t_snddis(3N)          (Networking Support Utilities)           t_snddis(3N)


   NAME
         tsnddis - send user-initiated disconnect request

   SYNOPSIS
         #include <tiuser.h>

         int tsnddis (int fd, struct tcall *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
         tcall structure that 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 tsnddis.  When
         rejecting a connect request, call must be non-NULL and contain a
         valid value of sequence to identify uniquely 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 tcall 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 in the discon field of the info
         argument of topen or tgetinfo.  If the len field of udata is zero,
         no data will be sent to the remote user.

         On failure, terrno 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.



   7/91                                                                 Page 1

   t_snddis(3N)          (Networking Support Utilities)           t_snddis(3N)


         [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), tconnect(3N), tgetinfo(3N), tlisten(3N), topen(3N).
         Programmer's Guide: Networking Interfaces.

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






























   Page 2                                                                 7/91