2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
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32 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 static const char sccsid[] = "@(#)invite.c 8.1 (Berkeley) 6/6/93";
40 #include <sys/types.h>
41 #include <sys/socket.h>
42 #include <protocols/talkd.h>
54 * There wasn't an invitation waiting, so send a request containing
55 * our sockt address to the remote talk daemon so it can invite
60 * The msg.id's for the invitations
61 * on the local and remote machines.
62 * These are used to delete the
65 static int local_id, remote_id;
66 static jmp_buf invitebuf;
72 struct itimerval itimer;
73 CTL_RESPONSE response;
75 itimer.it_value.tv_sec = RING_WAIT;
76 itimer.it_value.tv_usec = 0;
77 itimer.it_interval = itimer.it_value;
78 if (listen(sockt, 5) != 0)
79 p_error("Error on attempt to listen for caller");
81 /* copy new style sockaddr to old, swap family (short in old) */
82 msg.addr = *(struct osockaddr *)&my_addr; /* XXX new to old style*/
83 msg.addr.sa_family = htons(my_addr.sin_family);
85 msg.addr = *(struct sockaddr *)&my_addr;
87 msg.id_num = htonl(-1); /* an impossible id_num */
88 invitation_waiting = 1;
91 * Shut off the automatic messages for a while,
92 * so we can use the interrupt timer to resend the invitation
95 setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
96 message("Waiting for your party to respond");
97 signal(SIGALRM, re_invite);
98 (void) setjmp(invitebuf);
99 while ((new_sockt = accept(sockt, 0, 0)) < 0) {
102 p_error("Unable to connect with your party");
108 * Have the daemons delete the invitations now that we
111 current_state = "Waiting for your party to respond";
114 msg.id_num = htonl(local_id);
115 ctl_transact(my_machine_addr, msg, DELETE, &response);
116 msg.id_num = htonl(remote_id);
117 ctl_transact(his_machine_addr, msg, DELETE, &response);
118 invitation_waiting = 0;
122 * Routine called on interrupt to re-invite the callee
126 re_invite(int signo __unused)
129 message("Ringing your party again");
130 waddch(my_win.x_win, '\n');
131 if (current_line < my_win.x_nlines - 1)
133 /* force a re-announce */
134 msg.id_num = htonl(remote_id + 1);
136 longjmp(invitebuf, 1);
139 static const char *answers[] = {
140 "answer #0", /* SUCCESS */
141 "Your party is not logged on", /* NOT_HERE */
142 "Target machine is too confused to talk to us", /* FAILED */
143 "Target machine does not recognize us", /* MACHINE_UNKNOWN */
144 "Your party is refusing messages", /* PERMISSION_REFUSED */
145 "Target machine can not handle remote talk", /* UNKNOWN_REQUEST */
146 "Target machine indicates protocol mismatch", /* BADVERSION */
147 "Target machine indicates protocol botch (addr)",/* BADADDR */
148 "Target machine indicates protocol botch (ctl_addr)",/* BADCTLADDR */
150 #define NANSWERS (sizeof (answers) / sizeof (answers[0]))
153 * Transmit the invitation and process the response
156 announce_invite(void)
158 CTL_RESPONSE response;
160 current_state = "Trying to connect to your party's talk daemon";
161 ctl_transact(his_machine_addr, msg, ANNOUNCE, &response);
162 remote_id = response.id_num;
163 if (response.answer != SUCCESS) {
164 if (response.answer < NANSWERS)
165 message(answers[response.answer]);
168 /* leave the actual invitation on my talk daemon */
169 current_state = "Trying to connect to local talk daemon";
170 ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response);
171 local_id = response.id_num;
175 * Tell the daemon to remove your invitation
183 * This is just an extra clean up, so just send it
184 * and don't wait for an answer
186 msg.id_num = htonl(remote_id);
187 daemon_addr.sin_addr = his_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 (remote)");
192 msg.id_num = htonl(local_id);
193 daemon_addr.sin_addr = my_machine_addr;
194 if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
195 (struct sockaddr *)&daemon_addr,
196 sizeof (daemon_addr)) != sizeof (msg))
197 warn("send_delete (local)");