diff options
Diffstat (limited to 'src/plugins/odp/ipsec/esp_encrypt_ipsec_api.c')
| -rw-r--r-- | src/plugins/odp/ipsec/esp_encrypt_ipsec_api.c | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/src/plugins/odp/ipsec/esp_encrypt_ipsec_api.c b/src/plugins/odp/ipsec/esp_encrypt_ipsec_api.c new file mode 100644 index 00000000..a41f2821 --- /dev/null +++ b/src/plugins/odp/ipsec/esp_encrypt_ipsec_api.c @@ -0,0 +1,305 @@ +/* + * esp_encrypt.c : IPSec ESP encrypt node + * + * 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 <odp/ipsec/ipsec.h> +#include <odp/ipsec/esp.h> +#include <odp/odp_packet.h> + +#include <assert.h> + +#define foreach_esp_encrypt_next \ +_(DROP, "error-drop") \ +_(IP4_LOOKUP, "ip4-lookup") \ +_(IP6_LOOKUP, "ip6-lookup") \ +_(INTERFACE_OUTPUT, "interface-output") + +#define _(v, s) ESP_ENCRYPT_NEXT_##v, +typedef enum +{ + foreach_esp_encrypt_next +#undef _ + ESP_ENCRYPT_N_NEXT, +} esp_encrypt_next_t; + +#define foreach_esp_encrypt_error \ + _(RX_PKTS, "ESP pkts received") \ + _(NO_BUFFER, "No buffer (packet dropped)") \ + _(DECRYPTION_FAILED, "ESP encryption failed") \ + _(SEQ_CYCLED, "sequence number cycled") + + +typedef enum +{ +#define _(sym,str) ESP_ENCRYPT_ERROR_##sym, + foreach_esp_encrypt_error +#undef _ + ESP_ENCRYPT_N_ERROR, +} esp_encrypt_error_t; + +static char *esp_encrypt_error_strings[] = { +#define _(sym,string) string, + foreach_esp_encrypt_error +#undef _ +}; + +typedef struct +{ + u32 spi; + u32 seq; + ipsec_crypto_alg_t crypto_alg; + ipsec_integ_alg_t integ_alg; +} esp_encrypt_trace_t; + +vlib_node_registration_t odp_ipsec_esp_encrypt_node; +vlib_node_registration_t odp_ipsec_esp_encrypt_post_node; + +/* packet trace format function */ +static u8 * +format_esp_encrypt_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *); + + s = format (s, "(ODP) esp: spi %u seq %u crypto %U integrity %U", + t->spi, t->seq, + format_ipsec_crypto_alg, t->crypto_alg, + format_ipsec_integ_alg, t->integ_alg); + return s; +} + + +static uword +esp_encrypt_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * from_frame) +{ + u32 n_left_from, *from, *to_next = 0, next_index; + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + ipsec_main_t *im = &ipsec_main; + odp_crypto_main_t *ocm = &odp_crypto_main; + u32 thread_index = vlib_get_thread_index (); + + ipsec_alloc_empty_buffers (vm, im); + + u32 *empty_buffers = im->empty_buffers[thread_index]; + + odp_crypto_worker_main_t *cwm = + vec_elt_at_index (ocm->workers, thread_index); + + if (PREDICT_FALSE (vec_len (empty_buffers) < n_left_from)) + { + vlib_node_increment_counter (vm, odp_ipsec_esp_encrypt_node.index, + ESP_ENCRYPT_ERROR_NO_BUFFER, n_left_from); + clib_warning ("no enough empty buffers. discarding frame"); + goto free_buffers_and_exit; + } + + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + u32 buffers_passed = 0; + + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0, next0; + vlib_buffer_t *i_b0, *o_b0; + u32 sa_index0; + ipsec_sa_t *sa0; + ip6_header_t *h6 = 0; + ethernet_header_t old_eth_hdr; + u8 transport_mode = 0; + sa_data_t *sa_sess_data; + u32 flow_label; + + bi0 = from[0]; + from += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + next0 = ESP_ENCRYPT_NEXT_DROP; + + i_b0 = vlib_get_buffer (vm, bi0); + sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index; + sa0 = pool_elt_at_index (im->sad, sa_index0); + + sa0->total_data_size += i_b0->current_length; + + old_eth_hdr = *((ethernet_header_t *) + ((u8 *) vlib_buffer_get_current (i_b0) - + sizeof (ethernet_header_t))); + + h6 = vlib_buffer_get_current (i_b0); + + flow_label = + (0xFFFFF & h6->ip_version_traffic_class_and_flow_label); + + sa_sess_data = pool_elt_at_index (cwm->sa_sess_d[1], sa_index0); + if (PREDICT_FALSE (!(sa_sess_data->is_odp_sa_present))) + { + int ret = create_odp_sa (sa0, sa_sess_data, flow_label, 1); + + if (ret) + { + to_next[0] = bi0; + to_next += 1; + goto trace; + } + } + + to_next[0] = bi0; + to_next += 1; + + + ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG); + + if (PREDICT_TRUE (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE)) + { + odp_packet_t pkt = odp_packet_from_vlib_buffer (i_b0); + odp_packet_t out_pkt; + + odp_ipsec_out_param_t oiopt; + oiopt.num_sa = 1; + oiopt.num_opt = 0; + oiopt.opt = NULL; + oiopt.sa = &sa_sess_data->odp_sa; + + odp_adjust_data_pointers (i_b0, pkt); + + odp_packet_l3_offset_set (pkt, 0); + + int processed = 1; + + int ret = odp_ipsec_out (&pkt, 1, &out_pkt, &processed, &oiopt); + + o_b0 = vlib_buffer_from_odp_packet (out_pkt); + + vnet_buffer (o_b0)->unused[0] = next0; + + if (ret < 1) + { + clib_error ("(out) IPsec packet not processed\n"); + goto trace; + } + + o_b0->current_data = + (i16) ((intptr_t) odp_packet_data (out_pkt) - + (intptr_t) o_b0->data + + (intptr_t) odp_packet_l3_offset (out_pkt)); + o_b0->current_length = odp_packet_len (out_pkt); + + + } + + if (!sa0->is_tunnel) + { + if (vnet_buffer (o_b0)->sw_if_index[VLIB_TX] != ~0) + { + transport_mode = 1; + ethernet_header_t *ieh0, *oeh0; + ieh0 = &old_eth_hdr; + oeh0 = + (ethernet_header_t *) ((uintptr_t) + vlib_buffer_get_current (o_b0) - + sizeof (ethernet_header_t)); + clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t)); + next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT; + } + } + + if (transport_mode) + { + o_b0->current_data -= sizeof (ethernet_header_t); + o_b0->current_length += sizeof (ethernet_header_t); + } + else + { + if (sa0->is_tunnel_ip6) + next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP; + else + next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP; + + vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + } + + trace: + if (PREDICT_FALSE (o_b0->flags & VLIB_BUFFER_IS_TRACED)) + { + o_b0->flags |= VLIB_BUFFER_IS_TRACED; + o_b0->trace_index = o_b0->trace_index; + esp_encrypt_trace_t *tr = + vlib_add_trace (vm, node, o_b0, sizeof (*tr)); + tr->spi = sa0->spi; + tr->seq = sa0->seq - 1; + tr->crypto_alg = sa0->crypto_alg; + tr->integ_alg = sa0->integ_alg; + } + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, bi0, + next0); + buffers_passed += 1; + + } + if (buffers_passed > 0) + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + vlib_node_increment_counter (vm, odp_ipsec_esp_encrypt_node.index, + ESP_ENCRYPT_ERROR_RX_PKTS, + from_frame->n_vectors); + +free_buffers_and_exit: + return from_frame->n_vectors; +} + + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (odp_ipsec_esp_encrypt_node) = { + .function = esp_encrypt_node_fn, + .name = "odp-ipsec-esp-encrypt", + .vector_size = sizeof (u32), + .format_trace = format_esp_encrypt_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(esp_encrypt_error_strings), + .error_strings = esp_encrypt_error_strings, + + .n_next_nodes = ESP_ENCRYPT_N_NEXT, + .next_nodes = { +#define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n, + foreach_esp_encrypt_next +#undef _ + }, +}; + +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |