    const std = @import("std");
    const uefi = std.os.uefi;
    const Guid = uefi.Guid;
    const Event = uefi.Event;
    const Status = uefi.Status;
    const MacAddress = uefi.protocols.MacAddress;
    const ManagedNetworkConfigData = uefi.protocols.ManagedNetworkConfigData;
    const SimpleNetworkMode = uefi.protocols.SimpleNetworkMode;
    const cc = uefi.cc;

    pub const Ip6Protocol = extern struct {
        _get_mode_data: *const fn (*const Ip6Protocol, ?*Ip6ModeData, ?*ManagedNetworkConfigData, ?*SimpleNetworkMode) callconv(cc) Status,
        _configure: *const fn (*const Ip6Protocol, ?*const Ip6ConfigData) callconv(cc) Status,
        _groups: *const fn (*const Ip6Protocol, bool, ?*const Ip6Address) callconv(cc) Status,
        _routes: *const fn (*const Ip6Protocol, bool, ?*const Ip6Address, u8, ?*const Ip6Address) callconv(cc) Status,
        _neighbors: *const fn (*const Ip6Protocol, bool, *const Ip6Address, ?*const MacAddress, u32, bool) callconv(cc) Status,
        _transmit: *const fn (*const Ip6Protocol, *Ip6CompletionToken) callconv(cc) Status,
        _receive: *const fn (*const Ip6Protocol, *Ip6CompletionToken) callconv(cc) Status,
        _cancel: *const fn (*const Ip6Protocol, ?*Ip6CompletionToken) callconv(cc) Status,
        _poll: *const fn (*const Ip6Protocol) callconv(cc) Status,

        /// Gets the current operational settings for this instance of the EFI IPv6 Protocol driver.
        pub fn getModeData(self: *const Ip6Protocol, ip6_mode_data: ?*Ip6ModeData, mnp_config_data: ?*ManagedNetworkConfigData, snp_mode_data: ?*SimpleNetworkMode) Status {
            return self._get_mode_data(self, ip6_mode_data, mnp_config_data, snp_mode_data);
        }

        /// Assign IPv6 address and other configuration parameter to this EFI IPv6 Protocol driver instance.
        pub fn configure(self: *const Ip6Protocol, ip6_config_data: ?*const Ip6ConfigData) Status {
            return self._configure(self, ip6_config_data);
        }

        /// Joins and leaves multicast groups.
        pub fn groups(self: *const Ip6Protocol, join_flag: bool, group_address: ?*const Ip6Address) Status {
            return self._groups(self, join_flag, group_address);
        }

        /// Adds and deletes routing table entries.
        pub fn routes(self: *const Ip6Protocol, delete_route: bool, destination: ?*const Ip6Address, prefix_length: u8, gateway_address: ?*const Ip6Address) Status {
            return self._routes(self, delete_route, destination, prefix_length, gateway_address);
        }

        /// Add or delete Neighbor cache entries.
        pub fn neighbors(self: *const Ip6Protocol, delete_flag: bool, target_ip6_address: *const Ip6Address, target_link_address: ?*const MacAddress, timeout: u32, override: bool) Status {
            return self._neighbors(self, delete_flag, target_ip6_address, target_link_address, timeout, override);
        }

        /// Places outgoing data packets into the transmit queue.
        pub fn transmit(self: *const Ip6Protocol, token: *Ip6CompletionToken) Status {
            return self._transmit(self, token);
        }

        /// Places a receiving request into the receiving queue.
        pub fn receive(self: *const Ip6Protocol, token: *Ip6CompletionToken) Status {
            return self._receive(self, token);
        }

        /// Abort an asynchronous transmits or receive request.
        pub fn cancel(self: *const Ip6Protocol, token: ?*Ip6CompletionToken) Status {
            return self._cancel(self, token);
        }

        /// Polls for incoming data packets and processes outgoing data packets.
        pub fn poll(self: *const Ip6Protocol) Status {
            return self._poll(self);
        }

        pub const guid align(8) = Guid{
            .time_low = 0x2c8759d5,
            .time_mid = 0x5c2d,
            .time_high_and_version = 0x66ef,
            .clock_seq_high_and_reserved = 0x92,
            .clock_seq_low = 0x5f,
            .node = [_]u8{ 0xb6, 0x6c, 0x10, 0x19, 0x57, 0xe2 },
        };
    };

    pub const Ip6ModeData = extern struct {
        is_started: bool,
        max_packet_size: u32,
        config_data: Ip6ConfigData,
        is_configured: bool,
        address_count: u32,
        address_list: [*]Ip6AddressInfo,
        group_count: u32,
        group_table: [*]Ip6Address,
        route_count: u32,
        route_table: [*]Ip6RouteTable,
        neighbor_count: u32,
        neighbor_cache: [*]Ip6NeighborCache,
        prefix_count: u32,
        prefix_table: [*]Ip6AddressInfo,
        icmp_type_count: u32,
        icmp_type_list: [*]Ip6IcmpType,
    };

    pub const Ip6ConfigData = extern struct {
        default_protocol: u8,
        accept_any_protocol: bool,
        accept_icmp_errors: bool,
        accept_promiscuous: bool,
        destination_address: Ip6Address,
        station_address: Ip6Address,
        traffic_class: u8,
        hop_limit: u8,
        flow_label: u32,
        receive_timeout: u32,
        transmit_timeout: u32,
    };

    pub const Ip6Address = [16]u8;

    pub const Ip6AddressInfo = extern struct {
        address: Ip6Address,
        prefix_length: u8,
    };

    pub const Ip6RouteTable = extern struct {
        gateway: Ip6Address,
        destination: Ip6Address,
        prefix_length: u8,
    };

    pub const Ip6NeighborState = enum(u32) {
        Incomplete,
        Reachable,
        Stale,
        Delay,
        Probe,
    };

    pub const Ip6NeighborCache = extern struct {
        neighbor: Ip6Address,
        link_address: MacAddress,
        state: Ip6NeighborState,
    };

    pub const Ip6IcmpType = extern struct {
        type: u8,
        code: u8,
    };

    pub const Ip6CompletionToken = extern struct {
        event: Event,
        status: Status,
        packet: *anyopaque, // union TODO

    };