wireguard: initial implementation of wireguard protocol

Type: feature

The main information about plugin you can see in README.md

vpp# wireguard ?
  wireguard create                         wireguard create listen-port <port> private-key <key> src <IP> [generate-key]
  wireguard delete                         wireguard delete <interface>
  wireguard peer add                       wireguard peer add <wg_int> public-key <pub_key_other>endpoint <ip4_dst> allowed-ip <prefix>dst-port [port_dst] persistent-keepalive [keepalive_interval]
  wireguard peer remove                    wireguard peer remove <index>

Change-Id: I85eb0bfc033ccfb2045696398d8a108b1c64b8d9
Signed-off-by: Artem Glazychev <artem.glazychev@xored.com>
Signed-off-by: Damjan Marion <damarion@cisco.com>
Signed-off-by: Jim Thompson <jim@netgate.com>
Signed-off-by: Neale Ranns <nranns@cisco.com>
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/src/plugins/wireguard/wireguard_peer.h b/src/plugins/wireguard/wireguard_peer.h
new file mode 100755
index 00000000000..99c73f3a0ed
--- /dev/null
+++ b/src/plugins/wireguard/wireguard_peer.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2020 Doc.ai 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:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __included_wg_peer_h__
+#define __included_wg_peer_h__
+
+#include <vnet/ip/ip.h>
+
+#include <wireguard/wireguard_cookie.h>
+#include <wireguard/wireguard_timer.h>
+#include <wireguard/wireguard_key.h>
+#include <wireguard/wireguard_messages.h>
+#include <wireguard/wireguard_if.h>
+
+typedef struct ip4_udp_header_t_
+{
+  ip4_header_t ip4;
+  udp_header_t udp;
+} __clib_packed ip4_udp_header_t;
+
+u8 *format_ip4_udp_header (u8 * s, va_list * va);
+
+typedef struct wg_peer_allowed_ip_t_
+{
+  fib_prefix_t prefix;
+  fib_node_index_t fib_entry_index;
+} wg_peer_allowed_ip_t;
+
+typedef struct wg_peer_endpoint_t_
+{
+  ip46_address_t addr;
+  u16 port;
+} wg_peer_endpoint_t;
+
+typedef struct wg_peer
+{
+  noise_remote_t remote;
+  cookie_maker_t cookie_maker;
+
+  /* Peer addresses */
+  wg_peer_endpoint_t dst;
+  wg_peer_endpoint_t src;
+  u32 table_id;
+  adj_index_t adj_index;
+
+  /* rewrite built from address information */
+  u8 *rewrite;
+
+  /* Vector of allowed-ips */
+  wg_peer_allowed_ip_t *allowed_ips;
+
+  /* The WG interface this peer is attached to */
+  u32 wg_sw_if_index;
+
+  /* Timers */
+  tw_timer_wheel_16t_2w_512sl_t timer_wheel;
+  u32 timers[WG_N_TIMERS];
+  u32 timer_handshake_attempts;
+  u16 persistent_keepalive_interval;
+  f64 last_sent_handshake;
+  bool timer_need_another_keepalive;
+
+  bool is_dead;
+} wg_peer_t;
+
+typedef struct wg_peer_table_bind_ctx_t_
+{
+  ip_address_family_t af;
+  u32 new_fib_index;
+  u32 old_fib_index;
+} wg_peer_table_bind_ctx_t;
+
+int wg_peer_add (u32 tun_sw_if_index,
+		 const u8 public_key_64[NOISE_PUBLIC_KEY_LEN],
+		 u32 table_id,
+		 const ip46_address_t * endpoint,
+		 const fib_prefix_t * allowed_ips,
+		 u16 port, u16 persistent_keepalive, index_t * peer_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);
+
+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);
+
+/*
+ * Expoed for the data-plane
+ */
+extern index_t *wg_peer_by_adj_index;
+
+static inline wg_peer_t *
+wg_peer_get_by_adj_index (index_t ai)
+{
+  return wg_peer_get (wg_peer_by_adj_index[ai]);
+}
+
+#endif // __included_wg_peer_h__
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */