wifi: Add config for setting up testing environment

README.wifi

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+
+Install these tools
+
+* iw
+* wpa_supplicant
+* hostapd
+
+32-bit versions of these packages
+* pkg-config libnl-3-dev libnl-genl-3-dev
+
+In Ubuntu
+
+   sudo apt install iw hostapd pkg-config:i386 libnl-3-dev:i386 libnl-genl-3-dev:i386
+   sudo systemctl disable hostapd
+
+Create wifi interface
+
+   cd net-tools
+   ./net-setup.sh -c zwifi.conf -i zwifi
+

hostapd-open.conf

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+# Generic settings
+ieee80211d=1
+wmm_enabled=1
+country_code=FI
+utf8_ssid=1
+
+# Open AP
+ssid=zephyr-open
+channel=1

hostapd-wpa2.conf

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+# Generic settings
+ieee80211n=1
+wmm_enabled=1
+country_code=FI
+utf8_ssid=1
+hw_mode=g
+
+# WPA2 AP
+ssid=zephyr-wpa2
+channel=6
+wpa=2
+wpa_key_mgmt=WPA-PSK
+rsn_pairwise=CCMP
+wpa_passphrase=password

zwifi-dnsmasq-open.conf

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+domain-needed
+dhcp-range=192.0.2.32,192.0.2.64,255.255.255.0,1h

zwifi-dnsmasq-wpa2.conf

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+domain-needed
+dhcp-range=198.51.100.32,198.51.100.64,255.255.255.0,1h

zwifi.conf

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+# Configuration file for setting IP addresses for a wifi network interface.
+
+INTERFACE="$1"
+INTERFACE_AP="${INTERFACE}"
+
+PID_FILE_WPA_SUPPLICANT=/var/run/zephyr-wpa_supplicant.pid
+LOG_FILE_WPA_SUPPLICANT=/var/log/zephyr-wpa_supplicant.log
+
+NUM_RADIOS=4
+
+HWADDR="00:00:5e:00:53:00"
+
+IPV6_ADDR_1="2001:db8::2"
+IPV6_ROUTE_1="2001:db8::/64"
+
+IPV4_ADDR_1="192.0.2.2/24"
+IPV4_ROUTE_1="192.0.2.0/24"
+
+# We do not want the default tun device as the hwsim will create one for us.
+# As the tun device is created by net-setup.sh automatically, delete it here.
+# Create it back in zwifi.conf.stop script in order to avoid error prints.
+ip tuntap del "$INTERFACE" mode tap
+
+modprobe mac80211_hwsim radios=${NUM_RADIOS}
+if [ $? -ne 0 ]; then
+   exit 1
+fi
+
+# Rename wlan0 and wlan1 to something Zephyr specific for easier debugging
+ip link set dev wlan0 down
+
+# wlan0 is for station
+ip link set dev wlan0 name "${INTERFACE}"
+ip link set dev "${INTERFACE}" up
+ip link set dev "${INTERFACE}" address ${HWADDR}
+
+# Create a namespace that hostapd is running at
+AP_NS=zwifi-ap
+
+ip netns add $AP_NS
+
+COUNT=0
+
+# Then setup different modes of access points
+for i in open wpa2
+do
+    IFACE="${INTERFACE_AP}-$i"
+    WLAN="wlan$(($COUNT + 1))"
+
+    ip link set dev "$WLAN" down
+    ip link set dev "$WLAN" name "${IFACE}"
+    ip link set dev "${IFACE}" up
+
+    #HWADDR_AP="00:00:5e:00:53:$(printf '%02x' $((256 - $NUM_RADIOS + $COUNT)))"
+    #ip link set dev "${IFACE}" address ${HWADDR_AP}
+
+    PHY_AP=$(iw dev "${IFACE}" info | grep wiphy | awk '{print "phy"$2}')
+    if [ -z "$PHY_AP" ]; then
+	echo "Invalid phy $PHY_AP"
+	exit 1
+    fi
+
+    # Bind phy to our namespace
+    iw phy "$PHY_AP" set netns name $AP_NS
+
+    PID_FILE_HOSTAPD="/var/run/zephyr-hostapd-${i}.pid"
+    LOG_FILE_HOSTAPD="/var/log/zephyr-hostapd-${i}.log"
+    CONF_FILE_HOSTAPD="hostapd-${i}.conf"
+
+    ip netns exec $AP_NS hostapd -B -f "$LOG_FILE_HOSTAPD" \
+       -P "$PID_FILE_HOSTAPD" -t -i "${IFACE}" "$CONF_FILE_HOSTAPD"
+
+    PID_FILE_DNSMASQ="/var/run/zephyr-dnsmasq-${i}.pid"
+    CONF_FILE_DNSMASQ="zwifi-dnsmasq-${i}.conf"
+    DNSMASQ_PORT=$((5353 + $COUNT))
+
+    ip netns exec $AP_NS dnsmasq -C "$CONF_FILE_DNSMASQ" \
+       -z -x "$PID_FILE_DNSMASQ" -i "${IFACE}"
+
+    COUNT=$((COUNT + 1))
+done
+
+#ip netns exec $AP_NS ip -6 address add $IPV6_ADDR_1 dev "${INTERFACE_AP}" nodad
+#ip netns exec $AP_NS ip -6 route add $IPV6_ROUTE_1 dev "${INTERFACE_AP}"
+#ip netns exec $AP_NS ip address add $IPV4_ADDR_1 dev "${INTERFACE_AP}"
+#ip netns exec $AP_NS ip route add $IPV4_ROUTE_1 dev "${INTERFACE_AP}" > /dev/null 2>&1
+
+# Now everything is ready so that Zephyr wpa_supplicant can connect to the
+# simulated wifi network.

zwifi.conf.stop

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+# Configuration file for setting IP addresses for a wifi network interface.
+
+INTERFACE="$1"
+
+# Rename wlan0 to something we want
+ip link set dev "$INTERFACE" down
+
+rmmod mac80211_hwsim
+
+for i in open wpa2
+do
+    PID_FILE_HOSTAPD=/var/run/zephyr-hostapd-${i}.pid
+    PID_FILE_DNSMASQ="/var/run/zephyr-dnsmasq-${i}.pid"
+
+    kill $(cat "$PID_FILE_HOSTAPD")
+    kill $(cat "$PID_FILE_DNSMASQ")
+done
+
+AP_NS=zwifi-ap
+ip netns delete $AP_NS
+
+# The net-tools script expects this so create it
+ip tuntap add "$INTERFACE" mode tap

zwifi.sh

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+./net-setup.sh -c zwifi.conf -i zwifi