447 lines
14 KiB
Bash
447 lines
14 KiB
Bash
|
#!/bin/sh
|
||
|
|
# SPDX-License-Identifier: GPL-2.0
|
||
|
|
|
||
|
|
# Author: Matthias May <matthias.may@westermo.com>
|
||
|
|
#
|
||
|
|
# This script evaluates ip tunnels that are capable of carrying L2 traffic
|
||
|
|
# if they inherit or set the inheritable fields.
|
||
|
|
# Namely these tunnels are: 'gretap', 'vxlan' and 'geneve'.
|
||
|
|
# Checked inheritable fields are: TOS and TTL.
|
||
|
|
# The outer tunnel protocol of 'IPv4' or 'IPv6' is verified-
|
||
|
|
# As payload frames of type 'IPv4', 'IPv6' and 'other'(ARP) are verified.
|
||
|
|
# In addition this script also checks if forcing a specific field in the
|
||
|
|
# outer header is working.
|
||
|
|
|
||
|
|
# Return 4 by default (Kselftest SKIP code)
|
||
|
|
ERR=4
|
||
|
|
|
||
|
|
if [ "$(id -u)" != "0" ]; then
|
||
|
|
echo "Please run as root."
|
||
|
|
exit $ERR
|
||
|
|
fi
|
||
|
|
if ! which tcpdump > /dev/null 2>&1; then
|
||
|
|
echo "No tcpdump found. Required for this test."
|
||
|
|
exit $ERR
|
||
|
|
fi
|
||
|
|
|
||
|
|
expected_tos="0x00"
|
||
|
|
expected_ttl="0"
|
||
|
|
failed=false
|
||
|
|
|
||
|
|
readonly NS0=$(mktemp -u ns0-XXXXXXXX)
|
||
|
|
readonly NS1=$(mktemp -u ns1-XXXXXXXX)
|
||
|
|
|
||
|
|
RUN_NS0="ip netns exec ${NS0}"
|
||
|
|
|
||
|
|
get_random_tos() {
|
||
|
|
# Get a random hex tos value between 0x00 and 0xfc, a multiple of 4
|
||
|
|
echo "0x$(tr -dc '0-9a-f' < /dev/urandom | head -c 1)\
|
||
|
|
$(tr -dc '048c' < /dev/urandom | head -c 1)"
|
||
|
|
}
|
||
|
|
get_random_ttl() {
|
||
|
|
# Get a random dec value between 0 and 255
|
||
|
|
printf "%d" "0x$(tr -dc '0-9a-f' < /dev/urandom | head -c 2)"
|
||
|
|
}
|
||
|
|
get_field() {
|
||
|
|
# Expects to get the 'head -n 1' of a captured frame by tcpdump.
|
||
|
|
# Parses this first line and returns the specified field.
|
||
|
|
local field="$1"
|
||
|
|
local input="$2"
|
||
|
|
local found=false
|
||
|
|
input="$(echo "$input" | tr -d '(),')"
|
||
|
|
for input_field in $input; do
|
||
|
|
if $found; then
|
||
|
|
echo "$input_field"
|
||
|
|
return
|
||
|
|
fi
|
||
|
|
# The next field that we iterate over is the looked for value
|
||
|
|
if [ "$input_field" = "$field" ]; then
|
||
|
|
found=true
|
||
|
|
fi
|
||
|
|
done
|
||
|
|
echo "0"
|
||
|
|
}
|
||
|
|
setup() {
|
||
|
|
local type="$1"
|
||
|
|
local outer="$2"
|
||
|
|
local inner="$3"
|
||
|
|
local tos_ttl="$4"
|
||
|
|
local vlan="$5"
|
||
|
|
local test_tos="0x00"
|
||
|
|
local test_ttl="0"
|
||
|
|
|
||
|
|
# We don't want a test-tos of 0x00,
|
||
|
|
# because this is the value that we get when no tos is set.
|
||
|
|
expected_tos="$(get_random_tos)"
|
||
|
|
while [ "$expected_tos" = "0x00" ]; do
|
||
|
|
expected_tos="$(get_random_tos)"
|
||
|
|
done
|
||
|
|
if [ "$tos_ttl" = "random" ]; then
|
||
|
|
test_tos="$expected_tos"
|
||
|
|
tos="fixed $test_tos"
|
||
|
|
elif [ "$tos_ttl" = "inherit" ]; then
|
||
|
|
test_tos="$tos_ttl"
|
||
|
|
tos="inherit $expected_tos"
|
||
|
|
fi
|
||
|
|
|
||
|
|
# We don't want a test-ttl of 64 or 0,
|
||
|
|
# because 64 is when no ttl is set and 0 is not a valid ttl.
|
||
|
|
expected_ttl="$(get_random_ttl)"
|
||
|
|
while [ "$expected_ttl" = "64" ] || [ "$expected_ttl" = "0" ]; do
|
||
|
|
expected_ttl="$(get_random_ttl)"
|
||
|
|
done
|
||
|
|
|
||
|
|
if [ "$tos_ttl" = "random" ]; then
|
||
|
|
test_ttl="$expected_ttl"
|
||
|
|
ttl="fixed $test_ttl"
|
||
|
|
elif [ "$tos_ttl" = "inherit" ]; then
|
||
|
|
test_ttl="$tos_ttl"
|
||
|
|
ttl="inherit $expected_ttl"
|
||
|
|
fi
|
||
|
|
printf "│%7s │%6s │%6s │%13s │%13s │%6s │" \
|
||
|
|
"$type" "$outer" "$inner" "$tos" "$ttl" "$vlan"
|
||
|
|
|
||
|
|
# Create netns NS0 and NS1 and connect them with a veth pair
|
||
|
|
ip netns add "${NS0}"
|
||
|
|
ip netns add "${NS1}"
|
||
|
|
ip link add name veth0 netns "${NS0}" type veth \
|
||
|
|
peer name veth1 netns "${NS1}"
|
||
|
|
ip -netns "${NS0}" link set dev veth0 up
|
||
|
|
ip -netns "${NS1}" link set dev veth1 up
|
||
|
|
ip -netns "${NS0}" address flush dev veth0
|
||
|
|
ip -netns "${NS1}" address flush dev veth1
|
||
|
|
|
||
|
|
local local_addr1=""
|
||
|
|
local local_addr2=""
|
||
|
|
if [ "$type" = "gre" ] || [ "$type" = "vxlan" ]; then
|
||
|
|
if [ "$outer" = "4" ]; then
|
||
|
|
local_addr1="local 198.18.0.1"
|
||
|
|
local_addr2="local 198.18.0.2"
|
||
|
|
elif [ "$outer" = "6" ]; then
|
||
|
|
local_addr1="local fdd1:ced0:5d88:3fce::1"
|
||
|
|
local_addr2="local fdd1:ced0:5d88:3fce::2"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
local vxlan=""
|
||
|
|
if [ "$type" = "vxlan" ]; then
|
||
|
|
vxlan="vni 100 dstport 4789"
|
||
|
|
fi
|
||
|
|
local geneve=""
|
||
|
|
if [ "$type" = "geneve" ]; then
|
||
|
|
geneve="vni 100"
|
||
|
|
fi
|
||
|
|
# Create tunnel and assign outer IPv4/IPv6 addresses
|
||
|
|
if [ "$outer" = "4" ]; then
|
||
|
|
if [ "$type" = "gre" ]; then
|
||
|
|
type="gretap"
|
||
|
|
fi
|
||
|
|
ip -netns "${NS0}" address add 198.18.0.1/24 dev veth0
|
||
|
|
ip -netns "${NS1}" address add 198.18.0.2/24 dev veth1
|
||
|
|
ip -netns "${NS0}" link add name tep0 type $type $local_addr1 \
|
||
|
|
remote 198.18.0.2 tos $test_tos ttl $test_ttl \
|
||
|
|
$vxlan $geneve
|
||
|
|
ip -netns "${NS1}" link add name tep1 type $type $local_addr2 \
|
||
|
|
remote 198.18.0.1 tos $test_tos ttl $test_ttl \
|
||
|
|
$vxlan $geneve
|
||
|
|
elif [ "$outer" = "6" ]; then
|
||
|
|
if [ "$type" = "gre" ]; then
|
||
|
|
type="ip6gretap"
|
||
|
|
fi
|
||
|
|
ip -netns "${NS0}" address add fdd1:ced0:5d88:3fce::1/64 \
|
||
|
|
dev veth0 nodad
