2 * Copyright (c) 2018 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.
16 #include <plugins/acl/acl.h>
17 #include <plugins/acl/fa_node.h>
18 #include <plugins/acl/public_inlines.h>
19 #include <vlib/unix/plugin.h>
20 #include "hash_lookup.h"
21 #include "elog_acl_trace.h"
23 /* check if a given ACL exists */
24 u8 acl_plugin_acl_exists (u32 acl_index);
26 static u32 get_acl_user_id(acl_main_t *am, char *user_module_name, char *val1_label, char *val2_label)
28 acl_lookup_context_user_t *auser;
30 pool_foreach (auser, am->acl_users,
32 if (0 == strcmp(auser->user_module_name, user_module_name)) {
33 return (auser - am->acl_users);
37 pool_get(am->acl_users, auser);
38 auser->user_module_name = user_module_name;
39 auser->val1_label = val1_label;
40 auser->val2_label = val2_label;
41 return (auser - am->acl_users);
44 static int acl_user_id_valid(acl_main_t *am, u32 acl_user_id)
47 if (pool_is_free_index (am->acl_users, acl_user_id))
53 static int acl_lc_index_valid(acl_main_t *am, u32 lc_index)
56 if (pool_is_free_index (am->acl_lookup_contexts, lc_index))
63 * If you are using ACL plugin, get this unique ID first,
64 * so you can identify yourself when creating the lookup contexts.
67 u32 acl_plugin_register_user_module (char *user_module_name, char *val1_label, char *val2_label)
69 acl_main_t *am = &acl_main;
70 void *oldheap = acl_plugin_set_heap();
71 u32 user_id = get_acl_user_id(am, user_module_name, val1_label, val2_label);
72 clib_mem_set_heap (oldheap);
77 * Allocate a new lookup context index.
78 * Supply the id assigned to your module during registration,
79 * and two values of your choice identifying instances
80 * of use within your module. They are useful for debugging.
81 * If >= 0 - context id. If < 0 - error code.
84 int acl_plugin_get_lookup_context_index (u32 acl_user_id, u32 val1, u32 val2)
86 acl_main_t *am = &acl_main;
87 acl_lookup_context_t *acontext;
89 if (!acl_user_id_valid(am, acl_user_id))
90 return VNET_API_ERROR_INVALID_REGISTRATION;
92 void *oldheap = acl_plugin_set_heap ();
95 pool_get(am->acl_lookup_contexts, acontext);
96 acontext->acl_indices = 0;
97 acontext->context_user_id = acl_user_id;
98 acontext->user_val1 = val1;
99 acontext->user_val2 = val2;
101 u32 new_context_id = acontext - am->acl_lookup_contexts;
102 vec_add1(am->acl_users[acl_user_id].lookup_contexts, new_context_id);
104 clib_mem_set_heap (oldheap);
105 return new_context_id;
109 lock_acl(acl_main_t *am, u32 acl, u32 lc_index)
111 vec_validate(am->lc_index_vec_by_acl, acl);
112 elog_acl_cond_trace_X2(am, (am->trace_acl), "lock acl %d in lc_index %d", "i4i4", acl, lc_index);
113 vec_add1(am->lc_index_vec_by_acl[acl], lc_index);
117 lock_acl_vec(u32 lc_index, u32 *acls)
120 acl_main_t *am = &acl_main;
121 for(i=0; i<vec_len(acls); i++) {
122 lock_acl(am, acls[i], lc_index);
127 unlock_acl(acl_main_t *am, u32 acl, u32 lc_index)
129 vec_validate(am->lc_index_vec_by_acl, acl);
130 elog_acl_cond_trace_X2(am, (am->trace_acl), "unlock acl %d in lc_index %d", "i4i4", acl, lc_index);
131 u32 index = vec_search(am->lc_index_vec_by_acl[acl], lc_index);
133 vec_del1(am->lc_index_vec_by_acl[acl], index);
135 clib_warning("BUG: can not unlock acl %d lc_index %d", acl, lc_index);
139 unlock_acl_vec(u32 lc_index, u32 *acls)
142 acl_main_t *am = &acl_main;
143 for(i=0; i<vec_len(acls); i++)
144 unlock_acl(am, acls[i], lc_index);
149 apply_acl_vec(u32 lc_index, u32 *acls)
152 acl_main_t *am = &acl_main;
154 for(i=0; i<vec_len(acls); i++)
155 hash_acl_apply(am, lc_index, acls[i], i);
160 unapply_acl_vec(u32 lc_index, u32 *acls)
163 acl_main_t *am = &acl_main;
164 if (vec_len(acls) == 0)
166 for(i=vec_len(acls); i > 0; i--)
167 hash_acl_unapply(am, lc_index, acls[i-1]);
171 * Release the lookup context index and destroy
172 * any asssociated data structures.
174 void acl_plugin_put_lookup_context_index (u32 lc_index)
176 acl_main_t *am = &acl_main;
178 elog_acl_cond_trace_X1(am, (am->trace_acl), "LOOKUP-CONTEXT: put-context lc_index %d", "i4", lc_index);
179 if (!acl_lc_index_valid(am, lc_index)) {
180 clib_warning("BUG: lc_index %d is not valid", lc_index);
184 void *oldheap = acl_plugin_set_heap ();
185 acl_lookup_context_t *acontext = pool_elt_at_index(am->acl_lookup_contexts, lc_index);
187 u32 index = vec_search(am->acl_users[acontext->context_user_id].lookup_contexts, lc_index);
190 vec_del1(am->acl_users[acontext->context_user_id].lookup_contexts, index);
191 unapply_acl_vec(lc_index, acontext->acl_indices);
192 unlock_acl_vec(lc_index, acontext->acl_indices);
193 vec_free(acontext->acl_indices);
194 pool_put(am->acl_lookup_contexts, acontext);
195 clib_mem_set_heap (oldheap);
199 * Prepare the sequential vector of ACL#s to lookup within a given context.
200 * Any existing list will be overwritten. acl_list is a vector.
202 int acl_plugin_set_acl_vec_for_context (u32 lc_index, u32 *acl_list)
205 uword *seen_acl_bitmap = 0;
207 acl_main_t *am = &acl_main;
208 acl_lookup_context_t *acontext;
211 elog_acl_cond_trace_X1(am, (1), "LOOKUP-CONTEXT: set-acl-list lc_index %d", "i4", lc_index);
212 for(i=0; i<vec_len(acl_list); i++) {
213 elog_acl_cond_trace_X2(am, (1), " acl-list[%d]: %d", "i4i4", i, acl_list[i]);
216 if (!acl_lc_index_valid(am, lc_index)) {
217 clib_warning("BUG: lc_index %d is not valid", lc_index);
220 void *oldheap = acl_plugin_set_heap ();
222 vec_foreach (pacln, acl_list)
224 if (pool_is_free_index (am->acls, *pacln))
226 /* ACL is not defined. Can not apply */
227 clib_warning ("ERROR: ACL %d not defined", *pacln);
228 rv = VNET_API_ERROR_NO_SUCH_ENTRY;
231 if (clib_bitmap_get (seen_acl_bitmap, *pacln))
233 /* ACL being applied twice within the list. error. */
234 clib_warning ("ERROR: ACL %d being applied twice", *pacln);
235 rv = VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
238 seen_acl_bitmap = clib_bitmap_set (seen_acl_bitmap, *pacln, 1);
241 acontext = pool_elt_at_index(am->acl_lookup_contexts, lc_index);
242 u32 *old_acl_vector = acontext->acl_indices;
243 acontext->acl_indices = vec_dup(acl_list);
245 unapply_acl_vec(lc_index, old_acl_vector);
246 unlock_acl_vec(lc_index, old_acl_vector);
247 lock_acl_vec(lc_index, acontext->acl_indices);
248 apply_acl_vec(lc_index, acontext->acl_indices);
250 vec_free(old_acl_vector);
253 clib_bitmap_free (seen_acl_bitmap);
254 clib_mem_set_heap (oldheap);
259 void acl_plugin_lookup_context_notify_acl_change(u32 acl_num)
261 acl_main_t *am = &acl_main;
262 if (acl_plugin_acl_exists(acl_num)) {
263 if (hash_acl_exists(am, acl_num)) {
264 /* this is a modification, clean up the older entries */
265 hash_acl_delete(am, acl_num);
267 hash_acl_add(am, acl_num);
269 /* this is a deletion notification */
270 hash_acl_delete(am, acl_num);
275 /* Fill the 5-tuple from the packet */
277 void acl_plugin_fill_5tuple (u32 lc_index, vlib_buffer_t * b0, int is_ip6, int is_input,
278 int is_l2_path, fa_5tuple_opaque_t * p5tuple_pkt)
280 acl_plugin_fill_5tuple_inline(lc_index, b0, is_ip6, is_input, is_l2_path, p5tuple_pkt);
283 int acl_plugin_match_5tuple (u32 lc_index,
284 fa_5tuple_opaque_t * pkt_5tuple,
285 int is_ip6, u8 * r_action,
288 u32 * r_rule_match_p,
291 return acl_plugin_match_5tuple_inline (lc_index, pkt_5tuple, is_ip6, r_action, r_acl_pos_p, r_acl_match_p, r_rule_match_p, trace_bitmap);
296 acl_plugin_show_lookup_user (u32 user_index)
298 acl_main_t *am = &acl_main;
299 vlib_main_t *vm = am->vlib_main;
300 acl_lookup_context_user_t *auser;
302 pool_foreach (auser, am->acl_users,
304 u32 curr_user_index = (auser - am->acl_users);
305 if (user_index == ~0 || (curr_user_index == user_index)) {
306 vlib_cli_output (vm, "index %d:%s:%s:%s", curr_user_index, auser->user_module_name, auser->val1_label, auser->val2_label);
313 acl_plugin_show_lookup_context (u32 lc_index)
315 acl_main_t *am = &acl_main;
316 vlib_main_t *vm = am->vlib_main;
317 acl_lookup_context_t *acontext;
318 // clib_warning("LOOKUP-CONTEXT: lc_index %d acl_list [ %U ]", lc_index, format_vec32, acl_list, "%d");
319 if (!am->acl_lookup_contexts)
321 vlib_cli_output(vm, "ACL lookup contexts are not initialized");
325 pool_foreach (acontext, am->acl_lookup_contexts,
327 u32 curr_lc_index = (acontext - am->acl_lookup_contexts);
328 if ((lc_index == ~0) || (curr_lc_index == lc_index)) {
329 if (acl_user_id_valid(am, acontext->context_user_id)) {
330 acl_lookup_context_user_t *auser = pool_elt_at_index(am->acl_users, acontext->context_user_id);
331 vlib_cli_output (vm, "index %d:%s %s: %d %s: %d, acl_indices: %U",
332 curr_lc_index, auser->user_module_name, auser->val1_label,
333 acontext->user_val1, auser->val2_label, acontext->user_val2,
334 format_vec32, acontext->acl_indices, "%d");
336 vlib_cli_output (vm, "index %d: user_id: %d user_val1: %d user_val2: %d, acl_indices: %U",
337 curr_lc_index, acontext->context_user_id,
338 acontext->user_val1, acontext->user_val2,
339 format_vec32, acontext->acl_indices, "%d");