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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Tubo 8051 cores MAC Interface Module                        ////
////                                                              ////
////  This file is part of the Turbo 8051 cores project           ////
////  http://www.opencores.org/cores/turbo8051/                   ////
////                                                              ////
////  Description                                                 ////
////  Turbo 8051 definitions.                                     ////
////                                                              ////
////  To Do:                                                      ////
////    nothing                                                   ////
////                                                              ////
////  Author(s):                                                  ////
////      - Dinesh Annayya, dinesha@opencores.org                 ////
////                                                              ////
////  Revision : Mar 2, 2011                                      //// 
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
////                                                              ////
//// This source file may be used and distributed without         ////
//// restriction provided that this copyright statement is not    ////
//// removed from the file and that any derivative work contains  ////
//// the original copyright notice and the associated disclaimer. ////
////                                                              ////
//// This source file is free software; you can redistribute it   ////
//// and/or modify it under the terms of the GNU Lesser General   ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any   ////
//// later version.                                               ////
////                                                              ////
//// This source is distributed in the hope that it will be       ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
//// PURPOSE.  See the GNU Lesser General Public License for more ////
//// details.                                                     ////
////                                                              ////
//// You should have received a copy of the GNU Lesser General    ////
//// Public License along with this source; if not, download it   ////
//// from http://www.opencores.org/lgpl.shtml                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
 
// ------------------------------------------------------------------------
// Description      : 
//   This module instantiates the Eth/Arp/IP/TCP/UDP Packet Parser
//
// ------------------------------------------------------------------------
module  g_eth_parser (
                    s_reset_n,
                    app_clk,
 
               // Configuration
                    cfg_filters,
                    cfg_mac_sa,
                    cfg_ip_sa,
 
               // Input Control Information
                    eop,
                    dval,
                    data,
 
                // output status 
                    pkt_done,
                    pkt_len,
                    pkt_status,
                    pkt_drop_ind,
                    pkt_drop_reason
               );
 
//------------------------------
// Global Input signal
//------------------------------                    
input               s_reset_n; // Active low reset signal
input               app_clk  ; // Application clock
 
//------------------------------
// Configuration
//------------------------------
input [31:0]        cfg_filters; // Filter rules
                                 // [0] - filtering enabled
                                 // [1] - allow local mac-da only
                                 // [2] - allow local mac-da only + IP4 local ip-da
                                 // [3] - allow local mac-da only + IP4 local ip-da + TCP
                                 // [4] - allow local mac-da only + IP4 local ip-da + UDP
                                 // [5] - allow local mac-da only + IP4 local ip-da + ICMP
                                 // [6] - allow local mac-da only + ARP
 
input [47:0]        cfg_mac_sa;      // 48 bit mac DA
input [31:0]        cfg_ip_sa;   // 32 bit IP DA
 
//---------------------------
// Input Control Information
//---------------------------
input               eop;
input               dval;
input [7:0]         data;
 
//-----------------------------             
// output status 
//-----------------------------
output   [11:0]     pkt_len;     // Packet Length
output              pkt_done;    // Packet Processing done indication
output   [15:0]     pkt_status;  // packet processing status
                                 // [1:0] - MAC-DA
                                 //         2'b00  - Broadcast frame
                                 //         2'b01  - Multicast frame
                                 //         2'b10  - unicast frame, other than local DA
                                 //         2'b11  - unicast local DA frame
                                 // [3:2] - MAC-SA
                                 //         2'b00  - Broadcast frame
                                 //         2'b01  - Multicast frame
                                 //         2'b10  - unicast frame, other than local DA
                                 //         2'b11  - unicast local DA frame
                                 // [6:4] - 3'b000 - Unknown Ethernet frame
                                 //         3'b001 - IP4 Frame
                                 //         3'b010 - IP4 Frame + TCP
                                 //         3'b011 - IP4 Frame + UDP
                                 //         3'b100 - IP4 Frame + ICMP
                                 //         3'b101 - ARP frame
output          pkt_drop_ind;    // Packet Drop Inidcation
 
output [7:0]    pkt_drop_reason; // Reason for Frame Drop
                                 // [0] - Non Local DA
                                 // [1] - Local DA == Remote SA
                                 // [2] - Non Local IP-DA
                                 // [3] - Local IP-DA == Remote IP-SA
                                 // [4] - Not Valid IP4/TCP/UDP/ARP/ICMP Frame
                                 // [5] - L2 Check sum error
                                 // [6] - L3 Check Sum Error
                                 // [7] - L4 Check Sum Error
 
