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/* $OpenBSD: ntp_msg.c,v 1.22 2016/09/03 11:52:06 reyk Exp $ */ |
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/* |
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> |
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* Copyright (c) 2004 Alexander Guy <alexander.guy@andern.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <errno.h> |
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#include "ntpd.h" |
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int |
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ntp_getmsg(struct sockaddr *sa, char *p, ssize_t len, struct ntp_msg *msg) |
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{ |
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if (len != NTP_MSGSIZE_NOAUTH && len != NTP_MSGSIZE) { |
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log_debug("malformed packet received from %s", |
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log_sockaddr(sa)); |
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return (-1); |
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} |
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memcpy(msg, p, sizeof(*msg)); |
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return (0); |
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} |
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int |
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ntp_sendmsg(int fd, struct sockaddr *sa, struct ntp_msg *msg) |
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{ |
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socklen_t sa_len; |
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ssize_t n; |
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if (sa != NULL) |
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sa_len = SA_LEN(sa); |
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else |
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sa_len = 0; |
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n = sendto(fd, msg, sizeof(*msg), 0, sa, sa_len); |
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if (n == -1) { |
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if (errno == ENOBUFS || errno == EHOSTUNREACH || |
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errno == ENETDOWN || errno == EHOSTDOWN) { |
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/* logging is futile */ |
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return (-1); |
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} |
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log_warn("sendto"); |
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return (-1); |
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} |
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if (n != sizeof(*msg)) { |
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log_warnx("ntp_sendmsg: only %zd of %zu bytes sent", n, |
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sizeof(*msg)); |
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return (-1); |
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} |
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return (0); |
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} |