| # osmo_gsm_tester: class defining a RF emulation object implemented using SRS ENB stdin interface |
| # |
| # Copyright (C) 2020 by sysmocom - s.f.m.c. GmbH |
| # |
| # Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| # |
| # 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 3 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, see <http://www.gnu.org/licenses/>. |
| |
| import json |
| import socket |
| |
| from ..core import log |
| from ..core import util |
| from ..core import process |
| from ..core import remote |
| from ..core.event_loop import MainLoop |
| from .rfemu import RFemulation |
| |
| |
| class GrBroker(log.Origin): |
| |
| # static fields: |
| refcount = 0 |
| instance = None |
| |
| def __init__(self): |
| super().__init__(log.C_RUN, 'zmq_gr_broker') |
| self.process = None |
| self.ctrl_port = 5005 |
| self.run_dir = None |
| self.rem_host = None |
| self.cfg = None |
| self.enb = None |
| self.addr = None |
| self.ctrl_sk = None |
| |
| @staticmethod |
| def ref(): |
| if GrBroker.refcount == 0: |
| GrBroker.instance = GrBroker() |
| GrBroker.refcount = GrBroker.refcount + 1 |
| return GrBroker.instance |
| |
| @staticmethod |
| def unref(): |
| GrBroker.refcount = GrBroker.refcount - 1 |
| if GrBroker.refcount == 0: |
| GrBroker.instance.cleanup() |
| GrBroker.instance = None |
| |
| |
| def cleanup(self): |
| if self.ctrl_sk is not None: |
| self.cmd_exit() |
| self.ctrl_sk.close() |
| self.ctrl_sk = None |
| self.enb = None |
| self.testenv = None |
| |
| def handle_enb(self, enb): |
| self.enb = enb |
| self.addr = self.enb.addr() |
| self.testenv = self.enb.testenv |
| self.cfg = self.gen_json(enb) |
| # FIXME: we may need to delay this somehow if we want to support several ENBs |
| self.start() |
| self.setup() |
| |
| def gen_json_enb(self, enb): |
| res = [] |
| cell_list = enb.gen_conf['enb']['cell_list'] |
| for cell in cell_list: |
| # TODO: probably add enb_id, cell_id to support several ENB |
| data = {'earfcn': int(cell['dl_earfcn']), |
| 'bind_port': int(cell['zmq_enb_peer_port']), |
| 'peer_addr': enb.addr(), |
| 'peer_port': int(cell['zmq_enb_bind_port']), |
| 'use_mimo': True if enb.num_ports() > 1 else False |
| } |
| res.append(data) |
| return res |
| |
| def gen_json_ue(self, enb): |
| res = {} |
| res = [] |
| earfcns_done = [] |
| cell_list = enb.gen_conf['enb']['cell_list'] |
| for cell in cell_list: |
| data = {} |
| if int(cell['dl_earfcn']) in earfcns_done: |
| continue |
| earfcns_done.append(int(cell['dl_earfcn'])) |
| data = {'earfcn': int(cell['dl_earfcn']), |
| 'bind_port': int(cell['zmq_ue_peer_port']), |
| 'peer_addr': enb.ue.addr(), |
| 'peer_port': int(cell['zmq_ue_bind_port']), |
| 'use_mimo': True if enb.num_ports() > 1 else False |
| } |
| res.append(data) |
| return res |
| |
| def gen_json(self, enb): |
| res = {'enb': [self.gen_json_enb(enb)], |
| 'ue': [self.gen_json_ue(enb)]} |
| return res |
| |
| def start(self): |
| self.run_dir = util.Dir(self.testenv.test().get_run_dir().new_dir(self.name())) |
| |
| args = ('osmo-gsm-tester_zmq_broker.py', |
| '-c', str(self.ctrl_port), |
| '-b', self.enb.addr()) |
| |
| if self.enb._run_node.is_local(): |
| self.process = process.Process(self.name(), self.run_dir, args) |
| else: |
| self.rem_host = remote.RemoteHost(self.run_dir, self.enb._run_node.ssh_user(), self.enb._run_node.ssh_addr()) |
| self.process = self.rem_host.RemoteProcessSafeExit('zmq_gr_broker', util.Dir('/tmp/ogt_%s' % self.name()), args, wait_time_sec=7) |
| self.testenv.remember_to_stop(self.process) |
| self.process.launch() |
| |
| def setup(self): |
| self.dbg('waiting for gr script to be available...') |
| MainLoop.sleep(5) |
| self.ctrl_sk = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
| buf = json.dumps(self.cfg) |
| self.send_cmd(buf) |
| |
| def send_cmd(self, str_buf): |
| self.dbg('sending cmd: "%s"' % str_buf) |
| self.ctrl_sk.sendto(str_buf.encode('utf-8'), (self.addr, self.ctrl_port)) |
| |
| def cmd_set_relative_gain_on_local_port(self, port, rel_gain): |
| d = { 'action': 'set_relative_gain', |
| 'port': port, |
| 'rel_gain': rel_gain |
| } |
| buf = json.dumps(d) |
| self.send_cmd(buf) |
| |
| def cmd_exit(self): |
| d = { 'action': 'exit' } |
| buf = json.dumps(d) |
| self.send_cmd(buf) |
| |
| class RFemulationGnuradioZmq(RFemulation): |
| ############## |
| # PROTECTED |
| ############## |
| def __init__(self, conf): |
| super().__init__(conf, 'gnuradio_zmq') |
| self.broker = None |
| self.ctrl_port = 5005 |
| self.cell_id = int(conf.get('cell_id')) |
| if self.cell_id is None: |
| raise log.Error('No "cell_id" attribute provided in rfemu conf!') |
| self.enb = conf.get('enb') |
| if self.enb is None: |
| raise log.Error('No "srsenb" attribute provided in rfemu conf!') |
| self.set_name('%s_%s_%d' % (self.name(), self.enb.name(), self.cell_id)) |
| self.testenv = self.enb.testenv |
| self.configure() |
| |
| def __del__(self): |
| if self.broker: |
| self.broker.unref() |
| self.broker = None |
| self.enb = None |
| self.testenv = None |
| |
| def configure(self): |
| self.broker = GrBroker.ref() |
| |
| ############################# |
| # PUBLIC (test API included) |
| ############################# |
| def set_attenuation(self, db): |
| for cell in self.enb.gen_conf['enb']['cell_list']: |
| if int(cell['cell_id']) == self.cell_id: |
| # convert negative dB to amplitude |
| amp = pow(10, -db/20.0) |
| self.broker.cmd_set_relative_gain_on_local_port(cell['zmq_enb_peer_port'], amp) |
| break |
| |
| def get_max_attenuation(self): |
| return 200 |
| |
| # vim: expandtab tabstop=4 shiftwidth=4 |