From c299a4b6a16b04e3a9d231690672199569eeb51e Mon Sep 17 00:00:00 2001
From: Jed Reynolds <jed@candelatech.com>
Date: Mon, 4 May 2020 14:32:28 -0700
Subject: [PATCH] arp-flood: much improved, causes a healthy arp storm

---
 arp-flood.sh | 109 ++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 81 insertions(+), 28 deletions(-)

diff --git a/arp-flood.sh b/arp-flood.sh
index 1b17d576..d0f01320 100755
--- a/arp-flood.sh
+++ b/arp-flood.sh
@@ -8,9 +8,11 @@ mgr=localhost
 port=4001
 station=wlan0
 upstream=eth1
-num_mvlans=20
+num_mvlans=200
 cxlist=()
 ports=($station)
+saved_gc_stale_time=`cat /proc/sys/net/ipv4/neigh/default/gc_stale_time`
+saved_base_reachable_time_ms=`cat /proc/sys/net/ipv4/neigh/default/base_reachable_time_ms`
 trap do_sigint ABRT
 trap do_sigint INT
 trap do_sigint KILL
@@ -20,66 +22,117 @@ trap do_sigint SEGV
 trap do_sigint TERM
 
 function do_sigint() {
-    echo ""
-    for cx in "${cxlist[@]}"; do
-        echo -n "stopping $cx "
-        fire_cmd set_cx_state default_tm $cx STOPPED >/dev/null
+    echo -en "\nDefaulting arp timings "
+    for ((i=0; i < num_mvlans; i++)); do
+        mvlan="${upstream}#${i}"
+        echo $saved_gc_stale_time > /proc/sys/net/ipv4/neigh/$mvlan/gc_stale_time
+        echo $saved_base_reachable_time_ms > /proc/sys/net/ipv4/neigh/$mvlan/base_reachable_time_ms
+        echo -n "."
     done
+    echo ""
+    echo -en "\nStopping connections: "
+    fire_cmd stop_group udp-arp
+    #for cx in "${cxlist[@]}"; do
+    #    echo -n ":"
+    #    fire_cmd set_cx_state default_tm $cx STOPPED >/dev/null
+    #done
+    echo ""
+    fire_cmd clear_group udp-arp
+    echo -n "Removing connections: "
     for cx in "${cxlist[@]}"; do
-        echo -n "removing $cx "
+        echo -n "x"
         fire_cmd rm_cx default_tm $cx STOPPED >/dev/null
     done
+    echo ""
+    echo -n "Removing endpoints:   "
     for cx in "${cxlist[@]}"; do
-        echo -n "removing $cx-A $cx-B "
+        echo -n "-"
         fire_cmd rm_endp ${cx}-A STOPPED >/dev/null
         fire_cmd rm_endp ${cx}-B STOPPED >/dev/null
     done
+    echo ""
+    set +x
     exit 0
 }
 
 function fire_cmd() {
-    ./lf_firemod.pl --mgr $mgr --mgr_port $port --quiet yes --action do_cmd \
-    --cmd "$*" \
-     &>/dev/null
+    ./lf_firemod.pl --mgr $mgr --mgr_port $port --quiet yes \
+         --action do_cmd --cmd "$*" &>/dev/null
 }
 function fire_newcx() {
     local cxname=$1; shift
     local sta=$1; shift
     local eth=$1; shift
     ./lf_firemod.pl --mgr $mgr --mgr_port $port --action create_cx --quiet yes \
-        --cx_name $cxname --use_ports $sta,$eth --use_speeds 2600,2600 --endp_type udp \
-         &>/dev/null
+        --cx_name $cxname --use_ports $sta,$eth --use_speeds 11500,11500 --endp_type udp \
+        &>/dev/null
 }
 
 # create new set of vlans, this will also recreate them using random mac addresses
-for i in `seq 0 $num_mvlans`; do
+
+#num_vlans=$(( $num_mvlans - 1))
+set -e
+if (( num_mvlans < 1 )); then
+    echo "Too few vlans"
+    exit 1
+fi
+
+echo -n "Removing old $num_mvlans macvlans: "
+for ((i=0; i < num_mvlans; i++)); do
     mvlan="${upstream}#${i}"
-    echo -n " $mvlan"
     fire_cmd rm_vlan 1 1 $mvlan
     echo -n "-"
+    sleep 0.03
+done
+sleep 1
+echo " Checking for $num_mvlans old vlans:"
+while (./lf_portmod.pl --mgr localhost --list_port_names | grep -q "$upstream#"); do
+    sleep 1
+    echo -n ","
+done
+
+echo -n "Adding $num_mvlans new macvlans:   "
+for ((i=0; i < num_mvlans; i++)); do
     fire_cmd add_mvlan 1 1 $upstream 'xx:xx:xx:*:*:xx' $i
-    echo -n "+"
-    fire_cmd set_port 1 1 "$mvlan" NA NA NA NA 2147483648 NA NA NA NA 67125250
-    echo -n "."
+    echo -n ":"
+    sleep 0.05
+done
+# "84033538"
+for ((i=0; i < num_mvlans; i++)); do
+    mvlan="${upstream}#${i}"
+    fire_cmd set_port 1 1 "$mvlan" NA NA NA NA 2147483648 NA NA NA NA 75513858
+    echo -n "="
+    sleep 0.05
+    echo 1 > /proc/sys/net/ipv4/neigh/$mvlan/gc_stale_time
+    echo 1 > /proc/sys/net/ipv4/neigh/$mvlan/base_reachable_time
+done
+echo ""
+fire_cmd add_group udp-arp
+sleep 2
+echo -n "Creating $num_mvlans connections:  "
+for ((i=0; i < num_mvlans; i++)); do
+    mvlan="${upstream}#${i}"
     fire_newcx "udp-$i" $station $mvlan
-    echo -n "o"
+    echo -n "+"
     cxlist+=("udp-$i")
     ports+=($mvlan)
-done
-sleep 4
-for i in `seq 0 $num_mvlans`; do
-    echo -n "!"
-    fire_cmd set_cx_state default_tm "udp-$i" RUNNING
+    fire_cmd add_tgcx udp-arp "udp-$i"
 done
 
-sleep 4
+sleep 2
+#for ((i=0; i < num_mvlans; i++)); do
+    #echo -n "="
+    #fire_cmd set_cx_state default_tm "udp-$i" RUNNING
+#done
+fire_cmd start_group udp-arp
+sleep 2
 echo ""
-echo -n "Starting arp flushing "
+echo -n "Starting arp flushing: "
 while : ; do
     for p in "${ports[@]}"; do
-        ip neigh flush dev $p@$upstream
-
+         ip neigh flush dev $p
     done
-    echo -n "."
+    echo -n "!"
     sleep 0.2
 done
+#