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Diffstat (limited to 'inet/protocols/talkd.h')
| -rw-r--r-- | inet/protocols/talkd.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/inet/protocols/talkd.h b/inet/protocols/talkd.h new file mode 100644 index 0000000000..0d30d5bfa3 --- /dev/null +++ b/inet/protocols/talkd.h @@ -0,0 +1,114 @@ +/* + * Copyright (c) 1983, 1993 + * The 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 8.1 (Berkeley) 6/2/93 + */ + +#ifndef _TALKD_H_ +#define _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. + */ + +/* + * 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_long id_num; /* message id */ + struct osockaddr addr; /* old (4.3) style */ + struct osockaddr ctl_addr; /* old (4.3) style */ + long 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_long id_num; /* message id */ + struct osockaddr addr; /* address for establishing conversation */ +} CTL_RESPONSE; + +#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 /* !_TALKD_H_ */ |