Generic forwarding callback and EF state enabler for Wi-SUN BBR.

Author: Juha Heiskanen

source/6LoWPAN/adaptation_interface.c

@@ -1214,6 +1214,15 @@ static void lowpan_adaptation_priority_status_update(protocol_interface_info_ent
     }
 }
 
+void lowpan_adaptation_expedite_forward_enable(protocol_interface_info_entry_t *cur)
+{
+    fragmenter_interface_t *interface_ptr = lowpan_adaptation_interface_discover(cur->id);
+    if (!interface_ptr) {
+        return;
+    }
+    lowpan_adaptation_high_priority_state_enable(cur, interface_ptr);
+}
+
 void lowpan_adaptation_interface_slow_timer(protocol_interface_info_entry_t *cur)
 {
     fragmenter_interface_t *interface_ptr = lowpan_adaptation_interface_discover(cur->id);

source/6LoWPAN/lowpan_adaptation_interface.h

@@ -62,6 +62,8 @@ int8_t lowpan_adaptation_free_messages_from_queues_by_address(struct protocol_in
 
 int8_t lowpan_adaptation_indirect_queue_params_set(struct protocol_interface_info_entry *cur, uint16_t indirect_big_packet_threshold, uint16_t max_indirect_big_packets_total, uint16_t max_indirect_small_packets_per_child);
 
+void lowpan_adaptation_expedite_forward_enable(struct protocol_interface_info_entry *cur);
+
 void lowpan_adaptation_interface_slow_timer(struct protocol_interface_info_entry *cur);
 
 #endif /* LOWPAN_ADAPTATION_INTERFACE_H_ */

source/6LoWPAN/ws/ws_bbr_api.c

@@ -38,11 +38,13 @@
 #include "RPL/rpl_data.h"
 #include "Common_Protocols/icmpv6.h"
 #include "Common_Protocols/icmpv6_radv.h"
+#include "Common_Protocols/ip.h"
 #include "ws_management_api.h"
 #include "net_rpl.h"
 #include "Service_Libs/nd_proxy/nd_proxy.h"
 #include "6LoWPAN/ws/ws_bbr_api_internal.h"
 #include "6LoWPAN/ws/ws_pae_controller.h"
+#include "6LoWPAN/lowpan_adaptation_interface.h"
 #include "DHCPv6_Server/DHCPv6_server_service.h"
 #include "DHCPv6_client/dhcpv6_client_api.h"
 #include "libDHCPv6/libDHCPv6_vendordata.h"
@@ -907,6 +909,18 @@ bool ws_bbr_ready_to_start(protocol_interface_info_entry_t *cur)
     return true;
 }
 
+static void ws_bbr_forwarding_cb(protocol_interface_info_entry_t *interface, buffer_t *buf)
+{
+    uint8_t traffic_class = buf->options.traffic_class >> IP_TCLASS_DSCP_SHIFT;
+
+    if (traffic_class == IP_DSCP_EF) {
+        //indicate EF forwarding to adaptation
+        lowpan_adaptation_expedite_forward_enable(interface);
+    }
+}
+
+
+
 void ws_bbr_init(protocol_interface_info_entry_t *interface)
 {
     (void) interface;
@@ -919,6 +933,7 @@ void ws_bbr_init(protocol_interface_info_entry_t *interface)
         ws_bbr_fhss_bsi = ws_bbr_bsi_read(&bbr_info_nvm_tlv);
         tr_debug("Read BSI %u from NVM", ws_bbr_fhss_bsi);
     }
+    interface->if_common_forwarding_out_cb = &ws_bbr_forwarding_cb;
 }
 
 

source/6LoWPAN/ws/ws_bootstrap.c

@@ -1214,6 +1214,7 @@ static int8_t ws_bootstrap_down(protocol_interface_info_entry_t *cur)
     ws_pae_controller_stop(cur);
     ws_bootstrap_candidate_table_reset(cur);
     blacklist_clear();
+    cur->if_common_forwarding_out_cb = NULL;
 
     return nwk_6lowpan_down(cur);
 }

source/Common_Protocols/ipv6.c

@@ -1362,6 +1362,9 @@ buffer_t *ipv6_forwarding_up(buffer_t *buf)
         }
     } else { /* unicast */
         if (!for_us) {
+            if (cur->if_common_forwarding_out_cb) {
+                cur->if_common_forwarding_out_cb(cur, buf);
+            }
             return ipv6_consider_forwarding_unicast_packet(buf, cur, &ll_src);
         }
     }

source/NWK_INTERFACE/Include/protocol.h

@@ -474,6 +474,7 @@ struct protocol_interface_info_entry {
     int8_t (*if_down)(struct protocol_interface_info_entry *cur);
     int8_t (*if_up)(struct protocol_interface_info_entry *cur);
     void (*if_stack_buffer_handler)(buffer_t *);
+    void (*if_common_forwarding_out_cb)(struct protocol_interface_info_entry *, buffer_t *);
     bool (*if_ns_transmit)(struct protocol_interface_info_entry *cur, ipv6_neighbour_t *neighCacheEntry, bool unicast, uint8_t seq);
     bool (*if_map_ip_to_link_addr)(struct protocol_interface_info_entry *cur, const uint8_t *ip_addr, addrtype_t *ll_type, const uint8_t **ll_addr_out);
     bool (*if_map_link_addr_to_ip)(struct protocol_interface_info_entry *cur, addrtype_t ll_type, const uint8_t *ll_addr, uint8_t *ip_addr_out);

source/NWK_INTERFACE/protocol_core.c

@@ -462,6 +462,7 @@ static void protocol_core_base_init(protocol_interface_info_entry_t *entry, nwk_
     entry->ipv6_configure = NULL;
     entry->if_lowpan_security_params = NULL;
     entry->if_ns_transmit = NULL;
+    entry->if_common_forwarding_out_cb = NULL;
     entry->if_special_forwarding = NULL;
     entry->if_snoop = NULL;
     entry->if_icmp_handler = NULL;

test/nanostack/unittest/stub/adaptation_interface_stub.c

@@ -116,3 +116,8 @@ void lowpan_adaptation_interface_slow_timer(protocol_interface_info_entry_t *cur
 {
 
 }
+
+void lowpan_adaptation_expedite_forward_enable(struct protocol_interface_info_entry *cur)
+{
+
+}