blob: 3ec4b0b460c20ffe3431dd7ae02cb416dc599224 [file] [log] [blame]
Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
2 * ipsec_if.c : IPSec interface support
3 *
4 * Copyright (c) 2015 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#include <vnet/vnet.h>
19#include <vnet/api_errno.h>
20#include <vnet/ip/ip.h>
Pierre Pfister4c422f92018-12-10 11:19:08 +010021#include <vnet/fib/fib.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070022
23#include <vnet/ipsec/ipsec.h>
Sergio Gonzalez Monroya10f62b2016-11-25 13:36:12 +000024#include <vnet/ipsec/esp.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070025
Matthew Smith2838a232016-06-21 16:05:09 -050026void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
27
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070028static u8 *
29format_ipsec_name (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070030{
31 u32 dev_instance = va_arg (*args, u32);
Matthew Smith8e1039a2018-04-12 07:32:56 -050032 ipsec_main_t *im = &ipsec_main;
33 ipsec_tunnel_if_t *t = im->tunnel_interfaces + dev_instance;
34
35 return format (s, "ipsec%d", t->show_instance);
Ed Warnickecb9cada2015-12-08 15:45:58 -070036}
37
Klement Sekera31da2e32018-06-24 22:49:55 +020038/* Statistics (not really errors) */
39#define foreach_ipsec_if_tx_error \
40_(TX, "good packets transmitted")
41
42static char *ipsec_if_tx_error_strings[] = {
43#define _(sym,string) string,
44 foreach_ipsec_if_tx_error
45#undef _
46};
47
48typedef enum
Klement Sekeraa98346f2018-05-16 10:52:45 +020049{
Klement Sekera31da2e32018-06-24 22:49:55 +020050#define _(sym,str) IPSEC_IF_OUTPUT_ERROR_##sym,
51 foreach_ipsec_if_tx_error
52#undef _
53 IPSEC_IF_TX_N_ERROR,
54} ipsec_if_tx_error_t;
55
56typedef struct
57{
58 u32 spi;
59 u32 seq;
60} ipsec_if_tx_trace_t;
61
62u8 *
63format_ipsec_if_tx_trace (u8 * s, va_list * args)
64{
65 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
66 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
67 ipsec_if_tx_trace_t *t = va_arg (*args, ipsec_if_tx_trace_t *);
68
69 s = format (s, "IPSec: spi %u seq %u", t->spi, t->seq);
70 return s;
Klement Sekeraa98346f2018-05-16 10:52:45 +020071}
72
Klement Sekera31da2e32018-06-24 22:49:55 +020073static uword
74ipsec_if_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
75 vlib_frame_t * from_frame)
76{
77 ipsec_main_t *im = &ipsec_main;
78 vnet_main_t *vnm = im->vnet_main;
79 vnet_interface_main_t *vim = &vnm->interface_main;
80 u32 *from, *to_next = 0, next_index;
81 u32 n_left_from, sw_if_index0, last_sw_if_index = ~0;
Damjan Marion067cd622018-07-11 12:47:43 +020082 u32 thread_index = vm->thread_index;
Klement Sekera31da2e32018-06-24 22:49:55 +020083 u32 n_bytes = 0, n_packets = 0;
84
85 from = vlib_frame_vector_args (from_frame);
86 n_left_from = from_frame->n_vectors;
87 next_index = node->cached_next_index;
88
89 while (n_left_from > 0)
90 {
91 u32 n_left_to_next;
92
93 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
94
95 while (n_left_from > 0 && n_left_to_next > 0)
96 {
97 u32 bi0, next0, len0;
98 vlib_buffer_t *b0;
99 ipsec_tunnel_if_t *t0;
100 vnet_hw_interface_t *hi0;
101
102 bi0 = to_next[0] = from[0];
103 from += 1;
104 n_left_from -= 1;
105 to_next += 1;
106 n_left_to_next -= 1;
107 b0 = vlib_get_buffer (vm, bi0);
108 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
109 hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
110 t0 = pool_elt_at_index (im->tunnel_interfaces, hi0->dev_instance);
111 vnet_buffer (b0)->ipsec.sad_index = t0->output_sa_index;
Kingwel Xiec69ac312019-02-04 01:49:29 -0800112
113 /* 0, tx-node next[0] was added by vlib_node_add_next_with_slot */
114 next0 = 0;
Klement Sekera31da2e32018-06-24 22:49:55 +0200115
116 len0 = vlib_buffer_length_in_chain (vm, b0);
117
118 if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
119 {
120 n_packets++;
121 n_bytes += len0;
122 }
123 else
124 {
125 vlib_increment_combined_counter (vim->combined_sw_if_counters +
126 VNET_INTERFACE_COUNTER_TX,
127 thread_index, sw_if_index0,
128 n_packets, n_bytes);
129 last_sw_if_index = sw_if_index0;
130 n_packets = 1;
131 n_bytes = len0;
132 }
133
134 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
135 {
136 ipsec_if_tx_trace_t *tr =
137 vlib_add_trace (vm, node, b0, sizeof (*tr));
138 ipsec_sa_t *sa0 =
139 pool_elt_at_index (im->sad, t0->output_sa_index);
140 tr->spi = sa0->spi;
141 tr->seq = sa0->seq;
142 }
143
144 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
145 n_left_to_next, bi0, next0);
146 }
147 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
148 }
149
150 if (last_sw_if_index != ~0)
151 {
152 vlib_increment_combined_counter (vim->combined_sw_if_counters +
153 VNET_INTERFACE_COUNTER_TX,
154 thread_index,
155 last_sw_if_index, n_packets, n_bytes);
156 }
157
158 return from_frame->n_vectors;
159}
160
161
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000162static clib_error_t *
163ipsec_admin_up_down_function (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
164{
165 ipsec_main_t *im = &ipsec_main;
166 clib_error_t *err = 0;
167 ipsec_tunnel_if_t *t;
168 vnet_hw_interface_t *hi;
169 ipsec_sa_t *sa;
170
171 hi = vnet_get_hw_interface (vnm, hw_if_index);
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100172 t = pool_elt_at_index (im->tunnel_interfaces, hi->hw_instance);
173
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000174 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
175 {
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000176 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100177
Klement Sekerab4d30532018-11-08 13:00:02 +0100178 err = ipsec_check_support_cb (im, sa);
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000179 if (err)
180 return err;
181
Klement Sekerab4d30532018-11-08 13:00:02 +0100182 err = ipsec_add_del_sa_sess_cb (im, t->input_sa_index, 1);
183 if (err)
184 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100185
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000186 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100187
Klement Sekerab4d30532018-11-08 13:00:02 +0100188 err = ipsec_check_support_cb (im, sa);
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000189 if (err)
190 return err;
191
Klement Sekerab4d30532018-11-08 13:00:02 +0100192 err = ipsec_add_del_sa_sess_cb (im, t->output_sa_index, 1);
193 if (err)
194 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100195
Radu Nicolau3f903392017-01-30 14:33:39 +0000196 vnet_hw_interface_set_flags (vnm, hw_if_index,
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000197 VNET_HW_INTERFACE_FLAG_LINK_UP);
198 }
199 else
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100200 {
201 vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100202 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Klement Sekerab4d30532018-11-08 13:00:02 +0100203 err = ipsec_add_del_sa_sess_cb (im, t->input_sa_index, 0);
204 if (err)
