summaryrefslogtreecommitdiffstats
path: root/src/vnet/ethernet/node.c
blob: f216216d3d7853dff814027e83d5b827300469d5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88

@media only all and (prefers-color-scheme: dark) {
.highlight .hll { background-color: #49483e }
.highlight .c { color: #75715e } /* Comment */
.highlight .err { color: #960050; background-color: #1e0010 } /* Error */
.highlight .k { color: #66d9ef } /* Keyword */
.highlight .l { color: #ae81ff } /* Literal */
.highlight .n { color: #f8f8f2 } /* Name */
.highlight .o { color: #f92672 } /* Operator */
.highlight .p { color: #f8f8f2 } /* Punctuation */
.highlight .ch { color: #75715e } /* Comment.Hashbang */
.highlight .cm { color: #75715e } /* Comment.Multiline */
.highlight .cp { color: #75715e } /* Comment.Preproc */
.highlight .cpf { color: #75715e } /* Comment.PreprocFile */
.highlight .c1 { color: #75715e } /* Comment.Single */
.highlight .cs { color: #75715e } /* Comment.Special */
.highlight .gd { color: #f92672 } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gi { color: #a6e22e } /* Generic.Inserted */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #75715e } /* Generic.Subheading */
.highlight .kc { color: #66d9ef } /* Keyword.Constant */
.highlight .kd { color: #66d9ef } /* Keyword.Declaration */
.highlight .kn { color: #f92672 } /* Keyword.Namespace */
.highlight .kp { color: #66d9ef } /* Keyword.Pseudo */
.highlight .kr { color: #66d9ef } /* Keyword.Reserved */
.highlight .kt { color: #66d9ef } /* Keyword.Type */
.highlight .ld { color: #e6db74 } /* Literal.Date */
.highlight .m { color: #ae81ff } /* Literal.Number */
.highlight .s { color: #e6db74 } /* Literal.String */
.highlight .na { color: #a6e22e } /* Name.Attribute */
.highlight .nb { color: #f8f8f2 } /* Name.Builtin */
.highlight .nc { color: #a6e22e } /* Name.Class */
.highlight .no { color: #66d9ef } /* Name.Constant */
.highlight .nd { color: #a6e22e } /* Name.Decorator */
.highlight .ni { color: #f8f8f2 } /* Name.Entity */
.highlight .ne { color: #a6e22e } /* Name.Exception */
.highlight .nf { color: #a6e22e } /* Name.Function */
.highlight .nl { color: #f8f8f2 } /* Name.Label */
.highlight .nn { color: #f8f8f2 } /* Name.Namespace */
.highlight .nx { color: #a6e22e } /* Name.Other */
.highlight .py { color: #f8f8f2 } /* Name.Property */
.highlight .nt { color: #f92672 } /* Name.Tag */
.highlight .nv { color: #f8f8f2 } /* Name.Variable */
.highlight .ow { color: #f92672 } /* Operator.Word */
.highlight .w { color: #f8f8f2 } /* Text.Whitespace */
.highlight .mb { color: #ae81ff } /* Literal.Number.Bin */
.highlight .mf { color: #ae81ff } /* Literal.Number.Float */
.highlight .mh { color: #ae81ff } /* Literal.Number.Hex */
.highlight .mi { color: #ae81ff } /* Literal.Number.Integer */
.highlight .mo { color: #ae81ff } /* Literal.Number.Oct */
.highlight .sa { color: #e6db74 } /* Literal.String.Affix */
.highlight .sb { color: #e6db74 } /* Literal.String.Backtick */
.highlight .sc { color: #e6db74 } /* Literal.String.Char */
.highlight .dl { color: #e6db74 } /* Literal.String.Delimiter */
.highlight .sd { color: #e6db74 } /* Literal.String.Doc */
.highlight .s2 { color: #e6db74 } /* Literal.String.Double */
.highlight .se { color: #ae81ff } /* Literal.String.Escape */
.highlight .sh { color: #e6db74 } /* Literal.String.Heredoc */
.highlight .si { color: #e6db74 } /* Literal.String.Interpol */
.highlight .sx { color: #e6db74 } /* Literal.String.Other */
.highlight .sr { color: #e6db74 } /* Literal.String.Regex */
.highlight .s1 { color: #e6db74 } /* Literal.String.Single */
.highlight .ss { color: #e6db74 } /* Literal.String.Symbol */
.highlight .bp { color: #f8f8f2 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #a6e22e } /* Name.Function.Magic */
.highlight .vc { color: #f8f8f2 } /* Name.Variable.Class */
.highlight .vg { color: #f8f8f2 } /* Name.Variable.Global */
.highlight .vi { color: #f8f8f2 } /* Name.Variable.Instance */
.highlight .vm { color: #f8f8f2 } /* Name.Variable.Magic */
.highlight .il { color: #ae81ff } /* Literal.Number.Integer.Long */
}
@media (prefers-color-scheme: light) {
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
}
/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef __included_srv6_ad_h__
#define __included_srv6_ad_h__

#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/srv6/sr.h>
#include <vnet/srv6/sr_packet.h>

#include <vppinfra/error.h>
#include <vppinfra/elog.h>

#define AD_TYPE_L2	2
#define AD_TYPE_IP4	4
#define AD_TYPE_IP6	6

/*
 * This is the memory that will be stored per each localsid
 * the user instantiates
 */
typedef struct
{
  ip46_address_t nh_addr;			  /**< Proxied device address */
  u32 sw_if_index_out;						    /**< Outgoing iface to proxied dev. */
  u32 nh_adj;									/**< Adjacency index for out. iface */
  u8 inner_type;

  u32 sw_if_index_in;						    /**< Incoming iface from proxied dev. */
  u32 rw_len;		      /**< Number of bits to be rewritten */
  u8 *rewrite;								/**< Headers to be rewritten */

  u32 index;
} srv6_ad_localsid_t;

typedef struct
{
  u16 msg_id_base;			  /**< API message ID base */

  vlib_main_t *vlib_main;		  /**< [convenience] vlib main */
  vnet_main_t *vnet_main;		  /**< [convenience] vnet main */

  dpo_type_t srv6_ad_dpo_type;		  /**< DPO type */

  u32 srv6_localsid_behavior_id;	  /**< SRv6 LocalSID behavior number */

  u32 *sw_iface_localsid2;		  /**< Retrieve local SID from iface */
  u32 *sw_iface_localsid4;		  /**< Retrieve local SID from iface */
  u32 *sw_iface_localsid6;		  /**< Retrieve local SID from iface */

  srv6_ad_localsid_t **sids;	/**< Pool of AD SID pointers */

  vlib_combined_counter_main_t valid_counters;	/**< Valid rewrite counters */
  vlib_combined_counter_main_t invalid_counters;/**< Invalid rewrite counters */
} srv6_ad_main_t;

srv6_ad_main_t srv6_ad_main;

format_function_t format_srv6_ad_localsid;
unformat_function_t unformat_srv6_ad_localsid;

void srv6_ad_dpo_lock (dpo_id_t * dpo);
void srv6_ad_dpo_unlock (dpo_id_t * dpo);

extern vlib_node_registration_t srv6_ad_localsid_node;

