1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef included_acl_h
#define included_acl_h
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/l2/l2_output.h>
#include <vppinfra/hash.h>
#include <vppinfra/error.h>
#include <vppinfra/bitmap.h>
#include <vppinfra/elog.h>
#include "bihash_40_8.h"
#include "fa_node.h"
#define ACL_PLUGIN_VERSION_MAJOR 1
#define ACL_PLUGIN_VERSION_MINOR 2
extern vlib_node_registration_t acl_in_node;
extern vlib_node_registration_t acl_out_node;
void input_acl_packet_match(u32 sw_if_index, vlib_buffer_t * b0, u32 *nextp, u32 *acl_match_p, u32 *rule_match_p, u32 *trace_bitmap);
void output_acl_packet_match(u32 sw_if_index, vlib_buffer_t * b0, u32 *nextp, u32 *acl_match_p, u32 *rule_match_p, u32 *trace_bitmap);
enum acl_timeout_e {
ACL_TIMEOUT_UDP_IDLE = 0,
ACL_TIMEOUT_TCP_IDLE,
ACL_TIMEOUT_TCP_TRANSIENT,
ACL_N_TIMEOUTS
};
enum address_e { IP4, IP6 };
typedef struct
{
enum address_e type;
union {
ip6_address_t ip6;
ip4_address_t ip4;
} addr;
} address_t;
/*
* ACL rules
*/
typedef struct
{
u8 is_permit;
u8 is_ipv6;
ip46_address_t src;
u8 src_prefixlen;
ip46_address_t dst;
u8 dst_prefixlen;
u8 proto;
u16 src_port_or_type_first;
u16 src_port_or_type_last;
u16 dst_port_or_code_first;
u16 dst_port_or_code_last;
u8 tcp_flags_value;
u8 tcp_flags_mask;
} acl_rule_t;
typedef struct
{
u8 is_permit;
u8 is_ipv6;
u8 src_mac[6];
u8 src_mac_mask[6];
ip46_address_t src_ip_addr;
u8 src_prefixlen;
} macip_acl_rule_t;
/*
* ACL
*/
typedef struct
{
u8 tag[64];
u32 count;
acl_rule_t *rules;
} acl_list_t;
typedef struct
{
u8 tag[64];
u32 count;
macip_acl_rule_t *rules;
/* References to the classifier tables that will enforce the rules */
u32 ip4_table_index;
u32 ip6_table_index;
u32 l2_table_index;
} macip_acl_list_t;
typedef struct {
/* API message ID base */
u16 msg_id_base;
acl_list_t *acls; /* Pool of ACLs */
macip_acl_list_t *macip_acls; /* Pool of MAC-IP ACLs */
/* ACLs associated with interfaces */
u32 **input_acl_vec_by_sw_if_index;
u32 **output_acl_vec_by_sw_if_index;
/*
* Classify tables used to grab the packets for the ACL check,
* and serving as the 5-tuple session tables at the same time
*/
u32 *acl_ip4_input_classify_table_by_sw_if_index;
u32 *acl_ip6_input_classify_table_by_sw_if_index;
u32 *acl_ip4_output_classify_table_by_sw_if_index;
u32 *acl_ip6_output_classify_table_by_sw_if_index;
/* MACIP (input) ACLs associated with the interfaces */
u32 *macip_acl_by_sw_if_index;
/* next indices for our nodes in the l2-classify tables */
u32 l2_input_classify_next_acl_old;
u32 l2_output_classify_next_acl_old;
/* next node indices for feature bitmap */
u32 acl_in_node_feat_next_node_index[32];
u32 acl_out_node_feat_next_node_index[32];
/* ACL match actions (must be coherent across in/out ACLs to next indices (can differ) */
u32 acl_in_ip4_match_next[256];
u32 acl_in_ip6_match_next[256];
u32 acl_out_ip4_match_next[256];
u32 acl_out_ip6_match_next[256];
u32 n_match_actions;
/* bitmaps when set the processing is enabled on the interface */
uword *fa_in_acl_on_sw_if_index;
uword *fa_out_acl_on_sw_if_index;
/* bitmap, when set the hash is initialized */
uword *fa_sessions_on_sw_if_index;
clib_bihash_40_8_t *fa_sessions_by_sw_if_index;
/* pool for FA session data. See fa_node.h */
fa_session_t *fa_sessions_pool;
/* The process node which is responsible to deleting the sessions */
u32 fa_cleaner_node_index;
/* FA session timeouts, in seconds */
u32 session_timeout_sec[ACL_N_TIMEOUTS];
/* session add/delete counters */
u64 *fa_session_adds_by_sw_if_index;
u64 *fa_session_dels_by_sw_if_index;
/* L2 datapath glue */
/* active next indices within L2 classifiers - switch old/new path */
u32 l2_input_classify_next_acl_ip4;
u32 l2_input_classify_next_acl_ip6;
u32 l2_output_classify_next_acl_ip4;
u32 l2_output_classify_next_acl_ip6;
/* saved next indices within L2 classifiers for ip4/ip6 fa L2 nodes */
u32 fa_l2_input_classify_next_acl_ip4;
u32 fa_l2_input_classify_next_acl_ip6;
u32 fa_l2_output_classify_next_acl_ip4;
u32 fa_l2_output_classify_next_acl_ip6;
/* next node indices for L2 dispatch */
u32 fa_acl_in_ip4_l2_node_feat_next_node_index[32];
u32 fa_acl_in_ip6_l2_node_feat_next_node_index[32];
u32 fa_acl_out_ip4_l2_node_feat_next_node_index[32];
u32 fa_acl_out_ip6_l2_node_feat_next_node_index[32];
/* EH values that we can skip over */
uword *fa_ipv6_known_eh_bitmap;
/* conn table per-interface conn table parameters */
u32 fa_conn_table_hash_num_buckets;
uword fa_conn_table_hash_memory_size;
u64 fa_conn_table_max_entries;
/*
* If the cleaner has to delete more than this number
* of connections, it halves the sleep time.
*/
#define ACL_FA_DEFAULT_MAX_DELETED_SESSIONS_PER_INTERVAL 100
u64 fa_max_deleted_sessions_per_interval;
/*
* If the cleaner deletes less than these connections,
* it increases the wait time by the "increment"
*/
#define ACL_FA_DEFAULT_MIN_DELETED_SESSIONS_PER_INTERVAL 1
u64 fa_min_deleted_sessions_per_interval;
#define ACL_FA_DEFAULT_CLEANER_WAIT_TIME_INCREMENT 0.1
f64 fa_cleaner_wait_time_increment;
u64 fa_current_cleaner_timer_wait_interval;
u32 fa_conn_list_head[ACL_N_TIMEOUTS];
u32 fa_conn_list_tail[ACL_N_TIMEOUTS];
/* convenience */
vlib_main_t * vlib_main;
vnet_main_t * vnet_main;
} acl_main_t;
#define foreach_acl_eh \
_(HOPBYHOP , 0 , "IPv6ExtHdrHopByHop") \
_(ROUTING , 43 , "IPv6ExtHdrRouting") \
_(DESTOPT , 60 , "IPv6ExtHdrDestOpt") \
_(MOBILITY , 135, "Mobility Header") \
_(HIP , 139, "Experimental use Host Identity Protocol") \
_(SHIM6 , 140, "Shim6 Protocol") \
_(EXP1 , 253, "Use for experimentation and testing") \
_(EXP2 , 254, "Use for experimentation and testing")
/*
"No Next Header" is not a header.
Also, Fragment header needs special processing.
_(NONEXT , 59 , "NoNextHdr") \
_(FRAGMENT , 44 , "IPv6ExtHdrFragment") \
ESP is hiding its internal format, so no point in trying to go past it.
_(ESP , 50 , "EncapsulatingSecurityPayload") \
AH has a special treatment of its length, it is in 32-bit words, not 64-bit words like the rest.
_(AUTH , 51 , "Authentication Header") \
*/
typedef enum {
#define _(N, v, s) ACL_EH_##N = v,
foreach_acl_eh
#undef _
} acl_eh_t;
extern acl_main_t acl_main;
#endif
|
