FreeRTOS/Common/ethernet/lwIP_130/src/include/lwip/snmp_asn1.h

   1 /**
   2  * @file
   3  * Abstract Syntax Notation One (ISO 8824, 8825) codec.
   4  */
   5
   6 /*
   7  * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without modification,
  11  * are permitted provided that the following conditions are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright notice,
  14  *    this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright notice,
  16  *    this list of conditions and the following disclaimer in the documentation
  17  *    and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  24  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  26  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  30  * OF SUCH DAMAGE.
  31  *
  32  * Author: Christiaan Simons <christiaan.simons@axon.tv>
  33  */
  34
  35 #ifndef __LWIP_SNMP_ASN1_H__
  36 #define __LWIP_SNMP_ASN1_H__
  37
  38 #include "lwip/opt.h"
  39 #include "lwip/err.h"
  40 #include "lwip/pbuf.h"
  41 #include "lwip/snmp.h"
  42
  43 #ifdef __cplusplus
  44 extern "C" {
  45 #endif
  46
  47 #define SNMP_ASN1_UNIV   (!0x80 | !0x40)
  48 #define SNMP_ASN1_APPLIC (!0x80 |  0x40)
  49 #define SNMP_ASN1_CONTXT ( 0x80 | !0x40)
  50
  51 #define SNMP_ASN1_CONSTR (0x20)
  52 #define SNMP_ASN1_PRIMIT (!0x20)
  53
  54 /* universal tags */
  55 #define SNMP_ASN1_INTEG  2
  56 #define SNMP_ASN1_OC_STR 4
  57 #define SNMP_ASN1_NUL    5
  58 #define SNMP_ASN1_OBJ_ID 6
  59 #define SNMP_ASN1_SEQ    16
  60
  61 /* application specific (SNMP) tags */
  62 #define SNMP_ASN1_IPADDR 0    /* octet string size(4) */
  63 #define SNMP_ASN1_COUNTER 1   /* u32_t */
  64 #define SNMP_ASN1_GAUGE 2     /* u32_t */
  65 #define SNMP_ASN1_TIMETICKS 3 /* u32_t */
  66 #define SNMP_ASN1_OPAQUE 4    /* octet string */
  67
  68 /* context specific (SNMP) tags */
  69 #define SNMP_ASN1_PDU_GET_REQ 0
  70 #define SNMP_ASN1_PDU_GET_NEXT_REQ 1
  71 #define SNMP_ASN1_PDU_GET_RESP 2
  72 #define SNMP_ASN1_PDU_SET_REQ 3
  73 #define SNMP_ASN1_PDU_TRAP 4
  74
  75 err_t snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type);
  76 err_t snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length);
  77 err_t snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value);
  78 err_t snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value);
  79 err_t snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid);
  80 err_t snmp_asn1_dec_raw(struct pbuf *p, u16_t ofs, u16_t len, u16_t raw_len, u8_t *raw);
  81
  82 void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed);
  83 void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed);
  84 void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed);
  85 void snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed);
  86 err_t snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type);
  87 err_t snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length);
  88 err_t snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, u32_t value);
  89 err_t snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, s32_t value);
  90 err_t snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident);
  91 err_t snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw);
  92
  93 #ifdef __cplusplus
  94 }
  95 #endif
  96
  97 #endif /* __LWIP_SNMP_ASN1_H__ */