[164] | 1 | /**
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| 2 | * @file
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| 3 | * Abstract Syntax Notation One (ISO 8824, 8825) codec.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
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| 8 | * All rights reserved.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without modification,
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| 11 | * are permitted provided that the following conditions are met:
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| 12 | *
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| 13 | * 1. Redistributions of source code must retain the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 16 | * this list of conditions and the following disclaimer in the documentation
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| 17 | * and/or other materials provided with the distribution.
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| 18 | * 3. The name of the author may not be used to endorse or promote products
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| 19 | * derived from this software without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 30 | * OF SUCH DAMAGE.
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| 31 | *
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| 32 | * Author: Christiaan Simons <christiaan.simons@axon.tv>
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| 33 | */
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| 34 |
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| 35 | #ifndef __LWIP_SNMP_ASN1_H__
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| 36 | #define __LWIP_SNMP_ASN1_H__
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| 37 |
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| 38 | #include "lwip/opt.h"
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| 39 | #include "lwip/err.h"
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| 40 | #include "lwip/pbuf.h"
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| 41 | #include "lwip/snmp.h"
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| 42 |
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| 43 | #if LWIP_SNMP
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| 44 |
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| 45 | #ifdef __cplusplus
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| 46 | extern "C" {
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| 47 | #endif
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| 48 |
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| 49 | #define SNMP_ASN1_UNIV (0) /* (!0x80 | !0x40) */
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| 50 | #define SNMP_ASN1_APPLIC (0x40) /* (!0x80 | 0x40) */
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| 51 | #define SNMP_ASN1_CONTXT (0x80) /* ( 0x80 | !0x40) */
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| 52 |
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| 53 | #define SNMP_ASN1_CONSTR (0x20) /* ( 0x20) */
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| 54 | #define SNMP_ASN1_PRIMIT (0) /* (!0x20) */
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| 55 |
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| 56 | /* universal tags */
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| 57 | #define SNMP_ASN1_INTEG 2
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| 58 | #define SNMP_ASN1_OC_STR 4
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| 59 | #define SNMP_ASN1_NUL 5
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| 60 | #define SNMP_ASN1_OBJ_ID 6
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| 61 | #define SNMP_ASN1_SEQ 16
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| 62 |
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| 63 | /* application specific (SNMP) tags */
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| 64 | #define SNMP_ASN1_IPADDR 0 /* octet string size(4) */
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| 65 | #define SNMP_ASN1_COUNTER 1 /* u32_t */
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| 66 | #define SNMP_ASN1_GAUGE 2 /* u32_t */
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| 67 | #define SNMP_ASN1_TIMETICKS 3 /* u32_t */
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| 68 | #define SNMP_ASN1_OPAQUE 4 /* octet string */
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| 69 |
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| 70 | /* context specific (SNMP) tags */
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| 71 | #define SNMP_ASN1_PDU_GET_REQ 0
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| 72 | #define SNMP_ASN1_PDU_GET_NEXT_REQ 1
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| 73 | #define SNMP_ASN1_PDU_GET_RESP 2
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| 74 | #define SNMP_ASN1_PDU_SET_REQ 3
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| 75 | #define SNMP_ASN1_PDU_TRAP 4
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| 76 |
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| 77 | err_t snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type);
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| 78 | err_t snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length);
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| 79 | err_t snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value);
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| 80 | err_t snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value);
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| 81 | err_t snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid);
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| 82 | 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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| 83 |
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| 84 | void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed);
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| 85 | void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed);
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| 86 | void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed);
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| 87 | void snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed);
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| 88 | err_t snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type);
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| 89 | err_t snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length);
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| 90 | err_t snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u16_t octets_needed, u32_t value);
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| 91 | err_t snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u16_t octets_needed, s32_t value);
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| 92 | err_t snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident);
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| 93 | err_t snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u16_t raw_len, u8_t *raw);
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| 94 |
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| 95 | #ifdef __cplusplus
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| 96 | }
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| 97 | #endif
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| 98 |
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| 99 | #endif /* LWIP_SNMP */
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| 100 |
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| 101 | #endif /* __LWIP_SNMP_ASN1_H__ */
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