2 * ipsec_if.c : IPSec interface support
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:
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/ip/ip.h>
22 #include <vnet/ipsec/ipsec.h>
24 void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
27 format_ipsec_name (u8 * s, va_list * args)
29 u32 dev_instance = va_arg (*args, u32);
30 return format (s, "ipsec%d", dev_instance);
34 dummy_interface_tx (vlib_main_t * vm,
35 vlib_node_runtime_t * node, vlib_frame_t * frame)
37 clib_warning ("you shouldn't be here, leaking buffers...");
38 return frame->n_vectors;
41 VNET_DEVICE_CLASS (ipsec_device_class, static) =
43 .name = "IPSec",.format_device_name = format_ipsec_name,.format_tx_trace =
44 format_ipsec_if_output_trace,.tx_function = dummy_interface_tx,};
46 VNET_HW_INTERFACE_CLASS (ipsec_hw_class) =
52 ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
53 ipsec_add_del_tunnel_args_t * args);
56 ipsec_add_del_tunnel_if_rpc_callback (ipsec_add_del_tunnel_args_t * a)
58 vnet_main_t *vnm = vnet_get_main ();
59 ASSERT (os_get_cpu_number () == 0);
61 return ipsec_add_del_tunnel_if_internal (vnm, a);
65 ipsec_add_del_tunnel_if (ipsec_add_del_tunnel_args_t * args)
67 vl_api_rpc_call_main_thread (ipsec_add_del_tunnel_if_rpc_callback,
68 (u8 *) args, sizeof (*args));
73 ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
74 ipsec_add_del_tunnel_args_t * args)
77 ipsec_main_t *im = &ipsec_main;
78 vnet_hw_interface_t *hi;
83 u64 key = (u64) args->remote_ip.as_u32 << 32 | (u64) args->remote_spi;
84 p = hash_get (im->ipsec_if_pool_index_by_key, key);
88 /* check if same src/dst pair exists */
90 return VNET_API_ERROR_INVALID_VALUE;
92 pool_get_aligned (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES);
93 memset (t, 0, sizeof (*t));
95 pool_get (im->sad, sa);
96 memset (sa, 0, sizeof (*sa));
97 t->input_sa_index = sa - im->sad;
98 sa->spi = args->remote_spi;
99 sa->tunnel_src_addr.ip4.as_u32 = args->remote_ip.as_u32;
100 sa->tunnel_dst_addr.ip4.as_u32 = args->local_ip.as_u32;
102 sa->use_esn = args->esn;
103 sa->use_anti_replay = args->anti_replay;
104 sa->integ_alg = args->integ_alg;
105 if (args->remote_integ_key_len <= sizeof (args->remote_integ_key))
107 sa->integ_key_len = args->remote_integ_key_len;
108 clib_memcpy (sa->integ_key, args->remote_integ_key,
109 args->remote_integ_key_len);
111 sa->crypto_alg = args->crypto_alg;
112 if (args->remote_crypto_key_len <= sizeof (args->remote_crypto_key))
114 sa->crypto_key_len = args->remote_crypto_key_len;
115 clib_memcpy (sa->crypto_key, args->remote_crypto_key,
116 args->remote_crypto_key_len);
119 pool_get (im->sad, sa);
120 memset (sa, 0, sizeof (*sa));
121 t->output_sa_index = sa - im->sad;
122 sa->spi = args->local_spi;
123 sa->tunnel_src_addr.ip4.as_u32 = args->local_ip.as_u32;
124 sa->tunnel_dst_addr.ip4.as_u32 = args->remote_ip.as_u32;
127 sa->use_esn = args->esn;
128 sa->use_anti_replay = args->anti_replay;
129 sa->integ_alg = args->integ_alg;
130 if (args->local_integ_key_len <= sizeof (args->local_integ_key))
132 sa->integ_key_len = args->local_integ_key_len;
133 clib_memcpy (sa->integ_key, args->local_integ_key,
134 args->local_integ_key_len);
