--- /dev/null
+/*
+ * esp_decrypt.c : IPSec ESP Decrypt 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_decrypt_next \
+_(DROP, "error-drop") \
+_(IP4_INPUT, "ip4-input") \
+_(IP6_INPUT, "ip6-input")
+
+#define _(v, s) ESP_DECRYPT_NEXT_##v,
+typedef enum {
+ foreach_esp_decrypt_next
+#undef _
+ ESP_DECRYPT_N_NEXT,
+} esp_decrypt_next_t;
+
+#define foreach_esp_decrypt_error \
+ _(RX_PKTS, "ESP pkts received") \
+ _(DECRYPTION_FAILED, "ESP decryption failed") \
+ _(REPLAY, "SA replayed packet") \
+ _(NOT_IP, "Not IP packet (dropped)") \
+ _(ENQ_FAIL, "Enqueue failed (buffer full)") \
+ _(NO_CRYPTODEV, "Cryptodev not configured") \
+ _(BAD_LEN, "Invalid ciphertext length") \
+ _(UNSUPPORTED, "Cipher/Auth not supported")
+
+
+typedef enum {
+#define _(sym,str) ESP_DECRYPT_ERROR_##sym,
+ foreach_esp_decrypt_error
+#undef _
+ ESP_DECRYPT_N_ERROR,
+} esp_decrypt_error_t;
+
+static char * esp_decrypt_error_strings[] = {
+#define _(sym,string) string,
+ foreach_esp_decrypt_error
+#undef _
+};
+
+vlib_node_registration_t dpdk_esp_decrypt_node;
+
+typedef struct {
+ ipsec_crypto_alg_t crypto_alg;
+ ipsec_integ_alg_t integ_alg;
+} esp_decrypt_trace_t;
+
+/* packet trace format function */
+static u8 * format_esp_decrypt_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_decrypt_trace_t * t = va_arg (*args, esp_decrypt_trace_t *);
+
+ s = format (s, "esp: crypto %U integrity %U",
+ format_ipsec_crypto_alg, t->crypto_alg,
+ format_ipsec_integ_alg, t->integ_alg);
+ return s;
+}
+
+static uword
+dpdk_esp_decrypt_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))
+ {
+ vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
+ ESP_DECRYPT_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_DECRYPT_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, sa_index0 = ~0, seq, icv_size, iv_size;
+ vlib_buffer_t * b0;
+ esp_header_t * esp0;
+ ipsec_sa_t * sa0;
+ struct rte_mbuf * mb0 = 0;
+ const int BLOCK_SIZE = 16;
+ crypto_sa_session_t * sa_sess;
+ void * sess;
+ u16 qp_index;
+ struct rte_crypto_op * cop = 0;
+
+ bi0 = from[0];
+ from += 1;
+ n_left_from -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ esp0 = vlib_buffer_get_current (b0);
+
+ sa_index0 = vnet_buffer(b0)->ipsec.sad_index;
+ sa0 = pool_elt_at_index (im->sad, sa_index0);
+
+ seq = clib_host_to_net_u32(esp0->seq);
+
+ /* anti-replay check */
+ if (sa0->use_anti_replay)
+ {
+ int rv = 0;
+
+ if (PREDICT_TRUE(sa0->use_esn))
+ rv = esp_replay_check_esn(sa0, seq);
+ else
+ rv = esp_replay_check(sa0, seq);
+
+ if (PREDICT_FALSE(rv))
+ {
+ clib_warning ("anti-replay SPI %u seq %u", sa0->spi, seq);
+ vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
+ ESP_DECRYPT_ERROR_REPLAY, 1);
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ goto trace;
+ }
+ }
+
+ if (PREDICT_FALSE(sa0->integ_alg == IPSEC_INTEG_ALG_NONE) ||
+ PREDICT_FALSE(sa0->crypto_alg == IPSEC_CRYPTO_ALG_NONE))
+ {
+ clib_warning ("SPI %u : only cipher + auth supported", sa0->spi);
+ vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
+ ESP_DECRYPT_ERROR_UNSUPPORTED, 1);
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ goto trace;
+ }
+
+ sa_sess = pool_elt_at_index(cwm->sa_sess_d[0], sa_index0);
+
+ if (PREDICT_FALSE(!sa_sess->sess))
+ {
+ int ret = create_sym_sess(sa0, sa_sess, 0);
+ ASSERT(ret == 0);
+ }
+
+ sess = sa_sess->sess;
+ qp_index = sa_sess->qp_index;
+
+ 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;
+
+ rte_crypto_op_attach_sym_session(cop, sess);
+
+ icv_size = em->esp_integ_algs[sa0->integ_alg].trunc_size;
+ iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
+
+ /* Convert vlib buffer to mbuf */
+ 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;
+
+ /* Outer IP header has already been stripped */
+ u16 payload_len = rte_pktmbuf_pkt_len(mb0) - sizeof (esp_header_t) -
+ iv_size - icv_size;
+
+ if ((payload_len & (BLOCK_SIZE - 1)) || (payload_len <= 0))
+ {
+ clib_warning ("payload %u not multiple of %d\n",
+ payload_len, BLOCK_SIZE);
+ vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
+ ESP_DECRYPT_ERROR_BAD_LEN, 1);
+ vec_add (vec_elt (cwm->qp_data, qp_index).free_cops, &cop, 1);
+ bi_to_enq[qp_index] -= 1;
+ cops_to_enq[qp_index] -= 1;
+ n_cop_qp[qp_index] -= 1;
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ goto trace;
+ }
+
+ struct rte_crypto_sym_op *sym_cop = (struct rte_crypto_sym_op *)(cop + 1);
+
+ sym_cop->m_src = mb0;
+ sym_cop->cipher.data.offset = sizeof (esp_header_t) + iv_size;
+ sym_cop->cipher.data.length = payload_len;
+
+ u8 *iv = rte_pktmbuf_mtod_offset(mb0, void*, sizeof (esp_header_t));
+ dpdk_cop_priv_t * priv = (dpdk_cop_priv_t *)(sym_cop + 1);
+
+ if (sa0->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
+ {
+ dpdk_gcm_cnt_blk *icb = &priv->cb;
+ icb->salt = sa0->salt;
+ clib_memcpy(icb->iv, iv, 8);
+ icb->cnt = clib_host_to_net_u32(1);
+ sym_cop->cipher.iv.data = (u8 *)icb;
+ sym_cop->cipher.iv.phys_addr = cop->phys_addr +
+ (uintptr_t)icb - (uintptr_t)cop;
+ sym_cop->cipher.iv.length = 16;
+
+ u8 *aad = priv->aad;
+ clib_memcpy(aad, iv - sizeof(esp_header_t), 8);
+ sym_cop->auth.aad.data = aad;
+ sym_cop->auth.aad.phys_addr = cop->phys_addr +
+ (uintptr_t)aad - (uintptr_t)cop;
+ if (sa0->use_esn)
+ {
+ *((u32*)&aad[8]) = sa0->seq_hi;
+ sym_cop->auth.aad.length = 12;
+ }
+ else
+ {
+ sym_cop->auth.aad.length = 8;
+ }
+
+ sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(mb0, void*,
+ rte_pktmbuf_pkt_len(mb0) - icv_size);
+ sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
+ rte_pktmbuf_pkt_len(mb0) - icv_size);
+ sym_cop->auth.digest.length = icv_size;
+
+ }
+ else
+ {
+ sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(mb0, void*,
+ sizeof (esp_header_t));
+ sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
+ sizeof (esp_header_t));
+ sym_cop->cipher.iv.length = iv_size;
+
+ if (sa0->use_esn)
+ {
+ dpdk_cop_priv_t* priv = (dpdk_cop_priv_t*) (sym_cop + 1);
+ u8* payload_end = rte_pktmbuf_mtod_offset(
+ mb0, u8*, sizeof(esp_header_t) + iv_size + payload_len);
+
+ clib_memcpy (priv->icv, payload_end, icv_size);
+ *((u32*) payload_end) = sa0->seq_hi;
+ sym_cop->auth.data.offset = 0;
+ sym_cop->auth.data.length = sizeof(esp_header_t) + iv_size
+ + payload_len + sizeof(sa0->seq_hi);
+ sym_cop->auth.digest.data = priv->icv;
+ sym_cop->auth.digest.phys_addr = cop->phys_addr
