| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
DBus.Transport
Description
Support for defining custom transport mechanisms. Most users will not need to care about the types defined in this module.
- class Transport t where
- data TransportOptions t :: *
- class Transport t => TransportOpen t where
- class Transport t => TransportListen t where
- data TransportListener t :: *
- data TransportError
- transportError :: String -> TransportError
- transportErrorMessage :: TransportError -> String
- transportErrorAddress :: TransportError -> Maybe Address
- data SocketTransport
- socketTransportOptionBacklog :: TransportOptions SocketTransport -> Int
- socketTransportCredentials :: SocketTransport -> IO (CUInt, CUInt, CUInt)
Transports
class Transport t where Source #
A Transport can exchange bytes with a remote peer.
Minimal complete definition
transportDefaultOptions, transportPut, transportGet, transportClose
Associated Types
data TransportOptions t :: * Source #
Additional options that this transport type may use when establishing a connection.
Methods
transportDefaultOptions :: TransportOptions t Source #
Default values for this transport's options.
transportPut :: t -> ByteString -> IO () Source #
Send a ByteString over the transport.
Throws a TransportError if an error occurs.
transportGet :: t -> Int -> IO ByteString Source #
Receive a ByteString of the given size from the transport. The
transport should block until sufficient bytes are available, and
only return fewer than the requested amount if there will not be
any more data.
Throws a TransportError if an error occurs.
transportClose :: t -> IO () Source #
Close an open transport, and release any associated resources or handles.
Instances
class Transport t => TransportOpen t where Source #
A Transport which can open a connection to a remote peer.
Minimal complete definition
Methods
transportOpen :: TransportOptions t -> Address -> IO t Source #
Open a connection to the given address, using the given options.
Throws a TransportError if the connection could not be
established.
Instances
class Transport t => TransportListen t where Source #
A Transport which can listen for and accept connections from remote
peers.
Minimal complete definition
transportListen, transportAccept, transportListenerClose, transportListenerAddress, transportListenerUUID
Associated Types
data TransportListener t :: * Source #
Used for transports that listen on a port or address.
Methods
transportListen :: TransportOptions t -> Address -> IO (TransportListener t) Source #
Begin listening for connections on the given address, using the given options.
Throws a TransportError if it's not possible to listen at that
address (for example, if the port is already in use).
transportAccept :: TransportListener t -> IO t Source #
Accept a new connection.
Throws a TransportError if some error happens before the
transport is ready to exchange bytes.
transportListenerClose :: TransportListener t -> IO () Source #
Close an open listener.
transportListenerAddress :: TransportListener t -> Address Source #
Get the address to use to connect to a listener.
transportListenerUUID :: TransportListener t -> UUID Source #
Get the UUID allocated to this transport listener.
See randomUUID.
Instances
Transport errors
Socket transport
data SocketTransport Source #
Supports connecting over Unix or TCP sockets.
Unix sockets are similar to pipes, but exist as special files in the filesystem. On Linux, abstract sockets have a path-like address, but do not actually have entries in the filesystem.
TCP sockets may use either IPv4 or IPv6.
socketTransportOptionBacklog :: TransportOptions SocketTransport -> Int Source #
The maximum size of the connection queue for a listening socket.
socketTransportCredentials :: SocketTransport -> IO (CUInt, CUInt, CUInt) Source #
Returns the processID, userID, and groupID of the socket's peer.
See getPeerCred.