--- /dev/null
+/*
+ * esp_encrypt.c : IPSec ESP encrypt node using DPDK Cryptodev
+ *
+ * Copyright (c) 2016 Intel 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/devices/dpdk/ipsec/ipsec.h>
+#include <vnet/devices/dpdk/ipsec/esp.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") \
+ _(SEQ_CYCLED, "sequence number cycled") \
+ _(ENQ_FAIL, "Enqueue failed (buffer full)") \
+ _(NO_CRYPTODEV, "Cryptodev not configured") \
+ _(UNSUPPORTED, "Cipher/Auth not supported")
+
+
+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 _
+};
+
+vlib_node_registration_t dpdk_esp_encrypt_node;
+
+typedef struct
+{
+ u32 spi;
+ u32 seq;
+ ipsec_crypto_alg_t crypto_alg;
+ ipsec_integ_alg_t integ_alg;
+} esp_encrypt_trace_t;
+
+/* 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, "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
+dpdk_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, next_index;
+ ipsec_main_t *im = &ipsec_main;
+ u32 cpu_index = os_get_cpu_number ();
+ dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
+ dpdk_esp_main_t *em = &dpdk_esp_main;
+ u32 i;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ if (PREDICT_FALSE (!dcm->workers_main))
+ {
+ /* Likely there are not enough cryptodevs, so drop frame */
+ vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
+ ESP_ENCRYPT_ERROR_NO_CRYPTODEV,
+ n_left_from);
+ vlib_buffer_free (vm, from, n_left_from);
+ return n_left_from;
+ }
+
+ crypto_worker_main_t *cwm = vec_elt_at_index (dcm->workers_main, cpu_index);
+ u32 n_qps = vec_len (cwm->qp_data);
+ struct rte_crypto_op **cops_to_enq[n_qps];
+ u32 n_cop_qp[n_qps], *bi_to_enq[n_qps];
+
+ for (i = 0; i < n_qps; i++)
+ {
+ bi_to_enq[i] = cwm->qp_data[i].bi;
+ cops_to_enq[i] = cwm->qp_data[i].cops;
+ }
+
+ memset (n_cop_qp, 0, n_qps * sizeof (u32));
+
+ crypto_alloc_cops ();
+
+ next_index = ESP_ENCRYPT_NEXT_DROP;
+
+ while (n_left_from > 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;
+ ip4_and_esp_header_t *ih0, *oh0 = 0;
+ ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
+ struct rte_mbuf *mb0 = 0;
+ esp_footer_t *f0;
+ u8 is_ipv6;
+ u8 ip_hdr_size;
+ u8 next_hdr_type;
+ u8 transport_mode = 0;
+ const int BLOCK_SIZE = 16;
+ u32 iv_size;
+ u16 orig_sz;
+ crypto_sa_session_t *sa_sess;
+ void *sess;
+ struct rte_crypto_op *cop = 0;
+ u16 qp_index;
+
+ bi0 = from[0];
+ from += 1;
+ n_left_from -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
+ sa0 = pool_elt_at_index (im->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, dpdk_esp_encrypt_node.index,
+ ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
+ //TODO: rekey SA
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ goto trace;
+ }
+
+ sa_sess = pool_elt_at_index (cwm->sa_sess_d[1], sa_index0);
+ if (PREDICT_FALSE (!sa_sess->sess))
+ {
+ int ret = create_sym_sess (sa0, sa_sess, 1);
+ ASSERT (ret == 0);
+ }
+
+ qp_index = sa_sess->qp_index;
+ sess = sa_sess->sess;
+
+ ASSERT (vec_len (vec_elt (cwm->qp_data, qp_index).free_cops) > 0);
+ cop = vec_pop (vec_elt (cwm->qp_data, qp_index).free_cops);
+ ASSERT (cop->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
+
+ cops_to_enq[qp_index][0] = cop;
+ cops_to_enq[qp_index] += 1;
+ n_cop_qp[qp_index] += 1;
+ bi_to_enq[qp_index][0] = bi0;
