/* * Copyright (c) 2016,2020 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 <plugins/adl/adl.h> #include <vnet/pg/pg.h> typedef struct { u32 next_index; u32 sw_if_index; } adl_input_trace_t; /* packet trace format function */ static u8 * format_adl_input_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 *); adl_input_trace_t * t = va_arg (*args, adl_input_trace_t *); s = format (s, "ADL_INPUT: sw_if_index %d, next index %d", t->sw_if_index, t->next_index); return s; } #define foreach_adl_input_error \ _(PROCESSED, "Allow/Deny packets processed") typedef enum { #define _(sym,str) ADL_INPUT_ERROR_##sym, foreach_adl_input_error #undef _ ADL_INPUT_N_ERROR, } adl_input_error_t; static char * adl_input_error_strings[] = { #define _(sym,string) string, foreach_adl_input_error #undef _ }; VLIB_NODE_FN (adl_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, * from, * to_next; adl_feature_type_t next_index; adl_main_t *am = &adl_main; from = vlib_frame_vector_args (frame); n_left_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; u32 sw_if_index0, sw_if_index1; ethernet_header_t * en0, * en1; adl_config_main_t * ccm0, * ccm1; u32 advance0, advance1; int proto0, 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, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); } /* speculatively enqueue b0 and b1 to the current next frame */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); en0 = vlib_buffer_get_current (b0); en1 = vlib_buffer_get_current (b1); sw_if_index0 = adl_buffer(b0)->sw_if_index[VLIB_RX]; sw_if_index1 = adl_buffer(b1)->sw_if_index[VLIB_RX]; proto0 = VNET_ADL_DEFAULT; proto1 = VNET_ADL_DEFAULT; advance0 = 0; advance1 = 0; if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) { proto0 = VNET_ADL_IP4; advance0 = sizeof(ethernet_header_t); } else if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) { proto0 = VNET_ADL_IP6; advance0 = sizeof(ethernet_header_t); } if (en1->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) { proto1 = VNET_ADL_IP4; advance1 = sizeof(ethernet_header_t); } else if (en1->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) { proto1 = VNET_ADL_IP6; advance1 = sizeof(ethernet_header_t); } ccm0 = am->adl_config_mains + proto0; ccm1 = am->adl_config_mains + proto1; adl_buffer(b0)->adl.current_config_index = ccm0->config_index_by_sw_if_index [sw_if_index0]; adl_buffer(b1)->adl.current_config_index = ccm1->config_index_by_sw_if_index [sw_if_index1]; vlib_buffer_advance (b0, advance0); vlib_buffer_advance (b1, advance1); vnet_get_config_data (&ccm0->config_main, &adl_buffer(b0)->adl.current_config_index, &next0, 0 /* bytes of config data */); vnet_get_config_data (&ccm1->config_main, &adl_buffer(b1)->adl.current_config_index, &next1, 0 /* bytes of config data */); if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { adl_input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; t->next_index = next0; } if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) && (b1->flags & VLIB_BUFFER_IS_TRACED))) { adl_input_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->sw_if_index = sw_if_index1; t->next_index = next1; } /* verify speculative enqueues, maybe switch current next frame */ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t * b0; u32 next0; u32 sw_if_index0; ethernet_header_t *en0; adl_config_main_t *ccm0; u32 advance0; int proto0; /* speculatively enqueue b0 to the current next frame */ 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); /* * Direct from the driver, we should be at offset 0 * aka at &b0->data[0] */ ASSERT (b0->current_data == 0); en0 = vlib_buffer_get_current (b0); sw_if_index0 = adl_buffer(b0)->sw_if_index[VLIB_RX]; proto0 = VNET_ADL_DEFAULT; advance0 = 0; if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) { proto0 = VNET_ADL_IP4; advance0 = sizeof(ethernet_header_t); } else if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) { proto0 = VNET_ADL_IP6; advance0 = sizeof(ethernet_header_t); } ccm0 = am->adl_config_mains + proto0; adl_buffer(b0)->adl.current_config_index = ccm0->config_index_by_sw_if_index [sw_if_index0]; vlib_buffer_advance (b0, advance0); vnet_get_config_data (&ccm0->config_main, &adl_buffer(b0)->adl.current_config_index, &next0, 0 /* bytes of config data */); if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { adl_input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; t->next_index = next0; } /* verify speculative enqueue, maybe switch current next frame */ 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); } vlib_node_increment_counter (vm, adl_input_node.index, ADL_INPUT_ERROR_PROCESSED, frame->n_vectors); return frame->n_vectors; } VLIB_REGISTER_NODE (adl_input_node) = { .name = "adl-input", .vector_size = sizeof (u32), .format_trace = format_adl_input_trace, .unformat_buffer = unformat_ethernet_header, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(adl_input_error_strings), .error_strings = adl_input_error_strings, .n_next_nodes = ADL_RX_N_FEATURES, /* edit / add dispositions here */ .next_nodes = { [IP4_RX_ADL_ALLOWLIST] = "ip4-adl-allowlist", [IP6_RX_ADL_ALLOWLIST] = "ip6-adl-allowlist", [DEFAULT_RX_ADL_ALLOWLIST] = "default-adl-allowlist", [IP4_RX_ADL_INPUT] = "ip4-input", [IP6_RX_ADL_INPUT] = "ip6-input", [DEFAULT_RX_ADL_INPUT] = "ethernet-input", [RX_ADL_DROP] = "error-drop", }, }; #define foreach_adl_stub \ _(default-adl-allowlist, default_adl_allowlist) #define _(n,f) \ \ static uword \ f##_node_fn (vlib_main_t * vm, \ vlib_node_runtime_t * node, \ vlib_frame_t * frame) \ { \ clib_warning ("BUG: stub function called"); \ return 0; \ } \ \ VLIB_REGISTER_NODE (f##_input_node) = { \ .function = f##_node_fn, \ .name = #n, \ .vector_size = sizeof (u32), \ .type = VLIB_NODE_TYPE_INTERNAL, \ \ .n_errors = 0, \ .error_strings = 0, \ \ .n_next_nodes = 0, \ }; foreach_adl_stub;