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/* $OpenBSD: ntp_msg.c,v 1.14 2004/12/14 06:27:13 dtucker 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 MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/param.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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#include "ntp.h"
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int
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ntp_getmsg(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_warnx("malformed packet received");
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return (-1);
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}
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#define copyin(f,p) memcpy(&(f), (p), sizeof(f)); (p) += sizeof(f)
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copyin(msg->status, p);
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copyin(msg->stratum, p);
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copyin(msg->ppoll, p);
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copyin(msg->precision, p);
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copyin(msg->rootdelay.int_parts, p);
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copyin(msg->rootdelay.fractions, p);
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copyin(msg->dispersion.int_parts, p);
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copyin(msg->dispersion.fractions, p);
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copyin(msg->refid, p);
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copyin(msg->reftime.int_partl, p);
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copyin(msg->reftime.fractionl, p);
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copyin(msg->orgtime.int_partl, p);
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copyin(msg->orgtime.fractionl, p);
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copyin(msg->rectime.int_partl, p);
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copyin(msg->rectime.fractionl, p);
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copyin(msg->xmttime.int_partl, p);
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copyin(msg->xmttime.fractionl, p);
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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, ssize_t len,
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int auth)
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{
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char buf[NTP_MSGSIZE];
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char *p = buf;
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socklen_t sa_len;
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#define copyout(p,f) memcpy((p), &(f), sizeof(f)); p += sizeof(f)
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copyout(p, msg->status);
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copyout(p, msg->stratum);
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copyout(p, msg->ppoll);
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copyout(p, msg->precision);
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copyout(p, msg->rootdelay.int_parts);
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copyout(p, msg->rootdelay.fractions);
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copyout(p, msg->dispersion.int_parts);
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copyout(p, msg->dispersion.fractions);
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copyout(p, msg->refid);
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copyout(p, msg->reftime.int_partl);
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copyout(p, msg->reftime.fractionl);
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copyout(p, msg->orgtime.int_partl);
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copyout(p, msg->orgtime.fractionl);
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copyout(p, msg->rectime.int_partl);
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copyout(p, msg->rectime.fractionl);
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copyout(p, msg->xmttime.int_partl);
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copyout(p, msg->xmttime.fractionl);
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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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if (sendto(fd, &buf, len, 0, sa, sa_len) != len) {
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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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return (0);
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}
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