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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_dump import DATADumpFile
from data_if import DATAInterface
from gsm_shared import *
from data_msg import *
COPYRIGHT = \
"Copyright (C) 2017-2018 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 source
capture_file = None
# Count limitations
msg_skip = None
msg_count = None
# Pass filtering
pf_fn_lt = None
pf_fn_gt = None
pf_tn = None
def __init__(self):
self.print_copyright()
self.parse_argv()
# Set up signal handlers
signal.signal(signal.SIGINT, self.sig_handler)
# Open requested capture file
self.ddf = DATADumpFile(self.capture_file)
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)
l12trx = True
elif self.conn_mode == "L1":
self.data_if = DATAInterface(self.remote_addr,
self.base_port + 102, self.base_port + 2)
l12trx = False
else:
self.print_help("[!] Unknown connection type")
sys.exit(2)
# Read messages from the capture
messages = self.ddf.parse_all(
skip = self.msg_skip, count = self.msg_count)
if messages is False:
pass # FIXME!!!
for msg in messages:
# Pass filter
if not self.msg_pass_filter(l12trx, msg):
continue
# HACK: as ToA parsing is not implemented yet,
# we have to use a fixed value for now...
msg.toa256 = 0
print("[i] Sending a burst %s to %s..."
% (msg.desc_hdr(), self.conn_mode))
# Send message
self.data_if.send_msg(msg)
def msg_pass_filter(self, l12trx, msg):
# Direction filter
if isinstance(msg, DATAMSG_L12TRX) and not l12trx:
return False
elif isinstance(msg, DATAMSG_TRX2L1) and l12trx:
return False
# Timeslot filter
if self.pf_tn is not None:
if msg.tn != self.pf_tn:
return False
# Frame number filter
if self.pf_fn_lt is not None:
if msg.fn > self.pf_fn_lt:
return False
if self.pf_fn_gt is not None:
if msg.fn < self.pf_fn_gt:
return False
# Burst passed ;)
return True
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 source\n" \
" -i --capture-file Read bursts from capture file\n\n" \
s += " Count limitations (disabled by default)\n" \
" --msg-skip NUM Skip NUM messages before sending\n" \
" --msg-count NUM Stop after sending NUM messages\n\n" \
s += " Filtering (disabled by default)\n" \
" --timeslot NUM TDMA timeslot number [0..7]\n" \
" --frame-num-lt NUM TDMA frame number lower than NUM\n" \
" --frame-num-gt NUM TDMA frame number greater than NUM\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:h",
[
"help",
"conn-mode=",
"remote-addr=",
"base-port=",
"capture-file=",
"msg-skip=",
"msg-count=",
"timeslot=",
"frame-num-lt=",
"frame-num-gt=",
])
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)
# Capture file
elif o in ("-i", "--capture-file"):
self.capture_file = v
# TRX interface specific
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)
# Count limitations
elif o == "--msg-skip":
self.msg_skip = int(v)
elif o == "--msg-count":
self.msg_count = int(v)
# Timeslot pass filter
elif o == "--timeslot":
self.pf_tn = int(v)
if self.pf_tn < 0 or self.pf_tn > 7:
self.print_help("[!] Wrong timeslot value")
sys.exit(2)
# Frame number pass filter
elif o == "--frame-num-lt":
self.pf_fn_lt = int(v)
elif o == "--frame-num-gt":
self.pf_fn_gt = int(v)
if self.capture_file is None:
self.print_help("[!] Please specify a capture file")
sys.exit(2)
def sig_handler(self, signum, frame):
print("Signal %d received" % signum)
if signum is signal.SIGINT:
sys.exit(0)
if __name__ == '__main__':
app = Application()
app.run()
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