#define foreach_wg_input_error \
_ (NONE, "No error") \
_ (HANDSHAKE_MAC, "Invalid MAC handshake") \
+ _ (HANDSHAKE_RATELIMITED, "Handshake ratelimited") \
_ (PEER, "Peer error") \
_ (INTERFACE, "Interface error") \
_ (DECRYPTION, "Failed during decryption") \
_ (KEEPALIVE_SEND, "Failed while sending Keepalive") \
_ (HANDSHAKE_SEND, "Failed while sending Handshake") \
_ (HANDSHAKE_RECEIVE, "Failed while receiving Handshake") \
- _ (TOO_BIG, "Packet too big") \
- _ (UNDEFINED, "Undefined error")
+ _ (COOKIE_DECRYPTION, "Failed during Cookie decryption") \
+ _ (COOKIE_SEND, "Failed during sending Cookie") \
+ _ (NO_BUFFERS, "No buffers") \
+ _ (UNDEFINED, "Undefined error") \
+ _ (CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)")
typedef enum
{
index_t peer;
} wg_input_trace_t;
+typedef struct
+{
+ index_t peer;
+ u16 next;
+} wg_input_post_trace_t;
+
u8 *
format_wg_message_type (u8 * s, va_list * args)
{
return s;
}
+/* post-node packet trace format function */
+static u8 *
+format_wg_input_post_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 *);
+
+ wg_input_post_trace_t *t = va_arg (*args, wg_input_post_trace_t *);
+
+ s = format (s, "WG input post: \n");
+ s = format (s, " peer: %u\n", t->peer);
+ s = format (s, " next: %u\n", t->next);
+
+ return s;
+}
+
typedef enum
{
WG_INPUT_NEXT_HANDOFF_HANDSHAKE,
WG_INPUT_N_NEXT,
} wg_input_next_t;
-/* static void */
-/* set_peer_address (wg_peer_t * peer, ip4_address_t ip4, u16 udp_port) */
-/* { */
-/* if (peer) */
-/* { */
-/* ip46_address_set_ip4 (&peer->dst.addr, &ip4); */
-/* peer->dst.port = udp_port; */
-/* } */
-/* } */
-
static u8
is_ip4_header (u8 *data)
{
}
udp_header_t *uhd = current_b_data - sizeof (udp_header_t);
- u16 udp_src_port = clib_host_to_net_u16 (uhd->src_port);;
- u16 udp_dst_port = clib_host_to_net_u16 (uhd->dst_port);;
+ u16 udp_src_port = clib_host_to_net_u16 (uhd->src_port);
+ u16 udp_dst_port = clib_host_to_net_u16 (uhd->dst_port);
message_header_t *header = current_b_data;
- under_load = false;
if (PREDICT_FALSE (header->type == MESSAGE_HANDSHAKE_COOKIE))
{
else
return WG_INPUT_ERROR_PEER;
- // TODO: Implement cookie_maker_consume_payload
+ if (!cookie_maker_consume_payload (
+ vm, &peer->cookie_maker, packet->nonce, packet->encrypted_cookie))
+ return WG_INPUT_ERROR_COOKIE_DECRYPTION;
return WG_INPUT_ERROR_NONE;
}
if (NULL == wg_if)
continue;
+ under_load = wg_if_is_under_load (vm, wg_if);
mac_state = cookie_checker_validate_macs (
vm, &wg_if->cookie_checker, macs, current_b_data, len, under_load,
&src_ip, udp_src_port);
if (mac_state == INVALID_MAC)
{
+ wg_if_dec_handshake_num (wg_if);
wg_if = NULL;
continue;
}
packet_needs_cookie = false;
else if (under_load && mac_state == VALID_MAC_BUT_NO_COOKIE)
packet_needs_cookie = true;
+ else if (mac_state == VALID_MAC_WITH_COOKIE_BUT_RATELIMITED)
+ return WG_INPUT_ERROR_HANDSHAKE_RATELIMITED;
else
return WG_INPUT_ERROR_HANDSHAKE_MAC;
if (packet_needs_cookie)
{
- // TODO: Add processing
+
+ if (!wg_send_handshake_cookie (vm, message->sender_index,
+ &wg_if->cookie_checker, macs,
+ &ip_addr_46 (&wg_if->src_ip),
+ wg_if->port, &src_ip, udp_src_port))
+ return WG_INPUT_ERROR_COOKIE_SEND;
+
+ return WG_INPUT_ERROR_NONE;
}
+
noise_remote_t *rp;
if (noise_consume_initiation
(vm, noise_local_get (wg_if->local_idx), &rp,
return WG_INPUT_ERROR_PEER;
}
- // set_peer_address (peer, ip4_src, udp_src_port);
+ wg_peer_update_endpoint (rp->r_peer_idx, &src_ip, udp_src_port);
+
if (PREDICT_FALSE (!wg_send_handshake_response (vm, peer)))
{
vlib_node_increment_counter (vm, node_idx,
WG_INPUT_ERROR_HANDSHAKE_SEND, 1);
}
- else
- {
- wg_peer_update_flags (rp->r_peer_idx, WG_PEER_ESTABLISHED, true);
- }
break;
}
case MESSAGE_HANDSHAKE_RESPONSE:
{
message_handshake_response_t *resp = current_b_data;
+
+ if (packet_needs_cookie)
+ {
+ if (!wg_send_handshake_cookie (vm, resp->sender_index,
+ &wg_if->cookie_checker, macs,
+ &ip_addr_46 (&wg_if->src_ip),
+ wg_if->port, &src_ip, udp_src_port))
+ return WG_INPUT_ERROR_COOKIE_SEND;
+
+ return WG_INPUT_ERROR_NONE;
+ }
+
index_t peeri = INDEX_INVALID;
u32 *entry =
wg_index_table_lookup (&wmp->index_table, resp->receiver_index);
{
return WG_INPUT_ERROR_PEER;
}
- if (packet_needs_cookie)
- {
- // TODO: Add processing
- }
- // set_peer_address (peer, ip4_src, udp_src_port);
+ wg_peer_update_endpoint (peeri, &src_ip, udp_src_port);
+
if (noise_remote_begin_session (vm, &peer->remote))
{
return WG_INPUT_ERROR_NONE;
}
+static_always_inline int
+wg_input_post_process (vlib_main_t *vm, vlib_buffer_t *b, u16 *next,
+ wg_peer_t *peer, message_data_t *data,
+ bool *is_keepalive)
+{
+ next[0] = WG_INPUT_NEXT_PUNT;
+ noise_keypair_t *kp;
+ vlib_buffer_t *lb;
+
+ if ((kp = wg_get_active_keypair (&peer->remote, data->receiver_index)) ==
+ NULL)
+ return -1;
+
+ if (!noise_counter_recv (&kp->kp_ctr, data->counter))
+ {
+ return -1;
+ }
+
+ lb = b;
+ /* Find last buffer in the chain */
+ while (lb->flags & VLIB_BUFFER_NEXT_PRESENT)
+ lb = vlib_get_buffer (vm, lb->next_buffer);
+
+ u16 encr_len = vlib_buffer_length_in_chain (vm, b) - sizeof (message_data_t);
+ u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
+
+ vlib_buffer_advance (b, sizeof (message_data_t));
+ vlib_buffer_chain_increase_length (b, lb, -NOISE_AUTHTAG_LEN);
+ vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
+
+ /* Keepalive packet has zero length */
+ if (decr_len == 0)
+ {
+ *is_keepalive = true;
+ return 0;
+ }
+
+ wg_timers_data_received (peer);
+
+ ip46_address_t src_ip;
+ u8 is_ip4_inner = is_ip4_header (vlib_buffer_get_current (b));
+ if (is_ip4_inner)
+ {
+ ip46_address_set_ip4 (
+ &src_ip, &((ip4_header_t *) vlib_buffer_get_current (b))->src_address);
+ }
+ else
+ {
+ ip46_address_set_ip6 (
+ &src_ip, &((ip6_header_t *) vlib_buffer_get_current (b))->src_address);
+ }
+
+ const fib_prefix_t *allowed_ip;
+ bool allowed = false;
+
+ /*
+ * we could make this into an ACL, but the expectation
+ * is that there aren't many allowed IPs and thus a linear
+ * walk is faster than an ACL
+ */
+ vec_foreach (allowed_ip, peer->allowed_ips)
+ {
+ if (fib_prefix_is_cover_addr_46 (allowed_ip, &src_ip))
+ {
+ allowed = true;
+ break;
+ }
+ }
+ if (allowed)
+ {
+ vnet_buffer (b)->sw_if_index[VLIB_RX] = peer->wg_sw_if_index;
+ next[0] =
+ is_ip4_inner ? WG_INPUT_NEXT_IP4_INPUT : WG_INPUT_NEXT_IP6_INPUT;
+ }
+
+ return 0;
+}
+
static_always_inline void
wg_input_process_ops (vlib_main_t *vm, vlib_node_runtime_t *node,
vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts,
}
}
+static_always_inline void
+wg_input_process_chained_ops (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vnet_crypto_op_t *ops, vlib_buffer_t *b[],
+ u16 *nexts, vnet_crypto_op_chunk_t *chunks,
+ u16 drop_next)
+{
+ u32 n_fail, n_ops = vec_len (ops);
+ vnet_crypto_op_t *op = ops;
+
+ if (n_ops == 0)
+ return;
+
+ n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
+
+ while (n_fail)
+ {
+ ASSERT (op - ops < n_ops);
+
+ if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
+ {
+ u32 bi = op->user_data;
+ b[bi]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
+ nexts[bi] = drop_next;
+ n_fail--;
+ }
+ op++;
+ }
+}
+
+static_always_inline void
+wg_input_chain_crypto (vlib_main_t *vm, wg_per_thread_data_t *ptd,
+ vlib_buffer_t *b, vlib_buffer_t *lb, u8 *start,
+ u32 start_len, u16 *n_ch)
+{
+ vnet_crypto_op_chunk_t *ch;
+ vlib_buffer_t *cb = b;
+ u32 n_chunks = 1;
+
+ vec_add2 (ptd->chunks, ch, 1);
+ ch->len = start_len;
+ ch->src = ch->dst = start;
+ cb = vlib_get_buffer (vm, cb->next_buffer);
+
+ while (1)
+ {
+ vec_add2 (ptd->chunks, ch, 1);
+ n_chunks += 1;
+ if (lb == cb)
+ ch->len = cb->current_length - NOISE_AUTHTAG_LEN;
+ else
+ ch->len = cb->current_length;
+
+ ch->src = ch->dst = vlib_buffer_get_current (cb);
+
+ if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
+ break;
+
+ cb = vlib_get_buffer (vm, cb->next_buffer);
+ }
+
+ if (n_ch)
+ *n_ch = n_chunks;
+}
+
+always_inline void
+wg_prepare_sync_dec_op (vlib_main_t *vm, wg_per_thread_data_t *ptd,
+ vlib_buffer_t *b, vlib_buffer_t *lb,
+ vnet_crypto_op_t **crypto_ops, u8 *src, u32 src_len,
+ u8 *dst, u8 *aad, u32 aad_len,
+ vnet_crypto_key_index_t key_index, u32 bi, u8 *iv)
+{
+ vnet_crypto_op_t _op, *op = &_op;
+ u8 src_[] = {};
+
+ vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
+ vnet_crypto_op_init (op, VNET_CRYPTO_OP_CHACHA20_POLY1305_DEC);
+
+ op->tag_len = NOISE_AUTHTAG_LEN;
+ op->tag = vlib_buffer_get_tail (lb) - NOISE_AUTHTAG_LEN;
+ op->key_index = key_index;
+ op->aad = aad;
+ op->aad_len = aad_len;
+ op->iv = iv;
+ op->user_data = bi;
+ op->flags |= VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
+
+ if (b != lb)
+ {
+ /* Chained buffers */
+ op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
+ op->chunk_index = vec_len (ptd->chunks);
+ wg_input_chain_crypto (vm, ptd, b, lb, src, src_len + NOISE_AUTHTAG_LEN,
+ &op->n_chunks);
+ }
+ else
+ {
+ op->src = !src ? src_ : src;
+ op->len = src_len;
+ op->dst = dst;
+ }
+}
+
+static_always_inline void
+wg_input_add_to_frame (vlib_main_t *vm, vnet_crypto_async_frame_t *f,
+ u32 key_index, u32 crypto_len, i16 crypto_start_offset,
+ u32 buffer_index, u16 next_node, u8 *iv, u8 *tag,
+ u8 flags)
+{
+ vnet_crypto_async_frame_elt_t *fe;
+ u16 index;
+
+ ASSERT (f->n_elts < VNET_CRYPTO_FRAME_SIZE);
+
+ index = f->n_elts;
+ fe = &f->elts[index];
+ f->n_elts++;
+ fe->key_index = key_index;
+ fe->crypto_total_length = crypto_len;
+ fe->crypto_start_offset = crypto_start_offset;
+ fe->iv = iv;
+ fe->tag = tag;
+ fe->flags = flags;
+ f->buffer_indices[index] = buffer_index;
+ f->next_node_index[index] = next_node;
+}
+
+static_always_inline enum noise_state_crypt
+wg_input_process (vlib_main_t *vm, wg_per_thread_data_t *ptd,
+ vnet_crypto_op_t **crypto_ops,
+ vnet_crypto_async_frame_t **async_frame, vlib_buffer_t *b,
+ vlib_buffer_t *lb, u32 buf_idx, noise_remote_t *r,
+ uint32_t r_idx, uint64_t nonce, uint8_t *src, size_t srclen,
+ size_t srclen_total, uint8_t *dst, u32 from_idx, u8 *iv,
+ f64 time, u8 is_async, u16 async_next_node)
+{
+ noise_keypair_t *kp;
+ enum noise_state_crypt ret = SC_FAILED;
+
+ if ((kp = wg_get_active_keypair (r, r_idx)) == NULL)
+ {
+ goto error;
+ }
+
+ /* We confirm that our values are within our tolerances. These values
+ * are the same as the encrypt routine.
+ *
+ * kp_ctr isn't locked here, we're happy to accept a racy read. */
+ if (wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME,
+ time) ||
+ kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES)
+ goto error;
+
+ /* Decrypt, then validate the counter. We don't want to validate the
+ * counter before decrypting as we do not know the message is authentic
+ * prior to decryption. */
+
+ clib_memset (iv, 0, 4);
+ clib_memcpy (iv + 4, &nonce, sizeof (nonce));
+
+ if (is_async)
+ {
+ u8 flags = VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
+ u8 *tag = vlib_buffer_get_tail (lb) - NOISE_AUTHTAG_LEN;
+
+ if (b != lb)
+ flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
+
+ if (NULL == *async_frame ||
+ vnet_crypto_async_frame_is_full (*async_frame))
+ {
+ *async_frame = vnet_crypto_async_get_frame (
+ vm, VNET_CRYPTO_OP_CHACHA20_POLY1305_TAG16_AAD0_DEC);
+ if (PREDICT_FALSE (NULL == *async_frame))
+ goto error;
+ /* Save the frame to the list we'll submit at the end */
+ vec_add1 (ptd->async_frames, *async_frame);
+ }
+
+ wg_input_add_to_frame (vm, *async_frame, kp->kp_recv_index, srclen_total,
+ src - b->data, buf_idx, async_next_node, iv, tag,
+ flags);
+ }
+ else
+ {
+ wg_prepare_sync_dec_op (vm, ptd, b, lb, crypto_ops, src, srclen, dst,
+ NULL, 0, kp->kp_recv_index, from_idx, iv);
+ }
+
+ /* If we've received the handshake confirming data packet then move the
+ * next keypair into current. If we do slide the next keypair in, then
+ * we skip the REKEY_AFTER_TIME_RECV check. This is safe to do as a
+ * data packet can't confirm a session that we are an INITIATOR of. */
+ if (kp == r->r_next)
+ {
+ clib_rwlock_writer_lock (&r->r_keypair_lock);
+ if (kp == r->r_next && kp->kp_local_index == r_idx)
+ {
+ noise_remote_keypair_free (vm, r, &r->r_previous);
+ r->r_previous = r->r_current;
+ r->r_current = r->r_next;
+ r->r_next = NULL;
+
+ ret = SC_CONN_RESET;
+ clib_rwlock_writer_unlock (&r->r_keypair_lock);
+ goto error;
+ }
+ clib_rwlock_writer_unlock (&r->r_keypair_lock);
+ }
+
+ /* Similar to when we encrypt, we want to notify the caller when we
+ * are approaching our tolerances. We notify if:
+ * - we're the initiator and the current keypair is older than
+ * REKEY_AFTER_TIME_RECV seconds. */
+ ret = SC_KEEP_KEY_FRESH;
+ kp = r->r_current;
+ if (kp != NULL && kp->kp_valid && kp->kp_is_initiator &&
+ wg_birthdate_has_expired_opt (kp->kp_birthdate, REKEY_AFTER_TIME_RECV,
+ time))
+ goto error;
+
+ ret = SC_OK;
+error:
+ return ret;
+}
+
+static_always_inline void
+wg_find_outer_addr_port (vlib_buffer_t *b, ip46_address_t *addr, u16 *port,
+ u8 is_ip4)
+{
+ if (is_ip4)
+ {
+ ip4_udp_header_t *ip4_udp_hdr =
+ vlib_buffer_get_current (b) - sizeof (ip4_udp_header_t);
+ ip46_address_set_ip4 (addr, &ip4_udp_hdr->ip4.src_address);
+ *port = clib_net_to_host_u16 (ip4_udp_hdr->udp.src_port);
+ }
+ else
+ {
+ ip6_udp_header_t *ip6_udp_hdr =
+ vlib_buffer_get_current (b) - sizeof (ip6_udp_header_t);
+ ip46_address_set_ip6 (addr, &ip6_udp_hdr->ip6.src_address);
+ *port = clib_net_to_host_u16 (ip6_udp_hdr->udp.src_port);
+ }
+}
+
always_inline uword
wg_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
- vlib_frame_t *frame, u8 is_ip4)
+ vlib_frame_t *frame, u8 is_ip4, u16 async_next_node)
{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_interface_main_t *im = &vnm->interface_main;
wg_main_t *wmp = &wg_main;
wg_per_thread_data_t *ptd =
vec_elt_at_index (wmp->per_thread_data, vm->thread_index);
u32 n_left_from = frame->n_vectors;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ vlib_buffer_t *lb;
u32 thread_index = vm->thread_index;
- vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
+ vnet_crypto_op_t **crypto_ops;
const u16 drop_next = WG_INPUT_NEXT_PUNT;
message_type_t header_type;
vlib_buffer_t *data_bufs[VLIB_FRAME_SIZE];
u32 other_bi[VLIB_FRAME_SIZE]; /* buffer index for drop or handoff */
u16 other_nexts[VLIB_FRAME_SIZE], *other_next = other_nexts, n_other = 0;
u16 data_nexts[VLIB_FRAME_SIZE], *data_next = data_nexts, n_data = 0;
+ u16 n_async = 0;
+ const u8 is_async = wg_op_mode_is_set_ASYNC ();
+ vnet_crypto_async_frame_t *async_frame = NULL;
vlib_get_buffers (vm, from, bufs, n_left_from);
vec_reset_length (ptd->crypto_ops);
+ vec_reset_length (ptd->chained_crypto_ops);
+ vec_reset_length (ptd->chunks);
+ vec_reset_length (ptd->async_frames);
f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
bool is_keepalive = false;
u32 *peer_idx = NULL;
+ index_t peeri = INDEX_INVALID;
while (n_left_from > 0)
{
{
message_data_t *data = vlib_buffer_get_current (b[0]);
u8 *iv_data = b[0]->pre_data;
+ u32 buf_idx = from[b - bufs];
+ u32 n_bufs;
peer_idx = wg_index_table_lookup (&wmp->index_table,
data->receiver_index);
data->receiver_index);
if (PREDICT_TRUE (peer_idx != NULL))
{
- peer = wg_peer_get (*peer_idx);
+ peeri = *peer_idx;
+ peer = wg_peer_get (peeri);
+ last_rec_idx = data->receiver_index;
+ }
+ else
+ {
+ peer = NULL;
+ last_rec_idx = ~0;
}
- last_rec_idx = data->receiver_index;
}
if (PREDICT_FALSE (!peer_idx))
{
other_next[n_other] = WG_INPUT_NEXT_ERROR;
b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
- other_bi[n_other] = from[b - bufs];
+ other_bi[n_other] = buf_idx;
n_other += 1;
goto out;
}
if (PREDICT_TRUE (thread_index != peer->input_thread_index))
{
other_next[n_other] = WG_INPUT_NEXT_HANDOFF_DATA;
- other_bi[n_other] = from[b - bufs];
+ other_bi[n_other] = buf_idx;
n_other += 1;
goto next;
}
- u16 encr_len = b[0]->current_length - sizeof (message_data_t);
- u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
- if (PREDICT_FALSE (decr_len >= WG_DEFAULT_DATA_SIZE))
+ lb = b[0];
+ n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
+ if (n_bufs == 0)
{
- b[0]->error = node->errors[WG_INPUT_ERROR_TOO_BIG];
- other_bi[n_other] = from[b - bufs];
+ other_next[n_other] = WG_INPUT_NEXT_ERROR;
+ b[0]->error = node->errors[WG_INPUT_ERROR_NO_BUFFERS];
+ other_bi[n_other] = buf_idx;
n_other += 1;
goto out;
}
- enum noise_state_crypt state_cr = noise_sync_remote_decrypt (
- vm, crypto_ops, &peer->remote, data->receiver_index, data->counter,
- data->encrypted_data, decr_len, data->encrypted_data, n_data,
- iv_data, time);
-
- if (PREDICT_FALSE (state_cr == SC_CONN_RESET))
- {
- wg_timers_handshake_complete (peer);
- data_bufs[n_data] = b[0];
- data_bi[n_data] = from[b - bufs];
- n_data += 1;
- goto next;
- }
- else if (PREDICT_FALSE (state_cr == SC_KEEP_KEY_FRESH))
+ if (n_bufs > 1)
{
- wg_send_handshake_from_mt (*peer_idx, false);
- data_bufs[n_data] = b[0];
- data_bi[n_data] = from[b - bufs];
- n_data += 1;
- goto next;
+ vlib_buffer_t *before_last = b[0];
+
+ /* Find last and before last buffer in the chain */
+ while (lb->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ before_last = lb;
+ lb = vlib_get_buffer (vm, lb->next_buffer);
+ }
+
+ /* Ensure auth tag is contiguous and not splitted into two last
+ * buffers */
+ if (PREDICT_FALSE (lb->current_length < NOISE_AUTHTAG_LEN))
+ {
+ u32 len_diff = NOISE_AUTHTAG_LEN - lb->current_length;
+
+ before_last->current_length -= len_diff;
+ if (before_last == b[0])
+ before_last->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
+
+ vlib_buffer_advance (lb, (signed) -len_diff);
+
+ clib_memcpy_fast (vlib_buffer_get_current (lb),
+ vlib_buffer_get_tail (before_last),
+ len_diff);
+ }
}
- else if (PREDICT_FALSE (state_cr == SC_FAILED))
+
+ u16 encr_len = b[0]->current_length - sizeof (message_data_t);
+ u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
+ u16 encr_len_total =
+ vlib_buffer_length_in_chain (vm, b[0]) - sizeof (message_data_t);
