tests: shell: validate maximum chain depth

Original script from Taehee Yoo.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/chains/0020depth_1 b/tests/shell/testcases/chains/0020depth_1
new file mode 100755 (executable)
index 0000000..fa539c8
--- /dev/null
+++ b/tests/shell/testcases/chains/0020depth_1
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -e
+
+$NFT add table ip filter
+$NFT add chain ip filter input { type filter hook input priority 0\; }
+
+for ((i=0;i<20;i++)); do
+       $NFT add chain ip filter a$i
+done
+
+$NFT add rule ip filter input jump a1
+
+for ((i=0;i<10;i++)); do
+       $NFT add rule ip filter a$i jump a$((i+1))
+done
+
+for ((i=11;i<19;i++)); do
+       $NFT add rule ip filter a$i jump a$((i+1))
+done
+
+$NFT add rule ip filter a10 jump a11