talk(1): Raise WARNS to 6 and fix warnings.
[dragonfly.git] / usr.bin / talk / invite.c
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1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)invite.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/talk/invite.c,v 1.6.2.1 2000/10/05 17:40:38 ru Exp $
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35 */
36
800c4f63
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37#include <sys/param.h>
38#include <sys/socket.h>
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39#include <err.h>
40#include <errno.h>
41#include <setjmp.h>
42#include <signal.h>
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43#include <protocols/talkd.h>
44#include "talk_ctl.h"
45#include "talk.h"
46
47/*
48 * There wasn't an invitation waiting, so send a request containing
49 * our sockt address to the remote talk daemon so it can invite
50 * him
51 */
52
53/*
54 * The msg.id's for the invitations
55 * on the local and remote machines.
56 * These are used to delete the
57 * invitations.
58 */
59int local_id, remote_id;
60jmp_buf invitebuf;
61
62void
1d1731fa 63invite_remote(void)
984263bc 64{
e2daa382 65 int new_sockt;
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66 struct itimerval itimer;
67 CTL_RESPONSE response;
68
69 itimer.it_value.tv_sec = RING_WAIT;
70 itimer.it_value.tv_usec = 0;
71 itimer.it_interval = itimer.it_value;
72 if (listen(sockt, 5) != 0)
73 p_error("Error on attempt to listen for caller");
74#ifdef MSG_EOR
75 /* copy new style sockaddr to old, swap family (short in old) */
76 msg.addr = *(struct osockaddr *)&my_addr; /* XXX new to old style*/
77 msg.addr.sa_family = htons(my_addr.sin_family);
78#else
79 msg.addr = *(struct sockaddr *)&my_addr;
80#endif
81 msg.id_num = htonl(-1); /* an impossible id_num */
82 invitation_waiting = 1;
83 announce_invite();
84 /*
85 * Shut off the automatic messages for a while,
86 * so we can use the interupt timer to resend the invitation
87 */
88 end_msgs();
60233e58 89 setitimer(ITIMER_REAL, &itimer, NULL);
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90 message("Waiting for your party to respond");
91 signal(SIGALRM, re_invite);
92 (void) setjmp(invitebuf);
93 while ((new_sockt = accept(sockt, 0, 0)) < 0) {
94 if (errno == EINTR)
95 continue;
96 p_error("Unable to connect with your party");
97 }
98 close(sockt);
99 sockt = new_sockt;
100
101 /*
102 * Have the daemons delete the invitations now that we
103 * have connected.
104 */
105 current_state = "Waiting for your party to respond";
106 start_msgs();
107
108 msg.id_num = htonl(local_id);
109 ctl_transact(my_machine_addr, msg, DELETE, &response);
110 msg.id_num = htonl(remote_id);
111 ctl_transact(his_machine_addr, msg, DELETE, &response);
112 invitation_waiting = 0;
113}
114
115/*
116 * Routine called on interupt to re-invite the callee
117 */
118/* ARGSUSED */
119void
e2daa382 120re_invite(int signo __unused)
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121{
122
123 message("Ringing your party again");
124 waddch(my_win.x_win, '\n');
125 if (current_line < my_win.x_nlines - 1)
126 current_line++;
127 /* force a re-announce */
128 msg.id_num = htonl(remote_id + 1);
129 announce_invite();
130 longjmp(invitebuf, 1);
131}
132
e2daa382 133static const char *answers[] = {
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134 "answer #0", /* SUCCESS */
135 "Your party is not logged on", /* NOT_HERE */
136 "Target machine is too confused to talk to us", /* FAILED */
137 "Target machine does not recognize us", /* MACHINE_UNKNOWN */
138 "Your party is refusing messages", /* PERMISSION_REFUSED */
139 "Target machine can not handle remote talk", /* UNKNOWN_REQUEST */
140 "Target machine indicates protocol mismatch", /* BADVERSION */
141 "Target machine indicates protocol botch (addr)",/* BADADDR */
142 "Target machine indicates protocol botch (ctl_addr)",/* BADCTLADDR */
143};
144#define NANSWERS (sizeof (answers) / sizeof (answers[0]))
145
146/*
147 * Transmit the invitation and process the response
148 */
149void
1d1731fa 150announce_invite(void)
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151{
152 CTL_RESPONSE response;
153
154 current_state = "Trying to connect to your party's talk daemon";
155 ctl_transact(his_machine_addr, msg, ANNOUNCE, &response);
156 remote_id = response.id_num;
157 if (response.answer != SUCCESS) {
158 if (response.answer < NANSWERS)
159 message(answers[response.answer]);
160 quit();
161 }
162 /* leave the actual invitation on my talk daemon */
163 current_state = "Trying to connect to local talk daemon";
164 ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response);
165 local_id = response.id_num;
166}
167
168/*
169 * Tell the daemon to remove your invitation
170 */
171void
1d1731fa 172send_delete(void)
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173{
174
175 msg.type = DELETE;
176 /*
177 * This is just a extra clean up, so just send it
178 * and don't wait for an answer
179 */
180 msg.id_num = htonl(remote_id);
181 daemon_addr.sin_addr = his_machine_addr;
182 if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
183 (struct sockaddr *)&daemon_addr,
184 sizeof (daemon_addr)) != sizeof(msg))
185 warn("send_delete (remote)");
186 msg.id_num = htonl(local_id);
187 daemon_addr.sin_addr = my_machine_addr;
188 if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
189 (struct sockaddr *)&daemon_addr,
190 sizeof (daemon_addr)) != sizeof (msg))
191 warn("send_delete (local)");
192}