65 lines · bash
1#!/bin/sh2# SPDX-License-Identifier: GPL-2.03#4# Run a couple of IP defragmentation tests.5 6set +x7set -e8 9modprobe -q nf_defrag_ipv610 11readonly NETNS="ns-$(mktemp -u XXXXXX)"12 13setup() {14 ip netns add "${NETNS}"15 ip -netns "${NETNS}" link set lo up16 17 ip netns exec "${NETNS}" sysctl -w net.ipv4.ipfrag_high_thresh=9000000 >/dev/null 2>&118 ip netns exec "${NETNS}" sysctl -w net.ipv4.ipfrag_low_thresh=7000000 >/dev/null 2>&119 ip netns exec "${NETNS}" sysctl -w net.ipv4.ipfrag_time=1 >/dev/null 2>&120 21 ip netns exec "${NETNS}" sysctl -w net.ipv6.ip6frag_high_thresh=9000000 >/dev/null 2>&122 ip netns exec "${NETNS}" sysctl -w net.ipv6.ip6frag_low_thresh=7000000 >/dev/null 2>&123 ip netns exec "${NETNS}" sysctl -w net.ipv6.ip6frag_time=1 >/dev/null 2>&124 25 ip netns exec "${NETNS}" sysctl -w net.netfilter.nf_conntrack_frag6_high_thresh=9000000 >/dev/null 2>&126 ip netns exec "${NETNS}" sysctl -w net.netfilter.nf_conntrack_frag6_low_thresh=7000000 >/dev/null 2>&127 ip netns exec "${NETNS}" sysctl -w net.netfilter.nf_conntrack_frag6_timeout=1 >/dev/null 2>&128 29 # DST cache can get full with a lot of frags, with GC not keeping up with the test.30 ip netns exec "${NETNS}" sysctl -w net.ipv6.route.max_size=65536 >/dev/null 2>&131}32 33cleanup() {34 ip netns del "${NETNS}"35}36 37trap cleanup EXIT38setup39 40echo "ipv4 defrag"41ip netns exec "${NETNS}" ./ip_defrag -442 43echo "ipv4 defrag with overlaps"44ip netns exec "${NETNS}" ./ip_defrag -4o45 46echo "ipv6 defrag"47ip netns exec "${NETNS}" ./ip_defrag -648 49echo "ipv6 defrag with overlaps"50ip netns exec "${NETNS}" ./ip_defrag -6o51 52# insert an nf_conntrack rule so that the codepath in nf_conntrack_reasm.c taken53ip netns exec "${NETNS}" ip6tables -A INPUT -m conntrack --ctstate INVALID -j ACCEPT54 55echo "ipv6 nf_conntrack defrag"56ip netns exec "${NETNS}" ./ip_defrag -657 58echo "ipv6 nf_conntrack defrag with overlaps"59# netfilter will drop some invalid packets, so we run the test in60# permissive mode: i.e. pass the test if the packet is correctly assembled61# even if we sent an overlap62ip netns exec "${NETNS}" ./ip_defrag -6op63 64echo "all tests done"65