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authorPratikshya Prasai <pratikshyaprasai2112@gmail.com>2022-08-18 11:09:38 -0400
committerDave Wallace <dwallacelf@gmail.com>2022-11-09 21:22:33 -0500
commit657bdf781ae876c945ca034e52cf25cccb09f71e (patch)
tree9ae70d0cb644ea9f609509ba4e83c84f687a264e /test/test_ipsec_spd_flow_cache_output.py
parent4dbd641136db81ba969a5a1c0374ec9c24525526 (diff)
tests: initial asf framework refactoring for 'make test'
Type: refactor Change-Id: I41455b759a5d302ad5c4247c13634c471e7d49a8 Signed-off-by: Pratikshya Prasai <pratikshyaprasai2112@gmail.com> Signed-off-by: Saima Yunus <yunus.saima.234@gmail.com> Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
Diffstat (limited to 'test/test_ipsec_spd_flow_cache_output.py')
-rw-r--r--test/test_ipsec_spd_flow_cache_output.py765
1 files changed, 0 insertions, 765 deletions
diff --git a/test/test_ipsec_spd_flow_cache_output.py b/test/test_ipsec_spd_flow_cache_output.py
deleted file mode 100644
index 8af3b6cfcda..00000000000
--- a/test/test_ipsec_spd_flow_cache_output.py
+++ /dev/null
@@ -1,765 +0,0 @@
-import socket
-import unittest
-
-from util import ppp
-from framework import VppTestRunner
-from template_ipsec import SpdFlowCacheTemplate
-
-
-class SpdFlowCacheOutbound(SpdFlowCacheTemplate):
- # Override setUpConstants to enable outbound flow cache in config
- @classmethod
- def setUpConstants(cls):
- super(SpdFlowCacheOutbound, cls).setUpConstants()
- cls.vpp_cmdline.extend(["ipsec", "{", "ipv4-outbound-spd-flow-cache on", "}"])
- cls.logger.info("VPP modified cmdline is %s" % " ".join(cls.vpp_cmdline))
-
-
-class IPSec4SpdTestCaseAdd(SpdFlowCacheOutbound):
- """ IPSec/IPv4 outbound: Policy mode test case with flow cache \
- (add rule)"""
-
- def test_ipsec_spd_outbound_add(self):
- # In this test case, packets in IPv4 FWD path are configured
- # to go through IPSec outbound SPD policy lookup.
- # 2 SPD rules (1 HIGH and 1 LOW) are added.
- # High priority rule action is set to BYPASS.
- # Low priority rule action is set to DISCARD.
- # Traffic sent on pg0 interface should match high priority
- # rule and should be sent out on pg1 interface.
- self.create_interfaces(2)
- pkt_count = 5
- self.spd_create_and_intf_add(1, [self.pg1])
- policy_0 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- policy_1 = self.spd_add_rem_policy( # outbound, priority 5
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=5,
- policy_type="discard",
- )
-
- # check flow cache is empty before sending traffic
- self.verify_num_outbound_flow_cache_entries(0)
-
- # create the packet stream
- packets = self.create_stream(self.pg0, self.pg1, pkt_count)
- # add the stream to the source interface + enable capture
- self.pg0.add_stream(packets)
- self.pg0.enable_capture()
- self.pg1.enable_capture()
- # start the packet generator
- self.pg_start()
- # get capture
- capture = self.pg1.get_capture()
- for packet in capture:
- try:
- self.logger.debug(ppp("SPD - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
- self.logger.debug("SPD: Num packets: %s", len(capture.res))
-
- # assert nothing captured on pg0
- self.pg0.assert_nothing_captured()
- # verify captured packets
- self.verify_capture(self.pg0, self.pg1, capture)
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(0, policy_1)
- # check policy in SPD has been cached after traffic
- # matched BYPASS rule in SPD
- self.verify_num_outbound_flow_cache_entries(1)
-
-
-class IPSec4SpdTestCaseRemoveOutbound(SpdFlowCacheOutbound):
- """ IPSec/IPv4 outbound: Policy mode test case with flow cache \
- (remove rule)"""
-
- def test_ipsec_spd_outbound_remove(self):
- # In this test case, packets in IPv4 FWD path are configured
- # to go through IPSec outbound SPD policy lookup.
- # 2 SPD rules (1 HIGH and 1 LOW) are added.
- # High priority rule action is set to BYPASS.
- # Low priority rule action is set to DISCARD.
- # High priority rule is then removed.
- # Traffic sent on pg0 interface should match low priority
- # rule and should be discarded after SPD lookup.
- self.create_interfaces(2)
- pkt_count = 5
- self.spd_create_and_intf_add(1, [self.pg1])
- policy_0 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- policy_1 = self.spd_add_rem_policy( # outbound, priority 5
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=5,
- policy_type="discard",
- )
-
- # check flow cache is empty before sending traffic
- self.verify_num_outbound_flow_cache_entries(0)
-
- # create the packet stream
- packets = self.create_stream(self.pg0, self.pg1, pkt_count)
- # add the stream to the source interface + enable capture
- self.pg0.add_stream(packets)
- self.pg0.enable_capture()
- self.pg1.enable_capture()
- # start the packet generator
- self.pg_start()
- # get capture
- capture = self.pg1.get_capture()
- for packet in capture:
- try:
- self.logger.debug(ppp("SPD - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
-
- # assert nothing captured on pg0
- self.pg0.assert_nothing_captured()
- # verify capture on pg1
- self.logger.debug("SPD: Num packets: %s", len(capture.res))
- self.verify_capture(self.pg0, self.pg1, capture)
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(0, policy_1)
- # check policy in SPD has been cached after traffic
- # matched BYPASS rule in SPD
- self.verify_num_outbound_flow_cache_entries(1)
-
- # now remove the bypass rule
- self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- remove=True,
- )
- # verify flow cache counter has been reset by rule removal
- self.verify_num_outbound_flow_cache_entries(0)
-
- # resend the same packets
- self.pg0.add_stream(packets)
- self.pg0.enable_capture() # flush the old captures
- self.pg1.enable_capture()
- self.pg_start()
- # assert nothing captured on pg0
- self.pg0.assert_nothing_captured()
- # all packets will be dropped by SPD rule
- self.pg1.assert_nothing_captured()
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(pkt_count, policy_1)
- # previous stale entry in flow cache should have been overwritten,
- # with one active entry
- self.verify_num_outbound_flow_cache_entries(1)
-
-
-class IPSec4SpdTestCaseReaddOutbound(SpdFlowCacheOutbound):
- """ IPSec/IPv4 outbound: Policy mode test case with flow cache \
- (add, remove, re-add)"""
-
- def test_ipsec_spd_outbound_readd(self):
- # In this test case, packets in IPv4 FWD path are configured
- # to go through IPSec outbound SPD policy lookup.
- # 2 SPD rules (1 HIGH and 1 LOW) are added.
- # High priority rule action is set to BYPASS.
- # Low priority rule action is set to DISCARD.
- # Traffic sent on pg0 interface should match high priority
- # rule and should be sent out on pg1 interface.
- # High priority rule is then removed.
- # Traffic sent on pg0 interface should match low priority
- # rule and should be discarded after SPD lookup.
- # Readd high priority rule.
- # Traffic sent on pg0 interface should match high priority
- # rule and should be sent out on pg1 interface.
- self.create_interfaces(2)
- pkt_count = 5
- self.spd_create_and_intf_add(1, [self.pg1])
- policy_0 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- policy_1 = self.spd_add_rem_policy( # outbound, priority 5
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=5,
- policy_type="discard",
- )
-
- # check flow cache is empty before sending traffic
- self.verify_num_outbound_flow_cache_entries(0)
-
- # create the packet stream
- packets = self.create_stream(self.pg0, self.pg1, pkt_count)
- # add the stream to the source interface + enable capture
- self.pg0.add_stream(packets)
- self.pg0.enable_capture()
- self.pg1.enable_capture()
- # start the packet generator
- self.pg_start()
- # get capture
- capture = self.pg1.get_capture()
- for packet in capture:
- try:
- self.logger.debug(ppp("SPD - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
- self.logger.debug("SPD: Num packets: %s", len(capture.res))
-
- # assert nothing captured on pg0
- self.pg0.assert_nothing_captured()
- # verify capture on pg1
- self.verify_capture(self.pg0, self.pg1, capture)
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(0, policy_1)
- # check policy in SPD has been cached after traffic
- # matched BYPASS rule in SPD
- self.verify_num_outbound_flow_cache_entries(1)
-
- # now remove the bypass rule, leaving only the discard rule
- self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- remove=True,
- )
- # verify flow cache counter has been reset by rule removal
- self.verify_num_outbound_flow_cache_entries(0)
-
- # resend the same packets
- self.pg0.add_stream(packets)
- self.pg0.enable_capture() # flush the old captures
- self.pg1.enable_capture()
- self.pg_start()
-
- # assert nothing captured on pg0
- self.pg0.assert_nothing_captured()
- # all packets will be dropped by SPD rule
- self.pg1.assert_nothing_captured()
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(pkt_count, policy_1)
- # previous stale entry in flow cache should have been overwritten
- self.verify_num_outbound_flow_cache_entries(1)
-
- # now readd the bypass rule
- policy_0 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- # verify flow cache counter has been reset by rule addition
- self.verify_num_outbound_flow_cache_entries(0)
-
- # resend the same packets
- self.pg0.add_stream(packets)
- self.pg0.enable_capture() # flush the old captures
- self.pg1.enable_capture()
- self.pg_start()
-
- # get capture
- capture = self.pg1.get_capture(pkt_count)
- for packet in capture:
- try:
- self.logger.debug(ppp("SPD - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
- self.logger.debug("SPD: Num packets: %s", len(capture.res))
-
- # assert nothing captured on pg0
- self.pg0.assert_nothing_captured()
- # verify captured packets
- self.verify_capture(self.pg0, self.pg1, capture)
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(pkt_count, policy_1)
- # previous stale entry in flow cache should have been overwritten
- self.verify_num_outbound_flow_cache_entries(1)
-
-
-class IPSec4SpdTestCaseMultipleOutbound(SpdFlowCacheOutbound):
- """ IPSec/IPv4 outbound: Policy mode test case with flow cache \
- (multiple interfaces, multiple rules)"""
-
- def test_ipsec_spd_outbound_multiple(self):
- # In this test case, packets in IPv4 FWD path are configured to go
- # through IPSec outbound SPD policy lookup.
- # Multiples rules on multiple interfaces are tested at the same time.
- # 3x interfaces are configured, binding the same SPD to each.
- # Each interface has 2 SPD rules (1 BYPASS and 1 DISCARD).
- # On pg0 & pg1, the BYPASS rule is HIGH priority
- # On pg2, the DISCARD rule is HIGH priority
- # Traffic should be received on pg0 & pg1 and dropped on pg2.
- self.create_interfaces(3)
- pkt_count = 5
- # bind SPD to all interfaces
- self.spd_create_and_intf_add(1, self.pg_interfaces)
- # add rules on all interfaces
- policy_01 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- policy_02 = self.spd_add_rem_policy( # outbound, priority 5
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=5,
- policy_type="discard",
- )
-
- policy_11 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg1,
- self.pg2,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- policy_12 = self.spd_add_rem_policy( # outbound, priority 5
- 1,
- self.pg1,
- self.pg2,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=5,
- policy_type="discard",
- )
-
- policy_21 = self.spd_add_rem_policy( # outbound, priority 5
- 1,
- self.pg2,
- self.pg0,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=5,
- policy_type="bypass",
- )
- policy_22 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg2,
- self.pg0,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="discard",
- )
-
- # interfaces bound to an SPD, will by default drop inbound
- # traffic with no matching policies. add catch-all inbound
- # bypass rule to SPD:
- self.spd_add_rem_policy( # inbound, all interfaces
- 1,
- None,
- None,
- socket.IPPROTO_UDP,
- is_out=0,
- priority=10,
- policy_type="bypass",
- all_ips=True,
- )
-
- # check flow cache is empty (0 active elements) before sending traffic
- self.verify_num_outbound_flow_cache_entries(0)
-
- # create the packet streams
- packets0 = self.create_stream(self.pg0, self.pg1, pkt_count)
- packets1 = self.create_stream(self.pg1, self.pg2, pkt_count)
- packets2 = self.create_stream(self.pg2, self.pg0, pkt_count)
- # add the streams to the source interfaces
- self.pg0.add_stream(packets0)
- self.pg1.add_stream(packets1)
- self.pg2.add_stream(packets2)
- # enable capture on all interfaces
- for pg in self.pg_interfaces:
- pg.enable_capture()
- # start the packet generator
- self.pg_start()
-
- # get captures
- if_caps = []
- for pg in [self.pg1, self.pg2]: # we are expecting captures on pg1/pg2
- if_caps.append(pg.get_capture())
- for packet in if_caps[-1]:
- try:
- self.logger.debug(ppp("SPD - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
- self.logger.debug("SPD: Num packets: %s", len(if_caps[0].res))
- self.logger.debug("SPD: Num packets: %s", len(if_caps[1].res))
-
- # verify captures that matched BYPASS rule
- self.verify_capture(self.pg0, self.pg1, if_caps[0])
- self.verify_capture(self.pg1, self.pg2, if_caps[1])
- # verify that traffic to pg0 matched DISCARD rule and was dropped
- self.pg0.assert_nothing_captured()
- # verify all packets that were expected to match rules, matched
- # pg0 -> pg1
- self.verify_policy_match(pkt_count, policy_01)
- self.verify_policy_match(0, policy_02)
- # pg1 -> pg2
- self.verify_policy_match(pkt_count, policy_11)
- self.verify_policy_match(0, policy_12)
- # pg2 -> pg0
- self.verify_policy_match(0, policy_21)
- self.verify_policy_match(pkt_count, policy_22)
- # check that 3 matching policies in SPD have been cached
- self.verify_num_outbound_flow_cache_entries(3)
-
-
-class IPSec4SpdTestCaseOverwriteStaleOutbound(SpdFlowCacheOutbound):
- """ IPSec/IPv4 outbound: Policy mode test case with flow cache \
- (overwrite stale entries)"""
-
- def test_ipsec_spd_outbound_overwrite(self):
- # The operation of the flow cache is setup so that the entire cache
- # is invalidated when adding or removing an SPD policy rule.
- # For performance, old cache entries are not zero'd, but remain
- # in the table as "stale" entries. If a flow matches a stale entry,
- # and the epoch count does NOT match the current count, the entry
- # is overwritten.
- # In this test, 3 active rules are created and matched to enter
- # them into the flow cache.
- # A single entry is removed to invalidate the entire cache.
- # We then readd the rule and test that overwriting of the previous
- # stale entries occurs as expected, and that the flow cache entry
- # counter is updated correctly.
