2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vnet/cop/cop.h>
16 #include <vnet/fib/ip4_fib.h>
17 #include <vnet/dpo/load_balance.h>
22 } ip4_cop_whitelist_trace_t;
24 /* packet trace format function */
25 static u8 * format_ip4_cop_whitelist_trace (u8 * s, va_list * args)
27 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
28 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
29 ip4_cop_whitelist_trace_t * t = va_arg (*args, ip4_cop_whitelist_trace_t *);
31 s = format (s, "IP4_COP_WHITELIST: sw_if_index %d, next index %d",
32 t->sw_if_index, t->next_index);
36 vlib_node_registration_t ip4_cop_whitelist_node;
38 #define foreach_ip4_cop_whitelist_error \
39 _(DROPPED, "ip4 cop whitelist packets dropped")
42 #define _(sym,str) IP4_COP_WHITELIST_ERROR_##sym,
43 foreach_ip4_cop_whitelist_error
45 IP4_COP_WHITELIST_N_ERROR,
46 } ip4_cop_whitelist_error_t;
48 static char * ip4_cop_whitelist_error_strings[] = {
49 #define _(sym,string) string,
50 foreach_ip4_cop_whitelist_error
55 ip4_cop_whitelist_node_fn (vlib_main_t * vm,
56 vlib_node_runtime_t * node,
59 u32 n_left_from, * from, * to_next;
60 cop_feature_type_t next_index;
61 cop_main_t *cm = &cop_main;
62 vlib_combined_counter_main_t * vcm = &load_balance_main.lbm_via_counters;
63 u32 thread_index = vm->thread_index;
65 from = vlib_frame_vector_args (frame);
66 n_left_from = frame->n_vectors;
67 next_index = node->cached_next_index;
69 while (n_left_from > 0)
73 vlib_get_next_frame (vm, node, next_index,
74 to_next, n_left_to_next);
76 while (n_left_from >= 4 && n_left_to_next >= 2)
79 vlib_buffer_t * b0, * b1;
81 u32 sw_if_index0, sw_if_index1;
82 ip4_header_t * ip0, * ip1;
83 cop_config_main_t * ccm0, * ccm1;
84 cop_config_data_t * c0, * c1;
85 ip4_fib_mtrie_t * mtrie0, * mtrie1;
86 ip4_fib_mtrie_leaf_t leaf0, leaf1;
87 u32 lb_index0, lb_index1;
88 const load_balance_t * lb0, *lb1;
89 const dpo_id_t *dpo0, *dpo1;
91 /* Prefetch next iteration. */
93 vlib_buffer_t * p2, * p3;
95 p2 = vlib_get_buffer (vm, from[2]);
96 p3 = vlib_get_buffer (vm, from[3]);
98 vlib_prefetch_buffer_header (p2, LOAD);
99 vlib_prefetch_buffer_header (p3, LOAD);
101 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
102 CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
105 /* speculatively enqueue b0 and b1 to the current next frame */
106 to_next[0] = bi0 = from[0];
107 to_next[1] = bi1 = from[1];
113 b0 = vlib_get_buffer (vm, bi0);
114 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
116 ip0 = vlib_buffer_get_current (b0);
118 ccm0 = cm->cop_config_mains + VNET_COP_IP4;
120 c0 = vnet_get_config_data
122 &vnet_buffer (b0)->cop.current_config_index,
126 mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
128 leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
130 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
131 &ip0->src_address, 2);
133 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
134 &ip0->src_address, 3);
136 lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
139 == ip4_fib_table_lookup_lb (ip4_fib_get(c0->fib_index),
141 lb0 = load_balance_get (lb_index0);
142 dpo0 = load_balance_get_bucket_i(lb0, 0);
144 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
146 b0->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
150 b1 = vlib_get_buffer (vm, bi1);
151 sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
153 ip1 = vlib_buffer_get_current (b1);
155 ccm1 = cm->cop_config_mains + VNET_COP_IP4;
157 c1 = vnet_get_config_data
159 &vnet_buffer (b1)->cop.current_config_index,
162 mtrie1 = &ip4_fib_get (c1->fib_index)->mtrie;
164 leaf1 = ip4_fib_mtrie_lookup_step_one (mtrie1, &ip1->src_address);
166 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
167 &ip1->src_address, 2);
169 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
170 &ip1->src_address, 3);
172 lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1);
174 == ip4_fib_table_lookup_lb (ip4_fib_get(c1->fib_index),
176 lb1 = load_balance_get (lb_index1);
177 dpo1 = load_balance_get_bucket_i(lb1, 0);
179 vlib_increment_combined_counter
180 (vcm, thread_index, lb_index0, 1,
181 vlib_buffer_length_in_chain (vm, b0)
182 + sizeof(ethernet_header_t));
184 vlib_increment_combined_counter
185 (vcm, thread_index, lb_index1, 1,
186 vlib_buffer_length_in_chain (vm, b1)
187 + sizeof(ethernet_header_t));
190 if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
192 b1->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
196 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
197 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
199 ip4_cop_whitelist_trace_t *t =
200 vlib_add_trace (vm, node, b0, sizeof (*t));
201 t->sw_if_index = sw_if_index0;
202 t->next_index = next0;
205 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
206 && (b1->flags & VLIB_BUFFER_IS_TRACED)))
208 ip4_cop_whitelist_trace_t *t =
209 vlib_add_trace (vm, node, b1, sizeof (*t));
210 t->sw_if_index = sw_if_index1;
211 t->next_index = next1;
214 /* verify speculative enqueues, maybe switch current next frame */
215 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
216 to_next, n_left_to_next,
217 bi0, bi1, next0, next1);
220 while (n_left_from > 0 && n_left_to_next > 0)
227 cop_config_main_t *ccm0;
228 cop_config_data_t *c0;
229 ip4_fib_mtrie_t * mtrie0;
230 ip4_fib_mtrie_leaf_t leaf0;
232 const load_balance_t * lb0;
233 const dpo_id_t *dpo0;
235 /* speculatively enqueue b0 to the current next frame */
243 b0 = vlib_get_buffer (vm, bi0);
244 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
246 ip0 = vlib_buffer_get_current (b0);
248 ccm0 = cm->cop_config_mains + VNET_COP_IP4;
250 c0 = vnet_get_config_data
252 &vnet_buffer (b0)->cop.current_config_index,
256 mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
258 leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
260 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
261 &ip0->src_address, 2);
263 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
264 &ip0->src_address, 3);
266 lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
269 == ip4_fib_table_lookup_lb (ip4_fib_get(c0->fib_index),
272 lb0 = load_balance_get (lb_index0);
273 dpo0 = load_balance_get_bucket_i(lb0, 0);
275 vlib_increment_combined_counter
276 (vcm, thread_index, lb_index0, 1,
277 vlib_buffer_length_in_chain (vm, b0)
278 + sizeof(ethernet_header_t));
280 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
282 b0->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
286 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
287 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
289 ip4_cop_whitelist_trace_t *t =
290 vlib_add_trace (vm, node, b0, sizeof (*t));
291 t->sw_if_index = sw_if_index0;
292 t->next_index = next0;
295 /* verify speculative enqueue, maybe switch current next frame */
296 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
297 to_next, n_left_to_next,
301 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
303 return frame->n_vectors;
306 VLIB_REGISTER_NODE (ip4_cop_whitelist_node) = {
307 .function = ip4_cop_whitelist_node_fn,
308 .name = "ip4-cop-whitelist",
309 .vector_size = sizeof (u32),
310 .format_trace = format_ip4_cop_whitelist_trace,
311 .type = VLIB_NODE_TYPE_INTERNAL,
313 .n_errors = ARRAY_LEN(ip4_cop_whitelist_error_strings),
314 .error_strings = ip4_cop_whitelist_error_strings,
316 .n_next_nodes = COP_RX_N_FEATURES,
318 /* edit / add dispositions here */
320 [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist",
321 [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist",
322 [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist",
323 [IP4_RX_COP_INPUT] = "ip4-input",
324 [IP6_RX_COP_INPUT] = "ip6-input",
325 [DEFAULT_RX_COP_INPUT] = "ethernet-input",
326 [RX_COP_DROP] = "error-drop",
330 VLIB_NODE_FUNCTION_MULTIARCH (ip4_cop_whitelist_node, ip4_cop_whitelist_node_fn)
332 static clib_error_t *
333 ip4_whitelist_init (vlib_main_t * vm)
338 VLIB_INIT_FUNCTION (ip4_whitelist_init);