decodenetnum.c revision 182007 
1/*
2 * decodenetnum - return a net number (this is crude, but careful)
3 */
4#include <sys/types.h>
5#include <ctype.h>
6#include <sys/socket.h>
7#include <netinet/in.h>
8
9#include "ntp_stdlib.h"
10
11int
12decodenetnum(
13	const char *num,
14	struct sockaddr_storage *netnum
15	)
16{
17	struct addrinfo hints, *ai = NULL;
18	register int err, i;
19	register const char *cp;
20	char name[80];
21
22	cp = num;
23
24	if (*cp == '[') {
25		cp++;
26		for (i = 0; *cp != ']'; cp++, i++)
27			name[i] = *cp;
28	name[i] = '\0';
29	num = name;
30	}
31	memset(&hints, 0, sizeof(struct addrinfo));
32	hints.ai_flags = AI_NUMERICHOST;
33	err = getaddrinfo(num, NULL, &hints, &ai);
34	if (err != 0)
35		return 0;
36	memcpy(netnum, (struct sockaddr_storage *)ai->ai_addr, ai->ai_addrlen);
37	freeaddrinfo(ai);
38	return 1;
39}
40