T_UNITDATA_IND(D7tpi)

T_UNITDATA_IND -- Unitdata Indication

Synopsis

This message consists of one M_PROTO message block followed by zero or more M_DATA message blocks where each M_DATA message block contains at least one byte of data. The format of the M_PROTO message block is as follows:

   struct T_unitdata_ind {
   	long 	PRIM_type;		/* always T_UNITDATA_IND */
   	long	SRC_length;	/* source addr length  -   */
   	long	SRC_offset;	/* source addr offset */
   	long	OPT_length;	/* options length -    */
   	long	OPT_offset;	/* options offset */
   }

Description

This primitive indicates to the transport user that a datagram has been received from the specified source address.

Parameters

PRIM_type: identifies the primitive type.
SRC_length: is the length of the source address.
SRC_offset: is the offset (from the beginning of the M_PROTO message block) where the source address begins.
OPT_length: is the length the requested options associated with the primitive.
OPT_offset: is the offset (from the beginning of the M_PROTO message block) the requested options associated with the primitive.

The proper alignment of the source address and options in the M_PROTO message block is not guaranteed.

Modes

Only connectionless-mode.

Originator

Transport provider.

Notices

Hardware constraints

None

Applicability

N/A

Backward compatibility

UnixWare-specific TPI Message Formats

Forward compatibility

N/A