Move object classes used by tests into obj/ subdir

Change-Id: I0b2963cf00acd1f9036dca2e87aa3b87a0f8066d
diff --git a/src/osmo_gsm_tester/obj/enb.py b/src/osmo_gsm_tester/obj/enb.py
new file mode 100644
index 0000000..bb5053f
--- /dev/null
+++ b/src/osmo_gsm_tester/obj/enb.py
@@ -0,0 +1,121 @@
+# osmo_gsm_tester: base classes to share code among eNodeB 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 ..core import log, config
+
+
+class eNodeB(log.Origin, metaclass=ABCMeta):
+
+##############
+# PROTECTED
+##############
+    def __init__(self, suite_run, conf, name):
+        super().__init__(log.C_RUN, '%s' % name)
+        self._conf = conf
+        self._addr = conf.get('addr', None)
+        if self._addr is None:
+            raise log.Error('addr not set')
+        self.set_name('%s_%s' % (name, self._addr))
+        self._txmode = 0
+        self._num_prb = 0
+        self._epc = None
+
+    def configure(self, config_specifics_li):
+        values = dict(enb=config.get_defaults('enb'))
+        for config_specifics in config_specifics_li:
+            config.overlay(values, dict(enb=config.get_defaults(config_specifics)))
+        config.overlay(values, dict(enb=self.suite_run.config().get('enb', {})))
+        for config_specifics in config_specifics_li:
+            config.overlay(values, dict(enb=self.suite_run.config().get(config_specifics, {})))
+        config.overlay(values, dict(enb=self._conf))
+        self._num_prb = int(values['enb'].get('num_prb', None))
+        assert self._num_prb
+        self._txmode = int(values['enb'].get('transmission_mode', None))
+        assert self._txmode
+        config.overlay(values, dict(enb={ 'num_ports': self.num_ports() }))
+        assert self._epc is not None
+        config.overlay(values, dict(enb={ 'mme_addr': self._epc.addr() }))
+        return values
+
+    def num_ports(self):
+        if self._txmode == 1:
+            return 1
+        return 2
+
+########################
+# PUBLIC - INTERNAL API
+########################
+    def cleanup(self):
+        'Nothing to do by default. Subclass can override if required.'
+        pass
+
+    def num_prb(self):
+        return self._num_prb
+
+###################
+# PUBLIC (test API included)
+###################
+    @abstractmethod
+    def start(self, epc):
+        'Starts ENB, it will connect to "epc"'
+        pass
+
+    @abstractmethod
+    def ue_add(self, ue):
+        pass
+
+    @abstractmethod
+    def running(self):
+        pass
+
+    @abstractmethod
+    def ue_max_rate(self, downlink=True):
+        pass
+
+    def addr(self):
+        return self._addr
+
+    def ue_max_rate(self, downlink=True):
+        # The max rate for a single UE per PRB configuration in TM1
+        max_phy_rate_tm1_dl = { 6 : 3.5e6,
+                               15 : 11e6,
+                               25 : 18e6,
+                               50 : 36e6,
+                               75 : 55e6,
+                               100 : 75e6 }
+        max_phy_rate_tm1_ul = { 6 : 0.9e6,
+                               15 : 4.7e6,
+                               25 : 10e6,
+                               50 : 23e6,
+                               75 : 34e6,
+                               100 : 51e6 }
+        if downlink:
+            max_rate = max_phy_rate_tm1_dl[self.num_prb()]
+        else:
+            max_rate = max_phy_rate_tm1_ul[self.num_prb()]
+        #TODO: calculate for non-standard prb numbers.
+        if self._txmode > 2:
+            max_rate *= 2
+        # We use 3 control symbols for 6, 15 and 25 PRBs which results in lower max rate
+        if self.num_prb() < 50:
+          max_rate *= 0.9
+        return max_rate
+
+# vim: expandtab tabstop=4 shiftwidth=4