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 (at) 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 #if LWIP_SNMP 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 #define SNMP_ASN1_UNIV (0) /* (!0x80 | !0x40) */ 50 #define SNMP_ASN1_APPLIC (0x40) /* (!0x80 | 0x40) */ 51 #define SNMP_ASN1_CONTXT (0x80) /* ( 0x80 | !0x40) */ 52 53 #define SNMP_ASN1_CONSTR (0x20) /* ( 0x20) */ 54 #define SNMP_ASN1_PRIMIT (0) /* (!0x20) */ 55 56 /* universal tags */ 57 #define SNMP_ASN1_INTEG 2 58 #define SNMP_ASN1_OC_STR 4 59 #define SNMP_ASN1_NUL 5 60 #define SNMP_ASN1_OBJ_ID 6 61 #define SNMP_ASN1_SEQ 16 62 63 /* application specific (SNMP) tags */ 64 #define SNMP_ASN1_IPADDR 0 /* octet string size(4) */ 65 #define SNMP_ASN1_COUNTER 1 /* u32_t */ 66 #define SNMP_ASN1_GAUGE 2 /* u32_t */ 67 #define SNMP_ASN1_TIMETICKS 3 /* u32_t */ 68 #define SNMP_ASN1_OPAQUE 4 /* octet string */ 69 70 /* context specific (SNMP) tags */ 71 #define SNMP_ASN1_PDU_GET_REQ 0 72 #define SNMP_ASN1_PDU_GET_NEXT_REQ 1 73 #define SNMP_ASN1_PDU_GET_RESP 2 74 #define SNMP_ASN1_PDU_SET_REQ 3 75 #define SNMP_ASN1_PDU_TRAP 4 76 77 err_t snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type); 78 err_t snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length); 79 err_t snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value); 80 err_t snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value); 81 err_t snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid); 82 err_t snmp_asn1_dec_raw(struct pbuf *p, u16_t ofs, u16_t len, u16_t raw_len, u8_t *raw); 83 84 void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed); 85 void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed); 86 void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed); 87 void snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed); 88 err_t snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type); 89 err_t snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length); 90 err_t snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u16_t octets_needed, u32_t value); 91 err_t snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u16_t octets_needed, s32_t value); 92 err_t snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident); 93 err_t snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u16_t raw_len, u8_t *raw); 94 95 #ifdef __cplusplus 96 } 97 #endif 98 99 #endif /* LWIP_SNMP */ 100 101 #endif /* __LWIP_SNMP_ASN1_H__ */ 102
