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/* $OpenBSD: ntp_msg.c,v 1.6 2004/08/30 11:50:56 deraadt 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(char *p, ssize_t len, struct ntp_msg *msg)
{
int auth, i;
if (len == NTP_MSGSIZE)
auth = 1;
else if (len == NTP_MSGSIZE_NOAUTH)
auth = 0;
else {
log_warnx("malformed packet received");
return (-1);
}
memcpy(&msg->status, p, sizeof(msg->status));
p += sizeof(msg->status);
memcpy(&msg->stratum, p, sizeof(msg->stratum));
p += sizeof(msg->stratum);
memcpy(&msg->ppoll, p, sizeof(msg->ppoll));
p += sizeof(msg->ppoll);
memcpy(&msg->precision, p, sizeof(msg->precision));
p += sizeof(msg->precision);
memcpy(&msg->distance.int_part, p, sizeof(msg->distance.int_part));
p += sizeof(msg->distance.int_part);
memcpy(&msg->distance.fraction, p, sizeof(msg->distance.fraction));
p += sizeof(msg->distance.fraction);
memcpy(&msg->dispersion.int_part, p, sizeof(msg->dispersion.int_part));
p += sizeof(msg->dispersion.int_part);
memcpy(&msg->dispersion.fraction, p, sizeof(msg->dispersion.fraction));
p += sizeof(msg->dispersion.fraction);
memcpy(&msg->refid, p, sizeof(msg->refid));
p += sizeof(msg->refid);
memcpy(&msg->reftime.int_part, p, sizeof(msg->reftime.int_part));
p += sizeof(msg->reftime.int_part);
memcpy(&msg->reftime.fraction, p, sizeof(msg->reftime.fraction));
p += sizeof(msg->reftime.fraction);
memcpy(&msg->orgtime.int_part, p, sizeof(msg->orgtime.int_part));
p += sizeof(msg->orgtime.int_part);
memcpy(&msg->orgtime.fraction, p, sizeof(msg->orgtime.fraction));
p += sizeof(msg->orgtime.fraction);
memcpy(&msg->rectime.int_part, p, sizeof(msg->rectime.int_part));
p += sizeof(msg->rectime.int_part);
memcpy(&msg->rectime.fraction, p, sizeof(msg->rectime.fraction));
p += sizeof(msg->rectime.fraction);
memcpy(&msg->xmttime.int_part, p, sizeof(msg->xmttime.int_part));
p += sizeof(msg->xmttime.int_part);
memcpy(&msg->xmttime.fraction, p, sizeof(msg->xmttime.fraction));
p += sizeof(msg->xmttime.fraction);
if (auth) {
memcpy(&msg->keyid, p, sizeof(msg->keyid));
p += sizeof(msg->keyid);
for (i = 0; i < NTP_DIGESTSIZE; i++) {
memcpy(&msg->digest[i], p, sizeof(msg->digest[i]));
p += sizeof(msg->digest[i]);
}
/* XXX check auth */
}
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;
p = buf;
memcpy(p, &msg->status, sizeof(msg->status));
p += sizeof(msg->status);
memcpy(p, &msg->stratum, sizeof(msg->stratum));
p += sizeof(msg->stratum);
memcpy(p, &msg->ppoll, sizeof(msg->ppoll));
p += sizeof(msg->ppoll);
memcpy(p, &msg->precision, sizeof(msg->precision));
p += sizeof(msg->precision);
memcpy(p, &msg->distance.int_part, sizeof(msg->distance.int_part));
p += sizeof(msg->distance.int_part);
memcpy(p, &msg->distance.fraction, sizeof(msg->distance.fraction));
p += sizeof(msg->distance.fraction);
memcpy(p, &msg->dispersion.int_part, sizeof(msg->dispersion.int_part));
p += sizeof(msg->dispersion.int_part);
memcpy(p, &msg->dispersion.fraction, sizeof(msg->dispersion.fraction));
p += sizeof(msg->dispersion.fraction);
memcpy(p, &msg->refid, sizeof(msg->refid));
p += sizeof(msg->refid);
memcpy(p, &msg->reftime.int_part, sizeof(msg->reftime.int_part));
p += sizeof(msg->reftime.int_part);
memcpy(p, &msg->reftime.fraction, sizeof(msg->reftime.fraction));
p += sizeof(msg->reftime.fraction);
memcpy(p, &msg->orgtime.int_part, sizeof(msg->orgtime.int_part));
p += sizeof(msg->orgtime.int_part);
memcpy(p, &msg->orgtime.fraction, sizeof(msg->orgtime.fraction));
p += sizeof(msg->orgtime.fraction);
memcpy(p, &msg->rectime.int_part, sizeof(msg->rectime.int_part));
p += sizeof(msg->rectime.int_part);
memcpy(p, &msg->rectime.fraction, sizeof(msg->rectime.fraction));
p += sizeof(msg->rectime.fraction);
memcpy(p, &msg->xmttime.int_part, sizeof(msg->xmttime.int_part));
p += sizeof(msg->xmttime.int_part);
memcpy(p, &msg->xmttime.fraction, sizeof(msg->xmttime.fraction));
p += sizeof(msg->xmttime.fraction);
if (auth) {
/* XXX */
}
if (sendto(fd, &buf, len, 0, sa, SA_LEN(sa)) != 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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