[Buildroot] [PATCH 1/1] support/testing: wpa_supplicant: new runtime test

Signed-off-by: Julien Olivain <[email protected]>
---
Patch tested in:
https://gitlab.com/jolivain/buildroot/-/jobs/15968993900
---
 DEVELOPERS                                    |   2 +
 .../tests/package/test_wpa_supplicant.py      | 121 ++++++++++++++++++
 .../linux-mac80211-hwsim.fragment             |   3 +
 .../rootfs-overlay/etc/hostapd.conf           |  14 ++
 .../rootfs-overlay/etc/wpa_supplicant.conf    |  13 ++
 5 files changed, 153 insertions(+)
 create mode 100644 support/testing/tests/package/test_wpa_supplicant.py
 create mode 100644 support/testing/tests/package/test_wpa_supplicant/linux-mac80211-hwsim.fragment
 create mode 100644 support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/hostapd.conf
 create mode 100644 support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/wpa_supplicant.conf

diff --git a/DEVELOPERS b/DEVELOPERS
index 98c9ee55d3..91b5d3cf89 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -2061,6 +2061,8 @@ F:	support/testing/tests/package/test_weston/
 F:	support/testing/tests/package/test_wget.py
 F:	support/testing/tests/package/test_which.py
 F:	support/testing/tests/package/test_wine.py
+F:	support/testing/tests/package/test_wpa_supplicant.py
+F:	support/testing/tests/package/test_wpa_supplicant/
 F:	support/testing/tests/package/test_xfsprogs.py
 F:	support/testing/tests/package/test_xfsprogs/
 F:	support/testing/tests/package/test_xvisor.py
diff --git a/support/testing/tests/package/test_wpa_supplicant.py b/support/testing/tests/package/test_wpa_supplicant.py
new file mode 100644
index 0000000000..ba6cef3fef
--- /dev/null
+++ b/support/testing/tests/package/test_wpa_supplicant.py
@@ -0,0 +1,121 @@
+import os
+import time
+
+import infra.basetest
+
+
+class TestWPASupplicant(infra.basetest.BRTest):
+    test_dir = "tests/package/test_wpa_supplicant"
+    # This test uses the mac80211_hwsim kernel test driver. See:
+    # https://docs.kernel.org/networking/mac80211_hwsim/mac80211_hwsim.html
+    kern_frag = \
+        infra.filepath(f"{test_dir}/linux-mac80211-hwsim.fragment")
+    rootfs_overlay = \
+        infra.filepath(f"{test_dir}/rootfs-overlay")
+    config = \
+        f"""
+        BR2_aarch64=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_LINUX_KERNEL=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.18.44"
+        BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+        BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
+        BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{kern_frag}"
+        BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+        BR2_PACKAGE_HOSTAPD=y
+        BR2_PACKAGE_IPROUTE2=y
+        BR2_PACKAGE_IW=y
+        BR2_PACKAGE_WPA_SUPPLICANT=y
+        BR2_PACKAGE_WPA_SUPPLICANT_CLI=y
+        BR2_ROOTFS_OVERLAY="{rootfs_overlay}"
+        BR2_TARGET_ROOTFS_EXT2=y
+        BR2_TARGET_ROOTFS_EXT2_4=y
+        BR2_TARGET_ROOTFS_EXT2_SIZE="256M"
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+        disk = os.path.join(self.builddir, "images", "rootfs.ext4")
+        kern = os.path.join(self.builddir, "images", "Image")
+        bootargs = ["root=/dev/vda"]
+        qemu_opts = ["-M", "virt", "-cpu", "cortex-a57", "-m", "512M",
+                     "-drive", f"file={disk},if=virtio,format=raw"]
+        self.emulator.boot(arch="aarch64",
+                           kernel=kern,
+                           kernel_cmdline=bootargs,
+                           options=qemu_opts)
+        self.emulator.login()
+
+        # We check the program can run.
+        self.assertRunOk("wpa_supplicant -v")
+
+        # We define a network namespace to isolate our
+        # access point components.
+        ns = "ap-ns"
+
+        # We create the network namespace.
+        self.assertRunOk(f"ip netns add {ns}")
+
+        # We isolate our wireless network device in our namespace.
+        self.assertRunOk(f"iw phy phy0 set netns name {ns}")
+
+        # We define the command prefix to execute commands inside
+        # our network namespace.
+        ns_exec = f"ip netns exec {ns}"
+
+        # We start the hostapd daemon.
+        cmd = [
+            ns_exec,
+            "hostapd",
+            "-B",
+            "-f /var/log/hostapd.log",
+            "/etc/hostapd.conf"
+        ]
+        self.assertRunOk(" ".join(cmd))
+
+        # We wait for the wlan0 interface to come up.
+        for attempt in range(10):
+            time.sleep(3)
+
+            cmd = ns_exec
+            cmd += " cat /sys/class/net/wlan0/operstate"
+            out, ret = self.emulator.run(cmd)
+            self.assertEqual(ret, 0)
+            if out[0] == "up":
+                break
+        else:
+            self.fail("Timeout while waiting for wlan0 to be up.")
+
+        # We start the wpa_supplicant client process.
+        cmd = [
+            "wpa_supplicant",
+            "-B",
+            "-f /var/log/wpa_supplicant.log",
+            "-i wlan1",
+            "-c /etc/wpa_supplicant.conf"
+        ]
+        self.assertRunOk(" ".join(cmd))
+
+        # We wait for the wlan1 interface to come up.
+        for attempt in range(10):
+            time.sleep(3)
+
+            cmd = "cat /sys/class/net/wlan1/operstate"
+            out, ret = self.emulator.run(cmd)
+            self.assertEqual(ret, 0)
+            if out[0] == "up":
+                break
+        else:
+            self.fail("Timeout while waiting for wlan1 to be up.")
+
+        # We set an IP address on the wlan0 hostapd side.
+        cmd = ns_exec
+        cmd += " ip addr add dev wlan0 192.168.1.111/24"
+        self.assertRunOk(cmd)
+
+        # We set an IP address on the wlan1 wpa_supplicant side.
+        self.assertRunOk("ip addr add dev wlan1 192.168.1.222/24")
+
+        # We check we can ping the hostapd wlan0 IP address.
+        self.assertRunOk("ping -c 3 -i 0.2 -W 2 192.168.1.111")
diff --git a/support/testing/tests/package/test_wpa_supplicant/linux-mac80211-hwsim.fragment b/support/testing/tests/package/test_wpa_supplicant/linux-mac80211-hwsim.fragment
new file mode 100644
index 0000000000..30aee1e9a0
--- /dev/null
+++ b/support/testing/tests/package/test_wpa_supplicant/linux-mac80211-hwsim.fragment
@@ -0,0 +1,3 @@
+CONFIG_CFG80211=y
+CONFIG_MAC80211=y
+CONFIG_MAC80211_HWSIM=y
diff --git a/support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/hostapd.conf b/support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/hostapd.conf
new file mode 100644
index 0000000000..b7c3c1a446
--- /dev/null
+++ b/support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/hostapd.conf
@@ -0,0 +1,14 @@
+# Config example taken from kernel
+# Documentation/networking/mac80211_hwsim/hostapd.conf
+
+interface=wlan0
+driver=nl80211
+
+hw_mode=g
+channel=1
+ssid=mac80211 test
+
+wpa=2
+wpa_key_mgmt=WPA-PSK
+wpa_pairwise=CCMP
+wpa_passphrase=12345678
diff --git a/support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/wpa_supplicant.conf b/support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/wpa_supplicant.conf
new file mode 100644
index 0000000000..3914a03046
--- /dev/null
+++ b/support/testing/tests/package/test_wpa_supplicant/rootfs-overlay/etc/wpa_supplicant.conf
@@ -0,0 +1,13 @@
+# Config example taken from kernel
+# Documentation/networking/mac80211_hwsim/wpa_supplicant.conf
+
+ctrl_interface=/var/run/wpa_supplicant
+
+network={
+	ssid="mac80211 test"
+	psk="12345678"
+	key_mgmt=WPA-PSK
+	proto=WPA2
+	pairwise=CCMP
+	group=CCMP
+}
-- 
2.55.0

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