PacketReader.cpp
author Markus Bröker <mbroeker@largo.homelinux.org>
Sat, 13 Dec 2008 15:47:48 +0100
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parent 0 826dd5531eb0
child 8 6097dc1fe2cf
permissions -rw-r--r--
PacketWriter.cpp: cstdlib header added Source Base indented with GNU indent
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/*
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 *  $Id: PacketReader.cpp 54 2008-01-10 00:24:52Z mbroeker $
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 * $URL: http://localhost/svn/cpp/qMonitor/trunk/PacketReader.cpp $
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 */
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#include <PacketReader.h>
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PacketReader::PacketReader (int tm)
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{
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    timeout = tm;
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    if ((p_socket = socket (PF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) == -1) {
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        perror ("SocketException");
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        throw std::runtime_error ("SocketException: root access required");
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    }
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}
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PacketReader::PacketReader (std::string filename)
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{
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    if ((p_socket = open (filename.c_str (), O_RDONLY)) == -1) {
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        throw std::runtime_error ("FileException");
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    }
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    timeout = -1;
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}
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PacketReader::~PacketReader ()
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{
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    close (p_socket);
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}
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std::string PacketReader::read ()
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{
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    static char s[IP_MAXPACKET + 1];
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    int c;
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    c =::read (p_socket, s, IP_MAXPACKET);
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    s[c] = 0;
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    return std::string (s, c);
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}
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bool PacketReader::ready ()
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{
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    if (p_socket)
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        return true;
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    return false;
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}
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bool PacketReader::dataAvailable ()
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{
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    pollfd fdin;
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    int event = 1;
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    fdin.fd = p_socket;
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    fdin.events = POLLIN;
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    fdin.revents = 0;
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    if (poll (&fdin, event, timeout) > 0)
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        return true;
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    return false;
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}