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/* $OpenBSD: config.c,v 1.32 2019/07/07 07:14:57 otto Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@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 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 <sys/stat.h>
#include <netinet/in.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <resolv.h>
#include <unistd.h>
#include "ntpd.h"
struct ntp_addr *host_ip(const char *);
int host_dns1(const char *, struct ntp_addr **, int);
static u_int32_t maxid = 0;
static u_int32_t constraint_maxid = 0;
void
host(const char *s, struct ntp_addr **hn)
{
struct ntp_addr *h;
if (!strcmp(s, "*")) {
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(NULL);
} else {
if ((h = host_ip(s)) == NULL)
return;
}
*hn = h;
}
struct ntp_addr *
host_ip(const char *s)
{
struct addrinfo hints, *res;
struct ntp_addr *h = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM; /*dummy*/
hints.ai_flags = AI_NUMERICHOST;
if (getaddrinfo(s, "0", &hints, &res) == 0) {
if (res->ai_family == AF_INET ||
res->ai_family == AF_INET6) {
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(NULL);
memcpy(&h->ss, res->ai_addr, res->ai_addrlen);
}
freeaddrinfo(res);
}
return (h);
}
void
host_dns_free(struct ntp_addr *hn)
{
struct ntp_addr *h = hn, *tmp;
while (h) {
tmp = h;
h = h->next;
free(tmp);
}
}
int
host_dns1(const char *s, struct ntp_addr **hn, int notauth)
{
struct addrinfo hints, *res0, *res;
int error, cnt = 0;
struct ntp_addr *h, *hh = NULL;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM; /* DUMMY */
hints.ai_flags = AI_ADDRCONFIG;
error = getaddrinfo(s, NULL, &hints, &res0);
if (error == EAI_AGAIN || error == EAI_NODATA || error == EAI_NONAME)
return (0);
if (error) {
log_warnx("could not parse \"%s\": %s", s,
gai_strerror(error));
return (-1);
}
for (res = res0; res && cnt < MAX_SERVERS_DNS; res = res->ai_next) {
if (res->ai_family != AF_INET &&
res->ai_family != AF_INET6)
continue;
if ((h = calloc(1, sizeof(*h))) == NULL)
fatal(NULL);
memcpy(&h->ss, res->ai_addr, res->ai_addrlen);
h->notauth = notauth;
h->next = hh;
hh = h;
cnt++;
}
freeaddrinfo(res0);
*hn = hh;
return (cnt);
}
int
host_dns(const char *s, int synced, struct ntp_addr **hn)
{
int error, save_opts;
log_debug("trying to resolve %s", s);
error = host_dns1(s, hn, 0);
if (!synced && error <= 0) {
log_debug("no luck, trying to resolve %s without checking", s);
save_opts = _res.options;
_res.options |= RES_USE_CD;
error = host_dns1(s, hn, 1);
_res.options = save_opts;
}
log_debug("resolve %s done: %d", s, error);
return error;
}
struct ntp_peer *
new_peer(void)
{
struct ntp_peer *p;
if ((p = calloc(1, sizeof(struct ntp_peer))) == NULL)
fatal("new_peer calloc");
p->id = ++maxid;
return (p);
}
struct ntp_conf_sensor *
new_sensor(char *device)
{
struct ntp_conf_sensor *s;
if ((s = calloc(1, sizeof(struct ntp_conf_sensor))) == NULL)
fatal("new_sensor calloc");
if ((s->device = strdup(device)) == NULL)
fatal("new_sensor strdup");
return (s);
}
struct constraint *
new_constraint(void)
{
struct constraint *p;
if ((p = calloc(1, sizeof(struct constraint))) == NULL)
fatal("new_constraint calloc");
p->id = ++constraint_maxid;
p->fd = -1;
return (p);
}
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