1.\" $OpenBSD: slaacd.8,v 1.12 2023/03/02 17:09:54 jmc Exp $ 2.\" 3.\" Copyright (c) 2017 Florian Obser <florian@openbsd.org> 4.\" Copyright (c) 2016 Kenneth R Westerback <kwesterback@gmail.com> 5.\" 6.\" Permission to use, copy, modify, and distribute this software for any 7.\" purpose with or without fee is hereby granted, provided that the above 8.\" copyright notice and this permission notice appear in all copies. 9.\" 10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17.\" 18.Dd $Mdocdate: March 2 2023 $ 19.Dt SLAACD 8 20.Os 21.Sh NAME 22.Nm slaacd 23.Nd Stateless Address Autoconfiguration (SLAAC) daemon 24.Sh SYNOPSIS 25.Nm 26.Op Fl dv 27.Op Fl s Ar socket 28.Sh DESCRIPTION 29.Nm 30is a stateless address autoconfiguration (SLAAC) daemon for clients. 31It listens for IPv6 router advertisement messages, 32for example those sent by 33.Xr rad 8 , 34on interfaces with the 35.Sy AUTOCONF6 36flag set. 37.Nm 38derives IPv6 addresses and default routes from received router 39advertisements and installs them in the kernel. 40See 41.Xr hostname.if 5 42and 43.Xr ifconfig 8 44on how to enable auto configuration on an interface. 45.Pp 46.Nm 47monitors network interface states (interface going up or down, 48auto configuration enabled or disabled etc.) and sends router solicitations 49when necessary. 50.Pp 51A running 52.Nm 53can be controlled with the 54.Xr slaacctl 8 55utility. 56.Pp 57The options are as follows: 58.Bl -tag -width Ds 59.It Fl d 60Do not daemonize. 61If this option is specified, 62.Nm 63will run in the foreground and log to 64.Em stderr . 65.It Fl s Ar socket 66Use an alternate location for the default control socket. 67.It Fl v 68Produce more verbose output. 69Multiple 70.Fl v 71options increase the verbosity. 72.El 73.Sh FILES 74.Bl -tag -width "/dev/slaacd.sockXX" -compact 75.It Pa /dev/slaacd.sock 76.Ux Ns -domain 77socket used for communication with 78.Xr slaacctl 8 . 79.El 80.Sh SEE ALSO 81.Xr hostname.if 5 , 82.Xr ifconfig 8 , 83.Xr rad 8 , 84.Xr slaacctl 8 85.Sh STANDARDS 86.Rs 87.%A R. Draves 88.%A D. Thaler 89.%D November 2005 90.%R RFC 4191 91.%T Default Router Preferences and More-Specific Routes 92.Re 93.Pp 94.Rs 95.%A R. Hinden 96.%A S. Deering 97.%D February 2006 98.%R RFC 4291 99.%T IP Version 6 Addressing Architecture 100.Re 101.Pp 102.Rs 103.%A T. Narten 104.%A E. Nordmark 105.%A W. Simpson 106.%A H. Soliman 107.%D September 2007 108.%R RFC 4861 109.%T Neighbor Discovery for IP version 6 (IPv6) 110.Re 111.Pp 112.Rs 113.%A F. Gont 114.%D April 2014 115.%R RFC 7217 116.%T A Method for Generating Semantically Opaque Interface Identifiers with IPv6 Stateless Address Autoconfiguration (SLAAC) 117.Re 118.Pp 119.Rs 120.%A A. Yourtchenko 121.%A L. Colitti 122.%D February 2016 123.%R RFC 7772 124.%T Reducing Energy Consumption of Router Advertisements 125.Re 126.Pp 127.Rs 128.%A F. Gont 129.%A A. Cooper 130.%A D. Thaler 131.%A W. Liu 132.%D February 2017 133.%R RFC 8064 134.%T Recommendation on Stable IPv6 Interface Identifiers 135.Re 136.Pp 137.Rs 138.%A J. Jeong 139.%A S. Park 140.%A L. Beloeil 141.%A S. Madanapalli 142.%D March 2017 143.%R RFC 8106 144.%T IPv6 Router Advertisement Options for DNS Configuration 145.Re 146.Pp 147.Rs 148.%A F. Gont 149.%A S. Krishnan 150.%A T. Narten 151.%A R. Draves 152.%D February 2021 153.%R RFC 8981 154.%T Temporary Address Extensions for Stateless Address Autoconfiguration in IPv6 155.Re 156.Sh HISTORY 157The 158.Nm 159program first appeared in 160.Ox 6.2 . 161.Sh AUTHORS 162.An -nosplit 163The 164.Nm 165program was written by 166.An Florian Obser Aq Mt florian@openbsd.org . 167