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/*
* decode_snmp.c
*
* Simple Network Management Protocol.
*
* Copyright (c) 2000 Dug Song <dugsong@monkey.org>
*
* $Id: decode_snmp.c,v 1.6 2001/03/15 08:33:02 dugsong Exp $
*/
#include "config.h"
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "buf.h"
#include "asn1.h"
#include "decode.h"
int
decode_snmp(u_char *buf, int len, u_char *obuf, int olen)
{
struct buf *b, inbuf, outbuf;
u_char *p, vers;
int i;
buf_init(&inbuf, buf, len);
buf_init(&outbuf, obuf, olen);
if (asn1_type(&inbuf) != ASN1_SEQUENCE)
return (0);
asn1_len(&inbuf); /* XXX - skip sequence length */
if (asn1_type(&inbuf) != ASN1_INTEGER)
return (0);
if (asn1_len(&inbuf) != 1) /* XXX - check version length */
return (0);
buf_get(&inbuf, &vers, sizeof(vers));
if (asn1_type(&inbuf) != ASN1_STRING)
return (0);
i = asn1_len(&inbuf);
b = buf_tok(&inbuf, NULL, i);
p = buf_strdup(b);
buf_putf(&outbuf, "[version %d]\n%s\n", vers + 1, p);
free(p);
buf_end(&outbuf);
return (buf_len(&outbuf));
}
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