| OZ++ Sample: NetlinkWatcher |
/****************************************************************************** * * Copyright (c) 2015 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer. * * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * NetlinkWatcher.cpp * *****************************************************************************/ #include <oz++/CommonObject.h> #include <oz++/LocalDateTime.h> #include <oz++/Exception.h> #include <oz++/SmartArray.h> #include <oz++/Thread.h> #include <oz++/CharString.h> #include <oz++/LinkedList.h> #include <oz++/netlink/SocketNetlink.h> #include <oz++/netlink/SockAddrNetlink.h> #include <oz++/netlink/LinkLayerAttribute.h> #include <oz++/netlink/NetlinkMsgHeader.h> #include <oz++/netlink/LinkLayerMsg.h> #include <oz++/motif/ApplicationView.h> #include <oz++/motif/TableView.h> namespace OZ { class NetlinkWatcher: public Thread { private: View* view; SocketNetlink socketNetlink; SockAddrNetlink addr; bool looping; public: NetlinkWatcher(View* v) :Thread(), view(v) { looping = true; } ~NetlinkWatcher() { socketNetlink.close(); } int bind() { addr.setFamily(AF_NETLINK); addr.setGroups(RTMGRP_LINK); return socketNetlink.bind(addr); } void recv() { while (looping) { char buffer[4096]; bzero(buffer, sizeof(buffer)); //Blocking recv from the socketNetlink. int n = socketNetlink.recv(buffer, sizeof(buffer), 0); if ( n < 0 ){ perror("recv"); break; } try { NetlinkMsgHeader netlinkMsgHeader(buffer, n); if (netlinkMsgHeader.isDone() || netlinkMsgHeader.isError()) { break; } do { LocalDateTime dateTime; CharString now = dateTime.nowToSeconds(); LinkLayerMsg linkLayerMsg(netlinkMsgHeader.data()); LinkLayerAttribute attribute(netlinkMsgHeader, linkLayerMsg); do { attribute.parse(); } while (attribute.next() ); LinkedListT<Property> list; list.add(new Property("DateTime", (const char*)now)); linkLayerMsg.getMinPropertyList(list); //Call updateModel view -> updateModel(&list); } while (netlinkMsgHeader.next()); } catch (Exception& ex) { caught(ex); } } } void stop() { looping = false; socketNetlink.close(); } void run() { try { this -> bind(); this -> recv(); } catch (Exception& ex) { caught(ex); } } }; class MainView :public ApplicationView { private: SmartPtr<TableView> table; SmartArray<CharString*> model; SmartPtr<NetlinkWatcher> watcher; private: virtual void updateModel(CommonObject* object) { if (object) { //Update model LinkedListT<Property>* list = (LinkedListT<Property>*)object; model.removeAllItems(); size_t size = list->getLength(); for (size_t i = 0; i < size; i++) { Property* prop = list->getNth(i); model[i] = new CharString(prop -> value()); } //Call updateView updateView(); } } virtual void updateView() { table -> removeAllItems(); int size = model.getSize(); for (int i = 0; i<size; i++) { CharString* value = model[i]; if (value) { printf("%d %s\n", i, (const char*)(*value)); table -> setItem(i, 0, (const char*)(*value)); } } // Call flush to update items of the table immediately. flush(); } public: MainView(Application& applet, const char* name, Args& args) :ApplicationView(applet, name, args) { ColumnData columnData[] = { {"Value", 500, XmALIGNMENT_BEGINNING}, }; RowData rowData[] = { {"DateTime", 160, XmALIGNMENT_BEGINNING}, {"IFINFO family", 0, XmALIGNMENT_BEGINNING}, {"IFINFO type", 0, XmALIGNMENT_BEGINNING}, {"IFINFO index", 0, XmALIGNMENT_BEGINNING}, {"IFINFO flags", 0, XmALIGNMENT_BEGINNING}, {"IFINFO change", 0, XmALIGNMENT_BEGINNING}, {"IFLA ifname", 0, XmALIGNMENT_BEGINNING}, {"IFLA address", 0, XmALIGNMENT_BEGINNING}, {"IFLA broadcast", 0, XmALIGNMENT_BEGINNING}, }; int numColumns = XtNumber(columnData); int numRows = XtNumber(rowData); Args ar; ar.set(XmNtableNumColumns, numColumns); ar.set(XmNtableColumnData, (XtArgVal)columnData); ar.set(XmNtableNumRows, numRows); ar.set(XmNtableRowData, (XtArgVal)rowData); table = new TableView(this, "", ar); table -> removeAllItems(); watcher = new NetlinkWatcher(this); watcher -> start(); } ~MainView() { watcher -> cancel(); watcher -> wait(); //delete watcher; model.clear(); } }; } // int main(int argc, char** argv){ try { const char* appclass = "NetlinkWatcher"; Application applet(appclass, argc, argv); Args args; args.set(XmNgeometry, "700x240"); MainView view(applet, argv[0], args); view.realize(); applet.run(); } catch (Exception& ex) { caught(ex); } return 0; }