-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
- *
- * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
- * E-mail:
- * <brain@chatspike.net>
- * <Craig@chatspike.net>
- *
- * Written by Craig Edwards, Craig McLure, and others.
- * This program is free but copyrighted software; see
- * the file COPYING for details.
- *
- * ---------------------------------------------------
- */
-
-/*
-dns.h - dns library very very loosely based on
-firedns, Copyright (C) 2002 Ian Gulliver
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of version 2 of the GNU General Public License as
-published by the Free Software Foundation.
-
-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, write to the Free Software
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#ifndef _DNS_H
-#define _DNS_H
-
-#include <string>
-#include "inspircd_config.h"
-#include "socket.h"
-#include "base.h"
-
-using namespace std;
-using irc::sockets::insp_aton;
-using irc::sockets::insp_ntoa;
-using irc::sockets::insp_sockaddr;
-using irc::sockets::insp_inaddr;
-
-class InspIRCd;
-
-/**
- * Result status, used internally
- */
-typedef std::pair<int,std::string> DNSResult;
-
-/**
- * Information on a completed lookup, used internally
- */
-typedef std::pair<unsigned char*, std::string> DNSInfo;
-
-/**
- * Error types that class Resolver can emit to its error method.
- */
-enum ResolverError
-{
- RESOLVER_NOERROR = 0,
- RESOLVER_NSDOWN = 1,
- RESOLVER_NXDOMAIN = 2,
- RESOLVER_NOTREADY = 3,
- RESOLVER_BADIP = 4
-};
-
-/**
- * A DNS request
- */
-class DNSRequest;
-
-/**
- * A DNS packet header
- */
-class DNSHeader;
-
-/**
- * A DNS Resource Record (rr)
- */
-class ResourceRecord;
-
-/**
- * A set of requests keyed by request id
- */
-typedef std::map<int,DNSRequest*> requestlist;
-
-/**
- * An iterator into a set of requests
- */
-typedef requestlist::iterator requestlist_iter;
-
-/**
- * Query and resource record types
- */
-enum QueryType
-{
- DNS_QUERY_A = 1, /* 'A' record: an ipv4 address */
- DNS_QUERY_CNAME = 5, /* 'CNAME' record: An alias */
- DNS_QUERY_PTR = 12, /* 'PTR' record: a hostname */
- DNS_QUERY_AAAA = 28, /* 'AAAA' record: an ipv6 address */
-
- DNS_QUERY_PTR4 = 0xFFFD, /* Force 'PTR' to use IPV4 scemantics */
- DNS_QUERY_PTR6 = 0xFFFE, /* Force 'PTR' to use IPV6 scemantics */
-};
-
-#ifdef IPV6
-const QueryType DNS_QUERY_FORWARD = DNS_QUERY_AAAA;
-const QueryType DNS_QUERY_REVERSE = DNS_QUERY_PTR;
-#else
-const QueryType DNS_QUERY_FORWARD = DNS_QUERY_A;
-const QueryType DNS_QUERY_REVERSE = DNS_QUERY_PTR;
-#endif
-
-/**
- * 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.
- */
-enum ForceProtocol
-{
- PROTOCOL_IPV4 = 0, /* Forced to use ipv4 */
- PROTOCOL_IPV6 = 1 /* Forced to use ipv6 */
-};
-
-/**
- * The Resolver class is a high-level abstraction for resolving DNS entries.
- * It can do forward and reverse IPv4 lookups, and where IPv6 is supported, will
- * also be able to do those, transparent of protocols. Module developers must
- * extend this class via inheritence, and then insert a pointer to their derived
- * class into the core using Server::AddResolver(). Once you have done this,
- * the class will be able to receive callbacks. There are two callbacks which
- * can occur by calling virtual methods, one is a success situation, and the other
- * an error situation.
- */
-class Resolver : public Extensible
-{
- protected:
- /**
- * Pointer to creator
- */
- InspIRCd* ServerInstance;
- /**
- * The input data, either a host or an IP address
- */
- std::string input;
- /**
- * True if a forward lookup is being performed, false if otherwise
- */
- QueryType querytype;
- /**
- * The DNS erver being used for lookups. If this is an empty string,
- * the value of ServerConfig::DNSServer is used instead.
- */
- std::string server;
- /**
- * The ID allocated to your lookup. This is a pseudo-random number
- * between 0 and 65535, a value of -1 indicating a failure.
- * The core uses this to route results to the correct objects.
- */
- int myid;
- public:
- /**
- * Initiate DNS lookup. Your class should not attempt to delete or free these
- * objects, as the core will do this for you. They must always be created upon
- * the heap using new, as you cannot be sure at what time they will be deleted.
- * Allocating them on the stack or attempting to delete them yourself could cause
- * the object to go 'out of scope' and cause a segfault in the core if the result
- * arrives at a later time.
- * @param source The IP or hostname to resolve
- * @param qt The query type to perform. If you just want to perform a forward
- * or reverse lookup, and you don't care wether you get ipv4 or ipv6, then use
- * the constants DNS_QUERY_FORWARD and DNS_QUERY_REVERSE, which automatically
- * select from 'A' record or 'AAAA' record lookups. However, if you want to resolve
- * a specific record type, resolution of 'A', 'AAAA', 'PTR' and 'CNAME' records
- * is supported. Use one of the QueryType enum values to initiate this type of
- * lookup. Resolution of 'AAAA' ipv6 records is always supported, regardless of
- * wether InspIRCd is built with ipv6 support.
- * If you attempt to resolve a 'PTR' record using DNS_QUERY_PTR, and InspIRCd is
- * built with ipv6 support, the 'PTR' record will be formatted to ipv6 specs,
- * e.g. x.x.x.x.x....ip6.arpa. otherwise it will be formatted to ipv4 specs,
- * e.g. x.x.x.x.in-addr.arpa. This translation is automatic.
- * To get around this automatic behaviour, you must use one of the values
- * DNS_QUERY_PTR4 or DNS_QUERY_PTR6 to force ipv4 or ipv6 behaviour on the lookup,
- * irrespective of what protocol InspIRCd has been built for.
- * @throw ModuleException This class may throw an instance of ModuleException, in the
- * event a lookup could not be allocated, or a similar hard error occurs such as
- * the network being down. This will also be thrown if an invalid IP address is
- * passed when resolving a 'PTR' record.
- */
- Resolver(InspIRCd* Instance, const std::string &source, QueryType qt);
- /**
- * The default destructor does nothing.
- */
- virtual ~Resolver();
- /**
- * When your lookup completes, this method will be called.
- * @param result The resulting DNS lookup, either an IP address or a hostname.
- */
- virtual void OnLookupComplete(const std::string &result) = 0;
- /**
- * If an error occurs (such as NXDOMAIN, no domain name found) then this method
- * will be called.
- * @param e A ResolverError enum containing the error type which has occured.
- * @param errormessage The error text of the error that occured.
- */
- virtual void OnError(ResolverError e, const std::string &errormessage);
- /**
- * Returns the id value of this class. This is primarily used by the core
- * to determine where in various tables to place a pointer to your class, but it
- * is safe to call and use this method.
- * As specified in RFC1035, each dns request has a 16 bit ID value, ranging
- * from 0 to 65535. If there is an issue and the core cannot send your request,
- * this method will return -1.
- */
- int GetId();
-};
-
-/** DNS is a singleton class used by the core to dispatch dns
- * requests to the dns server, and route incoming dns replies
- * back to Resolver objects, based upon the request ID. You
- * should never use this class yourself.
- */
-class DNS : public Extensible
-{
- private:
-
- InspIRCd* ServerInstance;
-
- /**
- * The maximum value of a dns request id,
- * 16 bits wide, 0xFFFF.