|
||
|
|
ip -netns "${NS1}" address add fdd1:ced0:5d88:3fce::2/64 \
|
||
|
|
dev veth1 nodad
|
||
|
|
ip -netns "${NS0}" link add name tep0 type $type $local_addr1 \
|
||
|
|
remote fdd1:ced0:5d88:3fce::2 tos $test_tos \
|
||
|
|
ttl $test_ttl $vxlan $geneve
|
||
|
|
ip -netns "${NS1}" link add name tep1 type $type $local_addr2 \
|
||
|
|
remote fdd1:ced0:5d88:3fce::1 tos $test_tos \
|
||
|
|
ttl $test_ttl $vxlan $geneve
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Bring L2-tunnel link up and create VLAN on top
|
||
|
|
ip -netns "${NS0}" link set tep0 up
|
||
|
|
ip -netns "${NS1}" link set tep1 up
|
||
|
|
ip -netns "${NS0}" address flush dev tep0
|
||
|
|
ip -netns "${NS1}" address flush dev tep1
|
||
|
|
local parent
|
||
|
|
if $vlan; then
|
||
|
|
parent="vlan99-"
|
||
|
|
ip -netns "${NS0}" link add link tep0 name ${parent}0 \
|
||
|
|
type vlan id 99
|
||
|
|
ip -netns "${NS1}" link add link tep1 name ${parent}1 \
|
||
|
|
type vlan id 99
|
||
|
|
ip -netns "${NS0}" link set dev ${parent}0 up
|
||
|
|
ip -netns "${NS1}" link set dev ${parent}1 up
|
||
|
|
ip -netns "${NS0}" address flush dev ${parent}0
|
||
|
|
ip -netns "${NS1}" address flush dev ${parent}1
|
||
|
|
else
|
||
|
|
parent="tep"
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Assign inner IPv4/IPv6 addresses
|
||
|
|
if [ "$inner" = "4" ] || [ "$inner" = "other" ]; then
|
||
|
|
ip -netns "${NS0}" address add 198.19.0.1/24 brd + dev ${parent}0
|
||
|
|
ip -netns "${NS1}" address add 198.19.0.2/24 brd + dev ${parent}1
|
||
|
|
elif [ "$inner" = "6" ]; then
|
||
|
|
ip -netns "${NS0}" address add fdd4:96cf:4eae:443b::1/64 \
|
||
|
|
dev ${parent}0 nodad
|
||
|
|
ip -netns "${NS1}" address add fdd4:96cf:4eae:443b::2/64 \
|
||
|
|
dev ${parent}1 nodad
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
verify() {
|
||
|
|
local outer="$1"
|
||
|
|
local inner="$2"
|
||
|
|
local tos_ttl="$3"
|
||
|
|
local vlan="$4"
|
||
|
|
|
||
|
|
local ping_pid out captured_tos captured_ttl result
|
||
|
|
|
||
|
|
local ping_dst
|
||
|
|
if [ "$inner" = "4" ]; then
|
||
|
|
ping_dst="198.19.0.2"
|
||
|
|
elif [ "$inner" = "6" ]; then
|
||
|
|
ping_dst="fdd4:96cf:4eae:443b::2"
|
||
|
|
elif [ "$inner" = "other" ]; then
|
||
|
|
ping_dst="198.19.0.3" # Generates ARPs which are not IPv4/IPv6
|
||
|
|
fi
|
||
|
|
if [ "$tos_ttl" = "inherit" ]; then
|
||
|
|
${RUN_NS0} ping -i 0.1 $ping_dst -Q "$expected_tos" \
|
||
|
|
-t "$expected_ttl" 2>/dev/null 1>&2 & ping_pid="$!"
|
||
|
|
else
|
||
|
|
${RUN_NS0} ping -i 0.1 $ping_dst 2>/dev/null 1>&2 & ping_pid="$!"
