Summary of New Socket Options

The new socket options for Windows Sockets 2 are summarized in the following table. See getsockopt and setsockopt for detailed information on these options. The other new protocol-specific socket options can be found in the Protocol-specific Annex (a separate document included with the Win32 SDK).

Value
Type
Meaning
Default
Note
SO_GROUP_ID
GROUP
The identifier of the group to which this socket belongs.
NULL
get only
SO_GROUP
_PRIORITY
int
The relative priority for sockets that are part of a socket group.
0

SO_MAX_MSG
_SIZE
int
Maximum size of a message for message-oriented socket types. Has no meaning for stream-oriented sockets.
Implementation dependent
get only
SO_PROTOCOL
_INFO
struct WSAPROTOCOL_INFO
Description of protocol info for protocol that is bound to this socket.
protocol dependent
get only
PVD_CONFIG
char FAR *
An opaque data structure object containing configuration information of the service provider.
Implementation dependent

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