+ u16 decr_len_total = encr_len_total - NOISE_AUTHTAG_LEN;
+
+ if (lb != b[0])
+ crypto_ops = &ptd->chained_crypto_ops;
+ else
+ crypto_ops = &ptd->crypto_ops;
+
+ enum noise_state_crypt state_cr =
+ wg_input_process (vm, ptd, crypto_ops, &async_frame, b[0], lb,
+ buf_idx, &peer->remote, data->receiver_index,
+ data->counter, data->encrypted_data, decr_len,
+ decr_len_total, data->encrypted_data, n_data,
+ iv_data, time, is_async, async_next_node);
+
+ if (PREDICT_FALSE (state_cr == SC_FAILED))
{
wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, false);
other_next[n_other] = WG_INPUT_NEXT_ERROR;
b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
- other_bi[n_other] = from[b - bufs];
+ other_bi[n_other] = buf_idx;
n_other += 1;
goto out;
}
- else if (PREDICT_TRUE (state_cr == SC_OK))
+ if (!is_async)
{
data_bufs[n_data] = b[0];
- data_bi[n_data] = from[b - bufs];
+ data_bi[n_data] = buf_idx;
n_data += 1;
+ }
+ else
+ {
+ n_async += 1;
+ }
+
+ if (PREDICT_FALSE (state_cr == SC_CONN_RESET))
+ {
+ wg_timers_handshake_complete (peer);
+ goto next;
+ }
+ else if (PREDICT_FALSE (state_cr == SC_KEEP_KEY_FRESH))
+ {
+ wg_send_handshake_from_mt (peeri, false);
goto next;
}
+ else if (PREDICT_TRUE (state_cr == SC_OK))
+ goto next;
}
else
{
- peer_idx = NULL;
-
/* Handshake packets should be processed in main thread */
if (thread_index != 0)
{
t->type = header_type;
t->current_length = b[0]->current_length;
t->is_keepalive = is_keepalive;
- t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
+ t->peer = peer_idx ? peeri : INDEX_INVALID;
}
next:
/* decrypt packets */
wg_input_process_ops (vm, node, ptd->crypto_ops, data_bufs, data_nexts,
drop_next);
+ wg_input_process_chained_ops (vm, node, ptd->chained_crypto_ops, data_bufs,
+ data_nexts, ptd->chunks, drop_next);
/* process after decryption */
b = data_bufs;
n_left_from = n_data;
- n_data = 0;
last_rec_idx = ~0;
last_peer_time_idx = NULL;
+
while (n_left_from > 0)
{
bool is_keepalive = false;
u32 *peer_idx = NULL;
- if (data_next[n_data] == WG_INPUT_NEXT_PUNT)
+ if (PREDICT_FALSE (data_next[0] == WG_INPUT_NEXT_PUNT))
{
goto trace;
}
- else
+ if (n_left_from > 2)
{
- data_next[n_data] = WG_INPUT_NEXT_PUNT;
+ u8 *p;
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ p = vlib_buffer_get_current (b[1]);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (vlib_buffer_get_tail (b[1]), CLIB_CACHE_LINE_BYTES,
+ LOAD);
}
message_data_t *data = vlib_buffer_get_current (b[0]);
+ ip46_address_t out_src_ip;
+ u16 out_udp_src_port;
+
+ wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
if (data->receiver_index != last_rec_idx)
{
peer_idx =
wg_index_table_lookup (&wmp->index_table, data->receiver_index);
- /* already checked and excisting */
- peer = wg_peer_get (*peer_idx);
- last_rec_idx = data->receiver_index;
+ if (PREDICT_TRUE (peer_idx != NULL))
+ {
+ peeri = *peer_idx;
+ peer = wg_peer_get (peeri);
+ last_rec_idx = data->receiver_index;
+ }
+ else
+ {
+ peer = NULL;
+ last_rec_idx = ~0;
+ }
}
- noise_keypair_t *kp =
- wg_get_active_keypair (&peer->remote, data->receiver_index);
-
- if (!noise_counter_recv (&kp->kp_ctr, data->counter))
+ if (PREDICT_TRUE (peer != NULL))
{
+ if (PREDICT_FALSE (wg_input_post_process (vm, b[0], data_next, peer,
+ data, &is_keepalive) < 0))
+ goto trace;
+ }
+ else
+ {
+ data_next[0] = WG_INPUT_NEXT_PUNT;
goto trace;
}
- u16 encr_len = b[0]->current_length - sizeof (message_data_t);
- u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
-
- vlib_buffer_advance (b[0], sizeof (message_data_t));
- b[0]->current_length = decr_len;
- vnet_buffer_offload_flags_clear (b[0], VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
-
if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
{
+ if (PREDICT_FALSE (