205 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100206 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Klement Sekerab4d30532018-11-08 13:00:02 +0100207 err = ipsec_add_del_sa_sess_cb (im, t->output_sa_index, 0);
208 if (err)
209 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100210 }
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000211
212 return /* no error */ 0;
213}
214
Klement Sekera31da2e32018-06-24 22:49:55 +0200215
Neale Rannsb80c5362016-10-08 13:03:40 +0100216/* *INDENT-OFF* */
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700217VNET_DEVICE_CLASS (ipsec_device_class, static) =
218{
Neale Rannsb80c5362016-10-08 13:03:40 +0100219 .name = "IPSec",
220 .format_device_name = format_ipsec_name,
Klement Sekera31da2e32018-06-24 22:49:55 +0200221 .format_tx_trace = format_ipsec_if_tx_trace,
222 .tx_function = ipsec_if_tx_node_fn,
223 .tx_function_n_errors = IPSEC_IF_TX_N_ERROR,
224 .tx_function_error_strings = ipsec_if_tx_error_strings,
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000225 .admin_up_down_function = ipsec_admin_up_down_function,
Neale Rannsb80c5362016-10-08 13:03:40 +0100226};
227/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700228
Neale Rannsb80c5362016-10-08 13:03:40 +0100229/* *INDENT-OFF* */
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700230VNET_HW_INTERFACE_CLASS (ipsec_hw_class) =
231{
Neale Rannsb80c5362016-10-08 13:03:40 +0100232 .name = "IPSec",
233 .build_rewrite = default_build_rewrite,
Matthew Smith922549a2017-05-24 16:18:27 -0500234 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
Neale Rannsb80c5362016-10-08 13:03:40 +0100235};
236/* *INDENT-ON* */
Matthew Smith2838a232016-06-21 16:05:09 -0500237
238static int
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700239ipsec_add_del_tunnel_if_rpc_callback (ipsec_add_del_tunnel_args_t * a)
Matthew Smith2838a232016-06-21 16:05:09 -0500240{
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700241 vnet_main_t *vnm = vnet_get_main ();
Damjan Marion586afd72017-04-05 19:18:20 +0200242 ASSERT (vlib_get_thread_index () == 0);
Matthew Smith2838a232016-06-21 16:05:09 -0500243
Matthew Smithe04d09d2017-05-14 21:47:18 -0500244 return ipsec_add_del_tunnel_if_internal (vnm, a, NULL);
Matthew Smith2838a232016-06-21 16:05:09 -0500245}
246
247int
248ipsec_add_del_tunnel_if (ipsec_add_del_tunnel_args_t * args)
249{
250 vl_api_rpc_call_main_thread (ipsec_add_del_tunnel_if_rpc_callback,
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700251 (u8 *) args, sizeof (*args));
Matthew Smith2838a232016-06-21 16:05:09 -0500252 return 0;
253}
254
Neale Ranns8d7c5022019-02-06 01:41:05 -0800255static u32
256ipsec_tun_mk_input_sa_id (u32 ti)
257{
258 return (0x80000000 | ti);
259}
260
261static u32
262ipsec_tun_mk_output_sa_id (u32 ti)
263{
264 return (0xc0000000 | ti);
265}
266
Matthew Smith2838a232016-06-21 16:05:09 -0500267int
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700268ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
Matthew Smithe04d09d2017-05-14 21:47:18 -0500269 ipsec_add_del_tunnel_args_t * args,
270 u32 * sw_if_index)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700271{
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700272 ipsec_tunnel_if_t *t;
273 ipsec_main_t *im = &ipsec_main;
Matthew Smithe04d09d2017-05-14 21:47:18 -0500274 vnet_hw_interface_t *hi = NULL;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700275 u32 hw_if_index = ~0;
276 uword *p;
Matthew Smith8e1039a2018-04-12 07:32:56 -0500277 u32 dev_instance;
