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-rw-r--r--src/target/fake_trx/.gitignore4
-rw-r--r--src/target/fake_trx/README24
-rw-r--r--src/target/fake_trx/burst_fwd.py75
-rwxr-xr-xsrc/target/fake_trx/clck_gen.py104
-rwxr-xr-xsrc/target/fake_trx/ctrl_cmd.py77
-rw-r--r--src/target/fake_trx/ctrl_if.py74
-rw-r--r--src/target/fake_trx/ctrl_if_bb.py87
-rw-r--r--src/target/fake_trx/ctrl_if_bts.py87
-rwxr-xr-xsrc/target/fake_trx/fake_trx.py204
-rw-r--r--src/target/fake_trx/udp_link.py53
10 files changed, 789 insertions, 0 deletions
diff --git a/src/target/fake_trx/.gitignore b/src/target/fake_trx/.gitignore
new file mode 100644
index 0000000..749ccda
--- /dev/null
+++ b/src/target/fake_trx/.gitignore
@@ -0,0 +1,4 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
diff --git a/src/target/fake_trx/README b/src/target/fake_trx/README
new file mode 100644
index 0000000..ac138e0
--- /dev/null
+++ b/src/target/fake_trx/README
@@ -0,0 +1,24 @@
+This is a set of tools for creating a virtual Um-interface between
+OsmocomBB and OsmoBTS. It may be extremely useful for testing and
+development of GSM stack, including both sides (MS and BTS). This
+software implements OsmoTRX (Osmocom's fork of OpenBTS transceiver)
+style clock (CLCK), control (CTRL) and data interfaces. So, OsmoBTS
+source code doesn't require any modifications, while for OsmocomBB
+you will need to use a new application - trxcon, which can be found
+in the 'fixeria/sdr_phy' branch until one is merged to master.
+
+Brief description of available applications:
+
+ - fake_trx.py - main application, that allows to connect both
+ OsmocomBB and OsmoBTS without actual RF hardware. Currently
+ only a single MS may work with a single BTS.
+
+ - clck_gen.py - a peripheral tool aimed to emulate TDMA frame
+ clock generator. Could be used for testing and clock
+ synchronization of multiple applications. It should be noted,
+ that one relays on generic system timer (via Python), so
+ a random clock jitter takes place.
+
+ - ctrl_cmd.py - another peripheral tool, which could be used
+ for sending CTRL commands directly in manual mode, and also
+ for application fuzzing.
diff --git a/src/target/fake_trx/burst_fwd.py b/src/target/fake_trx/burst_fwd.py
new file mode 100644
index 0000000..d822747
--- /dev/null
+++ b/src/target/fake_trx/burst_fwd.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# BTS <-> BB burst forwarding
+#
+# (C) 2017 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.
+
+class BurstForwarder:
+ # Timeslot filter
+ ts_pass = 0
+
+ def __init__(self, bts_link, bb_link):
+ self.bts_link = bts_link
+ self.bb_link = bb_link
+
+ def set_slot(self, ts):
+ if ts > 0 and ts < 8:
+ self.ts_pass = ts
+ else:
+ raise ValueError("Incorrect index for timeslot filter")
+
+ def process_payload(self, data):
+ payload = bytearray(data)
+ length = len(payload)
+
+ # HACK: set fake RSSI value (-53)
+ payload[5] = 0x35
+
+ # HACK: add fake TOA value (6th and 7th bytes)
+ payload[6:2] = [0x00, 0x00]
+
+ # Convert ubits to {255..0}
+ for i in range(8, length):
+ payload[i] = 255 if payload[i] else 0
+
+ return payload
+
+ # Downlink handler: BTS -> BB
+ def bts2bb(self):
+ # Read data from socket
+ data, addr = self.bts_link.sock.recvfrom(512)
+ payload = self.process_payload(data)
+
+ # Timeslot filter
+ if payload[0] != self.ts_pass:
+ return None
+
+ # Send burst to BB
+ self.bb_link.send(payload)
+
+ # Uplink handler: BB -> BTS
+ def bb2bts(self):
+ # Read data from socket
+ data, addr = self.bb_link.sock.recvfrom(512)
+ payload = self.process_payload(data)
+
+ # Send burst to BTS
+ self.bts_link.send(payload)
diff --git a/src/target/fake_trx/clck_gen.py b/src/target/fake_trx/clck_gen.py
new file mode 100755
index 0000000..4ef597f
--- /dev/null
+++ b/src/target/fake_trx/clck_gen.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# Simple TDMA frame clock generator
