Merge branch 'development' into ptrkrysik/trx
# Conflicts:
# lib/CMakeLists.txt
diff --git a/apps/trx/ctrl_if.py b/apps/trx/ctrl_if.py
new file mode 100644
index 0000000..0129d7f
--- /dev/null
+++ b/apps/trx/ctrl_if.py
@@ -0,0 +1,82 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# GR-GSM based 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):
+ if self.verify_req(data):
+ request = self.prepare_req(data)
+ rc = self.parse_cmd(request)
+
+ if type(rc) is tuple:
+ self.send_response(request, rc[0], rc[1])
+ else:
+ 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, params = None):
+ # Include status code, for example ["TXTUNE", "0", "941600"]
+ request.insert(1, str(response_code))
+
+ # Optionally append command specific parameters
+ if params is not None:
+ request += params
+
+ # 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/apps/trx/ctrl_if_bb.py b/apps/trx/ctrl_if_bb.py
new file mode 100644
index 0000000..b0d54f9
--- /dev/null
+++ b/apps/trx/ctrl_if_bb.py
@@ -0,0 +1,142 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# GR-GSM based transceiver
+# CTRL interface for OsmocomBB
+#
+# (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):
+ def __init__(self, remote_addr, remote_port, bind_port, tb, pm):
+ print("[i] Init CTRL interface")
+ CTRLInterface.__init__(self, remote_addr, remote_port, bind_port)
+
+ # Set link to the follow graph (top block)
+ self.tb = tb
+ # Power measurement
+ self.pm = pm
+
+ def shutdown(self):
+ print("[i] Shutdown CTRL interface")
+ 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.tb.trx_started:
+ print("[!] Transceiver already started")
+ return -1
+
+ # Ensure transceiver is ready to start
+ if not self.tb.check_available():
+ print("[!] Transceiver isn't ready to start")
+ return -1
+
+ print("[i] Starting transceiver...")
+ self.tb.trx_started = True
+ self.tb.start()
+
+ return 0
+
+ elif self.verify_cmd(request, "POWEROFF", 0):
+ print("[i] Recv POWEROFF cmd")
+
+ # TODO: flush all buffers between blocks
+ if self.tb.trx_started:
+ print("[i] Stopping transceiver...")
+ self.tb.trx_started = False
+ self.tb.stop()
+ self.tb.wait()
+
+ return 0
+
+ elif self.verify_cmd(request, "SETRXGAIN", 1):
+ print("[i] Recv SETRXGAIN cmd")
+
+ # TODO: check gain value
+ gain = int(request[1])
+ self.tb.set_gain(gain)
+
+ return 0
+
+ # Tuning Control
+ elif self.verify_cmd(request, "RXTUNE", 1):
+ print("[i] Recv RXTUNE cmd")
+
+ # TODO: check freq range
+ freq = int(request[1]) * 1000
+ self.tb.set_fc(freq)
+
+ return 0
+
+ elif self.verify_cmd(request, "TXTUNE", 1):
+ print("[i] Recv TXTUNE cmd")
+
+ # TODO: is not implemented yet
+ return 0
+
+ # Timeslot management
+ elif self.verify_cmd(request, "SETSLOT", 2):
+ print("[i] Recv SETSLOT cmd")
+
+ # Obtain TS index
+ tn = int(request[1])
+ if tn not in range(0, 8):
+ print("[!] TS index should be in range: 0..7")
+ return -1
+
+ # Ignore timeslot type for now
+ # Value 0 means 'drop all'
+ config = -1 if int(request[2]) == 0 else tn
+
+ print("[i] Configure timeslot filter to: %s"
+ % ("drop all" if config == -1 else "TS %d" % tn))
+
+ # HACK: configure built-in timeslot filter
+ self.tb.gsm_trx_if.ts_filter_set_tn(config)
+
+ return 0
+
+ # Power measurement
+ elif self.verify_cmd(request, "MEASURE", 1):
+ print("[i] Recv MEASURE cmd")
+
+ # TODO: check freq range
+ meas_freq = int(request[1]) * 1000
+
+ # HACK: send fake low power values
+ # until actual power measurement is implemented
+ meas_dbm = str(self.pm.measure(meas_freq))
+
+ return (0, [meas_dbm])
+
+ # Misc
+ elif self.verify_cmd(request, "ECHO", 0):
+ print("[i] Recv ECHO cmd")
+ return 0
+
+ # Wrong / unknown command
+ else:
+ print("[!] Wrong request on CTRL interface")
+ return -1
diff --git a/apps/trx/fake_pm.py b/apps/trx/fake_pm.py
new file mode 100644
index 0000000..1d76916
--- /dev/null
+++ b/apps/trx/fake_pm.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# Virtual Um-interface (fake transceiver)
+# Power measurement emulation for BB
+#
+# (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.
