1 files changed, 27 insertions, 0 deletions

diff --git a/net/tipc/node.c b/net/tipc/node.c
index db46e5d1d156..06f642abdf38 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -334,6 +334,33 @@ bool tipc_node_is_up(struct tipc_node *n)
         return n->active_links[0];
 }
 
+void tipc_node_check_dest(struct tipc_node *n, struct tipc_bearer *b,
+                          bool *link_up, bool *addr_match,
+                          struct tipc_media_addr *maddr)
+{
+        struct tipc_link *l = n->links[b->identity].link;
+        struct tipc_media_addr *curr = &n->links[b->identity].maddr;
+
+        *link_up = l && tipc_link_is_up(l);
+        *addr_match = l && !memcmp(curr, maddr, sizeof(*maddr));
+}
+
+bool tipc_node_update_dest(struct tipc_node *n,  struct tipc_bearer *b,
+                           struct tipc_media_addr *maddr)
+{
+        struct tipc_link *l = n->links[b->identity].link;
+        struct tipc_media_addr *curr = &n->links[b->identity].maddr;
+
+        if (!l)
+                l = tipc_link_create(n, b, maddr);
+        if (!l)
+                return false;
+        memcpy(&l->media_addr, maddr, sizeof(*maddr));
+        memcpy(curr, maddr, sizeof(*maddr));
+        tipc_link_reset(l);
+        return true;
+}
+
 void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
 {
         n_ptr->links[l_ptr->bearer_id].link = l_ptr;