hostap/src/utils/ip_addr.c

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/*
* IP address processing
* Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "ip_addr.h"
const char * hostapd_ip_txt(const struct hostapd_ip_addr *addr, char *buf,
size_t buflen)
{
if (buflen == 0 || addr == NULL)
return NULL;
if (addr->af == AF_INET) {
os_strlcpy(buf, inet_ntoa(addr->u.v4), buflen);
} else {
buf[0] = '\0';
}
#ifdef CONFIG_IPV6
if (addr->af == AF_INET6) {
if (inet_ntop(AF_INET6, &addr->u.v6, buf, buflen) == NULL)
buf[0] = '\0';
}
#endif /* CONFIG_IPV6 */
return buf;
}
int hostapd_ip_diff(struct hostapd_ip_addr *a, struct hostapd_ip_addr *b)
{
if (a == NULL && b == NULL)
return 0;
if (a == NULL || b == NULL)
return 1;
switch (a->af) {
case AF_INET:
if (a->u.v4.s_addr != b->u.v4.s_addr)
return 1;
break;
#ifdef CONFIG_IPV6
case AF_INET6:
if (os_memcmp(&a->u.v6, &b->u.v6, sizeof(a->u.v6)) != 0)
return 1;
break;
#endif /* CONFIG_IPV6 */
}
return 0;
}
int hostapd_parse_ip_addr(const char *txt, struct hostapd_ip_addr *addr)
{
#ifndef CONFIG_NATIVE_WINDOWS
if (inet_aton(txt, &addr->u.v4)) {
addr->af = AF_INET;
return 0;
}
#ifdef CONFIG_IPV6
if (inet_pton(AF_INET6, txt, &addr->u.v6) > 0) {
addr->af = AF_INET6;
return 0;
}
#endif /* CONFIG_IPV6 */
#endif /* CONFIG_NATIVE_WINDOWS */
return -1;
}