+ + (uintptr_t) priv->icv - (uintptr_t) cop;
+ sym_cop->auth.digest.length = icv_size;
+ }
+ else
+ {
+ sym_cop->auth.data.offset = 0;
+ sym_cop->auth.data.length = sizeof(esp_header_t) +
+ iv_size + payload_len;
+
+ sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(mb0, void*,
+ rte_pktmbuf_pkt_len(mb0) - icv_size);
+ sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
+ rte_pktmbuf_pkt_len(mb0) - icv_size);
+ sym_cop->auth.digest.length = icv_size;
+ }
+ }
+
+trace:
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ esp_decrypt_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ 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_decrypt_node.index,
+ ESP_DECRYPT_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_decrypt_node.index,
+ ESP_DECRYPT_ERROR_ENQ_FAIL,
+ n_cop_qp[i] - enq);
+ }
+ }
+ /* *INDENT-ON* */
+
+ return from_frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (dpdk_esp_decrypt_node) = {
+ .function = dpdk_esp_decrypt_node_fn,
+ .name = "dpdk-esp-decrypt",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
+ .error_strings = esp_decrypt_error_strings,
+
+ .n_next_nodes = ESP_DECRYPT_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
+ foreach_esp_decrypt_next
+#undef _
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_decrypt_node, dpdk_esp_decrypt_node_fn)
+
+/*
+ * Decrypt Post Node
+ */
+
+#define foreach_esp_decrypt_post_error \
+ _(PKTS, "ESP post pkts")
+
+typedef enum {
+#define _(sym,str) ESP_DECRYPT_POST_ERROR_##sym,
+ foreach_esp_decrypt_post_error
+#undef _
+ ESP_DECRYPT_POST_N_ERROR,
+} esp_decrypt_post_error_t;
+
+static char * esp_decrypt_post_error_strings[] = {
+#define _(sym,string) string,
+ foreach_esp_decrypt_post_error
+#undef _
+};
+
+vlib_node_registration_t dpdk_esp_decrypt_post_node;
+
+static u8 * format_esp_decrypt_post_trace (u8 * s, va_list * args)
+{
+ return s;
+}
+
+static uword
+dpdk_esp_decrypt_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;
+ ipsec_sa_t * sa0;
+ u32 sa_index0 = ~0;
+ ipsec_main_t *im = &ipsec_main;
+ dpdk_esp_main_t *em = &dpdk_esp_main;
+
+ 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)
+ {
+ esp_footer_t * f0;
+ u32 bi0, next0, icv_size, iv_size;
+ vlib_buffer_t * b0 = 0;
+ ip4_header_t *ih4 = 0, *oh4 = 0;
+ ip6_header_t *ih6 = 0, *oh6 = 0;
+ u8 tunnel_mode = 1;
+ u8 transport_ip6 = 0;
+
+ next0 = ESP_DECRYPT_NEXT_DROP;
+
+ bi0 = from[0];
+ from += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ sa_index0 = vnet_buffer(b0)->ipsec.sad_index;
+ sa0 = pool_elt_at_index (im->sad, sa_index0);
+
+ to_next[0] = bi0;
+ to_next += 1;
+
+ icv_size = em->esp_integ_algs[sa0->integ_alg].trunc_size;
+ iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
+
+ if (sa0->use_anti_replay)
+ {
+ esp_header_t * esp0 = vlib_buffer_get_current (b0);
+ u32 seq;
+ seq = clib_host_to_net_u32(esp0->seq);
+ if (PREDICT_TRUE(sa0->use_esn))
+ esp_replay_advance_esn(sa0, seq);
+ else
+ esp_replay_advance(sa0, seq);
+ }
+
+ ih4 = (ip4_header_t *) (b0->data + sizeof(ethernet_header_t));
+ vlib_buffer_advance (b0, sizeof (esp_header_t) + iv_size);
+
+ b0->current_length -= (icv_size + 2);
+ b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ f0 = (esp_footer_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ b0->current_length);
+ b0->current_length -= f0->pad_length;
+
+ /* transport mode */
+ if (PREDICT_FALSE(!sa0->is_tunnel && !sa0->is_tunnel_ip6))
+ {
+ tunnel_mode = 0;
+
+ if (PREDICT_TRUE((ih4->ip_version_and_header_length & 0xF0) != 0x40))
+ {
+ if (PREDICT_TRUE((ih4->ip_version_and_header_length & 0xF0) == 0x60))
+ transport_ip6 = 1;
+ else
+ {
+ clib_warning("next header: 0x%x", f0->next_header);
+ vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
+ ESP_DECRYPT_ERROR_NOT_IP, 1);
+ goto trace;
+ }
+ }
+ }
+
+ if (PREDICT_TRUE (tunnel_mode))
+ {
+ if (PREDICT_TRUE(f0->next_header == IP_PROTOCOL_IP_IN_IP))
+ next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
+ else if (f0->next_header == IP_PROTOCOL_IPV6)
+ next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
+ else
+ {
+ clib_warning("next header: 0x%x", f0->next_header);
+ vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
+ ESP_DECRYPT_ERROR_DECRYPTION_FAILED,
+ 1);
+ goto trace;
+ }
+ }
+ /* transport mode */
+ else
+ {
+ if (PREDICT_FALSE(transport_ip6))
+ {
+ ih6 = (ip6_header_t *) (b0->data + sizeof(ethernet_header_t));
+ vlib_buffer_advance (b0, -sizeof(ip6_header_t));
+ oh6 = vlib_buffer_get_current (b0);
+ memmove(oh6, ih6, sizeof(ip6_header_t));
+
+ next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
+ oh6->protocol = f0->next_header;
+ oh6->payload_length =
+ clib_host_to_net_u16 (
+ vlib_buffer_length_in_chain(vm, b0) -
+ sizeof (ip6_header_t));
+ }
+ else
+ {
+ vlib_buffer_advance (b0, -sizeof(ip4_header_t));
+ oh4 = vlib_buffer_get_current (b0);
+ memmove(oh4, ih4, sizeof(ip4_header_t));
+
+ next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
+ oh4->ip_version_and_header_length = 0x45;
+ oh4->fragment_id = 0;
+ oh4->flags_and_fragment_offset = 0;
+ oh4->protocol = f0->next_header;
+ oh4->length = clib_host_to_net_u16 (
+ vlib_buffer_length_in_chain (vm, b0));
+ oh4->checksum = ip4_header_checksum (oh4);
+ }
+ }
+
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32)~0;
+
+trace:
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ esp_decrypt_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ 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);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+ vlib_node_increment_counter (vm, dpdk_esp_decrypt_post_node.index,
+ ESP_DECRYPT_POST_ERROR_PKTS,
+ from_frame->n_vectors);
+
+ return from_frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (dpdk_esp_decrypt_post_node) = {
+ .function = dpdk_esp_decrypt_post_node_fn,
+ .name = "dpdk-esp-decrypt-post",
+ .vector_size = sizeof (u32),
+ .format_trace = format_esp_decrypt_post_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(esp_decrypt_post_error_strings),
+ .error_strings = esp_decrypt_post_error_strings,
+
+ .n_next_nodes = ESP_DECRYPT_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
+ foreach_esp_decrypt_next
+#undef _
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_decrypt_post_node, dpdk_esp_decrypt_post_node_fn)
Code Review / vpp.git / blobdiff