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2020-01-02tests: bfd - move test_poll_response to EXTENDED_TESTSPaul Vinciguerra1-0/+2
test_bfd.BFD4TestCase.test_poll_response providing inconsistent results is the per-patch tests. Type: test Change-Id: I8f1864511526fd330a7da1abfa19be3f565c683a Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2019-12-05tests: move bfd over gre to extended testsPaul Vinciguerra1-0/+1
This test should be fixed or removed. EXTENDED_TESTS should not become "BROKEN_TESTS" Type: test Change-Id: Id998f0d3b7bd31100f917d076fbd7ddb46d99ed2 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2019-12-02tests: BFD python3 changessnaramre1-40/+5
Type: fix Change-Id: Ie441e81fe3971d70f96196c79d74658f910b4875 Signed-off-by: snaramre <snaramre@cisco.com>
2019-11-08tests: python3 use byte strings in raw()Ole Troan1-3/+3
Raw('\xaf) and Raw(b'\xaf) are two quite different things in python 2 versus 3. In most cases this didn't make a difference, apart from those cases where length of payload actually mattered. Type: fix Signed-off-by: Ole Troan <ot@cisco.com> Change-Id: I3cba5c1486e436a3ca8aa10a7b393da75aa9f6b9
2019-11-05misc: Fix python scripts shebang lineRenato Botelho do Couto1-1/+1
Type: fix Since CentOS 8, RPM build script doesn't accept '#!/usr/bin/env python' as a valid shebang line. It requires scripts to explicitly chose between python2 or python3. Change all to use python3 as suggested by Paul Vinciguerra. Depends-On: https://gerrit.fd.io/r/23170 Signed-off-by: Renato Botelho do Couto <renato@netgate.com> Change-Id: Ie72af9f60fd0609e07f05b70f8d96e738b2754d1
2019-09-04bfd: API cleanupJakub Grajciar1-33/+39
Use consistent API types. Type: fix Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com> Change-Id: I4b91ebe8aadbec8b95716ed1cde4b0a13eee3a3f Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
2019-06-18fib: fib api updatesNeale Ranns1-6/+2
Enhance the route add/del APIs to take a set of paths rather than just one. Most unicast routing protocols calcualte all the available paths in one run of the algorithm so updating all the paths at once is beneficial for the client. two knobs control the behaviour: is_multipath - if set the the set of paths passed will be added to those that already exist, otherwise the set will replace them. is_add - add or remove the set is_add=0, is_multipath=1 and an empty set, results in deleting the route. It is also considerably faster to add multiple paths at once, than one at a time: vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.11 100000 routes in .572240 secs, 174751.80 routes/sec vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.12 100000 routes in .528383 secs, 189256.54 routes/sec vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.13 100000 routes in .757131 secs, 132077.52 routes/sec vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.14 100000 routes in .878317 secs, 113854.12 routes/sec vat# ip_route_add_del 1.1.1.1/32 count 100000 multipath via 10.10.10.11 via 10.10.10.12 via 10.10.10.13 via 10.10.10.14 100000 routes in .900212 secs, 111084.93 routes/sec Change-Id: I416b93f7684745099c1adb0b33edac58c9339c1a Signed-off-by: Neale Ranns <neale.ranns@cisco.com> Signed-off-by: Ole Troan <ot@cisco.com> Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2019-06-07bfd: UT for BFD session over GRE tunnelNeale Ranns1-13/+107
Signed-off-by: Neale Ranns <nranns@cisco.com> Adding UT for BFD over GRE tunnel. Ticket: none Type: test Change-Id: I03eca4a0c7114cdc16fde9be4cd6db6216b8c845 Signed-off-by: Neale Ranns <nranns@cisco.com>
2019-03-11VPP-1508: Use scapy.compat to manage packet level library differences.Paul Vinciguerra1-13/+16
Change-Id: Icdf6abc9e53d33b26fd1d531c7dda6be0bb9cb55 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2019-03-11Tests: fix time.sleep(0) # yield. Reduce sleep related log messages.Paul Vinciguerra1-2/+2
Reduce the incidence of: 20:04:23,606 unexpected time.sleep() result - slept for 2.187967e-03s instead of ~6.837845e-04s! Change-Id: Ic576fda7f75e571c9019111588a6a936ee2cf5c2 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2019-02-04VTL Cleanup: Fix missing calls to setUpClass/tearDownClass, fix numerous ↵Paul Vinciguerra1-1/+32
TypeErrors. * TypeError: assertIsNotNone() got an unexpected keyword argument 'msg' * Correct missing calls to setUpClass/tearDownClass. If you want the setUpClass and tearDownClass on base classes called then you must call up to them yourself. The implementations in TestCase are empty. https://docs.python.org/2/library/unittest.html#setupclass-and-teardownclass Cleans up issues in parallel test mode: ------------- FAILURES AND ERRORS IN TESTS: Testcase name: VCL Thru Host Stack Bidir Nsock FAILURE: test_vcl.VCLThruHostStackBidirNsock.test_vcl_thru_host_stack_bi_dir_nsock [test_vcl.VCLThruHostStackBidirNsock.test_vcl_thru_host_stack_bi_dir_nsock] Testcase name: Bidirectional Forwarding Detection (BFD) (changing auth) ERROR: test_bfd.BFDAuthOnOffTestCase.test_auth_change_key_delayed [test_bfd.BFDAuthOnOffTestCase.test_auth_change_key_delayed] ERROR: test_bfd.BFDAuthOnOffTestCase.test_auth_change_key_immediate [test_bfd.BFDAuthOnOffTestCase.test_auth_change_key_immediate] ERROR: test_bfd.BFDAuthOnOffTestCase.test_auth_off_delayed [test_bfd.BFDAuthOnOffTestCase.test_auth_off_delayed] ERROR: test_bfd.BFDAuthOnOffTestCase.test_auth_off_immediate [test_bfd.BFDAuthOnOffTestCase.test_auth_off_immediate] ERROR: test_bfd.BFDAuthOnOffTestCase.test_auth_on_delayed [test_bfd.BFDAuthOnOffTestCase.test_auth_on_delayed] ERROR: test_bfd.BFDAuthOnOffTestCase.test_auth_on_immediate [test_bfd.BFDAuthOnOffTestCase.test_auth_on_immediate] Testcase name: Punt Socket for IPv4 ERROR: test_punt.TestIP4PuntSocket.test_punt_socket_dump [test_punt.TestIP4PuntSocket.test_punt_socket_dump] ERROR: test_punt.TestIP4PuntSocket.test_punt_socket_traffic_multi_port_multi_sockets [test_punt.TestIP4PuntSocket.test_punt_socket_traffic_multi_port_multi_sockets] ERROR: test_punt.TestIP4PuntSocket.test_punt_socket_traffic_multi_ports_single_socket [test_punt.TestIP4PuntSocket.test_punt_socket_traffic_multi_ports_single_socket] ERROR: test_punt.TestIP4PuntSocket.test_punt_socket_traffic_single_port_single_socket [test_punt.TestIP4PuntSocket.test_punt_socket_traffic_single_port_single_socket] Testcase name: Bidirectional Forwarding Detection (BFD) (IPv6) ERROR: test_bfd.BFD6TestCase.test_echo [test_bfd.BFD6TestCase.test_echo] ERROR: test_bfd.BFD6TestCase.test_echo_looped_back [test_bfd.BFD6TestCase.test_echo_looped_back] ERROR: test_bfd.BFD6TestCase.test_intf_deleted [test_bfd.BFD6TestCase.test_intf_deleted] ERROR: test_bfd.BFD6TestCase.test_session_up [test_bfd.BFD6TestCase.test_session_up] ERROR: test_bfd.BFD6TestCase.test_session_up_by_ip [test_bfd.BFD6TestCase.test_session_up_by_ip] Testcase name: Bidirectional Forwarding Detection (BFD) (CLI) ERROR: test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp [test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp] ERROR: test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp6 [test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp6] ERROR: test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp6_auth [test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp6_auth] ERROR: test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp_auth [test_bfd.BFDCLITestCase.test_add_mod_del_bfd_udp_auth] ERROR: test_bfd.BFDCLITestCase.test_admin_up_down [test_bfd.BFDCLITestCase.test_admin_up_down] ERROR: test_bfd.BFDCLITestCase.test_auth_on_off [test_bfd.BFDCLITestCase.test_auth_on_off] ERROR: test_bfd.BFDCLITestCase.test_auth_on_off_delayed [test_bfd.BFDCLITestCase.test_auth_on_off_delayed] ERROR: test_bfd.BFDCLITestCase.test_set_del_meticulous_sha1_key [test_bfd.BFDCLITestCase.test_set_del_meticulous_sha1_key] ERROR: test_bfd.BFDCLITestCase.test_set_del_sha1_key [test_bfd.BFDCLITestCase.test_set_del_sha1_key] ERROR: test_bfd.BFDCLITestCase.test_set_del_udp_echo_source [test_bfd.BFDCLITestCase.test_set_del_udp_echo_source] ERROR: test_bfd.BFDCLITestCase.test_show [test_bfd.BFDCLITestCase.test_show] Testcase name: VAPI test ERROR: test_vapi.VAPITestCase.test_vapi_c [test_vapi.VAPITestCase.test_vapi_c] Testcase name: Container integration extended testcases ERROR: test_container.ContainerIntegrationTestCase.test_0010_basic_conn_test [test_container.ContainerIntegrationTestCase.test_0010_basic_conn_test] ERROR: test_container.ContainerIntegrationTestCase.test_0011_basic_conn_test [test_container.ContainerIntegrationTestCase.test_0011_basic_conn_test] ERROR: test_container.ContainerIntegrationTestCase.test_0050_loopback_prepare_test [test_container.ContainerIntegrationTestCase.test_0050_loopback_prepare_test] ERROR: test_container.ContainerIntegrationTestCase.test_0110_basic_conn_test [test_container.ContainerIntegrationTestCase.test_0110_basic_conn_test] ERROR: test_container.ContainerIntegrationTestCase.test_0111_basic_conn_test [test_container.ContainerIntegrationTestCase.test_0111_basic_conn_test] ERROR: test_container.ContainerIntegrationTestCase.test_0200_basic_conn_test [test_container.ContainerIntegrationTestCase.test_0200_basic_conn_test] ERROR: test_container.ContainerIntegrationTestCase.test_0210_basic_conn_test [test_container.ContainerIntegrationTestCase.test_0210_basic_conn_test] ERROR: test_container.ContainerIntegrationTestCase.test_0211_basic_conn_test [test_container.ContainerIntegrationTestCase.test_0211_basic_conn_test] ERROR: test_container.ContainerIntegrationTestCase.test_0300_unconfigure_commands [test_container.ContainerIntegrationTestCase.test_0300_unconfigure_commands] ERROR: test_container.ContainerIntegrationTestCase.test_0410_spoof_test [test_container.ContainerIntegrationTestCase.test_0410_spoof_test] ERROR: test_container.ContainerIntegrationTestCase.test_0411_spoof_test [test_container.ContainerIntegrationTestCase.test_0411_spoof_test] Testcase name: Re-enable IPFIX ERROR: test_flowprobe.ReenableIPFIX.test_0011 [test_flowprobe.ReenableIPFIX.test_0011] Testcase name: VXLAN over IPv6 Test Case ERROR: setUpClass [setUpClass (test_vxlan6.TestVxlan6)] Testcase name: JVPP Core Test Case ERROR: test_jvpp.TestJVpp.test_vpp_acl_callback_api [test_jvpp.TestJVpp.test_vpp_acl_callback_api] ERROR: test_jvpp.TestJVpp.test_vpp_acl_future_api [test_jvpp.TestJVpp.test_vpp_acl_future_api] ERROR: test_jvpp.TestJVpp.test_vpp_core_callback_api [test_jvpp.TestJVpp.test_vpp_core_callback_api] ERROR: test_jvpp.TestJVpp.test_vpp_core_future_api [test_jvpp.TestJVpp.test_vpp_core_future_api] ERROR: test_jvpp.TestJVpp.test_vpp_ioamexport_callback_api [test_jvpp.TestJVpp.test_vpp_ioamexport_callback_api] ERROR: test_jvpp.TestJVpp.test_vpp_ioamexport_future_api [test_jvpp.TestJVpp.test_vpp_ioamexport_future_api] ERROR: test_jvpp.TestJVpp.test_vpp_ioampot_callback_api [test_jvpp.TestJVpp.test_vpp_ioampot_callback_api] ERROR: test_jvpp.TestJVpp.test_vpp_ioampot_future_api [test_jvpp.TestJVpp.test_vpp_ioampot_future_api] ERROR: test_jvpp.TestJVpp.test_vpp_ioamtrace_callback_api [test_jvpp.TestJVpp.test_vpp_ioamtrace_callback_api] ERROR: test_jvpp.TestJVpp.test_vpp_ioamtrace_future_api [test_jvpp.TestJVpp.test_vpp_ioamtrace_future_api] ERROR: test_jvpp.TestJVpp.test_vpp_snat_callback_api [test_jvpp.TestJVpp.test_vpp_snat_callback_api] ERROR: test_jvpp.TestJVpp.test_vpp_snat_future_api [test_jvpp.TestJVpp.test_vpp_snat_future_api] Testcase name: LDP Cut Thru Tests FAILURE: test_vcl.LDPCutThruTestCase.test_ldp_cut_thru_iperf3 [test_vcl.LDPCutThruTestCase.test_ldp_cut_thru_iperf3] Testcase name: ACL plugin connection-oriented extended testcases ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_0000_conn_prepare_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_0000_conn_prepare_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_0001_basic_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_0001_basic_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_0002_basic_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_0002_basic_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_0005_clear_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_0005_clear_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_0006_clear_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_0006_clear_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_0011_active_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_0011_active_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_0012_active_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_0012_active_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_1001_basic_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_1001_basic_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_1002_basic_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_1002_basic_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_1005_clear_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_1005_clear_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_1006_clear_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_1006_clear_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_1011_active_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_1011_active_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_1012_active_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_1012_active_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_2000_prepare_for_tcp_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_2000_prepare_for_tcp_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_2001_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_2001_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_2002_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_2002_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_2003_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_2003_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_2004_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_2004_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_2005_tcp_transient_teardown_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_2005_tcp_transient_teardown_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_2006_tcp_transient_teardown_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_2006_tcp_transient_teardown_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_3001_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_3001_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_3002_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_3002_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_3003_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_3003_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_3004_tcp_transient_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_3004_tcp_transient_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_3005_tcp_transient_teardown_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_3005_tcp_transient_teardown_conn_test] ERROR: test_acl_plugin_conns.ACLPluginConnTestCase.test_3006_tcp_transient_teardown_conn_test [test_acl_plugin_conns.ACLPluginConnTestCase.test_3006_tcp_transient_teardown_conn_test] Testcase name: LDP Thru Host Stack Echo FAILURE: test_vcl.LDPThruHostStackEcho.test_ldp_thru_host_stack_echo [test_vcl.LDPThruHostStackEcho.test_ldp_thru_host_stack_echo] Testcase name: Bidirectional Forwarding Detection (BFD) - API ERROR: test_bfd.BFDAPITestCase.test_activate_auth [test_bfd.BFDAPITestCase.test_activate_auth] ERROR: test_bfd.BFDAPITestCase.test_add_auth_nonexistent_key [test_bfd.BFDAPITestCase.test_add_auth_nonexistent_key] ERROR: test_bfd.BFDAPITestCase.test_add_bfd [test_bfd.BFDAPITestCase.test_add_bfd] ERROR: test_bfd.BFDAPITestCase.test_add_bfd6 [test_bfd.BFDAPITestCase.test_add_bfd6] ERROR: test_bfd.BFDAPITestCase.test_add_bfd_sha1 [test_bfd.BFDAPITestCase.test_add_bfd_sha1] ERROR: test_bfd.BFDAPITestCase.test_add_sha1_keys [test_bfd.BFDAPITestCase.test_add_sha1_keys] ERROR: test_bfd.BFDAPITestCase.test_change_key [test_bfd.BFDAPITestCase.test_change_key] ERROR: test_bfd.BFDAPITestCase.test_deactivate_auth [test_bfd.BFDAPITestCase.test_deactivate_auth] ERROR: test_bfd.BFDAPITestCase.test_double_add [test_bfd.BFDAPITestCase.test_double_add] ERROR: test_bfd.BFDAPITestCase.test_double_add_sha1 [test_bfd.BFDAPITestCase.test_double_add_sha1] ERROR: test_bfd.BFDAPITestCase.test_mod_bfd [test_bfd.BFDAPITestCase.test_mod_bfd] ERROR: test_bfd.BFDAPITestCase.test_set_del_udp_echo_source [test_bfd.BFDAPITestCase.test_set_del_udp_echo_source] ERROR: test_bfd.BFDAPITestCase.test_shared_sha1_key [test_bfd.BFDAPITestCase.test_shared_sha1_key] Testcase name: LDP Thru Host Stack Iperf FAILURE: test_vcl.LDPThruHostStackIperf.test_ldp_thru_host_stack_iperf3 [test_vcl.LDPThruHostStackIperf.test_ldp_thru_host_stack_iperf3] Testcase name: Bidirectional Forwarding Detection (BFD) (SHA1 auth) ERROR: test_bfd.BFDSHA1TestCase.test_session_up [test_bfd.BFDSHA1TestCase.test_session_up] Testcase name: Punt Socket for IPv6 ERROR: test_punt.TestIP6PuntSocket.test_punt_socket_dump [test_punt.TestIP6PuntSocket.test_punt_socket_dump] ERROR: test_punt.TestIP6PuntSocket.test_punt_socket_traffic_multi_port_multi_sockets [test_punt.TestIP6PuntSocket.test_punt_socket_traffic_multi_port_multi_sockets] ERROR: test_punt.TestIP6PuntSocket.test_punt_socket_traffic_multi_ports_single_socket [test_punt.TestIP6PuntSocket.test_punt_socket_traffic_multi_ports_single_socket] ERROR: test_punt.TestIP6PuntSocket.test_punt_socket_traffic_single_port_single_socket [test_punt.TestIP6PuntSocket.test_punt_socket_traffic_single_port_single_socket] Testcase name: Disable Flowprobe feature ERROR: test_flowprobe.DisableFP.test_0001 [test_flowprobe.DisableFP.test_0001] Testcase name: Disable IPFIX ERROR: test_flowprobe.DisableIPFIX.test_0001 [test_flowprobe.DisableIPFIX.test_0001] Testcase name: VPP Object Model Test ERROR: test_vom.VOMTestCase.test_vom_cpp [test_vom.VOMTestCase.test_vom_cpp] Testcase name: BFD-FIB interactions (IPv6) ERROR: test_bfd.BFDFIBTestCase.test_session_with_fib [test_bfd.BFDFIBTestCase.test_session_with_fib] Testcase name: Bidirectional Forwarding Detection (BFD) ERROR: test_bfd.BFD4TestCase.test_echo [test_bfd.BFD4TestCase.test_echo] ERROR: test_bfd.BFD4TestCase.test_echo_looped_back [test_bfd.BFD4TestCase.test_echo_looped_back] ERROR: test_bfd.BFD4TestCase.test_intf_deleted [test_bfd.BFD4TestCase.test_intf_deleted] ERROR: test_bfd.BFD4TestCase.test_session_down [test_bfd.BFD4TestCase.test_session_down] ERROR: test_bfd.BFD4TestCase.test_session_up [test_bfd.BFD4TestCase.test_session_up] ERROR: test_bfd.BFD4TestCase.test_session_up_by_ip [test_bfd.BFD4TestCase.test_session_up_by_ip] Testcase name: VXLAN-GPE Test Case ERROR: test_vxlan_gpe.TestVxlanGpe.test_decap [test_vxlan_gpe.TestVxlanGpe.test_decap] ERROR: test_vxlan_gpe.TestVxlanGpe.test_encap [test_vxlan_gpe.TestVxlanGpe.test_encap] ERROR: test_vxlan_gpe.TestVxlanGpe.test_ucast_flood [test_vxlan_gpe.TestVxlanGpe.test_ucast_flood] Testcase name: Re-enable Flowprobe feature ERROR: test_flowprobe.ReenableFP.test_0001 [test_flowprobe.ReenableFP.test_0001] Testcase name: LDP IPv6 Cut Thru Tests FAILURE: test_vcl.LDPIpv6CutThruTestCase.test_ldp_ipv6_cut_thru_echo [test_vcl.LDPIpv6CutThruTestCase.test_ldp_ipv6_cut_thru_echo] TESTCASES WHERE NO TESTS WERE SUCCESSFULLY EXECUTED: VXLAN over IPv6 Test Case ============================================================================== 0 attempt(s) left. Change-Id: Id202ed6ee7f57670f34ec87380244c568b509416 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2018-12-20Tests: Cleanup @skip decorator.Paul Vinciguerra1-35/+35
The runnning environment is static as of module load time, so only evalute the conditions once at module load time. Track-by: VPP-1518 Change-Id: I73b0d17ae1ff90789e70307f168d43921829aec8 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2018-11-27VPP-1508 Fix for bug introduced in tests on use of repr.Paul Vinciguerra1-2/+2
This fixes the change from https://gerrit.fd.io/r/#/c/16175/ ... ====== Totals ====== Ran: 856 tests in 2123.0000 sec. - Passed: 667 - Skipped: 157 - Expected Fail: 0 - Unexpected Success: 0 - Failed: 32 Sum of execute time for each test: 1641.0832 sec. ============== Worker Balance ============== - Worker 0 (416 tests) => 0:35:06.788054 - Worker 1 (440 tests) => 0:31:13.814911 Test id Runtime (s) -------------------------------------------------------------------------------------- ----------- test.test_vcl.VCLCutThruTestCase.test_ldp_cut_thru_bi_dir_nsock 120.382 test.test_vcl.VCLThruHostStackGroupBTestCase.test_ldp_thru_host_stack_bi_dir_nsock 60.368 test.test_vcl.VCLIpv6ThruHostStackGroupBTestCase.test_ldp_thru_host_stack_bi_dir_nsock 60.356 test.test_igmp.TestIgmp.test_igmp_host 47.411 test.test_reassembly.TestFIFReassembly.test_fif6 38.561 test.test_reassembly.TestFIFReassembly.test_fif4 37.045 test.test_gbp.TestGBP.test_gbp 30.041 test.test_dhcp.TestDHCP.test_dhcp_proxy 29.339 test.test_vcl.VCLCutThruTestCase.test_ldp_cut_thru_iperf3 20.489 test.test_neighbor.ARPTestCase.test_arp 19.004 Change-Id: Ic1565f14962f157d5041230de3aeeab0b85f21e1 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2018-11-25VPP-1508 python3 tests: python3 repr.Paul Vinciguerra1-9/+13
Use six.reprlib. Uses repr for python 2 and reprlib for python 3. Change-Id: Ia343a492d533bd511ed57166381e10a37e452d36 Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
2018-11-08make test: bfd refactorKlement Sekera1-1/+1
Change-Id: I14a126521d8c8138904c8b9da05d4144c72c51a5 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2018-10-02BFD: add get echo source API (VPP-1367)Matus Fabian1-0/+45
Change-Id: I45f540128e038ddb17ba96ce30965e8f7c732067 Signed-off-by: Matus Fabian <matfabia@cisco.com>
2018-09-11GBP Endpoint UpdatesNeale Ranns1-1/+2
- common types on the API - endpoints keyed in various ways for DP lookup - conparison functions for VPP IP address types Change-Id: If7ec0bbc5cea71fd0983fe78987d147ec1bd7ec8 Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
2018-06-25make test: fix broken interfaces #2Klement Sekera1-2/+2
Change-Id: I9d5b5d925fd2c09a1113fc51e433a16d729a241b Signed-off-by: Klement Sekera <ksekera@cisco.com>
2018-06-24Revert "Revert "make test: fix broken interfaces""Klement Sekera1-3/+3
This reverts commit c8efa29b6f9a91381897b54f1147daf922ed7164. Change-Id: I1d5c5773d5f86a63073e255336bd9de628e26179 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2018-06-22Revert "make test: fix broken interfaces"Ole Troan1-3/+3
This reverts commit d5c60b96a3fd93916fc4af5c8d6d25625c28242e. Change-Id: I3632b9c3f76c615aee897f28f76d094e7031e689 Signed-off-by: Ole Troan <ot@cisco.com>
2018-06-22make test: fix broken interfacesKlement Sekera1-3/+3
Change-Id: I2e092774f81503e04b53cc6c6b5d357fe3fc52ab Signed-off-by: Klement Sekera <ksekera@cisco.com>
2018-04-17Add logging supportDamjan Marion1-2/+6
Change-Id: Ieac9cf50156dbbb4962411e900d59256441915ef Signed-off-by: Damjan Marion <damarion@cisco.com> Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-10-21test bfd - DPO_PROTO_IP6 is part of DpoProtoGabriel Ganne1-2/+2
Change-Id: I63d336a1ba366a60a2a8f1124e3f37f742cccb65 Signed-off-by: Gabriel Ganne <gabriel.ganne@enea.com>
2017-08-08L2 over MPLSNeale Ranns1-3/+3
[support for VPWS/VPLS] - switch to using dpo_proto_t rather than fib_protocol_t in fib_paths so that we can describe L2 paths - VLIB nodes to handle pop/push of MPLS labels to L2 Change-Id: Id050d06a11fd2c9c1c81ce5a0654e6c5ae6afa6e Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-05-02BFD: don't crash if interface is deletedKlement Sekera1-0/+30
Instead, drop the BFD session associated with it.. Change-Id: Ie09877d5c94844be2e833900d9dde7f23edaf8cd Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-04-24make test: mark all BFD tests as extendedKlement Sekera1-0/+5
Change-Id: Iaed59cca1c9fd69eadb86c15be6417a956cb9d5a Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-04-20make test: improve bfd reliabilityKlement Sekera1-18/+30
Change-Id: Iaf446a2d7d8e595c3379fb9ed61a954351c17b90 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-04-06BFD-FIB interactionsNeale Ranns1-1/+103
- single-hop BFD: attach a delegate to the appropriate adjacency - multi-hop BFD [not supported yet]: attach a delegate to the FIB entry. adjacency/fib_entry state tracks the BFD session state. when the state is down the object does not contribute forwarding hence and hence dependent objects will not use it. For example, if a route is ECMP via two adjacencies and one of them is BFD down, then only the other is used to forward (i.e. we don't drop half the traffic). Change-Id: I0ef53e20e73b067001a132cd0a3045408811a822 Signed-off-by: Neale Ranns <nranns@cisco.com>
2017-04-03make test: relax BFD time intervalsKlement Sekera1-7/+9
Increased time intervals mean longer test runs, but also reduce the chance of getting annoying (especially in gerrit) random failures. Now that tests are split into `basic' and `all', the increased runtime of BFD tests (of which majority doesn't run in basic case) doesn't matter too much.. Change-Id: I4a15bb4facad634f123bc9cc6f45eddbf4976fd1 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-03-13Add MAC address check in ethernet-input node if interface in L3 modeJohn Lo1-1/+10
Interface can be in promiscuous mode if more than one of its sub- interface is in L2 mode. In promiscuous mode, L3 interface need to verify DMAC of packet to match that of the interface and drop if not. This check was done on sub-interface only and now also added to main interface path. Fix incorrect MAC addresses in the flow-per-pkt plugin test, which caused it to fail. Fix MAC address usage in BFD tests. Change-Id: I12a17ec05c7ab298ad10d400c90d082c97eca521 Signed-off-by: John Lo <loj@cisco.com> Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-03-08make test: split into basic and extended testsKlement Sekera1-2/+33
Implement plumbing to allow decorating tests as extended, e.g.: @unittest.skipUnless(running_extended_tests(), "part of extended tests") both methods and classes can be decorated this way. Change make test and make test-debug to run only non-extended tests. Introduce make test-all and make test-all-debug to run the full suite. Run full suite as part of make verify. Decorate most BFD tests as extended. Change-Id: I3bc64f59e9fe238f7f767d7e043dc165d03e9dfa Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-03-02BFD: command line interfaceKlement Sekera1-20/+559
Implement command line interface to the BFD binary APIs. Add corresponding unit tests. Change-Id: Ia0542d0bc4c8d78e6f7b777a08fd94ebfe4d524f Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-02-26BFD: echo functionKlement Sekera1-48/+429
Change-Id: Ib1e301d62b687d4e42434239e7cd412065c28da0 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-02-17BFD: put session admin-up/admin-downKlement Sekera1-8/+36
Change-Id: I7d8889dce8495607106593ad83320c9af0f2fa07 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-02-15BFD: loop back echo packetsKlement Sekera1-19/+103
Change-Id: I772b63ac25ebfccaff9ab9d8d0b1445e85f21df7 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-02-14BFD: respect remote demand modeKlement Sekera1-328/+509
Change-Id: I5063d31f5305c848043afb32fcacff6e61aed79f Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-02-08make test: BFD tests speedupKlement Sekera1-2/+4
Change-Id: I0b3064a311f28ebf7cd9db0a59cb04c7c25c9d58 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-02-08BFD: modify session parametersKlement Sekera1-13/+151
Change-Id: I666e5c0cc71a3693640960c93cdd1907f84fbe23 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-02-02BFD: SHA1 authenticationKlement Sekera1-37/+696
Add authentication support to BFD feature. Out of three existing authentication types, implement SHA1 (sole RFC requirement). Simple password is insecure and MD5 is discouraged by the RFC, so ignore those. Add/change APIs to allow configuring BFD authentication keys and their usage with BFD sessions. Change-Id: Ifb0fb5b19c2e72196d84c1cde919bd4c074ea415 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-01-25make test: elegantly handle expected API failuresKlement Sekera1-6/+3
Allow writing simple code to expect API failure when needed: with self.vapi.expect_negative_api_retval(): do_api_call() # expected to return negative retval in response Change-Id: Id58d91d9ce38d20ad6ff7a43a6897e79ffbd23bf Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-01-17BFD: IPv6 supportKlement Sekera1-79/+142
Change-Id: Iaa9538c7cca500c04cf2704e5bf87480543cfcdf Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-01-17make test: add checkstyle targetKlement Sekera1-2/+0
Change-Id: I59d3c3bc77474c96e1d6fa51811c1b13fb9a6c5b Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-01-11BFD: fix bfd_udp_add APIKlement Sekera1-8/+25
Fix reporting of bs_index in the return message. Enhance test suite to cover this case. Change-Id: I37d35b850818bc1a05abe67ca919c22aeac978b6 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2017-01-03BFD: immediately honor reduced remote_min_rx intervalKlement Sekera1-24/+62
Change-Id: I7f09b45c926557d2ad0e2706b38fa56ff8194a3d Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-23make test: improve handling of packet capturesKlement Sekera1-4/+4
Perform accounting of expected packets based on created packet infos. Use this accounting info to automatically expect (and verify) the correct number of packets to be captured. Automatically retry the read of the capture file if scapy raises an exception while doing so to handle rare cases when capture file is read while only partially written during busy wait. Don't fail assert_nothing_captured if only junk packets arrived. Change-Id: I16ec2e9410ef510d313ec16b7e13c57d0b2a63f5 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-19make test: work around timing issue in bfd testKlement Sekera1-1/+1
Change-Id: I3f70091950b9288670969e54eadd35ac733905e4 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-16make test: improve robustness and performanceKlement Sekera1-1/+1
Introduce an API which asserts empty capture for interface. Throw exception in old API if the capture does not exist, thus making it clear if the test expects packets to arrive or not. Improve performance by not doing sleeps after starting the packet generator, rather lazily deleting captures when needed. Fix wrong usage of packet.show() in various tests. Change-Id: I456cb23316eef99b3f35f80344fe595c4db9a21c Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-09BFD: handle timing wheel prematurely firing eventsKlement Sekera1-3/+3
Improve handling of timeouts. Add a workaround for when timing wheel fires an event a tiny amount of time before it should actually be fired. Don't delete unneeded events at all from timing wheel, instead ignoring unexpected events. Enable the skipped BFD test, which passes now. Change-Id: I6ffd4fc0ba7a049ffe63bb0e5290641a7300dd6f Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-09BFD: fix timing in the main loopKlement Sekera1-34/+35
Properly wakeup the main process loop only when necessary to avoid missed events. Improve BFD unit test reliability and speed. Add timestamps to logs and replace Queue with more efficient deque. Change-Id: I01255a02057d3146917b43b669ccdc74f31ef0c8 Signed-off-by: Klement Sekera <ksekera@cisco.com>
2016-12-08BFD: improve ip header handling, fix assertKlement Sekera1-0/+1
Instead of storing a pointer, store an offset within vlib_buffer marking the start of the ip header (similar to storing start of ethernet header). Handle negative timeout in the bfd process main loop. Change-Id: I05a1ff3ac41da5bdc3b2ac6f9e03b3241994688b Signed-off-by: Klement Sekera <ksekera@cisco.com>
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/*
 * Copyright (c) 2016 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.
 */
/*
 * ip/ip6_forward.c: IP v6 forwarding
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>	/* for ethernet_header_t */
#include <vnet/srp/srp.h>	/* for srp_hw_interface_class */
#include <vppinfra/cache.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/mfib/ip6_mfib.h>
#include <vnet/dpo/load_balance.h>
#include <vnet/dpo/classify_dpo.h>

