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/**
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* @file
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* SNMP Agent message handling structures.
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*/
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/*
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* Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Christiaan Simons <christiaan.simons@axon.tv>
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*/
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#ifndef __LWIP_SNMP_MSG_H__
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#define __LWIP_SNMP_MSG_H__
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#include "lwip/opt.h"
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#include "lwip/snmp.h"
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#include "lwip/snmp_structs.h"
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#include "lwip/ip_addr.h"
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#include "lwip/err.h"
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#if LWIP_SNMP
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#if SNMP_PRIVATE_MIB
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/* When using a private MIB, you have to create a file 'private_mib.h' that contains
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* a 'struct mib_array_node mib_private' which contains your MIB. */
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#include "private_mib.h"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* The listen port of the SNMP agent. Clients have to make their requests to
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this port. Most standard clients won't work if you change this! */
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#ifndef SNMP_IN_PORT
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#define SNMP_IN_PORT 161
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#endif
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/* The remote port the SNMP agent sends traps to. Most standard trap sinks won't
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work if you change this! */
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#ifndef SNMP_TRAP_PORT
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#define SNMP_TRAP_PORT 162
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#endif
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#define SNMP_ES_NOERROR 0
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#define SNMP_ES_TOOBIG 1
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#define SNMP_ES_NOSUCHNAME 2
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#define SNMP_ES_BADVALUE 3
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#define SNMP_ES_READONLY 4
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#define SNMP_ES_GENERROR 5
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#define SNMP_GENTRAP_COLDSTART 0
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#define SNMP_GENTRAP_WARMSTART 1
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#define SNMP_GENTRAP_AUTHFAIL 4
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#define SNMP_GENTRAP_ENTERPRISESPC 6
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struct snmp_varbind
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{
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/* next pointer, NULL for last in list */
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struct snmp_varbind *next;
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/* previous pointer, NULL for first in list */
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struct snmp_varbind *prev;
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/* object identifier length (in s32_t) */
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u8_t ident_len;
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/* object identifier array */
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s32_t *ident;
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/* object value ASN1 type */
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u8_t value_type;
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/* object value length (in u8_t) */
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u8_t value_len;
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/* object value */
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void *value;
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/* encoding varbind seq length length */
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u8_t seqlenlen;
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/* encoding object identifier length length */
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u8_t olenlen;
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/* encoding object value length length */
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u8_t vlenlen;
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/* encoding varbind seq length */
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u16_t seqlen;
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/* encoding object identifier length */
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u16_t olen;
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/* encoding object value length */
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u16_t vlen;
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};
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struct snmp_varbind_root
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{
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struct snmp_varbind *head;
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struct snmp_varbind *tail;
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/* number of variable bindings in list */
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u8_t count;
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/* encoding varbind-list seq length length */
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u8_t seqlenlen;
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/* encoding varbind-list seq length */
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u16_t seqlen;
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};
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/** output response message header length fields */
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struct snmp_resp_header_lengths
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{
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/* encoding error-index length length */
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u8_t erridxlenlen;
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/* encoding error-status length length */
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u8_t errstatlenlen;
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/* encoding request id length length */
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u8_t ridlenlen;
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/* encoding pdu length length */
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u8_t pdulenlen;
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/* encoding community length length */
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u8_t comlenlen;
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/* encoding version length length */
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u8_t verlenlen;
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/* encoding sequence length length */
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u8_t seqlenlen;
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/* encoding error-index length */
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u16_t erridxlen;
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/* encoding error-status length */
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u16_t errstatlen;
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/* encoding request id length */
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u16_t ridlen;
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/* encoding pdu length */
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u16_t pdulen;
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/* encoding community length */
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u16_t comlen;
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/* encoding version length */
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u16_t verlen;
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/* encoding sequence length */
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u16_t seqlen;
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};
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/** output response message header length fields */
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struct snmp_trap_header_lengths
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{
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/* encoding timestamp length length */
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u8_t tslenlen;
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/* encoding specific-trap length length */
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u8_t strplenlen;
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/* encoding generic-trap length length */
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u8_t gtrplenlen;
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/* encoding agent-addr length length */
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u8_t aaddrlenlen;
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/* encoding enterprise-id length length */
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u8_t eidlenlen;
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/* encoding pdu length length */
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u8_t pdulenlen;
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/* encoding community length length */
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u8_t comlenlen;
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/* encoding version length length */
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u8_t verlenlen;
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/* encoding sequence length length */
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u8_t seqlenlen;
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/* encoding timestamp length */
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u16_t tslen;
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/* encoding specific-trap length */
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u16_t strplen;
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/* encoding generic-trap length */
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u16_t gtrplen;
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/* encoding agent-addr length */
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u16_t aaddrlen;
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188
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/* encoding enterprise-id length */
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u16_t eidlen;
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/* encoding pdu length */
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u16_t pdulen;
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/* encoding community length */
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u16_t comlen;
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194
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/* encoding version length */
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u16_t verlen;
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196
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/* encoding sequence length */
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u16_t seqlen;
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198
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};
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199
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200
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/* Accepting new SNMP messages. */
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201
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#define SNMP_MSG_EMPTY 0
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202
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/* Search for matching object for variable binding. */
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203
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#define SNMP_MSG_SEARCH_OBJ 1
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204
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/* Perform SNMP operation on in-memory object.
