mirror of
https://github.com/g4klx/ircDDBGateway.git
synced 2026-04-06 06:43:52 +00:00
Initial commit.
This commit is contained in:
Jonathan Naylor
commit
12d55cef37
430 changed files with 72067 additions and 0 deletions
394
Common/DDHandler.cpp
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394
Common/DDHandler.cpp
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/*
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* Copyright (C) 2011,2012,2013 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "RepeaterHandler.h"
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#include "DDHandler.h"
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#include "Defs.h"
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#include <wx/filename.h>
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#if !defined(WIN32)
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// XXX Check these
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#include <net/if.h>
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#include <arpa/inet.h>
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#include <sys/ioctl.h>
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#include <linux/if_tun.h>
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#include <linux/sockios.h>
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#include <netinet/in.h>
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#endif
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const unsigned int ETHERNET_ADDRESS_LENGTH = 6U;
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const unsigned int ETHERNET_MTU = 1500U;
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const unsigned int BUFFER_LENGTH = 2000U;
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const unsigned int MIN_HEARD_TIME_SECS = 120U;
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const int MINIMUM_DD_FRAME_LENGTH = 60;
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const unsigned char ETHERNET_BROADCAST_ADDRESS[] = {0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU};
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// Multicast address '01:00:5E:00:00:01' - IP: '224.0.0.1' (send to all)
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const unsigned char TOALL_MULTICAST_ADDRESS[] = {0x01U, 0x00U, 0x5EU, 0x00U, 0x00U, 0x01U};
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// Multicast address '01:00:5E:00:00:23' - IP: '224.0.0.35' (DX-Cluster)
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const unsigned char DX_MULTICAST_ADDRESS[] = {0x01U, 0x00U, 0x5EU, 0x00U, 0x00U, 0x23U};
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CIRCDDB* CDDHandler::m_irc = NULL;
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CHeaderLogger* CDDHandler::m_headerLogger = NULL;
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int CDDHandler::m_fd = -1;
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unsigned int CDDHandler::m_maxRoutes = 0U;
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CEthernet** CDDHandler::m_list = NULL;
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unsigned char* CDDHandler::m_buffer = NULL;
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bool CDDHandler::m_logEnabled = false;
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wxString CDDHandler::m_logDir = wxEmptyString;
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wxString CDDHandler::m_name = wxEmptyString;
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CTimer CDDHandler::m_timer = CTimer(1000U, MIN_HEARD_TIME_SECS);
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CEthernet::CEthernet(const unsigned char* address, const wxString& callsign) :
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m_address(NULL),
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m_callsign(callsign)
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{
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wxASSERT(address != NULL);
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wxASSERT(!callsign.IsEmpty());
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m_address = new unsigned char[ETHERNET_ADDRESS_LENGTH];
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::memcpy(m_address, address, ETHERNET_ADDRESS_LENGTH);
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}
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CEthernet::~CEthernet()
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{
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delete[] m_address;
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}
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unsigned char* CEthernet::getAddress() const
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{
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return m_address;
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}
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wxString CEthernet::getCallsign() const
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{
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return m_callsign;
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}
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void CDDHandler::initialise(unsigned int maxRoutes, const wxString& name)
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{
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wxASSERT(maxRoutes > 0U);
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m_maxRoutes = maxRoutes;
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m_name = name;
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m_buffer = new unsigned char[BUFFER_LENGTH];
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m_list = new CEthernet*[maxRoutes];
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for (unsigned int i = 0U; i < maxRoutes; i++)
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m_list[i] = NULL;
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// Add a dummy entry for broadcasts
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m_list[0] = new CEthernet(ETHERNET_BROADCAST_ADDRESS, wxT(" "));
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// Add a dummy entry for "to all" multicast
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m_list[1] = new CEthernet(TOALL_MULTICAST_ADDRESS, wxT("CQCQCQ "));
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// Add a dummy entry for "DX-Cluster" multicast
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m_list[2] = new CEthernet(DX_MULTICAST_ADDRESS, wxT("CQCQCQ "));
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#if !defined(WIN32)
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m_fd = ::open("/dev/net/tun", O_RDWR);
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if (m_fd < 0) {
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wxLogError(wxT("Cannot open /dev/net/tun"));
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return;
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}
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struct ifreq ifr1;
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::memset(&ifr1, 0x00, sizeof(struct ifreq));
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ifr1.ifr_flags = IFF_TAP | IFF_NO_PI;
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::strcpy(ifr1.ifr_name, "tap%d");
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if (::ioctl(m_fd, TUNSETIFF, (void *)&ifr1) < 0) {
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wxLogError(wxT("TUNSETIFF ioctl failed, closing the tap device"));
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::close(m_fd);
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m_fd = -1;
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return;
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}
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wxString device = wxString(ifr1.ifr_name, wxConvLocal);
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wxLogMessage(wxT("DD mode Tap interface created on %s"), device.c_str());
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int fd = ::socket(AF_INET, SOCK_DGRAM, 0);
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if (fd < 0) {
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wxLogError(wxT("Unable to open the config socket, closing the tap device"));
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::close(m_fd);
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m_fd = -1;
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return;
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}
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struct ifreq ifr2;
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::memset(&ifr2, 0x00, sizeof(struct ifreq));
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::strcpy(ifr2.ifr_name, ifr1.ifr_name);
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ifr2.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_MULTICAST;
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if (::ioctl(fd, SIOCSIFFLAGS, (void *)&ifr2) < 0) {
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wxLogError(wxT("SIOCSIFFLAGS ioctl failed, closing the tap device"));
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::close(m_fd);
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m_fd = -1;
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return;
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}
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::close(fd);
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#endif
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}
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void CDDHandler::setLogging(bool enabled, const wxString& dir)
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{
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m_logDir = dir;
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m_logEnabled = enabled;
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}
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void CDDHandler::setHeaderLogger(CHeaderLogger* logger)
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{
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m_headerLogger = logger;
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}
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void CDDHandler::setIRC(CIRCDDB* irc)
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{
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wxASSERT(irc != NULL);
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m_irc = irc;
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}
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void CDDHandler::process(CDDData& data)
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{
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// If we're not initialised, return immediately
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if (m_maxRoutes == 0U)
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return;
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unsigned char flag1 = data.getFlag1();
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unsigned char flag2 = data.getFlag2();
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unsigned char flag3 = data.getFlag3();
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wxString myCall1 = data.getMyCall1();
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wxString myCall2 = data.getMyCall2();
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wxString yourCall = data.getYourCall();
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wxString rptCall1 = data.getRptCall1();
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wxString rptCall2 = data.getRptCall2();
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if (!m_timer.isRunning() || m_timer.hasExpired()) {
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// Write to Header.log if it's enabled
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if (m_headerLogger != NULL)
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m_headerLogger->write(wxT("Repeater"), data);
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if (m_irc != NULL) {
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m_irc->sendHeardWithTXMsg(myCall1, myCall2, yourCall, rptCall1, rptCall2, flag1, flag2, flag3, wxEmptyString, wxT("Digital Data "));
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m_irc->sendHeardWithTXStats(myCall1, myCall2, yourCall, rptCall1, rptCall2, flag1, flag2, flag3, 1, 0, -1);
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}
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m_timer.start();
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}
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// Can we continue?
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if (m_fd < 0)
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return;
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unsigned char* address = data.getSourceAddress();
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bool found = false;
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for (unsigned int i = 0U; i < m_maxRoutes; i++) {
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if (m_list[i] != NULL) {
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unsigned char* addr = m_list[i]->getAddress();
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if (::memcmp(addr, address, ETHERNET_ADDRESS_LENGTH) == 0) {
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found = true;
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break;
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}
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}
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}
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if (!found) {
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wxLogMessage(wxT("Adding DD user %s with ethernet address %02X:%02X:%02X:%02X:%02X:%02X"), myCall1.c_str(),
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address[0], address[1], address[2], address[3], address[4], address[5]);
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CEthernet* ethernet = new CEthernet(address, myCall1);
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found = false;
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for (unsigned int i = 0U; i < m_maxRoutes; i++) {
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if (m_list[i] == NULL) {
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m_list[i] = ethernet;
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found = true;
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if (m_logEnabled)
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writeStatus(*ethernet);
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break;
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}
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}
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if (!found) {
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wxLogError(wxT("No space to add new DD ethernet address"));
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delete ethernet;
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return;
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}
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}
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#if !defined(WIN32)
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unsigned int length = data.getEthernetFrame(m_buffer, BUFFER_LENGTH);
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ssize_t len = ::write(m_fd, (char*)m_buffer, length);
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if (len != ssize_t(length))
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wxLogError(wxT("Error returned from write()"));
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#endif
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}
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CDDData* CDDHandler::read()
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{
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// If we're not initialised, return immediately
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if (m_maxRoutes == 0U)
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return NULL;
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#if defined(WIN32)
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return NULL;
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#else
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// Check that the read() won't block
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fd_set readFds;
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FD_ZERO(&readFds);
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#if defined(__WINDOWS__)
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FD_SET((unsigned int)m_fd, &readFds);
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#else
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FD_SET(m_fd, &readFds);
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#endif
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// Return immediately
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timeval tv;
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tv.tv_sec = 0L;
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tv.tv_usec = 0L;
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int ret = ::select(m_fd + 1, &readFds, NULL, NULL, &tv);
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if (ret < 0) {
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wxLogError(wxT("Error returned from select()"));
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return NULL;
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}
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#if defined(__WINDOWS__)
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if (!FD_ISSET((unsigned int)m_fd, &readFds))
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return NULL;
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#else
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if (!FD_ISSET(m_fd, &readFds))
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return NULL;
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#endif
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// Ensure that the minimum length is padded with 0x00s
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::memset(m_buffer, 0x00U, MINIMUM_DD_FRAME_LENGTH);
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ssize_t len = ::read(m_fd, (char*)m_buffer, BUFFER_LENGTH);
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if (len <= 0) {
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wxLogError(wxT("Error returned from read()"));
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return NULL;
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}
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// There seems to be a minimum size with DD mode, so pad with zeroes if it's not reached
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if (len < MINIMUM_DD_FRAME_LENGTH)
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len = MINIMUM_DD_FRAME_LENGTH;
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// Point to the destination ethernet address
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unsigned char* address = m_buffer + 0U;
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// Do destination address to callsign lookup
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CEthernet* ethernet = NULL;
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for (unsigned int i = 0U; i < m_maxRoutes; i++) {
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if (m_list[i] != NULL) {
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unsigned char* addr = m_list[i]->getAddress();
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if (::memcmp(addr, address, ETHERNET_ADDRESS_LENGTH) == 0) {
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ethernet = m_list[i];
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break;
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}
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}
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}
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if (ethernet == NULL) {
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wxLogWarning(wxT("Cannot find the ethernet address of %02X:%02X:%02X:%02X:%02X:%02X in the ethernet list"), address[0], address[1], address[2], address[3], address[4], address[5]);
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return NULL;
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}
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CRepeaterHandler* handler = CRepeaterHandler::findDDRepeater();
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if (handler == NULL) {
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wxLogWarning(wxT("Incoming DD data to unknown repeater"));
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return NULL;
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}
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// wxLogMessage(wxT("Mapping ethernet address %02X:%02X:%02X:%02X:%02X:%02X to user %s"),
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// address[0], address[1], address[2], address[3], address[4], address[5],
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// ethernet->getCallsign().c_str());
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CDDData* data = new CDDData;
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data->setEthernetFrame(m_buffer, len);
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data->setYourCall(ethernet->getCallsign());
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handler->process(*data);
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return data;
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#endif
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}
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void CDDHandler::clock(unsigned int ms)
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{
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m_timer.clock(ms);
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}
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void CDDHandler::finalise()
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{
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#if !defined(WIN32)
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if (m_fd >= 0) {
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::close(m_fd);
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m_fd = -1;
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}
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#endif
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delete[] m_buffer;
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for (unsigned int i = 0U; i < m_maxRoutes; i++)
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delete m_list[i];
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delete[] m_list;
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}
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void CDDHandler::writeStatus(const CEthernet& ethernet)
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{
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wxString fullName = DDMODE_BASE_NAME;
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if (!m_name.IsEmpty()) {
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fullName.Append(wxT("_"));
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fullName.Append(m_name);
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}
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wxFileName fileName(m_logDir, fullName, wxT("log"));
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wxFFile file;
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bool ret = file.Open(fileName.GetFullPath(), wxT("at"));
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if (!ret) {
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wxLogError(wxT("Unable to open %s for writing"), fileName.GetFullPath().c_str());
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return;
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}
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wxString callsign = ethernet.getCallsign();
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unsigned char* address = ethernet.getAddress();
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time_t timeNow = ::time(NULL);
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struct tm* tm = ::gmtime(&timeNow);
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wxString text;
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text.Printf(wxT("%04d-%02d-%02d %02d:%02d:%02d: %02X:%02X:%02X:%02X:%02X:%02X %s\n"),
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tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,
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address[0], address[1], address[2], address[3], address[4], address[5], callsign.c_str());
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file.Write(text);
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file.Close();
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}
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