blob: 8e2b4b5be1bdf74751fbbbbf7e48b2234ff202f3 [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>
Kingwel Xie00bff192019-03-07 01:25:32 -050022#include <vnet/udp/udp.h>
Neale Ranns25edf142019-03-22 08:12:48 +000023#include <vnet/adj/adj_midchain.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070024
25#include <vnet/ipsec/ipsec.h>
Sergio Gonzalez Monroya10f62b2016-11-25 13:36:12 +000026#include <vnet/ipsec/esp.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070027
Matthew Smith2838a232016-06-21 16:05:09 -050028void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
29
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -070030static u8 *
31format_ipsec_name (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070032{
33 u32 dev_instance = va_arg (*args, u32);
Matthew Smith8e1039a2018-04-12 07:32:56 -050034 ipsec_main_t *im = &ipsec_main;
35 ipsec_tunnel_if_t *t = im->tunnel_interfaces + dev_instance;
36
37 return format (s, "ipsec%d", t->show_instance);
Ed Warnickecb9cada2015-12-08 15:45:58 -070038}
39
Klement Sekera31da2e32018-06-24 22:49:55 +020040/* Statistics (not really errors) */
41#define foreach_ipsec_if_tx_error \
42_(TX, "good packets transmitted")
43
Neale Ranns25edf142019-03-22 08:12:48 +000044static void
45ipsec_if_tunnel_stack (adj_index_t ai)
Klement Sekeraa98346f2018-05-16 10:52:45 +020046{
Neale Ranns25edf142019-03-22 08:12:48 +000047 ipsec_main_t *ipm = &ipsec_main;
48 ipsec_tunnel_if_t *it;
49 ip_adjacency_t *adj;
50 u32 sw_if_index;
Klement Sekera31da2e32018-06-24 22:49:55 +020051
Neale Ranns25edf142019-03-22 08:12:48 +000052 adj = adj_get (ai);
53 sw_if_index = adj->rewrite_header.sw_if_index;
54
55 if ((vec_len (ipm->ipsec_if_by_sw_if_index) <= sw_if_index) ||
56 (~0 == ipm->ipsec_if_by_sw_if_index[sw_if_index]))
57 return;
58
59 it = pool_elt_at_index (ipm->tunnel_interfaces,
60 ipm->ipsec_if_by_sw_if_index[sw_if_index]);
61
62 if (!vnet_hw_interface_is_link_up (vnet_get_main (), it->hw_if_index))
63 {
64 adj_midchain_delegate_unstack (ai);
65 }
66 else
67 {
68 ipsec_sa_t *sa;
69
70 sa = ipsec_sa_get (it->output_sa_index);
71
Neale Ranns45d8f852019-03-28 08:59:12 +000072 /* *INDENT-OFF* */
Neale Ranns25edf142019-03-22 08:12:48 +000073 fib_prefix_t pfx = {
74 .fp_addr = sa->tunnel_dst_addr,
Neale Ranns45d8f852019-03-28 08:59:12 +000075 .fp_len = (ipsec_sa_is_set_IS_TUNNEL_V6(sa) ? 128 : 32),
76 .fp_proto = (ipsec_sa_is_set_IS_TUNNEL_V6(sa) ?
77 FIB_PROTOCOL_IP6 :
78 FIB_PROTOCOL_IP4),
Neale Ranns25edf142019-03-22 08:12:48 +000079 };
Neale Ranns45d8f852019-03-28 08:59:12 +000080 /* *INDENT-ON* */
Neale Ranns25edf142019-03-22 08:12:48 +000081
82 adj_midchain_delegate_stack (ai, sa->tx_fib_index, &pfx);
83 }
84}
85
86/**
87 * @brief Call back when restacking all adjacencies on a GRE interface
88 */
89static adj_walk_rc_t
90ipsec_if_adj_walk_cb (adj_index_t ai, void *ctx)
Klement Sekera31da2e32018-06-24 22:49:55 +020091{
Neale Ranns25edf142019-03-22 08:12:48 +000092 ipsec_if_tunnel_stack (ai);
Klement Sekera31da2e32018-06-24 22:49:55 +020093
Neale Ranns25edf142019-03-22 08:12:48 +000094 return (ADJ_WALK_RC_CONTINUE);
Klement Sekeraa98346f2018-05-16 10:52:45 +020095}
96
Neale Ranns77eb28f2019-03-04 14:13:14 +000097static void
Neale Ranns25edf142019-03-22 08:12:48 +000098ipsec_if_tunnel_restack (ipsec_tunnel_if_t * it)
Neale Rannsfe480f62019-02-28 12:03:58 +000099{
Neale Ranns25edf142019-03-22 08:12:48 +0000100 fib_protocol_t proto;
Neale Rannsfe480f62019-02-28 12:03:58 +0000101
Neale Ranns25edf142019-03-22 08:12:48 +0000102 /*
103 * walk all the adjacencies on th GRE interface and restack them
104 */
105 FOR_EACH_FIB_IP_PROTOCOL (proto)
106 {
107 adj_nbr_walk (it->sw_if_index, proto, ipsec_if_adj_walk_cb, NULL);
108 }
Neale Rannsfe480f62019-02-28 12:03:58 +0000109}
110
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000111static clib_error_t *
