2 * Copyright (c) 1983, 1993
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30 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 static const char sccsid[] = "@(#)look_up.c 8.1 (Berkeley) 6/6/93";
38 #include <sys/types.h>
39 #include <sys/socket.h>
40 #include <protocols/talkd.h>
50 * See if the local daemon has an invitation for us.
55 CTL_RESPONSE response;
56 CTL_RESPONSE *rp = &response;
59 /* the rest of msg was set up in get_names */
61 /* copy new style sockaddr to old, swap family (short in old) */
62 msg.ctl_addr = *(struct osockaddr *)&ctl_addr;
63 msg.ctl_addr.sa_family = htons(ctl_addr.sin_family);
65 msg.ctl_addr = *(struct sockaddr *)&ctl_addr;
67 /* must be initiating a talk */
68 if (!look_for_invite(rp))
71 * There was an invitation waiting for us,
72 * so connect with the other (hopefully waiting) party
74 current_state = "Waiting to connect with caller";
76 if (rp->addr.sa_family != AF_INET)
77 p_error("Response uses invalid network address");
78 (void)memcpy(&addr, &rp->addr.sa_family, sizeof(addr));
79 addr.sa_family = rp->addr.sa_family;
80 addr.sa_len = sizeof(addr);
82 if (connect(sockt, &addr, sizeof(addr)) != -1)
84 } while (errno == EINTR);
85 if (errno == ECONNREFUSED) {
87 * The caller gave up, but his invitation somehow
88 * was not cleared. Clear it and initiate an
89 * invitation. (We know there are no newer invitations,
90 * the talkd works LIFO.)
92 ctl_transact(his_machine_addr, msg, DELETE, rp);
97 p_error("Unable to connect with initiator");
103 * Look for an invitation on 'machine'
106 look_for_invite(CTL_RESPONSE *rp)
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 */