_H
#include "socket.h"
#include "hashcomp.h"
+/**
+ * Query and resource record types
+ */
+enum QueryType
+{
+ /** Uninitialized Query */
+ DNS_QUERY_NONE = 0,
+ /** 'A' record: an ipv4 address */
+ DNS_QUERY_A = 1,
+ /** 'CNAME' record: An alias */
+ DNS_QUERY_CNAME = 5,
+ /** 'PTR' record: a hostname */
+ DNS_QUERY_PTR = 12,
+ /** 'AAAA' record: an ipv6 address */
+ DNS_QUERY_AAAA = 28,
+
+ /** Force 'PTR' to use IPV4 scemantics */
+ DNS_QUERY_PTR4 = 0xFFFD,
+ /** Force 'PTR' to use IPV6 scemantics */
+ DNS_QUERY_PTR6 = 0xFFFE
+};
+
/**
* Result status, used internally
*/
/** The original request, a hostname or IP address
*/
std::string original;
+ /** The type of the request
+ */
+ QueryType type;
/** Build a DNS result.
* @param i The request ID
* @param res The request result, a hostname or IP
* @param timetolive The request time-to-live
* @param orig The original request, a hostname or IP
+ * @param qt The type of DNS query this result represents.
*/
- DNSResult(int i, const std::string &res, unsigned long timetolive, const std::string &orig) : id(i), result(res), ttl(timetolive), original(orig) { }
+ DNSResult(int i, const std::string &res, unsigned long timetolive, const std::string &orig, QueryType qt = DNS_QUERY_NONE) : id(i), result(res), ttl(timetolive), original(orig), type(qt) { }
};
/**
/** The cached result data, an IP or hostname
*/
std::string data;
+ /** The type of result this is
+ */
+ QueryType type;
/** The time when the item is due to expire
*/
time_t expires;
/** Build a cached query
* @param res The result data, an IP or hostname
+ * @param qt The type of DNS query this instance represents.
* @param ttl The time-to-live value of the query result
*/
- CachedQuery(const std::string &res, unsigned int ttl) : data(res)
- {
- expires = time(NULL) + ttl;
- }
+ CachedQuery(const std::string &res, QueryType qt, unsigned int ttl);
/** Returns the number of seconds remaining before this
* cache item has expired and should be removed.
*/
- int CalcTTLRemaining()
- {
- int n = (int)expires - (int)time(NULL);
- return (n < 0 ? 0 : n);
- }
+ int CalcTTLRemaining();
};
/** DNS cache information. Holds IPs mapped to hostnames, and hostnames mapped to IPs.
*/
-#if defined(WINDOWS) && !defined(HASHMAP_DEPRECATED)
-typedef nspace::hash_map<irc::string, CachedQuery, nspace::hash_compare<irc::string> > dnscache;
-#else
-typedef nspace::hash_map<irc::string, CachedQuery, nspace::hash<irc::string> > dnscache;
-#endif
+typedef nspace::hash_map<irc::string, CachedQuery, irc::hash> dnscache;
/**
* Error types that class Resolver can emit to its error method.
RESOLVER_FORCEUNLOAD = 5
};
-/**
- * Query and resource record types
- */
-enum QueryType
-{
- /** Uninitialized Query */
- DNS_QUERY_NONE = 0,
- /** 'A' record: an ipv4 address */
- DNS_QUERY_A = 1,
- /** 'CNAME' record: An alias */
- DNS_QUERY_CNAME = 5,
- /** 'PTR' record: a hostname */
- DNS_QUERY_PTR = 12,
- /** 'AAAA' record: an ipv6 address */
- DNS_QUERY_AAAA = 28,
-
- /** Force 'PTR' to use IPV4 scemantics */
- DNS_QUERY_PTR4 = 0xFFFD,
- /** Force 'PTR' to use IPV6 scemantics */
- DNS_QUERY_PTR6 = 0xFFFE
-};
-
/**
* Used internally to force PTR lookups to use a certain protocol scemantics,
* e.g. x.x.x.x.in-addr.arpa for v4, and *.ip6.arpa for v6.
*/
static const int MAX_REQUEST_ID = 0xFFFF;
- /**
- * A counter used to form part of the pseudo-random id
+ /** Maximum number of entries in cache
*/
- int currid;
+ static const unsigned int MAX_CACHE_SIZE = 1000;
/**
* Currently cached items
*/
~DNS();
- /** Portable random number generator, generates
- * its random number from the ircd stats counters,
- * effective user id, time of day and the rollover
- * counter (currid)
- */
- unsigned long PRNG();
-
/**
* Turn an in6_addr into a .ip6.arpa domain
*/
projects / user / henk / code / inspircd.git / blobdiff