183 lines
6.1 KiB
C
183 lines
6.1 KiB
C
/*
|
|
* Copyright (c) 2001-2003
|
|
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
|
|
* All rights reserved.
|
|
*
|
|
* Author: Harti Brandt <harti@freebsd.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Begemot: bsnmp/lib/asn1.h,v 1.18 2004/08/06 08:46:50 brandt Exp $
|
|
*
|
|
* ASN.1 for SNMP
|
|
*/
|
|
#ifndef asn1_h_
|
|
#define asn1_h_
|
|
|
|
#include <sys/types.h>
|
|
|
|
struct asn_buf {
|
|
union {
|
|
u_char *ptr;
|
|
const u_char *cptr;
|
|
} asn_u;
|
|
size_t asn_len;
|
|
};
|
|
#define asn_cptr asn_u.cptr
|
|
#define asn_ptr asn_u.ptr
|
|
|
|
/* these restrictions are in the SMI */
|
|
#define ASN_MAXID 0xffffffff
|
|
#define ASN_MAXOIDLEN 128
|
|
|
|
/* the string needed for this (with trailing zero) */
|
|
#define ASN_OIDSTRLEN (ASN_MAXOIDLEN * (10 + 1) - 1 + 1)
|
|
|
|
/* type of subidentifiers */
|
|
typedef uint32_t asn_subid_t;
|
|
|
|
struct asn_oid {
|
|
u_int len;
|
|
asn_subid_t subs[ASN_MAXOIDLEN];
|
|
};
|
|
|
|
enum asn_err {
|
|
/* conversion was ok */
|
|
ASN_ERR_OK = 0,
|
|
/* conversion failed and stopped */
|
|
ASN_ERR_FAILED = 1 | 0x1000,
|
|
/* length field bad, value skipped */
|
|
ASN_ERR_BADLEN = 2,
|
|
/* out of buffer, stopped */
|
|
ASN_ERR_EOBUF = 3 | 0x1000,
|
|
/* length ok, but value is out of range */
|
|
ASN_ERR_RANGE = 4,
|
|
/* not the expected tag, stopped */
|
|
ASN_ERR_TAG = 5 | 0x1000,
|
|
};
|
|
#define ASN_ERR_STOPPED(E) (((E) & 0x1000) != 0)
|
|
|
|
/* type for the length field of encoded values. The length is restricted
|
|
* to 65535, but using uint16_t would give conversion warnings on gcc */
|
|
typedef uint32_t asn_len_t; /* could be also uint16_t */
|
|
|
|
/* maximal length of a long length field without the length of the length */
|
|
#define ASN_MAXLEN 65535
|
|
#define ASN_MAXLENLEN 2 /* number of bytes in a length */
|
|
|
|
/* maximum size of an octet string as per SMIv2 */
|
|
#define ASN_MAXOCTETSTRING 65535
|
|
|
|
extern void (*asn_error)(const struct asn_buf *, const char *, ...);
|
|
|
|
enum asn_err asn_get_header(struct asn_buf *, u_char *, asn_len_t *);
|
|
enum asn_err asn_put_header(struct asn_buf *, u_char, asn_len_t);
|
|
|
|
enum asn_err asn_put_temp_header(struct asn_buf *, u_char, u_char **);
|
|
enum asn_err asn_commit_header(struct asn_buf *, u_char *);
|
|
|
|
enum asn_err asn_get_integer_raw(struct asn_buf *, asn_len_t, int32_t *);
|
|
enum asn_err asn_get_integer(struct asn_buf *, int32_t *);
|
|
enum asn_err asn_put_integer(struct asn_buf *, int32_t);
|
|
|
|
enum asn_err asn_get_octetstring_raw(struct asn_buf *, asn_len_t, u_char *, u_int *);
|
|
enum asn_err asn_get_octetstring(struct asn_buf *, u_char *, u_int *);
|
|
enum asn_err asn_put_octetstring(struct asn_buf *, const u_char *, u_int);
