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 #define foreach_ip4_cop_whitelist_error \
37 _(DROPPED, "ip4 cop whitelist packets dropped")
40 #define _(sym,str) IP4_COP_WHITELIST_ERROR_##sym,
41 foreach_ip4_cop_whitelist_error
43 IP4_COP_WHITELIST_N_ERROR,
44 } ip4_cop_whitelist_error_t;
46 static char * ip4_cop_whitelist_error_strings[] = {
47 #define _(sym,string) string,
48 foreach_ip4_cop_whitelist_error
52 VLIB_NODE_FN (ip4_cop_whitelist_node) (vlib_main_t * vm,
53 vlib_node_runtime_t * node,
56 u32 n_left_from, * from, * to_next;
57 cop_feature_type_t next_index;
58 cop_main_t *cm = &cop_main;
59 vlib_combined_counter_main_t * vcm = &load_balance_main.lbm_via_counters;
60 u32 thread_index = vm->thread_index;
62 from = vlib_frame_vector_args (frame);
63 n_left_from = frame->n_vectors;
64 next_index = node->cached_next_index;
66 while (n_left_from > 0)
70 vlib_get_next_frame (vm, node, next_index,
71 to_next, n_left_to_next);
73 while (n_left_from >= 4 && n_left_to_next >= 2)
76 vlib_buffer_t * b0, * b1;
78 u32 sw_if_index0, sw_if_index1;
79 ip4_header_t * ip0, * ip1;
80 cop_config_main_t * ccm0, * ccm1;
81 cop_config_data_t * c0, * c1;
82 ip4_fib_mtrie_t * mtrie0, * mtrie1;
83 ip4_fib_mtrie_leaf_t leaf0, leaf1;
84 u32 lb_index0, lb_index1;
85 const load_balance_t * lb0, *lb1;
86 const dpo_id_t *dpo0, *dpo1;
88 /* Prefetch next iteration. */
90 vlib_buffer_t * p2, * p3;
92 p2 = vlib_get_buffer (vm, from[2]);
93 p3 = vlib_get_buffer (vm, from[3]);
95 vlib_prefetch_buffer_header (p2, LOAD);
96 vlib_prefetch_buffer_header (p3, LOAD);
98 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
99 CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
102 /* speculatively enqueue b0 and b1 to the current next frame */
103 to_next[0] = bi0 = from[0];
104 to_next[1] = bi1 = from[1];
110 b0 = vlib_get_buffer (vm, bi0);
111 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
113 ip0 = vlib_buffer_get_current (b0);
115 ccm0 = cm->cop_config_mains + VNET_COP_IP4;
117 c0 = vnet_get_config_data
119 &vnet_buffer (b0)->cop.current_config_index,
123 mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
125 leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
127 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
128 &ip0->src_address, 2);
130 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
131 &ip0->src_address, 3);
133 lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
136 == ip4_fib_table_lookup_lb (ip4_fib_get(c0->fib_index),
138 lb0 = load_balance_get (lb_index0);
139 dpo0 = load_balance_get_bucket_i(lb0, 0);
141 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
143 b0->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
147 b1 = vlib_get_buffer (vm, bi1);
148 sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
150 ip1 = vlib_buffer_get_current (b1);
152 ccm1 = cm->cop_config_mains + VNET_COP_IP4;
154 c1 = vnet_get_config_data
156 &vnet_buffer (b1)->cop.current_config_index,
159 mtrie1 = &ip4_fib_get (c1->fib_index)->mtrie;
161 leaf1 = ip4_fib_mtrie_lookup_step_one (mtrie1, &ip1->src_address);
163 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
164 &ip1->src_address, 2);
166 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
167 &ip1->src_address, 3);
169 lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1);
171 == ip4_fib_table_lookup_lb (ip4_fib_get(c1->fib_index),
173 lb1 = load_balance_get (lb_index1);
174 dpo1 = load_balance_get_bucket_i(lb1, 0);
176 vlib_increment_combined_counter
177 (vcm, thread_index, lb_index0, 1,
178 vlib_buffer_length_in_chain (vm, b0)
179 + sizeof(ethernet_header_t));
181 vlib_increment_combined_counter
