BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
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 | |||
6 | /* |
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7 | * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. |
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8 | * Copyright (c) 2016 Elias Oenal. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without modification, |
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12 | * are permitted provided that the following conditions are met: |
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13 | * |
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14 | * 1. Redistributions of source code must retain the above copyright notice, |
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15 | * this list of conditions and the following disclaimer. |
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16 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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17 | * this list of conditions and the following disclaimer in the documentation |
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18 | * and/or other materials provided with the distribution. |
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19 | * 3. The name of the author may not be used to endorse or promote products |
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20 | * derived from this software without specific prior written permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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24 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
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25 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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26 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
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27 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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30 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
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31 | * OF SUCH DAMAGE. |
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32 | * |
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33 | * Author: Christiaan Simons <christiaan.simons@axon.tv> |
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34 | * Martin Hentschel <info@cl-soft.de> |
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35 | * Elias Oenal <lwip@eliasoenal.com> |
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36 | */ |
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37 | |||
38 | #ifndef LWIP_HDR_APPS_SNMP_ASN1_H |
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39 | #define LWIP_HDR_APPS_SNMP_ASN1_H |
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40 | |||
41 | #include "lwip/apps/snmp_opts.h" |
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42 | |||
43 | #if LWIP_SNMP |
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44 | |||
45 | #include "lwip/err.h" |
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46 | #include "lwip/apps/snmp_core.h" |
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47 | #include "snmp_pbuf_stream.h" |
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48 | |||
49 | #ifdef __cplusplus |
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50 | extern "C" { |
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51 | #endif |
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52 | |||
53 | #define SNMP_ASN1_TLV_INDEFINITE_LENGTH 0x80 |
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54 | |||
55 | #define SNMP_ASN1_CLASS_MASK 0xC0 |
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56 | #define SNMP_ASN1_CONTENTTYPE_MASK 0x20 |
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57 | #define SNMP_ASN1_DATATYPE_MASK 0x1F |
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58 | #define SNMP_ASN1_DATATYPE_EXTENDED 0x1F /* DataType indicating that datatype is encoded in following bytes */ |
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59 | |||
60 | /* context specific (SNMP) tags (from SNMP spec. RFC1157 and RFC1905) */ |
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61 | #define SNMP_ASN1_CONTEXT_PDU_GET_REQ 0 |
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62 | #define SNMP_ASN1_CONTEXT_PDU_GET_NEXT_REQ 1 |
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63 | #define SNMP_ASN1_CONTEXT_PDU_GET_RESP 2 |
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64 | #define SNMP_ASN1_CONTEXT_PDU_SET_REQ 3 |
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65 | #define SNMP_ASN1_CONTEXT_PDU_TRAP 4 |
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66 | #define SNMP_ASN1_CONTEXT_PDU_GET_BULK_REQ 5 |
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67 | #define SNMP_ASN1_CONTEXT_PDU_INFORM_REQ 6 |
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68 | #define SNMP_ASN1_CONTEXT_PDU_V2_TRAP 7 |
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69 | #define SNMP_ASN1_CONTEXT_PDU_REPORT 8 |
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70 | |||
71 | #define SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_OBJECT 0 |
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72 | #define SNMP_ASN1_CONTEXT_VARBIND_END_OF_MIB_VIEW 2 |
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73 | |||
74 | struct snmp_asn1_tlv { |
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75 | u8_t type; /* only U8 because extended types are not specified by SNMP */ |
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76 | u8_t type_len; /* encoded length of 'type' field (normally 1) */ |
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77 | u8_t length_len; /* indicates how many bytes are required to encode the 'value_len' field */ |
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78 | u16_t value_len; /* encoded length of the value */ |
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79 | }; |
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80 | #define SNMP_ASN1_TLV_HDR_LENGTH(tlv) ((tlv).type_len + (tlv).length_len) |
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81 | #define SNMP_ASN1_TLV_LENGTH(tlv) ((tlv).type_len + (tlv).length_len + (tlv).value_len) |
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82 | #define SNMP_ASN1_SET_TLV_PARAMS(tlv, type_, length_len_, value_len_) do { (tlv).type = (type_); (tlv).type_len = 0; (tlv).length_len = (length_len_); (tlv).value_len = (value_len_); } while (0); |
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83 | |||
84 | err_t snmp_asn1_dec_tlv(struct snmp_pbuf_stream *pbuf_stream, struct snmp_asn1_tlv *tlv); |
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85 | err_t snmp_asn1_dec_u32t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t *value); |
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86 | err_t snmp_asn1_dec_s32t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, s32_t *value); |
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87 | err_t snmp_asn1_dec_oid(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t *oid, u8_t *oid_len, u8_t oid_max_len); |
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88 | err_t snmp_asn1_dec_raw(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u8_t *buf, u16_t *buf_len, u16_t buf_max_len); |
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89 | |||
90 | err_t snmp_ans1_enc_tlv(struct snmp_pbuf_stream *pbuf_stream, struct snmp_asn1_tlv *tlv); |
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91 | |||
92 | void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed); |
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93 | void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed); |
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94 | void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed); |
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95 | void snmp_asn1_enc_oid_cnt(const u32_t *oid, u16_t oid_len, u16_t *octets_needed); |
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96 | err_t snmp_asn1_enc_oid(struct snmp_pbuf_stream *pbuf_stream, const u32_t *oid, u16_t oid_len); |
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97 | err_t snmp_asn1_enc_s32t(struct snmp_pbuf_stream *pbuf_stream, u16_t octets_needed, s32_t value); |
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98 | err_t snmp_asn1_enc_u32t(struct snmp_pbuf_stream *pbuf_stream, u16_t octets_needed, u32_t value); |
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99 | err_t snmp_asn1_enc_raw(struct snmp_pbuf_stream *pbuf_stream, const u8_t *raw, u16_t raw_len); |
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100 | |||
101 | #if LWIP_HAVE_INT64 |
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102 | err_t snmp_asn1_dec_u64t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u64_t *value); |
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103 | void snmp_asn1_enc_u64t_cnt(u64_t value, u16_t *octets_needed); |
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104 | err_t snmp_asn1_enc_u64t(struct snmp_pbuf_stream *pbuf_stream, u16_t octets_needed, u64_t value); |
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105 | #endif |
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106 | |||
107 | #ifdef __cplusplus |
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108 | } |
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109 | #endif |
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110 | |||
111 | #endif /* LWIP_SNMP */ |
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112 | |||
113 | #endif /* LWIP_HDR_APPS_SNMP_ASN1_H */ |