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1ndahous3
db33af9c3e
* Validate socket receive sizes and bound truncated results Assisted-by: Codex:gpt-6 * Fix socket receive checks across platforms Assisted-by: Codex:gpt-6
275 lines
8.9 KiB
Python
275 lines
8.9 KiB
Python
import _socket
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import os
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import socket
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from testutils import assert_raises
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assert _socket.socket == _socket.SocketType
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MESSAGE_A = b"aaaa"
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MESSAGE_B = b"bbbbb"
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# TCP
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listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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listener.bind(("127.0.0.1", 0))
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listener.listen(1)
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connector = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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connector.connect(("127.0.0.1", listener.getsockname()[1]))
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(connection, addr) = listener.accept()
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assert addr == connector.getsockname()
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connector.send(MESSAGE_A)
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connection.send(MESSAGE_B)
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recv_a = connection.recv(len(MESSAGE_A))
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recv_b = connector.recv(len(MESSAGE_B))
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assert recv_a == MESSAGE_A
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assert recv_b == MESSAGE_B
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fd = open("README.md", "rb")
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connector.sendfile(fd)
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recv_readme = connection.recv(os.stat("README.md").st_size)
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# need this because sendfile leaves the cursor at the end of the file
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fd.seek(0)
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assert recv_readme == fd.read()
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fd.close()
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# fileno
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if os.name == "posix":
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connector_fd = connector.fileno()
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connection_fd = connection.fileno()
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os.write(connector_fd, MESSAGE_A)
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connection.send(MESSAGE_B)
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recv_a = connection.recv(len(MESSAGE_A))
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recv_b = os.read(connector_fd, (len(MESSAGE_B)))
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assert recv_a == MESSAGE_A
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assert recv_b == MESSAGE_B
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connection.close()
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connector.close()
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listener.close()
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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with assert_raises(TypeError):
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s.connect(("127.0.0.1", 8888, 8888))
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with assert_raises(OSError):
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# Lets hope nobody is listening on port 1
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s.connect(("127.0.0.1", 1))
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with assert_raises(TypeError):
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s.bind(("127.0.0.1", 8888, 8888))
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with assert_raises(OSError):
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# Lets hope nobody run this test on machine with ip 1.2.3.4
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s.bind(("1.2.3.4", 8888))
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with assert_raises(TypeError):
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s.bind((888, 8888))
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s.close()
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind(("127.0.0.1", 0))
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with assert_raises(OSError):
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s.recv(100)
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with assert_raises(OSError):
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s.send(MESSAGE_A)
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s.close()
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# UDP
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sock1 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock1.bind(("127.0.0.1", 0))
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sock2 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock2.sendto(MESSAGE_A, sock1.getsockname())
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(recv_a, addr1) = sock1.recvfrom(len(MESSAGE_A))
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assert recv_a == MESSAGE_A
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sock2.sendto(MESSAGE_B, sock1.getsockname())
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(recv_b, addr2) = sock1.recvfrom(len(MESSAGE_B))
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assert recv_b == MESSAGE_B
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assert addr1[0] == addr2[0]
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assert addr1[1] == addr2[1]
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sock2.close()
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sock3 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock3.bind(("127.0.0.1", 0))
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sock3.sendto(MESSAGE_A, sock1.getsockname())
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(recv_a, addr) = sock1.recvfrom(len(MESSAGE_A))
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assert recv_a == MESSAGE_A
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assert addr == sock3.getsockname()
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sock1.connect(("127.0.0.1", sock3.getsockname()[1]))
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sock3.connect(("127.0.0.1", sock1.getsockname()[1]))
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sock1.send(MESSAGE_A)
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sock3.send(MESSAGE_B)
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recv_a = sock3.recv(len(MESSAGE_A))
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recv_b = sock1.recv(len(MESSAGE_B))
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assert recv_a == MESSAGE_A
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assert recv_b == MESSAGE_B
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sock1.close()
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sock3.close()
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s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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with assert_raises(OSError):
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s.bind(("1.2.3.4", 888))
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s.close()
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### Errors
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with assert_raises(OSError):
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socket.socket(100, socket.SOCK_STREAM)
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with assert_raises(OSError):
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socket.socket(socket.AF_INET, 1000)
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with assert_raises(OSError):
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socket.inet_aton("test")
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# TODO: RUSTPYTHON
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# with assert_raises(ValueError):
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# socket.htonl(-1)
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assert socket.htonl(0) == 0
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assert socket.htonl(10) == 167772160
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assert socket.inet_aton("127.0.0.1") == b"\x7f\x00\x00\x01"
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assert socket.inet_aton("255.255.255.255") == b"\xff\xff\xff\xff"
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assert socket.inet_ntoa(b"\x7f\x00\x00\x01") == "127.0.0.1"
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assert socket.inet_ntoa(b"\xff\xff\xff\xff") == "255.255.255.255"
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with assert_raises(OSError):
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socket.inet_ntoa(b"\xff\xff\xff\xff\xff")
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with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
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pass
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with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as listener:
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listener.bind(("127.0.0.1", 0))
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listener.listen(1)
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connector = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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connector.connect(("127.0.0.1", listener.getsockname()[1]))
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(connection, addr) = listener.accept()
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connection.settimeout(1.0)
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with assert_raises(OSError): # TODO: check that it raises a socket.timeout
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# testing that it doesn't work with the timeout; that it stops blocking eventually
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connection.recv(len(MESSAGE_A))
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for exc, expected_name in [
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(socket.gaierror, "gaierror"),
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(socket.herror, "herror"),
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]:
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assert exc.__module__ == "socket"
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assert exc.__name__ == expected_name
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# assert socket.timeout.__module__ == "builtins"
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# assert socket.timeout.__name__ == "TimeoutError"
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# recv() sizes its buffer from the argument, so an unreachable size has to be
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# reported rather than reserved.
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sizes = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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with sizes:
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for bufsize in (2**62, 2**48):
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try:
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sizes.recv(bufsize)
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except (MemoryError, OSError, OverflowError):
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# A size that does not fit the platform's C int is reported while
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# converting the argument, before there is anything to reserve.
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pass
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with assert_raises(ValueError):
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sizes.recvfrom(-1)
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import sys
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def receive_sizes_and_truncation():
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with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as receiver:
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receiver.bind(("127.0.0.1", 0))
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receiver.settimeout(2)
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with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sender:
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for method in (receiver.recv_into, receiver.recvfrom_into):
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for size in (-1, 5):
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try:
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method(bytearray(4), size)
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except ValueError:
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pass
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else:
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raise AssertionError("invalid receive size accepted")
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sender.sendto(b"abc", receiver.getsockname())
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destination = bytearray(b"------")
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result = method(memoryview(destination)[1:5], 0)
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assert (result[0] if isinstance(result, tuple) else result) == 3
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assert destination == b"-abc--"
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if sys.platform.startswith("linux"):
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for method in (receiver.recv_into, receiver.recvfrom_into):
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sender.sendto(b"abcdefgh", receiver.getsockname())
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for flags in (socket.MSG_PEEK | socket.MSG_TRUNC, socket.MSG_TRUNC):
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destination = bytearray(b"------")
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result = method(memoryview(destination)[1:5], 3, flags)
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assert (result[0] if isinstance(result, tuple) else result) == 8
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assert destination == b"-abc--"
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for method in (receiver.recv, receiver.recvfrom, receiver.recvmsg):
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sender.sendto(b"abcdefgh", receiver.getsockname())
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result = (
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method(3, 0, socket.MSG_TRUNC)
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if method == receiver.recvmsg
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else method(3, socket.MSG_TRUNC)
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)
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data = result[0] if isinstance(result, tuple) else result
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assert data[:3] == b"abc"
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if sys.implementation.name == "rustpython":
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# Some CPython recv paths enlarge the bytes result to the
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# reported datagram length, including an unwritten tail.
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assert data == b"abc"
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def tcp_truncation_preserves_buffer(protocol=0):
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import signal
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try:
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listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM, protocol)
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except OSError:
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if protocol:
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return # MPTCP is optional in the running kernel.
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raise
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with listener:
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listener.bind(("127.0.0.1", 0))
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listener.listen()
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with socket.create_connection(listener.getsockname()) as sender:
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receiver, _ = listener.accept()
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with receiver:
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receiver.settimeout(2)
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for method in (receiver.recv_into, receiver.recvfrom_into):
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destination = bytearray(b"original")
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def send_after_mutation(signum, frame):
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destination[0] = ord("X")
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sender.sendall(b"abc")
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previous = signal.signal(signal.SIGALRM, send_after_mutation)
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try:
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signal.setitimer(signal.ITIMER_REAL, 0.05)
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result = method(destination, 0, socket.MSG_TRUNC)
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assert (result[0] if isinstance(result, tuple) else result) == 3
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assert destination == b"Xriginal"
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finally:
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signal.setitimer(signal.ITIMER_REAL, 0)
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signal.signal(signal.SIGALRM, previous)
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receive_sizes_and_truncation()
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if sys.platform.startswith("linux"):
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tcp_truncation_preserves_buffer()
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if hasattr(socket, "IPPROTO_MPTCP"):
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tcp_truncation_preserves_buffer(socket.IPPROTO_MPTCP)
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