* [Buildroot] [PATCH 1/1] support/testing: add pppd runtime test
@ 2024-10-21 19:20 Julien Olivain
2024-10-22 19:31 ` Thomas Petazzoni via buildroot
0 siblings, 1 reply; 2+ messages in thread
From: Julien Olivain @ 2024-10-21 19:20 UTC (permalink / raw)
To: buildroot; +Cc: Julien Olivain
Signed-off-by: Julien Olivain <ju.o@free.fr>
---
Patch tested in:
https://gitlab.com/jolivain/buildroot/-/jobs/8145740231
---
DEVELOPERS | 2 +
support/testing/tests/package/test_pppd.py | 125 ++++++++++++++++++
.../package/test_pppd/linux-ppp.fragment | 2 +
3 files changed, 129 insertions(+)
create mode 100644 support/testing/tests/package/test_pppd.py
create mode 100644 support/testing/tests/package/test_pppd/linux-ppp.fragment
diff --git a/DEVELOPERS b/DEVELOPERS
index 2d9bcc2c87..c649d3d6f2 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -1968,6 +1968,8 @@ F: support/testing/tests/package/test_pciutils.py
F: support/testing/tests/package/test_perftest.py
F: support/testing/tests/package/test_pigz.py
F: support/testing/tests/package/test_postgresql.py
+F: support/testing/tests/package/test_pppd.py
+F: support/testing/tests/package/test_pppd/
F: support/testing/tests/package/test_pv.py
F: support/testing/tests/package/test_python_distro.py
F: support/testing/tests/package/test_python_gnupg.py
diff --git a/support/testing/tests/package/test_pppd.py b/support/testing/tests/package/test_pppd.py
new file mode 100644
index 0000000000..015f10f02d
--- /dev/null
+++ b/support/testing/tests/package/test_pppd.py
@@ -0,0 +1,125 @@
+import os
+import time
+
+import infra.basetest
+
+
+class TestPppd(infra.basetest.BRTest):
+ # This test needs a Kernel with ppp support.
+ kern_frag = \
+ infra.filepath("tests/package/test_pppd/linux-ppp.fragment")
+ # Our test config also enables socat and iproute2 used as
+ # supporting tools for this test.
+ config = \
+ f"""
+ BR2_aarch64=y
+ BR2_TOOLCHAIN_EXTERNAL=y
+ BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+ BR2_LINUX_KERNEL=y
+ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+ BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.57"
+ 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_IPROUTE2=y
+ BR2_PACKAGE_PPPD=y
+ BR2_PACKAGE_SOCAT=y
+ BR2_TARGET_ROOTFS_CPIO=y
+ BR2_TARGET_ROOTFS_CPIO_GZIP=y
+ # BR2_TARGET_ROOTFS_TAR is not set
+ """
+
+ def test_run(self):
+ img = os.path.join(self.builddir, "images", "rootfs.cpio.gz")
+ kern = os.path.join(self.builddir, "images", "Image")
+ self.emulator.boot(arch="aarch64",
+ kernel=kern,
+ kernel_cmdline=["console=ttyAMA0"],
+ options=["-M", "virt", "-cpu", "cortex-a57", "-m", "256M", "-initrd", img])
+ self.emulator.login()
+
+ # We define our socat output log file.
+ socat_log = "/tmp/socat.log"
+
+ # We define two PTY names we will use for this test.
+ pty0 = "/dev/ttyppp0"
+ pty1 = "/dev/ttyppp1"
+
+ # We define two IP addresses.
+ local_ip = "192.168.12.34"
+ remote_ip = "10.20.30.40"
+
+ # We define few parameters for our ping.
+ ping_count = 3
+ ping_size = 32
+ ping_payload = "aa"
+
+ # We check the program can execute.
+ self.assertRunOk("pppd --version")
+
+ # We create two PTYs connected to each other with socat. We
+ # will connect a pppd on each one to create connection end
+ # points. We also enable some debugging to print the content
+ # of packets forwarded by socat. We will use that to later
+ # validate data actually passed through this channel. Note: we
+ # start the command in a subshell to suppress the job control
+ # message, when this background process will be killed later
+ # in this test.
+ cmd = "( socat -d2 -x -lu"
+ cmd += f" PTY,link={pty0},rawer,b115200 PTY,link={pty1},rawer,b115200"
+ cmd += f" > {socat_log} 2>&1 & )"
+ self.assertRunOk(cmd)
+
+ # We create a network namespace. We will use it to isolate one
+ # of the two pppd instances (our fake remote). We do so to
+ # make sure our network test will not use the default routes
+ # (or local loopback). This will make sure our communication
+ # data will go through our PPP link.
+ namespace = "remote-ppp"
+ self.assertRunOk(f"ip netns add {namespace}")
+
+ # We start our (fake) remote pppd instance, in our netns.
+ cmd = f"ip netns exec {namespace} "
+ cmd += f"pppd noauth ifname ppp1 {pty1} {remote_ip}:{local_ip}"
+ self.assertRunOk(cmd)
+
+ # We wait a bit for the pppd to settle...
+ time.sleep(3)
+
+ # We start out local pppd instance, this time in the default
+ # network namespace.
+ cmd = f"pppd noauth ifname ppp0 {pty0} {local_ip}:{remote_ip}"
+ self.assertRunOk(cmd)
+
+ # We wait again...
+ time.sleep(3)
+
+ # We check we can ping our two IPs. The local IP is expected
+ # to go through the interface loopback (and not go through our
+ # PPP link). Only the remote IP ping is expected to go through
+ # our socat PTYs.
+ for ip in local_ip, remote_ip:
+ cmd = f"ping -c {ping_count} -s {ping_size} -p {ping_payload} {ip}"
+ self.assertRunOk(cmd)
+
+ # We stop our pppd and socat processes.
+ self.assertRunOk("killall pppd")
+ self.assertRunOk("killall socat")
+
+ # For debugging this test, it can be useful to print the socat
+ # log on the console. Uncomment this line, if needed.
+ # self.assertRunOk(f"cat {socat_log}")
+
+ # The actual ping payload set with our payload_data is
+ # slightly smaller as the ping packet size, due other data
+ # written by the ping command. This is why we subtract 4 bytes
+ # to the size.
+ pattern = " ".join([ping_payload] * (ping_size - 4))
+ # We count the number of packets with this payload transmitted
+ # through socat...
+ out, ret = self.emulator.run(f"grep -Fc '{pattern}' {socat_log}")
+ self.assertEqual(ret, 0)
+ # We check we have exactly twice our requested ping count (one
+ # for ICMP ECHO, one for the REPLY).
+ self.assertEqual(int(out[0]), ping_count * 2)
diff --git a/support/testing/tests/package/test_pppd/linux-ppp.fragment b/support/testing/tests/package/test_pppd/linux-ppp.fragment
new file mode 100644
index 0000000000..18bedc2831
--- /dev/null
+++ b/support/testing/tests/package/test_pppd/linux-ppp.fragment
@@ -0,0 +1,2 @@
+CONFIG_PPP=y
+CONFIG_PPP_ASYNC=y
--
2.47.0
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2024-10-21 19:20 [Buildroot] [PATCH 1/1] support/testing: add pppd runtime test Julien Olivain
2024-10-22 19:31 ` Thomas Petazzoni via buildroot
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