Wi-sun DHCP client support and RPL prefix learn Callback

Wi-sun enable dhcpv6 client and DHCPv6 support

RPL will indicate when user for learned prefix's or switch Parent

Author: Juha Heiskanen

source/6LoWPAN/Bootstraps/Generic/protocol_6lowpan_bootstrap.c

@@ -1786,7 +1786,7 @@ int8_t arm_6lowpan_bootstarp_bootstrap_set(int8_t interface_id, net_6lowpan_mode
          */
         if (cur->lowpan_info & INTERFACE_NWK_ROUTER_DEVICE) {
             //rpl_control_set_domain_on_interface(cur, protocol_6lowpan_rpl_domain, true);
-            //rpl_control_set_callback(protocol_6lowpan_rpl_domain, protocol_6lowpan_bootstrap_rpl_callback, cur);
+            //rpl_control_set_callback(protocol_6lowpan_rpl_domain, protocol_6lowpan_bootstrap_rpl_callback, NULL, cur);
         }
 #endif
         cur->configure_flags |= INTERFACE_BOOTSTRAP_DEFINED;
@@ -2181,7 +2181,7 @@ void nwk_6lowpan_nd_address_registartion_ready(protocol_interface_info_entry_t *
             // arm_nwk_6lowpan_rpl_dodag_poison from a previous connection may have left force_leaf set
             rpl_control_force_leaf(protocol_6lowpan_rpl_domain, false);
             rpl_control_set_domain_on_interface(cur, protocol_6lowpan_rpl_domain, true);
-            rpl_control_set_callback(protocol_6lowpan_rpl_domain, protocol_6lowpan_bootstrap_rpl_callback, cur);
+            rpl_control_set_callback(protocol_6lowpan_rpl_domain, protocol_6lowpan_bootstrap_rpl_callback, NULL, cur);
         }
         // Send unicast DIS to coordinator
         nwk_bootstrap_icmp_rpl_dis_coord_msg_tx(cur);

source/6LoWPAN/ws/ws_bootstrap.c

@@ -29,6 +29,7 @@
 #include "NWK_INTERFACE/Include/protocol.h"
 #include "6LoWPAN/Bootstraps/protocol_6lowpan.h"
 #include "6LoWPAN/Bootstraps/protocol_6lowpan_interface.h"
+#include "ipv6_stack/protocol_ipv6.h"
 #include "6LoWPAN/MAC/mac_helper.h"
 #include "6LoWPAN/MAC/mac_data_poll.h"
 #include "6LoWPAN/MAC/mpx_api.h"
@@ -57,7 +58,7 @@
 #include "Service_Libs/mac_neighbor_table/mac_neighbor_table.h"
 #include "Service_Libs/nd_proxy/nd_proxy.h"
 #include "platform/topo_trace.h"
-
+#include "DHCPv6_client/dhcpv6_client_api.h"
 #include "net_rpl.h"
 #include "mac_api.h"
 
@@ -127,7 +128,7 @@ static void ws_bootstrap_address_notification_cb(struct protocol_interface_info_
     }
     if (reason == ADDR_CALLBACK_DAD_COMPLETE) {
 		//Trig Address Registartion only when Bootstrap is ready
-        if (interface->nwk_bootstrap_state == ER_BOOTSRAP_DONE) {
+        if (interface->nwk_bootstrap_state == ER_BOOTSRAP_DONE || addr->source == ADDR_SOURCE_DHCP) {
             ws_bootsrap_event_trig(WS_ADDRESS_ADDED, interface->bootStrapId, ARM_LIB_LOW_PRIORITY_EVENT, (void *)addr);
         }
         if (addr_ipv6_scope(addr->address,interface) > IPV6_SCOPE_LINK_LOCAL) {
@@ -604,6 +605,7 @@ static int8_t ws_bootstrap_up(protocol_interface_info_entry_t *cur)
     cur->ipv6_neighbour_cache.omit_aro_success = true;
     /* Disable NUD Probes */
     cur->ipv6_neighbour_cache.send_nud_probes = false;
+    dhcp_client_init(cur->id);
 
     ws_nud_table_reset(cur);
 
@@ -627,6 +629,7 @@ static int8_t ws_bootstrap_down(protocol_interface_info_entry_t *cur)
     ws_llc_reset(cur);
     nd_proxy_downstream_interface_unregister(cur->id);
     ws_nud_table_reset(cur);
+    dhcp_client_delete(cur->id);
 
     return nwk_6lowpan_down(cur);
 }
@@ -1509,6 +1512,51 @@ static void ws_bootstrap_rpl_callback(rpl_event_t event, void *handle)
     tr_info("RPL event %d", event);
 }
 
