File: | src/usr.bin/talk/ctl_transact.c |
Warning: | line 82, column 19 The left operand of '==' is a garbage value |
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1 | /* $OpenBSD: ctl_transact.c,v 1.13 2016/02/01 07:29:25 mestre Exp $ */ | |||
2 | /* $NetBSD: ctl_transact.c,v 1.3 1994/12/09 02:14:12 jtc Exp $ */ | |||
3 | ||||
4 | /* | |||
5 | * Copyright (c) 1983, 1993 | |||
6 | * The Regents of the University of California. All rights reserved. | |||
7 | * | |||
8 | * Redistribution and use in source and binary forms, with or without | |||
9 | * modification, are permitted provided that the following conditions | |||
10 | * are met: | |||
11 | * 1. Redistributions of source code must retain the above copyright | |||
12 | * notice, this list of conditions and the following disclaimer. | |||
13 | * 2. Redistributions in binary form must reproduce the above copyright | |||
14 | * notice, this list of conditions and the following disclaimer in the | |||
15 | * documentation and/or other materials provided with the distribution. | |||
16 | * 3. Neither the name of the University nor the names of its contributors | |||
17 | * may be used to endorse or promote products derived from this software | |||
18 | * without specific prior written permission. | |||
19 | * | |||
20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |||
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||
22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |||
24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||
26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||
28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||
29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
30 | * SUCH DAMAGE. | |||
31 | */ | |||
32 | ||||
33 | #include <sys/socket.h> | |||
34 | #include <netinet/in.h> | |||
35 | ||||
36 | #include <errno(*__errno()).h> | |||
37 | #include <poll.h> | |||
38 | ||||
39 | #include "talk.h" | |||
40 | #include "talk_ctl.h" | |||
41 | ||||
42 | #define CTL_WAIT2 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 received an acknowledgement within a reasonable amount | |||
47 | * of time | |||
48 | */ | |||
49 | void | |||
50 | ctl_transact(struct in_addr target, CTL_MSG msg, int type, CTL_RESPONSE *rp) | |||
51 | { | |||
52 | struct pollfd pfd[1]; | |||
53 | int nready, cc; | |||
| ||||
54 | ||||
55 | msg.type = type; | |||
56 | daemon_addr.sin_addr = target; | |||
57 | daemon_addr.sin_port = daemon_port; | |||
58 | pfd[0].fd = ctl_sockt; | |||
59 | pfd[0].events = POLLIN0x0001; | |||
60 | ||||
61 | /* | |||
62 | * Keep sending the message until a response of | |||
63 | * the proper type is obtained. | |||
64 | */ | |||
65 | do { | |||
66 | /* resend message until a response is obtained */ | |||
67 | do { | |||
68 | cc = sendto(ctl_sockt, (char *)&msg, sizeof (msg), 0, | |||
69 | (struct sockaddr *)&daemon_addr, | |||
70 | sizeof (daemon_addr)); | |||
71 | if (cc != sizeof (msg)) { | |||
72 | if (errno(*__errno()) == EINTR4) | |||
73 | continue; | |||
74 | quit("Error on write to talk daemon", 1); | |||
75 | } | |||
76 | nready = poll(pfd, 1, CTL_WAIT2 * 1000); | |||
77 | if (nready < 0) { | |||
78 | if (errno(*__errno()) == EINTR4) | |||
79 | continue; | |||
80 | quit("Error waiting for daemon response", 1); | |||
81 | } | |||
82 | } while (nready == 0); | |||
| ||||
83 | /* | |||
84 | * Keep reading while there are queued messages | |||
85 | * (this is not necessary, it just saves extra | |||
86 | * request/acknowledgements being sent) | |||
87 | */ | |||
88 | do { | |||
89 | cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0); | |||
90 | if (cc < 0) { | |||
91 | if (errno(*__errno()) == EINTR4) | |||
92 | continue; | |||
93 | quit("Error on read from talk daemon", 1); | |||
94 | } | |||
95 | nready = poll(pfd, 1, 0); | |||
96 | } while (nready > 0 && (rp->vers != TALK_VERSION1 || | |||
97 | rp->type != type)); | |||
98 | } while (rp->vers != TALK_VERSION1 || rp->type != type); | |||
99 | rp->id_num = ntohl(rp->id_num)(__uint32_t)(__builtin_constant_p(rp->id_num) ? (__uint32_t )(((__uint32_t)(rp->id_num) & 0xff) << 24 | ((__uint32_t )(rp->id_num) & 0xff00) << 8 | ((__uint32_t)(rp-> id_num) & 0xff0000) >> 8 | ((__uint32_t)(rp->id_num ) & 0xff000000) >> 24) : __swap32md(rp->id_num)); | |||
100 | } |