| 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 | } |