+static void ws_dhcp_client_global_adress_cb(int8_t interface, uint8_t dhcp_addr[static 16], uint8_t prefix[static 16], bool register_status)
+{
+    (void)prefix;
+    (void)interface;
+    //TODO add handler for negative status
+    tr_debug("DHCPv6 %s status %u",trace_ipv6(dhcp_addr), register_status);
+}
+
+static bool ws_address_entry_available(uint8_t *prefixPtr, if_address_list_t *list)
+{
+    bool addressReady = false;
+    ns_list_foreach(if_address_entry_t, entry, list) {
+        if (memcmp(entry->address, prefixPtr, 8) == 0) {
+            addressReady = true;
+            break;
+        }
+    }
+    return addressReady;
+}
+
+void ws_dhcp_client_address_request(protocol_interface_info_entry_t *cur, uint8_t *prefix, uint8_t *parent_link_local)
+{
+    if (!ws_address_entry_available(prefix, &cur->ip_addresses)) {
+        if (dhcp_client_get_global_address(cur->id, parent_link_local, prefix, cur->mac, ws_dhcp_client_global_adress_cb) != 0) {
+            tr_error("DHCPp client request fail");
+        }
+    }
+}
+
+static void ws_rpl_prefix_callback(prefix_entry_t *prefix, void *handle, uint8_t *parent_link_local)
+{
+    protocol_interface_info_entry_t *cur = (protocol_interface_info_entry_t*) handle;
+    /* Check if A-Flag.
+     * A RPL node may use this option for the purpose of Stateless Address Autoconfiguration (SLAAC)
+     * from a prefix advertised by a parent.
+     */
+    if (prefix->options & PIO_A) {
+        if (icmpv6_slaac_prefix_update(cur, prefix->prefix, prefix->prefix_len, prefix->lifetime, prefix->preftime) != 0) {
+            ipv6_interface_slaac_handler(cur, prefix->prefix, prefix->prefix_len, prefix->lifetime, prefix->preftime);
+        }
+    } else if (prefix->prefix_len) {
+        ws_dhcp_client_address_request(cur, prefix->prefix, parent_link_local);
+    }
+}
+
 static void ws_bootstrap_rpl_activate(protocol_interface_info_entry_t *cur)
 {
     tr_debug("RPL Activate");
@@ -1517,7 +1565,7 @@ static void ws_bootstrap_rpl_activate(protocol_interface_info_entry_t *cur)
 
     addr_add_router_groups(cur);
     rpl_control_set_domain_on_interface(cur, protocol_6lowpan_rpl_domain, downstream);
-    rpl_control_set_callback(protocol_6lowpan_rpl_domain, ws_bootstrap_rpl_callback, cur);
+    rpl_control_set_callback(protocol_6lowpan_rpl_domain, ws_bootstrap_rpl_callback, ws_rpl_prefix_callback, cur);
     // If i am router I Do this
     rpl_control_force_leaf(protocol_6lowpan_rpl_domain, leaf);
 

source/6LoWPAN/ws/ws_bootstrap.h

@@ -62,6 +62,8 @@ void ws_nud_entry_remove_active(protocol_interface_info_entry_t *cur, void *neig
 
 void ws_nud_active_timer(protocol_interface_info_entry_t *cur, uint16_t ticks);
 
+void ws_dhcp_client_address_request(protocol_interface_info_entry_t *cur, uint8_t *prefix, uint8_t *parent_link_local);
+
 #else
 
 #define ws_bootstrap_init(interface_id, bootstrap_mode) (-1)

source/RPL/rpl_control.c

@@ -348,9 +348,10 @@ void rpl_control_remove_domain_from_interface(protocol_interface_info_entry_t *c
     }
 }
 
-void rpl_control_set_callback(rpl_domain_t *domain, rpl_domain_callback_t callback, void *cb_handle)
+void rpl_control_set_callback(rpl_domain_t *domain, rpl_domain_callback_t callback, rpl_prefix_callback_t prefix_learn_cb, void *cb_handle)
 {
     domain->callback = callback;
+    domain->prefix_cb = prefix_learn_cb;
     domain->cb_handle = cb_handle;
 }
 
@@ -686,6 +687,12 @@ static void rpl_control_process_prefix_options(protocol_interface_info_entry_t *
             prefix_entry_t *prefix_entry = rpl_dodag_update_dio_prefix(dodag, prefix, prefix_len, flags, valid, preferred, false, true);
             if (prefix_entry && pref_parent) {
                 rpl_control_process_prefix_option(prefix_entry, cur);
+                rpl_domain_t *domain = cur->rpl_domain;
+                if (domain && domain->prefix_cb) {
+                    uint8_t ll_address[16];
+                    memcpy(ll_address, rpl_neighbour_ll_address(pref_parent), 16);
+                    domain->prefix_cb(prefix_entry, domain->cb_handle,ll_address);
+                }
             }
         }
 
@@ -711,15 +718,7 @@ void rpl_control_process_prefix_option(prefix_entry_t *prefix, protocol_interfac
         //tr_debug("Register On Link Prefix to routing table");
         ipv6_route_add(prefix->prefix, prefix->prefix_len, cur->id, NULL, ROUTE_RADV, prefix->lifetime, 0);
     }
-    /* Check if A-Flag.
-     * A RPL node may use this option for the purpose of Stateless Address Autoconfiguration (SLAAC)
-     * from a prefix advertised by a parent.
-     */
-    if (prefix->options & PIO_A) {
-        if (icmpv6_slaac_prefix_update(cur, prefix->prefix, prefix->prefix_len, prefix->lifetime, prefix->preftime) != 0) {
-            ipv6_interface_slaac_handler(cur, prefix->prefix, prefix->prefix_len, prefix->lifetime, prefix->preftime);
-        }
-    }
+
 }
 
 

source/RPL/rpl_control.h

@@ -40,6 +40,8 @@ typedef enum rpl_event {
 
 typedef void rpl_domain_callback_t(rpl_event_t event, void *handle);
 
+typedef void rpl_prefix_callback_t(struct prefix_entry_t *prefix, void *handle, uint8_t *parent_link_local);
+
 typedef struct rpl_domain
 {
     NS_LIST_HEAD_INCOMPLETE(struct rpl_instance) instances;
@@ -52,6 +54,7 @@ typedef struct rpl_domain
     /* As part of shutdown, we can force entering leaf mode */
     bool force_leaf;
     rpl_domain_callback_t *callback;
+    rpl_prefix_callback_t *prefix_cb;
     void *cb_handle;
 } rpl_domain_t;
 
@@ -141,7 +144,7 @@ rpl_domain_t *rpl_control_create_domain(void);
 void rpl_control_delete_domain(rpl_domain_t *domain);
 void rpl_control_set_domain_on_interface(struct protocol_interface_info_entry *cur, rpl_domain_t *domain, bool downstream);
 void rpl_control_remove_domain_from_interface(struct protocol_interface_info_entry *cur);
-void rpl_control_set_callback(rpl_domain_t *domain, rpl_domain_callback_t callback, void *cb_handle);
+void rpl_control_set_callback(rpl_domain_t *domain, rpl_domain_callback_t callback, rpl_prefix_callback_t prefix_learn_cb,  void *cb_handle);
 
 /* Target publishing */
 void rpl_control_publish_host_address(rpl_domain_t *domain, const uint8_t addr[16], uint32_t lifetime);

source/RPL/rpl_upward.c

@@ -1407,6 +1407,9 @@ void rpl_instance_run_parent_selection(rpl_instance_t *instance)
             if (rpl_interface) {
                 ns_list_foreach(prefix_entry_t, prefix, &dodag->prefixes) {
                     rpl_control_process_prefix_option(prefix, rpl_interface);
+                    if (instance->domain->prefix_cb) {
+                        instance->domain->prefix_cb(prefix, rpl_interface, preferred_parent->ll_address);
+                    }
                 }
             }
         }

source/nsconfig.h

@@ -57,6 +57,12 @@
 #endif
 #endif /* HAVE_THREAD */
 
+#if defined(HAVE_WS)
+#ifndef HAVE_DHCPV6
+#define HAVE_DHCPV6
+#endif
+#endif /* HAVE_WS */
+
 
 #endif // ifndef _NANOSTACK_SOURCE_CONFIG_H
 

test/nanostack/unittest/stub/rpl_control_stub.c

@@ -99,7 +99,7 @@ void rpl_control_remove_domain_from_interface(protocol_interface_info_entry_t *c
 
 }
 
-void rpl_control_set_callback(rpl_domain_t *domain, rpl_domain_callback_t callback, void *cb_handle)
+void rpl_control_set_callback(rpl_domain_t *domain, rpl_domain_callback_t callback, rpl_prefix_callback_t prefix_learn_cb, void *cb_handle)
 {
 
 }