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Vector Packet Processing
input_acl.c
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1 /*
2  * Copyright (c) 2015 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/ip/ip.h>
18 
20 
21 static int
23  input_acl_main_t *am,
24  u32 sw_if_index,
26  int feature_enable)
27 {
28 
29  if (tid == INPUT_ACL_TABLE_L2)
30  {
31  l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_ACL,
32  feature_enable);
33  }
34  else
35  { /* IP[46] */
37  u8 arc;
38 
39  if (tid == INPUT_ACL_TABLE_IP4)
40  {
41  vnet_feature_enable_disable ("ip4-unicast", "ip4-inacl",
42  sw_if_index, feature_enable, 0, 0);
43  arc = vnet_get_feature_arc_index ("ip4-unicast");
44  }
45  else
46  {
47  vnet_feature_enable_disable ("ip6-unicast", "ip6-inacl",
48  sw_if_index, feature_enable, 0, 0);
49  arc = vnet_get_feature_arc_index ("ip6-unicast");
50  }
51 
53  am->vnet_config_main[tid] = &fcm->config_main;
54  }
55 
56  return 0;
57 }
58 
60  u32 ip4_table_index,
61  u32 ip6_table_index,
62  u32 l2_table_index, u32 is_add)
63 {
66  u32 acl[INPUT_ACL_N_TABLES] = {ip4_table_index, ip6_table_index,
67  l2_table_index};
68  u32 ti;
69 
70  /* Assume that we've validated sw_if_index in the API layer */
71 
72  for (ti = 0; ti < INPUT_ACL_N_TABLES; ti++)
73  {
74  if (acl[ti] == ~0)
75  continue;
76 
77  if (pool_is_free_index (vcm->tables, acl[ti]))
78  return VNET_API_ERROR_NO_SUCH_TABLE;
79 
81  (am->classify_table_index_by_sw_if_index[ti], sw_if_index, ~0);
82 
83  /* Reject any DEL operation with wrong sw_if_index */
84  if (!is_add &&
85  (acl[ti] != am->classify_table_index_by_sw_if_index[ti][sw_if_index]))
86  {
87  clib_warning ("Non-existent intf_idx=%d with table_index=%d for delete",
88  sw_if_index, acl[ti]);
89  return VNET_API_ERROR_NO_SUCH_TABLE;
90  }
91 
92  /* Return ok on ADD operaton if feature is already enabled */
93  if (is_add &&
94  am->classify_table_index_by_sw_if_index[ti][sw_if_index] != ~0)
95  return 0;
96 
97  vnet_inacl_ip_feature_enable (vm, am, sw_if_index, ti, is_add);
98 
99  if (is_add)
100  am->classify_table_index_by_sw_if_index[ti][sw_if_index] = acl[ti];
101  else
102  am->classify_table_index_by_sw_if_index[ti][sw_if_index] = ~0;
103  }
104 
105  return 0;
106 }
107 
108 static clib_error_t *
110  unformat_input_t * input,
111  vlib_cli_command_t * cmd)
112 {
113  vnet_main_t * vnm = vnet_get_main();
114  u32 sw_if_index = ~0;
115  u32 ip4_table_index = ~0;
116  u32 ip6_table_index = ~0;
117  u32 l2_table_index = ~0;
118  u32 is_add = 1;
119  u32 idx_cnt = 0;
120  int rv;
121 
123  {
124  if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
125  vnm, &sw_if_index))
126  ;
127  else if (unformat (input, "ip4-table %d", &ip4_table_index))
128  idx_cnt++;
129  else if (unformat (input, "ip6-table %d", &ip6_table_index))
130  idx_cnt++;
131  else if (unformat (input, "l2-table %d", &l2_table_index))
132  idx_cnt++;
133  else if (unformat (input, "del"))
134  is_add = 0;
135  else
136  break;
137  }
138 
139  if (sw_if_index == ~0)
140  return clib_error_return (0, "Interface must be specified.");
141 
142  if (!idx_cnt)
143  return clib_error_return (0, "Table index should be specified.");
144 
145  if (idx_cnt > 1)
146  return clib_error_return (0, "Only one table index per API is allowed.");
147 
