2 * Copyright (c) 2016,2020 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 <plugins/adl/adl.h>
16 #include <vnet/fib/ip4_fib.h>
17 #include <vnet/dpo/load_balance.h>
22 } ip4_adl_allowlist_trace_t;
24 /* packet trace format function */
25 static u8 * format_ip4_adl_allowlist_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_adl_allowlist_trace_t * t = va_arg (*args, ip4_adl_allowlist_trace_t *);
31 s = format (s, "IP4_ADL_ALLOWLIST: sw_if_index %d, next index %d",
32 t->sw_if_index, t->next_index);
36 #define foreach_ip4_adl_allowlist_error \
37 _(ALLOWED, "ip4 allowlist allowed") \
38 _(DROPPED, "ip4 allowlist dropped")
41 #define _(sym,str) IP4_ADL_ALLOWLIST_ERROR_##sym,
42 foreach_ip4_adl_allowlist_error
44 IP4_ADL_ALLOWLIST_N_ERROR,
45 } ip4_adl_allowlist_error_t;
47 static char * ip4_adl_allowlist_error_strings[] = {
48 #define _(sym,string) string,
49 foreach_ip4_adl_allowlist_error
53 VLIB_NODE_FN (ip4_adl_allowlist_node) (vlib_main_t * vm,
54 vlib_node_runtime_t * node,
57 u32 n_left_from, * from, * to_next;
58 adl_feature_type_t next_index;
59 adl_main_t *cm = &adl_main;
60 vlib_combined_counter_main_t * vcm = &load_balance_main.lbm_via_counters;
61 u32 thread_index = vm->thread_index;
64 from = vlib_frame_vector_args (frame);
65 n_left_from = frame->n_vectors;
66 allowed_packets = n_left_from;
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 adl_config_main_t * ccm0, * ccm1;
84 adl_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->adl_config_mains + VNET_ADL_IP4;
120 c0 = vnet_get_config_data
122 &adl_buffer (b0)->adl.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_ADL_ALLOWLIST_ERROR_DROPPED];
151 b1 = vlib_get_buffer (vm, bi1);
152 sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
154 ip1 = vlib_buffer_get_current (b1);
156 ccm1 = cm->adl_config_mains + VNET_ADL_IP4;
158 c1 = vnet_get_config_data
160 &adl_buffer (b1)->adl.current_config_index,
163 mtrie1 = &ip4_fib_get (c1->fib_index)->mtrie;
165 leaf1 = ip4_fib_mtrie_lookup_step_one (mtrie1, &ip1->src_address);
167 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
168 &ip1->src_address, 2);
170 leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1,
171 &ip1->src_address, 3);
173 lb_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1);
175 == ip4_fib_table_lookup_lb (ip4_fib_get(c1->fib_index),
177 lb1 = load_balance_get (lb_index1);
178 dpo1 = load_balance_get_bucket_i(lb1, 0);
180 vlib_increment_combined_counter
181 (vcm, thread_index, lb_index0, 1,
182 vlib_buffer_length_in_chain (vm, b0)
183 + sizeof(ethernet_header_t));
185 vlib_increment_combined_counter
186 (vcm, thread_index, lb_index1, 1,
187 vlib_buffer_length_in_chain (vm, b1)
188 + sizeof(ethernet_header_t));
191 if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
193 b1->error = node->errors[IP4_ADL_ALLOWLIST_ERROR_DROPPED];
198 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
199 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
201 ip4_adl_allowlist_trace_t *t =
202 vlib_add_trace (vm, node, b0, sizeof (*t));
203 t->sw_if_index = sw_if_index0;
204 t->next_index = next0;
207 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
208 && (b1->flags & VLIB_BUFFER_IS_TRACED)))
210 ip4_adl_allowlist_trace_t *t =
211 vlib_add_trace (vm, node, b1, sizeof (*t));
212 t->sw_if_index = sw_if_index1;
213 t->next_index = next1;
216 /* verify speculative enqueues, maybe switch current next frame */
217 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
218 to_next, n_left_to_next,
219 bi0, bi1, next0, next1);
222 while (n_left_from > 0 && n_left_to_next > 0)
229 adl_config_main_t *ccm0;
230 adl_config_data_t *c0;
231 ip4_fib_mtrie_t * mtrie0;
232 ip4_fib_mtrie_leaf_t leaf0;
234 const load_balance_t * lb0;
235 const dpo_id_t *dpo0;
237 /* speculatively enqueue b0 to the current next frame */
245 b0 = vlib_get_buffer (vm, bi0);
246 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
248 ip0 = vlib_buffer_get_current (b0);
250 ccm0 = cm->adl_config_mains + VNET_ADL_IP4;
252 c0 = vnet_get_config_data
254 &adl_buffer (b0)->adl.current_config_index,
258 mtrie0 = &ip4_fib_get (c0->fib_index)->mtrie;
260 leaf0 = ip4_fib_mtrie_lookup_step_one (mtrie0, &ip0->src_address);
262 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
263 &ip0->src_address, 2);
265 leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0,
266 &ip0->src_address, 3);
268 lb_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0);
271 == ip4_fib_table_lookup_lb (ip4_fib_get(c0->fib_index),
274 lb0 = load_balance_get (lb_index0);
275 dpo0 = load_balance_get_bucket_i(lb0, 0);
277 vlib_increment_combined_counter
278 (vcm, thread_index, lb_index0, 1,
279 vlib_buffer_length_in_chain (vm, b0)
280 + sizeof(ethernet_header_t));
282 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
284 b0->error = node->errors[IP4_ADL_ALLOWLIST_ERROR_DROPPED];
289 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
290 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
292 ip4_adl_allowlist_trace_t *t =
293 vlib_add_trace (vm, node, b0, sizeof (*t));
294 t->sw_if_index = sw_if_index0;
295 t->next_index = next0;
298 /* verify speculative enqueue, maybe switch current next frame */
299 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
300 to_next, n_left_to_next,
304 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
307 vlib_node_increment_counter (vm, node->node_index,
308 IP4_ADL_ALLOWLIST_ERROR_ALLOWED,
311 return frame->n_vectors;
314 VLIB_REGISTER_NODE (ip4_adl_allowlist_node) = {
315 .name = "ip4-adl-allowlist",
316 .vector_size = sizeof (u32),
317 .format_trace = format_ip4_adl_allowlist_trace,
318 .type = VLIB_NODE_TYPE_INTERNAL,
320 .n_errors = ARRAY_LEN(ip4_adl_allowlist_error_strings),
321 .error_strings = ip4_adl_allowlist_error_strings,
323 .n_next_nodes = ADL_RX_N_FEATURES,
325 /* edit / add dispositions here */
327 [IP4_RX_ADL_ALLOWLIST] = "ip4-adl-allowlist",
328 [IP6_RX_ADL_ALLOWLIST] = "ip6-adl-allowlist",
329 [DEFAULT_RX_ADL_ALLOWLIST] = "default-adl-allowlist",
330 [IP4_RX_ADL_INPUT] = "ip4-input",
331 [IP6_RX_ADL_INPUT] = "ip6-input",
332 [DEFAULT_RX_ADL_INPUT] = "ethernet-input",
333 [RX_ADL_DROP] = "error-drop",
337 static clib_error_t *
338 ip4_allowlist_init (vlib_main_t * vm)
343 VLIB_INIT_FUNCTION (ip4_allowlist_init);