import binascii import socket import abc import six from six import moves from util import Host, mk_ll_addr from vpp_papi import mac_ntop, VppEnum from ipaddress import IPv4Network, IPv6Network try: text_type = unicode except NameError: text_type = str @six.add_metaclass(abc.ABCMeta) class VppInterface(object): """Generic VPP interface.""" @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_hosts[0].mac @property def local_mac(self): """MAC-address of the VPP interface.""" return str(self._local_mac) @property def local_addr(self): return self._local_addr @property def remote_addr(self): return self._remote_addr @property def local_ip4(self): """Local IPv4 address on VPP interface (string).""" return self._local_ip4 @local_ip4.setter def local_ip4(self, value): self._local_ip4 = value @property def local_ip4_prefix_len(self): """Local IPv4 prefix length """ return self._local_ip4_len @local_ip4_prefix_len.setter def local_ip4_prefix_len(self, value): self._local_ip4_len = value @property def local_ip4_prefix(self): """Local IPv4 prefix """ return ("%s/%d" % (self._local_ip4, self._local_ip4_len)) @property def remote_ip4(self): """IPv4 address of remote peer "connected" to this interface.""" return self._remote_hosts[0].ip4 @property def local_ip6(self): """Local IPv6 address on VPP interface (string).""" return self._local_ip6 @local_ip6.setter def local_ip6(self, value): self._local_ip6 = value @property def local_ip6_prefix_len(self): """Local IPv6 prefix length """ return self._local_ip6_len @local_ip6_prefix_len.setter def local_ip6_prefix_len(self, value): self._local_ip6_len = value @property def local_ip6_prefix(self): """Local IPv4 prefix """ return ("%s/%d" % (self._local_ip6, self._local_ip6_len)) @property def remote_ip6(self): """IPv6 address of remote peer "connected" to this interface.""" return self._remote_hosts[0].ip6 @property def local_ip6_ll(self): """Local IPv6 link-local address on VPP interface (string).""" return self._local_ip6_ll @property def remote_ip6_ll(self): """Link-local IPv6 address of remote peer "connected" to this interface.""" return self._remote_ip6_ll @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 @property def remote_hosts(self): """Remote hosts list""" return self._remote_hosts @remote_hosts.setter def remote_hosts(self, value): """ :param list value: List of remote hosts. """ self._remote_hosts = value self._hosts_by_mac = {} self._hosts_by_ip4 = {} self._hosts_by_ip6 = {} for host in self._remote_hosts: self._hosts_by_mac[host.mac] = host self._hosts_by_ip4[host.ip4] = host self._hosts_by_ip6[host.ip6] = host def host_by_mac(self, mac): """ :param mac: MAC address to find host by. :return: Host object assigned to interface. """ return self._hosts_by_mac[mac] def host_by_ip4(self, ip): """ :param ip: IPv4 address to find host by. :return: Host object assigned to interface. """ return self._hosts_by_ip4[ip] def host_by_ip6(self, ip): """ :param ip: IPv6 address to find host by. :return: Host object assigned to interface. """ return self._hosts_by_ip6[ip] def generate_remote_hosts(self, count=1): """Generate and add remote hosts for the interface. :param int count: Number of generated remote hosts. """ self._remote_hosts = [] self._hosts_by_mac = {} self._hosts_by_ip4 = {} self._hosts_by_ip6 = {} for i in range( 2, count + 2): # 0: network address, 1: local vpp address mac = "02:%02x:00:00:ff:%02x" % (self.sw_if_index, i) ip4 = "172.16.%u.%u" % (self.sw_if_index, i) ip6 = "fd01:%x::%x" % (self.sw_if_index, i) ip6_ll = mk_ll_addr(mac) host = Host(mac, ip4, ip6, ip6_ll) self._remote_hosts.append(host) self._hosts_by_mac[mac] = host self._hosts_by_ip4[ip4] = host self._hosts_by_ip6[ip6] = host @abc.abstractmethod def __init__(self, test): self._test = test self._remote_hosts = [] self._hosts_by_mac = {} self._hosts_by_ip4 = {} self._hosts_by_ip6 = {} def set_mac(self, mac): self._local_mac = str(mac) self._local_ip6_ll = mk_ll_addr(self._local_mac) self.test.vapi.sw_interface_set_mac_address( self.sw_if_index, mac.packed) return self def set_sw_if_index(self, sw_if_index): if sw_if_index > 255: raise RuntimeError("Don't support sw_if_index values " "greater than 255.") self._sw_if_index = sw_if_index self.generate_remote_hosts() self._local_ip4 = "172.16.%u.1" % self.sw_if_index self._local_ip4_len = 24 self._local_ip4_subnet = "172.16.%u.0" % self.sw_if_index self._local_ip4_bcast = "172.16.%u.255" % self.sw_if_index self.has_ip4_config = False self.ip4_table_id = 0 self._local_ip6 = "fd01:%x::1" % self.sw_if_index self._local_ip6_len = 64 self.has_ip6_config = False self.ip6_table_id = 0 self._local_addr = {socket.AF_INET: self.local_ip4, socket.AF_INET6: self.local_ip6} self._remote_addr = {socket.AF_INET: self.remote_ip4, socket.AF_INET6: self.remote_ip6} r = self.test.vapi.sw_interface_dump(sw_if_index=self.sw_if_index) for intf in r: if intf.sw_if_index == self.sw_if_index: self._name = intf.interface_name self._local_mac = intf.l2_address self._dump = intf break else: raise Exception( "Could not find interface with sw_if_index %d " "in interface dump %s" % (self.sw_if_index, moves.reprlib.repr(r))) self._local_ip6_ll = mk_ll_addr(self.local_mac) self._remote_ip6_ll = mk_ll_addr(self.remote_mac) def config_ip4(self): """Configure IPv4 address on the VPP interface.""" self.test.vapi.sw_interface_add_del_address( sw_if_index=self.sw_if_index, prefix=self.local_ip4_prefix) self.has_ip4_config = True return self def unconfig_ip4(self): """Remove IPv4 address on the VPP interface.""" try: if self.has_ip4_config: self.test.vapi.sw_interface_add_del_address( sw_if_index=self.sw_if_index, prefix=self.local_ip4_prefix, is_add=0) except AttributeError: self.has_ip4_config = False self.has_ip4_config = False return self def configure_ipv4_neighbors(self): """For every remote host assign neighbor's MAC to IPv4 addresses. :param vrf_id: The FIB table / VRF ID. (Default value = 0) """ for host in self._remote_hosts: self.test.vapi.ip_neighbor_add_del(self.sw_if_index, host.mac, host.ip4) return self def config_ip6(self): """Configure IPv6 address on the VPP interface.""" self.test.vapi.sw_interface_add_del_address( sw_if_index=self.sw_if_index, prefix=self.local_ip6_prefix) self.has_ip6_config = True return self def unconfig_ip6(self): """Remove IPv6 address on the VPP interface.""" try: if self.has_ip6_config: self.test.vapi.sw_interface_add_del_address( sw_if_index=self.sw_if_index, prefix=self.local_ip6_prefix, is_add=0) except AttributeError: self.has_ip6_config = False self.has_ip6_config = False return self def configure_ipv6_neighbors(self): """For every remote host assign neighbor's MAC to IPv6 addresses. :param vrf_id: The FIB table / VRF ID. (Default value = 0) """ for host in self._remote_hosts: self.test.vapi.ip_neighbor_add_del(self.sw_if_index, host.mac, host.ip6) def unconfig(self): """Unconfigure IPv6 and IPv4 address on the VPP interface.""" self.unconfig_ip4() self.unconfig_ip6() return self def set_table_ip4(self, table_id): """Set the interface in a IPv4 Table. .. note:: Must be called before configuring IP4 addresses. """ self.ip4_table_id = table_id self.test.vapi.sw_interface_set_table( self.sw_if_index, 0, self.ip4_table_id) return self def set_table_ip6(self, table_id): """Set the interface in a IPv6 Table. .. note:: Must be called before configuring IP6 addresses. """ self.ip6_table_id = table_id self.test.vapi.sw_interface_set_table( self.sw_if_index, 1, self.ip6_table_id) return self def disable_ipv6_ra(self): """Configure IPv6 RA suppress on the VPP interface.""" self.test.vapi.sw_interface_ip6nd_ra_config( sw_if_index=self.sw_if_index, suppress=1) return self def ip6_ra_config(self, no=0, suppress=0, send_unicast=0): """Configure IPv6 RA suppress on the VPP interface.""" self.test.vapi.sw_interface_ip6nd_ra_config( sw_if_index=self.sw_if_index, is_no=no, suppress=suppress, send_unicast=send_unicast) return self def ip6_ra_prefix(self, prefix, is_no=0, off_link=0, no_autoconfig=0, use_default=0): """Configure IPv6 RA suppress on the VPP interface. prefix can be a string in the format of '<address>/<length_in_bits>' or ipaddress.ipnetwork object (if strict.)""" self.test.vapi.sw_interface_ip6nd_ra_prefix( sw_if_index=self.sw_if_index, prefix=prefix, use_default=use_default, off_link=off_link, no_autoconfig=no_autoconfig, is_no=is_no) return self def admin_up(self): """Put interface ADMIN-UP.""" self.test.vapi.sw_interface_set_flags( self.sw_if_index, flags=VppEnum.vl_api_if_status_flags_t.IF_STATUS_API_FLAG_ADMIN_UP) return self def admin_down(self): """Put interface ADMIN-down.""" self.test.vapi.sw_interface_set_flags(self.sw_if_index, flags=0) return self def link_up(self): """Put interface link-state-UP.""" self.test.vapi.cli("test interface link-state %s up" % self.name) def link_down(self): """Put interface link-state-down.""" self.test.vapi.cli("test interface link-state %s down" % self.name) def ip6_enable(self): """IPv6 Enable interface""" self.test.vapi.sw_interface_ip6_enable_disable(self.sw_if_index, enable=1) return self def ip6_disable(self): """Put interface ADMIN-DOWN.""" self.test.vapi.sw_interface_ip6_enable_disable(self.sw_if_index, enable=0) return self 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 return self def enable_mpls(self): """Enable MPLS on the VPP interface.""" self.test.vapi.sw_interface_set_mpls_enable(self.sw_if_index) return self def disable_mpls(self): """Enable MPLS on the VPP interface.""" self.test.vapi.sw_interface_set_mpls_enable(self.sw_if_index, 0) return self def is_ip4_entry_in_fib_dump(self, dump): for i in dump: n = IPv4Network(text_type("%s/%d" % (self.local_ip4, self.local_ip4_prefix_len))) if i.route.prefix == n and \ i.route.table_id == self.ip4_table_id: return True return False def set_unnumbered(self, ip_sw_if_index): """ Set the interface to unnumbered via ip_sw_if_index """ self.test.vapi.sw_interface_set_unnumbered(ip_sw_if_index, self.sw_if_index) return self def unset_unnumbered(self, ip_sw_if_index): """ Unset the interface to unnumbered via ip_sw_if_index """ self.test.vapi.sw_interface_set_unnumbered(ip_sw_if_index, self.sw_if_index, is_add=0) return self def set_proxy_arp(self, enable=1): """ Set the interface to enable/disable Proxy ARP """ self.test.vapi.proxy_arp_intfc_enable_disable( self.sw_if_index, enable) return self def query_vpp_config(self): dump = self.test.vapi.sw_interface_dump(sw_if_index=self.sw_if_index) return self.is_interface_config_in_dump(dump) def get_interface_config_from_dump(self, dump): for i in dump: if i.interface_name.rstrip(' \t\r\n\0') == self.name and \ i.sw_if_index == self.sw_if_index: return i else: return None def is_interface_config_in_dump(self, dump): return self.get_interface_config_from_dump(dump) is not None def assert_interface_state(self, admin_up_down, link_up_down, expect_event=False): if expect_event: event = self.test.vapi.wait_for_event(timeout=1, name='sw_interface_event') self.test.assert_equal(event.sw_if_index, self.sw_if_index, "sw_if_index") self.test.assert_equal((event.flags & 1), admin_up_down, "admin state") self.test.assert_equal((event.flags & 2), link_up_down, "link state") dump = self.test.vapi.sw_interface_dump() if_state = self.get_interface_config_from_dump(dump) self.test.assert_equal((if_state.flags & 1), admin_up_down, "admin state") self.test.assert_equal((if_state.flags & 2), link_up_down, "link state") def __str__(self): return self.name def get_rx_stats(self): c = self.test.statistics.get_counter("^/if/rx$") return c[0][self.sw_if_index] def get_tx_stats(self): c = self.test.statistics.get_counter("^/if/tx$") return c[0][self.sw_if_index] def set_l3_mtu(self, mtu): self.test.vapi.sw_interface_set_mtu(self.sw_if_index, [mtu, 0, 0, 0]) return self def set_ip4_mtu(self, mtu): self.test.vapi.sw_interface_set_mtu(self.sw_if_index, [0, mtu, 0, 0]) return self def set_ip6_mtu(self, mtu): self.test.vapi.sw_interface_set_mtu(self.sw_if_index, [0, 0, mtu, 0]) return self def set_mpls_mtu(self, mtu): self.test.vapi.sw_interface_set_mtu(self.sw_if_index, [0, 0, 0, mtu]) return self