ultrix man page for t_rcvuderr

t_rcvuderr(3xti)														  t_rcvuderr(3xti)

Name
       t_rcvuderr - receive a unit error indication

Syntax
       #include <xti.h>

       int t_rcvuderr(fd, uderr)
       int fd;
       struct t_uderr *uderr;

Arguments
       fd	 Identifies the local transport endpoint through which the error report is received.

       uderr	 Points to a t_uderr structure containing the following members:
		 struct netbuf addr;
		 struct netbuf opt;
		 long error;

		 On return from this call, the members have the following meanings:

		 addr	     Specifies the destination protocol address of the erroneous data unit.

		 opt	     Identifies protocol-specific options that were associated with the data unit.

		 error	     Specifies a protocol-dependent error code.

Description
       This function is used in connectionless mode to receive information concerning an error on a previously sent data unit and should be issued
       following a unit data error indication. It informs the transport user that a data unit with a specific  destination  address  and  protocol
       options produced an error.

       The maxlen field of addr and opt must be set before issuing this function to indicate the maximum size of the buffer for each.

       If  the	user does not care to identify the data unit that produced an error, uderr may be set to NULL, and simply clears the error indica-
       tion without reporting any information to the user.

       ----------------------------------------------
       Parameters	    Before Call   After Call
       ----------------------------------------------
       fd		    x		  /
       uderr->addr.maxlen   x		  /
       uderr->addr.len	    /		  x
       uderr->addr.buf	    x		  (x)
       uderr->opt.maxlen    x		  /
       uderr->opt.len	    /		  x
       uderr->opt.buf	    x		  (x)
       uderr->error	    /		  x
       ----------------------------------------------

Return Values
       Upon successful completion, a value of 0 is returned. On failure,  a value of -1 is returned, and t_errno is set to indicate the error.

Diagnostics
       On failure, t_errno is set to one of the following:

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

       [TNOUDERR]	   No unit data error indication currently exists on the specified transport endpoint.

       [TBUFOVFLW]	   The number of bytes allocated for the incoming protocol address or options is not sufficient to store the  information.
			   The unit data error information to be returned in uderr will be discarded.

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

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

See Also
       t_rcvudata(3xti), t_sndudata(3xti)

																  t_rcvuderr(3xti)