Added trace for debugging DHCPv6 failure reason.

Change-Id: I926523eb724c22a3fb2d611ead8f5097f68fa978

Author: Juha Heiskanen

source/DHCPv6_Server/DHCPv6_Server_service.c

@@ -147,6 +147,11 @@ int DHCPV6_server_service_request_handler(uint16_t instance_id, uint32_t msg_tr_
                     replyPacket.T1 = dhcp_ia_non_temporal_params.T1;
                     replyPacket.iaId = dhcp_ia_non_temporal_params.iaId;
                     replyPacket.transaction_ID = msg_tr_id;
+
+                    uint16_t duid_length = libdhcpv6_duid_option_size(replyPacket.clientDUID.linkType);
+                    duid_length -= 8;
+                    tr_debug("Response dhcp sol %u clientDUID", trace_array(replyPacket.clientDUID.linkID, duid_length));
+
                     //Check First Current list
                     if (DHCPv6_server_respond_client(serverBase, &replyPacket, &dhcp_ia_non_temporal_params, &responseBuf, true) == 0) {
                         //Respond

source/DHCPv6_client/dhcpv6_client_service.c

@@ -451,6 +451,7 @@ void dhcpv6_renew(protocol_interface_info_entry_t *interface, if_address_entry_t
         // Default retry values are modified from specification update to message
         dhcp_service_set_retry_timers(srv_data_ptr->transActionId, dhcp_client.sol_timeout, dhcp_client.sol_max_rt, dhcp_client.sol_max_rc);
     }
+    tr_error("DHCP renew send OK");
 }
 
 static bool dhcpv6_client_set_address(int8_t interface_id, dhcpv6_client_server_data_t *srv_data_ptr)

source/libDHCPv6/dhcp_service_api.c

@@ -828,6 +828,8 @@ void dhcp_service_send_message(msg_tr_t *msg_tr_ptr)
     }
     if (retval != 0) {
         tr_warn("dhcp service socket_sendto fails: %i", retval);
+    } else {
+        tr_warn("dhcp service socket_sendto %s", msg_tr_ptr->addr.address);
     }
 }
 bool dhcp_service_timer_tick(uint16_t ticks)