+
+from random import randint
+
+class FakePM:
+ # Freq. list for good power level
+ bts_list = []
+
+ def __init__(self, noise_min, noise_max, bts_min, bts_max):
+ # Save power level ranges
+ self.noise_min = noise_min
+ self.noise_max = noise_max
+ self.bts_min = bts_min
+ self.bts_max = bts_max
+
+ def measure(self, bts):
+ if bts in self.bts_list:
+ return randint(self.bts_min, self.bts_max)
+ else:
+ return randint(self.noise_min, self.noise_max)
+
+ def update_bts_list(self, new_list):
+ self.bts_list = new_list
+
+ def add_bts_list(self, add_list):
+ self.bts_list += add_list
+
+ def del_bts_list(self, del_list):
+ for item in del_list:
+ if item in self.bts_list:
+ self.bts_list.remove(item)
diff --git a/apps/trx/grgsm_trx.py b/apps/trx/grgsm_trx.py
new file mode 100755
index 0000000..fbc9350
--- /dev/null
+++ b/apps/trx/grgsm_trx.py
@@ -0,0 +1,155 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# GR-GSM based transceiver
+#
+# (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.
+
+import signal
+import getopt
+import sys
+
+from ctrl_if_bb import CTRLInterfaceBB
+from radio_if import RadioInterface
+from fake_pm import FakePM
+
+COPYRIGHT = \
+ "Copyright (C) 2016-2017 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
+
+ # PHY specific
+ phy_sample_rate = 2000000
+ phy_subdev_spec = False
+ phy_gain = 30
+ phy_args = ""
+ phy_ppm = 0
+
+ def __init__(self):
+ self.print_copyright()
+ self.parse_argv()
+
+ # Set up signal handlers
+ signal.signal(signal.SIGINT, self.sig_handler)
+
+ def run(self):
+ # Init Radio interface
+ self.radio = RadioInterface(self.phy_args, self.phy_subdev_spec,
+ self.phy_sample_rate, self.phy_gain, self.phy_ppm,
+ self.remote_addr, self.base_port)
+
+ # Power measurement emulation
+ # Noise: -120 .. -105
+ # BTS: -75 .. -50
+ self.pm = FakePM(-120, -105, -75, -50)
+
+ # Init TRX CTRL interface
+ self.server = CTRLInterfaceBB(self.remote_addr,
+ self.base_port + 101, self.base_port + 1,
+ self.radio, self.pm)
+
+ print("[i] Init complete")
+
+ # Enter main loop
+ while True:
+ self.server.loop()
+
+ def shutdown(self):
+ print("[i] Shutting down...")
+ self.server.shutdown()
+ self.radio.shutdown()
+
+ def print_copyright(self):
+ print(COPYRIGHT)
+
+ def print_help(self):
+ s = " Usage: " + sys.argv[0] + " [options]\n\n" \
+ " Some help...\n" \
+ " -h --help this text\n\n"
+
+ # TRX specific
+ s += " TRX interface specific\n" \
+ " -s --remote-addr Set remote address (default 127.0.0.1)\n" \
+ " -p --base-port Set base port number (default 5700)\n\n"
+
+ # PHY specific
+ s += " Radio interface specific\n" \
+ " -a --device-args Set device arguments\n" \
+ " -s --sample-rate Set PHY sample rate (default 2000000)\n" \
+ " -S --subdev-spec Set PHY sub-device specification\n" \
+ " -g --gain Set PHY gain (default 30)\n" \
+ " --ppm Set PHY frequency correction (default 0)\n"
+
+ print(s)
+
+ def parse_argv(self):
+ try:
+ opts, args = getopt.getopt(sys.argv[1:],
+ "a:p:i:s:S:g:h",
+ ["help", "remote-addr=", "base-port=", "device-args=",
+ "gain=", "subdev-spec=", "sample-rate=", "ppm="])
+ except getopt.GetoptError as err:
+ # Print(help and exit)
+ self.print_help()
+ print("[!] " + str(err))
+ sys.exit(2)
+
+ for o, v in opts:
+ if o in ("-h", "--help"):
+ self.print_help()
+ sys.exit(2)
+
+ # TRX specific
+ elif o in ("-i", "--remote-addr"):
+ self.remote_addr = v
+ elif o in ("-p", "--base-port"):
+ if int(v) >= 0 and int(v) <= 65535:
+ self.base_port = int(v)
+ else:
+ print("[!] The port number should be in range [0-65536]")
+ sys.exit(2)
+
+ # PHY specific
+ elif o in ("-a", "--device-args"):
+ self.phy_args = v
+ elif o in ("-g", "--gain"):
+ self.phy_gain = int(v)
+ elif o in ("-S", "--subdev-spec"):
+ self.phy_subdev_spec = v
+ elif o in ("-s", "--sample-rate"):
+ self.phy_sample_rate = int(v)
+ elif o in ("--ppm"):
+ self.phy_ppm = int(v)
+
+ 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/apps/trx/radio_if.py b/apps/trx/radio_if.py
new file mode 100644
index 0000000..c162f69
--- /dev/null
+++ b/apps/trx/radio_if.py
@@ -0,0 +1,175 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# GR-GSM based transceiver
+# Follow graph 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.
