Subversion Repositories udp_ip_stack

--

--

--      Purpose: This package defines types for use in IPv4

library IEEE;

use IEEE.STD_LOGIC_1164.all;

use work.axi.all;

package ipv4_types is

        constant IP_BC_ADDR             : std_logic_vector (31 downto 0) := x"ffffffff";

        constant MAC_BC_ADDR            : std_logic_vector (47 downto 0) := x"ffffffffffff";

        --------------

        -- IPv4 TX --

        --------------

        -- coding for result in tx

        constant IPTX_RESULT_NONE               : std_logic_vector (1 downto 0) := "00";

        constant IPTX_RESULT_SENDING    : std_logic_vector (1 downto 0) := "01";

        constant IPTX_RESULT_ERR                : std_logic_vector (1 downto 0) := "10";

        constant IPTX_RESULT_SENT               : std_logic_vector (1 downto 0) := "11";

        type ipv4_tx_header_type is record

                protocol                                : std_logic_vector (7 downto 0);

                data_length                     : STD_LOGIC_VECTOR (15 downto 0);                -- user data size, bytes

                dst_ip_addr             : STD_LOGIC_VECTOR (31 downto 0);

        end record;

        type ipv4_tx_type is record

                hdr                             : ipv4_tx_header_type;                                          -- header to tx

                data                            : axi_out_type;                                                         -- tx axi bus

        end record;

        --------------

        -- IPv4 RX --

        --------------

        -- coding for last_error_code in rx hdr

        constant RX_EC_NONE             : std_logic_vector (3 downto 0) := x"0";

        constant RX_EC_ET_ETH   : std_logic_vector (3 downto 0) := x"1"; -- early termination in ETH hdr phase

        constant RX_EC_ET_IP    : std_logic_vector (3 downto 0) := x"2"; -- early termination in IP hdr phase

        constant RX_EC_ET_USER  : std_logic_vector (3 downto 0) := x"3"; -- early termination in USER DATA phase

        type ipv4_rx_header_type is record

                is_valid                                : std_logic;

                protocol                                : std_logic_vector (7 downto 0);

                data_length                     : STD_LOGIC_VECTOR (15 downto 0);        -- user data size, bytes

                src_ip_addr             : STD_LOGIC_VECTOR (31 downto 0);

                num_frame_errors        : std_logic_vector (7 downto 0);

                last_error_code : std_logic_vector (3 downto 0);         -- see RX_EC_xxx constants

                is_broadcast            : std_logic;                                                            -- set if the msg received is a broadcast

        end record;

        type ipv4_rx_type is record

                hdr                             : ipv4_rx_header_type;                                          -- header received

                data                            : axi_in_type;                                                                  -- rx axi bus

        end record;

        ------------

        -- UDP TX --

        ------------

        -- coding for result in tx

        constant UDPTX_RESULT_NONE              : std_logic_vector (1 downto 0) := "00";

        constant UDPTX_RESULT_SENDING   : std_logic_vector (1 downto 0) := "01";

        constant UDPTX_RESULT_ERR                       : std_logic_vector (1 downto 0) := "10";

        constant UDPTX_RESULT_SENT              : std_logic_vector (1 downto 0) := "11";

        type udp_tx_header_type is record

                dst_ip_addr             : STD_LOGIC_VECTOR (31 downto 0);

                dst_port                                : STD_LOGIC_VECTOR (15 downto 0);

                src_port                                : STD_LOGIC_VECTOR (15 downto 0);

                data_length                     : STD_LOGIC_VECTOR (15 downto 0);        -- user data size, bytes

                checksum                                : STD_LOGIC_VECTOR (15 downto 0);

        end record;

        type udp_tx_type is record

                hdr                             : udp_tx_header_type;                                           -- header received

                data                            : axi_out_type;                                                         -- tx axi bus

        end record;

        ------------

        -- UDP RX --

        ------------

        type udp_rx_header_type is record

                is_valid                                : std_logic;

                src_ip_addr             : STD_LOGIC_VECTOR (31 downto 0);

                src_port                                : STD_LOGIC_VECTOR (15 downto 0);

                dst_port                                : STD_LOGIC_VECTOR (15 downto 0);

                data_length                     : STD_LOGIC_VECTOR (15 downto 0);        -- user data size, bytes

        end record;

        type udp_rx_type is record

                hdr                             : udp_rx_header_type;                                           -- header received

                data                            : axi_in_type;                                                                  -- rx axi bus

        end record;

        type udp_addr_type is record

                ip_addr                         : STD_LOGIC_VECTOR (31 downto 0);

                port_num                        : STD_LOGIC_VECTOR (15 downto 0);

        end record;

end ipv4_types;