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;
}