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Commit 84cc87ad authored by Eric Kooistra's avatar Eric Kooistra
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Added c_network_total_header_32b_*_wi word indices in the total header array... 

Added c_network_total_header_32b_*_wi word indices in the total header array to know when the field in the mapped record is valid.
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libraries/base/common/src/vhdl/common_network_total_header_pkg.vhd
+ 111
− 13
View file @ 84cc87ad
...@@ -21,7 +21,28 @@ ...@@ -21,7 +21,28 @@
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
-- Purpose: Map the fields of network headers on to a total header array of words -- Purpose: Map the fields of network headers on to a total header array of words
-- Description:
--
-- * 32b, word align = 2 octets
-- wi: |0 1 2 3 |4 5 6 7 8 | 9 10 | ...
-- octet: |---------------------------------|---------
-- 0 |x | | |
-- 1 |x eth | ipv4 | udp | udp payload
-- 2 | 14 | 20 | 8 |
-- 3 | | | |
--
-- * 64b, word align = 6 octets
-- wi: |0 1 2 |3 4 |5 | ...
-- octet: |-----------------|---------
-- 0 |x | | |
-- 1 |x eth |ipv4 |u | udp payload
-- 2 |x 14 | 20 |d |
-- 3 |x ___| |p |
-- 4 |x | |8 |
-- 5 |x | | |
-- 6 | | | |
-- 7 | | | |
--
LIBRARY IEEE; LIBRARY IEEE;
USE IEEE.std_logic_1164.ALL; USE IEEE.std_logic_1164.ALL;
USE IEEE.numeric_std.ALL; USE IEEE.numeric_std.ALL;
...@@ -30,24 +51,101 @@ USE work.common_network_layers_pkg.ALL; ...@@ -30,24 +51,101 @@ USE work.common_network_layers_pkg.ALL;
PACKAGE common_network_total_header_pkg IS PACKAGE common_network_total_header_pkg IS
-- All relevant packets in common_network_layers_pkg (arp, ipv4/icmp, ipv4/udp) have the same total header length -- Define total network header that fits all relevant packets in common_network_layers_pkg, because they have the same total header length
CONSTANT c_network_total_header_arp_len : NATURAL := c_network_eth_header_len + c_network_arp_data_len; -- = 14 + 28 = 42
CONSTANT c_network_total_header_icmp_len : NATURAL := c_network_eth_header_len + c_network_ip_header_len + c_network_icmp_header_len; -- = 14 + 20 + 8 = 42
CONSTANT c_network_total_header_udp_len : NATURAL := c_network_eth_header_len + c_network_ip_header_len + c_network_udp_header_len; -- = 14 + 20 + 8 = 42
CONSTANT c_network_total_header_len : NATURAL := 42; CONSTANT c_network_total_header_len : NATURAL := 42;
-- Map total network header in 32b or 64b words -----------------------------------------------------------------------------
CONSTANT c_network_total_header_32b_align_len : NATURAL := 2; -- c_network_eth_header_len + 2 = 16, to align eth, ip and udp payload to 32 bit boundaries -- Aggregate all supported network headers into one record
CONSTANT c_network_total_header_32b_align_w : NATURAL := c_network_total_header_32b_align_len*c_8; -----------------------------------------------------------------------------
TYPE t_network_total_header IS RECORD
eth : t_network_eth_header;
arp : t_network_arp_packet;
ip : t_network_ip_header;
icmp : t_network_icmp_header;
udp : t_network_udp_header;
END RECORD;
CONSTANT c_network_total_header_64b_align_len : NATURAL := 6; -- c_network_eth_header_len + 2 = 16, to align eth, ip and udp payload to 32 bit boundaries and
CONSTANT c_network_total_header_64b_align_w : NATURAL := c_network_total_header_64b_align_len*c_8; -- udp payload to 64 bit boundaries
