diff options
Diffstat (limited to 'src/vnet/vxlan-gbp/decap.c')
| -rw-r--r-- | src/vnet/vxlan-gbp/decap.c | 1050 |
1 files changed, 0 insertions, 1050 deletions
diff --git a/src/vnet/vxlan-gbp/decap.c b/src/vnet/vxlan-gbp/decap.c deleted file mode 100644 index 927c778b211..00000000000 --- a/src/vnet/vxlan-gbp/decap.c +++ /dev/null @@ -1,1050 +0,0 @@ -/* - * 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: - */ |