#endif /* __included_srv6_ad_h__ */

/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
ref='#n575'>575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * ethernet_node.c: ethernet packet processing
 *
 * 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 <vlib/vlib.h>
#include <vnet/pg/pg.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ethernet/p2p_ethernet.h>
#include <vppinfra/sparse_vec.h>
#include <vnet/l2/l2_bvi.h>


#define foreach_ethernet_input_next		\
  _ (PUNT, "error-punt")			\
  _ (DROP, "error-drop")			\
  _ (LLC, "llc-input")

typedef enum
{
#define _(s,n) ETHERNET_INPUT_NEXT_##s,
  foreach_ethernet_input_next
#undef _
    ETHERNET_INPUT_N_NEXT,
} ethernet_input_next_t;

typedef struct
{
  u8 packet_data[32];
} ethernet_input_trace_t;

static u8 *
format_ethernet_input_trace (u8 * s, va_list * va)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
  ethernet_input_trace_t *t = va_arg (*va, ethernet_input_trace_t *);

  s = format (s, "%U", format_ethernet_header, t->packet_data);

  return s;
}

vlib_node_registration_t ethernet_input_node;

typedef enum
{
  ETHERNET_INPUT_VARIANT_ETHERNET,
  ETHERNET_INPUT_VARIANT_ETHERNET_TYPE,
  ETHERNET_INPUT_VARIANT_NOT_L2,
} ethernet_input_variant_t;


// Parse the ethernet header to extract vlan tags and innermost ethertype
static_always_inline void
parse_header (ethernet_input_variant_t variant,
	      vlib_buffer_t * b0,
	      u16 * type,
	      u16 * orig_type,
	      u16 * outer_id, u16 * inner_id, u32 * match_flags)
{
  u8 vlan_count;

  if (variant == ETHERNET_INPUT_VARIANT_ETHERNET
      || variant == ETHERNET_INPUT_VARIANT_NOT_L2)
    {
      ethernet_header_t *e0;

      e0 = (void *) (b0->data + b0->current_data);

      vnet_buffer (b0)->l2_hdr_offset = b0->current_data;

      vlib_buffer_advance (b0, sizeof (e0[0]));

      *type = clib_net_to_host_u16 (e0->type);
    }
  else if (variant == ETHERNET_INPUT_VARIANT_ETHERNET_TYPE)
    {
      // here when prior node was LLC/SNAP processing
      u16 *e0;

      e0 = (void *) (b0->data + b0->current_data);

      vlib_buffer_advance (b0, sizeof (e0[0]));

      *type = clib_net_to_host_u16 (e0[0]);
    }

  // save for distinguishing between dot1q and dot1ad later
  *orig_type = *type;

  // default the tags to 0 (used if there is no corresponding tag)
  *outer_id = 0;
  *inner_id = 0;

  *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_0_TAG;
  vlan_count = 0;

  // check for vlan encaps
  if (ethernet_frame_is_tagged (*type))
    {
      ethernet_vlan_header_t *h0;
      u16 tag;

      *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_1_TAG;

      h0 = (void *) (b0->data + b0->current_data);

      tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);

      *outer_id = tag & 0xfff;
      if (0 == *outer_id)
	*match_flags &= ~SUBINT_CONFIG_MATCH_1_TAG;

      *type = clib_net_to_host_u16 (h0->type);

      vlib_buffer_advance (b0, sizeof (h0[0]));
      vlan_count = 1;

      if (*type == ETHERNET_TYPE_VLAN)
	{
	  // Double tagged packet
	  *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_2_TAG;

	  h0 = (void *) (b0->data + b0->current_data);

	  tag = clib_net_to_host_u16 (h0->priority_cfi_and_id);

	  *inner_id = tag & 0xfff;

	  *type = clib_net_to_host_u16 (h0->type);

	  vlib_buffer_advance (b0, sizeof (h0[0]));
	  vlan_count = 2;
	  if (*type == ETHERNET_TYPE_VLAN)
	    {
	      // More than double tagged packet
	      *match_flags = SUBINT_CONFIG_VALID | SUBINT_CONFIG_MATCH_3_TAG;

	      vlib_buffer_advance (b0, sizeof (h0[0]));
	      vlan_count = 3;	// "unknown" number, aka, 3-or-more
	    }
	}
    }
  ethernet_buffer_set_vlan_count (b0, vlan_count);
}

// Determine the subinterface for this packet, given the result of the
// vlan table lookups and vlan header parsing. Check the most specific
// matches first.
static_always_inline void
identify_subint (vnet_hw_interface_t * hi,
		 vlib_buffer_t * b0,
		 u32 match_flags,
		 main_intf_t * main_intf,
		 vlan_intf_t * vlan_intf,
		 qinq_intf_t * qinq_intf,
		 u32 * new_sw_if_index, u8 * error0, u32 * is_l2)
{
  u32 matched;

  matched = eth_identify_subint (hi, b0, match_flags,
				 main_intf, vlan_intf, qinq_intf,
				 new_sw_if_index, error0, is_l2);

  if (matched)
    {

      // Perform L3 my-mac filter
      // A unicast packet arriving on an L3 interface must have a dmac matching the interface mac.
      // This is required for promiscuous mode, else we will forward packets we aren't supposed to.
      if (!(*is_l2))
	{
	  ethernet_header_t *e0;
	  e0 = (void *) (b0->data + vnet_buffer (b0)->l2_hdr_offset);

	  if (!(ethernet_address_cast (e0->dst_address)))
	    {
	      if (!eth_mac_equal ((u8 *) e0, hi->hw_address))
		{
		  *error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
		}
	    }
	}

