1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# 4# Run a couple of IP defragmentation tests. 5 6set +x 7set -e 8 9modprobe -q nf_defrag_ipv6 10 11readonly NETNS="ns-$(mktemp -u XXXXXX)" 12 13setup() { 14 ip netns add "${NETNS}" 15 ip -netns "${NETNS}" link set lo up 16 17 ip netns exec "${NETNS}" sysctl -w net.ipv4.ipfrag_high_thresh=9000000 >/dev/null 2>&1 18 ip netns exec "${NETNS}" sysctl -w net.ipv4.ipfrag_low_thresh=7000000 >/dev/null 2>&1 19 ip netns exec "${NETNS}" sysctl -w net.ipv4.ipfrag_time=1 >/dev/null 2>&1 20 21 ip netns exec "${NETNS}" sysctl -w net.ipv6.ip6frag_high_thresh=9000000 >/dev/null 2>&1 22 ip netns exec "${NETNS}" sysctl -w net.ipv6.ip6frag_low_thresh=7000000 >/dev/null 2>&1 23 ip netns exec "${NETNS}" sysctl -w net.ipv6.ip6frag_time=1 >/dev/null 2>&1 24 25 ip netns exec "${NETNS}" sysctl -w net.netfilter.nf_conntrack_frag6_high_thresh=9000000 >/dev/null 2>&1 26 ip netns exec "${NETNS}" sysctl -w net.netfilter.nf_conntrack_frag6_low_thresh=7000000 >/dev/null 2>&1 27 ip netns exec "${NETNS}" sysctl -w net.netfilter.nf_conntrack_frag6_timeout=1 >/dev/null 2>&1 28 29 # DST cache can get full with a lot of frags, with GC not keeping up with the test. 30 ip netns exec "${NETNS}" sysctl -w net.ipv6.route.max_size=65536 >/dev/null 2>&1 31} 32 33cleanup() { 34 ip netns del "${NETNS}" 35} 36 37trap cleanup EXIT 38setup 39 40echo "ipv4 defrag" 41ip netns exec "${NETNS}" ./ip_defrag -4 42 43echo "ipv4 defrag with overlaps" 44ip netns exec "${NETNS}" ./ip_defrag -4o 45 46echo "ipv6 defrag" 47ip netns exec "${NETNS}" ./ip_defrag -6 48 49echo "ipv6 defrag with overlaps" 50ip netns exec "${NETNS}" ./ip_defrag -6o 51 52# insert an nf_conntrack rule so that the codepath in nf_conntrack_reasm.c taken 53ip netns exec "${NETNS}" ip6tables -A INPUT -m conntrack --ctstate INVALID -j ACCEPT 54 55echo "ipv6 nf_conntrack defrag" 56ip netns exec "${NETNS}" ./ip_defrag -6 57 58echo "ipv6 nf_conntrack defrag with overlaps" 59# netfilter will drop some invalid packets, so we run the test in 60# permissive mode: i.e. pass the test if the packet is correctly assembled 61# even if we sent an overlap 62ip netns exec "${NETNS}" ./ip_defrag -6op 63 64echo "all tests done" 65