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
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char sccsid[] = "@(#)invite.c 8.1 (Berkeley) 6/6/93";
42 #include <sys/types.h>
43 #include <sys/socket.h>
44 #include <protocols/talkd.h>
55 * There wasn't an invitation waiting, so send a request containing
56 * our sockt address to the remote talk daemon so it can invite
61 * The msg.id's for the invitations
62 * on the local and remote machines.
63 * These are used to delete the
66 int local_id, remote_id;
73 struct itimerval itimer;
74 CTL_RESPONSE response;
76 itimer.it_value.tv_sec = RING_WAIT;
77 itimer.it_value.tv_usec = 0;
78 itimer.it_interval = itimer.it_value;
79 if (listen(sockt, 5) != 0)
80 p_error("Error on attempt to listen for caller");
82 /* copy new style sockaddr to old, swap family (short in old) */
83 msg.addr = *(struct osockaddr *)&my_addr; /* XXX new to old style*/
84 msg.addr.sa_family = htons(my_addr.sin_family);
86 msg.addr = *(struct sockaddr *)&my_addr;
88 msg.id_num = htonl(-1); /* an impossible id_num */
89 invitation_waiting = 1;
92 * Shut off the automatic messages for a while,
93 * so we can use the interupt timer to resend the invitation
96 setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
97 message("Waiting for your party to respond");
98 signal(SIGALRM, re_invite);
99 (void) setjmp(invitebuf);
100 while ((new_sockt = accept(sockt, 0, 0)) < 0) {
103 p_error("Unable to connect with your party");
109 * Have the daemons delete the invitations now that we
112 current_state = "Waiting for your party to respond";
115 msg.id_num = htonl(local_id);
116 ctl_transact(my_machine_addr, msg, DELETE, &response);
117 msg.id_num = htonl(remote_id);
118 ctl_transact(his_machine_addr, msg, DELETE, &response);
119 invitation_waiting = 0;
123 * Routine called on interupt to re-invite the callee
127 re_invite(int signo __unused)
130 message("Ringing your party again");
131 waddch(my_win.x_win, '\n');
132 if (current_line < my_win.x_nlines - 1)
134 /* force a re-announce */
135 msg.id_num = htonl(remote_id + 1);
137 longjmp(invitebuf, 1);
140 static const char *answers[] = {
141 "answer #0", /* SUCCESS */
142 "Your party is not logged on", /* NOT_HERE */
143 "Target machine is too confused to talk to us", /* FAILED */
144 "Target machine does not recognize us", /* MACHINE_UNKNOWN */
145 "Your party is refusing messages", /* PERMISSION_REFUSED */
146 "Target machine can not handle remote talk", /* UNKNOWN_REQUEST */
147 "Target machine indicates protocol mismatch", /* BADVERSION */
148 "Target machine indicates protocol botch (addr)",/* BADADDR */
149 "Target machine indicates protocol botch (ctl_addr)",/* BADCTLADDR */
151 #define NANSWERS (sizeof (answers) / sizeof (answers[0]))
154 * Transmit the invitation and process the response
157 announce_invite(void)
159 CTL_RESPONSE response;
161 current_state = "Trying to connect to your party's talk daemon";
162 ctl_transact(his_machine_addr, msg, ANNOUNCE, &response);
163 remote_id = response.id_num;
164 if (response.answer != SUCCESS) {
165 if (response.answer < NANSWERS)
166 message(answers[response.answer]);
169 /* leave the actual invitation on my talk daemon */
170 current_state = "Trying to connect to local talk daemon";
171 ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response);
172 local_id = response.id_num;
176 * Tell the daemon to remove your invitation
184 * This is just an extra clean up, so just send it
185 * and don't wait for an answer
187 msg.id_num = htonl(remote_id);
188 daemon_addr.sin_addr = his_machine_addr;
189 if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
190 (struct sockaddr *)&daemon_addr,
191 sizeof (daemon_addr)) != sizeof(msg))
192 warn("send_delete (remote)");
193 msg.id_num = htonl(local_id);
194 daemon_addr.sin_addr = my_machine_addr;
195 if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
196 (struct sockaddr *)&daemon_addr,
197 sizeof (daemon_addr)) != sizeof (msg))
198 warn("send_delete (local)");