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 Platform SDK).
| Value | Type | Meaning | Default | Note |
|---|---|---|---|---|
| SO_GROUP_ID | GROUP | Reserved for future use with socket groups: The identifier of the group to which this socket belongs. | NULL | get only |
| SO_GROUP _PRIORITY |
int | Reserved for future use with socket groups: The relative priority for sockets that are part of a socket group. | 0 | |
| SO_MAX_MSG _SIZE |
int | Maximum outbound (send) size of a message for message-oriented socket types. There is no provision for finding out the maximum inbound message size. 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 |