00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
183 lines
5.3 KiB
C
183 lines
5.3 KiB
C
/* $NetBSD: interfacemgr.h,v 1.6 2014/12/10 04:37:52 christos Exp $ */
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/*
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* Copyright (C) 2004, 2005, 2007, 2011, 2013, 2014 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2002 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* Id: interfacemgr.h,v 1.35 2011/07/28 23:47:58 tbox Exp */
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#ifndef NAMED_INTERFACEMGR_H
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#define NAMED_INTERFACEMGR_H 1
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/*****
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***** Module Info
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*****/
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/*! \file
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* \brief
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* The interface manager monitors the operating system's list
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* of network interfaces, creating and destroying listeners
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* as needed.
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*
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* Reliability:
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*\li No impact expected.
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*
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* Resources:
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*
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* Security:
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* \li The server will only be able to bind to the DNS port on
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* newly discovered interfaces if it is running as root.
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*
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* Standards:
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*\li The API for scanning varies greatly among operating systems.
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* This module attempts to hide the differences.
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*/
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/***
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*** Imports
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***/
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#include <isc/magic.h>
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#include <isc/mem.h>
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#include <isc/socket.h>
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#include <dns/result.h>
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#include <named/listenlist.h>
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#include <named/types.h>
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/***
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*** Types
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***/
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#define IFACE_MAGIC ISC_MAGIC('I',':','-',')')
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#define NS_INTERFACE_VALID(t) ISC_MAGIC_VALID(t, IFACE_MAGIC)
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#define NS_INTERFACEFLAG_ANYADDR 0x01U /*%< bound to "any" address */
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#define MAX_UDP_DISPATCH 128 /*%< Maximum number of UDP dispatchers
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to start per interface */
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/*% The nameserver interface structure */
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struct ns_interface {
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unsigned int magic; /*%< Magic number. */
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ns_interfacemgr_t * mgr; /*%< Interface manager. */
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isc_mutex_t lock;
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int references; /*%< Locked */
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unsigned int generation; /*%< Generation number. */
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isc_sockaddr_t addr; /*%< Address and port. */
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unsigned int flags; /*%< Interface characteristics */
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char name[32]; /*%< Null terminated. */
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dns_dispatch_t * udpdispatch[MAX_UDP_DISPATCH];
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/*%< UDP dispatchers. */
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isc_socket_t * tcpsocket; /*%< TCP socket. */
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isc_dscp_t dscp; /*%< "listen-on" DSCP value */
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int ntcptarget; /*%< Desired number of concurrent
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TCP accepts */
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int ntcpcurrent; /*%< Current ditto, locked */
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int nudpdispatch; /*%< Number of UDP dispatches */
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ns_clientmgr_t * clientmgr; /*%< Client manager. */
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ISC_LINK(ns_interface_t) link;
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};
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/***
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*** Functions
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***/
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isc_result_t
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ns_interfacemgr_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
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isc_socketmgr_t *socketmgr,
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dns_dispatchmgr_t *dispatchmgr,
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isc_task_t *task, ns_interfacemgr_t **mgrp);
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/*%
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* Create a new interface manager.
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*
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* Initially, the new manager will not listen on any interfaces.
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* Call ns_interfacemgr_setlistenon() and/or ns_interfacemgr_setlistenon6()
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* to set nonempty listen-on lists.
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*/
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void
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ns_interfacemgr_attach(ns_interfacemgr_t *source, ns_interfacemgr_t **target);
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void
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ns_interfacemgr_detach(ns_interfacemgr_t **targetp);
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void
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ns_interfacemgr_shutdown(ns_interfacemgr_t *mgr);
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void
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ns_interfacemgr_scan(ns_interfacemgr_t *mgr, isc_boolean_t verbose);
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/*%
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* Scan the operatings system's list of network interfaces
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* and create listeners when new interfaces are discovered.
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* Shut down the sockets for interfaces that go away.
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*
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* This should be called once on server startup and then
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* periodically according to the 'interface-interval' option
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* in named.conf.
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*/
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void
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ns_interfacemgr_adjust(ns_interfacemgr_t *mgr, ns_listenlist_t *list,
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isc_boolean_t verbose);
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/*%
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* Similar to ns_interfacemgr_scan(), but this function also tries to see the
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* need for an explicit listen-on when a list element in 'list' is going to
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* override an already-listening a wildcard interface.
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*
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* This function does not update localhost and localnets ACLs.
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*
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* This should be called once on server startup, after configuring views and
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* zones.
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*/
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void
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ns_interfacemgr_setlistenon4(ns_interfacemgr_t *mgr, ns_listenlist_t *value);
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/*%
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* Set the IPv4 "listen-on" list of 'mgr' to 'value'.
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* The previous IPv4 listen-on list is freed.
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*/
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void
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ns_interfacemgr_setlistenon6(ns_interfacemgr_t *mgr, ns_listenlist_t *value);
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/*%
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* Set the IPv6 "listen-on" list of 'mgr' to 'value'.
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* The previous IPv6 listen-on list is freed.
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*/
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dns_aclenv_t *
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ns_interfacemgr_getaclenv(ns_interfacemgr_t *mgr);
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void
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ns_interface_attach(ns_interface_t *source, ns_interface_t **target);
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void
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ns_interface_detach(ns_interface_t **targetp);
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void
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ns_interface_shutdown(ns_interface_t *ifp);
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/*%
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* Stop listening for queries on interface 'ifp'.
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* May safely be called multiple times.
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*/
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void
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ns_interfacemgr_dumprecursing(FILE *f, ns_interfacemgr_t *mgr);
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isc_boolean_t
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ns_interfacemgr_listeningon(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr);
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#endif /* NAMED_INTERFACEMGR_H */
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