diff options
Diffstat (limited to 'src/vnet/cop/node1.c')
| -rw-r--r-- | src/vnet/cop/node1.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/src/vnet/cop/node1.c b/src/vnet/cop/node1.c new file mode 100644 index 00000000..b448b531 --- /dev/null +++ b/src/vnet/cop/node1.c @@ -0,0 +1,319 @@ +/* + * 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/cop/cop.h> + +typedef struct { + u32 next_index; + u32 sw_if_index; +} cop_input_trace_t; + +/* packet trace format function */ +static u8 * format_cop_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 *); + cop_input_trace_t * t = va_arg (*args, cop_input_trace_t *); + + s = format (s, "COP_INPUT: sw_if_index %d, next index %d", + t->sw_if_index, t->next_index); + return s; +} + +vlib_node_registration_t cop_input_node; + +#define foreach_cop_input_error \ +_(PROCESSED, "COP input packets processed") + +typedef enum { +#define _(sym,str) COP_INPUT_ERROR_##sym, + foreach_cop_input_error +#undef _ + COP_INPUT_N_ERROR, +} cop_input_error_t; + +static char * cop_input_error_strings[] = { +#define _(sym,string) string, + foreach_cop_input_error +#undef _ +}; + +static uword +cop_input_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + u32 n_left_from, * from, * to_next; + cop_feature_type_t next_index; + cop_main_t *cm = &cop_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; + cop_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 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + + proto0 = VNET_COP_DEFAULT; + proto1 = VNET_COP_DEFAULT; + advance0 = 0; + advance1 = 0; + + if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) + { + proto0 = VNET_COP_IP4; + advance0 = sizeof(ethernet_header_t); + } + else if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) + { + proto0 = VNET_COP_IP6; + advance0 = sizeof(ethernet_header_t); + } + + if (en1->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) + { + proto1 = VNET_COP_IP4; + advance1 = sizeof(ethernet_header_t); + } + else if (en1->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) + { + proto1 = VNET_COP_IP6; + advance1 = sizeof(ethernet_header_t); + } + + ccm0 = cm->cop_config_mains + proto0; + ccm1 = cm->cop_config_mains + proto1; + vnet_buffer(b0)->cop.current_config_index = + ccm0->config_index_by_sw_if_index [sw_if_index0]; + + vnet_buffer(b1)->cop.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, + &vnet_buffer(b0)->cop.current_config_index, + &next0, 0 /* bytes of config data */); + + vnet_get_config_data (&ccm1->config_main, + &vnet_buffer(b1)->cop.current_config_index, + &next1, 0 /* bytes of config data */); + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + cop_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))) + { + cop_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; + cop_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 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + + proto0 = VNET_COP_DEFAULT; + advance0 = 0; + + if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) + { + proto0 = VNET_COP_IP4; + advance0 = sizeof(ethernet_header_t); + } + else if (en0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) + { + proto0 = VNET_COP_IP6; + advance0 = sizeof(ethernet_header_t); + } + + ccm0 = cm->cop_config_mains + proto0; + vnet_buffer(b0)->cop.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, + &vnet_buffer(b0)->cop.current_config_index, + &next0, 0 /* bytes of config data */); + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + cop_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, cop_input_node.index, + COP_INPUT_ERROR_PROCESSED, frame->n_vectors); + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (cop_input_node) = { + .function = cop_input_node_fn, + .name = "cop-input", + .vector_size = sizeof (u32), + .format_trace = format_cop_input_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(cop_input_error_strings), + .error_strings = cop_input_error_strings, + + .n_next_nodes = COP_RX_N_FEATURES, + + /* edit / add dispositions here */ + .next_nodes = { + [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist", + [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist", + [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist", + [IP4_RX_COP_INPUT] = "ip4-input", + [IP6_RX_COP_INPUT] = "ip6-input", + [DEFAULT_RX_COP_INPUT] = "ethernet-input", + [RX_COP_DROP] = "error-drop", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (cop_input_node, cop_input_node_fn) + +#define foreach_cop_stub \ +_(default-cop-whitelist, default_cop_whitelist) + +#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_cop_stub; + + + + + + |