Bridge: added YunServer and TunClient class

2 files changed, 232 insertions, 0 deletions

diff --git a/libraries/Bridge/YunServer.cpp b/libraries/Bridge/YunServer.cpp
new file mode 100644
index 0000000..c6d54e4
--- /dev/null
+++ b/libraries/Bridge/YunServer.cpp
@@ -0,0 +1,145 @@
+/*
+  Copyright (c) 2013 Arduino LLC. All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include <YunServer.h>
+
+YunServer::YunServer(uint16_t _p, BridgeClass &_b) :
+  bridge(_b), port(_p), listening(false) {
+}
+
+void YunServer::begin() {
+  uint8_t tmp[] = {
+    'N',
+    (port >> 8) & 0xFF,
+    port & 0xFF
+  };
+  uint8_t res[1];
+  bridge.transfer(tmp, 3, (const uint8_t *)"0.0.0.0", 7, res, 1);
+  listening = (res[0] == 1);
+}
+
+YunClient YunServer::accept() {
+  uint8_t cmd[] = {'k'};
+  uint8_t res[1];
+  unsigned int l = bridge.transfer(cmd, 1, res, 1);
+  if (l==0)
+    return YunClient();
+  return YunClient(res[0]);
+}
+
+YunClient::YunClient(int _h, BridgeClass &_b) :
+  bridge(_b), handle(_h), opened(true), buffered(0) {
+}
+
+YunClient::YunClient(BridgeClass &_b) :
+  bridge(_b), handle(0), opened(false), buffered(0) {
+}
+
+YunClient::~YunClient() {
+}
+
+YunClient& YunClient::operator=(const YunClient &_x) {
+	opened = _x.opened;
+	handle = _x.handle;
+	return *this;
+}
+
+void YunClient::stop() {
+  if (opened) {
+    uint8_t cmd[] = {'j', handle};
+    bridge.transfer(cmd, 2);
+  }
+  opened = false;
+}
+
+void YunClient::doBuffer() {
+  // If there are already char in buffer exit
+  if (buffered > 0)
+    return;
+
+  // Try to buffer up to 32 characters
+  readPos = 0;
+  uint8_t cmd[] = {'K', handle, sizeof(buffer)};
+  buffered = bridge.transfer(cmd, 3, buffer, sizeof(buffer));
+}
+
+int YunClient::available() {
+  // Look if there is new data available
+  doBuffer();
+  return buffered;
+}
+
+int YunClient::read() {
+  doBuffer();
+  if (buffered == 0)
+    return -1; // no chars available
+  else {
+    buffered--;
+    return buffer[readPos++];
+  }
+}
+
+int YunClient::read(uint8_t *buff, size_t size) {
+  int readed = 0;
+  do {
+	if (buffered == 0) {
+	  doBuffer();
+      if (buffered == 0)
+        return readed;
+	}
+	buff[readed++] = buffer[readPos++];
+	buffered--;
+  } while (readed < size);
+  return readed;
+}
+
+int YunClient::peek() {
+  doBuffer();
+  if (buffered == 0)
+    return -1; // no chars available
+  else
+    return buffer[readPos];
+}
+
+size_t YunClient::write(uint8_t c) {
+  if (!opened)
+    return 0;
+  uint8_t cmd[] = {'l', handle, c};
+  bridge.transfer(cmd, 3);
+  return 1;
+}
+
+size_t YunClient::write(const uint8_t *buf, size_t size) {
+  if (!opened)
+    return 0;
+  uint8_t cmd[] = {'l', handle};
+  bridge.transfer(cmd, 2, buf, size, NULL, 0);
+  return size;
+}
+
+void YunClient::flush() {
+}
+
+uint8_t YunClient::connected() {
+  if (!opened)
+    return false;
+  uint8_t cmd[] = {'L', handle};
+  uint8_t res[1];
+  bridge.transfer(cmd, 2, res, 1);
+  return (res[0] == 1);
+}
diff --git a/libraries/Bridge/YunServer.h b/libraries/Bridge/YunServer.h
new file mode 100644
index 0000000..e1be55a
--- /dev/null
+++ b/libraries/Bridge/YunServer.h
@@ -0,0 +1,87 @@
+/*
+  Copyright (c) 2013 Arduino LLC. All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef CONNECTOR_H_
+#define CONNECTOR_H_
+
+#include <Bridge.h>
+#include <Server.h>
+#include <Client.h>
+
+class YunClient;
+
+class YunServer : public Server {
+public:
+  // Constructor with a user provided BridgeClass instance
+  YunServer(uint16_t port, BridgeClass &_b = Bridge);
+
+  void begin();
+  YunClient accept();
+
+  virtual size_t write(uint8_t c) { /* TODO */ }
+
+private:
+  uint16_t port;
+  bool listening;
+  BridgeClass &bridge;
+};
+
+class YunClient : public Client {
+public:
+  // Constructor with a user provided BridgeClass instance
+  YunClient(int _h, BridgeClass &_b = Bridge);
+  YunClient(BridgeClass &_b = Bridge);
+  ~YunClient();
+  
+  // Stream methods 
+  // (read message)
+  virtual int available();
+  virtual int read();
+  virtual int read(uint8_t *buf, size_t size);
+  virtual int peek();
+  // (write response)
+  virtual size_t write(uint8_t);
+  virtual size_t write(const uint8_t *buf, size_t size);
+  virtual void flush();
+  // TODO: add optimized function for block write
+  
+  virtual operator bool () { return opened; }
+
+  YunClient& operator=(const YunClient &_x);
+
+  virtual void stop();
+  virtual uint8_t connected();
+
+  virtual int connect(IPAddress ip, uint16_t port) { /* TODO */ };
+  virtual int connect(const char *host, uint16_t port) { /* TODO */ };
+
+private:
+  BridgeClass &bridge;
+  unsigned int handle;
+  boolean opened;
+
+private:
+  void doBuffer();
+  uint8_t buffered;
+  uint8_t readPos;
+  static const int BUFFER_SIZE = 64;
+  uint8_t buffer[BUFFER_SIZE];
+  
+};
+
+#endif // CONNECTOR_H_