1 | /* |
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2 | * This file is part of libtrace |
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3 | * |
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4 | * Copyright (c) 2004 The University of Waikato, Hamilton, New Zealand. |
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5 | * Authors: Daniel Lawson |
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6 | * Perry Lorier |
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7 | * Shane Alcock |
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8 | * |
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9 | * All rights reserved. |
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10 | * |
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11 | * This code has been developed by the University of Waikato WAND |
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12 | * research group. For further information please see http://www.wand.net.nz/ |
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13 | * |
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14 | * libtrace is free software; you can redistribute it and/or modify |
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15 | * it under the terms of the GNU General Public License as published by |
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16 | * the Free Software Foundation; either version 2 of the License, or |
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17 | * (at your option) any later version. |
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18 | * |
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19 | * libtrace is distributed in the hope that it will be useful, |
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20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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22 | * GNU General Public License for more details. |
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23 | * |
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24 | * You should have received a copy of the GNU General Public License |
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25 | * along with libtrace; if not, write to the Free Software |
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26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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27 | * |
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28 | * $Id$ |
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29 | * |
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30 | */ |
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31 | |
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32 | #define _GNU_SOURCE |
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33 | |
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34 | #include "config.h" |
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35 | #include "common.h" |
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36 | #include "libtrace.h" |
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37 | #include "libtrace_int.h" |
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38 | #include "format_helper.h" |
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39 | #include "parse_cmd.h" |
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40 | #include "rt_protocol.h" |
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41 | |
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42 | #include <sys/stat.h> |
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43 | #include <assert.h> |
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44 | #include <errno.h> |
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45 | #include <fcntl.h> |
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46 | #include <stdio.h> |
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47 | #include <string.h> |
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48 | #include <stdlib.h> |
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49 | |
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50 | #ifndef WIN32 |
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51 | # include <netdb.h> |
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52 | #endif |
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53 | |
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54 | #define RT_INFO ((struct rt_format_data_t*)libtrace->format_data) |
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55 | |
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56 | char *rt_deny_reason(uint8_t reason) { |
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57 | char *string = 0; |
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58 | |
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59 | switch(reason) { |
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60 | case RT_DENY_WRAPPER: |
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61 | string = "Rejected by TCP Wrappers"; |
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62 | break; |
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63 | case RT_DENY_FULL: |
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64 | string = "Max connections reached on server"; |
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65 | break; |
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66 | case RT_DENY_AUTH: |
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67 | string = "Authentication failed"; |
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68 | break; |
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69 | default: |
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70 | string = "Unknown reason"; |
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71 | } |
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72 | |
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73 | return string; |
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74 | } |
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75 | |
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76 | |
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77 | struct rt_format_data_t { |
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78 | char *hostname; |
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79 | int port; |
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80 | int input_fd; |
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81 | int reliable; |
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82 | char *pkt_buffer; |
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83 | char *buf_current; |
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84 | int buf_filled; |
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85 | rt_header_t rt_hdr; |
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86 | |
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87 | libtrace_t *dummy_duck; |
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88 | libtrace_t *dummy_erf; |
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89 | libtrace_t *dummy_pcap; |
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90 | libtrace_t *dummy_wag; |
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91 | libtrace_t *dummy_linux; |
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92 | }; |
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93 | |
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94 | static int rt_connect(libtrace_t *libtrace) { |
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95 | struct hostent *he; |
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96 | struct sockaddr_in remote; |
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97 | rt_header_t connect_msg; |
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98 | rt_deny_conn_t deny_hdr; |
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99 | rt_hello_t hello_opts; |
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100 | uint8_t reason; |
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101 | |
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102 | if ((he=gethostbyname(RT_INFO->hostname)) == NULL) { |
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103 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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104 | "Failed to convert hostname %s to address", |
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105 | RT_INFO->hostname); |
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106 | return -1; |
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107 | } |
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108 | if ((RT_INFO->input_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
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109 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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110 | "Could not create socket"); |
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111 | return -1; |
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112 | } |
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113 | |
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114 | remote.sin_family = AF_INET; |
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115 | remote.sin_port = htons(RT_INFO->port); |
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116 | remote.sin_addr = *((struct in_addr *)he->h_addr); |
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117 | memset(&(remote.sin_zero), 0, 8); |
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118 | |
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119 | if (connect(RT_INFO->input_fd, (struct sockaddr *)&remote, |
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120 | sizeof(struct sockaddr)) == -1) { |
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121 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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122 | "Could not connect to host %s on port %d", |
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123 | RT_INFO->hostname, RT_INFO->port); |
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124 | return -1; |
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125 | } |
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126 | |
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127 | |
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128 | #if 0 |
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129 | oldflags = fcntl(RT_INFO->input_fd, F_GETFL, 0); |
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130 | if (oldflags == -1) { |
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131 | trace_set_err(libtrace, errno, |
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132 | "Could not get fd flags from fd %d\n", |
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133 | RT_INFO->input_fd); |
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134 | return -1; |
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135 | } |
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136 | oldflags |= O_NONBLOCK; |
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137 | if (fcntl(RT_INFO->input_fd, F_SETFL, oldflags) == -1) { |
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138 | trace_set_err(libtrace, errno, |
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139 | "Could not set fd flags for fd %d\n", |
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140 | RT_INFO->input_fd); |
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141 | return -1; |
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142 | } |
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143 | #endif |
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144 | |
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145 | |
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146 | /* We are connected, now receive message from server */ |
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147 | |
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148 | if (recv(RT_INFO->input_fd, (void*)&connect_msg, sizeof(rt_header_t), 0) != sizeof(rt_header_t) ) { |
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149 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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150 | "Could not receive connection message from %s", |
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151 | RT_INFO->hostname); |
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152 | return -1; |
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153 | } |
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154 | |
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155 | switch (connect_msg.type) { |
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156 | case RT_DENY_CONN: |
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157 | |
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158 | if (recv(RT_INFO->input_fd, (void*)&deny_hdr, |
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159 | sizeof(rt_deny_conn_t), |
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160 | 0) != sizeof(rt_deny_conn_t)) { |
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161 | reason = 0; |
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162 | } |
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163 | reason = deny_hdr.reason; |
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164 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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165 | "Connection attempt is denied: %s", |
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166 | rt_deny_reason(reason)); |
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167 | return -1; |
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168 | case RT_HELLO: |
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169 | /* do something with options */ |
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170 | if (recv(RT_INFO->input_fd, (void*)&hello_opts, |
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171 | sizeof(rt_hello_t), 0) |