- */
- static const int MAX_REQUEST_ID = 0xFFFF;
-
- /**
- * Requests that are currently 'in flight'
- */
- requestlist requests;
-
- /**
- * Server address being used currently
- */
- insp_inaddr myserver;
-
- /**
- * File descriptor being used to perform queries
- */
- static int MasterSocket;
-
- /**
- * A counter used to form part of the pseudo-random id
- */
- int currid;
-
- /**
- * Currently active Resolver classes
- */
- Resolver* Classes[MAX_REQUEST_ID];
-
- /**
- * We have to turn off a few checks on received packets
- * when people are using 4in6 (e.g. ::ffff:xxxx). This is
- * a temporary kludge, Please let me know if you know how
- * to fix it.
- */
- bool ip6munge;
-
- /**
- * Build a dns packet payload
- */
- int MakePayload(const char* name, const QueryType rr, const unsigned short rr_class, unsigned char* payload);
-
- public:
- /**
- * The port number DNS requests are made on,
- * and replies have as a source-port number.
- */
- static const int QUERY_PORT = 53;
-
- /**
- * Fill an rr (resource record) with data from input
- */
- static void FillResourceRecord(ResourceRecord* rr, const unsigned char* input);
- /**
- * Fill a header with data from input limited by a length
- */
- static void FillHeader(DNSHeader *header, const unsigned char *input, const int length);
- /**
- * Empty out a header into a data stream ready for transmission "on the wire"
- */
- static void EmptyHeader(unsigned char *output, const DNSHeader *header, const int length);
- /**
- * Get the master socket fd, used internally
- */
- static int GetMasterSocket();
-
- /**
- * Start the lookup of an ipv4 from a hostname
- */
- int GetIP(const char* name);
-
- /**
- * Start the lookup of a hostname from an ip,
- * always using the protocol inspircd is built for,
- * e.g. use ipv6 reverse lookup when built for ipv6,
- * or ipv4 lookup when built for ipv4.
- */
- int GetName(const insp_inaddr* ip);
-
- /**
- * Start lookup of a hostname from an ip, but
- * force a specific protocol to be used for the lookup
- * for example to perform an ipv6 reverse lookup.
- */
- int GetNameForce(const char *ip, ForceProtocol fp);
-
- /**
- * Start lookup of an ipv6 from a hostname
- */
- int GetIP6(const char *name);
-
- /**
- * Start lookup of a CNAME from another hostname
- */
- int GetCName(const char* alias);
-
- /**
- * Fetch the result string (an ip or host)
- * and/or an error message to go with it.
- */
- DNSResult GetResult();
-
- /**
- * Handle a SocketEngine read event
- */
- void MarshallReads(int fd);
-
- /**
- * Add a Resolver* to the list of active classes
- */
- bool AddResolverClass(Resolver* r);
-
- /**
- * Add a query to the list to be sent
- */
- DNSRequest* AddQuery(DNSHeader *header, int &id);
-
- /**
- * The constructor initialises the dns socket,
- * and clears the request lists.
