def testFiles(self):
FILE_OUT = "/tmp/udtsocket_test_out.txt"
sock1 = UDTSocket()
sock2 = UDTSocket()
sock1.bind("0.0.0.0:7015")
sock1.listen()
other_thread = threading.Thread(target=self.sendFile, args=(sock2, ))
other_thread.start()
sock, _ = sock1.accept()
sock.recvfile(FILE_OUT, 0, len(UDTSocketTest.CONTENTS))
with open(FILE_OUT, "r") as fr:
self.assertEqual(UDTSocketTest.CONTENTS, fr.read())
os.remove(FILE_OUT)
other_thread.join()
def testFiles(self):
FILE_OUT = "/tmp/udtsocket_test_out.txt"
sock1 = UDTSocket()
sock2 = UDTSocket()
sock1.bind("0.0.0.0:7015")
sock1.listen()
other_thread = threading.Thread(target=self.sendFile, args=(sock2,))
other_thread.start()
sock, _ = sock1.accept()
sock.recvfile(FILE_OUT, 0, len(UDTSocketTest.CONTENTS))
with open(FILE_OUT, "r") as fr:
self.assertEqual(UDTSocketTest.CONTENTS, fr.read())
os.remove(FILE_OUT)
other_thread.join()
class UDTEpollTest(unittest.TestCase):
def testEpoll(self):
self.socket = UDTSocket()
self.socket.bind("0.0.0.0:7015")
self.socket.listen()
other_thread = threading.Thread(target=self.otherConnect)
other_thread.start()
sock, _ = self.socket.accept()
poll = UDTEpoll()
poll.add(sock)
rs = []
while len(rs) == 0:
rs, ws, _, _ = poll.wait()
self.assertEqual(sock, rs[0])
self.assertEqual(sock, ws[0])
msg = bytearray(5)
sock.recv(msg)
def otherConnect(self):
sock = UDTSocket()
sock.connect("127.0.0.1:7015")
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
sock.send(b"hello")
class UDTEpollTest(unittest.TestCase):
def testEpoll(self):
self.socket = UDTSocket()
self.socket.bind("0.0.0.0:7015")
self.socket.listen()
other_thread = threading.Thread(target=self.otherConnect)
other_thread.start()
sock, _ = self.socket.accept()
poll = UDTEpoll()
poll.add(sock)
rs = []
while len(rs) == 0:
rs, ws, _, _ = poll.wait()
self.assertEqual(sock, rs[0])
self.assertEqual(sock, ws[0])
msg = bytearray(5)
sock.recv(msg)
def otherConnect(self):
sock = UDTSocket()
sock.connect("127.0.0.1:7015")
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
sock.send(b"hello")
argv[1] = argv[1][6:]
HOST, PORT = argv[1].split(':')
addr = (HOST, int(PORT))
N = int(argv[2])
if sock_type == "udt":
sock = UDTSocket()
sock.UDP_SNDBUF = 512 * 1024
sock.UDP_RCVBUF = 2 * 1024 * 1024
sock.UDT_SNDBUF = (15 * 1000 + 1000) * 1000
sock.UDT_RCVBUF = (15 * 1000 + 1000) * 1000
elif sock_type == "tcp":
sock = socket.socket()
else:
raise Exception("Socket type \"%s\" is not supported" % sock_type)
if argv[1].startswith("0.0.0.0"):
sock.bind(addr)
sock.listen(1)
peer, _ = sock.accept()
start = time.time()
all = 0
if sock_type == "udt":
while all < N * SIZE:
all += peer.recv(msg)
else:
while all < N * SIZE:
msg = peer.recv(4096)
all += len(msg)
peer.send(b'0')
peer.close()
else:
sock.connect(addr)
class UDTSocketTest(unittest.TestCase):
def testOptions(self):
self.socket = UDTSocket()
self.assertEqual(socket.AF_INET, self.socket.family)
self.assertEqual(socket.SOCK_STREAM, self.socket.type)
self.assertTrue(self.socket.UDT_SNDSYN)
self.assertTrue(self.socket.UDT_RCVSYN)
self.assertEqual(65536, self.socket.UDP_SNDBUF)
self.assertEqual(12288000, self.socket.UDP_RCVBUF)
self.assertEqual(12058624, self.socket.UDT_SNDBUF)
self.assertEqual(12058624, self.socket.UDT_RCVBUF)
self.assertEqual(25600, self.socket.UDT_FC)
self.socket.UDP_SNDBUF = 1024001
self.assertEqual(1024001, self.socket.UDP_SNDBUF)
def testRecvSend(self):
self.socket = UDTSocket()
self.assertEqual(UDTSocket.Status.INIT, self.socket.status)
self.socket.bind("0.0.0.0:7013")
self.assertEqual(UDTSocket.Status.OPENED, self.socket.status)
self.assertEqual(("0.0.0.0", 7013), self.socket.address)
self.socket.listen()
