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|
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
# +--------------------+
# | H1 |
# | |
# | $h1.10 + |
# | 192.0.2.2/24 | |
# | 2001:db8:1::2/64 | |
# | | |
# | $h1 + |
# | | |
# +------------------|-+
# |
# +------------------|-+
# | SW | |
# | $swp1 + |
# | | |
# | $swp1.10 + |
# | 192.0.2.1/24 |
# | 2001:db8:1::1/64 |
# | |
# +--------------------+
ALL_TESTS="
ping_ipv4
ping_ipv6
max_mtu_config_test
max_mtu_traffic_test
min_mtu_config_test
min_mtu_traffic_test
"
NUM_NETIFS=2
source lib.sh
h1_create()
{
simple_if_init $h1
vlan_create $h1 10 v$h1 192.0.2.2/24 2001:db8:1::2/64
}
h1_destroy()
{
vlan_destroy $h1 10 192.0.2.2/24 2001:db8:1::2/64
simple_if_fini $h1
}
switch_create()
{
ip li set dev $swp1 up
vlan_create $swp1 10 "" 192.0.2.1/24 2001:db8:1::1/64
}
switch_destroy()
{
ip li set dev $swp1 down
vlan_destroy $swp1 10
}
setup_prepare()
{
h1=${NETIFS[p1]}
swp1=${NETIFS[p2]}
vrf_prepare
h1_create
switch_create
forwarding_enable
}
cleanup()
{
pre_cleanup
forwarding_restore
switch_destroy
h1_destroy
vrf_cleanup
}
ping_ipv4()
{
ping_test $h1.10 192.0.2.1
}
ping_ipv6()
{
ping6_test $h1.10 2001:db8:1::1
}
min_max_mtu_get_if()
{
local dev=$1; shift
local min_max=$1; shift
ip -d -j link show $dev | jq ".[].$min_max"
}
ensure_compatible_min_max_mtu()
{
local min_max=$1; shift
local mtu=$(min_max_mtu_get_if ${NETIFS[p1]} $min_max)
local i
for ((i = 2; i <= NUM_NETIFS; ++i)); do
local current_mtu=$(min_max_mtu_get_if ${NETIFS[p$i]} $min_max)
if [ $current_mtu -ne $mtu ]; then
return 1
fi
done
}
mtu_set_if()
{
local dev=$1; shift
local mtu=$1; shift
local should_fail=${1:-0}; shift
mtu_set $dev $mtu 2>/dev/null
check_err_fail $should_fail $? "Set MTU $mtu for $dev"
}
mtu_set_all_if()
{
local mtu=$1; shift
local i
for ((i = 1; i <= NUM_NETIFS; ++i)); do
mtu_set_if ${NETIFS[p$i]} $mtu
mtu_set_if ${NETIFS[p$i]}.10 $mtu
done
}
mtu_restore_all_if()
{
local i
for ((i = 1; i <= NUM_NETIFS; ++i)); do
mtu_restore ${NETIFS[p$i]}.10
mtu_restore ${NETIFS[p$i]}
done
}
mtu_test_ping4()
{
local mtu=$1; shift
local should_fail=$1; shift
# Ping adds 8 bytes for ICMP header and 20 bytes for IP header
local ping_headers_len=$((20 + 8))
local pkt_size=$((mtu - ping_headers_len))
ping_do $h1.10 192.0.2.1 "-s $pkt_size -M do"
check_err_fail $should_fail $? "Ping, packet size: $pkt_size"
}
mtu_test_ping6()
{
local mtu=$1; shift
local should_fail=$1; shift
# Ping adds 8 bytes for ICMP header and 40 bytes for IPv6 header
local ping6_headers_len=$((40 + 8))
local pkt_size=$((mtu - ping6_headers_len))
ping6_do $h1.10 2001:db8:1::1 "-s $pkt_size -M do"
check_err_fail $should_fail $? "Ping6, packet size: $pkt_size"
}
max_mtu_config_test()
{
local i
RET=0
for ((i = 1; i <= NUM_NETIFS; ++i)); do
local dev=${NETIFS[p$i]}
local max_mtu=$(min_max_mtu_get_if $dev "max_mtu")
local should_fail
should_fail=0
mtu_set_if $dev $max_mtu $should_fail
mtu_restore $dev
should_fail=1
mtu_set_if $dev $((max_mtu + 1)) $should_fail
mtu_restore $dev
done
log_test "Test maximum MTU configuration"
}
max_mtu_traffic_test()
{
local should_fail
local max_mtu
RET=0
if ! ensure_compatible_min_max_mtu "max_mtu"; then
log_test_xfail "Topology has incompatible maximum MTU values"
return
fi
max_mtu=$(min_max_mtu_get_if ${NETIFS[p1]} "max_mtu")
should_fail=0
mtu_set_all_if $max_mtu
mtu_test_ping4 $max_mtu $should_fail
mtu_test_ping6 $max_mtu $should_fail
mtu_restore_all_if
should_fail=1
mtu_set_all_if $((max_mtu - 1))
mtu_test_ping4 $max_mtu $should_fail
mtu_test_ping6 $max_mtu $should_fail
mtu_restore_all_if
log_test "Test traffic, packet size is maximum MTU"
}
min_mtu_config_test()
{
local i
RET=0
for ((i = 1; i <= NUM_NETIFS; ++i)); do
local dev=${NETIFS[p$i]}
local min_mtu=$(min_max_mtu_get_if $dev "min_mtu")
local should_fail
should_fail=0
mtu_set_if $dev $min_mtu $should_fail
mtu_restore $dev
should_fail=1
mtu_set_if $dev $((min_mtu - 1)) $should_fail
mtu_restore $dev
done
log_test "Test minimum MTU configuration"
}
min_mtu_traffic_test()
{
local should_fail=0
local min_mtu
RET=0
if ! ensure_compatible_min_max_mtu "min_mtu"; then
log_test_xfail "Topology has incompatible minimum MTU values"
return
fi
min_mtu=$(min_max_mtu_get_if ${NETIFS[p1]} "min_mtu")
mtu_set_all_if $min_mtu
mtu_test_ping4 $min_mtu $should_fail
# Do not test minimum MTU with IPv6, as IPv6 requires higher MTU.
mtu_restore_all_if
log_test "Test traffic, packet size is minimum MTU"
}
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS
|
