[iproute2-next PATCH v2] man: tc-flower: Add explanation for range option

[Amritha Nambiar <amritha.nambiar@intel.com>]

Add details explaining filtering based on port ranges.

v2: Modified description to remove range as standalone option
and updated as part of dst_port/src_port.

Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
---
 man/man8/tc-flower.8 |   15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/man/man8/tc-flower.8 b/man/man8/tc-flower.8
index 8be8882..1d195d0 100644
--- a/man/man8/tc-flower.8
+++ b/man/man8/tc-flower.8
@@ -56,8 +56,10 @@ flower \- flow based traffic control filter
 .IR MASKED_IP_TTL " | { "
 .BR dst_ip " | " src_ip " } "
 .IR PREFIX " | { "
-.BR dst_port " | " src_port " } "
-.IR port_number " } | "
+.BR dst_port " | " src_port " } { "
+.IR port_number " | "
+.B range
+.IR min_port_number-max_port_number " } | "
 .B tcp_flags
 .IR MASKED_TCP_FLAGS " | "
 .B type
@@ -220,10 +222,13 @@ must be a valid IPv4 or IPv6 address, depending on the \fBprotocol\fR
 option to tc filter, optionally followed by a slash and the prefix length.
 If the prefix is missing, \fBtc\fR assumes a full-length host match.
 .TP
-.BI dst_port " NUMBER"
+.BR dst_port " { "  \fINUMBER " | " range " \fIMIN_VALUE-MAX_VALUE "  \fR }
 .TQ
-.BI src_port " NUMBER"
-Match on layer 4 protocol source or destination port number. Only available for
+.BR src_port " { "  \fINUMBER " | " range " \fIMIN_VALUE-MAX_VALUE "  \fR }
+Match on layer 4 protocol source or destination port number. Alternatively, the
+\fBrange\fR option can be used to match on a range of layer 4 protocol source
+or destination port numbers by specifying the mininum and maximum values. Only
+available for
 .BR ip_proto " values " udp ", " tcp  " and " sctp
 which have to be specified in beforehand.
 .TP