      // Check for down subinterface
      *error0 = (*new_sw_if_index) != ~0 ? (*error0) : ETHERNET_ERROR_DOWN;
    }
}

static_always_inline void
determine_next_node (ethernet_main_t * em,
		     ethernet_input_variant_t variant,
		     u32 is_l20,
		     u32 type0, vlib_buffer_t * b0, u8 * error0, u8 * next0)
{
  if (PREDICT_FALSE (*error0 != ETHERNET_ERROR_NONE))
    {
      // some error occurred
      *next0 = ETHERNET_INPUT_NEXT_DROP;
    }
  else if (is_l20)
    {
      *next0 = em->l2_next;
      // record the L2 len and reset the buffer so the L2 header is preserved
      u32 eth_start = vnet_buffer (b0)->l2_hdr_offset;
      vnet_buffer (b0)->l2.l2_len = b0->current_data - eth_start;
      ASSERT (vnet_buffer (b0)->l2.l2_len ==
	      ethernet_buffer_header_size (b0));
      vlib_buffer_advance (b0, -ethernet_buffer_header_size (b0));

      // check for common IP/MPLS ethertypes
    }
  else if (type0 == ETHERNET_TYPE_IP4)
    {
      *next0 = em->l3_next.input_next_ip4;
    }
  else if (type0 == ETHERNET_TYPE_IP6)
    {
      *next0 = em->l3_next.input_next_ip6;
    }
  else if (type0 == ETHERNET_TYPE_MPLS)
    {
      *next0 = em->l3_next.input_next_mpls;

    }
  else if (em->redirect_l3)
    {
      // L3 Redirect is on, the cached common next nodes will be
      // pointing to the redirect node, catch the uncommon types here
      *next0 = em->redirect_l3_next;
    }
  else
    {
      // uncommon ethertype, check table
      u32 i0;
      i0 = sparse_vec_index (em->l3_next.input_next_by_type, type0);
      *next0 = vec_elt (em->l3_next.input_next_by_type, i0);
      *error0 =
	i0 ==
	SPARSE_VEC_INVALID_INDEX ? ETHERNET_ERROR_UNKNOWN_TYPE : *error0;

      // The table is not populated with LLC values, so check that now.
      // If variant is variant_ethernet then we came from LLC processing. Don't
      // go back there; drop instead using by keeping the drop/bad table result.
      if ((type0 < 0x600) && (variant == ETHERNET_INPUT_VARIANT_ETHERNET))
	{
	  *next0 = ETHERNET_INPUT_NEXT_LLC;
	}
    }
}

static_always_inline int
ethernet_frame_is_any_tagged (u16 type0, u16 type1)
{
#if __SSE4_2__
  const __m128i ethertype_mask = _mm_set_epi16 (ETHERNET_TYPE_VLAN,
						ETHERNET_TYPE_DOT1AD,
						ETHERNET_TYPE_VLAN_9100,
						ETHERNET_TYPE_VLAN_9200,
						/* duplicate for type1 */
						ETHERNET_TYPE_VLAN,
						ETHERNET_TYPE_DOT1AD,
						ETHERNET_TYPE_VLAN_9100,
						ETHERNET_TYPE_VLAN_9200);

  __m128i r =
    _mm_set_epi16 (type0, type0, type0, type0, type1, type1, type1, type1);
  r = _mm_cmpeq_epi16 (ethertype_mask, r);
  return !_mm_test_all_zeros (r, r);
#else
  return ethernet_frame_is_tagged (type0) || ethernet_frame_is_tagged (type1);
#endif
}

static_always_inline uword
ethernet_input_inline (vlib_main_t * vm,
		       vlib_node_runtime_t * node,
		       vlib_frame_t * from_frame,
		       ethernet_input_variant_t variant)
{
  vnet_main_t *vnm = vnet_get_main ();
  ethernet_main_t *em = &ethernet_main;
  vlib_node_runtime_t *error_node;
  u32 n_left_from, next_index, *from, *to_next;
  u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
  u32 thread_index = vlib_get_thread_index ();
  u32 cached_sw_if_index = ~0;
  u32 cached_is_l2 = 0;		/* shut up gcc */
  vnet_hw_interface_t *hi = NULL;	/* used for main interface only */

  if (variant != ETHERNET_INPUT_VARIANT_ETHERNET)
    error_node = vlib_node_get_runtime (vm, ethernet_input_node.index);
  else
    error_node = node;

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

  if (node->flags & VLIB_NODE_FLAG_TRACE)
    vlib_trace_frame_buffers_only (vm, node,
				   from,
				   n_left_from,
				   sizeof (from[0]),
				   sizeof (ethernet_input_trace_t));

  next_index = node->cached_next_index;
  stats_sw_if_index = node->runtime_data[0];
  stats_n_packets = stats_n_bytes = 0;

  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;
	  u8 next0, next1, error0, error1;
	  u16 type0, orig_type0, type1, orig_type1;
	  u16 outer_id0, inner_id0, outer_id1, inner_id1;
	  u32 match_flags0, match_flags1;
	  u32 old_sw_if_index0, new_sw_if_index0, len0, old_sw_if_index1,
	    new_sw_if_index1, len1;
	  vnet_hw_interface_t *hi0, *hi1;
	  main_intf_t *main_intf0, *main_intf1;
	  vlan_intf_t *vlan_intf0, *vlan_intf1;
	  qinq_intf_t *qinq_intf0, *qinq_intf1;
	  u32 is_l20, is_l21;
	  ethernet_header_t *e0, *e1;

	  /* Prefetch next iteration. */
	  {
	    vlib_buffer_t *b2, *b3;

	    b2 = vlib_get_buffer (vm, from[2]);
	    b3 = vlib_get_buffer (vm, from[3]);

	    vlib_prefetch_buffer_header (b2, STORE);
	    vlib_prefetch_buffer_header (b3, STORE);

	    CLIB_PREFETCH (b2->data, sizeof (ethernet_header_t), LOAD);
	    CLIB_PREFETCH (b3->data, sizeof (ethernet_header_t), LOAD);
	  }

	  bi0 = from[0];
	  bi1 = from[1];
	  to_next[0] = bi0;
	  to_next[1] = bi1;
	  from += 2;
	  to_next += 2;
	  n_left_to_next -= 2;
	  n_left_from -= 2;

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

	  error0 = error1 = ETHERNET_ERROR_NONE;
	  e0 = vlib_buffer_get_current (b0);
	  type0 = clib_net_to_host_u16 (e0->type);
	  e1 = vlib_buffer_get_current (b1);
	  type1 = clib_net_to_host_u16 (e1->type);

	  /* Speed-path for the untagged case */
	  if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
			    && !ethernet_frame_is_any_tagged (type0, type1)))
	    {
	      main_intf_t *intf0;
	      subint_config_t *subint0;
	      u32 sw_if_index0, sw_if_index1;

	      sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
	      sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
	      is_l20 = cached_is_l2;

	      /* This is probably wholly unnecessary */
	      if (PREDICT_FALSE (sw_if_index0 != sw_if_index1))
		goto slowpath;

	      /* Now sw_if_index0 == sw_if_index1  */
	      if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
		{
		  cached_sw_if_index = sw_if_index0;
		  hi = vnet_get_sup_hw_interface (vnm, sw_if_index0);
		  intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
		  subint0 = &intf0->untagged_subint;
		  cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
		}

	      vnet_buffer (b0)->l2_hdr_offset = b0->current_data;
	      vnet_buffer (b1)->l2_hdr_offset = b1->current_data;

	      if (PREDICT_TRUE (is_l20 != 0))
		{
		  next0 = em->l2_next;
		  vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
		  next1 = em->l2_next;
		  vnet_buffer (b1)->l2.l2_len = sizeof (ethernet_header_t);
		}
	      else
		{
		  if (!ethernet_address_cast (e0->dst_address) &&
		      (hi->hw_address != 0) &&
		      !eth_mac_equal ((u8 *) e0, hi->hw_address))
		    error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
		  if (!ethernet_address_cast (e1->dst_address) &&
		      (hi->hw_address != 0) &&
		      !eth_mac_equal ((u8 *) e1, hi->hw_address))
		    error1 = ETHERNET_ERROR_L3_MAC_MISMATCH;
		  determine_next_node (em, variant, 0, type0, b0,
				       &error0, &next0);
		  vlib_buffer_advance (b0, sizeof (ethernet_header_t));
		  determine_next_node (em, variant, 0, type1, b1,
				       &error1, &next1);
		  vlib_buffer_advance (b1, sizeof (ethernet_header_t));
		}
	      goto ship_it01;
	    }

	  /* Slow-path for the tagged case */
	slowpath:
	  parse_header (variant,
			b0,
			&type0,
			&orig_type0, &outer_id0, &inner_id0, &match_flags0);

	  parse_header (variant,
			b1,
			&type1,
			&orig_type1, &outer_id1, &inner_id1, &match_flags1);

	  old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
	  old_sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];

	  eth_vlan_table_lookups (em,
				  vnm,
				  old_sw_if_index0,
				  orig_type0,
				  outer_id0,
				  inner_id0,
				  &hi0,
				  &main_intf0, &vlan_intf0, &qinq_intf0);

	  eth_vlan_table_lookups (em,
				  vnm,
				  old_sw_if_index1,
				  orig_type1,
				  outer_id1,
				  inner_id1,
				  &hi1,
				  &main_intf1, &vlan_intf1, &qinq_intf1);

	  identify_subint (hi0,
			   b0,
			   match_flags0,
			   main_intf0,
			   vlan_intf0,
			   qinq_intf0, &new_sw_if_index0, &error0, &is_l20);

	  identify_subint (hi1,
			   b1,
			   match_flags1,
			   main_intf1,
			   vlan_intf1,
			   qinq_intf1, &new_sw_if_index1, &error1, &is_l21);

	  // Save RX sw_if_index for later nodes
	  vnet_buffer (b0)->sw_if_index[VLIB_RX] =
	    error0 !=
	    ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;
	  vnet_buffer (b1)->sw_if_index[VLIB_RX] =
	    error1 !=
	    ETHERNET_ERROR_NONE ? old_sw_if_index1 : new_sw_if_index1;

	  // Check if there is a stat to take (valid and non-main sw_if_index for pkt 0 or pkt 1)
	  if (((new_sw_if_index0 != ~0)
	       && (new_sw_if_index0 != old_sw_if_index0))
	      || ((new_sw_if_index1 != ~0)
		  && (new_sw_if_index1 != old_sw_if_index1)))
	    {

	      len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
		- vnet_buffer (b0)->l2_hdr_offset;
	      len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
		- vnet_buffer (b1)->l2_hdr_offset;

	      stats_n_packets += 2;
	      stats_n_bytes += len0 + len1;

	      if (PREDICT_FALSE
		  (!(new_sw_if_index0 == stats_sw_if_index
		     && new_sw_if_index1 == stats_sw_if_index)))
		{
		  stats_n_packets -= 2;
		  stats_n_bytes -= len0 + len1;

		  if (new_sw_if_index0 != old_sw_if_index0
		      && new_sw_if_index0 != ~0)
		    vlib_increment_combined_counter (vnm->
						     interface_main.combined_sw_if_counters
						     +
						     VNET_INTERFACE_COUNTER_RX,
						     thread_index,
						     new_sw_if_index0, 1,
						     len0);
		  if (new_sw_if_index1 != old_sw_if_index1
		      && new_sw_if_index1 != ~0)
		    vlib_increment_combined_counter (vnm->
						     interface_main.combined_sw_if_counters
						     +
						     VNET_INTERFACE_COUNTER_RX,
						     thread_index,
						     new_sw_if_index1, 1,
						     len1);

		  if (new_sw_if_index0 == new_sw_if_index1)
		    {
		      if (stats_n_packets > 0)
			{
			  vlib_increment_combined_counter
			    (vnm->interface_main.combined_sw_if_counters
			     + VNET_INTERFACE_COUNTER_RX,
			     thread_index,
			     stats_sw_if_index,
			     stats_n_packets, stats_n_bytes);
			  stats_n_packets = stats_n_bytes = 0;
			}
		      stats_sw_if_index = new_sw_if_index0;
		    }
		}
	    }

	  if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
	    is_l20 = is_l21 = 0;

	  determine_next_node (em, variant, is_l20, type0, b0, &error0,
			       &next0);
	  determine_next_node (em, variant, is_l21, type1, b1, &error1,
			       &next1);

	ship_it01:
	  b0->error = error_node->errors[error0];
	  b1->error = error_node->errors[error1];

