t_rcvconnect(3N) t_rcvconnect(3N)
NAME
trcvconnect - receive the confirmation from a connect request
SYNOPSIS
#include <sys/tiuser.h>
int trcvconnect(int fd, struct tcall *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
tconnect to establish a connection in asynchronous mode. The connec-
tion will be established on successful completion of this function.
fd identifies the local transport endpoint where communication will be
established, and call contains information associated with the newly
established connection. call points to a tcall structure which con-
tains the following members:
struct netbuf addr;
struct netbuf opt;
struct netbuf udata;
int sequence;
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 dur-
ing connection establishment, and sequence has no meaning for this
function.
The maxlen 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 trcvconnect. By default, trcvconnect executes in syn-
chronous 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 ONDELAY or ONONBLOCK is set (via topen or fcntl), trcvconnect
executes in asynchronous mode, and reduces to a poll for existing con-
nect confirmations. If none are available, trcvconnect fails and
returns immediately without waiting for the connection to be estab-
lished. (See TNODATA below.) trcvconnect must be re-issued at a later
time to complete the connection establishment phase and retrieve the
information returned in call.
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t_rcvconnect(3N) t_rcvconnect(3N)
ERRORS
On failure, terrno 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 ONDELAY or ONONBLOCK 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 execution of this
function.
DIAGNOSTICS
trcvconnect returns 0 on success and -1 on failure and terrno is set
to indicate the error.
SEE ALSO
taccept(3N), tbind(3N), tconnect(3N), tlisten(3N), topen(3N).
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