--- /dev/null
+/*
+ * 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/ipsec/ipsec.h>
+#include <vnet/ipsec/ipsec_sa.h>
+
+#define foreach_ipsec_handoff_error \
+_(CONGESTION_DROP, "congestion drop")
+
+typedef enum
+{
+#define _(sym,str) IPSEC_HANDOFF_ERROR_##sym,
+ foreach_ipsec_handoff_error
+#undef _
+ NAT44_HANDOFF_N_ERROR,
+} ipsec_handoff_error_t;
+
+static char *ipsec_handoff_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ipsec_handoff_error
+#undef _
+};
+
+typedef struct ipsec_handoff_trace_t_
+{
+ u32 next_worker_index;
+} ipsec_handoff_trace_t;
+
+static u8 *
+format_ipsec_handoff_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 *);
+ ipsec_handoff_trace_t *t = va_arg (*args, ipsec_handoff_trace_t *);
+
+ s = format (s, "next-worker %d", t->next_worker_index);
+
+ return s;
+}
+
+/* do worker handoff based on thread_index in NAT HA protcol header */
+static_always_inline uword
+ipsec_handoff (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, u32 fq_index, bool is_enc)
+{
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u16 thread_indices[VLIB_FRAME_SIZE], *ti;
+ u32 n_enq, n_left_from, *from;
+ ipsec_main_t *im;
+
+ im = &ipsec_main;
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ b = bufs;
+ ti = thread_indices;
+
+ while (n_left_from >= 4)
+ {
+ ipsec_sa_t *sa0, *sa1, *sa2, *sa3;
+ u32 sai0, sai1, sai2, sai3;
+
+ /* Prefetch next iteration. */
+ if (n_left_from >= 12)
+ {
+ vlib_prefetch_buffer_header (b[8], LOAD);
+ vlib_prefetch_buffer_header (b[9], LOAD);
+ vlib_prefetch_buffer_header (b[10], LOAD);
+ vlib_prefetch_buffer_header (b[11], LOAD);
+
+ vlib_prefetch_buffer_data (b[4], LOAD);
+ vlib_prefetch_buffer_data (b[5], LOAD);
+ vlib_prefetch_buffer_data (b[6], LOAD);
+ vlib_prefetch_buffer_data (b[7], LOAD);
+ }
+
+ sai0 = vnet_buffer (b[0])->ipsec.sad_index;
+ sai1 = vnet_buffer (b[1])->ipsec.sad_index;
+ sai2 = vnet_buffer (b[2])->ipsec.sad_index;
+ sai3 = vnet_buffer (b[3])->ipsec.sad_index;
+ sa0 = pool_elt_at_index (im->sad, sai0);
+ sa1 = pool_elt_at_index (im->sad, sai1);
+ sa2 = pool_elt_at_index (im->sad, sai2);
+ sa3 = pool_elt_at_index (im->sad, sai3);
+
+ if (is_enc)
+ {
+ ti[0] = sa0->encrypt_thread_index;
+ ti[1] = sa1->encrypt_thread_index;
+ ti[2] = sa2->encrypt_thread_index;
+ ti[3] = sa3->encrypt_thread_index;
+ }
+ else
+ {
+ ti[0] = sa0->decrypt_thread_index;
+ ti[1] = sa1->decrypt_thread_index;
+ ti[2] = sa2->decrypt_thread_index;
+ ti[3] = sa3->decrypt_thread_index;
+ }
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ {
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipsec_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next_worker_index = ti[0];
+ }
+ if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipsec_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[1], sizeof (*t));
+ t->next_worker_index = ti[1];
+ }
+ if (PREDICT_FALSE (b[2]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipsec_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[2], sizeof (*t));
+ t->next_worker_index = ti[2];
+ }
+ if (PREDICT_FALSE (b[3]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipsec_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[3], sizeof (*t));
+ t->next_worker_index = ti[3];
+ }
+ }
+
+ n_left_from -= 4;
+ ti += 4;
+ b += 4;
+ }
+ while (n_left_from > 0)
+ {
+ ipsec_sa_t *sa0;
+ u32 sai0;
+
+ sai0 = vnet_buffer (b[0])->ipsec.sad_index;
+ sa0 = pool_elt_at_index (im->sad, sai0);
+
+ if (is_enc)
+ ti[0] = sa0->encrypt_thread_index;
+ else
+ ti[0] = sa0->decrypt_thread_index;
+
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipsec_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next_worker_index = ti[0];
+ }
+
+ n_left_from -= 1;
+ ti += 1;
+ b += 1;
+ }
+
+ n_enq = vlib_buffer_enqueue_to_thread (vm, fq_index, from,
+ thread_indices, frame->n_vectors, 1);
+
+ if (n_enq < frame->n_vectors)
+ vlib_node_increment_counter (vm, node->node_index,
+ IPSEC_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
+
+ return n_enq;
+}
+
+VLIB_NODE_FN (esp4_encrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp4_enc_fq_index, true);
+}
+
+VLIB_NODE_FN (esp6_encrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp6_enc_fq_index, true);
+}
+
+VLIB_NODE_FN (esp4_encrypt_tun_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp4_enc_tun_fq_index,
+ true);
+}
+
+VLIB_NODE_FN (esp6_encrypt_tun_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp6_enc_tun_fq_index,
+ true);
+}
+
+VLIB_NODE_FN (esp4_decrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp4_dec_fq_index, false);
+}
+
+VLIB_NODE_FN (esp6_decrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp6_dec_fq_index, false);
+}
+
+VLIB_NODE_FN (esp4_decrypt_tun_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp4_dec_tun_fq_index,
+ false);
+}
+
+VLIB_NODE_FN (esp6_decrypt_tun_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->esp6_dec_tun_fq_index,
+ false);
+}
+
+VLIB_NODE_FN (ah4_encrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->ah4_enc_fq_index, true);
+}
+
+VLIB_NODE_FN (ah6_encrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->ah6_enc_fq_index, true);
+}
+
+VLIB_NODE_FN (ah4_decrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->ah4_dec_fq_index, false);
+}
+
+VLIB_NODE_FN (ah6_decrypt_handoff) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ ipsec_main_t *im = &ipsec_main;
+
+ return ipsec_handoff (vm, node, from_frame, im->ah6_dec_fq_index, false);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp4_encrypt_handoff) = {
+ .name = "esp4-encrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (esp6_encrypt_handoff) = {
+ .name = "esp6-encrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (esp4_encrypt_tun_handoff) = {
+ .name = "esp4-encrypt-tun-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (esp6_encrypt_tun_handoff) = {
+ .name = "esp6-encrypt-tun-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (esp4_decrypt_handoff) = {
+ .name = "esp4-decrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (esp6_decrypt_handoff) = {
+ .name = "esp6-decrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (esp4_decrypt_tun_handoff) = {
+ .name = "esp4-decrypt-tun-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (esp6_decrypt_tun_handoff) = {
+ .name = "esp6-decrypt-tun-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (ah4_encrypt_handoff) = {
+ .name = "ah4-encrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (ah6_encrypt_handoff) = {
+ .name = "ah6-encrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (ah4_decrypt_handoff) = {
+ .name = "ah4-decrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+VLIB_REGISTER_NODE (ah6_decrypt_handoff) = {
+ .name = "ah6-decrypt-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ipsec_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(ipsec_handoff_error_strings),
+ .error_strings = ipsec_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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