fix declaration of symbol of different size
[vpp.git] / vnet / vnet / ipsec / ipsec.h
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 #if DPDK==1
16 #include <vnet/devices/dpdk/dpdk.h>
17 #endif
18
19 #define foreach_ipsec_policy_action \
20   _(0, BYPASS,  "bypass")          \
21   _(1, DISCARD, "discard")         \
22   _(2, RESOLVE, "resolve")         \
23   _(3, PROTECT, "protect")
24
25 typedef enum {
26 #define _(v,f,s) IPSEC_POLICY_ACTION_##f = v,
27   foreach_ipsec_policy_action
28 #undef _
29   IPSEC_POLICY_N_ACTION,
30 } ipsec_policy_action_t;
31
32 #define foreach_ipsec_crypto_alg \
33   _(0, NONE,  "none")               \
34   _(1, AES_CBC_128, "aes-cbc-128")  \
35   _(2, AES_CBC_192, "aes-cbc-192")  \
36   _(3, AES_CBC_256, "aes-cbc-256")
37
38 typedef enum {
39 #define _(v,f,s) IPSEC_CRYPTO_ALG_##f = v,
40   foreach_ipsec_crypto_alg
41 #undef _
42   IPSEC_CRYPTO_N_ALG,
43 } ipsec_crypto_alg_t;
44
45 #define foreach_ipsec_integ_alg \
46   _(0, NONE,  "none")                                                     \
47   _(1, MD5_96, "md5-96")           /* RFC2403 */                          \
48   _(2, SHA1_96, "sha1-96")         /* RFC2404 */                          \
49   _(3, SHA_256_96, "sha-256-96")   /* draft-ietf-ipsec-ciph-sha-256-00 */ \
50   _(4, SHA_256_128, "sha-256-128") /* RFC4868 */                          \
51   _(5, SHA_384_192, "sha-384-192") /* RFC4868 */                          \
52   _(6, SHA_512_256, "sha-512-256") /* RFC4868 */
53
54 typedef enum {
55 #define _(v,f,s) IPSEC_INTEG_ALG_##f = v,
56   foreach_ipsec_integ_alg
57 #undef _
58   IPSEC_INTEG_N_ALG,
59 } ipsec_integ_alg_t;
60
61 typedef enum {
62         IPSEC_PROTOCOL_AH = 0,
63         IPSEC_PROTOCOL_ESP = 1
64 } ipsec_protocol_t;
65
66 typedef struct {
67     u32 id;
68     u32 spi;
69     ipsec_protocol_t protocol;
70
71     ipsec_crypto_alg_t crypto_alg;
72     u8 crypto_key_len;
73     u8 crypto_key[128];
74
75     ipsec_integ_alg_t integ_alg;
76     u8 integ_key_len;
77     u8 integ_key[128];
78
79     u8 use_esn;
80     u8 use_anti_replay;
81
82     u8 is_tunnel;
83     u8 is_tunnel_ip6;
84     ip46_address_t tunnel_src_addr;
85     ip46_address_t tunnel_dst_addr;
86
87     /* runtime */
88     u32 seq;
89     u32 seq_hi;
90     u32 last_seq;
91     u32 last_seq_hi;
92     u64 replay_window;
93 } ipsec_sa_t;
94
95 typedef struct {
96   ip46_address_t start, stop;
97 } ip46_address_range_t;
98
99 typedef struct {
100   u16 start, stop;
101 } port_range_t;
102
103 typedef struct {
104   u8 is_add;
105   u8 esn;
106   u8 anti_replay;
107   ip4_address_t local_ip, remote_ip;
108   u32 local_spi;
109   u32 remote_spi;
110 } ipsec_add_del_tunnel_args_t;
111
112 typedef enum {
113   IPSEC_IF_SET_KEY_TYPE_NONE,
114   IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO,
115   IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO,
116   IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG,
117   IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG,
118 } ipsec_if_set_key_type_t;
119
120 typedef  struct {
121     u32 id;
122     i32 priority;
123     u8 is_outbound;
124
125     // Selector
126     u8 is_ipv6;
127     ip46_address_range_t laddr;
128     ip46_address_range_t raddr;
129     u8 protocol;
130     port_range_t lport;
131     port_range_t rport;
132
133     // Policy
134     u8 policy;
135     u32 sa_id;
136     u32 sa_index;
137
138     // Counter
139     vlib_counter_t counter;
140 } ipsec_policy_t;
141
142 typedef struct {
143         u32 id;
144         /* pool of policies */
145         ipsec_policy_t * policies;
146         /* vectors of policy indices */
147         u32 * ipv4_outbound_policies;
148         u32 * ipv6_outbound_policies;
149         u32 * ipv4_inbound_protect_policy_indices;
150         u32 * ipv4_inbound_policy_discard_and_bypass_indices;
151         u32 * ipv6_inbound_protect_policy_indices;
152         u32 * ipv6_inbound_policy_discard_and_bypass_indices;
153 } ipsec_spd_t;
154
155 typedef struct {
156   u32 spd_index;
157 } ip4_ipsec_config_t;
158
159 typedef struct {
160   u32 spd_index;
161 } ip6_ipsec_config_t;
162
163 typedef struct {
164   u32 input_sa_index;
165   u32 output_sa_index;
166   u32 hw_if_index;
