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This module provides socket operations and some related functions.
On Unix, it supports IP (Internet Protocol) and Unix domain sockets.
On other systems, it only supports IP. Functions specific for a
socket are available as methods of the socket object.
Functions:
socket() -- create a new socket object
socketpair() -- create a pair of new socket objects [*]
fromfd() -- create a socket object from an open file descriptor [*]
send_fds() -- Send file descriptor to the socket.
recv_fds() -- Recieve file descriptors from the socket.
fromshare() -- create a socket object from data received from socket.share() [*]
gethostname() -- return the current hostname
gethostbyname() -- map a hostname to its IP number
gethostbyaddr() -- map an IP number or hostname to DNS info
getservbyname() -- map a service name and a protocol name to a port number
getprotobyname() -- map a protocol name (e.g. 'tcp') to a number
ntohs(), ntohl() -- convert 16, 32 bit int from network to host byte order
htons(), htonl() -- convert 16, 32 bit int from host to network byte order
inet_aton() -- convert IP addr string (123.45.67.89) to 32-bit packed format
inet_ntoa() -- convert 32-bit packed format IP to string (123.45.67.89)
socket.getdefaulttimeout() -- get the default timeout value
socket.setdefaulttimeout() -- set the default timeout value
create_connection() -- connects to an address, with an optional timeout and
optional source address.
[*] not available on all platforms!
Special objects:
SocketType -- type object for socket objects
error -- exception raised for I/O errors
has_ipv6 -- boolean value indicating if IPv6 is supported
IntEnum constants:
AF_INET, AF_UNIX -- socket domains (first argument to socket() call)
SOCK_STREAM, SOCK_DGRAM, SOCK_RAW -- socket types (second argument)
Integer constants:
Many other constants may be defined; these may be used in calls to
the setsockopt() and getsockopt() methods.
An enumeration.
AF_ALG = <AddressFamily.AF_ALG: 38>
AF_APPLETALK = <AddressFamily.AF_APPLETALK: 5>
AF_ASH = <AddressFamily.AF_ASH: 18>
AF_ATMPVC = <AddressFamily.AF_ATMPVC: 8>
AF_ATMSVC = <AddressFamily.AF_ATMSVC: 20>
AF_AX25 = <AddressFamily.AF_AX25: 3>
AF_BRIDGE = <AddressFamily.AF_BRIDGE: 7>
AF_CAN = <AddressFamily.AF_CAN: 29>
AF_ECONET = <AddressFamily.AF_ECONET: 19>
AF_INET = <AddressFamily.AF_INET: 2>
AF_INET6 = <AddressFamily.AF_INET6: 10>
AF_IPX = <AddressFamily.AF_IPX: 4>
AF_IRDA = <AddressFamily.AF_IRDA: 23>
AF_KEY = <AddressFamily.AF_KEY: 15>
AF_LLC = <AddressFamily.AF_LLC: 26>
AF_NETBEUI = <AddressFamily.AF_NETBEUI: 13>
AF_NETLINK = <AddressFamily.AF_NETLINK: 16>
AF_NETROM = <AddressFamily.AF_NETROM: 6>
AF_PACKET = <AddressFamily.AF_PACKET: 17>
AF_PPPOX = <AddressFamily.AF_PPPOX: 24>
AF_QIPCRTR = <AddressFamily.AF_QIPCRTR: 42>
AF_RDS = <AddressFamily.AF_RDS: 21>
AF_ROSE = <AddressFamily.AF_ROSE: 11>
AF_SECURITY = <AddressFamily.AF_SECURITY: 14>
AF_SNA = <AddressFamily.AF_SNA: 22>
AF_TIPC = <AddressFamily.AF_TIPC: 30>
AF_UNIX = <AddressFamily.AF_UNIX: 1>
AF_UNSPEC = <AddressFamily.AF_UNSPEC: 0>
AF_VSOCK = <AddressFamily.AF_VSOCK: 40>
AF_WANPIPE = <AddressFamily.AF_WANPIPE: 25>
AF_X25 = <AddressFamily.AF_X25: 9>
An enumeration.
AI_ADDRCONFIG = <AddressInfo.AI_ADDRCONFIG: 32>
AI_ALL = <AddressInfo.AI_ALL: 16>
AI_CANONNAME = <AddressInfo.AI_CANONNAME: 2>
AI_NUMERICHOST = <AddressInfo.AI_NUMERICHOST: 4>
AI_NUMERICSERV = <AddressInfo.AI_NUMERICSERV: 1024>
AI_PASSIVE = <AddressInfo.AI_PASSIVE: 1>
AI_V4MAPPED = <AddressInfo.AI_V4MAPPED: 8>
Enum where members are also (and must be) ints
name = <types.DynamicClassAttribute object at 0x7f75e3bec2e0> The name of the Enum member.
value = <types.DynamicClassAttribute object at 0x7f75e3bec2b0> The value of the Enum member.
Support for integer-based Flags
An enumeration.
MSG_CMSG_CLOEXEC = <MsgFlag.MSG_CMSG_CLOEXEC: 1073741824>
MSG_CONFIRM = <MsgFlag.MSG_CONFIRM: 2048>
MSG_CTRUNC = <MsgFlag.MSG_CTRUNC: 8>
MSG_DONTROUTE = <MsgFlag.MSG_DONTROUTE: 4>
MSG_DONTWAIT = <MsgFlag.MSG_DONTWAIT: 64>
MSG_EOR = <MsgFlag.MSG_EOR: 128>
MSG_ERRQUEUE = <MsgFlag.MSG_ERRQUEUE: 8192>
MSG_FASTOPEN = <MsgFlag.MSG_FASTOPEN: 536870912>
MSG_MORE = <MsgFlag.MSG_MORE: 32768>
MSG_NOSIGNAL = <MsgFlag.MSG_NOSIGNAL: 16384>
MSG_OOB = <MsgFlag.MSG_OOB: 1>
MSG_PEEK = <MsgFlag.MSG_PEEK: 2>
MSG_TRUNC = <MsgFlag.MSG_TRUNC: 32>
MSG_WAITALL = <MsgFlag.MSG_WAITALL: 256>
Raw I/O implementation for stream sockets.
This class supports the makefile() method on sockets. It provides
the raw I/O interface on top of a socket object.
close(self)
Close the SocketIO object. This doesn't close the underlying
socket, except if all references to it have disappeared.
fileno(self)
Return the file descriptor of the underlying socket.
flush(self, /) Flush write buffers, if applicable. This is not implemented for read-only and non-blocking streams.
isatty(self, /) Return whether this is an 'interactive' stream. Return False if it can't be determined.
read(self, size=-1, /)
readable(self)
True if the SocketIO is open for reading.
readall(self, /) Read until EOF, using multiple read() call.
readinto(self, b)
Read up to len(b) bytes into the writable buffer *b* and return
the number of bytes read. If the socket is non-blocking and no bytes
are available, None is returned.
