The raw network byte order number is read using host byte order. Therefore on little-endian architectures the byte order is swapped. For example 127.0.0.1 is represented as 0x0100007f on little-endian hosts and as 0x7f000001 on big-endian hosts.

For direct manipulation prefer hostAddressToTuple and tupleToHostAddress.

Independent of endianness. For example ::1 is stored as (0, 0, 0, 1).

For direct manipulation prefer hostAddress6ToTuple and tupleToHostAddress6.

Use the Num instance (i.e. use a literal) to create a PortNumber value with the correct network-byte-ordering. You should not use the PortNum constructor. It will be removed in the next release.

>>> 1 :: PortNumber
1
>>> read "1" :: PortNumber
1

The existence of a constructor does not necessarily imply that that socket address type is supported on your system: see isSupportedSockAddr.

Read a SockAddr from the given memory location.

Write the given SockAddr to the given memory location.

Computes the storage requirements (in bytes) of the given SockAddr. This function differs from sizeOf in that the value of the argument is used.

Computes the storage requirements (in bytes) required for a SockAddr with the given Family.

Use a SockAddr with a function requiring a pointer to a SockAddr and the length of that SockAddr.

Create a new SockAddr for use with a function requiring a pointer to a SockAddr and the length of that SockAddr.

Address families.

A constructor being present here does not mean it is supported by the operating system: see isSupportedFamily.

Throw an IOError corresponding to the current socket error.

Like throwSocketError, but the error code is supplied as an argument.

On Windows, do not use errno. Use a system error code instead.

Throw an IOError corresponding to the current socket error if the IO action returns a result of -1. Discards the result of the IO action after error handling.

Throw an IOError corresponding to the current socket error if the IO action returns a result of -1, but retries in case of an interrupted operation.

Throw an IOError corresponding to the current socket error if the IO action returns a result of -1, but retries in case of an interrupted operation. Discards the result of the IO action after error handling.

Throw an IOError corresponding to the current socket error if the IO action returns a result of -1, but retries in case of an interrupted operation. Checks for operations that would block and executes an alternative action before retrying in that case.

Like throwSocketErrorIfMinus1Retry, but if the action fails with EWOULDBLOCK or similar, wait for the socket to be read-ready, and try again.

Like throwSocketErrorIfMinus1Retry, but if the action fails with EWOULDBLOCK or similar, wait for the socket to be write-ready, and try again.

With older versions of the network library (version 2.6.0.2 or earlier) on Windows operating systems, the networking subsystem must be initialised using withSocketsDo before any networking operations can be used. eg.

main = withSocketsDo $ do {...}

It is fine to nest calls to withSocketsDo, and to perform networking operations after withSocketsDo has returned.

In newer versions of the network library (version v2.6.1.0 or later) it is only necessary to call withSocketsDo if you are calling the MkSocket constructor directly. However, for compatibility with older versions on Windows, it is good practice to always call withSocketsDo (it's very cheap).

Zero a structure.