sock_get_opt_size()

Retrieves the size of a particular option for the socket.

Description

The sock_get_opt_size() function retrieves the size of a specific socket option for the given socket descriptor.

Syntax

  ;;; Note: This is similar to `getsockopt` in POSIX for SO_RCVBUF
  ;;; Retrieve the size of particular option for this socket
  (@interface func (export "sock_get_opt_size")
    ;;; Socket descriptor
    (param $fd $fd)
    ;;; Socket option to be retrieved
    (param $sockopt $sock_option)
    (result $error (expected $filesize (error $errno)))
  )

Parameters

• ctx: A mutable reference to the function environment.
• sock: The socket descriptor.
• opt: The socket option to be retrieved.
• ret_size: A WebAssembly pointer to store the retrieved size value.

Return Value

The function returns an Errno value indicating the outcome of the operation. If the operation is successful, Errno::Success is returned. If an error occurs, an appropriate Errno value is returned.

Notes

• The sock_get_opt_size() function retrieves the size of a specific socket option for the specified socket descriptor.
• The specific socket option to retrieve is determined by the opt parameter.
• The retrieved size value is stored at the memory location pointed to by the ret_size parameter.
• The behavior and limitations of the sock_get_opt_size() function may vary depending on the specific runtime environment and underlying networking implementation. It is important to consult the documentation or specifications of the specific environment to understand its behavior in that context.