If *b* is non-empty, a 0 return value indicates that the connection
was shutdown at the other end.
readline(self, size=-1, /) Read and return a line from the stream. If size is specified, at most size bytes will be read. The line terminator is always b'\n' for binary files; for text files, the newlines argument to open can be used to select the line terminator(s) recognized.
readlines(self, hint=-1, /) Return a list of lines from the stream. hint can be specified to control the number of lines read: no more lines will be read if the total size (in bytes/characters) of all lines so far exceeds hint.
seek(...) Change stream position. Change the stream position to the given byte offset. The offset is interpreted relative to the position indicated by whence. Values for whence are: * 0 -- start of stream (the default); offset should be zero or positive * 1 -- current stream position; offset may be negative * 2 -- end of stream; offset is usually negative Return the new absolute position.
seekable(self)
True if the SocketIO is open for seeking.
tell(self, /) Return current stream position.
truncate(...) Truncate file to size bytes. File pointer is left unchanged. Size defaults to the current IO position as reported by tell(). Returns the new size.
writable(self)
True if the SocketIO is open for writing.
write(self, b)
Write the given bytes or bytearray object *b* to the socket
and return the number of bytes written. This can be less than
len(b) if not all data could be written. If the socket is
non-blocking and no bytes could be written None is returned.
writelines(self, lines, /) Write a list of lines to stream. Line separators are not added, so it is usual for each of the lines provided to have a line separator at the end.
closed = <attribute 'closed' of '_io._IOBase' objects>
mode = <property object at 0x7f75e3a708b0>
name = <property object at 0x7f75e3a70860>
An enumeration.
SOCK_CLOEXEC = <SocketKind.SOCK_CLOEXEC: 524288>
SOCK_DGRAM = <SocketKind.SOCK_DGRAM: 2>
SOCK_NONBLOCK = <SocketKind.SOCK_NONBLOCK: 2048>
SOCK_RAW = <SocketKind.SOCK_RAW: 3>
SOCK_RDM = <SocketKind.SOCK_RDM: 4>
SOCK_SEQPACKET = <SocketKind.SOCK_SEQPACKET: 5>
SOCK_STREAM = <SocketKind.SOCK_STREAM: 1>
socket(family=AF_INET, type=SOCK_STREAM, proto=0) -> socket object socket(family=-1, type=-1, proto=-1, fileno=None) -> socket object Open a socket of the given type. The family argument specifies the address family; it defaults to AF_INET. The type argument specifies whether this is a stream (SOCK_STREAM, this is the default) or datagram (SOCK_DGRAM) socket. The protocol argument defaults to 0, specifying the default protocol. Keyword arguments are accepted. The socket is created as non-inheritable. When a fileno is passed in, family, type and proto are auto-detected, unless they are explicitly set. A socket object represents one endpoint of a network connection. Methods of socket objects (keyword arguments not allowed): _accept() -- accept connection, returning new socket fd and client address bind(addr) -- bind the socket to a local address close() -- close the socket connect(addr) -- connect the socket to a remote address connect_ex(addr) -- connect, return an error code instead of an exception dup() -- return a new socket fd duplicated from fileno() fileno() -- return underlying file descriptor getpeername() -- return remote address [*] getsockname() -- return local address getsockopt(level, optname[, buflen]) -- get socket options gettimeout() -- return timeout or None listen([n]) -- start listening for incoming connections recv(buflen[, flags]) -- receive data recv_into(buffer[, nbytes[, flags]]) -- receive data (into a buffer) recvfrom(buflen[, flags]) -- receive data and sender's address recvfrom_into(buffer[, nbytes, [, flags]) -- receive data and sender's address (into a buffer) sendall(data[, flags]) -- send all data send(data[, flags]) -- send data, may not send all of it sendto(data[, flags], addr) -- send data to a given address setblocking(bool) -- set or clear the blocking I/O flag getblocking() -- return True if socket is blocking, False if non-blocking setsockopt(level, optname, value[, optlen]) -- set socket options settimeout(None | float) -- set or clear the timeout shutdown(how) -- shut down traffic in one or both directions [*] not available on all platforms!
bind(...) bind(address) Bind the socket to a local address. For IP sockets, the address is a pair (host, port); the host must refer to the local host. For raw packet sockets the address is a tuple (ifname, proto [,pkttype [,hatype [,addr]]])
close(...) close() Close the socket. It cannot be used after this call.
connect(...) connect(address) Connect the socket to a remote address. For IP sockets, the address is a pair (host, port).
connect_ex(...) connect_ex(address) -> errno This is like connect(address), but returns an error code (the errno value) instead of raising an exception when an error occurs.
detach(...) detach() Close the socket object without closing the underlying file descriptor. The object cannot be used after this call, but the file descriptor can be reused for other purposes. The file descriptor is returned.
fileno(...) fileno() -> integer Return the integer file descriptor of the socket.
getblocking(...) getblocking() Returns True if socket is in blocking mode, or False if it is in non-blocking mode.
getpeername(...) getpeername() -> address info Return the address of the remote endpoint. For IP sockets, the address info is a pair (hostaddr, port).
getsockname(...) getsockname() -> address info Return the address of the local endpoint. The format depends on the address family. For IPv4 sockets, the address info is a pair (hostaddr, port).
getsockopt(...) getsockopt(level, option[, buffersize]) -> value Get a socket option. See the Unix manual for level and option. If a nonzero buffersize argument is given, the return value is a string of that length; otherwise it is an integer.
gettimeout(...) gettimeout() -> timeout Returns the timeout in seconds (float) associated with socket operations. A timeout of None indicates that timeouts on socket operations are disabled.
listen(...) listen([backlog]) Enable a server to accept connections. If backlog is specified, it must be at least 0 (if it is lower, it is set to 0); it specifies the number of unaccepted connections that the system will allow before refusing new connections. If not specified, a default reasonable value is chosen.
recv(...) recv(buffersize[, flags]) -> data Receive up to buffersize bytes from the socket. For the optional flags argument, see the Unix manual. When no data is available, block until at least one byte is available or until the remote end is closed. When the remote end is closed and all data is read, return the empty string.
recv_into(...) recv_into(buffer, [nbytes[, flags]]) -> nbytes_read A version of recv() that stores its data into a buffer rather than creating a new string. Receive up to buffersize bytes from the socket. If buffersize is not specified (or 0), receive up to the size available in the given buffer. See recv() for documentation about the flags.
recvfrom(...) recvfrom(buffersize[, flags]) -> (data, address info) Like recv(buffersize, flags) but also return the sender's address info.
recvfrom_into(...) recvfrom_into(buffer[, nbytes[, flags]]) -> (nbytes, address info) Like recv_into(buffer[, nbytes[, flags]]) but also return the sender's address info.
recvmsg(...) recvmsg(bufsize[, ancbufsize[, flags]]) -> (data, ancdata, msg_flags, address) Receive normal data (up to bufsize bytes) and ancillary data from the socket. The ancbufsize argument sets the size in bytes of the internal buffer used to receive the ancillary data; it defaults to 0, meaning that no ancillary data will be received. Appropriate buffer sizes for ancillary data can be calculated using CMSG_SPACE() or CMSG_LEN(), and items which do not fit into the buffer might be truncated or discarded. The flags argument defaults to 0 and has the same meaning as for recv(). The return value is a 4-tuple: (data, ancdata, msg_flags, address). The data item is a bytes object holding the non-ancillary data received. The ancdata item is a list of zero or more tuples (cmsg_level, cmsg_type, cmsg_data) representing the ancillary data (control messages) received: cmsg_level and cmsg_type are integers specifying the protocol level and protocol-specific type respectively, and cmsg_data is a bytes object holding the associated data. The msg_flags item is the bitwise OR of various flags indicating conditions on the received message; see your system documentation for details. If the receiving socket is unconnected, address is the address of the sending socket, if available; otherwise, its value is unspecified. If recvmsg() raises an exception after the system call returns, it will first attempt to close any file descriptors received via the SCM_RIGHTS mechanism.
recvmsg_into(...) recvmsg_into(buffers[, ancbufsize[, flags]]) -> (nbytes, ancdata, msg_flags, address) Receive normal data and ancillary data from the socket, scattering the non-ancillary data into a series of buffers. The buffers argument must be an iterable of objects that export writable buffers (e.g. bytearray objects); these will be filled with successive chunks of the non-ancillary data until it has all been written or there are no more buffers. The ancbufsize argument sets the size in bytes of the internal buffer used to receive the ancillary data; it defaults to 0, meaning that no ancillary data will be received. Appropriate buffer sizes for ancillary data can be calculated using CMSG_SPACE() or CMSG_LEN(), and items which do not fit into the buffer might be truncated or discarded. The flags argument defaults to 0 and has the same meaning as for recv(). The return value is a 4-tuple: (nbytes, ancdata, msg_flags, address). The nbytes item is the total number of bytes of non-ancillary data written into the buffers. The ancdata item is a list of zero or more tuples (cmsg_level, cmsg_type, cmsg_data) representing the ancillary data (control messages) received: cmsg_level and cmsg_type are integers specifying the protocol level and protocol-specific type respectively, and cmsg_data is a bytes object holding the associated data. The msg_flags item is the bitwise OR of various flags indicating conditions on the received message; see your system documentation for details. If the receiving socket is unconnected, address is the address of the sending socket, if available; otherwise, its value is unspecified. If recvmsg_into() raises an exception after the system call returns, it will first attempt to close any file descriptors received via the SCM_RIGHTS mechanism.
send(...) send(data[, flags]) -> count Send a data string to the socket. For the optional flags argument, see the Unix manual. Return the number of bytes sent; this may be less than len(data) if the network is busy.
sendall(...) sendall(data[, flags]) Send a data string to the socket. For the optional flags argument, see the Unix manual. This calls send() repeatedly until all data is sent. If an error occurs, it's impossible to tell how much data has been sent.
sendmsg(...) sendmsg(buffers[, ancdata[, flags[, address]]]) -> count Send normal and ancillary data to the socket, gathering the non-ancillary data from a series of buffers and concatenating it into a single message. The buffers argument specifies the non-ancillary data as an iterable of bytes-like objects (e.g. bytes objects). The ancdata argument specifies the ancillary data (control messages) as an iterable of zero or more tuples (cmsg_level, cmsg_type, cmsg_data), where cmsg_level and cmsg_type are integers specifying the protocol level and protocol-specific type respectively, and cmsg_data is a bytes-like object holding the associated data. The flags argument defaults to 0 and has the same meaning as for send(). If address is supplied and not None, it sets a destination address for the message. The return value is the number of bytes of non-ancillary data sent.
sendmsg_afalg(...) sendmsg_afalg([msg], *, op[, iv[, assoclen[, flags=MSG_MORE]]]) Set operation mode, IV and length of associated data for an AF_ALG operation socket.
sendto(...) sendto(data[, flags], address) -> count Like send(data, flags) but allows specifying the destination address. For IP sockets, the address is a pair (hostaddr, port).
setblocking(...) setblocking(flag) Set the socket to blocking (flag is true) or non-blocking (false). setblocking(True) is equivalent to settimeout(None); setblocking(False) is equivalent to settimeout(0.0).
setsockopt(...) setsockopt(level, option, value: int) setsockopt(level, option, value: buffer) setsockopt(level, option, None, optlen: int) Set a socket option. See the Unix manual for level and option. The value argument can either be an integer, a string buffer, or None, optlen.
settimeout(...) settimeout(timeout) Set a timeout on socket operations. 'timeout' can be a float, giving in seconds, or None. Setting a timeout of None disables the timeout feature and is equivalent to setblocking(1). Setting a timeout of zero is the same as setblocking(0).
shutdown(...) shutdown(flag) Shut down the reading side of the socket (flag == SHUT_RD), the writing side of the socket (flag == SHUT_WR), or both ends (flag == SHUT_RDWR).
family = <member 'family' of '_socket.socket' objects> the socket family
proto = <member 'proto' of '_socket.socket' objects> the socket protocol
timeout = <attribute 'timeout' of '_socket.socket' objects> the socket timeout
type = <member 'type' of '_socket.socket' objects> the socket type
Base class for I/O related errors.
with_traceback(...)
Exception.with_traceback(tb) --
set self.__traceback__ to tb and return self.
args = <attribute 'args' of 'BaseException' objects>
characters_written = <attribute 'characters_written' of 'OSError' objects>
errno = <member 'errno' of 'OSError' objects> POSIX exception code
filename = <member 'filename' of 'OSError' objects> exception filename
filename2 = <member 'filename2' of 'OSError' objects> second exception filename
strerror = <member 'strerror' of 'OSError' objects> exception strerror
with_traceback(...)
Exception.with_traceback(tb) --
set self.__traceback__ to tb and return self.
args = <attribute 'args' of 'BaseException' objects>
characters_written = <attribute 'characters_written' of 'OSError' objects>
errno = <member 'errno' of 'OSError' objects> POSIX exception code
filename = <member 'filename' of 'OSError' objects> exception filename
filename2 = <member 'filename2' of 'OSError' objects> second exception filename
strerror = <member 'strerror' of 'OSError' objects> exception strerror
with_traceback(...)
Exception.with_traceback(tb) --
set self.__traceback__ to tb and return self.
args = <attribute 'args' of 'BaseException' objects>
characters_written = <attribute 'characters_written' of 'OSError' objects>
errno = <member 'errno' of 'OSError' objects> POSIX exception code
filename = <member 'filename' of 'OSError' objects> exception filename
filename2 = <member 'filename2' of 'OSError' objects> second exception filename
strerror = <member 'strerror' of 'OSError' objects> exception strerror
A subclass of _socket.socket adding the makefile() method.
accept(self)
accept() -> (socket object, address info)
Wait for an incoming connection. Return a new socket
representing the connection, and the address of the client.
For IP sockets, the address info is a pair (hostaddr, port).
bind(...) bind(address) Bind the socket to a local address. For IP sockets, the address is a pair (host, port); the host must refer to the local host. For raw packet sockets the address is a tuple (ifname, proto [,pkttype [,hatype [,addr]]])
close(self)
connect(...) connect(address) Connect the socket to a remote address. For IP sockets, the address is a pair (host, port).
connect_ex(...) connect_ex(address) -> errno This is like connect(address), but returns an error code (the errno value) instead of raising an exception when an error occurs.
detach(self)
detach() -> file descriptor
Close the socket object without closing the underlying file descriptor.
The object cannot be used after this call, but the file descriptor
can be reused for other purposes. The file descriptor is returned.
dup(self)
dup() -> socket object
Duplicate the socket. Return a new socket object connected to the same
system resource. The new socket is non-inheritable.
fileno(...) fileno() -> integer Return the integer file descriptor of the socket.
get_inheritable(self) Get the inheritable flag of the socket
getblocking(...) getblocking() Returns True if socket is in blocking mode, or False if it is in non-blocking mode.
getpeername(...) getpeername() -> address info Return the address of the remote endpoint. For IP sockets, the address info is a pair (hostaddr, port).
getsockname(...) getsockname() -> address info Return the address of the local endpoint. The format depends on the address family. For IPv4 sockets, the address info is a pair (hostaddr, port).
getsockopt(...) getsockopt(level, option[, buffersize]) -> value Get a socket option. See the Unix manual for level and option. If a nonzero buffersize argument is given, the return value is a string of that length; otherwise it is an integer.
gettimeout(...) gettimeout() -> timeout Returns the timeout in seconds (float) associated with socket operations. A timeout of None indicates that timeouts on socket operations are disabled.
listen(...) listen([backlog]) Enable a server to accept connections. If backlog is specified, it must be at least 0 (if it is lower, it is set to 0); it specifies the number of unaccepted connections that the system will allow before refusing new connections. If not specified, a default reasonable value is chosen.
makefile(self, mode='r', buffering=None, *, encoding=None, errors=None, newline=None)
makefile(...) -> an I/O stream connected to the socket
The arguments are as for io.open() after the filename, except the only
supported mode values are 'r' (default), 'w' and 'b'.
recv(...) recv(buffersize[, flags]) -> data Receive up to buffersize bytes from the socket. For the optional flags argument, see the Unix manual. When no data is available, block until at least one byte is available or until the remote end is closed. When the remote end is closed and all data is read, return the empty string.
recv_into(...) recv_into(buffer, [nbytes[, flags]]) -> nbytes_read A version of recv() that stores its data into a buffer rather than creating a new string. Receive up to buffersize bytes from the socket. If buffersize is not specified (or 0), receive up to the size available in the given buffer. See recv() for documentation about the flags.
recvfrom(...) recvfrom(buffersize[, flags]) -> (data, address info) Like recv(buffersize, flags) but also return the sender's address info.
recvfrom_into(...) recvfrom_into(buffer[, nbytes[, flags]]) -> (nbytes, address info) Like recv_into(buffer[, nbytes[, flags]]) but also return the sender's address info.
recvmsg(...) recvmsg(bufsize[, ancbufsize[, flags]]) -> (data, ancdata, msg_flags, address) Receive normal data (up to bufsize bytes) and ancillary data from the socket. The ancbufsize argument sets the size in bytes of the internal buffer used to receive the ancillary data; it defaults to 0, meaning that no ancillary data will be received. Appropriate buffer sizes for ancillary data can be calculated using CMSG_SPACE() or CMSG_LEN(), and items which do not fit into the buffer might be truncated or discarded. The flags argument defaults to 0 and has the same meaning as for recv(). The return value is a 4-tuple: (data, ancdata, msg_flags, address). The data item is a bytes object holding the non-ancillary data received. The ancdata item is a list of zero or more tuples (cmsg_level, cmsg_type, cmsg_data) representing the ancillary data (control messages) received: cmsg_level and cmsg_type are integers specifying the protocol level and protocol-specific type respectively, and cmsg_data is a bytes object holding the associated data. The msg_flags item is the bitwise OR of various flags indicating conditions on the received message; see your system documentation for details. If the receiving socket is unconnected, address is the address of the sending socket, if available; otherwise, its value is unspecified. If recvmsg() raises an exception after the system call returns, it will first attempt to close any file descriptors received via the SCM_RIGHTS mechanism.
recvmsg_into(...) recvmsg_into(buffers[, ancbufsize[, flags]]) -> (nbytes, ancdata, msg_flags, address) Receive normal data and ancillary data from the socket, scattering the non-ancillary data into a series of buffers. The buffers argument must be an iterable of objects that export writable buffers (e.g. bytearray objects); these will be filled with successive chunks of the non-ancillary data until it has all been written or there are no more buffers. The ancbufsize argument sets the size in bytes of the internal buffer used to receive the ancillary data; it defaults to 0, meaning that no ancillary data will be received. Appropriate buffer sizes for ancillary data can be calculated using CMSG_SPACE() or CMSG_LEN(), and items which do not fit into the buffer might be truncated or discarded. The flags argument defaults to 0 and has the same meaning as for recv(). The return value is a 4-tuple: (nbytes, ancdata, msg_flags, address). The nbytes item is the total number of bytes of non-ancillary data written into the buffers. The ancdata item is a list of zero or more tuples (cmsg_level, cmsg_type, cmsg_data) representing the ancillary data (control messages) received: cmsg_level and cmsg_type are integers specifying the protocol level and protocol-specific type respectively, and cmsg_data is a bytes object holding the associated data. The msg_flags item is the bitwise OR of various flags indicating conditions on the received message; see your system documentation for details. If the receiving socket is unconnected, address is the address of the sending socket, if available; otherwise, its value is unspecified. If recvmsg_into() raises an exception after the system call returns, it will first attempt to close any file descriptors received via the SCM_RIGHTS mechanism.
send(...) send(data[, flags]) -> count Send a data string to the socket. For the optional flags argument, see the Unix manual. Return the number of bytes sent; this may be less than len(data) if the network is busy.
sendall(...) sendall(data[, flags]) Send a data string to the socket. For the optional flags argument, see the Unix manual. This calls send() repeatedly until all data is sent. If an error occurs, it's impossible to tell how much data has been sent.
sendfile(self, file, offset=0, count=None)
sendfile(file[, offset[, count]]) -> sent
Send a file until EOF is reached by using high-performance
os.sendfile() and return the total number of bytes which
were sent.
