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/* $OpenBSD: config.c,v 1.30 2019/05/28 06:49:46 otto Exp $ */
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/*
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <resolv.h>
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#include <unistd.h>
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#include "ntpd.h"
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struct ntp_addr *host_ip(const char *);
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int host_dns1(const char *, struct ntp_addr **, int);
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static u_int32_t maxid = 0;
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static u_int32_t constraint_maxid = 0;
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void
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host(const char *s, struct ntp_addr **hn)
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{
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struct ntp_addr *h;
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if (!strcmp(s, "*")) {
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if ((h = calloc(1, sizeof(*h))) == NULL)
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fatal(NULL);
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} else {
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if ((h = host_ip(s)) == NULL)
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return;
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}
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*hn = h;
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}
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struct ntp_addr *
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host_ip(const char *s)
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{
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struct addrinfo hints, *res;
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struct ntp_addr *h = NULL;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_DGRAM; /*dummy*/
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hints.ai_flags = AI_NUMERICHOST;
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if (getaddrinfo(s, "0", &hints, &res) == 0) {
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if (res->ai_family == AF_INET ||
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res->ai_family == AF_INET6) {
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if ((h = calloc(1, sizeof(*h))) == NULL)
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fatal(NULL);
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memcpy(&h->ss, res->ai_addr, res->ai_addrlen);
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}
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freeaddrinfo(res);
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}
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return (h);
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}
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void
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host_dns_free(struct ntp_addr *hn)
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{
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struct ntp_addr *h = hn, *tmp;
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while (h) {
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tmp = h;
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h = h->next;
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free(tmp);
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}
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}
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int
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host_dns1(const char *s, struct ntp_addr **hn, int notauth)
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{
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struct addrinfo hints, *res0, *res;
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int error, cnt = 0;
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struct ntp_addr *h, *hh = NULL;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_DGRAM; /* DUMMY */
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/* ntpd MUST NOT use AI_ADDRCONFIG here */
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error = getaddrinfo(s, NULL, &hints, &res0);
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if (error == EAI_AGAIN || error == EAI_NODATA || error == EAI_NONAME)
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return (0);
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if (error) {
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log_warnx("could not parse \"%s\": %s", s,
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gai_strerror(error));
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return (-1);
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}
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for (res = res0; res && cnt < MAX_SERVERS_DNS; res = res->ai_next) {
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if (res->ai_family != AF_INET &&
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res->ai_family != AF_INET6)
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continue;
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if ((h = calloc(1, sizeof(*h))) == NULL)
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fatal(NULL);
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memcpy(&h->ss, res->ai_addr, res->ai_addrlen);
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h->notauth = notauth;
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h->next = hh;
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hh = h;
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cnt++;
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}
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freeaddrinfo(res0);
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*hn = hh;
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return (cnt);
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}
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int
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host_dns(const char *s, struct ntp_addr **hn)
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{
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int error, save_opts;
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log_debug("trying to resolve %s", s);
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error = host_dns1(s, hn, 0);
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if (error <= 0) {
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log_debug("no luck, trying to resolve %s without checking", s);
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save_opts = _res.options;
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_res.options |= RES_USE_CD;
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error = host_dns1(s, hn, 1);
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_res.options = save_opts;
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}
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log_debug("resolve %s done: %d", s, error);
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return error;
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}
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struct ntp_peer *
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new_peer(void)
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{
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struct ntp_peer *p;
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if ((p = calloc(1, sizeof(struct ntp_peer))) == NULL)
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fatal("new_peer calloc");
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p->id = ++maxid;
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return (p);
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}
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struct ntp_conf_sensor *
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new_sensor(char *device)
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{
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struct ntp_conf_sensor *s;
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if ((s = calloc(1, sizeof(struct ntp_conf_sensor))) == NULL)
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fatal("new_sensor calloc");
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if ((s->device = strdup(device)) == NULL)
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fatal("new_sensor strdup");
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return (s);
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}
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struct constraint *
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new_constraint(void)
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{
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struct constraint *p;
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if ((p = calloc(1, sizeof(struct constraint))) == NULL)
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fatal("new_constraint calloc");
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p->id = ++constraint_maxid;
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p->fd = -1;
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return (p);
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}
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