test_drv_mcast_ttl

#!/bin/bash
source `dirname $0`/common.sh

COUNT=2             # send this many frames
TTL=11              # with this ttl
CH=6
CAP_FILE=out.cap
MCAST_ADDR=224.4.5.6
PAYLOAD="01234567890123456789"

PHY=`if2phy $IFACE`

# join mesh
start_mesh dev0
if_up dev0

# start capturing on MON_IFACE
set_monitor $MON_IFACE
set_channel $MON_IFACE $CH
start_capture_filter_mac $MON_IFACE $CAP_FILE $IFACE &
sleep 2
cap_pid=$!

# set mcast ttl
OLD_TTL=`sudo cat /sys/kernel/debug/ieee80211/$PHY/netdev:$IFACE/mesh_config/mcast_ttl`
echo $TTL | sudo tee /sys/kernel/debug/ieee80211/$PHY/netdev:$IFACE/mesh_config/mcast_ttl

# send frames...
./drv_tx.py mcast $IFACE $COUNT $MCAST_ADDR:7890 $PAYLOAD

sleep 1
stop_all_captures

echo $OLD_TTL | sudo tee /sys/kernel/debug/ieee80211/$PHY/netdev:$IFACE/mesh_config/mcast_ttl

# inspect capture for any frame from us
IFACE_ADDR=`if2mac $IFACE`
FOUND=`tshark -r$CAP_FILE -Y"wlan.addr == $IFACE_ADDR" | wc -l`
[ "$FOUND" -lt 1 ] && fail "couldn't find frames from $IFACE_ADDR"

# now check ttl
FOUND=`tshark -r$CAP_FILE -Y"wlan.addr == $IFACE_ADDR && ip.dst == $MCAST_ADDR && data.data == \"$PAYLOAD\" && wlan_mgt.fixed.mesh_ttl == $TTL" | wc -l`
[ "$FOUND" -lt 1 ] && fail "No frames with mesh ttl $TTL found"

# make sure all mcast have that ttl
FOUND=`tshark -r$CAP_FILE -Y"wlan.addr == $IFACE_ADDR && ip.dst == $MCAST_ADDR && data.data == \"$PAYLOAD\" && wlan_mgt.fixed.mesh_ttl != $TTL" | wc -l`
[ "$FOUND" -gt 0 ] && fail "Frames with invalid mesh ttl found"
cleanup