T_SNDDIS(3N)                         SysV                         T_SNDDIS(3N)



NAME
     t_snddis - send user-initiated disconnect request

SYNOPSIS
     #include <tiuser.h>

     int t_snddis(fd, call)
     int fd;
     struct t_call *call;

DESCRIPTION
     This function is used to initiate an abortive release on an already
     established connection or to reject a connect request.  fd identifies the
     local transport endpoint of the connection, and call specifies
     information associated with the abortive release.  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).  The values in call have different
     semantics, depending on the context of the call to t_snddis.  When
     rejecting a connect request, call must be non-NULL and contain a valid
     value of sequence to uniquely identify the rejected connect indication to
     the transport provider.  The addr and opt fields of call are ignored.  In
     all other cases, call need only be used when data is being sent with the
     disconnect request.  The addr, opt, and sequence fields of the t_call
     structure are ignored.  If the user does not wish to send data to the
     remote user, the value of call may be NULL.

     udata specifies the user data to be sent to the remote user.  The amount
     of user data must not exceed the limits supported by the transport
     provider as returned by t_open or t_getinfo.  If the len field of udata
     is zero, no data will be sent to the remote user.

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

ERRORS
     On failure, t_errno may be set to one of the following:

     [TBADF]            The specified file descriptor does not refer to a
                        transport endpoint.

     [TOUTSTATE]        The function was issued in the wrong sequence.  The
                        transport provider's outgoing queue may be flushed, so
                        data may be lost.

     [TBADDATA]         The amount of user data specified was not within the
                        bounds allowed by the transport provider.  The
                        transport provider's outgoing queue will be flushed,
                        so data may be lost.

     [TBADSEQ]          An invalid sequence number was specified, or a NULL
                        call structure was specified when rejecting a connect
                        request.  The transport provider's outgoing queue will
                        be flushed, so data may be lost.

     [TLOOK]            An asynchronous event has occurred on this transport
                        endpoint 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.

SEE ALSO
     intro(3), t_connect(3N), t_getinfo(3N), t_listen(3N), t_open(3N)
     Programming with the SysV Transport Interface