diff options
Diffstat (limited to 'src/plugins/ipsecmb/ah_encrypt.c')
| -rw-r--r-- | src/plugins/ipsecmb/ah_encrypt.c | 466 |
1 files changed, 0 insertions, 466 deletions
diff --git a/src/plugins/ipsecmb/ah_encrypt.c b/src/plugins/ipsecmb/ah_encrypt.c deleted file mode 100644 index 927deae188f..00000000000 --- a/src/plugins/ipsecmb/ah_encrypt.c +++ /dev/null @@ -1,466 +0,0 @@ -/* - * ah_encrypt.c : ipsecmb AH 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 <vnet/ipsec/ipsec.h> -#include <vnet/ipsec/esp.h> -#include <vnet/ipsec/ah.h> - -#include <ipsecmb/ipsecmb.h> - -#define foreach_ah_encrypt_next \ -_(DROP, "error-drop") \ -_(IP4_LOOKUP, "ip4-lookup") \ -_(IP6_LOOKUP, "ip6-lookup") \ -_(INTERFACE_OUTPUT, "interface-output") - -#define _(v, s) AH_ENCRYPT_NEXT_##v, -typedef enum -{ - foreach_ah_encrypt_next -#undef _ - AH_ENCRYPT_N_NEXT, -} ah_encrypt_next_t; - -#define foreach_ah_encrypt_error \ - _(RX_PKTS, "AH pkts received") \ - _(SEQ_CYCLED, "sequence number cycled") - - -typedef enum -{ -#define _(sym,str) AH_ENCRYPT_ERROR_##sym, - foreach_ah_encrypt_error -#undef _ - AH_ENCRYPT_N_ERROR, -} ah_encrypt_error_t; - -static char *ah_encrypt_error_strings[] = { -#define _(sym,string) string, - foreach_ah_encrypt_error -#undef _ -}; - -typedef struct -{ - u32 spi; - u32 seq; - ipsec_integ_alg_t integ_alg; -} ah_encrypt_trace_t; - -/* packet trace format function */ -static u8 * -format_ah_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 *); - ah_encrypt_trace_t *t = va_arg (*args, ah_encrypt_trace_t *); - - s = format (s, "ah: spi %u seq %u integrity %U", - t->spi, t->seq, format_ipsec_integ_alg, t->integ_alg); - return s; -} - -#ifdef CLIB_MARCH_VARIANT -always_inline void -ah_finish_encrypt (vlib_main_t * vm, vlib_buffer_t * b0, ipsec_sa_t * sa0, - int is_ip6) -{ - if (is_ip6) - { - ip6_header_t *oh6 = 0; - oh6 = vlib_buffer_get_current (b0); - oh6->ip_version_traffic_class_and_flow_label = - vnet_buffer (b0)->ipsec.ip_version_traffic_class_and_flow_label; - oh6->hop_limit = vnet_buffer (b0)->ipsec.ttl_or_hop_limit; - } - else - { - ip4_header_t *oh4 = 0; - oh4 = vlib_buffer_get_current (b0); - oh4->ttl = vnet_buffer (b0)->ipsec.ttl_or_hop_limit; - oh4->tos = vnet_buffer (b0)->ipsec.tos; - oh4->checksum = ip4_header_checksum (oh4); - } -} - -always_inline uword -ah_encrypt_ipsecmb_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame, int is_ip6) -{ - u32 n_left_from, *from, *to_next = 0, next_index; - int icv_size = 0; - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; - ipsec_main_t *im = &ipsec_main; - ipsecmb_main_t *imbm = &ipsecmb_main; - ipsec_proto_main_t *em = &ipsec_proto_main; - next_index = node->cached_next_index; - u32 thread_index = vlib_get_thread_index (); - MB_MGR *mgr = imbm->mb_mgr[thread_index]; - u32 packets_in_flight = 0; - - while (n_left_from > 0 || packets_in_flight > 0) - { - u32 n_left_to_next; - - 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 *b0 = 0; - u32 sa_index0; - ipsec_sa_t *sa0; - ipsecmb_sa_t *samb0; - ip4_header_t *ih4, *oh4 = 0; - ip6_header_t *ih6, *oh6 = 0; - ah_header_t *ah = 0; - u8 next_hdr_type; - u8 transport_mode = 0; - - bi0 = from[0]; - from += 1; - n_left_from -= 1; - - next0 = AH_ENCRYPT_NEXT_DROP; - - b0 = vlib_get_buffer (vm, bi0); - sa_index0 = vnet_buffer (b0)->ipsec.sad_index; - sa0 = pool_elt_at_index (im->sad, sa_index0); - samb0 = pool_elt_at_index (imbm->sad, sa_index0); - - if (PREDICT_FALSE (esp_seq_advance (sa0))) - { - clib_warning ("sequence number counter has cycled SPI %u", - sa0->spi); - vlib_node_increment_counter (vm, node->node_index, - AH_ENCRYPT_ERROR_SEQ_CYCLED, 1); - to_next[0] = bi0; - to_next += 1; - goto trace; - } - - - sa0->total_data_size += b0->current_length; - - ssize_t adv; - ih4 = vlib_buffer_get_current (b0); - - if (PREDICT_TRUE (sa0->is_tunnel)) - { - if (!is_ip6) - adv = -sizeof (ip4_and_ah_header_t); - else - adv = -sizeof (ip6_and_ah_header_t); - } - else - { - adv = -sizeof (ah_header_t); - } - - const u8 padding_len = ah_calc_icv_padding_len (icv_size, is_ip6); - adv -= padding_len; - - icv_size = - em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size; - /* transport mode save the eth header before it is overwritten */ - if (PREDICT_FALSE (!sa0->is_tunnel)) - { - ethernet_header_t *ieh0 = (ethernet_header_t *) - ((u8 *) vlib_buffer_get_current (b0) - - sizeof (ethernet_header_t)); - ethernet_header_t *oeh0 = - (ethernet_header_t *) ((u8 *) ieh0 + (adv - icv_size)); - clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t)); - } - - vlib_buffer_advance (b0, adv - icv_size); - - if (is_ip6) - { - ih6 = (ip6_header_t *) ih4; - oh6 = vlib_buffer_get_current (b0); - ah = (ah_header_t *) (oh6 + 1); - vnet_buffer (b0)->ipsec.ttl_or_hop_limit = ih6->hop_limit; - vnet_buffer (b0)-> - ipsec.ip_version_traffic_class_and_flow_label = - ih6->ip_version_traffic_class_and_flow_label; - - if (PREDICT_TRUE (sa0->is_tunnel)) - { - next_hdr_type = IP_PROTOCOL_IPV6; - } - else - { - next_hdr_type = ih6->protocol; - memmove (oh6, ih6, sizeof (ip6_header_t)); - } - - oh6->protocol = IP_PROTOCOL_IPSEC_AH; - oh6->ip_version_traffic_class_and_flow_label = 0x60; - oh6->hop_limit = 0; - ah->reserved = 0; - ah->nexthdr = next_hdr_type; - ah->spi = clib_net_to_host_u32 (sa0->spi); - ah->seq_no = clib_net_to_host_u32 (sa0->seq); - ah->hdrlen = - (sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2; - oh6->payload_length = - clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) - - sizeof (ip6_header_t)); - } - else - { - oh4 = vlib_buffer_get_current (b0); - memset (oh4, 0, sizeof (*oh4)); - ah = (ah_header_t *) (oh4 + 1); - memset (ah, 0, sizeof (*ah)); - vnet_buffer (b0)->ipsec.ttl_or_hop_limit = ih4->ttl; - vnet_buffer (b0)->ipsec.tos = ih4->tos; - - if (PREDICT_TRUE (sa0->is_tunnel)) - { - next_hdr_type = IP_PROTOCOL_IP_IN_IP; - } - else - { - next_hdr_type = ih4->protocol; - memmove (oh4, ih4, sizeof (ip4_header_t)); - } - - oh4->length = - clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0)); - oh4->ip_version_and_header_length = 0x45; - oh4->fragment_id = 0; - oh4->flags_and_fragment_offset = 0; - oh4->ttl = 0; - oh4->tos = 0; - oh4->protocol = IP_PROTOCOL_IPSEC_AH; - ah->spi = clib_net_to_host_u32 (sa0->spi); - ah->seq_no = clib_net_to_host_u32 (sa0->seq); - oh4->checksum = 0; - ah->nexthdr = next_hdr_type; - ah->hdrlen = - (sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2; - } - - if (PREDICT_TRUE (!is_ip6 && sa0->is_tunnel && !sa0->is_tunnel_ip6)) - { - oh4->src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32; - oh4->dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32; - - next0 = AH_ENCRYPT_NEXT_IP4_LOOKUP; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - } - else if (is_ip6 && sa0->is_tunnel && sa0->is_tunnel_ip6) - { - oh6->src_address.as_u64[0] = sa0->tunnel_src_addr.ip6.as_u64[0]; - oh6->src_address.as_u64[1] = sa0->tunnel_src_addr.ip6.as_u64[1]; - oh6->dst_address.as_u64[0] = sa0->tunnel_dst_addr.ip6.as_u64[0]; - oh6->dst_address.as_u64[1] = sa0->tunnel_dst_addr.ip6.as_u64[1]; - next0 = AH_ENCRYPT_NEXT_IP6_LOOKUP; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - } - else - { - transport_mode = 1; - } - - memset (ah + 1, 0, icv_size); - - JOB_AES_HMAC *job = IPSECMB_FUNC (get_next_job) (mgr); - job->src = vlib_buffer_get_current (b0); - job->hash_start_src_offset_in_bytes = 0; - job->cipher_mode = NULL_CIPHER; - job->hash_alg = imbm->integ_algs[sa0->integ_alg].hash_alg; - job->auth_tag_output_len_in_bytes = - imbm->integ_algs[sa0->integ_alg].hash_output_length; - job->auth_tag_output = (u8 *) (ah + 1); - if (PREDICT_TRUE (sa0->use_esn)) - { - *(u32 *) (vlib_buffer_get_current (b0) + b0->current_length) = - sa0->seq_hi; - b0->current_length += sizeof (u32); - } - job->msg_len_to_hash_in_bytes = b0->current_length; - job->cipher_direction = ENCRYPT; - job->chain_order = HASH_CIPHER; - job->u.HMAC._hashed_auth_key_xor_ipad = samb0->ipad_hash; - job->u.HMAC._hashed_auth_key_xor_opad = samb0->opad_hash; - - - job->user_data = (void *) (uintptr_t) bi0; - job->user_data2 = (void *) (uintptr_t) next0; - vnet_buffer (b0)->ipsec.sad_index = sa_index0; - - job = IPSECMB_FUNC (submit_job) (mgr); - ++packets_in_flight; - - if (!job) - { - continue; - } - - --packets_in_flight; - ASSERT (STS_COMPLETED == job->status); - bi0 = (uintptr_t) job->user_data; - next0 = (uintptr_t) job->user_data2; - b0 = vlib_get_buffer (vm, bi0); - sa0 = - pool_elt_at_index (im->sad, vnet_buffer (b0)->ipsec.sad_index); - ah_finish_encrypt (vm, b0, sa0, is_ip6); - if (!sa0->is_tunnel && !sa0->is_tunnel_ip6) - { - next0 = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT; - vlib_buffer_advance (b0, -sizeof (ethernet_header_t)); - } - - to_next[0] = bi0; - to_next += 1; - n_left_to_next -= 1; - - trace: - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - ah_encrypt_trace_t *tr = - vlib_add_trace (vm, node, b0, sizeof (*tr)); - tr->spi = sa0->spi; - tr->seq = sa0->seq - 1; - tr->integ_alg = sa0->integ_alg; - } - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, bi0, - next0); - } - - if (PREDICT_FALSE (n_left_from == 0)) - { - JOB_AES_HMAC *job = NULL; - while (n_left_to_next > 0 && (job = IPSECMB_FUNC (flush_job) (mgr))) - { - --packets_in_flight; - u32 bi0, next0; - vlib_buffer_t *b0; - ipsec_sa_t *sa0; - - ASSERT (STS_COMPLETED == job->status); - bi0 = (uintptr_t) job->user_data; - next0 = (uintptr_t) job->user_data2; - b0 = vlib_get_buffer (vm, bi0); - sa0 = - pool_elt_at_index (im->sad, - vnet_buffer (b0)->ipsec.sad_index); - ah_finish_encrypt (vm, b0, sa0, is_ip6); - if (!sa0->is_tunnel && !sa0->is_tunnel_ip6) - { - next0 = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT; - vlib_buffer_advance (b0, -sizeof (ethernet_header_t)); - } - - to_next[0] = bi0; - to_next += 1; - n_left_to_next -= 1; - - if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - ah_encrypt_trace_t *tr = - vlib_add_trace (vm, node, b0, sizeof (*tr)); - tr->spi = sa0->spi; - tr->seq = sa0->seq - 1; - tr->integ_alg = sa0->integ_alg; - } - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, bi0, - next0); - } - } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - vlib_node_increment_counter (vm, node->node_index, AH_ENCRYPT_ERROR_RX_PKTS, - from_frame->n_vectors); - - return from_frame->n_vectors; -} - -VLIB_NODE_FN (ah4_encrypt_ipsecmb_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return ah_encrypt_ipsecmb_inline (vm, node, from_frame, 0 /*is_ip6 */ ); -} - -VLIB_NODE_FN (ah6_encrypt_ipsecmb_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - return ah_encrypt_ipsecmb_inline (vm, node, from_frame, 1 /*is_ip6 */ ); -} - -#endif - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ah4_encrypt_ipsecmb_node) = { - .name = "ah4-encrypt-ipsecmb", - .vector_size = sizeof (u32), - .format_trace = format_ah_encrypt_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(ah_encrypt_error_strings), - .error_strings = ah_encrypt_error_strings, - - .n_next_nodes = AH_ENCRYPT_N_NEXT, - .next_nodes = { -#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n, - foreach_ah_encrypt_next -#undef _ - }, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ah6_encrypt_ipsecmb_node) = { - .name = "ah6-encrypt-ipsecmb", - .vector_size = sizeof (u32), - .format_trace = format_ah_encrypt_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(ah_encrypt_error_strings), - .error_strings = ah_encrypt_error_strings, - - .n_next_nodes = AH_ENCRYPT_N_NEXT, - .next_nodes = { -#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n, - foreach_ah_encrypt_next -#undef _ - }, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |