0,0 → 1,124 |
/*!\file protocol/talkd.h |
* Talk server/client definitions. |
*/ |
|
/* $NetBSD: talkd.h,v 1.5 1995/03/04 07:59:30 cgd Exp $ */ |
|
/* |
* Copyright (c) 1983 Regents of the University of California. |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* 1. Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* must display the following acknowledgement: |
* This product includes software developed by the University of |
* California, Berkeley and its contributors. |
* 4. Neither the name of the University nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* |
* @(#)talkd.h 5.7 (Berkeley) 4/3/91 |
*/ |
|
#ifndef __PROTOCOL_TALKD_H |
#define __PROTOCOL_TALKD_H |
|
/* |
* This describes the protocol used by the talk server and clients. |
* |
* The talk server acts a repository of invitations, responding to |
* requests by clients wishing to rendezvous for the purpose of |
* holding a conversation. In normal operation, a client, the caller, |
* initiates a rendezvous by sending a CTL_MSG to the server of |
* type LOOK_UP. This causes the server to search its invitation |
* tables to check if an invitation currently exists for the caller |
* (to speak to the callee specified in the message). If the lookup |
* fails, the caller then sends an ANNOUNCE message causing the server |
* to broadcast an announcement on the callee's login ports requesting |
* contact. When the callee responds, the local server uses the |
* recorded invitation to respond with the appropriate rendezvous |
* address and the caller and callee client programs establish a |
* stream connection through which the conversation takes place. |
*/ |
|
#include <sys/packon.h> |
|
/* |
* Client->server request message format. |
*/ |
typedef struct { |
u_char vers; /* protocol version */ |
u_char type; /* request type, see below */ |
u_char answer; /* not used */ |
u_char pad; |
u_int32_t id_num; /* message id */ |
struct osockaddr addr; /* old (4.3) style */ |
struct osockaddr ctl_addr; /* old (4.3) style */ |
int32_t pid; /* caller's process id */ |
#define NAME_SIZE 12 |
char l_name[NAME_SIZE]; /* caller's name */ |
char r_name[NAME_SIZE]; /* callee's name */ |
#define TTY_SIZE 16 |
char r_tty[TTY_SIZE]; /* callee's tty name */ |
} CTL_MSG; |
|
/* |
* Server->client response message format. |
*/ |
typedef struct { |
u_char vers; /* protocol version */ |
u_char type; /* type of request message, see below */ |
u_char answer; /* respose to request message, see below */ |
u_char pad; |
u_int32_t id_num; /* message id */ |
struct osockaddr addr; /* address for establishing conversation */ |
} CTL_RESPONSE; |
|
#include <sys/packoff.h> |
|
#define TALK_VERSION 1 /* protocol version */ |
|
/* message type values */ |
#define LEAVE_INVITE 0 /* leave invitation with server */ |
#define LOOK_UP 1 /* check for invitation by callee */ |
#define DELETE 2 /* delete invitation by caller */ |
#define ANNOUNCE 3 /* announce invitation by caller */ |
|
/* answer values */ |
#define SUCCESS 0 /* operation completed properly */ |
#define NOT_HERE 1 /* callee not logged in */ |
#define FAILED 2 /* operation failed for unexplained reason */ |
#define MACHINE_UNKNOWN 3 /* caller's machine name unknown */ |
#define PERMISSION_DENIED 4 /* callee's tty doesn't permit announce */ |
#define UNKNOWN_REQUEST 5 /* request has invalid type value */ |
#define BADVERSION 6 /* request has invalid protocol version */ |
#define BADADDR 7 /* request has invalid addr value */ |
#define BADCTLADDR 8 /* request has invalid ctl_addr value */ |
|
/* |
* Operational parameters. |
*/ |
#define MAX_LIFE 60 /* max time daemon saves invitations */ |
/* RING_WAIT should be 10's of seconds less than MAX_LIFE */ |
#define RING_WAIT 30 /* time to wait before resending invitation */ |
|
#endif |