*file* must be a regular file object opened in binary mode.
If os.sendfile() is not available (e.g. Windows) or file is
not a regular file socket.send() will be used instead.
*offset* tells from where to start reading the file.
If specified, *count* is the total number of bytes to transmit
as opposed to sending the file until EOF is reached.
File position is updated on return or also in case of error in
which case file.tell() can be used to figure out the number of
bytes which were sent.
The socket must be of SOCK_STREAM type.
Non-blocking sockets are not supported.
sendmsg(...) sendmsg(buffers[, ancdata[, flags[, address]]]) -> count Send normal and ancillary data to the socket, gathering the non-ancillary data from a series of buffers and concatenating it into a single message. The buffers argument specifies the non-ancillary data as an iterable of bytes-like objects (e.g. bytes objects). The ancdata argument specifies the ancillary data (control messages) as an iterable of zero or more tuples (cmsg_level, cmsg_type, cmsg_data), where cmsg_level and cmsg_type are integers specifying the protocol level and protocol-specific type respectively, and cmsg_data is a bytes-like object holding the associated data. The flags argument defaults to 0 and has the same meaning as for send(). If address is supplied and not None, it sets a destination address for the message. The return value is the number of bytes of non-ancillary data sent.
sendmsg_afalg(...) sendmsg_afalg([msg], *, op[, iv[, assoclen[, flags=MSG_MORE]]]) Set operation mode, IV and length of associated data for an AF_ALG operation socket.
sendto(...) sendto(data[, flags], address) -> count Like send(data, flags) but allows specifying the destination address. For IP sockets, the address is a pair (hostaddr, port).
set_inheritable(self, inheritable) Set the inheritable flag of the socket
setblocking(...) setblocking(flag) Set the socket to blocking (flag is true) or non-blocking (false). setblocking(True) is equivalent to settimeout(None); setblocking(False) is equivalent to settimeout(0.0).
setsockopt(...) setsockopt(level, option, value: int) setsockopt(level, option, value: buffer) setsockopt(level, option, None, optlen: int) Set a socket option. See the Unix manual for level and option. The value argument can either be an integer, a string buffer, or None, optlen.
settimeout(...) settimeout(timeout) Set a timeout on socket operations. 'timeout' can be a float, giving in seconds, or None. Setting a timeout of None disables the timeout feature and is equivalent to setblocking(1). Setting a timeout of zero is the same as setblocking(0).
shutdown(...) shutdown(flag) Shut down the reading side of the socket (flag == SHUT_RD), the writing side of the socket (flag == SHUT_WR), or both ends (flag == SHUT_RDWR).
family = <property object at 0x7f75e3b37420>
Read-only access to the address family for this socket.
proto = <member 'proto' of '_socket.socket' objects> the socket protocol
timeout = <attribute 'timeout' of '_socket.socket' objects> the socket timeout
type = <property object at 0x7f75e3a66e80>
Read-only access to the socket type.
Timeout expired.
with_traceback(...)
Exception.with_traceback(tb) --
set self.__traceback__ to tb and return self.
args = <attribute 'args' of 'BaseException' objects>
characters_written = <attribute 'characters_written' of 'OSError' objects>
errno = <member 'errno' of 'OSError' objects> POSIX exception code
filename = <member 'filename' of 'OSError' objects> exception filename
filename2 = <member 'filename2' of 'OSError' objects> second exception filename
strerror = <member 'strerror' of 'OSError' objects> exception strerror
CMSG_LEN(...) CMSG_LEN(length) -> control message length Return the total length, without trailing padding, of an ancillary data item with associated data of the given length. This value can often be used as the buffer size for recvmsg() to receive a single item of ancillary data, but RFC 3542 requires portable applications to use CMSG_SPACE() and thus include space for padding, even when the item will be the last in the buffer. Raises OverflowError if length is outside the permissible range of values.
CMSG_SPACE(...) CMSG_SPACE(length) -> buffer size Return the buffer size needed for recvmsg() to receive an ancillary data item with associated data of the given length, along with any trailing padding. The buffer space needed to receive multiple items is the sum of the CMSG_SPACE() values for their associated data lengths. Raises OverflowError if length is outside the permissible range of values.
close(...) close(integer) -> None Close an integer socket file descriptor. This is like os.close(), but for sockets; on some platforms os.close() won't work for socket file descriptors.
create_connection(address, timeout=<object object at 0x7f75e3c944e0>, source_address=None)
Connect to *address* and return the socket object.
Convenience function. Connect to *address* (a 2-tuple ``(host,
port)``) and return the socket object. Passing the optional
*timeout* parameter will set the timeout on the socket instance
before attempting to connect. If no *timeout* is supplied, the
global default timeout setting returned by :func:`getdefaulttimeout`
is used. If *source_address* is set it must be a tuple of (host, port)
for the socket to bind as a source address before making the connection.
A host of '' or port 0 tells the OS to use the default.
create_server(address, *, family=<AddressFamily.AF_INET: 2>, backlog=None, reuse_port=False, dualstack_ipv6=False)
Convenience function which creates a SOCK_STREAM type socket
bound to *address* (a 2-tuple (host, port)) and return the socket
object.
*family* should be either AF_INET or AF_INET6.
*backlog* is the queue size passed to socket.listen().
*reuse_port* dictates whether to use the SO_REUSEPORT socket option.
*dualstack_ipv6*: if true and the platform supports it, it will
create an AF_INET6 socket able to accept both IPv4 or IPv6
connections. When false it will explicitly disable this option on
platforms that enable it by default (e.g. Linux).
>>> with create_server(('', 8000)) as server:
... while True:
... conn, addr = server.accept()
... # handle new connection
dup(...) dup(integer) -> integer Duplicate an integer socket file descriptor. This is like os.dup(), but for sockets; on some platforms os.dup() won't work for socket file descriptors.
fromfd(fd, family, type, proto=0)
fromfd(fd, family, type[, proto]) -> socket object
Create a socket object from a duplicate of the given file
descriptor. The remaining arguments are the same as for socket().
getaddrinfo(host, port, family=0, type=0, proto=0, flags=0)
Resolve host and port into list of address info entries.
Translate the host/port argument into a sequence of 5-tuples that contain
all the necessary arguments for creating a socket connected to that service.
host is a domain name, a string representation of an IPv4/v6 address or
None. port is a string service name such as 'http', a numeric port number or
None. By passing None as the value of host and port, you can pass NULL to
the underlying C API.
The family, type and proto arguments can be optionally specified in order to
narrow the list of addresses returned. Passing zero as a value for each of
these arguments selects the full range of results.
getdefaulttimeout(...) getdefaulttimeout() -> timeout Returns the default timeout in seconds (float) for new socket objects. A value of None indicates that new socket objects have no timeout. When the socket module is first imported, the default is None.
getfqdn(name='')
Get fully qualified domain name from name.
