Support SLAAC addressing method for Wi-SUN Border router

This prevents the usage of DHCP in the Wi-SUN network and devices generates the address using SLAAC.
artokin · Oct 1, 2020 · 76fc9d7 · 76fc9d7
1 parent 71c8bde
commit 76fc9d7
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Showing 2 changed files with 13 additions and 3 deletions.
diff --git a/nanostack/ws_bbr_api.h b/nanostack/ws_bbr_api.h
@@ -97,6 +97,7 @@ int ws_bbr_start(int8_t interface_id, int8_t backbone_interface_id);
 #define BBR_BB_WAIT               0x0004 /**< Wait backbone availability before starting Wi-SUN network */
 #define BBR_DEFAULT_ROUTE         0x0008 /**< Add default route parameter to DIO */
 #define BBR_REQUIRE_DAO_REFRESH   0x0010 /**< Do not increment PAN version number when active forces DAO update from nodes*/
+#define BBR_GUA_SLAAC             0x0020 /**< in Global prefix use SLAAC address generation to reduce traffic during bootstrap */
 
 /**
  * Configure border router features.

diff --git a/source/6LoWPAN/ws/ws_bbr_api.c b/source/6LoWPAN/ws/ws_bbr_api.c
@@ -492,6 +492,8 @@ static void ws_bbr_rpl_status_check(protocol_interface_info_entry_t *cur)
 
     uint8_t local_prefix[8] = {0};
     uint8_t global_prefix[8] = {0};
+    uint8_t prefix_flags = 0;
+    uint32_t prefix_lifetime = 0;
 
     //tr_info("BBR status check");
 
@@ -596,7 +598,6 @@ static void ws_bbr_rpl_status_check(protocol_interface_info_entry_t *cur)
         }
         // TODO add global prefix
         if (memcmp(global_prefix, ADDR_UNSPECIFIED, 8) != 0) {
-
             tr_info("RPL global prefix activate %s", trace_ipv6_prefix(global_prefix, 64));
             // Add default route to RPL
             // Enable default routing to backbone
@@ -606,8 +607,12 @@ static void ws_bbr_rpl_status_check(protocol_interface_info_entry_t *cur)
                     return;
                 }
             }
+            if (configuration & BBR_GUA_SLAAC) {
+                prefix_flags |= PIO_A;
+                prefix_lifetime = WS_ULA_LIFETIME;
+            }
             ws_bbr_dhcp_server_start(cur, global_prefix, cur->ws_info->cfg->bbr.dhcp_address_lifetime);
-            rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, global_prefix, 64, 0, 0, 0, false);
+            rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, global_prefix, 64, prefix_flags, prefix_lifetime, prefix_lifetime, false);
             // no check for failure should have
 
             if (configuration & BBR_GUA_ROUTE) {
@@ -626,7 +631,11 @@ static void ws_bbr_rpl_status_check(protocol_interface_info_entry_t *cur)
          *  There is no status checks on prefix adds so this makes sure they are not lost
          *  DHCP validation should be done also
          */
-        rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, current_global_prefix, 64, 0, 0, 0, false);
+        if (configuration & BBR_GUA_SLAAC) {
+            prefix_flags |= PIO_A;
+            prefix_lifetime = WS_ULA_LIFETIME;
+        }
+        rpl_control_update_dodag_prefix(protocol_6lowpan_rpl_root_dodag, current_global_prefix, 64, prefix_flags, prefix_lifetime, prefix_lifetime, false);
 
         if (configuration & BBR_GUA_ROUTE) {
             // Add also global prefix and route to RPL