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172 | != sizeof(rt_hello_t)) { |
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173 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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174 | "Failed to receive RT_HELLO options"); |
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175 | return -1; |
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176 | } |
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177 | RT_INFO->reliable = hello_opts.reliable; |
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178 | |
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179 | return 0; |
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180 | default: |
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181 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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182 | "Unknown message type received: %d", |
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183 | connect_msg.type); |
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184 | return -1; |
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185 | } |
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186 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
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187 | "Somehow you managed to reach this unreachable code"); |
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188 | return -1; |
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189 | } |
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190 | |
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191 | |
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192 | static int rt_init_input(libtrace_t *libtrace) { |
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193 | char *scan; |
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194 | char *uridata = libtrace->uridata; |
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195 | libtrace->format_data = malloc(sizeof(struct rt_format_data_t)); |
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196 | |
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197 | RT_INFO->dummy_duck = NULL; |
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198 | RT_INFO->dummy_erf = NULL; |
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199 | RT_INFO->dummy_pcap = NULL; |
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200 | RT_INFO->dummy_wag = NULL; |
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201 | RT_INFO->dummy_linux = NULL; |
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202 | RT_INFO->pkt_buffer = NULL; |
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203 | RT_INFO->buf_current = NULL; |
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204 | RT_INFO->buf_filled = 0; |
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205 | |
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206 | if (strlen(uridata) == 0) { |
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207 | RT_INFO->hostname = |
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208 | strdup("localhost"); |
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209 | RT_INFO->port = |
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210 | COLLECTOR_PORT; |
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211 | } else { |
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212 | if ((scan = strchr(uridata,':')) == NULL) { |
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213 | RT_INFO->hostname = |
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214 | strdup(uridata); |
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215 | RT_INFO->port = |
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216 | COLLECTOR_PORT; |
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217 | } else { |
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218 | RT_INFO->hostname = |
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219 | (char *)strndup(uridata, |
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220 | (scan - uridata)); |
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221 | RT_INFO->port = |
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222 | atoi(++scan); |
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223 | } |
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224 | } |
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225 | |
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226 | return 0; |
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227 | } |
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228 | |
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229 | static int rt_start_input(libtrace_t *libtrace) { |
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230 | rt_header_t start_msg; |
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231 | |
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232 | start_msg.type = RT_START; |
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233 | start_msg.length = 0; |
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234 | |
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235 | if (rt_connect(libtrace) == -1) |
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236 | return -1; |
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237 | |
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238 | /* Need to send start message to server */ |
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239 | if (send(RT_INFO->input_fd, (void*)&start_msg, sizeof(rt_header_t) + |
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240 | start_msg.length, 0) != sizeof(rt_header_t)) { |
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241 | printf("Failed to send start message to server\n"); |
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242 | return -1; |
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243 | } |
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244 | RT_INFO->rt_hdr.type = RT_LAST; |
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245 | |
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246 | return 0; |
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247 | } |
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248 | |
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249 | static int rt_pause_input(libtrace_t *libtrace) { |
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250 | close(RT_INFO->input_fd); |
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251 | return 0; |
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252 | } |
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253 | |
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254 | static int rt_fin_input(libtrace_t *libtrace) { |
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255 | rt_header_t close_msg; |
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256 | |
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257 | close_msg.type = RT_CLOSE; |
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258 | close_msg.length = 0; |
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259 | |
