def _start(self, process):
try:
if process in self._process:
self.logger.processes("process already running")
return
if not process in self.reactor.configuration.process:
self.logger.processes(
"Can not start process, no configuration for it (anymore ?)"
)
return
# Prevent some weird termcap data to be created at the start of the PIPE
# \x1b[?1034h (no-eol) (esc)
os.environ['TERM'] = 'dumb'
run = self.reactor.configuration.process[process].get('run', '')
if run:
api = self.reactor.configuration.process[process]['encoder']
self._api_encoder[process] = JSON(
'2.0') if api == 'json' else Text('1.0')
self._process[process] = subprocess.Popen(
run,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
preexec_fn=preexec_helper
# This flags exists for python 2.7.3 in the documentation but on on my MAC
# creationflags=subprocess.CREATE_NEW_PROCESS_GROUP
)
fcntl.fcntl(self._process[process].stdout.fileno(),
fcntl.F_SETFL, os.O_NONBLOCK)
self.logger.processes("Forked process %s" % process)
around_now = int(time.time()) & self.respawn_timemask
if process in self._respawning:
if around_now in self._respawning[process]:
self._respawning[process][around_now] += 1
# we are respawning too fast
if self._respawning[process][
around_now] > self.respawn_number:
self.logger.processes(
"Too many respawn for %s (%d) terminating program"
% (process, self.respawn_number), 'critical')
raise ProcessError()
else:
# reset long time since last respawn
self._respawning[process] = {around_now: 1}
else:
# record respawing
self._respawning[process] = {around_now: 1}
neighbor = self.reactor.configuration.process[process]['neighbor']
self._neighbor_process.setdefault(neighbor, []).append(process)
except (subprocess.CalledProcessError, OSError, ValueError), e:
self._broken.append(process)
self.logger.processes("Could not start process %s" % process)
self.logger.processes("reason: %s" % str(e))
def setup(self, env, ip, port):
self.handle = {
Message.ROUTE_MONITORING: self._route,
Message.STATISTICS_REPORT: self._statistics,
Message.PEER_DOWN_NOTIFICATION: self._peer,
}
self.asn4 = env.bmp.asn4
self.use_json = env.bmp.json
self.fd = env.fd
self.ip = ip
self.port = port
self.json = JSON('3.4.8')
return self
# This does not take the BGP header - let's assume we will not break that :)
update = Update.unpack_message(injected,negotiated)
except KeyboardInterrupt:
raise
except Notify,exc:
logger.parser('could not parse the message','error')
logger.parser(str(exc),'error')
return False
except Exception,exc:
logger.parser('could not parse the message','error')
logger.parser(str(exc),'error')
return False
logger.parser('') # new line
for number in range(len(update.nlris)):
change = Change(update.nlris[number],update.attributes)
logger.parser('decoded %s %s %s' % (decoding,change.nlri.action,change.extensive()))
logger.parser('update json %s' % JSON('3.4.0').update(p,update,'',''))
return True
# ================================================================= check_update
#
def check_notification (raw):
notification = Notification.unpack_message(raw[18:],None)
# XXX: FIXME: should be using logger here
print notification
return True
raise
except Notify, e:
logger.parser('could not parse the message')
logger.parser(str(e))
return False
except Exception, e:
logger.parser('could not parse the message')
logger.parser(str(e))
return False
logger.parser('') # new line
for number in range(len(update.nlris)):
change = Change(update.nlris[number], update.attributes)
logger.parser('decoded %s %s %s' %
(decoding, change.nlri.action, change.extensive()))
logger.parser('update json %s' %
JSON('3.4.0').update(p, update, '', ''))
return True
# ================================================================= check_update
#
def check_notification(raw):
notification = Notification.unpack_message(raw[18:], None)
# XXX: FIXME: should be using logger here
print notification
return True
except Notify, exc:
logger.parser('could not parse the message')
logger.parser(str(exc))
return False
except Exception, exc:
