tipc: move link creation from neighbor discoverer to node

As a step towards turning links into node internal entities, we move the
creation of links from the neighbor discovery logics to the node's link
control logics.

We also create an additional entry for the link's media address in the
newly introduced struct tipc_link_entry, since this is where it is
needed in the upcoming commits. The current copy in struct tipc_link
is kept for now, but will be removed later.

Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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;