+ !ip46_address_is_equal (&peer->dst.addr, &out_src_ip) ||
+ peer->dst.port != out_udp_src_port))
+ wg_peer_update_endpoint_from_mt (peeri, &out_src_ip,
+ out_udp_src_port);
wg_timers_any_authenticated_packet_received_opt (peer, time);
wg_timers_any_authenticated_packet_traversal (peer);
+ wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, true);
last_peer_time_idx = peer_idx;
}
- /* Keepalive packet has zero length */
- if (decr_len == 0)
+ vlib_increment_combined_counter (im->combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_RX,
+ vm->thread_index, peer->wg_sw_if_index,
+ 1 /* packets */, b[0]->current_length);
+
+ trace:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
{
- is_keepalive = true;
- goto trace;
+ wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->type = header_type;
+ t->current_length = b[0]->current_length;
+ t->is_keepalive = is_keepalive;
+ t->peer = peer_idx ? peeri : INDEX_INVALID;
}
- wg_timers_data_received (peer);
+ b += 1;
+ n_left_from -= 1;
+ data_next += 1;
+ }
- ip46_address_t src_ip;
- u8 is_ip4_inner = is_ip4_header (vlib_buffer_get_current (b[0]));
- if (is_ip4_inner)
+ if (n_async)
+ {
+ /* submit all of the open frames */
+ vnet_crypto_async_frame_t **async_frame;
+ vec_foreach (async_frame, ptd->async_frames)
{
- ip46_address_set_ip4 (
- &src_ip,
- &((ip4_header_t *) vlib_buffer_get_current (b[0]))->src_address);
+ if (PREDICT_FALSE (
+ vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0))
+ {
+ u32 n_drop = (*async_frame)->n_elts;
+ u32 *bi = (*async_frame)->buffer_indices;
+ u16 index = n_other;
+ while (n_drop--)
+ {
+ other_bi[index] = bi[0];
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
+ other_nexts[index] = drop_next;
+ b->error = node->errors[WG_INPUT_ERROR_CRYPTO_ENGINE_ERROR];
+ bi++;
+ index++;
+ }
+ n_other += (*async_frame)->n_elts;
+
+ vnet_crypto_async_reset_frame (*async_frame);
+ vnet_crypto_async_free_frame (vm, *async_frame);
+ }
}
- else
+ }
+
+ /* enqueue other bufs */
+ if (n_other)
+ vlib_buffer_enqueue_to_next (vm, node, other_bi, other_next, n_other);
+
+ /* enqueue data bufs */
+ if (n_data)
+ vlib_buffer_enqueue_to_next (vm, node, data_bi, data_nexts, n_data);
+
+ return frame->n_vectors;
+}
+
+always_inline uword
+wg_input_post (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame,
+ u8 is_ip4)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_interface_main_t *im = &vnm->interface_main;
+ wg_main_t *wmp = &wg_main;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ u32 *from = vlib_frame_vector_args (frame);
+ u32 n_left = frame->n_vectors;
+ wg_peer_t *peer = NULL;
+ u32 *peer_idx = NULL;
+ u32 *last_peer_time_idx = NULL;
+ index_t peeri = INDEX_INVALID;
+ u32 last_rec_idx = ~0;
+ f64 time = clib_time_now (&vm->clib_time) + vm->time_offset;
+
+ vlib_get_buffers (vm, from, b, n_left);
+
+ if (n_left >= 2)
+ {
+ vlib_prefetch_buffer_header (b[0], LOAD);
+ vlib_prefetch_buffer_header (b[1], LOAD);
+ }
+
+ while (n_left > 0)
+ {
+ if (n_left > 2)
{
- ip46_address_set_ip6 (
- &src_ip,
- &((ip6_header_t *) vlib_buffer_get_current (b[0]))->src_address);
+ u8 *p;
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ p = vlib_buffer_get_current (b[1]);
+ CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
}
- const fib_prefix_t *allowed_ip;
- bool allowed = false;
+ bool is_keepalive = false;
+ message_data_t *data = vlib_buffer_get_current (b[0]);
+ ip46_address_t out_src_ip;
+ u16 out_udp_src_port;
- /*
- * we could make this into an ACL, but the expectation
- * is that there aren't many allowed IPs and thus a linear
- * walk is fater than an ACL
- */
+ wg_find_outer_addr_port (b[0], &out_src_ip, &out_udp_src_port, is_ip4);
- vec_foreach (allowed_ip, peer->allowed_ips)
+ if (data->receiver_index != last_rec_idx)
{