#include <vppinfra/bihash_template.c>

/**
 * @file
 * @brief IPv6 Forwarding.
 *
 * This file contains the source code for IPv6 forwarding.
 */

void
ip6_forward_next_trace (vlib_main_t * vm,
			vlib_node_runtime_t * node,
			vlib_frame_t * frame,
			vlib_rx_or_tx_t which_adj_index);

always_inline uword
ip6_lookup_inline (vlib_main_t * vm,
		   vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  ip6_main_t *im = &ip6_main;
  vlib_combined_counter_main_t *cm = &load_balance_main.lbm_to_counters;
  u32 n_left_from, n_left_to_next, *from, *to_next;
  ip_lookup_next_t next;
  u32 cpu_index = os_get_cpu_number ();

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  next = node->cached_next_index;

  while (n_left_from > 0)
    {
      vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);

      while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	  vlib_buffer_t *p0, *p1;
	  u32 pi0, pi1, lbi0, lbi1, wrong_next;
	  ip_lookup_next_t next0, next1;
	  ip6_header_t *ip0, *ip1;
	  ip6_address_t *dst_addr0, *dst_addr1;
	  u32 fib_index0, fib_index1;
	  u32 flow_hash_config0, flow_hash_config1;
	  const dpo_id_t *dpo0, *dpo1;
	  const load_balance_t *lb0, *lb1;

	  /* Prefetch next iteration. */
	  {
	    vlib_buffer_t *p2, *p3;

	    p2 = vlib_get_buffer (vm, from[2]);
	    p3 = vlib_get_buffer (vm, from[3]);

	    vlib_prefetch_buffer_header (p2, LOAD);
	    vlib_prefetch_buffer_header (p3, LOAD);
	    CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
	    CLIB_PREFETCH (p3->data, sizeof (ip0[0]), LOAD);
	  }

	  pi0 = to_next[0] = from[0];
	  pi1 = to_next[1] = from[1];

	  p0 = vlib_get_buffer (vm, pi0);
	  p1 = vlib_get_buffer (vm, pi1);

	  ip0 = vlib_buffer_get_current (p0);
	  ip1 = vlib_buffer_get_current (p1);

	  dst_addr0 = &ip0->dst_address;
	  dst_addr1 = &ip1->dst_address;

	  fib_index0 =
	    vec_elt (im->fib_index_by_sw_if_index,
		     vnet_buffer (p0)->sw_if_index[VLIB_RX]);
	  fib_index1 =
	    vec_elt (im->fib_index_by_sw_if_index,
		     vnet_buffer (p1)->sw_if_index[VLIB_RX]);

	  fib_index0 = (vnet_buffer (p0)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
	    fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
	  fib_index1 = (vnet_buffer (p1)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
	    fib_index1 : vnet_buffer (p1)->sw_if_index[VLIB_TX];

	  lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
	  lbi1 = ip6_fib_table_fwding_lookup (im, fib_index1, dst_addr1);

	  lb0 = load_balance_get (lbi0);
	  lb1 = load_balance_get (lbi1);

	  vnet_buffer (p0)->ip.flow_hash = vnet_buffer (p1)->ip.flow_hash = 0;

	  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
	    {
	      flow_hash_config0 = lb0->lb_hash_config;
	      vnet_buffer (p0)->ip.flow_hash =
		ip6_compute_flow_hash (ip0, flow_hash_config0);
	    }
	  if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
	    {
	      flow_hash_config1 = lb1->lb_hash_config;
	      vnet_buffer (p1)->ip.flow_hash =
		ip6_compute_flow_hash (ip1, flow_hash_config1);
	    }

	  ASSERT (lb0->lb_n_buckets > 0);
	  ASSERT (lb1->lb_n_buckets > 0);
	  ASSERT (is_pow2 (lb0->lb_n_buckets));
	  ASSERT (is_pow2 (lb1->lb_n_buckets));
	  dpo0 = load_balance_get_bucket_i (lb0,
					    (vnet_buffer (p0)->ip.flow_hash &
					     lb0->lb_n_buckets_minus_1));
	  dpo1 = load_balance_get_bucket_i (lb1,
					    (vnet_buffer (p1)->ip.flow_hash &
					     lb1->lb_n_buckets_minus_1));

	  next0 = dpo0->dpoi_next_node;
	  next1 = dpo1->dpoi_next_node;

	  /* Only process the HBH Option Header if explicitly configured to do so */
	  if (PREDICT_FALSE
	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
	    }
	  if (PREDICT_FALSE
	      (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
	    }
	  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
	  vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;

	  vlib_increment_combined_counter
	    (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
	  vlib_increment_combined_counter
	    (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));

	  from += 2;
	  to_next += 2;
	  n_left_to_next -= 2;
	  n_left_from -= 2;

	  wrong_next = (next0 != next) + 2 * (next1 != next);
	  if (PREDICT_FALSE (wrong_next != 0))
	    {
	      switch (wrong_next)
		{
		case 1:
		  /* A B A */
		  to_next[-2] = pi1;
		  to_next -= 1;
		  n_left_to_next += 1;
		  vlib_set_next_frame_buffer (vm, node, next0, pi0);
		  break;

		case 2:
		  /* A A B */
		  to_next -= 1;
		  n_left_to_next += 1;
		  vlib_set_next_frame_buffer (vm, node, next1, pi1);
		  break;

		case 3:
		  /* A B C */
		  to_next -= 2;
		  n_left_to_next += 2;
		  vlib_set_next_frame_buffer (vm, node, next0, pi0);
		  vlib_set_next_frame_buffer (vm, node, next1, pi1);
		  if (next0 == next1)
		    {
		      /* A B B */
		      vlib_put_next_frame (vm, node, next, n_left_to_next);
		      next = next1;
		      vlib_get_next_frame (vm, node, next, to_next,
					   n_left_to_next);
		    }
		}
	    }
	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  vlib_buffer_t *p0;
	  ip6_header_t *ip0;
	  u32 pi0, lbi0;
	  ip_lookup_next_t next0;
	  load_balance_t *lb0;
	  ip6_address_t *dst_addr0;
	  u32 fib_index0, flow_hash_config0;
	  const dpo_id_t *dpo0;

	  pi0 = from[0];
	  to_next[0] = pi0;

	  p0 = vlib_get_buffer (vm, pi0);

	  ip0 = vlib_buffer_get_current (p0);

	  dst_addr0 = &ip0->dst_address;

	  fib_index0 =
	    vec_elt (im->fib_index_by_sw_if_index,
		     vnet_buffer (p0)->sw_if_index[VLIB_RX]);
	  fib_index0 =
	    (vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
	     (u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];

	  flow_hash_config0 = ip6_fib_get (fib_index0)->flow_hash_config;

	  lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);

	  lb0 = load_balance_get (lbi0);

	  vnet_buffer (p0)->ip.flow_hash = 0;

	  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
	    {
	      flow_hash_config0 = lb0->lb_hash_config;
	      vnet_buffer (p0)->ip.flow_hash =
		ip6_compute_flow_hash (ip0, flow_hash_config0);
	    }

	  ASSERT (lb0->lb_n_buckets > 0);
	  ASSERT (is_pow2 (lb0->lb_n_buckets));
	  dpo0 = load_balance_get_bucket_i (lb0,
					    (vnet_buffer (p0)->ip.flow_hash &
					     lb0->lb_n_buckets_minus_1));
	  next0 = dpo0->dpoi_next_node;

	  /* Only process the HBH Option Header if explicitly configured to do so */
	  if (PREDICT_FALSE
	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
	    }
	  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;

	  vlib_increment_combined_counter
	    (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));

	  from += 1;
	  to_next += 1;
	  n_left_to_next -= 1;
	  n_left_from -= 1;

	  if (PREDICT_FALSE (next0 != next))
	    {
	      n_left_to_next += 1;
	      vlib_put_next_frame (vm, node, next, n_left_to_next);
	      next = next0;
	      vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);
	      to_next[0] = pi0;
	      to_next += 1;
	      n_left_to_next -= 1;
	    }
	}

      vlib_put_next_frame (vm, node, next, n_left_to_next);
    }

  if (node->flags & VLIB_NODE_FLAG_TRACE)
    ip6_forward_next_trace (vm, node, frame, VLIB_TX);

  return frame->n_vectors;
}

static void
ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
			  ip6_main_t * im, u32 fib_index,
			  ip_interface_address_t * a)
{
  ip_lookup_main_t *lm = &im->lookup_main;
  ip6_address_t *address = ip_interface_address_get_address (lm, a);
  fib_prefix_t pfx = {
    .fp_len = a->address_length,
    .fp_proto = FIB_PROTOCOL_IP6,
    .fp_addr.ip6 = *address,
  };

  a->neighbor_probe_adj_index = ~0;
  if (a->address_length < 128)
    {
      fib_node_index_t fei;

      fei = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_ATTACHED), FIB_PROTOCOL_IP6, NULL,	/* No next-hop address */
					     sw_if_index, ~0,	// invalid FIB index
					     1, NULL,	// no label stack
					     FIB_ROUTE_PATH_FLAG_NONE);
      a->neighbor_probe_adj_index = fib_entry_get_adj (fei);
    }

  pfx.fp_len = 128;
  if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
    {
      u32 classify_table_index =
	lm->classify_table_index_by_sw_if_index[sw_if_index];
      if (classify_table_index != (u32) ~ 0)
	{
	  dpo_id_t dpo = DPO_INVALID;

	  dpo_set (&dpo,
		   DPO_CLASSIFY,
		   DPO_PROTO_IP6,
		   classify_dpo_create (DPO_PROTO_IP6, classify_table_index));

	  fib_table_entry_special_dpo_add (fib_index,
					   &pfx,
					   FIB_SOURCE_CLASSIFY,
					   FIB_ENTRY_FLAG_NONE, &dpo);
	  dpo_reset (&dpo);
	}
    }

  fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_INTERFACE, (FIB_ENTRY_FLAG_CONNECTED | FIB_ENTRY_FLAG_LOCAL), FIB_PROTOCOL_IP6, &pfx.fp_addr, sw_if_index, ~0,	// invalid FIB index
				   1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
}

static void
ip6_del_interface_routes (ip6_main_t * im,
			  u32 fib_index,
			  ip6_address_t * address, u32 address_length)
{
  fib_prefix_t pfx = {
    .fp_len = address_length,
    .fp_proto = FIB_PROTOCOL_IP6,
    .fp_addr.ip6 = *address,
  };

  if (pfx.fp_len < 128)
    {
      fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);

    }

  pfx.fp_len = 128;
  fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
}

void
ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
{
  ip6_main_t *im = &ip6_main;

  vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);

  /*
   * enable/disable only on the 1<->0 transition
   */
  if (is_enable)
    {
      if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
	return;
    }
  else
    {
      /* The ref count is 0 when an address is removed from an interface that has
       * no address - this is not a ciritical error */
      if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
	  0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
	return;
    }

  if (sw_if_index != 0)
    ip6_mfib_interface_enable_disable (sw_if_index, is_enable);

  vnet_feature_enable_disable ("ip6-unicast", "ip6-lookup", sw_if_index,
			       is_enable, 0, 0);

  vnet_feature_enable_disable ("ip6-multicast", "ip6-mfib-forward-lookup",
			       sw_if_index, is_enable, 0, 0);

}

/* get first interface address */
ip6_address_t *
ip6_interface_first_address (ip6_main_t * im,
			     u32 sw_if_index,
			     ip_interface_address_t ** result_ia)
{
  ip_lookup_main_t *lm = &im->lookup_main;
  ip_interface_address_t *ia = 0;
  ip6_address_t *result = 0;

  /* *INDENT-OFF* */
  foreach_ip_interface_address (lm, ia, sw_if_index,
                                1 /* honor unnumbered */,
  ({
    ip6_address_t * a = ip_interface_address_get_address (lm, ia);
    result = a;
    break;
  }));
  /* *INDENT-ON* */
  if (result_ia)
    *result_ia = result ? ia : 0;
  return result;
}

clib_error_t *
ip6_add_del_interface_address (vlib_main_t * vm,
			       u32 sw_if_index,
			       ip6_address_t * address,
			       u32 address_length, u32 is_del)
{
  vnet_main_t *vnm = vnet_get_main ();
  ip6_main_t *im = &ip6_main;
  ip_lookup_main_t *lm = &im->lookup_main;
  clib_error_t *error;
  u32 if_address_index;
  ip6_address_fib_t ip6_af, *addr_fib = 0;

  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
  vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);

  ip6_addr_fib_init (&ip6_af, address,
		     vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
  vec_add1 (addr_fib, ip6_af);

  {
    uword elts_before = pool_elts (lm->if_address_pool);

    error = ip_interface_address_add_del
      (lm, sw_if_index, addr_fib, address_length, is_del, &if_address_index);
    if (error)
      goto done;

    /* Pool did not grow: add duplicate address. */
    if (elts_before == pool_elts (lm->if_address_pool))
      goto done;
  }

  ip6_sw_interface_enable_disable (sw_if_index, !is_del);

  if (is_del)
    ip6_del_interface_routes (im, ip6_af.fib_index, address, address_length);
  else
    ip6_add_interface_routes (vnm, sw_if_index,
			      im, ip6_af.fib_index,
			      pool_elt_at_index (lm->if_address_pool,
						 if_address_index));

