def test_get_local_addresses(self):
# mostly a tripwire test
from roslib.network import get_local_addresses
addrs = get_local_addresses()
self.assert_(type(addrs) == list)
self.assert_(len(addrs))
for a in addrs:
self.assert_(type(a) == str)
# should be unaffected
os.environ['ROS_IP'] = 'bar'
self.assertEquals(addrs, get_local_addresses())
os.environ['ROS_HOSTNAME'] = 'foo'
self.assertEquals(addrs, get_local_addresses())
def test_get_local_addresses(self):
# mostly a tripwire test
from roslib.network import get_local_addresses
addrs = get_local_addresses()
self.assert_(type(addrs) == list)
self.assert_(len(addrs))
for a in addrs:
self.assert_(type(a) == str)
# should be unaffected
os.environ['ROS_IP'] = 'bar'
self.assertEquals(addrs, get_local_addresses())
os.environ['ROS_HOSTNAME'] = 'foo'
self.assertEquals(addrs, get_local_addresses())
def __is_local(hostname):
'''
Test the hostname whether it is local or not. Uses socket.gethostbyname().
'''
try:
# If Python has ipv6 disabled but machine.address can be resolved somehow to an ipv6 address, then host[4][0] will be int
machine_ips = [
host[4][0]
for host in socket.getaddrinfo(hostname, 0, 0, 0, socket.SOL_TCP)
if isinstance(host[4][0], str)
]
except socket.gaierror:
with _LOCK:
rospy.logdebug("host::HOSTS_CACHE resolve %s failed" % hostname)
HOSTS_CACHE[hostname] = False
return False
local_addresses = ['localhost'] + network.get_local_addresses()
# check 127/8 and local addresses
result = ([
ip for ip in machine_ips if (ip.startswith('127.') or ip == '::1')
] != []) or (set(machine_ips) & set(local_addresses) != set())
with _LOCK:
rospy.logdebug("host::HOSTS_CACHE add %s:%s" % (hostname, result))
HOSTS_CACHE[hostname] = result
return result
def __is_local(cls, hostname):
try:
machine_addr = socket.gethostbyname(hostname)
except socket.gaierror:
import traceback
print traceback.format_exc()
return False
local_addresses = ['localhost'] + get_local_addresses()
# check 127/8 and local addresses
result = machine_addr.startswith('127.') or machine_addr in local_addresses
return result
def __is_local(cls, hostname):
try:
machine_addr = socket.gethostbyname(hostname)
except socket.gaierror:
import traceback
print traceback.format_exc()
return False
local_addresses = ['localhost'] + get_local_addresses()
# check 127/8 and local addresses
result = machine_addr.startswith('127.') or machine_addr in local_addresses
return result
def is_local(hostname, wait=True):
'''
Test whether the given host name is the name of the local host or not.
:param str hostname: the name or IP of the host
:return: `True` if the hostname is local or None
:rtype: bool
:raise Exception: on errors while resolving host
'''
if not hostname:
return True
with _LOCK:
if hostname in HOSTS_CACHE:
if isinstance(HOSTS_CACHE[hostname], threading.Thread):
return False
return HOSTS_CACHE[hostname]
try:
socket.inet_aton(hostname)
local_addresses = ['localhost'] + network.get_local_addresses()
# check 127/8 and local addresses
result = hostname.startswith(
'127.') or hostname == '::1' or hostname in local_addresses
with _LOCK:
rospy.logdebug("host::HOSTS_CACHE add local %s:%s" %
(hostname, result))
HOSTS_CACHE[hostname] = result
return result
except socket.error:
# the hostname must be resolved => do it in a thread
if wait:
result = __is_local(hostname)
return result
else:
thread = threading.Thread(target=__is_local, args=((hostname, )))
thread.daemon = True
with _LOCK:
HOSTS_CACHE[hostname] = thread
thread.start()
return False
def is_local(cls, hostname, wait=False):
'''
Test whether the given host name is the name of the local host or not.
@param hostname: the name or IP of the host
@type hostname: C{str}
@return: C{True} if the hostname is local or None
@rtype: C{bool}
@raise Exception: on errors while resolving host
'''
if (hostname is None):
return True
try:
socket.inet_aton(hostname)
local_addresses = ['localhost'] + get_local_addresses()
# check 127/8 and local addresses
result = hostname.startswith('127.') or hostname in local_addresses
return result
except socket.error:
# the hostname must be resolved => do it in a thread
if wait:
result = cls.__is_local(hostname)
return result
return False
def is_local(cls, hostname, wait=False):
'''
Test whether the given host name is the name of the local host or not.
@param hostname: the name or IP of the host
@type hostname: C{str}
@return: C{True} if the hostname is local or None
@rtype: C{bool}
@raise Exception: on errors while resolving host
'''
if (hostname is None):
return True
try:
socket.inet_aton(hostname)
local_addresses = ['localhost'] + get_local_addresses()
# check 127/8 and local addresses
result = hostname.startswith('127.') or hostname in local_addresses
return result
except socket.error:
# the hostname must be resolved => do it in a thread
if wait:
result = cls.__is_local(hostname)
return result
return False
