from autotest_lib.server import autotest, hosts, subcommand, test
from autotest_lib.server import utils

class netpipe(test.test):
    version = 2

    def run_once(self, pair, buffer, upper_bound, variance):
        print("running on %s and %s\n" % (pair[0], pair[1]))

        # Designate a platform label for the server side of tests.
        server_label = 'net_server'

        server = hosts.create_host(pair[0])
        client = hosts.create_host(pair[1])

        # If client has the server_label, then swap server and client.
        platform_label = client.get_platform_label()
        if platform_label == server_label:
            (server, client) = (client, server)

        # Disable IP Filters if they are enabled.
        for m in [client, server]:
            status = m.run('iptables -L')
            if not status.exit_status:
                m.disable_ipfilters()

        # Starting a test indents the status.log entries. This test starts 2
        # additional tests causing their log entries to be indented twice. This
        # double indent confuses the parser, so reset the indent level on the
        # job, let the forked tests record their entries, then restore the
        # previous indent level.
        self.job._indenter.decrement()

        server_at = autotest.Autotest(server)
        client_at = autotest.Autotest(client)

        template = ''.join(["job.run_test('netpipe', server_ip='%s', ",
                            "client_ip='%s', role='%s', bidirectional=True, ",
                            "buffer_size=%d, upper_bound=%d,"
                            "perturbation_size=%d, tag='%s')"])

        server_control_file = template % (server.ip, client.ip, 'server',
                                          buffer, upper_bound, variance,
                                          'server')
        client_control_file = template % (server.ip, client.ip, 'client',
                                          buffer, upper_bound, variance,
                                          'client')

        server_command = subcommand.subcommand(server_at.run,
                                    [server_control_file, server.hostname],
                                    subdir='../')
        client_command = subcommand.subcommand(client_at.run,
                                    [client_control_file, client.hostname],
                                    subdir='../')

        subcommand.parallel([server_command, client_command])

        # The parser needs a keyval file to know what host ran the test.
        utils.write_keyval('../' + server.hostname,
                           {"hostname": server.hostname})
        utils.write_keyval('../' + client.hostname,
                           {"hostname": client.hostname})

        # Restore indent level of main job.
        self.job._indenter.increment()

        for m in [client, server]:
            status = m.run('iptables -L')
            if not status.exit_status:
                m.enable_ipfilters()