diff options
Diffstat (limited to 'src/vnet/ipsec/ipsec_if.c')
| -rw-r--r-- | src/vnet/ipsec/ipsec_if.c | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/src/vnet/ipsec/ipsec_if.c b/src/vnet/ipsec/ipsec_if.c new file mode 100644 index 00000000000..a8da046f1a8 --- /dev/null +++ b/src/vnet/ipsec/ipsec_if.c @@ -0,0 +1,372 @@ +/* + * ipsec_if.c : IPSec interface support + * + * Copyright (c) 2015 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. + */ + +#include <vnet/vnet.h> +#include <vnet/api_errno.h> +#include <vnet/ip/ip.h> + +#include <vnet/ipsec/ipsec.h> +#if DPDK_CRYPTO==1 +#include <vnet/devices/dpdk/ipsec/esp.h> +#else +#include <vnet/ipsec/esp.h> +#endif + +#if DPDK_CRYPTO==0 +/* dummy function */ +static int +add_del_sa_sess (u32 sa_index, u8 is_add) +{ + return 0; +} +#endif + +void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length); + +static u8 * +format_ipsec_name (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + return format (s, "ipsec%d", dev_instance); +} + +static uword +dummy_interface_tx (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + clib_warning ("you shouldn't be here, leaking buffers..."); + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VNET_DEVICE_CLASS (ipsec_device_class, static) = +{ + .name = "IPSec", + .format_device_name = format_ipsec_name, + .format_tx_trace = format_ipsec_if_output_trace, + .tx_function = dummy_interface_tx, +}; +/* *INDENT-ON* */ + +/* *INDENT-OFF* */ +VNET_HW_INTERFACE_CLASS (ipsec_hw_class) = +{ + .name = "IPSec", + .build_rewrite = default_build_rewrite, +}; +/* *INDENT-ON* */ + +static int +ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm, + ipsec_add_del_tunnel_args_t * args); + +static int +ipsec_add_del_tunnel_if_rpc_callback (ipsec_add_del_tunnel_args_t * a) +{ + vnet_main_t *vnm = vnet_get_main (); + ASSERT (os_get_cpu_number () == 0); + + return ipsec_add_del_tunnel_if_internal (vnm, a); +} + +int +ipsec_add_del_tunnel_if (ipsec_add_del_tunnel_args_t * args) +{ + vl_api_rpc_call_main_thread (ipsec_add_del_tunnel_if_rpc_callback, + (u8 *) args, sizeof (*args)); + return 0; +} + +int +ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm, + ipsec_add_del_tunnel_args_t * args) +{ + ipsec_tunnel_if_t *t; + ipsec_main_t *im = &ipsec_main; + vnet_hw_interface_t *hi; + u32 hw_if_index = ~0; + uword *p; + ipsec_sa_t *sa; + + u64 key = (u64) args->remote_ip.as_u32 << 32 | (u64) args->remote_spi; + p = hash_get (im->ipsec_if_pool_index_by_key, key); + + if (args->is_add) + { + /* check if same src/dst pair exists */ + if (p) + return VNET_API_ERROR_INVALID_VALUE; + + pool_get_aligned (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES); + memset (t, 0, sizeof (*t)); + + pool_get (im->sad, sa); + memset (sa, 0, sizeof (*sa)); + t->input_sa_index = sa - im->sad; + sa->spi = args->remote_spi; + sa->tunnel_src_addr.ip4.as_u32 = args->remote_ip.as_u32; + sa->tunnel_dst_addr.ip4.as_u32 = args->local_ip.as_u32; + sa->is_tunnel = 1; + sa->use_esn = args->esn; + sa->use_anti_replay = args->anti_replay; + sa->integ_alg = args->integ_alg; + if (args->remote_integ_key_len <= sizeof (args->remote_integ_key)) + { + sa->integ_key_len = args->remote_integ_key_len; + clib_memcpy (sa->integ_key, args->remote_integ_key, + args->remote_integ_key_len); + } + sa->crypto_alg = args->crypto_alg; + if (args->remote_crypto_key_len <= sizeof (args->remote_crypto_key)) + { + sa->crypto_key_len = args->remote_crypto_key_len; + clib_memcpy (sa->crypto_key, args->remote_crypto_key, + args->remote_crypto_key_len); + } + + add_del_sa_sess (t->input_sa_index, args->is_add); + + pool_get (im->sad, sa); + memset (sa, 0, sizeof (*sa)); + t->output_sa_index = sa - im->sad; + sa->spi = args->local_spi; + sa->tunnel_src_addr.ip4.as_u32 = args->local_ip.as_u32; + sa->tunnel_dst_addr.ip4.as_u32 = args->remote_ip.as_u32; + sa->is_tunnel = 1; + sa->seq = 1; + sa->use_esn = args->esn; + sa->use_anti_replay = args->anti_replay; + sa->integ_alg = args->integ_alg; + if (args->local_integ_key_len <= sizeof (args->local_integ_key)) + { + sa->integ_key_len = args->local_integ_key_len; + clib_memcpy (sa->integ_key, args->local_integ_key, + args->local_integ_key_len); + } + sa->crypto_alg = args->crypto_alg; + if (args->local_crypto_key_len <= sizeof (args->local_crypto_key)) + { + sa->crypto_key_len = args->local_crypto_key_len; + clib_memcpy (sa->crypto_key, args->local_crypto_key, + args->local_crypto_key_len); + } + + add_del_sa_sess (t->output_sa_index, args->is_add); + + hash_set (im->ipsec_if_pool_index_by_key, key, + t - im->tunnel_interfaces); + + if (vec_len (im->free_tunnel_if_indices) > 0) + { + hw_if_index = + im->free_tunnel_if_indices[vec_len (im->free_tunnel_if_indices) - + 1]; + _vec_len (im->free_tunnel_if_indices) -= 1; + } + else + { + hw_if_index = + vnet_register_interface (vnm, ipsec_device_class.index, + t - im->tunnel_interfaces, + ipsec_hw_class.index, + t - im->tunnel_interfaces); + + hi = vnet_get_hw_interface (vnm, hw_if_index); + hi->output_node_index = ipsec_if_output_node.index; + } + t->hw_if_index = hw_if_index; + + /*1st interface, register protocol */ + if (pool_elts (im->tunnel_interfaces) == 1) + ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP, + ipsec_if_input_node.index); + + return hw_if_index; + } + else + { + /* check if exists */ + if (!p) + return VNET_API_ERROR_INVALID_VALUE; + + t = pool_elt_at_index (im->tunnel_interfaces, p[0]); + hi = vnet_get_hw_interface (vnm, t->hw_if_index); + vnet_sw_interface_set_flags (vnm, hi->sw_if_index, 0); /* admin down */ + vec_add1 (im->free_tunnel_if_indices, t->hw_if_index); + + /* delete input and output SA */ + sa = pool_elt_at_index (im->sad, t->input_sa_index); + + if (add_del_sa_sess (t->input_sa_index, args->is_add) < 0) + return VNET_API_ERROR_SYSCALL_ERROR_1; + + pool_put (im->sad, sa); + + sa = pool_elt_at_index (im->sad, t->output_sa_index); + + if (add_del_sa_sess (t->output_sa_index, args->is_add) < 0) + return VNET_API_ERROR_SYSCALL_ERROR_1; + + pool_put (im->sad, sa); + + hash_unset (im->ipsec_if_pool_index_by_key, key); + pool_put (im->tunnel_interfaces, t); + } + return 0; +} + +int +ipsec_add_del_ipsec_gre_tunnel (vnet_main_t * vnm, + ipsec_add_del_ipsec_gre_tunnel_args_t * args) +{ + ipsec_tunnel_if_t *t = 0; + ipsec_main_t *im = &ipsec_main; + uword *p; + ipsec_sa_t *sa; + u64 key; + u32 isa, osa; + + p = hash_get (im->sa_index_by_sa_id, args->local_sa_id); + if (!p) + return VNET_API_ERROR_INVALID_VALUE; + isa = p[0]; + + p = hash_get (im->sa_index_by_sa_id, args->remote_sa_id); + if (!p) + return VNET_API_ERROR_INVALID_VALUE; + osa = p[0]; + sa = pool_elt_at_index (im->sad, p[0]); + + if (sa->is_tunnel) + key = (u64) sa->tunnel_dst_addr.ip4.as_u32 << 32 | (u64) sa->spi; + else + key = (u64) args->remote_ip.as_u32 << 32 | (u64) sa->spi; + + p = hash_get (im->ipsec_if_pool_index_by_key, key); + + if (args->is_add) + { + /* check if same src/dst pair exists */ + if (p) + return VNET_API_ERROR_INVALID_VALUE; + + pool_get_aligned (im->tunnel_interfaces, t, CLIB_CACHE_LINE_BYTES); + memset (t, 0, sizeof (*t)); + + t->input_sa_index = isa; + t->output_sa_index = osa; + t->hw_if_index = ~0; + hash_set (im->ipsec_if_pool_index_by_key, key, + t - im->tunnel_interfaces); + + /*1st interface, register protocol */ + if (pool_elts (im->tunnel_interfaces) == 1) + ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP, + ipsec_if_input_node.index); + } + else + { + /* check if exists */ + if (!p) + return VNET_API_ERROR_INVALID_VALUE; + + t = pool_elt_at_index (im->tunnel_interfaces, p[0]); + hash_unset (im->ipsec_if_pool_index_by_key, key); + pool_put (im->tunnel_interfaces, t); + } + return 0; +} + +int +ipsec_set_interface_key (vnet_main_t * vnm, u32 hw_if_index, + ipsec_if_set_key_type_t type, u8 alg, u8 * key) +{ + ipsec_main_t *im = &ipsec_main; + vnet_hw_interface_t *hi; + ipsec_tunnel_if_t *t; + ipsec_sa_t *sa; + + hi = vnet_get_hw_interface (vnm, hw_if_index); + t = pool_elt_at_index (im->tunnel_interfaces, hi->dev_instance); + + if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO) + { + sa = pool_elt_at_index (im->sad, t->output_sa_index); + sa->crypto_alg = alg; + sa->crypto_key_len = vec_len (key); + clib_memcpy (sa->crypto_key, key, vec_len (key)); + + if (add_del_sa_sess (t->input_sa_index, 0) < 0) + return VNET_API_ERROR_SYSCALL_ERROR_1; + } + else if (type == IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG) + { + sa = pool_elt_at_index (im->sad, t->output_sa_index); + sa->integ_alg = alg; + sa->integ_key_len = vec_len (key); + clib_memcpy (sa->integ_key, key, vec_len (key)); + + if (add_del_sa_sess (t->output_sa_index, 0) < 0) + return VNET_API_ERROR_SYSCALL_ERROR_1; + } + else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO) + { + sa = pool_elt_at_index (im->sad, t->input_sa_index); + sa->crypto_alg = alg; + sa->crypto_key_len = vec_len (key); + clib_memcpy (sa->crypto_key, key, vec_len (key)); + + if (add_del_sa_sess (t->input_sa_index, 0) < 0) + return VNET_API_ERROR_SYSCALL_ERROR_1; + } + else if (type == IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG) + { + sa = pool_elt_at_index (im->sad, t->input_sa_index); + sa->integ_alg = alg; + sa->integ_key_len = vec_len (key); + clib_memcpy (sa->integ_key, key, vec_len (key)); + + if (add_del_sa_sess (t->output_sa_index, 0) < 0) + return VNET_API_ERROR_SYSCALL_ERROR_1; + } + else + return VNET_API_ERROR_INVALID_VALUE; + + return 0; +} + + +clib_error_t * +ipsec_tunnel_if_init (vlib_main_t * vm) +{ + ipsec_main_t *im = &ipsec_main; + + im->ipsec_if_pool_index_by_key = hash_create (0, sizeof (uword)); + + return 0; +} + +VLIB_INIT_FUNCTION (ipsec_tunnel_if_init); + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |