File: 0003jump_loop_1

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nftables 1.1.6-1
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#!/bin/bash

set -e

MAX_JUMPS=16

$NFT add table t
$NFT "add chain t c1 { type filter hook prerouting priority 0; }"

for i in $(seq 2 $MAX_JUMPS)
do
	$NFT add chain t c${i}
done

for i in $(seq 1 $((MAX_JUMPS - 1)))
do
	$NFT add rule t c${i} jump c$((i + 1))
done

# this last jump should fail: loop
$NFT add rule t c${MAX_JUMPS} jump c1 2>/dev/null || exit 0
echo "E: loop of jumps ignored?" >&2
exit 1