reg [11:0]      bcnt           ; // Byte counter
reg [11:0]      pkt_len        ; // packet length
reg             pkt_done       ; // packet complete indication + Packet Status Valid
reg             pkt_drop_ind   ;
 
 
always @(negedge s_reset_n  or posedge app_clk) begin
   if(s_reset_n == 1'b0) begin
      bcnt         <= 0;
      pkt_len      <= 0;
      pkt_done     <= 0;
      pkt_drop_ind <= 0;
   end
   else begin
      if(dval) begin
         if(eop) begin
            bcnt <= 0;
            pkt_len  <= bcnt +1;
            pkt_done <= 1;
         end else begin
            bcnt <= bcnt +1;
            pkt_done <= 0;
         end
      end else begin
         pkt_done <= 0;
      end
   end
end
 
reg        mac_da_bc     ; // frame da is broad cast
reg        mac_da_mc     ; // frame da is multicast
reg        mac_da_match  ; // frame da match to local address
reg        mac_sa_bc     ; // frame sa is broadcast
reg        mac_sa_mc     ; // frame sa is multicast
reg        mac_sa_match  ; // frame sa match to local address
reg        ipv4f         ; // frame is ipv4 
reg        arpf          ; // frame is arp
reg        tcpf          ; // frame is tcp
reg        udpf          ; // frame is udp
reg        ip_sa_match   ; // ip4 sa matches to local IP Address 
reg        ip_da_match   ; // ip4 da matches to local IP Address
reg[15:0]  pkt_status    ; // Packet Status
 
always @(negedge s_reset_n or posedge app_clk) begin
   if(s_reset_n == 1'b0) begin
      mac_da_bc     <= 0;
      mac_da_mc     <= 0;
      mac_da_match  <= 0;
      mac_sa_bc     <= 0;
      mac_sa_mc     <= 0;
      mac_sa_match  <= 0;
      ipv4f         <= 0;
      arpf          <= 0;
      tcpf          <= 0;
      udpf          <= 0;
      ip_sa_match   <= 0;
      ip_da_match   <= 0;
      pkt_status    <= 0;
   end
   else begin
      if(dval) begin
           if(!eop) begin
         // DA Analysis
              // Broadcast Frame   
              mac_da_bc      <=  (bcnt == 0) ? (data == 8'hff)             :
                                 (bcnt == 1) ? (data == 8'hff) & mac_da_bc :
                                 (bcnt == 2) ? (data == 8'hff) & mac_da_bc :
                                 (bcnt == 3) ? (data == 8'hff) & mac_da_bc :
                                 (bcnt == 4) ? (data == 8'hff) & mac_da_bc :
                                 (bcnt == 5) ? (data == 8'hff) & mac_da_bc : mac_da_bc;
              // multicast frame
              mac_da_mc       <= (bcnt == 0) ? (data[7] == 1'b1)  : mac_da_mc & !mac_da_bc;
 
              // local unicast frame
              mac_da_match    <= (bcnt == 0) ? (cfg_mac_sa[7:0]   == data) :
                                 (bcnt == 1) ? (cfg_mac_sa[15:8]  == data) & mac_da_match :
                                 (bcnt == 2) ? (cfg_mac_sa[23:16] == data) & mac_da_match :
                                 (bcnt == 3) ? (cfg_mac_sa[31:24] == data) & mac_da_match :
                                 (bcnt == 4) ? (cfg_mac_sa[39:32] == data) & mac_da_match :
                                 (bcnt == 5) ? (cfg_mac_sa[47:40] == data) & mac_da_match :
                                 mac_da_match;
 
 
            // SA Analysis
              mac_sa_bc      <=  (bcnt == 6)  ? (data == 8'hff)             :
                                 (bcnt == 7)  ? (data == 8'hff) & mac_sa_bc :
                                 (bcnt == 8)  ? (data == 8'hff) & mac_sa_bc :
                                 (bcnt == 9)  ? (data == 8'hff) & mac_sa_bc :
                                 (bcnt == 10) ? (data == 8'hff) & mac_sa_bc :
                                 (bcnt == 11) ? (data == 8'hff) & mac_sa_bc : mac_sa_bc;
 
              mac_sa_mc      <= (bcnt == 6)  ? (data[7] == 1'b1)  : mac_sa_mc & !mac_sa_bc;
 
              mac_sa_match   <= (bcnt == 6)  ? (cfg_mac_sa[7:0]   == data) :
                                (bcnt == 7)  ? (cfg_mac_sa[15:8]  == data) & mac_sa_match :
                                (bcnt == 8)  ? (cfg_mac_sa[23:16] == data) & mac_sa_match :
                                (bcnt == 9)  ? (cfg_mac_sa[31:24] == data) & mac_sa_match :
                                (bcnt == 10) ? (cfg_mac_sa[39:32] == data) & mac_sa_match :
                                (bcnt == 11) ? (cfg_mac_sa[47:40] == data) & mac_sa_match :
                                mac_sa_match;
 
             // L3 Protocol Analysis
              ipv4f          <= (bcnt == 12) ? (data == 8'h08) :
                             (bcnt == 13) ? (data == 8'h00) & ipv4f : ipv4f;
 
              arpf           <= (bcnt == 12) ? (data == 8'h08) :
                            (bcnt == 13) ? (data == 8'h06) & arpf : arpf;
             // L4 Protocol Analysis
              tcpf           <= (bcnt == 23) ? (data == 8'h06) & ipv4f: tcpf;
              udpf           <= (bcnt == 23) ? (data == 8'h11) & ipv4f: udpf;
             // IP DA and SA Match
              ip_sa_match     <= (bcnt == 26) ? (data == cfg_ip_sa[7:0])   & ipv4f:
                                 (bcnt == 27) ? (data == cfg_ip_sa[15:8])  & ipv4f & ip_sa_match:
                                 (bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_sa_match:
                                 (bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_sa_match:
                                 ip_sa_match;
              ip_da_match     <= (bcnt == 26) ? (data == cfg_ip_sa[7:0])   & ipv4f:
                                 (bcnt == 27) ? (data == cfg_ip_sa[15:8])  & ipv4f & ip_da_match:
                                 (bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_da_match:
                                 (bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_da_match:
                                 ip_da_match;
 
           end else begin // on EOP
 
            if(&mac_da_match) begin
               pkt_status[1:0] <= 2'b11; // Local DA
            end else if(mac_da_bc) begin
               pkt_status[1:0] <= 2'b00;  // Broadcast frame
            end else if(mac_da_mc) begin
               pkt_status[1:0] <= 2'b01; // Multicase frame
            end else
               pkt_status[1:0] <= 2'b10; // Unknown Unicast frame
 
            if(&mac_sa_match) begin
               pkt_status[3:2] <= 2'b11; // Local DA
            end else if(mac_sa_bc) begin
               pkt_status[3:2] <= 2'b00;  // Broadcast frame
            end else if(mac_sa_mc) begin
               pkt_status[3:2] <= 2'b01; // Multicast frame
            end else
               pkt_status[3:2] <= 2'b10; // Unknown Unicast frame
 
            if(tcpf) begin
               pkt_status[6:4] <= 3'b010; // IP4 Frame + TCP
            end else if(udpf) begin
               pkt_status[6:4] <= 3'b011; // IP4 Frame + UDP
            end else if(arpf) begin
               pkt_status[6:4] <= 3'b101; // ARP frame
            end else
               pkt_status[6:4] <= 2'b00; // UnKnown Ethernet frame
 
            mac_da_match  <= 0;
            mac_sa_match  <= 0;
            mac_sa_bc     <= 0;
            mac_sa_mc     <= 0;
            mac_da_bc     <= 0;
            mac_da_mc     <= 0;
            tcpf          <= 0;
            udpf          <= 0;
            arpf          <= 0;
            ipv4f         <= 0;
         end
      end
   end
end
 