+
+import pmt
+import time
+import grgsm
+import osmosdr
+
+from math import pi
+
+from gnuradio import blocks
+from gnuradio import gr
+
+class RadioInterface(gr.top_block):
+ # PHY specific variables
+ samp_rate = 2000000
+ shiftoff = 400e3
+ subdev_spec = "" # TODO: use it
+ device_args = ""
+ fc = 941.6e6 # TODO: set ARFCN to 0?
+ gain = 30
+ ppm = 0
+
+ # Application state flags
+ trx_started = False
+ fc_set = False
+
+ def __init__(self, phy_args, phy_subdev_spec,
+ phy_sample_rate, phy_gain, phy_ppm,
+ trx_remote_addr, trx_base_port):
+ print("[i] Init Radio interface")
+
+ # TRX block specific variables
+ self.trx_remote_addr = trx_remote_addr
+ self.trx_base_port = trx_base_port
+
+ # PHY specific variables
+ self.subdev_spec = phy_subdev_spec
+ self.samp_rate = phy_sample_rate
+ self.device_args = phy_args
+ self.gain = phy_gain
+ self.ppm = phy_ppm
+
+ gr.top_block.__init__(self, "GR-GSM TRX")
+ shift_fc = self.fc - self.shiftoff
+
+ ##################################################
+ # PHY Definition
+ ##################################################
+ self.phy = osmosdr.source(
+ args = "numchan=%d %s" % (1, self.device_args))
+
+ self.phy.set_bandwidth(250e3 + abs(self.shiftoff), 0)
+ self.phy.set_center_freq(shift_fc, 0)
+ self.phy.set_sample_rate(self.samp_rate)
+ self.phy.set_freq_corr(self.ppm, 0)
+ self.phy.set_iq_balance_mode(2, 0)
+ self.phy.set_dc_offset_mode(2, 0)
+ self.phy.set_gain_mode(False, 0)
+ self.phy.set_gain(self.gain, 0)
+ self.phy.set_if_gain(20, 0)
+ self.phy.set_bb_gain(20, 0)
+ self.phy.set_antenna("", 0)
+
+ ##################################################
+ # GR-GSM Magic
+ ##################################################
+ self.blocks_rotator = blocks.rotator_cc(
+ -2 * pi * self.shiftoff / self.samp_rate)
+
+ self.gsm_input = grgsm.gsm_input(
+ ppm = self.ppm, osr = 4, fc = self.fc,
+ samp_rate_in = self.samp_rate)
+
+ self.gsm_receiver = grgsm.receiver(4, ([0]), ([]))
+
+ self.gsm_clck_ctrl = grgsm.clock_offset_control(
+ shift_fc, self.samp_rate, osr = 4)
+
+ self.gsm_trx_if = grgsm.trx(self.trx_remote_addr,
+ str(self.trx_base_port))
+
+ ##################################################
+ # Connections
+ ##################################################
+ self.connect((self.phy, 0), (self.blocks_rotator, 0))
+ self.connect((self.blocks_rotator, 0), (self.gsm_input, 0))
+ self.connect((self.gsm_input, 0), (self.gsm_receiver, 0))
+
+ self.msg_connect((self.gsm_receiver, 'measurements'),
+ (self.gsm_clck_ctrl, 'measurements'))
+
+ self.msg_connect((self.gsm_clck_ctrl, 'ctrl'),
+ (self.gsm_input, 'ctrl_in'))
+
+ self.msg_connect((self.gsm_receiver, 'C0'),
+ (self.gsm_trx_if, 'bursts'))
+
+ def check_available(self):
+ return self.fc_set
+
+ def shutdown(self):
+ print("[i] Shutdown Radio interface")
+ self.stop()
+ self.wait()
+
+ def get_args(self):
+ return self.args
+
+ def set_args(self, args):
+ self.args = args
+
+ def get_fc(self):
+ return self.fc
+
+ def set_fc(self, fc):
+ self.phy.set_center_freq(fc - self.shiftoff, 0)
+ self.gsm_input.set_fc(fc)
+ self.fc_set = True
+ self.fc = fc
+
+ def get_gain(self):
+ return self.gain
+
+ def set_gain(self, gain):
+ self.phy.set_gain(gain, 0)
+ self.gain = gain
+
+ def get_ppm(self):
+ return self.ppm
+
+ def set_ppm(self, ppm):
+ self.rtlsdr_source_0.set_freq_corr(ppm, 0)
+ self.ppm = ppm
+
+ def get_samp_rate(self):
+ return self.samp_rate
+
+ def set_samp_rate(self, samp_rate):
+ self.blocks_rotator.set_phase_inc(
+ -2 * pi * self.shiftoff / samp_rate)
