Diff: mbed-client/mbed-client-classic/source/m2mconnectionhandlerpimpl.cpp

Revision:

0:f7c60d3e7b8a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-client/mbed-client-classic/source/m2mconnectionhandlerpimpl.cpp	Wed May 18 19:06:32 2016 +0000
@@ -0,0 +1,253 @@
+/*
+ * Copyright (c) 2015 ARM Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "mbed-client-classic/m2mconnectionhandlerpimpl.h"
+#include "mbed-client/m2mconnectionobserver.h"
+#include "mbed-client/m2mconstants.h"
+#include "mbed-client/m2msecurity.h"
+#include "mbed-client/m2mconnectionhandler.h"
+
+#include "Socket/TCPSocketConnection.h"
+#include "Socket/UDPSocket.h"
+#include "threadwrapper.h"
+#include "mbed_error.h"
+
+
+M2MConnectionHandlerPimpl::M2MConnectionHandlerPimpl(M2MConnectionHandler* base, M2MConnectionObserver &observer,
+                                                     M2MConnectionSecurity* sec,
+                                                     M2MInterface::BindingMode mode,
+                                                     M2MInterface::NetworkStack stack)
+:_base(base),
+ _observer(observer),
+ _security_impl(sec),
+ _use_secure_connection(false),
+ _binding_mode(mode),
+ _network_stack(stack),
+ _resolved(true),
+ _is_handshaking(false),
+ _listening(false),
+ _listen_thread(0),
+ _recv_thread(0),
+ _send_thread(0)
+{
+    memset(&_address_buffer, 0, sizeof _address_buffer);
+    memset(&_address, 0, sizeof _address);
+    _address._address = _address_buffer;
+
+    if (_network_stack != M2MInterface::LwIP_IPv4) {
+        error("ConnectionHandler: Unsupported network stack, only IPv4 is currently supported");
+    }
+    
+    if (_binding_mode == M2MInterface::TCP ||
+        _binding_mode == M2MInterface::TCP_QUEUE) {
+        error("ConnectionHandler: Unsupported binding mode, only UDP based modes are currently supported");
+    }
+    
+    _running = true;
+    _recv_thread = rtos::create_thread<
+        M2MConnectionHandlerPimpl,
+        &M2MConnectionHandlerPimpl::recv_handler>(this, osPriorityAboveNormal);
+    _send_thread = rtos::create_thread<
+        M2MConnectionHandlerPimpl,
+        &M2MConnectionHandlerPimpl::send_handler>(this);
+    _listen_thread = rtos::create_thread<
+        M2MConnectionHandlerPimpl,
+        &M2MConnectionHandlerPimpl::listen_handler>(this);    
+}
+
+M2MConnectionHandlerPimpl::~M2MConnectionHandlerPimpl()
+{
+    _listening = false;
+    _running = false;
+    
+    if (_listen_thread) {
+        delete _listen_thread;
+        _listen_thread = 0;
+    }
+    
+    if (_recv_thread) {
+        delete _recv_thread;
+        _recv_thread = 0;
+    }
+    
+    if (_send_thread) {
+        delete _send_thread;
+        _send_thread = 0;
+    }
+    
+    delete _security_impl;
+}
+
+bool M2MConnectionHandlerPimpl::bind_connection(const uint16_t listen_port)
+{
+    return !(_socket.bind(listen_port) < 0);
+}
+
+bool M2MConnectionHandlerPimpl::resolve_server_address(const String& server_address,
+                                                       const uint16_t server_port,
+                                                       M2MConnectionObserver::ServerType server_type,
+                                                       const M2MSecurity* security)
+{
+    if (_endpoint.set_address(server_address.c_str(), server_port) < 0) {
+        return false;
+    }
+
+    inet_aton(_endpoint.get_address(), _address._address);
+    _address._port = _endpoint.get_port();
+    _address._length = 4;
+    _address._stack = _network_stack;
+
+    if (security) {
+        if (security->resource_value_int(M2MSecurity::SecurityMode) == M2MSecurity::Certificate ||
+            security->resource_value_int(M2MSecurity::SecurityMode) == M2MSecurity::Psk) {
+            if (_security_impl != NULL) {
+                _security_impl->reset();
+                _security_impl->init(security);
+                
+                if (_security_impl->connect(_base) < 0) {
+                    return false;
+                }
+                
+                _use_secure_connection = true;
+            }
+        }
+    }
+    
+    _observer.address_ready(_address,
+                            server_type,
+                            _address._port);
+    
+    return true;
+}
+
+
+void M2MConnectionHandlerPimpl::recv_handler()
+{
+    while (_running) {
+        Endpoint recv_endpoint;
+        int size = _socket.receiveFrom(recv_endpoint,
+            (char*)_recv_buffer, sizeof _recv_buffer);
+    
+        if (size > 0) {
+            _recv_queue.put(new std::string(_recv_buffer, _recv_buffer+size));
+        } else {
+            rtos::Thread::wait(1000);
+        }
+    }
+}
+
+void M2MConnectionHandlerPimpl::send_handler()
+{    
+    while (_running) {
+        osEvent e = _send_queue.get();
+        if (e.status == osEventMessage) {
+            std::string *packet = (std::string*)e.value.p;
+            int size = _socket.sendTo(_endpoint, (char*)packet->data(), packet->size());
+            delete packet;
+        } else {
+            rtos::Thread::wait(1000);
+        }
+    }
+}
+
+bool M2MConnectionHandlerPimpl::send_data(uint8_t *data,
+                                          uint16_t data_len,
+                                          sn_nsdl_addr_s *address)
+{
+    if (address == NULL || data == NULL) {
+        return false;
+    }
+    
+    if (_use_secure_connection) {
+        if (_security_impl->send_message(data, data_len) < 0) {
+            return false;
+        }
+    } else {
+        if (send_to_socket(data, data_len) < 0) {
+            return false;
+        }
+    }
+    
+    _observer.data_sent();
+    return true;
+}
+
+bool M2MConnectionHandlerPimpl::start_listening_for_data()
+{
+    _listening = true;
+    return true;
+}
+
+void M2MConnectionHandlerPimpl::stop_listening()
+{
+    _listening = false;
+}
+
+void M2MConnectionHandlerPimpl::listen_handler()
+{
+    while (_running) {
+        if (_listening) {
+            memset(_listen_buffer, 0, sizeof _listen_buffer);
+            int size;
+            
+            if (_use_secure_connection) {
+                size = _security_impl->read(_listen_buffer, sizeof _listen_buffer);
+            } else {
+                size = receive_from_socket(_listen_buffer, sizeof _listen_buffer);
+            }
+            
+            if (size > 0) {
+                _observer.data_available((uint8_t*)_listen_buffer, size, _address);
+            } else if (size != 0) {
+                _listening = false;
+                _observer.socket_error(2);
+            }
+        } else {
+            rtos::Thread::wait(1000);
+        }
+    }
+}
+
+
+int M2MConnectionHandlerPimpl::send_to_socket(const unsigned char *buf, size_t len)
+{
+    if (_send_queue.put(new std::string(buf, buf+len)) != osOK) {
+        return M2MConnectionHandler::CONNECTION_ERROR_WANTS_WRITE;
+    } else {
+        return len;
+    }
+}
+
+int M2MConnectionHandlerPimpl::receive_from_socket(unsigned char *buf, size_t len)
+{
+    osEvent e = _recv_queue.get();
+    if (e.status == osEventMessage) {
+        std::string *packet = (std::string*)e.value.p;
+        int size = packet->size();
+        
+        if (size <= len) {
+            memcpy(buf, packet->data(), size);
+            delete packet;
+            return size;
+        }
+    }
+    
+    return M2MConnectionHandler::CONNECTION_ERROR_WANTS_READ;
+}
+
+void M2MConnectionHandlerPimpl::handle_connection_error(int /*error*/)
+{
+    _observer.socket_error(4);
+}