  {
    ip6_add_del_interface_address_callback_t *cb;
    vec_foreach (cb, im->add_del_interface_address_callbacks)
      cb->function (im, cb->function_opaque, sw_if_index,
		    address, address_length, if_address_index, is_del);
  }

done:
  vec_free (addr_fib);
  return error;
}

clib_error_t *
ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
{
  ip6_main_t *im = &ip6_main;
  ip_interface_address_t *ia;
  ip6_address_t *a;
  u32 is_admin_up, fib_index;

  /* Fill in lookup tables with default table (0). */
  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);

  vec_validate_init_empty (im->
			   lookup_main.if_address_pool_index_by_sw_if_index,
			   sw_if_index, ~0);

  is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;

  fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);

  /* *INDENT-OFF* */
  foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
                                0 /* honor unnumbered */,
  ({
    a = ip_interface_address_get_address (&im->lookup_main, ia);
    if (is_admin_up)
      ip6_add_interface_routes (vnm, sw_if_index,
				im, fib_index,
				ia);
    else
      ip6_del_interface_routes (im, fib_index,
				a, ia->address_length);
  }));
  /* *INDENT-ON* */

  return 0;
}

VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);

/* Built-in ip6 unicast rx feature path definition */
/* *INDENT-OFF* */
VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
{
  .arc_name  = "ip6-unicast",
  .start_nodes = VNET_FEATURES ("ip6-input"),
  .arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
};

VNET_FEATURE_INIT (ip6_flow_classify, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "ip6-flow-classify",
  .runs_before = VNET_FEATURES ("ip6-inacl"),
};

VNET_FEATURE_INIT (ip6_inacl, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "ip6-inacl",
  .runs_before = VNET_FEATURES ("ip6-policer-classify"),
};

VNET_FEATURE_INIT (ip6_policer_classify, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "ip6-policer-classify",
  .runs_before = VNET_FEATURES ("ipsec-input-ip6"),
};

VNET_FEATURE_INIT (ip6_ipsec, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "ipsec-input-ip6",
  .runs_before = VNET_FEATURES ("l2tp-decap"),
};

VNET_FEATURE_INIT (ip6_l2tp, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "l2tp-decap",
  .runs_before = VNET_FEATURES ("vpath-input-ip6"),
};

VNET_FEATURE_INIT (ip6_vpath, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "vpath-input-ip6",
  .runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
};

VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "ip6-vxlan-bypass",
  .runs_before = VNET_FEATURES ("ip6-lookup"),
};

VNET_FEATURE_INIT (ip6_lookup, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "ip6-lookup",
  .runs_before = VNET_FEATURES ("ip6-drop"),
};

VNET_FEATURE_INIT (ip6_drop, static) =
{
  .arc_name = "ip6-unicast",
  .node_name = "ip6-drop",
  .runs_before = 0,  /*last feature*/
};

/* Built-in ip6 multicast rx feature path definition (none now) */
VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
{
  .arc_name  = "ip6-multicast",
  .start_nodes = VNET_FEATURES ("ip6-input"),
  .arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
};

VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
  .arc_name = "ip6-multicast",
  .node_name = "vpath-input-ip6",
  .runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
};

VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
  .arc_name = "ip6-multicast",
  .node_name = "ip6-mfib-forward-lookup",
  .runs_before = VNET_FEATURES ("ip6-drop"),
};

VNET_FEATURE_INIT (ip6_drop_mc, static) = {
  .arc_name = "ip6-multicast",
  .node_name = "ip6-drop",
  .runs_before = 0, /* last feature */
};

/* Built-in ip4 tx feature path definition */
VNET_FEATURE_ARC_INIT (ip6_output, static) =
{
  .arc_name  = "ip6-output",
  .start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain"),
  .arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
};

VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
  .arc_name = "ip6-output",
  .node_name = "ipsec-output-ip6",
  .runs_before = VNET_FEATURES ("interface-output"),
};

VNET_FEATURE_INIT (ip6_interface_output, static) = {
  .arc_name = "ip6-output",
  .node_name = "interface-output",
  .runs_before = 0, /* not before any other features */
};
/* *INDENT-ON* */

clib_error_t *
ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
{
  vnet_feature_enable_disable ("ip6-unicast", "ip6-drop", sw_if_index,
			       is_add, 0, 0);

  vnet_feature_enable_disable ("ip6-multicast", "ip6-drop", sw_if_index,
			       is_add, 0, 0);

  vnet_feature_enable_disable ("ip6-output", "interface-output", sw_if_index,
			       is_add, 0, 0);

  return /* no error */ 0;
}

VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);

static uword
ip6_lookup (vlib_main_t * vm,
	    vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip6_lookup_inline (vm, node, frame);
}

static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_lookup_node) =
{
  .function = ip6_lookup,
  .name = "ip6-lookup",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_lookup_trace,
  .n_next_nodes = IP6_LOOKUP_N_NEXT,
  .next_nodes = IP6_LOOKUP_NEXT_NODES,
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_lookup_node, ip6_lookup);

always_inline uword
ip6_load_balance (vlib_main_t * vm,
		  vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
  u32 n_left_from, n_left_to_next, *from, *to_next;
  ip_lookup_next_t next;
  u32 cpu_index = os_get_cpu_number ();
  ip6_main_t *im = &ip6_main;

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  next = node->cached_next_index;

  if (node->flags & VLIB_NODE_FLAG_TRACE)
    ip6_forward_next_trace (vm, node, frame, VLIB_TX);

  while (n_left_from > 0)
    {
      vlib_get_next_frame (vm, node, next, to_next, n_left_to_next);


      while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	  ip_lookup_next_t next0, next1;
	  const load_balance_t *lb0, *lb1;
	  vlib_buffer_t *p0, *p1;
	  u32 pi0, lbi0, hc0, pi1, lbi1, hc1;
	  const ip6_header_t *ip0, *ip1;
	  const dpo_id_t *dpo0, *dpo1;

	  /* Prefetch next iteration. */
	  {
	    vlib_buffer_t *p2, *p3;

	    p2 = vlib_get_buffer (vm, from[2]);
	    p3 = vlib_get_buffer (vm, from[3]);

	    vlib_prefetch_buffer_header (p2, STORE);
	    vlib_prefetch_buffer_header (p3, STORE);

	    CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
	    CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
	  }

	  pi0 = to_next[0] = from[0];
	  pi1 = to_next[1] = from[1];

	  from += 2;
	  n_left_from -= 2;
	  to_next += 2;
	  n_left_to_next -= 2;

	  p0 = vlib_get_buffer (vm, pi0);
	  p1 = vlib_get_buffer (vm, pi1);

	  ip0 = vlib_buffer_get_current (p0);
	  ip1 = vlib_buffer_get_current (p1);
	  lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
	  lbi1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];

	  lb0 = load_balance_get (lbi0);
	  lb1 = load_balance_get (lbi1);

	  /*
	   * this node is for via FIBs we can re-use the hash value from the
	   * to node if present.
	   * We don't want to use the same hash value at each level in the recursion
	   * graph as that would lead to polarisation
	   */
	  hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
	  hc1 = vnet_buffer (p1)->ip.flow_hash = 0;

	  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
	    {
	      if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
		{
		  hc0 = vnet_buffer (p0)->ip.flow_hash =
		    vnet_buffer (p0)->ip.flow_hash >> 1;
		}
	      else
		{
		  hc0 = vnet_buffer (p0)->ip.flow_hash =
		    ip6_compute_flow_hash (ip0, hc0);
		}
	    }
	  if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
	    {
	      if (PREDICT_TRUE (vnet_buffer (p1)->ip.flow_hash))
		{
		  hc1 = vnet_buffer (p1)->ip.flow_hash =
		    vnet_buffer (p1)->ip.flow_hash >> 1;
		}
	      else
		{
		  hc1 = vnet_buffer (p1)->ip.flow_hash =
		    ip6_compute_flow_hash (ip1, hc1);
		}
	    }

	  dpo0 =
	    load_balance_get_bucket_i (lb0,
				       hc0 & (lb0->lb_n_buckets_minus_1));
	  dpo1 =
	    load_balance_get_bucket_i (lb1,
				       hc1 & (lb1->lb_n_buckets_minus_1));

	  next0 = dpo0->dpoi_next_node;
	  next1 = dpo1->dpoi_next_node;

	  /* Only process the HBH Option Header if explicitly configured to do so */
	  if (PREDICT_FALSE
	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
	    }
	  /* Only process the HBH Option Header if explicitly configured to do so */
	  if (PREDICT_FALSE
	      (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      next1 = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next1;
	    }

	  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
	  vnet_buffer (p1)->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;

	  vlib_increment_combined_counter
	    (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));
	  vlib_increment_combined_counter
	    (cm, cpu_index, lbi1, 1, vlib_buffer_length_in_chain (vm, p1));

	  vlib_validate_buffer_enqueue_x2 (vm, node, next,
					   to_next, n_left_to_next,
					   pi0, pi1, next0, next1);
	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  ip_lookup_next_t next0;
	  const load_balance_t *lb0;
	  vlib_buffer_t *p0;
	  u32 pi0, lbi0, hc0;
	  const ip6_header_t *ip0;
	  const dpo_id_t *dpo0;

	  pi0 = from[0];
	  to_next[0] = pi0;
	  from += 1;
	  to_next += 1;
	  n_left_to_next -= 1;
	  n_left_from -= 1;

	  p0 = vlib_get_buffer (vm, pi0);

	  ip0 = vlib_buffer_get_current (p0);
	  lbi0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];

	  lb0 = load_balance_get (lbi0);

	  hc0 = vnet_buffer (p0)->ip.flow_hash = 0;
	  if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
	    {
	      if (PREDICT_TRUE (vnet_buffer (p0)->ip.flow_hash))
		{
		  hc0 = vnet_buffer (p0)->ip.flow_hash =
		    vnet_buffer (p0)->ip.flow_hash >> 1;
		}
	      else
		{
		  hc0 = vnet_buffer (p0)->ip.flow_hash =
		    ip6_compute_flow_hash (ip0, hc0);
		}
	    }
	  dpo0 =
	    load_balance_get_bucket_i (lb0,
				       hc0 & (lb0->lb_n_buckets_minus_1));

	  next0 = dpo0->dpoi_next_node;
	  vnet_buffer (p0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;

	  /* Only process the HBH Option Header if explicitly configured to do so */
	  if (PREDICT_FALSE
	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      next0 = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
		(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next0;
	    }

	  vlib_increment_combined_counter
	    (cm, cpu_index, lbi0, 1, vlib_buffer_length_in_chain (vm, p0));

	  vlib_validate_buffer_enqueue_x1 (vm, node, next,
					   to_next, n_left_to_next,
					   pi0, next0);
	}

      vlib_put_next_frame (vm, node, next, n_left_to_next);
    }

  return frame->n_vectors;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_load_balance_node) =
{
  .function = ip6_load_balance,
  .name = "ip6-load-balance",
  .vector_size = sizeof (u32),
  .sibling_of = "ip6-lookup",
  .format_trace = format_ip6_lookup_trace,
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_load_balance_node, ip6_load_balance);

typedef struct
{
  /* Adjacency taken. */
  u32 adj_index;
  u32 flow_hash;
  u32 fib_index;

  /* Packet data, possibly *after* rewrite. */
  u8 packet_data[128 - 1 * sizeof (u32)];
}
ip6_forward_next_trace_t;

u8 *
format_ip6_forward_next_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
  uword indent = format_get_indent (s);

  s = format (s, "%U%U",
	      format_white_space, indent,
	      format_ip6_header, t->packet_data, sizeof (t->packet_data));
  return s;
}

static u8 *
format_ip6_lookup_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
  uword indent = format_get_indent (s);

  s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
	      t->fib_index, t->adj_index, t->flow_hash);
  s = format (s, "\n%U%U",
	      format_white_space, indent,
	      format_ip6_header, t->packet_data, sizeof (t->packet_data));
  return s;
}


static u8 *
format_ip6_rewrite_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
  vnet_main_t *vnm = vnet_get_main ();
  uword indent = format_get_indent (s);

  s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
	      t->fib_index, t->adj_index, format_ip_adjacency,
	      t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
  s = format (s, "\n%U%U",
	      format_white_space, indent,
	      format_ip_adjacency_packet_data,
	      vnm, t->adj_index, t->packet_data, sizeof (t->packet_data));
  return s;
}

/* Common trace function for all ip6-forward next nodes. */
void
ip6_forward_next_trace (vlib_main_t * vm,
			vlib_node_runtime_t * node,
			vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
{
  u32 *from, n_left;
  ip6_main_t *im = &ip6_main;

  n_left = frame->n_vectors;
  from = vlib_frame_vector_args (frame);

  while (n_left >= 4)
    {
      u32 bi0, bi1;
      vlib_buffer_t *b0, *b1;
      ip6_forward_next_trace_t *t0, *t1;

      /* Prefetch next iteration. */
      vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
      vlib_prefetch_buffer_with_index (vm, from[3], LOAD);

      bi0 = from[0];
      bi1 = from[1];

      b0 = vlib_get_buffer (vm, bi0);
      b1 = vlib_get_buffer (vm, bi1);

      if (b0->flags & VLIB_BUFFER_IS_TRACED)
	{
	  t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
	  t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
	  t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
	  t0->fib_index =
	    (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
	     (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
	    vec_elt (im->fib_index_by_sw_if_index,
		     vnet_buffer (b0)->sw_if_index[VLIB_RX]);

	  clib_memcpy (t0->packet_data,
		       vlib_buffer_get_current (b0),
		       sizeof (t0->packet_data));
	}
      if (b1->flags & VLIB_BUFFER_IS_TRACED)
	{
	  t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
	  t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
	  t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
	  t1->fib_index =
	    (vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
	     (u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
	    vec_elt (im->fib_index_by_sw_if_index,
		     vnet_buffer (b1)->sw_if_index[VLIB_RX]);

	  clib_memcpy (t1->packet_data,
		       vlib_buffer_get_current (b1),
		       sizeof (t1->packet_data));
	}
      from += 2;
      n_left -= 2;
    }

  while (n_left >= 1)
    {
      u32 bi0;
      vlib_buffer_t *b0;
      ip6_forward_next_trace_t *t0;

      bi0 = from[0];

      b0 = vlib_get_buffer (vm, bi0);

      if (b0->flags & VLIB_BUFFER_IS_TRACED)
	{
	  t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
	  t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
	  t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
	  t0->fib_index =
	    (vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
	     (u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
	    vec_elt (im->fib_index_by_sw_if_index,
		     vnet_buffer (b0)->sw_if_index[VLIB_RX]);

	  clib_memcpy (t0->packet_data,
		       vlib_buffer_get_current (b0),
		       sizeof (t0->packet_data));
	}
      from += 1;
      n_left -= 1;
    }
}

static uword
ip6_drop_or_punt (vlib_main_t * vm,
		  vlib_node_runtime_t * node,
		  vlib_frame_t * frame, ip6_error_t error_code)
{
  u32 *buffers = vlib_frame_vector_args (frame);
  uword n_packets = frame->n_vectors;

  vlib_error_drop_buffers (vm, node, buffers,
			   /* stride */ 1,
			   n_packets,
			   /* next */ 0,
			   ip6_input_node.index, error_code);

  if (node->flags & VLIB_NODE_FLAG_TRACE)
    ip6_forward_next_trace (vm, node, frame, VLIB_TX);

  return n_packets;
}

static uword
ip6_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_DROP);
}

static uword
ip6_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip6_drop_or_punt (vm, node, frame, IP6_ERROR_ADJACENCY_PUNT);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_drop_node, static) =
{
  .function = ip6_drop,
  .name = "ip6-drop",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_forward_next_trace,
  .n_next_nodes = 1,
  .next_nodes =
  {
    [0] = "error-drop",},
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_drop_node, ip6_drop);

