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 3 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  *  Written by Anthony Liguori <aliguori@us.ibm.com>
  19 \*/
  20
  21 #include <netinet/in.h>
  22
  23 #include "ethernet.hpp"
  24
  25 ethernet::ethernet(const uint8_t *data, size_t length) {
  26   if (length < 14) {
  27     std::cerr << "Invalid ethernet packet" << std::endl;
  28   }
  29   memcpy(dst, data, sizeof(dst));
  30   memcpy(src, data + 6, sizeof(src));
  31   memcpy(&type, data + 12, sizeof(type));
  32   type = ntohs(type);
  33 }
  34
  35 std::ostream &operator<<(std::ostream &lhs, const ethernet &rhs)
  36 {
  37   lhs << "Destination: ";
  38   for (int i = 0; i < 6; i++) {
  39     char buf[3];
  40     sprintf(buf, "%.2x", rhs.dst[i]);
  41     if (i) lhs << ":";
  42     lhs << buf;
  43   }
  44   lhs << std::endl;
  45
  46   lhs << "Source: ";
  47   for (int i = 0; i < 6; i++) {
  48     char buf[3];
  49     sprintf(buf, "%.2x", rhs.src[i]);
  50     if (i) lhs << ":";
  51     lhs << buf;
  52   }
  53   lhs << std::endl;
  54
  55   lhs << "Type: ";
  56   char buf[7];
  57   sprintf(buf, "%.4x", rhs.type);
  58   lhs << buf << std::endl;
  59
  60   return lhs;
  61 }