Changed large network initial-key trickle parameters

Set imin 8 and and imax to 20, shortest and longest interval looks then following:

8        16               20
IIIIIIII IIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII    I = 8, total 44 minutes

20                   20                   20
IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIIIIIIII  I = 20, total 60 minutes

Author: Mika Leppänen

source/6LoWPAN/ws/ws_cfg_settings.c

@@ -456,9 +456,9 @@ static void ws_cfg_network_size_config_set_large(ws_cfg_nw_size_t *cfg)
         cfg->sec_prot.initial_key_imax = VERY_SLOW_NW_INITIAL_KEY_TRICKLE_IMAX_SECS;
         cfg->sec_prot.initial_key_retry_cnt = DEFAULT_INITIAL_KEY_RETRY_COUNT;
     } else {
-        cfg->sec_prot.initial_key_retry_delay = DEFAULT_INITIAL_KEY_RETRY_TIMER;
-        cfg->sec_prot.initial_key_imin = DEFAULT_INITIAL_KEY_TRICKLE_IMIN_SECS;
-        cfg->sec_prot.initial_key_imax = DEFAULT_INITIAL_KEY_TRICKLE_IMAX_SECS;
+        cfg->sec_prot.initial_key_retry_delay = NONE_INITIAL_KEY_RETRY_TIMER;
+        cfg->sec_prot.initial_key_imin = LARGE_NW_INITIAL_KEY_TRICKLE_IMIN_SECS;
+        cfg->sec_prot.initial_key_imax = LARGE_NW_INITIAL_KEY_TRICKLE_IMAX_SECS;
         cfg->sec_prot.initial_key_retry_cnt = DEFAULT_INITIAL_KEY_RETRY_COUNT;
     }
 }

source/6LoWPAN/ws/ws_config.h

@@ -235,6 +235,10 @@ extern uint8_t DEVICE_MIN_SENS;
 #define DEFAULT_INITIAL_KEY_TRICKLE_IMIN_SECS          360   /* 6 to 12 minutes */
 #define DEFAULT_INITIAL_KEY_TRICKLE_IMAX_SECS          720
 
+// Large network trickle values for sending of initial EAPOL-key
+#define LARGE_NW_INITIAL_KEY_TRICKLE_IMIN_SECS         480   /* 8 to 20 minutes */
+#define LARGE_NW_INITIAL_KEY_TRICKLE_IMAX_SECS         1200
+
 // Very slow network values for sending of initial EAPOL-key
 #define VERY_SLOW_NW_INITIAL_KEY_TRICKLE_IMIN_SECS     600   /* 10 to 60 minutes */
 #define VERY_SLOW_NW_INITIAL_KEY_TRICKLE_IMAX_SECS     3600

test/nanostack/unittest/6LoWPAN/ws_cfg_settings/test_ws_cfg_settings.c

@@ -245,9 +245,9 @@ static const ws_cfg_t ws_cfg_defaults_large = {
     .sec_prot.sec_prot_trickle_imax = 240,          // network size affects
     .sec_prot.sec_prot_trickle_timer_exp = 2,       // network size affects
     .sec_prot.sec_max_ongoing_authentication = 100, // network size affects
-    .sec_prot.initial_key_retry_delay = 120,        // network size affects
-    .sec_prot.initial_key_imin = 360,               // network size affects
-    .sec_prot.initial_key_imax = 720,               // network size affects
+    .sec_prot.initial_key_retry_delay = 0,          // network size affects
+    .sec_prot.initial_key_imin = 480,               // network size affects
+    .sec_prot.initial_key_imax = 1200,              // network size affects
     .sec_prot.initial_key_retry_cnt = 2             // network size affects
 };