- if (fib_prefix_is_cover_addr_46 (allowed_ip, &src_ip))
+ peer_idx =
+ wg_index_table_lookup (&wmp->index_table, data->receiver_index);
+
+ if (PREDICT_TRUE (peer_idx != NULL))
+ {
+ peeri = *peer_idx;
+ peer = wg_peer_get (peeri);
+ last_rec_idx = data->receiver_index;
+ }
+ else
{
- allowed = true;
- break;
+ peer = NULL;
+ last_rec_idx = ~0;
}
}
- if (allowed)
+
+ if (PREDICT_TRUE (peer != NULL))
{
- vnet_buffer (b[0])->sw_if_index[VLIB_RX] = peer->wg_sw_if_index;
- data_next[n_data] =
- is_ip4_inner ? WG_INPUT_NEXT_IP4_INPUT : WG_INPUT_NEXT_IP6_INPUT;
+ if (PREDICT_FALSE (wg_input_post_process (vm, b[0], next, peer, data,
+ &is_keepalive) < 0))
+ goto trace;
}
+ else
+ {
+ next[0] = WG_INPUT_NEXT_PUNT;
+ goto trace;
+ }
+
+ if (PREDICT_FALSE (peer_idx && (last_peer_time_idx != peer_idx)))
+ {
+ if (PREDICT_FALSE (
+ !ip46_address_is_equal (&peer->dst.addr, &out_src_ip) ||
+ peer->dst.port != out_udp_src_port))
+ wg_peer_update_endpoint_from_mt (peeri, &out_src_ip,
+ out_udp_src_port);
+ wg_timers_any_authenticated_packet_received_opt (peer, time);
+ wg_timers_any_authenticated_packet_traversal (peer);
+ wg_peer_update_flags (*peer_idx, WG_PEER_ESTABLISHED, true);
+ last_peer_time_idx = peer_idx;
+ }
+
+ vlib_increment_combined_counter (im->combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_RX,
+ vm->thread_index, peer->wg_sw_if_index,
+ 1 /* packets */, b[0]->current_length);
+
trace:
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
(b[0]->flags & VLIB_BUFFER_IS_TRACED)))
{
- wg_input_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t));
- t->type = header_type;
- t->current_length = b[0]->current_length;
- t->is_keepalive = is_keepalive;
- t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
+ wg_input_post_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next = next[0];
+ t->peer = peer_idx ? peeri : INDEX_INVALID;
}
b += 1;
- n_left_from -= 1;
- n_data += 1;
+ next += 1;
+ n_left -= 1;
}
- /* enqueue other bufs */
- vlib_buffer_enqueue_to_next (vm, node, other_bi, other_next, n_other);
-
- /* enqueue data bufs */
- vlib_buffer_enqueue_to_next (vm, node, data_bi, data_nexts, n_data);
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
return frame->n_vectors;
}
VLIB_NODE_FN (wg4_input_node)
(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
{
- return wg_input_inline (vm, node, frame, /* is_ip4 */ 1);
+ return wg_input_inline (vm, node, frame, /* is_ip4 */ 1,
+ wg_decrypt_async_next.wg4_post_next);
}
VLIB_NODE_FN (wg6_input_node)
(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
{
- return wg_input_inline (vm, node, frame, /* is_ip4 */ 0);
+ return wg_input_inline (vm, node, frame, /* is_ip4 */ 0,
+ wg_decrypt_async_next.wg6_post_next);
+}
+
+VLIB_NODE_FN (wg4_input_post_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
+{
+ return wg_input_post (vm, node, from_frame, /* is_ip4 */ 1);
+}
+
+VLIB_NODE_FN (wg6_input_post_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
+{
+ return wg_input_post (vm, node, from_frame, /* is_ip4 */ 0);
}
/* *INDENT-OFF* */
[WG_INPUT_NEXT_ERROR] = "error-drop",
},
};
+
+VLIB_REGISTER_NODE (wg4_input_post_node) = {
+ .name = "wg4-input-post-node",
+ .vector_size = sizeof (u32),
+ .format_trace = format_wg_input_post_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .sibling_of = "wg4-input",
+
+ .n_errors = ARRAY_LEN (wg_input_error_strings),
+ .error_strings = wg_input_error_strings,
+};
+
+VLIB_REGISTER_NODE (wg6_input_post_node) = {
+ .name = "wg6-input-post-node",
+ .vector_size = sizeof (u32),
+ .format_trace = format_wg_input_post_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .sibling_of = "wg6-input",
+
+ .n_errors = ARRAY_LEN (wg_input_error_strings),
+ .error_strings = wg_input_error_strings,
+};
+
/* *INDENT-ON* */
/*
Code Review / vpp.git / blobdiff