/** * @file * Abstract Syntax Notation One (ISO 8824, 8825) codec. */ /* * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, *    this list of conditions and the following disclaimer. * 2. 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. * 3. The name of the author may not be used to endorse or promote products *    derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * Author: Christiaan Simons <christiaan.simons@axon.tv> */#ifndef __LWIP_SNMP_ASN1_H__#define __LWIP_SNMP_ASN1_H__#include "lwip/opt.h"#include "arch/cc.h"#include "lwip/err.h"#include "lwip/pbuf.h"#include "lwip/snmp.h"#define SNMP_ASN1_UNIV   (!0x80 | !0x40)#define SNMP_ASN1_APPLIC (!0x80 |  0x40)#define SNMP_ASN1_CONTXT ( 0x80 | !0x40)#define SNMP_ASN1_CONSTR (0x20)#define SNMP_ASN1_PRIMIT (!0x20)/* universal tags */#define SNMP_ASN1_INTEG  2#define SNMP_ASN1_OC_STR 4#define SNMP_ASN1_NUL    5#define SNMP_ASN1_OBJ_ID 6#define SNMP_ASN1_SEQ    16/* application specific (SNMP) tags */#define SNMP_ASN1_IPADDR 0    /* octet string size(4) */#define SNMP_ASN1_COUNTER 1   /* u32_t */#define SNMP_ASN1_GAUGE 2     /* u32_t */#define SNMP_ASN1_TIMETICKS 3 /* u32_t */#define SNMP_ASN1_OPAQUE 4    /* octet string *//* context specific (SNMP) tags */#define SNMP_ASN1_PDU_GET_REQ 0#define SNMP_ASN1_PDU_GET_NEXT_REQ 1#define SNMP_ASN1_PDU_GET_RESP 2#define SNMP_ASN1_PDU_SET_REQ 3#define SNMP_ASN1_PDU_TRAP 4err_t snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type);err_t snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length);err_t snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value);err_t snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value);err_t snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid);err_t snmp_asn1_dec_raw(struct pbuf *p, u16_t ofs, u16_t len, u16_t raw_len, u8_t *raw);void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed);void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed);void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed);void snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed);err_t snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type);err_t snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length);err_t snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, u32_t value);err_t snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, s32_t value);err_t snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident);err_t snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw);#endif