#include <wireguard/wireguard.h>
#include <wireguard/wireguard_send.h>
-#define foreach_wg_output_error \
- _(NONE, "No error") \
- _(PEER, "Peer error") \
- _(KEYPAIR, "Keypair error") \
- _(TOO_BIG, "packet too big") \
+#define foreach_wg_output_error \
+ _ (NONE, "No error") \
+ _ (PEER, "Peer error") \
+ _ (KEYPAIR, "Keypair error") \
+ _ (TOO_BIG, "packet too big") \
+ _ (CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)")
typedef enum
{
u8 is_ip4;
} wg_output_tun_trace_t;
+typedef struct
+{
+ index_t peer;
+ u32 next_index;
+} wg_output_tun_post_trace_t;
+
u8 *
format_ip4_udp_header (u8 * s, va_list * args)
{
return s;
}
+/* post node - packet trace format function */
+static u8 *
+format_wg_output_tun_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_output_tun_post_trace_t *t = va_arg (*args, wg_output_tun_post_trace_t *);
+
+ s = format (s, "peer: %d\n", t->peer);
+ s = format (s, " wg-post: next node index %u", t->next_index);
+ return s;
+}
+
+static_always_inline void
+wg_prepare_sync_enc_op (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
+ u8 *src, u32 src_len, u8 *dst, u8 *aad, u32 aad_len,
+ u64 nonce, vnet_crypto_key_index_t key_index, u32 bi,
+ u8 *iv)
+{
+ vnet_crypto_op_t _op, *op = &_op;
+ u8 src_[] = {};
+
+ clib_memset (iv, 0, 4);
+ clib_memcpy (iv + 4, &nonce, sizeof (nonce));
+
+ vec_add2_aligned (crypto_ops[0], op, 1, CLIB_CACHE_LINE_BYTES);
+ vnet_crypto_op_init (op, VNET_CRYPTO_OP_CHACHA20_POLY1305_ENC);
+
+ op->tag_len = NOISE_AUTHTAG_LEN;
+ op->tag = dst + src_len;
+ op->src = !src ? src_ : src;
+ op->len = src_len;
+ op->dst = dst;
+ op->key_index = key_index;
+ op->aad = aad;
+ op->aad_len = aad_len;
+ op->iv = iv;
+ op->user_data = bi;
+}
+
static_always_inline void
wg_output_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_output_tun_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
+wq_output_tun_process (vlib_main_t *vm, vnet_crypto_op_t **crypto_ops,
+ noise_remote_t *r, uint32_t *r_idx, uint64_t *nonce,
+ uint8_t *src, size_t srclen, uint8_t *dst, u32 bi,
+ u8 *iv, f64 time)
+{
+ noise_keypair_t *kp;
+ enum noise_state_crypt ret = SC_FAILED;
+
+ if ((kp = r->r_current) == NULL)
+ goto error;
+
+ /* We confirm that our values are within our tolerances. We want:
+ * - a valid keypair
+ * - our keypair to be less than REJECT_AFTER_TIME seconds old
+ * - our receive counter to be less than REJECT_AFTER_MESSAGES
+ * - our send counter to be less than REJECT_AFTER_MESSAGES
+ */
+ if (!kp->kp_valid ||
+ wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME,
+ time) ||
+ kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES ||
+ ((*nonce = noise_counter_send (&kp->kp_ctr)) > REJECT_AFTER_MESSAGES))
+ goto error;
+
+ /* We encrypt into the same buffer, so the caller must ensure that buf
+ * has NOISE_AUTHTAG_LEN bytes to store the MAC. The nonce and index
+ * are passed back out to the caller through the provided data pointer. */
+ *r_idx = kp->kp_remote_index;
+
+ wg_prepare_sync_enc_op (vm, crypto_ops, src, srclen, dst, NULL, 0, *nonce,
+ kp->kp_send_index, bi, iv);
+
+ /* If our values are still within tolerances, but we are approaching
+ * the tolerances, we notify the caller with ESTALE that they should
+ * establish a new keypair. The current keypair can continue to be used
+ * until the tolerances are hit. We notify if:
+ * - our send counter is valid and not less than REKEY_AFTER_MESSAGES
+ * - we're the initiator and our keypair is older than
+ * REKEY_AFTER_TIME seconds */
+ ret = SC_KEEP_KEY_FRESH;
