verif/env/common/vera/niu_ippktgen/pcg_debug.vr

// ========== Copyright Header Begin ==========================================
//
// OpenSPARC T2 Processor File: pcg_debug.vr
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
// 4150 Network Circle, Santa Clara, California 95054, U.S.A.
//
// * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// For the avoidance of doubt, and except that if any non-GPL license
// choice is available it will apply instead, Sun elects to use only
// the General Public License version 2 (GPLv2) at this time for any
// software where a choice of GPL license versions is made
// available with the language indicating that GPLv2 or any later version
// may be used, or where a choice of which version of the GPL is applied is
// otherwise unspecified.
//
// Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
// CA 95054 USA or visit www.sun.com if you need additional information or
// have any questions.
//
// ========== Copyright Header End ============================================
task display_buf( byte_array buf, integer hwlen, (integer ifedx=0)) {
    integer ptr=0;
    integer tunneling_ipv4 =0;
    integer tunneling_ipv6 =0;
    integer buf_shift;
    integer n;
    bit [15:0] len;
    bit [7:0] flag_bit;
    bit [79:0] id;
    integer token;

    printf("\n\n______________________________________________________________\n");
    printf("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv\n\n");

    if(ifedx==1)        printf("This is an INTER FEDX packet\n\n");

    printf("____________ Hex Dump ____________\n");
    for(n=0;n<hwlen;n++) {
        if( !(n % 16) ) printf("\n%d: ",n);
        printf("%h ", buf.val[ptr++]);
    }
    printf("\n__________________________________\n\n");

    ptr=0;

    if(ifedx==1)        {
        printf("Interfedx Control Word: %h\n\n", {buf.val[ptr+1], buf.val[ptr]} );
        ptr=ptr+2;
    }


    // L2 Header Info

    printf("   L2 Header\n");
    printf("+---------------\n");

    printf("| Destination Address: %h.%h.%h.%h.%h.%h\n", buf.val[ptr++], buf.val[ptr++],
        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
    printf("|      Source Address: %h.%h.%h.%h.%h.%h\n", buf.val[ptr++], buf.val[ptr++],
        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );

    len = {buf.val[ptr++], buf.val[ptr++]};


    // check if it is an Ethernet Tagged (802.Q) Frame
    if( len == TPID_8021Q ) {

        // check to see if it is an LLC-SNAP packet
        if( {buf.val[ptr+4], buf.val[ptr+5], buf.val[ptr+6]} == LLC_SNAP ) {
            printf("|      L2 Header Type: 802.1Q Tagged LLC-SNAP Ethernet Header\n");
            printf("|                TPID: %0h\n", len );
            printf("|                 TCI: %h\n", {buf.val[ptr++], buf.val[ptr++]} );

            len = {buf.val[ptr++], buf.val[ptr++]};

            printf("|            LEN/TYPE: 0x%h(%0d)\n", len, len );
            printf("|                 LLC: %h\n", {buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] });
            printf("|                SNAP: %h\n", {buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                                                             buf.val[ptr++], buf.val[ptr++] } );
            // Store L2 pkt type
            len = {buf.val[ptr - 2], buf.val[ptr - 1]};
        }
        else {
            // it is not an LLC-SNAP packet

            printf("|      L2 Header Type: 802.1Q Tagged Ethernet Header\n");
            printf("|                TPID: %0h\n", len );
            printf("|                 TCI: %h\n", {buf.val[ptr++], buf.val[ptr++]} );

            len = {buf.val[ptr++], buf.val[ptr++]};

            printf("|            TYPE/LEN: 0x%h(%d)\n", len, len);
        }
    }
    else if ( len == CNTL_FRAME )  {
        // Check to see if it is a MAC control Frame

        printf("|      L2 Header Type:  MAC Control Frame Header\n");
        printf("|                Type: %h\n", len );
    }
    else {
        // packet is a regular 802.3 Ethernet packet
        printf("|      L2 Header Type: 802.3 Ethernet Header\n");
        printf("|    Data Length/Type: 0x%h(%0d)\n", len, len);
    }

    token = { buf.val[ptr], buf.val[ptr+1] };


    // Check to see if it has an L3 Header
    if(len>16'h0600 & len != CNTL_FRAME) {
        len = -1;

        // check version field to see whether it is an IPv4 or IPv6 packet
        if( buf.val[ptr - 2 ] == 8'h08 ) {

            // it is an IPv4 packet

            // Check protocol field to see if it is an IPSec packet
            if( buf.val[ptr + 9] == AH_PROTO) {
                //  Authetication Header (AH) option present
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: IPv4, IPSec: AH\n");
                printf("+--------------------------------------\n");
            }
            else if( buf.val[ptr + 9] == ESP_PROTO) {
                //  Encapsulating Security Payload (ESP) option present
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: IPv4, IPSec: ESP\n");
                printf("+--------------------------------------\n");
            }
            else if( buf.val[ptr + 9] == IP_V4_PROTO) {
                //  Tunneled IP packet
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: Tunnel (IPv4/IPv4)\n");
                printf("+--------------------------------------\n");
                printf("|   IP Header Tunnel Layer 1: IPv4\n|   \n");

                tunneling_ipv4 = 1;
            }
            else if( buf.val[ptr + 9] == IP_V6_PROTO) {
                //  Tunneled IP packet
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: Tunnel (IPv4/IPv6)\n");
                printf("+--------------------------------------\n");
                printf("|   IP Header Tunnel Layer 1: IPv4\n|   \n");

                tunneling_ipv6 = 1;
            }
            else {
                //  Regular IP packet
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: IPv4\n");
                printf("+--------------------------------------\n");
            }
            ptr--;
            ptr--;

            display_class(buf, ptr);

            //
            // L3 Header parsing
            //
            printf("|   IPV4 Checksum: %h%h\n", buf.val[ptr-2], buf.val[ptr-1] );

            printf("|   IP SRC Address: %h.%h.%h.%h\n",
                 buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
            printf("|   IP DST Address: %h.%h.%h.%h\n",
                 buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );

            // Check if tunneling present
            if( tunneling_ipv4 ) {
                // IPv4/IPv4 Tunneling

                printf("|  -----------  \n|\n");
                printf("|   IP Header Tunnel Layer 2: IPv4:\n");
                printf("|   \n");

                ptr--;
                ptr--;

                display_class(buf, ptr);

                printf("|   IP SRC Address: %h.%h.%h.%h\n",
                     buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
                printf("|   IP DST Address: %h.%h.%h.%h\n",
                     buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );

            }
            else if( tunneling_ipv6) {
                // IPv4/IPv6 Tunneling

                printf("|  -----------  \n|\n");
                printf("|   IP Header Tunnel Layer 2: IPv6:\n");
                printf("|   \n");

                ptr--;
                ptr--;

                display_class_ipv6(buf, ptr);

                printf("|      Payload Len: 0x%h(%d)\n", buf.val[ptr++], buf.val[ptr++]);
                printf("|      Next Header: 0x%h\n", buf.val[ptr++]);
                printf("|      Hop Limit  : 0x%h\n", buf.val[ptr++]);
                printf("|   IP SRC Address: %h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h\n",
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
                printf("|   IP DST Address: %h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h\n",
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
            }


            //
            // L4 Header Parsing
            //

            // Determine location of protocol/next header field in buffer
            if( tunneling_ipv6 )
                // Tunnel layer 2 of hdr was IPv6
                buf_shift = 34;
            else
                buf_shift = 11;

            // Check Protocol field to see if it has a L4 Header
            if( buf.val[ptr - buf_shift ] == UDP_PROTO) {
                //  UDP L4 pkt present
                printf("+-------------------------------------\n");
                printf("   L4 Header-- Type: UDP  \n");
                printf("+--------------------------------------\n");
                printf("|     UDP SRC Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );
                printf("|     UDP DST Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );

                token = { buf.val[ptr + 4], buf.val[ptr + 5] };
            }
            else if( buf.val[ptr - buf_shift ] == TCP_PROTO) {
                //  TCP L4 pkt present
                printf("+-------------------------------------\n");
                printf("   L4 Header-- Type: TCP\n");
                printf("+--------------------------------------\n");

                printf("|     TCP SRC Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );
                printf("|     TCP DST Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );
                printf("|   TCP Sequence #: %h\n", {buf.val[ptr++], buf.val[ptr++],
                                                    buf.val[ptr++], buf.val[ptr++]} );
                printf("|        TCP ACK #: %h\n", {buf.val[ptr++], buf.val[ptr++],
                                                    buf.val[ptr++], buf.val[ptr++]} );

                // increment ptr to pass viewing of uncessary bits
                ptr += 1;

                flag_bit = buf.val[ptr++];

                printf("|    TCP Flag bits: URG:%b ACK:%b PSH:%b RST:%b SYN:%b FIN:%b\n",
                      flag_bit[5], flag_bit[4], flag_bit[3], flag_bit[2], flag_bit[1], flag_bit[0]);
                printf("|      Window Size: %h\n", {buf.val[ptr++], buf.val[ptr++]});
                printf("|      TCP Checksum: %h\n", {buf.val[ptr++], buf.val[ptr++]});
                printf("+---------------\n");

                token = { buf.val[ptr + 2], buf.val[ptr+3] };
                //token = { buf.val[ptr + 4], buf.val[ptr+5] };
            } // end else if
            else {
                // No L4 pkt present
                token = { buf.val[ptr], buf.val[ptr+1] };
            }
        } // end if (IPv4 pkt)
        else {

            // it is an IPv6 packet

            // Check Next Header field to see if it is an IPSec packet
            if( buf.val[ptr + 6] == AH_PROTO) {
                //  Authetication Header (AH) option present
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: IPv6, IPSec: AH\n");
                printf("+--------------------------------------\n");
            }
            else if( buf.val[ptr + 6] == ESP_PROTO) {
                //  Encapsulating Security Payload (ESP) option present
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: IPv6, IPSec: ESP\n");
                printf("+--------------------------------------\n");
            }
            else if( buf.val[ptr + 6] == IP_V4_PROTO) {
                //  Tunneled IP packet
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: Tunnel (IPv6/IPv4)\n");
                printf("+--------------------------------------\n");
                printf("|   IP Header Tunnel Layer 1: IPv6\n");
                printf("|   \n");

                tunneling_ipv4 = 1;
            }
            else if( buf.val[ptr + 6] == IP_V6_PROTO) {
                //  Tunneld IP packet
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: Tunnel (IPv6/IPv6)\n");
                printf("+--------------------------------------\n");
                printf("|   IP Header Tunnel Layer 1: IPv6\n");
                printf("|   \n");

                tunneling_ipv6 = 1;
            }
            else {
                //  Regular IP packet
                printf("+-------------------------------------\n");
                printf("   L3 Header-- Type: IPv6\n");
                printf("+--------------------------------------\n");
            }
            ptr--;
            ptr--;

            display_class_ipv6(buf, ptr);

            printf("|      Payload Len: 0x%h(%d)\n", buf.val[ptr++], buf.val[ptr++]);
            printf("|      Next Header: 0x%h\n", buf.val[ptr++]);
            printf("|      Hop Limit  : 0x%h\n", buf.val[ptr++]);
            printf("|   IP SRC Address: %h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h\n",
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
            printf("|   IP DST Address: %h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h\n",
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                    buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );

            // Check if tunneling present
            if( tunneling_ipv4 ) {
                // IPv6/IPv4 Tunneling

                printf("|  -----------  \n|\n");
                printf("|   IP Header Tunnel Layer 2: IPv4:\n");
                printf("|   \n");

                ptr--;
                ptr--;

                display_class(buf, ptr);

                printf("|   IP SRC Address: %h.%h.%h.%h\n",
                       buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
                printf("|   IP DST Address: %h.%h.%h.%h\n",
                       buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );

            }
            else if( tunneling_ipv6) {
                // IPv6/IPv6 Tunneling

                printf("|  -----------  \n|\n");
                printf("|   IP Header Tunnel Layer 2: IPv6:\n");
                printf("|   \n");

                ptr--;
                ptr--;

                display_class_ipv6(buf, ptr);

                printf("|      Payload Len: 0x%h(%d)\n", buf.val[ptr++], buf.val[ptr++]);
                printf("|      Next Header: 0x%h\n", buf.val[ptr++]);
                printf("|      Hop Limit  : 0x%h\n", buf.val[ptr++]);
                printf("|   IP SRC Address: %h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h\n",
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
                printf("|   IP DST Address: %h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h:%h%h\n",
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++],
                        buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] );
            }

            //
            // L4 Header Parsing
            //

            // Determine location of protocol/next header field in buffer
            if( tunneling_ipv4 )
                // Tunnel layer 2 of hdr was IPv4
                buf_shift = 11;
            else
                buf_shift = 34;

            if( buf.val[ptr - buf_shift ] == UDP_PROTO) {
                //  UDP L4 pkt present

                printf("+-------------------------------------\n");
                printf("   L4 Header-- Type: UDP  \n");
                printf("+--------------------------------------\n");
                printf("|     UDP SRC Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );
                printf("|     UDP DST Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );

                token = { buf.val[ptr + 4], buf.val[ptr+5] };
            }
            else if( buf.val[ptr - buf_shift ] == TCP_PROTO) {
                //  TCP L4 pkt present
                printf("+-------------------------------------\n");
                printf("   L4 Header-- Type: TCP\n");
                printf("+--------------------------------------\n");

                printf("|     TCP SRC Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );
                printf("|     TCP DST Port: %h\n", {buf.val[ptr++], buf.val[ptr++]} );
                printf("|   TCP Sequence #: %h\n", {buf.val[ptr++], buf.val[ptr++],
                                                    buf.val[ptr++], buf.val[ptr++]} );
                printf("|        TCP ACK #: %h\n", {buf.val[ptr++], buf.val[ptr++],
                                                    buf.val[ptr++], buf.val[ptr++]} );

                // increment ptr to pass viewing of uncessary bits
                ptr += 1;

                flag_bit = buf.val[ptr++];

                printf("|    TCP Flag bits: URG:%b ACK:%b PSH:%b RST:%b SYN:%b FIN:%b\n",
                      flag_bit[5], flag_bit[4], flag_bit[3], flag_bit[2], flag_bit[1], flag_bit[0]);
                printf("|      Window Size: %h\n", {buf.val[ptr++], buf.val[ptr++]});
                printf("+---------------\n");

                token = { buf.val[ptr + 4], buf.val[ptr+5] };

            } // end else if TCP pkt
            else {
                // No L4 pkt present
                token = { buf.val[ptr], buf.val[ptr+1] };
            }
        } // end else (IPv6 Pkt)
    } // end if L3 Header Present


    if(len<0)   len = hwlen;

    printf("\nTime: %0d\n",{get_time(HI),get_time(LO)});
    printf("Token: %0d\n", token);

    // See if packet (Token) exists in DB
    if( assoc_index(CHECK, pack_db, token) == 0 ) {
        printf("Warning: Could Not find Packet in Packet Database\n");
    } else {
        printf("Packet originated on Port: %0d\n",  pack_db[token].org_port );
    }

    // Display Data payload portion of packet
    printf("\n");
    if(ifedx==1)  display_data(buf, ptr, hwlen-ptr-4-4 );
    else          display_data(buf, ptr, hwlen-ptr-4 );

    printf("\n");
    printf("CRC: %h\n", { buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] } );

    if(ifedx==1)
        printf("\n INTER FEDX CRC: %h\n",
             { buf.val[ptr++], buf.val[ptr++], buf.val[ptr++], buf.val[ptr++] } );

    printf("\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n");
    printf("--------------------------------------------------------------\n\n");

} // end task


task display_class(byte_array buf, var integer ptr) {
    integer n,last;

    last = ptr+14;

    printf("|              Class: ");

    // Hex Dump
    for(n=0;n<14;n++)   printf("%h ", buf.val[ptr+n] );
    printf("\n");

    if( {buf.val[ptr], buf.val[ptr+1]} < 16'h0600)
        printf("|             Length: %0d\n|\n", {buf.val[ptr++], buf.val[ptr++]} );
    else
        printf("|               Type: %0h\n|\n", {buf.val[ptr++], buf.val[ptr++]} );

    ptr=last;
}


task display_class_ipv6(byte_array buf, var integer ptr) {
    integer n,last;

    last = ptr+6;

    printf("|              Class: ");

    // Hex Dump
    for(n=0;n<10;n++)       printf("%h ", buf.val[ptr+n] );
    printf("\n");

    if( {buf.val[ptr], buf.val[ptr+1]} < 16'h0600)
        printf("|             Length: %0d\n|\n", {buf.val[ptr++], buf.val[ptr++]} );
    else
        printf("|               Type: %0h\n|\n", {buf.val[ptr++], buf.val[ptr++]} );

    ptr=last;
}


task display_data(byte_array buf, var integer ptr, integer len) {
    integer n;

    printf("    Data:\n");
    printf("+---------------");

    if(len<1)
        printf("\n| No Payload ...");
    else

    for(n=0;n< len ;n++) {
        if( !(n % 16) ) printf("\n| %d: ",n);
        printf("%h ", buf.val[ptr++]);
    }
    printf("\n+---------------\n");
}


task display_id(bit [79:0] id) {

    printf("    ID Tags:\n");
    printf("+---------------\n");
    printf("|       Src port: %0d\n", id[79:75] );
    printf("|       Dst port: %0h\n", id[74:35] );
    printf("|     Order Type: %0h\n", id[34:33] );
    printf("|  Order Sequnce: %0d\n", id[32:27] );
    printf("|  Packet number: %0d\n", id[26:11] );
    printf("|      Data Type: %0d\n", id[10:8] );
    printf("|      Data Seed: %0d\n", id[7:0] );
    printf("+---------------\n");
}


task display_db(integer token) {

    printf("\n========== Display DB Entry %0d ========== \n",token);
    if(pack_db[token] == null) {
        printf("This entry is not allocated ...\n");
    } else {
        printf("\tframe.frame_type:  %h\n",pack_db[token].frame.frame_type);
        printf("\tframe.frame_class: %h\n",pack_db[token].frame.frame_class);
        printf("\tframe.class_mask:  %h\n",pack_db[token].frame.class_mask);
        printf("\tframe.class_funct: %h\n",pack_db[token].frame.class_funct);
        printf("\tframe.data_type:   %h\n",pack_db[token].frame.data_type);
        printf("\tframe.data_seed:   %h\n",pack_db[token].frame.data_seed);
        printf("\tframe.data_length: %h\n",pack_db[token].data_length);
        printf("\n");
        printf("\tsrc_node.l2_addr: %h\n",pack_db[token].src_node.l2_addr);
        printf("\tsrc_node.tci:     %h\n",pack_db[token].src_node.tci);
        printf("\tsrc_node.ip_addr: %h\n",pack_db[token].src_node.ip_addr);
        printf("\tsrc_node.ipv6_addr: %h\n",pack_db[token].src_node.ipv6_addr);
        printf("\n");
        printf("\tdst_node.l2_addr: %h\n",pack_db[token].dst_node.l2_addr);
        printf("\tdst_node.tci:     %h\n",pack_db[token].dst_node.tci);
        printf("\tdst_node.ip_addr: %h\n",pack_db[token].dst_node.ip_addr);
        printf("\tdst_node.ipv6_addr: %h\n",pack_db[token].dst_node.ipv6_addr);
        printf("\n");
        printf("\ttup.src_tcp_udp_port: %h\n",pack_db[token].tup.src_tcp_udp_port);
        printf("\ttup.dst_tcp_udp_port: %h\n",pack_db[token].tup.dst_tcp_udp_port);
        printf("\n");
        printf("\trcv_isn: %0h\n",pack_db[token].rx_param.rcv_isn);
        printf("\tlast_ackno: %0h\n",pack_db[token].rx_param.last_ackno);
        printf("\tadv_isn: %0h\n",pack_db[token].tx_param.adv_isn);
        printf("\tlast_seqno: %0h\n",pack_db[token].tx_param.last_seqno);
        printf("\n");
        printf("\torg_port:  %0d\n",pack_db[token].org_port);
        printf("\torder_seq: %0d\n",pack_db[token].order_seq);
        printf("\tpckt_num:  %0d\n",pack_db[token].pckt_num);
        printf("\toptions:   %h\n",pack_db[token].options);
    }
    printf("========================================== \n\n");
}

task display_flow(integer flow_id) {

    printf("\n========== Display FLOW DB Entry %0d ========== \n",flow_id);
    if(flow_db[flow_id] == null) {
        printf("This entry is not allocated ...\n");
    } else {
        printf("\tframe.data_length: %h\n",flow_db[flow_id].data_length);
        printf("\n");
        printf("\ttup.src_tcp_udp_port: %h\n",flow_db[flow_id].tup.src_tcp_udp_port);
        printf("\ttup.dst_tcp_udp_port: %h\n",flow_db[flow_id].tup.dst_tcp_udp_port);
        printf("\n");
        printf("\torg_port:  %0d\n",flow_db[flow_id].org_port);
        printf("\trcv_isn: %0h\n",flow_db[flow_id].rx_param.rcv_isn);
        printf("\tlast_ackno: %0h\n",flow_db[flow_id].rx_param.last_ackno);
        printf("\tadv_isn: %0h\n",flow_db[flow_id].tx_param.adv_isn);
        printf("\tlast_seqno: %0h\n",flow_db[flow_id].tx_param.last_seqno);
        //printf("\tpckt_num:  %0d\n",pack_db[token].pckt_num);
        //printf("\toptions:   %h\n",pack_db[token].options);
    }
    printf("========================================== \n\n");
}