- */
- DNS(InspIRCd* Instance);
-
- /**
- * Destructor
- */
- ~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
- */
- static void MakeIP6Int(char* query, const in6_addr *ip);
-};
-
-#endif
-
+/* +------------------------------------+\r * | Inspire Internet Relay Chat Daemon |\r * +------------------------------------+\r *\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team\r * See: http://www.inspircd.org/wiki/index.php/Credits\r *\r * This program is free but copyrighted software; see\r * the file COPYING for details.\r *\r * ---------------------------------------------------\r */\r\r/*\rdns.h - dns library very very loosely based on\rfiredns, Copyright (C) 2002 Ian Gulliver\r\rThis program is free software; you can redistribute it and/or modify\rit under the terms of version 2 of the GNU General Public License as\rpublished by the Free Software Foundation.\r\rThis program is distributed in the hope that it will be useful,\rbut WITHOUT ANY WARRANTY; without even the implied warranty of\rMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\rGNU General Public License for more details.\r\rYou should have received a copy of the GNU General Public License\ralong with this program; if not, write to the Free Software\rFoundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r*/\r\r#ifndef _DNS_H\r#define _DNS_H\r\r#include <string>\r#include "inspircd_config.h"\r#include "base.h"\r#include "socketengine.h"\r#include "socket.h"\r#include "hash_map.h"\r#include "hashcomp.h"\r\rusing namespace std;\rusing irc::sockets::insp_aton;\rusing irc::sockets::insp_ntoa;\rusing irc::sockets::insp_sockaddr;\rusing irc::sockets::insp_inaddr;\r\rclass InspIRCd;\rclass Module;\r\r/**\r * Result status, used internally\r */\rclass CoreExport DNSResult : public classbase\r{\r public:\r /** Result ID\r */\r int id;\r /** Result body, a hostname or IP address\r */\r std::string result;\r /** Time-to-live value of the result\r */\r unsigned long ttl;\r /** The original request, a hostname or IP address\r */\r std::string original;\r\r /** Build a DNS result.\r * @param i The request ID\r * @param res The request result, a hostname or IP\r * @param timetolive The request time-to-live\r * @param orig The original request, a hostname or IP\r */\r DNSResult(int i, const std::string &res, unsigned long timetolive, const std::string &orig) : id(i), result(res), ttl(timetolive), original(orig) { }\r};\r\r/**\r * Information on a completed lookup, used internally\r */\rtypedef std::pair<unsigned char*, std::string> DNSInfo;\r\r/** Cached item stored in the query cache.\r */\rclass CoreExport CachedQuery\r{\r public:\r /** The cached result data, an IP or hostname\r */\r std::string data;\r /** The time when the item is due to expire\r */\r time_t expires;\r\r /** Build a cached query\r * @param res The result data, an IP or hostname\r * @param ttl The time-to-live value of the query result\r */\r CachedQuery(const std::string &res, unsigned int ttl) : data(res)\r {\r expires = time(NULL) + ttl;\r }\r\r /** Returns the number of seconds remaining before this\r * cache item has expired and should be removed.\r */\r int CalcTTLRemaining()\r {\r int n = (int)expires - (int)time(NULL);\r return (n < 0 ? 0 : n);\r }\r};\r\r/** DNS cache information. Holds IPs mapped to hostnames, and hostnames mapped to IPs.\r */\r#ifndef WIN32\rtypedef nspace::hash_map<irc::string, CachedQuery, nspace::hash<irc::string> > dnscache;\r#else\rtypedef nspace::hash_map<irc::string, CachedQuery, nspace::hash_compare<irc::string> > dnscache;\r#endif\r\r/**\r * Error types that class Resolver can emit to its error method.