OZ++ Class: InterfaceNameIndex |
/****************************************************************************** * * 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. * * * InterfaceNameIndex.h * *****************************************************************************/ //2015/03/28 Motified not to use String class. #pragma once #include <oz++/CommonObject.h> #include <oz++/SocketDatagram.h> #include <oz++/CharString.h> #include <linux/if.h> namespace OZ { class InterfaceNameIndex { private: SocketDatagram sock; public: InterfaceNameIndex() { } ~InterfaceNameIndex() { sock.close(); } CharString name(int ifindex) { struct ifreq ifr; const int len = sizeof(ifr.ifr_name); char ifname[len + 1]; bzero(ifname, sizeof(ifname)); memset(&ifr, 0, sizeof(struct ifreq)); ifr.ifr_ifindex = ifindex; if (sock.ioctl(SIOCGIFNAME, &ifr) >= 0) { strcpy(ifname, ifr.ifr_name); } else { throw IException("Invalid ifindex %d", ifindex); } return CharString(ifname); } int index(const char* ifname) { int index = -1; struct ifreq ifr; memset(&ifr, 0, sizeof(struct ifreq)); const size_t len = sizeof(ifr.ifr_name); if (ifname != NULL && strlen(ifname) < len) { strcpy (ifr.ifr_name, ifname); if (sock.ioctl(SIOCGIFINDEX, &ifr) >= 0) { index = ifr.ifr_ifindex; } else { throw IException("Invalid argument %s", ifname); } } else { throw IException("Invalid argument %s", ifname); } return index; } }; }