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Vector Packet Processing
ip6_whitelist.c
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1 /*
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>
16 #include <vnet/fib/ip6_fib.h>
17 #include <vnet/dpo/load_balance.h>
18 
19 typedef struct {
23 
24 /* packet trace format function */
25 static 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 *);
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 
36 #define foreach_ip6_cop_whitelist_error \
37 _(DROPPED, "ip6 cop whitelist packets dropped")
38 
39 typedef enum {
40 #define _(sym,str) IP6_COP_WHITELIST_ERROR_##sym,
42 #undef _
45 
47 #define _(sym,string) string,
49 #undef _
50 };
51 
53  vlib_node_runtime_t * node,
54  vlib_frame_t * frame)
55 {
56  u32 n_left_from, * from, * to_next;
57  cop_feature_type_t next_index;
60  u32 thread_index = vm->thread_index;
61 
62  from = vlib_frame_vector_args (frame);
63  n_left_from = frame->n_vectors;
64  next_index = node->cached_next_index;
65 
66  while (n_left_from > 0)
67  {
68  u32 n_left_to_next;
69 
70  vlib_get_next_frame (vm, node, next_index,
71  to_next, n_left_to_next);
72 
73  while (n_left_from >= 4 && n_left_to_next >= 2)
74  {
75  u32 bi0, bi1;
76  vlib_buffer_t * b0, * b1;
77  u32 next0, next1;
78  u32 sw_if_index0, sw_if_index1;
79  ip6_header_t * ip0, * ip1;
80  cop_config_main_t * ccm0, * ccm1;
81  cop_config_data_t * c0, * c1;
82  u32 lb_index0, lb_index1;
83  const load_balance_t * lb0, *lb1;
84  const dpo_id_t *dpo0, *dpo1;
85 
86  /* Prefetch next iteration. */
87  {
88  vlib_buffer_t * p2, * p3;
89 
90  p2 = vlib_get_buffer (vm, from[2]);
91  p3 = vlib_get_buffer (vm, from[3]);
92 
93  vlib_prefetch_buffer_header (p2, LOAD);
94  vlib_prefetch_buffer_header (p3, LOAD);
95 
98  }
99 
100  /* speculatively enqueue b0 and b1 to the current next frame */
101  to_next[0] = bi0 = from[0];
102  to_next[1] = bi1 = from[1];
103  from += 2;
104  to_next += 2;
105  n_left_from -= 2;
106  n_left_to_next -= 2;
107 
108  b0 = vlib_get_buffer (vm, bi0);
109  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
110 
111  ip0 = vlib_buffer_get_current (b0);
112 
113  ccm0 = cm->cop_config_mains + VNET_COP_IP6;
114 
116  (&ccm0->config_main,
117  &vnet_buffer (b0)->cop.current_config_index,
118  &next0,
119  sizeof (c0[0]));
120 
121  lb_index0 = ip6_fib_table_fwding_lookup (c0->fib_index,
122  &ip0->src_address);
123  lb0 = load_balance_get (lb_index0);
124  dpo0 = load_balance_get_bucket_i(lb0, 0);
125 
126  if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
127  {
128  b0->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
129  next0 = RX_COP_DROP;
130  }
131 
132  b1 = vlib_get_buffer (vm, bi1);
133  sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
134 
135  ip1 = vlib_buffer_get_current (b1);
136 
137  ccm1 = cm->cop_config_mains + VNET_COP_IP6;
138 
140  (&ccm1->config_main,
141  &vnet_buffer (b1)->cop.current_config_index,
142  &next1,
143  sizeof (c1[0]));
144 
145  lb_index1 = ip6_fib_table_fwding_lookup (c1->fib_index,
146  &ip1->src_address);
147 
148  lb1 = load_balance_get (lb_index1);
149  dpo1 = load_balance_get_bucket_i(lb1, 0);
150 
152  (vcm, thread_index, lb_index0, 1,
154  + sizeof(ethernet_header_t));
155 
157  (vcm, thread_index, lb_index1, 1,
159  + sizeof(ethernet_header_t));
160 
161  if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
162  {
163  b1->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
164  next1 = RX_COP_DROP;
165  }
166 
167  if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
168  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
169  {
171  vlib_add_trace (vm, node, b0, sizeof (*t));
172  t->sw_if_index = sw_if_index0;
173  t->next_index = next0;
174  }
175 
176  if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
177  && (b1->flags & VLIB_BUFFER_IS_TRACED)))
178  {
180  vlib_add_trace (vm, node, b1, sizeof (*t));
181  t->sw_if_index = sw_if_index1;
182  t->next_index = next1;
183  }
184 
185  /* verify speculative enqueues, maybe switch current next frame */
186  vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
187  to_next, n_left_to_next,
188  bi0, bi1, next0, next1);
189  }
190 
191  while (n_left_from > 0 && n_left_to_next > 0)
192  {
193  u32 bi0;
194  vlib_buffer_t * b0;
195  u32 next0;
196  u32 sw_if_index0;
197  ip6_header_t * ip0;
198  cop_config_main_t *ccm0;
199  cop_config_data_t *c0;
200  u32 lb_index0;
201  const load_balance_t * lb0;
202  const dpo_id_t *dpo0;
203 
204  /* speculatively enqueue b0 to the current next frame */
205  bi0 = from[0];
206  to_next[0] = bi0;
207  from += 1;
208  to_next += 1;
209  n_left_from -= 1;
210  n_left_to_next -= 1;
211 
212  b0 = vlib_get_buffer (vm, bi0);
213  sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
214 
215  ip0 = vlib_buffer_get_current (b0);
216 
217  ccm0 = cm->cop_config_mains + VNET_COP_IP6;
218 
220  (&ccm0->config_main,
221  &vnet_buffer (b0)->cop.current_config_index,
222  &next0,
223  sizeof (c0[0]));
224 
225  lb_index0 = ip6_fib_table_fwding_lookup (c0->fib_index,
226  &ip0->src_address);
227 
228  lb0 = load_balance_get (lb_index0);
229  dpo0 = load_balance_get_bucket_i(lb0, 0);
230 
232  (vcm, thread_index, lb_index0, 1,
234  + sizeof(ethernet_header_t));
235 
236  if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
237  {
238  b0->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
239  next0 = RX_COP_DROP;
240  }
241 
242  if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
243  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
244  {
246  vlib_add_trace (vm, node, b0, sizeof (*t));
247  t->sw_if_index = sw_if_index0;
248  t->next_index = next0;
249  }
250 
251  /* verify speculative enqueue, maybe switch current next frame */
252  vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
253  to_next, n_left_to_next,
254  bi0, next0);
255  }
256 
257  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
258  }
259  return frame->n_vectors;
260 }
261 
263  .name = "ip6-cop-whitelist",
264  .vector_size = sizeof (u32),
265  .format_trace = format_ip6_cop_whitelist_trace,
267 
269  .error_strings = ip6_cop_whitelist_error_strings,
270 
271  .n_next_nodes = COP_RX_N_FEATURES,
272 
273  /* edit / add dispositions here */
274  .next_nodes = {
275  [IP4_RX_COP_WHITELIST] = "ip4-cop-whitelist",
276  [IP6_RX_COP_WHITELIST] = "ip6-cop-whitelist",
277  [DEFAULT_RX_COP_WHITELIST] = "default-cop-whitelist",
278  [IP4_RX_COP_INPUT] = "ip4-input",
279  [IP6_RX_COP_INPUT] = "ip6-input",
280  [DEFAULT_RX_COP_INPUT] = "ethernet-input",
281  [RX_COP_DROP] = "error-drop",
282  },
283 };
284 
285 static clib_error_t *
287 {
288  return 0;
289 }
290 
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:124
#define CLIB_UNUSED(x)
Definition: clib.h:83
static u32 ip6_fib_table_fwding_lookup(u32 fib_index, const ip6_address_t *dst)
Definition: ip6_fib.h:67
static void vlib_increment_combined_counter(vlib_combined_counter_main_t *cm, u32 thread_index, u32 index, u64 n_packets, u64 n_bytes)
Increment a combined counter.
Definition: counter.h:220
cop_config_main_t cop_config_mains[VNET_N_COPS]
Definition: cop.h:66
u32 thread_index
Definition: main.h:218
vlib_node_registration_t ip6_cop_whitelist_node
(constructor) VLIB_REGISTER_NODE (ip6_cop_whitelist_node)
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
#define VLIB_NODE_FN(node)
Definition: node.h:202
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:366
ip6_address_t src_address
Definition: ip6_packet.h:383
unsigned char u8
Definition: types.h:56
ip6_cop_whitelist_error_t
Definition: ip6_whitelist.c:39
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:173
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
unsigned int u32
Definition: types.h:88
static clib_error_t * ip6_whitelist_init(vlib_main_t *vm)
vl_api_fib_path_type_t type
Definition: fib_types.api:123
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:170
vnet_crypto_main_t * cm
Definition: quic_crypto.c:41
static char * ip6_cop_whitelist_error_strings[]
Definition: ip6_whitelist.c:46
dpo_type_t dpoi_type
the type
Definition: dpo.h:174
static const dpo_id_t * load_balance_get_bucket_i(const load_balance_t *lb, u32 bucket)
Definition: load_balance.h:229
cop_feature_type_t
Definition: cop.h:39
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
static void * vnet_get_config_data(vnet_config_main_t *cm, u32 *config_index, u32 *next_index, u32 n_data_bytes)
Definition: config.h:122
The FIB DPO provieds;.
Definition: load_balance.h:106
#define PREDICT_FALSE(x)
Definition: clib.h:112
#define foreach_ip6_cop_whitelist_error
Definition: ip6_whitelist.c:36
load_balance_main_t load_balance_main
The one instance of load-balance main.
Definition: load_balance.c:56
#define vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1)
Finish enqueueing two buffers forward in the graph.
Definition: buffer_node.h:70
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:338
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
vlib_main_t * vm
Definition: buffer.c:323
u8 data[]
Packet data.
Definition: buffer.h:181
#define ARRAY_LEN(x)
Definition: clib.h:63
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:456
cop_main_t cop_main
Definition: cop.c:17
vlib_combined_counter_main_t lbm_via_counters
Definition: load_balance.h:47
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:220
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:55
VLIB buffer representation.
Definition: buffer.h:102
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
A collection of combined counters.
Definition: counter.h:188
#define vnet_buffer(b)
Definition: buffer.h:365
static u8 * format_ip6_cop_whitelist_trace(u8 *s, va_list *args)
Definition: ip6_whitelist.c:25
Definition: cop.h:65
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:302
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
u32 fib_index
Definition: cop.h:62
Definition: defs.h:46
vnet_config_main_t config_main
Definition: cop.h:57