mirror of
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Initial commit. Expirimental code, please note this is not yet fully functional.
This commit is contained in:
christiaans
90
src/include/lwip/snmp_asn1.h
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90
src/include/lwip/snmp_asn1.h
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/**
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* @file
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* [EXPIRIMENTAL] Abstract Syntax Notation One (ISO 8824, 8825) codec.
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*/
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/*
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* Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Christiaan Simons <christiaan.simons@axon.tv>
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*/
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#ifndef __LWIP_SNMP_ASN1_H__
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#define __LWIP_SNMP_ASN1_H__
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#include "lwip/opt.h"
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#include "arch/cc.h"
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#include "lwip/err.h"
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#include "lwip/pbuf.h"
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#include "lwip/snmp.h"
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#define SNMP_ASN1_UNIV (!0x80 | !0x40)
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#define SNMP_ASN1_APPLIC (!0x80 | 0x40)
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#define SNMP_ASN1_CONTXT ( 0x80 | !0x40)
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#define SNMP_ASN1_CONSTR (0x20)
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#define SNMP_ASN1_PRIMIT (!0x20)
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/* universal tags */
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#define SNMP_ASN1_INTEG 2
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#define SNMP_ASN1_OC_STR 4
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#define SNMP_ASN1_NUL 5
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#define SNMP_ASN1_OBJ_ID 6
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#define SNMP_ASN1_SEQ 16
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/* application specific (SNMP) tags */
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#define SNMP_ASN1_IPADDR 0 /* octet string size(4) */
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#define SNMP_ASN1_COUNTER 1 /* u32_t */
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#define SNMP_ASN1_GAUGE 2 /* u32_t */
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#define SNMP_ASN1_TIMETICKS 3 /* u32_t */
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#define SNMP_ASN1_OPAQUE 4 /* octet string */
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/* context specific (SNMP) tags */
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#define SNMP_ASN1_PDU_GET_REQ 0
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#define SNMP_ASN1_PDU_GET_NEXT_REQ 1
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#define SNMP_ASN1_PDU_GET_RESP 2
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#define SNMP_ASN1_PDU_SET_REQ 3
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#define SNMP_ASN1_PDU_TRAP 4
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err_t snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type);
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err_t snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length);
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err_t snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value);
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err_t snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value);
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err_t snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid);
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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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void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed);
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void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed);
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void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed);
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void snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed);
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err_t snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type);
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err_t snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length);
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err_t snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, u32_t value);
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err_t snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, s32_t value);
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err_t snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident);
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err_t snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw);
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#endif
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267
src/include/lwip/snmp_msg.h
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267
src/include/lwip/snmp_msg.h
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@@ -0,0 +1,267 @@
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/**
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* @file
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* [EXPIRIMENTAL] SNMP Agent message handling structures.
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*/
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/*
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* Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Christiaan Simons <christiaan.simons@axon.tv>
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*/
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#ifndef __LWIP_SNMP_MSG_H__
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#define __LWIP_SNMP_MSG_H__
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#include "lwip/opt.h"
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#include "arch/cc.h"
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#include "lwip/snmp.h"
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#if SNMP_PRIVATE_MIB
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#include "private_mib.h"
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#endif
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#define SNMP_IN_PORT 161
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#define SNMP_TRAP_PORT 162
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#define SNMP_ES_NOERROR 0
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#define SNMP_ES_TOOBIG 1
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#define SNMP_ES_NOSUCHNAME 2
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#define SNMP_ES_BADVALUE 3
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#define SNMP_ES_READONLY 4
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#define SNMP_ES_GENERROR 5
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struct snmp_varbind
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{
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/* next pointer, NULL for last in list */
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struct snmp_varbind *next;
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/* previous pointer, NULL for first in list */
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struct snmp_varbind *prev;
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/* object identifier length (in s32_t) */
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u8_t ident_len;
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/* object identifier array */
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s32_t *ident;
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/* object value ASN1 type */
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u8_t value_type;
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/* object value length (in u8_t) */
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u8_t value_len;
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/* object value */
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void *value;
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/* encoding varbind seq length length */
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u8_t seqlenlen;
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/* encoding object identifier length length */
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u8_t olenlen;
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/* encoding object value length length */
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u8_t vlenlen;
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/* encoding varbind seq length */
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u16_t seqlen;
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/* encoding object identifier length */
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u16_t olen;
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/* encoding object value length */
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u16_t vlen;
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};
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struct snmp_varbind_root
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{
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struct snmp_varbind *head;
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struct snmp_varbind *tail;
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/* number of variable bindings in list */
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u8_t count;
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/* encoding varbind-list seq length length */
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u8_t seqlenlen;
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/* encoding varbind-list seq length */
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u16_t seqlen;
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};
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/** output response message header length fields */
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struct snmp_resp_header_lengths
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{
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/* encoding error-index length length */
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u8_t erridxlenlen;
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/* encoding error-status length length */
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u8_t errstatlenlen;
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/* encoding request id length length */
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u8_t ridlenlen;
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/* encoding pdu length length */
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u8_t pdulenlen;
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/* encoding community length length */
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u8_t comlenlen;
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/* encoding version length length */
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u8_t verlenlen;
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/* encoding sequence length length */
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u8_t seqlenlen;
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/* encoding error-index length */
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u16_t erridxlen;
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/* encoding error-status length */
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u16_t errstatlen;
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/* encoding request id length */
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u16_t ridlen;
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/* encoding pdu length */
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u16_t pdulen;
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/* encoding community length */
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u16_t comlen;
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/* encoding version length */
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u16_t verlen;
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/* encoding sequence length */
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u16_t seqlen;
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};
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/** output response message header length fields */
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struct snmp_trap_header_lengths
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{
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/* encoding timestamp length length */
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u8_t tslenlen;
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/* encoding specific-trap length length */
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u8_t strplenlen;
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/* encoding generic-trap length length */
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u8_t gtrplenlen;
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/* encoding agent-addr length length */
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u8_t aaddrlenlen;
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/* encoding enterprise-id length length */
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u8_t eidlenlen;
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/* encoding pdu length length */
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u8_t pdulenlen;
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/* encoding community length length */
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u8_t comlenlen;
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/* encoding version length length */
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u8_t verlenlen;
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/* encoding sequence length length */
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u8_t seqlenlen;
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/* encoding timestamp length */
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u16_t tslen;
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/* encoding specific-trap length */
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u16_t strplen;
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/* encoding generic-trap length */
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u16_t gtrplen;
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/* encoding agent-addr length */
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u16_t aaddrlen;
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/* encoding enterprise-id length */
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u16_t eidlen;
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/* encoding pdu length */
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u16_t pdulen;
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/* encoding community length */
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u16_t comlen;
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/* encoding version length */
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u16_t verlen;
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/* encoding sequence length */
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u16_t seqlen;
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};
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/* can accept new SNMP message */
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#define SNMP_MSG_EMPTY 0
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/* decode SNMP variable binding */
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#define SNMP_MSG_DEMUX 1
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/* perform SNMP operation on varbind for in-memory case */
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#define SNMP_MSG_INTERNAL 2
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/* perform SNMP operation on private varbind external case */
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#define SNMP_MSG_EXTERNAL 3
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#define SNMP_COMMUNITY_STR_LEN 64
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struct snmp_msg_pstat
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{
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#if 0
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struct snmp_msg_pstat *next;
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#endif
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/* lwIP local port (161) binding */
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struct udp_pcb *pcb;
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/* source IP address */
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struct ip_addr sip;
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/* source UDP port */
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u16_t sp;
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/* request type */
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u8_t rt;
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/* request ID */
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s32_t rid;
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/* error status */
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s32_t error_status;
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/* error index */
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s32_t error_index;
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/* community name (zero terminated) */
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u8_t community[SNMP_COMMUNITY_STR_LEN + 1];
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/* community string length (exclusive zero term) */
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u8_t com_strlen;
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/* one out of MSG_EMPTY, MSG_DEMUX, MSG_MGMT, MSG_PRIVATE */
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u8_t state;
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/* list of variable bindings from input */
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struct snmp_varbind_root invb;
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/* list of variable bindings to output */
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struct snmp_varbind_root outvb;
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/* output response lengths used in ASN encoding */
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struct snmp_resp_header_lengths rhl;
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#if SNMP_PRIVATE_MIB
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struct private_state ps;
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#endif
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};
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struct snmp_msg_trap
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{
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#if 0
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struct snmp_msg_trap *next;
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#endif
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/* lwIP local port (161) binding */
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struct udp_pcb *pcb;
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/* destination IP address in network order */
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struct ip_addr dip;
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/* source enterprise ID (sysObjectID) */
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struct snmp_obj_id *enterprise;
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/* source IP address, raw network order format */
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u8_t sip_raw[4];
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/* generic trap code */
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u32_t gen_trap;
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/* specific trap code */
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u32_t spc_trap;
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/* timestamp */
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u32_t ts;
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/* list of variable bindings to output */
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struct snmp_varbind_root outvb;
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/* output trap lengths used in ASN encoding */
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struct snmp_trap_header_lengths thl;
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#if SNMP_PRIVATE_MIB
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/** @todo is this really needed? */
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struct private_state ps;
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#endif
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};
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/** Agent Version constant, 0 = v1 oddity */
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extern const s32_t snmp_version;
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/** Agent default "public" community string */
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extern const char snmp_publiccommunity[7];
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extern struct snmp_msg_trap trap_msg;
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/** Agent setup, start listening to port 161. */
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void snmp_init(void);
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err_t snmp_send_response(struct snmp_msg_pstat *m_stat);
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err_t snmp_send_trap(struct ip_addr *dst, s8_t generic_trap, s32_t specific_trap);
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#endif
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