/*
 * Copyright (c) 2016, Matias Fontanini
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following disclaimer
 *   in the documentation and/or other materials provided with the
 *   distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include "address_range.h"
#include "ip_address.h"
#include "ipv6_address.h"

using std::logic_error;

namespace Tins {

IPv4Range operator/(const IPv4Address& addr, int mask) {
    if (mask > 32) {
        throw logic_error("Prefix length cannot exceed 32");
    }
    return IPv4Range::from_mask(
        addr, 
        IPv4Address(Endian::host_to_be(0xffffffff << (32 - mask)))
    );
}

IPv6Range operator/(const IPv6Address& addr, int mask) {
    if (mask > 128) {
        throw std::logic_error("Prefix length cannot exceed 128");
    }
    IPv6Address last_addr;
    IPv6Address::iterator it = last_addr.begin();
    while (mask > 8) {
        *it = 0xff;
        ++it;
        mask -= 8;
    }
    *it = 0xff << (8 - mask);
    return IPv6Range::from_mask(addr, last_addr);
}

} // Tins
