wireguard: fix crash by not sending arp via wg interface

[vpp.git] / src / plugins / wireguard / wireguard_peer.h

diff --git a/src/plugins/wireguard/wireguard_peer.h b/src/plugins/wireguard/wireguard_peer.h
old mode 100755 (executable)
new mode 100644 (file)
index 99c73f3..a14f269
--- a/src/plugins/wireguard/wireguard_peer.h
+++ b/src/plugins/wireguard/wireguard_peer.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2020 Doc.ai and/or its affiliates.
+ * Copyright (c) 2020 Cisco and/or its affiliates.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
@@ -16,6 +17,8 @@
 #ifndef __included_wg_peer_h__
 #define __included_wg_peer_h__
 
+#include <vlibapi/api_helper_macros.h>
+
 #include <vnet/ip/ip.h>
 
 #include <wireguard/wireguard_cookie.h>
@@ -30,13 +33,28 @@ typedef struct ip4_udp_header_t_
   udp_header_t udp;
 } __clib_packed ip4_udp_header_t;
 
-u8 *format_ip4_udp_header (u8 * s, va_list * va);
+typedef struct ip4_udp_wg_header_t_
+{
+  ip4_header_t ip4;
+  udp_header_t udp;
+  message_data_t wg;
+} __clib_packed ip4_udp_wg_header_t;
 
-typedef struct wg_peer_allowed_ip_t_
+typedef struct ip6_udp_header_t_
 {
-  fib_prefix_t prefix;
-  fib_node_index_t fib_entry_index;
-} wg_peer_allowed_ip_t;
+  ip6_header_t ip6;
+  udp_header_t udp;
+} __clib_packed ip6_udp_header_t;
+
+typedef struct ip6_udp_wg_header_t_
+{
+  ip6_header_t ip6;
+  udp_header_t udp;
+  message_data_t wg;
+} __clib_packed ip6_udp_wg_header_t;
+
+u8 *format_ip4_udp_header (u8 * s, va_list * va);
+u8 *format_ip6_udp_header (u8 *s, va_list *va);
 
 typedef struct wg_peer_endpoint_t_
 {
@@ -44,35 +62,59 @@ typedef struct wg_peer_endpoint_t_
   u16 port;
 } wg_peer_endpoint_t;
 
+typedef enum
+{
+  WG_PEER_STATUS_DEAD = 0x1,
+  WG_PEER_ESTABLISHED = 0x2,
+} wg_peer_flags;
+
 typedef struct wg_peer
 {
   noise_remote_t remote;
   cookie_maker_t cookie_maker;
 
+  u32 input_thread_index;
+  u32 output_thread_index;
+
   /* Peer addresses */
   wg_peer_endpoint_t dst;
   wg_peer_endpoint_t src;
   u32 table_id;
-  adj_index_t adj_index;
+  adj_index_t *adj_indices;
 
   /* rewrite built from address information */
   u8 *rewrite;
 
   /* Vector of allowed-ips */
-  wg_peer_allowed_ip_t *allowed_ips;
+  fib_prefix_t *allowed_ips;
 
   /* The WG interface this peer is attached to */
   u32 wg_sw_if_index;
 
+  /* API client registered for events */
+  vpe_client_registration_t *api_clients;
+  uword *api_client_by_client_index;
+  wg_peer_flags flags;
+
   /* Timers */
-  tw_timer_wheel_16t_2w_512sl_t timer_wheel;
+  tw_timer_wheel_16t_2w_512sl_t *timer_wheel;
   u32 timers[WG_N_TIMERS];
+  u8 timers_dispatched[WG_N_TIMERS];
   u32 timer_handshake_attempts;
   u16 persistent_keepalive_interval;
+
+  /* Timestamps */
   f64 last_sent_handshake;
-  bool timer_need_another_keepalive;
+  f64 last_sent_packet;
+  f64 last_received_packet;
+  f64 session_derived;
+  f64 rehandshake_started;
 
-  bool is_dead;
+  /* Variable intervals */
+  u32 new_handshake_interval_tick;
+  u32 rehandshake_interval_tick;
+
+  bool timer_need_another_keepalive;
 } wg_peer_t;
 
 typedef struct wg_peer_table_bind_ctx_t_
@@ -91,24 +133,71 @@ int wg_peer_add (u32 tun_sw_if_index,
 int wg_peer_remove (u32 peer_index);
 
 typedef walk_rc_t (*wg_peer_walk_cb_t) (index_t peeri, void *arg);
-void wg_peer_walk (wg_peer_walk_cb_t fn, void *data);
+index_t wg_peer_walk (wg_peer_walk_cb_t fn, void *data);
 
 u8 *format_wg_peer (u8 * s, va_list * va);
-wg_peer_t *wg_peer_get (index_t peeri);
 
-walk_rc_t wg_peer_if_admin_state_change (wg_if_t * wgi, index_t peeri,
-                                        void *data);
-walk_rc_t wg_peer_if_table_change (wg_if_t * wgi, index_t peeri, void *data);
+walk_rc_t wg_peer_if_admin_state_change (index_t peeri, void *data);
+walk_rc_t wg_peer_if_delete (index_t peeri, void *data);
+walk_rc_t wg_peer_if_adj_change (index_t peeri, void *data);
+adj_walk_rc_t wg_peer_adj_walk (adj_index_t ai, void *data);
+
+void wg_api_peer_event (index_t peeri, wg_peer_flags flags);
+void wg_peer_update_flags (index_t peeri, wg_peer_flags flag, bool add_del);
+
+static inline bool
+wg_peer_is_dead (wg_peer_t *peer)
+{
+  return peer && peer->flags & WG_PEER_STATUS_DEAD;
+}
 
 /*
  * Expoed for the data-plane
  */
 extern index_t *wg_peer_by_adj_index;
+extern wg_peer_t *wg_peer_pool;
 
 static inline wg_peer_t *
+wg_peer_get (index_t peeri)
+{
+  return (pool_elt_at_index (wg_peer_pool, peeri));
+}
+
+static inline index_t
 wg_peer_get_by_adj_index (index_t ai)
 {
-  return wg_peer_get (wg_peer_by_adj_index[ai]);
+  if (ai >= vec_len (wg_peer_by_adj_index))
+    return INDEX_INVALID;
+  return (wg_peer_by_adj_index[ai]);
+}
+
+/*
+ * Makes choice for thread_id should be assigned.
+*/
+static inline u32
+wg_peer_assign_thread (u32 thread_id)
+{
+  return ((thread_id) ? thread_id
+         : (vlib_num_workers ()?
+            ((unix_time_now_nsec () % vlib_num_workers ()) +
+             1) : thread_id));
+}
+
+static_always_inline bool
+fib_prefix_is_cover_addr_46 (const fib_prefix_t *p1, const ip46_address_t *ip)
+{
+  switch (p1->fp_proto)
+    {
+    case FIB_PROTOCOL_IP4:
+      return (ip4_destination_matches_route (&ip4_main, &p1->fp_addr.ip4,
+                                            &ip->ip4, p1->fp_len) != 0);
+    case FIB_PROTOCOL_IP6:
+      return (ip6_destination_matches_route (&ip6_main, &p1->fp_addr.ip6,
+                                            &ip->ip6, p1->fp_len) != 0);
+    case FIB_PROTOCOL_MPLS:
+      break;
+    }
+  return (false);
 }
 
 #endif // __included_wg_peer_h__