	  // verify speculative enqueue
	  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;
	  u8 error0, next0;
	  u16 type0, orig_type0;
	  u16 outer_id0, inner_id0;
	  u32 match_flags0;
	  u32 old_sw_if_index0, new_sw_if_index0, len0;
	  vnet_hw_interface_t *hi0;
	  main_intf_t *main_intf0;
	  vlan_intf_t *vlan_intf0;
	  qinq_intf_t *qinq_intf0;
	  ethernet_header_t *e0;
	  u32 is_l20;

	  // Prefetch next iteration
	  if (n_left_from > 1)
	    {
	      vlib_buffer_t *p2;

	      p2 = vlib_get_buffer (vm, from[1]);
	      vlib_prefetch_buffer_header (p2, STORE);
	      CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
	    }

	  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);

	  error0 = ETHERNET_ERROR_NONE;
	  e0 = vlib_buffer_get_current (b0);
	  type0 = clib_net_to_host_u16 (e0->type);

	  /* Speed-path for the untagged case */
	  if (PREDICT_TRUE (variant == ETHERNET_INPUT_VARIANT_ETHERNET
			    && !ethernet_frame_is_tagged (type0)))
	    {
	      main_intf_t *intf0;
	      subint_config_t *subint0;
	      u32 sw_if_index0;

	      sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
	      is_l20 = cached_is_l2;

	      if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
		{
		  cached_sw_if_index = sw_if_index0;
		  hi = vnet_get_sup_hw_interface (vnm, sw_if_index0);
		  intf0 = vec_elt_at_index (em->main_intfs, hi->hw_if_index);
		  subint0 = &intf0->untagged_subint;
		  cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
		}

	      vnet_buffer (b0)->l2_hdr_offset = b0->current_data;

	      if (PREDICT_TRUE (is_l20 != 0))
		{
		  next0 = em->l2_next;
		  vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
		}
	      else
		{
		  if (!ethernet_address_cast (e0->dst_address) &&
		      (hi->hw_address != 0) &&
		      !eth_mac_equal ((u8 *) e0, hi->hw_address))
		    error0 = ETHERNET_ERROR_L3_MAC_MISMATCH;
		  determine_next_node (em, variant, 0, type0, b0,
				       &error0, &next0);
		  vlib_buffer_advance (b0, sizeof (ethernet_header_t));
		}
	      goto ship_it0;
	    }

	  /* Slow-path for the tagged case */
	  parse_header (variant,
			b0,
			&type0,
			&orig_type0, &outer_id0, &inner_id0, &match_flags0);

	  old_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];

	  eth_vlan_table_lookups (em,
				  vnm,
				  old_sw_if_index0,
				  orig_type0,
				  outer_id0,
				  inner_id0,
				  &hi0,
				  &main_intf0, &vlan_intf0, &qinq_intf0);

	  identify_subint (hi0,
			   b0,
			   match_flags0,
			   main_intf0,
			   vlan_intf0,
			   qinq_intf0, &new_sw_if_index0, &error0, &is_l20);

	  // Save RX sw_if_index for later nodes
	  vnet_buffer (b0)->sw_if_index[VLIB_RX] =
	    error0 !=
	    ETHERNET_ERROR_NONE ? old_sw_if_index0 : new_sw_if_index0;

	  // Increment subinterface stats
	  // Note that interface-level counters have already been incremented
	  // prior to calling this function. Thus only subinterface counters
	  // are incremented here.
	  //
	  // Interface level counters include packets received on the main
	  // interface and all subinterfaces. Subinterface level counters
	  // include only those packets received on that subinterface
	  // Increment stats if the subint is valid and it is not the main intf
	  if ((new_sw_if_index0 != ~0)
	      && (new_sw_if_index0 != old_sw_if_index0))
	    {

	      len0 = vlib_buffer_length_in_chain (vm, b0) + b0->current_data
		- vnet_buffer (b0)->l2_hdr_offset;

	      stats_n_packets += 1;
	      stats_n_bytes += len0;

	      // Batch stat increments from the same subinterface so counters
	      // don't need to be incremented for every packet.
	      if (PREDICT_FALSE (new_sw_if_index0 != stats_sw_if_index))
		{
		  stats_n_packets -= 1;
		  stats_n_bytes -= len0;

		  if (new_sw_if_index0 != ~0)
		    vlib_increment_combined_counter
		      (vnm->interface_main.combined_sw_if_counters
		       + VNET_INTERFACE_COUNTER_RX,
		       thread_index, new_sw_if_index0, 1, len0);
		  if (stats_n_packets > 0)
		    {
		      vlib_increment_combined_counter
			(vnm->interface_main.combined_sw_if_counters
			 + VNET_INTERFACE_COUNTER_RX,
			 thread_index,
			 stats_sw_if_index, stats_n_packets, stats_n_bytes);
		      stats_n_packets = stats_n_bytes = 0;
		    }
		  stats_sw_if_index = new_sw_if_index0;
		}
	    }

	  if (variant == ETHERNET_INPUT_VARIANT_NOT_L2)
	    is_l20 = 0;

	  determine_next_node (em, variant, is_l20, type0, b0, &error0,
			       &next0);

	ship_it0:
	  b0->error = error_node->errors[error0];

	  // verify speculative enqueue
	  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);
    }

  // Increment any remaining batched stats
  if (stats_n_packets > 0)
    {
      vlib_increment_combined_counter
	(vnm->interface_main.combined_sw_if_counters
	 + VNET_INTERFACE_COUNTER_RX,
	 thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
      node->runtime_data[0] = stats_sw_if_index;
    }

  return from_frame->n_vectors;
}

static uword
ethernet_input (vlib_main_t * vm,
		vlib_node_runtime_t * node, vlib_frame_t * from_frame)
{
  return ethernet_input_inline (vm, node, from_frame,
				ETHERNET_INPUT_VARIANT_ETHERNET);
}

static uword
ethernet_input_type (vlib_main_t * vm,
		     vlib_node_runtime_t * node, vlib_frame_t * from_frame)
{
  return ethernet_input_inline (vm, node, from_frame,
				ETHERNET_INPUT_VARIANT_ETHERNET_TYPE);
}

static uword
ethernet_input_not_l2 (vlib_main_t * vm,
		       vlib_node_runtime_t * node, vlib_frame_t * from_frame)
{
  return ethernet_input_inline (vm, node, from_frame,
				ETHERNET_INPUT_VARIANT_NOT_L2);
}


