async def main(addr):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind(addr)
while True:
data, addr = await sock.recvfrom(10000)
print('Received from', addr, data)
await sock.sendto(data, addr)
async def try_connect(sockargs, addr, errors):
sock = socket.socket(*sockargs)
try:
await sock.connect(addr)
return sock
except Exception as e:
await sock.close()
errors.append(e)
def __init__(self):
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.http_conn = h11.Connection(our_role=h11.CLIENT)
self.ws_shaker = Handshake('CLIENT')
self.ws_conn = ws.Connection('CLIENT', max_buffer=126)
self.buffer = ws.TypeFrameBuffer()
def __init__(self, address, port, handler, backlog=100):
self.address = address
self.port = port
self.handler = handler
self.backlog = backlog
self.__socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.__socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
self.handlers = []
async def main(addr):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
await sock.connect(addr)
for i in range(1000):
msg = ('Message %d' % i).encode('ascii')
print(msg)
await sock.send(msg)
resp = await sock.recv(1000)
assert msg == resp
await sock.close()
async def main(addr):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
await sock.connect(addr)
for i in range(1000):
msg = ('Message %d' % i).encode('ascii')
print(msg)
await sock.send(msg)
resp = await sock.recv(1000)
assert msg == resp
await sock.close()
def create_listening_socket(address):
"""
Create and return a listening TLS socket on a given address.
"""
sock = socket.socket()
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(address)
sock.listen()
return sock
async def sendfrom(data, from_addr):
if from_addr not in self.bind_socks:
sender = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sender.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR,
1)
sender.setsockopt(socket.SOL_IP, IP_TRANSPARENT, 1)
sender.bind(from_addr)
self.bind_socks[from_addr] = sender
sender = self.bind_socks[from_addr]
await sender.sendto(data, addr)
async def termbin(lines):
async with socket.socket() as sock:
await sock.connect(('termbin.com', 9999))
for line in lines:
assert not line.endswith('\n')
await sock.send(line.encode('utf-8') + b'\n')
url = (await sock.recv(1024)).decode('ascii').strip()
if url == 'Use netcat.':
return "Sorry, termbin hates me today :("
return url
async def _make_ssdp_request() -> Tuple[str, str]:
"""Broadcast a UDP SSDP M-SEARCH packet and return IGD location.
Returns:
URL to IGD info and IGD IP address.
"""
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
await sock.sendto(SSDP_REQUEST, ('239.255.255.250', 1900))
# TODO: add timeout
resp, addr = await sock.recvfrom(4096)
return _parse_location_from(resp.decode('ascii')), addr[0]
async def async_download(addrs):
try:
sock = curio_socket.socket()
# curio.timeout_after(sock.connect, addr)
await sock.connect(addr)
await sock.send(VERSION)
msg_bytes = await async_read_msg_bytes(sock)
await sock.close()
return msg_bytes
except Exception as e:
return None
async def spammer(address, port):
async with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
while True:
try:
await sock.sendto(b'lol' * 512, (address, port))
await curio.sleep(0)
except curio.TaskCancelled:
break
await sock.close()
async def connect_async(addr):
try:
sock = curio_socket.socket()
# curio.timeout_after(sock.connect, addr)
await sock.connect(addr)
await sock.send(VERSION)
pkt = await Packet.async_from_socket(sock)
msg = VersionMessage.from_bytes(pkt.payload)
await sock.close()
return msg
except Exception as e:
print(e)
return None
def test_send_package(self):
send_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
recv_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
recv_socket.bind(("localhost", 0))
connection = Connection(recv_socket.getsockname(), None)
assert connection.local_sequence == 0
curio.run(connection._send_next_package, send_socket)
data = curio.run(recv_socket.recv, Package._max_size)
package = Package.from_datagram(data)
assert package.header.sequence == 1 and connection.local_sequence == 1
assert package.header.ack == 0 and package.header.ack_bitfield == "0" * 32
curio.run(connection._send_next_package, send_socket)
data = curio.run(recv_socket.recv, Package._max_size)
package = Package.from_datagram(data)
assert package.header.sequence == 2 and connection.local_sequence == 2
assert package.header.ack == 0 and package.header.ack_bitfield == "0" * 32
connection.local_sequence = Sqn.get_max_sequence()
curio.run(connection._send_next_package, send_socket)
data = curio.run(recv_socket.recv, Package._max_size)
package = Package.from_datagram(data)
assert package.header.sequence == 1 and connection.local_sequence == 1
assert package.header.ack == 0 and package.header.ack_bitfield == "0" * 32
curio.run(send_socket.close)
curio.run(recv_socket.close)
def find_next_tcp_port(host='0.0.0.0', starting_port=ca.EPICS_CA2_PORT + 1):
import socket
port = starting_port
attempts = 0
while attempts < 100:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((host, port))
except IOError as ex:
port = random.randint(49152, 65535)
attempts += 1
else:
break
return port
async def cmd_associate(self):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
try:
sock.bind(('', 0))
host, port = sock.getsockname()
async with sock:
await self._stream.write(self._make_resp(host=host, port=port))
task = await spawn(self.relay_udp(sock))
while True:
data = await self._stream.read()
if not data:
await task.cancel()
return
if verbose > 0:
print('receive unexpect data:', data)
except:
sock._socket.close()
async def main():
ap = argparse.ArgumentParser()
ap.add_argument("--bind", default="127.0.0.1")
ap.add_argument("--port", type=int, default=7373)
ap.add_argument("--period", type=float, default=3)
ap.add_argument("--timeout", type=float, default=7)
ap.add_argument("--logconf", default=None)
ap.add_argument("--verbose", "--debug", "-v", action='store_true')
ap.add_argument("id", type=int)
ap.add_argument("callsign", type=str)
args = ap.parse_args()
if args.id < 0 or args.id > 7:
raise ValueError("Invalid ID (must be 0-7)")
if len(args.callsign.encode()) > 12:
raise ValueError("Callsign too long (max 16 bytes UTF-8)")
if args.period < 0.1:
raise ValueError(
"Heartbeat period too short, refusing to saturate the ether")
if args.logconf:
logging.config.fileConfig(args.logconf, disable_existing_loggers=False)
else:
formatter = logging.Formatter(
"[{name}] {asctime} {levelname}: {message}", "%Y-%m-%dT%H:%M", '{')
stderr_handler = logging.StreamHandler(sys.stderr)
stderr_handler.setFormatter(formatter)
logging.getLogger().setLevel(
logging.DEBUG if args.verbose else logging.INFO)
logging.getLogger().addHandler(stderr_handler)
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
sock.bind((args.bind, args.port))
global logger
logger = logging.getLogger("heartbeat")
timestamps = {}
async with curio.TaskGroup() as tg:
await tg.spawn(
beat(sock, args.port, args.period, args.id, args.callsign,
timestamps, args.timeout))
await tg.spawn(listen(sock, timestamps))
async def network(address, peers):
async def send(message):
await sock.sendto(message.encode(), (host, port))
for peer_addr in resolved_peers:
await sock.sendto(message.encode(), peer_addr)
async def recv():
return (await sock.recv(2048)).decode()
host, port = address
ip = await gethostbyname(host)
resolved_peers = [(await gethostbyname(peer_host), peer_port)
for peer_host, peer_port in peers]
async with socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP) as sock:
sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
sock.bind((ip, port))
yield send, recv
def create_listening_ssl_socket(address, certfile, keyfile):
"""
Create and return a listening TLS socket on a given address.
"""
ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
ssl_context.options |= (
ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1 | ssl.OP_NO_COMPRESSION
)
ssl_context.set_ciphers("ECDHE+AESGCM")
ssl_context.load_cert_chain(certfile=certfile, keyfile=keyfile)
ssl_context.set_alpn_protocols(["h2"])
sock = socket.socket()
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock = ssl_context.wrap_socket(sock)
sock.bind(address)
sock.listen()
return sock
async def udp_server(host, port, handler_task, *, family=socket.AF_INET, reuse_address=True):
sock = socket.socket(family, socket.SOCK_DGRAM)
try:
sock.bind((host, port))
if reuse_address:
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
async with sock:
while True:
data, addr = await sock.recvfrom(8192)
try:
await handler_task(data, addr)
except Exception as e:
if verbose > 0:
print(e)
if verbose > 1:
traceback.print_exc()
except Exception:
sock._socket.close()
raise
def create_listening_ssl_socket(address, certfile, keyfile):
"""
Create and return a listening TLS socket on a given address.
"""
# check if 2 files exist. If not, raise exceptions
if os.path.isfile(certfile) and os.path.isfile(keyfile):
ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
ssl_context.options |= (ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1
| ssl.OP_NO_COMPRESSION)
ssl_context.set_ciphers("ECDHE+AESGCM")
ssl_context.load_cert_chain(certfile=certfile, keyfile=keyfile)
ssl_context.set_alpn_protocols(["h2"])
sock = socket.socket()
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock = ssl_context.wrap_socket(sock)
sock.bind(address)
sock.listen()
return sock
else:
raise FileNotFoundError(
certfile + " and/or " + keyfile +
" don't exist. HTTP/2 needs certificate files.")
async def udp_server(host,
port,
handler_task,
*,
family=socket.AF_INET,
reuse_address=True):
sock = socket.socket(family, socket.SOCK_DGRAM)
try:
sock.bind((host, port))
if reuse_address:
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
async with sock:
while True:
data, addr = await sock.recvfrom(8192)
try:
await handler_task(data, addr)
except Exception as e:
if verbose > 0:
print(e)
if verbose > 1:
traceback.print_exc()
except Exception:
sock._socket.close()
raise
def __init__(self, cipher_cls, password):
self.cipher_cls = cipher_cls
self.password = password
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)