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WS_CHANNEL_PROPERTY_ID enumeration (webservices.h)

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Each channel property is identified by an ID and has an associated value. If a property is not specified when the channel is created, then its default value is used.

Syntax

typedef enum {
  WS_CHANNEL_PROPERTY_MAX_BUFFERED_MESSAGE_SIZE = 0,
  WS_CHANNEL_PROPERTY_MAX_STREAMED_MESSAGE_SIZE = 1,
  WS_CHANNEL_PROPERTY_MAX_STREAMED_START_SIZE = 2,
  WS_CHANNEL_PROPERTY_MAX_STREAMED_FLUSH_SIZE = 3,
  WS_CHANNEL_PROPERTY_ENCODING = 4,
  WS_CHANNEL_PROPERTY_ENVELOPE_VERSION = 5,
  WS_CHANNEL_PROPERTY_ADDRESSING_VERSION = 6,
  WS_CHANNEL_PROPERTY_MAX_SESSION_DICTIONARY_SIZE = 7,
  WS_CHANNEL_PROPERTY_STATE = 8,
  WS_CHANNEL_PROPERTY_ASYNC_CALLBACK_MODEL = 9,
  WS_CHANNEL_PROPERTY_IP_VERSION = 10,
  WS_CHANNEL_PROPERTY_RESOLVE_TIMEOUT = 11,
  WS_CHANNEL_PROPERTY_CONNECT_TIMEOUT = 12,
  WS_CHANNEL_PROPERTY_SEND_TIMEOUT = 13,
  WS_CHANNEL_PROPERTY_RECEIVE_RESPONSE_TIMEOUT = 14,
  WS_CHANNEL_PROPERTY_RECEIVE_TIMEOUT = 15,
  WS_CHANNEL_PROPERTY_CLOSE_TIMEOUT = 16,
  WS_CHANNEL_PROPERTY_ENABLE_TIMEOUTS = 17,
  WS_CHANNEL_PROPERTY_TRANSFER_MODE = 18,
  WS_CHANNEL_PROPERTY_MULTICAST_INTERFACE = 19,
  WS_CHANNEL_PROPERTY_MULTICAST_HOPS = 20,
  WS_CHANNEL_PROPERTY_REMOTE_ADDRESS = 21,
  WS_CHANNEL_PROPERTY_REMOTE_IP_ADDRESS = 22,
  WS_CHANNEL_PROPERTY_HTTP_CONNECTION_ID = 23,
  WS_CHANNEL_PROPERTY_CUSTOM_CHANNEL_CALLBACKS = 24,
  WS_CHANNEL_PROPERTY_CUSTOM_CHANNEL_PARAMETERS = 25,
  WS_CHANNEL_PROPERTY_CUSTOM_CHANNEL_INSTANCE = 26,
  WS_CHANNEL_PROPERTY_TRANSPORT_URL = 27,
  WS_CHANNEL_PROPERTY_NO_DELAY = 28,
  WS_CHANNEL_PROPERTY_SEND_KEEP_ALIVES = 29,
  WS_CHANNEL_PROPERTY_KEEP_ALIVE_TIME = 30,
  WS_CHANNEL_PROPERTY_KEEP_ALIVE_INTERVAL = 31,
  WS_CHANNEL_PROPERTY_MAX_HTTP_SERVER_CONNECTIONS = 32,
  WS_CHANNEL_PROPERTY_IS_SESSION_SHUT_DOWN = 33,
  WS_CHANNEL_PROPERTY_CHANNEL_TYPE = 34,
  WS_CHANNEL_PROPERTY_TRIM_BUFFERED_MESSAGE_SIZE = 35,
  WS_CHANNEL_PROPERTY_ENCODER = 36,
  WS_CHANNEL_PROPERTY_DECODER = 37,
  WS_CHANNEL_PROPERTY_PROTECTION_LEVEL = 38,
  WS_CHANNEL_PROPERTY_COOKIE_MODE = 39,
  WS_CHANNEL_PROPERTY_HTTP_PROXY_SETTING_MODE = 40,
  WS_CHANNEL_PROPERTY_CUSTOM_HTTP_PROXY = 41,
  WS_CHANNEL_PROPERTY_HTTP_MESSAGE_MAPPING = 42,
  WS_CHANNEL_PROPERTY_ENABLE_HTTP_REDIRECT = 43,
  WS_CHANNEL_PROPERTY_HTTP_REDIRECT_CALLBACK_CONTEXT = 44,
  WS_CHANNEL_PROPERTY_FAULTS_AS_ERRORS = 45,
  WS_CHANNEL_PROPERTY_ALLOW_UNSECURED_FAULTS = 46,
  WS_CHANNEL_PROPERTY_HTTP_SERVER_SPN = 47,
  WS_CHANNEL_PROPERTY_HTTP_PROXY_SPN = 48,
  WS_CHANNEL_PROPERTY_MAX_HTTP_REQUEST_HEADERS_BUFFER_SIZE = 49
} WS_CHANNEL_PROPERTY_ID;

Constants

 
WS_CHANNEL_PROPERTY_MAX_BUFFERED_MESSAGE_SIZE
Value: 0
A ULONG
used with WsCreateChannel, WsCreateChannelForListener or
WsGetChannelProperty for WS_TCP_CHANNEL_BINDING,
WS_HTTP_CHANNEL_BINDING, or WS_NAMEDPIPE_CHANNEL_BINDING. This value is a limit as to how big of a
message may be received or sent by the channel. The limit specifies the maximum size
of the envelope in bytes as it appears in its encoded wire form.
The minimum value is 1.


This property limits the amount of memory
that the channel will allocate in order to receive or send a buffered message.
When receiving with buffered input, the entire message is read into a
buffer before the application has access to it. When sending with buffered output,
the entire message is accumulated in a buffer before being sent.


This property may only be specified when buffered input or output has been
specified (either WS_STREAMED_INPUT_TRANSFER_MODE or
WS_STREAMED_OUTPUT_TRANSFER_MODE have not been set).


The default value is 65536.


The WS_UDP_CHANNEL_BINDING always uses the value 65536.
WS_CHANNEL_PROPERTY_MAX_STREAMED_MESSAGE_SIZE
Value: 1
An unsigned __int64 used with WsCreateChannel, WsCreateChannelForListener or
WsGetChannelProperty
WS_HTTP_CHANNEL_BINDING. This
value is a limit as to how big of a streamed message may be received or sent
for the channel.
The limit specifies the maximum size of the envelope in bytes as it appears
in its encoded wire form. The minimum value is 1.


This property may only be specified when streamed input or output has been selected
(WS_STREAMED_INPUT_TRANSFER_MODE or WS_STREAMED_OUTPUT_TRANSFER_MODE has been set).


The default value is 4194304.
WS_CHANNEL_PROPERTY_MAX_STREAMED_START_SIZE
Value: 2
A ULONG used with WsCreateChannel, WsCreateChannelForListener or
WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING.
This value is a limit as to how big the start of a message may be.
The start of a message consists of the envelope tag, the headers, and the body tag.
The limit specifies the maximum size of the data in bytes as it appears in
its encoded wire form. The minimum value is 1.


This property may only be specified when streamed input has been selected
(WS_STREAMED_INPUT_TRANSFER_MODE).


This property limits the amount of memory that the channel will allocate
in order to read the start of the message. For streaming input, the
entire start of the message will be read into a buffer before the application
is notified that the start of the message has been read.


The default value is 16384.
WS_CHANNEL_PROPERTY_MAX_STREAMED_FLUSH_SIZE
Value: 3
A ULONG used with WsCreateChannel, WsCreateChannelForListener or
WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING.
This value is a limit as to how many bytes will be accumulated
before WsFlushBody is called.


This property may only be specified when streamed output has been selected
(WS_STREAMED_OUTPUT_TRANSFER_MODE).


This property limits the amount of memory that the channel will allocate
in order to accumulated buffered data. For streaming output, the
channel will accumulate data in a buffer until WsFlushBody is called.


The default value is 65536.
WS_CHANNEL_PROPERTY_ENCODING
Value: 4
A WS_ENCODING value
used with WsCreateChannel, WsCreateChannelForListener or WsGetChannelProperty for WS_TCP_CHANNEL_BINDING or WS_HTTP_CHANNEL_BINDING.
This value specifies what encoding to use for the channel.


The default value depends on the binding:



The WS_UDP_CHANNEL_BINDING always uses the value WS_ENCODING_XML_UTF8.
WS_CHANNEL_PROPERTY_ENVELOPE_VERSION
Value: 5
A WS_ENVELOPE_VERSION value
used with WsCreateChannel, WsCreateChannelForListener or WsGetChannelProperty.
This value specifies what envelope version to use for the channel. The
envelope version of the channel must match that of the message used with
the channel.


This property is not supported with the WS_NAMEDPIPE_CHANNEL_BINDING. Named Pipe channels always use WS_ENVELOPE_VERSION_SOAP_1_2.

The default value depends on the binding:
WS_CHANNEL_PROPERTY_ADDRESSING_VERSION
Value: 6
A WS_ADDRESSING_VERSION value
used with WsCreateChannel, WsCreateChannelForListener or WsGetChannelProperty.
This value specifies what addressing version to use for the channel. The
addressing version of the channel must match that of the message used with
the channel.


The default value depends on the binding:



The WS_ADDRESSING_VERSION_TRANSPORT is only supported for
WS_HTTP_CHANNEL_BINDING.
WS_CHANNEL_PROPERTY_MAX_SESSION_DICTIONARY_SIZE
Value: 7
A ULONG used with WsCreateChannel, WsCreateChannelForListener or WsGetChannelProperty.
This property is only valid for WS_TCP_CHANNEL_BINDING or WS_NAMEDPIPE_CHANNEL_BINDING.
This value specifies the quota for number of bytes of session dictionary
strings that will be transmitted or received when using a session-based encoding.


The only session-based encoding supported currently is
WS_ENCODING_XML_BINARY_SESSION_1, which is the default encoding
for the WS_TCP_CHANNEL_BINDING.


If the quota is reached on the receiving side, then the channel
will fault.


If the quota is reached on the sending side, then the channel will simply
transmit the string without using the session dictionary.


This value is ignored if not using a session-based encoding.


The default value is 2048.
WS_CHANNEL_PROPERTY_STATE
Value: 8
A WS_CHANNEL_STATE value
returned by WsGetChannelProperty.


The returned value is a snapshot of the current state, so it is
possible that the state may have changed before the caller has
had a chance to examine the value.
WS_CHANNEL_PROPERTY_ASYNC_CALLBACK_MODEL
Value: 9
A WS_CALLBACK_MODEL value used with WsCreateChannel or WsGetChannelProperty.
This value indicates the preferred async callback model when issuing
async operations for the channel.


If using WsCreateChannelForListener see
WS_LISTENER_PROPERTY_ASYNC_CALLBACK_MODEL.


The default is WS_LONG_CALLBACK.


Both the WS_SERVICE_HOST and WS_SERVICE_PROXY only support WS_LONG_CALLBACK
as an acceptable value for this property.
WS_CHANNEL_PROPERTY_IP_VERSION
Value: 10
A WS_IP_VERSION value
used with WsCreateChannel or WsGetChannelProperty for WS_TCP_CHANNEL_BINDING or WS_UDP_CHANNEL_BINDING.
This property specifies which IP version that the channel should use to
communicate with the remote endpoint.


To specify the IP version to use for channels that are accepted, use the
WS_LISTENER_PROPERTY_IP_VERSION listener property when
creating the listener object.


The default value is WS_IP_VERSION_AUTO.
WS_CHANNEL_PROPERTY_RESOLVE_TIMEOUT
Value: 11
A ULONG used with WsCreateChannel, WsSetChannelProperty,
or WsSetChannelProperty for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST.
This timeout limits the amount of time that will be spent resolving
the DNS name. The timeout value is in milliseconds,
where the value INFINITE indicates no timeout.


This property can be set in any channel state.


The default value is INFINITE.
WS_CHANNEL_PROPERTY_CONNECT_TIMEOUT
Value: 12
A ULONG used with WsCreateChannel,
WsSetChannelProperty, or WsGetChannelProperty
for WS_TCP_CHANNEL_BINDING or WS_NAMEDPIPE_CHANNEL_BINDING on the client side.
This timeout limits the amount of time that will be spent to connect to the remote machine and complete the net.tcp or net.pipe handshake. The timeout value
is in milliseconds, where the value INFINITE indicates no timeout. To set
or get the corresponding timeout on the server side, use
(WS_LISTENER_PROPERTY_CONNECT_TIMEOUT).


Used with WsCreateChannel,
WsSetChannelProperty, or WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST.
This timeout limits the amount of time that will be spent to connect
to the HTTP server. The timeout value is in milliseconds,
where the value INFINITE indicates no timeout.


This property can be set in any channel state.


The default value is 30000 (30 seconds).


The WS_SERVICE_PROXY sets this timeout to INFINITE by default.
WS_CHANNEL_PROPERTY_SEND_TIMEOUT
Value: 13
A ULONG used with WsCreateChannel, WsCreateChannelForListener,
WsSetChannelProperty, or WsGetChannelProperty
for WS_TCP_CHANNEL_BINDING or WS_NAMEDPIPE_CHANNEL_BINDING. This timeout limits the
amount of time that will be spent sending the bytes of the message.
The timeout value is in milliseconds, where the value INFINITE indicates
no timeout.


Used with WsCreateChannel, WsSetChannelProperty,
or WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING
and WS_CHANNEL_TYPE_REQUEST.
This timeout limits the amount of time that will be spent sending the
HTTP headers and the bytes of the message. The timeout value is in milliseconds, where the
value INFINITE indicates no timeout.


This property can be set in any channel state.


The default value is 30000 (30 seconds).


Both WS_SERVICE_HOST and WS_SERVICE_PROXY set this
timeout to INFINITE by default.
WS_CHANNEL_PROPERTY_RECEIVE_RESPONSE_TIMEOUT
Value: 14
A ULONG used with WsCreateChannel, WsSetChannelProperty,
or WsSetChannelProperty for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST.
This timeout limits the amount of time that will be spent waiting for
all the response headers to be received from the server.
The timeout value is in milliseconds, where the value INFINITE indicates no timeout.


This property can be set in any channel state.


The default value is 30000 (30 seconds).


The WS_SERVICE_PROXY sets this timeout to INFINITE.
WS_CHANNEL_PROPERTY_RECEIVE_TIMEOUT
Value: 15
A ULONG used with WsCreateChannel, WsCreateChannelForListener,
WsSetChannelProperty, or WsGetChannelProperty,
for WS_TCP_CHANNEL_BINDING or WS_NAMEDPIPE_CHANNEL_BINDING.
This timeout limits the amount of time that will be spent receiving the
the bytes of the message.
The timeout value is in milliseconds, where the value INFINITE indicates
no timeout.


Used with WsCreateChannel, WsSetChannelProperty,
or WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST.
This timeout limits the amount of time that will be spent receiving the
bytes of the message. The timeout value is in milliseconds,
where the value INFINITE indicates no timeout.
This timeout can be triggered by WsWriteMessageEnd, WsReadMessageStart, and WsReadMessageEnd.

This property can be set in any channel state.


The default value is 30000 (30 seconds).


Both WS_SERVICE_HOST and WS_SERVICE_PROXY set this
timeout to INFINITE by default.
WS_CHANNEL_PROPERTY_CLOSE_TIMEOUT
Value: 16
A ULONG used with WsCreateChannel, WsCreateChannelForListener
WsSetChannelProperty, or WsGetChannelProperty
for WS_TCP_CHANNEL_BINDING or WS_NAMEDPIPE_CHANNEL_BINDING.
This timeout limits the amount of time that will be spent completing the
the close net.tcp or net.pipe handshake. The timeout value is in milliseconds, where the
value INFINITE indicates no timeout.


This property can be set in any channel state.


The default value is 30000 (30 seconds).


The WS_SERVICE_PROXY sets this timeout to INFINITE by default.
WS_CHANNEL_PROPERTY_ENABLE_TIMEOUTS
Value: 17
A BOOL used with WsCreateChannel for WS_HTTP_CHANNEL_BINDING, WS_TCP_CHANNEL_BINDING, WS_NAMEDPIPE_CHANNEL_BINDING,
and WS_UDP_CHANNEL_BINDING.
Used with WsGetChannelProperty for WS_CUSTOM_CHANNEL_BINDING.


When this property is set to TRUE or not supplied when calling WsCreateChannel,
more specific channel timeout properties (e.g. WS_CHANNEL_PROPERTY_SEND_TIMEOUT)
takes precedence and behaves as documented. When this property is set to FALSE,
all specific channel timeout properties are set to INFINITE unless they are explicitly specified.


This property can be queried from a custom channel using WsGetChannelProperty,
see WS_GET_CHANNEL_PROPERTY_CALLBACK for more details.


The default value is TRUE.


In order to implement their own timeout logic, WS_SERVICE_PROXY and
WS_SERVICE_HOST sets this property to FALSE for the
standard channels bindings and require custom channels to support it by querying and
verifying that it is set to FALSE.
More specific timeout properties can still be provided as described above.
WS_CHANNEL_PROPERTY_TRANSFER_MODE
Value: 18
A WS_TRANSFER_MODE value
used with WsCreateChannel
for WS_HTTP_CHANNEL_BINDING to control whether messages
sent and received on the channel are buffered or streamed. The client
and server may use different transfer modes and still be able to communicate.


All channels support WsGetChannelProperty for this
property.


For channel bindings other than WS_HTTP_CHANNEL_BINDINGthe value is always WS_BUFFERED_TRANSFER_MODE.


The default property value is WS_BUFFERED_TRANSFER_MODE. Note,
only WS_BUFFERED_TRANSFER_MODE is used by Service Model for both
WS_SERVICE_PROXY and WS_SERVICE_HOST. The only exception
is around using message contracts on WS_SERVICE_HOST, where
WS_STREAMED_OUTPUT_TRANSFER_MODE is allowed.



WS_STREAMED_OUTPUT_TRANSFER_MODE with WS_CHANNEL_TYPE_REQUEST requires Windows Vista and above, and supports only WS_HTTP_HEADER_AUTH_SCHEME_BASIC when used with security.
WS_CHANNEL_PROPERTY_MULTICAST_INTERFACE
Value: 19
A ULONG used with WsCreateChannel, WsSetChannelProperty,
or WsGetChannelProperty for WS_UDP_CHANNEL_BINDING
with WS_CHANNEL_TYPE_DUPLEX to indicate which adapter
should be used when sending to a multicast address.


The value is the interface index of the adapter.


If this property is not set, or is 0, then the default adapter for the
machine is used. This may not be appropriate for machines with multiple adapters.


This property can be set in any channel state.


The default property value is 0.
WS_CHANNEL_PROPERTY_MULTICAST_HOPS
Value: 20
A ULONG used with WsCreateChannel or WsGetChannelProperty
for WS_UDP_CHANNEL_BINDING with WS_CHANNEL_TYPE_DUPLEX
to specify the max number of hops that a UDP message can travel.


The default property value is 1.
WS_CHANNEL_PROPERTY_REMOTE_ADDRESS
Value: 21
A WS_ENDPOINT_ADDRESS structure
used with WsGetChannelProperty
for WS_UDP_CHANNEL_BINDING with WS_CHANNEL_TYPE_DUPLEX
to retrieve the endpoint address of the remote party for the channel.


The fields of the returned
WS_ENDPOINT_ADDRESS structure are valid and constant until the channel
is reset or freed. The caller should not modify the values the returned
fields of the WS_ENDPOINT_ADDRESS point to.


This property cannot be retrieved until the channel has reached the open state.


This property is based on the source IP address that is received from
the network, which may be spoofed or tampered with even if using a
secure channel (depending on the network environment).
WS_CHANNEL_PROPERTY_REMOTE_IP_ADDRESS
Value: 22
A SOCKADDR_STORAGE structure
used with WsCreateChannel
for the following types of channels to retrieve the IP address
of the remote party:



This property cannot be retrieved until the channel has begun reading a message.


This property is based on the source IP address that is received from
the network, which may be spoofed or tampered with even if using a
secure channel (depending on the network environment).
WS_CHANNEL_PROPERTY_HTTP_CONNECTION_ID
Value: 23
A pointer to a ULONGLONG used with WsGetChannelProperty
for WS_HTTP_CHANNEL_BINDING with WS_CHANNEL_TYPE_REPLY
to retrieve an identifier that uniquely identifies the client connection.


This property cannot be retrieved until the channel has begun reading a message.


The connection ID uniquely identifies a connection while the
listener object that the channel was accepted from remains open.


A given reply channel instance is in no way correlated with a connection.
Each time the channel is accepted, there may be a different connection ID
(even if the total set of connections has not changed since the last accept).


The connection ID can be used by an application to correlate state with
a HTTP connection.
WS_CHANNEL_PROPERTY_CUSTOM_CHANNEL_CALLBACKS
Value: 24
A WS_CUSTOM_CHANNEL_CALLBACKS structure used with WsCreateChannel or WsCreateChannelForListener for WS_CUSTOM_CHANNEL_BINDING.


This property is used to specify callbacks that
define the implementation of a custom channel.


This property must be specified when WS_CUSTOM_CHANNEL_BINDING is used.
WS_CHANNEL_PROPERTY_CUSTOM_CHANNEL_PARAMETERS
Value: 25
A pointer to an arbitrary sized data type used with WsCreateChannel or WsCreateChannelForListener for WS_CUSTOM_CHANNEL_BINDING.


This property is used to specify parameters used to create the custom
channel implementation.


The size of the property is the size of the data type.


The value of this property will be passed to the
WS_CREATE_CHANNEL_CALLBACK.


If this property is not specified, its value is NULL and size is zero.
WS_CHANNEL_PROPERTY_CUSTOM_CHANNEL_INSTANCE
Value: 26
A void used with WsGetChannelProperty for WS_CUSTOM_CHANNEL_BINDING.


The size of the property is sizeof(void).
The value corresponds to the channel instance value returned by
the WS_CREATE_CHANNEL_CALLBACK.


This property can be used to obtain the underlying channel
instance for a custom channel. This allows a caller to directly
interact with the instance for cases when the existing
set of channel properties or channel functions is insufficient.
WS_CHANNEL_PROPERTY_TRANSPORT_URL
Value: 27
A WS_STRING structure
used with WsGetChannelProperty
for WS_HTTP_CHANNEL_BINDING or WS_TCP_CHANNEL_BINDING for channels created with WsCreateChannelForListener.


This property is used on the server to obtain the URL that was passed
to WsOpenChannel on the client.
This URL may be different than the value in the WS_TO_HEADER
if WsAddressMessage was used. The mapping of the
transport URL to the underlying transport varies by the
WS_CHANNEL_BINDING, as follows:



This property is only available once the channel has
been accepted using WsAcceptChannel.


The caller should pass the address of a WS_STRING when
retrieving this property. The returned string is a fully qualified
URL in encoded form. The returned string is good until the channel
is freed or reset.
WS_CHANNEL_PROPERTY_NO_DELAY
Value: 28
A BOOL used with WsCreateChannel, WsCreateChannelForListener or WsGetChannelProperty or WsSetChannelProperty for WS_TCP_CHANNEL_BINDING.


This property controls the TCP_NODELAY socket option value of the underlying socket.


When this value is FALSE, the Nagle algorithm is used which can
improve throughput by coalescing small messages.


Setting this value to TRUE may decrease latency at the cost of throughput
for small messages.


The default value is FALSE.
WS_CHANNEL_PROPERTY_SEND_KEEP_ALIVES
Value: 29
A BOOL used with WsCreateChannel, WsCreateChannelForListener for WS_TCP_CHANNEL_BINDING.


This property controls the SO_KEEPALIVE socket option value of the underlying socket.


Setting this value to TRUE will cause keep-alive packets to be sent
on the underlying socket, which may help detect when
a remote party is no longer available.


The default value is FALSE.
WS_CHANNEL_PROPERTY_KEEP_ALIVE_TIME
Value: 30
A ULONG used with WsCreateChannel or WsCreateChannelForListener for WS_TCP_CHANNEL_BINDING.


This property is measured in milliseconds.


This property may only be specified when the WS_CHANNEL_PROPERTY_SEND_KEEP_ALIVES property has the value of TRUE.


The value represents the amount of time before sending keep alive packets if the
socket is not in use.


The default value is 2 hours.
WS_CHANNEL_PROPERTY_KEEP_ALIVE_INTERVAL
Value: 31
A ULONG used with WsCreateChannel or WsCreateChannelForListener for WS_TCP_CHANNEL_BINDING.


This property is measured in milliseconds.


This property may only be specified when the WS_CHANNEL_PROPERTY_SEND_KEEP_ALIVES property has the value of TRUE.


After the time specified in WS_CHANNEL_PROPERTY_KEEP_ALIVE_TIME has expired,
the system will begin to send keep alive packets in an attempt to contact
the remote party. This setting controls how often the system will send
another packet (as a retry attempt).


The default value is 1 second.
WS_CHANNEL_PROPERTY_MAX_HTTP_SERVER_CONNECTIONS
Value: 32
A ULONG used with WsCreateChannel for WS_HTTP_CHANNEL_BINDING.


This property specifies the maximum number of connections that a client application
may have against a HTTP server.
Connections may be cached and re-used by other components within the same process accessing the same HTTP server.


The default value is INFINITE (no limit).
WS_CHANNEL_PROPERTY_IS_SESSION_SHUT_DOWN
Value: 33
A BOOL used with WsGetChannelProperty for WS_TCP_CHANNEL_BINDING
or WS_NAMEDPIPE_CHANNEL_BINDING with WS_CHANNEL_TYPE_DUPLEX_SESSION.


This property indicates
whether WsShutdownSessionChannel has been
used to shut down the channel.


The channel must be in WS_CHANNEL_STATE_OPEN or
WS_CHANNEL_STATE_FAULTED state.
WS_CHANNEL_PROPERTY_CHANNEL_TYPE
Value: 34
A WS_CHANNEL_TYPE value
used with WsGetChannelProperty for all channel types
to query the type of the channel.


The channel can be in any WS_CHANNEL_STATE.
WS_CHANNEL_PROPERTY_TRIM_BUFFERED_MESSAGE_SIZE
Value: 35
A ULONG used with WsCreateChannel, WsCreateChannelForListener or
WsGetChannelProperty for WS_TCP_CHANNEL_BINDING,
WS_HTTP_CHANNEL_BINDING, or WS_NAMEDPIPE_CHANNEL_BINDING to control the memory allocation
characteristics for the messages on the channel.


This property specifies the maximum amount of memory the channel will keep
around after a message is reset. If all the
messages a channel sees are all smaller than this size, then allocations
for purposes of buffering the messages will be minimized.


This property may only be specified when buffered input or output has been
specified (either WS_STREAMED_INPUT_TRANSFER_MODE or
WS_STREAMED_OUTPUT_TRANSFER_MODE have not been set).


The default value is 65536.


The WS_UDP_CHANNEL_BINDING always uses the value 65536.
WS_CHANNEL_PROPERTY_ENCODER
Value: 36
A WS_CHANNEL_ENCODER structure used with WsCreateChannel or WsCreateChannelForListener for WS_TCP_CHANNEL_BINDING,
WS_HTTP_CHANNEL_BINDING, or WS_NAMEDPIPE_CHANNEL_BINDING to provide a custom encoding of messages.

This property cannot be used with WS_UDP_CHANNEL_BINDING.
WS_CHANNEL_PROPERTY_DECODER
Value: 37
A WS_CHANNEL_DECODER structure used with WsCreateChannel or WsCreateChannelForListener for WS_TCP_CHANNEL_BINDING,
WS_HTTP_CHANNEL_BINDING, or WS_NAMEDPIPE_CHANNEL_BINDING to provide a custom dencoding of messages.

This property cannot be used with WS_UDP_CHANNEL_BINDING.
WS_CHANNEL_PROPERTY_PROTECTION_LEVEL
Value: 38
A WS_PROTECTION_LEVEL value used with WsGetChannelProperty for any channel type.


This property indicates
the security assurances provided by the channel.


The value of this property depends on the security requirements
requested for the channel.
WS_CHANNEL_PROPERTY_COOKIE_MODE
Value: 39
A WS_COOKIE_MODE value used with WsCreateChannel with WS_HTTP_CHANNEL_BINDING to control how HTTP cookies are handled.


The default value is WS_AUTO_COOKIE_MODE.
WS_CHANNEL_PROPERTY_HTTP_PROXY_SETTING_MODE
Value: 40
A WS_HTTP_PROXY_SETTING_MODE value used with WsCreateChannel with WS_HTTP_CHANNEL_BINDING to control the HTTP proxy settings for the channel.


The default value is WS_HTTP_PROXY_SETTING_MODE_AUTO.
WS_CHANNEL_PROPERTY_CUSTOM_HTTP_PROXY
Value: 41
A WS_CUSTOM_HTTP_PROXY structure used with WsCreateChannel with WS_HTTP_CHANNEL_BINDING to specify the custom custom setting for the HTTP channel. This property must
be specified when WS_CHANNEL_PROPERTY_HTTP_PROXY_SETTING_MODE is set to
WS_HTTP_PROXY_SETTING_MODE_CUSTOM.


The default value is NULL.
WS_CHANNEL_PROPERTY_HTTP_MESSAGE_MAPPING
Value: 42
A WS_HTTP_MESSAGE_MAPPING structure used with WsCreateChannel or WsCreateChannelForListener for WS_HTTP_CHANNEL_BINDING.


This property value controls how an HTTP request or response is mapped into
a message object. See WS_HTTP_MESSAGE_MAPPING for more information.


The default value for this property is a WS_HTTP_MESSAGE_MAPPING structure is as follows:



  • requestMappingOptions: 0

  • requestHeaderMappings: none

  • responseMappingOptions: 0

  • responseHeaderMappings: none



WS_HTTP_MESSAGE_MAPPING fields requestMappingOptions and responseMappingOptions must be 0
unless encoding is set to WS_ENCODING_RAW using channel property WS_CHANNEL_PROPERTY_ENCODING.
WS_CHANNEL_PROPERTY_ENABLE_HTTP_REDIRECT
Value: 43
A BOOL used with WsCreateChannel for WS_HTTP_CHANNEL_BINDING with WS_CHANNEL_TYPE_REQUEST.


This property value controls whether HTTP auto redirection is enabled.


Setting this value to TRUE enables HTTP auto redirection.


The default value is FALSE.
If the WS_CHANNEL_PROPERTY_HTTP_REDIRECT_CALLBACK_CONTEXT property is specified,
this property is ignored.
WS_CHANNEL_PROPERTY_HTTP_REDIRECT_CALLBACK_CONTEXT
Value: 44
A WS_HTTP_REDIRECT_CALLBACK_CONTEXT structure
used with WsCreateChannel for WS_HTTP_CHANNEL_BINDING with WS_CHANNEL_TYPE_REQUEST.


This property value may be specified when more granular control of automatic HTTP redirection is needed.


When this property is set, the specified callback routine will be called with the original endpoint URL
and the new URL that the message is to be forwarded to. Callback return value is used to indicate whether
the redirection should be allowed.
WS_CHANNEL_PROPERTY_FAULTS_AS_ERRORS
Value: 45
A BOOL used with WsCreateChannel, WsSetChannelProperty,
WsGetChannelProperty or WsCreateServiceProxy for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST, or WS_TCP_CHANNEL_BINDING, WS_NAMEDPIPE_CHANNEL_BINDING, and WS_UDP_CHANNEL_BINDING on the client.


