93 lines
2.7 KiB
Perl
Executable File
93 lines
2.7 KiB
Perl
Executable File
#!/usr/bin/perl
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#
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# This script extracts the ASN1 definition from and TS 36.331/36.355/25.331/38.331
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# and generates asn files that can be processed by asn2wrs
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# First download the specification from 3gpp.org as a word document and open it
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# Then in "view" menu, select normal, draft or web layout (any kind that removes page header and footers)
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# Finally save the document as a text file
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# Example with TS 36.331: "perl extract_asn1_from_spec.pl 36331-xxx.txt"
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# It should generate: EUTRA-RRC-Definitions.asn, EUTRA-UE-Variables.asn and EUTRA-InterNodeDefinitions
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#
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# Copyright 2011 Vincent Helfre and Erwan Yvin
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#
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# Wireshark - Network traffic analyzer
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# By Gerald Combs <gerald@wireshark.org>
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# Copyright 1998 Gerald Combs
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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use warnings;
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$input_file = $ARGV[0];
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$version = 0;
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sub extract_spec_version;
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sub extract_asn1;
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open(INPUT_FILE, "< $input_file") or die "Can not open file $input_file";
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extract_spec_version();
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extract_asn1();
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close(INPUT_FILE);
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# This subroutine extracts the version of the specification
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sub extract_spec_version {
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my $line;
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while($line = <INPUT_FILE>){
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if($line =~ m/3GPP TS ((25|36|38)\.331|36\.355) V/){
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$version = $line;
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return;
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}
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}
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}
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# This subroutine copies the text delimited by -- ASN1START and -- ASN1STOP in INPUT_FILE
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# and copies it into OUTPUT_FILE.
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# The OUTPUT_FILE is opened on encounter of the keyword "DEFINITIONS AUTOMATIC TAGS"
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# and closed on encounter of the keyword "END"
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sub extract_asn1 {
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my $line;
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my $is_asn1 = 0;
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my $output_file_name = 0;
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my $file_name_found = 0;
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while($line = <INPUT_FILE>){
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if ($line =~ m/-- ASN1STOP/) {
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$is_asn1 = 0;
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}
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if($line =~ m/ LPP-PDU-Definitions/){
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$output_file_name = "LPP.asn";
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print "generating $output_file_name\n";
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open(OUTPUT_FILE, "> $output_file_name") or die "Can not open file $output_file_name";
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$file_name_found = 1;
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}
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if(($file_name_found == 0) && ($line =~ m/DEFINITIONS AUTOMATIC TAGS ::=/)){
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($output_file_name) = ($line =~ m/^([a-zA-Z0-9\-]+)\s+DEFINITIONS AUTOMATIC TAGS ::=/);
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$output_file_name = "$output_file_name".".asn";
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print "generating $output_file_name\n";
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open(OUTPUT_FILE, "> $output_file_name") or die "Can not open file $output_file_name";
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$is_asn1 = 1;
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$file_name_found = 1;
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}
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if (($line =~ /^END/) && (defined fileno OUTPUT_FILE)){
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syswrite OUTPUT_FILE,"$line";
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close(OUTPUT_FILE);
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$is_asn1 = 0;
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$file_name_found = 0;
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}
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if (($is_asn1 == 1) && (defined fileno OUTPUT_FILE)){
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syswrite OUTPUT_FILE,"$line";
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}
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if ($line =~ m/-- ASN1START/) {
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$is_asn1 = 1;
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}
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}
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}
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