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WiFi/WiFiClient.cpp

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+/*
+  WiFiClient.cpp - Library for Arduino Wifi shield.
+  Copyright (c) 2011-2014 Arduino.  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
+*/
+
+extern "C" {
+  #include "utility/wl_definitions.h"
+  #include "utility/wl_types.h"
+  #include "string.h"
+  #include "utility/debug.h"
+}
+
+#include "WiFi.h"
+#include "WiFiClient.h"
+#include "WiFiServer.h"
+#include "utility/server_drv.h"
+
+
+uint16_t WiFiClient::_srcport = 1024;
+
+WiFiClient::WiFiClient() : _sock(MAX_SOCK_NUM) {
+}
+
+WiFiClient::WiFiClient(uint8_t sock) : _sock(sock) {
+}
+
+int WiFiClient::connect(const char* host, uint16_t port) {
+	IPAddress remote_addr;
+	if (WiFi.hostByName(host, remote_addr))
+	{
+		return connect(remote_addr, port);
+	}
+	return 0;
+}
+
+int WiFiClient::connect(IPAddress ip, uint16_t port) {
+    _sock = getFirstSocket();
+    if (_sock != NO_SOCKET_AVAIL)
+    {
+    	ServerDrv::startClient(uint32_t(ip), port, _sock);
+    	WiFiClass::_state[_sock] = _sock;
+
+    	unsigned long start = millis();
+
+    	// wait 4 second for the connection to close
+    	while (!connected() && millis() - start < 10000)
+    		delay(1);
+
+    	if (!connected())
+       	{
+    		return 0;
+    	}
+    }else{
+    	Serial.println("No Socket available");
+    	return 0;
+    }
+    return 1;
+}
+
+size_t WiFiClient::write(uint8_t b) {
+	  return write(&b, 1);
+}
+
+size_t WiFiClient::write(const uint8_t *buf, size_t size) {
+  if (_sock >= MAX_SOCK_NUM)
+  {
+	  setWriteError();
+	  return 0;
+  }
+  if (size==0)
+  {
+	  setWriteError();
+      return 0;
+  }
+
+
+  if (!ServerDrv::sendData(_sock, buf, size))
+  {
+	  setWriteError();
+      return 0;
+  }
+  if (!ServerDrv::checkDataSent(_sock))
+  {
+	  setWriteError();
+      return 0;
+  }
+
+  return size;
+}
+
+int WiFiClient::available() {
+  if (_sock != 255)
+  {
+      return ServerDrv::availData(_sock);
+  }
+   
+  return 0;
+}
+
+int WiFiClient::read() {
+  uint8_t b;
+  if (!available())
+    return -1;
+
+  ServerDrv::getData(_sock, &b);
+  return b;
+}
+
+
+int WiFiClient::read(uint8_t* buf, size_t size) {
+  // sizeof(size_t) is architecture dependent
+  // but we need a 16 bit data type here
+  uint16_t _size = size;
+  if (!ServerDrv::getDataBuf(_sock, buf, &_size))
+      return -1;
+  return 0;
+}
+
+int WiFiClient::peek() {
+	  uint8_t b;
+	  if (!available())
+	    return -1;
+
+	  ServerDrv::getData(_sock, &b, 1);
+	  return b;
+}
+
+void WiFiClient::flush() {
+  while (available())
+    read();
+}
+
+void WiFiClient::stop() {
+
+  if (_sock == 255)
+    return;
+
+  ServerDrv::stopClient(_sock);
+  WiFiClass::_state[_sock] = NA_STATE;
+
+  int count = 0;
+  // wait maximum 5 secs for the connection to close
+  while (status() != CLOSED && ++count < 50)
+    delay(100);
+
+  _sock = 255;
+}
+
+uint8_t WiFiClient::connected() {
+
+  if (_sock == 255) {
+    return 0;
+  } else {
+    uint8_t s = status();
+
+    return !(s == LISTEN || s == CLOSED || s == FIN_WAIT_1 ||
+    		s == FIN_WAIT_2 || s == TIME_WAIT ||
+    		s == SYN_SENT || s== SYN_RCVD ||
+    		(s == CLOSE_WAIT));
+  }
+}
+
+uint8_t WiFiClient::status() {
+    if (_sock == 255) {
+    return CLOSED;
+  } else {
+    return ServerDrv::getClientState(_sock);
+  }
+}
+
+WiFiClient::operator bool() {
+  return _sock != 255;
+}
+
+// Private Methods
+uint8_t WiFiClient::getFirstSocket()
+{
+    for (int i = 0; i < MAX_SOCK_NUM; i++) {
+      if (WiFiClass::_state[i] == NA_STATE)
+      {
+          return i;
+      }
+    }
+    return SOCK_NOT_AVAIL;
+}
+