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authorSteven Luong <sluong@cisco.com>2022-10-24 09:10:59 -0700
committerDave Wallace <dwallacelf@gmail.com>2023-01-19 21:37:25 +0000
commit8bd4db5996ba1144f659ea5341f1c2727c650bcd (patch)
tree05ebf7985499bf10b842faf68af2c1d4a5d7c138 /src/plugins/vxlan
parentdd2eff6d060c787e4a49863c9b97bde7215f7740 (diff)
vxlan: convert vxlan to a plugin
per https://jira.fd.io/browse/VPP-2058 Type: improvement Signed-off-by: Steven Luong <sluong@cisco.com> Change-Id: Ica0828de218d25ada2d0d1491e373c3b78179ac1
Diffstat (limited to 'src/plugins/vxlan')
-rw-r--r--src/plugins/vxlan/CMakeLists.txt29
-rw-r--r--src/plugins/vxlan/FEATURE.yaml14
-rw-r--r--src/plugins/vxlan/decap.c1330
-rw-r--r--src/plugins/vxlan/dir.dox24
-rw-r--r--src/plugins/vxlan/encap.c540
-rw-r--r--src/plugins/vxlan/plugin.c22
-rw-r--r--src/plugins/vxlan/vxlan.api198
-rw-r--r--src/plugins/vxlan/vxlan.c1349
-rw-r--r--src/plugins/vxlan/vxlan.h242
-rw-r--r--src/plugins/vxlan/vxlan_api.c376
-rw-r--r--src/plugins/vxlan/vxlan_error.def17
-rw-r--r--src/plugins/vxlan/vxlan_packet.h80
12 files changed, 4221 insertions, 0 deletions
diff --git a/src/plugins/vxlan/CMakeLists.txt b/src/plugins/vxlan/CMakeLists.txt
new file mode 100644
index 00000000000..bd0272a868e
--- /dev/null
+++ b/src/plugins/vxlan/CMakeLists.txt
@@ -0,0 +1,29 @@
+# Copyright (c) 2022 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.
+
+add_vpp_plugin(vxlan
+ SOURCES
+ vxlan.c
+ encap.c
+ decap.c
+ vxlan_api.c
+ plugin.c
+ vxlan.h
+ vxlan_packet.h
+
+ MULTIARCH_SOURCES
+ encap.c
+
+ API_FILES
+ vxlan.api
+)
diff --git a/src/plugins/vxlan/FEATURE.yaml b/src/plugins/vxlan/FEATURE.yaml
new file mode 100644
index 00000000000..dc7d21b010e
--- /dev/null
+++ b/src/plugins/vxlan/FEATURE.yaml
@@ -0,0 +1,14 @@
+---
+name: Virtual eXtensible LAN
+maintainer: John Lo <loj@cisco.com>
+features:
+ - VXLAN tunnel for support of L2 overlay/virtual networks (RFC-7348)
+ - Support either IPv4 or IPv6 underlay network VTEPs
+ - Flooding via headend replication if all VXLAN tunnels in BD are unicast ones
+ - Multicast VXLAN tunnel can be added to BD to flood via IP multicast
+ - VXLAN encap with flow-hashed source port for better underlay IP load balance
+ - VXLAN decap optimization via vxlan-bypass IP feature on underlay interfaces
+ - VXLAN decap HW offload using flow director with DPDK on Intel Fortville NICs
+description: "Virtual eXtensible LAN (VXLAN) tunnels support L2 overlay networks that span L3 networks"
+state: production
+properties: [API, CLI, MULTITHREAD]
diff --git a/src/plugins/vxlan/decap.c b/src/plugins/vxlan/decap.c
new file mode 100644
index 00000000000..f5d1efa2b86
--- /dev/null
+++ b/src/plugins/vxlan/decap.c
@@ -0,0 +1,1330 @@
+/*
+ * decap.c: vxlan tunnel decap packet processing
+ *
+ * Copyright (c) 2013 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.
+ */
+
+#include <vlib/vlib.h>
+#include <vxlan/vxlan.h>
+#include <vnet/udp/udp_local.h>
+
+#ifndef CLIB_MARCH_VARIANT
+__clib_export vlib_node_registration_t vxlan4_input_node;
+__clib_export vlib_node_registration_t vxlan6_input_node;
+#endif
+
+typedef struct
+{
+ u32 next_index;
+ u32 tunnel_index;
+ u32 error;
+ u32 vni;
+} vxlan_rx_trace_t;
+
+static u8 *
+format_vxlan_rx_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 *);
+ vxlan_rx_trace_t *t = va_arg (*args, vxlan_rx_trace_t *);
+
+ if (t->tunnel_index == ~0)
+ return format (s, "VXLAN decap error - tunnel for vni %d does not exist",
+ t->vni);
+ return format (s, "VXLAN decap from vxlan_tunnel%d vni %d next %d error %d",
+ t->tunnel_index, t->vni, t->next_index, t->error);
+}
+
+typedef vxlan4_tunnel_key_t last_tunnel_cache4;
+
+static const vxlan_decap_info_t decap_not_found = {
+ .sw_if_index = ~0,
+ .next_index = VXLAN_INPUT_NEXT_DROP,
+ .error = VXLAN_ERROR_NO_SUCH_TUNNEL
+};
+
+static const vxlan_decap_info_t decap_bad_flags = {
+ .sw_if_index = ~0,
+ .next_index = VXLAN_INPUT_NEXT_DROP,
+ .error = VXLAN_ERROR_BAD_FLAGS
+};
+
+always_inline vxlan_decap_info_t
+vxlan4_find_tunnel (vxlan_main_t * vxm, last_tunnel_cache4 * cache,
+ u32 fib_index, ip4_header_t * ip4_0,
+ vxlan_header_t * vxlan0, u32 * stats_sw_if_index)
+{
+ if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I))
+ return decap_bad_flags;
+
+ /* Make sure VXLAN tunnel exist according to packet S/D IP, UDP port, VRF,
+ * and VNI */
+ u32 dst = ip4_0->dst_address.as_u32;
+ u32 src = ip4_0->src_address.as_u32;
+ udp_header_t *udp = ip4_next_header (ip4_0);
+ vxlan4_tunnel_key_t key4 = {
+ .key[0] = ((u64) dst << 32) | src,
+ .key[1] = ((u64) udp->dst_port << 48) | ((u64) fib_index << 32) |
+ vxlan0->vni_reserved,
+ };
+
+ if (PREDICT_TRUE
+ (key4.key[0] == cache->key[0] && key4.key[1] == cache->key[1]))
+ {
+ /* cache hit */
+ vxlan_decap_info_t di = {.as_u64 = cache->value };
+ *stats_sw_if_index = di.sw_if_index;
+ return di;
+ }
+
+ int rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4);
+ if (PREDICT_TRUE (rv == 0))
+ {
+ *cache = key4;
+ vxlan_decap_info_t di = {.as_u64 = key4.value };
+ *stats_sw_if_index = di.sw_if_index;
+ return di;
+ }
+
+ /* try multicast */
+ if (PREDICT_TRUE (!ip4_address_is_multicast (&ip4_0->dst_address)))
+ return decap_not_found;
+
+ /* search for mcast decap info by mcast address */
+ key4.key[0] = dst;
+ rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4);
+ if (rv != 0)
+ return decap_not_found;
+
+ /* search for unicast tunnel using the mcast tunnel local(src) ip */
+ vxlan_decap_info_t mdi = {.as_u64 = key4.value };
+ key4.key[0] = ((u64) mdi.local_ip.as_u32 << 32) | src;
+ rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4);
+ if (PREDICT_FALSE (rv != 0))
+ return decap_not_found;
+
+ /* mcast traffic does not update the cache */
+ *stats_sw_if_index = mdi.sw_if_index;
+ vxlan_decap_info_t di = {.as_u64 = key4.value };
+ return di;
+}
+
+typedef vxlan6_tunnel_key_t last_tunnel_cache6;
+
+always_inline vxlan_decap_info_t
+vxlan6_find_tunnel (vxlan_main_t * vxm, last_tunnel_cache6 * cache,
+ u32 fib_index, ip6_header_t * ip6_0,
+ vxlan_header_t * vxlan0, u32 * stats_sw_if_index)
+{
+ if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I))
+ return decap_bad_flags;
+
+ /* Make sure VXLAN tunnel exist according to packet SIP, UDP port, VRF, and
+ * VNI */
+ udp_header_t *udp = ip6_next_header (ip6_0);
+ vxlan6_tunnel_key_t key6 = {
+ .key[0] = ip6_0->src_address.as_u64[0],
+ .key[1] = ip6_0->src_address.as_u64[1],
+ .key[2] = ((u64) udp->dst_port << 48) | ((u64) fib_index << 32) |
+ vxlan0->vni_reserved,
+ };
+
+ if (PREDICT_FALSE
+ (clib_bihash_key_compare_24_8 (key6.key, cache->key) == 0))
+ {
+ int rv =
+ clib_bihash_search_inline_24_8 (&vxm->vxlan6_tunnel_by_key, &key6);
+ if (PREDICT_FALSE (rv != 0))
+ return decap_not_found;
+
+ *cache = key6;
+ }
+ vxlan_tunnel_t *t0 = pool_elt_at_index (vxm->tunnels, cache->value);
+
+ /* Validate VXLAN tunnel SIP against packet DIP */
+ if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address, &t0->src.ip6)))
+ *stats_sw_if_index = t0->sw_if_index;
+ else
+ {
+ /* try multicast */
+ if (PREDICT_TRUE (!ip6_address_is_multicast (&ip6_0->dst_address)))
+ return decap_not_found;
+
+ /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
+ key6.key[0] = ip6_0->dst_address.as_u64[0];
+ key6.key[1] = ip6_0->dst_address.as_u64[1];
+ int rv =
+ clib_bihash_search_inline_24_8 (&vxm->vxlan6_tunnel_by_key, &key6);
+ if (PREDICT_FALSE (rv != 0))
+ return decap_not_found;
+
+ vxlan_tunnel_t *mcast_t0 = pool_elt_at_index (vxm->tunnels, key6.value);
+ *stats_sw_if_index = mcast_t0->sw_if_index;
+ }
+
+ vxlan_decap_info_t di = {
+ .sw_if_index = t0->sw_if_index,
+ .next_index = t0->decap_next_index,
+ };
+ return di;
+}
+
+always_inline uword
+vxlan_input (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, u32 is_ip4)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+ vnet_main_t *vnm = vxm->vnet_main;
+ vnet_interface_main_t *im = &vnm->interface_main;
+ vlib_combined_counter_main_t *rx_counter =
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX;
+ last_tunnel_cache4 last4;
+ last_tunnel_cache6 last6;
+ u32 pkts_dropped = 0;
+ u32 thread_index = vlib_get_thread_index ();
+
+ if (is_ip4)
+ clib_memset (&last4, 0xff, sizeof last4);
+ else
+ clib_memset (&last6, 0xff, sizeof last6);
+
+ u32 *from = vlib_frame_vector_args (from_frame);
+ u32 n_left_from = from_frame->n_vectors;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ u32 stats_if0 = ~0, stats_if1 = ~0;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ while (n_left_from >= 4)
+ {
+ /* Prefetch next iteration. */
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ vlib_prefetch_buffer_header (b[3], LOAD);
+
+ /* udp leaves current_data pointing at the vxlan header */
+ void *cur0 = vlib_buffer_get_current (b[0]);
+ void *cur1 = vlib_buffer_get_current (b[1]);
+ vxlan_header_t *vxlan0 = cur0;
+ vxlan_header_t *vxlan1 = cur1;
+
+
+ ip4_header_t *ip4_0, *ip4_1;
+ ip6_header_t *ip6_0, *ip6_1;
+ if (is_ip4)
+ {
+ ip4_0 = cur0 - sizeof (udp_header_t) - sizeof (ip4_header_t);
+ ip4_1 = cur1 - sizeof (udp_header_t) - sizeof (ip4_header_t);
+ }
+ else
+ {
+ ip6_0 = cur0 - sizeof (udp_header_t) - sizeof (ip6_header_t);
+ ip6_1 = cur1 - sizeof (udp_header_t) - sizeof (ip6_header_t);
+ }
+
+ /* pop vxlan */
+ vlib_buffer_advance (b[0], sizeof *vxlan0);
+ vlib_buffer_advance (b[1], sizeof *vxlan1);
+
+ u32 fi0 = vlib_buffer_get_ip_fib_index (b[0], is_ip4);
+ u32 fi1 = vlib_buffer_get_ip_fib_index (b[1], is_ip4);
+
+ vxlan_decap_info_t di0 = is_ip4 ?
+ vxlan4_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan0, &stats_if0) :
+ vxlan6_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan0, &stats_if0);
+ vxlan_decap_info_t di1 = is_ip4 ?
+ vxlan4_find_tunnel (vxm, &last4, fi1, ip4_1, vxlan1, &stats_if1) :
+ vxlan6_find_tunnel (vxm, &last6, fi1, ip6_1, vxlan1, &stats_if1);
+
+ /* Prefetch next iteration. */
+ clib_prefetch_load (b[2]->data);
+ clib_prefetch_load (b[3]->data);
+
+ u32 len0 = vlib_buffer_length_in_chain (vm, b[0]);
+ u32 len1 = vlib_buffer_length_in_chain (vm, b[1]);
+
+ next[0] = di0.next_index;
+ next[1] = di1.next_index;
+
+ u8 any_error = di0.error | di1.error;
+ if (PREDICT_TRUE (any_error == 0))
+ {
+ /* Required to make the l2 tag push / pop code work on l2 subifs */
+ vnet_update_l2_len (b[0]);
+ vnet_update_l2_len (b[1]);
+ /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
+ vnet_buffer (b[0])->sw_if_index[VLIB_RX] = di0.sw_if_index;
+ vnet_buffer (b[1])->sw_if_index[VLIB_RX] = di1.sw_if_index;
+ vlib_increment_combined_counter (rx_counter, thread_index,
+ stats_if0, 1, len0);
+ vlib_increment_combined_counter (rx_counter, thread_index,
+ stats_if1, 1, len1);
+ }
+ else
+ {
+ if (di0.error == 0)
+ {
+ vnet_update_l2_len (b[0]);
+ vnet_buffer (b[0])->sw_if_index[VLIB_RX] = di0.sw_if_index;
+ vlib_increment_combined_counter (rx_counter, thread_index,
+ stats_if0, 1, len0);
+ }
+ else
+ {
+ b[0]->error = node->errors[di0.error];
+ pkts_dropped++;
+ }
+
+ if (di1.error == 0)
+ {
+ vnet_update_l2_len (b[1]);
+ vnet_buffer (b[1])->sw_if_index[VLIB_RX] = di1.sw_if_index;
+ vlib_increment_combined_counter (rx_counter, thread_index,
+ stats_if1, 1, len1);
+ }
+ else
+ {
+ b[1]->error = node->errors[di1.error];
+ pkts_dropped++;
+ }
+ }
+
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_rx_trace_t *tr =
+ vlib_add_trace (vm, node, b[0], sizeof (*tr));
+ tr->next_index = next[0];
+ tr->error = di0.error;
+ tr->tunnel_index = di0.sw_if_index == ~0 ?
+ ~0 : vxm->tunnel_index_by_sw_if_index[di0.sw_if_index];
+ tr->vni = vnet_get_vni (vxlan0);
+ }
+ if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_rx_trace_t *tr =
+ vlib_add_trace (vm, node, b[1], sizeof (*tr));
+ tr->next_index = next[1];
+ tr->error = di1.error;
+ tr->tunnel_index = di1.sw_if_index == ~0 ?
+ ~0 : vxm->tunnel_index_by_sw_if_index[di1.sw_if_index];
+ tr->vni = vnet_get_vni (vxlan1);
+ }
+ b += 2;
+ next += 2;
+ n_left_from -= 2;
+ }
+
+ while (n_left_from > 0)
+ {
+ /* udp leaves current_data pointing at the vxlan header */
+ void *cur0 = vlib_buffer_get_current (b[0]);
+ vxlan_header_t *vxlan0 = cur0;
+ ip4_header_t *ip4_0;
+ ip6_header_t *ip6_0;
+ if (is_ip4)
+ ip4_0 = cur0 - sizeof (udp_header_t) - sizeof (ip4_header_t);
+ else
+ ip6_0 = cur0 - sizeof (udp_header_t) - sizeof (ip6_header_t);
+
+ /* pop (ip, udp, vxlan) */
+ vlib_buffer_advance (b[0], sizeof (*vxlan0));
+
+ u32 fi0 = vlib_buffer_get_ip_fib_index (b[0], is_ip4);
+
+ vxlan_decap_info_t di0 = is_ip4 ?
+ vxlan4_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan0, &stats_if0) :
+ vxlan6_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan0, &stats_if0);
+
+ uword len0 = vlib_buffer_length_in_chain (vm, b[0]);
+
+ next[0] = di0.next_index;
+
+ /* Validate VXLAN tunnel encap-fib index against packet */
+ if (di0.error == 0)
+ {
+ /* Required to make the l2 tag push / pop code work on l2 subifs */
+ vnet_update_l2_len (b[0]);
+
+ /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
+ vnet_buffer (b[0])->sw_if_index[VLIB_RX] = di0.sw_if_index;
+
+ vlib_increment_combined_counter (rx_counter, thread_index,
+ stats_if0, 1, len0);
+ }
+ else
+ {
+ b[0]->error = node->errors[di0.error];
+ pkts_dropped++;
+ }
+
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_rx_trace_t *tr
+ = vlib_add_trace (vm, node, b[0], sizeof (*tr));
+ tr->next_index = next[0];
+ tr->error = di0.error;
+ tr->tunnel_index = di0.sw_if_index == ~0 ?
+ ~0 : vxm->tunnel_index_by_sw_if_index[di0.sw_if_index];
+ tr->vni = vnet_get_vni (vxlan0);
+ }
+ b += 1;
+ next += 1;
+ n_left_from -= 1;
+ }
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, from_frame->n_vectors);
+ /* Do we still need this now that tunnel tx stats is kept? */
+ u32 node_idx = is_ip4 ? vxlan4_input_node.index : vxlan6_input_node.index;
+ vlib_node_increment_counter (vm, node_idx, VXLAN_ERROR_DECAPSULATED,
+ from_frame->n_vectors - pkts_dropped);
+
+ return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (vxlan4_input_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return vxlan_input (vm, node, from_frame, /* is_ip4 */ 1);
+}
+
+VLIB_NODE_FN (vxlan6_input_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return vxlan_input (vm, node, from_frame, /* is_ip4 */ 0);
+}
+
+static char *vxlan_error_strings[] = {
+#define vxlan_error(n,s) s,
+#include <vxlan/vxlan_error.def>
+#undef vxlan_error
+};
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vxlan4_input_node) =
+{
+ .name = "vxlan4-input",
+ .vector_size = sizeof (u32),
+ .n_errors = VXLAN_N_ERROR,
+ .error_strings = vxlan_error_strings,
+ .n_next_nodes = VXLAN_INPUT_N_NEXT,
+ .format_trace = format_vxlan_rx_trace,
+ .next_nodes = {
+#define _(s,n) [VXLAN_INPUT_NEXT_##s] = n,
+ foreach_vxlan_input_next
+#undef _
+ },
+};
+
+VLIB_REGISTER_NODE (vxlan6_input_node) =
+{
+ .name = "vxlan6-input",
+ .vector_size = sizeof (u32),
+ .n_errors = VXLAN_N_ERROR,
+ .error_strings = vxlan_error_strings,
+ .n_next_nodes = VXLAN_INPUT_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [VXLAN_INPUT_NEXT_##s] = n,
+ foreach_vxlan_input_next
+#undef _
+ },
+ .format_trace = format_vxlan_rx_trace,
+};
+/* *INDENT-ON* */
+
+typedef enum
+{
+ IP_VXLAN_BYPASS_NEXT_DROP,
+ IP_VXLAN_BYPASS_NEXT_VXLAN,
+ IP_VXLAN_BYPASS_N_NEXT,
+} ip_vxlan_bypass_next_t;
+
+always_inline uword
+ip_vxlan_bypass_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, u32 is_ip4)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+ u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip4_input_node.index);
+ vtep4_key_t last_vtep4; /* last IPv4 address / fib index
+ matching a local VTEP address */
+ vtep6_key_t last_vtep6; /* last IPv6 address / fib index
+ matching a local VTEP address */
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+
+ last_tunnel_cache4 last4;
+ last_tunnel_cache6 last6;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ ip4_forward_next_trace (vm, node, frame, VLIB_TX);
+
+ if (is_ip4)
+ {
+ vtep4_key_init (&last_vtep4);
+ clib_memset (&last4, 0xff, sizeof last4);
+ }
+ else
+ {
+ vtep6_key_init (&last_vtep6);
+ clib_memset (&last6, 0xff, sizeof last6);
+ }
+
+ 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 *b0, *b1;
+ ip4_header_t *ip40, *ip41;
+ ip6_header_t *ip60, *ip61;
+ udp_header_t *udp0, *udp1;
+ vxlan_header_t *vxlan0, *vxlan1;
+ u32 bi0, ip_len0, udp_len0, flags0, next0;
+ u32 bi1, ip_len1, udp_len1, flags1, next1;
+ i32 len_diff0, len_diff1;
+ u8 error0, good_udp0, proto0;
+ u8 error1, good_udp1, proto1;
+ u32 stats_if0 = ~0, stats_if1 = ~0;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ vlib_prefetch_buffer_header (b[3], LOAD);
+
+ CLIB_PREFETCH (b[2]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (b[3]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ bi0 = to_next[0] = from[0];
+ bi1 = to_next[1] = from[1];
+ from += 2;
+ n_left_from -= 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+
+ b0 = b[0];
+ b1 = b[1];
+ b += 2;
+ if (is_ip4)
+ {
+ ip40 = vlib_buffer_get_current (b0);
+ ip41 = vlib_buffer_get_current (b1);
+ }
+ else
+ {
+ ip60 = vlib_buffer_get_current (b0);
+ ip61 = vlib_buffer_get_current (b1);
+ }
+
+ /* Setup packet for next IP feature */
+ vnet_feature_next (&next0, b0);
+ vnet_feature_next (&next1, b1);
+
+ if (is_ip4)
+ {
+ /* Treat IP frag packets as "experimental" protocol for now
+ until support of IP frag reassembly is implemented */
+ proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol;
+ proto1 = ip4_is_fragment (ip41) ? 0xfe : ip41->protocol;
+ }
+ else
+ {
+ proto0 = ip60->protocol;
+ proto1 = ip61->protocol;
+ }
+
+ /* Process packet 0 */
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit0; /* not UDP packet */
+
+ if (is_ip4)
+ udp0 = ip4_next_header (ip40);
+ else
+ udp0 = ip6_next_header (ip60);
+
+ u32 fi0 = vlib_buffer_get_ip_fib_index (b0, is_ip4);
+ vxlan0 = vlib_buffer_get_current (b0) + sizeof (udp_header_t) +
+ sizeof (ip4_header_t);
+
+ vxlan_decap_info_t di0 =
+ is_ip4 ?
+ vxlan4_find_tunnel (vxm, &last4, fi0, ip40, vxlan0, &stats_if0) :
+ vxlan6_find_tunnel (vxm, &last6, fi0, ip60, vxlan0, &stats_if0);
+
+ if (PREDICT_FALSE (di0.sw_if_index == ~0))
+ goto exit0; /* unknown interface */
+
+ /* Validate DIP against VTEPs */
+ if (is_ip4)
+ {
+#ifdef CLIB_HAVE_VEC512
+ if (!vtep4_check_vector (&vxm->vtep_table, b0, ip40, &last_vtep4,
+ &vxm->vtep4_u512))
+#else
+ if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4))
+#endif
+ goto exit0; /* no local VTEP for VXLAN packet */
+ }
+ else
+ {
+ if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6))
+ goto exit0; /* no local VTEP for VXLAN packet */
+ }
+
+ flags0 = b0->flags;
+ good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp0 |= udp0->checksum == 0;
+
+ /* Verify UDP length */
+ if (is_ip4)
+ ip_len0 = clib_net_to_host_u16 (ip40->length);
+ else
+ ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
+ udp_len0 = clib_net_to_host_u16 (udp0->length);
+ len_diff0 = ip_len0 - udp_len0;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp0))
+ {
+ if (is_ip4)
+ flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
+ else
+ flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
+ good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ if (is_ip4)
+ {
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+ }
+ else
+ {
+ error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
+ }
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ /* vxlan-input node expect current at VXLAN header */
+ if (is_ip4)
+ vlib_buffer_advance (b0,
+ sizeof (ip4_header_t) +
+ sizeof (udp_header_t));
+ else
+ vlib_buffer_advance (b0,
+ sizeof (ip6_header_t) +
+ sizeof (udp_header_t));
+
+ exit0:
+ /* Process packet 1 */
+ if (proto1 != IP_PROTOCOL_UDP)
+ goto exit1; /* not UDP packet */
+
+ if (is_ip4)
+ udp1 = ip4_next_header (ip41);
+ else
+ udp1 = ip6_next_header (ip61);
+
+ u32 fi1 = vlib_buffer_get_ip_fib_index (b1, is_ip4);
+ vxlan1 = vlib_buffer_get_current (b1) + sizeof (udp_header_t) +
+ sizeof (ip4_header_t);
+
+ vxlan_decap_info_t di1 =
+ is_ip4 ?
+ vxlan4_find_tunnel (vxm, &last4, fi1, ip41, vxlan1, &stats_if1) :
+ vxlan6_find_tunnel (vxm, &last6, fi1, ip61, vxlan1, &stats_if1);
+
+ if (PREDICT_FALSE (di1.sw_if_index == ~0))
+ goto exit1; /* unknown interface */
+
+ /* Validate DIP against VTEPs */
+ if (is_ip4)
+ {
+#ifdef CLIB_HAVE_VEC512
+ if (!vtep4_check_vector (&vxm->vtep_table, b1, ip41, &last_vtep4,
+ &vxm->vtep4_u512))
+#else
+ if (!vtep4_check (&vxm->vtep_table, b1, ip41, &last_vtep4))
+#endif
+ goto exit1; /* no local VTEP for VXLAN packet */
+ }
+ else
+ {
+ if (!vtep6_check (&vxm->vtep_table, b1, ip61, &last_vtep6))
+ goto exit1; /* no local VTEP for VXLAN packet */
+ }
+
+ flags1 = b1->flags;
+ good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp1 |= udp1->checksum == 0;
+
+ /* Verify UDP length */
+ if (is_ip4)
+ ip_len1 = clib_net_to_host_u16 (ip41->length);
+ else
+ ip_len1 = clib_net_to_host_u16 (ip61->payload_length);
+ udp_len1 = clib_net_to_host_u16 (udp1->length);
+ len_diff1 = ip_len1 - udp_len1;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp1))
+ {
+ if (is_ip4)
+ flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
+ else
+ flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
+ good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ if (is_ip4)
+ {
+ error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
+ }
+ else
+ {
+ error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
+ error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
+ }
+
+ next1 = error1 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b1->error = error1 ? error_node->errors[error1] : 0;
+
+ /* vxlan-input node expect current at VXLAN header */
+ if (is_ip4)
+ vlib_buffer_advance (b1,
+ sizeof (ip4_header_t) +
+ sizeof (udp_header_t));
+ else
+ vlib_buffer_advance (b1,
+ sizeof (ip6_header_t) +
+ sizeof (udp_header_t));
+
+ exit1:
+ 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)
+ {
+ vlib_buffer_t *b0;
+ ip4_header_t *ip40;
+ ip6_header_t *ip60;
+ udp_header_t *udp0;
+ vxlan_header_t *vxlan0;
+ u32 bi0, ip_len0, udp_len0, flags0, next0;
+ i32 len_diff0;
+ u8 error0, good_udp0, proto0;
+ u32 stats_if0 = ~0;
+
+ bi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ b0 = b[0];
+ b++;
+ if (is_ip4)
+ ip40 = vlib_buffer_get_current (b0);
+ else
+ ip60 = vlib_buffer_get_current (b0);
+
+ /* Setup packet for next IP feature */
+ vnet_feature_next (&next0, b0);
+
+ if (is_ip4)
+ /* Treat IP4 frag packets as "experimental" protocol for now
+ until support of IP frag reassembly is implemented */
+ proto0 = ip4_is_fragment (ip40) ? 0xfe : ip40->protocol;
+ else
+ proto0 = ip60->protocol;
+
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit; /* not UDP packet */
+
+ if (is_ip4)
+ udp0 = ip4_next_header (ip40);
+ else
+ udp0 = ip6_next_header (ip60);
+
+ u32 fi0 = vlib_buffer_get_ip_fib_index (b0, is_ip4);
+ vxlan0 = vlib_buffer_get_current (b0) + sizeof (udp_header_t) +
+ sizeof (ip4_header_t);
+
+ vxlan_decap_info_t di0 =
+ is_ip4 ?
+ vxlan4_find_tunnel (vxm, &last4, fi0, ip40, vxlan0, &stats_if0) :
+ vxlan6_find_tunnel (vxm, &last6, fi0, ip60, vxlan0, &stats_if0);
+
+ if (PREDICT_FALSE (di0.sw_if_index == ~0))
+ goto exit; /* unknown interface */
+
+ /* Validate DIP against VTEPs */
+ if (is_ip4)
+ {
+#ifdef CLIB_HAVE_VEC512
+ if (!vtep4_check_vector (&vxm->vtep_table, b0, ip40, &last_vtep4,
+ &vxm->vtep4_u512))
+#else
+ if (!vtep4_check (&vxm->vtep_table, b0, ip40, &last_vtep4))
+#endif
+ goto exit; /* no local VTEP for VXLAN packet */
+ }
+ else
+ {
+ if (!vtep6_check (&vxm->vtep_table, b0, ip60, &last_vtep6))
+ goto exit; /* no local VTEP for VXLAN packet */
+ }
+
+ flags0 = b0->flags;
+ good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp0 |= udp0->checksum == 0;
+
+ /* Verify UDP length */
+ if (is_ip4)
+ ip_len0 = clib_net_to_host_u16 (ip40->length);
+ else
+ ip_len0 = clib_net_to_host_u16 (ip60->payload_length);
+ udp_len0 = clib_net_to_host_u16 (udp0->length);
+ len_diff0 = ip_len0 - udp_len0;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp0))
+ {
+ if (is_ip4)
+ flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
+ else
+ flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
+ good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ if (is_ip4)
+ {
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+ }
+ else
+ {
+ error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
+ }
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ /* vxlan-input node expect current at VXLAN header */
+ if (is_ip4)
+ vlib_buffer_advance (b0,
+ sizeof (ip4_header_t) +
+ sizeof (udp_header_t));
+ else
+ vlib_buffer_advance (b0,
+ sizeof (ip6_header_t) +
+ sizeof (udp_header_t));
+
+ exit:
+ 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;
+}
+
+VLIB_NODE_FN (ip4_vxlan_bypass_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_vxlan_bypass_node) =
+{
+ .name = "ip4-vxlan-bypass",
+ .vector_size = sizeof (u32),
+ .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
+ .next_nodes = {
+ [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
+ [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-input",
+ },
+ .format_buffer = format_ip4_header,
+ .format_trace = format_ip4_forward_next_trace,
+};
+
+/* *INDENT-ON* */
+
+/* Dummy init function to get us linked in. */
+static clib_error_t *
+ip4_vxlan_bypass_init (vlib_main_t * vm)
+{
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ip4_vxlan_bypass_init);
+
+VLIB_NODE_FN (ip6_vxlan_bypass_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_vxlan_bypass_node) =
+{
+ .name = "ip6-vxlan-bypass",
+ .vector_size = sizeof (u32),
+ .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
+ .next_nodes = {
+ [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
+ [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan6-input",
+ },
+ .format_buffer = format_ip6_header,
+ .format_trace = format_ip6_forward_next_trace,
+};
+
+/* *INDENT-ON* */
+
+/* Dummy init function to get us linked in. */
+static clib_error_t *
+ip6_vxlan_bypass_init (vlib_main_t * vm)
+{
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ip6_vxlan_bypass_init);
+
+#define foreach_vxlan_flow_input_next \
+_(DROP, "error-drop") \
+_(L2_INPUT, "l2-input")
+
+typedef enum
+{
+#define _(s,n) VXLAN_FLOW_NEXT_##s,
+ foreach_vxlan_flow_input_next
+#undef _
+ VXLAN_FLOW_N_NEXT,
+} vxlan_flow_input_next_t;
+
+#define foreach_vxlan_flow_error \
+ _(NONE, "no error") \
+ _(IP_CHECKSUM_ERROR, "Rx ip checksum errors") \
+ _(IP_HEADER_ERROR, "Rx ip header errors") \
+ _(UDP_CHECKSUM_ERROR, "Rx udp checksum errors") \
+ _(UDP_LENGTH_ERROR, "Rx udp length errors")
+
+typedef enum
+{
+#define _(f,s) VXLAN_FLOW_ERROR_##f,
+ foreach_vxlan_flow_error
+#undef _
+ VXLAN_FLOW_N_ERROR,
+} vxlan_flow_error_t;
+
+static char *vxlan_flow_error_strings[] = {
+#define _(n,s) s,
+ foreach_vxlan_flow_error
+#undef _
+};
+
+
+static_always_inline u8
+vxlan_validate_udp_csum (vlib_main_t * vm, vlib_buffer_t * b)
+{
+ u32 flags = b->flags;
+ enum
+ { offset =
+ sizeof (ip4_header_t) + sizeof (udp_header_t) + sizeof (vxlan_header_t),
+ };
+
+ /* Verify UDP checksum */
+ if ((flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
+ {
+ vlib_buffer_advance (b, -offset);
+ flags = ip4_tcp_udp_validate_checksum (vm, b);
+ vlib_buffer_advance (b, offset);
+ }
+
+ return (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+}
+
+static_always_inline u8
+vxlan_check_udp_csum (vlib_main_t * vm, vlib_buffer_t * b)
+{
+ ip4_vxlan_header_t *hdr = vlib_buffer_get_current (b) - sizeof *hdr;
+ udp_header_t *udp = &hdr->udp;
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ u8 good_csum = (b->flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0 ||
+ udp->checksum == 0;
+
+ return !good_csum;
+}
+
+static_always_inline u8
+vxlan_check_ip (vlib_buffer_t * b, u16 payload_len)
+{
+ ip4_vxlan_header_t *hdr = vlib_buffer_get_current (b) - sizeof *hdr;
+ u16 ip_len = clib_net_to_host_u16 (hdr->ip4.length);
+ u16 expected = payload_len + sizeof *hdr;
+ return ip_len > expected || hdr->ip4.ttl == 0
+ || hdr->ip4.ip_version_and_header_length != 0x45;
+}
+
+static_always_inline u8
+vxlan_check_ip_udp_len (vlib_buffer_t * b)
+{
+ ip4_vxlan_header_t *hdr = vlib_buffer_get_current (b) - sizeof *hdr;
+ u16 ip_len = clib_net_to_host_u16 (hdr->ip4.length);
+ u16 udp_len = clib_net_to_host_u16 (hdr->udp.length);
+ return udp_len > ip_len;
+}
+
+static_always_inline u8
+vxlan_err_code (u8 ip_err0, u8 udp_err0, u8 csum_err0)
+{
+ u8 error0 = VXLAN_FLOW_ERROR_NONE;
+ if (ip_err0)
+ error0 = VXLAN_FLOW_ERROR_IP_HEADER_ERROR;
+ if (udp_err0)
+ error0 = VXLAN_FLOW_ERROR_UDP_LENGTH_ERROR;
+ if (csum_err0)
+ error0 = VXLAN_FLOW_ERROR_UDP_CHECKSUM_ERROR;
+ return error0;
+}
+
+VLIB_NODE_FN (vxlan4_flow_input_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * f)
+{
+ enum
+ { payload_offset = sizeof (ip4_vxlan_header_t) };
+
+ vxlan_main_t *vxm = &vxlan_main;
+ vnet_interface_main_t *im = &vnet_main.interface_main;
+ vlib_combined_counter_main_t *rx_counter[VXLAN_FLOW_N_NEXT] = {
+ [VXLAN_FLOW_NEXT_DROP] =
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP,
+ [VXLAN_FLOW_NEXT_L2_INPUT] =
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
+ };
+ u32 thread_index = vlib_get_thread_index ();
+
+ u32 *from = vlib_frame_vector_args (f);
+ u32 n_left_from = f->n_vectors;
+ u32 next_index = VXLAN_FLOW_NEXT_L2_INPUT;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next, *to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 3 && n_left_to_next > 3)
+ {
+ u32 bi0 = to_next[0] = from[0];
+ u32 bi1 = to_next[1] = from[1];
+ u32 bi2 = to_next[2] = from[2];
+ u32 bi3 = to_next[3] = from[3];
+ from += 4;
+ n_left_from -= 4;
+ to_next += 4;
+ n_left_to_next -= 4;
+
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ vlib_buffer_t *b1 = vlib_get_buffer (vm, bi1);
+ vlib_buffer_t *b2 = vlib_get_buffer (vm, bi2);
+ vlib_buffer_t *b3 = vlib_get_buffer (vm, bi3);
+
+ vlib_buffer_advance (b0, payload_offset);
+ vlib_buffer_advance (b1, payload_offset);
+ vlib_buffer_advance (b2, payload_offset);
+ vlib_buffer_advance (b3, payload_offset);
+
+ u16 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u16 len1 = vlib_buffer_length_in_chain (vm, b1);
+ u16 len2 = vlib_buffer_length_in_chain (vm, b2);
+ u16 len3 = vlib_buffer_length_in_chain (vm, b3);
+
+ u32 next0 = VXLAN_FLOW_NEXT_L2_INPUT, next1 =
+ VXLAN_FLOW_NEXT_L2_INPUT, next2 =
+ VXLAN_FLOW_NEXT_L2_INPUT, next3 = VXLAN_FLOW_NEXT_L2_INPUT;
+
+ u8 ip_err0 = vxlan_check_ip (b0, len0);
+ u8 ip_err1 = vxlan_check_ip (b1, len1);
+ u8 ip_err2 = vxlan_check_ip (b2, len2);
+ u8 ip_err3 = vxlan_check_ip (b3, len3);
+ u8 ip_err = ip_err0 | ip_err1 | ip_err2 | ip_err3;
+
+ u8 udp_err0 = vxlan_check_ip_udp_len (b0);
+ u8 udp_err1 = vxlan_check_ip_udp_len (b1);
+ u8 udp_err2 = vxlan_check_ip_udp_len (b2);
+ u8 udp_err3 = vxlan_check_ip_udp_len (b3);
+ u8 udp_err = udp_err0 | udp_err1 | udp_err2 | udp_err3;
+
+ u8 csum_err0 = vxlan_check_udp_csum (vm, b0);
+ u8 csum_err1 = vxlan_check_udp_csum (vm, b1);
+ u8 csum_err2 = vxlan_check_udp_csum (vm, b2);
+ u8 csum_err3 = vxlan_check_udp_csum (vm, b3);
+ u8 csum_err = csum_err0 | csum_err1 | csum_err2 | csum_err3;
+
+ if (PREDICT_FALSE (csum_err))
+ {
+ if (csum_err0)
+ csum_err0 = !vxlan_validate_udp_csum (vm, b0);
+ if (csum_err1)
+ csum_err1 = !vxlan_validate_udp_csum (vm, b1);
+ if (csum_err2)
+ csum_err2 = !vxlan_validate_udp_csum (vm, b2);
+ if (csum_err3)
+ csum_err3 = !vxlan_validate_udp_csum (vm, b3);
+ csum_err = csum_err0 | csum_err1 | csum_err2 | csum_err3;
+ }
+
+ if (PREDICT_FALSE (ip_err || udp_err || csum_err))
+ {
+ if (ip_err0 || udp_err0 || csum_err0)
+ {
+ next0 = VXLAN_FLOW_NEXT_DROP;
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ b0->error = node->errors[error0];
+ }
+ if (ip_err1 || udp_err1 || csum_err1)
+ {
+ next1 = VXLAN_FLOW_NEXT_DROP;
+ u8 error1 = vxlan_err_code (ip_err1, udp_err1, csum_err1);
+ b1->error = node->errors[error1];
+ }
+ if (ip_err2 || udp_err2 || csum_err2)
+ {
+ next2 = VXLAN_FLOW_NEXT_DROP;
+ u8 error2 = vxlan_err_code (ip_err2, udp_err2, csum_err2);
+ b2->error = node->errors[error2];
+ }
+ if (ip_err3 || udp_err3 || csum_err3)
+ {
+ next3 = VXLAN_FLOW_NEXT_DROP;
+ u8 error3 = vxlan_err_code (ip_err3, udp_err3, csum_err3);
+ b3->error = node->errors[error3];
+ }
+ }
+
+ vnet_update_l2_len (b0);
+ vnet_update_l2_len (b1);
+ vnet_update_l2_len (b2);
+ vnet_update_l2_len (b3);
+
+ ASSERT (b0->flow_id != 0);
+ ASSERT (b1->flow_id != 0);
+ ASSERT (b2->flow_id != 0);
+ ASSERT (b3->flow_id != 0);
+
+ u32 t_index0 = b0->flow_id - vxm->flow_id_start;
+ u32 t_index1 = b1->flow_id - vxm->flow_id_start;
+ u32 t_index2 = b2->flow_id - vxm->flow_id_start;
+ u32 t_index3 = b3->flow_id - vxm->flow_id_start;
+
+ vxlan_tunnel_t *t0 = &vxm->tunnels[t_index0];
+ vxlan_tunnel_t *t1 = &vxm->tunnels[t_index1];
+ vxlan_tunnel_t *t2 = &vxm->tunnels[t_index2];
+ vxlan_tunnel_t *t3 = &vxm->tunnels[t_index3];
+
+ /* flow id consumed */
+ b0->flow_id = 0;
+ b1->flow_id = 0;
+ b2->flow_id = 0;
+ b3->flow_id = 0;
+
+ u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX] =
+ t0->sw_if_index;
+ u32 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX] =
+ t1->sw_if_index;
+ u32 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX] =
+ t2->sw_if_index;
+ u32 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX] =
+ t3->sw_if_index;
+
+ vlib_increment_combined_counter (rx_counter[next0], thread_index,
+ sw_if_index0, 1, len0);
+ vlib_increment_combined_counter (rx_counter[next1], thread_index,
+ sw_if_index1, 1, len1);
+ vlib_increment_combined_counter (rx_counter[next2], thread_index,
+ sw_if_index2, 1, len2);
+ vlib_increment_combined_counter (rx_counter[next3], thread_index,
+ sw_if_index3, 1, len3);
+
+ u32 flags = b0->flags | b1->flags | b2->flags | b3->flags;
+
+ if (PREDICT_FALSE (flags & VLIB_BUFFER_IS_TRACED))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof *tr);
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ tr->next_index = next0;
+ tr->error = error0;
+ tr->tunnel_index = t_index0;
+ tr->vni = t0->vni;
+ }
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr =
+ vlib_add_trace (vm, node, b1, sizeof *tr);
+ u8 error1 = vxlan_err_code (ip_err1, udp_err1, csum_err1);
+ tr->next_index = next1;
+ tr->error = error1;
+ tr->tunnel_index = t_index1;
+ tr->vni = t1->vni;
+ }
+ if (b2->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr =
+ vlib_add_trace (vm, node, b2, sizeof *tr);
+ u8 error2 = vxlan_err_code (ip_err2, udp_err2, csum_err2);
+ tr->next_index = next2;
+ tr->error = error2;
+ tr->tunnel_index = t_index2;
+ tr->vni = t2->vni;
+ }
+ if (b3->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr =
+ vlib_add_trace (vm, node, b3, sizeof *tr);
+ u8 error3 = vxlan_err_code (ip_err3, udp_err3, csum_err3);
+ tr->next_index = next3;
+ tr->error = error3;
+ tr->tunnel_index = t_index3;
+ tr->vni = t3->vni;
+ }
+ }
+ vlib_validate_buffer_enqueue_x4
+ (vm, node, next_index, to_next, n_left_to_next,
+ bi0, bi1, bi2, bi3, next0, next1, next2, next3);
+ }
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0 = to_next[0] = from[0];
+ from++;
+ n_left_from--;
+ to_next++;
+ n_left_to_next--;
+
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ vlib_buffer_advance (b0, payload_offset);
+
+ u16 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u32 next0 = VXLAN_FLOW_NEXT_L2_INPUT;
+
+ u8 ip_err0 = vxlan_check_ip (b0, len0);
+ u8 udp_err0 = vxlan_check_ip_udp_len (b0);
+ u8 csum_err0 = vxlan_check_udp_csum (vm, b0);
+
+ if (csum_err0)
+ csum_err0 = !vxlan_validate_udp_csum (vm, b0);
+ if (ip_err0 || udp_err0 || csum_err0)
+ {
+ next0 = VXLAN_FLOW_NEXT_DROP;
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ b0->error = node->errors[error0];
+ }
+
+ vnet_update_l2_len (b0);
+
+ ASSERT (b0->flow_id != 0);
+ u32 t_index0 = b0->flow_id - vxm->flow_id_start;
+ vxlan_tunnel_t *t0 = &vxm->tunnels[t_index0];
+ b0->flow_id = 0;
+
+ u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX] =
+ t0->sw_if_index;
+ vlib_increment_combined_counter (rx_counter[next0], thread_index,
+ sw_if_index0, 1, len0);
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_rx_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof *tr);
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ tr->next_index = next0;
+ tr->error = error0;
+ tr->tunnel_index = t_index0;
+ tr->vni = t0->vni;
+ }
+ 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 f->n_vectors;
+}
+
+/* *INDENT-OFF* */
+#ifndef CLIB_MULTIARCH_VARIANT
+VLIB_REGISTER_NODE (vxlan4_flow_input_node) = {
+ .name = "vxlan-flow-input",
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_vxlan_rx_trace,
+
+ .n_errors = VXLAN_FLOW_N_ERROR,
+ .error_strings = vxlan_flow_error_strings,
+
+ .n_next_nodes = VXLAN_FLOW_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [VXLAN_FLOW_NEXT_##s] = n,
+ foreach_vxlan_flow_input_next
+#undef _
+ },
+};
+#endif
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/vxlan/dir.dox b/src/plugins/vxlan/dir.dox
new file mode 100644
index 00000000000..31a9e2b6112
--- /dev/null
+++ b/src/plugins/vxlan/dir.dox
@@ -0,0 +1,24 @@
+/*
+ * 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.
+ */
+
+/**
+@dir
+@brief VXLAN Code.
+
+This directory contains source code to support VXLAN.
+
+*/
+/*? %%clicmd:group_label VXLAN CLI %% ?*/
diff --git a/src/plugins/vxlan/encap.c b/src/plugins/vxlan/encap.c
new file mode 100644
index 00000000000..e4103ec0083
--- /dev/null
+++ b/src/plugins/vxlan/encap.c
@@ -0,0 +1,540 @@
+
+/*
+ * 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.
+ */
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/interface_output.h>
+#include <vxlan/vxlan.h>
+#include <vnet/qos/qos_types.h>
+#include <vnet/adj/rewrite.h>
+
+/* Statistics (not all errors) */
+#define foreach_vxlan_encap_error \
+_(ENCAPSULATED, "good packets encapsulated")
+
+static char *vxlan_encap_error_strings[] = {
+#define _(sym,string) string,
+ foreach_vxlan_encap_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) VXLAN_ENCAP_ERROR_##sym,
+ foreach_vxlan_encap_error
+#undef _
+ VXLAN_ENCAP_N_ERROR,
+} vxlan_encap_error_t;
+
+typedef enum
+{
+ VXLAN_ENCAP_NEXT_DROP,
+ VXLAN_ENCAP_N_NEXT,
+} vxlan_encap_next_t;
+
+typedef struct
+{
+ u32 tunnel_index;
+ u32 vni;
+} vxlan_encap_trace_t;
+
+#ifndef CLIB_MARCH_VARIANT
+u8 *
+format_vxlan_encap_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 *);
+ vxlan_encap_trace_t *t = va_arg (*args, vxlan_encap_trace_t *);
+
+ s = format (s, "VXLAN encap to vxlan_tunnel%d vni %d",
+ t->tunnel_index, t->vni);
+ return s;
+}
+#endif
+
+always_inline uword
+vxlan_encap_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *from_frame, u8 is_ip4)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ vxlan_main_t *vxm = &vxlan_main;
+ vnet_main_t *vnm = vxm->vnet_main;
+ vnet_interface_main_t *im = &vnm->interface_main;
+ vlib_combined_counter_main_t *tx_counter =
+ im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
+ u32 pkts_encapsulated = 0;
+ u32 thread_index = vlib_get_thread_index ();
+ u32 sw_if_index0 = 0, sw_if_index1 = 0;
+ u32 next0 = 0, next1 = 0;
+ vxlan_tunnel_t *t0 = NULL, *t1 = NULL;
+ index_t dpoi_idx0 = INDEX_INVALID, dpoi_idx1 = INDEX_INVALID;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
+ vlib_buffer_t **b = bufs;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ STATIC_ASSERT_SIZEOF (ip6_vxlan_header_t, 56);
+ STATIC_ASSERT_SIZEOF (ip4_vxlan_header_t, 36);
+
+ u8 const underlay_hdr_len = is_ip4 ?
