Added ND proxy support to ws border router

Change-Id: I9439c1bee730908c786377950999a77146559b59

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bbr_api.c

@@ -32,6 +32,7 @@
 #include "Common_Protocols/icmpv6.h"
 #include "Common_Protocols/icmpv6_radv.h"
 #include "net_rpl.h"
+#include "Service_Libs/nd_proxy/nd_proxy.h"
 
 #include "6LoWPAN/ws/ws_bbr_api_internal.h"
 
@@ -87,6 +88,37 @@ static void ws_bbr_rpl_root_activate(uint8_t *dodag_prefix, uint8_t *dodag_id)
     rpl_control_update_dodag_route(protocol_6lowpan_rpl_root_dodag, NULL, 0, 0, 0xffffffff, false);
 }
 
+static int ws_border_router_proxy_validate(int8_t interface_id, uint8_t *address)
+{
+
+    /* Could also check route type, but I don't think it really matters */
+    ipv6_route_t *route;
+    route = ipv6_route_choose_next_hop(address, interface_id, NULL);
+    if (!route || route->prefix_len < 128) {
+        return -1;
+    }
+
+    return 0;
+}
+
+int ws_border_router_proxy_state_update(int8_t caller_interface_id, int8_t handler_interface_id, bool status)
+{
+    (void)caller_interface_id;
+
+    protocol_interface_info_entry_t *cur = protocol_stack_interface_info_get_by_id(handler_interface_id);
+    if (!cur) {
+        tr_error("No Interface");
+        return -1;
+    }
+
+    if (status) {
+        tr_debug("Border router Backhaul link ready");
+    } else {
+        tr_debug("Border router Backhaul link down");
+    }
+    return 0;
+}
+
 static void ws_bbr_root_start(protocol_interface_info_entry_t *cur)
 {
     uint8_t *bbr_prefix_ptr = NULL;
@@ -110,6 +142,8 @@ static void ws_bbr_root_start(protocol_interface_info_entry_t *cur)
        return;
    }
    ws_bbr_rpl_root_activate(bbr_prefix_ptr, bbr_dodag_id_ptr);
+
+   nd_proxy_downstream_interface_register(cur->id, ws_border_router_proxy_validate, ws_border_router_proxy_state_update);
 }
 
 void ws_bbr_seconds_timer(protocol_interface_info_entry_t *cur, uint32_t seconds)

source/6LoWPAN/ws/ws_bootstrap.c

@@ -53,6 +53,7 @@
 #include "6LoWPAN/lowpan_adaptation_interface.h"
 #include "Service_Libs/etx/etx.h"
 #include "Service_Libs/mac_neighbor_table/mac_neighbor_table.h"
+#include "Service_Libs/nd_proxy/nd_proxy.h"
 #include "platform/topo_trace.h"
 
 #include "net_rpl.h"
@@ -305,6 +306,7 @@ static int8_t ws_bootstrap_down(protocol_interface_info_entry_t *cur)
     // Reset WS information
     // ws_common_reset(cur)
     ws_llc_reset(cur);
+    nd_proxy_downstream_interface_unregister(cur->id);
 
     return nwk_6lowpan_down(cur);
 }