.\"
-.\" Copyright (c) 2008 Apple Inc. All rights reserved.
+.\" Copyright (c) 2008-2015 Apple Inc. All rights reserved.
.\"
.\" @APPLE_LICENSE_HEADER_START@
.\"
set this flag internally.
.It EV_EOF
Filters may set this flag to indicate filter-specific EOF condition.
+.It EV_OOBAND
+Read filter on socket may set this flag to indicate the presence of out of
+band data on the descriptor.
.It EV_ERROR
See
.Sx RETURN VALUES
.Va data
contains the number of bytes of protocol data available to read.
.Pp
+The presence of EV_OOBAND in
+.Va flags ,
+indicates the presence of out of band data on the socket
+.Va data
+equal to the potential number of OOB bytes availble to read.
+.Pp
If the read direction of the socket has shutdown, then the filter
also sets EV_EOF in
.Va flags ,