examples/pcap2nbench/ethernet.cpp

   1 /*\
   2  *  pcap2nbench - Converts libpcap network traces to nbench input
   3  *  Copyright (C) 2004  Jim McDonough <jmcd@us.ibm.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *  Written by Anthony Liguori <aliguori@us.ibm.com>
  20 \*/
  21
  22 #include <netinet/in.h>
  23
  24 #include "ethernet.hpp"
  25
  26 ethernet::ethernet(const uint8_t *data, size_t length) {
  27   if (length < 14) {
  28     std::cerr << "Invalid ethernet packet" << std::endl;
  29   }
  30   memcpy(dst, data, sizeof(dst));
  31   memcpy(src, data + 6, sizeof(src));
  32   memcpy(&type, data + 12, sizeof(type));
  33   type = ntohs(type);
  34 }
  35
  36 std::ostream &operator<<(std::ostream &lhs, const ethernet &rhs)
  37 {
  38   lhs << "Destination: ";
  39   for (int i = 0; i < 6; i++) {
  40     char buf[3];
  41     sprintf(buf, "%.2x", rhs.dst[i]);
  42     if (i) lhs << ":";
  43     lhs << buf;
  44   }
  45   lhs << std::endl;
  46
  47   lhs << "Source: ";
  48   for (int i = 0; i < 6; i++) {
  49     char buf[3];
  50     sprintf(buf, "%.2x", rhs.src[i]);
  51     if (i) lhs << ":";
  52     lhs << buf;
  53   }
  54   lhs << std::endl;
  55
  56   lhs << "Type: ";
  57   char buf[7];
  58   sprintf(buf, "%.4x", rhs.type);
  59   lhs << buf << std::endl;
  60
  61   return lhs;
  62 }