2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
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34 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char sccsid[] = "@(#)look_up.c 8.1 (Berkeley) 6/6/93";
42 #include <sys/types.h>
43 #include <sys/socket.h>
44 #include <protocols/talkd.h>
54 * See if the local daemon has an invitation for us.
59 CTL_RESPONSE response;
60 CTL_RESPONSE *rp = &response;
63 /* the rest of msg was set up in get_names */
65 /* copy new style sockaddr to old, swap family (short in old) */
66 msg.ctl_addr = *(struct osockaddr *)&ctl_addr;
67 msg.ctl_addr.sa_family = htons(ctl_addr.sin_family);
69 msg.ctl_addr = *(struct sockaddr *)&ctl_addr;
71 /* must be initiating a talk */
72 if (!look_for_invite(rp))
75 * There was an invitation waiting for us,
76 * so connect with the other (hopefully waiting) party
78 current_state = "Waiting to connect with caller";
80 if (rp->addr.sa_family != AF_INET)
81 p_error("Response uses invalid network address");
82 (void)memcpy(&addr, &rp->addr.sa_family, sizeof(addr));
83 addr.sa_family = rp->addr.sa_family;
84 addr.sa_len = sizeof(addr);
86 if (connect(sockt, &addr, sizeof(addr)) != -1)
88 } while (errno == EINTR);
89 if (errno == ECONNREFUSED) {
91 * The caller gave up, but his invitation somehow
92 * was not cleared. Clear it and initiate an
93 * invitation. (We know there are no newer invitations,
94 * the talkd works LIFO.)
96 ctl_transact(his_machine_addr, msg, DELETE, rp);
101 p_error("Unable to connect with initiator");
107 * Look for an invitation on 'machine'
110 look_for_invite(CTL_RESPONSE *rp)
112 current_state = "Checking for invitation on caller's machine";
113 ctl_transact(his_machine_addr, msg, LOOK_UP, rp);
114 /* the switch is for later options, such as multiple invitations */
115 switch (rp->answer) {
118 msg.id_num = htonl(rp->id_num);
122 /* there wasn't an invitation waiting for us */