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
16 * California, Berkeley and its contributors.
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18 * may be used to endorse or promote products derived from this software
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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>
53 * See if the local daemon has an invitation for us.
58 CTL_RESPONSE response;
59 CTL_RESPONSE *rp = &response;
62 /* the rest of msg was set up in get_names */
64 /* copy new style sockaddr to old, swap family (short in old) */
65 msg.ctl_addr = *(struct osockaddr *)&ctl_addr;
66 msg.ctl_addr.sa_family = htons(ctl_addr.sin_family);
68 msg.ctl_addr = *(struct sockaddr *)&ctl_addr;
70 /* must be initiating a talk */
71 if (!look_for_invite(rp))
74 * There was an invitation waiting for us,
75 * so connect with the other (hopefully waiting) party
77 current_state = "Waiting to connect with caller";
79 if (rp->addr.sa_family != AF_INET)
80 p_error("Response uses invalid network address");
81 (void)memcpy(&addr, &rp->addr.sa_family, sizeof(addr));
82 addr.sa_family = rp->addr.sa_family;
83 addr.sa_len = sizeof(addr);
85 if (connect(sockt, &addr, sizeof(addr)) != -1)
87 } while (errno == EINTR);
88 if (errno == ECONNREFUSED) {
90 * The caller gave up, but his invitation somehow
91 * was not cleared. Clear it and initiate an
92 * invitation. (We know there are no newer invitations,
93 * the talkd works LIFO.)
95 ctl_transact(his_machine_addr, msg, DELETE, rp);
100 p_error("Unable to connect with initiator");
106 * Look for an invitation on 'machine'
109 look_for_invite(CTL_RESPONSE *rp)
111 current_state = "Checking for invitation on caller's machine";
112 ctl_transact(his_machine_addr, msg, LOOK_UP, rp);
113 /* the switch is for later options, such as multiple invitations */
114 switch (rp->answer) {
117 msg.id_num = htonl(rp->id_num);
121 /* there wasn't an invitation waiting for us */