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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 
37 
38 #define foreach_ip6_cop_whitelist_error \
39 _(DROPPED, "ip6 cop whitelist packets dropped")
40 
41 typedef enum {
42 #define _(sym,str) IP6_COP_WHITELIST_ERROR_##sym,
44 #undef _
47 
49 #define _(sym,string) string,
51 #undef _
52 };
53 
54 static uword
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;
64  u32 thread_index = vm->thread_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;
86  u32 lb_index0, lb_index1;
87  const load_balance_t * lb0, *lb1;
88  const dpo_id_t *dpo0, *dpo1;
89 
90  /* 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 
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 
120  (&ccm0->config_main,
121  &vnet_buffer (b0)->cop.current_config_index,
122  &next0,
123  sizeof (c0[0]));
124 
125  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))
131  {
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 
144  (&ccm1->config_main,
145  &vnet_buffer (b1)->cop.current_config_index,
146  &next1,
147  sizeof (c1[0]));
148 
149  lb_index1 = ip6_fib_table_fwding_lookup (im6, c1->fib_index,
150  &ip1->src_address);
151 
152  lb1 = load_balance_get (lb_index1);
153  dpo1 = load_balance_get_bucket_i(lb1, 0);
154 
156  (vcm, thread_index, lb_index0, 1,
158  + sizeof(ethernet_header_t));
159 
161  (vcm, thread_index, lb_index1, 1,
163  + sizeof(ethernet_header_t));
164 
165  if (PREDICT_FALSE(dpo1->dpoi_type != DPO_RECEIVE))
166  {
167  b1->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
168  next1 = RX_COP_DROP;
169  }
170 
172  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
173  {
175  vlib_add_trace (vm, node, b0, sizeof (*t));
176  t->sw_if_index = sw_if_index0;
177  t->next_index = next0;
178  }
179 
181  && (b1->flags & VLIB_BUFFER_IS_TRACED)))
182  {
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;
204  u32 lb_index0;
205  const load_balance_t * lb0;
206  const dpo_id_t *dpo0;
207 
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 
224  (&ccm0->config_main,
225  &vnet_buffer (b0)->cop.current_config_index,
226  &next0,
227  sizeof (c0[0]));
228 
229  lb_index0 = ip6_fib_table_fwding_lookup (im6, c0->fib_index,
230  &ip0->src_address);
231 
232  lb0 = load_balance_get (lb_index0);
233  dpo0 = load_balance_get_bucket_i(lb0, 0);
234 
236  (vcm, thread_index, lb_index0, 1,
238  + sizeof(ethernet_header_t));
239 
240  if (PREDICT_FALSE(dpo0->dpoi_type != DPO_RECEIVE))
241  {
242  b0->error = node->errors[IP6_COP_WHITELIST_ERROR_DROPPED];
243  next0 = RX_COP_DROP;
244  }
245 
247  && (b0->flags & VLIB_BUFFER_IS_TRACED)))
248  {
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 
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 
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 
291 
292 static clib_error_t *
294 {
295  return 0;
296 }
297 
#define CLIB_UNUSED(x)
Definition: clib.h:79
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:213
cop_config_main_t cop_config_mains[VNET_N_COPS]
Definition: cop.h:66
u32 thread_index
Definition: main.h:179
vlib_node_registration_t ip6_cop_whitelist_node
(constructor) VLIB_REGISTER_NODE (ip6_cop_whitelist_node)
Definition: ip6_whitelist.c:36
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
static u32 ip6_fib_table_fwding_lookup(ip6_main_t *im, u32 fib_index, const ip6_address_t *dst)
Definition: ip6_fib.h:67
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:451
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:250
ip6_address_t src_address
Definition: ip6_packet.h:347
unsigned char u8
Definition: types.h:56
ip6_cop_whitelist_error_t
Definition: ip6_whitelist.c:41
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:156
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:184
unsigned int u32
Definition: types.h:88
static clib_error_t * ip6_whitelist_init(vlib_main_t *vm)
#define VLIB_NODE_FUNCTION_MULTIARCH(node, fn)
Definition: node.h:194
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:168
static char * ip6_cop_whitelist_error_strings[]
Definition: ip6_whitelist.c:48
dpo_type_t dpoi_type
the type
Definition: dpo.h:172
static const dpo_id_t * load_balance_get_bucket_i(const load_balance_t *lb, u32 bucket)
Definition: load_balance.h:209
static uword ip6_cop_whitelist_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: ip6_whitelist.c:55
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:202
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:84
#define PREDICT_FALSE(x)
Definition: clib.h:105
#define foreach_ip6_cop_whitelist_error
Definition: ip6_whitelist.c:38
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:364
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:135
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:153
u16 n_vectors
Definition: node.h:380
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:77
vlib_main_t * vm
Definition: buffer.c:294
#define ARRAY_LEN(x)
Definition: clib.h:59
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:454
cop_main_t cop_main
Definition: cop.c:17
vlib_combined_counter_main_t lbm_via_counters
Definition: load_balance.h:47
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:492
ip6_main_t ip6_main
Definition: ip6_forward.c:2574
static load_balance_t * load_balance_get(index_t lbi)
Definition: load_balance.h:200
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
struct _vlib_node_registration vlib_node_registration_t
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:267
A collection of combined counters.
Definition: counter.h:181
#define vnet_buffer(b)
Definition: buffer.h:360
static u8 * format_ip6_cop_whitelist_trace(u8 *s, va_list *args)
Definition: ip6_whitelist.c:25
u8 data[0]
Packet data.
Definition: buffer.h:172
u16 flags
Copy of main node flags.
Definition: node.h:486
Definition: cop.h:65
#define VLIB_NODE_FLAG_TRACE
Definition: node.h:295
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:62
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:111
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:57
u32 fib_index
Definition: cop.h:62
Definition: defs.h:46
vnet_config_main_t config_main
Definition: cop.h:57