#       $NetBSD: t_arp.sh,v 1.48 2024/09/09 07:26:42 ozaki-r Exp $
#
# Copyright (c) 2015 The NetBSD Foundation, Inc.
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SOCKSRC=unix://commsock1
SOCKDST=unix://commsock2
IP4SRC=10.0.1.1
IP4SRC2=10.0.1.5
IP4NET=10.0.1.0
IP4DST=10.0.1.2
IP4DST_PROXYARP1=10.0.1.3
IP4DST_PROXYARP2=10.0.1.4
IP4DST_FAIL1=10.0.1.99
IP4DST_FAIL2=10.0.99.99

DEBUG=${DEBUG:-false}
TIMEOUT=1

setup_dst_server()
{

       rump_server_add_iface $SOCKDST shmif0 bus1
       export RUMP_SERVER=$SOCKDST
       atf_check -s exit:0 rump.ifconfig shmif0 inet $IP4DST/24
       atf_check -s exit:0 rump.ifconfig shmif0 up
       atf_check -s exit:0 rump.ifconfig -w 10

       $DEBUG && rump.ifconfig shmif0
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
}

setup_src_server()
{
       local keep=${1:-0}

       export RUMP_SERVER=$SOCKSRC

       # Shorten the expire time of cache entries
       if [ $keep != 0 ]; then
               # Convert to ms
               keep=$(($keep * 1000))
               atf_check -s exit:0 -o ignore \
                   rump.sysctl -w net.inet.arp.nd_reachable=$keep
       fi

       # Setup an interface
       rump_server_add_iface $SOCKSRC shmif0 bus1
       atf_check -s exit:0 rump.ifconfig shmif0 inet $IP4SRC/24
       atf_check -s exit:0 rump.ifconfig shmif0 up
       atf_check -s exit:0 rump.ifconfig -w 10

       # Sanity check
       $DEBUG && rump.ifconfig shmif0
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4SRC
       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4DST
}

get_timeout()
{
       local addr="$1"
       local timeout=$(env RUMP_SERVER=$SOCKSRC rump.arp -n $addr |grep $addr|awk '{print $7;}')
       timeout=${timeout%s}
       echo $timeout
}

test_cache_expiration()
{
       local arp_keep=7

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server $arp_keep

       # Make a permanent cache entry to avoid sending an NS packet disturbing
       # the test
       macaddr=$(get_macaddr $SOCKSRC shmif0)
       export RUMP_SERVER=$SOCKDST
       atf_check -s exit:0 -o ignore rump.arp -s $IP4SRC $macaddr

       export RUMP_SERVER=$SOCKSRC

       #
       # Check if a cache is expired expectedly
       #
       atf_check -s exit:0 -o ignore rump.ping -n -w $TIMEOUT -c 1 $IP4DST

       $DEBUG && rump.arp -n -a
       atf_check -s not-exit:0 -o ignore -e match:'no entry' rump.arp -n $IP4SRC
       # Should be cached
       atf_check -s exit:0 -o not-match:'permanent' rump.arp -n $IP4DST

       timeout=$(get_timeout $IP4DST)

       atf_check -s exit:0 sleep $(($timeout + 1))

       $DEBUG && rump.arp -n -a
       atf_check -s not-exit:0 -o ignore -e match:'no entry' rump.arp -n $IP4SRC
       # Expired but remains until GC sweaps it (1 day)
       atf_check -s exit:0 -o match:"$ONEDAYISH" rump.arp -n $IP4DST

       rump_server_destroy_ifaces
}

check_arp_static_entry()
{
       local ip=$1
       local mac=$2
       local type=$3
       local flags=

       atf_check -s exit:0 -o match:"$mac" rump.arp -n $ip
       if [ $type = 'permanent' ]; then
               atf_check -s exit:0 -o match:'permanent' rump.arp -n $ip
               check_route $ip "$mac" UHLS shmif0
       else
               atf_check -s exit:0 -o not-match:'permanent' rump.arp -n $ip
               check_route $ip "$mac" UHL shmif0
       fi
}

test_command()
{
       local arp_keep=5
       local bonus=2

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server $arp_keep

       export RUMP_SERVER=$SOCKSRC

       # Add and delete a static entry
       $DEBUG && rump.arp -n -a
       atf_check -s exit:0 -o ignore rump.arp -s 10.0.1.10 b2:a0:20:00:00:10
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
       check_arp_static_entry 10.0.1.10 'b2:a0:20:00:00:10' permanent
       atf_check -s exit:0 -o ignore rump.arp -d 10.0.1.10
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
       atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.10
       check_route_no_entry 10.0.1.10

       # Add multiple entries via a file
       cat - > ./list <<-EOF
       10.0.1.11 b2:a0:20:00:00:11
       10.0.1.12 b2:a0:20:00:00:12
       10.0.1.13 b2:a0:20:00:00:13
       10.0.1.14 b2:a0:20:00:00:14
       10.0.1.15 b2:a0:20:00:00:15
       EOF
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
       atf_check -s exit:0 -o ignore rump.arp -f ./list
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
       check_arp_static_entry 10.0.1.11 'b2:a0:20:00:00:11' permanent
       check_arp_static_entry 10.0.1.12 'b2:a0:20:00:00:12' permanent
       check_arp_static_entry 10.0.1.13 'b2:a0:20:00:00:13' permanent
       check_arp_static_entry 10.0.1.14 'b2:a0:20:00:00:14' permanent
       check_arp_static_entry 10.0.1.15 'b2:a0:20:00:00:15' permanent

       # Test arp -a
       atf_check -s exit:0 -o match:'10.0.1.11' rump.arp -n -a
       atf_check -s exit:0 -o match:'10.0.1.12' rump.arp -n -a
       atf_check -s exit:0 -o match:'10.0.1.13' rump.arp -n -a
       atf_check -s exit:0 -o match:'10.0.1.14' rump.arp -n -a
       atf_check -s exit:0 -o match:'10.0.1.15' rump.arp -n -a

       # Flush all entries
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
       atf_check -s exit:0 -o ignore rump.arp -d -a
       atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.11
       atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.12
       atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.13
       atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.14
       atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.15
       atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.1
       check_route_no_entry 10.0.1.11
       check_route_no_entry 10.0.1.12
       check_route_no_entry 10.0.1.13
       check_route_no_entry 10.0.1.14
       check_route_no_entry 10.0.1.15

       # Test temp option
       $DEBUG && rump.arp -n -a
       atf_check -s exit:0 -o ignore rump.arp -s 10.0.1.10 b2:a0:20:00:00:10 temp
       $DEBUG && rump.arp -n -a
       $DEBUG && rump.netstat -nr -f inet
       check_arp_static_entry 10.0.1.10 'b2:a0:20:00:00:10' temp

       # Hm? the cache doesn't expire...
       #atf_check -s exit:0 sleep $(($arp_keep + $bonus))
       #$DEBUG && rump.arp -n -a
       #$DEBUG && rump.netstat -nr -f inet
       #atf_check -s not-exit:0 -e ignore rump.arp -n 10.0.1.10

       rump_server_destroy_ifaces
}

make_pkt_str_arpreq()
{
       local target=$1
       local sender=$2
       pkt="> ff:ff:ff:ff:ff:ff, ethertype ARP \(0x0806\), length 42:"
       pkt="$pkt Request who-has $target tell $sender, length 28"
       echo $pkt
}

test_garp_common()
{
       local no_dad=$1
       local pkt=

       rump_server_start $SOCKSRC

       export RUMP_SERVER=$SOCKSRC

       if $no_dad; then
               atf_check -s exit:0 -o match:'3 -> 0' \
                   rump.sysctl -w net.inet.ip.dad_count=0
       fi

       # Setup an interface
       rump_server_add_iface $SOCKSRC shmif0 bus1
       atf_check -s exit:0 rump.ifconfig shmif0 inet 10.0.0.1/24
       atf_check -s exit:0 rump.ifconfig shmif0 up
       $DEBUG && rump.ifconfig shmif0

       atf_check -s exit:0 sleep 1
       extract_new_packets bus1 > ./out

       #
       # Assign an address to an interface without IFF_UP
       #
       # A GARP packet is sent for the primary address
       pkt=$(make_pkt_str_arpreq 10.0.0.1 10.0.0.1)
       atf_check -s exit:0 -o match:"$pkt" cat ./out

       atf_check -s exit:0 rump.ifconfig shmif0 down
       atf_check -s exit:0 rump.ifconfig shmif0 inet 10.0.0.2/24 alias

       atf_check -s exit:0 sleep 1
       extract_new_packets bus1 > ./out

       # A GARP packet is sent for the alias address
       pkt=$(make_pkt_str_arpreq 10.0.0.2 10.0.0.2)
       atf_check -s exit:0 -o match:"$pkt" cat ./out

       # Clean up
       atf_check -s exit:0 rump.ifconfig shmif0 inet 10.0.0.1/24 delete
       atf_check -s exit:0 rump.ifconfig shmif0 inet 10.0.0.2/24 delete

       #
       # Assign an address to an interface with IFF_UP
       #
       atf_check -s exit:0 rump.ifconfig shmif0 up

       # Primary address
       atf_check -s exit:0 rump.ifconfig shmif0 inet 10.0.0.3/24

       atf_check -s exit:0 sleep 1
       extract_new_packets bus1 > ./out

       pkt=$(make_pkt_str_arpreq 10.0.0.3 10.0.0.3)
       if $no_dad; then
               # A GARP packet is sent
               atf_check -s exit:0 -o match:"$pkt" cat ./out
       else
               # No GARP packet is sent
               atf_check -s exit:0 -o not-match:"$pkt" cat ./out
       fi

       # Alias address
       atf_check -s exit:0 rump.ifconfig shmif0 inet 10.0.0.4/24 alias

       atf_check -s exit:0 sleep 1
       extract_new_packets bus1 > ./out

       pkt=$(make_pkt_str_arpreq 10.0.0.4 10.0.0.4)
       if $no_dad; then
               # A GARP packet is sent
               atf_check -s exit:0 -o match:"$pkt" cat ./out
       else
               # No GARP packet is sent
               atf_check -s exit:0 -o not-match:"$pkt" cat ./out
       fi

       #
       # GARP on Link up
       #
       atf_check -s exit:0 rump.ifconfig shmif0 media none
       extract_new_packets bus1 > ./out
       atf_check -s exit:0 rump.ifconfig shmif0 media auto

       atf_check -s exit:0 sleep 1
       extract_new_packets bus1 > ./out

       if $no_dad; then
               # A GARP packet is sent for both primary and alias addresses.
               pkt=$(make_pkt_str_arpreq 10.0.0.3 10.0.0.3)
               atf_check -s exit:0 -o match:"$pkt" cat ./out
               pkt=$(make_pkt_str_arpreq 10.0.0.4 10.0.0.4)
               atf_check -s exit:0 -o match:"$pkt" cat ./out
       else
               # No GARP is sent.
               pkt=$(make_pkt_str_arpreq 10.0.0.3 10.0.0.3)
               atf_check -s exit:0 -o not-match:"$pkt" cat ./out
               pkt=$(make_pkt_str_arpreq 10.0.0.4 10.0.0.4)
               atf_check -s exit:0 -o not-match:"$pkt" cat ./out
               # DAD packets are sent instead.
               pkt=$(make_pkt_str_arpreq 10.0.0.3 0.0.0.0)
               atf_check -s exit:0 -o match:"$pkt" cat ./out
               pkt=$(make_pkt_str_arpreq 10.0.0.4 0.0.0.0)
               atf_check -s exit:0 -o match:"$pkt" cat ./out
       fi

       rump_server_destroy_ifaces
}

test_garp()
{

       test_garp_common false
}

test_garp_without_dad()
{

       test_garp_common true
}

test_cache_overwriting()
{

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       export RUMP_SERVER=$SOCKSRC

       # Cannot overwrite a permanent cache
       atf_check -s exit:0 rump.arp -s $IP4DST b2:a0:20:00:00:ff
       $DEBUG && rump.arp -n -a
       atf_check -s not-exit:0 -e match:'File exists' \
           rump.arp -s $IP4DST b2:a0:20:00:00:fe
       # cleanup
       atf_check -s exit:0 rump.arp -d $IP4DST

       atf_check -s exit:0 -o ignore rump.ping -n -w $TIMEOUT -c 1 $IP4DST
       $DEBUG && rump.arp -n -a
       # Can overwrite a dynamic cache
       atf_check -s exit:0 -o ignore rump.arp -s $IP4DST b2:a0:20:00:00:00
       $DEBUG && rump.arp -n -a
       atf_check -s exit:0 -o match:'b2:a0:20:00:00:00' rump.arp -n $IP4DST
       atf_check -s exit:0 -o match:'permanent' rump.arp -n $IP4DST

       atf_check -s exit:0 -o ignore rump.arp -s 10.0.1.10 b2:a0:20:00:00:10 temp
       $DEBUG && rump.arp -n -a
       atf_check -s exit:0 -o match:'b2:a0:20:00:00:10' rump.arp -n 10.0.1.10
       atf_check -s exit:0 -o not-match:'permanent' rump.arp -n 10.0.1.10
       # Can overwrite a temp cache
       atf_check -s exit:0 -o ignore rump.arp -s 10.0.1.10 b2:a0:20:00:00:ff
       atf_check -s exit:0 -o match:'b2:a0:20:00:00:ff' rump.arp -n 10.0.1.10
       $DEBUG && rump.arp -n -a

       rump_server_destroy_ifaces
}

make_pkt_str_arprep()
{
       local ip=$1
       local mac=$2
       pkt="ethertype ARP (0x0806), length 42: "
       pkt="Reply $ip is-at $mac, length 28"
       echo $pkt
}

make_pkt_str_garp()
{
       local ip=$1
       local mac=$2
       local pkt=
       pkt="$mac > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806),"
       pkt="$pkt length 42: Request who-has $ip tell $ip, length 28"
       echo $pkt
}

test_proxy_arp()
{
       local opts= title= flags=
       local type=$1

       rump_server_start $SOCKSRC
       rump_server_fs_start $SOCKDST tap

       setup_dst_server
       setup_src_server

       export RUMP_SERVER=$SOCKDST
       atf_check -s exit:0 -o ignore rump.sysctl -w net.inet.ip.forwarding=1
       macaddr_dst=$(get_macaddr $SOCKDST shmif0)

       if [ "$type" = "pub" ]; then
               opts="pub"
       else
               opts="pub proxy"
       fi
       # Always proxy only since migrating to lltable/llentry
       title='published \(proxy only\)'

       #
       # Test#1: First setup an endpoint then create proxy arp entry
       #
       export RUMP_SERVER=$SOCKDST
       rump_server_add_iface $SOCKDST tap1
       atf_check -s exit:0 rump.ifconfig tap1 $IP4DST_PROXYARP1/24 up
       atf_check -s exit:0 rump.ifconfig -w 10

       # Try to ping (should fail w/o proxy arp)
       export RUMP_SERVER=$SOCKSRC
       atf_check -s not-exit:0 -o ignore -e ignore \
           rump.ping -n -w 1 -c 1 $IP4DST_PROXYARP1
       # Remove ARP entry as it may hang around in WAITDELETE a few seconds
       atf_check -s ignore rump.arp -d $IP4DST_PROXYARP1

       # Flushing
       extract_new_packets bus1 > ./out

       # Set up proxy ARP entry
       export RUMP_SERVER=$SOCKDST
       atf_check -s exit:0 -o ignore \
           rump.arp -s $IP4DST_PROXYARP1 $macaddr_dst $opts
       atf_check -s exit:0 -o match:"$title" rump.arp -n $IP4DST_PROXYARP1

       # Try to ping
       export RUMP_SERVER=$SOCKSRC
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST_PROXYARP1

       extract_new_packets bus1 > ./out
       $DEBUG && cat ./out

       pkt1=$(make_pkt_str_arprep $IP4DST_PROXYARP1 $macaddr_dst)
       pkt2=$(make_pkt_str_garp $IP4DST_PROXYARP1 $macaddr_dst)
       atf_check -s exit:0 -x "cat ./out |grep -q -e '$pkt1' -e '$pkt2'"

       #
       # Test#2: Create proxy arp entry then set up an endpoint
       #
       export RUMP_SERVER=$SOCKDST
       atf_check -s exit:0 -o ignore \
           rump.arp -s $IP4DST_PROXYARP2 $macaddr_dst $opts
       atf_check -s exit:0 -o match:"$title" rump.arp -n $IP4DST_PROXYARP2
       $DEBUG && rump.netstat -nr -f inet

       # Try to ping (should fail because no endpoint exists)
       export RUMP_SERVER=$SOCKSRC
       atf_check -s not-exit:0 -o ignore -e ignore \
           rump.ping -n -w 1 -c 1 $IP4DST_PROXYARP2
       # Remove ARP entry as it may hang around in WAITDELETE a few seconds
       atf_check -s ignore rump.arp -d $IP4DST_PROXYARP2

       extract_new_packets bus1 > ./out
       $DEBUG && cat ./out

       # ARP reply should be sent
       pkt=$(make_pkt_str_arprep $IP4DST_PROXYARP2 $macaddr_dst)
       atf_check -s exit:0 -x "cat ./out |grep -q '$pkt'"

       export RUMP_SERVER=$SOCKDST
       rump_server_add_iface $SOCKDST tap2
       atf_check -s exit:0 rump.ifconfig tap2 $IP4DST_PROXYARP2/24 up
       atf_check -s exit:0 rump.ifconfig -w 10

