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from abc import abstractmethod, ABCMeta
import socket
from util import Host
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 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:%04x::%04x" % (self.sw_if_index, i)
host = Host(mac, ip4, ip6)
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_ip6 = "fd01:%04x::1" % self.sw_if_index
self._local_ip6n = socket.inet_pton(socket.AF_INET6, self.local_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)))
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)
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,
24, 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."""
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."""
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)
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,
64, is_ipv6=1, is_add=0)
except AttributeError:
self.has_ip6_config = False
self.has_ip6_config = False
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.test.vapi.sw_interface_set_table(
self.sw_if_index, 0, 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.test.vapi.sw_interface_set_table(
self.sw_if_index, 1, 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 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
def enable_mpls(self):
"""Enable MPLS on the VPP interface."""
self.test.vapi.sw_interface_enable_disable_mpls(
self.sw_if_index)
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