+#
+# (C) 2017 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 time
+import sys
+
+from threading import Timer
+from udp_link import UDPLink
+
+class CLCKGen:
+ # GSM TDMA definitions
+ SEC_DELAY_US = 1000 * 1000
+ GSM_SUPERFRAME = 2715648
+ GSM_FRAME_US = 4615.0
+
+ # Average loop back delay
+ LO_DELAY_US = 90.0
+
+ def __init__(self, clck_links, clck_start = 0, ind_period = 102):
+ self.clck_links = clck_links
+ self.ind_period = ind_period
+ self.clck_src = clck_start
+
+ # Calculate counter time
+ self.ctr_interval = self.GSM_FRAME_US - self.LO_DELAY_US
+ self.ctr_interval /= self.SEC_DELAY_US
+ self.ctr_interval *= self.ind_period
+
+ # Create a timer manager
+ self.timer = Timer(self.ctr_interval, self.send_clck_ind)
+
+ def start(self):
+ # Schedule the first indication
+ self.timer.start()
+
+ def stop(self):
+ self.timer.cancel()
+
+ def send_clck_ind(self):
+ # Keep clock cycle
+ if self.clck_src % self.GSM_SUPERFRAME >= 0:
+ self.clck_src %= self.GSM_SUPERFRAME
+
+ # We don't need to send so often
+ if self.clck_src % self.ind_period == 0:
+ # Create UDP payload
+ payload = "IND CLOCK %u\0" % self.clck_src
+
+ # Send indication to all UDP links
+ for link in self.clck_links:
+ link.send(payload)
+
+ # Debug print
+ print("[T] %s" % payload)
+
+ # Increase frame count
+ self.clck_src += self.ind_period
+
+ # Schedule a new indication
+ self.timer = Timer(self.ctr_interval, self.send_clck_ind)
+ self.timer.start()
+
+# Just a wrapper for independent usage
+class Application:
+ def __init__(self):
+ # Set up signal handlers
+ signal.signal(signal.SIGINT, self.sig_handler)
+
+ def run(self):
+ self.link = UDPLink("127.0.0.1", 5800, 5700)
+ self.clck = CLCKGen([self.link], ind_period = 51)
+ self.clck.start()
+
+ def sig_handler(self, signum, frame):
+ print "Signal %d received" % signum
+ if signum is signal.SIGINT:
+ self.clck.stop()
+ self.link.shutdown()
+
+if __name__ == '__main__':
+ app = Application()
+ app.run()
diff --git a/src/target/fake_trx/ctrl_cmd.py b/src/target/fake_trx/ctrl_cmd.py
new file mode 100755
index 0000000..91d2a65
--- /dev/null
+++ b/src/target/fake_trx/ctrl_cmd.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Simple tool to send custom commands via TRX CTRL interface,
+# which may be also useful for fuzzing
+#
+# (C) 2017 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 select
+import sys
+
+from udp_link import UDPLink
+
+class Application:
+ def __init__(self, remote_addr, remote_port, bind_port, fuz = False):
+ # Init UDP connection
+ self.ctrl_link = UDPLink(remote_addr, remote_port, bind_port)
+
+ # Determine working mode
+ self.fuzzing = fuz
+
+ # Set up signal handlers
+ signal.signal(signal.SIGINT, self.sig_handler)
+
+ def run(self):
+ while True:
+ self.print_prompt()
+
+ # Wait until we get any data on any socket
+ socks = [sys.stdin]
+ r_event, w_event, x_event = select.select(socks, [], [])
+
+ # Check for incoming CTRL commands
+ if sys.stdin in r_event:
+ cmd = sys.stdin.readline()
+ self.handle_cmd(cmd)
+
+ def handle_cmd(self, cmd):
+ # Strip spaces, tabs, etc.
+ cmd = cmd.strip().strip("\0")
+
+ # Send a command
+ if self.fuzzing:
+ self.ctrl_link.send("%s" % cmd)
+ else:
+ self.ctrl_link.send("CMD %s\0" % cmd)
+
+ def print_prompt(self):
+ sys.stdout.write("CTRL# ")
+ sys.stdout.flush()
+
+ def sig_handler(self, signum, frame):
+ print("\n\nSignal %d received" % signum)
+ if signum is signal.SIGINT:
+ self.ctrl_link.shutdown()
+ sys.exit(0)
+
+if __name__ == '__main__':
+ app = Application("127.0.0.1", 5701, 5801)
+ app.run()
diff --git a/src/target/fake_trx/ctrl_if.py b/src/target/fake_trx/ctrl_if.py
new file mode 100644
index 0000000..a87c4c4
--- /dev/null
+++ b/src/target/fake_trx/ctrl_if.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# CTRL interface implementation
+#
+# (C) 2016-2017 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.
+
+from udp_link import UDPLink
+
+class CTRLInterface(UDPLink):
+ def handle_rx(self, data):
+ # print(data)
+ if self.verify_req(data):
+ request = self.prepare_req(data)
+ rc = self.parse_cmd(request)
+ self.send_response(request, rc)
+ else:
+ print("[!] Wrong data on CTRL interface")
+
+ def verify_req(self, data):
+ # Verify command signature
+ return data.startswith("CMD")
+
+ def prepare_req(self, data):
+ # Strip signature, paddings and \0
+ request = data[4:].strip().strip("\0")
+ # Split into a command and arguments
+ request = request.split(" ")
+ # Now we have something like ["TXTUNE", "941600"]
+ return request
+
+ def verify_cmd(self, request, cmd, argc):
+ # Check if requested command matches
+ if request[0] != cmd:
+ return False
+
+ # And has enough arguments
+ if len(request) - 1 != argc:
+ return False
+
+ # Check if all arguments are numeric
+ for v in request[1:]:
+ if not v.isdigit():
+ return False
+
+ return True
+
+ def send_response(self, request, response_code):
+ # Include status code, for example ["TXTUNE", "0", "941600"]
+ request.insert(1, str(response_code))
+ # Add the response signature, and join back to string
+ response = "RSP " + " ".join(request) + "\0"
+ # Now we have something like "RSP TXTUNE 0 941600"
+ self.send(response)
+
+ def parse_cmd(self, request):
+ raise NotImplementedError
diff --git a/src/target/fake_trx/ctrl_if_bb.py b/src/target/fake_trx/ctrl_if_bb.py
new file mode 100644
index 0000000..6880000
--- /dev/null
+++ b/src/target/fake_trx/ctrl_if_bb.py
@@ -0,0 +1,87 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# CTRL interface implementation (OsmocomBB specific)
+#
+# (C) 2016-2017 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.
+
+from ctrl_if import CTRLInterface
+
+class CTRLInterfaceBB(CTRLInterface):
+ # Internal state variables
+ trx_started = False
+ rx_freq = None
+ tx_freq = None
+
+ def __init__(self, remote_addr, remote_port, bind_port):
+ print("[i] Init CTRL interface for BB")
+ CTRLInterface.__init__(self, remote_addr, remote_port, bind_port)
+
+ def shutdown(self):
+ print("[i] Shutdown CTRL interface for BB")
+ CTRLInterface.shutdown(self)
+
+ def parse_cmd(self, request):
+ # Power control
+ if self.verify_cmd(request, "POWERON", 0):
+ print("[i] Recv POWERON CMD")
+
+ # Ensure transceiver isn't working
+ if self.trx_started:
+ print("[!] Transceiver already started")
+ return -1
+
+ # Ensure RX / TX freq. are set
+ if (self.rx_freq is None) or (self.tx_freq is None):
+ print("[!] Transceiver already started")
+ return -1
+
+ print("[i] Starting transceiver...")
+ self.trx_started = True
+ return 0
+
+ elif self.verify_cmd(request, "POWEROFF", 0):
+ print("[i] Recv POWEROFF cmd")
+
+ print("[i] Stopping transceiver...")
+ self.trx_started = False
+ return 0
+
+ # Tuning Control
+ elif self.verify_cmd(request, "RXTUNE", 1):
+ print("[i] Recv RXTUNE cmd")
+
+ # TODO: check freq range
+ self.rx_freq = int(request[1]) * 1000
+ return 0
+
+ elif self.verify_cmd(request, "TXTUNE", 1):
+ print("[i] Recv TXTUNE cmd")
+
+ # TODO: check freq range
+ self.tx_freq = int(request[1]) * 1000
+ return 0
+
+ # Wrong / unknown command
+ else:
+ # We don't care about other commands,
+ # so let's merely ignore them ;)
+ print("[i] Ignore CMD %s" % request[0])
+ return 0
diff --git a/src/target/fake_trx/ctrl_if_bts.py b/src/target/fake_trx/ctrl_if_bts.py
new file mode 100644
index 0000000..cdaaf81
--- /dev/null
+++ b/src/target/fake_trx/ctrl_if_bts.py
@@ -0,0 +1,87 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# CTRL interface implementation (OsmoBTS specific)
+#
+# (C) 2016-2017 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.
+
+from ctrl_if import CTRLInterface
+
+class CTRLInterfaceBTS(CTRLInterface):
+ # Internal state variables
+ trx_started = False
+ rx_freq = None
+ tx_freq = None
+
+ def __init__(self, remote_addr, remote_port, bind_port):
+ print("[i] Init CTRL interface for BTS")
+ CTRLInterface.__init__(self, remote_addr, remote_port, bind_port)
+
+ def shutdown(self):
+ print("[i] Shutdown CTRL interface for BTS")
+ CTRLInterface.shutdown(self)
+
+ def parse_cmd(self, request):
+ # Power control
+ if self.verify_cmd(request, "POWERON", 0):
+ print("[i] Recv POWERON CMD")
+
+ # Ensure transceiver isn't working
+ if self.trx_started:
+ print("[!] Transceiver already started")
+ return -1
+
+ # Ensure RX / TX freq. are set
+ if (self.rx_freq is None) or (self.tx_freq is None):
+ print("[!] Transceiver already started")
+ return -1
+
+ print("[i] Starting transceiver...")
+ self.trx_started = True
+ return 0
+
+ elif self.verify_cmd(request, "POWEROFF", 0):
+ print("[i] Recv POWEROFF cmd")
+
+ print("[i] Stopping transceiver...")
+ self.trx_started = False
+ return 0
+
+ # Tuning Control
+ elif self.verify_cmd(request, "RXTUNE", 1):
+ print("[i] Recv RXTUNE cmd")
+
+ # TODO: check freq range
+ self.rx_freq = int(request[1]) * 1000
+ return 0
+
+ elif self.verify_cmd(request, "TXTUNE", 1):
+ print("[i] Recv TXTUNE cmd")
+
+ # TODO: check freq range
+ self.tx_freq = int(request[1]) * 1000
+ return 0
+
+ # Wrong / unknown command
+ else:
+ # We don't care about other commands,
+ # so let's merely ignore them ;)
+ print("[i] Ignore CMD %s" % request[0])
+ return 0
diff --git a/src/target/fake_trx/fake_trx.py b/src/target/fake_trx/fake_trx.py
new file mode 100755
index 0000000..c30382b
--- /dev/null
+++ b/src/target/fake_trx/fake_trx.py
@@ -0,0 +1,204 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# OsmocomBB <-> OsmoBTS bridge
+#
+# (C) 2017 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 select
+import sys
+
+from ctrl_if_bts import CTRLInterfaceBTS
+from ctrl_if_bb import CTRLInterfaceBB
+from burst_fwd import BurstForwarder
+
+from udp_link import UDPLink
+from clck_gen import CLCKGen
+
+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
+ bts_addr = "127.0.0.1"
+ bb_addr = "127.0.0.1"
+ bts_base_port = 5700
+ bb_base_port = 5703
+
+ def __init__(self):
+ self.print_copyright()
+ self.parse_argv()
+
+ # Set up signal handlers
+ signal.signal(signal.SIGINT, self.sig_handler)
+
+ def run(self):
+ # Init TRX CTRL interface for BTS
+ self.bts_ctrl = CTRLInterfaceBTS(self.bts_addr,
+ self.bts_base_port + 101, self.bts_base_port + 1)
+
+ # Init TRX CTRL interface for BB
+ self.bb_ctrl = CTRLInterfaceBB(self.bb_addr,
+ self.bb_base_port + 101, self.bb_base_port + 1)
+
+ # BTS <-> BB burst forwarding
+ self.bts_data = UDPLink(self.bts_addr,
+ self.bts_base_port + 102, self.bts_base_port + 2)
+ self.bb_data = UDPLink(self.bb_addr,
+ self.bb_base_port + 102, self.bb_base_port + 2)
+ self.burst_fwd = BurstForwarder(self.bts_data, self.bb_data)
+
+ # Share clock between BTS and BB
+ self.bts_clck = UDPLink(self.bts_addr,
+ self.bts_base_port + 100, self.bts_base_port)
+ self.bb_clck = UDPLink(self.bb_addr,
+ self.bb_base_port + 100, self.bb_base_port)
+ self.clck_gen = CLCKGen([self.bts_clck, self.bb_clck])
+ self.clck_gen.start()
+
+ print("[i] Init complete")
+
+ # Enter main loop
+ while True:
+ socks = [self.bts_ctrl.sock, self.bb_ctrl.sock,
+ self.bts_data.sock, self.bb_data.sock]
+
+ # Wait until we get any data on any socket
+ r_event, w_event, x_event = select.select(socks, [], [])
+
+ # Downlink: BTS -> BB
+ if self.bts_data.sock in r_event:
+ self.burst_fwd.bts2bb()
+
+ # Uplink: BB -> BTS
+ if self.bb_data.sock in r_event:
+ self.burst_fwd.bb2bts()
+
+ # CTRL commands from BTS
+ if self.bts_ctrl.sock in r_event:
+ data, addr = self.bts_ctrl.sock.recvfrom(128)
+ self.bts_ctrl.handle_rx(data)
+
+ # CTRL commands from BB
+ if self.bb_ctrl.sock in r_event:
+ data, addr = self.bb_ctrl.sock.recvfrom(128)
+ self.bb_ctrl.handle_rx(data)
+
+ def shutdown(self):
+ print("[i] Shutting down...")
