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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 $
37 #include <sys/param.h>
38 #include <sys/socket.h>
43 #include <protocols/talkd.h>
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
54 * The msg.id's for the invitations
55 * on the local and remote machines.
56 * These are used to delete the
59 int local_id, remote_id;
66 struct itimerval itimer;
67 CTL_RESPONSE response;
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");
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);
79 msg.addr = *(struct sockaddr *)&my_addr;
81 msg.id_num = htonl(-1); /* an impossible id_num */
82 invitation_waiting = 1;
85 * Shut off the automatic messages for a while,
86 * so we can use the interupt timer to resend the invitation
89 setitimer(ITIMER_REAL, &itimer, NULL);
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) {
96 p_error("Unable to connect with your party");
102 * Have the daemons delete the invitations now that we
105 current_state = "Waiting for your party to respond";
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;
116 * Routine called on interupt to re-invite the callee
120 re_invite(int signo __unused)
123 message("Ringing your party again");
124 waddch(my_win.x_win, '\n');
125 if (current_line < my_win.x_nlines - 1)
127 /* force a re-announce */
128 msg.id_num = htonl(remote_id + 1);
130 longjmp(invitebuf, 1);
133 static const char *answers[] = {
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 */
144 #define NANSWERS (sizeof (answers) / sizeof (answers[0]))
147 * Transmit the invitation and process the response
150 announce_invite(void)
152 CTL_RESPONSE response;
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]);
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;
169 * Tell the daemon to remove your invitation
177 * This is just a extra clean up, so just send it
178 * and don't wait for an answer
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)");