T_RCVCONNECT(3N) INTERACTIVE UNIX System T_RCVCONNECT(3N)
NAME
t_rcvconnect - receive the confirmation from a connect
request
SYNOPSIS
#include <tiuser.h>
int t_rcvconnect(fd, call)
int fd;
struct t_call *call;
DESCRIPTION
This function enables a calling transport user to determine
the status of a previously sent connect request and is used
in conjunction with t_connect to establish a connection in
asynchronous mode. The connection will be established on
successful completion of this function.
Fd identifies the local transport endpoint where communica-
tion will be established, and call contains information
associated with the newly established connection. Call
points to a t_call structure which contains the following
members:
struct netbuf addr;
struct netbuf opt;
struct netbuf udata;
int sequence;
Netbuf is described in intro(3). In call, addr returns the
protocol address associated with the responding transport
endpoint, opt presents any protocol-specific information
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 [see netbuf in intro(3)] field of each argument
must be set before issuing this function to indicate the
maximum size of the buffer for each. However, call may be
NULL, in which case no information is given to the user on
return from t_rcvconnect. By default, t_rcvconnect executes
in synchronous mode and waits for the connection to be esta-
blished before returning. On return, the addr, opt, and
udata fields reflect values associated with the connection.
If O_NDELAY is set (via t_open or fcntl), t_rcvconnect exe-
cutes in asynchronous mode and reduces to a poll for exist-
ing connect confirmations. If none are available,
t_rcvconnect fails and returns immediately without waiting
for the connection to be established. (See TNODATA below.)
t_rcvconnect must be re-issued at a later time to complete
the connection establishment phase and retrieve the
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T_RCVCONNECT(3N) INTERACTIVE UNIX System T_RCVCONNECT(3N)
information returned in call.
On failure, t_errno may be set to one of the following:
[TBADF] The specified file descriptor does not
refer to a transport endpoint.
[TBUFOVFLW] The number of bytes allocated for an
incoming argument is not sufficient to
store the value of that argument and the
connect information to be returned in
call will be discarded. The provider's
state, as seen by the user, will be
changed to DATAXFER.
[TNODATA] O_NDELAY was set, but a connect confir-
mation has not yet arrived.
[TLOOK] An asynchronous event has occurred on
this transport connection and requires
immediate attention.
[TNOTSUPPORT] This function is not supported by the
underlying transport provider.
[TSYSERR] A system error has occurred during exe-
cution of this function.
SEE ALSO
intro(3), t_accept(3N), t_bind(3N), t_connect(3N),
t_listen(3N), t_open(3N).
Programmer's Guide.
DIAGNOSTICS
t_rcvconnect returns 0 on success and -1 on failure, and
t_errno is set to indicate the error.
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