T_RCVUDERR(3N) INTERACTIVE UNIX System T_RCVUDERR(3N)
NAME
t_rcvuderr - receive a unit data error indication
SYNOPSIS
#include <tiuser.h>
int t_rcvuderr(fd, uderr)
int fd;
struct t_uderr *uderr;
DESCRIPTION
This function is used in connectionless mode to receive
information concerning an error on a previously sent data
unit, and should only 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. Fd identifies the local transport end-
point through which the error report will be received, and
uderr points to a t_uderr structure containing the following
members:
struct netbuf addr;
struct netbuf opt;
long error;
Netbuf is described in intro(3). The maxlen [see netbuf in
intro(3)] field of addr and opt must be set before issuing
this function to indicate the maximum size of the buffer for
each.
On return from this call, the addr structure specifies the
destination protocol address of the erroneous data unit; the
opt structure identifies protocol-specific options that were
associated with the data unit; and error specifies a
protocol-dependent error code.
If the user does not care to identify the data unit that
produced an error, uderr may be set to NULL and t_rcvuderr
will simply clear the error indication without reporting any
information to the user.
On failure, t_errno may be set to one of the following:
[TBADF] The specified file descriptor does not
refer to a transport endpoint.
[TNOUDERR] No unit data error indication currently
exists on the specified transport end-
point.
[TBUFOVFLW] The number of bytes allocated for the
incoming protocol address or options is
not sufficient to store the information.
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T_RCVUDERR(3N) INTERACTIVE UNIX System T_RCVUDERR(3N)
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 execu-
tion of this function.
SEE ALSO
intro(3), t_rcvudata(3N), t_sndudata(3N).
Programmer's Guide.
DIAGNOSTICS
The t_rcvuderr function returns 0 on successful completion
and -1 on failure, and t_errno is set to indicate the error.
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