2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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36 static char sccsid[] = "@(#)look_up.c 8.1 (Berkeley) 6/6/93";
38 static const char rcsid[] =
43 #include <sys/types.h>
44 #include <sys/socket.h>
45 #include <protocols/talkd.h>
50 * See if the local daemon has an invitation for us.
55 CTL_RESPONSE response;
56 register CTL_RESPONSE *rp = &response;
58 /* the rest of msg was set up in get_names */
60 /* copy new style sockaddr to old, swap family (short in old) */
61 msg.ctl_addr = *(struct osockaddr *)&ctl_addr;
62 msg.ctl_addr.sa_family = htons(ctl_addr.sin_family);
64 msg.ctl_addr = *(struct sockaddr *)&ctl_addr;
66 /* must be initiating a talk */
67 if (!look_for_invite(rp))
70 * There was an invitation waiting for us,
71 * so connect with the other (hopefully waiting) party
73 current_state = "Waiting to connect with caller";
75 if (rp->addr.sa_family != AF_INET)
76 p_error("Response uses invalid network address");
79 (struct sockaddr *)&rp->addr, sizeof (rp->addr)) != -1)
81 } while (errno == EINTR);
82 if (errno == ECONNREFUSED) {
84 * The caller gave up, but his invitation somehow
85 * was not cleared. Clear it and initiate an
86 * invitation. (We know there are no newer invitations,
87 * the talkd works LIFO.)
89 ctl_transact(his_machine_addr, msg, DELETE, rp);
94 p_error("Unable to connect with initiator");
100 * Look for an invitation on 'machine'
106 struct in_addr machine_addr;
108 current_state = "Checking for invitation on caller's machine";
109 ctl_transact(his_machine_addr, msg, LOOK_UP, rp);
110 /* the switch is for later options, such as multiple invitations */
111 switch (rp->answer) {
114 msg.id_num = htonl(rp->id_num);
118 /* there wasn't an invitation waiting for us */