CONSTANT c_network_total_header_nof_32b : NATURAL := (c_network_total_header_32b_align_len + c_network_total_header_len)/4; -- = 44 / c_word_sz = 11 -----------------------------------------------------------------------------
CONSTANT c_network_total_header_nof_64b : NATURAL := (c_network_total_header_64b_align_len + c_network_total_header_len)/8; -- = 48 / c_longword_sz = 6 -- Map total network header in words array
-----------------------------------------------------------------------------
TYPE t_network_total_header_32b_arr IS ARRAY(0 TO c_network_total_header_nof_32b-1) OF STD_LOGIC_VECTOR(c_32-1 DOWNTO 0); CONSTANT c_network_total_header_32b_align_len : NATURAL := 2; -- to align eth, ip and udp payload to 32 bit boundaries
TYPE t_network_total_header_64b_arr IS ARRAY(0 TO c_network_total_header_nof_64b-1) OF STD_LOGIC_VECTOR(c_64-1 DOWNTO 0); CONSTANT c_network_total_header_32b_align_w : NATURAL := c_network_total_header_32b_align_len*c_8;
CONSTANT c_network_total_header_64b_align_len : NATURAL := 6; -- to align eth, ip and udp payload to 32 bit boundaries and
CONSTANT c_network_total_header_64b_align_w : NATURAL := c_network_total_header_64b_align_len*c_8; -- udp payload to 64 bit boundaries
-- Combinatorial map of the total header array on to a network header record CONSTANT c_network_total_header_32b_nof_words : NATURAL := (c_network_total_header_32b_align_len + c_network_total_header_len)/4; -- = 44 / c_word_sz = 11
-- Type casting an array to a record is not possible, so therefore we need these functions CONSTANT c_network_total_header_64b_nof_words : NATURAL := (c_network_total_header_64b_align_len + c_network_total_header_len)/8; -- = 48 / c_longword_sz = 6
TYPE t_network_total_header_32b_arr IS ARRAY(0 TO c_network_total_header_32b_nof_words-1) OF STD_LOGIC_VECTOR(c_32-1 DOWNTO 0);
TYPE t_network_total_header_64b_arr IS ARRAY(0 TO c_network_total_header_64b_nof_words-1) OF STD_LOGIC_VECTOR(c_64-1 DOWNTO 0);
-- Word indices in the total header array to know when the field in the mapped record is valid
CONSTANT c_network_total_header_32b_eth_lo_wi : NATURAL := 0; -- first word index
CONSTANT c_network_total_header_32b_eth_dst_mac_wi : NATURAL := 1;
CONSTANT c_network_total_header_32b_eth_src_mac_wi : NATURAL := 3;
CONSTANT c_network_total_header_32b_eth_type_wi : NATURAL := 3;
CONSTANT c_network_total_header_32b_eth_hi_wi : NATURAL := 3; -- last word index
CONSTANT c_network_total_header_32b_eth_nof_words : NATURAL := c_network_total_header_32b_eth_hi_wi - c_network_total_header_32b_eth_lo_wi + 1;
CONSTANT c_network_total_header_32b_ip_lo_wi : NATURAL := 4; -- first word index
CONSTANT c_network_total_header_32b_ip_version_wi : NATURAL := 4;
CONSTANT c_network_total_header_32b_ip_header_length_wi : NATURAL := 4;
CONSTANT c_network_total_header_32b_ip_services_wi : NATURAL := 4;
CONSTANT c_network_total_header_32b_ip_total_length_wi : NATURAL := 4;
CONSTANT c_network_total_header_32b_ip_identification_wi : NATURAL := 5;
CONSTANT c_network_total_header_32b_ip_flags_wi : NATURAL := 5;
CONSTANT c_network_total_header_32b_ip_fragment_offset_wi : NATURAL := 5;
CONSTANT c_network_total_header_32b_ip_time_to_live_wi : NATURAL := 6;
CONSTANT c_network_total_header_32b_ip_protocol_wi : NATURAL := 6;
CONSTANT c_network_total_header_32b_ip_header_checksum_wi : NATURAL := 6;
CONSTANT c_network_total_header_32b_ip_src_ip_addr_wi : NATURAL := 7;
CONSTANT c_network_total_header_32b_ip_dst_ip_addr_wi : NATURAL := 8;
