t_sndrel(3N)

NAME

t_sndrel − initiate an orderly release

SYNOPSIS

cc [ flag ... ] file ... −lnsl [ library ... ]

#include <xti.h>

int t_sndrel(int fd);

DESCRIPTION

This routine is part of the XTI interfaces which evolved from the TLI interfaces. XTI represents the future evolution of these interfaces. However, TLI interfaces are supported for compatibility. When using a TLI routine that has the same name as an XTI routine, a different header file, tiuser.h , must be used. Refer to the section, TLI COMPATIBILITY , for a description of differences between the two interfaces.

This function is used to initiate an orderly release of a transport connection and indicates to the transport provider that the transport user has no more data to send. fd identifies the local transport endpoint where the connection exists. After issuing t_sndrel(), the user may not send any more data over the connection. However, a user may continue to receive data if an orderly release indication has not been received.

This function is an optional service of the transport provider, and is only supported if the transport provider returned service type T_COTS_ORD on t_open(3N) or t_getinfo(3N).

VALID STATES

Legitimate states (see t_getstate(3N)) for a call to this routine are:

T_DATAXFER

T_INREL

RETURN VALUES

t_sndrel() returns:

0 On success.

−1 On failure.

On failure, t_errno is set to indicate the error, and possibly errno is set.

ERRORS

On failure, t_errno is set to one of the following:

TBADF The specified file descriptor does not refer to a transport endpoint.

TFLOW O_NONBLOCK was set, but the flow control mechanism prevented the transport provider from accepting the function at this time.

TLOOK An asynchronous event has occurred on this transport endpoint and requires immediate attention.

TNOTSUPPORT This function is not supported by the underlying transport provider.

TOUTSTATE The communications endpoint referenced by fd or resfd is not in one of the states in which a call to this function is valid.

TPROTO This error indicates that a communication problem has been detected between XTI and the transport provider for which there is no other suitable XTI t_errno value.

TSYSERR A system error has occurred during execution of this function; errno will be set to the specific error.

TLI COMPATIBILITY

The XTI and TLI interface definitions have common names but use different header files. This, and other semantic differences between the two interfaces are described in the subsections below.

Interface Header

The XTI interfaces use the header file, xti.h . TLI interfaces should not use this header. They should use the header:

#include <tiuser.h>

Error Description Values

The t_errno values that can be set by the XTI interface and cannot be set by the TLI interface are:

TPROTO

TLOOK

TOUTSTATE

Notes

Whenever this function fails with t_error set to TFLOW , O_NONBLOCK must have been set.

For more information refer to the Transport Interfaces Programming Guide.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
MT-Level	MT-Safe

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