from abc import abstractmethod, ABCMeta import socket from util import Host, mk_ll_addr from vpp_neighbor import VppNeighbor 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_hosts[0].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 socket.inet_pton(socket.AF_INET, self._local_ip4) @property def remote_ip4(self): """IPv4 address of remote peer "connected" to this interface.""" return self._remote_hosts[0].ip4 @property def remote_ip4n(self): """IPv4 address of remote peer - raw, suitable as API parameter.""" return socket.inet_pton(socket.AF_INET, self.remote_ip4) @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 socket.inet_pton(socket.AF_INET6, self.local_ip6) @property def local_ip6_ll(self): """Local IPv6 linnk-local address on VPP interface (string).""" return self._local_ip6_ll @property def local_ip6n_ll(self): """Local IPv6 link-local address - raw, suitable as API parameter.""" return self.local_ip6n_ll @property def remote_ip6(self): """IPv6 address of remote peer "connected" to this interface.""" return self._remote_hosts[0].ip6 @property def remote_ip6n(self): """IPv6 address of remote peer - raw, suitable as API parameter""" return socket.inet_pton(socket.AF_INET6, self.remote_ip6) @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 @abstractmethod def __init__(self, test): self._test = test self._remote_hosts = [] self._hosts_by_mac = {} self._hosts_by_ip4 = {} self._hosts_by_ip6 = {} self.generate_remote_hosts() self._local_ip4 = "172.16.%u.1" % self.sw_if_index self._local_ip4n = socket.inet_pton(socket.AF_INET, self.local_ip4) self.local_ip4_prefix_len = 24 self.has_ip4_config = False self.ip4_table_id = 0 self._local_ip6 = "fd01:%x::1" % self.sw_if_index self._local_ip6n = socket.inet_pton(socket.AF_INET6, self.local_ip6) self.local_ip6_prefix_len = 64 self.has_ip6_config = False self.ip6_table_id = 0 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))) self._local_ip6_ll = mk_ll_addr(self.local_mac) self._local_ip6n_ll = socket.inet_pton(socket.AF_INET6, self.local_ip6_ll) def config_ip4(self): """Configure IPv4 address on the VPP interface.""" self.test.vapi.sw_interface_add_del_address( self.sw_if_index, self.local_ip4n, self.local_ip4_prefix_len) self.has_ip4_config = True 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( self.sw_if_index, self.local_ip4n, self.local_ip4_prefix_len, is_add=0) except AttributeError: self.has_ip4_config = False self.has_ip4_config = False 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: macn = host.mac.replace(":", "").decode('hex') ipn = host.ip4n self.test.vapi.ip_neighbor_add_del( self.sw_if_index, macn, ipn) def config_ip6(self): """Configure IPv6 address on the VPP interface.""" self.test.vapi.sw_interface_add_del_address( self.sw_if_index, self._local_ip6n, self.local_ip6_prefix_len, is_ipv6=1) self.has_ip6_config = True 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( self.sw_if_index, self.local_ip6n, self.local_ip6_prefix_len, is_ipv6=1, is_add=0) except AttributeError: self.has_ip6_config = False self.has_ip6_config = False 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: macn = host.mac.replace(":", "").decode('hex') ipn = host.ip6n self.test.vapi.ip_neighbor_add_del( self.sw_if_index, macn, ipn, is_ipv6=1) def unconfig(self): """Unconfigure IPv6 and IPv4 address on the VPP interface.""" self.unconfig_ip4() self.unconfig_ip6() 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) 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) 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 ip6_ra_config(self, no=0, suppress=0, send_unicast=0): """Configure IPv6 RA suppress on the VPP interface.""" self.test.vapi.ip6_sw_interface_ra_config(self.sw_if_index, no, suppress, send_unicast) def ip6_ra_prefix(self, address, address_length, is_no=0, off_link=0, no_autoconfig=0, use_default=0): """Configure IPv6 RA suppress on the VPP interface.""" self.test.vapi.ip6_sw_interface_ra_prefix(self.sw_if_index, address, address_length, is_no=is_no, off_link=off_link, no_autoconfig=no_autoconfig, use_default=use_default) def admin_up(self): """Put interface ADMIN-UP.""" self.test.vapi.sw_interface_set_flags(self.sw_if_index, admin_up_down=1) def admin_down(self): """Put interface ADMIN-down.""" self.test.vapi.sw_interface_set_flags(self.sw_if_index, admin_up_down=0) def ip6_enable(self): """IPv6 Enable interface""" self.test.vapi.ip6_sw_interface_enable_disable(self.sw_if_index, enable=1) def ip6_disable(self): """Put interface ADMIN-DOWN.""" self.test.vapi.ip6_sw_interface_enable_disable(self.sw_if_index, enable=0) 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 def enable_mpls(self): """Enable MPLS on the VPP interface.""" self.test.vapi.sw_interface_enable_disable_mpls( self.sw_if_index) def disable_mpls(self): """Enable MPLS on the VPP interface.""" self.test.vapi.sw_interface_enable_disable_mpls( self.sw_if_index, 0) def is_ip4_entry_in_fib_dump(self, dump): for i in dump: if i.address == self.local_ip4n and \ i.address_length == self.local_ip4_prefix_len and \ i.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( self.sw_if_index, ip_sw_if_index) 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( self.sw_if_index, ip_sw_if_index, is_add=0) 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)