1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
#!/usr/bin/perl
#
# This script extracts the ASN1 definition from TS 36.331/36.355/25.331/38.331/37.355/36.413/38.413/36.423/38.423
# /38.463/38.473 , and generates asn files that can be processed by asn2wrs
# First download the specification from 3gpp.org as a word document and open it
# Then in "view" menu, select normal, draft or web layout (any kind that removes page header and footers)
# Finally save the document as a text file
# Example with TS 36.331: "perl extract_asn1_from_spec.pl 36331-xxx.txt"
# It should generate: EUTRA-RRC-Definitions.asn, EUTRA-UE-Variables.asn and EUTRA-InterNodeDefinitions
#
# Copyright 2011 Vincent Helfre and Erwan Yvin
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
use warnings;
$input_file = $ARGV[0];
$version = 0;
sub extract_spec_version;
sub extract_asn1;
open(INPUT_FILE, "< $input_file") or die "Can not open file $input_file";
extract_spec_version();
extract_asn1();
close(INPUT_FILE);
# This subroutine extracts the version of the specification
sub extract_spec_version {
my $line;
while($line = <INPUT_FILE>){
if($line =~ m/3GPP TS ((25|36|38)\.331|(36|37)\.355|(36|38)\.413|(36|38)\.423|36\.(443|444)|(36|38)\.455|38\.463|38\.473|37\.483) V/){
$version = $line;
return;
}
}
}
# This subroutine copies the text delimited by -- ASN1START and -- ASN1STOP in INPUT_FILE
# and copies it into OUTPUT_FILE.
# The OUTPUT_FILE is opened on encounter of the keyword "DEFINITIONS AUTOMATIC TAGS"
# and closed on encounter of the keyword "END"
sub extract_asn1 {
my $line;
my $prev_line;
my $is_asn1 = 0;
my $output_file_name = 0;
my $file_name_found = 0;
while($line = <INPUT_FILE>){
if ($line =~ m/-- ASN1STOP/) {
$is_asn1 = 0;
}
if(($file_name_found == 0) && ($line =~ m/^LPP-PDU-Definitions/)){
$output_file_name = "LPP-PDU-Definitions.asn";
print "generating $output_file_name\n";
open(OUTPUT_FILE, "> $output_file_name") or die "Can not open file $output_file_name";
$file_name_found = 1;
syswrite OUTPUT_FILE,"-- "."$version"."\n";
}
if(($file_name_found == 0) && ($line =~ m/^LPP-Broadcast-Definitions/)){
$output_file_name = "LPP-Broadcast-Definitions.asn";
print "generating $output_file_name\n";
open(OUTPUT_FILE, "> $output_file_name") or die "Can not open file $output_file_name";
$file_name_found = 1;
syswrite OUTPUT_FILE,"-- "."$version"."\n";
}
if(($file_name_found == 0) && ($line =~ m/SonTransfer-IEs/)){
$output_file_name = "S1AP-SonTransfer-IEs.asn";
print "generating $output_file_name\n";
open(OUTPUT_FILE, "> $output_file_name") or die "Can not open file $output_file_name";
$is_asn1 = 1;
$file_name_found = 1;
syswrite OUTPUT_FILE,"-- "."$version"."\n";
}
if(($file_name_found == 0) && ($line =~ m/itu-t \(0\) identified-organization \(4\) etsi \(0\) mobileDomain \(0\)/)){
($output_file_name) = ($prev_line =~ m/^([a-zA-Z0-9\-]+)\s/);
$output_file_name = "$output_file_name".".asn";
print "generating $output_file_name\n";
open(OUTPUT_FILE, "> $output_file_name") or die "Can not open file $output_file_name";
$is_asn1 = 1;
$file_name_found = 1;
syswrite OUTPUT_FILE,"-- "."$version"."\n";
syswrite OUTPUT_FILE,"$prev_line";
}
if(($file_name_found == 0) && ($line =~ m/DEFINITIONS AUTOMATIC TAGS ::=/)){
($output_file_name) = ($line =~ m/^([a-zA-Z0-9\-]+)\s+DEFINITIONS AUTOMATIC TAGS ::=/);
$output_file_name = "$output_file_name".".asn";
print "generating $output_file_name\n";
open(OUTPUT_FILE, "> $output_file_name") or die "Can not open file $output_file_name";
$is_asn1 = 1;
$file_name_found = 1;
syswrite OUTPUT_FILE,"-- "."$version"."\n";
}
if (($line =~ /^END[\r\n]/) && (defined fileno OUTPUT_FILE)){
syswrite OUTPUT_FILE,"$line";
close(OUTPUT_FILE);
$is_asn1 = 0;
$file_name_found = 0;
}
if (($is_asn1 == 1) && (defined fileno OUTPUT_FILE)){
syswrite OUTPUT_FILE,"$line";
}
if ($line =~ m/-- ASN1START/) {
$is_asn1 = 1;
}
$prev_line = $line;
}
}
|
