The ACTION_HEADER structure contains information about an action. This action is an extension to the standard transport interface.
typedef struct _ACTION_HEADER {
ULONG transport_id;
USHORT action_code;
USHORT reserved;
} ACTION_HEADER;
Members
transport_id
Specifies the transport provider. This member can be used to check the validity of the request by the transport.
This member is always a four-character string. All strings starting with the letter M are reserved, as shown in the following example:
| String | Meaning |
| M000 | All transports |
| MNBF | NBF |
| MABF | AsyBEUI |
| MXNS | XNS |
action_code
Specifies the action.
reserved
Reserved.
Remarks
The scope of the action is determined by the ncb_lsn and ncb_num members of the NCB structure, as follows:
| ncb_lsn = 0 | ncb_lsn != 0 | |
| ncb_num = 0 | Action applies to control channel associated with the valid LAN adapter. | Action applies to connection identifier associated with the valid local session number. |
| ncb_num != 0 | Action applies to address associated with the valid LAN adapter. | Illegal combination. |
See Also