inet6_ntop.c revision 261363 
1/*
2 * Copyright (c) 2013 Proofpoint, Inc. and its suppliers.
3 *      All rights reserved.
4 *
5 * By using this file, you agree to the terms and conditions set
6 * forth in the LICENSE file which can be found at the top level of
7 * the sendmail distribution.
8 *
9 */
10
11#include <sm/gen.h>
12SM_RCSID("@(#)$Id: inet6_ntop.c,v 1.2 2013/11/22 20:51:43 ca Exp $")
13
14#if NETINET6
15# include <sm/conf.h>
16# include <sm/types.h>
17# include <sm/io.h>
18# include <sm/string.h>
19# include <netinet/in.h>
20
21/*
22**  SM_INET6_NTOP -- convert IPv6 address to ASCII string (uncompressed)
23**
24**	Parameters:
25**		ipv6 -- IPv6 address
26**		dst -- ASCII representation of address (output)
27**		len -- length of dst
28**
29**	Returns:
30**		error: NULL
31*/
32
33char *
34sm_inet6_ntop(ipv6, dst, len)
35	const void *ipv6;
36	char *dst;
37	size_t len;
38{
39	SM_UINT16 *u16;
40	int r;
41
42	u16 = (SM_UINT16 *)ipv6;
43	r = sm_snprintf(dst, len,
44		"%x:%x:%x:%x:%x:%x:%x:%x"
45			, htons(u16[0])
46			, htons(u16[1])
47			, htons(u16[2])
48			, htons(u16[3])
49			, htons(u16[4])
50			, htons(u16[5])
51			, htons(u16[6])
52			, htons(u16[7])
53		);
54	if (r > 0)
55		return dst;
56	return NULL;
57}
58#endif /* NETINET6 */
59