Wi-sun New key index activate.

Delayed default key index activate after first config message confirmation.

Change-Id: Ibcfbe82ad651f6ad4570180cade192406d566d8d

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -1465,8 +1465,13 @@ static void ws_bootstrap_asynch_ind(struct protocol_interface_info_entry *cur, c
 static void ws_bootstrap_asynch_confirm(struct protocol_interface_info_entry *interface, uint8_t asynch_message)
 {
     ws_stats_update(interface, STATS_WS_ASYNCH_TX, 1);
-    (void)interface;
-    (void)asynch_message;
+    if (interface->bootsrap_mode == ARM_NWK_BOOTSRAP_MODE_6LoWPAN_BORDER_ROUTER) {
+        if (asynch_message == WS_FT_PAN_CONF && interface->ws_info->pending_key_index_info.state == PENDING_KEY_INDEX_ACTIVATE) {
+            interface->ws_info->pending_key_index_info.state = NO_PENDING_PROCESS;
+            tr_info("Activate new default key %u", interface->ws_info->pending_key_index_info.index + 1);
+            mac_helper_security_auto_request_key_index_set(interface, interface->ws_info->pending_key_index_info.index, interface->ws_info->pending_key_index_info.index + 1);
+        }
+    }
 }
 
 uint32_t ws_time_from_last_unicast_traffic(uint32_t current_time_stamp, ws_neighbor_class_entry_t *ws_neighbor)
@@ -2410,7 +2415,16 @@ static void ws_bootstrap_nw_key_clear(protocol_interface_info_entry_t *cur, uint
 
 static void ws_bootstrap_nw_key_index_set(protocol_interface_info_entry_t *cur, uint8_t index)
 {
-    // Set send key
+
+    if (cur->bootsrap_mode == ARM_NWK_BOOTSRAP_MODE_6LoWPAN_BORDER_ROUTER) {
+        if (cur->mac_parameters->mac_default_key_index != 0 && cur->mac_parameters->mac_default_key_index  != index + 1) {
+            tr_info("New Pending key Request %u", index + 1);
+            cur->ws_info->pending_key_index_info.state = PENDING_KEY_INDEX_ADVERTISMENT;
+            cur->ws_info->pending_key_index_info.index = index;
+            return;
+        }
+    }
+
     mac_helper_security_auto_request_key_index_set(cur, index, index + 1);
 }
 
@@ -2660,7 +2674,13 @@ static void ws_bootstrap_pan_config(protocol_interface_info_entry_t *cur)
 
     async_req.security.SecurityLevel = mac_helper_default_security_level_get(cur);
     async_req.security.KeyIdMode = mac_helper_default_security_key_id_mode_get(cur);
-    async_req.security.KeyIndex = mac_helper_default_key_index_get(cur);
+    if (cur->bootsrap_mode == ARM_NWK_BOOTSRAP_MODE_6LoWPAN_BORDER_ROUTER && cur->ws_info->pending_key_index_info.state == PENDING_KEY_INDEX_ADVERTISMENT) {
+        async_req.security.KeyIndex =  cur->ws_info->pending_key_index_info.index + 1;
+        cur->ws_info->pending_key_index_info.state = PENDING_KEY_INDEX_ACTIVATE;
+    } else {
+        async_req.security.KeyIndex = mac_helper_default_key_index_get(cur);
+    }
+
     ws_llc_asynch_request(cur, &async_req);
 }
 
@@ -2680,6 +2700,11 @@ static void ws_bootstrap_event_handler(arm_event_s *event)
             break;
         case WS_DISCOVERY_START:
             tr_info("Discovery start");
+
+            //Clear Pending Key Index State
+            cur->ws_info->pending_key_index_info.state = NO_PENDING_PROCESS;
+            cur->mac_parameters->mac_default_key_index = 0;
+
             // All trickle timers stopped to allow entry from any state
             cur->ws_info->trickle_pa_running = false;
             cur->ws_info->trickle_pc_running = false;

source/6LoWPAN/ws/ws_common.c

@@ -316,6 +316,9 @@ int8_t ws_common_allocate_and_init(protocol_interface_info_entry_t *cur)
     cur->ws_info->fhss_bc_dwell_interval = WS_FHSS_BC_DWELL_INTERVAL;
     cur->ws_info->fhss_uc_channel_function = WS_DH1CF;
     cur->ws_info->fhss_bc_channel_function = WS_DH1CF;
+
+    cur->ws_info->pending_key_index_info.state = NO_PENDING_PROCESS;
+
     for (uint8_t n = 0; n < 8; n++) {
         cur->ws_info->fhss_channel_mask[n] = 0xffffffff;
     }

source/6LoWPAN/ws/ws_common.h

@@ -60,6 +60,15 @@ typedef struct ws_nud_table_entry {
     ns_list_link_t  link;
 } ws_nud_table_entry_t;
 
+#define NO_PENDING_PROCESS 0
+#define PENDING_KEY_INDEX_ADVERTISMENT 1
+#define PENDING_KEY_INDEX_ACTIVATE 2
+
+typedef struct {
+    unsigned state: 2;
+    uint8_t index;
+} ws_pending_key_index_t;
+
 typedef NS_LIST_HEAD(ws_nud_table_entry_t, link) ws_nud_table_list_t;
 
 typedef struct ws_info_s {
@@ -88,6 +97,7 @@ typedef struct ws_info_s {
     bool trickle_pcs_running: 1;
     bool trickle_pc_running: 1;
     bool fhss_owner: 1;
+    ws_pending_key_index_t pending_key_index_info;
     // default fhss parameters for this device
     uint8_t fhss_uc_dwell_interval;
     uint8_t fhss_bc_dwell_interval;

source/NWK_INTERFACE/protocol_core.c

@@ -603,6 +603,7 @@ static protocol_interface_info_entry_t *protocol_core_interface_6lowpan_entry_ge
     entry->mac_parameters->mac_prev_key_attribute_id = 0;
     entry->mac_parameters->mac_default_key_attribute_id = 1;
     entry->mac_parameters->mac_next_key_attribute_id = 2;
+    entry->mac_parameters->mac_default_key_index = 0;
 
     entry->beacon_cb = beacon_received;