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