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248 lines
6.4 KiB
248 lines
6.4 KiB
4 months ago
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#!/bin/sh
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#
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# Copyright (c) 1990, 1996
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# John Robert LoVerso. All rights reserved.
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# SMIv2 parsing copyright (c) 1999
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# William C. Fenner.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notices, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notices, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# This script will read either ASN.1-style MIB files or the ".defs" files
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# created by the ISODE "mosy" program on such files.
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#
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# The output of this script is the "mib.h" file used by tcpdumps' ASN.1/SNMP
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# decoding code.
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#
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# This script needs to be run by "gawk" (GNU awk). "nawk" will work, but
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# dump will get a recursion error if you process LARGE mibs. While it would
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# by farily easy to rewrite this not to use recursion (and also easy to
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# eliminate use of gsub and functions to use classic "awk"), you have to
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# order the structure declarations in defined-first order for the compiler
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# not to barf; too bad tsort doesn't take arguments.
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#
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cat << EOF
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/*
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* This file was generated by tcpdump/makemib on `date`
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* You probably don't want to edit this by hand!
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*
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* struct mib somename = { desc, oid-octet, type, child-pointer, next-pointer
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};
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*/
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EOF
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awk '
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BEGIN {
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debug=0;
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# for sanity, we prep the namespace with objects from RFC-1155
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# (we manually establish the root)
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oid["iso"]=1
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oidadd("org", "iso", 3)
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oidadd("dod", "org", 6)
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oidadd("internet", "dod", 1)
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oidadd("directory", "internet", 1)
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oidadd("mgmt", "internet", 2)
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#XXX oidadd("mib", "mgmt", 1)
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oidadd("mib-2", "mgmt", 1)
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oidadd("experimental", "internet", 3)
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oidadd("private", "internet", 4)
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oidadd("enterprises", "private", 1)
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oidadd("ip", "mib-2", 4)
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oidadd("transmission", "mib-2", 10)
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holddesc="none"
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}
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#
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# Read mosy "*.defs" file. mosy does all the parsing work; we just read
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# its simple and straightforward output. It would not be too hard to make
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# tcpdump directly read mosy output, but...
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#
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# Ignore these unless the current file is called something.defs; false
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# positives are too common in DESCRIPTIONs.
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NF > 1 && index($2,".")>0 && FILENAME ~ /\.defs/ {
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# currently ignore items of the form "{ iso.3.6.1 }"
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if (split($2, p, ".") == 2) {
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oidadd($1, p[1], p[2])
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}
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next
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}
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#
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# Must be a MIB file
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# Make it easier to parse - used to be done by sed
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{ sub(/--\*.*\*--/, ""); sub(/--.*/, ""); gsub(/[{}]/, " & "); }
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#
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# this next section is simple and naive, but does the job ok
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#
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# foo OBJECT IDENTIFIER ::= { baz 17 }
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# or
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# foo OBJECT IDENTIFIER ::=
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# { baz 17 }
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$2$3$4 == "OBJECTIDENTIFIER::=" {
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holddesc="none"
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if (NF == 8)
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oidadd($1, $6, $7)
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if (NF == 4)
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holddesc=$1
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next
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}
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$1 == "{" && holddesc != "none" && NF == 4 {
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oidadd(holddesc, $2, $3)
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holddesc="none"
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}
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#
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# foo OBJECT IDENTIFIER
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# ::= { bar 1 }
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$2$3 == "OBJECTIDENTIFIER" && $1 != "SYNTAX" && NF == 3 {
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holddesc=$1
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}
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#
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# foo
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# OBJECT IDENTIFIER ::= { bar 1 }
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# a couple of heuristics to exclude single words in e.g. long
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# DESCRIPTION clauses
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NF == 1 && $1 ~ "[a-z][a-z]*[A-Z]" && $1 !~ /[(){}.,]/ && holddesc == "none" {
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holddesc=$1
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}
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$1$2$3 == "OBJECTIDENTIFIER::=" && holddesc != "none" {
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oidadd(holddesc, $5, $6)
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holddesc="none"
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}
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#
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# "normal" style
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# foo OBJECT-TYPE ...
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# ...
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# ::= { baz 5 }
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$2 == "MODULE-IDENTITY" || $2 == "MODULE-COMPLIANCE" ||
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$2 == "OBJECT-IDENTITY" || $2 == "OBJECT-TYPE" ||
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$2 == "OBJECT-GROUP" ||
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$2 == "NOTIFICATION-TYPE" || $2 == "NOTIFICATION-GROUP" {
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holddesc=$1
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}
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$1 == "::=" && holddesc != "none" && NF == 5 {
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oidadd(holddesc, $3, $4)
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holddesc="none"
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}
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#
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# foo ::= { baz 17 }
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$2$3 == "::={" {
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oidadd($1,$4,$5)
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holddesc="none"
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}
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#
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# End of the road - output the data.
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#
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END {
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print "struct obj"
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dump("iso")
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print "*mibroot = &_iso_obj;"
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}
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function inn(file) {
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if (file == "" || file == "-")
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return ""
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return " in " file
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}
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#
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# add a new object to the tree
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#
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# new OBJECT IDENTIFIER ::= { parent value }
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#
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function oidadd(new, parent, value) {
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# Ignore 0.0
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if (parent == "0" && value == 0)
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return
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if (debug)
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print "/* oidadd" inn(FILENAME) ":", new, "in", parent, "as", value, "line", $0, "*/"
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# use safe C identifiers
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gsub(/[-&\/]/,"",new)
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gsub(/[-&\/]/,"",parent)
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# check if parent missing
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if (oid[parent] == "") {
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printf "/* parse problem%s: no parent for %s.%s(%d) */\n", \
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inn(FILENAME), parent, new, value
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return
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}
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# check if parent.value already exists
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if (oid[new] > 0 && oid[new] != value) {
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printf "/* parse problem%s: dup %s.%s(%d) != old (%d) */\n", \
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inn(FILENAME), parent, new, value, oid[new]
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return
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}
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# check for new name for parent.value
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if (child[parent] != "") {
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for (sib = child[parent]; sib != ""; sib = sibling[sib])
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if (oid[sib] == value) {
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if (new != sib)
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printf "/* parse problem%s: new name" \
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" \"%s\"" \
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" for %s.%s(%d) ignored */\n", \
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inn(FILENAME), new, parent, \
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sib, value
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return
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}
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}
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oid[new]=value
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if (child[parent] == "") {
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child[parent] = new
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} else {
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sibling[new] = child[parent]
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child[parent] = new
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}
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}
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#
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# old(?) routine to recurse down the tree (in postfix order for convenience)
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#
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function dump(item, c, s) {
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# newitem=sofar"."item"("oid[item]")"
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# printf "/* %s c=%s s=%s */\n", newitem, child[item], sibling[item]
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c="NULL"
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if (child[item] != "") {
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dump(child[item])
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c = "&_"child[item]"_obj"
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}
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s="NULL"
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if (sibling[item] != "") {
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dump(sibling[item])
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s = "&_"sibling[item]"_obj"
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}
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printf "_%s_obj = {\n\t\"%s\", %d, 0,\n\t%s, %s\n},\n", \
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item, item, oid[item], c, s
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}
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' $@
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exit 0
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