ACTION_HEADER info Overview Group

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:

action_code

Specifies the action.

reserved

Reserved.

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.