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#!/usr/bin/perl
#
# Generates oid.h and oid.c out of oid.txt
#
# Copyright (C) 2003-2004 Andreas Steffen, Zuercher Hochschule Winterthur
# Copyright (C) 2014 Tuomo Soini <tis@foobar.fi>
# Copyright (C) 2014 D. Hugh Redelmeier <hugh@mimosa.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
$fswancopy="Copyright (C) 2003-2004 Andreas Steffen, Zuercher Hochschule Winterthur";
$copyright="Copyright (C) 2014 Tuomo Soini <tis\@foobar.fi>";
$automatic="This file has been generated by the script lib/libswan/oid.pl";
$warning="Do not edit manually!";
print "oid.pl generating ../../include/oid.h and oid.c\n";
# Generate oid.h
open(OID_H, ">../../include/oid.h")
or die "could not open '../../include/oid.h': $!";
print OID_H "/*\n",
" * Object identifiers (OIDs) used by Libreswan\n",
" *\n",
" * ", $fswancopy, "\n",
" * ", $copyright, "\n",
" *\n",
" * ", $automatic, "\n",
" * ", $warning, "\n",
" */\n\n",
"typedef struct {\n",
"\tunsigned char octet;\n",
"\tunsigned char down;\t/* bool */\n",
"\tunsigned short next;\n",
"\tconst char *name;\n",
"} oid_t;\n",
"\n",
"extern const oid_t oid_names[];\n",
"\n",
"#define OID_UNKNOWN\t\t\t(-1)\n";
# parse oid.txt
open(SRC, "<oid.txt")
or die "could not open 'oid.txt': $!";
$counter = 0;
$max_name = 0;
$max_order = 0;
while ($line = <SRC>)
{
next if ($line =~ m/^\h*$/); # ignore empty line
next if ($line =~ m/^#/); # ignore comment line
$line =~ m/^( *?)(0x[0-9a-fA-F]{2})\s+(".*?")[ \t]*?([\w_]*?)\Z/
or die "malformed line: $line";
@order[$counter] = length($1);
@octet[$counter] = $2;
@name[$counter] = $3;
if (length($1) > $max_order)
{
$max_order = length($1);
}
if (length($3) > $max_name)
{
$max_name = length($3);
}
if (length($4) > 0)
{
printf OID_H "#define %s%s%d\n", $4, "\t" x ((39-length($4))/8), $counter;
}
$counter++;
}
close SRC;
close OID_H;
# Generate oid.c
open(OID_C, ">oid.c")
or die "could not open 'oid.c': $!";
print OID_C "/*\n",
" * List of some useful object identifiers (OIDs)\n",
" *\n",
" * ", $fswancopy, "\n",
" * ", $copyright, "\n",
" *\n",
" * ", $automatic, "\n",
" * ", $warning, "\n",
" */\n",
"#include \"oid.h\"\n",
"\n",
"const oid_t oid_names[] = {\n",
"\t/* octet, down, next, name */\n";
for ($c = 0; $c < $counter; $c++)
{
$next = 0;
for ($d = $c+1; $d < $counter && @order[$d] >= @order[$c]; $d++)
{
if (@order[$d] == @order[$c])
{
@next[$c] = $d;
last;
}
}
printf OID_C "\t{ %s%s,%s%d, %3d, %s%s }%s /* %3d */\n"
,' ' x @order[$c]
, @octet[$c]
, ' ' x (1 + $max_order - @order[$c])
, @order[$c+1] > @order[$c]
, @next[$c]
, @name[$c]
, ' ' x ($max_name - length(@name[$c]))
, $c != $counter-1 ? "," : " "
, $c;
}
print OID_C "};\n" ;
close OID_C;
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