logger.parser('could not parse the message')
logger.parser(str(exc))
return False
logger.parser('') # new line
for number in range(len(update.nlris)):
change = Change(update.nlris[number], update.attributes)
logger.parser('decoded %s %s %s' %
(decoding, change.nlri.action, change.extensive()))
logger.parser(
'update json %s' %
JSON(json_version).update(p.neighbor, 'in', update, '', ''))
return True
# ================================================================= check_update
#
def check_notification(raw):
notification = Notification.unpack_message(raw[18:], None)
# XXX: FIXME: should be using logger here
print notification
return True
raise
except Notify, exc:
logger.parser('could not parse the message')
logger.parser(str(exc))
return False
except Exception, exc:
logger.parser('could not parse the message')
logger.parser(str(exc))
return False
logger.parser('') # new line
for number in range(len(update.nlris)):
change = Change(update.nlris[number], update.attributes)
logger.parser('decoded %s %s %s' %
(decoding, change.nlri.action, change.extensive()))
logger.parser('update json %s' %
JSON(json_version).update(p, update, '', ''))
return True
# ================================================================= check_update
#
def check_notification(raw):
notification = Notification.unpack_message(raw[18:], None)
# XXX: FIXME: should be using logger here
print notification
return True
class Transcoder(object):
seen_open = {
'send': None,
'receive': None,
}
negotiated = None
json = JSON(json_version)
def __init__(self, src='json', dst='json'):
if src != 'json':
raise RuntimeError('left as an exercise to the reader')
if dst != 'json':
raise RuntimeError('left as an exercise to the reader')
self.convert = self._from_json
self.encoder = self.json
def _state(self):
self.seen_open['send'] = None
self.seen_open['receive'] = None
self.negotiated = None
def _open(self, direction, message):
self.seen_open[direction] = message
if all(self.seen_open.values()):
self.negotiated = Negotiated(None)
self.negotiated.sent(self.seen_open['send'])
self.negotiated.received(self.seen_open['receive'])
def _from_json(self, string):
try:
parsed = json.loads(string)
except ValueError:
print >> sys.stderr, 'invalid JSON message'
sys.exit(1)
if parsed.get('exabgp', '0.0.0') != json_version:
print >> sys.stderr, 'invalid json version', string
sys.exit(1)
content = parsed.get('type', '')
if not content:
print >> sys.stderr, 'invalid json content', string
sys.exit(1)
neighbor = _FakeNeighbor(
parsed['neighbor']['address']['local'],
parsed['neighbor']['address']['peer'],
parsed['neighbor']['asn']['local'],
parsed['neighbor']['asn']['peer'],
)
if content == 'state':
self._state()
return string
direction = parsed['neighbor']['direction']
category = parsed['neighbor']['message']['category']
header = parsed['neighbor']['message']['header']
body = parsed['neighbor']['message']['body']
raw = ''.join(
chr(int(body[_:_ + 2], 16)) for _ in range(0, len(body), 2))
if content == 'open':
message = Open.unpack_message(raw)
self._open(direction, message)
return self.encoder.open(neighbor, direction, message, header,
body)
if content == 'keapalive':
return self.encoder.keepalive(neighbor, direction, header, body)
if content == 'notification':
return self.encoder.notification(neighbor, direction,
ord(message[0]), ord(message[1]),
message[2:], header, body)
if not self.negotiated:
print >> sys.stderr, 'invalid message sequence, open not exchange not complete', string
sys.exit(1)
message = Message.unpack(category, raw, self.negotiated)
if content == 'update':
return self.encoder.update(neighbor, direction, message, header,
body)
if content == 'eor': # XXX: Should not be required
return self.encoder.update(neighbor, direction, message, header,
body)
if content == 'refresh':
return self.json.refresh(neighbor, direction, message, header,
body)
if content == 'operational':
return self.json.refresh(neighbor, direction, message, header,
body)
raise RuntimeError(
'the programer is a monkey and forgot a JSON message type')