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260 | /* Send a close message to the server */ |
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261 | if (send(RT_INFO->input_fd, (void*)&close_msg, sizeof(rt_header_t) + |
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262 | close_msg.length, 0) != sizeof(rt_header_t) |
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263 | + close_msg.length) { |
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264 | printf("Failed to send close message to server\n"); |
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265 | |
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266 | } |
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267 | if (RT_INFO->dummy_duck) |
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268 | trace_destroy_dead(RT_INFO->dummy_duck); |
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269 | |
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270 | if (RT_INFO->dummy_erf) |
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271 | trace_destroy_dead(RT_INFO->dummy_erf); |
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272 | |
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273 | if (RT_INFO->dummy_pcap) |
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274 | trace_destroy_dead(RT_INFO->dummy_pcap); |
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275 | |
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276 | if (RT_INFO->dummy_wag) |
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277 | trace_destroy_dead(RT_INFO->dummy_wag); |
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278 | |
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279 | if (RT_INFO->dummy_linux) |
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280 | trace_destroy_dead(RT_INFO->dummy_linux); |
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281 | |
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282 | close(RT_INFO->input_fd); |
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283 | free(libtrace->format_data); |
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284 | return 0; |
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285 | } |
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286 | |
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287 | #define RT_BUF_SIZE 4000 |
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288 | |
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289 | static int rt_read(libtrace_t *libtrace, void **buffer, size_t len, int block) { |
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290 | int numbytes; |
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291 | |
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292 | assert(len <= RT_BUF_SIZE); |
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293 | |
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294 | if (!RT_INFO->pkt_buffer) { |
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295 | RT_INFO->pkt_buffer = malloc(RT_BUF_SIZE); |
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296 | RT_INFO->buf_current = RT_INFO->pkt_buffer; |
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297 | RT_INFO->buf_filled = 0; |
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298 | } |
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299 | |
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300 | #ifndef MSG_DONTWAIT |
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301 | #define MSG_DONTWAIT 0 |
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302 | #endif |
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303 | |
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304 | if (block) |
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305 | block=0; |
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306 | else |
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307 | block=MSG_DONTWAIT; |
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308 | |
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309 | |
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310 | if (len > RT_INFO->buf_filled) { |
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311 | memcpy(RT_INFO->pkt_buffer, RT_INFO->buf_current, |
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312 | RT_INFO->buf_filled); |
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313 | RT_INFO->buf_current = RT_INFO->pkt_buffer; |
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314 | |
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315 | #ifndef MSG_NOSIGNAL |
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316 | # define MSG_NOSIGNAL 0 |
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317 | #endif |
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318 | while (len > RT_INFO->buf_filled) { |
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319 | if ((numbytes = recv(RT_INFO->input_fd, |
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320 | RT_INFO->buf_current + |
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321 | RT_INFO->buf_filled, |
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322 | RT_BUF_SIZE-RT_INFO->buf_filled, |
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323 | MSG_NOSIGNAL|block)) <= 0) { |
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324 | if (numbytes == 0) { |
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325 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, |
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326 | "No data received"); |
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327 | return -1; |
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328 | } |
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329 | |
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330 | if (errno == EINTR) { |
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331 | /* ignore EINTR in case |
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332 | * a caller is using signals |
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333 | */ |
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334 | continue; |
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335 | } |
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336 | if (errno == EAGAIN) { |
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337 | trace_set_err(libtrace, |
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338 | EAGAIN, |
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339 | "EAGAIN"); |
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340 | return -1; |
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341 | } |
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342 | |
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343 | perror("recv"); |
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344 | trace_set_err(libtrace, errno, |
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345 | "Failed to read data into rt recv buffer"); |
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346 | return -1; |
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347 | } |
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348 | /* |
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349 | buf_ptr = RT_INFO->pkt_buffer; |
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350 | for (i = 0; i < RT_BUF_SIZE ; i++) { |
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351 | |
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352 | printf("%02x", (unsigned char)*buf_ptr); |
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353 | buf_ptr ++; |
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354 | } |
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355 | printf("\n"); |
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356 | */ |
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357 | RT_INFO->buf_filled+=numbytes; |
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358 | } |
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359 | |
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360 | } |
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361 | *buffer = RT_INFO->buf_current; |
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362 | RT_INFO->buf_current += len; |
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363 | RT_INFO->buf_filled -= len; |
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364 | assert(RT_INFO->buf_filled >= 0); |
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365 | return len; |
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366 | } |
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367 | |
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368 | |
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369 | static int rt_set_format(libtrace_t *libtrace, libtrace_packet_t *packet) |
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370 | { |
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371 | |
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372 | if (packet->type >= RT_DATA_PCAP) { |
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373 | if (!RT_INFO->dummy_pcap) { |
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374 | RT_INFO->dummy_pcap = trace_create_dead("pcap:-"); |
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375 | } |
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376 | packet->trace = RT_INFO->dummy_pcap; |
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377 | return 0; |
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378 | } |
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379 | |
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380 | switch (packet->type) { |
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381 | case RT_DUCK_2_4: |
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382 | case RT_DUCK_2_5: |
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383 | if (!RT_INFO->dummy_duck) { |
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384 | RT_INFO->dummy_duck = trace_create_dead("duck:dummy"); |
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385 | } |
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386 | packet->trace = RT_INFO->dummy_duck; |
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387 | break; |
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388 | case RT_DATA_ERF: |
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389 | if (!RT_INFO->dummy_erf) { |
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390 | RT_INFO->dummy_erf = trace_create_dead("erf:-"); |
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391 | } |
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392 | packet->trace = RT_INFO->dummy_erf; |
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393 | break; |
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394 | case RT_DATA_WAG: |
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395 | if (!RT_INFO->dummy_wag) { |
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396 | RT_INFO->dummy_wag = trace_create_dead("wtf:-"); |
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397 | } |
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398 | packet->trace = RT_INFO->dummy_wag; |
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399 | break; |
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400 | case RT_DATA_LINUX_NATIVE: |
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401 | if (!RT_INFO->dummy_linux) { |
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402 | RT_INFO->dummy_linux = trace_create_dead("int:"); |
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403 | } |
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404 | packet->trace = RT_INFO->dummy_linux; |
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405 | break; |
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406 | case RT_DATA_LEGACY_ETH: |
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407 | case RT_DATA_LEGACY_ATM: |
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408 | case RT_DATA_LEGACY_POS: |
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409 | printf("Sending legacy over RT is currently not supported\n"); |
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410 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, "Legacy packet cannot be sent over rt"); |
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411 | return -1; |
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412 | default: |
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413 | printf("Unrecognised format: %d\n", packet->type); |
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414 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, "Unrecognised packet format"); |
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415 | return -1; |
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416 | } |
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417 | return 0; /* success */ |
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418 | } |
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419 | |
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420 | static void rt_set_payload(libtrace_packet_t *packet) { |
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421 | dag_record_t *erfptr; |
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422 | |
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423 | switch (packet->type) { |
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424 | case RT_DATA_ERF: |
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425 | erfptr = (dag_record_t *)packet->header; |
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426 | |
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427 | if (erfptr->flags.rxerror == 1) { |
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428 | packet->payload = NULL; |
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429 | break; |
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430 | } |
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431 | /* else drop into the default case */ |
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432 | default: |
