dist/ntp/libntp/decodenetnum.c

   1 /*      $NetBSD: decodenetnum.c,v 1.2 2003/12/04 16:23:36 drochner Exp $        */
   2
   3 /*
   4  * decodenetnum - return a net number (this is crude, but careful)
   5  */
   6 #include <sys/types.h>
   7 #include <ctype.h>
   8 #include <sys/socket.h>
   9 #include <netinet/in.h>
  10
  11 #include "ntp_stdlib.h"
  12
  13 int
  14 decodenetnum(
  15         const char *num,
  16         struct sockaddr_storage *netnum
  17         )
  18 {
  19         struct addrinfo hints, *ai = NULL;
  20         register int err, i;
  21         register const char *cp;
  22         char name[80];
  23
  24         cp = num;
  25
  26         if (*cp == '[') {
  27                 cp++;
  28                 for (i = 0; *cp != ']'; cp++, i++)
  29                         name[i] = *cp;
  30         name[i] = '\0';
  31         num = name;
  32         }
  33         memset(&hints, 0, sizeof(struct addrinfo));
  34         hints.ai_flags = AI_NUMERICHOST;
  35         err = getaddrinfo(num, NULL, &hints, &ai);
  36         if (err != 0)
  37                 return 0;
  38         memcpy(netnum, (struct sockaddr_storage *)ai->ai_addr, ai->ai_addrlen);
  39         freeaddrinfo(ai);
  40         return 1;
  41 }