#include <vnet/ip/ip.h>
#include <vnet/udp/udp.h>
+#include <vnet/crypto/crypto.h>
+
#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/esp.h>
-ipsec_proto_main_t ipsec_proto_main;
-
#define foreach_esp_encrypt_next \
_(DROP, "error-drop") \
_(IP4_LOOKUP, "ip4-lookup") \
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")
-
+#define foreach_esp_encrypt_error \
+ _(RX_PKTS, "ESP pkts received") \
+ _(SEQ_CYCLED, "sequence number cycled (packet dropped)") \
+ _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
+ _(CHAINED_BUFFER, "chained buffers (packet dropped)") \
+ _(NO_TRAILER_SPACE, "no trailer space (packet dropped)")
typedef enum
{
#undef _
};
-vlib_node_registration_t esp_encrypt_node;
-
typedef struct
{
+ u32 sa_index;
u32 spi;
u32 seq;
u8 udp_encap;
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%s",
- t->spi, t->seq,
+ s = format (s, "esp: sa-index %d spi %u seq %u crypto %U integrity %U%s",
+ t->sa_index, t->spi, t->seq,
format_ipsec_crypto_alg, t->crypto_alg,
format_ipsec_integ_alg, t->integ_alg,
t->udp_encap ? " udp-encap-enabled" : "");
return s;
}
-always_inline void
-esp_encrypt_cbc (vlib_main_t * vm, ipsec_crypto_alg_t alg,
- u8 * in, u8 * out, size_t in_len, u8 * key, u8 * iv)
+/* pad packet in input buffer */
+static_always_inline u8 *
+esp_add_footer_and_icv (vlib_buffer_t * b, u8 block_size, u8 icv_sz)
{
- ipsec_proto_main_t *em = &ipsec_proto_main;
- u32 thread_index = vm->thread_index;
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
- EVP_CIPHER_CTX *ctx = em->per_thread_data[thread_index].encrypt_ctx;
+ static const u8 pad_data[ESP_MAX_BLOCK_SIZE] = {
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x00, 0x00,
+ };
+
+ u16 min_length = b->current_length + sizeof (esp_footer_t);
+ u16 new_length = round_pow2 (min_length, block_size);
+ u8 pad_bytes = new_length - min_length;
+ esp_footer_t *f = (esp_footer_t *) (vlib_buffer_get_current (b) +
+ new_length - sizeof (esp_footer_t));
+
+ if (pad_bytes)
+ clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, ESP_MAX_BLOCK_SIZE);
+
+ f->pad_length = pad_bytes;
+ b->current_length = new_length + icv_sz;
+ return &f->next_header;
+}
+
+static_always_inline void
+esp_update_ip4_hdr (ip4_header_t * ip4, u16 len, int is_transport, int is_udp)
+{
+ ip_csum_t sum = ip4->checksum;
+ u16 old_len = 0;
+
+ if (is_transport)
+ {
+ u8 prot = is_udp ? IP_PROTOCOL_UDP : IP_PROTOCOL_IPSEC_ESP;
+ old_len = ip4->length;
+ sum = ip_csum_update (sum, ip4->protocol, prot, ip4_header_t, protocol);
+ ip4->protocol = prot;
+ }
+
+ ip4->length = len = clib_net_to_host_u16 (len);
+ sum = ip_csum_update (ip4->checksum, old_len, len, ip4_header_t, length);
+ ip4->checksum = ip_csum_fold (sum);
+}
+
+static_always_inline void
+esp_fill_udp_hdr (ipsec_sa_t * sa, udp_header_t * udp, u16 len)
+{
+ clib_memcpy_fast (udp, &sa->udp_hdr, sizeof (udp_header_t));
+ udp->length = clib_net_to_host_u16 (len);
+}
+
+static_always_inline u8
+ext_hdr_is_pre_esp (u8 nexthdr)
+{
+#ifdef CLIB_HAVE_VEC128
+ static const u8x16 ext_hdr_types = {
+ IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS,
+ IP_PROTOCOL_IPV6_ROUTE,
+ IP_PROTOCOL_IPV6_FRAGMENTATION,
+ };
+
+ return !u8x16_is_all_zero (ext_hdr_types == u8x16_splat (nexthdr));
#else
- EVP_CIPHER_CTX *ctx = &(em->per_thread_data[thread_index].encrypt_ctx);
