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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
# Auxiliary tool to send existing bursts via TRX DATA interface
#
# (C) 2017-2018 by Vadim Yanitskiy <axilirator@gmail.com>
#
# All Rights Reserved
#
# 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.
#
# 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.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import signal
import getopt
import sys
from data_if import DATAInterface
from gsm_shared import *
from data_msg import *
COPYRIGHT = \
"Copyright (C) 2017 by Vadim Yanitskiy <axilirator@gmail.com>\n" \
"License GPLv2+: GNU GPL version 2 or later " \
"<http://gnu.org/licenses/gpl.html>\n" \
"This is free software: you are free to change and redistribute it.\n" \
"There is NO WARRANTY, to the extent permitted by law.\n"
class Application:
# Application variables
remote_addr = "127.0.0.1"
base_port = 5700
conn_mode = "TRX"
burst_src = None
# Common header fields
fn = None
tn = None
# Message specific header fields
rssi = None
toa = None
pwr = None
def __init__(self):
self.print_copyright()
self.parse_argv()
# Set up signal handlers
signal.signal(signal.SIGINT, self.sig_handler)
def run(self):
# Init DATA interface with TRX or L1
if self.conn_mode == "TRX":
self.data_if = DATAInterface(self.remote_addr,
self.base_port + 2, self.base_port + 102)
elif self.conn_mode == "L1":
self.data_if = DATAInterface(self.remote_addr,
self.base_port + 102, self.base_port + 2)
else:
self.print_help("[!] Unknown connection type")
sys.exit(2)
# Open the burst source (file or stdin)
if self.burst_src is not None:
print("[i] Reading bursts from file '%s'..." % self.burst_src)
src = open(self.burst_src, "r")
else:
print("[i] Reading bursts from stdin...")
src = sys.stdin
# Init an empty DATA message
if self.conn_mode == "TRX":
msg = DATAMSG_L12TRX()
elif self.conn_mode == "L1":
msg = DATAMSG_TRX2L1()
# Generate a random frame number or use provided one
fn = msg.rand_fn() if self.fn is None else self.fn
# Read the burst source line-by-line
for line in src:
# Strip spaces
burst_str = line.strip()
burst = []
# Check length
if len(burst_str) not in (GSM_BURST_LEN, EDGE_BURST_LEN):
print("[!] Dropping burst due to incorrect length")
continue
# Randomize the message header
msg.rand_hdr()
# Set frame number
msg.fn = fn
# Set timeslot number
if self.tn is not None:
msg.tn = self.tn
# Set transmit power level
if self.pwr is not None:
msg.pwr = self.pwr
# Set time of arrival
if self.toa is not None:
msg.toa = self.toa
# Set RSSI
if self.rssi is not None:
msg.rssi = self.rssi
# Parse a string
for bit in burst_str:
if bit == "1":
burst.append(1)
else:
burst.append(0)
# Convert to soft-bits in case of TRX -> L1 message
if self.conn_mode == "L1":
burst = msg.ubit2sbit(burst)
# Set burst
msg.burst = burst
print("[i] Sending a burst %s to %s..."
% (msg.desc_hdr(), self.conn_mode))
# Send message
self.data_if.send_msg(msg)
# Increase frame number (for count > 1)
fn = (fn + 1) % GSM_HYPERFRAME
# Finish
self.shutdown()
def print_copyright(self):
print(COPYRIGHT)
def print_help(self, msg = None):
s = " Usage: " + sys.argv[0] + " [options]\n\n" \
" Some help...\n" \
" -h --help this text\n\n"
s += " TRX interface specific\n" \
" -m --conn-mode Send bursts to: TRX (default) / L1\n" \
" -r --remote-addr Set remote address (default %s)\n" \
" -p --base-port Set base port number (default %d)\n\n"
s += " Burst generation\n" \
" -i --burst-file Read bursts from file (default stdin)\n" \
" -f --frame-number Set frame number (default random)\n" \
" -t --timeslot Set timeslot index (default random)\n" \
" --pwr Set power level (default random)\n" \
" --rssi Set RSSI (default random)\n" \
" --toa Set TOA (default random)\n\n"
print(s % (self.remote_addr, self.base_port))
if msg is not None:
print(msg)
def parse_argv(self):
try:
opts, args = getopt.getopt(sys.argv[1:],
"m:r:p:i:f:t:h",
[
"help",
"conn-mode=",
"remote-addr=",
"base-port=",
"burst-file=",
"frame-number=",
"timeslot=",
"rssi=",
"toa=",
"pwr=",
])
except getopt.GetoptError as err:
self.print_help("[!] " + str(err))
sys.exit(2)
for o, v in opts:
if o in ("-h", "--help"):
self.print_help()
sys.exit(2)
elif o in ("-m", "--conn-mode"):
self.conn_mode = v
elif o in ("-r", "--remote-addr"):
self.remote_addr = v
elif o in ("-p", "--base-port"):
self.base_port = int(v)
elif o in ("-i", "--burst-file"):
self.burst_src = v
elif o in ("-f", "--frame-number"):
self.fn = int(v)
elif o in ("-t", "--timeslot"):
self.tn = int(v)
# Message specific header fields
elif o == "--pwr":
self.pwr = int(v)
elif o == "--rssi":
self.rssi = int(v)
elif o == "--toa":
self.toa = float(v)
def shutdown(self):
self.data_if.shutdown()
def sig_handler(self, signum, frame):
print("Signal %d received" % signum)
if signum is signal.SIGINT:
self.shutdown()
sys.exit(0)
if __name__ == '__main__':
app = Application()
app.run()
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