136 sa->crypto_alg = args->crypto_alg;
137 if (args->local_crypto_key_len <= sizeof (args->local_crypto_key))
139 sa->crypto_key_len = args->local_crypto_key_len;
140 clib_memcpy (sa->crypto_key, args->local_crypto_key,
141 args->local_crypto_key_len);
144 hash_set (im->ipsec_if_pool_index_by_key, key,
145 t - im->tunnel_interfaces);
147 if (vec_len (im->free_tunnel_if_indices) > 0)
150 im->free_tunnel_if_indices[vec_len (im->free_tunnel_if_indices) -
152 _vec_len (im->free_tunnel_if_indices) -= 1;
157 vnet_register_interface (vnm, ipsec_device_class.index,
158 t - im->tunnel_interfaces,
159 ipsec_hw_class.index,
160 t - im->tunnel_interfaces);
162 hi = vnet_get_hw_interface (vnm, hw_if_index);
163 hi->output_node_index = ipsec_if_output_node.index;
165 t->hw_if_index = hw_if_index;
167 /*1st interface, register protocol */
168 if (pool_elts (im->tunnel_interfaces) == 1)
169 ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
170 ipsec_if_input_node.index);
176 /* check if exists */
178 return VNET_API_ERROR_INVALID_VALUE;
180 t = pool_elt_at_index (im->tunnel_interfaces, p[0]);
181 hi = vnet_get_hw_interface (vnm, t->hw_if_index);
182 vnet_sw_interface_set_flags (vnm, hi->sw_if_index, 0); /* admin down */
183 vec_add1 (im->free_tunnel_if_indices, t->hw_if_index);
185 /* delete input and output SA */
186 sa = pool_elt_at_index (im->sad, t->input_sa_index);
187 pool_put (im->sad, sa);
188 sa = pool_elt_at_index (im->sad, t->output_sa_index);
189 pool_put (im->sad, sa);
191 hash_unset (im->ipsec_if_pool_index_by_key, key);
192 pool_put (im->tunnel_interfaces, t);
198 ipsec_set_interface_key (vnet_main_t * vnm, u32 hw_if_index,
199 ipsec_if_set_key_type_t type, u8 alg, u8 * key)
201 ipsec_main_t *im = &ipsec_main;
202 vnet_hw_interface_t *hi;
203 ipsec_tunnel_if_t *t;
206 hi = vnet_get_hw_interface (vnm, hw_if_index);
207 t = pool_elt_at_index (im->tunnel_interfaces, hi->dev_instance);
209 if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO)
211 sa = pool_elt_at_index (im->sad, t->output_sa_index);
212 sa->crypto_alg = alg;
213 sa->crypto_key_len = vec_len (key);
214 clib_memcpy (sa->crypto_key, key, vec_len (key));
216 else if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG)
218 sa = pool_elt_at_index (im->sad, t->output_sa_index);
220 sa->integ_key_len = vec_len (key);
221 clib_memcpy (sa->integ_key, key, vec_len (key));
223 else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO)
225 sa = pool_elt_at_index (im->sad, t->input_sa_index);
226 sa->crypto_alg = alg;
227 sa->crypto_key_len = vec_len (key);
228 clib_memcpy (sa->crypto_key, key, vec_len (key));
230 else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG)
232 sa = pool_elt_at_index (im->sad, t->input_sa_index);
234 sa->integ_key_len = vec_len (key);
235 clib_memcpy (sa->integ_key, key, vec_len (key));
238 return VNET_API_ERROR_INVALID_VALUE;
245 ipsec_tunnel_if_init (vlib_main_t * vm)
247 ipsec_main_t *im = &ipsec_main;
249 im->ipsec_if_pool_index_by_key = hash_create (0, sizeof (uword));
254 VLIB_INIT_FUNCTION (ipsec_tunnel_if_init);
258 * fd.io coding-style-patch-verification: ON
261 * eval: (c-set-style "gnu")