Add python client which converts TRAP messages into SOAP requests and perform corresponding actions. It can be used as follows ./soap.py -d -w http://example.com/soapservice/htdocs/wsdl/test.wsdl See ./soap.py -h for additional options. Change-Id: I82844ec7a302bac30d6daee9ebca2188fd48ca46 Related: SYS#3028changes/45/3445/1
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#!/usr/bin/python3 |
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# -*- mode: python-mode; py-indent-tabs-mode: nil -*- |
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""" |
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/* |
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* Copyright (C) 2016 sysmocom s.f.m.c. GmbH |
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* |
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* All Rights Reserved |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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""" |
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|
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__version__ = "v0.7" # bump this on every non-trivial change |
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from twisted.internet import defer, reactor |
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from twisted_ipa import CTRL, IPAFactory, __version__ as twisted_ipa_version |
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from ipa import Ctrl |
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from treq import post, collect |
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from suds.client import Client |
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from functools import partial |
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from distutils.version import StrictVersion as V # FIXME: use NormalizedVersion from PEP-386 when available |
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import argparse, datetime, signal, sys, os, logging, logging.handlers |
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# we don't support older versions of TwistedIPA module |
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assert V(twisted_ipa_version) > V('0.4') |
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# keys from OpenBSC openbsc/src/libbsc/bsc_rf_ctrl.c, values SOAP-specific |
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oper = { 'inoperational' : 0, 'operational' : 1 } |
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admin = { 'locked' : 0, 'unlocked' : 1 } |
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policy = { 'off' : 0, 'on' : 1, 'grace' : 2, 'unknown' : 3 } |
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|
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# keys from OpenBSC openbsc/src/libbsc/bsc_vty.c |
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fix = { 'invalid' : 0, 'fix2d' : 1, 'fix3d' : 1 } # SOAP server treats it as boolean but expects int |
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def handle_reply(p, f, log, r): |
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""" |
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Reply handler: takes function p to process raw SOAP server reply r, function f to run for each command and verbosity flag v |
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""" |
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repl = p(r) # result is expected to have both commands[] array and error string (could be None) |
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bsc_id = repl.commands[0].split()[0].split('.')[3] # we expect 1st command to have net.0.bsc.666.bts.2.trx.1 location prefix format |
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log.info("Received SOAP response for BSC %s with %d commands, error status: %s" % (bsc_id, len(repl.commands), repl.error)) |
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log.debug("BSC %s commands: %s" % (bsc_id, repl.commands)) |
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for t in repl.commands: # Process OpenBscCommands format from .wsdl |
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(_, m) = Ctrl().cmd(*t.split()) |
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f(m) |
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class Trap(CTRL): |
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""" |
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TRAP handler (agnostic to factory's client object) |
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""" |
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def ctrl_TRAP(self, data, op_id, v): |
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""" |
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Parse CTRL TRAP and dispatch to appropriate handler after normalization |
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""" |
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(l, r) = v.split() |
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loc = l.split('.') |
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t_type = loc[-1] |
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p = partial(lambda a, i: a[i] if len(a) > i else None, loc) # parse helper |
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method = getattr(self, 'handle_' + t_type.replace('-', ''), lambda: "Unhandled %s trap" % t_type) |
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method(p(1), p(3), p(5), p(7), r) # we expect net.0.bsc.666.bts.2.trx.1 format for trap prefix |
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def ctrl_SET_REPLY(self, data, _, v): |
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""" |
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Debug log for replies to our commands |
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""" |
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self.factory.log.debug('SET REPLY %s' % v) |
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def ctrl_ERROR(self, data, op_id, v): |
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""" |
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We want to know if smth went wrong |
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""" |
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self.factory.log.debug('CTRL ERROR [%s] %s' % (op_id, v)) |
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def connectionMade(self): |
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""" |
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Logging wrapper, calling super() is necessary not to break reconnection logic |
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""" |
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self.factory.log.info("Connected to CTRL@%s:%d" % (self.factory.host, self.factory.port)) |
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super(CTRL, self).connectionMade() |
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@defer.inlineCallbacks |
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def handle_locationstate(self, net, bsc, bts, trx, data): |
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""" |
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Handle location-state TRAP: parse trap content, build SOAP context and use treq's routines to post it while setting up async handlers |
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""" |
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(ts, fx, lat, lon, height, opr, adm, pol, mcc, mnc) = data.split(',') |
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tstamp = datetime.datetime.fromtimestamp(float(ts)).isoformat() |
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self.factory.log.debug('location-state@%s.%s.%s.%s (%s) [%s/%s] => %s' % (net, bsc, bts, trx, tstamp, mcc, mnc, data)) |
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ctx = self.factory.client.registerSiteLocation(bsc, float(lon), float(lat), fix.get(fx, 0), tstamp, oper.get(opr, 2), admin.get(adm, 2), policy.get(pol, 3)) |
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d = post(self.factory.location, ctx.envelope) |
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d.addCallback(collect, partial(handle_reply, ctx.process_reply, self.transport.write, self.factory.log)) # treq's collect helper is handy to get all reply content at once using closure on ctx |
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d.addErrback(lambda e, bsc: self.factory.log.critical("HTTP POST error %s while trying to register BSC %s" % (e, bsc)), bsc) # handle HTTP errors |
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# Ensure that we run only limited number of requests in parallel: |
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yield self.factory.semaphore.acquire() |
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yield d # we end up here only if semaphore is available which means it's ok to fire the request without exceeding the limit |
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self.factory.semaphore.release() |
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def handle_notificationrejectionv1(self, net, bsc, bts, trx, data): |
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""" |
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Handle notification-rejection-v1 TRAP: just an example to show how more message types can be handled |
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""" |
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self.factory.log.debug('notification-rejection-v1@bsc-id %s => %s' % (bsc, data)) |
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class TrapFactory(IPAFactory): |
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""" |
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Store SOAP client object so TRAP handler can use it for requests |
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""" |
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location = None |
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log = None |
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semaphore = None |
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client = None |
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host = None |
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port = None |
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def __init__(self, host, port, proto, semaphore, log, wsdl=None, location=None): |
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self.host = host # for logging only, |
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self.port = port # seems to be no way to get it from ReconnectingClientFactory |
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self.log = log |
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self.semaphore = semaphore |
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soap = Client(wsdl, location=location, nosend=True) # make async SOAP client |
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self.location = location.encode() if location else soap.wsdl.services[0].ports[0].location # necessary for dispatching HTTP POST via treq |
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self.client = soap.service |
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level = self.log.getEffectiveLevel() |
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self.log.setLevel(logging.WARNING) # we do not need excessive debug from lower levels |
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super(TrapFactory, self).__init__(proto, self.log) |
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self.log.setLevel(level) |
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self.log.debug("Using IPA %s, SUDS client: %s" % (Ctrl.version, soap)) |
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def reloader(path, script, log, dbg1, dbg2, signum, _): |
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""" |
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Signal handler: we have to use execl() because twisted's reactor is not restartable due to some bug in twisted implementation |
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""" |
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log.info("Received Signal %d - restarting..." % signum) |
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if signum == signal.SIGUSR1 and dbg1 not in sys.argv and dbg2 not in sys.argv: |
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sys.argv.append(dbg1) # enforce debug |
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if signum == signal.SIGUSR2 and (dbg1 in sys.argv or dbg2 in sys.argv): # disable debug |
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if dbg1 in sys.argv: |
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sys.argv.remove(dbg1) |
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if dbg2 in sys.argv: |
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sys.argv.remove(dbg2) |
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os.execl(path, script, *sys.argv[1:]) |
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if __name__ == '__main__': |
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p = argparse.ArgumentParser(description='Proxy between given SOAP service and Osmocom CTRL protocol.') |
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p.add_argument('-v', '--version', action='version', version=("%(prog)s " + __version__)) |
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p.add_argument('-p', '--port', type=int, default=4250, help="Port to use for CTRL interface, defaults to 4250") |
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p.add_argument('-c', '--ctrl', default='localhost', help="Adress to use for CTRL interface, defaults to localhost") |
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p.add_argument('-w', '--wsdl', required=True, help="WSDL URL for SOAP") |
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p.add_argument('-n', '--num', type=int, default=5, help="Max number of concurrent HTTP requests to SOAP server") |
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p.add_argument('-d', '--debug', action='store_true', help="Enable debug log") |
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p.add_argument('-o', '--output', action='store_true', help="Log to STDOUT in addition to SYSLOG") |
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p.add_argument('-l', '--location', help="Override location found in WSDL file (don't use unless you know what you're doing)") |
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args = p.parse_args() |
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log = logging.getLogger('CTRL2SOAP') |
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if args.debug: |
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log.setLevel(logging.DEBUG) |
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else: |
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log.setLevel(logging.INFO) |
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log.addHandler(logging.handlers.SysLogHandler('/dev/log')) |
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if args.output: |
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log.addHandler(logging.StreamHandler(sys.stdout)) |
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reboot = partial(reloader, os.path.abspath(__file__), os.path.basename(__file__), log, '-d', '--debug') # keep in sync with add_argument() call above |
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signal.signal(signal.SIGHUP, reboot) |
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signal.signal(signal.SIGQUIT, reboot) |
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signal.signal(signal.SIGUSR1, reboot) # restart and enabled debug output |
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signal.signal(signal.SIGUSR2, reboot) # restart and disable debug output |
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log.info("SOAP proxy %s starting with PID %d ..." % (__version__, os.getpid())) |
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reactor.connectTCP(args.ctrl, args.port, TrapFactory(args.ctrl, args.port, Trap, defer.DeferredSemaphore(args.num), log, args.wsdl, args.location)) |
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reactor.run() |
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