def bindOnUnusedPort(sock, host='localhost'):
"""Bind the socket to a free port and return the port number.
This code is based on the code in the stdlib's test.test_support module."""
if os.name != "java" and sock.family in (socket.AF_INET, socket.AF_INET6) and sock.type == socket.SOCK_STREAM:
if hasattr(socket, "SO_EXCLUSIVEADDRUSE"):
# even though Jython has this socket option, it doesn't support it. Hence the check in the if statement above.
sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE, 1)
if sock.family == socket.AF_INET:
if host == 'localhost':
sock.bind(('127.0.0.1', 0))
else:
sock.bind((host, 0))
elif sock.family == socket.AF_INET6:
if host == 'localhost':
sock.bind(('::1', 0, 0, 0))
else:
sock.bind((host, 0, 0, 0))
else:
raise CommunicationError("unsupported socket family: " + sock.family)
if os.name == "java":
try:
sock.listen(100) # otherwise jython always just returns 0 for the port
except Exception:
pass # jython sometimes throws errors here
port = sock.getsockname()[1]
return port
def getIpVersion(hostnameOrAddress):
"""
Determine what the IP version is of the given hostname or ip address (4 or 6).
First, it resolves the hostname or address to get an IP address.
Then, if the resolved IP contains a ':' it is considered to be an ipv6 address,
and if it contains a '.', it is ipv4.
"""
address = getIpAddress(hostnameOrAddress)
if "." in address:
return 4
elif ":" in address:
return 6
else:
raise CommunicationError("Unknown IP address format" + address)
def bindOnUnusedPort(sock, host='localhost'):
"""Bind the socket to a free port and return the port number.
This code is based on the code in the stdlib's test.test_support module."""
if sock.family in (socket.AF_INET,
socket.AF_INET6) and sock.type == socket.SOCK_STREAM:
if hasattr(socket, "SO_EXCLUSIVEADDRUSE"):
sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE, 1)
if sock.family == socket.AF_INET:
if host == 'localhost':
sock.bind(('127.0.0.1', 0))
else:
sock.bind((host, 0))
elif sock.family == socket.AF_INET6:
if host == 'localhost':
sock.bind(('::1', 0, 0, 0))
else:
sock.bind((host, 0, 0, 0))
else:
raise CommunicationError("unsupported socket family: " + sock.family)
return sock.getsockname()[1]