167 } ipsec_tunnel_if_t;
168
169 typedef struct {
170   /* pool of tunnel instances */
171   ipsec_spd_t * spds;
172   ipsec_sa_t * sad;
173
174   /* pool of tunnel interfaces */
175   ipsec_tunnel_if_t * tunnel_interfaces;
176   u32 * free_tunnel_if_indices;
177
178   u32 * empty_buffers;
179
180   uword * tunnel_index_by_key;
181
182   /* convenience */
183   vlib_main_t *vlib_main;
184   vnet_main_t *vnet_main;
185
186   /* next node indices */
187   u32 feature_next_node_index[32];
188
189   /* hashes */
190   uword * spd_index_by_spd_id;
191   uword * spd_index_by_sw_if_index;
192   uword * sa_index_by_sa_id;
193   uword * ipsec_if_pool_index_by_key;
194
195   /* node indexes */
196   u32 error_drop_node_index;
197   u32 ip4_lookup_node_index;
198   u32 esp_encrypt_node_index;
199
200 } ipsec_main_t;
201
202 ipsec_main_t ipsec_main;
203
204 extern vlib_node_registration_t esp_encrypt_node;
205 extern vlib_node_registration_t esp_decrypt_node;
206 extern vlib_node_registration_t ipsec_if_output_node;
207 extern vlib_node_registration_t ipsec_if_input_node;
208
209
210 /*
211  * functions
212  */
213 int ipsec_set_interface_spd(vlib_main_t * vm, u32 sw_if_index, u32 spd_id, int is_add);
214 int ipsec_add_del_spd(vlib_main_t * vm, u32 spd_id, int is_add);
215 int ipsec_add_del_policy(vlib_main_t * vm, ipsec_policy_t * policy, int is_add);
216 int ipsec_add_del_sa(vlib_main_t * vm, ipsec_sa_t * new_sa, int is_add);
217 int ipsec_set_sa_key(vlib_main_t * vm, ipsec_sa_t * sa_update);
218
219 u8 * format_ipsec_if_output_trace (u8 * s, va_list * args);
220 u8 * format_ipsec_policy_action (u8 * s, va_list * args);
221 u8 * format_ipsec_crypto_alg (u8 * s, va_list * args);
222 u8 * format_ipsec_integ_alg (u8 * s, va_list * args);
223 u8 * format_ipsec_replay_window(u8 * s, va_list * args);
224 uword unformat_ipsec_policy_action (unformat_input_t * input, va_list * args);
225 uword unformat_ipsec_crypto_alg (unformat_input_t * input, va_list * args);
226 uword unformat_ipsec_integ_alg (unformat_input_t * input, va_list * args);
227
228 u32 ipsec_add_del_tunnel_if (vnet_main_t * vnm, ipsec_add_del_tunnel_args_t * args);
229 int ipsec_set_interface_key(vnet_main_t * vnm, u32 hw_if_index, ipsec_if_set_key_type_t type, u8 alg, u8 * key);
230
231
232 /*
233  *  inline functions
234  */
235
236 always_inline void
237 ipsec_alloc_empty_buffers(vlib_main_t * vm, ipsec_main_t *im)
238 {
239 #if DPDK==1
240   dpdk_main_t * dm = &dpdk_main;
241   u32 free_list_index = dm->vlib_buffer_free_list_index;
242 #else
243   u32 free_list_index = VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX;
244 #endif
245   uword l = vec_len (im->empty_buffers);
246   uword n_alloc = 0;
247
248   if (PREDICT_FALSE(l < VLIB_FRAME_SIZE))
249     {
250       if (!im->empty_buffers) {
251         vec_alloc (im->empty_buffers, 2 * VLIB_FRAME_SIZE );
252       }
253
254       n_alloc = vlib_buffer_alloc_from_free_list (vm, im->empty_buffers + l,
255                                                   2 * VLIB_FRAME_SIZE - l,
256                                                   free_list_index);
257
258       _vec_len (im->empty_buffers) = l + n_alloc;
259     }
260 }
261
262 static_always_inline u32 /* FIXME move to interface???.h */
263 get_next_output_feature_node_index( vnet_main_t * vnm,
264                                     vlib_buffer_t * b)
265 {
266   vlib_main_t * vm = vlib_get_main();
267   vlib_node_t * node;
268   u32 r;
269   intf_output_feat_t next_feature;
270
271   u8 * node_names[] = {
272 #define _(sym, str) (u8 *) str,
273     foreach_intf_output_feat
274 #undef _
275   };
276
277   count_trailing_zeros(next_feature, vnet_buffer(b)->output_features.bitmap);
278
279   if (next_feature >= INTF_OUTPUT_FEAT_DONE)
280     {
281       u32 sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_TX];
282       vnet_hw_interface_t * hw = vnet_get_sup_hw_interface(vnm, sw_if_index);
283       r = hw->output_node_index;
284     }
285   else
286     {
287       vnet_buffer(b)->output_features.bitmap &= ~(1 << next_feature);
288       /* FIXME */
289       node = vlib_get_node_by_name(vm, node_names[next_feature]);
290       r = node->index;
291     }
292
293   return r;
294 }