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205
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Pass-through states, for symmetry only. */
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206
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#define SNMP_MSG_INTERNAL_GET_OBJDEF 2
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#define SNMP_MSG_INTERNAL_GET_VALUE 3
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208
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#define SNMP_MSG_INTERNAL_SET_TEST 4
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#define SNMP_MSG_INTERNAL_GET_OBJDEF_S 5
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#define SNMP_MSG_INTERNAL_SET_VALUE 6
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211
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/* Perform SNMP operation on object located externally.
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212
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In theory this could be used for building a proxy agent.
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213
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Practical use is for an enterprise spc. app. gateway. */
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#define SNMP_MSG_EXTERNAL_GET_OBJDEF 7
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#define SNMP_MSG_EXTERNAL_GET_VALUE 8
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216
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#define SNMP_MSG_EXTERNAL_SET_TEST 9
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#define SNMP_MSG_EXTERNAL_GET_OBJDEF_S 10
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#define SNMP_MSG_EXTERNAL_SET_VALUE 11
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219
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220
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#define SNMP_COMMUNITY_STR_LEN 64
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221
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struct snmp_msg_pstat
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222
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{
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223
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/* lwIP local port (161) binding */
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224
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struct udp_pcb *pcb;
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225
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/* source IP address */
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226
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ip_addr_t sip;
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227
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/* source UDP port */
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228
|
u16_t sp;
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229
|
/* request type */
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230
|
u8_t rt;
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231
|
/* request ID */
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232
|
s32_t rid;
|
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233
|
/* error status */
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234
|
s32_t error_status;
|
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0:58c3d014a4e7
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235
|
/* error index */
|
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|
236
|
s32_t error_index;
|
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237
|
/* community name (zero terminated) */
|
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238
|
u8_t community[SNMP_COMMUNITY_STR_LEN + 1];
|
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239
|
/* community string length (exclusive zero term) */
|
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|
240
|
u8_t com_strlen;
|
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|
241
|
/* one out of MSG_EMPTY, MSG_DEMUX, MSG_INTERNAL, MSG_EXTERNAL_x */
|
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|
242
|
u8_t state;
|
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0:58c3d014a4e7
|
243
|
/* saved arguments for MSG_EXTERNAL_x */
|
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|
244
|
struct mib_external_node *ext_mib_node;
|
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|
245
|
struct snmp_name_ptr ext_name_ptr;
|
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0:58c3d014a4e7
|
246
|
struct obj_def ext_object_def;
|
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|
247
|
struct snmp_obj_id ext_oid;
|
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0:58c3d014a4e7
|
248
|
/* index into input variable binding list */
|
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0:58c3d014a4e7
|
249
|
u8_t vb_idx;
|
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0:58c3d014a4e7
|
250
|
/* ptr into input variable binding list */
|
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0:58c3d014a4e7
|
251
|
struct snmp_varbind *vb_ptr;
|
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0:58c3d014a4e7
|
252
|
/* list of variable bindings from input */
|
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0:58c3d014a4e7
|
253
|
struct snmp_varbind_root invb;
|
| slowness |
0:58c3d014a4e7
|
254
|
/* list of variable bindings to output */
|
| slowness |
0:58c3d014a4e7
|
255
|
struct snmp_varbind_root outvb;
|
| slowness |
0:58c3d014a4e7
|
256
|
/* output response lengths used in ASN encoding */
|
| slowness |
0:58c3d014a4e7
|
257
|
struct snmp_resp_header_lengths rhl;
|
| slowness |
0:58c3d014a4e7
|
258
|
};
|
| slowness |
0:58c3d014a4e7
|
259
|
|
| slowness |
0:58c3d014a4e7
|
260
|
struct snmp_msg_trap
|
| slowness |
0:58c3d014a4e7
|
261
|
{
|
| slowness |
0:58c3d014a4e7
|
262
|
/* lwIP local port (161) binding */
|
| slowness |
0:58c3d014a4e7
|
263
|
struct udp_pcb *pcb;
|
| slowness |
0:58c3d014a4e7
|
264
|
/* destination IP address in network order */
|
| slowness |
0:58c3d014a4e7
|
265
|
ip_addr_t dip;
|
| slowness |
0:58c3d014a4e7
|
266
|
|
| slowness |
0:58c3d014a4e7
|
267
|
/* source enterprise ID (sysObjectID) */
|
| slowness |
0:58c3d014a4e7
|
268
|
struct snmp_obj_id *enterprise;
|
| slowness |
0:58c3d014a4e7
|
269
|
/* source IP address, raw network order format */
|
| slowness |
0:58c3d014a4e7
|
270
|
u8_t sip_raw[4];
|
| slowness |
0:58c3d014a4e7
|
271
|
/* generic trap code */
|
| slowness |
0:58c3d014a4e7
|
272
|
u32_t gen_trap;
|
| slowness |
0:58c3d014a4e7
|
273
|
/* specific trap code */
|
| slowness |
0:58c3d014a4e7
|
274
|
u32_t spc_trap;
|
| slowness |
0:58c3d014a4e7
|
275
|
/* timestamp */
|
| slowness |
0:58c3d014a4e7
|
276
|
u32_t ts;
|
| slowness |
0:58c3d014a4e7
|
277
|
/* list of variable bindings to output */
|
| slowness |
0:58c3d014a4e7
|
278
|
struct snmp_varbind_root outvb;
|
| slowness |
0:58c3d014a4e7
|
279
|
/* output trap lengths used in ASN encoding */
|
| slowness |
0:58c3d014a4e7
|
280
|
struct snmp_trap_header_lengths thl;
|
| slowness |
0:58c3d014a4e7
|
281
|
};
|
| slowness |
0:58c3d014a4e7
|
282
|
|
| slowness |
0:58c3d014a4e7
|
283
|
/** Agent Version constant, 0 = v1 oddity */
|
| slowness |
0:58c3d014a4e7
|
284
|
extern const s32_t snmp_version;
|
| slowness |
0:58c3d014a4e7
|
285
|
/** Agent default "public" community string */
|
| slowness |
0:58c3d014a4e7
|
286
|
extern const char snmp_publiccommunity[7];
|
| slowness |
0:58c3d014a4e7
|
287
|
|
| slowness |
0:58c3d014a4e7
|
288
|
extern struct snmp_msg_trap trap_msg;
|
| slowness |
0:58c3d014a4e7
|
289
|
|
| slowness |
0:58c3d014a4e7
|
290
|
/** Agent setup, start listening to port 161. */
|
| slowness |
0:58c3d014a4e7
|
291
|
void snmp_init(void);
|
| slowness |
0:58c3d014a4e7
|
292
|
void snmp_trap_dst_enable(u8_t dst_idx, u8_t enable);
|
| slowness |
0:58c3d014a4e7
|
293
|
void snmp_trap_dst_ip_set(u8_t dst_idx, ip_addr_t *dst);
|
| slowness |
0:58c3d014a4e7
|
294
|
|
| slowness |
0:58c3d014a4e7
|
295
|
/** Varbind-list functions. */
|
| slowness |
0:58c3d014a4e7
|
296
|
struct snmp_varbind* snmp_varbind_alloc(struct snmp_obj_id *oid, u8_t type, u8_t len);
|
| slowness |
0:58c3d014a4e7
|
297
|
void snmp_varbind_free(struct snmp_varbind *vb);
|
| slowness |
0:58c3d014a4e7
|
298
|
void snmp_varbind_list_free(struct snmp_varbind_root *root);
|
| slowness |
0:58c3d014a4e7
|
299
|
void snmp_varbind_tail_add(struct snmp_varbind_root *root, struct snmp_varbind *vb);
|
| slowness |
0:58c3d014a4e7
|
300
|
struct snmp_varbind* snmp_varbind_tail_remove(struct snmp_varbind_root *root);
|
| slowness |
0:58c3d014a4e7
|
301
|
|
| slowness |
0:58c3d014a4e7
|
302
|
/** Handle an internal (recv) or external (private response) event. */
|
| slowness |
0:58c3d014a4e7
|
303
|
void snmp_msg_event(u8_t request_id);
|
| slowness |
0:58c3d014a4e7
|
304
|
err_t snmp_send_response(struct snmp_msg_pstat *m_stat);
|
| slowness |
0:58c3d014a4e7
|
305
|
err_t snmp_send_trap(s8_t generic_trap, struct snmp_obj_id *eoid, s32_t specific_trap);
|
| slowness |
0:58c3d014a4e7
|
306
|
void snmp_coldstart_trap(void);
|
| slowness |
0:58c3d014a4e7
|
307
|
void snmp_authfail_trap(void);
|
| slowness |
0:58c3d014a4e7
|
308
|
|
| slowness |
0:58c3d014a4e7
|
309
|
#ifdef __cplusplus
|
| slowness |
0:58c3d014a4e7
|
310
|
}
|
| slowness |
0:58c3d014a4e7
|
311
|
#endif
|
| slowness |
0:58c3d014a4e7
|
312
|
|
| slowness |
0:58c3d014a4e7
|
313
|
#endif /* LWIP_SNMP */
|
| slowness |
0:58c3d014a4e7
|
314
|
|
| slowness |
0:58c3d014a4e7
|
315
|
#endif /* __LWIP_SNMP_MSG_H__ */
|
bruno LARNAUDIE