From 66b1a7ea395c04d971dc666dfe3274778adbaf1e Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@bug.st>
Date: Fri, 28 Jun 2013 09:49:22 +0200
Subject: Bridge: added YunServer and TunClient class

---
 libraries/Bridge/YunServer.cpp | 145 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 libraries/Bridge/YunServer.cpp

(limited to 'libraries/Bridge/YunServer.cpp')

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);
+}
-- 
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