T_RCVRELDATA(3NSL)T_RCVRELDATA(3NSL)NAMEt_rcvreldata - receive an orderly release indication or confirmation
containing user data
SYNOPSIS
#include <xti.h>
int t_rcvreldata(int fd, struct t_discon *discon);
DESCRIPTION
This function is used to receive an orderly release indication for the
incoming direction of data transfer and to retrieve any user data sent
with the release. The argument fd identifies the local transport end‐
point where the connection exists, and discon points to a t_discon
structure containing the following members:
struct netbuf udata;
int reason;
int sequence;
After receipt of this indication, the user may not attempt to receive
more data by means of t_rcv(3NSL) or t_rcvv(3NSL) Such an attempt
will fail with t_error set to TOUTSTATE. However, the user may con‐
tinue to send data over the connection if t_sndrel(3NSL) or t_sndrel‐
data (3N) has not been called by the user.
The field reason specifies the reason for the disconnection through a
protocol-dependent reason code, and udata identifies any user data
that was sent with the disconnection; the field sequence is not used.
If a user does not care if there is incoming data and does not need to
know the value of reason, discon may be a null pointer, and any user
data associated with the disconnection will be discarded.
If discon→udata.maxlen is greater than zero and less than the length
of the value, t_rcvreldata() fails with t_errno set to TBUFOVFLW.
This function is an optional service of the transport provider, only
supported by providers of service type T_COTS_ORD. The flag T_ORDREL‐
DATA in the info→flag field returned by t_open(3NSL) or t_get‐
info(3NSL) indicates that the provider supports orderly release user
data; when the flag is not set, this function behaves like
t_rcvrel(3NSL) and no user data is returned.
This function may not be available on all systems.
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_OUTREL.
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.
TBUFOVFLW
The number of bytes allocated for incoming data (maxlen)
is greater than 0 but not sufficient to store the data,
and the disconnection information to be returned in
discon will be discarded. The provider state, as seen by
the user, will be changed as if the data was success‐
fully retrieved.
TLOOK
An asynchronous event has occurred on this transport
endpoint and requires immediate attention.
TNOREL
No orderly release indication currently exists on the
specified transport endpoint.
TNOTSUPPORT
Orderly release is not supported by the underlying
transport 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
In the TLI interface definition, no counterpart of this routine was
defined.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌───────────────┬─────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├───────────────┼─────────────────┤
│MT Level │ Safe │
└───────────────┴─────────────────┘
SEE ALSOt_getinfo(3NSL), t_open(3NSL), t_sndreldata(3NSL), t_rcvrel(3NSL),
t_sndrel(3NSL), attributes(5)NOTES
The interfaces t_sndreldata(3NSL) and t_rcvreldata() are only for use
with a specific transport called "minimal OSI," which is not available
on the Solaris platform. These interfaces are not available for use in
conjunction with Internet Transports (TCP or UDP).
May 7, 1998 T_RCVRELDATA(3NSL)
