def _browse_callback(self, _sdref, flags, interface, error_code,
service_name, regtype, reply_domain):
log.debug('Found service %s in domain %s on %i(type: %s).',
service_name, reply_domain, interface, regtype)
if not self.connected:
return
if error_code != kDNSServiceErr_NoError:
log.debug('Error in browse_callback: %s', str(error_code))
return
if not flags & kDNSServiceFlagsAdd:
self._remove_service_callback(service_name)
return
try:
# asynchronous resolving
resolve_sdref = None
resolve_sdref = DNSServiceResolve(0, interface, service_name,
regtype, reply_domain,
self._service_resolved_callback)
while not self._resolved:
ready = select.select([resolve_sdref], [], [], resolve_timeout)
if resolve_sdref not in ready[0]:
log.info('Resolve timed out')
break
DNSServiceProcessResult(resolve_sdref)
else:
self._resolved.pop()
except BonjourError as error:
log.info('Error when resolving DNS: %s', error)
finally:
if resolve_sdref:
resolve_sdref.close()
def browse_loop(self):
try:
ready = select.select([self._browse_sdref], [], [], 0)
if self._browse_sdref in ready[0]:
DNSServiceProcessResult(self._browse_sdref)
except BonjourError as error:
if error.errorCode == kDNSServiceErr_ServiceNotRunning:
log.info('Service not running')
return False
log.error('Error while browsing for services. %s', error)
return True
def fetch_bonjour(_service, alias='Bonjour', timeout=0.1):
cache = path.join(alfred.work(volatile=True), 'bonjour.1.json')
if path.isfile(cache) and (time() - path.getmtime(cache) < 60):
return (json.load(open(cache, 'r')), alias)
results = set()
try:
from pybonjour import DNSServiceBrowse, DNSServiceProcessResult
from select import select
bj_callback = lambda s, f, i, e, n, t, d: results.add('%s.%s' % (
n.lower(), d[:-1]))
bj_browser = DNSServiceBrowse(regtype=_service, callBack=bj_callback)
select([bj_browser], [], [], timeout)
DNSServiceProcessResult(bj_browser)
bj_browser.close()
except ImportError:
pass
json.dump(list(results), open(cache, 'w'))
return (results, alias)
def fetch_bonjour(_service='_ssh._tcp', alias='Bonjour', timeout=0.1):
if int(os.getenv('alfredssh_bonjour', 1)) != 1:
return (alias, ())
cache = cache_file('bonjour.1.json')
if os.path.isfile(cache) and (time() - os.path.getmtime(cache) < 60):
return (alias, json.load(open(cache, 'r')))
results = set()
try:
from pybonjour import DNSServiceBrowse, DNSServiceProcessResult
from select import select
bj_callback = lambda s, f, i, e, n, t, d: results.add('{}.{}'.format(n.lower(), d[:-1]))
bj_browser = DNSServiceBrowse(regtype=_service, callBack=bj_callback)
select([bj_browser], [], [], timeout)
DNSServiceProcessResult(bj_browser)
bj_browser.close()
except ImportError:
pass
json.dump(list(results), open(cache, 'w'))
return (alias, results)
def resolve_all(self):
if not self.connected:
return False
# for now put here as this is synchronous
if not self.browse_loop():
return False
# Monitor TXT Records with DNSServiceQueryRecord because
# its more efficient (see pybonjour documentation)
for val in self._contacts.values():
bare_name = val[Constant.RESOLVED_INFO][0][Constant.BARE_NAME]
try:
query_sdref = None
query_sdref = \
DNSServiceQueryRecord(
interfaceIndex=kDNSServiceInterfaceIndexAny,
fullname=bare_name,
rrtype=kDNSServiceType_TXT,
callBack=self._query_txt_callback)
while not self._queried:
ready = select.select([query_sdref], [], [],
resolve_timeout)
if query_sdref not in ready[0]:
log.info('Query record timed out')
break
DNSServiceProcessResult(query_sdref)
else:
self._queried.pop()
except BonjourError as error:
if error.errorCode == kDNSServiceErr_ServiceNotRunning:
log.info('Service not running')
return False
log.error('Error in query for TXT records. %s', error)
finally:
if query_sdref:
query_sdref.close()
return True
def _create_service(self):
txt = {}
# remove empty keys
for key, val in self.txt.items():
if val:
txt[key] = val
txt['port.p2pj'] = self.port
txt['version'] = 1
txt['txtvers'] = 1
# replace gajim's show messages with compatible ones
if 'status' in self.txt:
txt['status'] = self._replace_show(self.txt['status'])
else:
txt['status'] = 'avail'
self.txt = txt
try:
self._service_sdref = DNSServiceRegister(
flags=kDNSServiceFlagsNoAutoRename,
name=self.name,
regtype=self.stype,
port=self.port,
txtRecord=TXTRecord(self.txt, strict=True),
callBack=self.service_added_callback)
log.info('Publishing service %s of type %s', self.name, self.stype)
ready = select.select([self._service_sdref], [], [])
if self._service_sdref in ready[0]:
DNSServiceProcessResult(self._service_sdref)
except BonjourError as error:
if error.errorCode == kDNSServiceErr_ServiceNotRunning:
log.info('Service not running')
else:
self._error_cb(_('Error while adding service. %s') % error)
self.disconnect()
def _service_resolved_callback(self, _sdref, _flags, interface, error_code,
fullname, hosttarget, port, txt_record):
if error_code != kDNSServiceErr_NoError:
log.error('Error in service_resolved_callback: %s',
str(error_code))
return
self._resolved_hosts[hosttarget] = (fullname, port, txt_record)
try:
getaddrinfo_sdref = \
DNSServiceGetAddrInfo(
interfaceIndex=interface,
hostname=hosttarget,
callBack=self._getaddrinfo_callback)
while not self._queried:
ready = select.select([getaddrinfo_sdref], [], [],
resolve_timeout)
if getaddrinfo_sdref not in ready[0]:
log.warning('GetAddrInfo timed out')
break
DNSServiceProcessResult(getaddrinfo_sdref)
else:
self._queried.pop()
except BonjourError as error:
if error.error_code == kDNSServiceErr_ServiceNotRunning:
log.info('Service not running')
else:
self._error_cb(_('Error while adding service. %s') % error)
finally:
if getaddrinfo_sdref:
getaddrinfo_sdref.close()
self._resolved.append(True)
def wait_on_event(self, sdRef, event):
while not event.isSet():
ready = select.select([sdRef], [], [], self.timeout)
self.assertTrue(sdRef in ready[0], 'operation timed out')
DNSServiceProcessResult(sdRef)