An empty argument is interpreted as meaning the local host.
First the hostname returned by gethostbyaddr() is checked, then
possibly existing aliases. In case no FQDN is available and `name`
was given, it is returned unchanged. If `name` was empty or '0.0.0.0',
hostname from gethostname() is returned.
gethostbyaddr(...) gethostbyaddr(host) -> (name, aliaslist, addresslist) Return the true host name, a list of aliases, and a list of IP addresses, for a host. The host argument is a string giving a host name or IP number.
gethostbyname(...) gethostbyname(host) -> address Return the IP address (a string of the form '255.255.255.255') for a host.
gethostbyname_ex(...) gethostbyname_ex(host) -> (name, aliaslist, addresslist) Return the true host name, a list of aliases, and a list of IP addresses, for a host. The host argument is a string giving a host name or IP number.
gethostname(...) gethostname() -> string Return the current host name.
getnameinfo(...) getnameinfo(sockaddr, flags) --> (host, port) Get host and port for a sockaddr.
getprotobyname(...) getprotobyname(name) -> integer Return the protocol number for the named protocol. (Rarely used.)
getservbyname(...) getservbyname(servicename[, protocolname]) -> integer Return a port number from a service name and protocol name. The optional protocol name, if given, should be 'tcp' or 'udp', otherwise any protocol will match.
getservbyport(...) getservbyport(port[, protocolname]) -> string Return the service name from a port number and protocol name. The optional protocol name, if given, should be 'tcp' or 'udp', otherwise any protocol will match.
has_dualstack_ipv6()
Return True if the platform supports creating a SOCK_STREAM socket
which can handle both AF_INET and AF_INET6 (IPv4 / IPv6) connections.
htonl(...) htonl(integer) -> integer Convert a 32-bit integer from host to network byte order.
htons(...) htons(integer) -> integer Convert a 16-bit unsigned integer from host to network byte order.
if_indextoname(...) if_indextoname(if_index) Returns the interface name corresponding to the interface index if_index.
if_nameindex(...) if_nameindex() Returns a list of network interface information (index, name) tuples.
if_nametoindex(...) if_nametoindex(if_name) Returns the interface index corresponding to the interface name if_name.
inet_aton(...) inet_aton(string) -> bytes giving packed 32-bit IP representation Convert an IP address in string format (123.45.67.89) to the 32-bit packed binary format used in low-level network functions.
inet_ntoa(...) inet_ntoa(packed_ip) -> ip_address_string Convert an IP address from 32-bit packed binary format to string format
inet_ntop(...) inet_ntop(af, packed_ip) -> string formatted IP address Convert a packed IP address of the given family to string format.
inet_pton(...) inet_pton(af, ip) -> packed IP address string Convert an IP address from string format to a packed string suitable for use with low-level network functions.
ntohl(...) ntohl(integer) -> integer Convert a 32-bit integer from network to host byte order.
ntohs(...) ntohs(integer) -> integer Convert a 16-bit unsigned integer from network to host byte order.
recv_fds(sock, bufsize, maxfds, flags=0)
recv_fds(sock, bufsize, maxfds[, flags]) -> (data, list of file
descriptors, msg_flags, address)
Receive up to maxfds file descriptors returning the message
data and a list containing the descriptors.
send_fds(sock, buffers, fds, flags=0, address=None)
send_fds(sock, buffers, fds[, flags[, address]]) -> integer
Send the list of file descriptors fds over an AF_UNIX socket.
setdefaulttimeout(...) setdefaulttimeout(timeout) Set the default timeout in seconds (float) for new socket objects. A value of None indicates that new socket objects have no timeout. When the socket module is first imported, the default is None.
sethostname(...) sethostname(name) Sets the hostname to name.
socketpair(family=None, type=<SocketKind.SOCK_STREAM: 1>, proto=0) socketpair([family[, type[, proto]]]) -> (socket object, socket object) Create a pair of socket objects from the sockets returned by the platform socketpair() function. The arguments are the same as for socket() except the default family is AF_UNIX if defined on the platform; otherwise, the default is AF_INET.