112ipsec_admin_up_down_function (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
113{
114 ipsec_main_t *im = &ipsec_main;
115 clib_error_t *err = 0;
116 ipsec_tunnel_if_t *t;
117 vnet_hw_interface_t *hi;
118 ipsec_sa_t *sa;
119
120 hi = vnet_get_hw_interface (vnm, hw_if_index);
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100121 t = pool_elt_at_index (im->tunnel_interfaces, hi->hw_instance);
Neale Rannsfe480f62019-02-28 12:03:58 +0000122 t->flags = flags;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100123
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000124 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
125 {
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000126 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100127
Klement Sekerab4d30532018-11-08 13:00:02 +0100128 err = ipsec_check_support_cb (im, sa);
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000129 if (err)
130 return err;
131
Klement Sekerab4d30532018-11-08 13:00:02 +0100132 err = ipsec_add_del_sa_sess_cb (im, t->input_sa_index, 1);
133 if (err)
134 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100135
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000136 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100137
Klement Sekerab4d30532018-11-08 13:00:02 +0100138 err = ipsec_check_support_cb (im, sa);
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000139 if (err)
140 return err;
141
Klement Sekerab4d30532018-11-08 13:00:02 +0100142 err = ipsec_add_del_sa_sess_cb (im, t->output_sa_index, 1);
143 if (err)
144 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100145
Radu Nicolau3f903392017-01-30 14:33:39 +0000146 vnet_hw_interface_set_flags (vnm, hw_if_index,
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000147 VNET_HW_INTERFACE_FLAG_LINK_UP);
148 }
149 else
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100150 {
151 vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100152 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Klement Sekerab4d30532018-11-08 13:00:02 +0100153 err = ipsec_add_del_sa_sess_cb (im, t->input_sa_index, 0);
154 if (err)
155 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100156 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Klement Sekerab4d30532018-11-08 13:00:02 +0100157 err = ipsec_add_del_sa_sess_cb (im, t->output_sa_index, 0);
158 if (err)
159 return err;
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100160 }
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000161
Neale Ranns25edf142019-03-22 08:12:48 +0000162 ipsec_if_tunnel_restack (t);
163
164 return (NULL);
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000165}
166
Neale Ranns25edf142019-03-22 08:12:48 +0000167static u8 *
168ipsec_if_build_rewrite (vnet_main_t * vnm,
169 u32 sw_if_index,
170 vnet_link_t link_type, const void *dst_address)
171{
172 return (NULL);
173}
174
175static void
176ipsec_if_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
177{
178 adj_nbr_midchain_update_rewrite
179 (ai, NULL, NULL, ADJ_FLAG_MIDCHAIN_IP_STACK,
180 ipsec_if_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai), NULL));
181
182 ipsec_if_tunnel_stack (ai);
183}
Klement Sekera31da2e32018-06-24 22:49:55 +0200184
Neale Rannsb80c5362016-10-08 13:03:40 +0100185/* *INDENT-OFF* */
Neale Ranns77eb28f2019-03-04 14:13:14 +0000186VNET_DEVICE_CLASS (ipsec_device_class) =
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700187{
Neale Rannsb80c5362016-10-08 13:03:40 +0100188 .name = "IPSec",
189 .format_device_name = format_ipsec_name,
Sergio Gonzalez Monroyd04b60b2017-01-20 15:35:23 +0000190 .admin_up_down_function = ipsec_admin_up_down_function,
Neale Rannsb80c5362016-10-08 13:03:40 +0100191};
192/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700193
Neale Rannsb80c5362016-10-08 13:03:40 +0100194/* *INDENT-OFF* */
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700195VNET_HW_INTERFACE_CLASS (ipsec_hw_class) =
196{
Neale Rannsb80c5362016-10-08 13:03:40 +0100197 .name = "IPSec",
198 .build_rewrite = default_build_rewrite,
Neale Ranns25edf142019-03-22 08:12:48 +0000199 .update_adjacency = ipsec_if_update_adj,
Matthew Smith922549a2017-05-24 16:18:27 -0500200 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
Neale Rannsb80c5362016-10-08 13:03:40 +0100201};
202/* *INDENT-ON* */
Matthew Smith2838a232016-06-21 16:05:09 -0500203
204static int
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700205ipsec_add_del_tunnel_if_rpc_callback (ipsec_add_del_tunnel_args_t * a)
Matthew Smith2838a232016-06-21 16:05:09 -0500206{
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700207 vnet_main_t *vnm = vnet_get_main ();
Damjan Marion586afd72017-04-05 19:18:20 +0200208 ASSERT (vlib_get_thread_index () == 0);
Matthew Smith2838a232016-06-21 16:05:09 -0500209
Matthew Smithe04d09d2017-05-14 21:47:18 -0500210 return ipsec_add_del_tunnel_if_internal (vnm, a, NULL);
Matthew Smith2838a232016-06-21 16:05:09 -0500211}
212
213int
214ipsec_add_del_tunnel_if (ipsec_add_del_tunnel_args_t * args)
215{
216 vl_api_rpc_call_main_thread (ipsec_add_del_tunnel_if_rpc_callback,
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700217 (u8 *) args, sizeof (*args));
Matthew Smith2838a232016-06-21 16:05:09 -0500218 return 0;
219}
220
Neale Ranns8d7c5022019-02-06 01:41:05 -0800221static u32
222ipsec_tun_mk_input_sa_id (u32 ti)
223{
224 return (0x80000000 | ti);
225}
226
227static u32
228ipsec_tun_mk_output_sa_id (u32 ti)
229{
230 return (0xc0000000 | ti);
231}
232
Neale Rannsd6c9e822019-04-17 16:29:00 -0700233static void
Neale Rannse8915fc2019-04-23 20:57:55 -0400234ipsec_tunnel_feature_set (ipsec_main_t * im, ipsec_tunnel_if_t * t, u8 enable)
Neale Rannsd6c9e822019-04-17 16:29:00 -0700235{
Neale Rannse8915fc2019-04-23 20:57:55 -0400236 u8 arc;
237
238 arc = vnet_get_feature_arc_index ("ip4-output");
239
240 vnet_feature_enable_disable_with_index (arc,
241 im->esp4_encrypt_tun_feature_index,
242 t->sw_if_index, enable,
243 &t->output_sa_index,
244 sizeof (t->output_sa_index));
245
246 arc = vnet_get_feature_arc_index ("ip6-output");
247
248 vnet_feature_enable_disable_with_index (arc,
249 im->esp6_encrypt_tun_feature_index,
250 t->sw_if_index, enable,
251 &t->output_sa_index,
252 sizeof (t->output_sa_index));
Neale Rannsd6c9e822019-04-17 16:29:00 -0700253}
254
Matthew Smith2838a232016-06-21 16:05:09 -0500255int
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700256ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
Matthew Smithe04d09d2017-05-14 21:47:18 -0500257 ipsec_add_del_tunnel_args_t * args,
258 u32 * sw_if_index)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700259{
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700260 ipsec_tunnel_if_t *t;
261 ipsec_main_t *im = &ipsec_main;
Matthew Smithe04d09d2017-05-14 21:47:18 -0500262 vnet_hw_interface_t *hi = NULL;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700263 u32 hw_if_index = ~0;
264 uword *p;
Matthew Smith8e1039a2018-04-12 07:32:56 -0500265 u32 dev_instance;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800266 ipsec_key_t crypto_key, integ_key;
267 ipsec_sa_flags_t flags;
268 int rv;
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400269 int is_ip6 = args->is_ip6;
270 ipsec4_tunnel_key_t key4;
271 ipsec6_tunnel_key_t key6;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700272
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400273 if (!is_ip6)
274 {
275 key4.remote_ip = args->remote_ip.ip4.as_u32;
276 key4.spi = clib_host_to_net_u32 (args->remote_spi);
277 p = hash_get (im->ipsec4_if_pool_index_by_key, key4.as_u64);
278 }
279 else
280 {
281 key6.remote_ip = args->remote_ip.ip6;
282 key6.spi = clib_host_to_net_u32 (args->remote_spi);
283 p = hash_get_mem (im->ipsec6_if_pool_index_by_key, &key6);
284 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700285
286 if (args->is_add)
287 {
288 /* check if same src/dst pair exists */
289 if (p)
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700290 return VNET_API_ERROR_INVALID_VALUE;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700291
Neale Rannsfe480f62019-02-28 12:03:58 +0000292 pool_get_aligned_zero (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700293
Matthew Smith8e1039a2018-04-12 07:32:56 -0500294 dev_instance = t - im->tunnel_interfaces;
295 if (args->renumber)
296 t->show_instance = args->show_instance;
297 else
298 t->show_instance = dev_instance;
299
300 if (hash_get (im->ipsec_if_real_dev_by_show_dev, t->show_instance))
301 {
302 pool_put (im->tunnel_interfaces, t);
303 return VNET_API_ERROR_INSTANCE_IN_USE;
304 }
305
306 hash_set (im->ipsec_if_real_dev_by_show_dev, t->show_instance,
307 dev_instance);
308
Neale Ranns8d7c5022019-02-06 01:41:05 -0800309 flags = IPSEC_SA_FLAG_IS_TUNNEL;
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400310 if (args->is_ip6)
311 flags |= IPSEC_SA_FLAG_IS_TUNNEL_V6;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800312 if (args->udp_encap)
313 flags |= IPSEC_SA_FLAG_UDP_ENCAP;
314 if (args->esn)
Damjan Marion1e3aa5e2019-03-28 10:58:59 +0100315 flags |= IPSEC_SA_FLAG_USE_ESN;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800316 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,
Neale Ranns2b5ba952019-04-02 10:15:40 +0000331 (flags | IPSEC_SA_FLAG_IS_INBOUND),
Neale Ranns8d7c5022019-02-06 01:41:05 -0800332 args->tx_table_id,
Neale Ranns47feb112019-04-11 15:14:07 +0000333 args->salt,
Neale Ranns8d7c5022019-02-06 01:41:05 -0800334 &args->remote_ip,
335 &args->local_ip, &t->input_sa_index);
336
337 if (rv)
Neale Rannsaf3f0782019-03-26 08:21:25 +0000338 return VNET_API_ERROR_INVALID_SRC_ADDRESS;
Neale Ranns8d7c5022019-02-06 01:41:05 -0800339
340 ipsec_mk_key (&crypto_key,
341 args->local_crypto_key, args->local_crypto_key_len);
342 ipsec_mk_key (&integ_key,
343 args->local_integ_key, args->local_integ_key_len);
344
345 rv = ipsec_sa_add (ipsec_tun_mk_output_sa_id (dev_instance),
346 args->local_spi,
347 IPSEC_PROTOCOL_ESP,
348 args->crypto_alg,
349 &crypto_key,
350 args->integ_alg,
351 &integ_key,
352 flags,
353 args->tx_table_id,
Neale Ranns47feb112019-04-11 15:14:07 +0000354 args->salt,
Neale Ranns8d7c5022019-02-06 01:41:05 -0800355 &args->local_ip,
356 &args->remote_ip, &t->output_sa_index);
357
358 if (rv)
Neale Rannsaf3f0782019-03-26 08:21:25 +0000359 return VNET_API_ERROR_INVALID_DST_ADDRESS;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700360
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400361 /* copy the key */
362 if (is_ip6)
363 hash_set_mem_alloc (&im->ipsec6_if_pool_index_by_key, &key6,
364 t - im->tunnel_interfaces);
365 else
366 hash_set (im->ipsec4_if_pool_index_by_key, key4.as_u64,
367 t - im->tunnel_interfaces);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700368
Matthew Smith8e1039a2018-04-12 07:32:56 -0500369 hw_if_index = vnet_register_interface (vnm, ipsec_device_class.index,
370 t - im->tunnel_interfaces,
371 ipsec_hw_class.index,
372 t - im->tunnel_interfaces);
Matthew Smithe04d09d2017-05-14 21:47:18 -0500373
374 hi = vnet_get_hw_interface (vnm, hw_if_index);
Klement Sekera31da2e32018-06-24 22:49:55 +0200375
Ed Warnickecb9cada2015-12-08 15:45:58 -0700376 t->hw_if_index = hw_if_index;
Neale Rannsfe480f62019-02-28 12:03:58 +0000377 t->sw_if_index = hi->sw_if_index;
378
Neale Rannsd7603d92019-03-28 08:56:10 +0000379 /* Standard default jumbo MTU. */
380 vnet_sw_interface_set_mtu (vnm, t->sw_if_index, 9000);
381
Neale Ranns25edf142019-03-22 08:12:48 +0000382 /* Add the new tunnel to the DB of tunnels per sw_if_index ... */
383 vec_validate_init_empty (im->ipsec_if_by_sw_if_index, t->sw_if_index,
384 ~0);