+ self.gsm_input.set_samp_rate_in(samp_rate)
+ self.phy.set_sample_rate(samp_rate)
+ self.samp_rate = samp_rate
+
+ def get_shiftoff(self):
+ return self.shiftoff
+
+ def set_shiftoff(self, shiftoff):
+ self.blocks_rotator.set_phase_inc(
+ -2 * pi * shiftoff / self.samp_rate)
+ self.phy.set_bandwidth(250e3 + abs(shiftoff), 0)
+ self.phy.set_center_freq(self.fc - shiftoff, 0)
+ self.shiftoff = shiftoff
diff --git a/apps/trx/udp_link.py b/apps/trx/udp_link.py
new file mode 100644
index 0000000..0d90ec9
--- /dev/null
+++ b/apps/trx/udp_link.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# GR-GSM based 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.decode())
+
+ def shutdown(self):
+ self.sock.close();
+
+ def send(self, data):
+ if type(data) not in [bytearray, bytes]:
+ data = data.encode()
+
+ self.sock.sendto(data, (self.remote_addr, self.remote_port))
+
+ def handle_rx(self, data):
+ raise NotImplementedError
diff --git a/grc/CMakeLists.txt b/grc/CMakeLists.txt
index 2b94539..045d6a5 100644
--- a/grc/CMakeLists.txt
+++ b/grc/CMakeLists.txt
@@ -23,6 +23,7 @@
add_subdirectory(receiver)
add_subdirectory(flow_control)
add_subdirectory(misc_utils)
+add_subdirectory(trx_interface)
install(FILES
gsm_block_tree.xml DESTINATION share/gnuradio/grc/blocks
)
diff --git a/grc/trx_interface/CMakeLists.txt b/grc/trx_interface/CMakeLists.txt
new file mode 100644
index 0000000..752b7a7
--- /dev/null
+++ b/grc/trx_interface/CMakeLists.txt
@@ -0,0 +1,22 @@
+# Copyright 2011,2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio 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 3, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+install(FILES
+ gsm_trx.xml DESTINATION share/gnuradio/grc/blocks
+)
diff --git a/grc/trx_interface/gsm_trx.xml b/grc/trx_interface/gsm_trx.xml
new file mode 100644
index 0000000..cbe268c
--- /dev/null
+++ b/grc/trx_interface/gsm_trx.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0"?>
+<block>
+ <name>TRX Interface</name>
+ <key>grgsm_trx_interface</key>
+ <import>import grgsm</import>
+ <make>grgsm.trx($remote_addr, $base_port)</make>
+
+ <param>
+ <name>base_port</name>
+ <key>base_port</key>
+ <value>5700</value>
+ <type>string</type>
+ </param>
+
+ <param>
+ <name>remote_addr</name>
+ <key>remote_addr</key>
+ <value>127.0.0.1</value>
+ <type>string</type>
+ </param>
+
+ <sink>
+ <name>bursts</name>
+ <type>message</type>
+ <optional>1</optional>
+ </sink>
+
+ <source>
+ <name>bursts</name>
+ <type>message</type>
+ <optional>1</optional>
+ </source>
+
+ <doc>
+ OsmoTRX like UDP interface for external applications.
+
+ There are three UDP sockets: CLCK, CTRL and DATA.
+ Give a base port B (5700 by default), the SCH clock
+ interface is at port P=B. The TRX-side control interface
+ is on port P=B+100+1 and the data interface is on an odd
+ numbered port P=B+100+2.
+
+ Indications on the SCH Clock Interface (CLCK)
+ The SCH clock interface is output only (from the radio).
+ CLOCK gives the current value of the BTS clock to
+ be used by external applications. The indications are
+ sent whenever a transmission packet arrives that is too
+ late or too early.
+
+ Commands on Control Interface (CTRL)
+ The control interface uses a command-response protocol.
+ Commands are NULL-terminated ASCII strings. Each command
+ has a corresponding response. This interface isn't handled
+ by this particular block, and should be implemented outside.
+
+ Messages on the Data Interface
+ Messages on the data interface carry one radio burst per
+ UDP message.
