1*48a54d36SAndroid Build Coastguard Worker.\" -*- tab-width: 4 -*- 2*48a54d36SAndroid Build Coastguard Worker.\" 3*48a54d36SAndroid Build Coastguard Worker.\" Copyright (c) 2004 Apple Computer, Inc. All Rights Reserved. 4*48a54d36SAndroid Build Coastguard Worker.\" 5*48a54d36SAndroid Build Coastguard Worker.\" Licensed under the Apache License, Version 2.0 (the "License"); 6*48a54d36SAndroid Build Coastguard Worker.\" you may not use this file except in compliance with the License. 7*48a54d36SAndroid Build Coastguard Worker.\" You may obtain a copy of the License at 8*48a54d36SAndroid Build Coastguard Worker.\" 9*48a54d36SAndroid Build Coastguard Worker.\" http://www.apache.org/licenses/LICENSE-2.0 10*48a54d36SAndroid Build Coastguard Worker.\" 11*48a54d36SAndroid Build Coastguard Worker.\" Unless required by applicable law or agreed to in writing, software 12*48a54d36SAndroid Build Coastguard Worker.\" distributed under the License is distributed on an "AS IS" BASIS, 13*48a54d36SAndroid Build Coastguard Worker.\" WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14*48a54d36SAndroid Build Coastguard Worker.\" See the License for the specific language governing permissions and 15*48a54d36SAndroid Build Coastguard Worker.\" limitations under the License. 16*48a54d36SAndroid Build Coastguard Worker.\" 17*48a54d36SAndroid Build Coastguard Worker.Dd August 2004 \" Date 18*48a54d36SAndroid Build Coastguard Worker.Dt dnsextd 8 \" Document Title 19*48a54d36SAndroid Build Coastguard Worker.Os Darwin \" Operating System 20*48a54d36SAndroid Build Coastguard Worker.\" 21*48a54d36SAndroid Build Coastguard Worker.Sh NAME 22*48a54d36SAndroid Build Coastguard Worker.Nm dnsextd 23*48a54d36SAndroid Build Coastguard Worker.Nd BIND Extension Daemon \" Name Description for whatis database 24*48a54d36SAndroid Build Coastguard Worker.\" 25*48a54d36SAndroid Build Coastguard Worker.Sh SYNOPSIS 26*48a54d36SAndroid Build Coastguard Worker.Nm 27*48a54d36SAndroid Build Coastguard Worker.\" 28*48a54d36SAndroid Build Coastguard Worker.Sh DESCRIPTION 29*48a54d36SAndroid Build Coastguard Worker.Nm 30*48a54d36SAndroid Build Coastguard Workeris a daemon invoked at boot time, running alongside BIND 9, 31*48a54d36SAndroid Build Coastguard Workerto implement two EDNS0 extensions to the standard DNS protocol. 32*48a54d36SAndroid Build Coastguard Worker.Pp 33*48a54d36SAndroid Build Coastguard Worker.Nm 34*48a54d36SAndroid Build Coastguard Workerallows clients to perform DNS Updates with an attached lease lifetime, 35*48a54d36SAndroid Build Coastguard Workerso that if the client crashes or is disconnected from the network, its 36*48a54d36SAndroid Build Coastguard Workeraddress records will be automatically deleted after the lease expires. 37*48a54d36SAndroid Build Coastguard Worker.Pp 38*48a54d36SAndroid Build Coastguard Worker.Nm 39*48a54d36SAndroid Build Coastguard Workerallows clients to perform long-lived queries. Instead of rapidly polling 40*48a54d36SAndroid Build Coastguard Workerthe server to discover when information changes, long-lived queries 41*48a54d36SAndroid Build Coastguard Workerenable a client to indicate its interest in some set of data, and then 42*48a54d36SAndroid Build Coastguard Workerbe notified asynchronously by the server whenever any of that data changes. 43*48a54d36SAndroid Build Coastguard Worker.Pp 44*48a54d36SAndroid Build Coastguard Worker.Nm 45*48a54d36SAndroid Build Coastguard Workerhas no user-specifiable command-line argument, and users should not run 46*48a54d36SAndroid Build Coastguard Worker.Nm 47*48a54d36SAndroid Build Coastguard Workermanually. 48*48a54d36SAndroid Build Coastguard Worker.\" 49*48a54d36SAndroid Build Coastguard Worker.Sh SEE ALSO 50*48a54d36SAndroid Build Coastguard Worker.Xr mDNS 1 51*48a54d36SAndroid Build Coastguard Worker.Xr mDNSResponder 8 52*48a54d36SAndroid Build Coastguard Worker.Pp 53*48a54d36SAndroid Build Coastguard WorkerFor information on Dynamic DNS Update, see RFC 2136 54*48a54d36SAndroid Build Coastguard Worker"Dynamic Updates in the Domain Name System (DNS UPDATE)" 55*48a54d36SAndroid Build Coastguard Worker.Pp 56*48a54d36SAndroid Build Coastguard WorkerFor information on Dynamic DNS Update Leases, see 57*48a54d36SAndroid Build Coastguard Worker.Pa http://files.dns-sd.org/draft-dns-update-leases.txt 58*48a54d36SAndroid Build Coastguard Worker.Pp 59*48a54d36SAndroid Build Coastguard WorkerFor information on Long-Lived Queries, see 60*48a54d36SAndroid Build Coastguard Worker.Pa http://files.dns-sd.org/draft-dns-llq.txt 61*48a54d36SAndroid Build Coastguard Worker.\" 62*48a54d36SAndroid Build Coastguard Worker.Sh BUGS 63*48a54d36SAndroid Build Coastguard Worker.Nm 64*48a54d36SAndroid Build Coastguard Workerbugs are tracked in Apple Radar component "mDNSResponder". 65*48a54d36SAndroid Build Coastguard Worker.\" 66*48a54d36SAndroid Build Coastguard Worker.Sh HISTORY 67*48a54d36SAndroid Build Coastguard WorkerThe 68*48a54d36SAndroid Build Coastguard Worker.Nm 69*48a54d36SAndroid Build Coastguard Workerdaemon first appeared in Mac OS X 10.4 (Tiger). 70