6RD: Rewritten 6RD RFC5969 support.

Change-Id: Ic30fbcb2630f39e45345d7215babf5d7ed4b33a0
Signed-off-by: Ole Troan <ot@cisco.com>

9 files changed, 17 insertions, 9 deletions

diff --git a/src/vnet/adj/adj_delegate.h b/src/vnet/adj/adj_delegate.h
index c47380012f1..13bf911c5a6 100644
--- a/src/vnet/adj/adj_delegate.h
+++ b/src/vnet/adj/adj_delegate.h
@@ -99,7 +99,6 @@ extern int adj_delegate_add(ip_adjacency_t *adj,
                             adj_delegate_type_t fdt,
                             index_t adi);
 
-
 /**
  * @brief Get a delegate from an adjacency
  *
diff --git a/src/vnet/adj/adj_glean.c b/src/vnet/adj/adj_glean.c
index 82d0a46eb1f..7de8e397737 100644
--- a/src/vnet/adj/adj_glean.c
+++ b/src/vnet/adj/adj_glean.c
@@ -48,6 +48,7 @@ adj_get_glean_node (fib_protocol_t proto)
  */
 adj_index_t
 adj_glean_add_or_lock (fib_protocol_t proto,
+                       vnet_link_t linkt,
 		       u32 sw_if_index,
 		       const ip46_address_t *nh_addr)
 {
@@ -61,15 +62,23 @@ adj_glean_add_or_lock (fib_protocol_t proto,
 
 	adj->lookup_next_index = IP_LOOKUP_NEXT_GLEAN;
 	adj->ia_nh_proto = proto;
+        adj->ia_link = linkt;
 	adj_gleans[proto][sw_if_index] = adj_get_index(adj);
 
 	if (NULL != nh_addr)
 	{
 	    adj->sub_type.glean.receive_addr = *nh_addr;
 	}
+        else
+        {
+            adj->sub_type.glean.receive_addr = zero_addr;
+        }
 
 	adj->rewrite_header.sw_if_index = sw_if_index;
 	adj->rewrite_header.data_bytes = 0;
+        adj->rewrite_header.max_l3_packet_bytes =
+            vnet_sw_interface_get_mtu(vnet_get_main(), sw_if_index, VLIB_TX);
+
         adj_lock(adj_get_index(adj));
 
 	vnet_update_adjacency_for_sw_interface(vnet_get_main(),
diff --git a/src/vnet/adj/adj_glean.h b/src/vnet/adj/adj_glean.h
index 47cddfbed2b..3ffbe36b51c 100644
--- a/src/vnet/adj/adj_glean.h
+++ b/src/vnet/adj/adj_glean.h
@@ -44,6 +44,7 @@
  *  as the source address in packets when the ARP/ND packet is sent
  */
 extern adj_index_t adj_glean_add_or_lock(fib_protocol_t proto,
+                                         vnet_link_t linkt,
 					 u32 sw_if_index,
 					 const ip46_address_t *nh_addr);
 
diff --git a/src/vnet/adj/rewrite.c b/src/vnet/adj/rewrite.c
index c21495a9644..f4b26a9d0dd 100644
--- a/src/vnet/adj/rewrite.c
+++ b/src/vnet/adj/rewrite.c
@@ -82,6 +82,8 @@ format_vnet_rewrite (u8 * s, va_list * args)
 	s = format (s, "DELETED:%d", rw->sw_if_index);
     }
 
+  s = format (s, " mtu:%d", rw->max_l3_packet_bytes);
+
   /* Format rewrite string. */
   if (rw->data_bytes > 0)
     s = format (s, " %U",
diff --git a/src/vnet/fib/fib_entry.h b/src/vnet/fib/fib_entry.h
index 273a5e66b15..d905a839c48 100644
--- a/src/vnet/fib/fib_entry.h
+++ b/src/vnet/fib/fib_entry.h
@@ -81,10 +81,6 @@ typedef enum fib_source_t_ {
      */
     FIB_SOURCE_MAP,
     /**
-     * SIXRD
-     */
-    FIB_SOURCE_SIXRD,
-    /**
      * DHCP
      */
     FIB_SOURCE_DHCP,
@@ -151,7 +147,6 @@ STATIC_ASSERT (sizeof(fib_source_t) == 1,
     [FIB_SOURCE_ADJ] = "adjacency",			\
     [FIB_SOURCE_MAP] = "MAP",			        \
     [FIB_SOURCE_SR] = "SR",			        \
-    [FIB_SOURCE_SIXRD] = "SixRD",			\
     [FIB_SOURCE_LISP] = "LISP", 			\
     [FIB_SOURCE_CLASSIFY] = "classify",			\
     [FIB_SOURCE_DHCP] = "DHCP",   			\
diff --git a/src/vnet/fib/fib_entry_src_special.c b/src/vnet/fib/fib_entry_src_special.c
index a2493bb5be9..a2899161c8f 100644
--- a/src/vnet/fib/fib_entry_src_special.c
+++ b/src/vnet/fib/fib_entry_src_special.c
@@ -64,7 +64,6 @@ fib_entry_src_special_register (void)
 {
     fib_entry_src_register(FIB_SOURCE_SPECIAL, &special_src_vft);
     fib_entry_src_register(FIB_SOURCE_MAP, &special_src_vft);
-    fib_entry_src_register(FIB_SOURCE_SIXRD, &special_src_vft);
     fib_entry_src_register(FIB_SOURCE_CLASSIFY, &special_src_vft);
     fib_entry_src_register(FIB_SOURCE_AE, &special_src_vft);
     fib_entry_src_register(FIB_SOURCE_PROXY, &special_src_vft);
diff --git a/src/vnet/fib/fib_path.c b/src/vnet/fib/fib_path.c
index ffb7ad228f1..b4f9971f52e 100644
--- a/src/vnet/fib/fib_path.c
+++ b/src/vnet/fib/fib_path.c
@@ -707,6 +707,7 @@ fib_path_attached_get_adj (fib_path_t *path,
     else
     {
         return (adj_glean_add_or_lock(dpo_proto_to_fib(path->fp_nh_proto),
+                                      link,
                                       path->attached.fp_interface,
                                       NULL));
     }
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index b9875d72b8e..6b7eb9c0f30 100644
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -1923,7 +1923,8 @@ ip4_probe_neighbor (vlib_main_t * vm, ip4_address_t * dst, u32 sw_if_index)
   if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
     {
       adj_unlock (ai);
-      ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP4, sw_if_index, &nh);
+      ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP4,
+				  VNET_LINK_IP4, sw_if_index, &nh);
       adj = adj_get (ai);
     }
 
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 4fd7129e408..30b717f5545 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -1744,7 +1744,8 @@ ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index)
   if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
     {
       adj_unlock (ai);
-      ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6, sw_if_index, &nh);
+      ai = adj_glean_add_or_lock (FIB_PROTOCOL_IP6,
+				  VNET_LINK_IP6, sw_if_index, &nh);
       adj = adj_get (ai);
     }