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
34 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 static const char sccsid[] = "@(#)ctl_transact.c 8.1 (Berkeley) 6/6/93";
42 #include <arpa/inet.h>
49 #define CTL_WAIT 2 /* time to wait for a response, in seconds */
52 * SOCKDGRAM is unreliable, so we must repeat messages if we have
53 * not recieved an acknowledgement within a reasonable amount
57 ctl_transact(struct in_addr target, CTL_MSG lmsg, int type, CTL_RESPONSE *rp)
59 fd_set read_mask, ctl_mask;
64 daemon_addr.sin_addr = target;
65 daemon_addr.sin_port = daemon_port;
67 FD_SET(ctl_sockt, &ctl_mask);
70 * Keep sending the message until a response of
71 * the proper type is obtained.
74 wait.tv_sec = CTL_WAIT;
76 /* resend message until a response is obtained */
78 cc = sendto(ctl_sockt, (char *)&lmsg, sizeof (lmsg), 0,
79 (struct sockaddr *)&daemon_addr,
80 sizeof (daemon_addr));
81 if (cc != sizeof (lmsg)) {
84 p_error("Error on write to talk daemon");
87 nready = select(32, &read_mask, 0, 0, &wait);
91 p_error("Error waiting for daemon response");
93 } while (nready == 0);
95 * Keep reading while there are queued messages
96 * (this is not necessary, it just saves extra
97 * request/acknowledgements being sent)
100 cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0);
104 p_error("Error on read from talk daemon");
106 read_mask = ctl_mask;
107 /* an immediate poll */
109 nready = select(32, &read_mask, 0, 0, &wait);
110 } while (nready > 0 && (rp->vers != TALK_VERSION ||
112 } while (rp->vers != TALK_VERSION || rp->type != type);
113 rp->id_num = ntohl(rp->id_num);
114 rp->addr.sa_family = ntohs(rp->addr.sa_family);