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NAME

gensnmptree

 - generate C and header files from a MIB description file

 

SYNOPSIS

DESCRIPTION

If none of the options -e -E or are used reads a MIB description from its standard input and creates two files: a C-file prefix tree.c containing a table used by bsnmpd(1) during PDU processing and a header file prefix tree.h containing appropriate declarations of the callback functions used in this table, the table itself and definitions for all enums.

The following options are available:

-d

Switch on debugging.

-E

Extract enumerations and bit constructs. In this mode the tool emits a header file that contains for each type given on the command line a C-enum definition and a preprocessor define that may be used to map values to strings.

-e

expects MIB variable names (only the last component) on its command line. It reads a MIB specification from standard input and for each MIB variable name emits three C preprocessor defines on its standard output:

OIDX_ name

This define can be used to initialize a struct asn_oid in the following way:

const struct asn_oid oid_sysDescr = OIDX_sysDescr;

OIDLEN_ name

is the length of the OID.

OID_ name

is the last component of the OID.

-h

Print a short help page.

-I directory

Add the named directory to the include path just before the standard include directories.

-i infile

Read from the named file instead of standard input.

-l

Generate local preprocessor includes. This is used for bootstrapping bsnmpd(1).

-t

Instead of normal output print the resulting tree.

-p prefix

Prefix the file names and the table name with prefix

MIBS

 file := top | top file

 top := tree | typedef | include

 tree := head elements ')'

 entry := head ':' index STRING elements ')'

 leaf := head type STRING ACCESS ')'

 column := head type ACCESS ')'

 type := BASETYPE | BASETYPE '|' subtype | enum | bits

 subtype := STRING

 enum := ENUM '(' value ')'

 bits := BITS '(' value ')'

 value := INT STRING | INT STRING value

 head := '(' INT STRING

 elements := EMPTY | elements element

 element := tree | leaf | column

 index := type | index type

 typedef := 'typedef' STRING type

 include := 'include' filespec

 filespec := '"' STRING '"' | '<' STRING '>'

BASETYPE specifies a SNMP data type and may be one of

• NULL
• INTEGER
• INTEGER32 (same as INTEGER)
• UNSIGNED32 (same as GAUGE)
• OCTETSTRING
• IPADDRESS
• OID
• TIMETICKS
• COUNTER
• GAUGE
• COUNTER64

ACCESS specifies the accessibility of the MIB variable (which operation can be performed) and is one of

• GET
• SET

INT is a decimal integer and STRING is any string starting with a letter or underscore and consisting of letters, digits, underscores and minuses, that is not one of the keywords.

The typedef directive associates a type with a single name.

The include directive is replaced by the contents of the named file.  

EXAMPLES

include "tc.def"

typedef AdminStatus ENUM (
        1 up
        2 down
)

(1 internet
  (2 mgmt
    (1 mibII
      (1 system
        (1 sysDescr OCTETSTRING op_system_group GET)
        (2 sysObjectId OID op_system_group GET)
        (3 sysUpTime TIMETICKS op_system_group GET)
        (4 sysContact OCTETSTRING op_system_group GET SET)
        (5 sysName OCTETSTRING op_system_group GET SET)
        (6 sysLocation OCTETSTRING op_system_group GET SET)
        (7 sysServices INTEGER op_system_group GET)
        (8 sysORLastChange TIMETICKS op_system_group GET)
        (9 sysORTable
          (1 sysOREntry : INTEGER op_or_table
            (1 sysORIndex INTEGER)
            (2 sysORID OID GET)
            (3 sysORDescr OCTETSTRING GET)
            (4 sysORUpTime TIMETICKS GET)
        ))
      )
    )
  )
)

SEE ALSO

AUTHORS

Index

NAME

SYNOPSIS

DESCRIPTION

MIBS

EXAMPLES

SEE ALSO

AUTHORS

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