 
endmodule

Line No.	Rev	Author	Line
1	36	dinesha	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// Tubo 8051 cores MAC Interface Module ////`
4			`//// ////`
5			`//// This file is part of the Turbo 8051 cores project ////`
6			`//// http://www.opencores.org/cores/turbo8051/ ////`
7			`//// ////`
8			`//// Description ////`
9			`//// Turbo 8051 definitions. ////`
10			`//// ////`
11			`//// To Do: ////`
12			`//// nothing ////`
13			`//// ////`
14			`//// Author(s): ////`
15			`//// - Dinesh Annayya, dinesha@opencores.org ////`
16			`//// ////`
17	76	dinesha	`//// Revision : Mar 2, 2011 ////`
18			`//// ////`
19	36	dinesha	`//////////////////////////////////////////////////////////////////////`
20			`//// ////`
21			`//// Copyright (C) 2000 Authors and OPENCORES.ORG ////`
22			`//// ////`
23			`//// This source file may be used and distributed without ////`
24			`//// restriction provided that this copyright statement is not ////`
25			`//// removed from the file and that any derivative work contains ////`
26			`//// the original copyright notice and the associated disclaimer. ////`
27			`//// ////`
28			`//// This source file is free software; you can redistribute it ////`
29			`//// and/or modify it under the terms of the GNU Lesser General ////`
30			`//// Public License as published by the Free Software Foundation; ////`
31			`//// either version 2.1 of the License, or (at your option) any ////`
32			`//// later version. ////`
33			`//// ////`
34			`//// This source is distributed in the hope that it will be ////`
35			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
36			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
37			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
38			`//// details. ////`
39			`//// ////`
40			`//// You should have received a copy of the GNU Lesser General ////`
41			`//// Public License along with this source; if not, download it ////`
42			`//// from http://www.opencores.org/lgpl.shtml ////`
43			`//// ////`
44			`//////////////////////////////////////////////////////////////////////`
45
46			`// ------------------------------------------------------------------------`
47			`// Description :`
48			`// This module instantiates the Eth/Arp/IP/TCP/UDP Packet Parser`
49			`//`
50			`// ------------------------------------------------------------------------`
51			`module g_eth_parser (`
52			`s_reset_n,`
53			`app_clk,`
54
55			`// Configuration`
56			`cfg_filters,`
57			`cfg_mac_sa,`
58			`cfg_ip_sa,`
59
60			`// Input Control Information`
61			`eop,`
62			`dval,`
63			`data,`
64
65			`// output status`
66			`pkt_done,`
67			`pkt_len,`
68			`pkt_status,`
69			`pkt_drop_ind,`
70			`pkt_drop_reason`
71			`);`
72
73			`//------------------------------`
74			`// Global Input signal`
75			`//------------------------------`
76			`input s_reset_n; // Active low reset signal`
77			`input app_clk ; // Application clock`
78
79			`//------------------------------`
80			`// Configuration`
81			`//------------------------------`
82			`input [31:0] cfg_filters; // Filter rules`
83			`// [0] - filtering enabled`
84			`// [1] - allow local mac-da only`
85			`// [2] - allow local mac-da only + IP4 local ip-da`
86			`// [3] - allow local mac-da only + IP4 local ip-da + TCP`
87			`// [4] - allow local mac-da only + IP4 local ip-da + UDP`
88			`// [5] - allow local mac-da only + IP4 local ip-da + ICMP`
89			`// [6] - allow local mac-da only + ARP`
90
91			`input [47:0] cfg_mac_sa; // 48 bit mac DA`
92			`input [31:0] cfg_ip_sa; // 32 bit IP DA`
93
94			`//---------------------------`
95			`// Input Control Information`
96			`//---------------------------`
97			`input eop;`
98			`input dval;`
99			`input [7:0] data;`
100
101			`//-----------------------------`
