tests: Introduce 0043_concatenated_ranges_1 for subnets of different sizes

The report from https://bugzilla.netfilter.org/show_bug.cgi?id=1520
showed a display issue with particular IPv6 mask lengths in elements
of sets with concatenations. Make sure we cover insertion and listing
of different mask lengths in concatenated set elements for IPv4 and
IPv6.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>

diff --git a/tests/shell/testcases/sets/0043concatenated_ranges_1 b/tests/shell/testcases/sets/0043concatenated_ranges_1
new file mode 100755 (executable)
index 0000000..bab189c
--- /dev/null
+++ b/tests/shell/testcases/sets/0043concatenated_ranges_1
@@ -0,0 +1,23 @@
+#!/bin/sh -e
+#
+# 0043concatenated_ranges_1 - Insert and list subnets of different sizes
+
+check() {
+       $NFT add element "${1}" t s "{ ${2} . ${3} }"
+       [ "$( $NFT list set "${1}" t s | grep -c "${2} . ${3}" )" = 1 ]
+}
+
+$NFT add table ip6 t
+$NFT add table ip  t
+
+$NFT add set ip6 t s '{ type ipv6_addr . ipv6_addr ; flags interval ; }'
+$NFT add set ip  t s '{ type ipv4_addr . ipv4_addr ; flags interval ; }'
+
+for n in $(seq 32 127); do
+       h="$(printf %x "${n}")"
+       check ip6 "2001:db8::/${n}" "2001:db8:${h}::-2001:db8:${h}::${h}:1"
+done
+
+for n in $(seq 24 31); do
+       check ip  "192.0.2.0/${n}"  "192.0.2.$((n * 3))-192.0.2.$((n * 3 + 2))"
+done