// Return the subinterface config struct for the given sw_if_index
// Also return via parameter the appropriate match flags for the
// configured number of tags.
// On error (unsupported or not ethernet) return 0.
static subint_config_t *
ethernet_sw_interface_get_config (vnet_main_t * vnm,
				  u32 sw_if_index,
				  u32 * flags, u32 * unsupported)
{
  ethernet_main_t *em = &ethernet_main;
  vnet_hw_interface_t *hi;
  vnet_sw_interface_t *si;
  main_intf_t *main_intf;
  vlan_table_t *vlan_table;
  qinq_table_t *qinq_table;
  subint_config_t *subint = 0;

  hi = vnet_get_sup_hw_interface (vnm, sw_if_index);

  if (!hi || (hi->hw_class_index != ethernet_hw_interface_class.index))
    {
      *unsupported = 0;
      goto done;		// non-ethernet interface
    }

  // ensure there's an entry for the main intf (shouldn't really be necessary)
  vec_validate (em->main_intfs, hi->hw_if_index);
  main_intf = vec_elt_at_index (em->main_intfs, hi->hw_if_index);

  // Locate the subint for the given ethernet config
  si = vnet_get_sw_interface (vnm, sw_if_index);

  if (si->type == VNET_SW_INTERFACE_TYPE_P2P)
    {
      p2p_ethernet_main_t *p2pm = &p2p_main;
      u32 p2pe_sw_if_index =
	p2p_ethernet_lookup (hi->hw_if_index, si->p2p.client_mac);
      if (p2pe_sw_if_index == ~0)
	{
	  pool_get (p2pm->p2p_subif_pool, subint);
	  si->p2p.pool_index = subint - p2pm->p2p_subif_pool;
	}
      else
	subint = vec_elt_at_index (p2pm->p2p_subif_pool, si->p2p.pool_index);
      *flags = SUBINT_CONFIG_P2P;
    }
  else if (si->sub.eth.flags.default_sub)
    {
      subint = &main_intf->default_subint;
      *flags = SUBINT_CONFIG_MATCH_0_TAG |
	SUBINT_CONFIG_MATCH_1_TAG |
	SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
    }
  else if ((si->sub.eth.flags.no_tags) || (si->sub.eth.raw_flags == 0))
    {
      // if no flags are set then this is a main interface
      // so treat as untagged
      subint = &main_intf->untagged_subint;
      *flags = SUBINT_CONFIG_MATCH_0_TAG;
    }
  else
    {
      // one or two tags
      // first get the vlan table
      if (si->sub.eth.flags.dot1ad)
	{
	  if (main_intf->dot1ad_vlans == 0)
	    {
	      // Allocate a vlan table from the pool
	      pool_get (em->vlan_pool, vlan_table);
	      main_intf->dot1ad_vlans = vlan_table - em->vlan_pool;
	    }
	  else
	    {
	      // Get ptr to existing vlan table
	      vlan_table =
		vec_elt_at_index (em->vlan_pool, main_intf->dot1ad_vlans);
	    }
	}
      else
	{			// dot1q
	  if (main_intf->dot1q_vlans == 0)
	    {
	      // Allocate a vlan table from the pool
	      pool_get (em->vlan_pool, vlan_table);
	      main_intf->dot1q_vlans = vlan_table - em->vlan_pool;
	    }
	  else
	    {
	      // Get ptr to existing vlan table
	      vlan_table =
		vec_elt_at_index (em->vlan_pool, main_intf->dot1q_vlans);
	    }
	}

      if (si->sub.eth.flags.one_tag)
	{
	  *flags = si->sub.eth.flags.exact_match ?
	    SUBINT_CONFIG_MATCH_1_TAG :
	    (SUBINT_CONFIG_MATCH_1_TAG |
	     SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);

	  if (si->sub.eth.flags.outer_vlan_id_any)
	    {
	      // not implemented yet
	      *unsupported = 1;
	      goto done;
	    }
	  else
	    {
	      // a single vlan, a common case
	      subint =
		&vlan_table->vlans[si->sub.eth.
				   outer_vlan_id].single_tag_subint;
	    }

	}
      else
	{
	  // Two tags
	  *flags = si->sub.eth.flags.exact_match ?
	    SUBINT_CONFIG_MATCH_2_TAG :
	    (SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG);

	  if (si->sub.eth.flags.outer_vlan_id_any
	      && si->sub.eth.flags.inner_vlan_id_any)
	    {
	      // not implemented yet
	      *unsupported = 1;
	      goto done;
	    }

	  if (si->sub.eth.flags.inner_vlan_id_any)
	    {
	      // a specific outer and "any" inner
	      // don't need a qinq table for this
	      subint =
		&vlan_table->vlans[si->sub.eth.
				   outer_vlan_id].inner_any_subint;
	      if (si->sub.eth.flags.exact_match)
		{
		  *flags = SUBINT_CONFIG_MATCH_2_TAG;
		}
	      else
		{
		  *flags = SUBINT_CONFIG_MATCH_2_TAG |
		    SUBINT_CONFIG_MATCH_3_TAG;
		}
	    }
	  else
	    {
	      // a specific outer + specifc innner vlan id, a common case

	      // get the qinq table
	      if (vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs == 0)
		{
		  // Allocate a qinq table from the pool
		  pool_get (em->qinq_pool, qinq_table);
		  vlan_table->vlans[si->sub.eth.outer_vlan_id].qinqs =
		    qinq_table - em->qinq_pool;
		}
	      else
		{
		  // Get ptr to existing qinq table
		  qinq_table =
		    vec_elt_at_index (em->qinq_pool,
				      vlan_table->vlans[si->sub.
							eth.outer_vlan_id].
				      qinqs);
		}
	      subint = &qinq_table->vlans[si->sub.eth.inner_vlan_id].subint;
	    }
	}
    }

done:
  return subint;
}

clib_error_t *
ethernet_sw_interface_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
{
  subint_config_t *subint;
  u32 dummy_flags;
  u32 dummy_unsup;
  clib_error_t *error = 0;