\r */\renum ResolverError\r{\r RESOLVER_NOERROR = 0,\r RESOLVER_NSDOWN = 1,\r RESOLVER_NXDOMAIN = 2,\r RESOLVER_NOTREADY = 3,\r RESOLVER_BADIP = 4,\r RESOLVER_TIMEOUT = 5,\r RESLOVER_FORCEUNLOAD = 6\r};\r\r/**\r * A DNS request\r */\rclass DNSRequest;\r\r/**\r * A DNS packet header\r */\rclass DNSHeader;\r\r/**\r * A DNS Resource Record (rr)\r */\rstruct ResourceRecord;\r\r/**\r * Query and resource record types\r */\renum QueryType\r{\r DNS_QUERY_NONE = 0, /* Uninitialized Query */\r DNS_QUERY_A = 1, /* 'A' record: an ipv4 address */\r DNS_QUERY_CNAME = 5, /* 'CNAME' record: An alias */\r DNS_QUERY_PTR = 12, /* 'PTR' record: a hostname */\r DNS_QUERY_AAAA = 28, /* 'AAAA' record: an ipv6 address */\r\r DNS_QUERY_PTR4 = 0xFFFD, /* Force 'PTR' to use IPV4 scemantics */\r DNS_QUERY_PTR6 = 0xFFFE /* Force 'PTR' to use IPV6 scemantics */\r};\r\r#ifdef IPV6\rconst QueryType DNS_QUERY_FORWARD = DNS_QUERY_AAAA;\r#else\rconst QueryType DNS_QUERY_FORWARD = DNS_QUERY_A;\r#endif\rconst QueryType DNS_QUERY_REVERSE = DNS_QUERY_PTR;\r/**\r * Used internally to force PTR lookups to use a certain protocol scemantics,\r * e.g. x.x.x.x.in-addr.arpa for v4, and *.ip6.arpa for v6.\r */\renum ForceProtocol\r{\r PROTOCOL_IPV4 = 0, /* Forced to use ipv4 */\r PROTOCOL_IPV6 = 1 /* Forced to use ipv6 */\r};\r\r/**\r * The Resolver class is a high-level abstraction for resolving DNS entries.\r * It can do forward and reverse IPv4 lookups, and where IPv6 is supported, will\r * also be able to do those, transparent of protocols. Module developers must\r * extend this class via inheritence, and then insert a pointer to their derived\r * class into the core using Server::AddResolver(). Once you have done this,\r * the class will be able to receive callbacks. There are two callbacks which\r * can occur by calling virtual methods, one is a success situation, and the other\r * an error situation.\r */\rclass CoreExport Resolver : public Extensible\r{\r protected:\r /**\r * Pointer to creator\r */\r InspIRCd* ServerInstance;\r /**\r * Pointer to creator module (if any, or NULL)\r */\r Module* Creator;\r /**\r * The input data, either a host or an IP address\r */\r std::string input;\r /**\r * True if a forward lookup is being performed, false if otherwise\r */\r QueryType querytype;\r /**\r * The DNS erver being used for lookups. If this is an empty string,\r * the value of ServerConfig::DNSServer is used instead.\r */\r std::string server;\r /**\r * The ID allocated to your lookup. This is a pseudo-random number\r * between 0 and 65535, a value of -1 indicating a failure.\r * The core uses this to route results to the correct objects.\r */\r int myid;\r\r /**\r * Cached result, if there is one\r */\r CachedQuery *CQ;\r\r /**\r * Time left before cache expiry\r */\r int time_left;\r public:\r /**\r * Initiate DNS lookup. Your class should not attempt to delete or free these\r * objects, as the core will do this for you. They must always be created upon\r * the heap using new, as you cannot be sure at what time they will be deleted.\r * Allocating them on the stack or attempting to delete them yourself could cause\r * the object to go 'out of scope' and cause a segfault in the core if the result\r * arrives at a later time.\r * @param source The IP or hostname to resolve\r * @param qt The query type to perform. If you just want to perform a forward\r * or reverse lookup, and you don't care wether you get ipv4 or ipv6, then use\r * the constants DNS_QUERY_FORWARD and DNS_QUERY_REVERSE, which automatically\r * select from 'A' record or 'AAAA' record lookups. However, if you want to resolve\r * a specific record type, resolution of 'A', 'AAAA', 'PTR' and 'CNAME' records\r * is supported. Use one of the QueryType enum values to initiate this type of\r * lookup. Resolution of 'AAAA' ipv6 records is always supported, regardless of\r * wether InspIRCd is built with ipv6 support.\r * If you attempt to resolve a 'PTR' record using DNS_QUERY_PTR, and InspIRCd is\r * built with ipv6 support, the 'PTR' record will be formatted to ipv6 specs,\r * e.g. x.x.x.x.x....ip6.arpa. otherwise it will be formatted to ipv4 specs,\r * e.g. x.x.x.x.in-addr.arpa. This translation is automatic.