linux-cp: Add tests for tun devices

Type: test

Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: Iec69d8624b15766ed65e7d09777819d2242dee17

src/vnet/ipsec/ipsec_api.c

@@ -696,9 +696,40 @@ vl_api_ipsec_itf_delete_t_handler (vl_api_ipsec_itf_delete_t * mp)
   REPLY_MACRO (VL_API_IPSEC_ITF_DELETE_REPLY);
 }
 
+static walk_rc_t
+send_ipsec_itf_details (ipsec_itf_t *itf, void *arg)
+{
+  ipsec_dump_walk_ctx_t *ctx = arg;
+  vl_api_ipsec_itf_details_t *mp;
+
+  mp = vl_msg_api_alloc (sizeof (*mp));
+  clib_memset (mp, 0, sizeof (*mp));
+  mp->_vl_msg_id = ntohs (VL_API_IPSEC_ITF_DETAILS);
+  mp->context = ctx->context;
+
+  mp->itf.mode = tunnel_mode_encode (itf->ii_mode);
+  mp->itf.user_instance = htonl (itf->ii_user_instance);
+  mp->itf.sw_if_index = htonl (itf->ii_sw_if_index);
+  vl_api_send_msg (ctx->reg, (u8 *) mp);
+
+  return (WALK_CONTINUE);
+}
+
 static void
 vl_api_ipsec_itf_dump_t_handler (vl_api_ipsec_itf_dump_t * mp)
 {
+  vl_api_registration_t *reg;
+
+  reg = vl_api_client_index_to_registration (mp->client_index);
+  if (!reg)
+    return;
+
+  ipsec_dump_walk_ctx_t ctx = {
+    .reg = reg,
+    .context = mp->context,
+  };
+
+  ipsec_itf_walk (send_ipsec_itf_details, &ctx);
 }
 
 typedef struct ipsec_sa_dump_match_ctx_t_

src/vnet/ipsec/ipsec_itf.c

@@ -342,6 +342,18 @@ ipsec_itf_delete (u32 sw_if_index)
   return 0;
 }
 
+void
+ipsec_itf_walk (ipsec_itf_walk_cb_t cb, void *ctx)
+{
+  ipsec_itf_t *itf;
+
+  pool_foreach (itf, ipsec_itf_pool)
+    {
+      if (WALK_CONTINUE != cb (itf, ctx))
+	break;
+    }
+}
+
 static clib_error_t *
 ipsec_itf_create_cli (vlib_main_t * vm,
 		      unformat_input_t * input, vlib_cli_command_t * cmd)

src/vnet/ipsec/ipsec_itf.h

@@ -110,6 +110,9 @@ extern u8 *format_ipsec_itf (u8 * s, va_list * a);
 
 extern ipsec_itf_t *ipsec_itf_get (index_t ii);
 
+typedef walk_rc_t (*ipsec_itf_walk_cb_t) (ipsec_itf_t *itf, void *ctx);
+extern void ipsec_itf_walk (ipsec_itf_walk_cb_t cd, void *ctx);
+
 /*
  * fd.io coding-style-patch-verification: ON
  *

test/test_linux_cp.py

@@ -6,8 +6,16 @@ from scapy.layers.inet import IP, UDP
 from scapy.layers.inet6 import IPv6, Raw
 from scapy.layers.l2 import Ether, ARP, Dot1Q
 
+from util import reassemble4
 from vpp_object import VppObject
 from framework import VppTestCase, VppTestRunner
+from vpp_ipip_tun_interface import VppIpIpTunInterface
+from template_ipsec import TemplateIpsec, IpsecTun4Tests, \
+    IpsecTun4, mk_scapy_crypt_key, config_tun_params
+from template_ipsec import TemplateIpsec, IpsecTun4Tests, \
+    IpsecTun4, mk_scapy_crypt_key, config_tun_params
+from test_ipsec_tun_if_esp import TemplateIpsecItf4
+from vpp_ipsec import VppIpsecSA, VppIpsecTunProtect, VppIpsecInterface
 
 
 class VppLcpPair(VppObject):
@@ -62,10 +70,13 @@ class TestLinuxCP(VppTestCase):
     def setUp(self):
         super(TestLinuxCP, self).setUp()
 