+ sizeof (ip4_vxlan_header_t) : sizeof (ip6_vxlan_header_t);
+ u16 const l3_len = is_ip4 ? sizeof (ip4_header_t) : sizeof (ip6_header_t);
+ u32 const outer_packet_csum_offload_flags =
+ is_ip4 ? (VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM |
+ VNET_BUFFER_OFFLOAD_F_TNL_VXLAN) :
+ (VNET_BUFFER_OFFLOAD_F_OUTER_UDP_CKSUM |
+ VNET_BUFFER_OFFLOAD_F_TNL_VXLAN);
+
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ 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)
+ {
+ /* Prefetch next iteration. */
+ {
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ vlib_prefetch_buffer_header (b[3], LOAD);
+
+ CLIB_PREFETCH (b[2]->data - CLIB_CACHE_LINE_BYTES,
+ 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (b[3]->data - CLIB_CACHE_LINE_BYTES,
+ 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ u32 bi0 = to_next[0] = from[0];
+ u32 bi1 = to_next[1] = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ vlib_buffer_t *b0 = b[0];
+ vlib_buffer_t *b1 = b[1];
+ b += 2;
+
+ u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
+ u32 flow_hash1 = vnet_l2_compute_flow_hash (b1);
+
+ /* Get next node index and adj index from tunnel next_dpo */
+ if (sw_if_index0 != vnet_buffer (b0)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ vnet_hw_interface_t *hi0 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ t0 = &vxm->tunnels[hi0->dev_instance];
+ /* Note: change to always set next0 if it may set to drop */
+ next0 = t0->next_dpo.dpoi_next_node;
+ dpoi_idx0 = t0->next_dpo.dpoi_index;
+ }
+
+ /* Get next node index and adj index from tunnel next_dpo */
+ if (sw_if_index1 != vnet_buffer (b1)->sw_if_index[VLIB_TX])
+ {
+ if (sw_if_index0 == vnet_buffer (b1)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index1 = sw_if_index0;
+ t1 = t0;
+ next1 = next0;
+ dpoi_idx1 = dpoi_idx0;
+ }
+ else
+ {
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
+ vnet_hw_interface_t *hi1 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index1);
+ t1 = &vxm->tunnels[hi1->dev_instance];
+ /* Note: change to always set next1 if it may set to drop */
+ next1 = t1->next_dpo.dpoi_next_node;
+ dpoi_idx1 = t1->next_dpo.dpoi_index;
+ }
+ }
+
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
+ vnet_buffer (b1)->ip.adj_index[VLIB_TX] = dpoi_idx1;
+
+ ASSERT (t0->rewrite_header.data_bytes == underlay_hdr_len);
+ ASSERT (t1->rewrite_header.data_bytes == underlay_hdr_len);
+ vnet_rewrite_two_headers (*t0, *t1, vlib_buffer_get_current (b0),
+ vlib_buffer_get_current (b1),
+ underlay_hdr_len);
+
+ vlib_buffer_advance (b0, -underlay_hdr_len);
+ vlib_buffer_advance (b1, -underlay_hdr_len);
+
+ u32 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u32 len1 = vlib_buffer_length_in_chain (vm, b1);
+ u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
+ u16 payload_l1 = clib_host_to_net_u16 (len1 - l3_len);
+
+ void *underlay0 = vlib_buffer_get_current (b0);
+ void *underlay1 = vlib_buffer_get_current (b1);
+
+ ip4_header_t *ip4_0, *ip4_1;
+ qos_bits_t ip4_0_tos = 0, ip4_1_tos = 0;
+ ip6_header_t *ip6_0, *ip6_1;
+ udp_header_t *udp0, *udp1;
+ u8 *l3_0, *l3_1;
+ if (is_ip4)
+ {
+ ip4_vxlan_header_t *hdr0 = underlay0;
+ ip4_vxlan_header_t *hdr1 = underlay1;
+
+ /* Fix the IP4 checksum and length */
+ ip4_0 = &hdr0->ip4;
+ ip4_1 = &hdr1->ip4;
+ ip4_0->length = clib_host_to_net_u16 (len0);
+ ip4_1->length = clib_host_to_net_u16 (len1);
+
+ if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+ {
+ ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
+ ip4_0->tos = ip4_0_tos;
+ }
+ if (PREDICT_FALSE (b1->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+ {
+ ip4_1_tos = vnet_buffer2 (b1)->qos.bits;
+ ip4_1->tos = ip4_1_tos;
+ }
+
+ l3_0 = (u8 *) ip4_0;
+ l3_1 = (u8 *) ip4_1;
+ udp0 = &hdr0->udp;
+ udp1 = &hdr1->udp;
+ }
+ else /* ipv6 */
+ {
+ ip6_vxlan_header_t *hdr0 = underlay0;
+ ip6_vxlan_header_t *hdr1 = underlay1;
+
+ /* Fix IP6 payload length */
+ ip6_0 = &hdr0->ip6;
+ ip6_1 = &hdr1->ip6;
+ ip6_0->payload_length = payload_l0;
+ ip6_1->payload_length = payload_l1;
+
+ l3_0 = (u8 *) ip6_0;
+ l3_1 = (u8 *) ip6_1;
+ udp0 = &hdr0->udp;
+ udp1 = &hdr1->udp;
+ }
+
+ /* Fix UDP length and set source port */
+ udp0->length = payload_l0;
+ udp0->src_port = flow_hash0;
+ udp1->length = payload_l1;
+ udp1->src_port = flow_hash1;
+
+ if (b0->flags & VNET_BUFFER_F_OFFLOAD)
+ {
+ vnet_buffer2 (b0)->outer_l3_hdr_offset = l3_0 - b0->data;
+ vnet_buffer2 (b0)->outer_l4_hdr_offset = (u8 *) udp0 - b0->data;
+ vnet_buffer_offload_flags_set (b0,
+ outer_packet_csum_offload_flags);
+ }
+ /* IPv4 checksum only */
+ else if (is_ip4)
+ {
+ ip_csum_t sum0 = ip4_0->checksum;
+ sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
+ length /* changed member */);
+ if (PREDICT_FALSE (ip4_0_tos))
+ {
+ sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
+ tos /* changed member */);
+ }
+ ip4_0->checksum = ip_csum_fold (sum0);
+ }
+ /* IPv6 UDP checksum is mandatory */
+ else
+ {
+ int bogus = 0;
+
+ udp0->checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6_0, &bogus);
+ ASSERT (bogus == 0);
+ if (udp0->checksum == 0)
+ udp0->checksum = 0xffff;
+ }
+
+ if (b1->flags & VNET_BUFFER_F_OFFLOAD)
+ {
+ vnet_buffer2 (b1)->outer_l3_hdr_offset = l3_1 - b1->data;
+ vnet_buffer2 (b1)->outer_l4_hdr_offset = (u8 *) udp1 - b1->data;
+ vnet_buffer_offload_flags_set (b1,
+ outer_packet_csum_offload_flags);
+ }
+ /* IPv4 checksum only */
+ else if (is_ip4)
+ {
+ ip_csum_t sum1 = ip4_1->checksum;
+ sum1 = ip_csum_update (sum1, 0, ip4_1->length, ip4_header_t,
+ length /* changed member */);
+ if (PREDICT_FALSE (ip4_1_tos))
+ {
+ sum1 = ip_csum_update (sum1, 0, ip4_1_tos, ip4_header_t,
+ tos /* changed member */);
+ }
+ ip4_1->checksum = ip_csum_fold (sum1);
+ }
+ /* IPv6 UDP checksum is mandatory */
+ else
+ {
+ int bogus = 0;
+
+ udp1->checksum = ip6_tcp_udp_icmp_compute_checksum
+ (vm, b1, ip6_1, &bogus);
+ ASSERT (bogus == 0);
+ if (udp1->checksum == 0)
+ udp1->checksum = 0xffff;
+ }
+
+ /* save inner packet flow_hash for load-balance node */
+ vnet_buffer (b0)->ip.flow_hash = flow_hash0;
+ vnet_buffer (b1)->ip.flow_hash = flow_hash1;
+
+ if (sw_if_index0 == sw_if_index1)
+ {
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index0, 2, len0 + len1);
+ }
+ else
+ {
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index0, 1, len0);
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index1, 1, len1);
+ }
+ pkts_encapsulated += 2;
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_encap_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->tunnel_index = t0 - vxm->tunnels;
+ tr->vni = t0->vni;
+ }
+
+ if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_encap_trace_t *tr =
+ vlib_add_trace (vm, node, b1, sizeof (*tr));
+ tr->tunnel_index = t1 - vxm->tunnels;
+ tr->vni = t1->vni;
+ }
+
+ 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 = to_next[0] = from[0];
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ vlib_buffer_t *b0 = b[0];
+ b += 1;
+
+ u32 flow_hash0 = vnet_l2_compute_flow_hash (b0);
+
+ /* Get next node index and adj index from tunnel next_dpo */
+ if (sw_if_index0 != vnet_buffer (b0)->sw_if_index[VLIB_TX])
+ {
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ vnet_hw_interface_t *hi0 =
+ vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ t0 = &vxm->tunnels[hi0->dev_instance];
+ /* Note: change to always set next0 if it may be set to drop */
+ next0 = t0->next_dpo.dpoi_next_node;
+ dpoi_idx0 = t0->next_dpo.dpoi_index;
+ }
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpoi_idx0;
+
+ ASSERT (t0->rewrite_header.data_bytes == underlay_hdr_len);
+ vnet_rewrite_one_header (*t0, vlib_buffer_get_current (b0),
+ underlay_hdr_len);
+
+ vlib_buffer_advance (b0, -underlay_hdr_len);
+ void *underlay0 = vlib_buffer_get_current (b0);
+
+ u32 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u16 payload_l0 = clib_host_to_net_u16 (len0 - l3_len);
+
+ udp_header_t *udp0;
+ ip4_header_t *ip4_0;
+ qos_bits_t ip4_0_tos = 0;
+ ip6_header_t *ip6_0;
+ u8 *l3_0;
+ if (is_ip4)
+ {
+ ip4_vxlan_header_t *hdr = underlay0;
+
+ /* Fix the IP4 checksum and length */
+ ip4_0 = &hdr->ip4;
+ ip4_0->length = clib_host_to_net_u16 (len0);
+
+ if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_QOS_DATA_VALID))
+ {
+ ip4_0_tos = vnet_buffer2 (b0)->qos.bits;
+ ip4_0->tos = ip4_0_tos;
+ }
+
+ l3_0 = (u8 *) ip4_0;
+ udp0 = &hdr->udp;
+ }
+ else /* ip6 path */
+ {
+ ip6_vxlan_header_t *hdr = underlay0;
+
+ /* Fix IP6 payload length */
+ ip6_0 = &hdr->ip6;
+ ip6_0->payload_length = payload_l0;
+
+ l3_0 = (u8 *) ip6_0;
+ udp0 = &hdr->udp;
+ }
+
+ /* Fix UDP length and set source port */
+ udp0->length = payload_l0;
+ udp0->src_port = flow_hash0;
+
+ if (b0->flags & VNET_BUFFER_F_OFFLOAD)
+ {
+ vnet_buffer2 (b0)->outer_l3_hdr_offset = l3_0 - b0->data;
+ vnet_buffer2 (b0)->outer_l4_hdr_offset = (u8 *) udp0 - b0->data;
+ vnet_buffer_offload_flags_set (b0,
+ outer_packet_csum_offload_flags);
+ }
+ /* IPv4 checksum only */
+ else if (is_ip4)
+ {
+ ip_csum_t sum0 = ip4_0->checksum;
+ sum0 = ip_csum_update (sum0, 0, ip4_0->length, ip4_header_t,
+ length /* changed member */);
+ if (PREDICT_FALSE (ip4_0_tos))
+ {
+ sum0 = ip_csum_update (sum0, 0, ip4_0_tos, ip4_header_t,
+ tos /* changed member */);
+ }
+ ip4_0->checksum = ip_csum_fold (sum0);
+ }
+ /* IPv6 UDP checksum is mandatory */
+ else
+ {
+ int bogus = 0;
+
+ udp0->checksum = ip6_tcp_udp_icmp_compute_checksum
+ (vm, b0, ip6_0, &bogus);
+ ASSERT (bogus == 0);
+ if (udp0->checksum == 0)
+ udp0->checksum = 0xffff;
+ }
+
+ /* reuse inner packet flow_hash for load-balance node */
+ vnet_buffer (b0)->ip.flow_hash = flow_hash0;
+
+ vlib_increment_combined_counter (tx_counter, thread_index,
+ sw_if_index0, 1, len0);
+ pkts_encapsulated++;
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_encap_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof (*tr));
+ tr->tunnel_index = t0 - vxm->tunnels;
+ tr->vni = t0->vni;
+ }
+ 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);
+ }
+
+ /* Do we still need this now that tunnel tx stats is kept? */
+ vlib_node_increment_counter (vm, node->node_index,
+ VXLAN_ENCAP_ERROR_ENCAPSULATED,
+ pkts_encapsulated);
+
+ return from_frame->n_vectors;
+}
+
+VLIB_NODE_FN (vxlan4_encap_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ /* Disable chksum offload as setup overhead in tx node is not worthwhile
+ for ip4 header checksum only, unless udp checksum is also required */
+ return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 1);
+}
+
+VLIB_NODE_FN (vxlan6_encap_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ /* Enable checksum offload for ip6 as udp checksum is mandatory, */
+ return vxlan_encap_inline (vm, node, from_frame, /* is_ip4 */ 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vxlan4_encap_node) = {
+ .name = "vxlan4-encap",
+ .vector_size = sizeof (u32),
+ .format_trace = format_vxlan_encap_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(vxlan_encap_error_strings),
+ .error_strings = vxlan_encap_error_strings,
+ .n_next_nodes = VXLAN_ENCAP_N_NEXT,
+ .next_nodes = {
+ [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
+ },
+};
+
+VLIB_REGISTER_NODE (vxlan6_encap_node) = {
+ .name = "vxlan6-encap",
+ .vector_size = sizeof (u32),
+ .format_trace = format_vxlan_encap_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(vxlan_encap_error_strings),
+ .error_strings = vxlan_encap_error_strings,
+ .n_next_nodes = VXLAN_ENCAP_N_NEXT,
+ .next_nodes = {
+ [VXLAN_ENCAP_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/vxlan/plugin.c b/src/plugins/vxlan/plugin.c
new file mode 100644
index 00000000000..aaeafb03a3b
--- /dev/null
+++ b/src/plugins/vxlan/plugin.c
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) 2022 Cisco Systems, Inc.
+ * License: Cisco Proprietary Closed Source License - Cisco Internal.
+ * The software, documentation and any fonts accompanying this License whether
+ * on disk, in read only memory, on any other media or in any other form (col-
+ * lectively the “Software”) are licensed, not sold, to you by Cisco, Inc.
+ * (“Cisco”) for use only under the terms of this License, and Cisco reserves
+ * all rights not expressly granted to you. The rights granted herein are
+ * limited to Cisco’s intel- lectual property rights in the Cisco Software and
+ * do not include any other patents or intellectual property rights. You own
+ * the media on which the Cisco Software is recorded but Cisco and/or Cisco’s
+ * licensor(s) retain ownership of the Software itself.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+
+VLIB_PLUGIN_REGISTER () = {
+ .version = VPP_BUILD_VER,
+ .description = "VxLan Tunnels",
+};
diff --git a/src/plugins/vxlan/vxlan.api b/src/plugins/vxlan/vxlan.api
new file mode 100644
index 00000000000..b7e678595d8
--- /dev/null
+++ b/src/plugins/vxlan/vxlan.api
@@ -0,0 +1,198 @@
+/*
+ * Copyright (c) 2015-2016 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.
+ */
+
+option version = "2.1.0";
+
+import "vnet/interface_types.api";
+import "vnet/ip/ip_types.api";
+
+/** \brief Create or delete a VXLAN tunnel
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param is_add - Use 1 to create the tunnel, 0 to remove it
+ @param instance - optional unique custom device instance, else ~0.
+ @param src_address - Source IP address
+ @param dst_address - Destination IP address, can be multicast
+ @param mcast_sw_if_index - Interface for multicast destination
+ @param encap_vrf_id - Encap route table FIB index
+ @param decap_next_index - index of decap next graph node
+ @param vni - The VXLAN Network Identifier, uint24
+*/
+define vxlan_add_del_tunnel
+{
+ u32 client_index;
+ u32 context;
+ bool is_add [default=true];
+ u32 instance; /* If non-~0, specifies a custom dev instance */
+ vl_api_address_t src_address;
+ vl_api_address_t dst_address;
+ vl_api_interface_index_t mcast_sw_if_index;
+ u32 encap_vrf_id;
+ u32 decap_next_index;
+ u32 vni;
+};
+
+/** \brief Create or delete a VXLAN tunnel
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param is_add - Use 1 to create the tunnel, 0 to remove it
+ @param instance - optional unique custom device instance, else ~0.
+ @param src_address - Source IP address
+ @param dst_address - Destination IP address, can be multicast
+ @param src_port - Source UDP port. It is not included in sent packets. Used only for port registration
+ @param dst_port - Destination UDP port
+ @param mcast_sw_if_index - Interface for multicast destination
+ @param encap_vrf_id - Encap route table FIB index
+ @param decap_next_index - index of decap next graph node
+ @param vni - The VXLAN Network Identifier, uint24
+*/
+define vxlan_add_del_tunnel_v2
+{
+ u32 client_index;
+ u32 context;
+ bool is_add [default=true];
+ u32 instance [default=0xffffffff]; /* If non-~0, specifies a custom dev instance */
+ vl_api_address_t src_address;
+ vl_api_address_t dst_address;
+ u16 src_port;
+ u16 dst_port;
+ vl_api_interface_index_t mcast_sw_if_index;
+ u32 encap_vrf_id;
+ u32 decap_next_index;
+ u32 vni;
+};
+
+/** \brief Create or delete a VXLAN tunnel
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param is_add - Use 1 to create the tunnel, 0 to remove it
+ @param instance - optional unique custom device instance, else ~0.
+ @param src_address - Source IP address
+ @param dst_address - Destination IP address, can be multicast
+ @param src_port - Source UDP port. It is not included in sent packets. Used only for port registration
+ @param dst_port - Destination UDP port
+ @param mcast_sw_if_index - Interface for multicast destination
+ @param encap_vrf_id - Encap route table FIB index
+ @param decap_next_index - index of decap next graph node
+ @param vni - The VXLAN Network Identifier, uint24
+ @param is_l3 - if true, create the interface in L3 mode, w/o MAC
+*/
+define vxlan_add_del_tunnel_v3
+{
+ u32 client_index;
+ u32 context;
+ bool is_add [default=true];
+ u32 instance [default=0xffffffff]; /* If non-~0, specifies a custom dev instance */
+ vl_api_address_t src_address;
+ vl_api_address_t dst_address;
+ u16 src_port;
+ u16 dst_port;
+ vl_api_interface_index_t mcast_sw_if_index;
+ u32 encap_vrf_id;
+ u32 decap_next_index;
+ u32 vni;
+ bool is_l3 [default=false];
+};
+
+define vxlan_add_del_tunnel_reply
+{
+ u32 context;
+ i32 retval;
+ vl_api_interface_index_t sw_if_index;
+};
+define vxlan_add_del_tunnel_v2_reply
+{
+ u32 context;
+ i32 retval;
+ vl_api_interface_index_t sw_if_index;
+};
+define vxlan_add_del_tunnel_v3_reply
+{
+ u32 context;
+ i32 retval;
+ vl_api_interface_index_t sw_if_index;
+};
+
+define vxlan_tunnel_dump
+{
+ u32 client_index;
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+};
+define vxlan_tunnel_v2_dump
+{
+ u32 client_index;
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+};
+
+define vxlan_tunnel_details
+{
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+ u32 instance;
+ vl_api_address_t src_address;
+ vl_api_address_t dst_address;
+ vl_api_interface_index_t mcast_sw_if_index;
+ u32 encap_vrf_id;
+ u32 decap_next_index;
+ u32 vni;
+};
+define vxlan_tunnel_v2_details
+{
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+ u32 instance;
+ vl_api_address_t src_address;
+ vl_api_address_t dst_address;
+ u16 src_port;
+ u16 dst_port;
+ vl_api_interface_index_t mcast_sw_if_index;
+ u32 encap_vrf_id;
+ u32 decap_next_index;
+ u32 vni;
+};
+
+/** \brief Interface set vxlan-bypass request
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param sw_if_index - interface used to reach neighbor
+ @param is_ipv6 - if non-zero, enable ipv6-vxlan-bypass, else ipv4-vxlan-bypass
+ @param enable - if non-zero enable, else disable
+*/
+autoreply define sw_interface_set_vxlan_bypass
+{
+ u32 client_index;
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+ bool is_ipv6;
+ bool enable [default=true];
+};
+
+/** \brief Offload vxlan rx request
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param hw_if_index - rx hw interface
+ @param sw_if_index - vxlan interface to offload
+ @param enable - if non-zero enable, else disable
+*/
+autoreply define vxlan_offload_rx
+{
+ u32 client_index;
+ u32 context;
+ vl_api_interface_index_t hw_if_index;
+ vl_api_interface_index_t sw_if_index;
+ bool enable [default=true];
+};
diff --git a/src/plugins/vxlan/vxlan.c b/src/plugins/vxlan/vxlan.c
new file mode 100644
index 00000000000..f1ab7a7cb8b
--- /dev/null
+++ b/src/plugins/vxlan/vxlan.c
@@ -0,0 +1,1349 @@
+/*
+ * 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.
+ */
+#include <vxlan/vxlan.h>
+#include <vnet/ip/format.h>
+#include <vnet/fib/fib_entry.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/fib/fib_entry_track.h>
+#include <vnet/mfib/mfib_table.h>
+#include <vnet/adj/adj_mcast.h>
+#include <vnet/adj/rewrite.h>
+#include <vnet/dpo/drop_dpo.h>
+#include <vnet/interface.h>
+#include <vnet/flow/flow.h>
+#include <vnet/udp/udp_local.h>
+#include <vlib/vlib.h>
+
+/**
+ * @file
+ * @brief VXLAN.
+ *
+ * VXLAN provides the features needed to allow L2 bridge domains (BDs)
+ * to span multiple servers. This is done by building an L2 overlay on
+ * top of an L3 network underlay using VXLAN tunnels.
+ *
+ * This makes it possible for servers to be co-located in the same data
+ * center or be separated geographically as long as they are reachable
+ * through the underlay L3 network.
+ *
+ * You can refer to this kind of L2 overlay bridge domain as a VXLAN
+ * (Virtual eXtensible VLAN) segment.
+ */
+
+
+vxlan_main_t vxlan_main;
+
+static u32
+vxlan_eth_flag_change (vnet_main_t *vnm, vnet_hw_interface_t *hi, u32 flags)
+{
+ /* nothing for now */
+ return 0;
+}
+
+static clib_error_t *
+vxlan_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hw,
+ u32 frame_size)
+{
+ /* nothing for now */
+ return 0;
+}
+
+static u8 *
+format_decap_next (u8 * s, va_list * args)
+{
+ u32 next_index = va_arg (*args, u32);
+
+ if (next_index == VXLAN_INPUT_NEXT_DROP)
+ return format (s, "drop");
+ else
+ return format (s, "index %d", next_index);
+ return s;
+}
+
+u8 *
+format_vxlan_tunnel (u8 * s, va_list * args)
+{
+ vxlan_tunnel_t *t = va_arg (*args, vxlan_tunnel_t *);
+
+ s = format (s,
+ "[%d] instance %d src %U dst %U src_port %d dst_port %d vni %d "
+ "fib-idx %d sw-if-idx %d ",
+ t->dev_instance, t->user_instance, format_ip46_address, &t->src,
+ IP46_TYPE_ANY, format_ip46_address, &t->dst, IP46_TYPE_ANY,
+ t->src_port, t->dst_port, t->vni, t->encap_fib_index,
+ t->sw_if_index);
+
+ s = format (s, "encap-dpo-idx %d ", t->next_dpo.dpoi_index);
+
+ if (PREDICT_FALSE (t->decap_next_index != VXLAN_INPUT_NEXT_L2_INPUT))
+ s = format (s, "decap-next-%U ", format_decap_next, t->decap_next_index);
+
+ if (PREDICT_FALSE (ip46_address_is_multicast (&t->dst)))
+ s = format (s, "mcast-sw-if-idx %d ", t->mcast_sw_if_index);
+
+ if (t->flow_index != ~0)
+ s = format (s, "flow-index %d [%U]", t->flow_index,
+ format_flow_enabled_hw, t->flow_index);
+
+ return s;
+}
+
+static u8 *
+format_vxlan_name (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ vxlan_main_t *vxm = &vxlan_main;
+ vxlan_tunnel_t *t;
+
+ if (dev_instance == ~0)
+ return format (s, "<cached-unused>");
+
+ if (dev_instance >= vec_len (vxm->tunnels))
+ return format (s, "<improperly-referenced>");
+
+ t = pool_elt_at_index (vxm->tunnels, dev_instance);
+
+ return format (s, "vxlan_tunnel%d", t->user_instance);
+}
+
+static clib_error_t *
+vxlan_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+ u32 hw_flags = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ?
+ VNET_HW_INTERFACE_FLAG_LINK_UP : 0;
+ vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
+
+ return /* no error */ 0;
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (vxlan_device_class, static) = {
+ .name = "VXLAN",
+ .format_device_name = format_vxlan_name,
+ .format_tx_trace = format_vxlan_encap_trace,
+ .admin_up_down_function = vxlan_interface_admin_up_down,
+};
+/* *INDENT-ON* */
+
+static u8 *
+format_vxlan_header_with_length (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ s = format (s, "unimplemented dev %u", dev_instance);
+ return s;
+}
+
+/* *INDENT-OFF* */
+VNET_HW_INTERFACE_CLASS (vxlan_hw_class) = {
+ .name = "VXLAN",
+ .format_header = format_vxlan_header_with_length,
+ .build_rewrite = default_build_rewrite,
+};
+/* *INDENT-ON* */
+
+static void
+vxlan_tunnel_restack_dpo (vxlan_tunnel_t * t)
+{
+ u8 is_ip4 = ip46_address_is_ip4 (&t->dst);
+ dpo_id_t dpo = DPO_INVALID;
+ fib_forward_chain_type_t forw_type = is_ip4 ?
+ FIB_FORW_CHAIN_TYPE_UNICAST_IP4 : FIB_FORW_CHAIN_TYPE_UNICAST_IP6;
+
+ fib_entry_contribute_forwarding (t->fib_entry_index, forw_type, &dpo);
+
+ /* vxlan uses the payload hash as the udp source port
+ * hence the packet's hash is unknown
+ * skip single bucket load balance dpo's */
+ while (DPO_LOAD_BALANCE == dpo.dpoi_type)
+ {
+ const load_balance_t *lb;
+ const dpo_id_t *choice;
+
+ lb = load_balance_get (dpo.dpoi_index);
+ if (lb->lb_n_buckets > 1)
+ break;
+
+ choice = load_balance_get_bucket_i (lb, 0);
+
+ if (DPO_RECEIVE == choice->dpoi_type)
+ dpo_copy (&dpo, drop_dpo_get (choice->dpoi_proto));
+ else
+ dpo_copy (&dpo, choice);
+ }
+
+ u32 encap_index = is_ip4 ?
+ vxlan4_encap_node.index : vxlan6_encap_node.index;
+ dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
+ dpo_reset (&dpo);
+}
+
+static vxlan_tunnel_t *
+vxlan_tunnel_from_fib_node (fib_node_t * node)
+{
+ ASSERT (FIB_NODE_TYPE_VXLAN_TUNNEL == node->fn_type);
+ return ((vxlan_tunnel_t *) (((char *) node) -
+ STRUCT_OFFSET_OF (vxlan_tunnel_t, node)));
+}
+
+/**
+ * Function definition to backwalk a FIB node -
+ * Here we will restack the new dpo of VXLAN DIP to encap node.
+ */
+static fib_node_back_walk_rc_t
+vxlan_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
+{
+ vxlan_tunnel_restack_dpo (vxlan_tunnel_from_fib_node (node));
+ return (FIB_NODE_BACK_WALK_CONTINUE);
+}
+
+/**
+ * Function definition to get a FIB node from its index
+ */
+static fib_node_t *
+vxlan_tunnel_fib_node_get (fib_node_index_t index)
+{
+ vxlan_tunnel_t *t;
+ vxlan_main_t *vxm = &vxlan_main;
+
+ t = pool_elt_at_index (vxm->tunnels, index);
+
+ return (&t->node);
+}
+
+/**
+ * Function definition to inform the FIB node that its last lock has gone.
+ */
+static void
+vxlan_tunnel_last_lock_gone (fib_node_t * node)
+{
+ /*
+ * The VXLAN tunnel is a root of the graph. As such
+ * it never has children and thus is never locked.
+ */
+ ASSERT (0);
+}
+
+/*
+ * Virtual function table registered by VXLAN tunnels
+ * for participation in the FIB object graph.
+ */
+const static fib_node_vft_t vxlan_vft = {
+ .fnv_get = vxlan_tunnel_fib_node_get,
+ .fnv_last_lock = vxlan_tunnel_last_lock_gone,
+ .fnv_back_walk = vxlan_tunnel_back_walk,
+};
+
+#define foreach_copy_field \
+ _ (vni) \
+ _ (mcast_sw_if_index) \
+ _ (encap_fib_index) \
+ _ (decap_next_index) \
+ _ (src) \
+ _ (dst) \
+ _ (src_port) \
+ _ (dst_port)
+
+static void
+vxlan_rewrite (vxlan_tunnel_t * t, bool is_ip6)
+{
+ union
+ {
+ ip4_vxlan_header_t h4;
+ ip6_vxlan_header_t h6;
+ } h;
+ int len = is_ip6 ? sizeof h.h6 : sizeof h.h4;
+
+ udp_header_t *udp;
+ vxlan_header_t *vxlan;
+ /* Fixed portion of the (outer) ip header */
+
+ clib_memset (&h, 0, sizeof (h));
+ if (!is_ip6)
+ {
+ ip4_header_t *ip = &h.h4.ip4;
+ udp = &h.h4.udp, vxlan = &h.h4.vxlan;
+ ip->ip_version_and_header_length = 0x45;
+ ip->ttl = 254;
+ ip->protocol = IP_PROTOCOL_UDP;
+
+ ip->src_address = t->src.ip4;
+ ip->dst_address = t->dst.ip4;
+
+ /* we fix up the ip4 header length and checksum after-the-fact */
+ ip->checksum = ip4_header_checksum (ip);
+ }
+ else
+ {
+ ip6_header_t *ip = &h.h6.ip6;
+ udp = &h.h6.udp, vxlan = &h.h6.vxlan;
+ ip->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 (6 << 28);
+ ip->hop_limit = 255;
+ ip->protocol = IP_PROTOCOL_UDP;
+
+ ip->src_address = t->src.ip6;
+ ip->dst_address = t->dst.ip6;
+ }
+
+ /* UDP header, randomize src port on something, maybe? */
+ udp->src_port = clib_host_to_net_u16 (t->src_port);
+ udp->dst_port = clib_host_to_net_u16 (t->dst_port);
+
+ /* VXLAN header */
+ vnet_set_vni_and_flags (vxlan, t->vni);
+ vnet_rewrite_set_data (*t, &h, len);
+}
+
+static bool
+vxlan_decap_next_is_valid (vxlan_main_t * vxm, u32 is_ip6,
+ u32 decap_next_index)
+{
+ vlib_main_t *vm = vxm->vlib_main;
+ u32 input_idx = (!is_ip6) ?
+ vxlan4_input_node.index : vxlan6_input_node.index;
+ vlib_node_runtime_t *r = vlib_node_get_runtime (vm, input_idx);
+
+ return decap_next_index < r->n_next_nodes;
+}
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED(union
+{
+ struct
+ {
+ fib_node_index_t mfib_entry_index;
+ adj_index_t mcast_adj_index;
+ };
+ u64 as_u64;
+}) mcast_shared_t;
+/* *INDENT-ON* */
+
+static inline mcast_shared_t
+mcast_shared_get (ip46_address_t * ip)
+{
+ ASSERT (ip46_address_is_multicast (ip));
+ uword *p = hash_get_mem (vxlan_main.mcast_shared, ip);
+ ALWAYS_ASSERT (p);
+ mcast_shared_t ret = {.as_u64 = *p };
+ return ret;
+}
+
+static inline void
+mcast_shared_add (ip46_address_t * dst, fib_node_index_t mfei, adj_index_t ai)
+{
+ mcast_shared_t new_ep = {
+ .mcast_adj_index = ai,
+ .mfib_entry_index = mfei,
+ };
+
+ hash_set_mem_alloc (&vxlan_main.mcast_shared, dst, new_ep.as_u64);
+}
+
+static inline void
+mcast_shared_remove (ip46_address_t * dst)
+{
+ mcast_shared_t ep = mcast_shared_get (dst);
+
+ adj_unlock (ep.mcast_adj_index);
+ mfib_table_entry_delete_index (ep.mfib_entry_index, MFIB_SOURCE_VXLAN);
+
+ hash_unset_mem_free (&vxlan_main.mcast_shared, dst);
+}
+
+int vnet_vxlan_add_del_tunnel
+ (vnet_vxlan_add_del_tunnel_args_t * a, u32 * sw_if_indexp)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+ vnet_main_t *vnm = vxm->vnet_main;
+ vxlan_decap_info_t *p;
+ u32 sw_if_index = ~0;
+ vxlan4_tunnel_key_t key4;
+ vxlan6_tunnel_key_t key6;
+ u32 is_ip6 = a->is_ip6;
+ vlib_main_t *vm = vlib_get_main ();
+ u8 hw_addr[6];
+
+ /* Set udp-ports */
+ if (a->src_port == 0)
+ a->src_port = is_ip6 ? UDP_DST_PORT_vxlan6 : UDP_DST_PORT_vxlan;
+
+ if (a->dst_port == 0)
+ a->dst_port = is_ip6 ? UDP_DST_PORT_vxlan6 : UDP_DST_PORT_vxlan;
+
+ int not_found;
+ if (!is_ip6)
+ {
+ /* ip4 mcast is indexed by mcast addr only */
+ key4.key[0] = ip46_address_is_multicast (&a->dst) ?
+ a->dst.ip4.as_u32 :
+ a->dst.ip4.as_u32 | (((u64) a->src.ip4.as_u32) << 32);
+ key4.key[1] = ((u64) clib_host_to_net_u16 (a->src_port) << 48) |
+ (((u64) a->encap_fib_index) << 32) |
+ clib_host_to_net_u32 (a->vni << 8);
+ not_found =
+ clib_bihash_search_inline_16_8 (&vxm->vxlan4_tunnel_by_key, &key4);
+ p = (void *) &key4.value;
+ }
+ else
+ {
+ key6.key[0] = a->dst.ip6.as_u64[0];
+ key6.key[1] = a->dst.ip6.as_u64[1];
+ key6.key[2] = (((u64) clib_host_to_net_u16 (a->src_port) << 48) |
+ ((u64) a->encap_fib_index) << 32) |
+ clib_host_to_net_u32 (a->vni << 8);
+ not_found =
+ clib_bihash_search_inline_24_8 (&vxm->vxlan6_tunnel_by_key, &key6);
+ p = (void *) &key6.value;
+ }
+
+ if (not_found)
+ p = 0;
+
+ if (a->is_add)
+ {
+ l2input_main_t *l2im = &l2input_main;
+ u32 dev_instance; /* real dev instance tunnel index */
+ u32 user_instance; /* request and actual instance number */
+
+ /* adding a tunnel: tunnel must not already exist */
+ if (p)
+ return VNET_API_ERROR_TUNNEL_EXIST;
+
+ /*if not set explicitly, default to l2 */
+ if (a->decap_next_index == ~0)
+ a->decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
+ if (!vxlan_decap_next_is_valid (vxm, is_ip6, a->decap_next_index))
+ return VNET_API_ERROR_INVALID_DECAP_NEXT;
+
+ vxlan_tunnel_t *t;
+ pool_get_aligned (vxm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+ clib_memset (t, 0, sizeof (*t));
+ dev_instance = t - vxm->tunnels;
+
+ /* copy from arg structure */
+#define _(x) t->x = a->x;
+ foreach_copy_field;
+#undef _
+
+ vxlan_rewrite (t, is_ip6);
+ /*
+ * Reconcile the real dev_instance and a possible requested instance.
+ */
+ user_instance = a->instance;
+ if (user_instance == ~0)
+ user_instance = dev_instance;
+ if (hash_get (vxm->instance_used, user_instance))
+ {
+ pool_put (vxm->tunnels, t);
+ return VNET_API_ERROR_INSTANCE_IN_USE;
+ }
+
+ hash_set (vxm->instance_used, user_instance, 1);
+
+ t->dev_instance = dev_instance; /* actual */
+ t->user_instance = user_instance; /* name */
+ t->flow_index = ~0;
+
+ if (a->is_l3)
+ t->hw_if_index =
+ vnet_register_interface (vnm, vxlan_device_class.index, dev_instance,
+ vxlan_hw_class.index, dev_instance);
+ else
+ {
+ vnet_eth_interface_registration_t eir = {};
+ f64 now = vlib_time_now (vm);
+ u32 rnd;
+ rnd = (u32) (now * 1e6);
+ rnd = random_u32 (&rnd);
+ memcpy (hw_addr + 2, &rnd, sizeof (rnd));
+ hw_addr[0] = 2;
+ hw_addr[1] = 0xfe;
+
+ eir.dev_class_index = vxlan_device_class.index;
+ eir.dev_instance = dev_instance;
+ eir.address = hw_addr;
+ eir.cb.flag_change = vxlan_eth_flag_change;
+ eir.cb.set_max_frame_size = vxlan_eth_set_max_frame_size;
+ t->hw_if_index = vnet_eth_register_interface (vnm, &eir);
+ }
+
+ vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, t->hw_if_index);
+
+ /* Set vxlan tunnel output node */
+ u32 encap_index = !is_ip6 ?
+ vxlan4_encap_node.index : vxlan6_encap_node.index;
+ vnet_set_interface_output_node (vnm, t->hw_if_index, encap_index);
+
+ t->sw_if_index = sw_if_index = hi->sw_if_index;
+
+ /* copy the key */
+ int add_failed;
+ if (is_ip6)
+ {
+ key6.value = (u64) dev_instance;
+ add_failed = clib_bihash_add_del_24_8 (&vxm->vxlan6_tunnel_by_key,
+ &key6, 1 /*add */ );
+ }
+ else
+ {
+ vxlan_decap_info_t di = {.sw_if_index = t->sw_if_index, };
+ if (ip46_address_is_multicast (&t->dst))
+ di.local_ip = t->src.ip4;
+ else
+ di.next_index = t->decap_next_index;
+ key4.value = di.as_u64;
+ add_failed = clib_bihash_add_del_16_8 (&vxm->vxlan4_tunnel_by_key,
+ &key4, 1 /*add */ );
+ }
+
+ if (add_failed)
+ {
+ if (a->is_l3)
+ vnet_delete_hw_interface (vnm, t->hw_if_index);
+ else
+ ethernet_delete_interface (vnm, t->hw_if_index);
+ hash_unset (vxm->instance_used, t->user_instance);
+ pool_put (vxm->tunnels, t);
+ return VNET_API_ERROR_INVALID_REGISTRATION;
+ }
+
+ vec_validate_init_empty (vxm->tunnel_index_by_sw_if_index, sw_if_index,
+ ~0);
+ vxm->tunnel_index_by_sw_if_index[sw_if_index] = dev_instance;
+
+ /* setup l2 input config with l2 feature and bd 0 to drop packet */
+ vec_validate (l2im->configs, sw_if_index);
+ l2im->configs[sw_if_index].feature_bitmap = L2INPUT_FEAT_DROP;
+ l2im->configs[sw_if_index].bd_index = 0;
+
+ vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+ si->flags &= ~VNET_SW_INTERFACE_FLAG_HIDDEN;
+ vnet_sw_interface_set_flags (vnm, sw_if_index,
+ VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+
+ fib_node_init (&t->node, FIB_NODE_TYPE_VXLAN_TUNNEL);
+ fib_prefix_t tun_dst_pfx;
+ vnet_flood_class_t flood_class = VNET_FLOOD_CLASS_TUNNEL_NORMAL;
+
+ fib_protocol_t fp = fib_ip_proto (is_ip6);
+ fib_prefix_from_ip46_addr (fp, &t->dst, &tun_dst_pfx);
+ if (!ip46_address_is_multicast (&t->dst))
+ {
+ /* Unicast tunnel -
+ * source the FIB entry for the tunnel's destination
+ * and become a child thereof. The tunnel will then get poked
+ * when the forwarding for the entry updates, and the tunnel can
+ * re-stack accordingly
+ */
+ vtep_addr_ref (&vxm->vtep_table, t->encap_fib_index, &t->src);
+ t->fib_entry_index = fib_entry_track (t->encap_fib_index,
+ &tun_dst_pfx,
+ FIB_NODE_TYPE_VXLAN_TUNNEL,
+ dev_instance,
+ &t->sibling_index);
+ vxlan_tunnel_restack_dpo (t);
+ }
+ else
+ {
+ /* Multicast tunnel -
+ * as the same mcast group can be used for multiple mcast tunnels
+ * with different VNIs, create the output fib adjacency only if
+ * it does not already exist
+ */
+ if (vtep_addr_ref (&vxm->vtep_table,
+ t->encap_fib_index, &t->dst) == 1)
+ {
+ fib_node_index_t mfei;
+ adj_index_t ai;
+ fib_route_path_t path = {
+ .frp_proto = fib_proto_to_dpo (fp),
+ .frp_addr = zero_addr,
+ .frp_sw_if_index = 0xffffffff,
+ .frp_fib_index = ~0,
+ .frp_weight = 1,
+ .frp_flags = FIB_ROUTE_PATH_LOCAL,
+ .frp_mitf_flags = MFIB_ITF_FLAG_FORWARD,
+ };
+ const mfib_prefix_t mpfx = {
+ .fp_proto = fp,
+ .fp_len = (is_ip6 ? 128 : 32),
+ .fp_grp_addr = tun_dst_pfx.fp_addr,
+ };
+
+ /*
+ * Setup the (*,G) to receive traffic on the mcast group
+ * - the forwarding interface is for-us
+ * - the accepting interface is that from the API
+ */
+ mfib_table_entry_path_update (t->encap_fib_index, &mpfx,
+ MFIB_SOURCE_VXLAN,
+ MFIB_ENTRY_FLAG_NONE, &path);
+
+ path.frp_sw_if_index = a->mcast_sw_if_index;
+ path.frp_flags = FIB_ROUTE_PATH_FLAG_NONE;
+ path.frp_mitf_flags = MFIB_ITF_FLAG_ACCEPT;
+ mfei = mfib_table_entry_path_update (
+ t->encap_fib_index, &mpfx, MFIB_SOURCE_VXLAN,
+ MFIB_ENTRY_FLAG_NONE, &path);
+
+ /*
+ * Create the mcast adjacency to send traffic to the group
+ */
+ ai = adj_mcast_add_or_lock (fp,
+ fib_proto_to_link (fp),
+ a->mcast_sw_if_index);
+
+ /*
+ * create a new end-point
+ */
+ mcast_shared_add (&t->dst, mfei, ai);
+ }
+
+ dpo_id_t dpo = DPO_INVALID;
+ mcast_shared_t ep = mcast_shared_get (&t->dst);
+
+ /* Stack shared mcast dst mac addr rewrite on encap */
+ dpo_set (&dpo, DPO_ADJACENCY_MCAST,
+ fib_proto_to_dpo (fp), ep.mcast_adj_index);
+
+ dpo_stack_from_node (encap_index, &t->next_dpo, &dpo);
+ dpo_reset (&dpo);
+ flood_class = VNET_FLOOD_CLASS_TUNNEL_MASTER;
+ }
+
+ vnet_get_sw_interface (vnet_get_main (), sw_if_index)->flood_class =
+ flood_class;
+ }
+ else
+ {
+ /* deleting a tunnel: tunnel must exist */
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ u32 instance = is_ip6 ? key6.value :
+ vxm->tunnel_index_by_sw_if_index[p->sw_if_index];
+ vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, instance);
+
+ sw_if_index = t->sw_if_index;
+ vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
+
+ vxm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
+
+ if (!is_ip6)
+ clib_bihash_add_del_16_8 (&vxm->vxlan4_tunnel_by_key, &key4,
+ 0 /*del */ );
+ else
+ clib_bihash_add_del_24_8 (&vxm->vxlan6_tunnel_by_key, &key6,
+ 0 /*del */ );
+
+ if (!ip46_address_is_multicast (&t->dst))
+ {
+ if (t->flow_index != ~0)
+ vnet_flow_del (vnm, t->flow_index);
+
+ vtep_addr_unref (&vxm->vtep_table, t->encap_fib_index, &t->src);
+ fib_entry_untrack (t->fib_entry_index, t->sibling_index);
+ }
+ else if (vtep_addr_unref (&vxm->vtep_table,
+ t->encap_fib_index, &t->dst) == 0)
+ {
+ mcast_shared_remove (&t->dst);
+ }
+
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, t->hw_if_index);
+ if (hw->dev_class_index == vxlan_device_class.index)
+ vnet_delete_hw_interface (vnm, t->hw_if_index);
+ else
+ ethernet_delete_interface (vnm, t->hw_if_index);
+ hash_unset (vxm->instance_used, t->user_instance);
+
+ fib_node_deinit (&t->node);
+ pool_put (vxm->tunnels, t);
+ }
+
+ if (sw_if_indexp)
+ *sw_if_indexp = sw_if_index;
+
+ if (a->is_add)
+ {
+ /* register udp ports */
+ if (!is_ip6 && !udp_is_valid_dst_port (a->src_port, 1))
+ udp_register_dst_port (vxm->vlib_main, a->src_port,
+ vxlan4_input_node.index, 1);
+ if (is_ip6 && !udp_is_valid_dst_port (a->src_port, 0))
+ udp_register_dst_port (vxm->vlib_main, a->src_port,
+ vxlan6_input_node.index, 0);
+ }
+
+ return 0;
+}
+
+static uword
+get_decap_next_for_node (u32 node_index, u32 ipv4_set)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+ vlib_main_t *vm = vxm->vlib_main;
+ uword input_node = (ipv4_set) ? vxlan4_input_node.index :
+ vxlan6_input_node.index;
+
+ return vlib_node_add_next (vm, input_node, node_index);
+}
+
+static uword
+unformat_decap_next (unformat_input_t * input, va_list * args)
+{
+ u32 *result = va_arg (*args, u32 *);
+ u32 ipv4_set = va_arg (*args, int);
+ vxlan_main_t *vxm = &vxlan_main;
+ vlib_main_t *vm = vxm->vlib_main;
+ u32 node_index;
+ u32 tmp;
+
+ if (unformat (input, "l2"))
+ *result = VXLAN_INPUT_NEXT_L2_INPUT;
+ else if (unformat (input, "node %U", unformat_vlib_node, vm, &node_index))
+ *result = get_decap_next_for_node (node_index, ipv4_set);
+ else if (unformat (input, "%d", &tmp))
+ *result = tmp;
+ else
+ return 0;
+ return 1;
+}
+
+static clib_error_t *
+vxlan_add_del_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ ip46_address_t src = ip46_address_initializer, dst =
+ ip46_address_initializer;
+ u8 is_add = 1;
+ u8 src_set = 0;
+ u8 dst_set = 0;
+ u8 grp_set = 0;
+ u8 ipv4_set = 0;
+ u8 ipv6_set = 0;
+ u8 is_l3 = 0;
+ u32 instance = ~0;
+ u32 encap_fib_index = 0;
+ u32 mcast_sw_if_index = ~0;
+ u32 decap_next_index = VXLAN_INPUT_NEXT_L2_INPUT;
+ u32 vni = 0;
+ u32 src_port = 0;
+ u32 dst_port = 0;
+ u32 table_id;
+ clib_error_t *parse_error = NULL;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "del"))
+ {
+ is_add = 0;
+ }
+ else if (unformat (line_input, "instance %d", &instance))
+ ;
+ else if (unformat (line_input, "src %U",
+ unformat_ip46_address, &src, IP46_TYPE_ANY))
+ {
+ src_set = 1;
+ ip46_address_is_ip4 (&src) ? (ipv4_set = 1) : (ipv6_set = 1);
+ }
+ else if (unformat (line_input, "dst %U",
+ unformat_ip46_address, &dst, IP46_TYPE_ANY))
+ {
+ dst_set = 1;
+ ip46_address_is_ip4 (&dst) ? (ipv4_set = 1) : (ipv6_set = 1);
+ }
+ else if (unformat (line_input, "group %U %U",
+ unformat_ip46_address, &dst, IP46_TYPE_ANY,
+ unformat_vnet_sw_interface,
+ vnet_get_main (), &mcast_sw_if_index))
+ {
+ grp_set = dst_set = 1;
+ ip46_address_is_ip4 (&dst) ? (ipv4_set = 1) : (ipv6_set = 1);
+ }
+ else if (unformat (line_input, "encap-vrf-id %d", &table_id))
+ {
+ encap_fib_index =
+ fib_table_find (fib_ip_proto (ipv6_set), table_id);
+ }
+ else if (unformat (line_input, "l3"))
+ is_l3 = 1;
+ else if (unformat (line_input, "decap-next %U", unformat_decap_next,
+ &decap_next_index, ipv4_set))
+ ;
+ else if (unformat (line_input, "vni %d", &vni))
+ ;
+ else if (unformat (line_input, "src_port %d", &src_port))
+ ;
+ else if (unformat (line_input, "dst_port %d", &dst_port))
+ ;
+ else
+ {
+ parse_error = clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ break;
+ }
+ }
+
+ unformat_free (line_input);
+
+ if (parse_error)
+ return parse_error;
+
+ if (is_l3 && decap_next_index == VXLAN_INPUT_NEXT_L2_INPUT)
+ {
+ vlib_node_t *node = vlib_get_node_by_name (
+ vm, (u8 *) (ipv4_set ? "ip4-input" : "ip6-input"));
+ decap_next_index = get_decap_next_for_node (node->index, ipv4_set);
+ }
+
+ if (encap_fib_index == ~0)
+ return clib_error_return (0, "nonexistent encap-vrf-id %d", table_id);
+
+ if (src_set == 0)
+ return clib_error_return (0, "tunnel src address not specified");
+
+ if (dst_set == 0)
+ return clib_error_return (0, "tunnel dst address not specified");
+
+ if (grp_set && !ip46_address_is_multicast (&dst))
+ return clib_error_return (0, "tunnel group address not multicast");
+
+ if (grp_set == 0 && ip46_address_is_multicast (&dst))
+ return clib_error_return (0, "dst address must be unicast");
+
+ if (grp_set && mcast_sw_if_index == ~0)
+ return clib_error_return (0, "tunnel nonexistent multicast device");
+
+ if (ipv4_set && ipv6_set)
+ return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
+
+ if (ip46_address_cmp (&src, &dst) == 0)
+ return clib_error_return (0, "src and dst addresses are identical");
+
+ if (decap_next_index == ~0)
+ return clib_error_return (0, "next node not found");
+
+ if (vni == 0)
+ return clib_error_return (0, "vni not specified");
+
+ if (vni >> 24)
+ return clib_error_return (0, "vni %d out of range", vni);
+
+ vnet_vxlan_add_del_tunnel_args_t a = { .is_add = is_add,
+ .is_ip6 = ipv6_set,
+ .is_l3 = is_l3,
+ .instance = instance,
+#define _(x) .x = x,
+ foreach_copy_field
+#undef _
+ };
+
+ u32 tunnel_sw_if_index;
+ int rv = vnet_vxlan_add_del_tunnel (&a, &tunnel_sw_if_index);
+
+ switch (rv)
+ {
+ case 0:
+ if (is_add)
+ vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name,
+ vnet_get_main (), tunnel_sw_if_index);
+ break;
+
+ case VNET_API_ERROR_TUNNEL_EXIST:
+ return clib_error_return (0, "tunnel already exists...");
+
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ return clib_error_return (0, "tunnel does not exist...");
+
+ case VNET_API_ERROR_INSTANCE_IN_USE:
+ return clib_error_return (0, "Instance is in use");
+
+ default:
+ return clib_error_return
+ (0, "vnet_vxlan_add_del_tunnel returned %d", rv);
+ }
+
+ return 0;
+}
+
+/*?
+ * Add or delete a VXLAN Tunnel.
+ *
+ * VXLAN provides the features needed to allow L2 bridge domains (BDs)
+ * to span multiple servers. This is done by building an L2 overlay on
+ * top of an L3 network underlay using VXLAN tunnels.
+ *
+ * This makes it possible for servers to be co-located in the same data
+ * center or be separated geographically as long as they are reachable
+ * through the underlay L3 network.
+ *
+ * You can refer to this kind of L2 overlay bridge domain as a VXLAN
+ * (Virtual eXtensible VLAN) segment.
+ *
+ * @cliexpar
+ * Example of how to create a VXLAN Tunnel:
+ * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 encap-vrf-id
+ 7}
+ * Example of how to create a VXLAN Tunnel with a known name, vxlan_tunnel42:
+ * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 instance 42}
+ * Example of how to create a multicast VXLAN Tunnel with a known name,
+ vxlan_tunnel23:
+ * @cliexcmd{create vxlan tunnel src 10.0.3.1 group 239.1.1.1
+ GigabitEthernet0/8/0 instance 23}
+ * Example of how to create a VXLAN Tunnel with custom udp-ports:
+ * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 src_port
+ 59000 dst_port 59001}
+ * Example of how to delete a VXLAN Tunnel:
+ * @cliexcmd{create vxlan tunnel src 10.0.3.1 dst 10.0.3.3 vni 13 del}
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (create_vxlan_tunnel_command, static) = {
+ .path = "create vxlan tunnel",
+ .short_help =
+ "create vxlan tunnel src <local-vtep-addr>"
+ " {dst <remote-vtep-addr>|group <mcast-vtep-addr> <intf-name>} vni <nn>"
+ " [instance <id>]"
+ " [encap-vrf-id <nn>] [decap-next [l2|node <name>]] [del] [l3]"
+ " [src_port <local-vtep-udp-port>] [dst_port <remote-vtep-udp-port>]",
+ .function = vxlan_add_del_tunnel_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+show_vxlan_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+ vxlan_tunnel_t *t;
+ int raw = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "raw"))
+ raw = 1;
+ else
+ return clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, input);
+ }
+
+ if (pool_elts (vxm->tunnels) == 0)
+ vlib_cli_output (vm, "No vxlan tunnels configured...");
+
+/* *INDENT-OFF* */
+ pool_foreach (t, vxm->tunnels)
+ {
+ vlib_cli_output (vm, "%U", format_vxlan_tunnel, t);
+ }
+/* *INDENT-ON* */
+
+ if (raw)
+ {
+ vlib_cli_output (vm, "Raw IPv4 Hash Table:\n%U\n",
+ format_bihash_16_8, &vxm->vxlan4_tunnel_by_key,
+ 1 /* verbose */ );
+ vlib_cli_output (vm, "Raw IPv6 Hash Table:\n%U\n",
+ format_bihash_24_8, &vxm->vxlan6_tunnel_by_key,
+ 1 /* verbose */ );
+ }
+
+ return 0;
+}
+
+/*?
+ * Display all the VXLAN Tunnel entries.
+ *
+ * @cliexpar
+ * Example of how to display the VXLAN Tunnel entries:
+ * @cliexstart{show vxlan tunnel}
+ * [0] src 10.0.3.1 dst 10.0.3.3 src_port 4789 dst_port 4789 vni 13
+ encap_fib_index 0 sw_if_index 5 decap_next l2
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_vxlan_tunnel_command, static) = {
+ .path = "show vxlan tunnel",
+ .short_help = "show vxlan tunnel [raw]",
+ .function = show_vxlan_tunnel_command_fn,
+};
+/* *INDENT-ON* */
+
+
+void
+vnet_int_vxlan_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+
+ if (pool_is_free_index (vxm->vnet_main->interface_main.sw_interfaces,
+ sw_if_index))
+ return;
+
+ is_enable = ! !is_enable;
+
+ if (is_ip6)
+ {
+ if (clib_bitmap_get (vxm->bm_ip6_bypass_enabled_by_sw_if, sw_if_index)
+ != is_enable)
+ {
+ vnet_feature_enable_disable ("ip6-unicast", "ip6-vxlan-bypass",
+ sw_if_index, is_enable, 0, 0);
+ vxm->bm_ip6_bypass_enabled_by_sw_if =
+ clib_bitmap_set (vxm->bm_ip6_bypass_enabled_by_sw_if,
+ sw_if_index, is_enable);
+ }
+ }
+ else
+ {
+ if (clib_bitmap_get (vxm->bm_ip4_bypass_enabled_by_sw_if, sw_if_index)
+ != is_enable)
+ {
+ vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass",
+ sw_if_index, is_enable, 0, 0);
+ vxm->bm_ip4_bypass_enabled_by_sw_if =
+ clib_bitmap_set (vxm->bm_ip4_bypass_enabled_by_sw_if,
+ sw_if_index, is_enable);
+ }
+ }
+}
+
+
+static clib_error_t *
+set_ip_vxlan_bypass (u32 is_ip6,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
+ u32 sw_if_index, is_enable;
+
+ sw_if_index = ~0;
+ is_enable = 1;
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat_user
+ (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "del"))
+ is_enable = 0;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (~0 == sw_if_index)
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+
+ vnet_int_vxlan_bypass_mode (sw_if_index, is_ip6, is_enable);
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+static clib_error_t *
+set_ip4_vxlan_bypass (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ return set_ip_vxlan_bypass (0, input, cmd);
+}
+
+/*?
+ * This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
+ * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
+ * for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
+ * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
+ * cause extra overhead to for non-vxlan packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0]
+ * vxlan4-input [1]
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip4-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0] ip4-input
+ * vxlan4-input [1] ip4-input-no-checksum
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to display the feature enabled on an interface:
+ * @cliexstart{show ip interface features GigabitEthernet2/0/0}
+ * IP feature paths configured on GigabitEthernet2/0/0...
+ * ...
+ * ipv4 unicast:
+ * ip4-vxlan-bypass
+ * ip4-lookup
+ * ...
+ * @cliexend
+ *
+ * Example of how to disable ip4-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
+ .path = "set interface ip vxlan-bypass",
+ .function = set_ip4_vxlan_bypass,
+ .short_help = "set interface ip vxlan-bypass <interface> [del]",
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+set_ip6_vxlan_bypass (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ return set_ip_vxlan_bypass (1, input, cmd);
+}
+
+/*?
+ * This command adds the 'ip6-vxlan-bypass' graph node for a given interface.
+ * By adding the IPv6 vxlan-bypass graph node to an interface, the node checks
+ * for and validate input vxlan packet and bypass ip6-lookup, ip6-local,
+ * ip6-udp-lookup nodes to speedup vxlan packet forwarding. This node will
+ * cause extra overhead to for non-vxlan packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip6-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip6-vxlan-bypass}
+ * Name Next Previous
+ * ip6-vxlan-bypass error-drop [0]
+ * vxlan6-input [1]
+ * ip6-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip6-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip6-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip6-vxlan-bypass}
+ * Name Next Previous
+ * ip6-vxlan-bypass error-drop [0] ip6-input
+ * vxlan6-input [1] ip4-input-no-checksum
+ * ip6-lookup [2]
+ * @cliexend
+ *
+ * Example of how to display the feature enabled on an interface:
+ * @cliexstart{show ip interface features GigabitEthernet2/0/0}
+ * IP feature paths configured on GigabitEthernet2/0/0...
+ * ...
+ * ipv6 unicast:
+ * ip6-vxlan-bypass
+ * ip6-lookup
+ * ...
+ * @cliexend
+ *
+ * Example of how to disable ip6-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip6 vxlan-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip6_vxlan_bypass_command, static) = {
+ .path = "set interface ip6 vxlan-bypass",
+ .function = set_ip6_vxlan_bypass,
+ .short_help = "set interface ip6 vxlan-bypass <interface> [del]",
+};
+/* *INDENT-ON* */
+
+int
+vnet_vxlan_add_del_rx_flow (u32 hw_if_index, u32 t_index, int is_add)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+ vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, t_index);
+ vnet_main_t *vnm = vnet_get_main ();
+ if (is_add)
+ {
+ if (t->flow_index == ~0)
+ {
+ vxlan_main_t *vxm = &vxlan_main;
+ vnet_flow_t flow = {
+ .actions =
+ VNET_FLOW_ACTION_REDIRECT_TO_NODE | VNET_FLOW_ACTION_MARK |
+ VNET_FLOW_ACTION_BUFFER_ADVANCE,
+ .mark_flow_id = t->dev_instance + vxm->flow_id_start,
+ .redirect_node_index = vxlan4_flow_input_node.index,
+ .buffer_advance = sizeof (ethernet_header_t),
+ .type = VNET_FLOW_TYPE_IP4_VXLAN,
+ .ip4_vxlan = {
+ .protocol.prot = IP_PROTOCOL_UDP,
+ .src_addr.addr = t->dst.ip4,
+ .dst_addr.addr = t->src.ip4,
+ .src_addr.mask.as_u32 = ~0,
+ .dst_addr.mask.as_u32 = ~0,
+ .dst_port.port = t->src_port,
+ .dst_port.mask = 0xFF,
+ .vni = t->vni,
+ }
+ ,
+ };
+ vnet_flow_add (vnm, &flow, &t->flow_index);
+ }
+ return vnet_flow_enable (vnm, t->flow_index, hw_if_index);
+ }
+ /* flow index is removed when the tunnel is deleted */
+ return vnet_flow_disable (vnm, t->flow_index, hw_if_index);
+}
+
+u32
+vnet_vxlan_get_tunnel_index (u32 sw_if_index)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+
+ if (sw_if_index >= vec_len (vxm->tunnel_index_by_sw_if_index))
+ return ~0;
+ return vxm->tunnel_index_by_sw_if_index[sw_if_index];
+}
+
+static clib_error_t *
+vxlan_offload_command_fn (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ vnet_main_t *vnm = vnet_get_main ();
+ u32 rx_sw_if_index = ~0;
+ u32 hw_if_index = ~0;
+ int is_add = 1;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "hw %U", unformat_vnet_hw_interface, vnm,
+ &hw_if_index))
+ continue;
+ if (unformat (line_input, "rx %U", unformat_vnet_sw_interface, vnm,
+ &rx_sw_if_index))
+ continue;
+ if (unformat (line_input, "del"))
+ {
+ is_add = 0;
+ continue;
+ }
+ return clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ }
+
+ if (rx_sw_if_index == ~0)
+ return clib_error_return (0, "missing rx interface");
+ if (hw_if_index == ~0)
+ return clib_error_return (0, "missing hw interface");
+
+ u32 t_index = vnet_vxlan_get_tunnel_index (rx_sw_if_index);;
+ if (t_index == ~0)
+ return clib_error_return (0, "%U is not a vxlan tunnel",
+ format_vnet_sw_if_index_name, vnm,
+ rx_sw_if_index);
+
+ vxlan_main_t *vxm = &vxlan_main;
+ vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, t_index);
+
+ if (!ip46_address_is_ip4 (&t->dst))
+ return clib_error_return (0, "currently only IPV4 tunnels are supported");
+
+ vnet_hw_interface_t *hw_if = vnet_get_hw_interface (vnm, hw_if_index);
+ ip4_main_t *im = &ip4_main;
+ u32 rx_fib_index =
+ vec_elt (im->fib_index_by_sw_if_index, hw_if->sw_if_index);
+
+ if (t->encap_fib_index != rx_fib_index)
+ return clib_error_return (0, "interface/tunnel fib mismatch");
+
+ if (vnet_vxlan_add_del_rx_flow (hw_if_index, t_index, is_add))
+ return clib_error_return (0, "error %s flow",
+ is_add ? "enabling" : "disabling");
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (vxlan_offload_command, static) = {
+ .path = "set flow-offload vxlan",
+ .short_help =
+ "set flow-offload vxlan hw <interface-name> rx <tunnel-name> [del]",
+ .function = vxlan_offload_command_fn,
+};
+/* *INDENT-ON* */
+
+#define VXLAN_HASH_NUM_BUCKETS (2 * 1024)
+#define VXLAN_HASH_MEMORY_SIZE (1 << 20)
+
+clib_error_t *
+vxlan_init (vlib_main_t * vm)
+{
+ vxlan_main_t *vxm = &vxlan_main;
+
+ vxm->vnet_main = vnet_get_main ();
+ vxm->vlib_main = vm;
+
+ vnet_flow_get_range (vxm->vnet_main, "vxlan", 1024 * 1024,
+ &vxm->flow_id_start);
+
+ vxm->bm_ip4_bypass_enabled_by_sw_if = 0;
+ vxm->bm_ip6_bypass_enabled_by_sw_if = 0;
+
+ /* initialize the ip6 hash */
+ clib_bihash_init_16_8 (&vxm->vxlan4_tunnel_by_key, "vxlan4",
+ VXLAN_HASH_NUM_BUCKETS, VXLAN_HASH_MEMORY_SIZE);
+ clib_bihash_init_24_8 (&vxm->vxlan6_tunnel_by_key, "vxlan6",
+ VXLAN_HASH_NUM_BUCKETS, VXLAN_HASH_MEMORY_SIZE);
+ vxm->vtep_table = vtep_table_create ();
+ vxm->mcast_shared = hash_create_mem (0,
+ sizeof (ip46_address_t),
+ sizeof (mcast_shared_t));
+
+ fib_node_register_type (FIB_NODE_TYPE_VXLAN_TUNNEL, &vxlan_vft);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (vxlan_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/vxlan/vxlan.h b/src/plugins/vxlan/vxlan.h
new file mode 100644
index 00000000000..72d82e79cf5
--- /dev/null
+++ b/src/plugins/vxlan/vxlan.h
@@ -0,0 +1,242 @@
+/*
+ * 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_vnet_vxlan_h
+#define included_vnet_vxlan_h
+
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/bihash_16_8.h>
+#include <vppinfra/bihash_24_8.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/vtep.h>
+#include <vnet/l2/l2_input.h>
+#include <vnet/l2/l2_output.h>
+#include <vnet/l2/l2_bd.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vxlan/vxlan_packet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/udp/udp_packet.h>
+#include <vnet/dpo/dpo.h>
+#include <vnet/adj/adj_types.h>
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
+ ip4_header_t ip4; /* 20 bytes */
+ udp_header_t udp; /* 8 bytes */
+ vxlan_header_t vxlan; /* 8 bytes */
+}) ip4_vxlan_header_t;
+
+typedef CLIB_PACKED (struct {
+ ip6_header_t ip6; /* 40 bytes */
+ udp_header_t udp; /* 8 bytes */
+ vxlan_header_t vxlan; /* 8 bytes */
+}) ip6_vxlan_header_t;
+/* *INDENT-ON* */
+
+/*
+* Key fields: remote ip, vni on incoming VXLAN packet
+* all fields in NET byte order
+*/
+typedef clib_bihash_kv_16_8_t vxlan4_tunnel_key_t;
+
+/*
+* Key fields: remote ip, vni and fib index on incoming VXLAN packet
+* ip, vni fields in NET byte order
+* fib index field in host byte order
+*/
+typedef clib_bihash_kv_24_8_t vxlan6_tunnel_key_t;
+
+typedef union
+{
+ struct
+ {
+ u32 sw_if_index; /* unicast - input interface / mcast - stats interface */
+ union
+ {
+ struct /* unicast action */
+ {
+ u16 next_index;
+ u8 error;
+ };
+ ip4_address_t local_ip; /* used as dst ip for mcast pkts to assign them to unicast tunnel */
+ };
+ };
+ u64 as_u64;
+} vxlan_decap_info_t;
+
+typedef struct
+{
+ /* Required for pool_get_aligned */
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+
+ /* FIB DPO for IP forwarding of VXLAN encap packet */
+ dpo_id_t next_dpo;
+
+ /* vxlan VNI in HOST byte order */
+ u32 vni;
+
+ /* tunnel src and dst addresses */
+ ip46_address_t src;
+ ip46_address_t dst;
+
+ /* udp-ports */
+ u16 src_port;
+ u16 dst_port;
+
+ /* mcast packet output intfc index (used only if dst is mcast) */
+ u32 mcast_sw_if_index;
+
+ /* decap next index */
+ u16 decap_next_index;
+
+ /* The FIB index for src/dst addresses */
+ u32 encap_fib_index;
+
+ /* vnet intfc index */
+ u32 sw_if_index;
+ u32 hw_if_index;
+
+ /**
+ * Linkage into the FIB object graph
+ */
+ fib_node_t node;
+
+ /*
+ * The FIB entry for (depending on VXLAN tunnel is unicast or mcast)
+ * sending unicast VXLAN encap packets or receiving mcast VXLAN packets
+ */
+ fib_node_index_t fib_entry_index;
+ adj_index_t mcast_adj_index;
+
+ /**
+ * The tunnel is a child of the FIB entry for its destination. This is
+ * so it receives updates when the forwarding information for that entry
+ * changes.
+ * The tunnels sibling index on the FIB entry's dependency list.
+ */
+ u32 sibling_index;
+
+ u32 flow_index; /* infra flow index */
+ u32 dev_instance; /* Real device instance in tunnel vector */
+ u32 user_instance; /* Instance name being shown to user */
+
+ VNET_DECLARE_REWRITE;
+} vxlan_tunnel_t;
+
+#define foreach_vxlan_input_next \
+_(DROP, "error-drop") \
+_(L2_INPUT, "l2-input")
+
+typedef enum
+{
+#define _(s,n) VXLAN_INPUT_NEXT_##s,
+ foreach_vxlan_input_next
+#undef _
+ VXLAN_INPUT_N_NEXT,
+} vxlan_input_next_t;
+
+typedef enum
+{
+#define vxlan_error(n,s) VXLAN_ERROR_##n,
+#include <vxlan/vxlan_error.def>
+#undef vxlan_error
+ VXLAN_N_ERROR,
+} vxlan_input_error_t;
+
+typedef struct
+{
+ /* vector of encap tunnel instances */
+ vxlan_tunnel_t *tunnels;
+
+ /* lookup tunnel by key */
+ clib_bihash_16_8_t
+ vxlan4_tunnel_by_key; /* keyed on ipv4.dst + src_port + fib + vni */
+ clib_bihash_24_8_t
+ vxlan6_tunnel_by_key; /* keyed on ipv6.dst + src_port + fib + vni */
+
+ /* local VTEP IPs ref count used by vxlan-bypass node to check if
+ received VXLAN packet DIP matches any local VTEP address */
+ vtep_table_t vtep_table;
+
+ /* mcast shared info */
+ uword *mcast_shared; /* keyed on mcast ip46 addr */
+
+ /* Mapping from sw_if_index to tunnel index */
+ u32 *tunnel_index_by_sw_if_index;
+
+ /* graph node state */
+ uword *bm_ip4_bypass_enabled_by_sw_if;
+ uword *bm_ip6_bypass_enabled_by_sw_if;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+
+ /* Record used instances */
+ uword *instance_used;
+ u32 flow_id_start;
+
+ /* cache for last 8 vxlan tunnel */
+ vtep4_cache_t vtep4_u512;
+
+} vxlan_main_t;
+
+extern vxlan_main_t vxlan_main;
+
+extern vlib_node_registration_t vxlan4_input_node;
+extern vlib_node_registration_t vxlan6_input_node;
+extern vlib_node_registration_t vxlan4_encap_node;
+extern vlib_node_registration_t vxlan6_encap_node;
+extern vlib_node_registration_t vxlan4_flow_input_node;
+
+u8 *format_vxlan_encap_trace (u8 * s, va_list * args);
+
+typedef struct
+{
+ u8 is_add;
+
+ /* we normally use is_ip4, but since this adds to the
+ * structure, this seems less of a breaking change */
+ u8 is_ip6;
+ u8 is_l3;
+ u32 instance;
+ ip46_address_t src, dst;
+ u32 mcast_sw_if_index;
+ u32 encap_fib_index;
+ u32 decap_next_index;
+ u32 vni;
+ u16 src_port;
+ u16 dst_port;
+} vnet_vxlan_add_del_tunnel_args_t;
+
+int vnet_vxlan_add_del_tunnel
+ (vnet_vxlan_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
+
+void vnet_int_vxlan_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable);
+
+int vnet_vxlan_add_del_rx_flow (u32 hw_if_index, u32 t_imdex, int is_add);
+
+u32 vnet_vxlan_get_tunnel_index (u32 sw_if_index);
+#endif /* included_vnet_vxlan_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/vxlan/vxlan_api.c b/src/plugins/vxlan/vxlan_api.c
new file mode 100644
index 00000000000..8fd0928cc63
--- /dev/null
+++ b/src/plugins/vxlan/vxlan_api.c
@@ -0,0 +1,376 @@
+/*
+ *------------------------------------------------------------------
+ * vxlan_api.c - vxlan api
+ *
+ * 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.
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+
+#include <vnet/interface.h>
+#include <vnet/api_errno.h>
+#include <vnet/feature/feature.h>
+#include <vxlan/vxlan.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/ip/ip_types_api.h>
+#include <vnet/udp/udp_local.h>
+#include <vnet/format_fns.h>
+#include <vxlan/vxlan.api_enum.h>
+#include <vxlan/vxlan.api_types.h>
+
+static u16 msg_id_base;
+
+#define REPLY_MSG_ID_BASE msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+static void
+vl_api_vxlan_offload_rx_t_handler (vl_api_vxlan_offload_rx_t * mp)
+{
+ vl_api_vxlan_offload_rx_reply_t *rmp;
+ int rv = 0;
+ u32 hw_if_index = ntohl (mp->hw_if_index);
+ u32 sw_if_index = ntohl (mp->sw_if_index);
+
+ if (!vnet_hw_interface_is_valid (vnet_get_main (), hw_if_index))
+ {
+ rv = VNET_API_ERROR_NO_SUCH_ENTRY;
+ goto err;
+ }
+ VALIDATE_SW_IF_INDEX (mp);
+
+ u32 t_index = vnet_vxlan_get_tunnel_index (sw_if_index);
+ if (t_index == ~0)
+ {
+ rv = VNET_API_ERROR_INVALID_SW_IF_INDEX_2;
+ goto err;
+ }
+
+ vxlan_main_t *vxm = &vxlan_main;
+ vxlan_tunnel_t *t = pool_elt_at_index (vxm->tunnels, t_index);
+ if (!ip46_address_is_ip4 (&t->dst))
+ {
+ rv = VNET_API_ERROR_INVALID_ADDRESS_FAMILY;
+ goto err;
+ }
+
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_hw_interface_t *hw_if = vnet_get_hw_interface (vnm, hw_if_index);
+ ip4_main_t *im = &ip4_main;
+ u32 rx_fib_index =
+ vec_elt (im->fib_index_by_sw_if_index, hw_if->sw_if_index);
+
+ if (t->encap_fib_index != rx_fib_index)
+ {
+ rv = VNET_API_ERROR_NO_SUCH_FIB;
+ goto err;
+ }
+
+ if (vnet_vxlan_add_del_rx_flow (hw_if_index, t_index, mp->enable))
+ {
+ rv = VNET_API_ERROR_UNSPECIFIED;
+ goto err;
+ }
+ BAD_SW_IF_INDEX_LABEL;
+err:
+
+ REPLY_MACRO (VL_API_VXLAN_OFFLOAD_RX_REPLY);
+}
+
+static void
+ vl_api_sw_interface_set_vxlan_bypass_t_handler
+ (vl_api_sw_interface_set_vxlan_bypass_t * mp)
+{
+ vl_api_sw_interface_set_vxlan_bypass_reply_t *rmp;
+ int rv = 0;
+ u32 sw_if_index = ntohl (mp->sw_if_index);
+
+ VALIDATE_SW_IF_INDEX (mp);
+
+ vnet_int_vxlan_bypass_mode (sw_if_index, mp->is_ipv6, mp->enable);
+ BAD_SW_IF_INDEX_LABEL;
+
+ REPLY_MACRO (VL_API_SW_INTERFACE_SET_VXLAN_BYPASS_REPLY);
+}
+
+static int
+vxlan_add_del_tunnel_clean_input (vnet_vxlan_add_del_tunnel_args_t *a,
+ u32 encap_vrf_id)
+{
+ a->is_ip6 = !ip46_address_is_ip4 (&a->src);
+
+ a->encap_fib_index = fib_table_find (fib_ip_proto (a->is_ip6), encap_vrf_id);
+ if (a->encap_fib_index == ~0)
+ {
+ return VNET_API_ERROR_NO_SUCH_FIB;
+ }
+
+ if (ip46_address_is_ip4 (&a->src) != ip46_address_is_ip4 (&a->dst))
+ {
+ return VNET_API_ERROR_INVALID_VALUE;
+ }
+
+ /* Check src & dst are different */
+ if (ip46_address_cmp (&a->dst, &a->src) == 0)
+ {
+ return VNET_API_ERROR_SAME_SRC_DST;
+ }
+ if (ip46_address_is_multicast (&a->dst) &&
+ !vnet_sw_if_index_is_api_valid (a->mcast_sw_if_index))
+ {
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+ }
+ return 0;
+}
+
+static void
+vl_api_vxlan_add_del_tunnel_t_handler (vl_api_vxlan_add_del_tunnel_t *mp)
+{
+ vl_api_vxlan_add_del_tunnel_reply_t *rmp;
+ u32 sw_if_index = ~0;
+ int rv = 0;
+
+ vnet_vxlan_add_del_tunnel_args_t a = {
+ .is_add = mp->is_add,
+ .instance = ntohl (mp->instance),
+ .mcast_sw_if_index = ntohl (mp->mcast_sw_if_index),
+ .decap_next_index = ntohl (mp->decap_next_index),
+ .vni = ntohl (mp->vni),
+ };
+ ip_address_decode (&mp->src_address, &a.src);
+ ip_address_decode (&mp->dst_address, &a.dst);
+
+ rv = vxlan_add_del_tunnel_clean_input (&a, ntohl (mp->encap_vrf_id));
+ if (rv)
+ goto out;
+ a.dst_port = a.is_ip6 ? UDP_DST_PORT_vxlan6 : UDP_DST_PORT_vxlan,
+ a.src_port = a.is_ip6 ? UDP_DST_PORT_vxlan6 : UDP_DST_PORT_vxlan,
+ rv = vnet_vxlan_add_del_tunnel (&a, &sw_if_index);
+
+out:
+ REPLY_MACRO2(VL_API_VXLAN_ADD_DEL_TUNNEL_REPLY,
+ ({
+ rmp->sw_if_index = ntohl (sw_if_index);
+ }));
+}
+
+static void
+vl_api_vxlan_add_del_tunnel_v2_t_handler (vl_api_vxlan_add_del_tunnel_v2_t *mp)
+{
+ vl_api_vxlan_add_del_tunnel_v2_reply_t *rmp;
+ u32 sw_if_index = ~0;
+ int rv = 0;
+
+ vnet_vxlan_add_del_tunnel_args_t a = {
+ .is_add = mp->is_add,
+ .instance = ntohl (mp->instance),
+ .mcast_sw_if_index = ntohl (mp->mcast_sw_if_index),
+ .decap_next_index = ntohl (mp->decap_next_index),
+ .vni = ntohl (mp->vni),
+ .dst_port = ntohs (mp->dst_port),
+ .src_port = ntohs (mp->src_port),
+ };
+
+ ip_address_decode (&mp->src_address, &a.src);
+ ip_address_decode (&mp->dst_address, &a.dst);
+
+ rv = vxlan_add_del_tunnel_clean_input (&a, ntohl (mp->encap_vrf_id));
+ if (rv)
+ goto out;
+ rv = vnet_vxlan_add_del_tunnel (&a, &sw_if_index);
+out:
+ REPLY_MACRO2 (VL_API_VXLAN_ADD_DEL_TUNNEL_V2_REPLY,
+ ({ rmp->sw_if_index = ntohl (sw_if_index); }));
+}
+
+static void
+vl_api_vxlan_add_del_tunnel_v3_t_handler (vl_api_vxlan_add_del_tunnel_v3_t *mp)
+{
+ vl_api_vxlan_add_del_tunnel_v3_reply_t *rmp;
+ u32 sw_if_index = ~0;
+ int rv = 0;
+
+ vnet_vxlan_add_del_tunnel_args_t a = {
+ .is_add = mp->is_add,
+ .instance = ntohl (mp->instance),
+ .mcast_sw_if_index = ntohl (mp->mcast_sw_if_index),
+ .decap_next_index = ntohl (mp->decap_next_index),
+ .vni = ntohl (mp->vni),
+ .dst_port = ntohs (mp->dst_port),
+ .src_port = ntohs (mp->src_port),
+ .is_l3 = mp->is_l3,
+ };
+
+ ip_address_decode (&mp->src_address, &a.src);
+ ip_address_decode (&mp->dst_address, &a.dst);
+
+ rv = vxlan_add_del_tunnel_clean_input (&a, ntohl (mp->encap_vrf_id));
+ if (rv)
+ goto out;
+ rv = vnet_vxlan_add_del_tunnel (&a, &sw_if_index);
+out:
+ REPLY_MACRO2 (VL_API_VXLAN_ADD_DEL_TUNNEL_V3_REPLY,
+ ({ rmp->sw_if_index = ntohl (sw_if_index); }));
+}
+
+static void send_vxlan_tunnel_details
+ (vxlan_tunnel_t * t, vl_api_registration_t * reg, u32 context)
+{
+ vl_api_vxlan_tunnel_details_t *rmp;
+ ip4_main_t *im4 = &ip4_main;
+ ip6_main_t *im6 = &ip6_main;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ clib_memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (REPLY_MSG_ID_BASE + VL_API_VXLAN_TUNNEL_DETAILS);
+
+ ip_address_encode (&t->src, IP46_TYPE_ANY, &rmp->src_address);
+ ip_address_encode (&t->dst, IP46_TYPE_ANY, &rmp->dst_address);
+
+ if (ip46_address_is_ip4 (&t->dst))
+ rmp->encap_vrf_id = htonl (im4->fibs[t->encap_fib_index].ft_table_id);
+ else
+ rmp->encap_vrf_id = htonl (im6->fibs[t->encap_fib_index].ft_table_id);
+
+ rmp->instance = htonl (t->user_instance);
+ rmp->mcast_sw_if_index = htonl (t->mcast_sw_if_index);
+ rmp->vni = htonl (t->vni);
+ rmp->decap_next_index = htonl (t->decap_next_index);
+ rmp->sw_if_index = htonl (t->sw_if_index);
+ rmp->context = context;
+
+ vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void vl_api_vxlan_tunnel_dump_t_handler
+ (vl_api_vxlan_tunnel_dump_t * mp)
+{
+ vl_api_registration_t *reg;
+ vxlan_main_t *vxm = &vxlan_main;
+ vxlan_tunnel_t *t;
+ u32 sw_if_index;
+
+ reg = vl_api_client_index_to_registration (mp->client_index);
+ if (!reg)
+ return;
+
+ sw_if_index = ntohl (mp->sw_if_index);
+
+ if (~0 == sw_if_index)
+ {
+ pool_foreach (t, vxm->tunnels)
+ send_vxlan_tunnel_details(t, reg, mp->context);
+ }
+ else
+ {
+ if ((sw_if_index >= vec_len (vxm->tunnel_index_by_sw_if_index)) ||
+ (~0 == vxm->tunnel_index_by_sw_if_index[sw_if_index]))
+ {
+ return;
+ }
+ t = &vxm->tunnels[vxm->tunnel_index_by_sw_if_index[sw_if_index]];
+ send_vxlan_tunnel_details (t, reg, mp->context);
+ }
+}
+
+static void
+send_vxlan_tunnel_v2_details (vxlan_tunnel_t *t, vl_api_registration_t *reg,
+ u32 context)
+{
+ vl_api_vxlan_tunnel_v2_details_t *rmp;
+ ip4_main_t *im4 = &ip4_main;
+ ip6_main_t *im6 = &ip6_main;
+
+ rmp = vl_msg_api_alloc (sizeof (*rmp));
+ clib_memset (rmp, 0, sizeof (*rmp));
+ rmp->_vl_msg_id = ntohs (REPLY_MSG_ID_BASE + VL_API_VXLAN_TUNNEL_V2_DETAILS);
+
+ ip_address_encode (&t->src, IP46_TYPE_ANY, &rmp->src_address);
+ ip_address_encode (&t->dst, IP46_TYPE_ANY, &rmp->dst_address);
+ rmp->src_port = htons (t->src_port);
+ rmp->dst_port = htons (t->dst_port);
+
+ if (ip46_address_is_ip4 (&t->dst))
+ rmp->encap_vrf_id = htonl (im4->fibs[t->encap_fib_index].ft_table_id);
+ else
+ rmp->encap_vrf_id = htonl (im6->fibs[t->encap_fib_index].ft_table_id);
+
+ rmp->instance = htonl (t->user_instance);
+ rmp->mcast_sw_if_index = htonl (t->mcast_sw_if_index);
+ rmp->vni = htonl (t->vni);
+ rmp->decap_next_index = htonl (t->decap_next_index);
+ rmp->sw_if_index = htonl (t->sw_if_index);
+ rmp->context = context;
+
+ vl_api_send_msg (reg, (u8 *) rmp);
+}
+
+static void
+vl_api_vxlan_tunnel_v2_dump_t_handler (vl_api_vxlan_tunnel_v2_dump_t *mp)
+{
+ vl_api_registration_t *reg;
+ vxlan_main_t *vxm = &vxlan_main;
+ vxlan_tunnel_t *t;
+ u32 sw_if_index;
+
+ reg = vl_api_client_index_to_registration (mp->client_index);
+ if (!reg)
+ return;
+
+ sw_if_index = ntohl (mp->sw_if_index);
+
+ if (~0 == sw_if_index)
+ {
+ pool_foreach (t, vxm->tunnels)
+ send_vxlan_tunnel_v2_details (t, reg, mp->context);
+ }
+ else
+ {
+ if ((sw_if_index >= vec_len (vxm->tunnel_index_by_sw_if_index)) ||
+ (~0 == vxm->tunnel_index_by_sw_if_index[sw_if_index]))
+ {
+ return;
+ }
+ t = &vxm->tunnels[vxm->tunnel_index_by_sw_if_index[sw_if_index]];
+ send_vxlan_tunnel_v2_details (t, reg, mp->context);
+ }
+}
+
+#include <vxlan/vxlan.api.c>
+static clib_error_t *
+vxlan_api_hookup (vlib_main_t * vm)
+{
+ api_main_t *am = vlibapi_get_main ();
+
+ vl_api_increase_msg_trace_size (am, VL_API_VXLAN_ADD_DEL_TUNNEL,
+ 16 * sizeof (u32));
+
+ /*
+ * Set up the (msg_name, crc, message-id) table
+ */
+ msg_id_base = setup_message_id_table ();
+
+ return 0;
+}
+
+VLIB_API_INIT_FUNCTION (vxlan_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/vxlan/vxlan_error.def b/src/plugins/vxlan/vxlan_error.def
new file mode 100644
index 00000000000..17f905950f5
--- /dev/null
+++ b/src/plugins/vxlan/vxlan_error.def
@@ -0,0 +1,17 @@
+/*
+ * 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.
+ */
+vxlan_error (DECAPSULATED, "good packets decapsulated")
+vxlan_error (NO_SUCH_TUNNEL, "no such tunnel packets")
+vxlan_error (BAD_FLAGS, "packets with bad flags field in vxlan header")
diff --git a/src/plugins/vxlan/vxlan_packet.h b/src/plugins/vxlan/vxlan_packet.h
new file mode 100644
index 00000000000..d1d1ed813e5
--- /dev/null
+++ b/src/plugins/vxlan/vxlan_packet.h
@@ -0,0 +1,80 @@
+/*
+ * 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_vxlan_packet_h__
+#define __included_vxlan_packet_h__ 1
+
+/*
+ * From RFC-7348
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |R|R|R|R|I|R|R|R| Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | VXLAN Network Identifier (VNI) | Reserved |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * VXLAN Header: This is an 8-byte field that has:
+ *
+ * - Flags (8 bits): where the I flag MUST be set to 1 for a valid
+ * VXLAN Network ID (VNI). The other 7 bits (designated "R") are
+ * reserved fields and MUST be set to zero on transmission and
+ * ignored on receipt.
+ *
+ * - VXLAN Segment ID/VXLAN Network Identifier (VNI): this is a
+ * 24-bit value used to designate the individual VXLAN overlay
+ * network on which the communicating VMs are situated. VMs in
+ * different VXLAN overlay networks cannot communicate with each
+ * other.
+ *
+ * - Reserved fields (24 bits and 8 bits): MUST be set to zero on
+ * transmission and ignored on receipt.
+ *
+ */
+
+typedef struct
+{
+ u8 flags;
+ u8 res1;
+ u8 res2;
+ u8 res3;
+ u32 vni_reserved;
+} vxlan_header_t;
+
+#define VXLAN_FLAGS_I 0x08
+
+static inline u32
+vnet_get_vni (vxlan_header_t * h)
+{
+ u32 vni_reserved_host_byte_order;
+
+ vni_reserved_host_byte_order = clib_net_to_host_u32 (h->vni_reserved);
+ return vni_reserved_host_byte_order >> 8;
+}
+
+static inline void
+vnet_set_vni_and_flags (vxlan_header_t * h, u32 vni)
+{
+ h->vni_reserved = clib_host_to_net_u32 (vni << 8);
+ *(u32 *) h = 0;
+ h->flags = VXLAN_FLAGS_I;
+}
+
+#endif /* __included_vxlan_packet_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */