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/*
* Copyright (c) 2005, Nate Nielsen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*
* CONTRIBUTORS
* Nate Nielsen <nielsen@memberwebs.com>
*
*/
#include "usuals.h"
#include <errno.h>
#include <syslog.h>
#include <bsnmp/asn1.h>
#include <bsnmp/snmp.h>
#include "rrdbotd.h"
/* Whether we print warnings when loading MIBs or not */
extern int g_mib_warnings;
extern const char* g_mib_directory;
static int
parse_mixed_mib(const char* mib, struct asn_oid* oid)
{
mib_node n;
int ret = 0;
unsigned int sub;
char* next;
char* t;
char* copy;
char* src;
memset(oid, 0, sizeof(*oid));
copy = strdup(mib);
if(!copy)
{
errno = ENOMEM;
return -1;
}
for(src = copy; src && *src; src = next)
{
next = strchr(src, '.');
if(next)
{
*next = 0;
next++;
}
sub = strtoul(src, &t, 10);
/* An invalid number, try getting a named MIB */
if(*t || sub < 0)
{
/* Only initializes first time around */
rb_mib_init(g_mib_directory, g_mib_warnings);
/*
* If we haven't parsed anything yet, try a symbolic
* search for root
*/
if(oid->len == 0)
{
n = rb_mib_lookup(src);
if(n)
{
/* That took care of it */
rb_mib_oid(n, oid);
continue;
}
}
/* Try a by name search for sub item */
n = rb_mib_node(oid);
if(n == NULL)
sub = -1;
else
sub = rb_mib_subid(n, src);
}
/* Make sure this is a valid part */
if(sub < 0 || (oid->len == 0 && sub < 1) || sub >= ASN_MAXID)
ret = -1;
/* Too many parts */
if(oid->len > ASN_MAXOIDLEN)
ret = -1;
if(ret < 0)
break;
oid->subs[oid->len] = sub;
oid->len++;
}
free(copy);
return ret;
}
int
rb_snmp_parse_mib(const char* mib, struct snmp_value* value)
{
int ret;
mib_node n;
value->syntax = SNMP_SYNTAX_NULL;
memset(&(value->v), 0, sizeof(value->v));
/* An initial dot */
if(*mib == '.')
mib++;
/*
* First try parsing a numeric OID. This will fall
* back to mixed mode MIB's if necassary. Allows us
* to avoid loading all the MIB files when not
* necessary
*/
ret = parse_mixed_mib(mib, &(value->var));
/* Next try a symolic search */
if(ret == -1)
{
rb_mib_init(g_mib_directory, g_mib_warnings);
n = rb_mib_lookup(mib);
if(n == NULL)
return -1;
rb_mib_oid(n, &(value->var));
return 0;
}
return ret;
}
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