When set to TRUE, Channel and Service Model functions return an error code when a fault is received.
If the fault is recognized by this runtime, the corresponding error code is returned,
otherwise WS_E_ENDPOINT_FAULT_RECEIVED is returned. (See Windows Web Services Return Values.) When set to FALSE, WsReceiveMessage
and WsRequestReply return WS_E_ENDPOINT_FAULT_RECEIVED when a fault is received.
The other channel functions return faults as regular messages and'WS_MESSAGE_PROPERTY_IS_FAULT
can be used to distinguish faults from other messages.


When this property is set to TRUE and used with WsCreateChannel or WsSetChannelProperty,
it overrides the following behavior of WS_CHANNEL_PROPERTY_ALLOW_UNSECURED_FAULTS: if the fault is recognized by the
runtime, an unsecured fault will not cause security verification of the fault message to fail even if
WS_CHANNEL_PROPERTY_ALLOW_UNSECURED_FAULTS is set to FALSE. The status of the security verification
can be determined by inspecting WS_MESSAGE_PROPERTY_PROTECTION_LEVEL.
This does not apply to WS_UDP_CHANNEL_BINDING as it does not support security.


When this property is set to FALSE or used with WsCreateServiceProxy or the fault is not recognized
by the runtime, the behavior described in WS_CHANNEL_PROPERTY_ALLOW_UNSECURED_FAULTS applies without
exception.


Regardless of this property value, if an error code is returned as a result of receiving a fault,
WsGetFaultErrorProperty may be used to query the details of the fault from the error object.


This property can be set in any channel state.


The default value is TRUE. If used with WsCreateServiceProxy, this property must be set to TRUE.




Setting this property to TRUE can cause message security verification to be disabled for certain faults.
Unverified faults may not be trustworthy.
WS_CHANNEL_PROPERTY_ALLOW_UNSECURED_FAULTS
Value: 46
A BOOL used with WsCreateChannel, WsSetChannelProperty,
or WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST, or WS_TCP_CHANNEL_BINDING and WS_NAMEDPIPE_CHANNEL_BINDING on the client.


When set to TRUE, unsecured faults received on a secure channel do not cause message security verification to fail. Instead the
fault will be treated as if message security verification succeeded and handled as described in WS_CHANNEL_PROPERTY_FAULTS_AS_ERRORS.
The status of the security verification can be determined by inspecting WS_MESSAGE_PROPERTY_PROTECTION_LEVEL.


When set to FALSE, message security verification of fault messages is handled like the verification of any other message.


WS_CHANNEL_PROPERTY_FAULTS_AS_ERRORS may override this property for faults recognized by this runtime.


This property only applies to message-level security verification and has no impact on transport security.


This property can be set in any channel state.


The default value is FALSE.


Setting this property to TRUE causes message security verification for faults to be disabled. Unsecured faults may not be trustworthy.
WS_CHANNEL_PROPERTY_HTTP_SERVER_SPN
Value: 47
A WCHAR pointer
used with WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST.



Returns the Server Principal Name of the remote endpoint used for the last failed request. There is no guarantee that this property is
available. The following are the necessary (but not always sufficient) conditions for this property to be present:

  • The channel sent a request.

  • The request failed due to mismatched HTTP header authentication schemes. See WS_HTTP_HEADER_AUTH_SECURITY_BINDING.

  • The remote endpoint supports the "Nego2" authentication scheme.




This property is only available on Windows 7 and above.
WS_CHANNEL_PROPERTY_HTTP_PROXY_SPN
Value: 48
A WCHAR pointer used with WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING and WS_CHANNEL_TYPE_REQUEST.



Returns the Server Principal Name of the HTTP proxy server used for the last failed request. There is no guarantee that this property is
available. The following are the necessary (but not always sufficient) conditions for this property to be present:

  • The channel sent a request.

  • The request failed due to mismatched HTTP header authentication schemes. See WS_HTTP_HEADER_AUTH_SECURITY_BINDING.

  • The HTTP proxy server supports the "Nego2" authentication scheme.




This property is only available on Windows 7 and above.
WS_CHANNEL_PROPERTY_MAX_HTTP_REQUEST_HEADERS_BUFFER_SIZE
Value: 49
A ULONG used with WsCreateChannelForListener or
WsGetChannelProperty for WS_HTTP_CHANNEL_BINDING
with WS_CHANNEL_TYPE_REPLY. This value is a limit as to how big the headers
of an HTTP request being received can be. The limit specifies the maximum size
of the HTTP request headers in bytes.


This property limits the amount of memory
that the WS_HTTP_CHANNEL_BINDING with WS_CHANNEL_TYPE_REPLY
will allocate in order to receive HTTP request headers. When receiving, the entire HTTP request
headers are read into a buffer before processing.


The default value is 65536.

Requirements

Requirement Value
Minimum supported client Windows 7 [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 R2 [desktop apps | UWP apps]
Header webservices.h