2 # SPDX-License-Identifier: GPL-2.0
4 # Run a couple of IP defragmentation tests.
9 readonly NETNS="ns-$(mktemp -u XXXXXX)"
12 ip netns add "${NETNS}"
13 ip -netns "${NETNS}" link set lo up
15 ip netns exec "${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
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 "${NETNS}" sysctl -w net.ipv6.ip6frag_time=1 >/dev/null 2>&1
23 ip netns exec "${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
27 # DST cache can get full with a lot of frags, with GC not keeping up with the test.
28 ip netns exec "${NETNS}" sysctl -w net.ipv6.route.max_size=65536 >/dev/null 2>&1
32 ip netns del "${NETNS}"
39 ip netns exec "${NETNS}" ./ip_defrag -4
41 echo "ipv4 defrag with overlaps"
42 ip netns exec "${NETNS}" ./ip_defrag -4o
45 ip netns exec "${NETNS}" ./ip_defrag -6
47 echo "ipv6 defrag with overlaps"
48 ip netns exec "${NETNS}" ./ip_defrag -6o
50 # insert an nf_conntrack rule so that the codepath in nf_conntrack_reasm.c taken
51 ip netns exec "${NETNS}" ip6tables -A INPUT -m conntrack --ctstate INVALID -j ACCEPT
53 echo "ipv6 nf_conntrack defrag"
54 ip netns exec "${NETNS}" ./ip_defrag -6
56 echo "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
60 ip netns exec "${NETNS}" ./ip_defrag -6op