Trait Host

pub trait Host: Send {
    // Required method
    fn create_tcp_socket(
        &mut self,
        address_family: IpAddressFamily,
    ) -> Result<Resource<TcpSocket>, SocketError>;
}

Required Methods

fn create_tcp_socket( &mut self, address_family: IpAddressFamily, ) -> Result<Resource<TcpSocket>, SocketError>

Create a new TCP socket.

Similar to socket(AF_INET or AF_INET6, SOCK_STREAM, IPPROTO_TCP) in POSIX. On IPv6 sockets, IPV6_V6ONLY is enabled by default and can’t be configured otherwise.

This function does not require a network capability handle. This is considered to be safe because at time of creation, the socket is not bound to any network yet. Up to the moment bind/connect is called, the socket is effectively an in-memory configuration object, unable to communicate with the outside world.

All sockets are non-blocking. Use the wasi-poll interface to block on asynchronous operations.

Typical errors

• not-supported: The specified address-family is not supported. (EAFNOSUPPORT)
• new-socket-limit: The new socket resource could not be created because of a system limit. (EMFILE, ENFILE)

References

• https://pubs.opengroup.org/onlinepubs/9699919799/functions/socket.html
• https://man7.org/linux/man-pages/man2/socket.2.html
• https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsasocketw
• https://man.freebsd.org/cgi/man.cgi?query=socket&sektion=2

Implementations on Foreign Types

impl<_T: Host + ?Sized + Send> Host for &mut _T

fn create_tcp_socket( &mut self, address_family: IpAddressFamily, ) -> Result<Resource<TcpSocket>, SocketError>

Create a new TCP socket.

Similar to socket(AF_INET or AF_INET6, SOCK_STREAM, IPPROTO_TCP) in POSIX. On IPv6 sockets, IPV6_V6ONLY is enabled by default and can’t be configured otherwise.

This function does not require a network capability handle. This is considered to be safe because at time of creation, the socket is not bound to any network yet. Up to the moment bind/connect is called, the socket is effectively an in-memory configuration object, unable to communicate with the outside world.

All sockets are non-blocking. Use the wasi-poll interface to block on asynchronous operations.

Typical errors

• not-supported: The specified address-family is not supported. (EAFNOSUPPORT)
• new-socket-limit: The new socket resource could not be created because of a system limit. (EMFILE, ENFILE)

References

• https://pubs.opengroup.org/onlinepubs/9699919799/functions/socket.html
• https://man7.org/linux/man-pages/man2/socket.2.html
• https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsasocketw
• https://man.freebsd.org/cgi/man.cgi?query=socket&sektion=2

Implementors

impl<T> Host for WasiImpl<T>

where T: WasiView,