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 cpu_index = vm->cpu_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, 1);
133 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
134 &ip0->src_address, 2);
136 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
137 &ip0->src_address, 3);
139 lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
142 == ip4_fib_table_lookup_lb (ip4_fib_get(c0->fib_index),
144 lb0 = load_balance_get (lb_index0);
145 dpo0 = load_balance_get_bucket_i(lb0, 0);
147 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
149 b0->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
153 b1 = vlib_get_buffer (vm, bi1);
154 sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
156 ip1 = vlib_buffer_get_current (b1);
158 ccm1 = cm->cop_config_mains + VNET_COP_IP4;
160 c1 = vnet_get_config_data
162 &vnet_buffer (b1)->cop.current_config_index,
165 mtrie1 = &ip4_fib_get (c1->fib_index)->mtrie;
167 leaf1 = ip4_fib_mtrie_lookup_step_one (mtrie1, &ip1->src_address);
169 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
170 &ip1->src_address, 1);
172 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
173 &ip1->src_address, 2);
175 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
176 &ip1->src_address, 3);
178 lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1);
180 == ip4_fib_table_lookup_lb (ip4_fib_get(c1->fib_index),
182 lb1 = load_balance_get (lb_index1);
183 dpo1 = load_balance_get_bucket_i(lb1, 0);
185 vlib_increment_combined_counter
186 (vcm, cpu_index, lb_index0, 1,
187 vlib_buffer_length_in_chain (vm, b0)
188 + sizeof(ethernet_header_t));
190 vlib_increment_combined_counter
191 (vcm, cpu_index, lb_index1, 1,
192 vlib_buffer_length_in_chain (vm, b1)
193 + sizeof(ethernet_header_t));
196 if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
198 b1->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
202 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
203 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
205 ip4_cop_whitelist_trace_t *t =
206 vlib_add_trace (vm, node, b0, sizeof (*t));
207 t->sw_if_index = sw_if_index0;
208 t->next_index = next0;
211 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
212 && (b1->flags & VLIB_BUFFER_IS_TRACED)))
214 ip4_cop_whitelist_trace_t *t =
215 vlib_add_trace (vm, node, b1, sizeof (*t));
216 t->sw_if_index = sw_if_index1;
217 t->next_index = next1;
220 /* verify speculative enqueues, maybe switch current next frame */
221 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
222 to_next, n_left_to_next,
223 bi0, bi1, next0, next1);
226 while (n_left_from > 0 && n_left_to_next > 0)
233 cop_config_main_t *ccm0;
234 cop_config_data_t *c0;
235 ip4_fib_mtrie_t * mtrie0;
236 ip4_fib_mtrie_leaf_t leaf0;
238 const load_balance_t * lb0;
239 const dpo_id_t *dpo0;
241 /* speculatively enqueue b0 to the current next frame */
249 b0 = vlib_get_buffer (vm, bi0);
250 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
252 ip0 = vlib_buffer_get_current (b0);
254 ccm0 = cm->cop_config_mains + VNET_COP_IP4;
256 c0 = vnet_get_config_data
258 &vnet_buffer (b0)->cop.current_config_index,
262 mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
264 leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
266 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
267 &ip0->src_address, 1);
269 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
270 &ip0->src_address, 2);
272 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
273 &ip0->src_address, 3);
275 lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
278 == ip4_fib_table_lookup_lb (ip4_fib_get(c0->fib_index),
281 lb0 = load_balance_get (lb_index0);
282 dpo0 = load_balance_get_bucket_i(lb0, 0);
284 vlib_increment_combined_counter
285 (vcm, cpu_index, lb_index0, 1,
286 vlib_buffer_length_in_chain (vm, b0)
287 + sizeof(ethernet_header_t));
289 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
291 b0->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
295 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
296 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
298 ip4_cop_whitelist_trace_t *t =
299 vlib_add_trace (vm, node, b0, sizeof (*t));
300 t->sw_if_index = sw_if_index0;
301 t->next_index = next0;
304 /* verify speculative enqueue, maybe switch current next frame */
305 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
306 to_next, n_left_to_next,
310 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
312 return frame->n_vectors;
315 VLIB_REGISTER_NODE (ip4_cop_whitelist_node) = {
316 .function = ip4_cop_whitelist_node_fn,
317 .name = "ip4-cop-whitelist",
318 .vector_size = sizeof (u32),
319 .format_trace = format_ip4_cop_whitelist_trace,
320 .type = VLIB_NODE_TYPE_INTERNAL,
322 .n_errors = ARRAY_LEN(ip4_cop_whitelist_error_strings),
323 .error_strings = ip4_cop_whitelist_error_strings,
325 .n_next_nodes = COP_RX_N_FEATURES,
327 /* edit / add dispositions here */
329 [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist",
330 [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist",
331 [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist",
332 [IP4_RX_COP_INPUT] = "ip4-input",
333 [IP6_RX_COP_INPUT] = "ip6-input",
334 [DEFAULT_RX_COP_INPUT] = "ethernet-input",
335 [RX_COP_DROP] = "error-drop",
339 VLIB_NODE_FUNCTION_MULTIARCH (ip4_cop_whitelist_node, ip4_cop_whitelist_node_fn)
341 static clib_error_t *
342 ip4_whitelist_init (vlib_main_t * vm)
347 VLIB_INIT_FUNCTION (ip4_whitelist_init);