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"""
Infrastructure for testing avahi
"""
import salutservicetest as servicetest
from salutservicetest import Event, TimeoutError
import dbus
import dbus.glib
import avahi
import os
def get_server():
bus = dbus.SystemBus()
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
avahi.DBUS_PATH_SERVER), avahi.DBUS_INTERFACE_SERVER)
return server
def get_host_name():
return get_server().GetHostName()
def get_host_name_fqdn():
return get_server().GetHostNameFqdn()
def get_domain_name():
return get_server().GetDomainName()
def txt_get_key(txt, key):
for x in txt:
if dbus.Byte('=') in x:
(rkey, value) = avahi.byte_array_to_string(x).split('=', 1)
if rkey == key:
return value
return None
class AvahiService:
def __init__(self, event_queue, bus, server, interface, protocol, name,
type, domain, aprotocol, flags):
self.event_queue = event_queue
self.server = server
self.bus = bus
self.interface = interface
self.protocol = protocol
self.name = name
self.type = type
self.domain = domain
self.aprotocol = aprotocol
self.flags = flags
def resolve(self):
resolver_path = self.server.ServiceResolverNew(self.interface,
self.protocol, self.name, self.type, self.domain,
self.aprotocol, self.flags)
resolver_obj = self.bus.get_object(avahi.DBUS_NAME, resolver_path)
resolver = dbus.Interface(resolver_obj,
avahi.DBUS_INTERFACE_SERVICE_RESOLVER)
resolver.connect_to_signal('Found', self._service_found)
resolver.connect_to_signal('Failed', self._service_failed)
def _service_found(self, interface, protocol, name, stype, domain,
host_name, aprotocol, pt, port, txt, flags):
e = Event('service-resolved', service = self,
interface = interface, protocol = protocol, name = name,
stype = stype, host_name = host_name, aprotocol = aprotocol,
pt = pt, port = port, txt = txt, flags = flags)
self.event_queue.append(e)
def _service_failed(self, error):
e = Event('service-failed', service = self, error = error)
self.event_queue.append(e)
class AvahiListener:
def __init__(self, event_queue):
self.event_queue = event_queue
self.bus = dbus.SystemBus()
self.server = dbus.Interface(self.bus.get_object(avahi.DBUS_NAME,
avahi.DBUS_PATH_SERVER), avahi.DBUS_INTERFACE_SERVER)
self.browsers = []
def _service_added_cb(self, interface, protocol, name, stype, domain,
flags):
service = AvahiService(self.event_queue, self.bus, self.server,
interface, protocol, name, stype,
domain, protocol, 0)
e = Event ('service-added', service = service,
interface=interface, protocol=protocol, name=name, stype=stype,
domain=domain, flags=flags)
self.event_queue.append(e)
def _service_removed_cb(self, interface, protocol, name, stype, domain,
flags):
e = Event ('service-removed',
interface=interface, protocol=protocol, name=name, stype=stype,
domain=domain, flags=flags)
self.event_queue.append(e)
def _all_for_now_cb(self):
self.event_queue.append(Event('service-all-for-now'))
def listen_for_service(self, sname):
browser_path = self.server.ServiceBrowserNew(avahi.IF_UNSPEC,
avahi.PROTO_UNSPEC, sname, "local", dbus.UInt32(0));
browser_obj = self.bus.get_object(avahi.DBUS_NAME, browser_path)
browser = dbus.Interface(browser_obj,
avahi.DBUS_INTERFACE_SERVICE_BROWSER)
browser.connect_to_signal('ItemNew', self._service_added_cb)
browser.connect_to_signal('ItemRemove', self._service_removed_cb)
browser.connect_to_signal('AllForNow', self._all_for_now_cb)
self.browsers.append(browser)
return self
class AvahiRecordAnnouncer:
def __init__(self, name, clazz, type, data):
self.name = name
self.clazz = clazz
self.type = type
self.data = data
self.bus = dbus.SystemBus()
self.server = dbus.Interface(self.bus.get_object(avahi.DBUS_NAME,
