contrib/ntpd/config.c

   1 /*      $OpenBSD: src/usr.sbin/ntpd/config.c,v 1.17 2005/03/09 20:31:11 henning Exp $ */
   2
   3 /*
   4  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20 #include <sys/socket.h>
  21 #include <sys/stat.h>
  22
  23 #include <netinet/in.h>
  24 #include <arpa/nameser.h>
  25
  26 #include <errno.h>
  27 #include <resolv.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31
  32 #include "ntpd.h"
  33
  34 struct ntp_addr *host_v4(const char *);
  35 struct ntp_addr *host_v6(const char *);
  36
  37 static u_int32_t                 maxid = 0;
  38
  39 int
  40 host(const char *s, struct ntp_addr **hn)
  41 {
  42         struct ntp_addr *h = NULL;
  43
  44         if (!strcmp(s, "*"))
  45                 if ((h = calloc(1, sizeof(struct ntp_addr))) == NULL)
  46                         fatal(NULL);
  47
  48         /* IPv4 address? */
  49         if (h == NULL)
  50                 h = host_v4(s);
  51
  52         /* IPv6 address? */
  53         if (h == NULL)
  54                 h = host_v6(s);
  55
  56         *hn = h;
  57         if (h == NULL)
  58                 return (0);
  59         return (1);
  60 }
  61
  62 struct ntp_addr *
  63 host_v4(const char *s)
  64 {
  65         struct in_addr           ina;
  66         struct sockaddr_in      *sa_in;
  67         struct ntp_addr         *h;
  68
  69         bzero(&ina, sizeof(struct in_addr));
  70         if (inet_pton(AF_INET, s, &ina) != 1)
  71                 return (NULL);
  72
  73         if ((h = calloc(1, sizeof(struct ntp_addr))) == NULL)
  74                 fatal(NULL);
  75         sa_in = (struct sockaddr_in *)&h->ss;
  76         sa_in->sin_len = sizeof(struct sockaddr_in);
  77         sa_in->sin_family = AF_INET;
  78         sa_in->sin_addr.s_addr = ina.s_addr;
  79
  80         return (h);
  81 }
  82
  83 struct ntp_addr *
  84 host_v6(const char *s)
  85 {
  86         struct addrinfo          hints, *res;
  87         struct sockaddr_in6     *sa_in6;
  88         struct ntp_addr         *h = NULL;
  89
  90         bzero(&hints, sizeof(hints));
  91         hints.ai_family = AF_INET6;
  92         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
  93         hints.ai_flags = AI_NUMERICHOST;
  94         if (getaddrinfo(s, "0", &hints, &res) == 0) {
  95                 if ((h = calloc(1, sizeof(struct ntp_addr))) == NULL)
  96                         fatal(NULL);
  97                 sa_in6 = (struct sockaddr_in6 *)&h->ss;
  98                 sa_in6->sin6_len = sizeof(struct sockaddr_in6);
  99                 sa_in6->sin6_family = AF_INET6;
 100                 memcpy(&sa_in6->sin6_addr,
 101                     &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
 102                     sizeof(sa_in6->sin6_addr));
 103                 sa_in6->sin6_scope_id =
 104                     ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
 105
 106                 freeaddrinfo(res);
 107         }
 108
 109         return (h);
 110 }
 111
 112 int
 113 host_dns(const char *s, struct ntp_addr **hn)
 114 {
 115         struct addrinfo          hints, *res0, *res;
 116         int                      error, cnt = 0;
 117         struct sockaddr_in      *sa_in;
 118         struct sockaddr_in6     *sa_in6;
 119         struct ntp_addr         *h, *hh = NULL;
 120
 121         bzero(&hints, sizeof(hints));
 122         hints.ai_family = PF_UNSPEC;
 123         hints.ai_socktype = SOCK_DGRAM; /* DUMMY */
 124         error = getaddrinfo(s, NULL, &hints, &res0);
 125         if (error == EAI_AGAIN || error == EAI_NODATA || error == EAI_NONAME)
 126                         return (0);
 127         if (error) {
 128                 log_warnx("could not parse \"%s\": %s", s,
 129                     gai_strerror(error));
 130                 return (-1);
 131         }
 132
 133         for (res = res0; res && cnt < MAX_SERVERS_DNS; res = res->ai_next) {
 134                 if (res->ai_family != AF_INET &&
 135                     res->ai_family != AF_INET6)
 136                         continue;
 137                 if ((h = calloc(1, sizeof(struct ntp_addr))) == NULL)
 138                         fatal(NULL);
 139                 h->ss.ss_family = res->ai_family;
 140                 if (res->ai_family == AF_INET) {
 141                         sa_in = (struct sockaddr_in *)&h->ss;
 142                         sa_in->sin_len = sizeof(struct sockaddr_in);
 143                         sa_in->sin_addr.s_addr = ((struct sockaddr_in *)
 144                             res->ai_addr)->sin_addr.s_addr;
 145                 } else {
 146                         sa_in6 = (struct sockaddr_in6 *)&h->ss;
 147                         sa_in6->sin6_len = sizeof(struct sockaddr_in6);
 148                         memcpy(&sa_in6->sin6_addr, &((struct sockaddr_in6 *)
 149                             res->ai_addr)->sin6_addr, sizeof(struct in6_addr));
 150                 }
 151
 152                 h->next = hh;
 153                 hh = h;
 154                 cnt++;
 155         }
 156         freeaddrinfo(res0);
 157
 158         *hn = hh;
 159         return (cnt);
 160 }
 161
 162 struct ntp_peer *
 163 new_peer(void)
 164 {
 165         struct ntp_peer *p;
 166
 167         if ((p = calloc(1, sizeof(struct ntp_peer))) == NULL)
 168                 fatal("conf_main server calloc");
 169         p->id = ++maxid;
 170
 171         return (p);
 172 }