From: Neale Ranns <neale.ranns@cisco.com>
Date: Mon, 26 Oct 2020 10:44:54 +0000 (+0000)
Subject: fib: API to extract any resolving interface rather than the one from the
X-Git-Tag: v21.06-rc0~267
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=cc4f7e1bd75e383e6e9d065c4556118efbc4dcec;p=vpp.git

fib: API to extract any resolving interface rather than the one from the
best source

Type: improvement

Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Change-Id: Iaa91cbc7eba94f4ffbdc249ecdb49770bd2ae916
---

diff --git a/src/vnet/arp/arp.c b/src/vnet/arp/arp.c
index 6a32229adda..8b57376522d 100644
--- a/src/vnet/arp/arp.c
+++ b/src/vnet/arp/arp.c
@@ -543,7 +543,7 @@ arp_reply (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
 	  dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
 					  &arp0->ip4_over_ethernet[1].ip4,
 					  32);
-	  conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei);
+	  conn_sw_if_index0 = fib_entry_get_any_resolving_interface (dst_fei);
 
 	  switch (arp_dst_fib_check (dst_fei, &dst_flags))
 	    {
diff --git a/src/vnet/fib/fib_entry.c b/src/vnet/fib/fib_entry.c
index a8dec1a8c20..33c29a6e33c 100644
--- a/src/vnet/fib/fib_entry.c
+++ b/src/vnet/fib/fib_entry.c
@@ -1464,6 +1464,27 @@ fib_entry_get_resolving_interface (fib_node_index_t entry_index)
     return (fib_path_list_get_resolving_interface(fib_entry->fe_parent));
 }
 
+u32
+fib_entry_get_any_resolving_interface (fib_node_index_t entry_index)
+{
+    const fib_entry_src_t *src;
+    fib_entry_t *fib_entry;
+    fib_source_t source;
+    u32 sw_if_index;
+
+    fib_entry = fib_entry_get(entry_index);
+
+    FOR_EACH_SRC_ADDED(fib_entry, src, source,
+    ({
+        sw_if_index = fib_entry_get_resolving_interface_for_source (entry_index,
+                                                                    source);
+
+        if (~0 != sw_if_index)
+            break;
+    }));
+    return (sw_if_index);
+}
+
 fib_source_t
 fib_entry_get_best_source (fib_node_index_t entry_index)
 {
diff --git a/src/vnet/fib/fib_entry.h b/src/vnet/fib/fib_entry.h
index b97c80fd8bf..4053ff65181 100644
--- a/src/vnet/fib/fib_entry.h
+++ b/src/vnet/fib/fib_entry.h
@@ -440,6 +440,7 @@ extern u32 fib_entry_child_add(fib_node_index_t fib_entry_index,
 extern void fib_entry_child_remove(fib_node_index_t fib_entry_index,
 				   u32 sibling_index);
 extern u32 fib_entry_get_resolving_interface(fib_node_index_t fib_entry_index);
+extern u32 fib_entry_get_any_resolving_interface(fib_node_index_t fib_entry_index);
 extern u32 fib_entry_get_resolving_interface_for_source(
     fib_node_index_t fib_entry_index,
     fib_source_t source);