avahi.DBUS_PATH_SERVER), avahi.DBUS_INTERFACE_SERVER)
entry_path = self.server.EntryGroupNew()
entry_obj = self.bus.get_object(avahi.DBUS_NAME, entry_path)
entry = dbus.Interface(entry_obj,
avahi.DBUS_INTERFACE_ENTRY_GROUP)
entry.AddRecord(avahi.IF_UNSPEC, avahi.PROTO_INET,
dbus.UInt32(0), name, clazz, type, 120, data)
entry.Commit()
self.entry = entry
class AvahiAnnouncer:
def __init__(self, name, type, port, txt, hostname=None,
proto=avahi.PROTO_INET):
self.name = name
self.type = type
self.port = port
self.txt = txt
self.proto = proto
self.bus = dbus.SystemBus()
self.server = dbus.Interface(self.bus.get_object(avahi.DBUS_NAME,
avahi.DBUS_PATH_SERVER), avahi.DBUS_INTERFACE_SERVER)
entry_path = self.server.EntryGroupNew()
entry_obj = self.bus.get_object(avahi.DBUS_NAME, entry_path)
entry = dbus.Interface(entry_obj,
avahi.DBUS_INTERFACE_ENTRY_GROUP)
if hostname is None:
hostname = get_host_name_fqdn()
entry.AddService(avahi.IF_UNSPEC, self.proto,
dbus.UInt32(0), name, type, get_domain_name(), hostname,
port, avahi.dict_to_txt_array(txt))
entry.Commit()
self.entry = entry
def update(self, txt):
self.txt.update(txt)
self.entry.UpdateServiceTxt(avahi.IF_UNSPEC, self.proto,
dbus.UInt32(0), self.name, self.type, get_domain_name(),
avahi.dict_to_txt_array(self.txt))
def set(self, txt):
self.txt = txt
self.entry.UpdateServiceTxt(avahi.IF_UNSPEC, self.proto,
dbus.UInt32(0), self.name, self.type, get_domain_name(),
avahi.dict_to_txt_array(self.txt))
def stop(self):
self.entry.Free()
def check_ipv6_enabled(q, announcer):
# Avahi doesn't complain if we try to announce an IPv6 service with a
# not IPv6 enabled Avahi (http://www.avahi.org/ticket/264) so we try to
# resolve our own service to check if it has been actually announced.
service = AvahiService(q, announcer.bus, announcer.server,
avahi.IF_UNSPEC, announcer.proto, announcer.name,
announcer.type, get_domain_name(), avahi.PROTO_INET6, 0)
service.resolve()
try:
q.expect('service-resolved', service=service)
return True
except TimeoutError:
return False
def has_another_llxmpp():
if 'SALUT_TEST_REAL_AVAHI' not in os.environ:
return False
q = servicetest.IteratingEventQueue()
l = AvahiListener(q)
l.listen_for_service('_presence._tcp')
has = False
while True:
e = q.wait(['service'])
if (e.type == 'service-added' and
e.flags & (avahi.LOOKUP_RESULT_LOCAL|avahi.LOOKUP_RESULT_OUR_OWN)):
has = True
elif e.type == 'service-all-for-now':
break
return has
def skip_if_another_llxmpp():
if has_another_llxmpp():
print ("SKIP: This test fails if there is another LL XMPP instance "
"running on the machine.")
# exiting 77 causes automake to consider the test to have been skipped
raise SystemExit(77)
if __name__ == '__main__':
from twisted.internet import reactor
txtdict = { "test0": "0", "test1": "1" }
a = AvahiAnnouncer("test", "_test._tcp", 1234, txtdict)
q = servicetest.IteratingEventQueue()
# Set verboseness if needed for debugging
# q.verbose = True
l = AvahiListener(q)
l.listen_for_service("_test._tcp")
while True:
e = q.expect ('service-added', stype='_test._tcp')
# Only care about services we announced ourselves
if e.flags & (avahi.LOOKUP_RESULT_LOCAL|avahi.LOOKUP_RESULT_OUR_OWN):
break
assert "test" == e.name[0:len("test")]
s = e.service
s.resolve()
e = q.expect('service-resolved', service = s)
for (key, val ) in txtdict.iteritems():
v = txt_get_key(e.txt, key)
assert v == val, (key, val, v)
txtdict["test1"] = "2"
txtdict["test2"] = "2"
a.update(txtdict)
e = q.expect('service-resolved', service = s)
for (key, val ) in txtdict.iteritems():
v = txt_get_key(e.txt, key)
assert v == val, (key, val, v)
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