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/* $OpenBSD: server.c,v 1.10 2004/07/13 19:41:26 alexander 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)
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 = conf->status.stratum;
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));
}
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