The new socket ioctl opcodes for Windows Sockets 2 are summarized in the following table. See WSAIoctl for detailed information on these opcodes. The WSAIoctl function also supports all the ioctl opcodes specified in ioctlsocket. Theother new protocol-specific ioctl opcodes can be found in the Protocol-specific Annex (a separate document included with the Platform SDK).
| Opcode | Input Type | Output Type | Meaning |
|---|---|---|---|
| SIO_ASSOCIATE _HANDLE |
companion API dependent | <not used> | Associate the socket with the specified handle of a companion interface. |
| SIO_ENABLE _CIRCULAR_QUEUEING |
<not used> | <not used> | Circular queuing is enabled. |
| SIO_FIND_ROUTE | struct sockaddr | <not used> | Request the route to the specified address to be discovered. |
| SIO_FLUSH | <not used> | <not used> | Discard current contents of the sending queue. |
| SIO_GET_BROADCAST _ADDRESS |
<not used> | struct sockaddr | Retrieve the protocol-specific broadcast address to be used in sendto/WSASendTo. |
| SIO_GET_QOS | <not used> | QOS | Retrieve current flow specification(s) for the socket. |
| SIO_GET_GROUP_QOS | <not used> | QOS | Reserved for future use with socket groups: Retrieve current group flow specification(s) for the group this socket belongs to. |
| SIO_MULTIPOINT _LOOPBACK |
BOOL | <not used> | Control whether data sent in a multipoint session will also be received by the same socket on the local host. |
| SIO_MULTICAST _SCOPE |
int | <not used> | Specify the scope over which multicast transmissions will occur. |
| SIO_SET_QOS | QOS | <not used> | Establish new flow specification(s) for the socket. |
| SIO_SET_GROUP_QOS | QOS | <not used> | Reserved for future use with socket groups: Establish new group flow specification(s) for the group this socket belongs to. |
| SIO_TRANSLATE _HANDLE |
int | companion API dependent | Obtain a corresponding handle for socket s that is valid in the context of a companion interface. |
| SIO_ROUTING _INTERFACE_QUERY |
SOCKADDR | SOCKADDR | Obtain the address of local interface which should be used to send to the specified address |
| SIO_ROUTING _INTERFACE_CHANGE |
SOCKADDR | <not used> | Request notification of changes in information reported via SIO_ROUTING_INTERFACE_QUERY for the specified address |
| SIO_ADDRESS _LIST_QUERY |
<not used> | SOCKET _ADDRESS _LIST |
Obtain the list of addresses to which application can bind. |
| SIO_ADDRESS _LIST_CHANGE |
<not used> | <not used> | Request notification of changes in information reported via SIO_ADDRESS_LIST_QUERY |