1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1994 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 #include "talk_ctl.h"
43 #include <sys/time.h>
44 #include <signal.h>
45 #include <setjmp.h>
46 #include <libintl.h>
47
48 #ifdef SYSV
49 #define signal(s, f) sigset(s, f)
50 #endif /* SYSV */
51
52 /*
53 * there wasn't an invitation waiting, so send a request containing
54 * our sockt address to the remote talk daemon so it can invite
55 * him
56 */
57
58 static int local_id, remote_id;
59
60 /*
61 * the msg.id's for the invitations
62 * on the local and remote machines.
63 * These are used to delete the invitations.
64 */
65
66 static jmp_buf invitebuf;
67
68 static void re_invite();
69 static void announce_invite();
70
71 void
invite_remote()72 invite_remote()
73 {
74 int new_sockt;
75 struct itimerval itimer;
76 CTL_RESPONSE response;
77
78 itimer.it_value.tv_sec = RING_WAIT;
79 itimer.it_value.tv_usec = 0;
80 itimer.it_interval = itimer.it_value;
81
82 if (listen(sockt, 5) != 0) {
83 p_error(gettext("Error on attempt to listen for caller"));
84 }
85
86 msg.addr = my_addr;
87 msg.id_num = -1; /* an impossible id_num */
88
89 invitation_waiting = 1;
90
91 announce_invite();
92
93 /*
94 * shut off the automatic messages for a while,
95 * so we can use the interupt timer to resend the invitation
96 */
97
98 end_msgs();
99 setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
100 message(gettext("Waiting for your party to respond"));
101 signal(SIGALRM, re_invite);
102 (void) setjmp(invitebuf);
103
104 while ((new_sockt = accept(sockt, 0, 0)) < 0) {
105 if (errno != EINTR) {
106 p_error(gettext("Unable to connect with your party"));
107 } else {
108 /* we just returned from a interupt, keep trying */
109 continue;
110 }
111 }
112
113 close(sockt);
114 sockt = new_sockt;
115
116 /*
117 * have the daemons delete the invitations now that we have connected.
118 */
119
120 current_state = strdup(gettext("Waiting for your party to respond"));
121 start_msgs();
122
123 msg.id_num = local_id;
124 ctl_transact(my_machine_addr, msg, DELETE, &response);
125 msg.id_num = remote_id;
126 ctl_transact(rem_machine_addr, msg, DELETE, &response);
127 invitation_waiting = 0;
128 }
129
130 /* routine called on interupt to re-invite the callee */
131
132 static void
re_invite()133 re_invite()
134 {
135 message(gettext("Ringing your party again"));
136 current_line++;
137 /* force a re-announce */
138 msg.id_num = remote_id + 1;
139 announce_invite();
140 longjmp(invitebuf, 1);
141 }
142
143 /* transmit the invitation and process the response */
144
145 static void
announce_invite()146 announce_invite()
147 {
148 CTL_RESPONSE response;
149
150 current_state =
151 gettext("Trying to connect to your party's talk daemon");
152
153 ctl_transact(rem_machine_addr, msg, ANNOUNCE, &response);
154 remote_id = response.id_num;
155
156 if (response.answer != SUCCESS) {
157
158 switch (response.answer) {
159
160 case NOT_HERE :
161 message(gettext("Your party is not logged on"));
162 break;
163
164 case MACHINE_UNKNOWN :
165 message(
166 gettext("Target machine does not recognize us"));
167 break;
168
169 case UNKNOWN_REQUEST :
170 message(
171 gettext("Target machine can not handle remote talk"));
172 break;
173
174 case FAILED :
175 message(
176 gettext("Target machine is too confused to talk to us"));
177 break;
178
179 case PERMISSION_DENIED :
180 message(gettext("Your party is refusing messages"));
181 break;
182 }
183
184 quit();
185 }
186
187 /* leave the actual invitation on my talk daemon */
188
189 ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response);
190 local_id = response.id_num;
191 }
192
193 void
send_delete()194 send_delete()
195 {
196
197 /* tell the daemon to remove your invitation */
198
199 msg.type = DELETE;
200
201 /*
202 * this is just a extra clean up, so just send it
203 * and don't wait for an answer
204 */
205
206 msg.id_num = remote_id;
207 daemon_addr.sin_addr = rem_machine_addr;
208 if (sendto(ctl_sockt, (char *)&msg, sizeof (CTL_MSG), 0,
209 (struct sockaddr *)&daemon_addr,
210 sizeof (daemon_addr)) != sizeof (CTL_MSG)) {
211 perror(gettext("send_delete remote"));
212 }
213
214 msg.id_num = local_id;
215 daemon_addr.sin_addr = my_machine_addr;
216 if (sendto(ctl_sockt, (char *)&msg, sizeof (CTL_MSG), 0,
217 (struct sockaddr *)&daemon_addr,
218 sizeof (daemon_addr)) != sizeof (CTL_MSG)) {
219 perror(gettext("send_delete local"));
220 }
221 }
222