AF_ALG = <AddressFamily.AF_ALG: 38>
AF_APPLETALK = <AddressFamily.AF_APPLETALK: 5>
AF_ASH = <AddressFamily.AF_ASH: 18>
AF_ATMPVC = <AddressFamily.AF_ATMPVC: 8>
AF_ATMSVC = <AddressFamily.AF_ATMSVC: 20>
AF_AX25 = <AddressFamily.AF_AX25: 3>
AF_BRIDGE = <AddressFamily.AF_BRIDGE: 7>
AF_CAN = <AddressFamily.AF_CAN: 29>
AF_DECnet = 12
AF_ECONET = <AddressFamily.AF_ECONET: 19>
AF_INET = <AddressFamily.AF_INET: 2>
AF_INET6 = <AddressFamily.AF_INET6: 10>
AF_IPX = <AddressFamily.AF_IPX: 4>
AF_IRDA = <AddressFamily.AF_IRDA: 23>
AF_KEY = <AddressFamily.AF_KEY: 15>
AF_LLC = <AddressFamily.AF_LLC: 26>
AF_NETBEUI = <AddressFamily.AF_NETBEUI: 13>
AF_NETLINK = <AddressFamily.AF_NETLINK: 16>
AF_NETROM = <AddressFamily.AF_NETROM: 6>
AF_PACKET = <AddressFamily.AF_PACKET: 17>
AF_PPPOX = <AddressFamily.AF_PPPOX: 24>
AF_QIPCRTR = <AddressFamily.AF_QIPCRTR: 42>
AF_RDS = <AddressFamily.AF_RDS: 21>
AF_ROSE = <AddressFamily.AF_ROSE: 11>
AF_ROUTE = <AddressFamily.AF_NETLINK: 16>
AF_SECURITY = <AddressFamily.AF_SECURITY: 14>
AF_SNA = <AddressFamily.AF_SNA: 22>
AF_TIPC = <AddressFamily.AF_TIPC: 30>
AF_UNIX = <AddressFamily.AF_UNIX: 1>
AF_UNSPEC = <AddressFamily.AF_UNSPEC: 0>
AF_VSOCK = <AddressFamily.AF_VSOCK: 40>
AF_WANPIPE = <AddressFamily.AF_WANPIPE: 25>
AF_X25 = <AddressFamily.AF_X25: 9>
AI_ADDRCONFIG = <AddressInfo.AI_ADDRCONFIG: 32>
AI_ALL = <AddressInfo.AI_ALL: 16>
AI_CANONNAME = <AddressInfo.AI_CANONNAME: 2>
AI_NUMERICHOST = <AddressInfo.AI_NUMERICHOST: 4>
AI_NUMERICSERV = <AddressInfo.AI_NUMERICSERV: 1024>
AI_PASSIVE = <AddressInfo.AI_PASSIVE: 1>
AI_V4MAPPED = <AddressInfo.AI_V4MAPPED: 8>
ALG_OP_DECRYPT = 0
ALG_OP_ENCRYPT = 1
ALG_OP_SIGN = 2
ALG_OP_VERIFY = 3
ALG_SET_AEAD_ASSOCLEN = 4
ALG_SET_AEAD_AUTHSIZE = 5
ALG_SET_IV = 2
ALG_SET_KEY = 1
ALG_SET_OP = 3
ALG_SET_PUBKEY = 6
CAN_BCM = 2
CAN_BCM_CAN_FD_FRAME = 2048
CAN_BCM_RX_ANNOUNCE_RESUME = 256
CAN_BCM_RX_CHANGED = 12
CAN_BCM_RX_CHECK_DLC = 64
CAN_BCM_RX_DELETE = 6
CAN_BCM_RX_FILTER_ID = 32
CAN_BCM_RX_NO_AUTOTIMER = 128
CAN_BCM_RX_READ = 7
CAN_BCM_RX_RTR_FRAME = 1024
CAN_BCM_RX_SETUP = 5
CAN_BCM_RX_STATUS = 10
CAN_BCM_RX_TIMEOUT = 11
CAN_BCM_SETTIMER = 1
CAN_BCM_STARTTIMER = 2
CAN_BCM_TX_ANNOUNCE = 8
CAN_BCM_TX_COUNTEVT = 4
CAN_BCM_TX_CP_CAN_ID = 16
CAN_BCM_TX_DELETE = 2
CAN_BCM_TX_EXPIRED = 9
CAN_BCM_TX_READ = 3
CAN_BCM_TX_RESET_MULTI_IDX = 512
CAN_BCM_TX_SEND = 4
CAN_BCM_TX_SETUP = 1
CAN_BCM_TX_STATUS = 8
CAN_EFF_FLAG = 2147483648
CAN_EFF_MASK = 536870911
CAN_ERR_FLAG = 536870912
CAN_ERR_MASK = 536870911
CAN_ISOTP = 6
CAN_J1939 = 7
CAN_RAW = 1
CAN_RAW_ERR_FILTER = 2
CAN_RAW_FD_FRAMES = 5
CAN_RAW_FILTER = 1
CAN_RAW_JOIN_FILTERS = 6
CAN_RAW_LOOPBACK = 3
CAN_RAW_RECV_OWN_MSGS = 4
CAN_RTR_FLAG = 1073741824
CAN_SFF_MASK = 2047
CAPI = <capsule object "_socket.CAPI" at 0x7f75e39d5cb0>
EAGAIN = 11
EAI_ADDRFAMILY = -9
EAI_AGAIN = -3
EAI_BADFLAGS = -1
EAI_FAIL = -4
EAI_FAMILY = -6
EAI_MEMORY = -10
EAI_NODATA = -5
EAI_NONAME = -2
EAI_OVERFLOW = -12
EAI_SERVICE = -8
EAI_SOCKTYPE = -7
EAI_SYSTEM = -11
EBADF = 9
EWOULDBLOCK = 11
INADDR_ALLHOSTS_GROUP = 3758096385
INADDR_ANY = 0
INADDR_BROADCAST = 4294967295
INADDR_LOOPBACK = 2130706433
INADDR_MAX_LOCAL_GROUP = 3758096639
INADDR_NONE = 4294967295
INADDR_UNSPEC_GROUP = 3758096384
IOCTL_VM_SOCKETS_GET_LOCAL_CID = 1977
IPPORT_RESERVED = 1024
IPPORT_USERRESERVED = 5000
IPPROTO_AH = 51
IPPROTO_DSTOPTS = 60
IPPROTO_EGP = 8
IPPROTO_ESP = 50
IPPROTO_FRAGMENT = 44
IPPROTO_GRE = 47
IPPROTO_HOPOPTS = 0
IPPROTO_ICMP = 1
IPPROTO_ICMPV6 = 58
IPPROTO_IDP = 22
IPPROTO_IGMP = 2
IPPROTO_IP = 0
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
IPPROTO_MPTCP = 262
IPPROTO_NONE = 59
IPPROTO_PIM = 103
IPPROTO_PUP = 12
IPPROTO_RAW = 255
IPPROTO_ROUTING = 43
IPPROTO_RSVP = 46
IPPROTO_SCTP = 132
IPPROTO_TCP = 6
IPPROTO_TP = 29
IPPROTO_UDP = 17
IPPROTO_UDPLITE = 136
IPV6_CHECKSUM = 7
IPV6_DONTFRAG = 62
IPV6_DSTOPTS = 59
IPV6_HOPLIMIT = 52
IPV6_HOPOPTS = 54
IPV6_JOIN_GROUP = 20
IPV6_LEAVE_GROUP = 21
IPV6_MULTICAST_HOPS = 18
IPV6_MULTICAST_IF = 17
IPV6_MULTICAST_LOOP = 19
IPV6_NEXTHOP = 9
IPV6_PATHMTU = 61
IPV6_PKTINFO = 50
IPV6_RECVDSTOPTS = 58
