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#!/bin/sh -e
#
# 0044interval_overlap_0 - Add overlapping and non-overlapping intervals
#
# Check that adding overlapping intervals to a set returns an error, unless:
# - the inserted element overlaps entirely, that is, it's identical to an
# existing one
# - for concatenated ranges, the new element is less specific than any existing
# overlapping element, as elements are evaluated in order of insertion
#
# Then, repeat the test with a set configured with a timeout, checking that:
# - we can insert all the elements as described above
# - once the timeout has expired, we can insert all the elements again, and old
# elements are not present
# - before the timeout expires again, we can re-add elements that are not
# expected to fail, but old elements might be present
#
# If $NFT points to a libtool wrapper, and we're running on a slow machine or
# kernel (e.g. KASan enabled), it might not be possible to execute hundreds of
# commands within an otherwise reasonable 1 second timeout. Estimate a usable
# timeout first, by counting commands and measuring against one nft rule timeout
# itself, so that we can keep this fast for a binary $NFT on a reasonably fast
# kernel.
# Accept Interval List
intervals_simple="
y 0 - 2 0-2
y 0 - 2 0-2
n 0 - 1 0-2
n 0 - 3 0-2
y 3 - 10 0-2, 3-10
n 3 - 9 0-2, 3-10
n 4 - 10 0-2, 3-10
n 4 - 9 0-2, 3-10
y 20 - 30 0-2, 3-10, 20-30
y 11 - 12 0-2, 3-10, 11-12, 20-30
y 13 - 19 0-2, 3-10, 11-12, 13-19, 20-30
n 25 - 40 0-2, 3-10, 11-12, 13-19, 20-30
y 50 - 60 0-2, 3-10, 11-12, 13-19, 20-30, 50-60
y 31 - 49 0-2, 3-10, 11-12, 13-19, 20-30, 31-49, 50-60
n 59 - 60 0-2, 3-10, 11-12, 13-19, 20-30, 31-49, 50-60
"
intervals_concat="
y 0-2 . 0-3 0-2 . 0-3
y 0-2 . 0-3 0-2 . 0-3
n 0-1 . 0-2 0-2 . 0-3
y 10-20 . 30-40 0-2 . 0-3, 10-20 . 30-40
y 15-20 . 50-60 0-2 . 0-3, 10-20 . 30-40, 15-20 . 50-60
y 3-9 . 4-29 0-2 . 0-3, 10-20 . 30-40, 15-20 . 50-60, 3-9 . 4-29
y 3-9 . 4-29 0-2 . 0-3, 10-20 . 30-40, 15-20 . 50-60, 3-9 . 4-29
n 11-19 . 30-40 0-2 . 0-3, 10-20 . 30-40, 15-20 . 50-60, 3-9 . 4-29
y 15-20 . 49-61 0-2 . 0-3, 10-20 . 30-40, 15-20 . 50-60, 3-9 . 4-29, 15-20 . 49-61
"
count_elements() {
pass=
interval=
elements=0
for t in ${intervals_simple} ${intervals_concat}; do
[ -z "${pass}" ] && pass="${t}" && continue
[ -z "${interval}" ] && interval="${t}" && continue
unset IFS
elements=$((elements + 1))
IFS='
'
done
unset IFS
}
match_elements() {
skip=0
n=0
out=
for a in $($NFT list set t ${1})}; do
[ ${n} -eq 0 ] && { [ "${a}" = "elements" ] && n=1; continue; }
[ ${n} -eq 1 ] && { [ "${a}" = "=" ] && n=2; continue; }
[ ${n} -eq 2 ] && { [ "${a}" = "{" ] && n=3; continue; }
[ "${a}" = "}" ] && break
[ ${skip} -eq 1 ] && skip=0 && out="${out}," && continue
[ "${a}" = "expires" ] && skip=1 && continue
[ -n "${out}" ] && out="${out} ${a}" || out="${a}"
done
if [ "${out%,}" != "${2}" ]; then
echo "Expected: ${2}, got: ${out%,}"
return 1
fi
}
estimate_timeout() {
count_elements
$NFT add table t
$NFT add set t s '{ type inet_service ; flags timeout; timeout 1s; gc-interval 1s; }'
execs_1s=1
$NFT add element t s "{ 0 }"
while match_elements s "0" >/dev/null; do
execs_1s=$((execs_1s + 1))
done
timeout="$((elements / execs_1s * 3 / 2 + 1))"
}
add_elements() {
set="s"
pass=
interval=
IFS='
'
for t in ${intervals_simple} switch ${intervals_concat}; do
[ "${t}" = "switch" ] && set="c" && continue
[ -z "${pass}" ] && pass="${t}" && continue
[ -z "${interval}" ] && interval="${t}" && continue
unset IFS
if [ "${pass}" = "y" ]; then
if ! $NFT add element t ${set} "{ ${interval} }"; then
echo "Failed to insert ${interval} given:"
$NFT list ruleset
exit 1
fi
else
if $NFT add element t ${set} "{ ${interval} }" 2>/dev/null; then
echo "Could insert ${interval} given:"
$NFT list ruleset
exit 1
fi
fi
[ "${1}" != "nomatch" ] && match_elements "${set}" "${t}"
pass=
interval=
IFS='
'
done
unset IFS
}
$NFT add table t
$NFT add set t s '{ type inet_service ; flags interval ; }'
$NFT add set t c '{ type inet_service . inet_service ; flags interval ; }'
add_elements
$NFT flush ruleset
estimate_timeout
$NFT flush ruleset
$NFT add table t
$NFT add set t s "{ type inet_service ; flags interval,timeout; timeout ${timeout}s; gc-interval ${timeout}s; }"
$NFT add set t c "{ type inet_service . inet_service ; flags interval,timeout ; timeout ${timeout}s; gc-interval ${timeout}s; }"
add_elements
sleep $((timeout * 3 / 2))
add_elements
add_elements nomatch
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