|
|
|
|
enum asn_err asn_get_null_raw(struct asn_buf *b, asn_len_t);
|
|
enum asn_err asn_get_null(struct asn_buf *);
|
|
enum asn_err asn_put_null(struct asn_buf *);
|
|
|
|
enum asn_err asn_put_exception(struct asn_buf *, u_int);
|
|
|
|
enum asn_err asn_get_objid_raw(struct asn_buf *, asn_len_t, struct asn_oid *);
|
|
enum asn_err asn_get_objid(struct asn_buf *, struct asn_oid *);
|
|
enum asn_err asn_put_objid(struct asn_buf *, const struct asn_oid *);
|
|
|
|
enum asn_err asn_get_sequence(struct asn_buf *, asn_len_t *);
|
|
|
|
enum asn_err asn_get_ipaddress_raw(struct asn_buf *, asn_len_t, u_char *);
|
|
enum asn_err asn_get_ipaddress(struct asn_buf *, u_char *);
|
|
enum asn_err asn_put_ipaddress(struct asn_buf *, const u_char *);
|
|
|
|
enum asn_err asn_get_uint32_raw(struct asn_buf *, asn_len_t, uint32_t *);
|
|
enum asn_err asn_put_uint32(struct asn_buf *, u_char, uint32_t);
|
|
|
|
enum asn_err asn_get_counter64_raw(struct asn_buf *, asn_len_t, uint64_t *);
|
|
enum asn_err asn_put_counter64(struct asn_buf *, uint64_t);
|
|
|
|
enum asn_err asn_get_timeticks(struct asn_buf *, uint32_t *);
|
|
enum asn_err asn_put_timeticks(struct asn_buf *, uint32_t);
|
|
|
|
enum asn_err asn_skip(struct asn_buf *, asn_len_t);
|
|
|
|
/*
|
|
* Utility functions for OIDs
|
|
*/
|
|
/* get a sub-OID from the middle of another OID */
|
|
void asn_slice_oid(struct asn_oid *, const struct asn_oid *, u_int, u_int);
|
|
|
|
/* append an OID to another one */
|
|
void asn_append_oid(struct asn_oid *, const struct asn_oid *);
|
|
|
|
/* compare two OIDs */
|
|
int asn_compare_oid(const struct asn_oid *, const struct asn_oid *);
|
|
|
|
/* check whether the first is a suboid of the second one */
|
|
int asn_is_suboid(const struct asn_oid *, const struct asn_oid *);
|
|
|
|
/* format an OID into a user buffer of size ASN_OIDSTRLEN */
|
|
char *asn_oid2str_r(const struct asn_oid *, char *);
|
|
|
|
/* format an OID into a private static buffer */
|
|
char *asn_oid2str(const struct asn_oid *);
|
|
|
|
enum {
|
|
ASN_TYPE_BOOLEAN = 0x01,
|
|
ASN_TYPE_INTEGER = 0x02,
|
|
ASN_TYPE_BITSTRING = 0x03,
|
|
ASN_TYPE_OCTETSTRING = 0x04,
|
|
ASN_TYPE_NULL = 0x05,
|
|
ASN_TYPE_OBJID = 0x06,
|
|
ASN_TYPE_SEQUENCE = 0x10,
|
|
|
|
ASN_TYPE_CONSTRUCTED = 0x20,
|
|
ASN_CLASS_UNIVERSAL = 0x00,
|
|
ASN_CLASS_APPLICATION = 0x40,
|
|
ASN_CLASS_CONTEXT = 0x80,
|
|
ASN_CLASS_PRIVATE = 0xc0,
|
|
ASN_TYPE_MASK = 0x1f,
|
|
|
|
ASN_APP_IPADDRESS = 0x00,
|
|
ASN_APP_COUNTER = 0x01,
|
|
ASN_APP_GAUGE = 0x02,
|
|
ASN_APP_TIMETICKS = 0x03,
|
|
ASN_APP_OPAQUE = 0x04, /* not implemented */
|
|
ASN_APP_COUNTER64 = 0x06,
|
|
|
|
ASN_EXCEPT_NOSUCHOBJECT = 0x00,
|
|
ASN_EXCEPT_NOSUCHINSTANCE = 0x01,
|
|
ASN_EXCEPT_ENDOFMIBVIEW = 0x02,
|
|
};
|
|
|
|
#endif
|