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/* 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
#define SMUX_PORT_DEFAULT 199
#define SMUXMAXPKTSIZE 1500
#define SMUXMAXSTRLEN 256
#define SMUX_OPEN (ASN_APPLICATION | ASN_CONSTRUCTOR | 0)
#define SMUX_CLOSE (ASN_APPLICATION | ASN_PRIMITIVE | 1)
#define SMUX_RREQ (ASN_APPLICATION | ASN_CONSTRUCTOR | 2)
#define SMUX_RRSP (ASN_APPLICATION | ASN_PRIMITIVE | 3)
#define SMUX_SOUT (ASN_APPLICATION | ASN_PRIMITIVE | 4)
#define SMUX_GET (ASN_CONTEXT | ASN_CONSTRUCTOR | 0)
#define SMUX_GETNEXT (ASN_CONTEXT | ASN_CONSTRUCTOR | 1)
#define SMUX_GETRSP (ASN_CONTEXT | ASN_CONSTRUCTOR | 2)
#define SMUX_SET (ASN_CONTEXT | ASN_CONSTRUCTOR | 3)
#define SMUX_TRAP (ASN_CONTEXT | ASN_CONSTRUCTOR | 4)
#define SMUX_MAX_FAILURE 3
/* 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)
struct variable;
#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))
typedef int (WriteMethod)(int action,
u_char *var_val,
u_char var_val_type,
size_t var_val_len,
u_char *statP,
oid *name,
size_t length,
struct variable *v);
typedef u_char *(FindVarMethod)(struct variable *v,
oid *name,
size_t *length,
int exact,
size_t *var_len,
WriteMethod **write_method);
/* SNMP variable */
struct variable
{
/* Index of the MIB.*/
u_char magic;
/* Type of variable. */
char type;
/* Access control list. */
u_short acl;
/* Callback function. */
FindVarMethod *findVar;
/* Suffix of the MIB. */
int namelen;
oid name[MAX_OID_LEN];
};
/* SNMP tree. */
struct subtree
{
/* Tree's oid. */
oid name[MAX_OID_LEN];
u_char name_len;
/* List of the variables. */
struct variable *variables;
/* Length of the variables list. */
int variables_num;
/* Width of the variables list. */
int variables_width;
/* Registered flag. */
int registered;
};
struct trap_object
{
FindVarMethod *findVar;
int namelen;
oid name[MAX_OID_LEN];
};
/* Declare SMUX return value. */
#define SNMP_LOCAL_VARIABLES \
static int32_t snmp_int_val; \
static struct in_addr snmp_in_addr_val;
#define SNMP_INTEGER(V) \
( \
*var_len = sizeof (int32_t), \
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_start (void);
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 (oid *, size_t, oid *, size_t, struct trap_object *,
size_t, unsigned int, u_char);
extern int oid_compare (oid *, int, oid *, int);
extern void oid2in_addr (oid [], int, struct in_addr *);
extern void *oid_copy (void *, void *, size_t);
extern void oid_copy_addr (oid [], struct in_addr *, int);
#endif /* _ZEBRA_SNMP_H */
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