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_punt_node, static) =
{
  .function = ip6_punt,
  .name = "ip6-punt",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_forward_next_trace,
  .n_next_nodes = 1,
  .next_nodes =
  {
    [0] = "error-punt",},
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_punt_node, ip6_punt);

/* Compute TCP/UDP/ICMP6 checksum in software. */
u16
ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
				   ip6_header_t * ip0, int *bogus_lengthp)
{
  ip_csum_t sum0;
  u16 sum16, payload_length_host_byte_order;
  u32 i, n_this_buffer, n_bytes_left;
  u32 headers_size = sizeof (ip0[0]);
  void *data_this_buffer;

  ASSERT (bogus_lengthp);
  *bogus_lengthp = 0;

  /* Initialize checksum with ip header. */
  sum0 = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
  payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
  data_this_buffer = (void *) (ip0 + 1);

  for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
    {
      sum0 = ip_csum_with_carry (sum0,
				 clib_mem_unaligned (&ip0->
						     src_address.as_uword[i],
						     uword));
      sum0 =
	ip_csum_with_carry (sum0,
			    clib_mem_unaligned (&ip0->dst_address.as_uword[i],
						uword));
    }

  /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
  if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
    {
      u32 skip_bytes;
      ip6_hop_by_hop_ext_t *ext_hdr =
	(ip6_hop_by_hop_ext_t *) data_this_buffer;

      /* validate really icmp6 next */
      ASSERT (ext_hdr->next_hdr == IP_PROTOCOL_ICMP6);

      skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
      data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);

      payload_length_host_byte_order -= skip_bytes;
      headers_size += skip_bytes;
    }

  n_bytes_left = n_this_buffer = payload_length_host_byte_order;
  if (p0 && n_this_buffer + headers_size > p0->current_length)
    n_this_buffer =
      p0->current_length >
      headers_size ? p0->current_length - headers_size : 0;
  while (1)
    {
      sum0 = ip_incremental_checksum (sum0, data_this_buffer, n_this_buffer);
      n_bytes_left -= n_this_buffer;
      if (n_bytes_left == 0)
	break;

      if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
	{
	  *bogus_lengthp = 1;
	  return 0xfefe;
	}
      p0 = vlib_get_buffer (vm, p0->next_buffer);
      data_this_buffer = vlib_buffer_get_current (p0);
      n_this_buffer = p0->current_length;
    }

  sum16 = ~ip_csum_fold (sum0);

  return sum16;
}

u32
ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
{
  ip6_header_t *ip0 = vlib_buffer_get_current (p0);
  udp_header_t *udp0;
  u16 sum16;
  int bogus_length;

  /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
  ASSERT (ip0->protocol == IP_PROTOCOL_TCP
	  || ip0->protocol == IP_PROTOCOL_ICMP6
	  || ip0->protocol == IP_PROTOCOL_UDP
	  || ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);

  udp0 = (void *) (ip0 + 1);
  if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
    {
      p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
		    | IP_BUFFER_L4_CHECKSUM_CORRECT);
      return p0->flags;
    }

  sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);

  p0->flags |= (IP_BUFFER_L4_CHECKSUM_COMPUTED
		| ((sum16 == 0) << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT));

  return p0->flags;
}

/* ip6_locate_header
 *
 * This function is to search for the header specified by the find_hdr number.
 *   1. If the find_hdr < 0 then it finds and returns the protocol number and
 *   offset stored in *offset of the transport or ESP header in the chain if
 *   found.
 *   2. If a header with find_hdr > 0 protocol number is found then the
 *      offset is stored in *offset and protocol number of the header is
 *      returned.
 *   3. If find_hdr header is not found or packet is malformed or
 *      it is a non-first fragment -1 is returned.
 */
always_inline int
ip6_locate_header (vlib_buffer_t * p0,
		   ip6_header_t * ip0, int find_hdr, u32 * offset)
{
  u8 next_proto = ip0->protocol;
  u8 *next_header;
  u8 done = 0;
  u32 cur_offset;
  u8 *temp_nxthdr = 0;
  u32 exthdr_len = 0;

  next_header = ip6_next_header (ip0);
  cur_offset = sizeof (ip6_header_t);
  while (1)
    {
      done = (next_proto == find_hdr);
      if (PREDICT_FALSE
	  (next_header >=
	   (u8 *) vlib_buffer_get_current (p0) + p0->current_length))
	{
	  //A malicious packet could set an extension header with a too big size
	  return (-1);
	}
      if (done)
	break;
      if ((!ip6_ext_hdr (next_proto)) || next_proto == IP_PROTOCOL_IP6_NONXT)
	{
	  if (find_hdr < 0)
	    break;
	  return -1;
	}
      if (next_proto == IP_PROTOCOL_IPV6_FRAGMENTATION)
	{
	  ip6_frag_hdr_t *frag_hdr = (ip6_frag_hdr_t *) next_header;
	  u16 frag_off = ip6_frag_hdr_offset (frag_hdr);
	  /* Non first fragment return -1 */
	  if (frag_off)
	    return (-1);
	  exthdr_len = sizeof (ip6_frag_hdr_t);
	  temp_nxthdr = next_header + exthdr_len;
	}
      else if (next_proto == IP_PROTOCOL_IPSEC_AH)
	{
	  exthdr_len =
	    ip6_ext_authhdr_len (((ip6_ext_header_t *) next_header));
	  temp_nxthdr = next_header + exthdr_len;
	}
      else
	{
	  exthdr_len =
	    ip6_ext_header_len (((ip6_ext_header_t *) next_header));
	  temp_nxthdr = next_header + exthdr_len;
	}
      next_proto = ((ip6_ext_header_t *) next_header)->next_hdr;
      next_header = temp_nxthdr;
      cur_offset += exthdr_len;
    }

  *offset = cur_offset;
  return (next_proto);
}

static uword
ip6_local (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  ip6_main_t *im = &ip6_main;
  ip_lookup_main_t *lm = &im->lookup_main;
  ip_local_next_t next_index;
  u32 *from, *to_next, n_left_from, n_left_to_next;
  vlib_node_runtime_t *error_node =
    vlib_node_get_runtime (vm, ip6_input_node.index);

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  next_index = node->cached_next_index;

  if (node->flags & VLIB_NODE_FLAG_TRACE)
    ip6_forward_next_trace (vm, node, frame, VLIB_TX);

  while (n_left_from > 0)
    {
      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	  vlib_buffer_t *p0, *p1;
	  ip6_header_t *ip0, *ip1;
	  udp_header_t *udp0, *udp1;
	  u32 pi0, ip_len0, udp_len0, flags0, next0;
	  u32 pi1, ip_len1, udp_len1, flags1, next1;
	  i32 len_diff0, len_diff1;
	  u8 error0, type0, good_l4_checksum0;
	  u8 error1, type1, good_l4_checksum1;
	  u32 udp_offset0, udp_offset1;

	  pi0 = to_next[0] = from[0];
	  pi1 = to_next[1] = from[1];
	  from += 2;
	  n_left_from -= 2;
	  to_next += 2;
	  n_left_to_next -= 2;

	  p0 = vlib_get_buffer (vm, pi0);
	  p1 = vlib_get_buffer (vm, pi1);

	  ip0 = vlib_buffer_get_current (p0);
	  ip1 = vlib_buffer_get_current (p1);

	  vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;
	  vnet_buffer (p1)->ip.start_of_ip_header = p1->current_data;

	  type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
	  type1 = lm->builtin_protocol_by_ip_protocol[ip1->protocol];

	  next0 = lm->local_next_by_ip_protocol[ip0->protocol];
	  next1 = lm->local_next_by_ip_protocol[ip1->protocol];

	  flags0 = p0->flags;
	  flags1 = p1->flags;

	  good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
	  good_l4_checksum1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
	  len_diff0 = 0;
	  len_diff1 = 0;

	  /* Skip HBH local processing */
	  if (PREDICT_FALSE
	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      ip6_hop_by_hop_ext_t *ext_hdr =
		(ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
	      next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
	      type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
	    }
	  if (PREDICT_FALSE
	      (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      ip6_hop_by_hop_ext_t *ext_hdr =
		(ip6_hop_by_hop_ext_t *) ip6_next_header (ip1);
	      next1 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
	      type1 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
	    }
	  if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
								  IP_PROTOCOL_UDP,
								  &udp_offset0)))
	    {
	      udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
	      /* Don't verify UDP checksum for packets with explicit zero checksum. */
	      good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
		&& udp0->checksum == 0;
	      /* Verify UDP length. */
	      ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
	      udp_len0 = clib_net_to_host_u16 (udp0->length);
	      len_diff0 = ip_len0 - udp_len0;
	    }
	  if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p1, ip1,
								  IP_PROTOCOL_UDP,
								  &udp_offset1)))
	    {
	      udp1 = (udp_header_t *) ((u8 *) ip1 + udp_offset1);
	      /* Don't verify UDP checksum for packets with explicit zero checksum. */
	      good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UDP
		&& udp1->checksum == 0;
	      /* Verify UDP length. */
	      ip_len1 = clib_net_to_host_u16 (ip1->payload_length);
	      udp_len1 = clib_net_to_host_u16 (udp1->length);
	      len_diff1 = ip_len1 - udp_len1;
	    }

	  good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
	  good_l4_checksum1 |= type1 == IP_BUILTIN_PROTOCOL_UNKNOWN;

	  len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;
	  len_diff1 = type1 == IP_BUILTIN_PROTOCOL_UDP ? len_diff1 : 0;

	  if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
			     && !good_l4_checksum0
			     && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
	    {
	      flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
	      good_l4_checksum0 =
		(flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
	    }
	  if (PREDICT_FALSE (type1 != IP_BUILTIN_PROTOCOL_UNKNOWN
			     && !good_l4_checksum1
			     && !(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
	    {
	      flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, p1);
	      good_l4_checksum1 =
		(flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
	    }

	  error0 = error1 = IP6_ERROR_UNKNOWN_PROTOCOL;

	  error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;
	  error1 = len_diff1 < 0 ? IP6_ERROR_UDP_LENGTH : error1;

	  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
		  IP6_ERROR_UDP_CHECKSUM);
	  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
		  IP6_ERROR_ICMP_CHECKSUM);
	  error0 =
	    (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);
	  error1 =
	    (!good_l4_checksum1 ? IP6_ERROR_UDP_CHECKSUM + type1 : error1);

	  /* Drop packets from unroutable hosts. */
	  /* If this is a neighbor solicitation (ICMP), skip source RPF check */
	  if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
	      type0 != IP_BUILTIN_PROTOCOL_ICMP &&
	      !ip6_address_is_link_local_unicast (&ip0->src_address))
	    {
	      error0 = (!ip6_urpf_loose_check (im, p0, ip0)
			? IP6_ERROR_SRC_LOOKUP_MISS : error0);
	    }
	  if (error1 == IP6_ERROR_UNKNOWN_PROTOCOL &&
	      type1 != IP_BUILTIN_PROTOCOL_ICMP &&
	      !ip6_address_is_link_local_unicast (&ip1->src_address))
	    {
	      error1 = (!ip6_urpf_loose_check (im, p1, ip1)
			? IP6_ERROR_SRC_LOOKUP_MISS : error1);
	    }

	  next0 =
	    error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;
	  next1 =
	    error1 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next1;

	  p0->error = error_node->errors[error0];
	  p1->error = error_node->errors[error1];

	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
					   to_next, n_left_to_next,
					   pi0, pi1, next0, next1);
	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  vlib_buffer_t *p0;
	  ip6_header_t *ip0;
	  udp_header_t *udp0;
	  u32 pi0, ip_len0, udp_len0, flags0, next0;
	  i32 len_diff0;
	  u8 error0, type0, good_l4_checksum0;
	  u32 udp_offset0;

	  pi0 = to_next[0] = from[0];
	  from += 1;
	  n_left_from -= 1;
	  to_next += 1;
	  n_left_to_next -= 1;

	  p0 = vlib_get_buffer (vm, pi0);

	  ip0 = vlib_buffer_get_current (p0);

	  vnet_buffer (p0)->ip.start_of_ip_header = p0->current_data;

	  type0 = lm->builtin_protocol_by_ip_protocol[ip0->protocol];
	  next0 = lm->local_next_by_ip_protocol[ip0->protocol];

	  flags0 = p0->flags;

	  good_l4_checksum0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
	  len_diff0 = 0;

	  /* Skip HBH local processing */
	  if (PREDICT_FALSE
	      (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
	    {
	      ip6_hop_by_hop_ext_t *ext_hdr =
		(ip6_hop_by_hop_ext_t *) ip6_next_header (ip0);
	      next0 = lm->local_next_by_ip_protocol[ext_hdr->next_hdr];
	      type0 = lm->builtin_protocol_by_ip_protocol[ext_hdr->next_hdr];
	    }
	  if (PREDICT_TRUE (IP_PROTOCOL_UDP == ip6_locate_header (p0, ip0,
								  IP_PROTOCOL_UDP,
								  &udp_offset0)))
	    {
	      udp0 = (udp_header_t *) ((u8 *) ip0 + udp_offset0);
	      /* Don't verify UDP checksum for packets with explicit zero checksum. */
	      good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UDP
		&& udp0->checksum == 0;
	      /* Verify UDP length. */
	      ip_len0 = clib_net_to_host_u16 (ip0->payload_length);
	      udp_len0 = clib_net_to_host_u16 (udp0->length);
	      len_diff0 = ip_len0 - udp_len0;
	    }

	  good_l4_checksum0 |= type0 == IP_BUILTIN_PROTOCOL_UNKNOWN;
	  len_diff0 = type0 == IP_BUILTIN_PROTOCOL_UDP ? len_diff0 : 0;

	  if (PREDICT_FALSE (type0 != IP_BUILTIN_PROTOCOL_UNKNOWN
			     && !good_l4_checksum0
			     && !(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)))
	    {
	      flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, p0);
	      good_l4_checksum0 =
		(flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
	    }

	  error0 = IP6_ERROR_UNKNOWN_PROTOCOL;

	  error0 = len_diff0 < 0 ? IP6_ERROR_UDP_LENGTH : error0;

	  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
		  IP6_ERROR_UDP_CHECKSUM);
	  ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
		  IP6_ERROR_ICMP_CHECKSUM);
	  error0 =
	    (!good_l4_checksum0 ? IP6_ERROR_UDP_CHECKSUM + type0 : error0);

	  /* If this is a neighbor solicitation (ICMP), skip source RPF check */
	  if (error0 == IP6_ERROR_UNKNOWN_PROTOCOL &&
	      type0 != IP_BUILTIN_PROTOCOL_ICMP &&
	      !ip6_address_is_link_local_unicast (&ip0->src_address))
	    {
	      error0 = (!ip6_urpf_loose_check (im, p0, ip0)
			? IP6_ERROR_SRC_LOOKUP_MISS : error0);
	    }

	  next0 =
	    error0 != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next0;

	  p0->error = error_node->errors[error0];

	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
					   to_next, n_left_to_next,
					   pi0, next0);
	}

      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }

  return frame->n_vectors;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_local_node, static) =
{
  .function = ip6_local,
  .name = "ip6-local",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_forward_next_trace,
  .n_next_nodes = IP_LOCAL_N_NEXT,
  .next_nodes =
  {
    [IP_LOCAL_NEXT_DROP] = "error-drop",
    [IP_LOCAL_NEXT_PUNT] = "error-punt",
    [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
    [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
  },
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_local_node, ip6_local);

void
ip6_register_protocol (u32 protocol, u32 node_index)
{
  vlib_main_t *vm = vlib_get_main ();
  ip6_main_t *im = &ip6_main;
  ip_lookup_main_t *lm = &im->lookup_main;

  ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
  lm->local_next_by_ip_protocol[protocol] =
    vlib_node_add_next (vm, ip6_local_node.index, node_index);
}

typedef enum
{
  IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
  IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
  IP6_DISCOVER_NEIGHBOR_N_NEXT,
} ip6_discover_neighbor_next_t;

typedef enum
{
  IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
  IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
  IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
} ip6_discover_neighbor_error_t;

static uword
ip6_discover_neighbor_inline (vlib_main_t * vm,
			      vlib_node_runtime_t * node,
			      vlib_frame_t * frame, int is_glean)
{
  vnet_main_t *vnm = vnet_get_main ();
  ip6_main_t *im = &ip6_main;
  ip_lookup_main_t *lm = &im->lookup_main;
  u32 *from, *to_next_drop;
  uword n_left_from, n_left_to_next_drop;
  static f64 time_last_seed_change = -1e100;
  static u32 hash_seeds[3];
  static uword hash_bitmap[256 / BITS (uword)];
  f64 time_now;
  int bogus_length;

  if (node->flags & VLIB_NODE_FLAG_TRACE)
    ip6_forward_next_trace (vm, node, frame, VLIB_TX);

  time_now = vlib_time_now (vm);
  if (time_now - time_last_seed_change > 1e-3)
    {
      uword i;
      u32 *r = clib_random_buffer_get_data (&vm->random_buffer,
					    sizeof (hash_seeds));
      for (i = 0; i < ARRAY_LEN (hash_seeds); i++)
	hash_seeds[i] = r[i];

      /* Mark all hash keys as been not-seen before. */
      for (i = 0; i < ARRAY_LEN (hash_bitmap); i++)
	hash_bitmap[i] = 0;

      time_last_seed_change = time_now;
    }

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;

  while (n_left_from > 0)
    {
      vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
			   to_next_drop, n_left_to_next_drop);

      while (n_left_from > 0 && n_left_to_next_drop > 0)
	{
	  vlib_buffer_t *p0;
	  ip6_header_t *ip0;
	  u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0;
	  uword bm0;
	  ip_adjacency_t *adj0;
	  vnet_hw_interface_t *hw_if0;
	  u32 next0;

	  pi0 = from[0];

	  p0 = vlib_get_buffer (vm, pi0);

	  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];

	  ip0 = vlib_buffer_get_current (p0);

	  adj0 = ip_get_adjacency (lm, adj_index0);

	  if (!is_glean)
	    {
	      ip0->dst_address.as_u64[0] =
		adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
	      ip0->dst_address.as_u64[1] =
		adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
	    }

	  a0 = hash_seeds[0];
	  b0 = hash_seeds[1];
	  c0 = hash_seeds[2];

	  sw_if_index0 = adj0->rewrite_header.sw_if_index;
	  vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;

	  a0 ^= sw_if_index0;
	  b0 ^= ip0->dst_address.as_u32[0];
	  c0 ^= ip0->dst_address.as_u32[1];

	  hash_v3_mix32 (a0, b0, c0);

	  b0 ^= ip0->dst_address.as_u32[2];
	  c0 ^= ip0->dst_address.as_u32[3];

	  hash_v3_finalize32 (a0, b0, c0);

	  c0 &= BITS (hash_bitmap) - 1;
	  c0 = c0 / BITS (uword);
	  m0 = (uword) 1 << (c0 % BITS (uword));

	  bm0 = hash_bitmap[c0];
	  drop0 = (bm0 & m0) != 0;

	  /* Mark it as seen. */
	  hash_bitmap[c0] = bm0 | m0;

	  from += 1;
	  n_left_from -= 1;
	  to_next_drop[0] = pi0;
	  to_next_drop += 1;
	  n_left_to_next_drop -= 1;

	  hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);

	  /* If the interface is link-down, drop the pkt */
	  if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
	    drop0 = 1;

	  p0->error =
	    node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
			 : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
	  if (drop0)
	    continue;

	  /*
	   * the adj has been updated to a rewrite but the node the DPO that got
	   * us here hasn't - yet. no big deal. we'll drop while we wait.
	   */
	  if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
	    continue;

	  {
	    u32 bi0 = 0;
	    icmp6_neighbor_solicitation_header_t *h0;
	    vlib_buffer_t *b0;

	    h0 = vlib_packet_template_get_packet
	      (vm, &im->discover_neighbor_packet_template, &bi0);

	    /*
	     * Build ethernet header.
	     * Choose source address based on destination lookup
	     * adjacency.
	     */
	    if (ip6_src_address_for_packet (lm,
					    sw_if_index0,
					    &h0->ip.src_address))
	      {
		/* There is no address on the interface */
		p0->error =
		  node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
		vlib_buffer_free (vm, &bi0, 1);
		continue;
	      }

	    /*
	     * Destination address is a solicited node multicast address.
	     * We need to fill in
	     * the low 24 bits with low 24 bits of target's address.
	     */
	    h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
	    h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
	    h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];

	    h0->neighbor.target_address = ip0->dst_address;

	    clib_memcpy (h0->link_layer_option.ethernet_address,
			 hw_if0->hw_address, vec_len (hw_if0->hw_address));

	    /* $$$$ appears we need this; why is the checksum non-zero? */
	    h0->neighbor.icmp.checksum = 0;
	    h0->neighbor.icmp.checksum =
	      ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
						 &bogus_length);

	    ASSERT (bogus_length == 0);

	    vlib_buffer_copy_trace_flag (vm, p0, bi0);
	    b0 = vlib_get_buffer (vm, bi0);
	    vnet_buffer (b0)->sw_if_index[VLIB_TX]
	      = vnet_buffer (p0)->sw_if_index[VLIB_TX];

	    /* Add rewrite/encap string. */
	    vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t));
	    vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes);

	    next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;

	    vlib_set_next_frame_buffer (vm, node, next0, bi0);
	  }
	}

      vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
			   n_left_to_next_drop);
    }

  return frame->n_vectors;
}

static uword
ip6_discover_neighbor (vlib_main_t * vm,
		       vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return (ip6_discover_neighbor_inline (vm, node, frame, 0));
}

static uword
ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return (ip6_discover_neighbor_inline (vm, node, frame, 1));
}

static char *ip6_discover_neighbor_error_strings[] = {
  [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
  [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
  [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
    = "no source address for ND solicitation",
};

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
{
  .function = ip6_discover_neighbor,
  .name = "ip6-discover-neighbor",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_forward_next_trace,
  .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
  .error_strings = ip6_discover_neighbor_error_strings,
  .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
  .next_nodes =
  {
    [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
    [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
  },
};
/* *INDENT-ON* */

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_glean_node) =
{
  .function = ip6_glean,
  .name = "ip6-glean",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_forward_next_trace,
  .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
  .error_strings = ip6_discover_neighbor_error_strings,
  .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
  .next_nodes =
  {
    [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "error-drop",
    [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output",
  },
};
/* *INDENT-ON* */

clib_error_t *
ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
{
  vnet_main_t *vnm = vnet_get_main ();
  ip6_main_t *im = &ip6_main;
  icmp6_neighbor_solicitation_header_t *h;
  ip6_address_t *src;
  ip_interface_address_t *ia;
  ip_adjacency_t *adj;
  vnet_hw_interface_t *hi;
  vnet_sw_interface_t *si;
  vlib_buffer_t *b;
  u32 bi = 0;
  int bogus_length;

  si = vnet_get_sw_interface (vnm, sw_if_index);

  if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
    {
      return clib_error_return (0, "%U: interface %U down",
				format_ip6_address, dst,
				format_vnet_sw_if_index_name, vnm,
				sw_if_index);
    }

  src =
    ip6_interface_address_matching_destination (im, dst, sw_if_index, &ia);
  if (!src)
    {
      vnm->api_errno = VNET_API_ERROR_NO_MATCHING_INTERFACE;
      return clib_error_return
	(0, "no matching interface address for destination %U (interface %U)",
	 format_ip6_address, dst,
	 format_vnet_sw_if_index_name, vnm, sw_if_index);
    }

  h =
    vlib_packet_template_get_packet (vm,
				     &im->discover_neighbor_packet_template,
				     &bi);

  hi = vnet_get_sup_hw_interface (vnm, sw_if_index);

  /* Destination address is a solicited node multicast address.  We need to fill in
     the low 24 bits with low 24 bits of target's address. */
  h->ip.dst_address.as_u8[13] = dst->as_u8[13];
  h->ip.dst_address.as_u8[14] = dst->as_u8[14];
  h->ip.dst_address.as_u8[15] = dst->as_u8[15];

  h->ip.src_address = src[0];
  h->neighbor.target_address = dst[0];

  clib_memcpy (h->link_layer_option.ethernet_address, hi->hw_address,
	       vec_len (hi->hw_address));

  h->neighbor.icmp.checksum =
    ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
  ASSERT (bogus_length == 0);

  b = vlib_get_buffer (vm, bi);
  vnet_buffer (b)->sw_if_index[VLIB_RX] =
    vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;

  /* Add encapsulation string for software interface (e.g. ethernet header). */
  adj = ip_get_adjacency (&im->lookup_main, ia->neighbor_probe_adj_index);
  vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
  vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);

  {
    vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
    u32 *to_next = vlib_frame_vector_args (f);
    to_next[0] = bi;
    f->n_vectors = 1;
    vlib_put_frame_to_node (vm, hi->output_node_index, f);
  }

  return /* no error */ 0;
}

typedef enum
{
  IP6_REWRITE_NEXT_DROP,
  IP6_REWRITE_NEXT_ICMP_ERROR,
} ip6_rewrite_next_t;

always_inline uword
ip6_rewrite_inline (vlib_main_t * vm,
		    vlib_node_runtime_t * node,
		    vlib_frame_t * frame, int is_midchain, int is_mcast)
{
  ip_lookup_main_t *lm = &ip6_main.lookup_main;
  u32 *from = vlib_frame_vector_args (frame);
  u32 n_left_from, n_left_to_next, *to_next, next_index;
  vlib_node_runtime_t *error_node =
    vlib_node_get_runtime (vm, ip6_input_node.index);

  n_left_from = frame->n_vectors;
  next_index = node->cached_next_index;
  u32 cpu_index = os_get_cpu_number ();

  while (n_left_from > 0)
    {
      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	  ip_adjacency_t *adj0, *adj1;
	  vlib_buffer_t *p0, *p1;
	  ip6_header_t *ip0, *ip1;
	  u32 pi0, rw_len0, next0, error0, adj_index0;
	  u32 pi1, rw_len1, next1, error1, adj_index1;
	  u32 tx_sw_if_index0, tx_sw_if_index1;

	  /* Prefetch next iteration. */
	  {
	    vlib_buffer_t *p2, *p3;

	    p2 = vlib_get_buffer (vm, from[2]);
	    p3 = vlib_get_buffer (vm, from[3]);

	    vlib_prefetch_buffer_header (p2, LOAD);
	    vlib_prefetch_buffer_header (p3, LOAD);

	    CLIB_PREFETCH (p2->pre_data, 32, STORE);
	    CLIB_PREFETCH (p3->pre_data, 32, STORE);

	    CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
	    CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
	  }

	  pi0 = to_next[0] = from[0];
	  pi1 = to_next[1] = from[1];

	  from += 2;
	  n_left_from -= 2;
	  to_next += 2;
	  n_left_to_next -= 2;

	  p0 = vlib_get_buffer (vm, pi0);
	  p1 = vlib_get_buffer (vm, pi1);

	  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
	  adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];

	  /* We should never rewrite a pkt using the MISS adjacency */
	  ASSERT (adj_index0 && adj_index1);

	  ip0 = vlib_buffer_get_current (p0);
	  ip1 = vlib_buffer_get_current (p1);

	  error0 = error1 = IP6_ERROR_NONE;
	  next0 = next1 = IP6_REWRITE_NEXT_DROP;

	  if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
	    {
	      i32 hop_limit0 = ip0->hop_limit;

	      /* Input node should have reject packets with hop limit 0. */
	      ASSERT (ip0->hop_limit > 0);

	      hop_limit0 -= 1;

	      ip0->hop_limit = hop_limit0;

	      /*
	       * If the hop count drops below 1 when forwarding, generate
	       * an ICMP response.
	       */
	      if (PREDICT_FALSE (hop_limit0 <= 0))
		{
		  error0 = IP6_ERROR_TIME_EXPIRED;
		  next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
		  vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
		  icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
					       ICMP6_time_exceeded_ttl_exceeded_in_transit,
					       0);
		}
	    }
	  else
	    {
	      p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
	    }
	  if (PREDICT_TRUE (!(p1->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
	    {
	      i32 hop_limit1 = ip1->hop_limit;

	      /* Input node should have reject packets with hop limit 0. */
	      ASSERT (ip1->hop_limit > 0);

	      hop_limit1 -= 1;

	      ip1->hop_limit = hop_limit1;

	      /*
	       * If the hop count drops below 1 when forwarding, generate
	       * an ICMP response.
	       */
	      if (PREDICT_FALSE (hop_limit1 <= 0))
		{
		  error1 = IP6_ERROR_TIME_EXPIRED;
		  next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
		  vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
		  icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
					       ICMP6_time_exceeded_ttl_exceeded_in_transit,
					       0);
		}
	    }
	  else
	    {
	      p1->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
	    }
	  adj0 = ip_get_adjacency (lm, adj_index0);
	  adj1 = ip_get_adjacency (lm, adj_index1);

	  rw_len0 = adj0[0].rewrite_header.data_bytes;
	  rw_len1 = adj1[0].rewrite_header.data_bytes;
	  vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
	  vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;

	  vlib_increment_combined_counter
	    (&adjacency_counters,
	     cpu_index,
	     adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);
	  vlib_increment_combined_counter
	    (&adjacency_counters,
	     cpu_index, adj_index1,
	     1, vlib_buffer_length_in_chain (vm, p1) + rw_len1);

	  /* Check MTU of outgoing interface. */
	  error0 =
	    (vlib_buffer_length_in_chain (vm, p0) >
	     adj0[0].
	     rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
	     error0);
	  error1 =
	    (vlib_buffer_length_in_chain (vm, p1) >
	     adj1[0].
	     rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
	     error1);

	  /* Don't adjust the buffer for hop count issue; icmp-error node
	   * wants to see the IP headerr */
	  if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
	    {
	      p0->current_data -= rw_len0;
	      p0->current_length += rw_len0;

	      tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
	      vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
	      next0 = adj0[0].rewrite_header.next_index;

	      vnet_feature_arc_start (lm->output_feature_arc_index,
				      tx_sw_if_index0, &next0, p0);
	    }
	  if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
	    {
	      p1->current_data -= rw_len1;
	      p1->current_length += rw_len1;

	      tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
	      vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
	      next1 = adj1[0].rewrite_header.next_index;

	      vnet_feature_arc_start (lm->output_feature_arc_index,
				      tx_sw_if_index1, &next1, p1);
	    }

	  /* Guess we are only writing on simple Ethernet header. */
	  vnet_rewrite_two_headers (adj0[0], adj1[0],
				    ip0, ip1, sizeof (ethernet_header_t));

	  if (is_midchain)
	    {
	      adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
	      adj1->sub_type.midchain.fixup_func (vm, adj1, p1);
	    }
	  if (is_mcast)
	    {
	      /*
	       * copy bytes from the IP address into the MAC rewrite
	       */
	      vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0, 0);
	      vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1, 0);
	    }

	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
					   to_next, n_left_to_next,
					   pi0, pi1, next0, next1);
	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  ip_adjacency_t *adj0;
	  vlib_buffer_t *p0;
	  ip6_header_t *ip0;
	  u32 pi0, rw_len0;
	  u32 adj_index0, next0, error0;
	  u32 tx_sw_if_index0;

	  pi0 = to_next[0] = from[0];

	  p0 = vlib_get_buffer (vm, pi0);

	  adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];

	  /* We should never rewrite a pkt using the MISS adjacency */
	  ASSERT (adj_index0);

	  adj0 = ip_get_adjacency (lm, adj_index0);

	  ip0 = vlib_buffer_get_current (p0);

	  error0 = IP6_ERROR_NONE;
	  next0 = IP6_REWRITE_NEXT_DROP;

	  /* Check hop limit */
	  if (PREDICT_TRUE (!(p0->flags & VNET_BUFFER_LOCALLY_ORIGINATED)))
	    {
	      i32 hop_limit0 = ip0->hop_limit;

	      ASSERT (ip0->hop_limit > 0);

	      hop_limit0 -= 1;

	      ip0->hop_limit = hop_limit0;

	      if (PREDICT_FALSE (hop_limit0 <= 0))
		{
		  /*
		   * If the hop count drops below 1 when forwarding, generate
		   * an ICMP response.
		   */
		  error0 = IP6_ERROR_TIME_EXPIRED;
		  next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
		  vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
		  icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
					       ICMP6_time_exceeded_ttl_exceeded_in_transit,
					       0);
		}
	    }
	  else
	    {
	      p0->flags &= ~VNET_BUFFER_LOCALLY_ORIGINATED;
	    }

	  /* Guess we are only writing on simple Ethernet header. */
	  vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));

	  /* Update packet buffer attributes/set output interface. */
	  rw_len0 = adj0[0].rewrite_header.data_bytes;
	  vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;

	  vlib_increment_combined_counter
	    (&adjacency_counters,
	     cpu_index,
	     adj_index0, 1, vlib_buffer_length_in_chain (vm, p0) + rw_len0);

	  /* Check MTU of outgoing interface. */
	  error0 =
	    (vlib_buffer_length_in_chain (vm, p0) >
	     adj0[0].
	     rewrite_header.max_l3_packet_bytes ? IP6_ERROR_MTU_EXCEEDED :
	     error0);

	  /* Don't adjust the buffer for hop count issue; icmp-error node
	   * wants to see the IP headerr */
	  if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
	    {
	      p0->current_data -= rw_len0;
	      p0->current_length += rw_len0;

	      tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;

	      vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
	      next0 = adj0[0].rewrite_header.next_index;

	      vnet_feature_arc_start (lm->output_feature_arc_index,
				      tx_sw_if_index0, &next0, p0);
	    }

	  if (is_midchain)
	    {
	      adj0->sub_type.midchain.fixup_func (vm, adj0, p0);
	    }
	  if (is_mcast)
	    {
	      vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0, 0);
	    }

	  p0->error = error_node->errors[error0];

	  from += 1;
	  n_left_from -= 1;
	  to_next += 1;
	  n_left_to_next -= 1;

	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
					   to_next, n_left_to_next,
					   pi0, next0);
	}

      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }

  /* Need to do trace after rewrites to pick up new packet data. */
  if (node->flags & VLIB_NODE_FLAG_TRACE)
    ip6_forward_next_trace (vm, node, frame, VLIB_TX);

  return frame->n_vectors;
}

static uword
ip6_rewrite (vlib_main_t * vm,
	     vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip6_rewrite_inline (vm, node, frame, 0, 0);
}

static uword
ip6_rewrite_mcast (vlib_main_t * vm,
		   vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip6_rewrite_inline (vm, node, frame, 0, 1);
}

static uword
ip6_midchain (vlib_main_t * vm,
	      vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  return ip6_rewrite_inline (vm, node, frame, 1, 0);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_midchain_node) =
{
  .function = ip6_midchain,
  .name = "ip6-midchain",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_forward_next_trace,
  .sibling_of = "ip6-rewrite",
  };
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_midchain_node, ip6_midchain);

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_rewrite_node) =
{
  .function = ip6_rewrite,
  .name = "ip6-rewrite",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_rewrite_trace,
  .n_next_nodes = 2,
  .next_nodes =
  {
    [IP6_REWRITE_NEXT_DROP] = "error-drop",
    [IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
  },
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_node, ip6_rewrite);

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
{
  .function = ip6_rewrite_mcast,
  .name = "ip6-rewrite-mcast",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_rewrite_trace,
  .sibling_of = "ip6-rewrite",
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_rewrite_mcast_node, ip6_rewrite_mcast);

/*
 * Hop-by-Hop handling
 */
ip6_hop_by_hop_main_t ip6_hop_by_hop_main;

#define foreach_ip6_hop_by_hop_error \
_(PROCESSED, "pkts with ip6 hop-by-hop options") \
_(FORMAT, "incorrectly formatted hop-by-hop options") \
_(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")

/* *INDENT-OFF* */
typedef enum
{
#define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
  foreach_ip6_hop_by_hop_error
#undef _
  IP6_HOP_BY_HOP_N_ERROR,
} ip6_hop_by_hop_error_t;
/* *INDENT-ON* */

/*
 * Primary h-b-h handler trace support
 * We work pretty hard on the problem for obvious reasons
 */
typedef struct
{
  u32 next_index;
  u32 trace_len;
  u8 option_data[256];
} ip6_hop_by_hop_trace_t;

vlib_node_registration_t ip6_hop_by_hop_node;

static char *ip6_hop_by_hop_error_strings[] = {
#define _(sym,string) string,
  foreach_ip6_hop_by_hop_error
#undef _
};

static u8 *
format_ip6_hop_by_hop_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
  ip6_hop_by_hop_header_t *hbh0;
  ip6_hop_by_hop_option_t *opt0, *limit0;
  ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;

  u8 type0;

  hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;

  s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
	      t->next_index, (hbh0->length + 1) << 3, t->trace_len);

  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
  limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;

  while (opt0 < limit0)
    {
      type0 = opt0->type;
      switch (type0)
	{
	case 0:		/* Pad, just stop */
	  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
	  break;

	default:
	  if (hm->trace[type0])
	    {
	      s = (*hm->trace[type0]) (s, opt0);
	    }
	  else
	    {
	      s =
		format (s, "\n    unrecognized option %d length %d", type0,
			opt0->length);
	    }
	  opt0 =
	    (ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
					 sizeof (ip6_hop_by_hop_option_t));
	  break;
	}
    }
  return s;
}

always_inline u8
ip6_scan_hbh_options (vlib_buffer_t * b0,
		      ip6_header_t * ip0,
		      ip6_hop_by_hop_header_t * hbh0,
		      ip6_hop_by_hop_option_t * opt0,
		      ip6_hop_by_hop_option_t * limit0, u32 * next0)
{
  ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
  u8 type0;
  u8 error0 = 0;

  while (opt0 < limit0)
    {
      type0 = opt0->type;
      switch (type0)
	{
	case 0:		/* Pad1 */
	  opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
	  continue;
	case 1:		/* PadN */
	  break;
	default:
	  if (hm->options[type0])
	    {
	      if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
		{
		  error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
		  return (error0);
		}
	    }
	  else
	    {
	      /* Unrecognized mandatory option, check the two high order bits */
	      switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
		{
		case HBH_OPTION_TYPE_SKIP_UNKNOWN:
		  break;
		case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
		  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
		  *next0 = IP_LOOKUP_NEXT_DROP;
		  break;
		case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
		  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
		  *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
		  icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
					       ICMP6_parameter_problem_unrecognized_option,
					       (u8 *) opt0 - (u8 *) ip0);
		  break;
		case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
		  error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
		  if (!ip6_address_is_multicast (&ip0->dst_address))
		    {
		      *next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
		      icmp6_error_set_vnet_buffer (b0,
						   ICMP6_parameter_problem,
						   ICMP6_parameter_problem_unrecognized_option,
						   (u8 *) opt0 - (u8 *) ip0);
		    }
		  else
		    {
		      *next0 = IP_LOOKUP_NEXT_DROP;
		    }
		  break;
		}
	      return (error0);
	    }
	}
      opt0 =
	(ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
				     sizeof (ip6_hop_by_hop_option_t));
    }
  return (error0);
}

/*
 * Process the Hop-by-Hop Options header
 */
static uword
ip6_hop_by_hop (vlib_main_t * vm,
		vlib_node_runtime_t * node, vlib_frame_t * frame)
{
  vlib_node_runtime_t *error_node =
    vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
  ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
  u32 n_left_from, *from, *to_next;
  ip_lookup_next_t next_index;
  ip6_main_t *im = &ip6_main;
  ip_lookup_main_t *lm = &im->lookup_main;

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  next_index = node->cached_next_index;

  while (n_left_from > 0)
    {
      u32 n_left_to_next;

      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      while (n_left_from >= 4 && n_left_to_next >= 2)
	{
	  u32 bi0, bi1;
	  vlib_buffer_t *b0, *b1;
	  u32 next0, next1;
	  ip6_header_t *ip0, *ip1;
	  ip6_hop_by_hop_header_t *hbh0, *hbh1;
	  ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
	  u8 error0 = 0, error1 = 0;

	  /* Prefetch next iteration. */
	  {
	    vlib_buffer_t *p2, *p3;

	    p2 = vlib_get_buffer (vm, from[2]);
	    p3 = vlib_get_buffer (vm, from[3]);

	    vlib_prefetch_buffer_header (p2, LOAD);
	    vlib_prefetch_buffer_header (p3, LOAD);

	    CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
	    CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
	  }

	  /* Speculatively enqueue b0, b1 to the current next frame */
	  to_next[0] = bi0 = from[0];
	  to_next[1] = bi1 = from[1];
	  from += 2;
	  to_next += 2;
	  n_left_from -= 2;
	  n_left_to_next -= 2;

	  b0 = vlib_get_buffer (vm, bi0);
	  b1 = vlib_get_buffer (vm, bi1);

	  /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
	  u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
	  ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
	  u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
	  ip_adjacency_t *adj1 = ip_get_adjacency (lm, adj_index1);

	  /* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
	  next0 = adj0->lookup_next_index;
	  next1 = adj1->lookup_next_index;

	  ip0 = vlib_buffer_get_current (b0);
	  ip1 = vlib_buffer_get_current (b1);
	  hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
	  hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
	  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
	  opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
	  limit0 =
	    (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
					 ((hbh0->length + 1) << 3));
	  limit1 =
	    (ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
					 ((hbh1->length + 1) << 3));

	  /*
	   * Basic validity checks
	   */
	  if ((hbh0->length + 1) << 3 >
	      clib_net_to_host_u16 (ip0->payload_length))
	    {
	      error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
	      next0 = IP_LOOKUP_NEXT_DROP;
	      goto outdual;
	    }
	  /* Scan the set of h-b-h options, process ones that we understand */
	  error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);

	  if ((hbh1->length + 1) << 3 >
	      clib_net_to_host_u16 (ip1->payload_length))
	    {
	      error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
	      next1 = IP_LOOKUP_NEXT_DROP;
	      goto outdual;
	    }
	  /* Scan the set of h-b-h options, process ones that we understand */
	  error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);

	outdual:
	  /* Has the classifier flagged this buffer for special treatment? */
	  if (PREDICT_FALSE
	      ((error0 == 0)
	       && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
	    next0 = hm->next_override;

	  /* Has the classifier flagged this buffer for special treatment? */
	  if (PREDICT_FALSE
	      ((error1 == 0)
	       && (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
	    next1 = hm->next_override;

	  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
	    {
	      if (b0->flags & VLIB_BUFFER_IS_TRACED)
		{
		  ip6_hop_by_hop_trace_t *t =
		    vlib_add_trace (vm, node, b0, sizeof (*t));
		  u32 trace_len = (hbh0->length + 1) << 3;
		  t->next_index = next0;
		  /* Capture the h-b-h option verbatim */
		  trace_len =
		    trace_len <
		    ARRAY_LEN (t->option_data) ? trace_len :
		    ARRAY_LEN (t->option_data);
		  t->trace_len = trace_len;
		  clib_memcpy (t->option_data, hbh0, trace_len);
		}
	      if (b1->flags & VLIB_BUFFER_IS_TRACED)
		{
		  ip6_hop_by_hop_trace_t *t =
		    vlib_add_trace (vm, node, b1, sizeof (*t));
		  u32 trace_len = (hbh1->length + 1) << 3;
		  t->next_index = next1;
		  /* Capture the h-b-h option verbatim */
		  trace_len =
		    trace_len <
		    ARRAY_LEN (t->option_data) ? trace_len :
		    ARRAY_LEN (t->option_data);
		  t->trace_len = trace_len;
		  clib_memcpy (t->option_data, hbh1, trace_len);
		}

	    }

	  b0->error = error_node->errors[error0];
	  b1->error = error_node->errors[error1];

	  /* verify speculative enqueue, maybe switch current next frame */
	  vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, bi1, next0,
					   next1);
	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  u32 bi0;
	  vlib_buffer_t *b0;
	  u32 next0;
	  ip6_header_t *ip0;
	  ip6_hop_by_hop_header_t *hbh0;
	  ip6_hop_by_hop_option_t *opt0, *limit0;
	  u8 error0 = 0;

	  /* Speculatively enqueue b0 to the current next frame */
	  bi0 = from[0];
	  to_next[0] = bi0;
	  from += 1;
	  to_next += 1;
	  n_left_from -= 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);
	  /*
	   * Default use the next_index from the adjacency.
	   * A HBH option rarely redirects to a different node
	   */
	  u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
	  ip_adjacency_t *adj0 = ip_get_adjacency (lm, adj_index0);
	  next0 = adj0->lookup_next_index;

	  ip0 = vlib_buffer_get_current (b0);
	  hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
	  opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
	  limit0 =
	    (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
					 ((hbh0->length + 1) << 3));

	  /*
	   * Basic validity checks
	   */
	  if ((hbh0->length + 1) << 3 >
	      clib_net_to_host_u16 (ip0->payload_length))
	    {
	      error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
	      next0 = IP_LOOKUP_NEXT_DROP;
	      goto out0;
	    }

	  /* Scan the set of h-b-h options, process ones that we understand */
	  error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);

	out0:
	  /* Has the classifier flagged this buffer for special treatment? */
	  if (PREDICT_FALSE
	      ((error0 == 0)
	       && (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
	    next0 = hm->next_override;

	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      ip6_hop_by_hop_trace_t *t =
		vlib_add_trace (vm, node, b0, sizeof (*t));
	      u32 trace_len = (hbh0->length + 1) << 3;
	      t->next_index = next0;
	      /* Capture the h-b-h option verbatim */
	      trace_len =
		trace_len <
		ARRAY_LEN (t->option_data) ? trace_len :
		ARRAY_LEN (t->option_data);
	      t->trace_len = trace_len;
	      clib_memcpy (t->option_data, hbh0, trace_len);
	    }

	  b0->error = error_node->errors[error0];

	  /* verify speculative enqueue, maybe switch current next frame */
	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, next0);
	}
      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }
  return frame->n_vectors;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
{
  .function = ip6_hop_by_hop,
  .name = "ip6-hop-by-hop",
  .sibling_of = "ip6-lookup",
  .vector_size = sizeof (u32),
  .format_trace = format_ip6_hop_by_hop_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
  .error_strings = ip6_hop_by_hop_error_strings,
  .n_next_nodes = 0,
};
/* *INDENT-ON* */

VLIB_NODE_FUNCTION_MULTIARCH (ip6_hop_by_hop_node, ip6_hop_by_hop);

static clib_error_t *
ip6_hop_by_hop_init (vlib_main_t * vm)
{
  ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
  memset (hm->options, 0, sizeof (hm->options));
  memset (hm->trace, 0, sizeof (hm->trace));
  hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
  return (0);
}

VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);

void
ip6_hbh_set_next_override (uword next)
{
  ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;

  hm->next_override = next;
}

int
ip6_hbh_register_option (u8 option,
			 int options (vlib_buffer_t * b, ip6_header_t * ip,
				      ip6_hop_by_hop_option_t * opt),
			 u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
{
  ip6_main_t *im = &ip6_main;
  ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;

  ASSERT (option < ARRAY_LEN (hm->options));

  /* Already registered */
  if (hm->options[option])
    return (-1);

  hm->options[option] = options;
  hm->trace[option] = trace;

  /* Set global variable */
  im->hbh_enabled = 1;

  return (0);
}

int
ip6_hbh_unregister_option (u8 option)
{
  ip6_main_t *im = &ip6_main;
  ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;

  ASSERT (option < ARRAY_LEN (hm->options));

  /* Not registered */
  if (!hm->options[option])
    return (-1);

  hm->options[option] = NULL;
  hm->trace[option] = NULL;

  /* Disable global knob if this was the last option configured */
  int i;
  bool found = false;
  for (i = 0; i < 256; i++)
    {
      if (hm->options[option])
	{
	  found = true;
	  break;
	}
    }
  if (!found)
    im->hbh_enabled = 0;

  return (0);
}

/* Global IP6 main. */
ip6_main_t ip6_main;

static clib_error_t *
ip6_lookup_init (vlib_main_t * vm)
{
  ip6_main_t *im = &ip6_main;
  clib_error_t *error;
  uword i;

  if ((error = vlib_call_init_function (vm, vnet_feature_init)))
    return error;

  for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
    {
      u32 j, i0, i1;

      i0 = i / 32;
      i1 = i % 32;

      for (j = 0; j < i0; j++)
	im->fib_masks[i].as_u32[j] = ~0;

      if (i1)
	im->fib_masks[i].as_u32[i0] =
	  clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
    }

  ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);

  if (im->lookup_table_nbuckets == 0)
    im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;

  im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);

  if (im->lookup_table_size == 0)
    im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;

  BV (clib_bihash_init) (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
			 "ip6 FIB fwding table",
			 im->lookup_table_nbuckets, im->lookup_table_size);
  BV (clib_bihash_init) (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
			 "ip6 FIB non-fwding table",
			 im->lookup_table_nbuckets, im->lookup_table_size);

  /* Create FIB with index 0 and table id of 0. */
  fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);
  mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0);

  {
    pg_node_t *pn;
    pn = pg_get_node (ip6_lookup_node.index);
    pn->unformat_edit = unformat_pg_ip6_header;
  }

  /* Unless explicitly configured, don't process HBH options */
  im->hbh_enabled = 0;

  {
    icmp6_neighbor_solicitation_header_t p;

    memset (&p, 0, sizeof (p));

    p.ip.ip_version_traffic_class_and_flow_label =
      clib_host_to_net_u32 (0x6 << 28);
    p.ip.payload_length =
      clib_host_to_net_u16 (sizeof (p) -
			    STRUCT_OFFSET_OF
			    (icmp6_neighbor_solicitation_header_t, neighbor));
    p.ip.protocol = IP_PROTOCOL_ICMP6;
    p.ip.hop_limit = 255;
    ip6_set_solicited_node_multicast_address (&p.ip.dst_address, 0);

    p.neighbor.icmp.type = ICMP6_neighbor_solicitation;

    p.link_layer_option.header.type =
      ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
    p.link_layer_option.header.n_data_u64s =
      sizeof (p.link_layer_option) / sizeof (u64);

    vlib_packet_template_init (vm,
			       &im->discover_neighbor_packet_template,
			       &p, sizeof (p),
			       /* alloc chunk size */ 8,
			       "ip6 neighbor discovery");
  }

  return error;
}

VLIB_INIT_FUNCTION (ip6_lookup_init);

static clib_error_t *
add_del_ip6_interface_table (vlib_main_t * vm,
			     unformat_input_t * input,
			     vlib_cli_command_t * cmd)
{
  vnet_main_t *vnm = vnet_get_main ();
  clib_error_t *error = 0;
  u32 sw_if_index, table_id;

  sw_if_index = ~0;

  if (!unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
    {
      error = clib_error_return (0, "unknown interface `%U'",
				 format_unformat_error, input);
      goto done;
    }

  if (unformat (input, "%d", &table_id))
    ;
  else
    {
      error = clib_error_return (0, "expected table id `%U'",
				 format_unformat_error, input);
      goto done;
    }

  {
    u32 fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
						       table_id);

    vec_validate (ip6_main.fib_index_by_sw_if_index, sw_if_index);
    ip6_main.fib_index_by_sw_if_index[sw_if_index] = fib_index;

    fib_index = mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
						    table_id);

    vec_validate (ip6_main.mfib_index_by_sw_if_index, sw_if_index);
    ip6_main.mfib_index_by_sw_if_index[sw_if_index] = fib_index;
  }


done:
  return error;
}

/*?
 * Place the indicated interface into the supplied IPv6 FIB table (also known
 * as a VRF). If the FIB table does not exist, this command creates it. To
 * display the current IPv6 FIB table, use the command '<em>show ip6 fib</em>'.
 * FIB table will only be displayed if a route has been added to the table, or
 * an IP Address is assigned to an interface in the table (which adds a route
 * automatically).
 *
 * @note IP addresses added after setting the interface IP table end up in
 * the indicated FIB table. If the IP address is added prior to adding the
 * interface to the FIB table, it will NOT be part of the FIB table. Predictable
 * but potentially counter-intuitive results occur if you provision interface
 * addresses in multiple FIBs. Upon RX, packets will be processed in the last
 * IP table ID provisioned. It might be marginally useful to evade source RPF
 * drops to put an interface address into multiple FIBs.
 *
 * @cliexpar
 * Example of how to add an interface to an IPv6 FIB table (where 2 is the table-id):
 * @cliexcmd{set interface ip6 table GigabitEthernet2/0/0 2}
 ?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_interface_ip6_table_command, static) =
{
  .path = "set interface ip6 table",
  .function = add_del_ip6_interface_table,
  .short_help = "set interface ip6 table <interface> <table-id>"
};
/* *INDENT-ON* */

void
ip6_link_local_address_from_ethernet_mac_address (ip6_address_t * ip,
						  u8 * mac)
{
  ip->as_u64[0] = clib_host_to_net_u64 (0xFE80000000000000ULL);
  /* Invert the "u" bit */
  ip->as_u8[8] = mac[0] ^ (1 << 1);
  ip->as_u8[9] = mac[1];
  ip->as_u8[10] = mac[2];
  ip->as_u8[11] = 0xFF;
  ip->as_u8[12] = 0xFE;
  ip->as_u8[13] = mac[3];
  ip->as_u8[14] = mac[4];
  ip->as_u8[15] = mac[5];
}

void
ip6_ethernet_mac_address_from_link_local_address (u8 * mac,
						  ip6_address_t * ip)
{
  /* Invert the previously inverted "u" bit */
  mac[0] = ip->as_u8[8] ^ (1 << 1);
  mac[1] = ip->as_u8[9];
  mac[2] = ip->as_u8[10];
  mac[3] = ip->as_u8[13];
  mac[4] = ip->as_u8[14];
  mac[5] = ip->as_u8[15];
}

static clib_error_t *
test_ip6_link_command_fn (vlib_main_t * vm,
			  unformat_input_t * input, vlib_cli_command_t * cmd)
{
  u8 mac[6];
  ip6_address_t _a, *a = &_a;

  if (unformat (input, "%U", unformat_ethernet_address, mac))
    {
      ip6_link_local_address_from_ethernet_mac_address (a, mac);
      vlib_cli_output (vm, "Link local address: %U", format_ip6_address, a);
      ip6_ethernet_mac_address_from_link_local_address (mac, a);
      vlib_cli_output (vm, "Original MAC address: %U",
		       format_ethernet_address, mac);
    }

  return 0;
}

/*?
 * This command converts the given MAC Address into an IPv6 link-local
 * address.
 *
 * @cliexpar
 * Example of how to create an IPv6 link-local address:
 * @cliexstart{test ip6 link 16:d9:e0:91:79:86}
 * Link local address: fe80::14d9:e0ff:fe91:7986
 * Original MAC address: 16:d9:e0:91:79:86
 * @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (test_link_command, static) =
{
  .path = "test ip6 link",
  .function = test_ip6_link_command_fn,
  .short_help = "test ip6 link <mac-address>",
};
/* *INDENT-ON* */

int
vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
{
  ip6_main_t *im6 = &ip6_main;
  ip6_fib_t *fib;
  uword *p = hash_get (im6->fib_index_by_table_id, table_id);

  if (p == 0)
    return -1;

  fib = ip6_fib_get (p[0]);

  fib->flow_hash_config = flow_hash_config;
  return 1;
}

static clib_error_t *
set_ip6_flow_hash_command_fn (vlib_main_t * vm,
			      unformat_input_t * input,
			      vlib_cli_command_t * cmd)
{
  int matched = 0;
  u32 table_id = 0;
  u32 flow_hash_config = 0;
  int rv;

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "table %d", &table_id))
	matched = 1;
#define _(a,v) \
    else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
      foreach_flow_hash_bit
#undef _
	else
	break;
    }

  if (matched == 0)
    return clib_error_return (0, "unknown input `%U'",
			      format_unformat_error, input);

  rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
  switch (rv)
    {
    case 1:
      break;

    case -1:
      return clib_error_return (0, "no such FIB table %d", table_id);

    default:
      clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
      break;
    }

  return 0;
}

/*?
 * Configure the set of IPv6 fields used by the flow hash.
 *
 * @cliexpar
 * @parblock
 * Example of how to set the flow hash on a given table:
 * @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
 *
 * Example of display the configured flow hash:
 * @cliexstart{show ip6 fib}
 * ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
 * @::/0
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
 *     [0] [@0]: dpo-drop ip6
 * fe80::/10
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ff02::1/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ff02::2/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ff02::16/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ff02::1:ff00:0/104
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
 * @::/0
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
 *     [0] [@0]: dpo-drop ip6
 * @::a:1:1:0:4/126
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
 *     [0] [@4]: ipv6-glean: af_packet0
 * @::a:1:1:0:7/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
 *     [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
 * fe80::/10
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * fe80::fe:3eff:fe3e:9222/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
 *     [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
 * ff02::1/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ff02::2/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ff02::16/128
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * ff02::1:ff00:0/104
 *   unicast-ip6-chain
 *   [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
 *     [0] [@2]: dpo-receive
 * @cliexend
 * @endparblock
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
{
  .path = "set ip6 flow-hash",
  .short_help =
  "set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
  .function = set_ip6_flow_hash_command_fn,
};
/* *INDENT-ON* */

static clib_error_t *
show_ip6_local_command_fn (vlib_main_t * vm,
			   unformat_input_t * input, vlib_cli_command_t * cmd)
{
  ip6_main_t *im = &ip6_main;
  ip_lookup_main_t *lm = &im->lookup_main;
  int i;

  vlib_cli_output (vm, "Protocols handled by ip6_local");
  for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
    {
      if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
	vlib_cli_output (vm, "%d", i);
    }
  return 0;
}



/*?
 * Display the set of protocols handled by the local IPv6 stack.
 *
 * @cliexpar
 * Example of how to display local protocol table:
 * @cliexstart{show ip6 local}
 * Protocols handled by ip6_local
 * 17
 * 43
 * 58
 * 115
 * @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_ip6_local, static) =
{
  .path = "show ip6 local",
  .function = show_ip6_local_command_fn,
  .short_help = "show ip6 local",
};
/* *INDENT-ON* */

int
vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
			     u32 table_index)
{
  vnet_main_t *vnm = vnet_get_main ();
  vnet_interface_main_t *im = &vnm->interface_main;
  ip6_main_t *ipm = &ip6_main;
  ip_lookup_main_t *lm = &ipm->lookup_main;
  vnet_classify_main_t *cm = &vnet_classify_main;
  ip6_address_t *if_addr;

  if (pool_is_free_index (im->sw_interfaces, sw_if_index))
    return VNET_API_ERROR_NO_MATCHING_INTERFACE;

  if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
    return VNET_API_ERROR_NO_SUCH_ENTRY;

  vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
  lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;

  if_addr = ip6_interface_first_address (ipm, sw_if_index, NULL);

  if (NULL != if_addr)
    {
      fib_prefix_t pfx = {
	.fp_len = 128,
	.fp_proto = FIB_PROTOCOL_IP6,
	.fp_addr.ip6 = *if_addr,
      };
      u32 fib_index;

      fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
						       sw_if_index);


      if (table_index != (u32) ~ 0)
	{
	  dpo_id_t dpo = DPO_INVALID;

	  dpo_set (&dpo,
		   DPO_CLASSIFY,
		   DPO_PROTO_IP6,
		   classify_dpo_create (DPO_PROTO_IP6, table_index));

	  fib_table_entry_special_dpo_add (fib_index,
					   &pfx,
					   FIB_SOURCE_CLASSIFY,
					   FIB_ENTRY_FLAG_NONE, &dpo);
	  dpo_reset (&dpo);
	}
      else
	{
	  fib_table_entry_special_remove (fib_index,
					  &pfx, FIB_SOURCE_CLASSIFY);
	}
    }

  return 0;
}

static clib_error_t *
set_ip6_classify_command_fn (vlib_main_t * vm,
			     unformat_input_t * input,
			     vlib_cli_command_t * cmd)
{
  u32 table_index = ~0;
  int table_index_set = 0;
  u32 sw_if_index = ~0;
  int rv;

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "table-index %d", &table_index))
	table_index_set = 1;
      else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
			 vnet_get_main (), &sw_if_index))
	;
      else
	break;
    }

  if (table_index_set == 0)
    return clib_error_return (0, "classify table-index must be specified");

  if (sw_if_index == ~0)
    return clib_error_return (0, "interface / subif must be specified");

  rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);

  switch (rv)
    {
    case 0:
      break;

    case VNET_API_ERROR_NO_MATCHING_INTERFACE:
      return clib_error_return (0, "No such interface");

    case VNET_API_ERROR_NO_SUCH_ENTRY:
      return clib_error_return (0, "No such classifier table");
    }
  return 0;
}

/*?
 * Assign a classification table to an interface. The classification
 * table is created using the '<em>classify table</em>' and '<em>classify session</em>'
 * commands. Once the table is create, use this command to filter packets
 * on an interface.
 *
 * @cliexpar
 * Example of how to assign a classification table to an interface:
 * @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
{
  .path = "set ip6 classify",
  .short_help =
  "set ip6 classify intfc <interface> table-index <classify-idx>",
  .function = set_ip6_classify_command_fn,
};
/* *INDENT-ON* */

static clib_error_t *
ip6_config (vlib_main_t * vm, unformat_input_t * input)
{
  ip6_main_t *im = &ip6_main;
  uword heapsize = 0;
  u32 tmp;
  u32 nbuckets = 0;

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "hash-buckets %d", &tmp))
	nbuckets = tmp;
      else if (unformat (input, "heap-size %dm", &tmp))
	heapsize = ((u64) tmp) << 20;
      else if (unformat (input, "heap-size %dM", &tmp))
	heapsize = ((u64) tmp) << 20;
      else if (unformat (input, "heap-size %dg", &tmp))
	heapsize = ((u64) tmp) << 30;
      else if (unformat (input, "heap-size %dG", &tmp))
	heapsize = ((u64) tmp) << 30;
      else
	return clib_error_return (0, "unknown input '%U'",
				  format_unformat_error, input);
    }

  im->lookup_table_nbuckets = nbuckets;
  im->lookup_table_size = heapsize;

  return 0;
}

VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */