#!/usr/bin/env python import unittest import socket import binascii import sys from framework import VppTestCase, VppTestRunner from scapy.packet import Raw from scapy.layers.l2 import Ether from scapy.layers.inet import IP, UDP, TCP from util import ppp class TestClassifier(VppTestCase): """ Classifier Test Case """ @classmethod def setUpClass(cls): """ Perform standard class setup (defined by class method setUpClass in class VppTestCase) before running the test case, set test case related variables and configure VPP. """ super(TestClassifier, cls).setUpClass() cls.acl_active_table = '' def setUp(self): """ Perform test setup before test case. **Config:** - create 4 pg interfaces - untagged pg0/pg1/pg2 interface pg0 -------> pg1 (IP ACL) \ ---> pg2 (MAC ACL)) \ -> pg3 (PBR) - setup interfaces: - put it into UP state - set IPv4 addresses - resolve neighbor address using ARP :ivar list interfaces: pg interfaces. :ivar list pg_if_packet_sizes: packet sizes in test. :ivar dict acl_tbl_idx: ACL table index. :ivar int pbr_vrfid: VRF id for PBR test. """ self.reset_packet_infos() super(TestClassifier, self).setUp() # create 4 pg interfaces self.create_pg_interfaces(range(4)) # packet sizes to test self.pg_if_packet_sizes = [64, 9018] self.interfaces = list(self.pg_interfaces) # ACL & PBR vars self.acl_tbl_idx = {} self.pbr_vrfid = 200 # setup all interfaces for intf in self.interfaces: intf.admin_up() intf.config_ip4() intf.resolve_arp() def tearDown(self): """Run standard test teardown and acl related log.""" if not self.vpp_dead: self.logger.info(self.vapi.ppcli("show inacl type ip4")) self.logger.info(self.vapi.ppcli("show outacl type ip4")) self.logger.info(self.vapi.cli("show classify table verbose")) self.logger.info(self.vapi.cli("show ip fib")) if self.acl_active_table == 'ip_out': self.output_acl_set_interface( self.pg0, self.acl_tbl_idx.get(self.acl_active_table), 0) self.acl_active_table = '' elif self.acl_active_table != '': self.input_acl_set_interface( self.pg0, self.acl_tbl_idx.get(self.acl_active_table), 0) self.acl_active_table = '' for intf in self.interfaces: intf.unconfig_ip4() intf.admin_down() super(TestClassifier, self).tearDown() def config_pbr_fib_entry(self, intf, is_add=1): """Configure fib entry to route traffic toward PBR VRF table :param VppInterface intf: destination interface to be routed for PBR. """ addr_len = 24 self.vapi.ip_add_del_route(intf.local_ip4n, addr_len, intf.remote_ip4n, table_id=self.pbr_vrfid, is_add=is_add) def create_stream(self, src_if, dst_if, packet_sizes, proto_l=UDP(sport=1234, dport=5678)): """Create input packet stream for defined interfaces. :param VppInterface src_if: Source Interface for packet stream. :param VppInterface dst_if: Destination Interface for packet stream. :param list packet_sizes: packet size to test. :param Scapy proto_l: Required IP protocol. Default protocol is UDP. """ pkts = [] for size in packet_sizes: info = self.create_packet_info(src_if, dst_if) payload = self.info_to_payload(info) p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) / proto_l / Raw(payload)) info.data = p.copy() self.extend_packet(p, size) pkts.append(p) return pkts def verify_capture(self, dst_if, capture, proto_l=UDP): """Verify captured input packet stream for defined interface. :param VppInterface dst_if: Interface to verify captured packet stream. :param list capture: Captured packet stream. :param Scapy proto_l: Required IP protocol. Default protocol is UDP. """ self.logger.info("Verifying capture on interface %s" % dst_if.name) last_info = dict() for i in self.interfaces: last_info[i.sw_if_index] = None dst_sw_if_index = dst_if.sw_if_index for packet in capture: try: ip_received = packet[IP] proto_received = packet[proto_l] payload_info = self.payload_to_info(str(packet[Raw])) packet_index = payload_info.index self.assertEqual(payload_info.dst, dst_sw_if_index) self.logger.debug( "Got packet on port %s: src=%u (id=%u)" % (dst_if.name, payload_info.src, packet_index)) next_info = self.get_next_packet_info_for_interface2( payload_info.src, dst_sw_if_index, last_info[payload_info.src]) last_info[payload_info.src] = next_info self.assertTrue(next_info is not None) self.assertEqual(packet_index, next_info.index) saved_packet = next_info.data ip_saved = saved_packet[IP] proto_saved = saved_packet[proto_l] # Check standard fields