sock_shutdown()

Shut down socket send and receive channels.

Description

The sock_shutdown() function is used to shut down the send and receive channels of a socket. It is similar to the shutdown function in POSIX. The function allows you to selectively shut down either the send channel, the receive channel, or both channels of the socket.

Syntax

  ;;; Note: This is similar to `shutdown` in POSIX.
  ;;; Shut down socket send and receive channels.
  (@interface func (export "sock_shutdown")
    (param $fd $fd)
    ;;; Which channels on the socket to shut down.
    (param $how $sdflags)
    (result $error (expected (error $errno)))
  )

Parameters

• ctx: A mutable reference to the function environment.
• sock: The file descriptor of the socket to shut down.
• how: Specifies which channels on the socket to shut down.

Return Value

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

Notes

• The sock_shutdown() function allows you to shut down the send and/or receive channels of a socket.
• The how parameter specifies which channels to shut down. It can take one of the following values:
  • __WASI_SHUT_RD: Shut down the receive channel.
  • __WASI_SHUT_WR: Shut down the send channel.
  • __WASI_SHUT_RD | __WASI_SHUT_WR: Shut down both the send and receive channels.
• The function maps the how value to the corresponding std::net::Shutdown enum variant and passes it to the underlying socket's shutdown() method.
• The specific behavior of the sock_shutdown() function may vary depending on the runtime environment and underlying networking implementation.