/*
 *
 * Copyright (c) 2007-2016 The University of Waikato, Hamilton, New Zealand.
 * All rights reserved.
 *
 * This file is part of libtrace.
 *
 * This code has been developed by the University of Waikato WAND
 * research group. For further information please see http://www.wand.net.nz/
 *
 * libtrace 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 3 of the License, or
 * (at your option) any later version.
 *
 * libtrace 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 program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <ctype.h>
#include "libpacketdump.h"

#define WIDTH 16

/* This is an example of a decoder for a protocol that we know exists, but is
 * undocumented. We dump the protocol as hex, and then skip onto the next header
 * which we do know exists.
 */

DLLEXPORT void decode(int link_type UNUSED, const char *packet, unsigned len)
{
    unsigned int i = 0;
    printf(" Ubiquity:");
    for (i = 0; i < 132; /* Nothing */) {
        unsigned int j;
        printf("\n ");
        for (j = 0; j < WIDTH; j++) {
            if (i + j < len)
                printf(" %02x", (unsigned char)packet[i + j]);
            else
                printf("   ");
        }
        printf("    ");
        for (j = 0; j < WIDTH; j++) {
            if (i + j < len)
                if (isprint((unsigned char)packet[i + j]))
                    printf("%c", (unsigned char)packet[i + j]);
                else
                    printf(".");
            else
                printf("   ");
        }
        if (i + WIDTH > len)
            break;
        else
            i += WIDTH;
    }
    printf("\n");
    if (len > 132)
        decode_next(packet + 132, len - 132, "link", 4);
    return;
}
