|
|
/* $OpenBSD: server.c,v 1.12 2004/07/18 13:26:53 henning Exp $ */
|
|
|
|
|
|
/*
|
|
|
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
|
|
|
* Copyright (c) 2004 Alexander Guy <alexander@openbsd.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/types.h>
|
|
|
#include <sys/socket.h>
|
|
|
#include <errno.h>
|
|
|
#include <ifaddrs.h>
|
|
|
#include <stdlib.h>
|
|
|
#include <string.h>
|
|
|
#include <unistd.h>
|
|
|
|
|
|
#include "ntpd.h"
|
|
|
#include "ntp.h"
|
|
|
|
|
|
int
|
|
|
setup_listeners(struct servent *se, struct ntpd_conf *conf, u_int *cnt)
|
|
|
{
|
|
|
struct listen_addr *la;
|
|
|
struct ifaddrs *ifap;
|
|
|
struct sockaddr *sa;
|
|
|
u_int new_cnt = 0;
|
|
|
|
|
|
if (conf->listen_all) {
|
|
|
if (getifaddrs(&ifap) == -1)
|
|
|
fatal("getifaddrs");
|
|
|
|
|
|
for (; ifap != NULL; ifap = ifap->ifa_next) {
|
|
|
sa = ifap->ifa_addr;
|
|
|
|
|
|
if (sa->sa_family != AF_INET &&
|
|
|
sa->sa_family != AF_INET6)
|
|
|
continue;
|
|
|
|
|
|
if ((la = calloc(1, sizeof(struct listen_addr))) ==
|
|
|
NULL)
|
|
|
fatal("setup_listeners calloc");
|
|
|
|
|
|
memcpy(&la->sa, sa, SA_LEN(sa));
|
|
|
TAILQ_INSERT_TAIL(&conf->listen_addrs, la, entry);
|
|
|
}
|
|
|
|
|
|
freeifaddrs(ifap);
|
|
|
}
|
|
|
|
|
|
TAILQ_FOREACH(la, &conf->listen_addrs, entry) {
|
|
|
new_cnt++;
|
|
|
|
|
|
switch (la->sa.ss_family) {
|
|
|
case AF_INET:
|
|
|
if (((struct sockaddr_in *)&la->sa)->sin_port == 0)
|
|
|
((struct sockaddr_in *)&la->sa)->sin_port =
|
|
|
se->s_port;
|
|
|
break;
|
|
|
case AF_INET6:
|
|
|
if (((struct sockaddr_in6 *)&la->sa)->sin6_port == 0)
|
|
|
((struct sockaddr_in6 *)&la->sa)->sin6_port =
|
|
|
se->s_port;
|
|
|
break;
|
|
|
default:
|
|
|
fatalx("king bula sez: af borked");
|
|
|
}
|
|
|
|
|
|
log_info("listening on %s",
|
|
|
log_sockaddr((struct sockaddr *)&la->sa));
|
|
|
|
|
|
if ((la->fd = socket(la->sa.ss_family, SOCK_DGRAM, 0)) == -1)
|
|
|
fatal("socket");
|
|
|
|
|
|
if (bind(la->fd, (struct sockaddr *)&la->sa,
|
|
|
SA_LEN((struct sockaddr *)&la->sa)) == -1)
|
|
|
fatal("bind");
|
|
|
}
|
|
|
|
|
|
*cnt = new_cnt;
|
|
|
|
|
|
return (0);
|
|
|
}
|
|
|
|
|
|
int
|
|
|
server_dispatch(int fd, struct ntpd_conf *conf)
|
|
|
{
|
|
|
ssize_t size;
|
|
|
u_int8_t version;
|
|
|
double rectime;
|
|
|
struct sockaddr_storage fsa;
|
|
|
socklen_t fsa_len;
|
|
|
struct ntp_msg query, reply;
|
|
|
char buf[NTP_MSGSIZE];
|
|
|
|
|
|
fsa_len = sizeof(fsa);
|
|
|
if ((size = recvfrom(fd, &buf, sizeof(buf), 0,
|
|
|
(struct sockaddr *)&fsa, &fsa_len)) == -1) {
|
|
|
if (errno == EHOSTUNREACH || errno == EHOSTDOWN ||
|
|
|
errno == ENETDOWN) {
|
|
|
log_warn("recvfrom %s",
|
|
|
log_sockaddr((struct sockaddr *)&fsa));
|
|
|
return (0);
|
|
|
} else
|
|
|
fatal("recvfrom");
|
|
|
}
|
|
|
|
|
|
rectime = gettime();
|
|
|
|
|
|
if (ntp_getmsg(buf, size, &query) == -1)
|
|
|
return (0);
|
|
|
|
|
|
version = (query.status & VERSIONMASK) >> 3;
|
|
|
|
|
|
bzero(&reply, sizeof(reply));
|
|
|
reply.status = conf->status.leap | (query.status & VERSIONMASK);
|
|
|
if ((query.status & MODEMASK) == MODE_CLIENT)
|
|
|
reply.status |= MODE_SERVER;
|
|
|
else
|
|
|
reply.status |= MODE_SYM_PAS;
|
|
|
|
|
|
reply.stratum = 2;
|
|
|
reply.ppoll = query.ppoll;
|
|
|
reply.precision = conf->status.precision;
|
|
|
reply.rectime = d_to_lfp(rectime);
|
|
|
reply.reftime = d_to_lfp(conf->status.reftime);
|
|
|
reply.xmttime = d_to_lfp(gettime());
|
|
|
reply.orgtime = query.xmttime;
|
|
|
|
|
|
if (version > 3)
|
|
|
reply.refid = reply.xmttime.fraction;
|
|
|
else
|
|
|
reply.refid = 0; /* XXX */
|
|
|
|
|
|
return (ntp_sendmsg(fd, (struct sockaddr *)&fsa, &reply, size, 0));
|
|
|
}
|