blob: c2e16ccfe5409ab388606a68fd14259c0c53764e [file] [log] [blame]
Dave Barachc07bf5d2016-02-17 17:52:26 -05001/*
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:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
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.
14 */
15#include <vnet/cop/cop.h>
Neale Ranns0bfe5d82016-08-25 15:29:12 +010016#include <vnet/fib/ip6_fib.h>
17#include <vnet/dpo/load_balance.h>
Dave Barachc07bf5d2016-02-17 17:52:26 -050018
19typedef struct {
20 u32 next_index;
21 u32 sw_if_index;
22} ip6_cop_whitelist_trace_t;
23
24/* packet trace format function */
25static u8 * format_ip6_cop_whitelist_trace (u8 * s, va_list * args)
26{
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 ip6_cop_whitelist_trace_t * t = va_arg (*args, ip6_cop_whitelist_trace_t *);
30
31 s = format (s, "IP6_COP_WHITELIST: sw_if_index %d, next index %d",
32 t->sw_if_index, t->next_index);
33 return s;
34}
35
36vlib_node_registration_t ip6_cop_whitelist_node;
37
38#define foreach_ip6_cop_whitelist_error \
39_(DROPPED, "ip6 cop whitelist packets dropped")
40
41typedef enum {
42#define _(sym,str) IP6_COP_WHITELIST_ERROR_##sym,
43 foreach_ip6_cop_whitelist_error
44#undef _
45 IP6_COP_WHITELIST_N_ERROR,
46} ip6_cop_whitelist_error_t;
47
48static char * ip6_cop_whitelist_error_strings[] = {
49#define _(sym,string) string,
50 foreach_ip6_cop_whitelist_error
51#undef _
52};
53
54static uword
55ip6_cop_whitelist_node_fn (vlib_main_t * vm,
56 vlib_node_runtime_t * node,
57 vlib_frame_t * frame)
58{
59 u32 n_left_from, * from, * to_next;
60 cop_feature_type_t next_index;
61 cop_main_t *cm = &cop_main;
62 ip6_main_t * im6 = &ip6_main;
Neale Ranns0bfe5d82016-08-25 15:29:12 +010063 vlib_combined_counter_main_t * vcm = &load_balance_main.lbm_via_counters;
Dave Barachc07bf5d2016-02-17 17:52:26 -050064 u32 cpu_index = vm->cpu_index;
65
66 from = vlib_frame_vector_args (frame);
67 n_left_from = frame->n_vectors;
68 next_index = node->cached_next_index;
69
70 while (n_left_from > 0)
71 {
72 u32 n_left_to_next;
73
74 vlib_get_next_frame (vm, node, next_index,
75 to_next, n_left_to_next);
76
77 while (n_left_from >= 4 && n_left_to_next >= 2)
78 {
79 u32 bi0, bi1;
80 vlib_buffer_t * b0, * b1;
81 u32 next0, next1;
82 u32 sw_if_index0, sw_if_index1;
83 ip6_header_t * ip0, * ip1;
84 cop_config_main_t * ccm0, * ccm1;
85 cop_config_data_t * c0, * c1;
Neale Ranns0bfe5d82016-08-25 15:29:12 +010086 u32 lb_index0, lb_index1;
87 const load_balance_t * lb0, *lb1;
88 const dpo_id_t *dpo0, *dpo1;
89
Dave Barachc07bf5d2016-02-17 17:52:26 -050090 /* Prefetch next iteration. */
91 {
92 vlib_buffer_t * p2, * p3;
93
94 p2 = vlib_get_buffer (vm, from[2]);
95 p3 = vlib_get_buffer (vm, from[3]);
96
97 vlib_prefetch_buffer_header (p2, LOAD);
98 vlib_prefetch_buffer_header (p3, LOAD);
99
100 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
101 CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
102 }
103
104 /* speculatively enqueue b0 and b1 to the current next frame */
105 to_next[0] = bi0 = from[0];
106 to_next[1] = bi1 = from[1];
107 from += 2;
108 to_next += 2;
109 n_left_from -= 2;
110 n_left_to_next -= 2;
111
112 b0 = vlib_get_buffer (vm, bi0);
113 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
114
115 ip0 = vlib_buffer_get_current (b0);
116
117 ccm0 = cm->cop_config_mains + VNET_COP_IP6;
118
119 c0 = vnet_get_config_data
120 (&ccm0->config_main,
121 &vnet_buffer (b0)->cop.current_config_index,
122 &next0,
123 sizeof (c0[0]));
124
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100125 lb_index0 = ip6_fib_table_fwding_lookup (im6, c0->fib_index,
126 &ip0->src_address);
127 lb0 = load_balance_get (lb_index0);
128 dpo0 = load_balance_get_bucket_i(lb0, 0);
129
130 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
Dave Barachc07bf5d2016-02-17 17:52:26 -0500131 {
132 b0->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
133 next0 = RX_COP_DROP;
134 }
135
136 b1 = vlib_get_buffer (vm, bi1);
137 sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
138
139 ip1 = vlib_buffer_get_current (b1);
140
141 ccm1 = cm->cop_config_mains + VNET_COP_IP6;
142
143 c1 = vnet_get_config_data
144 (&ccm1->config_main,
145 &vnet_buffer (b1)->cop.current_config_index,
146 &next1,
147 sizeof (c1[0]));
148
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100149 lb_index1 = ip6_fib_table_fwding_lookup (im6, c1->fib_index,
150 &ip1->src_address);
Dave Barachc07bf5d2016-02-17 17:52:26 -0500151
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100152 lb1 = load_balance_get (lb_index1);
153 dpo1 = load_balance_get_bucket_i(lb1, 0);
Dave Barachc07bf5d2016-02-17 17:52:26 -0500154
155 vlib_increment_combined_counter
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100156 (vcm, cpu_index, lb_index0, 1,
Dave Barachc07bf5d2016-02-17 17:52:26 -0500157 vlib_buffer_length_in_chain (vm, b0)
158 + sizeof(ethernet_header_t));
159
160 vlib_increment_combined_counter
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100161 (vcm, cpu_index, lb_index1, 1,
Dave Barachc07bf5d2016-02-17 17:52:26 -0500162 vlib_buffer_length_in_chain (vm, b1)
163 + sizeof(ethernet_header_t));
164
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100165 if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
Dave Barachc07bf5d2016-02-17 17:52:26 -0500166 {
167 b1->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
168 next1 = RX_COP_DROP;
169 }
170
171 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
172 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
173 {
174 ip6_cop_whitelist_trace_t *t =
175 vlib_add_trace (vm, node, b0, sizeof (*t));
176 t->sw_if_index = sw_if_index0;
177 t->next_index = next0;
178 }
179
180 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
181 && (b1->flags & VLIB_BUFFER_IS_TRACED)))
182 {
183 ip6_cop_whitelist_trace_t *t =
184 vlib_add_trace (vm, node, b1, sizeof (*t));
185 t->sw_if_index = sw_if_index1;
186 t->next_index = next1;
187 }
188
189 /* verify speculative enqueues, maybe switch current next frame */
190 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
191 to_next, n_left_to_next,
192 bi0, bi1, next0, next1);
193 }
194
195 while (n_left_from > 0 && n_left_to_next > 0)
196 {
197 u32 bi0;
198 vlib_buffer_t * b0;
199 u32 next0;
200 u32 sw_if_index0;
201 ip6_header_t * ip0;
202 cop_config_main_t *ccm0;
203 cop_config_data_t *c0;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100204 u32 lb_index0;
205 const load_balance_t * lb0;
206 const dpo_id_t *dpo0;
Dave Barachc07bf5d2016-02-17 17:52:26 -0500207
208 /* speculatively enqueue b0 to the current next frame */
209 bi0 = from[0];
210 to_next[0] = bi0;
211 from += 1;
212 to_next += 1;
213 n_left_from -= 1;
214 n_left_to_next -= 1;
215
216 b0 = vlib_get_buffer (vm, bi0);
217 sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
218
219 ip0 = vlib_buffer_get_current (b0);
220
221 ccm0 = cm->cop_config_mains + VNET_COP_IP6;
222
223 c0 = vnet_get_config_data
224 (&ccm0->config_main,
225 &vnet_buffer (b0)->cop.current_config_index,
226 &next0,
227 sizeof (c0[0]));
228
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100229 lb_index0 = ip6_fib_table_fwding_lookup (im6, c0->fib_index,
230 &ip0->src_address);
Dave Barachc07bf5d2016-02-17 17:52:26 -0500231
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100232 lb0 = load_balance_get (lb_index0);
233 dpo0 = load_balance_get_bucket_i(lb0, 0);
Dave Barachc07bf5d2016-02-17 17:52:26 -0500234
235 vlib_increment_combined_counter
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100236 (vcm, cpu_index, lb_index0, 1,
Dave Barachc07bf5d2016-02-17 17:52:26 -0500237 vlib_buffer_length_in_chain (vm, b0)
238 + sizeof(ethernet_header_t));
239
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100240 if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
Dave Barachc07bf5d2016-02-17 17:52:26 -0500241 {
242 b0->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
243 next0 = RX_COP_DROP;
244 }
245
246 if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
247 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
248 {
249 ip6_cop_whitelist_trace_t *t =
250 vlib_add_trace (vm, node, b0, sizeof (*t));
251 t->sw_if_index = sw_if_index0;
252 t->next_index = next0;
253 }
254
255 /* verify speculative enqueue, maybe switch current next frame */
256 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
257 to_next, n_left_to_next,
258 bi0, next0);
259 }
260
261 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
262 }
263 return frame->n_vectors;
264}
265
266VLIB_REGISTER_NODE (ip6_cop_whitelist_node) = {
267 .function = ip6_cop_whitelist_node_fn,
268 .name = "ip6-cop-whitelist",
269 .vector_size = sizeof (u32),
270 .format_trace = format_ip6_cop_whitelist_trace,
271 .type = VLIB_NODE_TYPE_INTERNAL,
272
273 .n_errors = ARRAY_LEN(ip6_cop_whitelist_error_strings),
274 .error_strings = ip6_cop_whitelist_error_strings,
275
276 .n_next_nodes = COP_RX_N_FEATURES,
277
278 /* edit / add dispositions here */
279 .next_nodes = {
280 [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist",
281 [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist",
282 [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist",
283 [IP4_RX_COP_INPUT] = "ip4-input",
284 [IP6_RX_COP_INPUT] = "ip6-input",
285 [DEFAULT_RX_COP_INPUT] = "ethernet-input",
286 [RX_COP_DROP] = "error-drop",
287 },
288};
289
Damjan Marion1c80e832016-05-11 23:07:18 +0200290VLIB_NODE_FUNCTION_MULTIARCH (ip6_cop_whitelist_node, ip6_cop_whitelist_node_fn)
291
Dave Barachc07bf5d2016-02-17 17:52:26 -0500292static clib_error_t *
293ip6_whitelist_init (vlib_main_t * vm)
294{
295 return 0;
296}
297
298VLIB_INIT_FUNCTION (ip6_whitelist_init);