+
+ Received Data Burst:
+ 1 byte timeslot index
+ 4 bytes GSM frame number, big endian
+ 1 byte RSSI in -dBm
+ 2 bytes correlator timing offset in 1/256 symbol steps,
+ 2's-comp, big endian
+ 148 bytes soft symbol estimates, 0 -> definite "0",
+ 255 -> definite "1"
+
+ Transmit Data Burst:
+ 1 byte timeslot index
+ 4 bytes GSM frame number, big endian
+ 1 byte transmit level wrt ARFCN max, -dB (attenuation)
+ 148 bytes output symbol values, 0 & 1
+ </doc>
+</block>
diff --git a/include/grgsm/CMakeLists.txt b/include/grgsm/CMakeLists.txt
index d9b032d..1ce9134 100644
--- a/include/grgsm/CMakeLists.txt
+++ b/include/grgsm/CMakeLists.txt
@@ -35,3 +35,4 @@
add_subdirectory(misc_utils)
add_subdirectory(qa_utils)
add_subdirectory(flow_control)
+add_subdirectory(trx_interface)
diff --git a/include/grgsm/trx_interface/CMakeLists.txt b/include/grgsm/trx_interface/CMakeLists.txt
new file mode 100644
index 0000000..8d35ef7
--- /dev/null
+++ b/include/grgsm/trx_interface/CMakeLists.txt
@@ -0,0 +1,25 @@
+# Copyright 2011,2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio 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 3, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+########################################################################
+# Install public header files
+########################################################################
+install(FILES
+ trx.h DESTINATION include/grgsm/trx_interface
+)
diff --git a/include/grgsm/trx_interface/trx.h b/include/grgsm/trx_interface/trx.h
new file mode 100644
index 0000000..997ef62
--- /dev/null
+++ b/include/grgsm/trx_interface/trx.h
@@ -0,0 +1,63 @@
+/* -*- c++ -*- */
+/* @file
+ * @author Vadim Yanitskiy <axilirator@gmail.com>
+ * @section LICENSE
+ *
+ * Gr-gsm 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 3, or (at your option)
+ * any later version.
+ *
+ * Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef INCLUDED_GRGSM_TRX_H
+#define INCLUDED_GRGSM_TRX_H
+
+#include <grgsm/api.h>
+#include <gnuradio/sync_block.h>
+
+namespace gr {
+ namespace grgsm {
+
+ /*!
+ * \brief <+description of block+>
+ * \ingroup grgsm
+ *
+ */
+ class GRGSM_API trx : virtual public gr::block
+ {
+ public:
+ typedef boost::shared_ptr<trx> sptr;
+
+ /*!
+ * \brief Return a shared_ptr to a new instance of grgsm::trx.
+ *
+ * To avoid accidental use of raw pointers, grgsm::trx's
+ * constructor is in a private implementation
+ * class. grgsm::trx::make is the public interface for
+ * creating new instances.
+ */
+ static sptr make(
+ const std::string &remote_addr,
+ const std::string &base_port);
+
+ /* Expose internal timeslot filter API */
+ virtual void ts_filter_set_tn(int tn) = 0;
+ virtual int ts_filter_get_tn(void) = 0;
+ };
+
+ } // namespace grgsm
+} // namespace gr
+
+#endif /* INCLUDED_GRGSM_TRX_H */
+
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index e6dd115..c6bba6e 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -70,6 +70,8 @@
add_subdirectory(misc_utils)
add_subdirectory(qa_utils)
add_subdirectory(receiver)
+add_subdirectory(transmitter)
+add_subdirectory(trx_interface)
########################################################################
# Setup library
diff --git a/lib/trx_interface/trx_impl.cc b/lib/trx_interface/trx_impl.cc
new file mode 100644
index 0000000..2068da3
--- /dev/null
+++ b/lib/trx_interface/trx_impl.cc
@@ -0,0 +1,273 @@
+/* -*- c++ -*- */
+/* @file
+ * @author Vadim Yanitskiy <axilirator@gmail.com>
+ * @section LICENSE
+ *
+ * Gr-gsm 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 3, or (at your option)
+ * any later version.
+ *
+ * Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gnuradio/io_signature.h>
+#include <boost/lexical_cast.hpp>
+
+#include "udp_socket.h"
+#include "trx_impl.h"
+
+#define BURST_SIZE 148
+#define DATA_IF_MTU 160
+
+/**
+ * 41-bit RACH synchronization sequence
+ * GSM 05.02 Chapter 5.2.7 Access burst (AB)
+ */
+static uint8_t rach_synch_seq[] = {
+ 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1,
+ 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0,
+ 1, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0,
+};
+
+namespace gr {
+ namespace grgsm {
+
+ trx::sptr
+ trx::make(
+ const std::string &remote_addr,
+ const std::string &base_port)
+ {
+ int base_port_int = boost::lexical_cast<int> (base_port);
+
+ return gnuradio::get_initial_sptr
+ (new trx_impl(remote_addr, base_port_int));
+ }
+
+ /*
+ * The private constructor
+ */
+ trx_impl::trx_impl(const std::string &remote_addr, int base_port)
+ : gr::block("trx",
+ gr::io_signature::make(0, 0, 0),
+ gr::io_signature::make(0, 0, 0))
+ {
+ message_port_register_in(pmt::mp("bursts"));
+ message_port_register_out(pmt::mp("bursts"));
+
+ // Bind a port handler
+ set_msg_handler(pmt::mp("bursts"),
+ boost::bind(&trx_impl::handle_dl_burst, this, _1));
+
+ // Prepare port numbers
+ std::string clck_src_port = boost::lexical_cast<std::string> (base_port + 0);
+ std::string clck_dst_port = boost::lexical_cast<std::string> (base_port + 100);
+ std::string data_src_port = boost::lexical_cast<std::string> (base_port + 2);
+ std::string data_dst_port = boost::lexical_cast<std::string> (base_port + 102);
+
+ // Init DATA & CLCK interfaces
+ d_data_sock = new udp_socket(remote_addr,
+ data_src_port, data_dst_port, DATA_IF_MTU);
+ d_clck_sock = new udp_socket(remote_addr,
+ clck_src_port, clck_dst_port, DATA_IF_MTU);
+
+ // Bind DATA interface handler
+ d_data_sock->udp_rx_handler = boost::bind(
+ &trx_impl::handle_ul_burst, this, _1, _2);
+
+ // Init timeslot filter
+ d_ts_filter_tn = -1;
+ }
+
+ /*
+ * Our virtual destructor.
+ */
+ trx_impl::~trx_impl()
+ {
+ // Release all UDP sockets and free memory
+ delete d_data_sock;
+ delete d_clck_sock;
+ }
+
+ /*
+ * Timeslot filter API (getter and setter)
+ */
+ void
+ trx_impl::ts_filter_set_tn(int tn)
+ {
+ d_ts_filter_tn = (tn >= 0 && tn <= 7) ? tn : -1;
+ }
+
+ int
+ trx_impl::ts_filter_get_tn(void)
+ {
+ return d_ts_filter_tn;
+ }
+
+ /*
+ * Check if burst is a RACH burst
+ */
+ bool trx_impl::detect_rach(uint8_t *burst)
+ {
+ // Compare synchronization sequence
+ for (int i = 0; i < 41; i++)
+ if (burst[i + 8] != rach_synch_seq[i])
+ return false;
+
+ // Make sure TB and GP are filled by 0x00
+ for (int i = 0; i < 63; i++)
+ if (burst[i + 85] != 0x00)
+ return false;
+
+ return true;
+ }
+
+ /*
+ * Create an UDP payload with clock indication
+ */
+ void
+ trx_impl::clck_ind_send(uint32_t frame_nr)
+ {
+ char buf[20];
+ size_t n;
+
+ n = snprintf(buf, 20, "IND CLOCK %u", frame_nr);
+ d_clck_sock->udp_send((uint8_t *) buf, n + 1);
+ }
+
+ /*
+ * Create an UDP payload with burst bits
+ * and some channel data.
+ */
+ void
+ trx_impl::burst_pack(pmt::pmt_t msg, uint8_t *buf)
+ {
+ pmt::pmt_t header_plus_burst = pmt::cdr(msg);
+
+ // Extract GSMTAP header from message
+ gsmtap_hdr *header = (gsmtap_hdr *)
+ pmt::blob_data(header_plus_burst);
+
+ // Pack timeslot index
+ buf[0] = header->timeslot;
+
+ // Extract frame number
+ uint32_t frame_nr = be32toh(header->frame_number);
+
+ // HACK: send clock indications every 51-th frame
+ if (frame_nr % 51 == 0)
+ clck_ind_send(frame_nr);
+
+ // Pack frame number
+ buf[1] = (frame_nr >> 24) & 0xff;
+ buf[2] = (frame_nr >> 16) & 0xff;
+ buf[3] = (frame_nr >> 8) & 0xff;
+ buf[4] = (frame_nr >> 0) & 0xff;
+
+ // Pack RSSI (-dBm)
+ buf[5] = -(uint8_t) header->signal_dbm;
+
+ // Pack correlator timing offset (TOA)
+ // FIXME: where to find this value?