IPV6_RECVHOPLIMIT = 51
IPV6_RECVHOPOPTS = 53
IPV6_RECVPATHMTU = 60
IPV6_RECVPKTINFO = 49
IPV6_RECVRTHDR = 56
IPV6_RECVTCLASS = 66
IPV6_RTHDR = 57
IPV6_RTHDRDSTOPTS = 55
IPV6_RTHDR_TYPE_0 = 0
IPV6_TCLASS = 67
IPV6_UNICAST_HOPS = 16
IPV6_V6ONLY = 26
IP_ADD_MEMBERSHIP = 35
IP_DEFAULT_MULTICAST_LOOP = 1
IP_DEFAULT_MULTICAST_TTL = 1
IP_DROP_MEMBERSHIP = 36
IP_HDRINCL = 3
IP_MAX_MEMBERSHIPS = 20
IP_MULTICAST_IF = 32
IP_MULTICAST_LOOP = 34
IP_MULTICAST_TTL = 33
IP_OPTIONS = 4
IP_RECVOPTS = 6
IP_RECVRETOPTS = 7
IP_RECVTOS = 13
IP_RETOPTS = 7
IP_TOS = 1
IP_TRANSPARENT = 19
IP_TTL = 2
J1939_EE_INFO_NONE = 0
J1939_EE_INFO_TX_ABORT = 1
J1939_FILTER_MAX = 512
J1939_IDLE_ADDR = 254
J1939_MAX_UNICAST_ADDR = 253
J1939_NLA_BYTES_ACKED = 1
J1939_NLA_PAD = 0
J1939_NO_ADDR = 255
J1939_NO_NAME = 0
J1939_NO_PGN = 262144
J1939_PGN_ADDRESS_CLAIMED = 60928
J1939_PGN_ADDRESS_COMMANDED = 65240
J1939_PGN_MAX = 262143
J1939_PGN_PDU1_MAX = 261888
J1939_PGN_REQUEST = 59904
MSG_CMSG_CLOEXEC = <MsgFlag.MSG_CMSG_CLOEXEC: 1073741824>
MSG_CONFIRM = <MsgFlag.MSG_CONFIRM: 2048>
MSG_CTRUNC = <MsgFlag.MSG_CTRUNC: 8>
MSG_DONTROUTE = <MsgFlag.MSG_DONTROUTE: 4>
MSG_DONTWAIT = <MsgFlag.MSG_DONTWAIT: 64>
MSG_EOR = <MsgFlag.MSG_EOR: 128>
MSG_ERRQUEUE = <MsgFlag.MSG_ERRQUEUE: 8192>
MSG_FASTOPEN = <MsgFlag.MSG_FASTOPEN: 536870912>
MSG_MORE = <MsgFlag.MSG_MORE: 32768>
MSG_NOSIGNAL = <MsgFlag.MSG_NOSIGNAL: 16384>
MSG_OOB = <MsgFlag.MSG_OOB: 1>
MSG_PEEK = <MsgFlag.MSG_PEEK: 2>
MSG_TRUNC = <MsgFlag.MSG_TRUNC: 32>
MSG_WAITALL = <MsgFlag.MSG_WAITALL: 256>
NETLINK_CRYPTO = 21
NETLINK_DNRTMSG = 14
NETLINK_FIREWALL = 3
NETLINK_IP6_FW = 13
NETLINK_NFLOG = 5
NETLINK_ROUTE = 0
NETLINK_USERSOCK = 2
NETLINK_XFRM = 6
NI_DGRAM = 16
NI_MAXHOST = 1025
NI_MAXSERV = 32
NI_NAMEREQD = 8
NI_NOFQDN = 4
NI_NUMERICHOST = 1
NI_NUMERICSERV = 2
PACKET_BROADCAST = 1
PACKET_FASTROUTE = 6
PACKET_HOST = 0
PACKET_LOOPBACK = 5
PACKET_MULTICAST = 2
PACKET_OTHERHOST = 3
PACKET_OUTGOING = 4
PF_CAN = 29
PF_PACKET = 17
PF_RDS = 21
SCM_CREDENTIALS = 2
SCM_J1939_DEST_ADDR = 1
SCM_J1939_DEST_NAME = 2
SCM_J1939_ERRQUEUE = 4
SCM_J1939_PRIO = 3
SCM_RIGHTS = 1
SHUT_RD = 0
SHUT_RDWR = 2
SHUT_WR = 1
SOCK_CLOEXEC = <SocketKind.SOCK_CLOEXEC: 524288>
SOCK_DGRAM = <SocketKind.SOCK_DGRAM: 2>
SOCK_NONBLOCK = <SocketKind.SOCK_NONBLOCK: 2048>
SOCK_RAW = <SocketKind.SOCK_RAW: 3>
SOCK_RDM = <SocketKind.SOCK_RDM: 4>
SOCK_SEQPACKET = <SocketKind.SOCK_SEQPACKET: 5>
SOCK_STREAM = <SocketKind.SOCK_STREAM: 1>
SOL_ALG = 279
SOL_CAN_BASE = 100
SOL_CAN_RAW = 101
SOL_IP = 0
SOL_RDS = 276
SOL_SOCKET = 1
SOL_TCP = 6
SOL_TIPC = 271
SOL_UDP = 17
SOMAXCONN = 4096
SO_ACCEPTCONN = 30
SO_BINDTODEVICE = 25
SO_BROADCAST = 6
SO_DEBUG = 1
SO_DOMAIN = 39
SO_DONTROUTE = 5
SO_ERROR = 4
SO_J1939_ERRQUEUE = 4
SO_J1939_FILTER = 1
SO_J1939_PROMISC = 2
SO_J1939_SEND_PRIO = 3
SO_KEEPALIVE = 9
SO_LINGER = 13
SO_MARK = 36
SO_OOBINLINE = 10
SO_PASSCRED = 16
SO_PASSSEC = 34
SO_PEERCRED = 17
SO_PEERSEC = 31
SO_PRIORITY = 12
SO_PROTOCOL = 38
SO_RCVBUF = 8
SO_RCVLOWAT = 18
SO_RCVTIMEO = 20
SO_REUSEADDR = 2
SO_REUSEPORT = 15
SO_SNDBUF = 7
SO_SNDLOWAT = 19
SO_SNDTIMEO = 21
SO_TYPE = 3
SO_VM_SOCKETS_BUFFER_MAX_SIZE = 2
SO_VM_SOCKETS_BUFFER_MIN_SIZE = 1
SO_VM_SOCKETS_BUFFER_SIZE = 0
TCP_CONGESTION = 13
TCP_CORK = 3
TCP_DEFER_ACCEPT = 9
TCP_FASTOPEN = 23
TCP_INFO = 11
TCP_KEEPCNT = 6
TCP_KEEPIDLE = 4
TCP_KEEPINTVL = 5
TCP_LINGER2 = 8
TCP_MAXSEG = 2
TCP_NODELAY = 1
TCP_NOTSENT_LOWAT = 25
TCP_QUICKACK = 12
TCP_SYNCNT = 7
TCP_USER_TIMEOUT = 18
TCP_WINDOW_CLAMP = 10
TIPC_ADDR_ID = 3
TIPC_ADDR_NAME = 2
TIPC_ADDR_NAMESEQ = 1
TIPC_CFG_SRV = 0
TIPC_CLUSTER_SCOPE = 2
TIPC_CONN_TIMEOUT = 130
TIPC_CRITICAL_IMPORTANCE = 3
TIPC_DEST_DROPPABLE = 129
TIPC_HIGH_IMPORTANCE = 2
TIPC_IMPORTANCE = 127
TIPC_LOW_IMPORTANCE = 0
TIPC_MEDIUM_IMPORTANCE = 1
TIPC_NODE_SCOPE = 3
TIPC_PUBLISHED = 1
TIPC_SRC_DROPPABLE = 128
TIPC_SUBSCR_TIMEOUT = 3
TIPC_SUB_CANCEL = 4
TIPC_SUB_PORTS = 1
TIPC_SUB_SERVICE = 2
TIPC_TOP_SRV = 1
TIPC_WAIT_FOREVER = -1
TIPC_WITHDRAWN = 2
TIPC_ZONE_SCOPE = 1
UDPLITE_RECV_CSCOV = 11
UDPLITE_SEND_CSCOV = 10
VMADDR_CID_ANY = 4294967295
VMADDR_CID_HOST = 2
VMADDR_PORT_ANY = 4294967295
VM_SOCKETS_INVALID_VERSION = 4294967295
has_ipv6 = True