\r * To get around this automatic behaviour, you must use one of the values\r * DNS_QUERY_PTR4 or DNS_QUERY_PTR6 to force ipv4 or ipv6 behaviour on the lookup,\r * irrespective of what protocol InspIRCd has been built for.\r * @param cached The constructor will set this boolean to true or false depending\r * on whether the DNS lookup you are attempting is cached (and not expired) or not.\r * If the value is cached, upon return this will be set to true, otherwise it will\r * be set to false. You should pass this value to InspIRCd::AddResolver(), which\r * will then influence the behaviour of the method and determine whether a cached\r * or non-cached result is obtained. The value in this variable is always correct\r * for the given request when the constructor exits.\r * @param creator See the note below.\r * @throw ModuleException This class may throw an instance of ModuleException, in the\r * event a lookup could not be allocated, or a similar hard error occurs such as\r * the network being down. This will also be thrown if an invalid IP address is\r * passed when resolving a 'PTR' record.\r *\r * NOTE: If you are instantiating your DNS lookup from a module, you should set the\r * value of creator to point at your Module class. This way if your module is unloaded\r * whilst lookups are in progress, they can be safely removed and your module will not\r * crash the server.\r */\r Resolver(InspIRCd* Instance, const std::string &source, QueryType qt, bool &cached, Module* creator = NULL);\r\r /**\r * The default destructor does nothing.\r */\r virtual ~Resolver();\r /**\r * When your lookup completes, this method will be called.\r * @param result The resulting DNS lookup, either an IP address or a hostname.\r * @param ttl The time-to-live value of the result, in the instance of a cached\r * result, this is the number of seconds remaining before refresh/expiry.\r * @param cached True if the result is a cached result, false if it was requested\r * from the DNS server.\r */\r virtual void OnLookupComplete(const std::string &result, unsigned int ttl, bool cached) = 0;\r /**\r * If an error occurs (such as NXDOMAIN, no domain name found) then this method\r * will be called.\r * @param e A ResolverError enum containing the error type which has occured.\r * @param errormessage The error text of the error that occured.\r */\r virtual void OnError(ResolverError e, const std::string &errormessage);\r /**\r * Returns the id value of this class. This is primarily used by the core\r * to determine where in various tables to place a pointer to your class, but it\r * is safe to call and use this method.\r * As specified in RFC1035, each dns request has a 16 bit ID value, ranging\r * from 0 to 65535. If there is an issue and the core cannot send your request,\r * this method will return -1.\r */\r int GetId();\r /**\r * Returns the creator module, or NULL\r */\r Module* GetCreator();\r /**\r * If the result is a cached result, this triggers the objects\r * OnLookupComplete. This is done because it is not safe to call\r * the abstract virtual method from the constructor.\r */\r void TriggerCachedResult();\r};\r\r/** DNS is a singleton class used by the core to dispatch dns\r * requests to the dns server, and route incoming dns replies\r * back to Resolver objects, based upon the request ID. You\r * should never use this class yourself.\r */\rclass CoreExport DNS : public EventHandler\r{\r private:\r\r /**\r * Creator/Owner object\r */\r InspIRCd* ServerInstance;\r\r /**\r * The maximum value of a dns request id,\r * 16 bits wide, 0xFFFF.\r */\r static const int MAX_REQUEST_ID = 0xFFFF;\r\r /**\r * A counter used to form part of the pseudo-random id\r */\r int currid;\r\r /**\r * We have to turn off a few checks on received packets\r * when people are using 4in6 (e.g. ::ffff:xxxx). This is\r * a temporary kludge, Please let me know if you know how\r * to fix it.\r */\r bool ip6munge;\r\r /**\r * Currently cached items\r */\r dnscache* cache;\r\r /** A timer which ticks every hour to remove expired\r * items from the DNS cache.\r */\r class CacheTimer* PruneTimer;\r\r /**\r * Build a dns packet payload\r */\r int MakePayload(const char* name, const QueryType rr, const unsigned short rr_class, unsigned char* payload);\r\r public:\r\r /**\r * Server address being used currently\r */\r int socketfamily;\r#ifdef IPV6\r in6_addr myserver6;\r#endif\r in_addr myserver4;\r\r /**\r * Currently active Resolver classes\r */\r Resolver* Classes[MAX_REQUEST_ID];\r\r /**\r * Requests that are currently 'in flight'\r */\r DNSRequest* requests[MAX_REQUEST_ID];\r\r /**\r * The port number DNS requests are made on,\r * and replies have as a source-port number.\r */\r static const int QUERY_PORT = 53;\r\r /**\r * Fill an rr (resource record) with data from input\r */\r static void FillResourceRecord(ResourceRecord* rr, const unsigned char* input);\r\r /**\r * Fill a header with data from input limited by a length\r */\r static void FillHeader(DNSHeader *header, const unsigned char *input, const int length);\r\r /**\r * Empty out a header into a data stream ready for transmission "on the wire"\r */\r static void EmptyHeader(unsigned char *output, const DNSHeader *header, const int length);\r\r /**\r * Start the lookup of an ipv4 from a hostname\r */\r int GetIP(const char* name);\r\r /**\r * Start the lookup of a hostname from an ip,\r * always using the protocol inspircd is built for,\r * e.g. use ipv6 reverse lookup when built for ipv6,\r * or ipv4 lookup when built for ipv4.\r */\r int GetName(const insp_inaddr* ip);\r\r /**\r * Start lookup of a hostname from an ip, but\r * force a specific protocol to be used for the lookup\r * for example to perform an ipv6 reverse lookup.\r */\r int GetNameForce(const char *ip, ForceProtocol fp);\r\r /**\r * Start lookup of an ipv6 from a hostname\r */\r int GetIP6(const char *name);\r\r /**\r * Start lookup of a CNAME from another hostname\r */\r int GetCName(const char* alias);\r\r /**\r * Fetch the result string (an ip or host)\r * and/or an error message to go with it.\r */\r DNSResult GetResult();\r\r /**\r * Handle a SocketEngine read event\r * Inherited from EventHandler\r */\r void HandleEvent(EventType et, int errornum = 0);\r\r /**\r * Add a Resolver* to the list of active classes\r */\r bool AddResolverClass(Resolver* r);\r\r /**\r * Add a query to the list to be sent\r */\r DNSRequest* AddQuery(DNSHeader *header, int &id, const char* original);\r\r /**\r * The constructor initialises the dns socket,\r * and clears the request lists.\r */\r DNS(InspIRCd* Instance);\r\r /**\r * Re-initialize the DNS subsystem.\r */\r void Rehash();\r\r /**\r * Destructor\r */\r ~DNS();\r\r /** Portable random number generator, generates\r * its random number from the ircd stats counters,\r * effective user id, time of day and the rollover\r * counter (currid)\r */\r unsigned long PRNG();\r\r /**\r * Turn an in6_addr into a .ip6.arpa domain\r */\r static void MakeIP6Int(char* query, const in6_addr *ip);\r\r /**\r * Clean out all dns resolvers owned by a particular\r * module, to make unloading a module safe if there\r * are dns requests currently in progress.\r */\r void CleanResolvers(Module* module);\r\r /** Return the cached value of an IP or hostname\r * @param source An IP or hostname to find in the cache.\r * @return A pointer to a CachedQuery if the item exists,\r * otherwise NULL.\r */\r CachedQuery* GetCache(const std::string &source);\r\r /** Delete a cached item from the DNS cache.\r * @param source An IP or hostname to remove\r */\r void DelCache(const std::string &source);\r\r /** Clear all items from the DNS cache immediately.\r */\r int ClearCache();\r\r /** Prune the DNS cache, e.g. remove all expired\r * items and rehash the cache buckets, but leave\r * items in the hash which are still valid.\r */\r int PruneCache();\r};\r\r#endif\r\r
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projects / user / henk / code / inspircd.git / blobdiff