def received (self):
consumed_data = False
for process in list(self._process):
try:
proc = self._process[process]
# proc.poll returns None if the process is still fine
# -[signal], like -15, if the process was terminated
if proc.poll() is not None and self.reactor.respawn:
raise ValueError('child died')
r,_,_ = select.select([proc.stdout,],[],[],0)
if r:
try:
while True:
line = proc.stdout.next().rstrip()
consumed_data = True
self.logger.processes("Command from process %s : %s " % (process,line))
yield (process,formated(line))
except IOError,exc:
if not exc.errno or exc.errno in error.fatal:
# if the program exists we can get an IOError with errno code zero !
self.logger.processes("Issue with the process' PIPE, terminating it and restarting it")
self._terminate(process)
self._start(process)
elif exc.errno in error.block:
# we often see errno.EINTR: call interrupted and
# we most likely have data, we will try to read them a the next loop iteration
pass
else:
self.logger.processes("unexpected errno received from forked process (%s)" % errstr(exc))
except StopIteration:
if not consumed_data:
self.logger.processes("The process died, trying to respawn it")
self._terminate(process)
self._start(process)
def parse_api_vpls (self,command,peers,action):
tokens = formated(command).split(' ')[1:]
if len(tokens) < 4:
return False
if tokens[0] != 'vpls':
return False
changes = []
if 'self' in command:
for peer,nexthop in peers.iteritems():
scope = [{}]
self._nexthopself = nexthop
if not self._single_l2vpn_vpls(scope,tokens[1:]):
self._nexthopself = None
return False
for change in scope[0]['announce']:
changes.append((peer,change))
self._nexthopself = None
else:
scope = [{}]
if not self._single_l2vpn_vpls(scope,tokens[1:]):
return False
for peer in peers:
for change in scope[0]['announce']:
changes.append((peer,change))
if action == 'withdraw':
for (peer,change) in changes:
change.nlri.action = OUT.withdraw # pylint: disable=E1101
return changes
def api_vpls (self, command, peers, action):
tokens = formated(command).split(' ')[1:]
if len(tokens) < 4:
return False
if tokens[0] != 'vpls':
return False
changes = []
if 'self' in command:
for peer,nexthop in peers.iteritems():
scope = [{}]
self._nexthopself = nexthop
if not self._single_l2vpn_vpls(scope,tokens[1:]):
self._nexthopself = None
return False
for change in scope[0]['announce']:
changes.append((peer,change))
self._nexthopself = None
else:
scope = [{}]
if not self._single_l2vpn_vpls(scope,tokens[1:]):
return False
for peer in peers:
for change in scope[0]['announce']:
changes.append((peer,change))
if action == 'withdraw':
for (peer,change) in changes:
change.nlri.action = OUT.WITHDRAW
return changes
def api_refresh (self, command):
tokens = formated(command).split(' ')[2:]
if len(tokens) != 2:
return False
afi = AFI.value(tokens.pop(0))
safi = SAFI.value(tokens.pop(0))
if afi is None or safi is None:
return False
return RouteRefresh(afi,safi)
def parse_api_refresh (self,command):
tokens = formated(command).split(' ')[2:]
if len(tokens) != 2:
return False
afi = AFI.value(tokens.pop(0))
safi = SAFI.value(tokens.pop(0))
if afi is None or safi is None:
return False
return RouteRefresh(afi,safi)
def parse_api_operational(self, command):
tokens = formated(command).split(' ', 2)
scope = [{}]
if len(tokens) != 3:
return False
operational = tokens[0].lower()
what = tokens[1].lower()
if operational != 'operational':
return False
if what == 'asm':
if not self._single_operational(Advisory.ASM, scope,
['afi', 'safi', 'advisory'],
tokens[2]):
return False
elif what == 'adm':
if not self._single_operational(Advisory.ADM, scope,
['afi', 'safi', 'advisory'],
tokens[2]):
return False
elif what == 'rpcq':
if not self._single_operational(
Query.RPCQ, scope, ['afi', 'safi', 'sequence'], tokens[2]):
return False
elif what == 'rpcp':
if not self._single_operational(
Response.RPCP, scope,
['afi', 'safi', 'sequence', 'counter'], tokens[2]):
return False
elif what == 'apcq':
if not self._single_operational(
Query.APCQ, scope, ['afi', 'safi', 'sequence'], tokens[2]):
return False
elif what == 'apcp':
if not self._single_operational(
Response.APCP, scope,
['afi', 'safi', 'sequence', 'counter'], tokens[2]):
return False
elif what == 'lpcq':
if not self._single_operational(
Query.LPCQ, scope, ['afi', 'safi', 'sequence'], tokens[2]):
return False
elif what == 'lpcp':
if not self._single_operational(
Response.LPCP, scope,
['afi', 'safi', 'sequence', 'counter'], tokens[2]):
return False
else:
return False
operational = scope[0]['operational'][0]
return operational
def parse_api_flow (self,command,action):
self._tokens = self._tokenise(' '.join(formated(command).split(' ')[2:]).split('\\n'))
scope = [{}]
if not self._dispatch(scope,'flow',['route',],[],['root']):
return False
if not self._check_flow_route(scope):
return False
changes = scope[0]['announce']
if action == 'withdraw':
for change in changes:
change.nlri.action = OUT.withdraw # pylint: disable=E1101
return changes
def parse_api_flow (self, command, action):
self._tokens = self._tokenise(' '.join(formated(command).split(' ')[2:]).split('\\n'))
scope = [{}]
if not self._dispatch(scope,'flow',['route',],[],['root']):
return False
if not self._check_flow_route(scope):
return False
changes = scope[0]['announce']
if action == 'withdraw':
for change in changes:
change.nlri.action = OUT.WITHDRAW
return changes
def api_flow (self, command, action):
tokens = formated(command).split(' ',2)[2].replace('\\n','\n').replace('{','{\n').replace('}','}\n').replace(';',';\n').replace('\n\n','\n')
self.tokens.set_text(tokens)
scope = [{}]
if not self._dispatch(scope,'flow',['route',],[],['root']):
return False
if not self._check_flow_route(scope):
return False
changes = scope[0]['announce']
if action == 'withdraw':
for change in changes:
change.nlri.action = OUT.WITHDRAW
return changes
def received(self):
consumed_data = False
for process in list(self._process):
try:
proc = self._process[process]
# proc.poll returns None if the process is still fine
# -[signal], like -15, if the process was terminated
if proc.poll() is not None and self.reactor.respawn:
raise ValueError('child died')
r, _, _ = select.select([
proc.stdout,
], [], [], 0)
if r:
try:
while True:
# Calling next() on Linux and OSX works perfectly well
# but not on OpenBSD where it always raise StopIteration
# and only readline() works
raw = proc.stdout.readline()
line = raw.rstrip()
consumed_data = True
self.logger.processes(
"Command from process %s : %s " %
(process, line))
if raw == '':
raise IOError('Child process died')
yield (process, formated(line))
except IOError, exc:
if not exc.errno or exc.errno in error.fatal:
# if the program exists we can get an IOError with errno code zero !
self.logger.processes(
"Issue with the process' PIPE, terminating it and restarting it"
)
self._terminate(process)
self._start(process)
elif exc.errno in error.block:
# we often see errno.EINTR: call interrupted and
# we most likely have data, we will try to read them a the next loop iteration
pass
else:
self.logger.processes(
"unexpected errno received from forked process (%s)"
% errstr(exc))
except StopIteration:
if not consumed_data:
self.logger.processes(
"The process died, trying to respawn it")
self._terminate(process)
self._start(process)
def _tokenise (self,iterator):
for line in iterator:
replaced = formated(line)
if not replaced:
continue
if replaced.startswith('#'):
continue
command = replaced[:3]
if command in ('md5','asm'):
string = line.strip()[3:].strip()
if string[-1] == ';':
string = string[:-1]
yield [command,string,';']
elif replaced[:3] == 'run':
yield [t for t in replaced[:-1].split(' ',1) if t] + [replaced[-1]]
else:
yield [t.lower() for t in replaced[:-1].split(' ') if t] + [replaced[-1]]
def parse_api_flow(self, command, action):
command = command.replace('{', '{\\n').replace('}', '}\\n').replace(
';', ';\\n').replace('\\n\\n', '\\n')
self._tokens = self._tokenise(' '.join(
formated(command).split(' ')[2:]).split('\\n'))
scope = [{}]
if not self._dispatch(scope, 'flow', [
'route',
], [], ['root']):
return False
if not self._check_flow_route(scope):
return False
changes = scope[0]['announce']
if action == 'withdraw':
for change in changes:
change.nlri.action = OUT.WITHDRAW
return changes
def api_eor (self, command):
tokens = formated(command).split(' ')[2:]
number = len(tokens)
if not number:
return Family(1,1)
if number != 2:
return False
afi = AFI.fromString(tokens[0])
if afi == AFI.undefined:
return False
safi = SAFI.fromString(tokens[1])
if safi == SAFI.undefined:
return False
return Family(afi,safi)
def parse_api_eor (self,command):
tokens = formated(command).split(' ')[2:]
number = len(tokens)
if not number:
return Family(1,1)
if number != 2:
return False
afi = AFI.fromString(tokens[0])
if afi == AFI.undefined:
return False
safi = SAFI.fromString(tokens[1])
if safi == SAFI.undefined:
return False
return Family(afi,safi)
def api_operational (self, command):
tokens = formated(command).split(' ',2)
scope = [{}]
if len(tokens) != 3:
return False
operational = tokens[0].lower()
what = tokens[1].lower()
if operational != 'operational':
return False
if what == 'asm':
if not self._single_operational(Advisory.ASM,scope,['afi','safi','advisory'],tokens[2]):
return False
elif what == 'adm':
if not self._single_operational(Advisory.ADM,scope,['afi','safi','advisory'],tokens[2]):
return False
elif what == 'rpcq':
if not self._single_operational(Query.RPCQ,scope,['afi','safi','sequence'],tokens[2]):
return False
elif what == 'rpcp':
if not self._single_operational(Response.RPCP,scope,['afi','safi','sequence','counter'],tokens[2]):
return False
elif what == 'apcq':
if not self._single_operational(Query.APCQ,scope,['afi','safi','sequence'],tokens[2]):
return False
elif what == 'apcp':
if not self._single_operational(Response.APCP,scope,['afi','safi','sequence','counter'],tokens[2]):
return False
elif what == 'lpcq':
if not self._single_operational(Query.LPCQ,scope,['afi','safi','sequence'],tokens[2]):
return False
elif what == 'lpcp':
if not self._single_operational(Response.LPCP,scope,['afi','safi','sequence','counter'],tokens[2]):
return False
else:
return False
operational = scope[0]['operational'][0]
return operational
def parse_api_route (self,command,peers,action):
tokens = formated(command).split(' ')[1:]
number = len(tokens)
if number < 1:
return False
message = tokens[0]
if message not in ('route',):
return False
if number == 2 and action == 'withdraw' and 'next-hop' not in tokens:
tokens.extend(['next-hop','0.0.0.0'])
changes = []
if 'self' in command:
for peer,nexthop in peers.iteritems():
scope = [{}]
self._nexthopself = nexthop
if not self._single_static_route(scope,tokens[1:]):
self._nexthopself = None
return False
for change in scope[0]['announce']:
changes.append((peer,change))
self._nexthopself = None
else:
scope = [{}]
if not self._single_static_route(scope,tokens[1:]):
return False
for peer in peers:
for change in scope[0]['announce']:
changes.append((peer,change))
if action == 'withdraw':
for (peer,change) in changes:
change.nlri.action = OUT.withdraw # pylint: disable=E1101
return changes
def api_route (self, command, peers, action):
tokens = formated(command).split(' ')[1:]
number = len(tokens)
if number < 1:
return False
message = tokens[0]
if message not in ('route',):
return False
if number == 2 and action == 'withdraw' and 'next-hop' not in tokens:
tokens.extend(['next-hop','0.0.0.0'])
changes = []
if 'self' in command:
for peer,nexthop in peers.iteritems():
scope = [{}]
self._nexthopself = nexthop
if not self._single_static_route(scope,tokens[1:]):
self._nexthopself = None
return False
for change in scope[0]['announce']:
changes.append((peer,change))
self._nexthopself = None
else:
scope = [{}]
if not self._single_static_route(scope,tokens[1:]):
return False
for peer in peers:
for change in scope[0]['announce']:
changes.append((peer,change))
if action == 'withdraw':
for (peer,change) in changes:
change.nlri.action = OUT.WITHDRAW
return changes
def _single_operational (self, klass, scope, parameters, value):
def utf8 (string): return string.encode('utf-8')[1:-1]
convert = {
'afi': AFI.value,
'safi': SAFI.value,
'sequence': int,
'counter': long,
'advisory': utf8
}
def valid (_):
return True
def u32 (_):
return int(_) <= 0xFFFFFFFF
def u64 (_):
return long(_) <= 0xFFFFFFFFFFFFFFFF
def advisory (_):
return len(_.encode('utf-8')) <= MAX_ADVISORY + 2 # the two quotes
validate = {
'afi': AFI.value,
'safi': SAFI.value,
'sequence': u32,
'counter': u64,
}
number = len(parameters)*2
tokens = formated(value).split(' ',number-1)
if len(tokens) != number:
return self.error.set('invalid operational syntax, wrong number of arguments')
return False
data = {}
while tokens and parameters:
command = tokens.pop(0).lower()
value = tokens.pop(0)
if command == 'router-id':
if isipv4(value):
data['routerid'] = RouterID(value)
else:
return self.error.set('invalid operational value for %s' % command)
return False
continue
expected = parameters.pop(0)
if command != expected:
return self.error.set('invalid operational syntax, unknown argument %s' % command)
return False
if not validate.get(command,valid)(value):
return self.error.set('invalid operational value for %s' % command)
return False
data[command] = convert[command](value)
if tokens or parameters:
return self.error.set('invalid advisory syntax, missing argument(s) %s' % ', '.join(parameters))
return False
if 'routerid' not in data:
data['routerid'] = None
if 'operational-message' not in scope[-1]:
scope[-1]['operational-message'] = []
# iterate on each family for the peer if multiprotocol is set.
scope[-1]['operationa-messagel'].append(klass(**data))
return True
