Wireguard: Add tunnel_type config parameter

Use 51820 (default wireguard port) as default tunnel type.

3 files changed, 11 insertions, 6 deletions

diff --git a/proto/wireguard/config.Y b/proto/wireguard/config.Y
index dceebb67..6d3b1ef6 100644
--- a/proto/wireguard/config.Y
+++ b/proto/wireguard/config.Y
@@ -12,13 +12,15 @@ CF_HDR
 
 CF_DEFINES
 
+#define WG_DEFAULT_TUNNEL_TYPE 51820
+
 #define WG_CFG ((struct wg_config *) this_proto)
 
 static struct peer_config *this_peer = NULL;
 
 CF_DECLS
 
-CF_KEYWORDS(WIREGUARD, PRIVATE_KEY, LISTEN_PORT, PUBLIC_KEY, ENDPOINT, ALLOWED_IP)
+CF_KEYWORDS(WIREGUARD, TUNNEL_TYPE, PRIVATE_KEY, LISTEN_PORT, PUBLIC_KEY, ENDPOINT, ALLOWED_IP)
 
 CF_GRAMMAR
 
@@ -27,6 +29,7 @@ proto: wireguard_proto '}' ;
 wireguard_proto_start: proto_start WIREGUARD {
      this_proto = proto_config_new(&proto_wireguard, $1);
      init_list(&WG_CFG->peers);
+     WG_CFG->tunnel_type = WG_DEFAULT_TUNNEL_TYPE;
   }
  ;
 
@@ -34,6 +37,7 @@ wireguard_proto:
    wireguard_proto_start proto_name '{'
  | wireguard_proto wg_proto_channel ';'
  | wireguard_proto proto_item ';'
+ | wireguard_proto TUNNEL_TYPE tunnel_type ';'
  | wireguard_proto INTERFACE TEXT ';' { WG_CFG->ifname = $3; }
  | wireguard_proto PRIVATE_KEY private_key ';'
  | wireguard_proto LISTEN_PORT listen_port ';'
@@ -66,6 +70,8 @@ wg_peer_opt_list:
  | '{' wg_peer_opts '}'
  ;
 
+tunnel_type: expr { WG_CFG->tunnel_type = $1; }
+
 private_key: text { WG_CFG->private_key = $1; }
 
 listen_port: expr { WG_CFG->listen_port = $1; }
diff --git a/proto/wireguard/wireguard.c b/proto/wireguard/wireguard.c
index f0ac45e6..f73460d5 100644
--- a/proto/wireguard/wireguard.c
+++ b/proto/wireguard/wireguard.c
@@ -402,8 +402,6 @@ dump(void *ptr, size_t len)
 #define FLAG_BGP_TUNNEL_ENCAP_A_SUB_TLV_REMOTE_EP     (1<<BGP_TUNNEL_ENCAP_A_SUB_TLV_REMOTE_EP)
 #define FLAG_BGP_TUNNEL_ENCAP_A_SUB_TLV_UDP_DEST_PORT (1<<BGP_TUNNEL_ENCAP_A_SUB_TLV_UDP_DEST_PORT)
 
-#define BGP_TUNNEL_ENCAP_A_TUNNEL_TYPE_WIREGUARD 65535
-
 static
 int decode_wireguard(const void *p, size_t sub_tlv_len, wg_key *pubkey, u16 *flags)
 {
@@ -542,7 +540,7 @@ int decode_sub_tlv(u8 *p, size_t len, wg_key *pubkey,
 }
 
 static
-int decode_tunnel_encap(const eattr *e, wg_key *pubkey, u32 *as4, ip_addr *remote_ep, u32 *color, u16 *udp_port, u16 *flags)
+int decode_tunnel_encap(const eattr *e, u16 wg_tunnel_type, wg_key *pubkey, u32 *as4, ip_addr *remote_ep, u32 *color, u16 *udp_port, u16 *flags)
 {
   u8 *p = e->u.ptr->data;
   int len = e->u.ptr->length;
@@ -556,7 +554,7 @@ int decode_tunnel_encap(const eattr *e, wg_key *pubkey, u32 *as4, ip_addr *remot
 
   log(L_DEBUG "WG: tunnel type %d", tunnel_type);
 
-  if (tunnel_type != BGP_TUNNEL_ENCAP_A_TUNNEL_TYPE_WIREGUARD) {
+  if (tunnel_type != wg_tunnel_type) {
     log(L_TRACE "WG: tunnel type error %d", tunnel_type);
     return -1;
   }
@@ -695,7 +693,7 @@ wg_rt_notify(struct proto *P, struct channel *CH, struct network *n,
       if (!t && he && he->src) {
 	t = ea_find(he->src->eattrs, EA_CODE(PROTOCOL_BGP, BA_TUNNEL_ENCAP));
       }
-      if (t && t->u.ptr && decode_tunnel_encap(t, &pubkey, &remote_ep_as4, &remote_ep_addr, &color, &udp_dest_port, &flags) == 0) {
+      if (t && t->u.ptr && decode_tunnel_encap(t, c->tunnel_type, &pubkey, &remote_ep_as4, &remote_ep_addr, &color, &udp_dest_port, &flags) == 0) {
 	log(L_TRACE "WG:     Attr %x %x %d %04x", t->flags, t->type, t->u.ptr->length, flags);
 
 	struct wg_device *dev = p->dev;
diff --git a/proto/wireguard/wireguard.h b/proto/wireguard/wireguard.h
index 69345953..c2f780ca 100644
--- a/proto/wireguard/wireguard.h
+++ b/proto/wireguard/wireguard.h
@@ -18,6 +18,7 @@ struct wg_config {
   const char *ifname;
   const char *socket_path;
   const char *private_key;
+  u16 tunnel_type;
   u16 listen_port;
   list peers;
 };