/* * 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/vxlan-gpe/vxlan_gpe.h> #include <vnet/vxlan-gpe/vxlan_gpe.h> #include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam_packet.h> #include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam.h> #include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h> /* Statistics (not really errors) */ #define foreach_vxlan_gpe_decap_ioam_v4_error \ _(DECAPSULATED, "good packets decapsulated") static char *vxlan_gpe_decap_ioam_v4_error_strings[] = { #define _(sym,string) string, foreach_vxlan_gpe_decap_ioam_v4_error #undef _ }; typedef enum { #define _(sym,str) VXLAN_GPE_DECAP_IOAM_V4_ERROR_##sym, foreach_vxlan_gpe_decap_ioam_v4_error #undef _ VXLAN_GPE_DECAP_IOAM_V4_N_ERROR, } vxlan_gpe_decap_ioam_v4_error_t; always_inline void vxlan_gpe_decap_ioam_v4_two_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vxlan_gpe_main_t * ngm, vlib_buffer_t * b0, vlib_buffer_t * b1, u32 * next0, u32 * next1) { vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main; *next0 = *next1 = hm->decap_v4_next_override; vxlan_gpe_encap_decap_ioam_v4_one_inline (vm, node, b0, next0, VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP, 0 /* use_adj */ ); vxlan_gpe_encap_decap_ioam_v4_one_inline (vm, node, b1, next1, VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP, 0 /* use_adj */ ); } static uword vxlan_gpe_decap_ioam (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, u8 is_ipv6) { u32 n_left_from, next_index, *from, *to_next; vxlan_gpe_main_t *ngm = &vxlan_gpe_main; vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 4 && n_left_to_next >= 2) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; u32 next0, next1; next0 = next1 = hm->decap_v4_next_override; /* 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 = from[0]; bi1 = from[1]; to_next[0] = bi0; to_next[1] = bi1; from += 2; to_next += 2; n_left_to_next -= 2; n_left_from -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); vlib_buffer_advance (b0, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t) + sizeof (vxlan_gpe_header_t))); vlib_buffer_advance (b1, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t) + sizeof (vxlan_gpe_header_t))); vxlan_gpe_decap_ioam_v4_two_inline (vm, node, ngm, b0, b1, &next0, &next1); vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gpe_ioam_v4_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); } } while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t *b0; u32 next0 = hm->decap_v4_next_override; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); vlib_buffer_advance (b0, -(word) (sizeof (udp_header_t) + sizeof (ip4_header_t) + sizeof (vxlan_gpe_header_t))); next0 = hm->decap_v4_next_override; vxlan_gpe_encap_decap_ioam_v4_one_inline (vm, node, b0, &next0, VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP, 0 /* use_adj */ ); if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { vxlan_gpe_ioam_v4_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); } 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 from_frame->n_vectors; } static uword vxlan_gpe_decap_ioam_v4 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { return vxlan_gpe_decap_ioam (vm, node, from_frame, 0); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (vxlan_gpe_decap_ioam_v4_node) = { .function = vxlan_gpe_decap_ioam_v4, .name = "vxlan-gpe-decap-ioam-v4", .vector_size = sizeof (u32), .format_trace = format_vxlan_gpe_ioam_v4_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(vxlan_gpe_decap_ioam_v4_error_strings), .error_strings = vxlan_gpe_decap_ioam_v4_error_strings, .n_next_nodes = VXLAN_GPE_DECAP_IOAM_V4_N_NEXT, .next_nodes = { [VXLAN_GPE_DECAP_IOAM_V4_NEXT_POP] = "vxlan-gpe-pop-ioam-v4", [VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP] = "error-drop", }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */