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+.TH nl\-pktloc-lookup 8 "27 October 2010" "libnl"
+.LO 1
+.SH NAME
+nl\-pktloc\-lookup - Lookup packet location definitions
+.SH SYNOPSIS
+.B nl\-pktloc\-lookup
+.I name
+.br
+.B nl\-pktloc\-lookup \-\-list
+
+.SH DESCRIPTION
+.PP
+nl\-pktloc\-lookup searches the packet location database for a matching
+entry. It is used to resolve packet location aliases to their definition,
+i.e. alignment, layer, offset, and mask.
+
+.SH OPTIONS
+.TP
+.BR \-\^h " or " \-\-help
+Print help text to console and exit.
+.TP
+.BR \-\^v " or " \-\-version
+Print versioning information to console and exit.
+.TP
+.BR \-\^l " or " \-\-list
+List all packet location definitions.
+.TP
+.BR \-\-u32=VALUE
+Prints the packet location definition in a special format that is
+understood by iproute2's u32 selector parser. It will output a
+u32 selector which will compare the provided value with the value
+specified by the packet location.
+
+Please note that due to the limitation of u32, it is not possible
+to use packet locations based on the link layer. nl-pktloc-lookup
+will print an error message in this case.
+
+Example:
+  selector=$(nl-pktloc-lookup --u32 22 tcp.sport)
+  tc filter add [...] u32 match $(selector) flowid 1:2
+
+.SH FILES
+.PP
+/etc/libnl/pktloc
+
+.SH AUTHOR
+.PP
+Thomas Graf is the original author and current maintainer of libnl and
+libnl tools. Many people have contributed to it since.