385 im->ipsec_if_by_sw_if_index[t->sw_if_index] = dev_instance;
386
Neale Rannse8915fc2019-04-23 20:57:55 -0400387 ipsec_tunnel_feature_set (im, t, 1);
Neale Ranns25edf142019-03-22 08:12:48 +0000388
Ed Warnickecb9cada2015-12-08 15:45:58 -0700389 /*1st interface, register protocol */
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700390 if (pool_elts (im->tunnel_interfaces) == 1)
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400391 {
392 ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
393 ipsec4_if_input_node.index);
394 ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP,
395 ipsec6_if_input_node.index);
396 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700397
Ed Warnickecb9cada2015-12-08 15:45:58 -0700398 }
399 else
400 {
Neale Rannsc80cc9a2019-03-20 14:10:23 +0000401 u32 ti;
402
Ed Warnickecb9cada2015-12-08 15:45:58 -0700403 /* check if exists */
404 if (!p)
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700405 return VNET_API_ERROR_INVALID_VALUE;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700406
Neale Rannsc80cc9a2019-03-20 14:10:23 +0000407 ti = p[0];
408 t = pool_elt_at_index (im->tunnel_interfaces, ti);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700409 hi = vnet_get_hw_interface (vnm, t->hw_if_index);
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700410 vnet_sw_interface_set_flags (vnm, hi->sw_if_index, 0); /* admin down */
Matthew Smith537eeec2018-04-09 11:49:20 -0500411
Neale Rannse8915fc2019-04-23 20:57:55 -0400412 ipsec_tunnel_feature_set (im, t, 0);
Matthew Smith8e1039a2018-04-12 07:32:56 -0500413 vnet_delete_hw_interface (vnm, t->hw_if_index);
Matthew Smith01034be2017-05-16 11:51:18 -0500414
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400415 if (is_ip6)
416 hash_unset_mem_free (&im->ipsec6_if_pool_index_by_key, &key6);
417 else
418 hash_unset (im->ipsec4_if_pool_index_by_key, key4.as_u64);
419
Matthew Smith8e1039a2018-04-12 07:32:56 -0500420 hash_unset (im->ipsec_if_real_dev_by_show_dev, t->show_instance);
Neale Ranns25edf142019-03-22 08:12:48 +0000421 im->ipsec_if_by_sw_if_index[t->sw_if_index] = ~0;
Matthew Smith8e1039a2018-04-12 07:32:56 -0500422
Ed Warnickecb9cada2015-12-08 15:45:58 -0700423 pool_put (im->tunnel_interfaces, t);
Neale Ranns8d7c5022019-02-06 01:41:05 -0800424
425 /* delete input and output SA */
Neale Rannsc80cc9a2019-03-20 14:10:23 +0000426 ipsec_sa_del (ipsec_tun_mk_input_sa_id (ti));
427 ipsec_sa_del (ipsec_tun_mk_output_sa_id (ti));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700428 }
Matthew Smithe04d09d2017-05-14 21:47:18 -0500429
430 if (sw_if_index)
431 *sw_if_index = hi->sw_if_index;
432
Ed Warnickecb9cada2015-12-08 15:45:58 -0700433 return 0;
434}
435
436int
Matus Fabian694265d2016-08-10 01:55:36 -0700437ipsec_add_del_ipsec_gre_tunnel (vnet_main_t * vnm,
Neale Rannse524d452019-02-19 15:22:46 +0000438 const ipsec_gre_tunnel_add_del_args_t * args)
Matus Fabian694265d2016-08-10 01:55:36 -0700439{
440 ipsec_tunnel_if_t *t = 0;
441 ipsec_main_t *im = &ipsec_main;
442 uword *p;
443 ipsec_sa_t *sa;
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400444 ipsec4_tunnel_key_t key;
Matus Fabian694265d2016-08-10 01:55:36 -0700445 u32 isa, osa;
446
447 p = hash_get (im->sa_index_by_sa_id, args->local_sa_id);
448 if (!p)
449 return VNET_API_ERROR_INVALID_VALUE;
Neale Rannse524d452019-02-19 15:22:46 +0000450 osa = p[0];
451 sa = pool_elt_at_index (im->sad, p[0]);
452 ipsec_sa_set_IS_GRE (sa);
Matus Fabian694265d2016-08-10 01:55:36 -0700453
454 p = hash_get (im->sa_index_by_sa_id, args->remote_sa_id);
455 if (!p)
456 return VNET_API_ERROR_INVALID_VALUE;
Neale Rannse524d452019-02-19 15:22:46 +0000457 isa = p[0];
Matus Fabian694265d2016-08-10 01:55:36 -0700458 sa = pool_elt_at_index (im->sad, p[0]);
Neale Rannse524d452019-02-19 15:22:46 +0000459 ipsec_sa_set_IS_GRE (sa);
Matus Fabian694265d2016-08-10 01:55:36 -0700460
Neale Rannse524d452019-02-19 15:22:46 +0000461 /* we form the key from the input/remote SA whose tunnel is srouce
462 * at the remote end */
Damjan Mariond709cbc2019-03-26 13:16:42 +0100463 if (ipsec_sa_is_set_IS_TUNNEL (sa))
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400464 {
Neale Rannse524d452019-02-19 15:22:46 +0000465 key.remote_ip = sa->tunnel_src_addr.ip4.as_u32;
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400466 key.spi = clib_host_to_net_u32 (sa->spi);
467 }
Matus Fabian694265d2016-08-10 01:55:36 -0700468 else
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400469 {
Neale Rannse524d452019-02-19 15:22:46 +0000470 key.remote_ip = args->src.as_u32;
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400471 key.spi = clib_host_to_net_u32 (sa->spi);
472 }
Matus Fabian694265d2016-08-10 01:55:36 -0700473
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400474 p = hash_get (im->ipsec4_if_pool_index_by_key, key.as_u64);
Matus Fabian694265d2016-08-10 01:55:36 -0700475
476 if (args->is_add)
477 {
478 /* check if same src/dst pair exists */
479 if (p)
480 return VNET_API_ERROR_INVALID_VALUE;
481
482 pool_get_aligned (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES);
Dave Barachb7b92992018-10-17 10:38:51 -0400483 clib_memset (t, 0, sizeof (*t));
Matus Fabian694265d2016-08-10 01:55:36 -0700484
485 t->input_sa_index = isa;
486 t->output_sa_index = osa;
487 t->hw_if_index = ~0;
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400488 hash_set (im->ipsec4_if_pool_index_by_key, key.as_u64,
Matus Fabian694265d2016-08-10 01:55:36 -0700489 t - im->tunnel_interfaces);
490
491 /*1st interface, register protocol */
492 if (pool_elts (im->tunnel_interfaces) == 1)
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400493 {
494 ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
495 ipsec4_if_input_node.index);
496 /* TBD, GRE IPSec6
497 *
498 ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP,
499 ipsec6_if_input_node.index);
500 */
501 }
Matus Fabian694265d2016-08-10 01:55:36 -0700502 }
503 else
504 {
505 /* check if exists */
506 if (!p)
507 return VNET_API_ERROR_INVALID_VALUE;
508
509 t = pool_elt_at_index (im->tunnel_interfaces, p[0]);
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400510 hash_unset (im->ipsec4_if_pool_index_by_key, key.as_u64);
Matus Fabian694265d2016-08-10 01:55:36 -0700511 pool_put (im->tunnel_interfaces, t);
512 }
513 return 0;
514}
515
516int
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700517ipsec_set_interface_key (vnet_main_t * vnm, u32 hw_if_index,
518 ipsec_if_set_key_type_t type, u8 alg, u8 * key)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700519{
Damjan Mariond1bed682019-04-24 15:20:35 +0200520 vlib_main_t *vm = vlib_get_main ();
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700521 ipsec_main_t *im = &ipsec_main;
522 vnet_hw_interface_t *hi;
523 ipsec_tunnel_if_t *t;
524 ipsec_sa_t *sa;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700525
526 hi = vnet_get_hw_interface (vnm, hw_if_index);
527 t = pool_elt_at_index (im->tunnel_interfaces, hi->dev_instance);
528
Sergio Gonzalez Monroydb93cd92017-08-26 15:22:05 +0100529 if (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)
530 return VNET_API_ERROR_SYSCALL_ERROR_1;
531
Ed Warnickecb9cada2015-12-08 15:45:58 -0700532 if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO)
533 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700534 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Damjan Marionb966e8b2019-03-20 16:07:09 +0100535 ipsec_sa_set_crypto_alg (sa, alg);
Neale Ranns8d7c5022019-02-06 01:41:05 -0800536 ipsec_mk_key (&sa->crypto_key, key, vec_len (key));
Damjan Mariond1bed682019-04-24 15:20:35 +0200537 sa->crypto_calg = im->crypto_algs[alg].alg;
538 vnet_crypto_key_modify (vm, sa->crypto_key_index, sa->crypto_calg,
539 key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700540 }
541 else if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG)
542 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700543 sa = pool_elt_at_index (im->sad, t->output_sa_index);
Damjan Marionb966e8b2019-03-20 16:07:09 +0100544 ipsec_sa_set_integ_alg (sa, alg);
Neale Ranns8d7c5022019-02-06 01:41:05 -0800545 ipsec_mk_key (&sa->integ_key, key, vec_len (key));
Damjan Mariond1bed682019-04-24 15:20:35 +0200546 sa->integ_calg = im->integ_algs[alg].alg;
547 vnet_crypto_key_modify (vm, sa->integ_key_index, sa->integ_calg,
548 key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700549 }
550 else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO)
551 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700552 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Damjan Marionb966e8b2019-03-20 16:07:09 +0100553 ipsec_sa_set_crypto_alg (sa, alg);
Neale Ranns8d7c5022019-02-06 01:41:05 -0800554 ipsec_mk_key (&sa->crypto_key, key, vec_len (key));
Damjan Mariond1bed682019-04-24 15:20:35 +0200555 sa->crypto_calg = im->crypto_algs[alg].alg;
556 vnet_crypto_key_modify (vm, sa->crypto_key_index, sa->crypto_calg,
557 key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700558 }
559 else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG)
560 {
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700561 sa = pool_elt_at_index (im->sad, t->input_sa_index);
Damjan Marionb966e8b2019-03-20 16:07:09 +0100562 ipsec_sa_set_integ_alg (sa, alg);
Neale Ranns8d7c5022019-02-06 01:41:05 -0800563 ipsec_mk_key (&sa->integ_key, key, vec_len (key));
Damjan Mariond1bed682019-04-24 15:20:35 +0200564 sa->integ_calg = im->integ_algs[alg].alg;
565 vnet_crypto_key_modify (vm, sa->integ_key_index, sa->integ_calg,
566 key, vec_len (key));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700567 }
568 else
569 return VNET_API_ERROR_INVALID_VALUE;
570
571 return 0;
572}
573
574
Matthew Smithca514fd2017-10-12 12:06:59 -0500575int
576ipsec_set_interface_sa (vnet_main_t * vnm, u32 hw_if_index, u32 sa_id,
577 u8 is_outbound)
578{
579 ipsec_main_t *im = &ipsec_main;
580 vnet_hw_interface_t *hi;
581 ipsec_tunnel_if_t *t;
582 ipsec_sa_t *sa, *old_sa;
583 u32 sa_index, old_sa_index;
584 uword *p;
585
586 hi = vnet_get_hw_interface (vnm, hw_if_index);
587 t = pool_elt_at_index (im->tunnel_interfaces, hi->dev_instance);
588
589 sa_index = ipsec_get_sa_index_by_sa_id (sa_id);
590 if (sa_index == ~0)
591 {
592 clib_warning ("SA with ID %u not found", sa_id);
593 return VNET_API_ERROR_INVALID_VALUE;
594 }
595
596 if (ipsec_is_sa_used (sa_index))
597 {
598 clib_warning ("SA with ID %u is already in use", sa_id);
599 return VNET_API_ERROR_INVALID_VALUE;
600 }
601
602 sa = pool_elt_at_index (im->sad, sa_index);
Matthew Smithca514fd2017-10-12 12:06:59 -0500603
604 if (!is_outbound)
605 {
Matthew Smithca514fd2017-10-12 12:06:59 -0500606 old_sa_index = t->input_sa_index;
607 old_sa = pool_elt_at_index (im->sad, old_sa_index);
608
Damjan Mariond709cbc2019-03-26 13:16:42 +0100609 if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ^
610 ipsec_sa_is_set_IS_TUNNEL_V6 (old_sa))
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400611 {
612 clib_warning ("IPsec interface SA endpoints type can't be changed");
613 return VNET_API_ERROR_INVALID_VALUE;
614 }
Matthew Smithca514fd2017-10-12 12:06:59 -0500615
Damjan Mariond709cbc2019-03-26 13:16:42 +0100616 if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400617 {
618 ipsec6_tunnel_key_t key;
619
620 /* unset old inbound hash entry. packets should stop arriving */
621 key.remote_ip = old_sa->tunnel_src_addr.ip6;
622 key.spi = clib_host_to_net_u32 (old_sa->spi);
623
624 p = hash_get_mem (im->ipsec6_if_pool_index_by_key, &key);
625 if (p)
626 hash_unset_mem_free (&im->ipsec6_if_pool_index_by_key, &key);
627
628 /* set new inbound SA, then set new hash entry */
629 t->input_sa_index = sa_index;
630 key.remote_ip = sa->tunnel_src_addr.ip6;
631 key.spi = clib_host_to_net_u32 (sa->spi);
632
633 hash_set_mem_alloc (&im->ipsec6_if_pool_index_by_key, &key,
634 hi->dev_instance);
635 }
636 else
637 {
638 ipsec4_tunnel_key_t key;
639
640 /* unset old inbound hash entry. packets should stop arriving */
641 key.remote_ip = old_sa->tunnel_src_addr.ip4.as_u32;
642 key.spi = clib_host_to_net_u32 (old_sa->spi);
643
644 p = hash_get (im->ipsec4_if_pool_index_by_key, key.as_u64);
645 if (p)
646 hash_unset (im->ipsec4_if_pool_index_by_key, key.as_u64);
647
648 /* set new inbound SA, then set new hash entry */
649 t->input_sa_index = sa_index;
650 key.remote_ip = sa->tunnel_src_addr.ip4.as_u32;
651 key.spi = clib_host_to_net_u32 (sa->spi);
652
653 hash_set (im->ipsec4_if_pool_index_by_key, key.as_u64,
654 hi->dev_instance);
655 }
Matthew Smithca514fd2017-10-12 12:06:59 -0500656 }
657 else
658 {
659 old_sa_index = t->output_sa_index;
660 old_sa = pool_elt_at_index (im->sad, old_sa_index);
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400661
Damjan Mariond709cbc2019-03-26 13:16:42 +0100662 if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ^
663 ipsec_sa_is_set_IS_TUNNEL_V6 (old_sa))
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400664 {
665 clib_warning ("IPsec interface SA endpoints type can't be changed");
666 return VNET_API_ERROR_INVALID_VALUE;
667 }
668
Neale Rannsd6c9e822019-04-17 16:29:00 -0700669 /*
670 * re-enable the feature to get the new SA in
671 * the workers are stopped so no packets are sent in the clear
672 */
Neale Rannse8915fc2019-04-23 20:57:55 -0400673 ipsec_tunnel_feature_set (im, t, 0);
Matthew Smithca514fd2017-10-12 12:06:59 -0500674 t->output_sa_index = sa_index;
Neale Rannse8915fc2019-04-23 20:57:55 -0400675 ipsec_tunnel_feature_set (im, t, 1);
Matthew Smithca514fd2017-10-12 12:06:59 -0500676 }
677
678 /* remove sa_id to sa_index mapping on old SA */
679 if (ipsec_get_sa_index_by_sa_id (old_sa->id) == old_sa_index)
680 hash_unset (im->sa_index_by_sa_id, old_sa->id);
681
Matthew Smith41b25cf2018-12-05 14:41:21 -0600682 if (ipsec_add_del_sa_sess_cb (im, old_sa_index, 0))
Matthew Smithca514fd2017-10-12 12:06:59 -0500683 {
Klement Sekerab4d30532018-11-08 13:00:02 +0100684 clib_warning ("IPsec backend add/del callback returned error");
685 return VNET_API_ERROR_SYSCALL_ERROR_1;
Matthew Smithca514fd2017-10-12 12:06:59 -0500686 }
Neale Rannsd6c9e822019-04-17 16:29:00 -0700687 ipsec_sa_del (old_sa->id);
Matthew Smithca514fd2017-10-12 12:06:59 -0500688
689 return 0;
690}
691
Ed Warnickecb9cada2015-12-08 15:45:58 -0700692clib_error_t *
693ipsec_tunnel_if_init (vlib_main_t * vm)
694{
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700695 ipsec_main_t *im = &ipsec_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700696
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400697 /* initialize the ipsec-if ip4 hash */
698 im->ipsec4_if_pool_index_by_key =
699 hash_create (0, sizeof (ipsec4_tunnel_key_t));
700 /* initialize the ipsec-if ip6 hash */
701 im->ipsec6_if_pool_index_by_key = hash_create_mem (0,
702 sizeof
703 (ipsec6_tunnel_key_t),
704 sizeof (uword));
Matthew Smith8e1039a2018-04-12 07:32:56 -0500705 im->ipsec_if_real_dev_by_show_dev = hash_create (0, sizeof (uword));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700706
Kingwel Xie1ba5bc82019-03-20 07:21:58 -0400707 udp_register_dst_port (vm, UDP_DST_PORT_ipsec, ipsec4_if_input_node.index,
Kingwel Xie00bff192019-03-07 01:25:32 -0500708 1);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700709 return 0;
710}
711
712VLIB_INIT_FUNCTION (ipsec_tunnel_if_init);
713
Keith Burns (alagalah)166a9d42016-08-06 11:00:56 -0700714
715/*
716 * fd.io coding-style-patch-verification: ON
717 *
718 * Local Variables:
719 * eval: (c-set-style "gnu")
720 * End:
721 */