+ bi_to_enq[qp_index] += 1;
+
+ ssize_t adv;
+ iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
+ ih0 = vlib_buffer_get_current (b0);
+ orig_sz = b0->current_length;
+ is_ipv6 = (ih0->ip4.ip_version_and_header_length & 0xF0) == 0x60;
+ /* is ipv6 */
+ if (PREDICT_TRUE (sa0->is_tunnel))
+ {
+ if (PREDICT_TRUE (!is_ipv6))
+ adv = -sizeof (ip4_and_esp_header_t);
+ else
+ adv = -sizeof (ip6_and_esp_header_t);
+ }
+ else
+ {
+ adv = -sizeof (esp_header_t);
+ if (PREDICT_TRUE (!is_ipv6))
+ orig_sz -= sizeof (ip4_header_t);
+ else
+ orig_sz -= sizeof (ip6_header_t);
+ }
+
+ /*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 - iv_size));
+ clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
+ }
+
+ vlib_buffer_advance (b0, adv - iv_size);
+
+ /* XXX IP6/ip4 and IP4/IP6 not supported, only IP4/IP4 and IP6/IP6 */
+
+ /* is ipv6 */
+ if (PREDICT_FALSE (is_ipv6))
+ {
+ ih6_0 = (ip6_and_esp_header_t *) ih0;
+ ip_hdr_size = sizeof (ip6_header_t);
+ oh6_0 = vlib_buffer_get_current (b0);
+
+ if (PREDICT_TRUE (sa0->is_tunnel))
+ {
+ next_hdr_type = IP_PROTOCOL_IPV6;
+ oh6_0->ip6.ip_version_traffic_class_and_flow_label =
+ ih6_0->ip6.ip_version_traffic_class_and_flow_label;
+ }
+ else
+ {
+ next_hdr_type = ih6_0->ip6.protocol;
+ memmove (oh6_0, ih6_0, sizeof (ip6_header_t));
+ }
+
+ oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
+ oh6_0->ip6.hop_limit = 254;
+ oh6_0->esp.spi = clib_net_to_host_u32 (sa0->spi);
+ oh6_0->esp.seq = clib_net_to_host_u32 (sa0->seq);
+ }
+ else
+ {
+ ip_hdr_size = sizeof (ip4_header_t);
+ oh0 = vlib_buffer_get_current (b0);
+
+ if (PREDICT_TRUE (sa0->is_tunnel))
+ {
+ next_hdr_type = IP_PROTOCOL_IP_IN_IP;
+ oh0->ip4.tos = ih0->ip4.tos;
+ }
+ else
+ {
+ next_hdr_type = ih0->ip4.protocol;
+ memmove (oh0, ih0, sizeof (ip4_header_t));
+ }
+
+ oh0->ip4.ip_version_and_header_length = 0x45;
+ oh0->ip4.fragment_id = 0;
+ oh0->ip4.flags_and_fragment_offset = 0;
+ oh0->ip4.ttl = 254;
+ oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
+ oh0->esp.spi = clib_net_to_host_u32 (sa0->spi);
+ oh0->esp.seq = clib_net_to_host_u32 (sa0->seq);
+ }
+
+ if (PREDICT_TRUE (sa0->is_tunnel && !sa0->is_tunnel_ip6))
+ {
+ oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
+ oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
+
+ /* in tunnel mode send it back to FIB */
+ next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ }
+ else if (sa0->is_tunnel && sa0->is_tunnel_ip6)
+ {
+ oh6_0->ip6.src_address.as_u64[0] =
+ sa0->tunnel_src_addr.ip6.as_u64[0];
+ oh6_0->ip6.src_address.as_u64[1] =
+ sa0->tunnel_src_addr.ip6.as_u64[1];
+ oh6_0->ip6.dst_address.as_u64[0] =
+ sa0->tunnel_dst_addr.ip6.as_u64[0];
+ oh6_0->ip6.dst_address.as_u64[1] =
+ sa0->tunnel_dst_addr.ip6.as_u64[1];
+
+ /* in tunnel mode send it back to FIB */
+ next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ }
+ else
+ {
+ next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
+ transport_mode = 1;
+ }
+
+ ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG);
+ ASSERT (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE);
+
+ int blocks = 1 + (orig_sz + 1) / BLOCK_SIZE;
+
+ /* pad packet in input buffer */
+ u8 pad_bytes = BLOCK_SIZE * blocks - 2 - orig_sz;
+ u8 i;
+ u8 *padding = vlib_buffer_get_current (b0) + b0->current_length;