self.assertEqual(ip_received.src, ip_saved.src) self.assertEqual(ip_received.dst, ip_saved.dst) self.assertEqual(proto_received.sport, proto_saved.sport) self.assertEqual(proto_received.dport, proto_saved.dport) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise for i in self.interfaces: remaining_packet = self.get_next_packet_info_for_interface2( i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index]) self.assertTrue(remaining_packet is None, "Interface %s: Packet expected from interface %s " "didn't arrive" % (dst_if.name, i.name)) def verify_vrf(self, vrf_id): """ Check if the FIB table / VRF ID is configured. :param int vrf_id: The FIB table / VRF ID to be verified. :return: 1 if the FIB table / VRF ID is configured, otherwise return 0. """ ip_fib_dump = self.vapi.ip_fib_dump() vrf_count = 0 for ip_fib_details in ip_fib_dump: if ip_fib_details[2] == vrf_id: vrf_count += 1 if vrf_count == 0: self.logger.info("IPv4 VRF ID %d is not configured" % vrf_id) return 0 else: self.logger.info("IPv4 VRF ID %d is configured" % vrf_id) return 1 @staticmethod def build_ip_mask(proto='', src_ip='', dst_ip='', src_port='', dst_port=''): """Build IP ACL mask data with hexstring format. :param str proto: protocol number <0-ff> :param str src_ip: source ip address <0-ffffffff> :param str dst_ip: destination ip address <0-ffffffff> :param str src_port: source port number <0-ffff> :param str dst_port: destination port number <0-ffff> """ return ('{:0>20}{:0>12}{:0>8}{:0>4}{:0>4}'.format( proto, src_ip, dst_ip, src_port, dst_port)).rstrip('0') @staticmethod def build_ip_match(proto=0, src_ip='', dst_ip='', src_port=0, dst_port=0): """Build IP ACL match data with hexstring format. :param int proto: protocol number with valid option "x" :param str src_ip: source ip address with format of "x.x.x.x" :param str dst_ip: destination ip address with format of "x.x.x.x" :param int src_port: source port number "x" :param int dst_port: destination port number "x" """ if src_ip: src_ip = socket.inet_aton(src_ip).encode('hex') if dst_ip: dst_ip = socket.inet_aton(dst_ip).encode('hex') return ('{:0>20}{:0>12}{:0>8}{:0>4}{:0>4}'.format( hex(proto)[2:], src_ip, dst_ip, hex(src_port)[2:], hex(dst_port)[2:])).rstrip('0') @staticmethod def build_mac_mask(dst_mac='', src_mac='', ether_type=''): """Build MAC ACL mask data with hexstring format. :param str dst_mac: source MAC address <0-ffffffffffff> :param str src_mac: destination MAC address <0-ffffffffffff> :param str ether_type: ethernet type <0-ffff> """ return ('{:0>12}{:0>12}{:0>4}'.format(dst_mac, src_mac, ether_type)).rstrip('0') @staticmethod def build_mac_match(dst_mac='', src_mac='', ether_type=''): """Build MAC ACL match data with hexstring format. :param str dst_mac: source MAC address :param str src_mac: destination MAC address :param str ether_type: ethernet type <0-ffff> """ if dst_mac: dst_mac = dst_mac.replace(':', '') if src_mac: src_mac = src_mac.replace(':', '') return ('{:0>12}{:0>12}{:0>4}'.format(dst_mac, src_mac, ether_type)).rstrip('0') def create_classify_table(self, key, mask, data_offset=0): """Create Classify Table :param str key: key for classify table (ex, ACL name). :param str mask: mask value for interested traffic. :param int data_offset: """ r = self.vapi.classify_add_del_table( is_add=1, mask=binascii.unhexlify(mask), match_n_vectors=(len(mask) - 1) // 32 + 1, miss_next_index=0, current_data_flag=1, current_data_offset=data_offset) self.assertIsNotNone(r, msg='No response msg for add_del_table') self.acl_tbl_idx[key] = r.new_table_index def create_classify_session(self, table_index, match, pbr_option=0, vrfid=0, is_add=1): """Create Classify Session :param int table_index: table index to identify classify table. :param str match: matched value for interested traffic. :param int pbr_option: enable/disable PBR feature. :param int vrfid: VRF id. :param int is_add: option to configure classify session. - create(1) or delete(0) """ r = self.vapi.classify_add_del_session( is_add, table_index, binascii.unhexlify(match), opaque_index=0, action=pbr_option, metadata=vrfid) self.assertIsNotNone(r, msg='No response msg for add_del_session') def input_acl_set_interface(self, intf, table_index, is_add=1): """Configure Input ACL interface :param VppInterface intf: Interface to apply Input ACL feature. :param int table_index: table index to identify classify table. :param int is_add: option to configure