npt66: checksum applied to src address instead of dst address on rx

[vpp.git] / src / plugins / wireguard / wireguard_timer.c

diff --git a/src/plugins/wireguard/wireguard_timer.c b/src/plugins/wireguard/wireguard_timer.c
old mode 100755 (executable)
new mode 100644 (file)
index b7fd689..4319d53
--- a/src/plugins/wireguard/wireguard_timer.c
+++ b/src/plugins/wireguard/wireguard_timer.c
@@ -26,6 +26,13 @@ get_random_u32_max (u32 max)
   return random_u32 (&seed) % max;
 }
 
+static u32
+get_random_u32_max_opt (u32 max, f64 time)
+{
+  u32 seed = (u32) (time * 1e6);
+  return random_u32 (&seed) % max;
+}
+
 static void
 stop_timer (wg_peer_t * peer, u32 timer_id)
 {
@@ -62,12 +69,11 @@ start_timer_thread_fn (void *arg)
 {
   wg_timers_args *a = arg;
   wg_peer_t *peer = wg_peer_get (a->peer_idx);
-
   start_timer (peer, a->timer_id, a->interval_ticks);
   return 0;
 }
 
-static void
+static_always_inline void
 start_timer_from_mt (u32 peer_idx, u32 timer_id, u32 interval_ticks)
 {
   wg_timers_args a = {
@@ -75,8 +81,11 @@ start_timer_from_mt (u32 peer_idx, u32 timer_id, u32 interval_ticks)
     .timer_id = timer_id,
     .interval_ticks = interval_ticks,
   };
-
-  vl_api_rpc_call_main_thread (start_timer_thread_fn, (u8 *) & a, sizeof (a));
+  wg_peer_t *peer = wg_peer_get (peer_idx);
+  if (PREDICT_FALSE (!peer->timers_dispatched[timer_id]))
+    if (!clib_atomic_cmp_and_swap (&peer->timers_dispatched[timer_id], 0, 1))
+      vl_api_rpc_call_main_thread (start_timer_thread_fn, (u8 *) &a,
+                                  sizeof (a));
 }
 
 static inline u32
@@ -189,14 +198,14 @@ wg_expired_zero_key_material (vlib_main_t * vm, wg_peer_t * peer)
       return;
     }
 
-  if (!peer->is_dead)
+  if (!wg_peer_is_dead (peer))
     {
       noise_remote_clear (vm, &peer->remote);
     }
 }
 
-void
-wg_timers_any_authenticated_packet_traversal (wg_peer_t * peer)
+inline void
+wg_timers_any_authenticated_packet_traversal (wg_peer_t *peer)
 {
   if (peer->persistent_keepalive_interval)
     {
@@ -212,6 +221,12 @@ wg_timers_any_authenticated_packet_sent (wg_peer_t * peer)
   peer->last_sent_packet = vlib_time_now (vlib_get_main ());
 }
 
+inline void
+wg_timers_any_authenticated_packet_sent_opt (wg_peer_t *peer, f64 time)
+{
+  peer->last_sent_packet = time;
+}
+
 void
 wg_timers_handshake_initiated (wg_peer_t * peer)
 {
@@ -223,6 +238,16 @@ wg_timers_handshake_initiated (wg_peer_t * peer)
                       peer->rehandshake_interval_tick);
 }
 
+void
+wg_timers_send_first_handshake (wg_peer_t *peer)
+{
+  // zero value is not allowed
+  peer->new_handshake_interval_tick =
+    get_random_u32_max (REKEY_TIMEOUT_JITTER) + 1;
+  start_timer_from_mt (peer - wg_peer_pool, WG_TIMER_NEW_HANDSHAKE,
+                      peer->new_handshake_interval_tick);
+}
+
 void
 wg_timers_session_derived (wg_peer_t * peer)
 {
@@ -244,6 +269,17 @@ wg_timers_data_sent (wg_peer_t * peer)
                       peer->new_handshake_interval_tick);
 }
 
+inline void
+wg_timers_data_sent_opt (wg_peer_t *peer, f64 time)
+{
+  peer->new_handshake_interval_tick =
+    (KEEPALIVE_TIMEOUT + REKEY_TIMEOUT) * WHZ +
+    get_random_u32_max_opt (REKEY_TIMEOUT_JITTER, time);
+
+  start_timer_from_mt (peer - wg_peer_pool, WG_TIMER_NEW_HANDSHAKE,
+                      peer->new_handshake_interval_tick);
+}
+
 /* Should be called after an authenticated data packet is received. */
 void
 wg_timers_data_received (wg_peer_t * peer)
@@ -273,6 +309,12 @@ wg_timers_any_authenticated_packet_received (wg_peer_t * peer)
   peer->last_received_packet = vlib_time_now (vlib_get_main ());
 }
 
+inline void
+wg_timers_any_authenticated_packet_received_opt (wg_peer_t *peer, f64 time)
+{
+  peer->last_received_packet = time;
+}
+
 static vlib_node_registration_t wg_timer_mngr_node;
 
 static void
@@ -295,6 +337,9 @@ expired_timer_callback (u32 * expired_timers)
 
       peer = wg_peer_get (pool_index);
       peer->timers[timer_id] = ~0;
+
+      /* Under barrier, no sync needed */
+      peer->timers_dispatched[timer_id] = 0;
     }
 
   for (i = 0; i < vec_len (expired_timers); i++)
@@ -334,7 +379,6 @@ wg_timer_wheel_init ()
   tw_timer_wheel_init_16t_2w_512sl (tw,
                                    expired_timer_callback,
                                    WG_TICK /* timer period in s */ , ~0);
-  tw->last_run_time = vlib_time_now (wmp->vlib_main);
 }
 
 static uword
@@ -342,6 +386,28 @@ wg_timer_mngr_fn (vlib_main_t * vm, vlib_node_runtime_t * rt,
                  vlib_frame_t * f)
 {
   wg_main_t *wmp = &wg_main;
+  uword event_type = 0;
+
+  /* Park the process until the feature is configured */
+  while (1)
+    {
+      vlib_process_wait_for_event (vm);
+      event_type = vlib_process_get_events (vm, 0);
+      if (event_type == WG_START_EVENT)
+       {
+         break;
+       }
+      else
+       {
+         clib_warning ("Unknown event type %d", event_type);
+       }
+    }
+  /*
+   * Reset the timer wheel time so it won't try to
+   * expire Avogadro's number of time slots.
+   */
+  wmp->timer_wheel.last_run_time = vlib_time_now (vm);
+
   while (1)
     {
       vlib_process_wait_for_event_or_clock (vm, WG_TICK);
@@ -377,6 +443,18 @@ VLIB_REGISTER_NODE (wg_timer_mngr_node, static) = {
 };
 /* *INDENT-ON* */
 
+void
+wg_feature_init (wg_main_t * wmp)
+{
+  if (wmp->feature_init)
+    return;
+  vlib_process_signal_event (wmp->vlib_main, wg_timer_mngr_node.index,
+                            WG_START_EVENT, 0);
+  wmp->feature_init = 1;
+}
+
+
+
 /*
  * fd.io coding-style-patch-verification: ON
  *