182 (vcm, thread_index, lb_index1, 1,
183 vlib_buffer_length_in_chain (vm, b1)
184 + sizeof(ethernet_header_t));
187 if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
189 b1->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
193 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
194 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
196 ip4_cop_whitelist_trace_t *t =
197 vlib_add_trace (vm, node, b0, sizeof (*t));
198 t->sw_if_index = sw_if_index0;
199 t->next_index = next0;
202 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
203 && (b1->flags & VLIB_BUFFER_IS_TRACED)))
205 ip4_cop_whitelist_trace_t *t =
206 vlib_add_trace (vm, node, b1, sizeof (*t));
207 t->sw_if_index = sw_if_index1;
208 t->next_index = next1;
211 /* verify speculative enqueues, maybe switch current next frame */
212 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
213 to_next, n_left_to_next,
214 bi0, bi1, next0, next1);
217 while (n_left_from > 0 && n_left_to_next > 0)
224 cop_config_main_t *ccm0;
225 cop_config_data_t *c0;
226 ip4_fib_mtrie_t * mtrie0;
227 ip4_fib_mtrie_leaf_t leaf0;
229 const load_balance_t * lb0;
230 const dpo_id_t *dpo0;
232 /* speculatively enqueue b0 to the current next frame */
240 b0 = vlib_get_buffer (vm, bi0);
241 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
243 ip0 = vlib_buffer_get_current (b0);
245 ccm0 = cm->cop_config_mains + VNET_COP_IP4;
247 c0 = vnet_get_config_data
249 &vnet_buffer (b0)->cop.current_config_index,
253 mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
255 leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
257 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
258 &ip0->src_address, 2);
260 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
261 &ip0->src_address, 3);
263 lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
266 == ip4_fib_table_lookup_lb (ip4_fib_get(c0->fib_index),
269 lb0 = load_balance_get (lb_index0);
270 dpo0 = load_balance_get_bucket_i(lb0, 0);
272 vlib_increment_combined_counter
273 (vcm, thread_index, lb_index0, 1,
274 vlib_buffer_length_in_chain (vm, b0)
275 + sizeof(ethernet_header_t));
277 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
279 b0->error = node->errors[IP4_COP_WHITELIST_ERROR_DROPPED];
283 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
284 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
286 ip4_cop_whitelist_trace_t *t =
287 vlib_add_trace (vm, node, b0, sizeof (*t));
288 t->sw_if_index = sw_if_index0;
289 t->next_index = next0;
292 /* verify speculative enqueue, maybe switch current next frame */
293 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
294 to_next, n_left_to_next,
298 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
300 return frame->n_vectors;
303 VLIB_REGISTER_NODE (ip4_cop_whitelist_node) = {
304 .name = "ip4-cop-whitelist",
305 .vector_size = sizeof (u32),
306 .format_trace = format_ip4_cop_whitelist_trace,
307 .type = VLIB_NODE_TYPE_INTERNAL,
309 .n_errors = ARRAY_LEN(ip4_cop_whitelist_error_strings),
310 .error_strings = ip4_cop_whitelist_error_strings,
312 .n_next_nodes = COP_RX_N_FEATURES,
314 /* edit / add dispositions here */
316 [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist",
317 [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist",
318 [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist",
319 [IP4_RX_COP_INPUT] = "ip4-input",
320 [IP6_RX_COP_INPUT] = "ip6-input",
321 [DEFAULT_RX_COP_INPUT] = "ethernet-input",
322 [RX_COP_DROP] = "error-drop",
326 static clib_error_t *
327 ip4_whitelist_init (vlib_main_t * vm)
332 VLIB_INIT_FUNCTION (ip4_whitelist_init);