+ if ((kp->kp_valid && *nonce >= REKEY_AFTER_MESSAGES) ||
+ (kp->kp_is_initiator && wg_birthdate_has_expired_opt (
+ kp->kp_birthdate, REKEY_AFTER_TIME, time)))
+ goto error;
+
+ ret = SC_OK;
+error:
+ return ret;
+}
+
+static_always_inline enum noise_state_crypt
+wg_add_to_async_frame (vlib_main_t *vm, wg_per_thread_data_t *ptd,
+ vnet_crypto_async_frame_t *async_frame,
+ vlib_buffer_t *b, u8 *payload, u32 payload_len, u32 bi,
+ u16 next, u16 async_next, noise_remote_t *r,
+ uint32_t *r_idx, uint64_t *nonce, u8 *iv, f64 time)
+{
+ wg_post_data_t *post = wg_post_data (b);
+ u8 flag = 0;
+ noise_keypair_t *kp;
+
+ post->next_index = next;
+
+ /* crypto */
+ enum noise_state_crypt ret = SC_FAILED;
+
+ if ((kp = r->r_current) == NULL)
+ goto error;
+
+ /* We confirm that our values are within our tolerances. We want:
+ * - a valid keypair
+ * - our keypair to be less than REJECT_AFTER_TIME seconds old
+ * - our receive counter to be less than REJECT_AFTER_MESSAGES
+ * - our send counter to be less than REJECT_AFTER_MESSAGES
+ */
+ if (!kp->kp_valid ||
+ wg_birthdate_has_expired_opt (kp->kp_birthdate, REJECT_AFTER_TIME,
+ time) ||
+ kp->kp_ctr.c_recv >= REJECT_AFTER_MESSAGES ||
+ ((*nonce = noise_counter_send (&kp->kp_ctr)) > REJECT_AFTER_MESSAGES))
+ goto error;
+
+ /* We encrypt into the same buffer, so the caller must ensure that buf
+ * has NOISE_AUTHTAG_LEN bytes to store the MAC. The nonce and index
+ * are passed back out to the caller through the provided data pointer. */
+ *r_idx = kp->kp_remote_index;
+
+ clib_memset (iv, 0, 4);
+ clib_memcpy (iv + 4, nonce, sizeof (nonce));
+
+ /* this always succeeds because we know the frame is not full */
+ wg_output_tun_add_to_frame (vm, async_frame, kp->kp_send_index, payload_len,
+ payload - b->data, bi, async_next, iv,
+ payload + payload_len, flag);
+
+ /* If our values are still within tolerances, but we are approaching
+ * the tolerances, we notify the caller with ESTALE that they should
+ * establish a new keypair. The current keypair can continue to be used
+ * until the tolerances are hit. We notify if:
+ * - our send counter is valid and not less than REKEY_AFTER_MESSAGES
+ * - we're the initiator and our keypair is older than
+ * REKEY_AFTER_TIME seconds */
+ ret = SC_KEEP_KEY_FRESH;
+ if ((kp->kp_valid && *nonce >= REKEY_AFTER_MESSAGES) ||
+ (kp->kp_is_initiator && wg_birthdate_has_expired_opt (
+ kp->kp_birthdate, REKEY_AFTER_TIME, time)))
+ goto error;
+
+ ret = SC_OK;
+error:
+ return ret;
+}
+
/* is_ip4 - inner header flag */
always_inline uword
wg_output_tun_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)
{
wg_main_t *wmp = &wg_main;
wg_per_thread_data_t *ptd =
vlib_buffer_t *sync_bufs[VLIB_FRAME_SIZE];
u32 thread_index = vm->thread_index;
u16 n_sync = 0;
- u16 drop_next = WG_OUTPUT_NEXT_ERROR;
+ const u16 drop_next = WG_OUTPUT_NEXT_ERROR;
+ const u8 is_async = wg_op_mode_is_set_ASYNC ();
+ vnet_crypto_async_frame_t *async_frame = NULL;
+ u16 n_async = 0;
+ u16 noop_nexts[VLIB_FRAME_SIZE], *noop_next = noop_nexts, n_noop = 0;
+ u16 err = !0;
+ u32 sync_bi[VLIB_FRAME_SIZE];
+ u32 noop_bi[VLIB_FRAME_SIZE];
vlib_get_buffers (vm, from, bufs, n_left_from);
vec_reset_length (ptd->crypto_ops);
+ vec_reset_length (ptd->async_frames);
wg_peer_t *peer = NULL;
u32 adj_index = 0;
LOAD);
}
- next[0] = WG_OUTPUT_NEXT_ERROR;
+ noop_next[0] = WG_OUTPUT_NEXT_ERROR;
+ err = WG_OUTPUT_NEXT_ERROR;
adj_index = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
wg_peer_assign_thread (thread_index));
}
- if (PREDICT_TRUE (thread_index != peer->output_thread_index))
+ if (PREDICT_FALSE (thread_index != peer->output_thread_index))
{
- next[0] = WG_OUTPUT_NEXT_HANDOFF;
+ noop_next[0] = WG_OUTPUT_NEXT_HANDOFF;
+ err = WG_OUTPUT_NEXT_HANDOFF;
goto next;
}
last_adj_index = adj_index;
}
+ /* Here we are sure that can send packet to next node */
+ next[0] = WG_OUTPUT_NEXT_INTERFACE_OUTPUT;
+
enum noise_state_crypt state;
- state = noise_sync_remote_encrypt (
- vm, crypto_ops, &peer->remote, &message_data_wg->receiver_index,
- &message_data_wg->counter, plain_data, plain_data_len, plain_data,
- n_sync, iv_data, time);
+ if (is_async)
+ {
+ /* get a frame for this op if we don't yet have one or it's full */
+ 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_ENC);
+ /* Save the frame to the list we'll submit at the end */
+ vec_add1 (ptd->async_frames, async_frame);
+ }
+ state = wg_add_to_async_frame (
+ vm, ptd, async_frame, b[0], plain_data, plain_data_len,
+ from[b - bufs], next[0], async_next_node, &peer->remote,
+ &message_data_wg->receiver_index, &message_data_wg->counter,
+ iv_data, time);
+ }
+ else
+ {
+ state = wq_output_tun_process (
+ vm, crypto_ops, &peer->remote, &message_data_wg->receiver_index,
+ &message_data_wg->counter, plain_data, plain_data_len, plain_data,
+ n_sync, iv_data, time);
+ }
if (PREDICT_FALSE (state == SC_KEEP_KEY_FRESH))
{
// TODO: Maybe wrong
wg_send_handshake_from_mt (peeri, false);
wg_peer_update_flags (peeri, WG_PEER_ESTABLISHED, false);
+ noop_next[0] = WG_OUTPUT_NEXT_ERROR;
goto out;
}
- /* Here we are sure that can send packet to next node */
- next[0] = WG_OUTPUT_NEXT_INTERFACE_OUTPUT;
+ err = WG_OUTPUT_NEXT_INTERFACE_OUTPUT;
if (is_ip4_out)
{
}
next:
- sync_bufs[n_sync] = b[0];
- n_sync += 1;
+ if (PREDICT_FALSE (err != WG_OUTPUT_NEXT_INTERFACE_OUTPUT))
+ {
+ noop_bi[n_noop] = from[b - bufs];
+ n_noop++;
+ noop_next++;
+ goto next_left;
+ }
+ if (!is_async)
+ {
+ sync_bi[n_sync] = from[b - bufs];
+ sync_bufs[n_sync] = b[0];
+ n_sync += 1;
+ next += 1;
+ }
+ else
+ {
+ n_async++;
+ }
+ next_left:
n_left_from -= 1;
- next += 1;
b += 1;
}
- /* wg-output-process-ops */
- wg_output_process_ops (vm, node, ptd->crypto_ops, sync_bufs, nexts,
- drop_next);
+ if (n_sync)
+ {
+ /* wg-output-process-ops */
+ wg_output_process_ops (vm, node, ptd->crypto_ops, sync_bufs, nexts,
+ drop_next);
+ vlib_buffer_enqueue_to_next (vm, node, sync_bi, nexts, n_sync);
+ }
+ if (n_async)
+ {
+ /* submit all of the open frames */
+ vnet_crypto_async_frame_t **async_frame;
+
+ vec_foreach (async_frame, ptd->async_frames)
+ {
+ 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_noop;
+ while (n_drop--)
+ {
+ noop_bi[index] = bi[0];
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi[0]);
+ noop_nexts[index] = drop_next;
+ b->error = node->errors[WG_OUTPUT_ERROR_CRYPTO_ENGINE_ERROR];
+ bi++;
+ index++;
+ }
+ n_noop += (*async_frame)->n_elts;
+
+ vnet_crypto_async_reset_frame (*async_frame);
+ vnet_crypto_async_free_frame (vm, *async_frame);
+ }
+ }
+ }
+ if (n_noop)
+ {
+ vlib_buffer_enqueue_to_next (vm, node, noop_bi, noop_nexts, n_noop);
+ }
- vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_sync);
return frame->n_vectors;
}
+always_inline uword
+wg_output_tun_post (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame)
+{
+ 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;
+
+ index_t peeri = ~0;
+
+ vlib_get_buffers (vm, from, b, n_left);
+
+ if (n_left >= 4)
+ {
+ vlib_prefetch_buffer_header (b[0], LOAD);
+ vlib_prefetch_buffer_header (b[1], LOAD);
+ vlib_prefetch_buffer_header (b[2], LOAD);
+ vlib_prefetch_buffer_header (b[3], LOAD);
+ }
+
+ while (n_left > 8)
+ {
+ vlib_prefetch_buffer_header (b[4], LOAD);
+ vlib_prefetch_buffer_header (b[5], LOAD);
+ vlib_prefetch_buffer_header (b[6], LOAD);
+ vlib_prefetch_buffer_header (b[7], LOAD);
+
+ next[0] = (wg_post_data (b[0]))->next_index;
+ next[1] = (wg_post_data (b[1]))->next_index;
+ next[2] = (wg_post_data (b[2]))->next_index;
+ next[3] = (wg_post_data (b[3]))->next_index;
+
+ if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+ {
+ if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ wg_output_tun_post_trace_t *tr =
+ vlib_add_trace (vm, node, b[0], sizeof (*tr));
+ peeri = wg_peer_get_by_adj_index (
+ vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
+ tr->peer = peeri;
+ tr->next_index = next[0];
+ }
+ if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ wg_output_tun_post_trace_t *tr =
+ vlib_add_trace (vm, node, b[1], sizeof (*tr));
+ peeri = wg_peer_get_by_adj_index (
+ vnet_buffer (b[1])->ip.adj_index[VLIB_TX]);
+ tr->next_index = next[1];
+ }
+ if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ wg_output_tun_post_trace_t *tr =
+ vlib_add_trace (vm, node, b[2], sizeof (*tr));
+ peeri = wg_peer_get_by_adj_index (
+ vnet_buffer (b[2])->ip.adj_index[VLIB_TX]);
+ tr->next_index = next[2];
+ }
+ if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ wg_output_tun_post_trace_t *tr =
+ vlib_add_trace (vm, node, b[3], sizeof (*tr));
+ peeri = wg_peer_get_by_adj_index (
+ vnet_buffer (b[3])->ip.adj_index[VLIB_TX]);
+ tr->next_index = next[3];
+ }
+ }
+
+ b += 4;
+ next += 4;
+ n_left -= 4;
+ }
+
+ while (n_left > 0)
+ {
+ next[0] = (wg_post_data (b[0]))->next_index;
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ wg_output_tun_post_trace_t *tr =
+ vlib_add_trace (vm, node, b[0], sizeof (*tr));
+ peeri = wg_peer_get_by_adj_index (
+ vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
+ tr->next_index = next[0];
+ }
+
+ b += 1;
+ next += 1;
+ n_left -= 1;
+ }
+
+ vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (wg4_output_tun_post_node) = {
+ .name = "wg4-output-tun-post-node",
+ .vector_size = sizeof (u32),
+ .format_trace = format_wg_output_tun_post_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .sibling_of = "wg4-output-tun",
+ .n_errors = ARRAY_LEN (wg_output_error_strings),
+ .error_strings = wg_output_error_strings,
+};
+
+VLIB_REGISTER_NODE (wg6_output_tun_post_node) = {
+ .name = "wg6-output-tun-post-node",
+ .vector_size = sizeof (u32),
+ .format_trace = format_wg_output_tun_post_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .sibling_of = "wg6-output-tun",
+ .n_errors = ARRAY_LEN (wg_output_error_strings),
+ .error_strings = wg_output_error_strings,
+};
+
+VLIB_NODE_FN (wg4_output_tun_post_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
+{
+ return wg_output_tun_post (vm, node, from_frame);
+}
+
+VLIB_NODE_FN (wg6_output_tun_post_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
+{
+ return wg_output_tun_post (vm, node, from_frame);
+}
+
VLIB_NODE_FN (wg4_output_tun_node)
(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
{
- return wg_output_tun_inline (vm, node, frame, /* is_ip4 */ 1);
+ return wg_output_tun_inline (vm, node, frame, /* is_ip4 */ 1,
+ wg_encrypt_async_next.wg4_post_next);
}
VLIB_NODE_FN (wg6_output_tun_node)
(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
{
- return wg_output_tun_inline (vm, node, frame, /* is_ip4 */ 0);
+ return wg_output_tun_inline (vm, node, frame, /* is_ip4 */ 0,
+ wg_encrypt_async_next.wg6_post_next);
}
/* *INDENT-OFF* */
Code Review / vpp.git / commitdiff