_(DECRYPTION, "Failed during decryption") \
_(KEEPALIVE_SEND, "Failed while sending Keepalive") \
_(HANDSHAKE_SEND, "Failed while sending Handshake") \
+ _(TOO_BIG, "Packet too big") \
_(UNDEFINED, "Undefined error")
typedef enum
message_type_t type;
u16 current_length;
bool is_keepalive;
-
+ index_t peer;
} wg_input_trace_t;
u8 *
s = format (s, "WG input: \n");
s = format (s, " Type: %U\n", format_wg_message_type, t->type);
+ s = format (s, " peer: %d\n", t->peer);
s = format (s, " Length: %d\n", t->current_length);
s = format (s, " Keepalive: %s", t->is_keepalive ? "true" : "false");
typedef enum
{
+ WG_INPUT_NEXT_HANDOFF_HANDSHAKE,
+ WG_INPUT_NEXT_HANDOFF_DATA,
WG_INPUT_NEXT_IP4_INPUT,
WG_INPUT_NEXT_PUNT,
WG_INPUT_NEXT_ERROR,
static wg_input_error_t
wg_handshake_process (vlib_main_t * vm, wg_main_t * wmp, vlib_buffer_t * b)
{
+ ASSERT (vm->thread_index == 0);
+
enum cookie_mac_state mac_state;
bool packet_needs_cookie;
bool under_load;
if (NULL == wg_if)
return WG_INPUT_ERROR_INTERFACE;
- if (header->type == MESSAGE_HANDSHAKE_COOKIE)
+ if (PREDICT_FALSE (header->type == MESSAGE_HANDSHAKE_COOKIE))
{
message_handshake_cookie_t *packet =
(message_handshake_cookie_t *) current_b_data;
u32 *entry =
wg_index_table_lookup (&wmp->index_table, packet->receiver_index);
if (entry)
- {
- peer = pool_elt_at_index (wmp->peers, *entry);
- }
- if (!peer)
+ peer = wg_peer_get (*entry);
+ else
return WG_INPUT_ERROR_PEER;
// TODO: Implement cookie_maker_consume_payload
// TODO: Add processing
}
noise_remote_t *rp;
-
if (noise_consume_initiation
- (wmp->vlib_main, &wg_if->local, &rp, message->sender_index,
- message->unencrypted_ephemeral, message->encrypted_static,
- message->encrypted_timestamp))
+ (vm, noise_local_get (wg_if->local_idx), &rp,
+ message->sender_index, message->unencrypted_ephemeral,
+ message->encrypted_static, message->encrypted_timestamp))
{
- peer = pool_elt_at_index (wmp->peers, rp->r_peer_idx);
+ peer = wg_peer_get (rp->r_peer_idx);
+ }
+ else
+ {
+ return WG_INPUT_ERROR_PEER;
}
-
- if (!peer)
- return WG_INPUT_ERROR_PEER;
// set_peer_address (peer, ip4_src, udp_src_port);
if (PREDICT_FALSE (!wg_send_handshake_response (vm, peer)))
message_handshake_response_t *resp = current_b_data;
u32 *entry =
wg_index_table_lookup (&wmp->index_table, resp->receiver_index);
- if (entry)
+
+ if (PREDICT_TRUE (entry != NULL))
{
- peer = pool_elt_at_index (wmp->peers, *entry);
- if (!peer || peer->is_dead)
+ peer = wg_peer_get (*entry);
+ if (peer->is_dead)
return WG_INPUT_ERROR_PEER;
}
+ else
+ return WG_INPUT_ERROR_PEER;
if (!noise_consume_response
- (wmp->vlib_main, &peer->remote, resp->sender_index,
+ (vm, &peer->remote, resp->sender_index,