+
+ for (i = 0; i < pad_bytes; ++i)
+ padding[i] = i + 1;
+
+ f0 = vlib_buffer_get_current (b0) + b0->current_length + pad_bytes;
+ f0->pad_length = pad_bytes;
+ f0->next_header = next_hdr_type;
+ b0->current_length += pad_bytes + 2 +
+ em->esp_integ_algs[sa0->integ_alg].trunc_size;
+
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] =
+ vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ struct rte_crypto_sym_op *sym_cop;
+ sym_cop = (struct rte_crypto_sym_op *) (cop + 1);
+
+ dpdk_cop_priv_t *priv = (dpdk_cop_priv_t *) (sym_cop + 1);
+
+ vnet_buffer (b0)->unused[0] = next0;
+
+ mb0 = rte_mbuf_from_vlib_buffer (b0);
+ mb0->data_len = b0->current_length;
+ mb0->pkt_len = b0->current_length;
+ mb0->data_off = RTE_PKTMBUF_HEADROOM + b0->current_data;
+
+ rte_crypto_op_attach_sym_session (cop, sess);
+
+ sym_cop->m_src = mb0;
+
+ dpdk_gcm_cnt_blk *icb = &priv->cb;
+ icb->salt = sa0->salt;
+ icb->iv[0] = sa0->seq;
+ icb->iv[1] = sa0->seq_hi;
+
+ if (sa0->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
+ {
+ icb->cnt = clib_host_to_net_u32 (1);
+ clib_memcpy (vlib_buffer_get_current (b0) + ip_hdr_size +
+ sizeof (esp_header_t), icb->iv, 8);
+ sym_cop->cipher.data.offset =
+ ip_hdr_size + sizeof (esp_header_t) + iv_size;
+ sym_cop->cipher.data.length = BLOCK_SIZE * blocks;
+ sym_cop->cipher.iv.length = 16;
+ }
+ else
+ {
+ sym_cop->cipher.data.offset =
+ ip_hdr_size + sizeof (esp_header_t);
+ sym_cop->cipher.data.length = BLOCK_SIZE * blocks + iv_size;
+ sym_cop->cipher.iv.length = iv_size;
+ }
+
+ sym_cop->cipher.iv.data = (u8 *) icb;
+ sym_cop->cipher.iv.phys_addr = cop->phys_addr + (uintptr_t) icb
+ - (uintptr_t) cop;
+
+
+ ASSERT (sa0->integ_alg < IPSEC_INTEG_N_ALG);
+ ASSERT (sa0->integ_alg != IPSEC_INTEG_ALG_NONE);
+
+ if (PREDICT_FALSE (sa0->integ_alg == IPSEC_INTEG_ALG_AES_GCM_128))
+ {
+ u8 *aad = priv->aad;
+ clib_memcpy (aad, vlib_buffer_get_current (b0) + ip_hdr_size,
+ 8);
+ sym_cop->auth.aad.data = aad;
+ sym_cop->auth.aad.phys_addr = cop->phys_addr +
+ (uintptr_t) aad - (uintptr_t) cop;
+
+ if (PREDICT_FALSE (sa0->use_esn))
+ {
+ *((u32 *) & aad[8]) = sa0->seq_hi;
+ sym_cop->auth.aad.length = 12;
+ }
+ else
+ {
+ sym_cop->auth.aad.length = 8;
+ }
+ }
+ else
+ {
+ sym_cop->auth.data.offset = ip_hdr_size;
+ sym_cop->auth.data.length = b0->current_length - ip_hdr_size
+ - em->esp_integ_algs[sa0->integ_alg].trunc_size;
+
+ if (PREDICT_FALSE (sa0->use_esn))
+ {
+ u8 *payload_end =
+ vlib_buffer_get_current (b0) + b0->current_length;
+ *((u32 *) payload_end) = sa0->seq_hi;
+ sym_cop->auth.data.length += sizeof (sa0->seq_hi);
+ }
+ }
+ sym_cop->auth.digest.data = vlib_buffer_get_current (b0) +
+ b0->current_length -
+ em->esp_integ_algs[sa0->integ_alg].trunc_size;
+ sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset (mb0,
+ b0->current_length
+ -
+ em->esp_integ_algs
+ [sa0->integ_alg].trunc_size);
+ sym_cop->auth.digest.length =
+ em->esp_integ_algs[sa0->integ_alg].trunc_size;
+
+
+ if (PREDICT_FALSE (is_ipv6))
+ {
+ oh6_0->ip6.payload_length =
+ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
+ sizeof (ip6_header_t));
+ }
+ else
+ {
+ oh0->ip4.length =
+ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+ oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
+ }
+
+ if (transport_mode)
+ vlib_buffer_advance (b0, -sizeof (ethernet_header_t));
+
+ trace:
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ esp_encrypt_trace_t *tr =
+ vlib_add_trace (vm, node, 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_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
+ ESP_ENCRYPT_ERROR_RX_PKTS,
+ from_frame->n_vectors);
+ crypto_qp_data_t *qpd;
+ /* *INDENT-OFF* */
+ vec_foreach_index (i, cwm->qp_data)
+ {
+ u32 enq;
+
+ qpd = vec_elt_at_index(cwm->qp_data, i);
+ enq = rte_cryptodev_enqueue_burst(qpd->dev_id, qpd->qp_id,
+ qpd->cops, n_cop_qp[i]);
+ qpd->inflights += enq;
+
+ if (PREDICT_FALSE(enq < n_cop_qp[i]))
+ {
+ crypto_free_cop (qpd, &qpd->cops[enq], n_cop_qp[i] - enq);
+ vlib_buffer_free (vm, &qpd->bi[enq], n_cop_qp[i] - enq);
+
+ vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
+ ESP_ENCRYPT_ERROR_ENQ_FAIL,
+ n_cop_qp[i] - enq);
+ }
+ }
+ /* *INDENT-ON* */
+
+ return from_frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (dpdk_esp_encrypt_node) =
+{
+ .function = dpdk_esp_encrypt_node_fn,.name = "dpdk-esp-encrypt",.flags =
+ VLIB_NODE_FLAG_IS_OUTPUT,.vector_size = sizeof (u32),.format_trace =
+ format_esp_encrypt_trace,.n_errors =
+ ARRAY_LEN (esp_encrypt_error_strings),.error_strings =
+ esp_encrypt_error_strings,.n_next_nodes = 1,.next_nodes =
+ {
+ [ESP_ENCRYPT_NEXT_DROP] = "error-drop",}
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_encrypt_node, dpdk_esp_encrypt_node_fn)
+/*
+ * ESP Encrypt Post Node
+ */
+#define foreach_esp_encrypt_post_error \
+ _(PKTS, "ESP post pkts")
+ typedef enum
+ {
+#define _(sym,str) ESP_ENCRYPT_POST_ERROR_##sym,
+ foreach_esp_encrypt_post_error
+#undef _
+ ESP_ENCRYPT_POST_N_ERROR,
+ } esp_encrypt_post_error_t;
+
+ static char *esp_encrypt_post_error_strings[] = {
+#define _(sym,string) string,
+ foreach_esp_encrypt_post_error
+#undef _
+ };
+
+vlib_node_registration_t dpdk_esp_encrypt_post_node;
+
+static u8 *
+format_esp_encrypt_post_trace (u8 * s, va_list * args)
+{
+ return s;
+}
+
+static uword
+dpdk_esp_encrypt_post_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;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 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;
+
+ bi0 = from[0];
+ from += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ to_next[0] = bi0;
+ to_next += 1;
+
+ next0 = vnet_buffer (b0)->unused[0];
+
+ 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, dpdk_esp_encrypt_post_node.index,
+ ESP_ENCRYPT_POST_ERROR_PKTS,
+ from_frame->n_vectors);
+
+ return from_frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (dpdk_esp_encrypt_post_node) =
+{
+ .function = dpdk_esp_encrypt_post_node_fn,.name =
+ "dpdk-esp-encrypt-post",.vector_size = sizeof (u32),.format_trace =
+ format_esp_encrypt_post_trace,.type = VLIB_NODE_TYPE_INTERNAL,.n_errors =
+ ARRAY_LEN (esp_encrypt_post_error_strings),.error_strings =
+ esp_encrypt_post_error_strings,.n_next_nodes =
+ ESP_ENCRYPT_N_NEXT,.next_nodes =
+ {
+#define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n,
+ foreach_esp_encrypt_next
+#undef _
+ }
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_encrypt_post_node,
+ dpdk_esp_encrypt_post_node_fn)
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff