diff options
Diffstat (limited to 'plugins/acl-plugin/acl/node_in.c')
| -rw-r--r-- | plugins/acl-plugin/acl/node_in.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/plugins/acl-plugin/acl/node_in.c b/plugins/acl-plugin/acl/node_in.c new file mode 100644 index 00000000..2a5199a9 --- /dev/null +++ b/plugins/acl-plugin/acl/node_in.c @@ -0,0 +1,168 @@ +/* + * 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vppinfra/error.h> +#include <acl/acl.h> +#include "node_in.h" + +typedef struct +{ + u32 next_index; + u32 sw_if_index; + u32 match_acl_index; + u32 match_rule_index; + u32 trace_bitmap; +} acl_in_trace_t; + +/* packet trace format function */ +static u8 * +format_acl_in_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 *); + acl_in_trace_t *t = va_arg (*args, acl_in_trace_t *); + + s = + format (s, + "ACL_IN: sw_if_index %d, next index %d, match: inacl %d rule %d trace_bits %08x", + t->sw_if_index, t->next_index, t->match_acl_index, + t->match_rule_index, t->trace_bitmap); + return s; +} + +vlib_node_registration_t acl_in_node; + +#define foreach_acl_in_error \ +_(ACL_CHECK, "InACL check packets processed") + +typedef enum +{ +#define _(sym,str) ACL_IN_ERROR_##sym, + foreach_acl_in_error +#undef _ + ACL_IN_N_ERROR, +} acl_in_error_t; + +static char *acl_in_error_strings[] = { +#define _(sym,string) string, + foreach_acl_in_error +#undef _ +}; + +static uword +acl_in_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + u32 n_left_from, *from, *to_next; + acl_in_next_t next_index; + u32 pkts_acl_checked = 0; + u32 feature_bitmap0; + u32 trace_bitmap = 0; + u32 *input_feat_next_node_index = + acl_main.acl_in_node_input_next_node_index; + + 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 > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0 = ~0; + u32 sw_if_index0; + u32 next = ~0; + u32 match_acl_index = ~0; + u32 match_rule_index = ~0; + + /* 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); + + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + feature_bitmap0 = vnet_buffer (b0)->l2.feature_bitmap; + + input_acl_packet_match (sw_if_index0, b0, &next, &match_acl_index, + &match_rule_index, &trace_bitmap); + if (next != ~0) + { + next0 = next; + } + if (next0 == ~0) + { + next0 = + feat_bitmap_get_next_node_index (input_feat_next_node_index, + feature_bitmap0); + } + + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + acl_in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->match_acl_index = match_acl_index; + t->match_rule_index = match_rule_index; + t->trace_bitmap = trace_bitmap; + } + + next0 = next0 < node->n_next_nodes ? next0 : 0; + + pkts_acl_checked += 1; + + /* 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, acl_in_node.index, + ACL_IN_ERROR_ACL_CHECK, pkts_acl_checked); + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (acl_in_node) = +{ + .function = acl_in_node_fn,.name = "acl-plugin-in",.vector_size = + sizeof (u32),.format_trace = format_acl_in_trace,.type = + VLIB_NODE_TYPE_INTERNAL,.n_errors = + ARRAY_LEN (acl_in_error_strings),.error_strings = + acl_in_error_strings,.n_next_nodes = ACL_IN_N_NEXT, + /* edit / add dispositions here */ + .next_nodes = + { + [ACL_IN_ERROR_DROP] = "error-drop", + [ACL_IN_ETHERNET_INPUT] = "ethernet-input", + [ACL_IN_L2S_INPUT_IP4_ADD] = "aclp-l2s-input-ip4-add", + [ACL_IN_L2S_INPUT_IP6_ADD] = "aclp-l2s-input-ip6-add",} +,}; |