self.assertEqual(UDTSocket.Status.LISTENING, self.socket.status)
other_thread = threading.Thread(target=self.otherConnect)
other_thread.start()
sock, _ = self.socket.accept()
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
self.assertEqual(socket.AF_INET, sock.family)
self.assertEqual(socket.SOCK_STREAM, sock.type)
self.assertEqual(("127.0.0.1", 7013), sock.address)
self.assertEqual("127.0.0.1", sock.peer_address[0][0:9])
msg = bytearray(5)
sock.recv(msg)
self.assertEqual(b"hello", msg)
msg = b"12345"
sock.recv(msg)
self.assertEqual(b"hello", msg)
buf = bytearray(6)
msg = memoryview(buf)[1:]
sock.recv(msg)
self.assertEqual(b"hello", msg)
other_thread.join()
def otherConnect(self):
sock = UDTSocket()
sock.connect("127.0.0.1:7013")
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
sock.send(b"hello")
sock.send(b"hello")
sock.send(b"hello")
def testNoBlock(self):
other_thread = threading.Thread(target=self.otherConnectNoBlock)
other_thread.start()
time.sleep(0.1)
self.socket = UDTSocket(type=socket.SOCK_DGRAM)
self.assertEqual(socket.SOCK_DGRAM, self.socket.type)
self.socket.UDT_RCVSYN = False
self.assertFalse(self.socket.UDT_RCVSYN)
self.socket.bind(("0.0.0.0", 7014))
self.socket.listen()
sock = None
while sock is None:
try:
sock, _ = self.socket.accept()
except UDTException as e:
self.assertEqual(UDTException.EASYNCRCV, e.error_code)
msg = bytearray(5)
msg[0] = 0
while msg[0] == 0:
try:
sock.recvmsg(msg)
except UDTException as e:
self.assertEqual(UDTException.EASYNCRCV, e.error_code)
self.assertEqual(b"hello", msg)
other_thread.join()
def otherConnectNoBlock(self):
sock = UDTSocket(type=socket.SOCK_DGRAM)
sock.UDT_SNDSYN = False
self.assertFalse(sock.UDT_SNDSYN)
while sock.status != UDTSocket.Status.CONNECTED:
try:
sock.connect("127.0.0.1:7014")
except UDTException as e:
self.assertEqual(UDTException.EASYNCRCV, e.error_code)
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
sock.sendmsg(b"hello")
CONTENTS = "contents123456"
def testFiles(self):
FILE_OUT = "/tmp/udtsocket_test_out.txt"
sock1 = UDTSocket()
sock2 = UDTSocket()
sock1.bind("0.0.0.0:7015")
sock1.listen()
other_thread = threading.Thread(target=self.sendFile, args=(sock2,))
other_thread.start()
sock, _ = sock1.accept()
sock.recvfile(FILE_OUT, 0, len(UDTSocketTest.CONTENTS))
with open(FILE_OUT, "r") as fr:
self.assertEqual(UDTSocketTest.CONTENTS, fr.read())
os.remove(FILE_OUT)
other_thread.join()
def sendFile(self, sock):
FILE_IN = "/tmp/udtsocket_test_in.txt"
with open(FILE_IN, "w") as fw:
fw.write(UDTSocketTest.CONTENTS)
sock.connect("127.0.0.1:7015")
sock.sendfile(FILE_IN)
os.remove(FILE_IN)
class ServerUDTManager:
def __init__(self, tcp_mode):
self.tcp_mode = tcp_mode
self.udt_sock = None
self.conn = None
self.sock = self.get_socket()
self.port = self.sock.getsockname()[1]
self.nonce = self.generate_nonce()
self.size = 0
def open_connection(self):
if not self.tcp_mode:
self.udt_sock = UDTSocket()
self.udt_sock.bind(self.sock.fileno())
self.udt_sock.listen()
listening_thread = threading.Thread(target=self.accept_and_verify)
listening_thread.start()
return (self.port, self.nonce)
def get_total_recieved(self):
return self.size
def accept_and_verify(self):
if not self.tcp_mode:
self.conn, addr = self.udt_sock.accept()
logger.info('Connected by %s', addr)
recvd_nonce = bytearray(NONCE_SIZE)
self.conn.recv(recvd_nonce)
recvd_nonce = str(recvd_nonce)
else:
self.conn, addr = self.sock.accept()
logger.info('Connected by %s', addr)
recvd_nonce = self.conn.recv(NONCE_SIZE)
if recvd_nonce != self.nonce:
fail(format("Received nonce %s doesn't match %s.", recvd_nonce, self.nonce))
logger.debug("Nonce verified.")
