200 lines
4 KiB
C++
Executable file
200 lines
4 KiB
C++
Executable file
/*
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WiFiClient.cpp - Library for Arduino Wifi shield.
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Copyright (c) 2011-2014 Arduino LLC. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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extern "C" {
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#include "utility/wl_definitions.h"
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#include "utility/wl_types.h"
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#include "string.h"
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#include "utility/debug.h"
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}
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#include "WiFi.h"
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#include "WiFiClient.h"
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#include "WiFiServer.h"
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#include "utility/server_drv.h"
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uint16_t WiFiClient::_srcport = 1024;
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WiFiClient::WiFiClient() : _sock(MAX_SOCK_NUM) {
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}
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WiFiClient::WiFiClient(uint8_t sock) : _sock(sock) {
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}
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int WiFiClient::connect(const char* host, uint16_t port) {
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IPAddress remote_addr;
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if (WiFi.hostByName(host, remote_addr))
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{
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return connect(remote_addr, port);
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}
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return 0;
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}
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int WiFiClient::connect(IPAddress ip, uint16_t port) {
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_sock = getFirstSocket();
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if (_sock != NO_SOCKET_AVAIL)
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{
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ServerDrv::startClient(uint32_t(ip), port, _sock);
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WiFiClass::_state[_sock] = _sock;
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unsigned long start = millis();
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// wait 4 second for the connection to close
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while (!connected() && millis() - start < 10000)
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delay(1);
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if (!connected())
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{
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return 0;
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}
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}else{
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Serial.println("No Socket available");
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return 0;
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}
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return 1;
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}
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size_t WiFiClient::write(uint8_t b) {
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return write(&b, 1);
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}
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size_t WiFiClient::write(const uint8_t *buf, size_t size) {
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if (_sock >= MAX_SOCK_NUM)
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{
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setWriteError();
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return 0;
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}
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if (size==0)
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{
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setWriteError();
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return 0;
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}
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if (!ServerDrv::sendData(_sock, buf, size))
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{
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setWriteError();
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return 0;
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}
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if (!ServerDrv::checkDataSent(_sock))
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{
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setWriteError();
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return 0;
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}
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return size;
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}
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int WiFiClient::available() {
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if (_sock != 255)
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{
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return ServerDrv::availData(_sock);
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}
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return 0;
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}
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int WiFiClient::read() {
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uint8_t b;
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if (!available())
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return -1;
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ServerDrv::getData(_sock, &b);
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return b;
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}
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int WiFiClient::read(uint8_t* buf, size_t size) {
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// sizeof(size_t) is architecture dependent
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// but we need a 16 bit data type here
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uint16_t _size = size;
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if (!ServerDrv::getDataBuf(_sock, buf, &_size))
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return -1;
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return 0;
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}
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int WiFiClient::peek() {
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uint8_t b;
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if (!available())
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return -1;
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ServerDrv::getData(_sock, &b, 1);
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return b;
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}
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void WiFiClient::flush() {
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// TODO: a real check to ensure transmission has been completed
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}
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void WiFiClient::stop() {
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if (_sock == 255)
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return;
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ServerDrv::stopClient(_sock);
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WiFiClass::_state[_sock] = NA_STATE;
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int count = 0;
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// wait maximum 5 secs for the connection to close
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while (status() != CLOSED && ++count < 50)
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delay(100);
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_sock = 255;
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}
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uint8_t WiFiClient::connected() {
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if (_sock == 255) {
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return 0;
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} else {
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uint8_t s = status();
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return !(s == LISTEN || s == CLOSED || s == FIN_WAIT_1 ||
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s == FIN_WAIT_2 || s == TIME_WAIT ||
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s == SYN_SENT || s== SYN_RCVD ||
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(s == CLOSE_WAIT));
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}
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}
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uint8_t WiFiClient::status() {
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if (_sock == 255) {
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return CLOSED;
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} else {
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return ServerDrv::getClientState(_sock);
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}
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}
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WiFiClient::operator bool() {
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return _sock != 255;
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}
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// Private Methods
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uint8_t WiFiClient::getFirstSocket()
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{
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for (int i = 0; i < MAX_SOCK_NUM; i++) {
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if (WiFiClass::_state[i] == NA_STATE)
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{
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return i;
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}
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}
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return SOCK_NOT_AVAIL;
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}
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