/*
 * (C) 2007-18 - ntop.org and contributors
 *
 * 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; either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>
 *
 */

#include "n2n_wire.h"
#include "n2n_transforms.h"
#include "n2n.h"

#include <sys/time.h>
#include <time.h>
#include <string.h>
#include <stdio.h>

uint8_t PKT_CONTENT[]={
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
    0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 };

/* Prototypes */
static ssize_t do_encode_packet( uint8_t * pktbuf, size_t bufsize, const n2n_community_t c );

int main( int argc, char * argv[] )
{
    uint8_t pktbuf[N2N_PKT_BUF_SIZE];
    n2n_trans_op_t transop_null;

    n2n_common_t cmn;
    n2n_PACKET_t pkt;
    n2n_community_t c;

    struct timeval t1;
    struct timeval t2;

    size_t i;
    size_t n;
    size_t idx;
    size_t rem;
    ssize_t nw;
    ssize_t tdiff;

    transop_null_init( &transop_null );
    memset(c,0,sizeof(N2N_COMMUNITY_SIZE));

    n=10000;
    memcpy( c, "abc123def456", 12 );

    gettimeofday( &t1, NULL );
    for(i=0; i<n; ++i)
    {
        nw = do_encode_packet( pktbuf, N2N_PKT_BUF_SIZE, c);

        nw += transop_null.fwd( &transop_null,
            pktbuf+nw, N2N_PKT_BUF_SIZE-nw,
            PKT_CONTENT, sizeof(PKT_CONTENT) );

        idx=0;
        rem=nw;

        decode_common( &cmn, pktbuf, &rem, &idx);
        decode_PACKET( &pkt, &cmn, pktbuf, &rem, &idx );

        if ( 0 == (i%1000) )
        {
            fprintf(stderr,".");
        }
    }
    gettimeofday( &t2, NULL );

    tdiff = ((t2.tv_sec - t1.tv_sec) * 1000000) + (t2.tv_usec - t1.tv_usec);

    fprintf( stderr, "\nrun %u times. (%u -> %u nsec each) %u.%06u -> %u.%06u.\n", i, tdiff, (tdiff *1000)/i, (uint32_t)t1.tv_sec, (uint32_t)t1.tv_usec, (uint32_t)t2.tv_sec, (uint32_t)t2.tv_usec );

    return 0;
}

static ssize_t do_encode_packet( uint8_t * pktbuf, size_t bufsize, const n2n_community_t c )
{
    n2n_mac_t destMac={0,1,2,3,4,5};
    n2n_common_t cmn;
    n2n_PACKET_t pkt;
    size_t idx;


    memset( &cmn, 0, sizeof(cmn) );
    cmn.ttl = N2N_DEFAULT_TTL;
    cmn.pc = n2n_packet;
    cmn.flags=0; /* no options, not from supernode, no socket */
    memcpy( cmn.community, c, N2N_COMMUNITY_SIZE );

    memset( &pkt, 0, sizeof(pkt) );
    memcpy( pkt.srcMac, destMac, N2N_MAC_SIZE);
    memcpy( pkt.dstMac, destMac, N2N_MAC_SIZE);

    pkt.sock.family=0; /* do not encode sock */

    idx=0;
    encode_PACKET( pktbuf, &idx, &cmn, &pkt );
    traceEvent( TRACE_DEBUG, "encoded PACKET header of size=%u", (unsigned int)idx );
    
    return idx;
}