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snmp_asn1.h
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1 
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 #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__ */
GLuint GLuint GLsizei GLenum type
Definition: gl.h:1545
s8_t err_t
Definition: err.h:47
_In_ ULONG _In_ ULONG_PTR ident
Definition: winddi.h:3993
Definition: pbuf.h:79
unsigned long u32_t
Definition: cc.h:25
GLenum GLuint GLenum GLsizei length
Definition: glext.h:5579
GLenum GLsizei len
Definition: glext.h:6722
static INT ident_len(LPCTSTR p)
Definition: set.c:208
unsigned char u8_t
Definition: cc.h:23
signed long s32_t
Definition: cc.h:30
unsigned short u16_t
Definition: cc.h:24
GLfloat GLfloat p
Definition: glext.h:8902