Definition of Action header

ACTION_HEADER
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

NCB