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import unittest

from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, ICMP

from framework import VppTestCase
from asfframework import (
    tag_run_solo,
    tag_fixme_debian11,
    is_distro_debian11,
    VppTestRunner,
)
from remote_test import RemoteClass, RemoteVppTestCase
from vpp_memif import remove_all_memif_vpp_config, VppSocketFilename, VppMemif
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_papi import VppEnum


@tag_run_solo
@tag_fixme_debian11
class TestMemif(VppTestCase):
    """Memif Test Case"""

    remote_class = RemoteVppTestCase

    @classmethod
    def get_cpus_required(cls):
        return super().get_cpus_required() + cls.remote_class.get_cpus_required()

    @classmethod
    def assign_cpus(cls, cpus):
        remote_cpus = cpus[: cls.remote_class.get_cpus_required()]
        my_cpus = cpus[cls.remote_class.get_cpus_required() :]
        cls.remote_class.assign_cpus(remote_cpus)
        super().assign_cpus(my_cpus)

    @classmethod
    def setUpClass(cls):
        # fork new process before client connects to VPP
        cls.remote_test = RemoteClass(cls.remote_class)
        cls.remote_test.start_remote()
        cls.remote_test.set_request_timeout(10)
        super(TestMemif, cls).setUpClass()
        if is_distro_debian11 == True and not hasattr(cls, "vpp"):
            cls.remote_test.quit_remote()
            return
        cls.remote_test.setUpClass(cls.tempdir)
        cls.create_pg_interfaces(range(1))
        for pg in cls.pg_interfaces:
            pg.config_ip4()
            pg.admin_up()
            pg.resolve_arp()

    @classmethod
    def tearDownClass(cls):
        cls.remote_test.tearDownClass()
        cls.remote_test.quit_remote()
        for pg in cls.pg_interfaces:
            pg.unconfig_ip4()
            pg.set_table_ip4(0)
            pg.admin_down()
        super(TestMemif, cls).tearDownClass()

    def tearDown(self):
        remove_all_memif_vpp_config(self)
        remove_all_memif_vpp_config(self.remote_test)
        super(TestMemif, self).tearDown()

    def _check_socket_filename(self, dump, socket_id, filename):
        for d in dump:
            if (d.socket_id == socket_id) and (d.socket_filename == filename):
                return True
        return False

    def test_memif_socket_filename_add_del(self):
        """Memif socket filename add/del"""

        # dump default socket filename
        dump = self.vapi.memif_socket_filename_dump()
        self.assertTrue(
            self._check_socket_filename(dump, 0, "%s/memif.sock" % self.tempdir)
        )

        memif_sockets = []
        # existing path
        memif_sockets.append(
            VppSocketFilename(self, 1, "%s/memif1.sock" % self.tempdir)
        )
        # default path (test tempdir)
        memif_sockets.append(
            VppSocketFilename(self, 2, "memif2.sock", add_default_folder=True)
        )
        # create new folder in default folder
        memif_sockets.append(
            VppSocketFilename(self, 3, "sock/memif3.sock", add_default_folder=True)
        )

        for sock in memif_sockets:
            sock.add_vpp_config()
            dump = sock.query_vpp_config()
            self.assertTrue(
                self._check_socket_filename(dump, sock.socket_id, sock.socket_filename)
            )

        for sock in memif_sockets:
            sock.remove_vpp_config()

        dump = self.vapi.memif_socket_filename_dump()
        self.assertTrue(
            self._check_socket_filename(dump, 0, "%s/memif.sock" % self.tempdir)
        )

    def _create_delete_test_one_interface(self, memif):
        memif.add_vpp_config()

        dump = memif.query_vpp_config()

        self.assertTrue(dump)
        self.assertEqual(dump.sw_if_index, memif.sw_if_index)
        self.assertEqual(dump.role, memif.role)
        self.assertEqual(dump.mode, memif.mode)
        if memif.socket_id is not None:
            self.assertEqual(dump.socket_id, memif.socket_id)

        memif.remove_vpp_config()

        dump = memif.query_vpp_config()

        self.assertFalse(dump)

    def _connect_test_one_interface(self, memif):
        self.assertTrue(memif.wait_for_link_up(5))
        dump = memif.query_vpp_config()

        if memif.role == VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE:
            self.assertEqual(dump.ring_size, memif.ring_size)
            self.assertEqual(dump.buffer_size, memif.buffer_size)
        else:
            self.assertEqual(dump.ring_size, 1)
            self.assertEqual(dump.buffer_size, 0)

    def _connect_test_interface_pair(self, memif0, memif1):
        memif0.add_vpp_config()
        memif1.add_vpp_config()

        memif0.admin_up()
        memif1.admin_up()

        self._connect_test_one_interface(memif0)
        self._connect_test_one_interface(memif1)

        memif0.remove_vpp_config()
        memif1.remove_vpp_config()

    def test_memif_create_delete(self):
        """Memif create/delete interface"""

        memif = VppMemif(
            self,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
        )
        self._create_delete_test_one_interface(memif)
        memif.role = VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_MASTER
        self._create_delete_test_one_interface(memif)

    def test_memif_create_custom_socket(self):
        """Memif create with non-default socket filename"""

        memif_sockets = []
        # existing path
        memif_sockets.append(
            VppSocketFilename(self, 1, "%s/memif1.sock" % self.tempdir)
        )
        # default path (test tempdir)
        memif_sockets.append(
            VppSocketFilename(self, 2, "memif2.sock", add_default_folder=True)
        )
        # create new folder in default folder
        memif_sockets.append(
            VppSocketFilename(self, 3, "sock/memif3.sock", add_default_folder=True)
        )

        memif = VppMemif(
            self,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
        )

        for sock in memif_sockets:
            sock.add_vpp_config()
            memif.socket_id = sock.socket_id
            memif.role = VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE
            self._create_delete_test_one_interface(memif)
            memif.role = VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_MASTER
            self._create_delete_test_one_interface(memif)

    def test_memif_connect(self):
        """Memif connect"""
        memif = VppMemif(
            self,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
            ring_size=1024,
            buffer_size=2048,
            secret="abc",
        )

        remote_socket = VppSocketFilename(
            self.remote_test, 1, "%s/memif.sock" % self.tempdir
        )
        remote_socket.add_vpp_config()

        remote_memif = VppMemif(
            self.remote_test,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_MASTER,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
            socket_id=1,
            ring_size=1024,
            buffer_size=2048,
            secret="abc",
        )

        self._connect_test_interface_pair(memif, remote_memif)

        memif.role = VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_MASTER
        remote_memif.role = VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE

        self._connect_test_interface_pair(memif, remote_memif)

    def _create_icmp(self, pg, memif, num):
        pkts = []
        for i in range(num):
            pkt = (
                Ether(dst=pg.local_mac, src=pg.remote_mac)
                / IP(src=pg.remote_ip4, dst=str(memif.ip_prefix.network_address))
                / ICMP(id=memif.if_id, type="echo-request", seq=i)
            )
            pkts.append(pkt)
        return pkts

    def _verify_icmp(self, pg, memif, rx, seq):
        ip = rx[IP]
        self.assertEqual(ip.src, str(memif.ip_prefix.network_address))
        self.assertEqual(ip.dst, pg.remote_ip4)
        self.assertEqual(ip.proto, 1)
        icmp = rx[ICMP]
        self.assertEqual(icmp.type, 0)  # echo-reply
        self.assertEqual(icmp.id, memif.if_id)
        self.assertEqual(icmp.seq, seq)

    def test_memif_ping(self):
        """Memif ping"""

        memif = VppMemif(
            self,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
        )

        remote_socket = VppSocketFilename(
            self.remote_test, 1, "%s/memif.sock" % self.tempdir
        )
        remote_socket.add_vpp_config()

        remote_memif = VppMemif(
            self.remote_test,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_MASTER,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
            socket_id=1,
        )

        memif.add_vpp_config()
        memif.config_ip4()
        memif.admin_up()

        remote_memif.add_vpp_config()
        remote_memif.config_ip4()
        remote_memif.admin_up()

        self.assertTrue(memif.wait_for_link_up(5))
        self.assertTrue(remote_memif.wait_for_link_up(5))

        # add routing to remote vpp
        route = VppIpRoute(
            self.remote_test,
            self.pg0._local_ip4_subnet,
            24,
            [VppRoutePath(memif.ip_prefix.network_address, 0xFFFFFFFF)],
            register=False,
        )

        route.add_vpp_config()

        # create ICMP echo-request from local pg to remote memif
        packet_num = 10
        pkts = self._create_icmp(self.pg0, remote_memif, packet_num)

        self.pg0.add_stream(pkts)
        self.pg_enable_capture(self.pg_interfaces)
        self.pg_start()
        capture = self.pg0.get_capture(packet_num, timeout=2)
        seq = 0
        for c in capture:
            self._verify_icmp(self.pg0, remote_memif, c, seq)
            seq += 1

        route.remove_vpp_config()

    def test_memif_admin_up_down_up(self):
        """Memif admin up/down/up"""
        memif = VppMemif(
            self,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_SLAVE,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
            ring_size=1024,
            buffer_size=2048,
            secret="abc",
        )

        remote_socket = VppSocketFilename(
            self.remote_test, 1, "%s/memif.sock" % self.tempdir
        )
        remote_socket.add_vpp_config()

        remote_memif = VppMemif(
            self.remote_test,
            VppEnum.vl_api_memif_role_t.MEMIF_ROLE_API_MASTER,
            VppEnum.vl_api_memif_mode_t.MEMIF_MODE_API_ETHERNET,
            socket_id=1,
            ring_size=1024,
            buffer_size=2048,
            secret="abc",
        )

        memif.add_vpp_config()
        remote_memif.add_vpp_config()

        memif.admin_up()
        remote_memif.admin_up()
        memif.admin_down()
        remote_memif.admin_down()
        memif.admin_up()
        remote_memif.admin_up()

        self._connect_test_one_interface(memif)
        self._connect_test_one_interface(remote_memif)

        memif.remove_vpp_config()
        remote_memif.remove_vpp_config()
        remote_socket.remove_vpp_config()


if __name__ == "__main__":
    unittest.main(testRunner=VppTestRunner)