+ return ((nexthdr ^ IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS) |
+ (nexthdr ^ IP_PROTOCOL_IPV6_ROUTE) |
+ (nexthdr ^ IP_PROTOCOL_IPV6_FRAGMENTATION) != 0);
#endif
- const EVP_CIPHER *cipher = NULL;
- int out_len;
+}
- ASSERT (alg < IPSEC_CRYPTO_N_ALG);
+static_always_inline u8
+esp_get_ip6_hdr_len (ip6_header_t * ip6)
+{
+ /* this code assumes that HbH, route and frag headers will be before
+ others, if that is not the case, they will end up encrypted */
- if (PREDICT_FALSE
- (em->ipsec_proto_main_crypto_algs[alg].type == IPSEC_CRYPTO_ALG_NONE))
- return;
+ u8 len = sizeof (ip6_header_t);
+ ip6_ext_header_t *p;
+
+ /* if next packet doesn't have ext header */
+ if (ext_hdr_is_pre_esp (ip6->protocol) == 0)
+ return len;
+
+ p = (void *) (ip6 + 1);
+ len += ip6_ext_header_len (p);
- if (PREDICT_FALSE
- (alg != em->per_thread_data[thread_index].last_encrypt_alg))
+ while (ext_hdr_is_pre_esp (p->next_hdr))
{
- cipher = em->ipsec_proto_main_crypto_algs[alg].type;
- em->per_thread_data[thread_index].last_encrypt_alg = alg;
+ len += ip6_ext_header_len (p);
+ p = ip6_ext_next_header (p);
}
- EVP_EncryptInit_ex (ctx, cipher, NULL, key, iv);
+ return len;
+}
+
+static_always_inline int
+esp_trailer_icv_overflow (vlib_node_runtime_t * node, vlib_buffer_t * b,
+ u16 * next, u16 buffer_data_size)
+{
+ if (b->current_data + b->current_length <= buffer_data_size)
+ return 0;
- EVP_EncryptUpdate (ctx, out, &out_len, in, in_len);
- EVP_EncryptFinal_ex (ctx, out + out_len, &out_len);
+ b->current_length -= buffer_data_size - b->current_data;
+ b->error = node->errors[ESP_ENCRYPT_ERROR_NO_TRAILER_SPACE];
+ next[0] = ESP_ENCRYPT_NEXT_DROP;
+ return 1;
}
-static uword
-esp_encrypt_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+static_always_inline void
+esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts)
{
- 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;
- ipsec_proto_main_t *em = &ipsec_proto_main;
- u32 *recycle = 0;
- u32 thread_index = vm->thread_index;
+ u32 n_fail, n_ops = vec_len (ops);
+ vnet_crypto_op_t *op = ops;
- ipsec_alloc_empty_buffers (vm, im);
+ if (n_ops == 0)
+ return;
- u32 *empty_buffers = im->empty_buffers[thread_index];
+ n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
- if (PREDICT_FALSE (vec_len (empty_buffers) < n_left_from))
+ while (n_fail)
{
- vlib_node_increment_counter (vm, 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;
+ ASSERT (op - ops < n_ops);
+
+ if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
+ {
+ u32 bi = op->user_data;
+ b[bi]->error = node->errors[ESP_ENCRYPT_ERROR_CRYPTO_ENGINE_ERROR];
+ nexts[bi] = ESP_ENCRYPT_NEXT_DROP;
+ n_fail--;
+ }
+ op++;
}
+}
- next_index = node->cached_next_index;
+always_inline uword
+esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_ip6, int is_tun)
+{
+ ipsec_main_t *im = &ipsec_main;
+ ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, vm->thread_index);
+ u32 *from = vlib_frame_vector_args (frame);
+ u32 n_left = frame->n_vectors;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ u32 thread_index = vm->thread_index;
+ u16 buffer_data_size = vlib_buffer_get_default_data_size (vm);
+ u32 current_sa_index = ~0, current_sa_packets = 0;
+ u32 current_sa_bytes = 0, spi = 0;
+ u8 block_sz = 0, iv_sz = 0, icv_sz = 0;
+ ipsec_sa_t *sa0 = 0;
+
+ vlib_get_buffers (vm, from, b, n_left);
+ vec_reset_length (ptd->crypto_ops);
+ vec_reset_length (ptd->integ_ops);
- while (n_left_from > 0)
+ while (n_left > 0)
{
- u32 n_left_to_next;
+ u32 sa_index0 = vnet_buffer (b[0])->ipsec.sad_index;
+ dpo_id_t *dpo;
+ esp_header_t *esp;
+ u8 *payload, *next_hdr_ptr;
+ u16 payload_len;
+ u32 hdr_len;
+
+ if (n_left > 2)
+ {
+ u8 *p;
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ p = vlib_buffer_get_current (b[1]);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+ p -= CLIB_CACHE_LINE_BYTES;
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ if (is_tun)
+ {
+ /* we are on a ipsec tunnel's feature arc */
+ u32 next0;
+ sa_index0 = *(u32 *) vnet_feature_next_with_data (&next0, b[0],
+ sizeof
+ (sa_index0));
+ next[0] = next0;
+ }
+ else
+ sa_index0 = vnet_buffer (b[0])->ipsec.sad_index;
- while (n_left_from > 0 && n_left_to_next > 0)
+ if (sa_index0 != current_sa_index)
{
- u32 i_bi0, o_bi0, next0;
- vlib_buffer_t *i_b0, *o_b0 = 0;
- u32 sa_index0;
- ipsec_sa_t *sa0;
- ip4_and_esp_header_t *oh0 = 0;
- ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
- ip4_and_udp_and_esp_header_t *iuh0, *ouh0 = 0;
- uword last_empty_buffer;
- esp_header_t *o_esp0;
- esp_footer_t *f0;
- u8 is_ipv6;
- u8 ip_udp_hdr_size;
- u8 next_hdr_type;
- u32 ip_proto = 0;
- u8 transport_mode = 0;
-
- i_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, i_bi0);
- sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index;
sa0 = pool_elt_at_index (im->sad, sa_index0);
+ current_sa_index = sa_index0;
+ vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
+ sa_index0, current_sa_packets,
+ current_sa_bytes);
+ current_sa_packets = current_sa_bytes = 0;
+ spi = clib_net_to_host_u32 (sa0->spi);
+ block_sz = sa0->crypto_block_size;
+ icv_sz = sa0->integ_icv_size;
+ iv_sz = sa0->crypto_iv_size;
+ }
+
+ if (vlib_buffer_chain_linearize (vm, b[0]) != 1)
+ {
+ b[0]->error = node->errors[ESP_ENCRYPT_ERROR_CHAINED_BUFFER];
+ next[0] = ESP_ENCRYPT_NEXT_DROP;
+ goto trace;
+ }
+
+ if (PREDICT_FALSE (esp_seq_advance (sa0)))
+ {
+ b[0]->error = node->errors[ESP_ENCRYPT_ERROR_SEQ_CYCLED];
+ next[0] = ESP_ENCRYPT_NEXT_DROP;
+ goto trace;
+ }
+
+ /* space for IV */
+ hdr_len = iv_sz;
- if (PREDICT_FALSE (esp_seq_advance (sa0)))
+ if (ipsec_sa_is_set_IS_TUNNEL (sa0))
+ {
+ payload = vlib_buffer_get_current (b[0]);
+ next_hdr_ptr = esp_add_footer_and_icv (b[0], block_sz, icv_sz);
+ payload_len = b[0]->current_length;
+
+ if (esp_trailer_icv_overflow (node, b[0], next, buffer_data_size))
+ goto trace;
+
+ /* ESP header */
+ hdr_len += sizeof (*esp);
+ esp = (esp_header_t *) (payload - hdr_len);
+
+ /* optional UDP header */
+ if (ipsec_sa_is_set_UDP_ENCAP (sa0))
{
- clib_warning ("sequence number counter has cycled SPI %u",
- sa0->spi);
- vlib_node_increment_counter (vm, esp_encrypt_node.index,
- ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
- //TODO: rekey SA
- o_bi0 = i_bi0;
- to_next[0] = o_bi0;
- to_next += 1;
- goto trace;
+ hdr_len += sizeof (udp_header_t);
+ esp_fill_udp_hdr (sa0, (udp_header_t *) (payload - hdr_len),
+ payload_len + hdr_len);
}
- sa0->total_data_size += i_b0->current_length;
-
- /* grab free buffer */
- last_empty_buffer = vec_len (empty_buffers) - 1;
- o_bi0 = empty_buffers[last_empty_buffer];
- o_b0 = vlib_get_buffer (vm, o_bi0);
- o_b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
- o_b0->current_data = sizeof (ethernet_header_t);
- iuh0 = vlib_buffer_get_current (i_b0);
- vlib_prefetch_buffer_with_index (vm,
- empty_buffers[last_empty_buffer -
- 1], STORE);
- _vec_len (empty_buffers) = last_empty_buffer;
- to_next[0] = o_bi0;
- to_next += 1;
-
- /* add old buffer to the recycle list */
- vec_add1 (recycle, i_bi0);
-
- /* is ipv6 */
- if (PREDICT_FALSE
- ((iuh0->ip4.ip_version_and_header_length & 0xF0) == 0x60))
+ /* IP header */
+ if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
{
- is_ipv6 = 1;
- ih6_0 = vlib_buffer_get_current (i_b0);
- next_hdr_type = IP_PROTOCOL_IPV6;
- oh6_0 = vlib_buffer_get_current (o_b0);
-
- oh6_0->ip6.ip_version_traffic_class_and_flow_label =
- ih6_0->ip6.ip_version_traffic_class_and_flow_label;
- oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
- ip_udp_hdr_size = sizeof (ip6_header_t);
- o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size;
- oh6_0->ip6.hop_limit = 254;
- oh6_0->ip6.src_address.as_u64[0] =
- ih6_0->ip6.src_address.as_u64[0];
- oh6_0->ip6.src_address.as_u64[1] =
- ih6_0->ip6.src_address.as_u64[1];
- oh6_0->ip6.dst_address.as_u64[0] =
- ih6_0->ip6.dst_address.as_u64[0];
- oh6_0->ip6.dst_address.as_u64[1] =
- ih6_0->ip6.dst_address.as_u64[1];
- o_esp0->spi = clib_net_to_host_u32 (sa0->spi);
- o_esp0->seq = clib_net_to_host_u32 (sa0->seq);
- ip_proto = ih6_0->ip6.protocol;
-
- next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
+ ip6_header_t *ip6;
+ u16 len = sizeof (ip6_header_t);
+ hdr_len += len;
+ ip6 = (ip6_header_t *) (payload - hdr_len);
+ clib_memcpy_fast (ip6, &sa0->ip6_hdr, len);
+ *next_hdr_ptr = (is_ip6 ?
+ IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
+ len = payload_len + hdr_len - len;
+ ip6->payload_length = clib_net_to_host_u16 (len);
}
else
{
- is_ipv6 = 0;
- next_hdr_type = IP_PROTOCOL_IP_IN_IP;
- oh0 = vlib_buffer_get_current (o_b0);
- ouh0 = vlib_buffer_get_current (o_b0);
-
- oh0->ip4.ip_version_and_header_length = 0x45;
- oh0->ip4.tos = iuh0->ip4.tos;
- oh0->ip4.fragment_id = 0;
- oh0->ip4.flags_and_fragment_offset = 0;
- oh0->ip4.ttl = 254;
- if (sa0->udp_encap)
- {
- ouh0->udp.src_port =
- clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
- ouh0->udp.dst_port =
- clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
- ouh0->udp.checksum = 0;
- ouh0->ip4.protocol = IP_PROTOCOL_UDP;
- ip_udp_hdr_size =
- sizeof (udp_header_t) + sizeof (ip4_header_t);
- }
- else
- {
- oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
- ip_udp_hdr_size = sizeof (ip4_header_t);
- }
- o_esp0 = vlib_buffer_get_current (o_b0) + ip_udp_hdr_size;
- oh0->ip4.src_address.as_u32 = iuh0->ip4.src_address.as_u32;
- oh0->ip4.dst_address.as_u32 = iuh0->ip4.dst_address.as_u32;
- o_esp0->spi = clib_net_to_host_u32 (sa0->spi);
- o_esp0->seq = clib_net_to_host_u32 (sa0->seq);
- ip_proto = iuh0->ip4.protocol;
-
- next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
+ ip4_header_t *ip4;
+ u16 len = sizeof (ip4_header_t);
+ hdr_len += len;
+ ip4 = (ip4_header_t *) (payload - hdr_len);
+ clib_memcpy_fast (ip4, &sa0->ip4_hdr, len);
+ *next_hdr_ptr = (is_ip6 ?
+ IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
+ len = payload_len + hdr_len;
+ esp_update_ip4_hdr (ip4, len, /* is_transport */ 0, 0);
}
- if (PREDICT_TRUE
- (!is_ipv6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
+ dpo = sa0->dpo + IPSEC_PROTOCOL_ESP;
+ if (!is_tun)
{
- 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;
-
- vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- }
- else if (is_ipv6 && 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];
-
- vnet_buffer (o_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- }
- else
- {
- next_hdr_type = ip_proto;
- if (vnet_buffer (i_b0)->sw_if_index[VLIB_TX] != ~0)
- {
- transport_mode = 1;
- ethernet_header_t *ieh0, *oeh0;
- ieh0 =
- (ethernet_header_t *) ((u8 *)
- vlib_buffer_get_current (i_b0) -
- sizeof (ethernet_header_t));
- oeh0 = (ethernet_header_t *) o_b0->data;
- clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
- next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
- vnet_buffer (o_b0)->sw_if_index[VLIB_TX] =
- vnet_buffer (i_b0)->sw_if_index[VLIB_TX];
- }
- vlib_buffer_advance (i_b0, ip_udp_hdr_size);
+ next[0] = dpo->dpoi_next_node;
+ vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
}
+ }
+ else /* transport mode */
+ {
+ u8 *l2_hdr, l2_len, *ip_hdr, ip_len;
+ udp_header_t *udp = 0;
+ u8 *old_ip_hdr = vlib_buffer_get_current (b[0]);
- ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG);
+ ip_len = is_ip6 ?
+ esp_get_ip6_hdr_len ((ip6_header_t *) old_ip_hdr) :
+ ip4_header_bytes ((ip4_header_t *) old_ip_hdr);
- if (PREDICT_TRUE (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE))
- {
+ vlib_buffer_advance (b[0], ip_len);
+ payload = vlib_buffer_get_current (b[0]);
+ next_hdr_ptr = esp_add_footer_and_icv (b[0], block_sz, icv_sz);
+ payload_len = b[0]->current_length;
- const int BLOCK_SIZE =
- em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].block_size;
- const int IV_SIZE =
- em->ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size;
- int blocks = 1 + (i_b0->current_length + 1) / BLOCK_SIZE;
-
- /* pad packet in input buffer */
- u8 pad_bytes = BLOCK_SIZE * blocks - 2 - i_b0->current_length;
- u8 i;
- u8 *padding =
- vlib_buffer_get_current (i_b0) + i_b0->current_length;
- i_b0->current_length = BLOCK_SIZE * blocks;
- for (i = 0; i < pad_bytes; ++i)
- {
- padding[i] = i + 1;
- }
- f0 = vlib_buffer_get_current (i_b0) + i_b0->current_length - 2;
- f0->pad_length = pad_bytes;
- f0->next_header = next_hdr_type;
-
- o_b0->current_length = ip_udp_hdr_size + sizeof (esp_header_t) +
- BLOCK_SIZE * blocks + IV_SIZE;
-
- vnet_buffer (o_b0)->sw_if_index[VLIB_RX] =
- vnet_buffer (i_b0)->sw_if_index[VLIB_RX];
-
- u8 iv[em->
- ipsec_proto_main_crypto_algs[sa0->crypto_alg].iv_size];
- RAND_bytes (iv, sizeof (iv));
-
- clib_memcpy ((u8 *) vlib_buffer_get_current (o_b0) +
- ip_udp_hdr_size + sizeof (esp_header_t), iv,
- em->ipsec_proto_main_crypto_algs[sa0->
- crypto_alg].iv_size);
-
- esp_encrypt_cbc (vm, sa0->crypto_alg,
- (u8 *) vlib_buffer_get_current (i_b0),
- (u8 *) vlib_buffer_get_current (o_b0) +
- ip_udp_hdr_size + sizeof (esp_header_t) +
- IV_SIZE, BLOCK_SIZE * blocks,
- sa0->crypto_key, iv);
+ if (esp_trailer_icv_overflow (node, b[0], next, buffer_data_size))
+ goto trace;
+
+ /* ESP header */
+ hdr_len += sizeof (*esp);
+ esp = (esp_header_t *) (payload - hdr_len);
+
+ /* optional UDP header */
+ if (ipsec_sa_is_set_UDP_ENCAP (sa0))
+ {
+ hdr_len += sizeof (udp_header_t);
+ udp = (udp_header_t *) (payload - hdr_len);
}
- o_b0->current_length += hmac_calc (sa0->integ_alg, sa0->integ_key,
- sa0->integ_key_len,
- (u8 *) o_esp0,
- o_b0->current_length -
- ip_udp_hdr_size,
- vlib_buffer_get_current (o_b0) +
- o_b0->current_length,
- sa0->use_esn, sa0->seq_hi);
+ /* IP header */
+ hdr_len += ip_len;
+ ip_hdr = payload - hdr_len;
+ /* L2 header */
+ l2_len = vnet_buffer (b[0])->ip.save_rewrite_length;
+ hdr_len += l2_len;
+ l2_hdr = payload - hdr_len;
- if (PREDICT_FALSE (is_ipv6))
+ /* copy l2 and ip header */
+ clib_memcpy_le32 (l2_hdr, old_ip_hdr - l2_len, l2_len);
+ clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len);
+
+ if (is_ip6)
{
- oh6_0->ip6.payload_length =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0) -
- sizeof (ip6_header_t));
+ ip6_header_t *ip6 = (ip6_header_t *) (ip_hdr);
+ *next_hdr_ptr = ip6->protocol;
+ ip6->protocol = IP_PROTOCOL_IPSEC_ESP;
+ ip6->payload_length = payload_len + hdr_len - l2_len - ip_len;
}
else
{
- oh0->ip4.length =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, o_b0));
- oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
- if (sa0->udp_encap)
+ u16 len;
+ ip4_header_t *ip4 = (ip4_header_t *) (ip_hdr);
+ *next_hdr_ptr = ip4->protocol;
+ len = payload_len + hdr_len + l2_len;
+ if (udp)
{
- ouh0->udp.length =
- clib_host_to_net_u16 (clib_net_to_host_u16
- (oh0->ip4.length) -
- ip4_header_bytes (&oh0->ip4));
+ esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 1);
+ esp_fill_udp_hdr (sa0, udp, len - ip_len);
}
+ else
+ esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 0);
}
- if (transport_mode)
- vlib_buffer_reset (o_b0);
+ next[0] = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
+ }
+
+ esp->spi = spi;
+ esp->seq = clib_net_to_host_u32 (sa0->seq);
- trace:
- if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED))
+ if (sa0->crypto_enc_op_id)
+ {
+ vnet_crypto_op_t *op;
+ vec_add2_aligned (ptd->crypto_ops, op, 1, CLIB_CACHE_LINE_BYTES);
+ vnet_crypto_op_init (op, sa0->crypto_enc_op_id);
+ op->iv = payload - iv_sz;
+ op->src = op->dst = payload;
+ op->key = sa0->crypto_key.data;
+ op->len = payload_len - icv_sz;
+ op->flags = VNET_CRYPTO_OP_FLAG_INIT_IV;
+ op->user_data = b - bufs;
+ op->salt = sa0->salt;
+
+ if (ipsec_sa_is_set_IS_AEAD (sa0))
{
- if (o_b0)
- {
- o_b0->flags |= VLIB_BUFFER_IS_TRACED;
- o_b0->trace_index = i_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->udp_encap = sa0->udp_encap;
- tr->crypto_alg = sa0->crypto_alg;
- tr->integ_alg = sa0->integ_alg;
- }
+ /*
+ * construct the AAD in a scratch space in front
+ * of the IP header.
