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
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
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.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)ctl_transact.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/talk/ctl_transact.c,v 1.5 1999/08/28 01:06:11 peter Exp $
35 * $DragonFly: src/usr.bin/talk/ctl_transact.c,v 1.3 2003/10/04 20:36:52 hmp Exp $
43 #define CTL_WAIT 2 /* time to wait for a response, in seconds */
46 * SOCKDGRAM is unreliable, so we must repeat messages if we have
47 * not recieved an acknowledgement within a reasonable amount
51 ctl_transact(struct in_addr target, CTL_MSG msg, int type, CTL_RESPONSE *rp)
53 fd_set read_mask, ctl_mask;
58 daemon_addr.sin_addr = target;
59 daemon_addr.sin_port = daemon_port;
61 FD_SET(ctl_sockt, &ctl_mask);
64 * Keep sending the message until a response of
65 * the proper type is obtained.
68 wait.tv_sec = CTL_WAIT;
70 /* resend message until a response is obtained */
72 cc = sendto(ctl_sockt, (char *)&msg, sizeof (msg), 0,
73 (struct sockaddr *)&daemon_addr,
74 sizeof (daemon_addr));
75 if (cc != sizeof (msg)) {
78 p_error("Error on write to talk daemon");
81 nready = select(32, &read_mask, 0, 0, &wait);
85 p_error("Error waiting for daemon response");
87 } while (nready == 0);
89 * Keep reading while there are queued messages
90 * (this is not necessary, it just saves extra
91 * request/acknowledgements being sent)
94 cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0);
98 p_error("Error on read from talk daemon");
100 read_mask = ctl_mask;
101 /* an immediate poll */
103 nready = select(32, &read_mask, 0, 0, &wait);
104 } while (nready > 0 && (rp->vers != TALK_VERSION ||
106 } while (rp->vers != TALK_VERSION || rp->type != type);
107 rp->id_num = ntohl(rp->id_num);
108 rp->addr.sa_family = ntohs(rp->addr.sa_family);