+
+ # Stop clock generator
+ self.clck_gen.stop()
+
+ # Close CLCK interfaces
+ self.bts_clck.shutdown()
+ self.bb_clck.shutdown()
+
+ # Close CTRL interfaces
+ self.bts_ctrl.shutdown()
+ self.bb_ctrl.shutdown()
+
+ # Close DATA interfaces
+ self.bts_data.shutdown()
+ self.bb_data.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" \
+ " -R --bts-addr Set BTS remote address (default %s)\n" \
+ " -r --bb-addr Set BB remote address (default %s)\n" \
+ " -P --bts-base-port Set BTS base port number (default %d)\n" \
+ " -p --bb-base-port Set BB base port number (default %d)\n"
+
+ print(s % (self.bts_addr, self.bb_addr,
+ self.bts_base_port, self.bb_base_port))
+
+ if msg is not None:
+ print(msg)
+
+ def parse_argv(self):
+ try:
+ opts, args = getopt.getopt(sys.argv[1:],
+ "R:r:P:p:h",
+ ["help", "bts-addr=", "bb-addr=",
+ "bts-base-port=", "bb-base-port="])
+ 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 ("-R", "--bts-addr"):
+ self.bts_addr = v
+ elif o in ("-r", "--bb-addr"):
+ self.bb_addr = v
+
+ elif o in ("-P", "--bts-base-port"):
+ self.bts_base_port = int(v)
+ elif o in ("-p", "--bb-base-port"):
+ self.bb_base_port = int(v)
+
+ # Ensure there is no overlap between ports
+ if self.bts_base_port == self.bb_base_port:
+ self.print_help("[!] BTS and BB base ports should be different")
+ sys.exit(2)
+
+ bts_ports = [
+ self.bts_base_port + 0, self.bts_base_port + 100,
+ self.bts_base_port + 1, self.bts_base_port + 101,
+ self.bts_base_port + 2, self.bts_base_port + 102,
+ ]
+
+ bb_ports = [
+ self.bb_base_port + 0, self.bb_base_port + 100,
+ self.bb_base_port + 1, self.bb_base_port + 101,
+ self.bb_base_port + 2, self.bb_base_port + 102,
+ ]
+
+ for p in bb_ports:
+ if p in bts_ports:
+ self.print_help("[!] BTS and BB ports overlap detected")
+ sys.exit(2)
+
+ 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()
diff --git a/src/target/fake_trx/udp_link.py b/src/target/fake_trx/udp_link.py
new file mode 100644
index 0000000..3fa5050
--- /dev/null
+++ b/src/target/fake_trx/udp_link.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# UDP link implementation
+#
+# (C) 2017 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 socket
+import select
+
+class UDPLink:
+ def __init__(self, remote_addr, remote_port, bind_port):
+ self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+ self.sock.bind(('0.0.0.0', bind_port))
+ self.sock.setblocking(0)
+
+ # Save remote info
+ self.remote_addr = remote_addr
+ self.remote_port = remote_port
+
+ def loop(self):
+ r_event, w_event, x_event = select.select([self.sock], [], [])
+
+ # Check for incoming data
+ if self.sock in r_event:
+ data, addr = self.sock.recvfrom(128)
+ self.handle_rx(data)
+
+ def shutdown(self):
+ self.sock.close();
+
+ def send(self, data):
+ self.sock.sendto(data, (self.remote_addr, self.remote_port))
+
+ def handle_rx(self, data):
+ raise NotImplementedError