1/*
2 * IP address processing
3 * Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "ip_addr.h"
13
14const char * hostapd_ip_txt(const struct hostapd_ip_addr *addr, char *buf,
15			    size_t buflen)
16{
17	if (buflen == 0 || addr == NULL)
18		return NULL;
19
20	if (addr->af == AF_INET) {
21		os_strlcpy(buf, inet_ntoa(addr->u.v4), buflen);
22	} else {
23		buf[0] = '\0';
24	}
25#ifdef CONFIG_IPV6
26	if (addr->af == AF_INET6) {
27		if (inet_ntop(AF_INET6, &addr->u.v6, buf, buflen) == NULL)
28			buf[0] = '\0';
29	}
30#endif /* CONFIG_IPV6 */
31
32	return buf;
33}
34
35
36int hostapd_ip_diff(struct hostapd_ip_addr *a, struct hostapd_ip_addr *b)
37{
38	if (a == NULL && b == NULL)
39		return 0;
40	if (a == NULL || b == NULL)
41		return 1;
42
43	switch (a->af) {
44	case AF_INET:
45		if (a->u.v4.s_addr != b->u.v4.s_addr)
46			return 1;
47		break;
48#ifdef CONFIG_IPV6
49	case AF_INET6:
50		if (os_memcmp(&a->u.v6, &b->u.v6, sizeof(a->u.v6)) != 0)
51			return 1;
52		break;
53#endif /* CONFIG_IPV6 */
54	}
55
56	return 0;
57}
58
59
60int hostapd_parse_ip_addr(const char *txt, struct hostapd_ip_addr *addr)
61{
62#ifndef CONFIG_NATIVE_WINDOWS
63	if (inet_aton(txt, &addr->u.v4)) {
64		addr->af = AF_INET;
65		return 0;
66	}
67
68#ifdef CONFIG_IPV6
69	if (inet_pton(AF_INET6, txt, &addr->u.v6) > 0) {
70		addr->af = AF_INET6;
71		return 0;
72	}
73#endif /* CONFIG_IPV6 */
74#endif /* CONFIG_NATIVE_WINDOWS */
75
76	return -1;
77}
78