102			`// output status`
103			`//-----------------------------`
104			`output [11:0] pkt_len; // Packet Length`
105			`output pkt_done; // Packet Processing done indication`
106	50	dinesha	`output [15:0] pkt_status; // packet processing status`
107	36	dinesha	`// [1:0] - MAC-DA`
108			`// 2'b00 - Broadcast frame`
109			`// 2'b01 - Multicast frame`
110			`// 2'b10 - unicast frame, other than local DA`
111			`// 2'b11 - unicast local DA frame`
112			`// [3:2] - MAC-SA`
113			`// 2'b00 - Broadcast frame`
114			`// 2'b01 - Multicast frame`
115			`// 2'b10 - unicast frame, other than local DA`
116			`// 2'b11 - unicast local DA frame`
117			`// [6:4] - 3'b000 - Unknown Ethernet frame`
118			`// 3'b001 - IP4 Frame`
119			`// 3'b010 - IP4 Frame + TCP`
120			`// 3'b011 - IP4 Frame + UDP`
121			`// 3'b100 - IP4 Frame + ICMP`
122			`// 3'b101 - ARP frame`
123			`output pkt_drop_ind; // Packet Drop Inidcation`
124
125			`output [7:0] pkt_drop_reason; // Reason for Frame Drop`
126			`// [0] - Non Local DA`
127			`// [1] - Local DA == Remote SA`
128			`// [2] - Non Local IP-DA`
129			`// [3] - Local IP-DA == Remote IP-SA`
130			`// [4] - Not Valid IP4/TCP/UDP/ARP/ICMP Frame`
131			`// [5] - L2 Check sum error`
132			`// [6] - L3 Check Sum Error`
133			`// [7] - L4 Check Sum Error`
134
135			`reg [11:0] bcnt ; // Byte counter`
136			`reg [11:0] pkt_len ; // packet length`
137			`reg pkt_done ; // packet complete indication + Packet Status Valid`
138	50	dinesha	`reg pkt_drop_ind ;`
139	36	dinesha
140	50	dinesha
141	61	dinesha	`always @(negedge s_reset_n or posedge app_clk) begin`
142	36	dinesha	`if(s_reset_n == 1'b0) begin`
143	50	dinesha	`bcnt <= 0;`
144			`pkt_len <= 0;`
145			`pkt_done <= 0;`
146			`pkt_drop_ind <= 0;`
147	36	dinesha	`end`
148			`else begin`
149			`if(dval) begin`
150			`if(eop) begin`
151			`bcnt <= 0;`
152			`pkt_len <= bcnt +1;`
153			`pkt_done <= 1;`
154			`end else begin`
155			`bcnt <= bcnt +1;`
156			`pkt_done <= 0;`
157			`end`
158			`end else begin`
159			`pkt_done <= 0;`
160			`end`
161			`end`
162			`end`
163
164			`reg mac_da_bc ; // frame da is broad cast`
165			`reg mac_da_mc ; // frame da is multicast`
166			`reg mac_da_match ; // frame da match to local address`
167			`reg mac_sa_bc ; // frame sa is broadcast`
168			`reg mac_sa_mc ; // frame sa is multicast`
169			`reg mac_sa_match ; // frame sa match to local address`
170			`reg ipv4f ; // frame is ipv4`
171			`reg arpf ; // frame is arp`
172			`reg tcpf ; // frame is tcp`
173			`reg udpf ; // frame is udp`
174			`reg ip_sa_match ; // ip4 sa matches to local IP Address`
175			`reg ip_da_match ; // ip4 da matches to local IP Address`
176	50	dinesha	`reg[15:0] pkt_status ; // Packet Status`
177	36	dinesha
178	61	dinesha	`always @(negedge s_reset_n or posedge app_clk) begin`
179	36	dinesha	`if(s_reset_n == 1'b0) begin`
180			`mac_da_bc <= 0;`
181			`mac_da_mc <= 0;`
182			`mac_da_match <= 0;`
183			`mac_sa_bc <= 0;`
184			`mac_sa_mc <= 0;`
185			`mac_sa_match <= 0;`
186			`ipv4f <= 0;`
187			`arpf <= 0;`
188			`tcpf <= 0;`
189			`udpf <= 0;`
190			`ip_sa_match <= 0;`
191			`ip_da_match <= 0;`
192			`pkt_status <= 0;`
193			`end`
194			`else begin`
195			`if(dval) begin`
196			`if(!eop) begin`
197			`// DA Analysis`
198			`// Broadcast Frame`
199			`mac_da_bc <= (bcnt == 0) ? (data == 8'hff) :`
200			`(bcnt == 1) ? (data == 8'hff) & mac_da_bc :`
201			`(bcnt == 2) ? (data == 8'hff) & mac_da_bc :`
202			`(bcnt == 3) ? (data == 8'hff) & mac_da_bc :`
203			`(bcnt == 4) ? (data == 8'hff) & mac_da_bc :`
204			`(bcnt == 5) ? (data == 8'hff) & mac_da_bc : mac_da_bc;`
205			`// multicast frame`
206			`mac_da_mc <= (bcnt == 0) ? (data[7] == 1'b1) : mac_da_mc & !mac_da_bc;`
207
208			`// local unicast frame`
209			`mac_da_match <= (bcnt == 0) ? (cfg_mac_sa[7:0] == data) :`
210			`(bcnt == 1) ? (cfg_mac_sa[15:8] == data) & mac_da_match :`
211			`(bcnt == 2) ? (cfg_mac_sa[23:16] == data) & mac_da_match :`
212			`(bcnt == 3) ? (cfg_mac_sa[31:24] == data) & mac_da_match :`
213			`(bcnt == 4) ? (cfg_mac_sa[39:32] == data) & mac_da_match :`
214			`(bcnt == 5) ? (cfg_mac_sa[47:40] == data) & mac_da_match :`
215			`mac_da_match;`
216
217
218			`// SA Analysis`
219			`mac_sa_bc <= (bcnt == 6) ? (data == 8'hff) :`
220			`(bcnt == 7) ? (data == 8'hff) & mac_sa_bc :`
221			`(bcnt == 8) ? (data == 8'hff) & mac_sa_bc :`
222			`(bcnt == 9) ? (data == 8'hff) & mac_sa_bc :`
223			`(bcnt == 10) ? (data == 8'hff) & mac_sa_bc :`
224			`(bcnt == 11) ? (data == 8'hff) & mac_sa_bc : mac_sa_bc;`
225
226			`mac_sa_mc <= (bcnt == 6) ? (data[7] == 1'b1) : mac_sa_mc & !mac_sa_bc;`
227
228			`mac_sa_match <= (bcnt == 6) ? (cfg_mac_sa[7:0] == data) :`
229			`(bcnt == 7) ? (cfg_mac_sa[15:8] == data) & mac_sa_match :`
230			`(bcnt == 8) ? (cfg_mac_sa[23:16] == data) & mac_sa_match :`
231			`(bcnt == 9) ? (cfg_mac_sa[31:24] == data) & mac_sa_match :`
232			`(bcnt == 10) ? (cfg_mac_sa[39:32] == data) & mac_sa_match :`
233			`(bcnt == 11) ? (cfg_mac_sa[47:40] == data) & mac_sa_match :`
234			`mac_sa_match;`
235
236			`// L3 Protocol Analysis`
237			`ipv4f <= (bcnt == 12) ? (data == 8'h08) :`
238			`(bcnt == 13) ? (data == 8'h00) & ipv4f : ipv4f;`
239
240			`arpf <= (bcnt == 12) ? (data == 8'h08) :`
241			`(bcnt == 13) ? (data == 8'h06) & arpf : arpf;`
242			`// L4 Protocol Analysis`
243			`tcpf <= (bcnt == 23) ? (data == 8'h06) & ipv4f: tcpf;`
244			`udpf <= (bcnt == 23) ? (data == 8'h11) & ipv4f: udpf;`
245			`// IP DA and SA Match`
246			`ip_sa_match <= (bcnt == 26) ? (data == cfg_ip_sa[7:0]) & ipv4f:`
247			`(bcnt == 27) ? (data == cfg_ip_sa[15:8]) & ipv4f & ip_sa_match:`
248			`(bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_sa_match:`
249			`(bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_sa_match:`
250			`ip_sa_match;`
251			`ip_da_match <= (bcnt == 26) ? (data == cfg_ip_sa[7:0]) & ipv4f:`
252			`(bcnt == 27) ? (data == cfg_ip_sa[15:8]) & ipv4f & ip_da_match:`
253			`(bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_da_match:`
254			`(bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_da_match:`
255			`ip_da_match;`
256
257			`end else begin // on EOP`
258
259			`if(&mac_da_match) begin`
260			`pkt_status[1:0] <= 2'b11; // Local DA`
261			`end else if(mac_da_bc) begin`
262			`pkt_status[1:0] <= 2'b00; // Broadcast frame`
263			`end else if(mac_da_mc) begin`
264			`pkt_status[1:0] <= 2'b01; // Multicase frame`
265			`end else`
266			`pkt_status[1:0] <= 2'b10; // Unknown Unicast frame`
267
268			`if(&mac_sa_match) begin`
269			`pkt_status[3:2] <= 2'b11; // Local DA`
270			`end else if(mac_sa_bc) begin`
271			`pkt_status[3:2] <= 2'b00; // Broadcast frame`
272			`end else if(mac_sa_mc) begin`
273			`pkt_status[3:2] <= 2'b01; // Multicast frame`
274			`end else`
275			`pkt_status[3:2] <= 2'b10; // Unknown Unicast frame`
276
277			`if(tcpf) begin`
278			`pkt_status[6:4] <= 3'b010; // IP4 Frame + TCP`
279			`end else if(udpf) begin`
280			`pkt_status[6:4] <= 3'b011; // IP4 Frame + UDP`
281			`end else if(arpf) begin`
282			`pkt_status[6:4] <= 3'b101; // ARP frame`
283			`end else`
284			`pkt_status[6:4] <= 2'b00; // UnKnown Ethernet frame`
285
286			`mac_da_match <= 0;`
287			`mac_sa_match <= 0;`
288			`mac_sa_bc <= 0;`
289			`mac_sa_mc <= 0;`
290			`mac_da_bc <= 0;`
291			`mac_da_mc <= 0;`
292	61	dinesha	`tcpf <= 0;`
293			`udpf <= 0;`
294			`arpf <= 0;`
295			`ipv4f <= 0;`
296	36	dinesha	`end`
297			`end`
298			`end`
299			`end`
300
301
302			`endmodule`

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