diff options
Diffstat (limited to 'vnet/vnet/ipsec/ipsec.h')
| -rw-r--r-- | vnet/vnet/ipsec/ipsec.h | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/vnet/vnet/ipsec/ipsec.h b/vnet/vnet/ipsec/ipsec.h new file mode 100644 index 00000000000..6ef36d02855 --- /dev/null +++ b/vnet/vnet/ipsec/ipsec.h @@ -0,0 +1,292 @@ +/* + * 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/devices/dpdk/dpdk.h> + +#define foreach_ipsec_policy_action \ + _(0, BYPASS, "bypass") \ + _(1, DISCARD, "discard") \ + _(2, RESOLVE, "resolve") \ + _(3, PROTECT, "protect") + +typedef enum { +#define _(v,f,s) IPSEC_POLICY_ACTION_##f = v, + foreach_ipsec_policy_action +#undef _ + IPSEC_POLICY_N_ACTION, +} ipsec_policy_action_t; + +#define foreach_ipsec_crypto_alg \ + _(0, NONE, "none") \ + _(1, AES_CBC_128, "aes-cbc-128") \ + _(2, AES_CBC_192, "aes-cbc-192") \ + _(3, AES_CBC_256, "aes-cbc-256") + +typedef enum { +#define _(v,f,s) IPSEC_CRYPTO_ALG_##f = v, + foreach_ipsec_crypto_alg +#undef _ + IPSEC_CRYPTO_N_ALG, +} ipsec_crypto_alg_t; + +#define foreach_ipsec_integ_alg \ + _(0, NONE, "none") \ + _(1, MD5_96, "md5-96") /* RFC2403 */ \ + _(2, SHA1_96, "sha1-96") /* RFC2404 */ \ + _(3, SHA_256_96, "sha-256-96") /* draft-ietf-ipsec-ciph-sha-256-00 */ \ + _(4, SHA_256_128, "sha-256-128") /* RFC4868 */ \ + _(5, SHA_384_192, "sha-384-192") /* RFC4868 */ \ + _(6, SHA_512_256, "sha-512-256") /* RFC4868 */ + +typedef enum { +#define _(v,f,s) IPSEC_INTEG_ALG_##f = v, + foreach_ipsec_integ_alg +#undef _ + IPSEC_INTEG_N_ALG, +} ipsec_integ_alg_t; + +typedef enum { + IPSEC_PROTOCOL_AH = 0, + IPSEC_PROTOCOL_ESP = 1 +} ipsec_protocol_t; + +typedef struct { + u32 id; + u32 spi; + ipsec_protocol_t protocol; + + ipsec_crypto_alg_t crypto_alg; + u8 crypto_key_len; + u8 crypto_key[128]; + + ipsec_integ_alg_t integ_alg; + u8 integ_key_len; + u8 integ_key[128]; + + u8 use_esn; + u8 use_anti_replay; + + u8 is_tunnel; + u8 is_tunnel_ip6; + ip46_address_t tunnel_src_addr; + ip46_address_t tunnel_dst_addr; + + /* runtime */ + u32 seq; + u32 seq_hi; + u32 last_seq; + u32 last_seq_hi; + u64 replay_window; +} ipsec_sa_t; + +typedef struct { + ip46_address_t start, stop; +} ip46_address_range_t; + +typedef struct { + u16 start, stop; +} port_range_t; + +typedef struct { + u8 is_add; + u8 esn; + u8 anti_replay; + ip4_address_t local_ip, remote_ip; + u32 local_spi; + u32 remote_spi; +} ipsec_add_del_tunnel_args_t; + +typedef enum { + IPSEC_IF_SET_KEY_TYPE_NONE, + IPSEC_IF_SET_KEY_TYPE_LOCAL_CRYPTO, + IPSEC_IF_SET_KEY_TYPE_REMOTE_CRYPTO, + IPSEC_IF_SET_KEY_TYPE_LOCAL_INTEG, + IPSEC_IF_SET_KEY_TYPE_REMOTE_INTEG, +} ipsec_if_set_key_type_t; + +typedef struct { + u32 id; + i32 priority; + u8 is_outbound; + + // Selector + u8 is_ipv6; + ip46_address_range_t laddr; + ip46_address_range_t raddr; + u8 protocol; + port_range_t lport; + port_range_t rport; + + // Policy + u8 policy; + u32 sa_id; + u32 sa_index; + + // Counter + vlib_counter_t counter; +} ipsec_policy_t; + +typedef struct { + u32 id; + /* pool of policies */ + ipsec_policy_t * policies; + /* vectors of policy indices */ + u32 * ipv4_outbound_policies; + u32 * ipv6_outbound_policies; + u32 * ipv4_inbound_protect_policy_indices; + u32 * ipv4_inbound_policy_discard_and_bypass_indices; + u32 * ipv6_inbound_protect_policy_indices; + u32 * ipv6_inbound_policy_discard_and_bypass_indices; +} ipsec_spd_t; + +typedef struct { + u32 spd_index; +} ip4_ipsec_config_t; + +typedef struct { + u32 spd_index; +} ip6_ipsec_config_t; + +typedef struct { + u32 input_sa_index; + u32 output_sa_index; + u32 hw_if_index; +} ipsec_tunnel_if_t; + +typedef struct { + /* pool of tunnel instances */ + ipsec_spd_t * spds; + ipsec_sa_t * sad; + + /* pool of tunnel interfaces */ + ipsec_tunnel_if_t * tunnel_interfaces; + u32 * free_tunnel_if_indices; + + u32 * empty_buffers; + + uword * tunnel_index_by_key; + + /* convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; + + /* next node indices */ + u32 feature_next_node_index[32]; + + /* hashes */ + uword * spd_index_by_spd_id; + uword * spd_index_by_sw_if_index; + uword * sa_index_by_sa_id; + uword * ipsec_if_pool_index_by_key; + + /* node indexes */ + u32 error_drop_node_index; + u32 ip4_lookup_node_index; + u32 esp_encrypt_node_index; + +} ipsec_main_t; + +ipsec_main_t ipsec_main; + +vlib_node_registration_t ipsec_input_ip4_node; +vlib_node_registration_t ipsec_input_ip6_node; +vlib_node_registration_t ipsec_output_node; +vlib_node_registration_t esp_encrypt_node; +vlib_node_registration_t esp_decrypt_node; +vlib_node_registration_t ipsec_if_output_node; +vlib_node_registration_t ipsec_if_input_node; + + +/* + * functions + */ +int ipsec_set_interface_spd(vlib_main_t * vm, u32 sw_if_index, u32 spd_id, int is_add); +int ipsec_add_del_spd(vlib_main_t * vm, u32 spd_id, int is_add); +int ipsec_add_del_policy(vlib_main_t * vm, ipsec_policy_t * policy, int is_add); +int ipsec_add_del_sa(vlib_main_t * vm, ipsec_sa_t * new_sa, int is_add); +int ipsec_set_sa_key(vlib_main_t * vm, ipsec_sa_t * sa_update); + +u8 * format_ipsec_if_output_trace (u8 * s, va_list * args); +u8 * format_ipsec_policy_action (u8 * s, va_list * args); +u8 * format_ipsec_crypto_alg (u8 * s, va_list * args); +u8 * format_ipsec_integ_alg (u8 * s, va_list * args); +u8 * format_ipsec_replay_window(u8 * s, va_list * args); +uword unformat_ipsec_policy_action (unformat_input_t * input, va_list * args); +uword unformat_ipsec_crypto_alg (unformat_input_t * input, va_list * args); +uword unformat_ipsec_integ_alg (unformat_input_t * input, va_list * args); + +u32 ipsec_add_del_tunnel_if (vnet_main_t * vnm, ipsec_add_del_tunnel_args_t * args); +int ipsec_set_interface_key(vnet_main_t * vnm, u32 hw_if_index, ipsec_if_set_key_type_t type, u8 alg, u8 * key); + + +/* + * inline functions + */ + +always_inline void +ipsec_alloc_empty_buffers(vlib_main_t * vm, ipsec_main_t *im) +{ + dpdk_main_t * dm = &dpdk_main; + u32 free_list_index = dm->vlib_buffer_free_list_index; + + uword l = vec_len (im->empty_buffers); + uword n_alloc = 0; + + if (PREDICT_FALSE(l < VLIB_FRAME_SIZE)) + { + if (!im->empty_buffers) { + vec_alloc (im->empty_buffers, 2 * VLIB_FRAME_SIZE ); + } + + n_alloc = vlib_buffer_alloc_from_free_list (vm, im->empty_buffers + l, + 2 * VLIB_FRAME_SIZE - l, + free_list_index); + + _vec_len (im->empty_buffers) = l + n_alloc; + } +} + +static_always_inline u32 /* FIXME move to interface???.h */ +get_next_output_feature_node_index( vnet_main_t * vnm, + vlib_buffer_t * b) +{ + vlib_main_t * vm = vlib_get_main(); + vlib_node_t * node; + u32 r; + intf_output_feat_t next_feature; + + u8 * node_names[] = { +#define _(sym, str) (u8 *) str, + foreach_intf_output_feat +#undef _ + }; + + count_trailing_zeros(next_feature, vnet_buffer(b)->output_features.bitmap); + + if (next_feature >= INTF_OUTPUT_FEAT_DONE) + { + u32 sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_TX]; + vnet_hw_interface_t * hw = vnet_get_sup_hw_interface(vnm, sw_if_index); + r = hw->output_node_index; + } + else + { + vnet_buffer(b)->output_features.bitmap &= ~(1 << next_feature); + /* FIXME */ + node = vlib_get_node_by_name(vm, node_names[next_feature]); + r = node->index; + } + + return r; +} |