+++ /dev/null
-/*
- * decap.c: vxlan gbp tunnel decap packet processing
- *
- * Copyright (c) 2018 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 <vnet/vxlan-gbp/vxlan_gbp.h>
-
-typedef struct
-{
- u32 next_index;
- u32 tunnel_index;
- u32 error;
- u32 vni;
- u16 sclass;
- u8 flags;
-} vxlan_gbp_rx_trace_t;
-
-static u8 *
-format_vxlan_gbp_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_gbp_rx_trace_t *t = va_arg (*args, vxlan_gbp_rx_trace_t *);
-
- if (t->tunnel_index == ~0)
- return format (s,
- "VXLAN_GBP decap error - tunnel for vni %d does not exist",
- t->vni);
- return format (s,
- "VXLAN_GBP decap from vxlan_gbp_tunnel%d vni %d sclass %d"
- " flags %U next %d error %d",
- t->tunnel_index, t->vni, t->sclass,
- format_vxlan_gbp_header_gpflags, t->flags,
- t->next_index, t->error);
-}
-
-always_inline u32
-buf_fib_index (vlib_buffer_t * b, u32 is_ip4)
-{
- u32 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
- if (sw_if_index != (u32) ~ 0)
- return sw_if_index;
-
- u32 *fib_index_by_sw_if_index = is_ip4 ?
- ip4_main.fib_index_by_sw_if_index : ip6_main.fib_index_by_sw_if_index;
- sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
-
- return vec_elt (fib_index_by_sw_if_index, sw_if_index);
-}
-
-typedef vxlan4_gbp_tunnel_key_t last_tunnel_cache4;
-
-always_inline vxlan_gbp_tunnel_t *
-vxlan4_gbp_find_tunnel (vxlan_gbp_main_t * vxm, last_tunnel_cache4 * cache,
- u32 fib_index, ip4_header_t * ip4_0,
- vxlan_gbp_header_t * vxlan_gbp0)
-{
- /*
- * Check unicast first since that's where most of the traffic comes from
- * Make sure VXLAN_GBP tunnel exist according to packet SIP, DIP and VNI
- */
- vxlan4_gbp_tunnel_key_t key4;
- int rv;
-
- key4.key[1] = (((u64) fib_index << 32) |
- (vxlan_gbp0->vni_reserved &
- clib_host_to_net_u32 (0xffffff00)));
- key4.key[0] =
- (((u64) ip4_0->dst_address.as_u32 << 32) | ip4_0->src_address.as_u32);
-
- if (PREDICT_FALSE (key4.key[0] != cache->key[0] ||
- key4.key[1] != cache->key[1]))
- {
- rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_gbp_tunnel_by_key,
- &key4);
- if (PREDICT_FALSE (rv == 0))
- {
- *cache = key4;
- return (pool_elt_at_index (vxm->tunnels, cache->value));
- }
- }
- else
- {
- return (pool_elt_at_index (vxm->tunnels, cache->value));
- }
-
- /* No unicast match - try multicast */
- if (PREDICT_TRUE (!ip4_address_is_multicast (&ip4_0->dst_address)))
- return (NULL);
-
- key4.key[0] = ip4_0->dst_address.as_u32;
- /* Make sure mcast VXLAN_GBP tunnel exist by packet DIP and VNI */
- rv = clib_bihash_search_inline_16_8 (&vxm->vxlan4_gbp_tunnel_by_key, &key4);
-
- if (PREDICT_FALSE (rv != 0))
- return (NULL);
-
- return (pool_elt_at_index (vxm->tunnels, key4.value));
-}
-
-typedef vxlan6_gbp_tunnel_key_t last_tunnel_cache6;
-
-always_inline vxlan_gbp_tunnel_t *
-vxlan6_gbp_find_tunnel (vxlan_gbp_main_t * vxm, last_tunnel_cache6 * cache,
- u32 fib_index, ip6_header_t * ip6_0,
- vxlan_gbp_header_t * vxlan_gbp0)
-{
- /* Make sure VXLAN_GBP tunnel exist according to packet SIP and VNI */
- vxlan6_gbp_tunnel_key_t key6 = {
- .key = {
- [0] = ip6_0->src_address.as_u64[0],
- [1] = ip6_0->src_address.as_u64[1],
- [2] = ((((u64) fib_index) << 32) |
- (vxlan_gbp0->vni_reserved &
- clib_host_to_net_u32 (0xffffff00))),
- }
- };
- int rv;
-
- if (PREDICT_FALSE
- (clib_bihash_key_compare_24_8 (key6.key, cache->key) == 0))
- {
- rv = clib_bihash_search_inline_24_8 (&vxm->vxlan6_gbp_tunnel_by_key,
- &key6);
- if (PREDICT_FALSE (rv != 0))
- return NULL;
-
- *cache = key6;
- }
- vxlan_gbp_tunnel_t *t0 = pool_elt_at_index (vxm->tunnels, cache->value);
-
- /* Validate VXLAN_GBP tunnel SIP against packet DIP */
- if (PREDICT_FALSE
- (!ip6_address_is_equal (&ip6_0->dst_address, &t0->src.ip6)))
- {
- /* try multicast */
- if (PREDICT_TRUE (!ip6_address_is_multicast (&ip6_0->dst_address)))
- return 0;
-
- /* Make sure mcast VXLAN_GBP 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];
- rv = clib_bihash_search_inline_24_8 (&vxm->vxlan6_gbp_tunnel_by_key,
- &key6);
- if (PREDICT_FALSE (rv != 0))
- return 0;
-
- }
-
- return t0;
-}
-
-always_inline vxlan_gbp_input_next_t
-vxlan_gbp_tunnel_get_next (const vxlan_gbp_tunnel_t * t, vlib_buffer_t * b0)
-{
- if (VXLAN_GBP_TUNNEL_MODE_L2 == t->mode)
- return (VXLAN_GBP_INPUT_NEXT_L2_INPUT);
- else
- {
- ethernet_header_t *e0;
- u16 type0;
-
- e0 = vlib_buffer_get_current (b0);
- vlib_buffer_advance (b0, sizeof (*e0));
- type0 = clib_net_to_host_u16 (e0->type);
- switch (type0)
- {
- case ETHERNET_TYPE_IP4:
- return (VXLAN_GBP_INPUT_NEXT_IP4_INPUT);
- case ETHERNET_TYPE_IP6:
- return (VXLAN_GBP_INPUT_NEXT_IP6_INPUT);
- }
- }
- return (VXLAN_GBP_INPUT_NEXT_DROP);
-}
-
-always_inline uword
-vxlan_gbp_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, u8 is_ip4)
-{
- vxlan_gbp_main_t *vxm = &vxlan_gbp_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;
- vlib_combined_counter_main_t *drop_counter =
- im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP;
- last_tunnel_cache4 last4;
- last_tunnel_cache6 last6;
- u32 pkts_decapsulated = 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 next_index = node->cached_next_index;
-
- u32 *from = vlib_frame_vector_args (from_frame);
- u32 n_left_from = from_frame->n_vectors;
-
- while (n_left_from > 0)
- {
- u32 *to_next, 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_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- 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, *b1;
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- /* udp leaves current_data pointing at the vxlan_gbp header */
- void *cur0 = vlib_buffer_get_current (b0);
- void *cur1 = vlib_buffer_get_current (b1);
- vxlan_gbp_header_t *vxlan_gbp0 = cur0;
- vxlan_gbp_header_t *vxlan_gbp1 = 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);
- }
-
- u32 fi0 = buf_fib_index (b0, is_ip4);
- u32 fi1 = buf_fib_index (b1, is_ip4);
-
- vxlan_gbp_tunnel_t *t0, *t1;
- if (is_ip4)
- {
- t0 =
- vxlan4_gbp_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan_gbp0);
- t1 =
- vxlan4_gbp_find_tunnel (vxm, &last4, fi1, ip4_1, vxlan_gbp1);
- }
- else
- {
- t0 =
- vxlan6_gbp_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan_gbp0);
- t1 =
- vxlan6_gbp_find_tunnel (vxm, &last6, fi1, ip6_1, vxlan_gbp1);
- }
-
- u32 len0 = vlib_buffer_length_in_chain (vm, b0);
- u32 len1 = vlib_buffer_length_in_chain (vm, b1);
-
- vxlan_gbp_input_next_t next0, next1;
- u8 error0 = 0, error1 = 0;
- u8 flags0 = vxlan_gbp_get_flags (vxlan_gbp0);
- u8 flags1 = vxlan_gbp_get_flags (vxlan_gbp1);
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- /* pop vxlan_gbp */
- vlib_buffer_advance (b0, sizeof *vxlan_gbp0);
- vlib_buffer_advance (b1, sizeof *vxlan_gbp1);
-
- u8 i_and_g0 = ((flags0 & VXLAN_GBP_FLAGS_GI) == VXLAN_GBP_FLAGS_GI);
- u8 i_and_g1 = ((flags1 & VXLAN_GBP_FLAGS_GI) == VXLAN_GBP_FLAGS_GI);
-
- /* Validate VXLAN_GBP tunnel encap-fib index against packet */
- if (PREDICT_FALSE (t0 == NULL || !i_and_g0))
- {
- if (t0 != NULL && !i_and_g0)
- {
- error0 = VXLAN_GBP_ERROR_BAD_FLAGS;
- vlib_increment_combined_counter
- (drop_counter, thread_index, t0->sw_if_index, 1, len0);
- next0 = VXLAN_GBP_INPUT_NEXT_DROP;
- }
- else
- {
- error0 = VXLAN_GBP_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_GBP_INPUT_NEXT_PUNT;
- if (is_ip4)
- b0->punt_reason =
- vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP4];
- else
- b0->punt_reason =
- vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP6];
- }
- b0->error = node->errors[error0];
- }
- else
- {
- next0 = vxlan_gbp_tunnel_get_next (t0, b0);
-
- /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
- vlib_increment_combined_counter
- (rx_counter, thread_index, t0->sw_if_index, 1, len0);
- pkts_decapsulated++;
- }
-
- vnet_buffer2 (b0)->gbp.flags = (vxlan_gbp_get_gpflags (vxlan_gbp0) |
- VXLAN_GBP_GPFLAGS_R);
- vnet_buffer2 (b0)->gbp.sclass = vxlan_gbp_get_sclass (vxlan_gbp0);
-
-
- if (PREDICT_FALSE (t1 == NULL || !i_and_g1))
- {
- if (t1 != NULL && !i_and_g1)
- {
- error1 = VXLAN_GBP_ERROR_BAD_FLAGS;
- vlib_increment_combined_counter
- (drop_counter, thread_index, t1->sw_if_index, 1, len1);
- next1 = VXLAN_GBP_INPUT_NEXT_DROP;
- }
- else
- {
- error1 = VXLAN_GBP_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_GBP_INPUT_NEXT_PUNT;
- if (is_ip4)
- b1->punt_reason =
- vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP4];
- else
- b1->punt_reason =
- vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP6];
- }
- b1->error = node->errors[error1];
- }
- else
- {
- next1 = vxlan_gbp_tunnel_get_next (t1, b1);
-
- /* Set packet input sw_if_index to unicast VXLAN_GBP tunnel for learning */
- vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;
- pkts_decapsulated++;
-
- vlib_increment_combined_counter
- (rx_counter, thread_index, t1->sw_if_index, 1, len1);
- }
-
- vnet_buffer2 (b1)->gbp.flags = (vxlan_gbp_get_gpflags (vxlan_gbp1) |
- VXLAN_GBP_GPFLAGS_R);
-
- vnet_buffer2 (b1)->gbp.sclass = vxlan_gbp_get_sclass (vxlan_gbp1);
-
- vnet_update_l2_len (b0);
- vnet_update_l2_len (b1);
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_gbp_rx_trace_t *tr =
- vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->next_index = next0;
- tr->error = error0;
- tr->tunnel_index = t0 == 0 ? ~0 : t0 - vxm->tunnels;
- tr->vni = vxlan_gbp_get_vni (vxlan_gbp0);
- tr->sclass = vxlan_gbp_get_sclass (vxlan_gbp0);
- tr->flags = vxlan_gbp_get_gpflags (vxlan_gbp0);
- }
- if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_gbp_rx_trace_t *tr =
- vlib_add_trace (vm, node, b1, sizeof (*tr));
- tr->next_index = next1;
- tr->error = error1;
- tr->tunnel_index = t1 == 0 ? ~0 : t1 - vxm->tunnels;
- tr->vni = vxlan_gbp_get_vni (vxlan_gbp1);
- tr->sclass = vxlan_gbp_get_sclass (vxlan_gbp1);
- tr->flags = vxlan_gbp_get_gpflags (vxlan_gbp1);
- }
-
- 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 = vlib_get_buffer (vm, bi0);
-
- /* udp leaves current_data pointing at the vxlan_gbp header */
- void *cur0 = vlib_buffer_get_current (b0);
- vxlan_gbp_header_t *vxlan_gbp0 = 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);
-
- u32 fi0 = buf_fib_index (b0, is_ip4);
-
- vxlan_gbp_tunnel_t *t0;
- if (is_ip4)
- t0 = vxlan4_gbp_find_tunnel (vxm, &last4, fi0, ip4_0, vxlan_gbp0);
- else
- t0 = vxlan6_gbp_find_tunnel (vxm, &last6, fi0, ip6_0, vxlan_gbp0);
-
- uword len0 = vlib_buffer_length_in_chain (vm, b0);
-
- vxlan_gbp_input_next_t next0;
- u8 error0 = 0;
- u8 flags0 = vxlan_gbp_get_flags (vxlan_gbp0);
-
- /* pop (ip, udp, vxlan_gbp) */
- vlib_buffer_advance (b0, sizeof (*vxlan_gbp0));
-
- u8 i_and_g0 = ((flags0 & VXLAN_GBP_FLAGS_GI) == VXLAN_GBP_FLAGS_GI);
-
- /* Validate VXLAN_GBP tunnel encap-fib index against packet */
- if (PREDICT_FALSE (t0 == NULL || !i_and_g0))
- {
- if (t0 != NULL && !i_and_g0)
- {
- error0 = VXLAN_GBP_ERROR_BAD_FLAGS;
- vlib_increment_combined_counter
- (drop_counter, thread_index, t0->sw_if_index, 1, len0);
- next0 = VXLAN_GBP_INPUT_NEXT_DROP;
- }
- else
- {
- error0 = VXLAN_GBP_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_GBP_INPUT_NEXT_PUNT;
- if (is_ip4)
- b0->punt_reason =
- vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP4];
- else
- b0->punt_reason =
- vxm->punt_no_such_tunnel[FIB_PROTOCOL_IP6];
- }
- b0->error = node->errors[error0];
- }
- else
- {
- next0 = vxlan_gbp_tunnel_get_next (t0, b0);
- /* Set packet input sw_if_index to unicast VXLAN_GBP tunnel for learning */
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
- pkts_decapsulated++;
-
- vlib_increment_combined_counter
- (rx_counter, thread_index, t0->sw_if_index, 1, len0);
- }
- vnet_buffer2 (b0)->gbp.flags = (vxlan_gbp_get_gpflags (vxlan_gbp0) |
- VXLAN_GBP_GPFLAGS_R);
-
- vnet_buffer2 (b0)->gbp.sclass = vxlan_gbp_get_sclass (vxlan_gbp0);
-
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- vnet_update_l2_len (b0);
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vxlan_gbp_rx_trace_t *tr
- = vlib_add_trace (vm, node, b0, sizeof (*tr));
- tr->next_index = next0;
- tr->error = error0;
- tr->tunnel_index = t0 == 0 ? ~0 : t0 - vxm->tunnels;
- tr->vni = vxlan_gbp_get_vni (vxlan_gbp0);
- tr->sclass = vxlan_gbp_get_sclass (vxlan_gbp0);
- tr->flags = vxlan_gbp_get_gpflags (vxlan_gbp0);
- }
- 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? */
- u32 node_idx =
- is_ip4 ? vxlan4_gbp_input_node.index : vxlan6_gbp_input_node.index;
- vlib_node_increment_counter (vm, node_idx, VXLAN_GBP_ERROR_DECAPSULATED,
- pkts_decapsulated);
-
- return from_frame->n_vectors;
-}
-
-VLIB_NODE_FN (vxlan4_gbp_input_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return vxlan_gbp_input (vm, node, from_frame, /* is_ip4 */ 1);
-}
-
-VLIB_NODE_FN (vxlan6_gbp_input_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return vxlan_gbp_input (vm, node, from_frame, /* is_ip4 */ 0);
-}
-
-static char *vxlan_gbp_error_strings[] = {
-#define vxlan_gbp_error(n,s) s,
-#include <vnet/vxlan-gbp/vxlan_gbp_error.def>
-#undef vxlan_gbp_error
-#undef _
-};
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (vxlan4_gbp_input_node) =
-{
- .name = "vxlan4-gbp-input",
- .vector_size = sizeof (u32),
- .n_errors = VXLAN_GBP_N_ERROR,
- .error_strings = vxlan_gbp_error_strings,
- .n_next_nodes = VXLAN_GBP_INPUT_N_NEXT,
- .format_trace = format_vxlan_gbp_rx_trace,
- .next_nodes = {
-#define _(s,n) [VXLAN_GBP_INPUT_NEXT_##s] = n,
- foreach_vxlan_gbp_input_next
-#undef _
- },
-};
-
-VLIB_REGISTER_NODE (vxlan6_gbp_input_node) =
-{
- .name = "vxlan6-gbp-input",
- .vector_size = sizeof (u32),
- .n_errors = VXLAN_GBP_N_ERROR,
- .error_strings = vxlan_gbp_error_strings,
- .n_next_nodes = VXLAN_GBP_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [VXLAN_GBP_INPUT_NEXT_##s] = n,
- foreach_vxlan_gbp_input_next
-#undef _
- },
- .format_trace = format_vxlan_gbp_rx_trace,
-};
-/* *INDENT-ON* */
-
-typedef enum
-{
- IP_VXLAN_GBP_BYPASS_NEXT_DROP,
- IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP,
- IP_VXLAN_GBP_BYPASS_N_NEXT,
-} ip_vxlan_gbp_bypass_next_t;
-
-always_inline uword
-ip_vxlan_gbp_bypass_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, u32 is_ip4)
-{
- vxlan_gbp_main_t *vxm = &vxlan_gbp_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);
- ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */
- ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- if (node->flags & VLIB_NODE_FLAG_TRACE)
- ip4_forward_next_trace (vm, node, frame, VLIB_TX);
-
- if (is_ip4)
- addr4.data_u32 = ~0;
- else
- ip6_address_set_zero (&addr6);
-
- 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;
- 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;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- 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 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
- 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);
-
- if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gbp))
- goto exit0; /* not VXLAN_GBP packet */
-
- /* Validate DIP against VTEPs */
- if (is_ip4)
- {
- if (addr4.as_u32 != ip40->dst_address.as_u32)
- {
- if (!hash_get (vxm->vtep4, ip40->dst_address.as_u32))
- goto exit0; /* no local VTEP for VXLAN_GBP packet */
- addr4 = ip40->dst_address;
- }
- }
- else
- {
- if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
- {
- if (!hash_get_mem (vxm->vtep6, &ip60->dst_address))
- goto exit0; /* no local VTEP for VXLAN_GBP packet */
- addr6 = ip60->dst_address;
- }
- }
-
- 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 ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
- {
- 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_GBP_BYPASS_NEXT_DROP :
- IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP;
- b0->error = error0 ? error_node->errors[error0] : 0;
-
- /* vxlan-gbp-input node expect current at VXLAN_GBP 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);
-
- if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gbp))
- goto exit1; /* not VXLAN_GBP packet */
-
- /* Validate DIP against VTEPs */
- if (is_ip4)
- {
- if (addr4.as_u32 != ip41->dst_address.as_u32)
- {
- if (!hash_get (vxm->vtep4, ip41->dst_address.as_u32))
- goto exit1; /* no local VTEP for VXLAN_GBP packet */
- addr4 = ip41->dst_address;
- }
- }
- else
- {
- if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
- {
- if (!hash_get_mem (vxm->vtep6, &ip61->dst_address))
- goto exit1; /* no local VTEP for VXLAN_GBP packet */
- addr6 = ip61->dst_address;
- }
- }
-
- 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 ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
- {
- 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_GBP_BYPASS_NEXT_DROP :
- IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP;
- b1->error = error1 ? error_node->errors[error1] : 0;
-
- /* vxlan_gbp-input node expect current at VXLAN_GBP 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;
- u32 bi0, ip_len0, udp_len0, flags0, next0;
- i32 len_diff0;
- u8 error0, good_udp0, proto0;
-
- bi0 = to_next[0] = from[0];
- from += 1;
- n_left_from -= 1;
- to_next += 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- 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);
-
- if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gbp))
- goto exit; /* not VXLAN_GBP packet */
-
- /* Validate DIP against VTEPs */
- if (is_ip4)
- {
- if (addr4.as_u32 != ip40->dst_address.as_u32)
- {
- if (!hash_get (vxm->vtep4, ip40->dst_address.as_u32))
- goto exit; /* no local VTEP for VXLAN_GBP packet */
- addr4 = ip40->dst_address;
- }
- }
- else
- {
- if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
- {
- if (!hash_get_mem (vxm->vtep6, &ip60->dst_address))
- goto exit; /* no local VTEP for VXLAN_GBP packet */
- addr6 = ip60->dst_address;
- }
- }
-
- 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 ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
- {
- 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_GBP_BYPASS_NEXT_DROP :
- IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP;
- b0->error = error0 ? error_node->errors[error0] : 0;
-
- /* vxlan_gbp-input node expect current at VXLAN_GBP 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_gbp_bypass_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return ip_vxlan_gbp_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip4_vxlan_gbp_bypass_node) =
-{
- .name = "ip4-vxlan-gbp-bypass",
- .vector_size = sizeof (u32),
- .n_next_nodes = IP_VXLAN_GBP_BYPASS_N_NEXT,
- .next_nodes = {
- [IP_VXLAN_GBP_BYPASS_NEXT_DROP] = "error-drop",
- [IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP] = "vxlan4-gbp-input",
- },
- .format_buffer = format_ip4_header,
- .format_trace = format_ip4_forward_next_trace,
-};
-/* *INDENT-ON* */
-
-#ifndef CLIB_MARCH_VARIANT
-/* Dummy init function to get us linked in. */
-clib_error_t *
-ip4_vxlan_gbp_bypass_init (vlib_main_t * vm)
-{
- return 0;
-}
-
-VLIB_INIT_FUNCTION (ip4_vxlan_gbp_bypass_init);
-#endif /* CLIB_MARCH_VARIANT */
-
-VLIB_NODE_FN (ip6_vxlan_gbp_bypass_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return ip_vxlan_gbp_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip6_vxlan_gbp_bypass_node) =
-{
- .name = "ip6-vxlan-gbp-bypass",
- .vector_size = sizeof (u32),
- .n_next_nodes = IP_VXLAN_GBP_BYPASS_N_NEXT,
- .next_nodes = {
- [IP_VXLAN_GBP_BYPASS_NEXT_DROP] = "error-drop",
- [IP_VXLAN_GBP_BYPASS_NEXT_VXLAN_GBP] = "vxlan6-gbp-input",
- },
- .format_buffer = format_ip6_header,
- .format_trace = format_ip6_forward_next_trace,
-};
-/* *INDENT-ON* */
-
-#ifndef CLIB_MARCH_VARIANT
-/* Dummy init function to get us linked in. */
-clib_error_t *
-ip6_vxlan_gbp_bypass_init (vlib_main_t * vm)
-{
- return 0;
-}
-
-VLIB_INIT_FUNCTION (ip6_vxlan_gbp_bypass_init);
-#endif /* CLIB_MARCH_VARIANT */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff