t_rcvconnect(3NSL) Networking Services Library Functions t_rcvconnect(3NSL)NAMEt_rcvconnect - receive the confirmation from a connection request
SYNOPSIS
#include <xti.h>
int t_rcvconnect(int fd, struct t_call *call);
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.
This function enables a calling transport user to determine the status
of a previously sent connection request and is used in conjunction with
t_connect(3NSL) to establish a connection in asynchronous mode, and to
complete a synchronous t_connect(3NSL) call that was interrupted by a
signal. The connection will be established on successful completion of
this function.
The argument fd identifies the local transport endpoint where communi‐
cation will be established, and call contains information associated
with the newly established connection. The argument call points to a
t_call structure which contains the following members:
struct netbuf addr;
struct netbuf opt;
struct netbuf udata;
int sequence;
In call, addr returns the protocol address associated with the respond‐
ing transport endpoint, opt presents any options associated with the
connection, udata points to optional user data that may be returned by
the destination transport user during connection establishment, and
sequence has no meaning for this function.
The maxlen field of each argument must be set before issuing this func‐
tion to indicate the maximum size of the buffer for each. However,
maxlen can be set to zero, in which case no information to this spe‐
cific argument is given to the user on the return from t_rcvconnect().
If call is set to NULL, no information at all is returned. By
default, t_rcvconnect() executes in synchronous mode and waits for the
connection to be established before returning. On return, the addr, opt
and udata fields reflect values associated with the connection.
If O_NONBLOCK is set by means of t_open(3NSL) or fcntl(2), t_rcvcon‐
nect() executes in asynchronous mode, and reduces to a poll for exist‐
ing connection confirmations. If none are available, t_rcvconnect()
fails and returns immediately without waiting for the connection to be
established. See TNODATA below. In this case, t_rcvconnect() must be
called again to complete the connection establishment phase and
retrieve the information returned in call.
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_OUTCON.
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 an incoming argument
(maxlen) is greater than 0 but not sufficient to store
the value of that argument, and the connection informa‐
tion to be returned in call will be discarded. The
provider's state, as seen by the user, will be changed
to T_DATAXFER.
TLOOK An asynchronous event has occurred on this transport
connection and requires immediate attention.
TNODATA O_NONBLOCK was set, but a connection confirmation has
not yet arrived.
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 value TPROTO can be set by the XTI interface but not by the
TLI interface.
A t_errno value that this routine can return under different circum‐
stances than its XTI counterpart is TBUFOVFLW. It can be returned even
when the maxlen field of the corresponding buffer has been set to zero.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│MT Level │Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOfcntl(2), t_accept(3NSL), t_alloc(3NSL), t_bind(3NSL), t_connect(3NSL),
t_listen(3NSL), t_open(3NSL), t_optmgmt(3NSL), attributes(5)SunOS 5.10 7 May 1998 t_rcvconnect(3NSL)