148  rv = vnet_set_input_acl_intfc (vm, sw_if_index, ip4_table_index,
149  ip6_table_index, l2_table_index, is_add);
150 
151  switch (rv)
152  {
153  case 0:
154  break;
155 
156  case VNET_API_ERROR_NO_MATCHING_INTERFACE:
157  return clib_error_return (0, "No such interface");
158 
159  case VNET_API_ERROR_NO_SUCH_ENTRY:
160  return clib_error_return (0, "No such classifier table");
161  }
162  return 0;
163 }
164 
165 /*
166  * Configure interface to enable/disble input ACL feature:
167  * intfc - interface name to be configured as input ACL
168  * Ip4-table <index> [del] - enable/disable IP4 input ACL
169  * Ip6-table <index> [del] - enable/disable IP6 input ACL
170  * l2-table <index> [del] - enable/disable Layer2 input ACL
171  *
172  * Note: Only one table index per API call is allowed.
173  *
174  */
175 VLIB_CLI_COMMAND (set_input_acl_command, static) = {
176  .path = "set interface input acl",
177  .short_help =
178  "set interface input acl intfc <int> [ip4-table <index>]\n"
179  " [ip6-table <index>] [l2-table <index>] [del]",
180  .function = set_input_acl_command_fn,
181 };
182 
184 {
186  clib_error_t * error = 0;
187 
188  if ((error = vlib_call_init_function (vm, ip_inacl_init)))
189  return error;
190 
191  am->vlib_main = vm;
192  am->vnet_main = vnet_get_main();
194 
195  return 0;
196 }
197 
199 
200 uword unformat_acl_type (unformat_input_t * input, va_list * args)
201 {
202  u32 * acl_type = va_arg (*args, u32 *);
203  u32 tid = INPUT_ACL_N_TABLES;
204 
205  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
206  if (unformat (input, "ip4"))
207  tid = INPUT_ACL_TABLE_IP4;
208  else if (unformat (input, "ip6"))
209  tid = INPUT_ACL_TABLE_IP6;
210  else if (unformat (input, "l2"))
211  tid = INPUT_ACL_TABLE_L2;
212  else
213  break;
214  }
215 
216  *acl_type = tid;
217  return 1;
218 }
219 
220 u8 * format_vnet_inacl_info (u8 * s, va_list * va)
221 {
222  input_acl_main_t * am = va_arg (*va, input_acl_main_t *);
223  int sw_if_idx = va_arg (*va, int);
224  u32 tid = va_arg (*va, u32);
225 
226  if (tid == ~0)
227  {
228  s = format (s, "%10s%20s\t\t%s", "Intfc idx", "Classify table",
229  "Interface name");
230  return s;
231  }
232 
233  s = format (s, "%10d%20d\t\t%U", sw_if_idx, tid,
234  format_vnet_sw_if_index_name, am->vnet_main, sw_if_idx);
235 
236  return s;
237 }
238 
239 static clib_error_t *
241  unformat_input_t * input,
242  vlib_cli_command_t * cmd)
243 {
245  u32 type = INPUT_ACL_N_TABLES;
246  int i;
247  u32 * vec_tbl;
248 
250  {
251  if (unformat (input, "type %U", unformat_acl_type, &type))
252  ;
253  else
254  break;
255  }
256 
257  if (type == INPUT_ACL_N_TABLES)
258  return clib_error_return (0, "Invalid input ACL table type.");
259 
260  vec_tbl = am->classify_table_index_by_sw_if_index[type];
261 
262  if (vec_len(vec_tbl))
263  vlib_cli_output (vm, "%U", format_vnet_inacl_info, am, ~0 /* hdr */, ~0);
264  else
265  vlib_cli_output (vm, "No input ACL tables configured");
266 
267  for (i = 0; i < vec_len (vec_tbl); i++)
268  {
269  if (vec_elt(vec_tbl, i) == ~0)
270  continue;
271 
273  am, i, vec_elt(vec_tbl, i));
274  }
275 
276  return 0;
277 }
278 
279 VLIB_CLI_COMMAND (show_inacl_command, static) = {
280  .path = "show inacl",
281  .short_help = "show inacl type [ip4|ip6|l2]",
282  .function = show_inacl_command_fn,
283 };
vnet_config_main_t config_main
Definition: feature.h:65
sll srl srl sll sra u16x4 i
Definition: vector_sse2.h:343
vnet_main_t * vnet_main
Definition: input_acl.h:42
u8 vnet_get_feature_arc_index(const char *s)
Definition: feature.c:123
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
u32 * classify_table_index_by_sw_if_index[INPUT_ACL_N_TABLES]
Definition: input_acl.h:38
static clib_error_t * set_input_acl_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: input_acl.c:109
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
unformat_function_t unformat_vnet_sw_interface
format_function_t format_vnet_sw_if_index_name
vnet_classify_main_t * vnet_classify_main
Definition: input_acl.h:43
u8 * format_vnet_inacl_info(u8 *s, va_list *va)
Definition: input_acl.c:220
static int vnet_inacl_ip_feature_enable(vlib_main_t *vnm, input_acl_main_t *am, u32 sw_if_index, input_acl_table_id_t tid, int feature_enable)
Definition: input_acl.c:22
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
#define clib_error_return(e, args...)
Definition: error.h:111
#define vlib_call_init_function(vm, x)
Definition: init.h:162
struct _unformat_input_t unformat_input_t
uword unformat_acl_type(unformat_input_t *input, va_list *args)
Definition: input_acl.c:200
vnet_config_main_t * vnet_config_main[INPUT_ACL_N_TABLES]
Definition: input_acl.h:44
vlib_main_t * vlib_main
Definition: input_acl.h:41
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
vlib_main_t * vm
Definition: buffer.c:276
#define clib_warning(format, args...)
Definition: error.h:59
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:238
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
struct _vnet_classify_main vnet_classify_main_t
Definition: vnet_classify.h:69
input_acl_main_t input_acl_main
Definition: input_acl.c:19
input_acl_table_id_t
Definition: input_acl.h:23
unsigned int u32
Definition: types.h:88
vnet_classify_main_t vnet_classify_main
Definition: vnet_classify.c:22
u64 uword
Definition: types.h:112
#define vec_elt(v, i)
Get vector value at index i.
u32 l2input_intf_bitmap_enable(u32 sw_if_index, u32 feature_bitmap, u32 enable)
Enable (or disable) the feature in the bitmap for the given interface.
Definition: l2_input.c:482
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
static clib_error_t * ip_inacl_init(vlib_main_t *vm)
Definition: ip_input_acl.c:436
static vnet_feature_config_main_t * vnet_get_feature_arc_config_main(u8 arc_index)
Definition: feature.h:149
static clib_error_t * show_inacl_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: input_acl.c:240
int vnet_set_input_acl_intfc(vlib_main_t *vm, u32 sw_if_index, u32 ip4_table_index, u32 ip6_table_index, u32 l2_table_index, u32 is_add)
Definition: input_acl.c:59
#define vec_validate_init_empty(V, I, INIT)
Make sure vector is long enough for given index and initialize empty space (no header, unspecified alignment)
Definition: vec.h:485
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:577
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:971
int vnet_feature_enable_disable(const char *arc_name, const char *node_name, u32 sw_if_index, int enable_disable, void *feature_config, u32 n_feature_config_bytes)
Definition: feature.c:225
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169
clib_error_t * input_acl_init(vlib_main_t *vm)
Definition: input_acl.c:183