  // Find the config for this subinterface
  subint =
    ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
				      &dummy_unsup);

  if (subint == 0)
    {
      // not implemented yet or not ethernet
      goto done;
    }

  subint->sw_if_index =
    ((flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ? sw_if_index : ~0);

done:
  return error;
}

VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_sw_interface_up_down);


// Set the L2/L3 mode for the subinterface
void
ethernet_sw_interface_set_l2_mode (vnet_main_t * vnm, u32 sw_if_index, u32 l2)
{
  subint_config_t *subint;
  u32 dummy_flags;
  u32 dummy_unsup;
  int is_port;
  vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, sw_if_index);

  is_port = !(sw->type == VNET_SW_INTERFACE_TYPE_SUB);

  // Find the config for this subinterface
  subint =
    ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
				      &dummy_unsup);

  if (subint == 0)
    {
      // unimplemented or not ethernet
      goto done;
    }

  // Double check that the config we found is for our interface (or the interface is down)
  ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));

  if (l2)
    {
      subint->flags |= SUBINT_CONFIG_L2;
      if (is_port)
	subint->flags |=
	  SUBINT_CONFIG_MATCH_0_TAG | SUBINT_CONFIG_MATCH_1_TAG
	  | SUBINT_CONFIG_MATCH_2_TAG | SUBINT_CONFIG_MATCH_3_TAG;
    }
  else
    {
      subint->flags &= ~SUBINT_CONFIG_L2;
      if (is_port)
	subint->flags &=
	  ~(SUBINT_CONFIG_MATCH_1_TAG | SUBINT_CONFIG_MATCH_2_TAG
	    | SUBINT_CONFIG_MATCH_3_TAG);
    }

done:
  return;
}

/*
 * Set the L2/L3 mode for the subinterface regardless of port
 */
void
ethernet_sw_interface_set_l2_mode_noport (vnet_main_t * vnm,
					  u32 sw_if_index, u32 l2)
{
  subint_config_t *subint;
  u32 dummy_flags;
  u32 dummy_unsup;

  /* Find the config for this subinterface */
  subint =
    ethernet_sw_interface_get_config (vnm, sw_if_index, &dummy_flags,
				      &dummy_unsup);

  if (subint == 0)
    {
      /* unimplemented or not ethernet */
      goto done;
    }

  /*
   * Double check that the config we found is for our interface (or the
   * interface is down)
   */
  ASSERT ((subint->sw_if_index == sw_if_index) | (subint->sw_if_index == ~0));

  if (l2)
    {
      subint->flags |= SUBINT_CONFIG_L2;
    }
  else
    {
      subint->flags &= ~SUBINT_CONFIG_L2;
    }

done:
  return;
}

static clib_error_t *
ethernet_sw_interface_add_del (vnet_main_t * vnm,
			       u32 sw_if_index, u32 is_create)
{
  clib_error_t *error = 0;
  subint_config_t *subint;
  u32 match_flags;
  u32 unsupported = 0;

  // Find the config for this subinterface
  subint =
    ethernet_sw_interface_get_config (vnm, sw_if_index, &match_flags,
				      &unsupported);

  if (subint == 0)
    {
      // not implemented yet or not ethernet
      if (unsupported)
	{
	  // this is the NYI case
	  error = clib_error_return (0, "not implemented yet");
	}
      goto done;
    }

  if (!is_create)
    {
      subint->flags = 0;
      return error;
    }

  // Initialize the subint
  if (subint->flags & SUBINT_CONFIG_VALID)
    {
      // Error vlan already in use
      error = clib_error_return (0, "vlan is already in use");
    }
  else
    {
      // Note that config is L3 by defaulty
      subint->flags = SUBINT_CONFIG_VALID | match_flags;
      subint->sw_if_index = ~0;	// because interfaces are initially down
    }

done:
  return error;
}

VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ethernet_sw_interface_add_del);

static char *ethernet_error_strings[] = {
#define ethernet_error(n,c,s) s,
#include "error.def"
#undef ethernet_error
};

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ethernet_input_node) = {
  .function = ethernet_input,
  .name = "ethernet-input",
  /* Takes a vector of packets. */
  .vector_size = sizeof (u32),
  .n_errors = ETHERNET_N_ERROR,
  .error_strings = ethernet_error_strings,
  .n_next_nodes = ETHERNET_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
    foreach_ethernet_input_next
#undef _
  },
  .format_buffer = format_ethernet_header_with_length,
  .format_trace = format_ethernet_input_trace,
  .unformat_buffer = unformat_ethernet_header,
};
/* *INDENT-ON* */

/* *INDENT-OFF* */
VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_node, ethernet_input)
/* *INDENT-ON* */

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ethernet_input_type_node, static) = {
  .function = ethernet_input_type,
  .name = "ethernet-input-type",
  /* Takes a vector of packets. */
  .vector_size = sizeof (u32),
  .n_next_nodes = ETHERNET_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
    foreach_ethernet_input_next
#undef _
  },
};
/* *INDENT-ON* */

/* *INDENT-OFF* */
VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_type_node, ethernet_input_type)
/* *INDENT-ON* */

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ethernet_input_not_l2_node, static) = {
  .function = ethernet_input_not_l2,
  .name = "ethernet-input-not-l2",
  /* Takes a vector of packets. */
  .vector_size = sizeof (u32),
  .n_next_nodes = ETHERNET_INPUT_N_NEXT,
  .next_nodes = {
#define _(s,n) [ETHERNET_INPUT_NEXT_##s] = n,
    foreach_ethernet_input_next
#undef _
  },
};
/* *INDENT-ON* */


/* *INDENT-OFF* */
VLIB_NODE_FUNCTION_MULTIARCH (ethernet_input_not_l2_node,
			      ethernet_input_not_l2)
/* *INDENT-ON* */


void
ethernet_set_rx_redirect (vnet_main_t * vnm,
			  vnet_hw_interface_t * hi, u32 enable)
{
  // Insure all packets go to ethernet-input (i.e. untagged ipv4 packets
  // don't go directly to ip4-input)
  vnet_hw_interface_rx_redirect_to_node
    (vnm, hi->hw_if_index, enable ? ethernet_input_node.index : ~0);
}


/*
 * Initialization and registration for the next_by_ethernet structure
 */

clib_error_t *
next_by_ethertype_init (next_by_ethertype_t * l3_next)
{
  l3_next->input_next_by_type = sparse_vec_new
    ( /* elt bytes */ sizeof (l3_next->input_next_by_type[0]),
     /* bits in index */ BITS (((ethernet_header_t *) 0)->type));

  vec_validate (l3_next->sparse_index_by_input_next_index,
		ETHERNET_INPUT_NEXT_DROP);
  vec_validate (l3_next->sparse_index_by_input_next_index,
		ETHERNET_INPUT_NEXT_PUNT);
  l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_DROP] =
    SPARSE_VEC_INVALID_INDEX;
  l3_next->sparse_index_by_input_next_index[ETHERNET_INPUT_NEXT_PUNT] =
    SPARSE_VEC_INVALID_INDEX;

  /*
   * Make sure we don't wipe out an ethernet registration by mistake
   * Can happen if init function ordering constraints are missing.
   */
  if (CLIB_DEBUG > 0)
    {
      ethernet_main_t *em = &ethernet_main;
      ASSERT (em->next_by_ethertype_register_called == 0);
    }

  return 0;
}

// Add an ethertype -> next index mapping to the structure
clib_error_t *
next_by_ethertype_register (next_by_ethertype_t * l3_next,
			    u32 ethertype, u32 next_index)
{
  u32 i;
  u16 *n;
  ethernet_main_t *em = &ethernet_main;

  if (CLIB_DEBUG > 0)
    {
      ethernet_main_t *em = &ethernet_main;
      em->next_by_ethertype_register_called = 1;
    }

  /* Setup ethernet type -> next index sparse vector mapping. */
  n = sparse_vec_validate (l3_next->input_next_by_type, ethertype);
  n[0] = next_index;

  /* Rebuild next index -> sparse index inverse mapping when sparse vector
     is updated. */
  vec_validate (l3_next->sparse_index_by_input_next_index, next_index);
  for (i = 1; i < vec_len (l3_next->input_next_by_type); i++)
    l3_next->
      sparse_index_by_input_next_index[l3_next->input_next_by_type[i]] = i;

  // do not allow the cached next index's to be updated if L3
  // redirect is enabled, as it will have overwritten them
  if (!em->redirect_l3)
    {
      // Cache common ethertypes directly
      if (ethertype == ETHERNET_TYPE_IP4)
	{
	  l3_next->input_next_ip4 = next_index;
	}
      else if (ethertype == ETHERNET_TYPE_IP6)
	{
	  l3_next->input_next_ip6 = next_index;
	}
      else if (ethertype == ETHERNET_TYPE_MPLS)
	{
	  l3_next->input_next_mpls = next_index;
	}
    }
  return 0;
}


static clib_error_t *
ethernet_input_init (vlib_main_t * vm)
{
  ethernet_main_t *em = &ethernet_main;
  __attribute__ ((unused)) vlan_table_t *invalid_vlan_table;
  __attribute__ ((unused)) qinq_table_t *invalid_qinq_table;

  ethernet_setup_node (vm, ethernet_input_node.index);
  ethernet_setup_node (vm, ethernet_input_type_node.index);
  ethernet_setup_node (vm, ethernet_input_not_l2_node.index);

  next_by_ethertype_init (&em->l3_next);

  // Initialize pools and vector for vlan parsing
  vec_validate (em->main_intfs, 10);	// 10 main interfaces
  pool_alloc (em->vlan_pool, 10);
  pool_alloc (em->qinq_pool, 1);

  // The first vlan pool will always be reserved for an invalid table
  pool_get (em->vlan_pool, invalid_vlan_table);	// first id = 0
  // The first qinq pool will always be reserved for an invalid table
  pool_get (em->qinq_pool, invalid_qinq_table);	// first id = 0

  return 0;
}

VLIB_INIT_FUNCTION (ethernet_input_init);

void
ethernet_register_input_type (vlib_main_t * vm,
			      ethernet_type_t type, u32 node_index)
{
  ethernet_main_t *em = &ethernet_main;
  ethernet_type_info_t *ti;
  u32 i;

  {
    clib_error_t *error = vlib_call_init_function (vm, ethernet_init);
    if (error)
      clib_error_report (error);
  }

  ti = ethernet_get_type_info (em, type);
  ti->node_index = node_index;
  ti->next_index = vlib_node_add_next (vm,
				       ethernet_input_node.index, node_index);
  i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);
  ASSERT (i == ti->next_index);

  i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
  ASSERT (i == ti->next_index);

  // Add the L3 node for this ethertype to the next nodes structure
  next_by_ethertype_register (&em->l3_next, type, ti->next_index);

  // Call the registration functions for other nodes that want a mapping
  l2bvi_register_input_type (vm, type, node_index);
}

void
ethernet_register_l2_input (vlib_main_t * vm, u32 node_index)
{
  ethernet_main_t *em = &ethernet_main;
  u32 i;

  em->l2_next =
    vlib_node_add_next (vm, ethernet_input_node.index, node_index);

  /*
   * Even if we never use these arcs, we have to align the next indices...
   */
  i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);

  ASSERT (i == em->l2_next);

  i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);
  ASSERT (i == em->l2_next);
}

// Register a next node for L3 redirect, and enable L3 redirect
void
ethernet_register_l3_redirect (vlib_main_t * vm, u32 node_index)
{
  ethernet_main_t *em = &ethernet_main;
  u32 i;

  em->redirect_l3 = 1;
  em->redirect_l3_next = vlib_node_add_next (vm,
					     ethernet_input_node.index,
					     node_index);
  /*
   * Change the cached next nodes to the redirect node
   */
  em->l3_next.input_next_ip4 = em->redirect_l3_next;
  em->l3_next.input_next_ip6 = em->redirect_l3_next;
  em->l3_next.input_next_mpls = em->redirect_l3_next;

  /*
   * Even if we never use these arcs, we have to align the next indices...
   */
  i = vlib_node_add_next (vm, ethernet_input_type_node.index, node_index);

  ASSERT (i == em->redirect_l3_next);

  i = vlib_node_add_next (vm, ethernet_input_not_l2_node.index, node_index);

  ASSERT (i == em->redirect_l3_next);
}

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