tipc: Strengthen checks for neighboring node discovery
Enhances existing checks on the discovery domain associated with a TIPC
bearer. A bearer can no longer be configured to accept links from itself
only (which would be pointless), or to nodes outside its own cluster
(since multi-cluster support has now been removed from TIPC). Also, the
neighbor discovery routine now validates link setup requests against the
configured discovery domain for the bearer, rather than simply ensuring
the requesting node belongs to the node's own cluster.
Signed-off-by: Allan Stephens <Allan.Stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 491eff5..d2163bd 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -52,6 +52,7 @@
* struct link_req - information about an ongoing link setup request
* @bearer: bearer issuing requests
* @dest: destination address for request messages
+ * @domain: network domain to which links can be established
* @buf: request message to be (repeatedly) sent
* @timer: timer governing period between requests
* @timer_intv: current interval between requests (in ms)
@@ -59,6 +60,7 @@
struct link_req {
struct tipc_bearer *bearer;
struct tipc_media_addr dest;
+ u32 domain;
struct sk_buff *buf;
struct timer_list timer;
unsigned int timer_intv;
@@ -147,7 +149,7 @@
}
if (!tipc_in_scope(dest, tipc_own_addr))
return;
- if (!in_own_cluster(orig))
+ if (!tipc_in_scope(b_ptr->link_req->domain, orig))
return;
/* Locate structure corresponding to requesting node */
@@ -287,7 +289,7 @@
* tipc_disc_init_link_req - start sending periodic link setup requests
* @b_ptr: ptr to bearer issuing requests
* @dest: destination address for request messages
- * @dest_domain: network domain of node(s) which should respond to message
+ * @dest_domain: network domain to which links can be established
*
* Returns pointer to link request structure, or NULL if unable to create.
*/
@@ -310,6 +312,7 @@
memcpy(&req->dest, dest, sizeof(*dest));
req->bearer = b_ptr;
+ req->domain = dest_domain;
req->timer_intv = TIPC_LINK_REQ_INIT;
k_init_timer(&req->timer, (Handler)disc_timeout, (unsigned long)req);
k_start_timer(&req->timer, req->timer_intv);