- self.create_interfaces(3)
- pkt_count = 2
- # bind SPD to all interfaces
- self.spd_create_and_intf_add(1, self.pg_interfaces)
- # add output rules on all interfaces
- # pg0 -> pg1
- policy_0 = self.spd_add_rem_policy( # outbound
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- # pg1 -> pg2
- policy_1 = self.spd_add_rem_policy( # outbound
- 1,
- self.pg1,
- self.pg2,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- # pg2 -> pg0
- policy_2 = self.spd_add_rem_policy( # outbound
- 1,
- self.pg2,
- self.pg0,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="discard",
- )
-
- # interfaces bound to an SPD, will by default drop inbound
- # traffic with no matching policies. add catch-all inbound
- # bypass rule to SPD:
- self.spd_add_rem_policy( # inbound, all interfaces
- 1,
- None,
- None,
- socket.IPPROTO_UDP,
- is_out=0,
- priority=10,
- policy_type="bypass",
- all_ips=True,
- )
-
- # check flow cache is empty (0 active elements) before sending traffic
- self.verify_num_outbound_flow_cache_entries(0)
-
- # create the packet streams
- packets0 = self.create_stream(self.pg0, self.pg1, pkt_count)
- packets1 = self.create_stream(self.pg1, self.pg2, pkt_count)
- packets2 = self.create_stream(self.pg2, self.pg0, pkt_count)
- # add the streams to the source interfaces
- self.pg0.add_stream(packets0)
- self.pg1.add_stream(packets1)
- self.pg2.add_stream(packets2)
- # enable capture on all interfaces
- for pg in self.pg_interfaces:
- pg.enable_capture()
- # start the packet generator
- self.pg_start()
-
- # get captures from ifs
- if_caps = []
- for pg in [self.pg1, self.pg2]: # we are expecting captures on pg1/pg2
- if_caps.append(pg.get_capture())
- for packet in if_caps[-1]:
- try:
- self.logger.debug(ppp("SPD Add - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
-
- # verify captures that matched BYPASS rules
- self.verify_capture(self.pg0, self.pg1, if_caps[0])
- self.verify_capture(self.pg1, self.pg2, if_caps[1])
- # verify that traffic to pg0 matched DISCARD rule and was dropped
- self.pg0.assert_nothing_captured()
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(pkt_count, policy_1)
- self.verify_policy_match(pkt_count, policy_2)
- # check flow/policy match was cached for: 3x output policies
- self.verify_num_outbound_flow_cache_entries(3)
-
- # adding an inbound policy should not invalidate output flow cache
- self.spd_add_rem_policy( # inbound
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=0,
- priority=10,
- policy_type="bypass",
- )
- # check flow cache counter has not been reset
- self.verify_num_outbound_flow_cache_entries(3)
-
- # remove a bypass policy - flow cache counter will be reset, and
- # there will be 3x stale entries in flow cache
- self.spd_add_rem_policy( # outbound
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- remove=True,
- )
- # readd policy
- policy_0 = self.spd_add_rem_policy( # outbound
- 1,
- self.pg0,
- self.pg1,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- # check counter was reset with flow cache invalidation
- self.verify_num_outbound_flow_cache_entries(0)
-
- # resend the same packets
- self.pg0.add_stream(packets0)
- self.pg1.add_stream(packets1)
- self.pg2.add_stream(packets2)
- for pg in self.pg_interfaces:
- pg.enable_capture() # flush previous captures
- self.pg_start()
-
- # get captures from ifs
- if_caps = []
- for pg in [self.pg1, self.pg2]: # we are expecting captures on pg1/pg2
- if_caps.append(pg.get_capture())
- for packet in if_caps[-1]:
- try:
- self.logger.debug(ppp("SPD Add - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
-
- # verify captures that matched BYPASS rules
- self.verify_capture(self.pg0, self.pg1, if_caps[0])
- self.verify_capture(self.pg1, self.pg2, if_caps[1])
- # verify that traffic to pg0 matched DISCARD rule and was dropped
- self.pg0.assert_nothing_captured()
- # verify all policies matched the expected number of times
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(pkt_count * 2, policy_1)
- self.verify_policy_match(pkt_count * 2, policy_2)
- # we are overwriting 3x stale entries - check flow cache counter
- # is correct
- self.verify_num_outbound_flow_cache_entries(3)
-
-
-class IPSec4SpdTestCaseCollisionOutbound(SpdFlowCacheOutbound):
- """ IPSec/IPv4 outbound: Policy mode test case with flow cache \
- (hash collision)"""
-
- # Override class setup to restrict vector size to 16 elements.
- # This forces using only the lower 4 bits of the hash as a key,
- # making hash collisions easy to find.
- @classmethod
- def setUpConstants(cls):
- super(SpdFlowCacheOutbound, cls).setUpConstants()
- cls.vpp_cmdline.extend(
- [
- "ipsec",
- "{",
- "ipv4-outbound-spd-flow-cache on",
- "ipv4-outbound-spd-hash-buckets 16",
- "}",
- ]
- )
- cls.logger.info("VPP modified cmdline is %s" % " ".join(cls.vpp_cmdline))
-
- def test_ipsec_spd_outbound_collision(self):
- # The flow cache operation is setup to overwrite an entry
- # if a hash collision occurs.
- # In this test, 2 packets are configured that result in a
- # hash with the same lower 4 bits.
- # After the first packet is received, there should be one
- # active entry in the flow cache.
- # After the second packet with the same lower 4 bit hash
- # is received, this should overwrite the same entry.
- # Therefore there will still be a total of one (1) entry,
- # in the flow cache with two matching policies.
- # crc32_supported() method is used to check cpu for crc32
- # intrinsic support for hashing.
- # If crc32 is not supported, we fall back to clib_xxhash()
- self.create_interfaces(3)
- pkt_count = 5
- # bind SPD to all interfaces
- self.spd_create_and_intf_add(1, self.pg_interfaces)
- # add rules
- policy_0 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg1,
- self.pg2,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
- policy_1 = self.spd_add_rem_policy( # outbound, priority 10
- 1,
- self.pg2,
- self.pg0,
- socket.IPPROTO_UDP,
- is_out=1,
- priority=10,
- policy_type="bypass",
- )
-
- # interfaces bound to an SPD, will by default drop inbound
- # traffic with no matching policies. add catch-all inbound
- # bypass rule to SPD:
- self.spd_add_rem_policy( # inbound, all interfaces
- 1,
- None,
- None,
- socket.IPPROTO_UDP,
- is_out=0,
- priority=10,
- policy_type="bypass",
- all_ips=True,
- )
-
- # check flow cache is empty (0 active elements) before sending traffic
- self.verify_num_outbound_flow_cache_entries(0)
-
- # create the packet streams generating collision on last 4 bits
- if self.crc32_supported():
- # packet hashes to:
- # 432c99c2
- packets1 = self.create_stream(self.pg1, self.pg2, pkt_count, 1, 1)
- # 31f8f3f2
- packets2 = self.create_stream(self.pg2, self.pg0, pkt_count, 6, 6)
- else: # clib_xxhash
- # ec3a258551bc0306
- packets1 = self.create_stream(self.pg1, self.pg2, pkt_count, 2, 2)
- # 61fee526d18d7a6
- packets2 = self.create_stream(self.pg2, self.pg0, pkt_count, 3, 3)
-
- # add the streams to the source interfaces
- self.pg1.add_stream(packets1)
- self.pg2.add_stream(packets2)
- # enable capture on all interfaces
- for pg in self.pg_interfaces:
- pg.enable_capture()
- # start the packet generator
- self.pg_start()
-
- # get captures from ifs - the proper pkt_count of packets was saved by
- # create_packet_info() based on dst_if parameter
- if_caps = []
- for pg in [self.pg2, self.pg0]: # we are expecting captures on pg2/pg0
- if_caps.append(pg.get_capture())
- for packet in if_caps[-1]:
- try:
- self.logger.debug(ppp("SPD - Got packet:", packet))
- except Exception:
- self.logger.error(ppp("Unexpected or invalid packet:", packet))
- raise
- self.logger.debug("SPD: Num packets: %s", len(if_caps[0].res))
- self.logger.debug("SPD: Num packets: %s", len(if_caps[1].res))
-
- # verify captures that matched BYPASS rule
- self.verify_capture(self.pg1, self.pg2, if_caps[0])
- self.verify_capture(self.pg2, self.pg0, if_caps[1])
- # verify all packets that were expected to match rules, matched
- self.verify_policy_match(pkt_count, policy_0)
- self.verify_policy_match(pkt_count, policy_1)
- # we have matched 2 policies, but due to the hash collision
- # one active entry is expected
- self.verify_num_outbound_flow_cache_entries(1)
-
-
-if __name__ == "__main__":
- unittest.main(testRunner=VppTestRunner)