refactor test framework

Change-Id: I31da3b1857b6399f9899276a2d99cdd19436296c
Signed-off-by: Klement Sekera <ksekera@cisco.com>
Signed-off-by: Matej Klotton <mklotton@cisco.com>
Signed-off-by: Jan Gelety <jgelety@cisco.com>
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>

1 files changed, 240 insertions, 0 deletions

diff --git a/test/vpp_interface.py b/test/vpp_interface.py
new file mode 100644
index 00000000..c596ab5a
--- /dev/null
+++ b/test/vpp_interface.py
@@ -0,0 +1,240 @@
+from abc import abstractmethod, ABCMeta
+import socket
+from logging import info, error
+from scapy.layers.l2 import Ether, ARP
+
+from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6ND_NA, ICMPv6NDOptSrcLLAddr, ICMPv6NDOptDstLLAddr
+
+
+class VppInterface(object):
+    """
+    Generic VPP interface
+    """
+    __metaclass__ = ABCMeta
+
+    @property
+    def sw_if_index(self):
+        """Interface index assigned by VPP"""
+        return self._sw_if_index
+
+    @property
+    def remote_mac(self):
+        """MAC-address of the remote interface "connected" to this interface"""
+        return self._remote_mac
+
+    @property
+    def local_mac(self):
+        """MAC-address of the VPP interface"""
+        return self._local_mac
+
+    @property
+    def local_ip4(self):
+        """Local IPv4 address on VPP interface (string)"""
+        return self._local_ip4
+
+    @property
+    def local_ip4n(self):
+        """Local IPv4 address - raw, suitable as API parameter"""
+        return self._local_ip4n
+
+    @property
+    def remote_ip4(self):
+        """IPv4 address of remote peer "connected" to this interface"""
+        return self._remote_ip4
+
+    @property
+    def remote_ip4n(self):
+        """IPv4 address of remote peer - raw, suitable as API parameter"""
+        return self._remote_ip4n
+
+    @property
+    def local_ip6(self):
+        """Local IPv6 address on VPP interface (string)"""
+        return self._local_ip6
+
+    @property
+    def local_ip6n(self):
+        """Local IPv6 address - raw, suitable as API parameter"""
+        return self._local_ip6n
+
+    @property
+    def remote_ip6(self):
+        """IPv6 address of remote peer "connected" to this interface"""
+        return self._remote_ip6
+
+    @property
+    def remote_ip6n(self):
+        """IPv6 address of remote peer - raw, suitable as API parameter"""
+        return self._remote_ip6n
+
+    @property
+    def name(self):
+        """Name of the interface"""
+        return self._name
+
+    @property
+    def dump(self):
+        """Raw result of sw_interface_dump for this interface"""
+        return self._dump
+
+    @property
+    def test(self):
+        """Test case creating this interface"""
+        return self._test
+
+    def post_init_setup(self):
+        """Additional setup run after creating an interface object"""
+        self._remote_mac = "02:00:00:00:ff:%02x" % self.sw_if_index
+
+        self._local_ip4 = "172.16.%u.1" % self.sw_if_index
+        self._local_ip4n = socket.inet_pton(socket.AF_INET, self.local_ip4)
+        self._remote_ip4 = "172.16.%u.2" % self.sw_if_index
+        self._remote_ip4n = socket.inet_pton(socket.AF_INET, self.remote_ip4)
+
+        self._local_ip6 = "fd01:%u::1" % self.sw_if_index
+        self._local_ip6n = socket.inet_pton(socket.AF_INET6, self.local_ip6)
+        self._remote_ip6 = "fd01:%u::2" % self.sw_if_index
+        self._remote_ip6n = socket.inet_pton(socket.AF_INET6, self.remote_ip6)
+
+        r = self.test.vapi.sw_interface_dump()
+        for intf in r:
+            if intf.sw_if_index == self.sw_if_index:
+                self._name = intf.interface_name.split(b'\0', 1)[0]
+                self._local_mac = ':'.join(intf.l2_address.encode('hex')[i:i + 2]
+                                           for i in range(0, 12, 2))
+                self._dump = intf
+                break
+        else:
+            raise Exception(
+                "Could not find interface with sw_if_index %d "
+                "in interface dump %s" %
+                (self.sw_if_index, repr(r)))
+
+    @abstractmethod
+    def __init__(self, test, index):
+        self._test = test
+        self.post_init_setup()
+        info("New %s, MAC=%s, remote_ip4=%s, local_ip4=%s" %
+             (self.__name__, self.remote_mac, self.remote_ip4, self.local_ip4))
+
+    def config_ip4(self):
+        """Configure IPv4 address on the VPP interface"""
+        addr = self.local_ip4n
+        addr_len = 24
+        self.test.vapi.sw_interface_add_del_address(
+            self.sw_if_index, addr, addr_len)
+
+    def config_ip6(self):
+        """Configure IPv6 address on the VPP interface"""
+        addr = self._local_ip6n
+        addr_len = 64
+        self.test.vapi.sw_interface_add_del_address(
+            self.sw_if_index, addr, addr_len, is_ipv6=1)
+
+    def disable_ipv6_ra(self):
+        """Configure IPv6 RA suppress on the VPP interface"""
+        self.test.vapi.sw_interface_ra_suppress(self.sw_if_index)
+
+    def create_arp_req(self):
+        """Create ARP request applicable for this interface"""
+        return (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.remote_mac) /
+                ARP(op=ARP.who_has, pdst=self.local_ip4,
+                    psrc=self.remote_ip4, hwsrc=self.remote_mac))
+
+    def create_ndp_req(self):
+        return (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.remote_mac) /
+              IPv6(src=self.remote_ip6, dst=self.local_ip6) /
+              ICMPv6ND_NS(tgt=self.local_ip6) /
+              ICMPv6NDOptSrcLLAddr(lladdr=self.remote_mac))
+
+    def resolve_arp(self, pg_interface=None):
+        """Resolve ARP using provided packet-generator interface
+
+        :param pg_interface: interface used to resolve, if None then this
+            interface is used
+
+        """
+        if pg_interface is None:
+            pg_interface = self
+        info("Sending ARP request for %s on port %s" %
+             (self.local_ip4, pg_interface.name))
+        arp_req = self.create_arp_req()
+        pg_interface.add_stream(arp_req)
+        pg_interface.enable_capture()
+        self.test.pg_start()
+        info(self.test.vapi.cli("show trace"))
+        arp_reply = pg_interface.get_capture()
+        if arp_reply is None or len(arp_reply) == 0:
+            info("No ARP received on port %s" % pg_interface.name)
+            return
+        arp_reply = arp_reply[0]
+        # Make Dot1AD packet content recognizable to scapy
+        if arp_reply.type == 0x88a8:
+            arp_reply.type = 0x8100
+            arp_reply = Ether(str(arp_reply))
+        try:
+            if arp_reply[ARP].op == ARP.is_at:
+                info("VPP %s MAC address is %s " %
+                     (self.name, arp_reply[ARP].hwsrc))
+                self._local_mac = arp_reply[ARP].hwsrc
+            else:
+                info("No ARP received on port %s" % pg_interface.name)
+        except:
+            error("Unexpected response to ARP request:")
+            error(arp_reply.show())
+            raise
+
+    def resolve_ndp(self, pg_interface=None):
+        """Resolve NDP using provided packet-generator interface
+
+        :param pg_interface: interface used to resolve, if None then this
+            interface is used
+
+        """
+        if pg_interface is None:
+            pg_interface = self
+        info("Sending NDP request for %s on port %s" %
+             (self.local_ip6, pg_interface.name))
+        ndp_req = self.create_ndp_req()
+        pg_interface.add_stream(ndp_req)
+        pg_interface.enable_capture()
+        self.test.pg_start()
+        info(self.test.vapi.cli("show trace"))
+        ndp_reply = pg_interface.get_capture()
+        if ndp_reply is None or len(ndp_reply) == 0:
+            info("No NDP received on port %s" % pg_interface.name)
+            return
+        ndp_reply = ndp_reply[0]
+        # Make Dot1AD packet content recognizable to scapy
+        if ndp_reply.type == 0x88a8:
+            ndp_reply.type = 0x8100
+            ndp_reply = Ether(str(ndp_reply))
+        try:
+            ndp_na = ndp_reply[ICMPv6ND_NA]
+            opt = ndp_na[ICMPv6NDOptDstLLAddr]
+            info("VPP %s MAC address is %s " %
+                 (self.name, opt.lladdr))
+            self._local_mac = opt.lladdr
+        except:
+            error("Unexpected response to NDP request:")
+            error(ndp_reply.show())
+            raise
+
+    def admin_up(self):
+        """ Put interface ADMIN-UP """
+        self.test.vapi.sw_interface_set_flags(self.sw_if_index, admin_up_down=1)
+
+    def add_sub_if(self, sub_if):
+        """
+        Register a sub-interface with this interface
+
+        :param sub_if: sub-interface
+
+        """
+        if not hasattr(self, 'sub_if'):
+            self.sub_if = sub_if
+        else:
+            if isinstance(self.sub_if, list):
+                self.sub_if.append(sub_if)
+            else:
+                self.sub_if = sub_if