1*3ffd98f9Stedu.\" $OpenBSD: talkd.8,v 1.10 2017/05/25 20:27:55 tedu Exp $ 2ebad6d3cSmickey.\" 3df930be7Sderaadt.\" Copyright (c) 1983, 1991 The Regents of the University of California. 4df930be7Sderaadt.\" All rights reserved. 5df930be7Sderaadt.\" 6df930be7Sderaadt.\" Redistribution and use in source and binary forms, with or without 7df930be7Sderaadt.\" modification, are permitted provided that the following conditions 8df930be7Sderaadt.\" are met: 9df930be7Sderaadt.\" 1. Redistributions of source code must retain the above copyright 10df930be7Sderaadt.\" notice, this list of conditions and the following disclaimer. 11df930be7Sderaadt.\" 2. Redistributions in binary form must reproduce the above copyright 12df930be7Sderaadt.\" notice, this list of conditions and the following disclaimer in the 13df930be7Sderaadt.\" documentation and/or other materials provided with the distribution. 14e33d3bd3Smillert.\" 3. Neither the name of the University nor the names of its contributors 15df930be7Sderaadt.\" may be used to endorse or promote products derived from this software 16df930be7Sderaadt.\" without specific prior written permission. 17df930be7Sderaadt.\" 18df930be7Sderaadt.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19df930be7Sderaadt.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20df930be7Sderaadt.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21df930be7Sderaadt.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22df930be7Sderaadt.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23df930be7Sderaadt.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24df930be7Sderaadt.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25df930be7Sderaadt.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26df930be7Sderaadt.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27df930be7Sderaadt.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28df930be7Sderaadt.\" SUCH DAMAGE. 29df930be7Sderaadt.\" 30df930be7Sderaadt.\" from: @(#)talkd.8 6.5 (Berkeley) 3/16/91 31*3ffd98f9Stedu.\" $Id: talkd.8,v 1.10 2017/05/25 20:27:55 tedu Exp $ 32df930be7Sderaadt.\" 33*3ffd98f9Stedu.Dd $Mdocdate: May 25 2017 $ 3464eefbd5Sjmc.Dt NTALKD 8 35fc8533a3Saaron.Os 36df930be7Sderaadt.Sh NAME 3764eefbd5Sjmc.Nm ntalkd 38df930be7Sderaadt.Nd remote user communication server 39df930be7Sderaadt.Sh SYNOPSIS 4064eefbd5Sjmc.Nm ntalkd 41df930be7Sderaadt.Sh DESCRIPTION 4264eefbd5Sjmc.Nm 43df930be7Sderaadtis the server that notifies a user that someone else wants to 44df930be7Sderaadtinitiate a conversation. 45ffb1448aSderaadtIt acts as a repository of invitations, responding to requests 46df930be7Sderaadtby clients wishing to rendezvous to hold a conversation. 47df930be7SderaadtIn normal operation, a client, the caller, 4812bc6069Sschwarzeinitiates a rendezvous by sending a CTL_MSG to the server 4912bc6069Sschwarzeof type 5012bc6069Sschwarze.Dv LOOK_UP 51df930be7Sderaadt(see 52369bef3aSschwarze.In protocols/talkd.h ) . 53df930be7SderaadtThis causes the server to search its invitation 54df930be7Sderaadttables to check if an invitation currently exists for the caller 55df930be7Sderaadt(to speak to the callee specified in the message). 56df930be7SderaadtIf the lookup fails, 57df930be7Sderaadtthe caller then sends an 5812bc6069Sschwarze.Dv ANNOUNCE 59df930be7Sderaadtmessage causing the server to 60df930be7Sderaadtbroadcast an announcement on the callee's login ports requesting contact. 61df930be7SderaadtWhen the callee responds, the local server uses the 62df930be7Sderaadtrecorded invitation to respond with the appropriate rendezvous 63df930be7Sderaadtaddress and the caller and callee client programs establish a 64df930be7Sderaadtstream connection through which the conversation takes place. 65df930be7Sderaadt.Sh SEE ALSO 66df930be7Sderaadt.Xr talk 1 , 67*3ffd98f9Stedu.Xr write 1 , 68*3ffd98f9Stedu.Xr inetd 8 69df930be7Sderaadt.Sh HISTORY 70df930be7SderaadtThe 71df930be7Sderaadt.Nm 72df930be7Sderaadtcommand appeared in 7364eefbd5Sjmc.Bx 4.3 , 7464eefbd5Sjmcas 7564eefbd5Sjmc.Nm talkd . 76