file struturce changed.

src/lib/ebus/port.cpp

@@ -0,0 +1,262 @@
+/*
+ * Copyright (C) Roland Jax 2012-2014 <ebusd@liwest.at>
+ *
+ * This file is part of ebusd.
+ *
+ * ebusd is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * ebusd 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ebusd. If not, see http://www.gnu.org/licenses/.
+ */
+
+#include "port.h"
+#include <cstdlib>
+#include <cstring>
+#include <termios.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <unistd.h>
+
+
+namespace libebus
+{
+
+
+bool Device::isOpen()
+{
+	if (isValid() == false)
+		m_open = false;
+
+	return m_open;
+}
+
+bool Device::isValid()
+{
+	if (m_noDeviceCheck == false) {
+		int port;
+
+		if (ioctl(m_fd, TIOCMGET, &port) == -1) {
+			closeDevice();
+			m_open = false;
+			return false;
+		}
+	}
+
+	return true;
+}
+
+ssize_t Device::sendBytes(const unsigned char* buffer, size_t nbytes)
+{
+	if (isValid() == false)
+		return -1;
+
+	// write bytes to device
+	return write(m_fd, buffer, nbytes);
+}
+
+ssize_t Device::recvBytes(const long timeout, size_t maxCount)
+{
+	if (isValid() == false)
+		return -1; // TODO RESULT_ERR_DEVICE
+
+	if (timeout > 0) {
+		fd_set readfds;
+		struct timeval tdiff;
+
+		// set select timeout
+		tdiff.tv_sec = 0;
+		tdiff.tv_usec = timeout;
+
+		FD_ZERO(&readfds);
+		FD_SET(m_fd, &readfds);
+
+		if (select(m_fd + 1, &readfds, NULL, NULL, &tdiff) != 1)
+			return -2; // TODO RESULT_ERR_TIMEOUT
+	}
+
+	if (maxCount > sizeof(m_buffer))
+		maxCount = sizeof(m_buffer);
+
+	// read bytes from device
+	ssize_t nbytes = read(m_fd, m_buffer, maxCount);
+
+	for (int i = 0; i < nbytes; i++)
+		m_recvBuffer.push(m_buffer[i]);
+
+	return nbytes;
+}
+
+unsigned char Device::getByte()
+{
+	unsigned char byte;
+
+	if (m_recvBuffer.empty() == false) {
+		byte = m_recvBuffer.front();
+		m_recvBuffer.pop();
+
+		return byte;
+	}
+
+	return 0;
+}
+
+
+void DeviceSerial::openDevice(const std::string deviceName, const bool noDeviceCheck)
+{
+	m_noDeviceCheck = noDeviceCheck;
+
+	termios newSettings;
+
+	m_open = false;
+
+	// open file descriptor from serial device
+	m_fd = open(deviceName.c_str(), O_RDWR | O_NOCTTY);
+
+	if (m_fd < 0)
+		return;
+
+	// save current settings of serial device
+	tcgetattr(m_fd, &m_oldSettings);
+
+	memset(&newSettings, '\0', sizeof(newSettings));
+
+	newSettings.c_cflag |= (B2400 | CS8 | CLOCAL | CREAD);
+	newSettings.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
+	newSettings.c_iflag |= IGNPAR;
+	newSettings.c_oflag &= ~OPOST;
+
+	newSettings.c_cc[VMIN]  = 1;
+	newSettings.c_cc[VTIME] = 0;
+
+	// empty device buffer
+	tcflush(m_fd, TCIOFLUSH);
+
+	// activate new settings of serial device
+	tcsetattr(m_fd, TCSANOW, &newSettings);
+
+	// set serial device into blocking mode
+	fcntl(m_fd, F_SETFL, fcntl(m_fd, F_GETFL) & ~O_NONBLOCK);
+
+	m_open = true;
+
+}
+
+void DeviceSerial::closeDevice()
+{
+	if (m_open == true) {
+		// empty device buffer
+		tcflush(m_fd, TCIOFLUSH);
+
+		// activate old settings of serial device
+		tcsetattr(m_fd, TCSANOW, &m_oldSettings);
+
+		// close file descriptor from serial device
+		close(m_fd);
+
+		m_fd = -1;
+		m_open = false;
+	}
+}
+
+
+void DeviceNetwork::openDevice(const std::string deviceName, const bool noDeviceCheck)
+{
+	m_noDeviceCheck = noDeviceCheck;
+
+	struct sockaddr_in sock;
+	char* hostport;
+	int ret;
+
+	m_open = false;
+
+	memset((char*) &sock, 0, sizeof(sock));
+
+	hostport = strdup(deviceName.c_str());
+	char* host = strtok(hostport, ":");
+	char* port = strtok(NULL, ":");
+
+	if (inet_addr(host) == INADDR_NONE) {
+		struct hostent* he;
+
+		he = gethostbyname(host);
+		if (he == NULL)
+			return;
+
+		memcpy(&sock.sin_addr, he->h_addr_list[0], he->h_length);
+	} else {
+		ret = inet_aton(host, &sock.sin_addr);
+		if (ret == 0)
+			return;
+	}
+
+	sock.sin_family = AF_INET;
+	sock.sin_port = htons(strtol(port, NULL, 10));
+
+	m_fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (m_fd < 0)
+		return;
+
+	ret = connect(m_fd, (struct sockaddr*) &sock, sizeof(sock));
+	if (ret < 0)
+		return;
+
+	free(hostport);
+	m_open = true;
+}
+
+void DeviceNetwork::closeDevice()
+{
+	if (m_open == true) {
+		// close file descriptor from network device
+		close(m_fd);
+
+		m_fd = -1;
+		m_open = false;
+	}
+}
+
+
+Port::Port(const std::string deviceName, const bool noDeviceCheck)
+	: m_deviceName(deviceName), m_noDeviceCheck(noDeviceCheck)
+{
+	m_device = NULL;
+
+	if (strchr(deviceName.c_str(), '/') == NULL &&
+	    strchr(deviceName.c_str(), ':') != NULL)
+		setType(NETWORK);
+	else
+		setType(SERIAL);
+}
+
+void Port::setType(const DeviceType type)
+{
+	if (m_device != NULL)
+		delete m_device;
+
+	switch (type) {
+	case SERIAL:
+		m_device = new DeviceSerial();
+		break;
+	case NETWORK:
+		m_device = new DeviceNetwork();
+		break;
+	};
+};
+
+
+} //namespace
+
+
+