+ buf[6] = 0;
+ buf[7] = 0;
+
+ // Extract bits {0..1} from message
+ // Despite GR-GSM uses int8_t, they are not real sbits {-127..127}
+ uint8_t *burst = (uint8_t *)
+ (pmt::blob_data(header_plus_burst)) + sizeof(gsmtap_hdr);
+
+ // Convert to transceiver interface specific bits {255..0}
+ for (int i = 0; i < 148; i++)
+ buf[8 + i] = burst[i] ? 255 : 0;
+
+ // Fill two unused bytes
+ buf[156] = 0x00;
+ buf[157] = 0x00;
+ }
+
+ void
+ trx_impl::handle_dl_burst(pmt::pmt_t msg)
+ {
+ // 8 bytes of header + 148 bytes of burst
+ // + two unused, but required bytes
+ // otherwise bursts would be rejected
+ uint8_t buf[158];
+
+ // Compose a new UDP payload with burst
+ burst_pack(msg, buf);
+
+ // Timeslot filter
+ if (d_ts_filter_tn != -1 && buf[0] != d_ts_filter_tn)
+ return;
+
+ // Send a burst
+ d_data_sock->udp_send(buf, 158);
+ }
+
+ void
+ trx_impl::handle_ul_burst(uint8_t *payload, size_t len)
+ {
+ // Check length according to the protocol
+ if (len != 154)
+ return;
+
+ /* Make sure TS index is correct */
+ if (payload[0] >= 8)
+ return;
+
+ /* Unpack and check frame number */
+ uint32_t fn = (payload[1] << 24)
+ | (payload[2] << 16)
+ | (payload[3] << 8)
+ | payload[4];
+
+ if (fn >= 2715648)
+ return;
+
+ // Prepare a buffer for GSMTAP header and burst
+ uint8_t buf[sizeof(gsmtap_hdr) + BURST_SIZE];
+
+ // Set up pointer to GSMTAP header structure
+ struct gsmtap_hdr *header = (struct gsmtap_hdr *) buf;
+ memset(header, 0x00, sizeof(struct gsmtap_hdr));
+
+ // Fill in basic info
+ header->version = GSMTAP_VERSION;
+ header->hdr_len = sizeof(gsmtap_hdr) / 4;
+ header->type = GSMTAP_TYPE_UM_BURST;
+
+ // Set timeslot index and frame number
+ header->timeslot = payload[0];
+ header->frame_number = htobe32(fn);
+
+ // Check if one is a RACH burst
+ header->sub_type = detect_rach(payload + 6) ?
+ GSMTAP_BURST_ACCESS : GSMTAP_BURST_NORMAL;
+
+ // Copy burst bits (0 & 1) for source message
+ memcpy(buf + sizeof(gsmtap_hdr), payload + 6, BURST_SIZE);
+
+ // Create a pmt blob
+ pmt::pmt_t blob = pmt::make_blob(buf, sizeof(gsmtap_hdr) + BURST_SIZE);
+ pmt::pmt_t msg = pmt::cons(pmt::PMT_NIL, blob);
+
+ /* Send a message to the output */
+ message_port_pub(pmt::mp("bursts"), msg);
+ }
+
+ } /* namespace grgsm */
+} /* namespace gr */
diff --git a/lib/trx_interface/trx_impl.h b/lib/trx_interface/trx_impl.h
new file mode 100644
index 0000000..19e4848
--- /dev/null
+++ b/lib/trx_interface/trx_impl.h
@@ -0,0 +1,61 @@
+/* -*- c++ -*- */
+/* @file
+ * @author Vadim Yanitskiy <axilirator@gmail.com>
+ * @section LICENSE
+ *
+ * Gr-gsm 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 3, or (at your option)
+ * any later version.
+ *
+ * Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef INCLUDED_GRGSM_TRX_IMPL_H
+#define INCLUDED_GRGSM_TRX_IMPL_H
+
+#include <stddef.h>
+
+#include <grgsm/gsmtap.h>
+#include <grgsm/trx_interface/trx.h>
+
+namespace gr {
+ namespace grgsm {
+
+ class trx_impl : public trx
+ {
+ private:
+ udp_socket *d_data_sock;
+ udp_socket *d_clck_sock;
+ int d_ts_filter_tn;
+
+ bool detect_rach(uint8_t *burst);
+ void clck_ind_send(uint32_t frame_nr);
+ void burst_pack(pmt::pmt_t msg, uint8_t *buf);
+
+ public:
+ trx_impl(const std::string &remote_addr, int base_port);
+ ~trx_impl();
+
+ /* Timeslot filter API */
+ void ts_filter_set_tn(int tn);
+ int ts_filter_get_tn(void);
+
+ void handle_dl_burst(pmt::pmt_t msg);
+ void handle_ul_burst(uint8_t *payload, size_t len);
+ };
+
+ } // namespace grgsm
+} // namespace gr
+
+#endif /* INCLUDED_GRGSM_TRX_IMPL_H */
+
diff --git a/lib/trx_interface/udp_socket.cc b/lib/trx_interface/udp_socket.cc
new file mode 100644
index 0000000..be4bb66
--- /dev/null
+++ b/lib/trx_interface/udp_socket.cc
@@ -0,0 +1,119 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gnuradio/thread/thread.h>
+#include <gnuradio/io_signature.h>
+#include <gnuradio/blocks/pdu.h>
+#include <pmt/pmt.h>
+
+#include <boost/lexical_cast.hpp>
+#include "udp_socket.h"
