talk(1): Raise WARNS to 6 and fix warnings.
[dragonfly.git] / usr.bin / talk / ctl_transact.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
1de703da
MD
32 *
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 $
984263bc
MD
35 */
36
984263bc
MD
37#include <errno.h>
38#include <string.h>
39#include "talk.h"
40#include "talk_ctl.h"
41
42#define CTL_WAIT 2 /* time to wait for a response, in seconds */
43
44/*
45 * SOCKDGRAM is unreliable, so we must repeat messages if we have
46 * not recieved an acknowledgement within a reasonable amount
47 * of time
48 */
49void
e2daa382 50ctl_transact(struct in_addr target, CTL_MSG lmsg, int type, CTL_RESPONSE *rp)
984263bc
MD
51{
52 fd_set read_mask, ctl_mask;
53 int nready = 0, cc;
54 struct timeval wait;
55
e2daa382 56 lmsg.type = type;
984263bc
MD
57 daemon_addr.sin_addr = target;
58 daemon_addr.sin_port = daemon_port;
59 FD_ZERO(&ctl_mask);
60 FD_SET(ctl_sockt, &ctl_mask);
61
62 /*
63 * Keep sending the message until a response of
64 * the proper type is obtained.
65 */
66 do {
67 wait.tv_sec = CTL_WAIT;
68 wait.tv_usec = 0;
69 /* resend message until a response is obtained */
70 do {
e2daa382 71 cc = sendto(ctl_sockt, (char *)&lmsg, sizeof (lmsg), 0,
984263bc
MD
72 (struct sockaddr *)&daemon_addr,
73 sizeof (daemon_addr));
e2daa382 74 if (cc != sizeof (lmsg)) {
984263bc
MD
75 if (errno == EINTR)
76 continue;
77 p_error("Error on write to talk daemon");
78 }
79 read_mask = ctl_mask;
80 nready = select(32, &read_mask, 0, 0, &wait);
81 if (nready < 0) {
82 if (errno == EINTR)
83 continue;
84 p_error("Error waiting for daemon response");
85 }
86 } while (nready == 0);
87 /*
88 * Keep reading while there are queued messages
89 * (this is not necessary, it just saves extra
90 * request/acknowledgements being sent)
91 */
92 do {
93 cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0);
94 if (cc < 0) {
95 if (errno == EINTR)
96 continue;
97 p_error("Error on read from talk daemon");
98 }
99 read_mask = ctl_mask;
100 /* an immediate poll */
101 timerclear(&wait);
102 nready = select(32, &read_mask, 0, 0, &wait);
103 } while (nready > 0 && (rp->vers != TALK_VERSION ||
104 rp->type != type));
105 } while (rp->vers != TALK_VERSION || rp->type != type);
106 rp->id_num = ntohl(rp->id_num);
107 rp->addr.sa_family = ntohs(rp->addr.sa_family);
108}