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/*
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 <YunClient.h>
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);
}
int YunClient::connect(IPAddress ip, uint16_t port) {
String address;
address.reserve(18);
address += ip[0];
address += '.';
address += ip[1];
address += '.';
address += ip[2];
address += '.';
address += ip[3];
return connect(address.c_str(), port);
}
int YunClient::connect(const char *host, uint16_t port) {
uint8_t tmp[] = {
'C',
(port >> 8) & 0xFF,
port & 0xFF
};
uint8_t res[1];
int l = bridge.transfer(tmp, 3, (const uint8_t *)host, strlen(host), res, 1);
if (l==0)
return 0;
handle = res[0];
// wait for connection
uint8_t tmp2[] = { 'c', handle };
uint8_t res2[1];
while (true) {
bridge.transfer(tmp2, 2, res2, 1);
if (res2[0] == 0)
break;
delay(1);
}
opened = true;
// check for successful connection
if (connected())
return 1;
opened = false;
handle = 0;
return 0;
}
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