ipip: Multi-point interface

[vpp.git] / src / vnet / gre / gre.c

diff --git a/src/vnet/gre/gre.c b/src/vnet/gre/gre.c
index 72c76fc..2b95d99 100644 (file)
--- a/src/vnet/gre/gre.c
+++ b/src/vnet/gre/gre.c
@@ -213,6 +213,7 @@ gre_build_rewrite (vnet_main_t * vnm,
                   vnet_link_t link_type, const void *dst_address)
 {
   gre_main_t *gm = &gre_main;
+  const ip46_address_t *dst;
   ip4_and_gre_header_t *h4;
   ip6_and_gre_header_t *h6;
   gre_header_t *gre;
@@ -221,6 +222,7 @@ gre_build_rewrite (vnet_main_t * vnm,
   u32 ti;
   u8 is_ipv6;
 
+  dst = dst_address;
   ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
 
   if (~0 == ti)
@@ -241,7 +243,7 @@ gre_build_rewrite (vnet_main_t * vnm,
       h4->ip4.protocol = IP_PROTOCOL_GRE;
       /* fixup ip4 header length and checksum after-the-fact */
       h4->ip4.src_address.as_u32 = t->tunnel_src.ip4.as_u32;
-      h4->ip4.dst_address.as_u32 = t->tunnel_dst.fp_addr.ip4.as_u32;
+      h4->ip4.dst_address.as_u32 = dst->ip4.as_u32;
       h4->ip4.checksum = ip4_header_checksum (&h4->ip4);
     }
   else
@@ -256,8 +258,8 @@ gre_build_rewrite (vnet_main_t * vnm,
       /* fixup ip6 header length and checksum after-the-fact */
       h6->ip6.src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0];
       h6->ip6.src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1];
-      h6->ip6.dst_address.as_u64[0] = t->tunnel_dst.fp_addr.ip6.as_u64[0];
-      h6->ip6.dst_address.as_u64[1] = t->tunnel_dst.fp_addr.ip6.as_u64[1];
+      h6->ip6.dst_address.as_u64[0] = dst->ip6.as_u64[0];
+      h6->ip6.dst_address.as_u64[1] = dst->ip6.as_u64[1];
     }
 
   if (PREDICT_FALSE (t->type == GRE_TUNNEL_TYPE_ERSPAN))
@@ -276,7 +278,7 @@ gre_build_rewrite (vnet_main_t * vnm,
 
 static void
 gre4_fixup (vlib_main_t * vm,
-           ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+           const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
 {
   ip4_header_t *ip0;
 
@@ -290,7 +292,7 @@ gre4_fixup (vlib_main_t * vm,
 
 static void
 gre6_fixup (vlib_main_t * vm,
-           ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+           const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
 {
   ip6_header_t *ip0;
 
@@ -322,10 +324,75 @@ gre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
 
   adj_nbr_midchain_update_rewrite
     (ai, !is_ipv6 ? gre4_fixup : gre6_fixup, NULL, af,
-     gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai), NULL));
+     gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai),
+                       &t->tunnel_dst.fp_addr));
 
   gre_tunnel_stack (ai);
 }
+
+adj_walk_rc_t
+mgre_mk_complete_walk (adj_index_t ai, void *data)
+{
+  mgre_walk_ctx_t *ctx = data;
+  adj_midchain_fixup_t f;
+
+  f = (ctx->t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP4 ?
+       gre4_fixup : gre6_fixup);
+
+  adj_nbr_midchain_update_rewrite
+    (ai, f, NULL, ADJ_FLAG_MIDCHAIN_IP_STACK,
+     gre_build_rewrite (vnet_get_main (),
+                       ctx->t->sw_if_index,
+                       adj_get_link_type (ai),
+                       &nhrp_entry_get_nh (ctx->ne)->fp_addr));
+
+  nhrp_entry_adj_stack (ctx->ne, ai);
+
+  return (ADJ_WALK_RC_CONTINUE);
+}
+
+adj_walk_rc_t
+mgre_mk_incomplete_walk (adj_index_t ai, void *data)
+{
+  gre_tunnel_t *t = data;
+  adj_midchain_fixup_t f;
+
+  f = (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP4 ? gre4_fixup : gre6_fixup);
+
+  adj_nbr_midchain_update_rewrite (ai, f, NULL, ADJ_FLAG_NONE, NULL);
+
+  adj_midchain_delegate_unstack (ai);
+
+  return (ADJ_WALK_RC_CONTINUE);
+}
+
+void
+mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
+{
+  gre_main_t *gm = &gre_main;
+  ip_adjacency_t *adj;
+  nhrp_entry_t *ne;
+  gre_tunnel_t *t;
+  u32 ti;
+
+  adj = adj_get (ai);
+  ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
+  t = pool_elt_at_index (gm->tunnels, ti);
+
+  ne = nhrp_entry_find (sw_if_index, &adj->sub_type.nbr.next_hop);
+
+  if (NULL == ne)
+    // no NHRP entry to provide the next-hop
+    return;
+
+  mgre_walk_ctx_t ctx = {
+    .t = t,
+    .ne = ne
+  };
+  adj_nbr_walk_nh (sw_if_index,
+                  adj->ia_nh_proto,
+                  &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, &ctx);
+}
 #endif /* CLIB_MARCH_VARIANT */
 
 typedef enum
@@ -530,6 +597,29 @@ format_gre_device (u8 * s, va_list * args)
   return s;
 }
 
+static int
+gre_tunnel_desc (u32 sw_if_index,
+                ip46_address_t * src, ip46_address_t * dst, u8 * is_l2)
+{
+  gre_main_t *gm = &gre_main;
+  gre_tunnel_t *t;
+  u32 ti;
+
+  ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
+
+  if (~0 == ti)
+    /* not one of ours */
+    return -1;
+
+  t = pool_elt_at_index (gm->tunnels, ti);
+
+  *src = t->tunnel_src;
+  *dst = t->tunnel_dst.fp_addr;
+  *is_l2 = t->type == GRE_TUNNEL_TYPE_TEB;
+
+  return (0);
+}
+
 /* *INDENT-OFF* */
 VNET_DEVICE_CLASS (gre_device_class) = {
   .name = "GRE tunnel device",
@@ -537,6 +627,7 @@ VNET_DEVICE_CLASS (gre_device_class) = {
   .format_device = format_gre_device,
   .format_tx_trace = format_gre_tx_trace,
   .admin_up_down_function = gre_interface_admin_up_down,
+  .ip_tun_desc = gre_tunnel_desc,
 #ifdef SOON
   .clear counter = 0;
 #endif
@@ -550,6 +641,15 @@ VNET_HW_INTERFACE_CLASS (gre_hw_interface_class) = {
   .update_adjacency = gre_update_adj,
   .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
 };
+
+VNET_HW_INTERFACE_CLASS (mgre_hw_interface_class) = {
+  .name = "mGRE",
+  .format_header = format_gre_header_with_length,
+  .unformat_header = unformat_gre_header,
+  .build_rewrite = gre_build_rewrite,
+  .update_adjacency = mgre_update_adj,
+  .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA,
+};
 /* *INDENT-ON* */
 #endif /* CLIB_MARCH_VARIANT */