91 lines
3.9 KiB
C
91 lines
3.9 KiB
C
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/**
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* @file
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* Abstract Syntax Notation One (ISO 8824, 8825) codec.
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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_ASN1_H__
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#define __LWIP_SNMP_ASN1_H__
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#include "lwip/opt.h"
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#include "arch/cc.h"
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#include "lwip/err.h"
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#include "lwip/pbuf.h"
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#include "lwip/snmp.h"
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#define SNMP_ASN1_UNIV (!0x80 | !0x40)
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#define SNMP_ASN1_APPLIC (!0x80 | 0x40)
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#define SNMP_ASN1_CONTXT ( 0x80 | !0x40)
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#define SNMP_ASN1_CONSTR (0x20)
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#define SNMP_ASN1_PRIMIT (!0x20)
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/* universal tags */
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#define SNMP_ASN1_INTEG 2
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#define SNMP_ASN1_OC_STR 4
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#define SNMP_ASN1_NUL 5
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#define SNMP_ASN1_OBJ_ID 6
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#define SNMP_ASN1_SEQ 16
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/* application specific (SNMP) tags */
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#define SNMP_ASN1_IPADDR 0 /* octet string size(4) */
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#define SNMP_ASN1_COUNTER 1 /* u32_t */
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#define SNMP_ASN1_GAUGE 2 /* u32_t */
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#define SNMP_ASN1_TIMETICKS 3 /* u32_t */
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#define SNMP_ASN1_OPAQUE 4 /* octet string */
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/* context specific (SNMP) tags */
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#define SNMP_ASN1_PDU_GET_REQ 0
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#define SNMP_ASN1_PDU_GET_NEXT_REQ 1
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#define SNMP_ASN1_PDU_GET_RESP 2
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#define SNMP_ASN1_PDU_SET_REQ 3
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#define SNMP_ASN1_PDU_TRAP 4
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err_t snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type);
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err_t snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length);
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err_t snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value);
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err_t snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value);
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err_t snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid);
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err_t snmp_asn1_dec_raw(struct pbuf *p, u16_t ofs, u16_t len, u16_t raw_len, u8_t *raw);
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void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed);
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void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed);
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void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed);
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void snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed);
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err_t snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type);
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err_t snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length);
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err_t snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, u32_t value);
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err_t snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, s32_t value);
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err_t snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident);
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err_t snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw);
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#endif
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