X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=test%2Ftemplate_ipsec.py;h=57c84342cb71a6e1d20a94d4aebf3dfe7cd1ee0b;hb=5b8911020ee5512d76c8daccaa199878ed7cbc01;hp=918c99383af68ff8155e1dc902b9b7de22b580e8;hpb=751bb131ef504b64fe82f393df21dba95ca92e97;p=vpp.git diff --git a/test/template_ipsec.py b/test/template_ipsec.py index 918c99383af..57c84342cb7 100644 --- a/test/template_ipsec.py +++ b/test/template_ipsec.py @@ -37,6 +37,11 @@ class IPsecIPv4Params: self.vpp_tra_sa_id = 400 self.vpp_tra_spi = 4000 + self.outer_hop_limit = 64 + self.inner_hop_limit = 255 + self.outer_flow_label = 0 + self.inner_flow_label = 0x12345 + self.auth_algo_vpp_id = (VppEnum.vl_api_ipsec_integ_alg_t. IPSEC_API_INTEG_ALG_SHA1_96) self.auth_algo = 'HMAC-SHA1-96' # scapy name @@ -52,6 +57,7 @@ class IPsecIPv4Params: self.tun_flags = (VppEnum.vl_api_tunnel_encap_decap_flags_t. TUNNEL_API_ENCAP_DECAP_FLAG_NONE) self.dscp = 0 + self.async_mode = False class IPsecIPv6Params: @@ -76,6 +82,11 @@ class IPsecIPv6Params: self.vpp_tra_sa_id = 800 self.vpp_tra_spi = 4000 + self.outer_hop_limit = 64 + self.inner_hop_limit = 255 + self.outer_flow_label = 0 + self.inner_flow_label = 0x12345 + self.auth_algo_vpp_id = (VppEnum.vl_api_ipsec_integ_alg_t. IPSEC_API_INTEG_ALG_SHA1_96) self.auth_algo = 'HMAC-SHA1-96' # scapy name @@ -91,6 +102,7 @@ class IPsecIPv6Params: self.tun_flags = (VppEnum.vl_api_tunnel_encap_decap_flags_t. TUNNEL_API_ENCAP_DECAP_FLAG_NONE) self.dscp = 0 + self.async_mode = False def mk_scapy_crypt_key(p): @@ -242,7 +254,9 @@ class TemplateIpsec(VppTestCase): def gen_encrypt_pkts6(self, p, sa, sw_intf, src, dst, count=1, payload_size=54): return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) / - sa.encrypt(IPv6(src=src, dst=dst) / + sa.encrypt(IPv6(src=src, dst=dst, + hlim=p.inner_hop_limit, + fl=p.inner_flow_label) / ICMPv6EchoRequest(id=0, seq=1, data='X' * payload_size)) for i in range(count)] @@ -252,9 +266,10 @@ class TemplateIpsec(VppTestCase): IP(src=src, dst=dst) / ICMP() / Raw(b'X' * payload_size) for i in range(count)] - def gen_pkts6(self, sw_intf, src, dst, count=1, payload_size=54): + def gen_pkts6(self, p, sw_intf, src, dst, count=1, payload_size=54): return [Ether(src=sw_intf.remote_mac, dst=sw_intf.local_mac) / - IPv6(src=src, dst=dst) / + IPv6(src=src, dst=dst, + hlim=p.inner_hop_limit, fl=p.inner_flow_label) / ICMPv6EchoRequest(id=0, seq=1, data='X' * payload_size) for i in range(count)] @@ -282,28 +297,240 @@ class IpsecTcpTests(IpsecTcp): class IpsecTra4(object): """ verify methods for Transport v4 """ - def verify_tra_anti_replay(self): - p = self.params[socket.AF_INET] - esn_en = p.vpp_tra_sa.esn_en - - seq_cycle_node_name = ('/err/%s/sequence number cycled' % - self.tra4_encrypt_node_name) + def get_replay_counts(self, p): replay_node_name = ('/err/%s/SA replayed packet' % - self.tra4_decrypt_node_name) + self.tra4_decrypt_node_name[0]) + count = self.statistics.get_err_counter(replay_node_name) + + if p.async_mode: + replay_post_node_name = ('/err/%s/SA replayed packet' % + self.tra4_decrypt_node_name[p.async_mode]) + count += self.statistics.get_err_counter(replay_post_node_name) + + return count + + def get_hash_failed_counts(self, p): if ESP == self.encryption_type and p.crypt_algo == "AES-GCM": hash_failed_node_name = ('/err/%s/ESP decryption failed' % - self.tra4_decrypt_node_name) + self.tra4_decrypt_node_name[p.async_mode]) else: hash_failed_node_name = ('/err/%s/Integrity check failed' % - self.tra4_decrypt_node_name) - replay_count = self.statistics.get_err_counter(replay_node_name) - hash_failed_count = self.statistics.get_err_counter( - hash_failed_node_name) + self.tra4_decrypt_node_name[p.async_mode]) + count = self.statistics.get_err_counter(hash_failed_node_name) + + if p.async_mode: + count += self.statistics.get_err_counter( + '/err/crypto-dispatch/bad-hmac') + + return count + + def verify_hi_seq_num(self): + p = self.params[socket.AF_INET] + saf = VppEnum.vl_api_ipsec_sad_flags_t + esn_on = p.vpp_tra_sa.esn_en + ar_on = p.flags & saf.IPSEC_API_SAD_FLAG_USE_ANTI_REPLAY + + seq_cycle_node_name = \ + ('/err/%s/sequence number cycled (packet dropped)' % + self.tra4_encrypt_node_name) + replay_count = self.get_replay_counts(p) + hash_failed_count = self.get_hash_failed_counts(p) + seq_cycle_count = self.statistics.get_err_counter(seq_cycle_node_name) + + # a few packets so we get the rx seq number above the window size and + # thus can simulate a wrap with an out of window packet + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=seq)) + for seq in range(63, 80)] + recv_pkts = self.send_and_expect(self.tra_if, pkts, self.tra_if) + + # these 4 packets will all choose seq-num 0 to decrpyt since none + # are out of window when first checked. however, once #200 has + # decrypted it will move the window to 200 and has #81 is out of + # window. this packet should be dropped. + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=200)), + (Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=81)), + (Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=201)), + (Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=202))] + + # if anti-replay is off then we won't drop #81 + n_rx = 3 if ar_on else 4 + self.send_and_expect(self.tra_if, pkts, self.tra_if, n_rx=n_rx) + # this packet is one before the wrap + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=203))] + recv_pkts = self.send_and_expect(self.tra_if, pkts, self.tra_if) + + # move the window over half way to a wrap + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x80000001))] + recv_pkts = self.send_and_expect(self.tra_if, pkts, self.tra_if) + + # anti-replay will drop old packets, no anti-replay will not + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x44000001))] + + if ar_on: + self.send_and_assert_no_replies(self.tra_if, pkts) + else: + recv_pkts = self.send_and_expect(self.tra_if, pkts, self.tra_if) + + if esn_on: + # + # validate wrapping the ESN + # + + # wrap scapy's TX SA SN + p.scapy_tra_sa.seq_num = 0x100000005 + + # send a packet that wraps the window for both AR and no AR + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x100000005))] + + rxs = self.send_and_expect(self.tra_if, pkts, self.tra_if) + for rx in rxs: + decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) + + # move the window forward to half way to the next wrap + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x180000005))] + + rxs = self.send_and_expect(self.tra_if, pkts, self.tra_if) + + # a packet less than 2^30 from the current position is: + # - AR: out of window and dropped + # - non-AR: accepted + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x170000005))] + + if ar_on: + self.send_and_assert_no_replies(self.tra_if, pkts) + else: + self.send_and_expect(self.tra_if, pkts, self.tra_if) + + # a packet more than 2^30 from the current position is: + # - AR: out of window and dropped + # - non-AR: considered a wrap, but since it's not a wrap + # it won't decrpyt and so will be dropped + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x130000005))] + + self.send_and_assert_no_replies(self.tra_if, pkts) + + # a packet less than 2^30 from the current position and is a + # wrap; (the seq is currently at 0x180000005). + # - AR: out of window so considered a wrap, so accepted + # - non-AR: not considered a wrap, so won't decrypt + p.scapy_tra_sa.seq_num = 0x260000005 + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x260000005))] + if ar_on: + self.send_and_expect(self.tra_if, pkts, self.tra_if) + else: + self.send_and_assert_no_replies(self.tra_if, pkts) + + # + # window positions are different now for AR/non-AR + # move non-AR forward + # + if not ar_on: + # a packet more than 2^30 from the current position and is a + # wrap; (the seq is currently at 0x180000005). + # - AR: accepted + # - non-AR: not considered a wrap, so won't decrypt + + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x200000005)), + (Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x200000006))] + self.send_and_expect(self.tra_if, pkts, self.tra_if) + + pkts = [(Ether(src=self.tra_if.remote_mac, + dst=self.tra_if.local_mac) / + p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, + dst=self.tra_if.local_ip4) / + ICMP(), + seq_num=0x260000005))] + self.send_and_expect(self.tra_if, pkts, self.tra_if) + + def verify_tra_anti_replay(self): + p = self.params[socket.AF_INET] + esn_en = p.vpp_tra_sa.esn_en + + seq_cycle_node_name = \ + ('/err/%s/sequence number cycled (packet dropped)' % + self.tra4_encrypt_node_name) + replay_count = self.get_replay_counts(p) + hash_failed_count = self.get_hash_failed_counts(p) seq_cycle_count = self.statistics.get_err_counter(seq_cycle_node_name) if ESP == self.encryption_type: undersize_node_name = ('/err/%s/undersized packet' % - self.tra4_decrypt_node_name) + self.tra4_decrypt_node_name[0]) undersize_count = self.statistics.get_err_counter( undersize_node_name) @@ -325,14 +552,16 @@ class IpsecTra4(object): recv_pkts = self.send_and_expect(self.tra_if, pkts, self.tra_if) # replayed packets are dropped - self.send_and_assert_no_replies(self.tra_if, pkts) + self.send_and_assert_no_replies(self.tra_if, pkts, timeout=0.2) replay_count += len(pkts) - self.assert_error_counter_equal(replay_node_name, replay_count) + self.assertEqual(self.get_replay_counts(p), replay_count) # # now send a batch of packets all with the same sequence number # the first packet in the batch is legitimate, the rest bogus # + self.vapi.cli("clear error") + self.vapi.cli("clear node counters") pkts = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, @@ -342,11 +571,12 @@ class IpsecTra4(object): recv_pkts = self.send_and_expect(self.tra_if, pkts * 8, self.tra_if, n_rx=1) replay_count += 7 - self.assert_error_counter_equal(replay_node_name, replay_count) + self.assertEqual(self.get_replay_counts(p), replay_count) # # now move the window over to 257 (more than one byte) and into Case A # + self.vapi.cli("clear error") pkt = (Ether(src=self.tra_if.remote_mac, dst=self.tra_if.local_mac) / p.scapy_tra_sa.encrypt(IP(src=self.tra_if.remote_ip4, @@ -356,9 +586,9 @@ class IpsecTra4(object): recv_pkts = self.send_and_expect(self.tra_if, [pkt], self.tra_if) # replayed packets are dropped - self.send_and_assert_no_replies(self.tra_if, pkt * 3) + self.send_and_assert_no_replies(self.tra_if, pkt * 3, timeout=0.2) replay_count += 3 - self.assert_error_counter_equal(replay_node_name, replay_count) + self.assertEqual(self.get_replay_counts(p), replay_count) # the window size is 64 packets # in window are still accepted @@ -383,11 +613,10 @@ class IpsecTra4(object): dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) - self.send_and_assert_no_replies(self.tra_if, pkt * 17) + self.send_and_assert_no_replies(self.tra_if, pkt * 17, timeout=0.2) hash_failed_count += 17 - self.assert_error_counter_equal(hash_failed_node_name, - hash_failed_count) + self.assertEqual(self.get_hash_failed_counts(p), hash_failed_count) # a malformed 'runt' packet # created by a mis-constructed SA @@ -400,7 +629,7 @@ class IpsecTra4(object): dst=self.tra_if.local_ip4) / ICMP(), seq_num=350)) - self.send_and_assert_no_replies(self.tra_if, pkt * 17) + self.send_and_assert_no_replies(self.tra_if, pkt * 17, timeout=0.2) undersize_count += 17 self.assert_error_counter_equal(undersize_node_name, @@ -426,19 +655,17 @@ class IpsecTra4(object): dst=self.tra_if.local_ip4) / ICMP(), seq_num=17)) - self.send_and_assert_no_replies(self.tra_if, pkt * 17) + self.send_and_assert_no_replies(self.tra_if, pkt * 17, timeout=0.2) if esn_en: # an out of window error with ESN looks like a high sequence # wrap. but since it isn't then the verify will fail. hash_failed_count += 17 - self.assert_error_counter_equal(hash_failed_node_name, - hash_failed_count) + self.assertEqual(self.get_hash_failed_counts(p), hash_failed_count) else: replay_count += 17 - self.assert_error_counter_equal(replay_node_name, - replay_count) + self.assertEqual(self.get_replay_counts(p), replay_count) # valid packet moves the window over to 258 pkt = (Ether(src=self.tra_if.remote_mac, @@ -492,6 +719,7 @@ class IpsecTra4(object): ICMP(), seq_num=0x100000005)) rx = self.send_and_expect(self.tra_if, [pkt], self.tra_if) + decrypted = p.vpp_tra_sa.decrypt(rx[0][IP]) # @@ -510,7 +738,7 @@ class IpsecTra4(object): # # While in case A we cannot wrap the high sequence number again - # becuase VPP will consider this packet to be one that moves the + # because VPP will consider this packet to be one that moves the # window forward # pkt = (Ether(src=self.tra_if.remote_mac, @@ -519,14 +747,14 @@ class IpsecTra4(object): dst=self.tra_if.local_ip4) / ICMP(), seq_num=0x200000999)) - self.send_and_assert_no_replies(self.tra_if, [pkt], self.tra_if) + self.send_and_assert_no_replies(self.tra_if, [pkt], self.tra_if, + timeout=0.2) hash_failed_count += 1 - self.assert_error_counter_equal(hash_failed_node_name, - hash_failed_count) + self.assertEqual(self.get_hash_failed_counts(p), hash_failed_count) # - # but if we move the wondow forward to case B, then we can wrap + # but if we move the window forward to case B, then we can wrap # again # p.scapy_tra_sa.seq_num = 0x100000555 @@ -554,7 +782,7 @@ class IpsecTra4(object): # without ESN TX sequence numbers can't wrap and packets are # dropped from here on out. # - self.send_and_assert_no_replies(self.tra_if, pkts) + self.send_and_assert_no_replies(self.tra_if, pkts, timeout=0.2) seq_cycle_count += len(pkts) self.assert_error_counter_equal(seq_cycle_node_name, seq_cycle_count) @@ -600,7 +828,7 @@ class IpsecTra4(object): (count, pkts)) self.assert_packet_counter_equal(self.tra4_encrypt_node_name, count) - self.assert_packet_counter_equal(self.tra4_decrypt_node_name, count) + self.assert_packet_counter_equal(self.tra4_decrypt_node_name[0], count) class IpsecTra4Tests(IpsecTra4): @@ -654,7 +882,7 @@ class IpsecTra6(object): "incorrect SA out counts: expected %d != %d" % (count, pkts)) self.assert_packet_counter_equal(self.tra6_encrypt_node_name, count) - self.assert_packet_counter_equal(self.tra6_decrypt_node_name, count) + self.assert_packet_counter_equal(self.tra6_decrypt_node_name[0], count) def gen_encrypt_pkts_ext_hdrs6(self, sa, sw_intf, src, dst, count=1, payload_size=54): @@ -803,7 +1031,7 @@ class IpsecTun4(object): (count, pkts)) self.assert_packet_counter_equal(self.tun4_encrypt_node_name, n_frags) - self.assert_packet_counter_equal(self.tun4_decrypt_node_name, count) + self.assert_packet_counter_equal(self.tun4_decrypt_node_name[0], count) def verify_decrypted(self, p, rxs): for rx in rxs: @@ -945,7 +1173,7 @@ class IpsecTun4(object): self.assert_equal(recv_pkt[IPv6].src, p.remote_tun_if_host6) self.assert_equal(recv_pkt[IPv6].dst, self.pg1.remote_ip6) self.assert_packet_checksums_valid(recv_pkt) - send_pkts = self.gen_pkts6(self.pg1, src=self.pg1.remote_ip6, + send_pkts = self.gen_pkts6(p, self.pg1, src=self.pg1.remote_ip6, dst=p.remote_tun_if_host6, count=count) recv_pkts = self.send_and_expect(self.pg1, send_pkts, self.tun_if) for recv_pkt in recv_pkts: @@ -1021,7 +1249,7 @@ class IpsecTun6(object): "incorrect SA out counts: expected %d != %d" % (count, pkts)) self.assert_packet_counter_equal(self.tun6_encrypt_node_name, count) - self.assert_packet_counter_equal(self.tun6_decrypt_node_name, count) + self.assert_packet_counter_equal(self.tun6_decrypt_node_name[0], count) def verify_decrypted6(self, p, rxs): for rx in rxs: @@ -1034,6 +1262,9 @@ class IpsecTun6(object): self.assert_packet_checksums_valid(rx) self.assertEqual(len(rx) - len(Ether()) - len(IPv6()), rx[IPv6].plen) + self.assert_equal(rx[IPv6].hlim, p.outer_hop_limit) + if p.outer_flow_label: + self.assert_equal(rx[IPv6].fl, p.outer_flow_label) try: decrypt_pkt = p.vpp_tun_sa.decrypt(rx[IPv6]) if not decrypt_pkt.haslayer(IPv6): @@ -1041,6 +1272,8 @@ class IpsecTun6(object): self.assert_packet_checksums_valid(decrypt_pkt) self.assert_equal(decrypt_pkt.src, self.pg1.remote_ip6) self.assert_equal(decrypt_pkt.dst, p.remote_tun_if_host) + self.assert_equal(decrypt_pkt.hlim, p.inner_hop_limit - 1) + self.assert_equal(decrypt_pkt.fl, p.inner_flow_label) except: self.logger.debug(ppp("Unexpected packet:", rx)) try: @@ -1076,7 +1309,7 @@ class IpsecTun6(object): recv_pkts = self.send_and_expect(self.tun_if, send_pkts, self.pg1) self.verify_decrypted6(p_in, recv_pkts) - send_pkts = self.gen_pkts6(self.pg1, src=self.pg1.remote_ip6, + send_pkts = self.gen_pkts6(p_in, self.pg1, src=self.pg1.remote_ip6, dst=p_out.remote_tun_if_host, count=count, payload_size=payload_size) @@ -1108,7 +1341,7 @@ class IpsecTun6(object): self.pg1, n_rx=1) self.verify_decrypted6(p, recv_pkts) - send_pkts = self.gen_pkts6(self.pg1, src=self.pg1.remote_ip6, + send_pkts = self.gen_pkts6(p, self.pg1, src=self.pg1.remote_ip6, dst=p.remote_tun_if_host, count=1, payload_size=64) @@ -1180,10 +1413,13 @@ class IpsecTun6Tests(IpsecTun6): class IpsecTun6HandoffTests(IpsecTun6): """ UT test methods for Tunnel v6 with multiple workers """ - worker_config = "workers 2" + vpp_worker_count = 2 def test_tun_handoff_66(self): """ ipsec 6o6 tunnel worker hand-off test """ + self.vapi.cli("clear errors") + self.vapi.cli("clear ipsec sa") + N_PKTS = 15 p = self.params[socket.AF_INET6] @@ -1198,7 +1434,7 @@ class IpsecTun6HandoffTests(IpsecTun6): self.pg1, worker=worker) self.verify_decrypted6(p, recv_pkts) - send_pkts = self.gen_pkts6(self.pg1, src=self.pg1.remote_ip6, + send_pkts = self.gen_pkts6(p, self.pg1, src=self.pg1.remote_ip6, dst=p.remote_tun_if_host, count=N_PKTS) recv_pkts = self.send_and_expect(self.pg1, send_pkts, @@ -1211,10 +1447,13 @@ class IpsecTun6HandoffTests(IpsecTun6): class IpsecTun4HandoffTests(IpsecTun4): """ UT test methods for Tunnel v4 with multiple workers """ - worker_config = "workers 2" + vpp_worker_count = 2 def test_tun_handooff_44(self): """ ipsec 4o4 tunnel worker hand-off test """ + self.vapi.cli("clear errors") + self.vapi.cli("clear ipsec sa") + N_PKTS = 15 p = self.params[socket.AF_INET]