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blockcheck.sh : disable ipfrag tests if conditions not met

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bol-van 2022-02-05 22:19:17 +03:00
parent cc7274ca25
commit 96bc42f012
1 changed files with 24 additions and 4 deletions
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28
blockcheck.sh
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@ -120,6 +120,11 @@ ipt6_has_raw()
{
ip6tables -nL -t raw >/dev/null 2>/dev/null
}
ipt6_has_frag()
{
ip6tables -A OUTPUT -m frag 2>/dev/null || return 1
ip6tables -D OUTPUT -m frag 2>/dev/null
}
ipt_has_nfq()
{
# cannot just check /proc/net/ip_tables_targets because of iptables-nft or modules not loaded yet
@ -589,7 +594,9 @@ pktws_check_domain_bypass()
done
done
[ "$IPV" = 6 ] && {
for desync in hopbyhop hopbyhop,split2 hopbyhop,disorder2 destopt destopt,split2 destopt,disorder2 ipfrag1 ipfrag1,split2 ipfrag1,disorder2; do
f="hopbyhop hopbyhop,split2 hopbyhop,disorder2 destopt destopt,split2 destopt,disorder2"
[ -n "$IP6_DEFRAG_DISABLE" ] && f="$f ipfrag1 ipfrag1,split2 ipfrag1,disorder2"
for desync in $f; do
pktws_curl_test_update $1 $3 --dpi-desync=$desync $e
done
}
@ -796,16 +803,29 @@ ask_params()
local V1=$(sed -nre 's/^Linux version ([0-9]+)\.[0-9]+.*$/\1/p' /proc/version)
local V2=$(sed -nre 's/^Linux version [0-9]+\.([0-9]+).*$/\1/p' /proc/version)
if [ "$V1" -gt 4 -o "$V1" = 4 -a "$V2" -ge 16 ]; then
ipt6_has_raw && IP6_DEFRAG_DISABLE=1
[ -n "$IP6_DEFRAG_DISABLE" ] || {
if ipt6_has_raw ; then
if ipt6_has_frag; then
IP6_DEFRAG_DISABLE=1
else
echo "WARNING ! ip6tables does not have '-m frag' module, ipv6 ipfrag tests are disabled"
echo
fi
else
echo "WARNING ! ip6tables raw table is not available, ipv6 ipfrag tests are disabled"
echo
}
fi
else
echo "WARNING ! ipv6 defrag can only be effectively disabled in linux kernel 4.16+"
echo "WARNING ! ipv6 ipfrag tests are disabled"
echo
fi
[ -n "$IP6_DEFRAG_DISABLE" ] && {
local ipexe="$(readlink -f $(which ip6tables))"
[ "${ipexe#*nft}" != "$ipexe" ] &&
echo "WARNING ! ipv6 ipfrag tests may have no effect if ip6tables-nft is used. current ip6tables point to : $ipexe"
echo "WARNING ! ipv6 ipfrag tests may have no effect if ip6table_raw kernel module is not loaded with parameter : raw_before_defrag=1"
echo
}
}
;;
*)