t_rcvdis(3NSL)					       Networking Services Library Functions					    t_rcvdis(3NSL)

NAME

       t_rcvdis - retrieve information from disconnection

SYNOPSIS

       #include <xti.h>

       int t_rcvdis(int fd, struct t_discon *discon);

DESCRIPTION

       This  routine is part of the XTI interfaces which evolved from the TLI interfaces. XTI represents the future evolution of these interfaces.
       However, TLI interfaces are supported for compatibility. When using a TLI routine that has the same name as an XTI routine,  the   tiuser.h
       header file must be used.  Refer to the	TLI COMPATIBILITY section for a description of differences between the two interfaces.

       This  function  is used to identify the cause of a disconnection and to retrieve any user data sent with the disconnection. The argument fd
       identifies the local transport endpoint where the connection existed, and discon points to a t_discon structure	containing  the  following
       members:

       struct netbuf udata;
       int reason;
       int sequence;

       The  field  reason specifies the reason for the disconnection through a protocol-dependent reason code, udata identifies any user data that
       was sent with the disconnection, and sequence may identify an outstanding connection indication with which the disconnection is associated.
       The  field  sequence  is  only meaningful when t_rcvdis() is issued by a passive transport user who has executed one or more t_listen(3NSL)
       functions and is processing the resulting connection indications. If a disconnection indication occurs, sequence can be	used  to  identify
       which of the outstanding connection indications is associated with the disconnection.

       The   maxlen  field of  udata may be set to zero, if the user does not care about incoming data. If, in addition, the user does not need to
       know the value of  reason or  sequence, discon may be set to  NULL and any user data associated with the disconnection indication shall	be
       discarded.  However,  if  a  user has retrieved more than one outstanding connection indication by means of t_listen(3NSL), and discon is a
       null pointer, the user will be unable to identify with which connection indication the disconnection is associated.

RETURN VALUES

       Upon successful completion, a value of  0 is returned.  Otherwise, a value of  -1 is returned and t_errno is set to indicate an error.

VALID STATES

       T_DATAXFER, T_OUTCON, T_OUTREL, T_INREL, T_INCON(ocnt > 0).

ERRORS

       On failure, t_errno is 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 incoming data (maxlen) is greater than  0 but not sufficient to store the data.  If fd is
		       a passive endpoint with ocnt > 1, it remains in state  T_INCON; otherwise, the endpoint state is set to	T_IDLE.

       TNODIS	       No disconnection indication currently exists on the specified transport endpoint.

       TNOTSUPPORT     This function is not supported by the underlying transport provider.

       TOUTSTATE       The communications endpoint referenced by  fd is not in one of the states in which a call to this function is valid.

       TPROTO	       This  error indicates that a communication problem has been detected between XTI and the transport provider for which there
		       is no other suitable XTI error (t_errno).

       TSYSERR	       A system error has occurred during execution of this function.

TLI COMPATIBILITY

       The XTI and TLI interface definitions have common names but use different header files. This, and other semantic  differences  between  the
       two interfaces are described in the subsections below.

   Interface Header
       The XTI interfaces use the header file, xti.h. TLI interfaces should not use this header.  They should use the header:

		 #include <tiuser.h>

   Error Description Values
       The t_errno values TPROTO and TOUTSTATE can be set by the XTI interface but not by the TLI interface.

       A failure return, and a t_errno value that this routine can set under different circumstances than its XTI counterpart is TBUFOVFLW. It can
       be returned even when the maxlen field of the corresponding buffer has been set to zero.

ATTRIBUTES

       See attributes(5)  for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       t_alloc(3NSL), t_connect(3NSL), t_listen(3NSL), t_open(3NSL), t_snddis(3NSL), attributes(5)

SunOS 5.10							    7 May 1998							    t_rcvdis(3NSL)