       # Try to ping
       export RUMP_SERVER=$SOCKSRC
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST_PROXYARP2
}

test_proxy_arp_pub()
{

       test_proxy_arp pub
       rump_server_destroy_ifaces
}

test_proxy_arp_pubproxy()
{

       test_proxy_arp pubproxy
       rump_server_destroy_ifaces
}

test_link_activation()
{

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       # flush old packets
       extract_new_packets bus1 > ./out

       export RUMP_SERVER=$SOCKSRC

       atf_check -s exit:0 -o ignore rump.ifconfig shmif0 link \
           b2:a1:00:00:00:01

       atf_check -s exit:0 sleep 1
       extract_new_packets bus1 > ./out
       $DEBUG && cat ./out

       pkt=$(make_pkt_str_arpreq $IP4SRC $IP4SRC)
       atf_check -s exit:0 -o not-match:"$pkt" cat ./out

       atf_check -s exit:0 -o ignore rump.ifconfig shmif0 link \
           b2:a1:00:00:00:02 active

       atf_check -s exit:0 sleep 1
       extract_new_packets bus1 > ./out
       $DEBUG && cat ./out

       pkt=$(make_pkt_str_arpreq $IP4SRC $IP4SRC)
       atf_check -s exit:0 -o match:"b2:a1:00:00:00:02 $pkt" cat ./out

       rump_server_destroy_ifaces
}

test_static()
{
       local macaddr_src=

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       macaddr_src=$(get_macaddr $SOCKSRC shmif0)

       # Set a (valid) static ARP entry for the src server
       export RUMP_SERVER=$SOCKDST
       $DEBUG && rump.arp -n -a
       atf_check -s exit:0 -o ignore rump.arp -s $IP4SRC $macaddr_src
       $DEBUG && rump.arp -n -a

       # Test receiving an ARP request with the static ARP entry (as spa/sha)
       export RUMP_SERVER=$SOCKSRC
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST

       rump_server_destroy_ifaces
}

test_rtm()
{
       local macaddr_src= macaddr_dst=
       local file=./tmp
       local pid= hdr= what= addr=

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       macaddr_src=$(get_macaddr $SOCKSRC shmif0)
       macaddr_dst=$(get_macaddr $SOCKDST shmif0)

       export RUMP_SERVER=$SOCKSRC

       # Test ping and a resulting routing message (RTM_ADD)
       rump.route -n monitor -c 1 > $file &
       pid=$!
       sleep 1
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST
       wait $pid
       $DEBUG && cat $file

       hdr="RTM_ADD.+<UP,HOST,DONE,LLINFO,CLONED>"
       what="<DST,GATEWAY>"
       addr="$IP4DST $macaddr_dst"
       atf_check -s exit:0 -o match:"$hdr" -o match:"$what" -o match:"$addr" \
               cat $file

       # Test ping and a resulting routing message (RTM_MISS) on subnet
       rump.route -n monitor -c 1 > $file &
       pid=$!
       sleep 1
       atf_check -s exit:2 -o ignore -e ignore \
               rump.ping -n -w 1 -c 1 $IP4DST_FAIL1
       wait $pid
       $DEBUG && cat $file

       hdr="RTM_MISS.+<DONE>"
       what="<DST,GATEWAY,AUTHOR>"
       addr="$IP4DST_FAIL1 link#2 $IP4SRC"
       atf_check -s exit:0 -o match:"$hdr" -o match:"$what" -o match:"$addr" \
               cat $file

       # Test ping and a resulting routing message (RTM_MISS) off subnet
       rump.route -n monitor -c 1 > $file &
       pid=$!
       sleep 1
       atf_check -s exit:2 -o ignore -e ignore \
               rump.ping -n -w 1 -c 1 $IP4DST_FAIL2
       wait $pid
       $DEBUG && cat $file

       hdr="RTM_MISS.+<DONE>"
       what="<DST>"
       addr="$IP4DST_FAIL2"
       atf_check -s exit:0 -o match:"$hdr" -o match:"$what" -o match:"$addr" \
               cat $file

       # Test arp -d and resulting routing messages (RTM_DELETE)
       rump.route -n monitor -c 1 > $file &
       pid=$!
       sleep 1
       atf_check -s exit:0 -o ignore rump.arp -d $IP4DST
       wait $pid
       $DEBUG && cat $file

       hdr="RTM_DELETE.+<HOST,DONE,LLINFO,CLONED>"
       what="<DST,GATEWAY>"
       addr="$IP4DST $macaddr_dst"
       atf_check -s exit:0 -o match:"$hdr" -o match:"$what" -o match:"$addr" \
               grep -A 3 RTM_DELETE $file

       rump_server_destroy_ifaces
}

test_purge_on_route_change()
{

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       rump_server_add_iface $SOCKSRC shmif1 bus1
       export RUMP_SERVER=$SOCKSRC
       atf_check -s exit:0 rump.ifconfig shmif1 inet $IP4SRC2/24
       atf_check -s exit:0 rump.ifconfig -w 10

       $DEBUG && rump.netstat -nr -f inet
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST
       $DEBUG && rump.arp -na
       atf_check -s exit:0 -o ignore \
           rump.route change -net $IP4NET -ifp shmif1
       $DEBUG && rump.netstat -nr -f inet
       $DEBUG && rump.arp -na
       # The entry was already removed on route change
       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4DST

       rump_server_destroy_ifaces
}

test_purge_on_route_delete()
{

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       $DEBUG && rump.netstat -nr -f inet
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST
       $DEBUG && rump.arp -na

       atf_check -s exit:0 -o ignore rump.route delete -net $IP4NET
       $DEBUG && rump.netstat -nr -f inet
       $DEBUG && rump.arp -na

       # The entry was already removed on route delete
       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4DST

       rump_server_destroy_ifaces
}

test_purge_on_ifdown()
{

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       $DEBUG && rump.netstat -nr -f inet
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST
       atf_check -s exit:0 -o match:'shmif0' rump.arp -n $IP4DST

       # Shutdown the interface
       atf_check -s exit:0 rump.ifconfig shmif0 down
       $DEBUG && rump.netstat -nr -f inet
       $DEBUG && rump.arp -na

       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4DST

       rump_server_destroy_ifaces
}

test_stray_entries()
{

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       setup_dst_server
       setup_src_server

       rump_server_add_iface $SOCKSRC shmif1 bus1

       export RUMP_SERVER=$SOCKSRC
       atf_check -s exit:0 rump.ifconfig shmif1 inet $IP4SRC2/24
       atf_check -s exit:0 rump.ifconfig -w 10

       $DEBUG && rump.netstat -nr -f inet
       atf_check -s exit:0 -o ignore rump.ping -n -w 1 -c 1 $IP4DST
       $DEBUG && rump.arp -na
       atf_check -s exit:0 -o match:'shmif0' rump.arp -n $IP4DST
       atf_check -s exit:0 -o not-match:'shmif1' rump.arp -n $IP4DST

       # Clean up
       atf_check -s exit:0 -o ignore rump.arp -da
       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4DST

       # ping from a different source address
       atf_check -s exit:0 -o ignore \
           rump.ping -n -w 1 -c 1 -I $IP4SRC2 $IP4DST
       $DEBUG && rump.arp -na
       atf_check -s exit:0 -o match:'shmif0' rump.arp -n $IP4DST
       # ARP reply goes back via shmif1, so a cache is created on shmif1
       atf_check -s exit:0 -o match:'shmif1' rump.arp -n $IP4DST

       # Clean up by arp -da
       atf_check -s exit:0 -o ignore rump.arp -da
       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4DST

       # ping from a different source address again
       atf_check -s exit:0 -o ignore \
           rump.ping -n -w 1 -c 1 -I $IP4SRC2 $IP4DST
       atf_check -s exit:0 -o match:'shmif0' rump.arp -n $IP4DST
       # ARP reply doen't come
       atf_check -s exit:0 -o not-match:'shmif1' rump.arp -n $IP4DST

       # Cleanup caches on the destination
       export RUMP_SERVER=$SOCKDST
       atf_check -s exit:0 -o ignore rump.arp -da
       export RUMP_SERVER=$SOCKSRC

       # ping from a different source address again
       atf_check -s exit:0 -o ignore \
           rump.ping -n -w 1 -c 1 -I $IP4SRC2 $IP4DST
       atf_check -s exit:0 -o match:'shmif0' rump.arp -n $IP4DST
       # ARP reply goes back via shmif1
       atf_check -s exit:0 -o match:'shmif1' rump.arp -n $IP4DST

       # Clean up by arp -d <ip>
       atf_check -s exit:0 -o ignore rump.arp -d $IP4DST
       # Both entries should be deleted
       atf_check -s not-exit:0 -e match:'no entry' rump.arp -n $IP4DST

       rump_server_destroy_ifaces
}

test_cache_creation_common()
{
       local no_dad=$1

       rump_server_start $SOCKSRC
       rump_server_start $SOCKDST

       if $no_dad; then
               export RUMP_SERVER=$SOCKSRC
               atf_check -s exit:0 -o match:'3 -> 0' \
                   rump.sysctl -w net.inet.ip.dad_count=0
               export RUMP_SERVER=$SOCKDST
               atf_check -s exit:0 -o match:'3 -> 0' \
                   rump.sysctl -w net.inet.ip.dad_count=0
       fi

       setup_dst_server
       setup_src_server

       macaddr_src=$(get_macaddr $SOCKSRC shmif0)
       macaddr_dst=$(get_macaddr $SOCKDST shmif0)

       # ARP cache entries are not created for DAD/GARP packets.
       export RUMP_SERVER=$SOCKSRC
       atf_check -s exit:0 -o empty rump.arp -n -a
       export RUMP_SERVER=$SOCKDST
       atf_check -s exit:0 -o empty rump.arp -n -a

       export RUMP_SERVER=$SOCKSRC

       extract_new_packets bus1 > ./out

       atf_check -s exit:0 -o ignore rump.ping -n -w $TIMEOUT -c 1 $IP4DST
       $DEBUG && rump.arp -n -a

       extract_new_packets bus1 > ./out

       atf_check -s exit:0 -o match:"\? \(10.0.1.2\) at $macaddr_dst on shmif0 [0-9]+s R" \
           rump.arp -n -a

       export RUMP_SERVER=$SOCKDST

       # An entry was first created as stale then sending an ARP reply made it delay.
       atf_check -s exit:0 -o match:"\? \(10.0.1.1\) at $macaddr_src on shmif0 [0-9]+s D" \
           rump.arp -n -a

       # The sender resolves the receiver's address.
       pkt=$(make_pkt_str_arpreq 10.0.1.2 10.0.1.1)
       atf_check -s exit:0 -o match:"$pkt" cat ./out

       # The receiver doesn't resolv the sender's address because the ARP request
       # from the sender has let make an entry already.
       pkt=$(make_pkt_str_arpreq 10.0.1.1 10.0.1.2)
       atf_check -s exit:0 -o not-match:"$pkt" cat ./out

       rump_server_destroy_ifaces
}

test_cache_creation()
{

       test_cache_creation_common false
}

test_cache_creation_nodad()
{

       test_cache_creation_common true
}

add_test()
{
       local name=$1
       local desc="$2"

       atf_test_case "arp_${name}" cleanup
       eval "arp_${name}_head() {
                       atf_set descr \"${desc}\"
                       atf_set require.progs rump_server
               }
           arp_${name}_body() {
                       test_${name}
               }
           arp_${name}_cleanup() {
                       \$DEBUG && dump
                       cleanup
               }"
       atf_add_test_case "arp_${name}"
}

atf_init_test_cases()
{

       add_test cache_expiration      "Tests for ARP cache expiration"
       add_test command               "Tests for arp_commands of arp(8)"
       add_test garp                  "Tests for GARP"
       add_test garp_without_dad      "Tests for GARP with DAD disabled"
       add_test cache_overwriting     "Tests for behavior of overwriting ARP caches"
       add_test proxy_arp_pub         "Tests for Proxy ARP (pub)"
       add_test proxy_arp_pubproxy    "Tests for Proxy ARP (pub proxy)"
       add_test link_activation       "Tests for activating a new MAC address"
       add_test static                "Tests for static ARP entries"
       add_test rtm                   "Tests for routing messages on operations of ARP entries"
       add_test purge_on_route_change "Tests if ARP entries are removed on route change"
       add_test purge_on_route_delete "Tests if ARP entries are removed on route delete"
       add_test purge_on_ifdown       "Tests if ARP entries are removed on interface down"
       add_test stray_entries         "Tests if ARP entries are removed on route change"
       add_test cache_creation        "Tests for ARP cache creation"
       add_test cache_creation_nodad  "Tests for ARP cache creation without DAD"
}

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