WS_CHANNEL_TYPE enumeration

Indicates the basic characteristics of the channel, such as whether it is sessionful, and what directions of communication are supported.

Syntax

enum WS_CHANNEL_TYPE {  WS_CHANNEL_TYPE_INPUT           = 0x1, 
  WS_CHANNEL_TYPE_OUTPUT          = 0x2, 
  WS_CHANNEL_TYPE_SESSION         = 0x4, 
  WS_CHANNEL_TYPE_INPUT_SESSION   = WS_CHANNEL_TYPE_INPUT | WS_CHANNEL_TYPE_SESSION, 
  WS_CHANNEL_TYPE_OUTPUT_SESSION  = WS_CHANNEL_TYPE_OUTPUT | WS_CHANNEL_TYPE_SESSION, 
  WS_CHANNEL_TYPE_DUPLEX          = WS_CHANNEL_TYPE_INPUT | WS_CHANNEL_TYPE_OUTPUT, 
  WS_CHANNEL_TYPE_DUPLEX_SESSION  = WS_CHANNEL_TYPE_INPUT | WS_CHANNEL_TYPE_OUTPUT | WS_CHANNEL_TYPE_SESSION, 
  WS_CHANNEL_TYPE_REQUEST         = 0x8, 
  WS_CHANNEL_TYPE_REPLY           = 0x10 

};

Constants

WS_CHANNEL_TYPE_INPUT

Input channels support Receive operations. They are used on the sender side.

The WS_UDP_CHANNEL_BINDING supports this channel type when used with WsCreateChannelForListener.

WS_CHANNEL_TYPE_OUTPUT

Output channels support Send operations.

This channel type is not currently supported by any channel bindings.

WS_CHANNEL_TYPE_SESSION

Sessionful channels provide channel-level correlation of all messages sent or received.

This is a flag used to build WS_CHANNEL_TYPE_INPUT_SESSION, WS_CHANNEL_TYPE_OUTPUT_SESSION, and WS_CHANNEL_TYPE_DUPLEX_SESSION, but cannot be used alone.

WS_CHANNEL_TYPE_INPUT_SESSION

An input channel that supports a session.

This channel type is not currently supported by any channel bindings.

WS_CHANNEL_TYPE_OUTPUT_SESSION

An output channel that supports a session.

This channel type is not currently supported by any channel bindings.

WS_CHANNEL_TYPE_DUPLEX

An input/output channel.

The WS_UDP_CHANNEL_BINDING supports this channel type when used with WsCreateChannel.

WS_CHANNEL_TYPE_DUPLEX_SESSION

An input/output channel that supports a session.

The WS_TCP_CHANNEL_BINDING supports this channel type when used with WsCreateChannel or WsCreateChannelForListener.

WS_CHANNEL_TYPE_REQUEST

Request channels support Send followed by Receive. They are used on the client side for channels that support request-reply operations.

The WS_HTTP_CHANNEL_BINDING supports this channel type when used with WsCreateChannel.

Note that request channels provide built-in correlation of request replies. It is possible to do request-reply correlation on other channel types using the addressing headers (RelatesTo and MessageID).

WS_CHANNEL_TYPE_REPLY

Reply channels support Receive followed by Send. They are used on the service side for channels that support request-reply operations (for example, HTTP).

The WS_HTTP_CHANNEL_BINDING supports this channel type when used with WsCreateChannelForListener.

Note that reply channels provide built-in correlation of request replies. It is possible to do request-reply correlation on other channel types using the addressing headers (RelatesTo and MessageID).

Requirements