# $FreeBSD$
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2020 The FreeBSD Foundation
#
# This software was developed by Kristof Provost under sponsorship
# from the FreeBSD Foundation.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

. $(atf_get_srcdir)/../common/vnet.subr

atf_test_case "bridge_transmit_ipv4_unicast" "cleanup"
bridge_transmit_ipv4_unicast_head()
{
	atf_set descr 'bridge_transmit_ipv4_unicast bridging test'
	atf_set require.user root
}

bridge_transmit_ipv4_unicast_body()
{
	vnet_init

	epair_alcatraz=$(vnet_mkepair)
	epair_singsing=$(vnet_mkepair)

	vnet_mkjail alcatraz ${epair_alcatraz}b
	vnet_mkjail singsing ${epair_singsing}b

	jexec alcatraz ifconfig ${epair_alcatraz}b 192.0.2.1/24 up
	jexec singsing ifconfig ${epair_singsing}b 192.0.2.2/24 up

	bridge=$(vnet_mkbridge)

	ifconfig ${bridge} up
	ifconfig ${epair_alcatraz}a up
	ifconfig ${epair_singsing}a up
	ifconfig ${bridge} addm ${epair_alcatraz}a
	ifconfig ${bridge} addm ${epair_singsing}a

	atf_check -s exit:0 -o ignore jexec alcatraz ping -c 3 -t 1 192.0.2.2
	atf_check -s exit:0 -o ignore jexec singsing ping -c 3 -t 1 192.0.2.1
}

bridge_transmit_ipv4_unicast_cleanup()
{
	vnet_cleanup
}

atf_test_case "stp" "cleanup"
stp_head()
{
	atf_set descr 'Spanning tree test'
	atf_set require.user root
}

stp_body()
{
	vnet_init

	epair_one=$(vnet_mkepair)
	epair_two=$(vnet_mkepair)
	bridge_a=$(vnet_mkbridge)
	bridge_b=$(vnet_mkbridge)

	vnet_mkjail a ${bridge_a} ${epair_one}a ${epair_two}a
	vnet_mkjail b ${bridge_b} ${epair_one}b ${epair_two}b

	jexec a ifconfig ${epair_one}a up
	jexec a ifconfig ${epair_two}a up
	jexec a ifconfig ${bridge_a} addm ${epair_one}a
	jexec a ifconfig ${bridge_a} addm ${epair_two}a

	jexec b ifconfig ${epair_one}b up
	jexec b ifconfig ${epair_two}b up
	jexec b ifconfig ${bridge_b} addm ${epair_one}b
	jexec b ifconfig ${bridge_b} addm ${epair_two}b

	jexec a ifconfig ${bridge_a} 192.0.2.1/24

	# Enable spanning tree
	jexec a ifconfig ${bridge_a} stp ${epair_one}a
	jexec a ifconfig ${bridge_a} stp ${epair_two}a
	jexec b ifconfig ${bridge_b} stp ${epair_one}b
	jexec b ifconfig ${bridge_b} stp ${epair_two}b

	jexec b ifconfig ${bridge_b} up
	jexec a ifconfig ${bridge_a} up

	# Give STP time to do its thing
	sleep 5

	a_discard=$(jexec a ifconfig ${bridge_a} | grep discarding)
	b_discard=$(jexec b ifconfig ${bridge_b} | grep discarding)

	if [ -z "${a_discard}" ] && [ -z "${b_discard}" ]
	then
		atf_fail "STP failed to detect bridging loop"
	fi

	# We must also have at least some forwarding interfaces
	a_forwarding=$(jexec a ifconfig ${bridge_a} | grep forwarding)
	b_forwarding=$(jexec b ifconfig ${bridge_b} | grep forwarding)

	if [ -z "${a_forwarding}" ] && [ -z "${b_forwarding}" ]
	then
		atf_fail "STP failed to detect bridging loop"
	fi
}

stp_cleanup()
{
	vnet_cleanup
}

atf_test_case "stp_vlan" "cleanup"
stp_vlan_head()
{
	atf_set descr 'Spanning tree on VLAN test'
	atf_set require.user root
}

stp_vlan_body()
{
	vnet_init

	epair_one=$(vnet_mkepair)
	epair_two=$(vnet_mkepair)
	bridge_a=$(vnet_mkbridge)
	bridge_b=$(vnet_mkbridge)

	vnet_mkjail a ${bridge_a} ${epair_one}a ${epair_two}a
	vnet_mkjail b ${bridge_b} ${epair_one}b ${epair_two}b

	jexec a ifconfig ${epair_one}a up
	jexec a ifconfig ${epair_two}a up
	vlan_a_one=$(jexec a ifconfig vlan create vlandev ${epair_one}a vlan 42)
	vlan_a_two=$(jexec a ifconfig vlan create vlandev ${epair_two}a vlan 42)
	jexec a ifconfig ${vlan_a_one} up
	jexec a ifconfig ${vlan_a_two} up
	jexec a ifconfig ${bridge_a} addm ${vlan_a_one}
	jexec a ifconfig ${bridge_a} addm ${vlan_a_two}

	jexec b ifconfig ${epair_one}b up
	jexec b ifconfig ${epair_two}b up
	vlan_b_one=$(jexec b ifconfig vlan create vlandev ${epair_one}b vlan 42)
	vlan_b_two=$(jexec b ifconfig vlan create vlandev ${epair_two}b vlan 42)
	jexec b ifconfig ${vlan_b_one} up
	jexec b ifconfig ${vlan_b_two} up
	jexec b ifconfig ${bridge_b} addm ${vlan_b_one}
	jexec b ifconfig ${bridge_b} addm ${vlan_b_two}

	jexec a ifconfig ${bridge_a} 192.0.2.1/24

	# Enable spanning tree
	jexec a ifconfig ${bridge_a} stp ${vlan_a_one}
	jexec a ifconfig ${bridge_a} stp ${vlan_a_two}
	jexec b ifconfig ${bridge_b} stp ${vlan_b_one}
	jexec b ifconfig ${bridge_b} stp ${vlan_b_two}

	jexec b ifconfig ${bridge_b} up
	jexec a ifconfig ${bridge_a} up

	# Give STP time to do its thing
	sleep 5

	a_discard=$(jexec a ifconfig ${bridge_a} | grep discarding)
	b_discard=$(jexec b ifconfig ${bridge_b} | grep discarding)

	if [ -z "${a_discard}" ] && [ -z "${b_discard}" ]
	then
		atf_fail "STP failed to detect bridging loop"
	fi

	# We must also have at least some forwarding interfaces
	a_forwarding=$(jexec a ifconfig ${bridge_a} | grep forwarding)
	b_forwarding=$(jexec b ifconfig ${bridge_b} | grep forwarding)

	if [ -z "${a_forwarding}" ] && [ -z "${b_forwarding}" ]
	then
		atf_fail "STP failed to detect bridging loop"
	fi
}

stp_vlan_cleanup()
{
	vnet_cleanup
}

atf_test_case "static" "cleanup"
static_head()
{
	atf_set descr 'Bridge static address test'
	atf_set require.user root
}

static_body()
{
	vnet_init

	epair=$(vnet_mkepair)
	bridge=$(vnet_mkbridge)

	vnet_mkjail one ${bridge} ${epair}a

	ifconfig ${epair}b up

	jexec one ifconfig ${bridge} up
	jexec one ifconfig ${epair}a up
	jexec one ifconfig ${bridge} addm ${epair}a

	# Wrong interface
	atf_check -s exit:1 -o ignore -e ignore \
	    jexec one ifconfig ${bridge} static ${epair}b 00:01:02:03:04:05

	# Bad address format
	atf_check -s exit:1 -o ignore -e ignore \
	    jexec one ifconfig ${bridge} static ${epair}a 00:01:02:03:04

	# Correct add
	atf_check -s exit:0 -o ignore \
	    jexec one ifconfig ${bridge} static ${epair}a 00:01:02:03:04:05

	# List addresses
	atf_check -s exit:0 -o ignore \
	    jexec one ifconfig ${bridge} addr

	# Delete with bad address format
	atf_check -s exit:1 -o ignore -e ignore \
	    jexec one ifconfig ${bridge} deladdr 00:01:02:03:04

	# Delete with unlisted address
	atf_check -s exit:1 -o ignore -e ignore \
	    jexec one ifconfig ${bridge} deladdr 00:01:02:03:04:06

	# Correct delete
	atf_check -s exit:0 -o ignore \
	    jexec one ifconfig ${bridge} deladdr 00:01:02:03:04:05
}

static_cleanup()
{
	vnet_cleanup
}

atf_test_case "span" "cleanup"
span_head()
{
	atf_set descr 'Bridge span test'
	atf_set require.user root
}

span_body()
{
	set -x
	vnet_init

	if [ "$(atf_config_get ci false)" = "true" ]; then
		atf_skip "https://bugs.freebsd.org/260461"
	fi

	epair=$(vnet_mkepair)
	epair_span=$(vnet_mkepair)
	bridge=$(vnet_mkbridge)

	vnet_mkjail one ${bridge} ${epair}a ${epair_span}a

	ifconfig ${epair}b up
	ifconfig ${epair_span}b up

	jexec one ifconfig ${bridge} up
	jexec one ifconfig ${epair}a up
	jexec one ifconfig ${epair_span}a up
	jexec one ifconfig ${bridge} addm ${epair}a

	jexec one ifconfig ${bridge} span ${epair_span}a
	jexec one ifconfig ${bridge} 192.0.2.1/24

	# Send some traffic through the span
	jexec one ping -c 1 -t 1 192.0.2.2

	# Check that we see the traffic on the span interface
	atf_check -s exit:0 \
		$(atf_get_srcdir)/../netpfil/common/pft_ping.py \
		--sendif ${epair}b \
		--to 192.0.2.2 \
		--recvif ${epair_span}b

	jexec one ifconfig ${bridge} -span ${epair_span}a

	# And no more traffic after we remove the span
	atf_check -s exit:1 \
		$(atf_get_srcdir)/../netpfil/common/pft_ping.py \
		--sendif ${epair}b \
		--to 192.0.2.2 \
		--recvif ${epair_span}b
}

span_cleanup()
{
	vnet_cleanup
}

atf_test_case "delete_with_members" "cleanup"
delete_with_members_head()
{
	atf_set descr 'Delete a bridge which still has member interfaces'
	atf_set require.user root
}

delete_with_members_body()
{
	vnet_init

	bridge=$(vnet_mkbridge)
	epair=$(vnet_mkepair)

	ifconfig ${bridge} 192.0.2.1/24 up
	ifconfig ${epair}a up
	ifconfig ${bridge} addm ${epair}a

	ifconfig ${bridge} destroy
}

delete_with_members_cleanup()
{
	vnet_cleanup
}

atf_test_case "mac_conflict" "cleanup"
mac_conflict_head()
{
	atf_set descr 'Ensure that bridges in different jails get different mac addresses'
	atf_set require.user root
}

mac_conflict_body()
{
	vnet_init

	epair=$(vnet_mkepair)

	# Ensure the bridge module is loaded so jails can use it.
	tmpbridge=$(vnet_mkbridge)

	vnet_mkjail bridge_mac_conflict_one ${epair}a
	vnet_mkjail bridge_mac_conflict_two ${epair}b

	jexec bridge_mac_conflict_one ifconfig bridge create
	jexec bridge_mac_conflict_one ifconfig bridge0 192.0.2.1/24 up \
	    addm ${epair}a
	jexec bridge_mac_conflict_one ifconfig ${epair}a up

	jexec bridge_mac_conflict_two ifconfig bridge create
	jexec bridge_mac_conflict_two ifconfig bridge0 192.0.2.2/24 up \
	    addm ${epair}b
	jexec bridge_mac_conflict_two ifconfig ${epair}b up

	atf_check -s exit:0 -o ignore \
	    jexec bridge_mac_conflict_one ping -c 3 192.0.2.2
}

mac_conflict_cleanup()
{
	vnet_cleanup
}

atf_test_case "inherit_mac" "cleanup"
inherit_mac_head()
{
	atf_set descr 'Bridge inherit_mac test, #216510'
	atf_set require.user root
}

inherit_mac_body()
{
	vnet_init

	bridge=$(vnet_mkbridge)
	epair=$(vnet_mkepair)
	vnet_mkjail one ${bridge} ${epair}a

	jexec one sysctl net.link.bridge.inherit_mac=1

	# Attempt to provoke the panic described in #216510
	jexec one ifconfig ${bridge} 192.0.0.1/24 up
	jexec one ifconfig ${bridge} addm ${epair}a
}

inherit_mac_cleanup()
{
	vnet_cleanup
}

atf_test_case "stp_validation" "cleanup"
stp_validation_head()
{
	atf_set descr 'Check STP validation'
	atf_set require.user root
	atf_set require.progs scapy
}

stp_validation_body()
{
	vnet_init

	epair_one=$(vnet_mkepair)
	epair_two=$(vnet_mkepair)
	bridge=$(vnet_mkbridge)

	ifconfig ${bridge} up
	ifconfig ${bridge} addm ${epair_one}a addm ${epair_two}a
	ifconfig ${bridge} stp ${epair_one}a stp ${epair_two}a

	ifconfig ${epair_one}a up
	ifconfig ${epair_one}b up
	ifconfig ${epair_two}a up
	ifconfig ${epair_two}b up

	# Wait until the interfaces are no longer discarding
	while ifconfig ${bridge} | grep 'state discarding' >/dev/null
	do
		sleep 1
	done

	# Now inject invalid STP BPDUs on epair_one and see if they're repeated
	# on epair_two
	atf_check -s exit:0 \
	    $(atf_get_srcdir)/stp.py \
	    --sendif ${epair_one}b \
	    --recvif ${epair_two}b
}

stp_validation_cleanup()
{
	vnet_cleanup
}

atf_test_case "gif" "cleanup"
gif_head()
{
	atf_set descr 'gif as a bridge member'
	atf_set require.user root
}

gif_body()
{
	vnet_init

	epair=$(vnet_mkepair)

	vnet_mkjail one ${epair}a
	vnet_mkjail two ${epair}b

	jexec one sysctl net.link.gif.max_nesting=2
	jexec two sysctl net.link.gif.max_nesting=2

	jexec one ifconfig ${epair}a 192.0.2.1/24 up
	jexec two ifconfig ${epair}b 192.0.2.2/24 up