Klement Sekera31da2e32018-06-24 22:49:55 +0200278 u32 slot;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800279 ipsec_key_t crypto_key, integ_key;
280 ipsec_sa_flags_t flags;
281 int rv;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700282
Neale Ranns7ba8fe22019-02-11 11:24:07 +0000283 u64 key = ((u64) args->remote_ip.ip4.as_u32 << 32 |
284 (u64) clib_host_to_net_u32 (args->remote_spi));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700285 p = hash_get (im->ipsec_if_pool_index_by_key, key);
286
287 if (args->is_add)
288 {
289 /* check if same src/dst pair exists */
290 if (p)
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700291 return VNET_API_ERROR_INVALID_VALUE;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700292
293 pool_get_aligned (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES);
Dave Barachb7b92992018-10-17 10:38:51 -0400294 clib_memset (t, 0, sizeof (*t));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700295
Matthew Smith8e1039a2018-04-12 07:32:56 -0500296 dev_instance = t - im->tunnel_interfaces;
297 if (args->renumber)
298 t->show_instance = args->show_instance;
299 else
300 t->show_instance = dev_instance;
301
302 if (hash_get (im->ipsec_if_real_dev_by_show_dev, t->show_instance))
303 {
304 pool_put (im->tunnel_interfaces, t);
305 return VNET_API_ERROR_INSTANCE_IN_USE;
306 }
307
308 hash_set (im->ipsec_if_real_dev_by_show_dev, t->show_instance,
309 dev_instance);
310
Neale Ranns8d7c5022019-02-06 01:41:05 -0800311 flags = IPSEC_SA_FLAG_IS_TUNNEL;
312 if (args->udp_encap)
313 flags |= IPSEC_SA_FLAG_UDP_ENCAP;
314 if (args->esn)
315 flags |= IPSEC_SA_FLAG_USE_EXTENDED_SEQ_NUM;
316 if (args->anti_replay)
317 flags |= IPSEC_SA_FLAG_USE_ANTI_REPLAY;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700318
Neale Ranns8d7c5022019-02-06 01:41:05 -0800319 ipsec_mk_key (&crypto_key,
320 args->remote_crypto_key, args->remote_crypto_key_len);
321 ipsec_mk_key (&integ_key,
322 args->remote_integ_key, args->remote_integ_key_len);
323
324 rv = ipsec_sa_add (ipsec_tun_mk_input_sa_id (dev_instance),
325 args->remote_spi,
326 IPSEC_PROTOCOL_ESP,
327 args->crypto_alg,
328 &crypto_key,
329 args->integ_alg,
330 &integ_key,
331 flags,
332 args->tx_table_id,
333 &args->remote_ip,
334 &args->local_ip, &t->input_sa_index);
335
336 if (rv)
337 return VNET_API_ERROR_UNIMPLEMENTED;
338
339 ipsec_mk_key (&crypto_key,
340 args->local_crypto_key, args->local_crypto_key_len);
341 ipsec_mk_key (&integ_key,
342 args->local_integ_key, args->local_integ_key_len);
343
344 rv = ipsec_sa_add (ipsec_tun_mk_output_sa_id (dev_instance),
345 args->local_spi,
346 IPSEC_PROTOCOL_ESP,
347 args->crypto_alg,
348 &crypto_key,
349 args->integ_alg,
350 &integ_key,
351 flags,
352 args->tx_table_id,
353 &args->local_ip,
354 &args->remote_ip, &t->output_sa_index);
355
356 if (rv)
357 return VNET_API_ERROR_UNIMPLEMENTED;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700358
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700359 hash_set (im->ipsec_if_pool_index_by_key, key,
360 t - im->tunnel_interfaces);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700361
Matthew Smith8e1039a2018-04-12 07:32:56 -0500362 hw_if_index = vnet_register_interface (vnm, ipsec_device_class.index,
363 t - im->tunnel_interfaces,
364 ipsec_hw_class.index,
365 t - im->tunnel_interfaces);
Matthew Smithe04d09d2017-05-14 21:47:18 -0500366
367 hi = vnet_get_hw_interface (vnm, hw_if_index);
Kingwel Xiec69ac312019-02-04 01:49:29 -0800368 /* add esp4 as the next-node-index of this tx-node */
Klement Sekera31da2e32018-06-24 22:49:55 +0200369
Matthew Smith0e36bbf2018-07-05 14:45:58 -0500370 slot = vlib_node_add_next_with_slot
Kingwel Xiec69ac312019-02-04 01:49:29 -0800371 (vnm->vlib_main, hi->tx_node_index, im->esp4_encrypt_node_index, 0);
Klement Sekera31da2e32018-06-24 22:49:55 +0200372
Kingwel Xiec69ac312019-02-04 01:49:29 -0800373 ASSERT (slot == 0);
Klement Sekera31da2e32018-06-24 22:49:55 +0200374
Ed Warnickecb9cada2015-12-08 15:45:58 -0700375 t->hw_if_index = hw_if_index;
376
Matthew Smith537eeec2018-04-09 11:49:20 -0500377 vnet_feature_enable_disable ("interface-output", "ipsec-if-output",
378 hi->sw_if_index, 1, 0, 0);
379
Ed Warnickecb9cada2015-12-08 15:45:58 -0700380 /*1st interface, register protocol */
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700381 if (pool_elts (im->tunnel_interfaces) == 1)
382 ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
383 ipsec_if_input_node.index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700384
Ed Warnickecb9cada2015-12-08 15:45:58 -0700385 }
386 else
387 {
388 /* check if exists */
389 if (!p)
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700390 return VNET_API_ERROR_INVALID_VALUE;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700391
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700392 t = pool_elt_at_index (im->tunnel_interfaces, p[0]);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700393 hi = vnet_get_hw_interface (vnm, t->hw_if_index);
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700394 vnet_sw_interface_set_flags (vnm, hi->sw_if_index, 0); /* admin down */
Matthew Smith537eeec2018-04-09 11:49:20 -0500395
396 vnet_feature_enable_disable ("interface-output", "ipsec-if-output",
397 hi->sw_if_index, 0, 0, 0);
398
Matthew Smith8e1039a2018-04-12 07:32:56 -0500399 vnet_delete_hw_interface (vnm, t->hw_if_index);
Matthew Smith01034be2017-05-16 11:51:18 -0500400
Ed Warnickecb9cada2015-12-08 15:45:58 -0700401 hash_unset (im->ipsec_if_pool_index_by_key, key);
Matthew Smith8e1039a2018-04-12 07:32:56 -0500402 hash_unset (im->ipsec_if_real_dev_by_show_dev, t->show_instance);
403
Ed Warnickecb9cada2015-12-08 15:45:58 -0700404 pool_put (im->tunnel_interfaces, t);
Neale Ranns8d7c5022019-02-06 01:41:05 -0800405
406 /* delete input and output SA */
407 ipsec_sa_del (ipsec_tun_mk_input_sa_id (p[0]));
408 ipsec_sa_del (ipsec_tun_mk_output_sa_id (p[0]));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700409 }
Matthew Smithe04d09d2017-05-14 21:47:18 -0500410
411 if (sw_if_index)
412 *sw_if_index = hi->sw_if_index;
413
Ed Warnickecb9cada2015-12-08 15:45:58 -0700414 return 0;
415}
416
417int
Matus Fabian694265d2016-08-10 01:55:36 -0700418ipsec_add_del_ipsec_gre_tunnel (vnet_main_t * vnm,
419 ipsec_add_del_ipsec_gre_tunnel_args_t * args)
420{
421 ipsec_tunnel_if_t *t = 0;
422 ipsec_main_t *im = &ipsec_main;
423 uword *p;
424 ipsec_sa_t *sa;
425 u64 key;
426 u32 isa, osa;
427
428 p = hash_get (im->sa_index_by_sa_id, args->local_sa_id);
429 if (!p)
430 return VNET_API_ERROR_INVALID_VALUE;
431 isa = p[0];
432
433 p = hash_get (im->sa_index_by_sa_id, args->remote_sa_id);
434 if (!p)
435 return VNET_API_ERROR_INVALID_VALUE;
436 osa = p[0];
437 sa = pool_elt_at_index (im->sad, p[0]);
438
439 if (sa->is_tunnel)
Neale Ranns7ba8fe22019-02-11 11:24:07 +0000440 key = ((u64) sa->tunnel_dst_addr.ip4.as_u32 << 32 |
441 (u64) clib_host_to_net_u32 (sa->spi));
Matus Fabian694265d2016-08-10 01:55:36 -0700442 else
Neale Ranns7ba8fe22019-02-11 11:24:07 +0000443 key = ((u64) args->remote_ip.as_u32 << 32 |
444 (u64) clib_host_to_net_u32 (sa->spi));
Matus Fabian694265d2016-08-10 01:55:36 -0700445
446 p = hash_get (im->ipsec_if_pool_index_by_key, key);
447
448 if (args->is_add)
449 {
450 /* check if same src/dst pair exists */
451 if (p)
452 return VNET_API_ERROR_INVALID_VALUE;
453
454 pool_get_aligned (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES);
Dave Barachb7b92992018-10-17 10:38:51 -0400455 clib_memset (t, 0, sizeof (*t));
Matus Fabian694265d2016-08-10 01:55:36 -0700456
457 t->input_sa_index = isa;
458 t->output_sa_index = osa;
459 t->hw_if_index = ~0;
460 hash_set (im->ipsec_if_pool_index_by_key, key,
461 t - im->tunnel_interfaces);
462
463 /*1st interface, register protocol */
464 if (pool_elts (im->tunnel_interfaces) == 1)
465 ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
466 ipsec_if_input_node.index);
467 }
468 else
469 {
470 /* check if exists */
471 if (!p)
472 return VNET_API_ERROR_INVALID_VALUE;
473
474 t = pool_elt_at_index (im->tunnel_interfaces, p[0]);
475 hash_unset (im->ipsec_if_pool_index_by_key, key);
476 pool_put (im->tunnel_interfaces, t);
477 }
478 return 0;
479}
480
481int
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700482ipsec_set_interface_key (vnet_main_t * vnm, u32 hw_if_index,
483 ipsec_if_set_key_type_t type, u8 alg, u8 * key)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700484{
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700485 ipsec_main_t *im = &ipsec_main;
486 vnet_hw_interface_t *hi;
487 ipsec_tunnel_if_t *t;
488 ipsec_sa_t *sa;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700489
490 hi = vnet_get_hw_interface (vnm, hw_if_index);
491 t = pool_elt_at_index (im->tunnel_interfaces, hi->dev_instance);
492
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100493 if (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)
494 return VNET_API_ERROR_SYSCALL_ERROR_1;
495
Ed Warnickecb9cada2015-12-08 15:45:58 -0700496 if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO)
497 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700498 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700499 sa->crypto_alg = alg;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800500 ipsec_mk_key (&sa->crypto_key, key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700501 }
502 else if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG)
503 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700504 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700505 sa->integ_alg = alg;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800506 ipsec_mk_key (&sa->integ_key, key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700507 }
508 else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO)
509 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700510 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700511 sa->crypto_alg = alg;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800512 ipsec_mk_key (&sa->crypto_key, key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700513 }
514 else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG)
515 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700516 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700517 sa->integ_alg = alg;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800518 ipsec_mk_key (&sa->integ_key, key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700519 }
520 else
521 return VNET_API_ERROR_INVALID_VALUE;
522
523 return 0;
524}
525
526
Matthew Smithca514fd2017-10-12 12:06:59 -0500527int
528ipsec_set_interface_sa (vnet_main_t * vnm, u32 hw_if_index, u32 sa_id,
529 u8 is_outbound)
530{
531 ipsec_main_t *im = &ipsec_main;
532 vnet_hw_interface_t *hi;
533 ipsec_tunnel_if_t *t;
534 ipsec_sa_t *sa, *old_sa;
535 u32 sa_index, old_sa_index;
536 uword *p;
537
538 hi = vnet_get_hw_interface (vnm, hw_if_index);
539 t = pool_elt_at_index (im->tunnel_interfaces, hi->dev_instance);
540
541 sa_index = ipsec_get_sa_index_by_sa_id (sa_id);
542 if (sa_index == ~0)
543 {
544 clib_warning ("SA with ID %u not found", sa_id);
545 return VNET_API_ERROR_INVALID_VALUE;
546 }
547
548 if (ipsec_is_sa_used (sa_index))
549 {
550 clib_warning ("SA with ID %u is already in use", sa_id);
551 return VNET_API_ERROR_INVALID_VALUE;
552 }
553
554 sa = pool_elt_at_index (im->sad, sa_index);
555 if (sa->is_tunnel_ip6)
556 {
557 clib_warning ("IPsec interface not supported with IPv6 endpoints");
558 return VNET_API_ERROR_UNIMPLEMENTED;
559 }
560
561 if (!is_outbound)
562 {
563 u64 key;
564
565 old_sa_index = t->input_sa_index;
566 old_sa = pool_elt_at_index (im->sad, old_sa_index);
567
568 /* unset old inbound hash entry. packets should stop arriving */
Neale Ranns7ba8fe22019-02-11 11:24:07 +0000569 key = ((u64) old_sa->tunnel_src_addr.ip4.as_u32 << 32 |
570 (u64) clib_host_to_net_u32 (old_sa->spi));
Matthew Smithca514fd2017-10-12 12:06:59 -0500571 p = hash_get (im->ipsec_if_pool_index_by_key, key);
572 if (p)
573 hash_unset (im->ipsec_if_pool_index_by_key, key);
574
575 /* set new inbound SA, then set new hash entry */
576 t->input_sa_index = sa_index;
Neale Ranns7ba8fe22019-02-11 11:24:07 +0000577 key = ((u64) sa->tunnel_src_addr.ip4.as_u32 << 32 |
578 (u64) clib_host_to_net_u32 (sa->spi));
Matthew Smithca514fd2017-10-12 12:06:59 -0500579 hash_set (im->ipsec_if_pool_index_by_key, key, hi->dev_instance);
580 }
581 else
582 {
583 old_sa_index = t->output_sa_index;
584 old_sa = pool_elt_at_index (im->sad, old_sa_index);
585 t->output_sa_index = sa_index;
586 }
587
588 /* remove sa_id to sa_index mapping on old SA */
589 if (ipsec_get_sa_index_by_sa_id (old_sa->id) == old_sa_index)
590 hash_unset (im->sa_index_by_sa_id, old_sa->id);
591
Matthew Smith41b25cf2018-12-05 14:41:21 -0600592 if (ipsec_add_del_sa_sess_cb (im, old_sa_index, 0))
Matthew Smithca514fd2017-10-12 12:06:59 -0500593 {
Klement Sekerab4d30532018-11-08 13:00:02 +0100594 clib_warning ("IPsec backend add/del callback returned error");
595 return VNET_API_ERROR_SYSCALL_ERROR_1;
Matthew Smithca514fd2017-10-12 12:06:59 -0500596 }
Matthew Smithca514fd2017-10-12 12:06:59 -0500597 pool_put (im->sad, old_sa);
598
599 return 0;
600}
601
602
Ed Warnickecb9cada2015-12-08 15:45:58 -0700603clib_error_t *
604ipsec_tunnel_if_init (vlib_main_t * vm)
605{
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700606 ipsec_main_t *im = &ipsec_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700607
608 im->ipsec_if_pool_index_by_key = hash_create (0, sizeof (uword));
Matthew Smith8e1039a2018-04-12 07:32:56 -0500609 im->ipsec_if_real_dev_by_show_dev = hash_create (0, sizeof (uword));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700610
611 return 0;
612}
613
614VLIB_INIT_FUNCTION (ipsec_tunnel_if_init);
615
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700616
617/*
618 * fd.io coding-style-patch-verification: ON
619 *
620 * Local Variables:
621 * eval: (c-set-style "gnu")
622 * End:
623 */