Manpage of T_DATA_IND

T_DATA_IND

Section: Transport Provider Interface (TPI) (7)
Updated: 2008-10-31
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NAME

T_DATA_IND - Data 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_data_ind {
    t_scalar_t   PRIM_type;      /* Always T_DATA_IND */
    t_scalar_t   MORE_flag;
};

DESCRIPTION

This primitive indicates to the transport user that this message contains a transport interface data unit. One or more transport interface data units form a transport service data unit. This primitive has a mechanism which indicates the beginning and end of a transport service data unit. However, not all transport providers support the concept of a transport service data unit.

PARAMETERS

PRIM_type: identifies the primitive type.
MORE_flag: when greater than zero, indicates that the next T_DATA_IND primitive is also part of this transport service data unit.

RULES

If a TSDU spans multiple T_DATA_IND message blocks, then an ETSDU may be placed in between two T_DATA_IND message blocks. Once an ETSDU is started, then the ETSDU must be completed before any T_DATA_IND message blocks defining a TSDU is resumed.

MODES

Only connection-mode.

ORIGINATOR

Transport provider.

HISTORY

The Transport Provider Interface first appeared in SVR 4[1].

CONFORMANCE

This interface conforms to TPI Version 2, Draft 2[2].

REFERENCES

[1]: SVR 4, UNIX® System V Release 4 Programmer's Manual, 1990, (Englewood Cliffs, New Jersey), AT&T UNIX System Laboratories, Inc., Prentice Hall.
[2]: TPI Revision 2.0.0, Open Group CAE Specification: Transport Provider Interface (TPI) Specification, Revision 2.0.0, Draft 2, 1999, (Berkshire, UK), OpenGroup, Open Group Publication. <http://www.opengroup.org/onlinepubs/>
[3]: Magic Garden, The Magic Garden Explained: The Internals of UNIX® System V Release 4 / An Open Systems Design, 1994, (Australia), B. Goodheart, J. Cox, Prentice Hall. [ISBN 0-13-098138-9]
[4]: Advanced Programming in the UNIX®Environment, 15th edition, December 1997, (Reading, Massachusetts), W. R. Stevens, Addison Wesley. [ISBN 0-201-56317-7]

TRADEMARKS

OpenSS7tm: is a trademark of OpenSS7 Corporation.
Linux®: is a registered trademark of Linus Torvalds.
UNIX®: is a registered trademark of The Open Group.
Solaris®: is a registered trademark of Sun Microsystems.

Other trademarks are the property of their respective owners.

IDENTIFICATION

OpenSS7 XTI/TLI Networking: Package strxnet version 0.9.2.12 released 2008-10-31.

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Time: 16:48:15 GMT, May 21, 2013