T_SNDREL(3NSL)T_SNDREL(3NSL)NAMEt_sndrel - initiate an orderly release
SYNOPSIS
#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, the tiuser.h
header file must be used. Refer to the TLI COMPATIBILITY section for
a description of differences between the two interfaces.
For transport providers of type T_COTS_ORD, this function is used to
initiate an orderly release of the outgoing direction of data transfer
and indicates to the transport provider that the transport user has no
more data to send. The argument fd identifies the local transport end‐
point where the connection exists. After calling 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. For transport providers of types other than T_COTS_ORD, this
function fails with error TNOTSUPPORT.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a
value of -1 is returned and t_errno is set to indicate an error.
VALID STATES
T_DATAXFER, T_INREL.
ERRORS
On failure, t_errno is set to one of the following:
TBADF
The specified file descriptor does not refer to a trans‐
port endpoint.
TFLOW
O_NONBLOCK was set, but the flow control mechanism pre‐
vented the transport provider from accepting the func‐
tion 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 trans‐
port provider.
TOUTSTATE
The communications endpoint referenced by fd 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 error (t_errno).
TSYSERR
A system error has occurred during execution of this
function.
TLI COMPATIBILITY
The XTI and TLI interface definitions have common names but use differ‐
ent 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.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌───────────────┬─────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├───────────────┼─────────────────┤
│MT Level │ Safe │
└───────────────┴─────────────────┘
SEE ALSOt_error(3NSL), t_getinfo(3NSL), t_open(3NSL), t_rcvrel(3NSL),
attributes(5)
May 7, 1998 T_SNDREL(3NSL)
