Introduce support for AmarisoftEPC
* A new abstract generic base class EPC is created
* srsEPC and AmarisoftEPC inherit from that class
* options are loaded from defaults.conf in cascade. First generic "epc",
afterwards the specific enb type.
* A new scenario is added to select the EPC type to use. srsEPC is the
default unless stated by an scenario.
* AmarisoftEPC delegates setup of the tun IP address to an "ifup"
script. As a result, since we run without root permissions (ony with
CAP_NET_ADMIN), the ifup script itself is unablet o set the IP
address. To solve this, we introduce a new osmo-gsm-tester helper
script which must be installed in the slave node which can be called
through sudo to increase privileges to do so.
With this commit, I can already get srsUE<->amarisoftENB<->amarisoftEPC
to pass ping and iperf3 4g tests.
Change-Id: Ia50ea6a74b63b2d688c8d683aea11416ad40a6d3
diff --git a/src/osmo_gsm_tester/epc.py b/src/osmo_gsm_tester/epc.py
new file mode 100644
index 0000000..da8302c
--- /dev/null
+++ b/src/osmo_gsm_tester/epc.py
@@ -0,0 +1,80 @@
+# osmo_gsm_tester: base classes to share code among EPC subclasses.
+#
+# 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/>.
+
+from abc import ABCMeta, abstractmethod
+from . import log, config
+
+
+class EPC(log.Origin, metaclass=ABCMeta):
+
+##############
+# PROTECTED
+##############
+ def __init__(self, suite_run, run_node, name):
+ super().__init__(log.C_RUN, '%s' % name)
+ self._addr = run_node.run_addr()
+ self.set_name('%s_%s' % (name, self._addr))
+ self.suite_run = suite_run
+ self._run_node = run_node
+
+ def configure(self, default_specifics):
+ values = dict(epc=config.get_defaults('epc'))
+ config.overlay(values, dict(epc=config.get_defaults(default_specifics)))
+ config.overlay(values, dict(epc=self.suite_run.config().get('epc', {})))
+ config.overlay(values, dict(epc={'run_addr': self.addr()}))
+ return values
+
+########################
+# PUBLIC - INTERNAL API
+########################
+ def cleanup(self):
+ 'Nothing to do by default. Subclass can override if required.'
+ pass
+
+###################
+# PUBLIC (test API included)
+###################
+ @abstractmethod
+ def start(self, epc):
+ 'Starts ENB, it will connect to "epc"'
+ pass
+
+ @abstractmethod
+ def subscriber_add(self, modem, msisdn=None, algo_str=None):
+ pass
+
+ @abstractmethod
+ def enb_is_connected(self, enb):
+ pass
+
+ @abstractmethod
+ def running(self):
+ pass
+
+ @abstractmethod
+ def tun_addr(self):
+ pass
+
+ def addr(self):
+ return self._addr
+
+ def run_node(self):
+ return self._run_node
+
+# vim: expandtab tabstop=4 shiftwidth=4