/* SNMP support
 * Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra 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 2, or (at your option) any
 * later version.
 *
 * GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.  
 */

#ifndef _ZEBRA_SNMP_H
#define _ZEBRA_SNMP_H

#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/agent/snmp_vars.h>

/* Structures here are mostly compatible with UCD SNMP 4.1.1 */
#define MATCH_FAILED     (-1)
#define MATCH_SUCCEEDED  0

/* SYNTAX TruthValue from SNMPv2-TC. */
#define SNMP_TRUE  1
#define SNMP_FALSE 2

/* SYNTAX RowStatus from SNMPv2-TC. */
#define SNMP_VALID  1
#define SNMP_INVALID 2

#define IN_ADDR_SIZE sizeof(struct in_addr)

#undef REGISTER_MIB
#define REGISTER_MIB(descr, var, vartype, theoid)		\
    smux_register_mib(descr, (struct variable *)var, sizeof(struct vartype), \
    sizeof(var)/sizeof(struct vartype),			\
    theoid, sizeof(theoid)/sizeof(oid))

struct trap_object
{
  int namelen; /* Negative if the object is not indexed */
  oid name[MAX_OID_LEN];
};

/* Declare SMUX return value. */
#define SNMP_LOCAL_VARIABLES \
  static long snmp_int_val; \
  static struct in_addr snmp_in_addr_val;

#define SNMP_INTEGER(V) \
  ( \
    *var_len = sizeof (snmp_int_val), \
    snmp_int_val = V, \
    (u_char *) &snmp_int_val \
  )

#define SNMP_IPADDRESS(V) \
  ( \
    *var_len = sizeof (struct in_addr), \
    snmp_in_addr_val = V, \
    (u_char *) &snmp_in_addr_val \
  )

extern void smux_init (struct thread_master *tm);
extern void smux_register_mib(const char *, struct variable *, 
                              size_t, int, oid [], size_t);
extern int smux_header_generic (struct variable *, oid [], size_t *, 
                                int, size_t *, WriteMethod **);
extern int smux_trap (const oid *, size_t, const oid *, size_t, 
		      const struct trap_object *, 
                      size_t, u_char);

extern int oid_compare (oid *, int, oid *, int);
extern void oid2in_addr (oid [], int, struct in_addr *);
extern void *oid_copy (void *, const void *, size_t);
extern void oid_copy_addr (oid [], struct in_addr *, int);

#endif /* _ZEBRA_SNMP_H */