| | 1 | /* |
| | 2 | * Copyright (c) 2000, 2006, 2007 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. Please obtain a copy of the License at |
| | 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 11 | * file. |
| | 12 | * |
| | 13 | * The Original Code and all software distributed under the License are |
| | 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 18 | * Please see the License for the specific language governing rights and |
| | 19 | * limitations under the License. |
| | 20 | * |
| | 21 | * @APPLE_LICENSE_HEADER_END@ |
| | 22 | */ |
| | 23 | /* |
| | 24 | * Copyright (c) 1983, 1993 |
| | 25 | * The Regents of the University of California. All rights reserved. |
| | 26 | * |
| | 27 | * Redistribution and use in source and binary forms, with or without |
| | 28 | * modification, are permitted provided that the following conditions |
| | 29 | * are met: |
| | 30 | * 1. Redistributions of source code must retain the above copyright |
| | 31 | * notice, this list of conditions and the following disclaimer. |
| | 32 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 33 | * notice, this list of conditions and the following disclaimer in the |
| | 34 | * documentation and/or other materials provided with the distribution. |
| | 35 | * 3. All advertising materials mentioning features or use of this software |
| | 36 | * must display the following acknowledgement: |
| | 37 | * This product includes software developed by the University of |
| | 38 | * California, Berkeley and its contributors. |
| | 39 | * 4. Neither the name of the University nor the names of its contributors |
| | 40 | * may be used to endorse or promote products derived from this software |
| | 41 | * without specific prior written permission. |
| | 42 | * |
| | 43 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 44 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 45 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 46 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 47 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 48 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 49 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 50 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 51 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 52 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 53 | * SUCH DAMAGE. |
| | 54 | * |
| | 55 | * @(#)talkd.h 8.1 (Berkeley) 6/2/93 |
| | 56 | */ |
| | 57 | |
| | 58 | #ifndef _TALKD_H_ |
| | 59 | #define _TALKD_H_ |
| | 60 | |
| | 61 | /* |
| | 62 | * This describes the protocol used by the talk server and clients. |
| | 63 | * |
| | 64 | * The talk server acts a repository of invitations, responding to |
| | 65 | * requests by clients wishing to rendezvous for the purpose of |
| | 66 | * holding a conversation. In normal operation, a client, the caller, |
| | 67 | * initiates a rendezvous by sending a CTL_MSG to the server of |
| | 68 | * type LOOK_UP. This causes the server to search its invitation |
| | 69 | * tables to check if an invitation currently exists for the caller |
| | 70 | * (to speak to the callee specified in the message). If the lookup |
| | 71 | * fails, the caller then sends an ANNOUNCE message causing the server |
| | 72 | * to broadcast an announcement on the callee's login ports requesting |
| | 73 | * contact. When the callee responds, the local server uses the |
| | 74 | * recorded invitation to respond with the appropriate rendezvous |
| | 75 | * address and the caller and callee client programs establish a |
| | 76 | * stream connection through which the conversation takes place. |
| | 77 | */ |
| | 78 | |
| | 79 | /* |
| | 80 | * 4.3 compat sockaddr |
| | 81 | */ |
| | 82 | #include <_types.h> |
| | 83 | struct osockaddr { |
| | 84 | __uint16_t sa_family; /* address family */ |
| | 85 | char sa_data[14]; /* up to 14 bytes of direct address */ |
| | 86 | }; |
| | 87 | |
| | 88 | /* |
| | 89 | * Client->server request message format. |
| | 90 | */ |
| | 91 | typedef struct { |
| | 92 | unsigned char vers; /* protocol version */ |
| | 93 | unsigned char type; /* request type, see below */ |
| | 94 | unsigned char answer; /* not used */ |
| | 95 | unsigned char pad; |
| | 96 | #ifdef __LP64__ |
| | 97 | unsigned int id_num; /* message id */ |
| | 98 | #else /* !__LP64__ */ |
| | 99 | unsigned long id_num; /* message id */ |
| | 100 | #endif /* __LP64__ */ |
| | 101 | struct osockaddr addr; /* old (4.3) style */ |
| | 102 | struct osockaddr ctl_addr; /* old (4.3) style */ |
| | 103 | #ifdef __LP64__ |
| | 104 | int pid; /* caller's process id */ |
| | 105 | #else /* !__LP64__ */ |
| | 106 | long pid; /* caller's process id */ |
| | 107 | #endif /* __LP64__ */ |
| | 108 | #define NAME_SIZE 12 |
| | 109 | char l_name[NAME_SIZE];/* caller's name */ |
| | 110 | char r_name[NAME_SIZE];/* callee's name */ |
| | 111 | #define TTY_SIZE 16 |
| | 112 | char r_tty[TTY_SIZE];/* callee's tty name */ |
| | 113 | } CTL_MSG; |
| | 114 | |
| | 115 | /* |
| | 116 | * Server->client response message format. |
| | 117 | */ |
| | 118 | typedef struct { |
| | 119 | unsigned char vers; /* protocol version */ |
| | 120 | unsigned char type; /* type of request message, see below */ |
| | 121 | unsigned char answer; /* respose to request message, see below */ |
| | 122 | unsigned char pad; |
| | 123 | #ifdef __LP64__ |
| | 124 | unsigned int id_num; /* message id */ |
| | 125 | #else /* !__LP64__ */ |
| | 126 | unsigned long id_num; /* message id */ |
| | 127 | #endif /* __LP64__ */ |
| | 128 | struct osockaddr addr; /* address for establishing conversation */ |
| | 129 | } CTL_RESPONSE; |
| | 130 | |
| | 131 | #define TALK_VERSION 1 /* protocol version */ |
| | 132 | |
| | 133 | /* message type values */ |
| | 134 | #define LEAVE_INVITE 0 /* leave invitation with server */ |
| | 135 | #define LOOK_UP 1 /* check for invitation by callee */ |
| | 136 | #define DELETE 2 /* delete invitation by caller */ |
| | 137 | #define ANNOUNCE 3 /* announce invitation by caller */ |
| | 138 | |
| | 139 | /* answer values */ |
| | 140 | #define SUCCESS 0 /* operation completed properly */ |
| | 141 | #define NOT_HERE 1 /* callee not logged in */ |
| | 142 | #define FAILED 2 /* operation failed for unexplained reason */ |
| | 143 | #define MACHINE_UNKNOWN 3 /* caller's machine name unknown */ |
| | 144 | #define PERMISSION_DENIED 4 /* callee's tty doesn't permit announce */ |
| | 145 | #define UNKNOWN_REQUEST 5 /* request has invalid type value */ |
| | 146 | #define BADVERSION 6 /* request has invalid protocol version */ |
| | 147 | #define BADADDR 7 /* request has invalid addr value */ |
| | 148 | #define BADCTLADDR 8 /* request has invalid ctl_addr value */ |
| | 149 | |
| | 150 | /* |
| | 151 | * Operational parameters. |
| | 152 | */ |
| | 153 | #define MAX_LIFE 60 /* max time daemon saves invitations */ |
| | 154 | /* RING_WAIT should be 10's of seconds less than MAX_LIFE */ |
| | 155 | #define RING_WAIT 30 /* time to wait before resending invitation */ |
| | 156 | |
| | 157 | #endif /* !_TALKD_H_ */ |
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