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/* $OpenBSD: ntp_msg.c,v 1.15 2005/09/24 00:32:03 dtucker Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2004 Alexander Guy <alexander.guy@andern.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "ntpd.h"
#include "ntp.h"
int
ntp_getmsg(struct sockaddr *sa, char *p, ssize_t len, struct ntp_msg *msg)
{
if (len != NTP_MSGSIZE_NOAUTH && len != NTP_MSGSIZE) {
log_warnx("malformed packet received from %s",
log_sockaddr(sa));
return (-1);
}
#define copyin(f,p) memcpy(&(f), (p), sizeof(f)); (p) += sizeof(f)
copyin(msg->status, p);
copyin(msg->stratum, p);
copyin(msg->ppoll, p);
copyin(msg->precision, p);
copyin(msg->rootdelay.int_parts, p);
copyin(msg->rootdelay.fractions, p);
copyin(msg->dispersion.int_parts, p);
copyin(msg->dispersion.fractions, p);
copyin(msg->refid, p);
copyin(msg->reftime.int_partl, p);
copyin(msg->reftime.fractionl, p);
copyin(msg->orgtime.int_partl, p);
copyin(msg->orgtime.fractionl, p);
copyin(msg->rectime.int_partl, p);
copyin(msg->rectime.fractionl, p);
copyin(msg->xmttime.int_partl, p);
copyin(msg->xmttime.fractionl, p);
return (0);
}
int
ntp_sendmsg(int fd, struct sockaddr *sa, struct ntp_msg *msg, ssize_t len,
int auth)
{
char buf[NTP_MSGSIZE];
char *p = buf;
socklen_t sa_len;
#define copyout(p,f) memcpy((p), &(f), sizeof(f)); p += sizeof(f)
copyout(p, msg->status);
copyout(p, msg->stratum);
copyout(p, msg->ppoll);
copyout(p, msg->precision);
copyout(p, msg->rootdelay.int_parts);
copyout(p, msg->rootdelay.fractions);
copyout(p, msg->dispersion.int_parts);
copyout(p, msg->dispersion.fractions);
copyout(p, msg->refid);
copyout(p, msg->reftime.int_partl);
copyout(p, msg->reftime.fractionl);
copyout(p, msg->orgtime.int_partl);
copyout(p, msg->orgtime.fractionl);
copyout(p, msg->rectime.int_partl);
copyout(p, msg->rectime.fractionl);
copyout(p, msg->xmttime.int_partl);
copyout(p, msg->xmttime.fractionl);
if (sa != NULL)
sa_len = SA_LEN(sa);
else
sa_len = 0;
if (sendto(fd, &buf, len, 0, sa, sa_len) != len) {
if (errno == ENOBUFS || errno == EHOSTUNREACH ||
errno == ENETDOWN || errno == EHOSTDOWN) {
/* logging is futile */
return (-1);
}
log_warn("sendto");
return (-1);
}
return (0);
}
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