-        # create 4 pg interfaces so there are a few addresses
+        # create 4 pg interfaces so we can create two pairs
-        # in the FIB
         self.create_pg_interfaces(range(4))
 
+        # create on ip4 and one ip6 pg tun
+        self.pg_interfaces += self.create_pg_ip4_interfaces(range(4, 5))
+        self.pg_interfaces += self.create_pg_ip6_interfaces(range(5, 6))
+
         for i in self.pg_interfaces:
             i.admin_up()
 
@@ -169,6 +180,237 @@ class TestLinuxCP(VppTestCase):
         for phy in phys:
             phy.unconfig_ip4()
 
+    def test_linux_cp_tun(self):
+        """ Linux CP TUN """
+
+        #
+        # Setup
+        #
+        N_PKTS = 31
+
+        # create two pairs, wihch a bunch of hots on the phys
+        hosts = [self.pg4, self.pg5]
+        phy = self.pg2
+
+        phy.config_ip4()
+        phy.config_ip6()
+        phy.resolve_arp()
+        phy.resolve_ndp()
+
+        tun4 = VppIpIpTunInterface(
+            self,
+            phy,
+            phy.local_ip4,
+            phy.remote_ip4).add_vpp_config()
+        tun6 = VppIpIpTunInterface(
+            self,
+            phy,
+            phy.local_ip6,
+            phy.remote_ip6).add_vpp_config()
+        tuns = [tun4, tun6]
+
+        tun4.admin_up()
+        tun4.config_ip4()
+        tun6.admin_up()
+        tun6.config_ip6()
+
+        pair1 = VppLcpPair(self, tuns[0], hosts[0]).add_vpp_config()
+        pair2 = VppLcpPair(self, tuns[1], hosts[1]).add_vpp_config()
+
+        self.logger.info(self.vapi.cli("sh lcp adj verbose"))
+        self.logger.info(self.vapi.cli("sh lcp"))
+        self.logger.info(self.vapi.cli("sh ip punt redirect"))
+
+        #
+        # Traffic Tests
+        #
+
+        # host to phy for v4
+        p = (IP(src=tun4.local_ip4, dst="2.2.2.2") /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+
+        rxs = self.send_and_expect(self.pg4, p * N_PKTS, phy)
+
+        # verify inner packet is unchanged and has the tunnel encap
+        for rx in rxs:
+            self.assertEqual(rx[Ether].dst, phy.remote_mac)
+            self.assertEqual(rx[IP].dst, phy.remote_ip4)
+            self.assertEqual(rx[IP].src, phy.local_ip4)
+            inner = IP(rx[IP].payload)
+            self.assertEqual(inner.src, tun4.local_ip4)
+            self.assertEqual(inner.dst, "2.2.2.2")
+
+        # host to phy for v6
+        p = (IPv6(src=tun6.local_ip6, dst="2::2") /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+
+        rxs = self.send_and_expect(self.pg5, p * N_PKTS, phy)
+
+        # verify inner packet is unchanged and has the tunnel encap
+        for rx in rxs:
+            self.assertEqual(rx[IPv6].dst, phy.remote_ip6)
+            self.assertEqual(rx[IPv6].src, phy.local_ip6)
+            inner = IPv6(rx[IPv6].payload)
+            self.assertEqual(inner.src, tun6.local_ip6)
+            self.assertEqual(inner.dst, "2::2")
+
+        # phy to host v4
+        p = (Ether(dst=phy.local_mac, src=phy.remote_mac) /
+             IP(dst=phy.local_ip4, src=phy.remote_ip4) /
+             IP(dst=tun4.local_ip4, src=tun4.remote_ip4) /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+
+        rxs = self.send_and_expect(phy, p * N_PKTS, self.pg4)
+        for rx in rxs:
+            rx = IP(rx)
+            self.assertEqual(rx[IP].dst, tun4.local_ip4)
+            self.assertEqual(rx[IP].src, tun4.remote_ip4)
+
+        # phy to host v6
+        p = (Ether(dst=phy.local_mac, src=phy.remote_mac) /
+             IPv6(dst=phy.local_ip6, src=phy.remote_ip6) /
+             IPv6(dst=tun6.local_ip6, src=tun6.remote_ip6) /
+             UDP(sport=1234, dport=1234) /
+             Raw())
+
+        rxs = self.send_and_expect(phy, p * N_PKTS, self.pg5)
+        for rx in rxs:
+            rx = IPv6(rx)
+            self.assertEqual(rx[IPv6].dst, tun6.local_ip6)
+            self.assertEqual(rx[IPv6].src, tun6.remote_ip6)
+
+        # cleanup
+        phy.unconfig_ip4()
+        phy.unconfig_ip6()
+
+        tun4.unconfig_ip4()
+        tun6.unconfig_ip6()
+
+
+class TestLinuxCPIpsec(TemplateIpsec,
+                       TemplateIpsecItf4,
+                       IpsecTun4):
+    """ IPsec Interface IPv4 """
+
+    extra_vpp_plugin_config = ["plugin",
+                               "linux_cp_plugin.so",
+                               "{", "enable", "}",
+                               "plugin",
+                               "linux_cp_unittest_plugin.so",
+                               "{", "enable", "}"]
+
+    def setUp(self):
+        super(TestLinuxCPIpsec, self).setUp()
+
+        self.tun_if = self.pg0
+        self.pg_interfaces += self.create_pg_ip4_interfaces(range(3, 4))
+        self.pg_interfaces += self.create_pg_ip6_interfaces(range(4, 5))
+
+    def tearDown(self):
+        super(TestLinuxCPIpsec, self).tearDown()
+
+    def verify_encrypted(self, p, sa, rxs):
+        decrypt_pkts = []
+        for rx in rxs:
+            if p.nat_header:
+                self.assertEqual(rx[UDP].dport, 4500)
+            self.assert_packet_checksums_valid(rx)
+            self.assertEqual(len(rx) - len(Ether()), rx[IP].len)
+            try:
+                rx_ip = rx[IP]
+                decrypt_pkt = p.vpp_tun_sa.decrypt(rx_ip)
+                if not decrypt_pkt.haslayer(IP):
+                    decrypt_pkt = IP(decrypt_pkt[Raw].load)
+                if rx_ip.proto == socket.IPPROTO_ESP:
+                    self.verify_esp_padding(sa, rx_ip[ESP].data, decrypt_pkt)
+                decrypt_pkts.append(decrypt_pkt)
+                self.assert_equal(decrypt_pkt.src, p.tun_if.local_ip4)
+                self.assert_equal(decrypt_pkt.dst, p.tun_if.remote_ip4)
+            except:
+                self.logger.debug(ppp("Unexpected packet:", rx))
+                try:
+                    self.logger.debug(ppp("Decrypted packet:", decrypt_pkt))
+                except:
+                    pass
+                raise
+        pkts = reassemble4(decrypt_pkts)
+        for pkt in pkts:
+            self.assert_packet_checksums_valid(pkt)
+
+    def verify_decrypted(self, p, rxs):
+        for rx in rxs:
+            rx = IP(rx)
+            self.assert_equal(rx[IP].src, p.tun_if.remote_ip4)
+            self.assert_equal(rx[IP].dst, p.tun_if.local_ip4)
+            self.assert_packet_checksums_valid(rx)
+
+    def gen_encrypt_pkts(self, p, sa, sw_intf, src, dst, count=1,
+                         payload_size=54):
+        return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) /
+                sa.encrypt(IP(src=src, dst=dst) /
+                           UDP(sport=1111, dport=2222) /
+                           Raw(b'X' * payload_size))
+                for i in range(count)]
+
+    def test_linux_cp_ipsec4_tun(self):
+        """ Linux CP Ipsec TUN """
+
+        #
+        # Setup
+        #
+        N_PKTS = 31
+
+        # the pg that paris with the tunnel
+        self.host = self.pg3
+
+        # tunnel and protection setup
+        p = self.ipv4_params
+
+        self.config_network(p)
+        self.config_sa_tun(p,
+                           self.pg0.local_ip4,
+                           self.pg0.remote_ip4)
+        self.config_protect(p)
+
+        pair = VppLcpPair(self, p.tun_if, self.host).add_vpp_config()
+
+        self.logger.error(self.vapi.cli("sh int addr"))
+        self.logger.info(self.vapi.cli("sh lcp"))
+        self.logger.info(self.vapi.cli("sh ip punt redirect"))
+
+        #
+        # Traffic Tests
+        #
+
+        # host to phy for v4
+        pkt = (IP(src=p.tun_if.local_ip4,
+                  dst=p.tun_if.remote_ip4) /
+               UDP(sport=1234, dport=1234) /
+               Raw())
+
+        rxs = self.send_and_expect(self.host, pkt * N_PKTS, self.tun_if)
+        self.verify_encrypted(p, p.vpp_tun_sa, rxs)
+
+        # phy to host for v4
+        pkts = self.gen_encrypt_pkts(p, p.scapy_tun_sa, self.tun_if,
+                                     src=p.tun_if.remote_ip4,
+                                     dst=p.tun_if.local_ip4,
+                                     count=N_PKTS)
+        try:
+            rxs = self.send_and_expect(self.tun_if, pkts, self.host)
+            self.verify_decrypted(p, rxs)
+        finally:
+            self.logger.error(self.vapi.cli("sh trace"))
+
+        # cleanup
+        pair.remove_vpp_config()
+        self.unconfig_protect(p)
+        self.unconfig_sa(p)
+        self.unconfig_network(p)
+
 
