TRCVCONNECT(3N-SVR4)RISC/os Reference ManualRCVCONNECT(3N-SVR4)



NAME
     t_rcvconnect - receive the confirmation from a connect
          request

SYNOPSIS
     #include <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 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 trcvconnect.  By default, trcvconnect 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 or O_NONBLOCK is set (via t_open or fcntl),
     trcvconnect executes in asynchronous mode, and reduces to a
     poll for existing connect confirmations.  If none are avail-
     able, trcvconnect fails and returns immediately without
     waiting for the connection to be established.  (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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TRCVCONNECT(3N-SVR4)RISC/os Reference ManualRCVCONNECT(3N-SVR4)



     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 or O_NONBLOCK was set, but a
                         connect confirmation 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).

DIAGNOSTICS
     trcvconnect returns 0 on success  and  -1  on  failure  and
     t_errno is set to indicate the error.





















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