1 | /* |
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2 | * This file is part of libtrace |
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3 | * |
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4 | * Copyright (c) 2007 The University of Waikato, Hamilton, New Zealand. |
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5 | * Authors: Richard Sanger |
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6 | * |
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7 | * All rights reserved. |
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8 | * |
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9 | * This code has been developed by the University of Waikato WAND |
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10 | * research group. For further information please see http://www.wand.net.nz/ |
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11 | * |
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12 | * libtrace is free software; you can redistribute it and/or modify |
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13 | * it under the terms of the GNU General Public License as published by |
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14 | * the Free Software Foundation; either version 2 of the License, or |
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15 | * (at your option) any later version. |
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16 | * |
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17 | * libtrace is distributed in the hope that it will be useful, |
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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20 | * GNU General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU General Public License |
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23 | * along with libtrace; if not, write to the Free Software |
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24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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25 | * |
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26 | * $Id$ |
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27 | * |
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28 | */ |
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29 | |
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30 | #ifndef WIN32 |
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31 | #include <sys/time.h> |
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32 | #endif |
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33 | #include <stdio.h> |
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34 | #include <stdlib.h> |
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35 | #include <assert.h> |
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36 | #include <sys/types.h> |
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37 | #include <signal.h> |
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38 | #include <unistd.h> |
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39 | #include "libtrace_parallel.h" |
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40 | |
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41 | static double timeval_to_seconds(struct timeval tv) { |
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42 | return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; |
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43 | } |
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44 | |
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45 | static void iferr(libtrace_t *trace,const char *msg) |
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46 | { |
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47 | libtrace_err_t err = trace_get_err(trace); |
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48 | if (err.err_num==0) |
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49 | return; |
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50 | printf("Error: %s: %s\n", msg, err.problem); |
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51 | exit(1); |
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52 | } |
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53 | |
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54 | static bool check_range_jitter(double test, double target, double jit) { |
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55 | if ((test <= target + jit) && (test >= target - jit)) { |
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56 | return true; |
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57 | } else { |
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58 | printf("Have:%f Expected:%f (%f-%f)", test, target, target - jit, target + jit); |
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59 | return false; |
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60 | } |
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61 | } |
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62 | |
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63 | |
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64 | static int totalpkts = 0; |
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65 | static int skippedpkts = 0; |
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66 | static int expected; |
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67 | |
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68 | libtrace_t *trace = NULL; |
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69 | static void signal_handler(int signal) |
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70 | { |
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71 | int i = 0; |
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72 | if (signal == SIGALRM) { |
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73 | trace_ppause(trace); |
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74 | |
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75 | /* check within 10 seconds we got 9-11 packets */ |
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76 | assert(check_range_jitter(10.0, (double) totalpkts, 1.0)); |
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77 | |
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78 | /* Now fullspeed it */ |
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79 | trace_parallel_config(trace, TRACE_OPTION_TRACETIME, &i); |
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80 | |
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81 | /* And restart */ |
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82 | trace_pstart(trace, NULL, NULL, NULL); |
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83 | } |
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84 | } |
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85 | |
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86 | static void report_result(libtrace_t *trace UNUSED, int mesg, |
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87 | libtrace_generic_t data, |
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88 | libtrace_thread_t *sender UNUSED) { |
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89 | |
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90 | switch (mesg) { |
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91 | case MESSAGE_STARTING: |
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92 | break; |
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93 | case MESSAGE_RESULT: |
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94 | switch (data.res->type) { |
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95 | case RESULT_USER: |
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96 | totalpkts++; |
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97 | break; |
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98 | case RESULT_USER+1: |
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99 | skippedpkts++; |
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100 | break; |
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101 | } |
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102 | break; |
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103 | } |
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104 | } |
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105 | |
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106 | static void* per_packet(libtrace_t *trace, libtrace_thread_t *t, |
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107 | int mesg, libtrace_generic_t data, |
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108 | libtrace_thread_t *sender UNUSED) { |
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109 | struct timeval tv; |
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110 | double time; |
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111 | libtrace_message_t message; |
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112 | static __thread bool accepting = true; |
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113 | |
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114 | gettimeofday(&tv, NULL); |
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115 | time = timeval_to_seconds(tv); |
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116 | |
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117 | switch (mesg) { |
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118 | case MESSAGE_PACKET: |
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119 | /* In order to instantly pause a trace we don't delay any buffered packets |
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120 | * These are sent after MESSAGE_PAUSING has been received */ |
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121 | if (accepting) { |
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122 | fprintf(stderr, "."); |
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123 | trace_publish_result(trace, t, (uint64_t) time, (libtrace_generic_t){.rdouble = time}, RESULT_USER); |
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124 | |
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125 | /* Check that we are not blocking regular message delivery */ |
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126 | message.code = MESSAGE_USER; |
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127 | message.sender = t; |
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128 | message.data.rdouble = time; |
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129 | trace_message_perpkts(trace, &message); |
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130 | } else { |
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131 | trace_publish_result(trace, t, (uint64_t) time, (libtrace_generic_t){.rdouble = time}, RESULT_USER+1); |
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132 | } |
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133 | return data.pkt; |
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134 | case MESSAGE_USER: |
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135 | assert (check_range_jitter(data.rdouble, time, 0.01)); |
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136 | break; |
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137 | case MESSAGE_RESUMING: |
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138 | accepting = true; |
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139 | break; |
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140 | case MESSAGE_PAUSING: |
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141 | accepting = false; |
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142 | break; |
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143 | } |
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144 | return NULL; |
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145 | } |
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146 | |
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147 | /** |
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148 | * Test that tracetime playback functions. |
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149 | * Including: |
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150 | * * Delaying packets |
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151 | * * Not blocking messages |
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152 | * * Instantly returning when paused (or stopped) |
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153 | * * Can be switched off/on from a paused state |
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154 | */ |
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155 | int test_tracetime(const char *tracename) { |
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156 | int error = 0; |
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157 | int i; |
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158 | struct timeval tv; |
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159 | double start, end; |
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160 | gettimeofday(&tv, NULL); |
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161 | start = timeval_to_seconds(tv); |
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162 | printf("Testing delay\n"); |
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163 | |
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164 | // Create the trace |
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165 | trace = trace_create(tracename); |
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166 | iferr(trace,tracename); |
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167 | |
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168 | // Always use 2 threads for simplicity |
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169 | i = 2; |
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170 | trace_parallel_config(trace, TRACE_OPTION_SET_PERPKT_THREAD_COUNT, &i); |
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171 | i = 1; |
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172 | trace_parallel_config(trace, TRACE_OPTION_TRACETIME, &i); |
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173 | |
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174 | // Start it |
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175 | trace_pstart(trace, NULL, per_packet, report_result); |
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176 | iferr(trace,tracename); |
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177 | fprintf(stderr, "Running in tracetime (Will take about 10 seconds)\t"); |
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178 | |
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179 | // Timeout after 10 which should be about 10 packets seconds |
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180 | alarm(10); |
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181 | |
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182 | /* Wait for all threads to stop */ |
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183 | trace_join(trace); |
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184 | |
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185 | /* Now check we have all received all the packets */ |
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186 | assert(skippedpkts <= 20); /* Note this is hard coded to the default burst_sizeX2 */ |
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187 | if (error == 0) { |
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188 | if (totalpkts + skippedpkts == expected) { |
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189 | printf("success: %d packets read\n",expected); |
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190 | } else { |
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191 | printf("failure: %d packets expected, %d seen\n",expected,totalpkts); |
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192 | error = 1; |
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193 | } |
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194 | } else { |
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195 | iferr(trace,tracename); |
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196 | } |
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197 | /* The whole test should take about 10 seconds */ |
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198 | gettimeofday(&tv, NULL); |
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199 | end = timeval_to_seconds(tv); |
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200 | assert(check_range_jitter(end-start, 10.0, 1.0)); |
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201 | trace_destroy(trace); |
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202 | return error; |
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203 | } |
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204 | |
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205 | int main() { |
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206 | int error = 0; |
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207 | const char *tracename; |
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208 | expected = 100; |
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209 | |
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210 | signal(SIGALRM, signal_handler); |
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211 | |
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212 | tracename = "pcapfile:traces/100_seconds.pcap"; |
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213 | |
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214 | error = test_tracetime(tracename); |
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215 | |
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216 | return error; |
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217 | } |
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