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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
lib_dir=$(dirname $0)/../../../net
source $lib_dir/lib.sh
NSIM_DEV_1_ID=$((256 + RANDOM % 256))
NSIM_DEV_1_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_DEV_1_ID
NSIM_DEV_2_ID=$((512 + RANDOM % 256))
NSIM_DEV_2_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_DEV_2_ID
NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device
NSIM_DEV_SYS_DEL=/sys/bus/netdevsim/del_device
NSIM_DEV_SYS_LINK=/sys/bus/netdevsim/link_device
NSIM_DEV_SYS_UNLINK=/sys/bus/netdevsim/unlink_device
socat_check()
{
if [ ! -x "$(command -v socat)" ]; then
echo "socat command not found. Skipping test"
return 1
fi
return 0
}
setup_ns()
{
set -e
ip netns add nssv
ip netns add nscl
NSIM_DEV_1_NAME=$(find $NSIM_DEV_1_SYS/net -maxdepth 1 -type d ! \
-path $NSIM_DEV_1_SYS/net -exec basename {} \;)
NSIM_DEV_2_NAME=$(find $NSIM_DEV_2_SYS/net -maxdepth 1 -type d ! \
-path $NSIM_DEV_2_SYS/net -exec basename {} \;)
ip link set $NSIM_DEV_1_NAME netns nssv
ip link set $NSIM_DEV_2_NAME netns nscl
ip netns exec nssv ip addr add '192.168.1.1/24' dev $NSIM_DEV_1_NAME
ip netns exec nscl ip addr add '192.168.1.2/24' dev $NSIM_DEV_2_NAME
ip netns exec nssv ip link set dev $NSIM_DEV_1_NAME up
ip netns exec nscl ip link set dev $NSIM_DEV_2_NAME up
set +e
}
cleanup_ns()
{
ip netns del nscl
ip netns del nssv
}
is_carrier_up()
{
local netns="$1"
local nsim_dev="$2"
test "$(ip netns exec "$netns" \
cat /sys/class/net/"$nsim_dev"/carrier 2>/dev/null)" -eq 1
}
assert_carrier_up()
{
local netns="$1"
local nsim_dev="$2"
if ! is_carrier_up "$netns" "$nsim_dev"; then
echo "$nsim_dev's carrier should be UP, but it isn't"
cleanup_ns
exit 1
fi
}
assert_carrier_down()
{
local netns="$1"
local nsim_dev="$2"
if is_carrier_up "$netns" "$nsim_dev"; then
echo "$nsim_dev's carrier should be DOWN, but it isn't"
cleanup_ns
exit 1
fi
}
###
### Code start
###
socat_check || exit 4
modprobe netdevsim
# linking
echo $NSIM_DEV_1_ID > $NSIM_DEV_SYS_NEW
echo $NSIM_DEV_2_ID > $NSIM_DEV_SYS_NEW
udevadm settle
setup_ns
NSIM_DEV_1_FD=$((256 + RANDOM % 256))
exec {NSIM_DEV_1_FD}</var/run/netns/nssv
NSIM_DEV_1_IFIDX=$(ip netns exec nssv cat /sys/class/net/$NSIM_DEV_1_NAME/ifindex)
NSIM_DEV_2_FD=$((256 + RANDOM % 256))
exec {NSIM_DEV_2_FD}</var/run/netns/nscl
NSIM_DEV_2_IFIDX=$(ip netns exec nscl cat /sys/class/net/$NSIM_DEV_2_NAME/ifindex)
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:2000" > $NSIM_DEV_SYS_LINK 2>/dev/null
if [ $? -eq 0 ]; then
echo "linking with non-existent netdevsim should fail"
cleanup_ns
exit 1
fi
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX 2000:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK 2>/dev/null
if [ $? -eq 0 ]; then
echo "linking with non-existent netnsid should fail"
cleanup_ns
exit 1
fi
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > $NSIM_DEV_SYS_LINK 2>/dev/null
if [ $? -eq 0 ]; then
echo "linking with self should fail"
cleanup_ns
exit 1
fi
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK
if [ $? -ne 0 ]; then
echo "linking netdevsim1 with netdevsim2 should succeed"
cleanup_ns
exit 1
fi
# argument error checking
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:a" > $NSIM_DEV_SYS_LINK 2>/dev/null
if [ $? -eq 0 ]; then
echo "invalid arg should fail"
cleanup_ns
exit 1
fi
# netdevsim carrier state consistency checking
assert_carrier_up nssv "$NSIM_DEV_1_NAME"
assert_carrier_up nscl "$NSIM_DEV_2_NAME"
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > "$NSIM_DEV_SYS_UNLINK"
assert_carrier_down nssv "$NSIM_DEV_1_NAME"
assert_carrier_down nscl "$NSIM_DEV_2_NAME"
ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" down
ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" up
assert_carrier_down nssv "$NSIM_DEV_1_NAME"
assert_carrier_down nscl "$NSIM_DEV_2_NAME"
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK
assert_carrier_up nssv "$NSIM_DEV_1_NAME"
assert_carrier_up nscl "$NSIM_DEV_2_NAME"
ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" down
ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" up
assert_carrier_up nssv "$NSIM_DEV_1_NAME"
assert_carrier_up nscl "$NSIM_DEV_2_NAME"
# send/recv packets
tmp_file=$(mktemp)
ip netns exec nssv socat TCP-LISTEN:1234,fork $tmp_file &
pid=$!
res=0
wait_local_port_listen nssv 1234 tcp
echo "HI" | ip netns exec nscl socat STDIN TCP:192.168.1.1:1234
count=$(cat $tmp_file | wc -c)
if [[ $count -ne 3 ]]; then
echo "expected 3 bytes, got $count"
res=1
fi
echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > $NSIM_DEV_SYS_UNLINK
echo $NSIM_DEV_2_ID > $NSIM_DEV_SYS_DEL
kill $pid
echo $NSIM_DEV_1_ID > $NSIM_DEV_SYS_DEL
cleanup_ns
modprobe -r netdevsim
exit $res
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