2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
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13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 static const char sccsid[] = "@(#)invite.c 8.1 (Berkeley) 6/6/93";
38 #include <sys/types.h>
39 #include <sys/socket.h>
40 #include <protocols/talkd.h>
52 * There wasn't an invitation waiting, so send a request containing
53 * our sockt address to the remote talk daemon so it can invite
58 * The msg.id's for the invitations
59 * on the local and remote machines.
60 * These are used to delete the
63 int local_id, remote_id;
70 struct itimerval itimer;
71 CTL_RESPONSE response;
73 itimer.it_value.tv_sec = RING_WAIT;
74 itimer.it_value.tv_usec = 0;
75 itimer.it_interval = itimer.it_value;
76 if (listen(sockt, 5) != 0)
77 p_error("Error on attempt to listen for caller");
79 /* copy new style sockaddr to old, swap family (short in old) */
80 msg.addr = *(struct osockaddr *)&my_addr; /* XXX new to old style*/
81 msg.addr.sa_family = htons(my_addr.sin_family);
83 msg.addr = *(struct sockaddr *)&my_addr;
85 msg.id_num = htonl(-1); /* an impossible id_num */
86 invitation_waiting = 1;
89 * Shut off the automatic messages for a while,
90 * so we can use the interupt timer to resend the invitation
93 setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
94 message("Waiting for your party to respond");
95 signal(SIGALRM, re_invite);
96 (void) setjmp(invitebuf);
97 while ((new_sockt = accept(sockt, 0, 0)) < 0) {
100 p_error("Unable to connect with your party");
106 * Have the daemons delete the invitations now that we
109 current_state = "Waiting for your party to respond";
112 msg.id_num = htonl(local_id);
113 ctl_transact(my_machine_addr, msg, DELETE, &response);
114 msg.id_num = htonl(remote_id);
115 ctl_transact(his_machine_addr, msg, DELETE, &response);
116 invitation_waiting = 0;
120 * Routine called on interupt to re-invite the callee
124 re_invite(int signo __unused)
127 message("Ringing your party again");
128 waddch(my_win.x_win, '\n');
129 if (current_line < my_win.x_nlines - 1)
131 /* force a re-announce */
132 msg.id_num = htonl(remote_id + 1);
134 longjmp(invitebuf, 1);
137 static const char *answers[] = {
138 "answer #0", /* SUCCESS */
139 "Your party is not logged on", /* NOT_HERE */
140 "Target machine is too confused to talk to us", /* FAILED */
141 "Target machine does not recognize us", /* MACHINE_UNKNOWN */
142 "Your party is refusing messages", /* PERMISSION_REFUSED */
143 "Target machine can not handle remote talk", /* UNKNOWN_REQUEST */
144 "Target machine indicates protocol mismatch", /* BADVERSION */
145 "Target machine indicates protocol botch (addr)",/* BADADDR */
146 "Target machine indicates protocol botch (ctl_addr)",/* BADCTLADDR */
148 #define NANSWERS (sizeof (answers) / sizeof (answers[0]))
151 * Transmit the invitation and process the response
154 announce_invite(void)
156 CTL_RESPONSE response;
158 current_state = "Trying to connect to your party's talk daemon";
159 ctl_transact(his_machine_addr, msg, ANNOUNCE, &response);
160 remote_id = response.id_num;
161 if (response.answer != SUCCESS) {
162 if (response.answer < NANSWERS)
163 message(answers[response.answer]);
166 /* leave the actual invitation on my talk daemon */
167 current_state = "Trying to connect to local talk daemon";
168 ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response);
169 local_id = response.id_num;
173 * Tell the daemon to remove your invitation
181 * This is just an extra clean up, so just send it
182 * and don't wait for an answer
184 msg.id_num = htonl(remote_id);
185 daemon_addr.sin_addr = his_machine_addr;
186 if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
187 (struct sockaddr *)&daemon_addr,
188 sizeof (daemon_addr)) != sizeof(msg))
189 warn("send_delete (remote)");
190 msg.id_num = htonl(local_id);
191 daemon_addr.sin_addr = my_machine_addr;
192 if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
193 (struct sockaddr *)&daemon_addr,
194 sizeof (daemon_addr)) != sizeof (msg))
195 warn("send_delete (local)");