tc: nat: ffs should operation on host byte ordered data

In print_nat the mask length is calculated as

	len = ffs(sel->mask);
	len = len ? 33 - len : 0;

The mask is stored in network byte order, it should be converted
to host byte order before calculating first bit set.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/tc/m_nat.c b/tc/m_nat.c
index da947aeabb3d0eb5e138835bd9b912a50c9fc0cc..0ec3fd117b9a0ad56f418f118be246b5dc2c69e1 100644 (file)
--- a/tc/m_nat.c
+++ b/tc/m_nat.c
@@ -156,7 +156,7 @@ print_nat(const struct action_util *au, FILE * f, struct rtattr *arg)
        }
        sel = RTA_DATA(tb[TCA_NAT_PARMS]);
 
-       len = ffs(sel->mask);
+       len = ffs(ntohl(sel->mask));
        len = len ? 33 - len : 0;
 
        print_string(PRINT_ANY, "direction", "%s",