+ */
+ op->aad = payload - hdr_len - sizeof (esp_aead_t);
+
+ esp_aad_fill (op, esp, sa0);
+
+ op->tag = payload + op->len;
+ op->tag_len = 16;
+ }
+ }
+
+ if (sa0->integ_op_id)
+ {
+ vnet_crypto_op_t *op;
+ vec_add2_aligned (ptd->integ_ops, op, 1, CLIB_CACHE_LINE_BYTES);
+ vnet_crypto_op_init (op, sa0->integ_op_id);
+ op->src = payload - iv_sz - sizeof (esp_header_t);
+ op->digest = payload + payload_len - icv_sz;
+ op->key = sa0->integ_key.data;
+ op->key_len = sa0->integ_key.len;
+ op->digest_len = icv_sz;
+ op->len = payload_len - icv_sz + iv_sz + sizeof (esp_header_t);
+ op->user_data = b - bufs;
+ if (ipsec_sa_is_set_USE_ESN (sa0))
+ {
+ u32 seq_hi = clib_net_to_host_u32 (sa0->seq_hi);
+ clib_memcpy_fast (op->digest, &seq_hi, sizeof (seq_hi));
+ op->len += sizeof (seq_hi);
}
+ }
+
+ vlib_buffer_advance (b[0], 0LL - hdr_len);
+
+ current_sa_packets += 1;
+ current_sa_bytes += payload_len;
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next, o_bi0,
- next0);
+ trace:
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ esp_encrypt_trace_t *tr = vlib_add_trace (vm, node, b[0],
+ sizeof (*tr));
+ tr->sa_index = sa_index0;
+ tr->spi = sa0->spi;
+ tr->seq = sa0->seq - 1;
+ tr->udp_encap = ipsec_sa_is_set_UDP_ENCAP (sa0);
+ tr->crypto_alg = sa0->crypto_alg;
+ tr->integ_alg = sa0->integ_alg;
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ /* next */
+ n_left -= 1;
+ next += 1;
+ b += 1;
}
- vlib_node_increment_counter (vm, esp_encrypt_node.index,
- ESP_ENCRYPT_ERROR_RX_PKTS,
- from_frame->n_vectors);
-
-free_buffers_and_exit:
- if (recycle)
- vlib_buffer_free (vm, recycle, vec_len (recycle));
- vec_free (recycle);
- return from_frame->n_vectors;
+
+ vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
+ current_sa_index, current_sa_packets,
+ current_sa_bytes);
+ esp_process_ops (vm, node, ptd->crypto_ops, bufs, nexts);
+ esp_process_ops (vm, node, ptd->integ_ops, bufs, nexts);
+
+ vlib_node_increment_counter (vm, node->node_index,
+ ESP_ENCRYPT_ERROR_RX_PKTS, frame->n_vectors);
+
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+ return frame->n_vectors;
+}
+
+VLIB_NODE_FN (esp4_encrypt_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 0);
}
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp4_encrypt_node) = {
+ .name = "esp4-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* */
+
+VLIB_NODE_FN (esp6_encrypt_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 0);
+}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (esp_encrypt_node) = {
- .function = esp_encrypt_node_fn,
- .name = "esp-encrypt",
+VLIB_REGISTER_NODE (esp6_encrypt_node) = {
+ .name = "esp6-encrypt",
.vector_size = sizeof (u32),
.format_trace = format_esp_encrypt_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
};
/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (esp_encrypt_node, esp_encrypt_node_fn)
+VLIB_NODE_FN (esp4_encrypt_tun_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ , 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp4_encrypt_tun_node) = {
+ .name = "esp4-encrypt-tun",
+ .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 = 1,
+ .next_nodes = {
+ [ESP_ENCRYPT_NEXT_DROP] = "ip4-drop",
+ },
+};
+
+VNET_FEATURE_INIT (esp4_encrypt_tun_feat_node, static) =
+{
+ .arc_name = "ip4-output",
+ .node_name = "esp4-encrypt-tun",
+ .runs_before = VNET_FEATURES ("adj-midchain-tx"),
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FN (esp6_encrypt_tun_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return esp_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ , 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (esp6_encrypt_tun_node) = {
+ .name = "esp6-encrypt-tun",
+ .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 = 1,
+ .next_nodes = {
+ [ESP_ENCRYPT_NEXT_DROP] = "ip6-drop",
+ },
+};
+
+VNET_FEATURE_INIT (esp6_encrypt_tun_feat_node, static) =
+{
+ .arc_name = "ip6-output",
+ .node_name = "esp6-encrypt-tun",
+ .runs_before = VNET_FEATURES ("adj-midchain-tx"),
+};
+/* *INDENT-ON* */
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff