tests: Use wlantest without capture file write buffering

This makes the run_tshark() operations more reliable while still
allowing to reduce the extra wait by forcing wlantest to flush the
packets to the pcapng file.

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/start.sh

@@ -103,7 +103,7 @@ fi
 test -f /proc/modules && sudo modprobe mac80211_hwsim radios=7 channels=$NUM_CH support_p2p_device=0
 
 sudo ifconfig hwsim0 up
-sudo $WLANTEST -i hwsim0 -n $LOGDIR/hwsim0.pcapng -c -dt -L $LOGDIR/hwsim0 &
+sudo $WLANTEST -i hwsim0 -n $LOGDIR/hwsim0.pcapng -c -dtN -L $LOGDIR/hwsim0 &
 for i in 0 1 2; do
     DBUSARG=""
     if [ $i = "0" -a -r /var/run/dbus/pid -a -r /var/run/dbus/hwsim-test ]; then

tests/hwsim/tshark.py

@@ -21,7 +21,7 @@ def run_tshark(filename, filter, display=None, wait=True):
     if wait:
         # wait a bit to make it more likely for wlantest sniffer to have
         # captured and written the results into a file that we can process here
-        time.sleep(1)
+        time.sleep(0.1)
 
     try:
         arg = [ "tshark", "-r", filename,