	# Tunnel
	gif_one=$(jexec one ifconfig gif create)
	gif_two=$(jexec two ifconfig gif create)

	jexec one ifconfig ${gif_one} tunnel 192.0.2.1 192.0.2.2
	jexec one ifconfig ${gif_one} up
	jexec two ifconfig ${gif_two} tunnel 192.0.2.2 192.0.2.1
	jexec two ifconfig ${gif_two} up

	bridge_one=$(jexec one ifconfig bridge create)
	bridge_two=$(jexec two ifconfig bridge create)
	jexec one ifconfig ${bridge_one} 198.51.100.1/24 up
	jexec one ifconfig ${bridge_one} addm ${gif_one}
	jexec two ifconfig ${bridge_two} 198.51.100.2/24 up
	jexec two ifconfig ${bridge_two} addm ${gif_two}

	# Sanity check
	atf_check -s exit:0 -o ignore \
		jexec one ping -c 1 192.0.2.2

	# Test tunnel
	atf_check -s exit:0 -o ignore \
		jexec one ping -c 1 198.51.100.2
	atf_check -s exit:0 -o ignore \
		jexec one ping -c 1 -s 1200 198.51.100.2
	atf_check -s exit:0 -o ignore \
		jexec one ping -c 1 -s 2000 198.51.100.2

	# Higher MTU on the tunnel than on the underlying interface
	jexec one ifconfig ${epair}a mtu 1000
	jexec two ifconfig ${epair}b mtu 1000

	atf_check -s exit:0 -o ignore \
		jexec one ping -c 1 -s 1200 198.51.100.2
	atf_check -s exit:0 -o ignore \
		jexec one ping -c 1 -s 2000 198.51.100.2
}

gif_cleanup()
{
	vnet_cleanup
}

atf_test_case "mtu" "cleanup"
mtu_head()
{
	atf_set descr 'Bridge MTU changes'
	atf_set require.user root
}

get_mtu()
{
	intf=$1

	ifconfig ${intf} ether | awk '$5 == "mtu" { print $6 }'
}

check_mtu()
{
	intf=$1
	expected=$2

	mtu=$(get_mtu $intf)
	if [ $mtu -ne $expected ];
	then
		atf_fail "Expected MTU of $expected on $intf but found $mtu"
	fi
}

mtu_body()
{
	vnet_init

	epair=$(vnet_mkepair)
	gif=$(ifconfig gif create)
	echo ${gif} >> created_interfaces.lst
	bridge=$(vnet_mkbridge)

	atf_check -s exit:0 \
		ifconfig ${bridge} addm ${epair}a

	ifconfig ${gif} mtu 1500
	atf_check -s exit:0 \
		ifconfig ${bridge} addm ${gif}

	# Changing MTU changes it for all member interfaces
	atf_check -s exit:0 \
		ifconfig ${bridge} mtu 2000

	check_mtu ${bridge} 2000
	check_mtu ${gif} 2000
	check_mtu ${epair}a 2000

	# Rejected MTUs mean none of the MTUs change
	atf_check -s exit:1 -e ignore \
		ifconfig ${bridge} mtu 9000

	check_mtu ${bridge} 2000
	check_mtu ${gif} 2000
	check_mtu ${epair}a 2000

	# We're not allowed to change the MTU of a member interface
	atf_check -s exit:1 -e ignore \
		ifconfig ${epair}a mtu 1900
	check_mtu ${epair}a 2000

	# Test adding an interface with a different MTU
	new_epair=$(vnet_mkepair)
	check_mtu ${new_epair}a 1500
	atf_check -s exit:0 -e ignore \
		ifconfig ${bridge} addm ${new_epair}a

	check_mtu ${bridge} 2000
	check_mtu ${gif} 2000
	check_mtu ${epair}a 2000
	check_mtu ${new_epair}a 2000
}

mtu_cleanup()
{
	vnet_cleanup
}

atf_init_test_cases()
{
	atf_add_test_case "bridge_transmit_ipv4_unicast"
	atf_add_test_case "stp"
	atf_add_test_case "stp_vlan"
	atf_add_test_case "static"
	atf_add_test_case "span"
	atf_add_test_case "inherit_mac"
	atf_add_test_case "delete_with_members"
	atf_add_test_case "mac_conflict"
	atf_add_test_case "stp_validation"
	atf_add_test_case "gif"
	atf_add_test_case "mtu"
}