wireguard: add peers roaming support

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

diff --git a/src/plugins/wireguard/wireguard_peer.h b/src/plugins/wireguard/wireguard_peer.h
index e23feb7..c07ea89 100644 (file)
--- a/src/plugins/wireguard/wireguard_peer.h
+++ b/src/plugins/wireguard/wireguard_peer.h
@@ -17,6 +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>
@@ -31,7 +33,28 @@ typedef struct ip4_udp_header_t_
   udp_header_t udp;
 } __clib_packed ip4_udp_header_t;
 
+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 ip6_udp_header_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_
 {
@@ -39,6 +62,19 @@ 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_adj_t_
+{
+  adj_index_t adj_index;
+  fib_node_index_t fib_entry_index;
+  u32 sibling_index;
+} wg_peer_adj_t;
+
 typedef struct wg_peer
 {
   noise_remote_t remote;
@@ -51,7 +87,7 @@ typedef struct wg_peer
   wg_peer_endpoint_t dst;
   wg_peer_endpoint_t src;
   u32 table_id;
-  adj_index_t *adj_indices;
+  wg_peer_adj_t *adjs;
 
   /* rewrite built from address information */
   u8 *rewrite;
@@ -62,6 +98,11 @@ typedef struct wg_peer
   /* 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;
   u32 timers[WG_N_TIMERS];
@@ -81,8 +122,6 @@ typedef struct wg_peer
   u32 rehandshake_interval_tick;
 
   bool timer_need_another_keepalive;
-
-  bool is_dead;
 } wg_peer_t;
 
 typedef struct wg_peer_table_bind_ctx_t_
@@ -110,6 +149,19 @@ 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);
+void wg_peer_update_endpoint (index_t peeri, const ip46_address_t *addr,
+                             u16 port);
+void wg_peer_update_endpoint_from_mt (index_t peeri,
+                                     const ip46_address_t *addr, u16 port);
+
+static inline bool
+wg_peer_is_dead (wg_peer_t *peer)
+{
+  return peer && peer->flags & WG_PEER_STATUS_DEAD;
+}
+
 /*
  * Expoed for the data-plane
  */
@@ -125,6 +177,8 @@ wg_peer_get (index_t peeri)
 static inline index_t
 wg_peer_get_by_adj_index (index_t ai)
 {
+  if (ai >= vec_len (wg_peer_by_adj_index))
+    return INDEX_INVALID;
   return (wg_peer_by_adj_index[ai]);
 }
 
@@ -141,21 +195,28 @@ wg_peer_assign_thread (u32 thread_id)
 }
 
 static_always_inline bool
-fib_prefix_is_cover_addr_4 (const fib_prefix_t *p1, const ip4_address_t *ip4)
+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, ip4,
-                                            p1->fp_len) != 0);
+      return (ip4_destination_matches_route (&ip4_main, &p1->fp_addr.ip4,
+                                            &ip->ip4, p1->fp_len) != 0);
     case FIB_PROTOCOL_IP6:
-      return (false);
+      return (ip6_destination_matches_route (&ip6_main, &p1->fp_addr.ip6,
+                                            &ip->ip6, p1->fp_len) != 0);
     case FIB_PROTOCOL_MPLS:
       break;
     }
   return (false);
 }
 
+static inline bool
+wg_peer_can_send (wg_peer_t *peer)
+{
+  return peer && peer->rewrite;
+}
+
 #endif // __included_wg_peer_h__
 
 /*