resp->receiver_index, resp->unencrypted_ephemeral,
resp->encrypted_nothing))
{
}
// set_peer_address (peer, ip4_src, udp_src_port);
- if (noise_remote_begin_session (wmp->vlib_main, &peer->remote))
+ if (noise_remote_begin_session (vm, &peer->remote))
{
+
wg_timers_session_derived (peer);
wg_timers_handshake_complete (peer);
if (PREDICT_FALSE (!wg_send_keepalive (vm, peer)))
u32 *from;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 nexts[VLIB_FRAME_SIZE], *next;
+ u32 thread_index = vm->thread_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next[0] = WG_INPUT_NEXT_PUNT;
header_type =
((message_header_t *) vlib_buffer_get_current (b[0]))->type;
+ u32 *peer_idx;
- switch (header_type)
+ if (PREDICT_TRUE (header_type == MESSAGE_DATA))
{
- case MESSAGE_HANDSHAKE_INITIATION:
- case MESSAGE_HANDSHAKE_RESPONSE:
- case MESSAGE_HANDSHAKE_COOKIE:
- {
- wg_input_error_t ret = wg_handshake_process (vm, wmp, b[0]);
- if (ret != WG_INPUT_ERROR_NONE)
- {
- next[0] = WG_INPUT_NEXT_ERROR;
- b[0]->error = node->errors[ret];
- }
- break;
- }
- case MESSAGE_DATA:
- {
- message_data_t *data = vlib_buffer_get_current (b[0]);
- u32 *entry =
- wg_index_table_lookup (&wmp->index_table, data->receiver_index);
-
- if (entry)
- {
- peer = pool_elt_at_index (wmp->peers, *entry);
- }
- else
- {
- next[0] = WG_INPUT_NEXT_ERROR;
- b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
- goto out;
- }
+ message_data_t *data = vlib_buffer_get_current (b[0]);
- u16 encr_len = b[0]->current_length - sizeof (message_data_t);
- u16 decr_len = encr_len - NOISE_AUTHTAG_LEN;
- u8 *decr_data = clib_mem_alloc (decr_len);
+ peer_idx = wg_index_table_lookup (&wmp->index_table,
+ data->receiver_index);
- enum noise_state_crypt state_cr =
- noise_remote_decrypt (wmp->vlib_main,
- &peer->remote,
- data->receiver_index,
- data->counter,
- data->encrypted_data,
- encr_len,
- decr_data);
+ if (peer_idx)
+ {
+ peer = wg_peer_get (*peer_idx);
+ }
+ else
+ {
+ next[0] = WG_INPUT_NEXT_ERROR;
+ b[0]->error = node->errors[WG_INPUT_ERROR_PEER];
+ goto out;
+ }
- switch (state_cr)
- {
- case SC_OK:
- break;
- case SC_CONN_RESET:
- wg_timers_handshake_complete (peer);
- break;
- case SC_KEEP_KEY_FRESH:
- if (PREDICT_FALSE (!wg_send_handshake (vm, peer, false)))
- {
- vlib_node_increment_counter (vm, wg_input_node.index,
- WG_INPUT_ERROR_HANDSHAKE_SEND,
- 1);
- }
- break;
- case SC_FAILED:
- next[0] = WG_INPUT_NEXT_ERROR;
- b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
- goto out;
- default:
- break;
- }
+ if (PREDICT_FALSE (~0 == peer->input_thread_index))
+ {
+ /* this is the first packet to use this peer, claim the peer
+ * for this thread.
+ */
+ clib_atomic_cmp_and_swap (&peer->input_thread_index, ~0,
+ wg_peer_assign_thread (thread_index));
+ }
- clib_memcpy (vlib_buffer_get_current (b[0]), decr_data, decr_len);
- b[0]->current_length = decr_len;
- b[0]->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+ if (PREDICT_TRUE (thread_index != peer->input_thread_index))
+ {
+ next[0] = WG_INPUT_NEXT_HANDOFF_DATA;
+ goto next;
+ }
- clib_mem_free (decr_data);
+ 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))
+ {
+ b[0]->error = node->errors[WG_INPUT_ERROR_TOO_BIG];
+ goto out;
+ }
- wg_timers_any_authenticated_packet_received (peer);
- wg_timers_any_authenticated_packet_traversal (peer);
+ u8 *decr_data = wmp->per_thread_data[thread_index].data;
- if (decr_len == 0)
- {
- is_keepalive = true;
- goto out;
- }
+ enum noise_state_crypt state_cr = noise_remote_decrypt (vm,
+ &peer->remote,
+ data->receiver_index,
+ data->counter,
+ data->encrypted_data,
+ encr_len,
+ decr_data);
- wg_timers_data_received (peer);
+ if (PREDICT_FALSE (state_cr == SC_CONN_RESET))
+ {
+ wg_timers_handshake_complete (peer);
+ }
+ else if (PREDICT_FALSE (state_cr == SC_KEEP_KEY_FRESH))
+ {
+ wg_send_handshake_from_mt (*peer_idx, false);
+ }
+ else if (PREDICT_FALSE (state_cr == SC_FAILED))
+ {
+ next[0] = WG_INPUT_NEXT_ERROR;
+ b[0]->error = node->errors[WG_INPUT_ERROR_DECRYPTION];
+ goto out;
+ }
- ip4_header_t *iph = vlib_buffer_get_current (b[0]);
+ clib_memcpy (vlib_buffer_get_current (b[0]), decr_data, decr_len);
+ b[0]->current_length = decr_len;
+ b[0]->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
- const wg_peer_allowed_ip_t *allowed_ip;
- bool allowed = false;
+ wg_timers_any_authenticated_packet_received (peer);
+ wg_timers_any_authenticated_packet_traversal (peer);
- /*
- * 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
- */
- vec_foreach (allowed_ip, peer->allowed_ips)
+ /* Keepalive packet has zero length */
+ if (decr_len == 0)
{
- if (fib_prefix_is_cover_addr_4 (&allowed_ip->prefix,
- &iph->src_address))
- {
- allowed = true;
- break;
- }
+ is_keepalive = true;
+ goto out;
}
- if (allowed)
+
+ wg_timers_data_received (peer);
+
+ ip4_header_t *iph = vlib_buffer_get_current (b[0]);
+
+ const wg_peer_allowed_ip_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 fater than an ACL
+ */
+ vec_foreach (allowed_ip, peer->allowed_ips)
+ {
+ if (fib_prefix_is_cover_addr_4 (&allowed_ip->prefix,
+ &iph->src_address))
{
- vnet_buffer (b[0])->sw_if_index[VLIB_RX] =
- peer->wg_sw_if_index;
- next[0] = WG_INPUT_NEXT_IP4_INPUT;
+ allowed = true;
+ break;
}
- break;
}
- default:
- break;
+ if (allowed)
+ {
+ vnet_buffer (b[0])->sw_if_index[VLIB_RX] = peer->wg_sw_if_index;
+ next[0] = WG_INPUT_NEXT_IP4_INPUT;
+ }
+ }
+ else
+ {
+ peer_idx = NULL;
+
+ /* Handshake packets should be processed in main thread */
+ if (thread_index != 0)
+ {
+ next[0] = WG_INPUT_NEXT_HANDOFF_HANDSHAKE;
+ goto next;
+ }
+
+ wg_input_error_t ret = wg_handshake_process (vm, wmp, b[0]);
+ if (ret != WG_INPUT_ERROR_NONE)
+ {
+ next[0] = WG_INPUT_NEXT_ERROR;
+ b[0]->error = node->errors[ret];
+ }
}
out:
t->type = header_type;
t->current_length = b[0]->current_length;
t->is_keepalive = is_keepalive;
+ t->peer = peer_idx ? *peer_idx : INDEX_INVALID;
}
+ next:
n_left_from -= 1;
next += 1;
b += 1;
.n_next_nodes = WG_INPUT_N_NEXT,
/* edit / add dispositions here */
.next_nodes = {
+ [WG_INPUT_NEXT_HANDOFF_HANDSHAKE] = "wg-handshake-handoff",
+ [WG_INPUT_NEXT_HANDOFF_DATA] = "wg-input-data-handoff",
[WG_INPUT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
[WG_INPUT_NEXT_PUNT] = "error-punt",
[WG_INPUT_NEXT_ERROR] = "error-drop",
Code Review / vpp.git / blobdiff