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29 * @(#)look_up.c 8.1 (Berkeley) 6/6/93
30 * $FreeBSD: src/usr.bin/talk/look_up.c,v 1.5 1999/08/28 01:06:14 peter Exp $
33 #include <sys/param.h>
34 #include <sys/socket.h>
35 #include <protocols/talkd.h>
41 * See if the local daemon has an invitation for us.
46 CTL_RESPONSE response;
47 CTL_RESPONSE *rp = &response;
49 /* the rest of msg was set up in get_names */
51 /* copy new style sockaddr to old, swap family (short in old) */
52 msg.ctl_addr = *(struct osockaddr *)&ctl_addr;
53 msg.ctl_addr.sa_family = htons(ctl_addr.sin_family);
55 msg.ctl_addr = *(struct sockaddr *)&ctl_addr;
57 /* must be initiating a talk */
58 if (!look_for_invite(rp))
61 * There was an invitation waiting for us,
62 * so connect with the other (hopefully waiting) party
64 current_state = "Waiting to connect with caller";
66 if (rp->addr.sa_family != AF_INET)
67 p_error("Response uses invalid network address");
70 (struct sockaddr *)&rp->addr, sizeof (rp->addr)) != -1)
72 } while (errno == EINTR);
73 if (errno == ECONNREFUSED) {
75 * The caller gave up, but his invitation somehow
76 * was not cleared. Clear it and initiate an
77 * invitation. (We know there are no newer invitations,
78 * the talkd works LIFO.)
80 ctl_transact(his_machine_addr, msg, DELETE, rp);
85 p_error("Unable to connect with initiator");
91 * Look for an invitation on 'machine'
94 look_for_invite(CTL_RESPONSE *rp)
96 current_state = "Checking for invitation on caller's machine";
97 ctl_transact(his_machine_addr, msg, LOOK_UP, rp);
98 /* the switch is for later options, such as multiple invitations */
102 msg.id_num = htonl(rp->id_num);
106 /* there wasn't an invitation waiting for us */