CONSTANT c_network_total_header_32b_ip_hi_wi : NATURAL := 8; -- last word index
CONSTANT c_network_total_header_32b_ip_nof_words : NATURAL := c_network_total_header_32b_ip_hi_wi - c_network_total_header_32b_ip_lo_wi + 1;
CONSTANT c_network_total_header_32b_arp_lo_wi : NATURAL := 4; -- first word index
CONSTANT c_network_total_header_32b_arp_htype_wi : NATURAL := 4;
CONSTANT c_network_total_header_32b_arp_ptype_wi : NATURAL := 4;
CONSTANT c_network_total_header_32b_arp_hlen_wi : NATURAL := 5;
CONSTANT c_network_total_header_32b_arp_plen_wi : NATURAL := 5;
CONSTANT c_network_total_header_32b_arp_oper_wi : NATURAL := 5;
CONSTANT c_network_total_header_32b_arp_sha_wi : NATURAL := 7;
CONSTANT c_network_total_header_32b_arp_spa_wi : NATURAL := 8;
CONSTANT c_network_total_header_32b_arp_tha_wi : NATURAL := 9;
CONSTANT c_network_total_header_32b_arp_tpa_wi : NATURAL := 10;
CONSTANT c_network_total_header_32b_arp_hi_wi : NATURAL := 10; -- last word index
CONSTANT c_network_total_header_32b_arp_nof_words : NATURAL := c_network_total_header_32b_arp_hi_wi - c_network_total_header_32b_arp_lo_wi + 1;
CONSTANT c_network_total_header_32b_icmp_lo_wi : NATURAL := 9; -- first word index
CONSTANT c_network_total_header_32b_icmp_msg_type_wi : NATURAL := 9;
CONSTANT c_network_total_header_32b_icmp_code_wi : NATURAL := 9;
CONSTANT c_network_total_header_32b_icmp_checksum_wi : NATURAL := 9;
CONSTANT c_network_total_header_32b_icmp_id_wi : NATURAL := 10;
CONSTANT c_network_total_header_32b_icmp_sequence_wi : NATURAL := 10;
CONSTANT c_network_total_header_32b_icmp_hi_wi : NATURAL := 10; -- last word index
CONSTANT c_network_total_header_32b_icmp_nof_words : NATURAL := c_network_total_header_32b_icmp_hi_wi - c_network_total_header_32b_icmp_lo_wi + 1;
CONSTANT c_network_total_header_32b_udp_lo_wi : NATURAL := 9; -- first word index
CONSTANT c_network_total_header_32b_udp_src_port_wi : NATURAL := 9;
CONSTANT c_network_total_header_32b_udp_dst_port_wi : NATURAL := 9;
CONSTANT c_network_total_header_32b_udp_total_length_wi : NATURAL := 10;
CONSTANT c_network_total_header_32b_udp_checksum_wi : NATURAL := 10;
CONSTANT c_network_total_header_32b_udp_hi_wi : NATURAL := 10; -- last word index
CONSTANT c_network_total_header_32b_udp_nof_words : NATURAL := c_network_total_header_32b_udp_hi_wi - c_network_total_header_32b_udp_lo_wi + 1;
-----------------------------------------------------------------------------
-- Functions to map between header record fields and header words array
-----------------------------------------------------------------------------
-- Combinatorial map of the total header array on to a network header record (type casting an array to a record is not possible, so therefore we need these functions)
FUNCTION func_network_total_header_extract_eth( hdr_arr : t_network_total_header_32b_arr) RETURN t_network_eth_header; FUNCTION func_network_total_header_extract_eth( hdr_arr : t_network_total_header_32b_arr) RETURN t_network_eth_header;
FUNCTION func_network_total_header_extract_ip( hdr_arr : t_network_total_header_32b_arr) RETURN t_network_ip_header; FUNCTION func_network_total_header_extract_ip( hdr_arr : t_network_total_header_32b_arr) RETURN t_network_ip_header;
FUNCTION func_network_total_header_extract_arp( hdr_arr : t_network_total_header_32b_arr) RETURN t_network_arp_packet; FUNCTION func_network_total_header_extract_arp( hdr_arr : t_network_total_header_32b_arr) RETURN t_network_arp_packet;
......
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