classify session. - enable(1) or disable(0) """ r = self.vapi.input_acl_set_interface( is_add, intf.sw_if_index, ip4_table_index=table_index) self.assertIsNotNone(r, msg='No response msg for acl_set_interface') def output_acl_set_interface(self, intf, table_index, is_add=1): """Configure Output ACL interface :param VppInterface intf: Interface to apply Output ACL feature. :param int table_index: table index to identify classify table. :param int is_add: option to configure classify session. - enable(1) or disable(0) """ r = self.vapi.output_acl_set_interface( is_add, intf.sw_if_index, ip4_table_index=table_index) self.assertIsNotNone(r, msg='No response msg for acl_set_interface') # Tests split to different test case classes because of issue reported in # ticket VPP-1336 class TestClassifierIP(TestClassifier): """ Classifier IP Test Case """ def test_iacl_src_ip(self): """ Source IP iACL test Test scenario for basic IP ACL with source IP - Create IPv4 stream for pg0 -> pg1 interface. - Create iACL with source IP address. - Send and verify received packets on pg1 interface. """ # Basic iACL testing with source IP pkts = self.create_stream(self.pg0, self.pg1, self.pg_if_packet_sizes) self.pg0.add_stream(pkts) key = 'ip_src' self.create_classify_table(key, self.build_ip_mask(src_ip='ffffffff')) self.create_classify_session( self.acl_tbl_idx.get(key), self.build_ip_match(src_ip=self.pg0.remote_ip4)) self.input_acl_set_interface(self.pg0, self.acl_tbl_idx.get(key)) self.acl_active_table = key self.pg_enable_capture(self.pg_interfaces) self.pg_start() pkts = self.pg1.get_capture(len(pkts)) self.verify_capture(self.pg1, pkts) self.pg0.assert_nothing_captured(remark="packets forwarded") self.pg2.assert_nothing_captured(remark="packets forwarded") self.pg3.assert_nothing_captured(remark="packets forwarded") def test_iacl_dst_ip(self): """ Destination IP iACL test Test scenario for basic IP ACL with destination IP - Create IPv4 stream for pg0 -> pg1 interface. - Create iACL with destination IP address. - Send and verify received packets on pg1 interface. """ # Basic iACL testing with destination IP pkts = self.create_stream(self.pg0, self.pg1, self.pg_if_packet_sizes) self.pg0.add_stream(pkts) key = 'ip_dst' self.create_classify_table(key, self.build_ip_mask(dst_ip='ffffffff')) self.create_classify_session( self.acl_tbl_idx.get(key), self.build_ip_match(dst_ip=self.pg1.remote_ip4)) self.input_acl_set_interface(self.pg0, self.acl_tbl_idx.get(key)) self.acl_active_table = key self.pg_enable_capture(self.pg_interfaces) self.pg_start() pkts = self.pg1.get_capture(len(pkts)) self.verify_capture(self.pg1, pkts) self.pg0.assert_nothing_captured(remark="packets forwarded") self.pg2.assert_nothing_captured(remark="packets forwarded") self.pg3.assert_nothing_captured(remark="packets forwarded") def test_iacl_src_dst_ip(self): """ Source and destination IP iACL test Test scenario for basic IP ACL with source and destination IP - Create IPv4 stream for pg0 -> pg1 interface. - Create iACL with source and destination IP addresses. - Send and verify received packets on pg1 interface. """ # Basic iACL testing with source and destination IP pkts = self.create_stream(self.pg0, self.pg1, self.pg_if_packet_sizes) self.pg0.add_stream(pkts) key = 'ip' self.create_classify_table( key, self.build_ip_mask(src_ip='ffffffff', dst_ip='ffffffff')) self.create_classify_session( self.acl_tbl_idx.get(key), self.build_ip_match(src_ip=self.pg0.remote_ip4, dst_ip=self.pg1.remote_ip4)) self.input_acl_set_interface(self.pg0, self.acl_tbl_idx.get(key)) self.acl_active_table = key self.pg_enable_capture(self.pg_interfaces) self.pg_start() pkts = self.pg1.get_capture(len(pkts)) self.verify_capture(self.pg1, pkts) self.pg0.assert_nothing_captured(remark="packets forwarded") self.pg2.assert_nothing_captured(remark="packets forwarded") self.pg3.assert_nothing_captured(remark="packets forwarded") class TestClassifierUDP(TestClassifier): """ Classifier UDP proto Test Case """ def test_iacl_proto_udp(self): """ UDP protocol iACL test Test scenario for basic protocol ACL with UDP protocol - Create IPv4 stream for pg0 -> pg1 interface. 
/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 *------------------------------------------------------------------
 * ad.c - SRv6 Dynamic Proxy (AD) function
 *------------------------------------------------------------------
 */

#include <vnet/vnet.h>
#include <vnet/adj/adj.h>
#include <vnet/plugin/plugin.h>
#include <vpp/app/version.h>
#include <srv6-ad/ad.h>

unsigned char function_name[] = "SRv6-AD-plugin";
unsigned char keyword_str[] = "End.AD";
unsigned char def_str[] =
  "Endpoint with dynamic proxy to SR-unaware appliance";
unsigned char params_str[] = "nh <next-hop> oif <iface-out> iif <iface-in>";


/*****************************************/
/* SRv6 LocalSID instantiation and removal functions */
static int
srv6_ad_localsid_creation_fn (ip6_sr_localsid_t * localsid)
{
  ip6_sr_main_t *srm = &sr_main;
  srv6_ad_main_t *sm = &srv6_ad_main;
  srv6_ad_localsid_t *ls_mem = localsid->plugin_mem;
  u32 localsid_index = localsid - srm->localsids;

  /* Step 1: Prepare xconnect adjacency for sending packets to the VNF */

  /* Retrieve the adjacency corresponding to the (OIF, next_hop) */
  adj_index_t nh_adj_index = ADJ_INDEX_INVALID;
  if (ls_mem->ip_version == DA_IP4)
    nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4,
					VNET_LINK_IP4, &ls_mem->nh_addr,
					ls_mem->sw_if_index_out);
  else if (ls_mem->ip_version == DA_IP6)
    nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6,
					VNET_LINK_IP6, &ls_mem->nh_addr,
					ls_mem->sw_if_index_out);
  if (nh_adj_index == ADJ_INDEX_INVALID)
    return -5;

  ls_mem->nh_adj = nh_adj_index;


  /* Step 2: Prepare inbound policy for packets returning from the VNF */

  /* Sanitise the SW_IF_INDEX */
  if (pool_is_free_index (<