def __init__ (self, neighbor, reactor):
try:
self.logger = Logger()
# We only to try to connect via TCP once
self.once = environment.settings().tcp.once
self.bind = True if environment.settings().tcp.bind else False
except RuntimeError:
self.logger = FakeLogger()
self.once = True
self.reactor = reactor
self.neighbor = neighbor
# The next restart neighbor definition
self._neighbor = None
# The peer should restart after a stop
self._restart = True
# The peer was restarted (to know what kind of open to send for graceful restart)
self._restarted = FORCE_GRACEFUL
self._reset_skip()
# We want to remove routes which are not in the configuration anymote afte a signal to reload
self._reconfigure = True
# We want to send all the known routes
self._resend_routes = SEND.DONE
# We have new routes for the peers
self._have_routes = True
# We have been asked to teardown the session with this code
self._teardown = None
# This skipping business should have its own class, like KA
self._skip_time = None
self._next_skip = 0
self.recv_timer = None
self._ = {'in':{},'out':{}}
self._['in']['state'] = STATE.IDLE
self._['out']['state'] = STATE.IDLE
# value to reset 'generator' to
self._['in']['enabled'] = False
self._['out']['enabled'] = None if not self.neighbor.passive else False
# the networking code
self._['out']['proto'] = None
self._['in']['proto'] = None
# the networking code
self._['out']['code'] = self._connect
self._['in']['code'] = self._accept
# the generator used by the main code
# * False, the generator for this direction is down
# * Generator, the code to run to connect or accept the connection
# * None, the generator must be re-created
self._['in']['generator'] = self._['in']['enabled']
self._['out']['generator'] = self._['out']['enabled']
def __init__ (self,configuration):
self.ip = environment.settings().tcp.bind
self.port = environment.settings().tcp.port
self.max_loop_time = environment.settings().reactor.speed
self.half_loop_time = self.max_loop_time / 2
self.logger = Logger()
self.daemon = Daemon(self)
self.processes = None
self.listener = None
self.configuration = Configuration(configuration)
self._peers = {}
self._shutdown = False
self._reload = False
self._reload_processes = False
self._restart = False
self._route_update = False
self._saved_pid = False
self._commands = []
self._pending = []
signal.signal(signal.SIGTERM, self.sigterm)
signal.signal(signal.SIGHUP, self.sighup)
signal.signal(signal.SIGALRM, self.sigalrm)
signal.signal(signal.SIGUSR1, self.sigusr1)
signal.signal(signal.SIGUSR2, self.sigusr2)
def debug_check_route (self): # we are not really running the program, just want to .... if environment.settings().debug.route: from exabgp.configuration.check import check_message if check_message(self.neighbors,environment.settings().debug.route): sys.exit(0) sys.exit(1)
def __init__ (self, configurations):
self._ips = environment.settings().tcp.bind
self._port = environment.settings().tcp.port
self._stopping = environment.settings().tcp.once
self.exit_code = self.Exit.unknown
self.max_loop_time = environment.settings().reactor.speed
self._sleep_time = self.max_loop_time / 100
self._busyspin = {}
self.early_drop = environment.settings().daemon.drop
self.processes = None
self.configuration = Configuration(configurations)
self.logger = Logger()
self.asynchronous = ASYNC()
self.signal = Signal()
self.daemon = Daemon(self)
self.listener = Listener(self)
self.api = API(self)
self.peers = {}
self._reload_processes = False
self._saved_pid = False
def __init__ (self,afi,peer,local): # peer and local are strings of the IP # If the OS tells us we have data on the socket, we should never have to wait more than read_timeout to be able to read it. # However real life says that on some OS we do ... So let the user control this value try: self.read_timeout = environment.settings().tcp.timeout self.defensive = environment.settings().debug.defensive self.logger = Logger() except RuntimeError: self.read_timeout = 1 self.defensive = True self.logger = FakeLogger() self.afi = afi self.peer = peer self.local = local self._reading = None self._writing = None self._buffer = '' self.io = None self.established = False self.identifier += 1 self.id = self.identifier
def _reload (self): # taking the first configuration available (FIFO buffer) fname = self._configurations.pop(0) self.process.configuration(fname) self._configurations.append(fname) # clearing the current configuration to be able to re-parse it self._clear() if not self.tokens.set_file(fname): return False # parsing the configuration r = False while not self.tokens.finished: r = self._dispatch( self._scope,'root','configuration', self._tree['configuration'].keys(), [] ) if r is False: break # handling possible parsing errors if r not in [True,None]: # making sure nothing changed self.neighbor.cancel() return self.error.set( "\n" "syntax error in section %s\n" "line %d: %s\n" "\n%s" % ( self._location[-1], self.tokens.number, ' '.join(self.tokens.line), str(self.error) ) ) # installing in the neighbor the API routes self.neighbor.complete() # we are not really running the program, just want to .... if environment.settings().debug.route: from exabgp.configuration.current.check import check_message if check_message(self.neighbor.neighbors,environment.settings().debug.route): sys.exit(0) sys.exit(1) # we are not really running the program, just want check the configuration validity if environment.settings().debug.selfcheck: from exabgp.configuration.current.check import check_neighbor if check_neighbor(self.neighbor.neighbors): sys.exit(0) sys.exit(1) return True
def __init__ (self):
self.logger = Logger()
self.clean()
self.silence = False
self._buffer = {}
self._configuration = {}
self.respawn_number = 5 if environment.settings().api.respawn else 0
self.terminate_on_error = environment.settings().api.terminate
self.ack = environment.settings().api.ack
def _reload (self):
# taking the first configuration available (FIFO buffer)
fname = self._configurations.pop(0)
self.process.configuration(fname)
self._configurations.append(fname)
# storing the routes associated with each peer so we can find what changed
backup_changes = {}
for neighbor in self._neighbors:
backup_changes[neighbor] = self._neighbors[neighbor].changes
# clearing the current configuration to be able to re-parse it
self._clear()
if not self.tokens.set_file(fname):
return False
# parsing the configurtion
r = False
while not self.tokens.finished:
r = self._dispatch(
self._scope,'configuration',
['group','neighbor'],
[]
)
if r is False:
break
# handling possible parsing errors
if r not in [True,None]:
return self.error.set("\nsyntax error in section %s\nline %d: %s\n\n%s" % (self._location[-1],self.tokens.number,' '.join(self.tokens.line),self.error))
# parsing was sucessful, assigning the result
self.neighbors = self._neighbors
# installing in the neighbor what was its previous routes so we can
# add/withdraw what need to be
for neighbor in self.neighbors:
self.neighbors[neighbor].backup_changes = backup_changes.get(neighbor,[])
# we are not really running the program, just want to ....
if environment.settings().debug.route:
from exabgp.configuration.check import check_message
if check_message(self.neighbors,environment.settings().debug.route):
sys.exit(0)
sys.exit(1)
# we are not really running the program, just want check the configuration validity
if environment.settings().debug.selfcheck:
from exabgp.configuration.check import check_neighbor
if check_neighbor(self.neighbors):
sys.exit(0)
sys.exit(1)
return True
def __init__ (self, neighbor, reactor): try: self.logger = Logger() # We only to try to connect via TCP once self.once = environment.settings().tcp.once self.bind = True if environment.settings().tcp.bind else False except RuntimeError: self.logger = FakeLogger() self.once = False self.bind = True self.reactor = reactor self.neighbor = neighbor # The next restart neighbor definition self._neighbor = None # The peer should restart after a stop self._restart = True # The peer was restarted (to know what kind of open to send for graceful restart) self._restarted = FORCE_GRACEFUL # We want to remove routes which are not in the configuration anymote afte a signal to reload self._reconfigure = True # We want to send all the known routes self._resend_routes = SEND.DONE # We have new routes for the peers self._have_routes = True # We have been asked to teardown the session with this code self._teardown = None self._delay = Delay() self.recv_timer = None self._incoming = Direction ( 'in', self._accept, FSM(FSM.IDLE), None, False, False ) self._outgoing = Direction ( 'out', self._connect, FSM(FSM.IDLE), None, None if not self.neighbor.passive else False, None if not self.neighbor.passive else False ) self._incoming.opposite = self._outgoing self._outgoing.opposite = self._incoming
def __init__ (self, reactor):
self.pid = environment.settings().daemon.pid
self.user = environment.settings().daemon.user
self.daemonize = environment.settings().daemon.daemonize
self.umask = environment.settings().daemon.umask
self.logger = Logger()
self.reactor = reactor
os.chdir('/')
os.umask(self.umask)
def __init__(self, peer):
try:
self.logger = Logger()
except RuntimeError:
self.logger = FakeLogger()
self.peer = peer
self.neighbor = peer.neighbor
self.negotiated = Negotiated(self.neighbor)
self.connection = None
if self.neighbor.connect:
self.port = self.neighbor.connect
elif os.environ.get('exabgp.tcp.port', '').isdigit():
self.port = int(os.environ.get('exabgp.tcp.port'))
elif os.environ.get('exabgp_tcp_port', '').isdigit():
self.port = int(os.environ.get('exabgp_tcp_port'))
else:
self.port = 179
# XXX: FIXME: check the the -19 is correct (but it is harmless)
# The message size is the whole BGP message _without_ headers
self.message_size = Message.MAX_LEN - Message.HEADER_LEN
from exabgp.configuration.environment import environment
self.log_routes = environment.settings().log.routes
def __init__ (self):
if self._instance.get('class',None) is not None:
return
self._instance['class'] = self
command = environment.settings()
self.short = command.log.short
self.level = command.log.level
self._option = {
'pdb': command.debug.pdb,
'reactor': command.log.enable and (command.log.all or command.log.reactor),
'daemon': command.log.enable and (command.log.all or command.log.daemon),
'processes': command.log.enable and (command.log.all or command.log.processes),
'configuration': command.log.enable and (command.log.all or command.log.configuration),
'network': command.log.enable and (command.log.all or command.log.network),
'wire': command.log.enable and (command.log.all or command.log.packets),
'message': command.log.enable and (command.log.all or command.log.message),
'rib': command.log.enable and (command.log.all or command.log.rib),
'timer': command.log.enable and (command.log.all or command.log.timers),
'routes': command.log.enable and (command.log.all or command.log.routes),
'parser': command.log.enable and (command.log.all or command.log.parser),
}
if not command.log.enable:
self.destination = ''
return
self.destination = command.log.destination
self.restart(True)
def callback ():
families = None
lines_per_yield = environment.settings().api.chunk
if last in ('routes', 'extensive', 'static', 'flow', 'l2vpn'):
peers = list(reactor.peers)
else:
peers = [n for n in reactor.peers.keys() if 'neighbor %s' % last in n]
for key in peers:
peer = reactor.peers.get(key, None)
if not peer:
continue
if advertised:
families = peer.proto.negotiated.families if peer.proto else []
rib = peer.neighbor.rib.outgoing if rib_name == 'out' else peer.neighbor.rib.incoming
routes = list(rib.cached_changes(families))
while routes:
changes, routes = routes[:lines_per_yield], routes[lines_per_yield:]
for change in changes:
if isinstance(change.nlri, route_type):
if extensive:
reactor.processes.answer(service,'neighbor %s %s %s' % (peer.neighbor.name(),'%s %s' % change.nlri.family(),change.extensive()),force=True)
else:
reactor.processes.answer(service,'neighbor %s %s %s' % (peer.neighbor.peer_address,'%s %s' % change.nlri.family(),str(change.nlri)),force=True)
yield True
reactor.processes.answer_done(service)
def daemonise(self):
if not self.daemonize:
return
log = environment.settings().log
if log.enable and log.destination.lower() in ('stdout', 'stderr'):
self.logger.daemon(
'ExaBGP can not fork when logs are going to %s' %
log.destination.lower(), 'critical')
return
def fork_exit():
try:
pid = os.fork()
if pid > 0:
os._exit(0)
except OSError as exc:
self.logger.reactor(
'Can not fork, errno %d : %s' % (exc.errno, exc.strerror),
'critical')
# do not detach if we are already supervised or run by init like process
if self._is_socket(sys.__stdin__.fileno()) or os.getppid() == 1:
return
fork_exit()
os.setsid()
fork_exit()
self.silence()
def debug_self_check(self):
# we are not really running the program, just want check the configuration validity
if environment.settings().debug.selfcheck:
from exabgp.configuration.check import check_neighbor
if check_neighbor(self.neighbors):
sys.exit(0)
sys.exit(1)
def __init__ (self):
if self._instance.get('class',None) is not None:
return
self._instance['class'] = self
command = environment.settings()
self.short = command.log.short
self.level = command.log.level
self._option = HashTable()
self._option.pdb = command.debug.pdb
self._option.reactor = command.log.enable and (command.log.all or command.log.reactor)
self._option.daemon = command.log.enable and (command.log.all or command.log.daemon)
self._option.processes = command.log.enable and (command.log.all or command.log.processes)
self._option.configuration = command.log.enable and (command.log.all or command.log.configuration)
self._option.network = command.log.enable and (command.log.all or command.log.network)
self._option.wire = command.log.enable and (command.log.all or command.log.packets)
self._option.message = command.log.enable and (command.log.all or command.log.message)
self._option.rib = command.log.enable and (command.log.all or command.log.rib)
self._option.timer = command.log.enable and (command.log.all or command.log.timers)
self._option.routes = command.log.enable and (command.log.all or command.log.routes)
self._option.parser = command.log.enable and (command.log.all or command.log.parser)
if not command.log.enable:
self.destination = ''
return
self.destination = command.log.destination
self.restart(True)
def __init__ (self): command = environment.settings() self.short = command.log.short self.level = command.log.level self._pdb = command.debug.pdb self._reactor = command.log.enable and (command.log.all or command.log.reactor) self._daemon = command.log.enable and (command.log.all or command.log.daemon) self._processes = command.log.enable and (command.log.all or command.log.processes) self._configuration = command.log.enable and (command.log.all or command.log.configuration) self._network = command.log.enable and (command.log.all or command.log.network) self._wire = command.log.enable and (command.log.all or command.log.packets) self._message = command.log.enable and (command.log.all or command.log.message) self._rib = command.log.enable and (command.log.all or command.log.rib) self._timer = command.log.enable and (command.log.all or command.log.timers) self._routes = command.log.enable and (command.log.all or command.log.routes) self._parser = command.log.enable and (command.log.all or command.log.parser) if not command.log.enable: return self.destination = command.log.destination self.restart(True)
def __init__(self):
command = environment.settings()
self.short = command.log.short
self.level = command.log.level
self._pdb = command.debug.pdb
self._reactor = command.log.enable and (command.log.all
or command.log.reactor)
self._daemon = command.log.enable and (command.log.all
or command.log.daemon)
self._processes = command.log.enable and (command.log.all
or command.log.processes)
self._configuration = command.log.enable and (
command.log.all or command.log.configuration)
self._network = command.log.enable and (command.log.all
or command.log.network)
self._wire = command.log.enable and (command.log.all
or command.log.packets)
self._message = command.log.enable and (command.log.all
or command.log.message)
self._rib = command.log.enable and (command.log.all or command.log.rib)
self._timer = command.log.enable and (command.log.all
or command.log.timers)
self._routes = command.log.enable and (command.log.all
or command.log.routes)
self._parser = command.log.enable and (command.log.all
or command.log.parser)
if not command.log.enable:
return
self.destination = command.log.destination
self.restart(True)
def __init__(self, location=None, production=True):
from exabgp.configuration.environment import environment
self.location = location or environment.settings().api.socket
self.unix = None
self.sock = None
self._production = production
def __init__ (self):
if self._instance.get('class',None) is not None:
return
self._instance['class'] = self
command = environment.settings()
self.short = command.log.short
self.level = command.log.level
self._option = HashTable()
self._option.pdb = command.debug.pdb
self._option.reactor = command.log.enable and (command.log.all or command.log.reactor)
self._option.daemon = command.log.enable and (command.log.all or command.log.daemon)
self._option.processes = command.log.enable and (command.log.all or command.log.processes)
self._option.configuration = command.log.enable and (command.log.all or command.log.configuration)
self._option.network = command.log.enable and (command.log.all or command.log.network)
self._option.wire = command.log.enable and (command.log.all or command.log.packets)
self._option.message = command.log.enable and (command.log.all or command.log.message)
self._option.rib = command.log.enable and (command.log.all or command.log.rib)
self._option.timer = command.log.enable and (command.log.all or command.log.timers)
self._option.routes = command.log.enable and (command.log.all or command.log.routes)
self._option.parser = command.log.enable and (command.log.all or command.log.parser)
if not command.log.enable:
return
self.destination = command.log.destination
self.restart(True)
def callback ():
families = None
lines_per_yield = environment.settings().api.chunk
if last in ('routes', 'extensive', 'static', 'flow', 'l2vpn'):
peers = list(reactor.peers)
else:
peers = [n for n in reactor.peers.keys() if 'neighbor %s' % last in n]
for key in peers:
peer = reactor.peers.get(key, None)
if not peer:
continue
if advertised:
families = peer.proto.negotiated.families if peer.proto else []
rib = peer.neighbor.rib.outgoing if rib_name == 'out' else peer.neighbor.rib.incoming
routes = list(rib.cached_changes(families))
while routes:
changes, routes = routes[:lines_per_yield], routes[lines_per_yield:]
for change in changes:
if isinstance(change.nlri, route_type):
if extensive:
reactor.processes.answer(service,'%s %s %s' % (peer.neighbor.name(),'%s %s' % change.nlri.family(),change.extensive()),force=True)
else:
reactor.processes.answer(service,'neighbor %s %s %s' % (peer.neighbor.peer_address,'%s %s' % change.nlri.family(),str(change.nlri)),force=True)
yield True
reactor.processes.answer_done(service)
def __init__ (self):
if self._instance.get('class',None) is not None:
return
self._instance['class'] = self
command = environment.settings()
self.short = command.log.short
self.level = command.log.level
self._option = {
'pdb': command.debug.pdb,
'reactor': command.log.enable and (command.log.all or command.log.reactor),
'daemon': command.log.enable and (command.log.all or command.log.daemon),
'processes': command.log.enable and (command.log.all or command.log.processes),
'configuration': command.log.enable and (command.log.all or command.log.configuration),
'network': command.log.enable and (command.log.all or command.log.network),
'wire': command.log.enable and (command.log.all or command.log.packets),
'message': command.log.enable and (command.log.all or command.log.message),
'rib': command.log.enable and (command.log.all or command.log.rib),
'timer': command.log.enable and (command.log.all or command.log.timers),
'routes': command.log.enable and (command.log.all or command.log.routes),
'parser': command.log.enable and (command.log.all or command.log.parser),
}
if not command.log.enable:
self.destination = ''
return
self.destination = command.log.destination
self.restart(True)
def __init__ (self, peer):
try:
self.logger = Logger()
except RuntimeError:
self.logger = FakeLogger()
self.peer = peer
self.neighbor = peer.neighbor
self.negotiated = Negotiated(self.neighbor)
self.connection = None
if self.neighbor.connect:
self.port = self.neighbor.connect
elif os.environ.get('exabgp.tcp.port','').isdigit():
self.port = int(os.environ.get('exabgp.tcp.port'))
elif os.environ.get('exabgp_tcp_port','').isdigit():
self.port = int(os.environ.get('exabgp_tcp_port'))
else:
self.port = 179
# XXX: FIXME: check the the -19 is correct (but it is harmless)
# The message size is the whole BGP message _without_ headers
self.message_size = Message.MAX_LEN-Message.HEADER_LEN
from exabgp.configuration.environment import environment
self.log_routes = environment.settings().log.routes
def debug_self_check (self): # we are not really running the program, just want check the configuration validity if environment.settings().debug.selfcheck: from exabgp.configuration.check import check_neighbor if check_neighbor(self.neighbors): sys.exit(0) sys.exit(1)
def __init__ (self, location=None,production=True): from exabgp.configuration.environment import environment self.location = location or environment.settings().api.socket self.unix = None self.sock = None self._production = production
def daemonise (self):
if not self.daemonize:
return
log = environment.settings().log
if log.enable and log.destination.lower() in ('stdout','stderr'):
self.logger.daemon('ExaBGP can not fork when logs are going to %s' % log.destination.lower(),'critical')
return
def fork_exit ():
try:
pid = os.fork()
if pid > 0:
os._exit(0)
except OSError as exc:
self.logger.reactor('Can not fork, errno %d : %s' % (exc.errno,exc.strerror),'critical')
# do not detach if we are already supervised or run by init like process
if self._is_socket(sys.__stdin__.fileno()) or os.getppid() == 1:
return
fork_exit()
os.setsid()
fork_exit()
self.silence()
def __init__ (self,reactor): self.logger = Logger() self.reactor = reactor self.clean() self.silence = False from exabgp.configuration.environment import environment self.highres = environment.settings().api.highres
def __init__ (self, reactor): self.logger = Logger() self.reactor = reactor self.clean() self.silence = False from exabgp.configuration.environment import environment self.highres = environment.settings().api.highres
def _accept (self):
self._incoming.fsm.change(FSM.CONNECT)
# we can do this as Protocol is a mutable object
proto = self._incoming.proto
# send OPEN
message = Message.CODE.NOP
for message in proto.new_open(self._restarted):
if ord(message.TYPE) == Message.CODE.NOP:
yield ACTION.NOW
proto.negotiated.sent(message)
self._incoming.fsm.change(FSM.OPENSENT)
# Read OPEN
wait = environment.settings().bgp.openwait
opentimer = ReceiveTimer(self.me,wait,1,1,'waited for open too long, we do not like stuck in active')
# Only yield if we have not the open, otherwise the reactor can run the other connection
# which would be bad as we need to do the collission check without going to the other peer
for message in proto.read_open(self.neighbor.peer_address.top()):
opentimer.check_ka(message)
if ord(message.TYPE) == Message.CODE.NOP:
yield ACTION.LATER
self._incoming.fsm.change(FSM.OPENCONFIRM)
proto.negotiated.received(message)
proto.validate_open()
if self._outgoing.fsm == FSM.OPENCONFIRM:
self.logger.network('incoming connection finds the outgoing connection is in openconfirm')
local_id = self.neighbor.router_id.pack()
remote_id = proto.negotiated.received_open.router_id.pack()
if local_id < remote_id:
self.logger.network('closing the outgoing connection')
self._stop(self._outgoing,'collision local id < remote id')
yield ACTION.LATER
else:
self.logger.network('aborting the incoming connection')
raise Interrupted(self._incoming)
# Send KEEPALIVE
for message in self._incoming.proto.new_keepalive('OPENCONFIRM'):
yield ACTION.NOW
# Start keeping keepalive timer
self.recv_timer = ReceiveTimer(self.me,proto.negotiated.holdtime,4,0)
# Read KEEPALIVE
for message in proto.read_keepalive():
self.recv_timer.check_ka(message)
yield ACTION.NOW
self._incoming.fsm.change(FSM.ESTABLISHED)
# let the caller know that we were sucesfull
yield ACTION.NOW
def _accept (self):
self._incoming.fsm.change(FSM.CONNECT)
# we can do this as Protocol is a mutable object
proto = self._incoming.proto
# send OPEN
message = Message.CODE.NOP
for message in proto.new_open(self._restarted):
if ord(message.TYPE) == Message.CODE.NOP:
yield ACTION.NOW
proto.negotiated.sent(message)
self._incoming.fsm.change(FSM.OPENSENT)
# Read OPEN
wait = environment.settings().bgp.openwait
opentimer = ReceiveTimer(self.me,wait,1,1,'waited for open too long, we do not like stuck in active')
# Only yield if we have not the open, otherwise the reactor can run the other connection
# which would be bad as we need to do the collission check without going to the other peer
for message in proto.read_open(self.neighbor.peer_address.top()):
opentimer.check_ka(message)
if ord(message.TYPE) == Message.CODE.NOP:
yield ACTION.LATER
self._incoming.fsm.change(FSM.OPENCONFIRM)
proto.negotiated.received(message)
proto.validate_open()
if self._outgoing.fsm == FSM.OPENCONFIRM:
self.logger.network('incoming connection finds the outgoing connection is in openconfirm')
local_id = self.neighbor.router_id.pack()
remote_id = proto.negotiated.received_open.router_id.pack()
if local_id < remote_id:
self.logger.network('closing the outgoing connection')
self._stop(self._outgoing,'collision local id < remote id')
yield ACTION.LATER
else:
self.logger.network('aborting the incoming connection')
raise Interrupted(self._incoming)
# Send KEEPALIVE
for message in self._incoming.proto.new_keepalive('OPENCONFIRM'):
yield ACTION.NOW
# Start keeping keepalive timer
self.recv_timer = ReceiveTimer(self.me,proto.negotiated.holdtime,4,0)
# Read KEEPALIVE
for message in proto.read_keepalive():
self.recv_timer.check_ka(message)
yield ACTION.NOW
self._incoming.fsm.change(FSM.ESTABLISHED)
# let the caller know that we were sucesfull
yield ACTION.NOW
def __init__(self, error, logger):
self.error = error
self.logger = logger
self.capability = ParseCapability(error)
self.fifo = environment.settings().api.file
self.neighbors = {}
self._neighbors = {}
self._previous = {}
def __init__ (self, error, logger):
self.error = error
self.logger = logger
self.capability = ParseCapability(error)
self.fifo = environment.settings().api.file
self.neighbors = {}
self._neighbors = {}
self._previous = {}
def reload(self):
try:
return self._reload()
except KeyboardInterrupt:
return self.error.set(
'configuration reload aborted by ^C or SIGINT')
except Error as exc:
if environment.settings().debug.configuration:
raise
return self.error.set(
'problem parsing configuration file line %d\n'
'error message: %s' % (self.tokeniser.index_line, exc))
except StandardError as exc:
if environment.settings().debug.configuration:
raise
return self.error.set(
'problem parsing configuration file line %d\n'
'error message: %s' % (self.tokeniser.index_line, exc))
def __init__(self, neighbor, reactor):
try:
self.logger = Logger()
# We only to try to connect via TCP once
self.once = environment.settings().tcp.once
self.bind = True if environment.settings().tcp.bind else False
except RuntimeError:
self.logger = FakeLogger()
self.once = False
self.bind = True
self.reactor = reactor
self.neighbor = neighbor
# The next restart neighbor definition
self._neighbor = None
# The peer should restart after a stop
self._restart = True
# The peer was restarted (to know what kind of open to send for graceful restart)
self._restarted = FORCE_GRACEFUL
# We want to remove routes which are not in the configuration anymote afte a signal to reload
self._reconfigure = True
# We want to send all the known routes
self._resend_routes = SEND.DONE
# We have new routes for the peers
self._have_routes = True
# We have been asked to teardown the session with this code
self._teardown = None
self._delay = Delay()
self.recv_timer = None
self._incoming = Direction('in', self._accept, FSM(FSM.IDLE), None,
False, False)
self._outgoing = Direction(
'out', self._connect, FSM(FSM.IDLE), None,
None if not self.neighbor.passive else False,
None if not self.neighbor.passive else False)
self._incoming.opposite = self._outgoing
self._outgoing.opposite = self._incoming
def __init__ (self, neighbor, reactor):
try:
self.logger = Logger()
# We only to try to connect via TCP once
self.once = environment.settings().tcp.once
self.bind = True if environment.settings().tcp.bind else False
except RuntimeError:
self.logger = FakeLogger()
self.once = False
self.bind = True
now = time.time()
self.reactor = reactor
self.neighbor = neighbor
# The next restart neighbor definition
self._neighbor = None
self.proto = None
self.fsm = FSM(self,FSM.IDLE)
self.stats = {
'fsm': self.fsm,
'creation': now,
'complete': now,
}
self.generator = None
# The peer should restart after a stop
self._restart = True
# The peer was restarted (to know what kind of open to send for graceful restart)
self._restarted = FORCE_GRACEFUL
# We want to remove routes which are not in the configuration anymote afte a signal to reload
self._reconfigure = True
# We want to send all the known routes
self._resend_routes = SEND.DONE
# We have new routes for the peers
self._have_routes = True
# We have been asked to teardown the session with this code
self._teardown = None
self._delay = Delay()
self.recv_timer = None
def _accept (self):
# we can do this as Protocol is a mutable object
proto = self._['in']['proto']
# send OPEN
for message in proto.new_open(self._restarted):
if ord(message.TYPE) == Message.Type.NOP:
yield ACTION.immediate
proto.negotiated.sent(message)
self._['in']['state'] = STATE.opensent
# Read OPEN
wait = environment.settings().bgp.openwait
opentimer = Timer(self._log('in'),wait,1,1,'waited for open too long, we do not like stuck in active')
# Only yield if we have not the open, otherwise the reactor can run the other connection
# which would be bad as we need to do the collission check without going to the other peer
for message in proto.read_open(self.neighbor.peer_address.ip):
opentimer.tick(message)
if ord(message.TYPE) == Message.Type.NOP:
yield ACTION.later
self._['in']['state'] = STATE.openconfirm
proto.negotiated.received(message)
proto.validate_open()
if self._['out']['state'] == STATE.openconfirm:
self.logger.network('incoming connection finds the outgoing connection is in openconfirm')
local_id = self.neighbor.router_id.packed
remote_id = proto.negotiated.received_open.router_id.packed
if local_id < remote_id:
self.logger.network('closing the outgoing connection')
self._stop('out','collision local id < remote id')
yield ACTION.later
else:
self.logger.network('aborting the incoming connection')
stop = Interrupted()
stop.direction = 'in'
raise stop
# Send KEEPALIVE
for message in self._['in']['proto'].new_keepalive('OPENCONFIRM'):
yield ACTION.immediate
# Start keeping keepalive timer
self.timer = Timer(self._log('in'),proto.negotiated.holdtime,4,0)
# Read KEEPALIVE
for message in proto.read_keepalive('ESTABLISHED'):
self.timer.tick(message)
yield ACTION.later
self._['in']['state'] = STATE.established
# let the caller know that we were sucesfull
yield ACTION.immediate
def _accept (self):
# we can do this as Protocol is a mutable object
proto = self._['in']['proto']
# send OPEN
for message in proto.new_open(self._restarted):
if ord(message.TYPE) == Message.ID.NOP:
yield ACTION.immediate
proto.negotiated.sent(message)
self._['in']['state'] = STATE.opensent
# Read OPEN
wait = environment.settings().bgp.openwait
opentimer = ReceiveTimer(self.me,wait,1,1,'waited for open too long, we do not like stuck in active')
# Only yield if we have not the open, otherwise the reactor can run the other connection
# which would be bad as we need to do the collission check without going to the other peer
for message in proto.read_open(self.neighbor.peer_address.ip):
opentimer.check_ka(message)
if ord(message.TYPE) == Message.ID.NOP:
yield ACTION.later
self._['in']['state'] = STATE.openconfirm
proto.negotiated.received(message)
proto.validate_open()
if self._['out']['state'] == STATE.openconfirm:
self.logger.network('incoming connection finds the outgoing connection is in openconfirm')
local_id = self.neighbor.router_id.packed
remote_id = proto.negotiated.received_open.router_id.packed
if local_id < remote_id:
self.logger.network('closing the outgoing connection')
self._stop('out','collision local id < remote id')
yield ACTION.later
else:
self.logger.network('aborting the incoming connection')
stop = Interrupted()
stop.direction = 'in'
raise stop
# Send KEEPALIVE
for message in self._['in']['proto'].new_keepalive('OPENCONFIRM'):
yield ACTION.immediate
# Start keeping keepalive timer
self.recv_timer = ReceiveTimer(self.me,proto.negotiated.holdtime,4,0)
# Read KEEPALIVE
for message in proto.read_keepalive():
self.recv_timer.check_ka(message)
yield ACTION.immediate
self._['in']['state'] = STATE.established
# let the caller know that we were sucesfull
yield ACTION.immediate
def __init__(self):
# cached representation of the object
self._str = ''
self._idx = ''
self._json = ''
# The parsed attributes have no mp routes and/or those are last
self.cacheable = True
# XXX: FIXME: surely not the best place for this
Attribute.caching = environment.settings().cache.attributes
def __init__ (self, neighbor, reactor):
try:
self.logger = Logger()
# We only to try to connect via TCP once
self.once = environment.settings().tcp.once
self.bind = True if environment.settings().tcp.bind else False
except RuntimeError:
self.logger = FakeLogger()
self.once = False
self.bind = True
now = time.time()
self.reactor = reactor
self.neighbor = neighbor
# The next restart neighbor definition
self._neighbor = None
self.proto = None
self.fsm = FSM(self,FSM.IDLE)
self.stats = {
'fsm': self.fsm,
'creation': now,
'reset': now,
'complete': 0,
}
self.generator = None
# The peer should restart after a stop
self._restart = True
# The peer was restarted (to know what kind of open to send for graceful restart)
self._restarted = FORCE_GRACEFUL
# We want to remove routes which are not in the configuration anymore after a signal to reload
self._reconfigure = True
# We want to send all the known routes
self._resend_routes = SEND.DONE
# We have been asked to teardown the session with this code
self._teardown = None
self._delay = Delay()
self.recv_timer = None
def reload (self):
try:
return self._reload()
except KeyboardInterrupt:
return self.error.set('configuration reload aborted by ^C or SIGINT')
except Error as exc:
if environment.settings().debug.configuration:
raise
return self.error.set(
'problem parsing configuration file line %d\n'
'error message: %s' % (self.tokeniser.index_line, exc)
)
except StandardError as exc:
if environment.settings().debug.configuration:
raise
return self.error.set(
'problem parsing configuration file line %d\n'
'error message: %s' % (self.tokeniser.index_line, exc)
)
def __init__ (self): # cached representation of the object self._str = '' self._idx = '' self._json = '' # The parsed attributes have no mp routes and/or those are last self.cacheable = True # XXX: FIXME: surely not the best place for this Attribute.caching = environment.settings().cache.attributes
def __init__ (self, configurations):
self.ip = environment.settings().tcp.bind
self.port = environment.settings().tcp.port
self.respawn = environment.settings().api.respawn
self.max_loop_time = environment.settings().reactor.speed
self.early_drop = environment.settings().daemon.drop
self.logger = Logger()
self.daemon = Daemon(self)
self.processes = None
self.listener = None
self.configuration = Configuration(configurations)
self.api = API(self)
self.peers = {}
self.route_update = False
self._stopping = environment.settings().tcp.once
self._shutdown = False
self._reload = False
self._reload_processes = False
self._restart = False
self._saved_pid = False
self._pending = deque()
self._running = None
signal.signal(signal.SIGTERM, self.sigterm)
signal.signal(signal.SIGHUP, self.sighup)
signal.signal(signal.SIGALRM, self.sigalrm)
signal.signal(signal.SIGUSR1, self.sigusr1)
signal.signal(signal.SIGUSR2, self.sigusr2)
def __init__(self, configurations):
self.ip = environment.settings().tcp.bind
self.port = environment.settings().tcp.port
self.respawn = environment.settings().api.respawn
self.max_loop_time = environment.settings().reactor.speed
self.early_drop = environment.settings().daemon.drop
self.logger = Logger()
self.daemon = Daemon(self)
self.processes = None
self.listener = None
self.configuration = Configuration(configurations)
self.api = API(self)
self.peers = {}
self.route_update = False
self._stopping = environment.settings().tcp.once
self._shutdown = False
self._reload = False
self._reload_processes = False
self._restart = False
self._saved_pid = False
self._pending = deque()
self._running = None
signal.signal(signal.SIGTERM, self.sigterm)
signal.signal(signal.SIGHUP, self.sighup)
signal.signal(signal.SIGALRM, self.sigalrm)
signal.signal(signal.SIGUSR1, self.sigusr1)
signal.signal(signal.SIGUSR2, self.sigusr2)
def __init__(self):
# cached representation of the object
self._str = ""
self._idx = ""
self._json = ""
# We should cache the attributes parsed
self.cache_attributes = environment.settings().cache.attributes
# some of the attributes are MP_REACH_NLRI or MP_UNREACH_NLRI
self.hasmp = 0
# The parsed attributes have no mp routes and/or those are last
self.cacheable = True
# for the last route, the part of the attributes which are not routes we can use for fast caching
self.prefix = ""
def __init__(self, configurations):
self._ips = environment.settings().tcp.bind
self._port = environment.settings().tcp.port
self._stopping = environment.settings().tcp.once
self.max_loop_time = environment.settings().reactor.speed
self.early_drop = environment.settings().daemon.drop
self.processes = None
self.configuration = Configuration(configurations)
self.logger = Logger()
self. async = ASYNC()
self.signal = Signal()
self.daemon = Daemon(self)
self.listener = Listener(self)
self.api = API(self)
self.peers = {}
self._reload_processes = False
self._saved_pid = False
def _read_open (self): wait = environment.settings().bgp.openwait opentimer = ReceiveTimer(self.proto.connection.session,wait,1,1,'waited for open too long, we do not like stuck in active') # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check without going to the other peer for message in self.proto.read_open(self.neighbor.peer_address.top()): opentimer.check_ka(message) # XXX: FIXME: change the whole code to use the ord and not the chr version # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check if ordinal(message.TYPE) == Message.CODE.NOP: yield ACTION.NOW yield message
def _read_open (self): wait = environment.settings().bgp.openwait opentimer = ReceiveTimer(self.proto.connection.session,wait,1,1,'waited for open too long, we do not like stuck in active') # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check without going to the other peer for message in self.proto.read_open(self.neighbor.peer_address.top()): opentimer.check_ka(message) # XXX: FIXME: change the whole code to use the ord and not the chr version # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check if ordinal(message.TYPE) == Message.CODE.NOP: yield ACTION.NOW yield message
def __init__(self):
# cached representation of the object
self._str = ''
self._idx = ''
self._json = ''
# We should cache the attributes parsed
self.cache_attributes = environment.settings().cache.attributes
# some of the attributes are MP_REACH_NLRI or MP_UNREACH_NLRI
self.hasmp = 0
# The parsed attributes have no mp routes and/or those are last
self.cacheable = True
# for the last route, the part of the attributes which are not routes we can use for fast caching
self.prefix = ''
def __init__ (self):
command = environment.settings()
self.short = command.log.short
self.level = command.log.level
self._pdb = command.debug.pdb
self._reactor = command.log.enable and (command.log.all or command.log.reactor)
self._daemon = command.log.enable and (command.log.all or command.log.daemon)
self._processes = command.log.enable and (command.log.all or command.log.processes)
self._configuration = command.log.enable and (command.log.all or command.log.configuration)
self._network = command.log.enable and (command.log.all or command.log.network)
self._wire = command.log.enable and (command.log.all or command.log.packets)
self._message = command.log.enable and (command.log.all or command.log.message)
self._rib = command.log.enable and (command.log.all or command.log.rib)
self._timer = command.log.enable and (command.log.all or command.log.timers)
self._routes = command.log.enable and (command.log.all or command.log.routes)
self._parser = command.log.enable and (command.log.all or command.log.parser)
if not command.log.enable:
return
destination = command.log.destination
try:
if destination in ('','syslog'):
if sys.platform == "darwin":
address = '/var/run/syslog'
else:
address = '/dev/log'
if not os.path.exists(address):
address = ('localhost', 514)
handler = logging.handlers.SysLogHandler(address)
elif destination.lower().startswith('host:'):
# If the address is invalid, each syslog call will print an error.
# See how it can be avoided, as the socket error is encapsulated and not returned
address = (destination[5:].strip(), 514)
handler = logging.handlers.SysLogHandler(address)
else:
if destination.lower() == 'stdout':
handler = logging.StreamHandler(sys.stdout)
elif destination.lower() == 'stderr':
handler = logging.StreamHandler(sys.stderr)
else:
handler = logging.handlers.RotatingFileHandler(destination, maxBytes=5*1024*1024, backupCount=5)
self._syslog = logging.getLogger()
self._syslog.setLevel(logging.DEBUG)
self._syslog.addHandler(handler)
except IOError:
self.critical('Can not use SYSLOG, failing back to stdout')
def __init__(self):
command = environment.settings()
self.short = command.log.short
self.level = command.log.level
self._pdb = command.debug.pdb
self._reactor = command.log.enable and (command.log.all or command.log.reactor)
self._daemon = command.log.enable and (command.log.all or command.log.daemon)
self._processes = command.log.enable and (command.log.all or command.log.processes)
self._configuration = command.log.enable and (command.log.all or command.log.configuration)
self._network = command.log.enable and (command.log.all or command.log.network)
self._wire = command.log.enable and (command.log.all or command.log.packets)
self._message = command.log.enable and (command.log.all or command.log.message)
self._rib = command.log.enable and (command.log.all or command.log.rib)
self._timer = command.log.enable and (command.log.all or command.log.timers)
self._routes = command.log.enable and (command.log.all or command.log.routes)
self._parser = command.log.enable and (command.log.all or command.log.parser)
if not command.log.enable:
return
destination = command.log.destination
try:
if destination in ("", "syslog"):
if sys.platform == "darwin":
address = "/var/run/syslog"
else:
address = "/dev/log"
if not os.path.exists(address):
address = ("localhost", 514)
handler = logging.handlers.SysLogHandler(address)
elif destination.lower().startswith("host:"):
# If the address is invalid, each syslog call will print an error.
# See how it can be avoided, as the socket error is encapsulated and not returned
address = (destination[5:].strip(), 514)
handler = logging.handlers.SysLogHandler(address)
else:
if destination.lower() == "stdout":
handler = logging.StreamHandler(sys.stdout)
elif destination.lower() == "stderr":
handler = logging.StreamHandler(sys.stderr)
else:
handler = logging.handlers.RotatingFileHandler(destination, maxBytes=5 * 1024 * 1024, backupCount=5)
self._syslog = logging.getLogger()
self._syslog.setLevel(logging.DEBUG)
self._syslog.addHandler(handler)
except IOError:
self.critical("Can not use SYSLOG, failing back to stdout")
def _read_open (self): wait = environment.settings().bgp.openwait opentimer = ReceiveTimer(self.proto.connection.session,wait,1,1,'waited for open too long, we do not like stuck in active') # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check without going to the other peer for message in self.proto.read_open(self.neighbor.peer_address.top()): opentimer.check_ka(message) # XXX: FIXME: change the whole code to use the ord and not the chr version # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check if ordinal(message.TYPE) == Message.CODE.NOP: # If a peer does not reply to OPEN message, or not enough bytes # yielding ACTION.NOW can cause ExaBGP to busy spin trying to # read from peer. See GH #723 . yield ACTION.LATER yield message
def daemonise (self):
if not self.daemonize:
return
log = environment.settings().log
if log.enable and log.destination.lower() in ('stdout','stderr'):
self.logger.daemon('ExaBGP can not fork when logs are going to %s' % log.destination.lower(),'critical')
return
def fork_exit ():
try:
pid = os.fork()
if pid > 0:
os._exit(0)
except OSError, e:
self.logger.reactor('Can not fork, errno %d : %s' % (e.errno,e.strerror),'critical')
def _read_open (self): wait = environment.settings().bgp.openwait opentimer = ReceiveTimer(self.proto.connection.session,wait,1,1,'waited for open too long, we do not like stuck in active') # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check without going to the other peer for message in self.proto.read_open(self.neighbor.peer_address.top()): opentimer.check_ka(message) # XXX: FIXME: change the whole code to use the ord and not the chr version # Only yield if we have not the open, otherwise the reactor can run the other connection # which would be bad as we need to do the collission check if ordinal(message.TYPE) == Message.CODE.NOP: # If a peer does not reply to OPEN message, or not enough bytes # yielding ACTION.NOW can cause ExaBGP to busy spin trying to # read from peer. See GH #723 . yield ACTION.LATER yield message
def __init__ (self, afi, peer, local): # peer and local are strings of the IP try: self.defensive = environment.settings().debug.defensive self.logger = Logger() except RuntimeError: self.defensive = True self.logger = FakeLogger() self.afi = afi self.peer = peer self.local = local self.io = None self.established = False self.id = self.identifier.get(self.direction,1)
def callback ():
lines_per_yield = environment.settings().api.chunk
if last in ('routes', 'extensive', 'static', 'flow', 'l2vpn'):
peers = reactor.peers()
else:
peers = [n for n in reactor.peers() if 'neighbor %s' % last in n]
for key in peers:
routes = reactor.neighor_rib(key, rib_name, advertised)
while routes:
changes, routes = routes[:lines_per_yield], routes[lines_per_yield:]
for change in changes:
if isinstance(change.nlri, route_type):
if extensive:
reactor.processes.write(service,'%s %s %s' % (reactor.neighbor_name(key),'%s %s' % change.nlri.family(),change.extensive()))
else:
reactor.processes.write(service,'neighbor %s %s %s' % (reactor.neighbor_ip(key),'%s %s' % change.nlri.family(),str(change.nlri)))
yield True
reactor.processes.answer_done(service)
def __init__ (self, peer):
try:
self.logger = Logger()
except RuntimeError:
self.logger = FakeLogger()
self.peer = peer
self.neighbor = peer.neighbor
self.negotiated = Negotiated(self.neighbor)
self.connection = None
if self.neighbor.connect:
self.port = self.neighbor.connect
elif os.environ.get('exabgp.tcp.port','').isdigit():
self.port = int(os.environ.get('exabgp.tcp.port'))
elif os.environ.get('exabgp_tcp_port','').isdigit():
self.port = int(os.environ.get('exabgp_tcp_port'))
else:
self.port = 179
from exabgp.configuration.environment import environment
self.log_routes = peer.neighbor.adj_rib_in or environment.settings().log.routes
def __init__(self, afi, peer, local):
self.msg_size = ExtendedMessage.INITIAL_SIZE
# peer and local are strings of the IP
try:
self.defensive = environment.settings().debug.defensive
self.logger = Logger()
except RuntimeError:
self.defensive = True
self.logger = FakeLogger()
self.afi = afi
self.peer = peer
self.local = local
self.io = None
self.established = False
self._rpoller = {}
self._wpoller = {}
self.id = self.identifier.get(self.direction, 1)
def _connect (self):
# try to establish the outgoing connection
proto = Protocol(self)
generator = proto.connect()
connected = False
try:
while not connected:
if self._teardown:
raise StopIteration()
connected = generator.next()
# we want to come back as soon as possible
yield ACTION.LATER
except StopIteration:
# Connection failed
if not connected:
proto.close('connection to peer failed',self._['in']['state'] != STATE.ESTABLISHED)
# A connection arrived before we could establish !
if not connected or self._['in']['proto']:
stop = Interrupted()
stop.direction = 'out'
yield ACTION.NOW
raise stop
self._['out']['state'] = STATE.CONNECT
self._['out']['proto'] = proto
# send OPEN
# Only yield if we have not the open, otherwise the reactor can run the other connection
# which would be bad as we need to set the state without going to the other peer
message = Message.CODE.NOP
for message in proto.new_open(self._restarted):
if ord(message.TYPE) == Message.CODE.NOP:
yield ACTION.NOW
proto.negotiated.sent(message)
self._['out']['state'] = STATE.OPENSENT
# Read OPEN
wait = environment.settings().bgp.openwait
opentimer = ReceiveTimer(self.me,wait,1,1,'waited for open too long, we do not like stuck in active')
for message in self._['out']['proto'].read_open(self.neighbor.peer_address.ip):
opentimer.check_ka(message)
# XXX: FIXME: change the whole code to use the ord and not the chr version
# Only yield if we have not the open, otherwise the reactor can run the other connection
# which would be bad as we need to do the collission check
if ord(message.TYPE) == Message.CODE.NOP:
yield ACTION.LATER
self._['out']['state'] = STATE.OPENCONFIRM
proto.negotiated.received(message)
proto.validate_open()
if self._['in']['state'] == STATE.OPENCONFIRM:
self.logger.network('outgoing connection finds the incoming connection is in openconfirm')
local_id = self.neighbor.router_id.packed
remote_id = proto.negotiated.received_open.router_id.packed
if local_id < remote_id:
self.logger.network('aborting the outgoing connection')
stop = Interrupted()
stop.direction = 'out'
raise stop
else:
self.logger.network('closing the incoming connection')
self._stop('in','collision local id < remote id')
yield ACTION.LATER
# Send KEEPALIVE
for message in proto.new_keepalive('OPENCONFIRM'):
yield ACTION.NOW
# Start keeping keepalive timer
self.recv_timer = ReceiveTimer(self.me,proto.negotiated.holdtime,4,0)
# Read KEEPALIVE
for message in self._['out']['proto'].read_keepalive():
self.recv_timer.check_ka(message)
yield ACTION.NOW
self._['out']['state'] = STATE.ESTABLISHED
# let the caller know that we were sucesfull
yield ACTION.NOW
def __init__(self, version):
self.version = version
self.time = nop
self.compact = environment.settings().api.compact
def run(self, validate, root):
self.daemon.daemonise()
# Make sure we create processes once we have closed file descriptor
# unfortunately, this must be done before reading the configuration file
# so we can not do it with dropped privileges
self.processes = Processes()
# we have to read the configuration possibly with root privileges
# as we need the MD5 information when we bind, and root is needed
# to bind to a port < 1024
# this is undesirable as :
# - handling user generated data as root should be avoided
# - we may not be able to reload the configuration once the privileges are dropped
# but I can not see any way to avoid it
for ip in self._ips:
if not self.listener.listen_on(ip, None, self._port, None, False,
None):
return self.Exit.listening
if not self.load():
return self.Exit.configuration
if validate: # only validate configuration
self.logger.warning('', 'configuration')
self.logger.warning('parsed Neighbors, un-templated',
'configuration')
self.logger.warning('------------------------------',
'configuration')
self.logger.warning('', 'configuration')
for key in self._peers:
self.logger.warning(str(self._peers[key].neighbor),
'configuration')
self.logger.warning('', 'configuration')
return self.Exit.validate
for neighbor in self.configuration.neighbors.values():
if neighbor.listen:
if not self.listener.listen_on(
neighbor.md5_ip, neighbor.peer_address,
neighbor.listen, neighbor.md5_password,
neighbor.md5_base64, neighbor.ttl_in):
return self.Exit.listening
if not self.early_drop:
self.processes.start(self.configuration.processes)
if not self.daemon.drop_privileges():
self.logger.critical(
'could not drop privileges to \'%s\' refusing to run as root' %
self.daemon.user, 'reactor')
self.logger.critical(
'set the environmemnt value exabgp.daemon.user to change the unprivileged user',
'reactor')
return self.Exit.privileges
if self.early_drop:
self.processes.start(self.configuration.processes)
# This is required to make sure we can write in the log location as we now have dropped root privileges
if not self.logger.restart():
self.logger.critical('could not setup the logger, aborting',
'reactor')
return self.Exit.log
if not self.daemon.savepid():
return self.Exit.pid
# did we complete the run of updates caused by the last SIGUSR1/SIGUSR2 ?
reload_completed = False
wait = environment.settings().tcp.delay
if wait:
sleeptime = (wait * 60) - int(time.time()) % (wait * 60)
self.logger.debug(
'waiting for %d seconds before connecting' % sleeptime,
'reactor')
time.sleep(float(sleeptime))
workers = {}
peers = set()
api_fds = []
ms_sleep = int(self._sleep_time * 1000)
while True:
try:
if self.signal.received:
for key in self._peers:
if self._peers[key].neighbor.api['signal']:
self._peers[key].reactor.processes.signal(
self._peers[key].neighbor, self.signal.number)
signaled = self.signal.received
self.signal.rearm()
if signaled == Signal.SHUTDOWN:
self.exit_code = self.Exit.normal
self.shutdown()
break
if signaled == Signal.RESTART:
self.restart()
continue
if not reload_completed:
continue
if signaled == Signal.FULL_RELOAD:
self._reload_processes = True
if signaled in (Signal.RELOAD, Signal.FULL_RELOAD):
self.load()
self.processes.start(self.configuration.processes,
self._reload_processes)
self._reload_processes = False
continue
if self.listener.incoming():
# check all incoming connection
self.asynchronous.schedule(
str(uuid.uuid1()), 'checking for new connection(s)',
self.listener.new_connections())
peers = self.active_peers()
if self._completed(peers):
reload_completed = True
sleep = ms_sleep
# do not attempt to listen on closed sockets even if the peer is still here
for io in list(workers.keys()):
if io == -1:
self._poller.unregister(io)
del workers[io]
# give a turn to all the peers
for key in list(peers):
peer = self._peers[key]
# limit the number of message handling per second
if self._rate_limited(key, peer.neighbor.rate_limit):
peers.discard(key)
continue
# handle the peer
action = peer.run()
# .run() returns an ACTION enum:
# * immediate if it wants to be called again
# * later if it should be called again but has no work atm
# * close if it is finished and is closing down, or restarting
if action == ACTION.CLOSE:
if key in self._peers:
del self._peers[key]
peers.discard(key)
# we are loosing this peer, not point to schedule more process work
elif action == ACTION.LATER:
io = peer.socket()
if io != -1:
self._poller.register(
io,
select.POLLIN | select.POLLPRI | select.POLLHUP
| select.POLLNVAL | select.POLLERR)
workers[io] = key
# no need to come back to it before a a full cycle
peers.discard(key)
elif action == ACTION.NOW:
sleep = 0
if not peers:
break
# read at least on message per process if there is some and parse it
for service, command in self.processes.received():
self.api.text(self, service, command)
sleep = 0
self.asynchronous.run()
if api_fds != self.processes.fds:
for fd in api_fds:
if fd == -1:
continue
if fd not in self.processes.fds:
self._poller.unregister(fd)
for fd in self.processes.fds:
if fd == -1:
continue
if fd not in api_fds:
self._poller.register(
fd,
select.POLLIN | select.POLLPRI | select.POLLHUP
| select.POLLNVAL | select.POLLERR)
api_fds = self.processes.fds
for io in self._wait_for_io(sleep):
if io not in api_fds:
peers.add(workers[io])
if self._stopping and not self._peers.keys():
self._termination('exiting on peer termination',
self.Exit.normal)
except KeyboardInterrupt:
self._termination('^C received', self.Exit.normal)
except SystemExit:
self._termination('exiting', self.Exit.normal)
# socket.error is a subclass of IOError (so catch it first)
except socket.error:
self._termination('socket error received', self.Exit.socket)
except IOError:
self._termination(
'I/O Error received, most likely ^C during IO',
self.Exit.io_error)
except ProcessError:
self._termination(
'Problem when sending message(s) to helper program, stopping',
self.Exit.process)
except select.error:
self._termination('problem using select, stopping',
self.Exit.select)
return self.exit_code