1import os
2import time
3
4import infra.basetest
5
6
7class TestSoCat(infra.basetest.BRTest):
8    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
9        """
10        BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
11        BR2_PACKAGE_NETCAT=y
12        BR2_PACKAGE_SOCAT=y
13        BR2_TARGET_ROOTFS_CPIO=y
14        # BR2_TARGET_ROOTFS_TAR is not set
15        """
16
17    def test_run(self):
18        cpio_file = os.path.join(self.builddir, "images", "rootfs.cpio")
19        self.emulator.boot(arch="armv5",
20                           kernel="builtin",
21                           options=["-initrd", cpio_file])
22        self.emulator.login()
23
24        # Some values, for the test.
25        msg = "Hello Buildroot!"
26        out_file = "output.txt"
27        port1 = 11111
28        port2 = 22222
29
30        # Check the program can execute.
31        self.assertRunOk("socat -V")
32
33        # We start the receiver netcat on tcp/port2.
34        cmd = f"nc -n -l -p {port2} > {out_file} 2> /dev/null &"
35        self.assertRunOk(cmd)
36
37        time.sleep(2 * self.timeout_multiplier)
38
39        # We start socat in background to listen on tcp/port1 and
40        # forward to tcp/port2.
41        cmd = f"socat TCP4-LISTEN:{port1} TCP4:127.0.0.1:{port2} &"
42        self.assertRunOk(cmd)
43
44        time.sleep(2 * self.timeout_multiplier)
45
46        # We write a message on tcp/port1. Socat is expected to
47        # forward the message to the receiver on tcp/port2, and write
48        # our message in a file.
49        cmd = f"echo '{msg}' | nc -n -c 127.0.0.1 {port1}"
50        self.assertRunOk(cmd)
51
52        # We check the output file contains our message.
53        cmd = f"cat {out_file}"
54        out, ret = self.emulator.run(cmd)
55        self.assertEqual(ret, 0)
56        self.assertEqual(out[0], msg)
57