def receive_data(self, output_file, block_count, file_size):
"""
Receives data and writes it to disk, stops when it is no longer receiving
data.
"""
def receive_data_threaded(output_file, block_count, file_size):
logger.debug("Receiving data...")
output_file = open(output_file, "r+")
output_file.seek(block_count * CHUNK_SIZE)
self.size = block_count * CHUNK_SIZE
data = bytearray(CHUNK_SIZE)
if not self.tcp_mode:
while 1:
len_rec = self.conn.recv(data)
data = str(data)
output_file.write(data[:len_rec])
self.size += len_rec
if len_rec == 0 or str(self.size) == str(file_size):
break
else:
while 1:
data = self.conn.recv(CHUNK_SIZE)
output_file.write(data)
self.size += len(data)
if len(data) == 0:
break
logger.debug("Closing file... " + output_file.name)
output_file.close()
thread = threading.Thread(target=receive_data_threaded, args=(output_file, block_count, file_size))
thread.start()
return thread
def get_socket(self):
"""
Opens and returns a socket on an open port.
"""
s = None
if self.tcp_mode:
sock_type = socket.SOCK_STREAM
else:
sock_type = socket.SOCK_DGRAM
try:
s = socket.socket(socket.AF_INET, sock_type)
except socket.error as msg:
fail(msg)
try:
s.bind(('', 0))
if self.tcp_mode:
s.listen(1)
except socket.error as msg:
s.close()
fail(str(msg))
return s
def generate_nonce(self, length=NONCE_SIZE):
"""Generate pseudorandom number. Ripped from google."""
return ''.join([str(random.randint(0, 9)) for i in range(length)])
argv[1] = argv[1][6:]
HOST, PORT = argv[1].split(':')
addr = (HOST, int(PORT))
N = int(argv[2])
if sock_type == "udt":
sock = UDTSocket()
sock.UDP_SNDBUF = 512 * 1024
sock.UDP_RCVBUF = 2 * 1024 * 1024
sock.UDT_SNDBUF = (15 * 1000 + 1000) * 1000
sock.UDT_RCVBUF = (15 * 1000 + 1000) * 1000
elif sock_type == "tcp":
sock = socket.socket()
else:
raise Exception("Socket type \"%s\" is not supported" % sock_type)
if argv[1].startswith("0.0.0.0"):
sock.bind(addr)
sock.listen(1)
peer, _ = sock.accept()
start = time.time()
all = 0
if sock_type == "udt":
while all < N * SIZE:
all += peer.recv(msg)
else:
while all < N * SIZE:
msg = peer.recv(4096)
all += len(msg)
peer.send(b'0')
peer.close()
else:
sock.connect(addr)
def pair(
pairing_name: str,
api_key: str = 'serverlessnetworkingfreetrial',
local_port: int = 10000,
remote_port: int = 10000,
natpunch_timeout: int = 30,
natpunch_server: str = 'services.serverlesstech.net/natpunch'
) -> UDTSocket:
"""
Connect to a remote networking peer.
Performs both NAT punching and rendezvous. The result is a new UDTSocket instance
ready to perform reliable messaging and file transfers.
Parameters:
pairing_name (str): Virtual address; both sides must use the same pairing_name to connect. Required argument.
api_key (str): API key to pass to NAT punch web socket. Optional, defaults to 'serverlessnetworkingfreetrial' (which is only valid if natpunch_server is set to the default)
local_port (int): UDP port number to use on this side of the connection. Optional, defaults to 10000.
remote_port (int): UDP port number to use for the remote side of the connection. Optional, defaults to 10000.
natpunch_timeout (int): Seconds to wait attempting to NAT punch/pair. Optional, defaults to 30. Note that rendezvous has a separate, udt-specified timeout.
natpunch_server (str): Host and path portion of URL to use for websocket NAT punch operation. Optional, defaults to services.serverlesstech.net/natpunch.
Returns:
UDTSocket: A new UDTSocket instance representing the p2p connection for pairing_name, or None if NAT punching failed. Clients should
check the status of the socket to ensure it's in a CONNECTED state before proceeding to use it.
"""
# Create a version of the websocket client class that handles AWS sigv4
# authorization by overriding the 'write_http_request' method with the
# logic to construct an x-amzn-auth header at the last possible moment.
class WebSocketSigv4ClientProtocol(websockets.WebSocketClientProtocol):
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
def write_http_request(self, path: str, headers) -> None:
# Intercept the GET that initiates the websocket protocol at the point where
# all of its 'real' headers have been constructed. Add in the sigv4 header AWS needs.
credentials = Credentials(os.environ['AWS_ACCESS_KEY_ID'],
os.environ['AWS_SECRET_ACCESS_KEY'],
os.environ['AWS_SESSION_TOKEN'])
sigv4 = SigV4Auth(credentials, 'execute-api',
os.environ['AWS_REGION'])
request = AWSRequest(method='GET',
url='https://' + natpunch_server)
sigv4.add_auth(request)
prepped = request.prepare()
headers['Authorization'] = prepped.headers['Authorization']
headers['X-Amz-Date'] = prepped.headers['X-Amz-Date']
headers['x-amz-security-token'] = prepped.headers[
'x-amz-security-token']
# Run the original code with the added sigv4 auth header now included:
super().write_http_request(path, headers)
async def natpunch():
if (not 'AWS_ACCESS_KEY_ID' in os.environ):
raise Exception(
'missing environment variable(s) required for signing',
'AWS_ACCESS_KEY_ID not present')
if (not 'AWS_SECRET_ACCESS_KEY' in os.environ):
raise Exception(
'missing environment variable(s) required for signing',
'AWS_SECRET_ACCESS_KEY not present')
if (not 'AWS_SESSION_TOKEN' in os.environ):
raise Exception(
'missing environment variable(s) required for signing',
'AWS_SESSION_TOKEN not present')
if (not 'AWS_REGION' in os.environ):
raise Exception(
'missing environment variable(s) required for signing',
'AWS_REGION not present')
async with websockets.connect(
'wss://' + natpunch_server,
create_protocol=WebSocketSigv4ClientProtocol,
extra_headers={'x-api-key': api_key}) as websocket:
msg_as_string = json.dumps({
"action": "pair",
"pairing_name": pairing_name
})
await websocket.send(msg_as_string)
try:
result = await asyncio.wait_for(websocket.recv(),
timeout=natpunch_timeout)
return json.loads(result)['SourceIP']
except asyncio.TimeoutError:
return None
remote_ip = asyncio.run(natpunch())
if (not remote_ip):
return None
usock = UDTSocket()
usock.UDT_MSS = 9000
usock.UDT_RENDEZVOUS = True
usock.bind(('0.0.0.0', local_port))
#print('Trying to connect to ' + remote_ip, flush=True)
usock.connect((remote_ip, remote_port))
return usock
msg_as_string = json.dumps({
"action": "pair",
"pairing_name": pairing_name
})
await websocket.send(msg_as_string)
try:
result = await asyncio.wait_for(websocket.recv(),
timeout=natpunch_timeout)
return json.loads(result)['SourceIP']
except asyncio.TimeoutError:
return None
remote_ip = asyncio.run(natpunch())
if (not remote_ip):
return None
usock = UDTSocket()
usock.UDT_MSS = 9000
usock.UDT_RENDEZVOUS = True
usock.bind(('0.0.0.0', local_port))
#print('Trying to connect to ' + remote_ip, flush=True)
usock.connect((remote_ip, remote_port))
return usock
# Some simple tests to verify package and shared library loading...
if __name__ == "__main__":
print('connect: successfully loaded all packages')
usock = UDTSocket()
usock.bind(('0.0.0.0', 10000))
print('lambda_networking.connect: verified udt4py shared lib was loaded')
class UDTSocketTest(unittest.TestCase):
def testOptions(self):
self.socket = UDTSocket()
self.assertEqual(socket.AF_INET, self.socket.family)
self.assertEqual(socket.SOCK_STREAM, self.socket.type)
self.assertTrue(self.socket.UDT_SNDSYN)
self.assertTrue(self.socket.UDT_RCVSYN)
self.assertEqual(65536, self.socket.UDP_SNDBUF)
self.assertEqual(12288000, self.socket.UDP_RCVBUF)
self.assertEqual(12058624, self.socket.UDT_SNDBUF)
self.assertEqual(12058624, self.socket.UDT_RCVBUF)
self.assertEqual(25600, self.socket.UDT_FC)
self.socket.UDP_SNDBUF = 1024001
self.assertEqual(1024001, self.socket.UDP_SNDBUF)
def testRecvSend(self):
self.socket = UDTSocket()
self.assertEqual(UDTSocket.Status.INIT, self.socket.status)
self.socket.bind("0.0.0.0:7013")
self.assertEqual(UDTSocket.Status.OPENED, self.socket.status)
self.assertEqual(("0.0.0.0", 7013), self.socket.address)
self.socket.listen()
self.assertEqual(UDTSocket.Status.LISTENING, self.socket.status)
other_thread = threading.Thread(target=self.otherConnect)
other_thread.start()
sock, _ = self.socket.accept()
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
self.assertEqual(socket.AF_INET, sock.family)
self.assertEqual(socket.SOCK_STREAM, sock.type)
self.assertEqual(("127.0.0.1", 7013), sock.address)
self.assertEqual("127.0.0.1", sock.peer_address[0][0:9])
msg = bytearray(5)
sock.recv(msg)
self.assertEqual(b"hello", msg)
msg = b"12345"
sock.recv(msg)
self.assertEqual(b"hello", msg)
buf = bytearray(6)
msg = memoryview(buf)[1:]
sock.recv(msg)
self.assertEqual(b"hello", msg)
other_thread.join()
def otherConnect(self):
sock = UDTSocket()
sock.connect("127.0.0.1:7013")
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
sock.send(b"hello")
sock.send(b"hello")
sock.send(b"hello")
def testNoBlock(self):
other_thread = threading.Thread(target=self.otherConnectNoBlock)
other_thread.start()
time.sleep(0.1)
self.socket = UDTSocket(type=socket.SOCK_DGRAM)
self.assertEqual(socket.SOCK_DGRAM, self.socket.type)
self.socket.UDT_RCVSYN = False
self.assertFalse(self.socket.UDT_RCVSYN)
self.socket.bind(("0.0.0.0", 7014))
self.socket.listen()
sock = None
while sock is None:
try:
sock, _ = self.socket.accept()
except UDTException as e:
self.assertEqual(UDTException.EASYNCRCV, e.error_code)
msg = bytearray(5)
msg[0] = 0
while msg[0] == 0:
try:
sock.recvmsg(msg)
except UDTException as e:
self.assertEqual(UDTException.EASYNCRCV, e.error_code)
self.assertEqual(b"hello", msg)
other_thread.join()
def otherConnectNoBlock(self):
sock = UDTSocket(type=socket.SOCK_DGRAM)
sock.UDT_SNDSYN = False
self.assertFalse(sock.UDT_SNDSYN)
while sock.status != UDTSocket.Status.CONNECTED:
try:
sock.connect("127.0.0.1:7014")
except UDTException as e:
self.assertEqual(UDTException.EASYNCRCV, e.error_code)
self.assertEqual(UDTSocket.Status.CONNECTED, sock.status)
sock.sendmsg(b"hello")
CONTENTS = "contents123456"
def testFiles(self):
FILE_OUT = "/tmp/udtsocket_test_out.txt"
sock1 = UDTSocket()
sock2 = UDTSocket()
sock1.bind("0.0.0.0:7015")
sock1.listen()
other_thread = threading.Thread(target=self.sendFile, args=(sock2, ))
other_thread.start()
sock, _ = sock1.accept()
sock.recvfile(FILE_OUT, 0, len(UDTSocketTest.CONTENTS))
with open(FILE_OUT, "r") as fr:
self.assertEqual(UDTSocketTest.CONTENTS, fr.read())
os.remove(FILE_OUT)
other_thread.join()
def sendFile(self, sock):
FILE_IN = "/tmp/udtsocket_test_in.txt"
with open(FILE_IN, "w") as fw:
fw.write(UDTSocketTest.CONTENTS)
sock.connect("127.0.0.1:7015")
sock.sendfile(FILE_IN)
os.remove(FILE_IN)