|
||
|
|
fi
|
||
|
|
local tunnel_type_offset tunnel_type_proto req_proto_offset req_offset
|
||
|
|
if [ "$type" = "gre" ]; then
|
||
|
|
tunnel_type_proto="0x2f"
|
||
|
|
elif [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
tunnel_type_proto="0x11"
|
||
|
|
fi
|
||
|
|
if [ "$outer" = "4" ]; then
|
||
|
|
tunnel_type_offset="9"
|
||
|
|
if [ "$inner" = "4" ]; then
|
||
|
|
req_proto_offset="47"
|
||
|
|
req_offset="58"
|
||
|
|
if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 12))"
|
||
|
|
req_offset="$((req_offset + 12))"
|
||
|
|
fi
|
||
|
|
if $vlan; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
|
||
|
|
-i veth0 -n \
|
||
|
|
ip[$tunnel_type_offset] = $tunnel_type_proto and \
|
||
|
|
ip[$req_proto_offset] = 0x01 and \
|
||
|
|
ip[$req_offset] = 0x08 2>/dev/null \
|
||
|
|
| head -n 1)"
|
||
|
|
elif [ "$inner" = "6" ]; then
|
||
|
|
req_proto_offset="44"
|
||
|
|
req_offset="78"
|
||
|
|
if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 12))"
|
||
|
|
req_offset="$((req_offset + 12))"
|
||
|
|
fi
|
||
|
|
if $vlan; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
|
||
|
|
-i veth0 -n \
|
||
|
|
ip[$tunnel_type_offset] = $tunnel_type_proto and \
|
||
|
|
ip[$req_proto_offset] = 0x3a and \
|
||
|
|
ip[$req_offset] = 0x80 2>/dev/null \
|
||
|
|
| head -n 1)"
|
||
|
|
elif [ "$inner" = "other" ]; then
|
||
|
|
req_proto_offset="36"
|
||
|
|
req_offset="45"
|
||
|
|
if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 12))"
|
||
|
|
req_offset="$((req_offset + 12))"
|
||
|
|
fi
|
||
|
|
if $vlan; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
if [ "$tos_ttl" = "inherit" ]; then
|
||
|
|
expected_tos="0x00"
|
||
|
|
expected_ttl="64"
|
||
|
|
fi
|
||
|
|
out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
|
||
|
|
-i veth0 -n \
|
||
|
|
ip[$tunnel_type_offset] = $tunnel_type_proto and \
|
||
|
|
ip[$req_proto_offset] = 0x08 and \
|
||
|
|
ip[$((req_proto_offset + 1))] = 0x06 and \
|
||
|
|
ip[$req_offset] = 0x01 2>/dev/null \
|
||
|
|
| head -n 1)"
|
||
|
|
fi
|
||
|
|
elif [ "$outer" = "6" ]; then
|
||
|
|
if [ "$type" = "gre" ]; then
|
||
|
|
tunnel_type_offset="40"
|
||
|
|
elif [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
tunnel_type_offset="6"
|
||
|
|
fi
|
||
|
|
if [ "$inner" = "4" ]; then
|
||
|
|
local req_proto_offset="75"
|
||
|
|
local req_offset="86"
|
||
|
|
if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
if $vlan; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
|
||
|
|
-i veth0 -n \
|
||
|
|
ip6[$tunnel_type_offset] = $tunnel_type_proto and \
|
||
|
|
ip6[$req_proto_offset] = 0x01 and \
|
||
|
|
ip6[$req_offset] = 0x08 2>/dev/null \
|
||
|
|
| head -n 1)"
|
||
|
|
elif [ "$inner" = "6" ]; then
|
||
|
|
local req_proto_offset="72"
|
||
|
|
local req_offset="106"
|
||
|
|
if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
if $vlan; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
|
||
|
|
-i veth0 -n \
|
||
|
|
ip6[$tunnel_type_offset] = $tunnel_type_proto and \
|
||
|
|
ip6[$req_proto_offset] = 0x3a and \
|
||
|
|
ip6[$req_offset] = 0x80 2>/dev/null \
|
||
|
|
| head -n 1)"
|
||
|
|
elif [ "$inner" = "other" ]; then
|
||
|
|
local req_proto_offset="64"
|
||
|
|
local req_offset="73"
|
||
|
|
if [ "$type" = "vxlan" ] || [ "$type" = "geneve" ]; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
if $vlan; then
|
||
|
|
req_proto_offset="$((req_proto_offset + 4))"
|
||
|
|
req_offset="$((req_offset + 4))"
|
||
|
|
fi
|
||
|
|
if [ "$tos_ttl" = "inherit" ]; then
|
||
|
|
expected_tos="0x00"
|
||
|
|
expected_ttl="64"
|
||
|
|
fi
|
||
|
|
out="$(${RUN_NS0} tcpdump --immediate-mode -p -c 1 -v \
|
||
|
|
-i veth0 -n \
|
||
|
|
ip6[$tunnel_type_offset] = $tunnel_type_proto and \
|
||
|
|
ip6[$req_proto_offset] = 0x08 and \
|
||
|
|
ip6[$((req_proto_offset + 1))] = 0x06 and \
|
||
|
|
ip6[$req_offset] = 0x01 2>/dev/null \
|
||
|
|
| head -n 1)"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
kill -9 $ping_pid
|
||
|
|
wait $ping_pid 2>/dev/null || true
|
||
|
|
result="FAIL"
|
||
|
|
if [ "$outer" = "4" ]; then
|
||
|
|
captured_ttl="$(get_field "ttl" "$out")"
|
||
|
|
captured_tos="$(printf "0x%02x" "$(get_field "tos" "$out")")"
|
||
|
|
if [ "$captured_tos" = "$expected_tos" ] &&
|
||
|
|
[ "$captured_ttl" = "$expected_ttl" ]; then
|
||
|
|
result="OK"
|
||
|
|
fi
|
||
|
|
elif [ "$outer" = "6" ]; then
|
||
|
|
captured_ttl="$(get_field "hlim" "$out")"
|
||
|
|
captured_tos="$(printf "0x%02x" "$(get_field "class" "$out")")"
|
||
|
|
if [ "$captured_tos" = "$expected_tos" ] &&
|
||
|
|
[ "$captured_ttl" = "$expected_ttl" ]; then
|
||
|
|
result="OK"
|
||
|
|
fi
|
||
|
|
fi
|
||
|
|
|
||
|
|
printf "%7s │\n" "$result"
|
||
|
|
if [ "$result" = "FAIL" ]; then
|
||
|
|
failed=true
|
||
|
|
if [ "$captured_tos" != "$expected_tos" ]; then
|
||
|
|
printf "│%43s%27s │\n" \
|
||
|
|
"Expected TOS value: $expected_tos" \
|
||
|
|
"Captured TOS value: $captured_tos"
|
||
|
|
fi
|
||
|
|
if [ "$captured_ttl" != "$expected_ttl" ]; then
|
||
|
|
printf "│%43s%27s │\n" \
|
||
|
|
"Expected TTL value: $expected_ttl" \
|
||
|
|
"Captured TTL value: $captured_ttl"
|
||
|
|
fi
|
||
|
|
printf "│%71s│\n" " "
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
cleanup() {
|
||
|
|
ip netns del "${NS0}" 2>/dev/null
|
||
|
|
ip netns del "${NS1}" 2>/dev/null
|
||
|
|
}
|
||
|
|
|
||
|
|
exit_handler() {
|
||
|
|
# Don't exit immediately if one of the intermediate commands fails.
|
||
|
|
# We might be called at the end of the script, when the network
|
||
|
|
# namespaces have already been deleted. So cleanup() may fail, but we
|
||
|
|
# still need to run until 'exit $ERR' or the script won't return the
|
||
|
|
# correct error code.
|
||
|
|
set +e
|
||
|
|
|
||
|
|
cleanup
|
||
|
|
|
||
|
|
exit $ERR
|
||
|
|
}
|
||
|
|
|
||
|
|
# Restore the default SIGINT handler (just in case) and exit.
|
||
|
|
# The exit handler will take care of cleaning everything up.
|
||
|
|
interrupted() {
|
||
|
|
trap - INT
|
||
|
|
|
||
|
|
exit $ERR
|
||
|
|
}
|
||
|
|
|
||
|
|
set -e
|
||
|
|
trap exit_handler EXIT
|
||
|
|
trap interrupted INT
|
||
|
|
|
||
|
|
printf "┌────────┬───────┬───────┬──────────────┬"
|
||
|
|
printf "──────────────┬───────┬────────┐\n"
|
||
|
|
for type in gre vxlan geneve; do
|
||
|
|
if ! $(modprobe "$type" 2>/dev/null); then
|
||
|
|
continue
|
||
|
|
fi
|
||
|
|
for outer in 4 6; do
|
||
|
|
printf "├────────┼───────┼───────┼──────────────┼"
|
||
|
|
printf "──────────────┼───────┼────────┤\n"
|
||
|
|
printf "│ Type │ outer | inner │ tos │"
|
||
|
|
printf " ttl │ vlan │ result │\n"
|
||
|
|
for inner in 4 6 other; do
|
||
|
|
printf "├────────┼───────┼───────┼──────────────┼"
|
||
|
|
printf "──────────────┼───────┼────────┤\n"
|
||
|
|
for tos_ttl in inherit random; do
|
||
|
|
for vlan in false true; do
|
||
|
|
setup "$type" "$outer" "$inner" \
|
||
|
|
"$tos_ttl" "$vlan"
|
||
|
|
verify "$outer" "$inner" "$tos_ttl" \
|
||
|
|
"$vlan"
|
||
|
|
cleanup
|
||
|
|
done
|
||
|
|
done
|
||
|
|
done
|
||
|
|
done
|
||
|
|
done
|
||
|
|
printf "└────────┴───────┴───────┴──────────────┴"
|
||
|
|
printf "──────────────┴───────┴────────┘\n"
|
||
|
|
|
||
|
|
# All tests done.
|
||
|
|
# Set ERR appropriately: it will be returned by the exit handler.
|
||
|
|
if $failed; then
|
||
|
|
ERR=1
|
||
|
|
else
|
||
|
|
ERR=0
|
||
|
|
fi
|