+
+using boost::asio::ip::udp;
+
+namespace gr {
+ namespace grgsm {
+
+ udp_socket::udp_socket(
+ const std::string &remote_addr,
+ const std::string &src_port,
+ const std::string &dst_port,
+ size_t mtu)
+ {
+ // Resize receive buffer according to MTU value
+ d_rxbuf.resize(mtu);
+
+ // Resolve remote host address
+ udp::resolver resolver(d_io_service);
+
+ udp::resolver::query rx_query(
+ udp::v4(), remote_addr, src_port,
+ boost::asio::ip::resolver_query_base::passive);
+ udp::resolver::query tx_query(
+ udp::v4(), remote_addr, dst_port,
+ boost::asio::ip::resolver_query_base::passive);
+
+ d_udp_endpoint_rx = *resolver.resolve(rx_query);
+ d_udp_endpoint_tx = *resolver.resolve(tx_query);
+
+ // Create a socket
+ d_udp_socket.reset(new udp::socket(d_io_service, d_udp_endpoint_rx));
+
+ // Setup read handler
+ d_udp_socket->async_receive_from(
+ boost::asio::buffer(d_rxbuf), d_udp_endpoint_rx,
+ boost::bind(&udp_socket::handle_udp_read, this,
+ boost::asio::placeholders::error,
+ boost::asio::placeholders::bytes_transferred));
+
+ // Start server
+ d_thread = gr::thread::thread(
+ boost::bind(&udp_socket::run_io_service, this));
+ }
+
+ udp_socket::~udp_socket()
+ {
+ // Stop server
+ d_io_service.stop();
+ d_thread.interrupt();
+ d_thread.join();
+ }
+
+ void
+ udp_socket::run_io_service(void)
+ {
+ d_io_service.run();
+ }
+
+ void
+ udp_socket::udp_send(uint8_t *data, size_t len)
+ {
+ d_udp_socket->send_to(
+ boost::asio::buffer(data, len),
+ d_udp_endpoint_tx);
+ }
+
+ void
+ udp_socket::handle_udp_read(
+ const boost::system::error_code& error,
+ size_t bytes_transferred)
+ {
+ if (error)
+ return;
+
+ // Call incoming data handler
+ if (udp_rx_handler != NULL)
+ udp_rx_handler((uint8_t *) &d_rxbuf[0], bytes_transferred);
+
+ d_udp_socket->async_receive_from(
+ boost::asio::buffer(d_rxbuf), d_udp_endpoint_rx,
+ boost::bind(&udp_socket::handle_udp_read, this,
+ boost::asio::placeholders::error,
+ boost::asio::placeholders::bytes_transferred));
+ }
+
+ } /* namespace blocks */
+}/* namespace gr */
diff --git a/lib/trx_interface/udp_socket.h b/lib/trx_interface/udp_socket.h
new file mode 100644
index 0000000..5bcc42b
--- /dev/null
+++ b/lib/trx_interface/udp_socket.h
@@ -0,0 +1,69 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GRGSM_TRX_UDP_SOCKET_H
+#define INCLUDED_GRGSM_TRX_UDP_SOCKET_H
+
+#include <gnuradio/thread/thread.h>
+
+#include <boost/function.hpp>
+#include <boost/array.hpp>
+#include <boost/asio.hpp>
+#include <boost/bind.hpp>
+#include <pmt/pmt.h>
+
+namespace gr {
+ namespace grgsm {
+
+ class udp_socket
+ {
+ private:
+ boost::asio::io_service d_io_service;
+ std::vector<char> d_rxbuf;
+ gr::thread::thread d_thread;
+ bool d_started;
+ bool d_finished;
+
+ boost::asio::ip::udp::endpoint d_udp_endpoint_rx;
+ boost::asio::ip::udp::endpoint d_udp_endpoint_tx;
+ boost::shared_ptr<boost::asio::ip::udp::socket> d_udp_socket;
+
+ void handle_udp_read(const boost::system::error_code& error,
+ size_t bytes_transferred);
+ void run_io_service(void);
+
+ public:
+ udp_socket(
+ const std::string &remote_addr,
+ const std::string &src_port,
+ const std::string &dst_port,
+ size_t mtu);
+ ~udp_socket();
+
+ void udp_send(uint8_t *data, size_t len);
+ boost::function<void (uint8_t *, size_t)> udp_rx_handler;
+ };
+
+ } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GRGSM_TRX_UDP_SOCKET_H */
diff --git a/swig/grgsm_swig.i b/swig/grgsm_swig.i
index 66615e6..a67e264 100644
--- a/swig/grgsm_swig.i
+++ b/swig/grgsm_swig.i
@@ -64,6 +64,7 @@
#include "grgsm/misc_utils/message_file_source.h"
#include "grgsm/misc_utils/msg_to_tag.h"
#include "grgsm/misc_utils/controlled_fractional_resampler_cc.h"
+#include "grgsm/trx_interface/trx.h"
%}
%include "constants.i"
@@ -143,4 +144,5 @@
GR_SWIG_BLOCK_MAGIC2(gsm, message_source);
%include "grgsm/qa_utils/message_sink.h"
GR_SWIG_BLOCK_MAGIC2(gsm, message_sink);
-
+%include "grgsm/trx_interface/trx.h"
+GR_SWIG_BLOCK_MAGIC2(grgsm, trx);