 if __name__ == '__main__':
     unittest.main(testRunner=VppTestRunner)

test/vpp_ipip_tun_interface.py

@@ -34,6 +34,9 @@ class VppIpIpTunInterface(VppTunnelInterface):
                 'mode': self.mode,
             })
         self.set_sw_if_index(r.sw_if_index)
+        r = self.test.vapi.ipip_tunnel_dump(
+            sw_if_index=self.sw_if_index)
+        self.instance = r[0].tunnel.instance
         self.test.registry.register(self, self.test.logger)
         return self
 
@@ -51,7 +54,7 @@ class VppIpIpTunInterface(VppTunnelInterface):
         return self.object_id()
 
     def object_id(self):
-        return "ipip-%d" % self._sw_if_index
+        return "ipip%d" % self.instance
 
     @property
     def remote_ip(self):

test/vpp_ipsec.py

@@ -412,6 +412,8 @@ class VppIpsecInterface(VppInterface):
         })
         self.set_sw_if_index(r.sw_if_index)
         self.test.registry.register(self, self.test.logger)
+        ts = self.test.vapi.ipsec_itf_dump(sw_if_index=self._sw_if_index)
+        self.instance = ts[0].itf.user_instance
         return self
 
     def remove_vpp_config(self):
@@ -420,7 +422,7 @@ class VppIpsecInterface(VppInterface):
     def query_vpp_config(self):
         ts = self.test.vapi.ipsec_itf_dump(sw_if_index=0xffffffff)
         for t in ts:
-            if t.tunnel.sw_if_index == self._sw_if_index:
+            if t.itf.sw_if_index == self._sw_if_index:
                 return True
         return False
 
@@ -428,4 +430,4 @@ class VppIpsecInterface(VppInterface):
         return self.object_id()
 
     def object_id(self):
-        return "ipsec-%d" % self._sw_if_index
+        return "ipsec%d" % self.instance