Platform SDK: DLC/NetBIOS

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, *PACTION_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.

String	Meaning
M000	All transports
MNBF	NBF
MABF	AsyBEUI
MXNS	XNS

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.

Requirements

  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Requires Windows 95 or later.
  Header: Declared in Nb30.h.

ACTION_HEADER

Members

Remarks

Requirements

See Also