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authorDamjan Marion <damarion@cisco.com>2016-12-19 23:05:39 +0100
committerDamjan Marion <damarion@cisco.com>2016-12-28 12:25:14 +0100
commit7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 (patch)
tree5de62f8dbd3a752f5a676ca600e43d2652d1ff1a /src/vnet/ethernet/node.c
parent696f1adec0df3b8f161862566dd9c86174302658 (diff)
Reorganize source tree to use single autotools instance
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/ethernet/node.c')
-rwxr-xr-xsrc/vnet/ethernet/node.c1368
1 files changed, 1368 insertions, 0 deletions
diff --git a/src/vnet/ethernet/node.c b/src/vnet/ethernet/node.c
new file mode 100755
index 00000000000..6d57da31708
--- /dev/null
+++ b/src/vnet/ethernet/node.c
@@ -0,0 +1,1368 @@
+/*
+ * 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 <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)->ethernet.start_of_ethernet_header = 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;
+
+ *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;
+ 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)->ethernet.start_of_ethernet_header);
+
+ 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)->ethernet.start_of_ethernet_header;
+ vnet_buffer (b0)->l2.l2_len = b0->current_data - eth_start;
+ 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_UNICAST)
+ {
+ *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 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 cpu_index = os_get_cpu_number ();
+ u32 cached_sw_if_index = ~0;
+ u32 cached_is_l2 = 0; /* shut up gcc */
+
+ 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_tagged (type0)
+ && !ethernet_frame_is_tagged (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;
+
+ if (PREDICT_FALSE (cached_sw_if_index != sw_if_index0))
+ {
+ cached_sw_if_index = sw_if_index0;
+ hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ intf0 = vec_elt_at_index (em->main_intfs, hi0->hw_if_index);
+ subint0 = &intf0->untagged_subint;
+ cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
+ }
+
+ vnet_buffer (b0)->ethernet.start_of_ethernet_header =
+ b0->current_data;
+ vnet_buffer (b1)->ethernet.start_of_ethernet_header =
+ 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
+ {
+ 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)->ethernet.start_of_ethernet_header;
+ len1 = vlib_buffer_length_in_chain (vm, b1) + b1->current_data
+ - vnet_buffer (b1)->ethernet.start_of_ethernet_header;
+
+ 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,
+ cpu_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,
+ cpu_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,
+ cpu_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);
+
+ b0->error = error_node->errors[error0];
+ b1->error = error_node->errors[error1];
+
+ ship_it01:
+ // 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;
+ hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ intf0 = vec_elt_at_index (em->main_intfs, hi0->hw_if_index);
+ subint0 = &intf0->untagged_subint;
+ cached_is_l2 = is_l20 = subint0->flags & SUBINT_CONFIG_L2;
+ }
+
+ vnet_buffer (b0)->ethernet.start_of_ethernet_header =
+ b0->current_data;
+
+ if (PREDICT_TRUE (is_l20 != 0))
+ {
+ next0 = em->l2_next;
+ vnet_buffer (b0)->l2.l2_len = sizeof (ethernet_header_t);
+ }
+ else
+ {
+ 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)->ethernet.start_of_ethernet_header;
+
+ 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,
+ cpu_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,
+ cpu_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);
+
+ b0->error = error_node->errors[error0];
+
+ // verify speculative enqueue
+ ship_it0:
+ 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,
+ cpu_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->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_UNICAST)
+ {
+ 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:
+ */