1 | /* |
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2 | * |
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3 | * Copyright (c) 2007-2016 The University of Waikato, Hamilton, New Zealand. |
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4 | * All rights reserved. |
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5 | * |
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6 | * This file is part of libtrace. |
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7 | * |
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8 | * This code has been developed by the University of Waikato WAND |
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9 | * research group. For further information please see http://www.wand.net.nz/ |
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10 | * |
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11 | * libtrace is free software; you can redistribute it and/or modify |
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12 | * it under the terms of the GNU Lesser General Public License as published by |
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13 | * the Free Software Foundation; either version 3 of the License, or |
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14 | * (at your option) any later version. |
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15 | * |
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16 | * libtrace is distributed in the hope that it will be useful, |
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 | * GNU Lesser General Public License for more details. |
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20 | * |
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21 | * You should have received a copy of the GNU Lesser General Public License |
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22 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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23 | * |
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24 | * |
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25 | */ |
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26 | |
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27 | |
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28 | #include <netdb.h> |
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29 | #include <inttypes.h> |
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30 | #include <lt_inttypes.h> |
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31 | #include <stdio.h> |
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32 | #include "libtrace.h" |
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33 | #include "tracereport.h" |
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34 | #include "report.h" |
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35 | |
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36 | static uint64_t rx_errors = 0; |
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37 | static uint64_t ip_errors = 0; |
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38 | static uint64_t tcp_errors = 0; |
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39 | |
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40 | void error_per_packet(struct libtrace_packet_t *packet) |
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41 | { |
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42 | struct libtrace_ip *ip = trace_get_ip(packet); |
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43 | struct libtrace_tcp *tcp = trace_get_tcp(packet); |
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44 | void *link = trace_get_packet_buffer(packet,NULL,NULL); |
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45 | if (!link) { |
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46 | ++rx_errors; |
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47 | } |
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48 | |
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49 | /* This isn't quite as simple as it seems. |
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50 | * |
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51 | * If the packets were captured via wdcap's anonymisation module, |
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52 | * the checksum is set to 0 when it is correct and 1 if incorrect. |
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53 | * |
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54 | * If a different capture method is used, there's a good chance the |
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55 | * checksum has not been altered |
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56 | */ |
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57 | if (ip) { |
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58 | if (ntohs(ip->ip_sum)!=0) |
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59 | ++ip_errors; |
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60 | } |
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61 | if (tcp) { |
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62 | if (ntohs(tcp->check)!=0) |
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63 | ++tcp_errors; |
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64 | } |
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65 | } |
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66 | |
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67 | void error_report(void) |
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68 | { |
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69 | FILE *out = fopen("error.rpt", "w"); |
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70 | if (!out) { |
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71 | perror("fopen"); |
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72 | return; |
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73 | } |
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74 | |
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75 | fprintf(out, "RX Errors: %" PRIu64 "\n",rx_errors); |
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76 | fprintf(out, "IP Checksum errors: %" PRIu64 "\n",ip_errors); |
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77 | /*printf("TCP Checksum errors: %" PRIu64 "\n",tcp_errors); */ |
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78 | |
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79 | fclose(out); |
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80 | } |
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