// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library fuchsia.net;

// IPv4Address is expressed in network byte order, so the most significant byte
// ("127" in the address "127.0.0.1") will be at index 0.
struct IPv4Address {
    array<uint8>:4 addr;
};

// IPv6Address is expressed in network byte order, so the most significant byte
// ("ff" in the address "ff02::1") will be at index 0.
struct IPv6Address {
    array<uint8>:16 addr;
};

union IpAddress {
    IPv4Address ipv4;
    IPv6Address ipv6;
};

struct Subnet {
    // The IPv4 or IPv6 address. Only the |prefix_len| most significant bits may be set in |addr|;
    // all bits in the host portion of the address must be zero.
    IpAddress addr;

    // The prefix length of the netmask. E.g. for 192.168.1.0/24, the prefix
    // length is 24, corresponding to a netmask of 255.255.255.0.
    // For IPv4, prefix_len must be in the range [0, 32].
    // For IPv6, prefix_len must be in the range [0, 128].
    uint8 prefix_len;
};