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433 | packet->payload = (char *)packet->buffer + |
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434 | trace_get_framing_length(packet); |
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435 | break; |
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436 | } |
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437 | } |
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438 | |
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439 | static int rt_send_ack(libtrace_t *libtrace, |
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440 | uint32_t seqno) { |
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441 | |
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442 | static char *ack_buffer = 0; |
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443 | char *buf_ptr; |
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444 | int numbytes = 0; |
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445 | int to_write = 0; |
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446 | rt_header_t *hdr; |
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447 | rt_ack_t *ack_hdr; |
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448 | |
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449 | if (!ack_buffer) { |
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450 | ack_buffer = malloc(sizeof(rt_header_t) + sizeof(rt_ack_t)); |
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451 | } |
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452 | |
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453 | hdr = (rt_header_t *) ack_buffer; |
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454 | ack_hdr = (rt_ack_t *) (ack_buffer + sizeof(rt_header_t)); |
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455 | |
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456 | hdr->type = RT_ACK; |
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457 | hdr->length = sizeof(rt_ack_t); |
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458 | |
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459 | ack_hdr->sequence = seqno; |
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460 | |
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461 | to_write = hdr->length + sizeof(rt_header_t); |
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462 | buf_ptr = ack_buffer; |
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463 | |
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464 | while (to_write > 0) { |
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465 | numbytes = send(RT_INFO->input_fd, buf_ptr, to_write, 0); |
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466 | if (numbytes == -1) { |
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467 | if (errno == EINTR || errno == EAGAIN) { |
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468 | continue; |
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469 | } |
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470 | else { |
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471 | printf("Error sending ack\n"); |
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472 | perror("send"); |
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473 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, |
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474 | "Error sending ack"); |
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475 | return -1; |
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476 | } |
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477 | } |
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478 | to_write = to_write - numbytes; |
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479 | buf_ptr = buf_ptr + to_write; |
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480 | |
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481 | } |
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482 | |
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483 | return 1; |
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484 | } |
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485 | |
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486 | |
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487 | static int rt_read_packet_versatile(libtrace_t *libtrace, |
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488 | libtrace_packet_t *packet,int blocking) { |
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489 | rt_header_t *pkt_hdr = NULL; |
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490 | void *void_hdr; |
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491 | |
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492 | if (packet->buf_control == TRACE_CTRL_PACKET) { |
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493 | packet->buf_control = TRACE_CTRL_EXTERNAL; |
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494 | free(packet->buffer); |
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495 | packet->buffer = NULL; |
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496 | } |
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497 | |
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498 | /* RT_LAST means that the next bytes received should be a |
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499 | * rt header - I know it's hax and maybe I'll fix it later on */ |
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500 | if (RT_INFO->rt_hdr.type == RT_LAST) { |
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501 | void_hdr = (void *)pkt_hdr; |
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502 | |
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503 | /* FIXME: Better error handling required */ |
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504 | if (rt_read(libtrace, &void_hdr, |
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505 | sizeof(rt_header_t),blocking) != |
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506 | sizeof(rt_header_t)) { |
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507 | return -1; |
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508 | } |
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509 | pkt_hdr = (rt_header_t *)void_hdr; |
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510 | |
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511 | /* Need to salvage these in case the next rt_read overwrites |
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512 | * the buffer they came from! */ |
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513 | RT_INFO->rt_hdr.type = pkt_hdr->type; |
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514 | RT_INFO->rt_hdr.length = pkt_hdr->length; |
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515 | RT_INFO->rt_hdr.sequence = pkt_hdr->sequence; |
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516 | } |
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517 | packet->type = RT_INFO->rt_hdr.type; |
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518 | |
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519 | if (packet->type >= RT_DATA_SIMPLE) { |
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520 | if (rt_read(libtrace, &packet->buffer, RT_INFO->rt_hdr.length,blocking) != RT_INFO->rt_hdr.length) { |
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521 | return -1; |
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522 | } |
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523 | packet->header = packet->buffer; |
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524 | |
---|
525 | if (RT_INFO->reliable > 0) { |
---|
526 | if (rt_send_ack(libtrace, RT_INFO->rt_hdr.sequence) |
---|
527 | == -1) |
---|
528 | { |
---|
529 | return -1; |
---|
530 | } |
---|
531 | } |
---|
532 | |
---|
533 | |
---|
534 | if (rt_set_format(libtrace, packet) < 0) { |
---|
535 | return -1; |
---|
536 | } |
---|
537 | rt_set_payload(packet); |
---|
538 | } else { |
---|
539 | switch(packet->type) { |
---|
540 | case RT_STATUS: |
---|
541 | if (rt_read(libtrace, &packet->buffer, |
---|
542 | RT_INFO->rt_hdr.length, blocking) != |
---|
543 | RT_INFO->rt_hdr.length) { |
---|
544 | return -1; |
---|
545 | } |
---|
546 | packet->header = 0; |
---|
547 | packet->payload = packet->buffer; |
---|
548 | break; |
---|
549 | case RT_DUCK_2_4: |
---|
550 | case RT_DUCK_2_5: |
---|
551 | if (rt_read(libtrace, &packet->buffer, |
---|
552 | RT_INFO->rt_hdr.length, blocking) != |
---|
553 | RT_INFO->rt_hdr.length) { |
---|
554 | return -1; |
---|
555 | } |
---|
556 | if (rt_set_format(libtrace, packet) < 0) { |
---|
557 | return -1; |
---|
558 | } |
---|
559 | packet->header = 0; |
---|
560 | packet->payload = packet->buffer; |
---|
561 | break; |
---|
562 | case RT_END_DATA: |
---|
563 | break; |
---|
564 | case RT_PAUSE_ACK: |
---|
565 | /* FIXME: Do something useful */ |
---|
566 | break; |
---|
567 | case RT_OPTION: |
---|
568 | /* FIXME: Do something useful here as well */ |
---|
569 | break; |
---|
570 | case RT_KEYCHANGE: |
---|
571 | break; |
---|
572 | case RT_LOSTCONN: |
---|
573 | break; |
---|
574 | default: |
---|
575 | printf("Bad rt type for client receipt: %d\n", |
---|
576 | packet->type); |
---|
577 | return -1; |
---|
578 | } |
---|
579 | } |
---|
580 | /* Return the number of bytes read from the stream */ |
---|
581 | RT_INFO->rt_hdr.type = RT_LAST; |
---|
582 | return RT_INFO->rt_hdr.length; |
---|
583 | } |
---|
584 | |
---|
585 | static int rt_read_packet(libtrace_t *libtrace, |
---|
586 | libtrace_packet_t *packet) { |
---|
587 | return rt_read_packet_versatile(libtrace,packet,1); |
---|
588 | } |
---|
589 | |
---|
590 | |
---|
591 | static int rt_get_capture_length(const libtrace_packet_t *packet) { |
---|
592 | switch (packet->type) { |
---|
593 | case RT_STATUS: |
---|
594 | return sizeof(rt_status_t); |
---|
595 | case RT_HELLO: |
---|
596 | return sizeof(rt_hello_t); |
---|
597 | case RT_START: |
---|
598 | return 0; |
---|
599 | case RT_ACK: |
---|
600 | return sizeof(rt_ack_t); |
---|
601 | case RT_END_DATA: |
---|
602 | return 0; |
---|
603 | case RT_CLOSE: |
---|
604 | return 0; |
---|
605 | case RT_DENY_CONN: |
---|
606 | return sizeof(rt_deny_conn_t); |
---|
607 | case RT_PAUSE: |
---|
608 | return 0; |
---|
609 | case RT_PAUSE_ACK: |
---|
610 | return 0; |
---|
611 | case RT_OPTION: |
---|
612 | return 0; /* FIXME */ |
---|
613 | case RT_KEYCHANGE: |
---|
614 | return 0; |
---|
615 | case RT_LOSTCONN: |
---|
616 | return 0; |
---|
617 | } |
---|
618 | printf("Unknown type: %d\n", packet->type); |
---|
619 | return 0; |
---|
620 | } |
---|
621 | |
---|
622 | static int rt_get_wire_length(const libtrace_packet_t *packet) { |
---|
623 | return 0; |
---|
624 | } |
---|
625 | |
---|
626 | static int rt_get_framing_length(const libtrace_packet_t *packet) { |
---|
627 | return 0; |
---|
628 | } |
---|
629 | |
---|
630 | static int rt_get_fd(const libtrace_t *trace) { |
---|
631 | return ((struct rt_format_data_t *)trace->format_data)->input_fd; |
---|
632 | } |
---|
633 | |
---|
634 | libtrace_eventobj_t trace_event_rt(libtrace_t *trace, libtrace_packet_t *packet) { |
---|
635 | libtrace_eventobj_t event = {0,0,0.0,0}; |
---|
636 | libtrace_err_t read_err; |
---|
637 | |
---|
638 | assert(trace); |
---|
639 | assert(packet); |
---|
640 | |
---|
641 | if (trace->format->get_fd) { |
---|
642 | event.fd = trace->format->get_fd(trace); |
---|
643 | } else { |
---|
644 | event.fd = 0; |
---|
645 | } |
---|
646 | |
---|
647 | event.size = rt_read_packet_versatile(trace, packet, 0); |
---|
648 | if (event.size == -1) { |
---|
649 | read_err = trace_get_err(trace); |
---|
650 | if (read_err.err_num == EAGAIN) { |
---|
651 | event.type = TRACE_EVENT_IOWAIT; |
---|
652 | } |
---|
653 | else { |
---|
654 | event.type = TRACE_EVENT_PACKET; |
---|
655 | } |
---|
656 | } else if (event.size == 0) { |
---|
657 | if (packet->type == RT_END_DATA) |
---|
658 | event.type = TRACE_EVENT_TERMINATE; |
---|
659 | else |
---|
660 | event.type = TRACE_EVENT_PACKET; |
---|
661 | |
---|
662 | } |
---|
663 | else { |
---|
664 | event.type = TRACE_EVENT_PACKET; |
---|
665 | } |
---|
666 | |
---|
667 | return event; |
---|
668 | } |
---|
669 | |
---|
670 | static void rt_help() { |
---|
671 | printf("rt format module\n"); |
---|
672 | printf("Supported input URIs:\n"); |
---|
673 | printf("\trt:hostname:port\n"); |
---|
674 | printf("\trt:hostname (connects on default port)\n"); |
---|
675 | printf("\n"); |
---|
676 | printf("\te.g.: rt:localhost\n"); |
---|
677 | printf("\te.g.: rt:localhost:32500\n"); |
---|
678 | printf("\n"); |
---|
679 | |
---|
680 | } |
---|
681 | |
---|
682 | |
---|
683 | static struct libtrace_format_t rt = { |
---|
684 | "rt", |
---|
685 | "$Id$", |
---|
686 | TRACE_FORMAT_RT, |
---|
687 | rt_init_input, /* init_input */ |
---|
688 | NULL, /* config_input */ |
---|
689 | rt_start_input, /* start_input */ |
---|
690 | rt_pause_input, /* pause */ |
---|
691 | NULL, /* init_output */ |
---|
692 | NULL, /* config_output */ |
---|
693 | NULL, /* start_output */ |
---|
694 | rt_fin_input, /* fin_input */ |
---|
695 | NULL, /* fin_output */ |
---|
696 | rt_read_packet, /* read_packet */ |
---|
697 | NULL, /* fin_packet */ |
---|
698 | NULL, /* write_packet */ |
---|
699 | NULL, /* get_link_type */ |
---|
700 | NULL, /* get_direction */ |
---|
701 | NULL, /* set_direction */ |
---|
702 | NULL, /* get_erf_timestamp */ |
---|
703 | NULL, /* get_timeval */ |
---|
704 | NULL, /* get_seconds */ |
---|
705 | NULL, /* seek_erf */ |
---|
706 | NULL, /* seek_timeval */ |
---|
707 | NULL, /* seek_seconds */ |
---|
708 | rt_get_capture_length, /* get_capture_length */ |
---|
709 | rt_get_wire_length, /* get_wire_length */ |
---|
710 | rt_get_framing_length, /* get_framing_length */ |
---|
711 | NULL, /* set_capture_length */ |
---|
712 | rt_get_fd, /* get_fd */ |
---|
713 | trace_event_rt, /* trace_event */ |
---|
714 | rt_help, /* help */ |
---|
715 | NULL /* next pointer */ |
---|
716 | }; |
---|
717 | |
---|
718 | void rt_constructor() { |
---|
719 | register_format(&rt); |
---|
720 | } |
---|