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authorNeale Ranns <nranns@cisco.com>2019-12-29 23:55:18 +0000
committerDamjan Marion <dmarion@me.com>2020-01-27 20:40:30 +0000
commit14053c9dbd75182f5302f7388d17508f3930f7ce (patch)
tree527f7675cfe18b13cc7c1923cd7959ec80459a7c /src/vnet/gre
parent59ff918ea5b86112ffc89054aa38107703354585 (diff)
ipip: Multi-point interface
Type: feature plus fixes for gre Signed-off-by: Neale Ranns <nranns@cisco.com> Change-Id: I0eca5f94b8b8ea0fcfb058162cafea4491708db6
Diffstat (limited to 'src/vnet/gre')
-rw-r--r--src/vnet/gre/gre.c53
-rw-r--r--src/vnet/gre/gre.h10
-rw-r--r--src/vnet/gre/interface.c32
3 files changed, 80 insertions, 15 deletions
diff --git a/src/vnet/gre/gre.c b/src/vnet/gre/gre.c
index f06f19fab2a..2b95d99148a 100644
--- a/src/vnet/gre/gre.c
+++ b/src/vnet/gre/gre.c
@@ -18,7 +18,6 @@
#include <vnet/vnet.h>
#include <vnet/gre/gre.h>
#include <vnet/adj/adj_midchain.h>
-#include <vnet/nhrp/nhrp.h>
extern gre_main_t gre_main;
@@ -331,10 +330,38 @@ gre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
gre_tunnel_stack (ai);
}
-static adj_walk_rc_t
-mgre_mk_complete_walk (adj_index_t ai, void *ctx)
+adj_walk_rc_t
+mgre_mk_complete_walk (adj_index_t ai, void *data)
{
- nhrp_entry_adj_stack (ctx, ai);
+ 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);
}
@@ -346,20 +373,11 @@ mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
ip_adjacency_t *adj;
nhrp_entry_t *ne;
gre_tunnel_t *t;
- adj_flags_t af;
- u8 is_ipv6;
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);
- is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
- af = ADJ_FLAG_MIDCHAIN_IP_STACK;
-
- 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),
- &adj->sub_type.nbr.next_hop));
ne = nhrp_entry_find (sw_if_index, &adj->sub_type.nbr.next_hop);
@@ -367,8 +385,13 @@ mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
// no NHRP entry to provide the next-hop
return;
- adj_nbr_walk_nh (sw_if_index, t->tunnel_dst.fp_proto,
- &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, ne);
+ 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 */
diff --git a/src/vnet/gre/gre.h b/src/vnet/gre/gre.h
index 7f6ff0be9dc..70f624122ce 100644
--- a/src/vnet/gre/gre.h
+++ b/src/vnet/gre/gre.h
@@ -25,6 +25,7 @@
#include <vnet/ip/format.h>
#include <vnet/adj/adj_types.h>
#include <vnet/tunnel/tunnel.h>
+#include <vnet/nhrp/nhrp.h>
extern vnet_hw_interface_class_t gre_hw_interface_class;
extern vnet_hw_interface_class_t mgre_hw_interface_class;
@@ -323,6 +324,15 @@ extern void gre_tunnel_stack (adj_index_t ai);
extern void gre_update_adj (vnet_main_t * vnm,
u32 sw_if_index, adj_index_t ai);
+typedef struct mgre_walk_ctx_t_
+{
+ const gre_tunnel_t *t;
+ const nhrp_entry_t *ne;
+} mgre_walk_ctx_t;
+
+adj_walk_rc_t mgre_mk_complete_walk (adj_index_t ai, void *data);
+adj_walk_rc_t mgre_mk_incomplete_walk (adj_index_t ai, void *data);
+
format_function_t format_gre_protocol;
format_function_t format_gre_header;
format_function_t format_gre_header_with_length;
diff --git a/src/vnet/gre/interface.c b/src/vnet/gre/interface.c
index 59bf21d6dc2..178b080a73b 100644
--- a/src/vnet/gre/interface.c
+++ b/src/vnet/gre/interface.c
@@ -203,10 +203,14 @@ gre_nhrp_mk_key (const gre_tunnel_t * t,
t->type, TUNNEL_MODE_P2P, 0, &key->gtk_v6);
}
+/**
+ * An NHRP entry has been added
+ */
static void
gre_nhrp_entry_added (const nhrp_entry_t * ne)
{
gre_main_t *gm = &gre_main;
+ const ip46_address_t *nh;
gre_tunnel_key_t key;
gre_tunnel_t *t;
u32 sw_if_index;
@@ -221,16 +225,35 @@ gre_nhrp_entry_added (const nhrp_entry_t * ne)
if (INDEX_INVALID == t_idx)
return;
+ /* entry has been added on an interface for which there is a GRE tunnel */
t = pool_elt_at_index (gm->tunnels, t_idx);
+ if (t->mode != TUNNEL_MODE_MP)
+ return;
+
+ /* the next-hop (underlay) of the NHRP entry will form part of the key for
+ * ingress lookup to match packets to this interface */
gre_nhrp_mk_key (t, ne, &key);
gre_tunnel_db_add (t, &key);
+
+ /* update the rewrites for each of the adjacencies for this peer (overlay)
+ * using the next-hop (underlay) */
+ mgre_walk_ctx_t ctx = {
+ .t = t,
+ .ne = ne
+ };
+ nh = nhrp_entry_get_peer (ne);
+ adj_nbr_walk_nh (nhrp_entry_get_sw_if_index (ne),
+ (ip46_address_is_ip4 (nh) ?
+ FIB_PROTOCOL_IP4 :
+ FIB_PROTOCOL_IP6), nh, mgre_mk_complete_walk, &ctx);
}
static void
gre_nhrp_entry_deleted (const nhrp_entry_t * ne)
{
gre_main_t *gm = &gre_main;
+ const ip46_address_t *nh;
gre_tunnel_key_t key;
gre_tunnel_t *t;
u32 sw_if_index;
@@ -247,8 +270,17 @@ gre_nhrp_entry_deleted (const nhrp_entry_t * ne)
t = pool_elt_at_index (gm->tunnels, t_idx);
+ /* remove the next-hop as an ingress lookup key */
gre_nhrp_mk_key (t, ne, &key);
gre_tunnel_db_remove (t, &key);
+
+ nh = nhrp_entry_get_peer (ne);
+
+ /* make all the adjacencies incomplete */
+ adj_nbr_walk_nh (nhrp_entry_get_sw_if_index (ne),
+ (ip46_address_is_ip4 (nh) ?
+ FIB_PROTOCOL_IP4 :
+ FIB_PROTOCOL_IP6), nh, mgre_mk_incomplete_walk, t);
}
static walk_rc_t