decode_napster.c

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/*
 * decode_napster.c
 *
 * Napster. w00w00!
 *
 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
 *
 * $Id: decode_napster.c,v 1.6 2001/03/15 08:33:01 dugsong Exp $
 */
 
#include "config.h"
 
#include <sys/types.h>
 
#include <stdio.h>
#include <string.h>
 
#include "buf.h"
#include "decode.h"
 
int
decode_napster(u_char *buf, int len, u_char *obuf, int olen)
{
    struct buf inbuf, outbuf;
    u_short i, type;
 
    buf_init(&inbuf, buf, len);
    buf_init(&outbuf, obuf, olen);
 
    if (buf_get(&inbuf, &i, sizeof(i)) != sizeof(i))
        return (0);
 
    i = pletohs(&i);
 
    if (buf_get(&inbuf, &type, sizeof(type)) != sizeof(type))
        return (0);
 
    type = pletohs(&type);
 
    if (type != 2 || i > buf_len(&inbuf))
        return (0);
    
    buf_put(&outbuf, buf_ptr(&inbuf), i);
    buf_put(&outbuf, "\n", 1);
    
    buf_end(&outbuf);
    
    return (buf_len(&outbuf));
}