1 | #define _GNU_SOURCE |
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2 | |
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3 | #include "config.h" |
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4 | #include "common.h" |
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5 | #include "libtrace.h" |
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6 | #include "libtrace_int.h" |
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7 | #include "format_helper.h" |
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8 | #include "wandio.h" |
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9 | |
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10 | #include <sys/stat.h> |
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11 | #include <assert.h> |
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12 | #include <errno.h> |
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13 | #include <fcntl.h> |
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14 | #include <stdio.h> |
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15 | #include <string.h> |
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16 | #include <stdlib.h> |
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17 | |
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18 | |
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19 | |
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20 | #define DATA(x) ((struct atmhdr_format_data_t *)x->format_data) |
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21 | |
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22 | #define INPUT DATA(libtrace)->input |
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23 | |
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24 | struct atmhdr_format_data_t { |
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25 | union { |
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26 | int fd; |
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27 | io_t *file; |
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28 | } input; |
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29 | }; |
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30 | |
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31 | static int atmhdr_get_framing_length(const libtrace_packet_t *packet UNUSED) |
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32 | { |
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33 | return sizeof(atmhdr_t); |
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34 | } |
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35 | |
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36 | static int atmhdr_init_input(libtrace_t *libtrace) { |
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37 | libtrace->format_data = malloc(sizeof(struct atmhdr_format_data_t)); |
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38 | DATA(libtrace)->input.file = NULL; |
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39 | return 0; |
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40 | } |
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41 | |
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42 | static int atmhdr_start_input(libtrace_t *libtrace) |
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43 | { |
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44 | if (DATA(libtrace)->input.file) |
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45 | return 0; |
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46 | DATA(libtrace)->input.file = trace_open_file(libtrace); |
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47 | if (DATA(libtrace)->input.file) |
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48 | return 0; |
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49 | return -1; |
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50 | } |
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51 | |
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52 | static int atmhdr_fin_input(libtrace_t *libtrace) |
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53 | { |
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54 | wandio_destroy(INPUT.file); |
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55 | free(libtrace->format_data); |
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56 | return 0; |
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57 | } |
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58 | |
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59 | static int atmhdr_prepare_packet(libtrace_t *libtrace, |
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60 | libtrace_packet_t *packet, void *buffer, |
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61 | libtrace_rt_types_t rt_type, uint32_t flags) { |
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62 | |
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63 | if (packet->buffer != buffer && |
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64 | packet->buf_control == TRACE_CTRL_PACKET) { |
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65 | free(packet->buffer); |
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66 | } |
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67 | |
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68 | if ((flags & TRACE_PREP_OWN_BUFFER) == TRACE_PREP_OWN_BUFFER) { |
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69 | packet->buf_control = TRACE_CTRL_PACKET; |
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70 | } else |
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71 | packet->buf_control = TRACE_CTRL_EXTERNAL; |
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72 | |
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73 | packet->buffer = buffer; |
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74 | packet->header = buffer; |
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75 | packet->payload = (void*)((char*)packet->buffer + |
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76 | libtrace->format->get_framing_length(packet)); |
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77 | packet->type = rt_type; |
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78 | |
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79 | if (libtrace->format_data == NULL) { |
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80 | if (atmhdr_init_input(libtrace)) |
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81 | return -1; |
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82 | } |
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83 | return 0; |
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84 | } |
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85 | |
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86 | static int atmhdr_read_packet(libtrace_t *libtrace, libtrace_packet_t *packet) { |
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87 | int numbytes; |
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88 | void *buffer; |
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89 | uint32_t flags = 0; |
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90 | |
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91 | if (!packet->buffer || packet->buf_control == TRACE_CTRL_EXTERNAL) { |
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92 | packet->buffer=malloc((size_t)LIBTRACE_PACKET_BUFSIZE); |
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93 | } |
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94 | buffer = packet->buffer; |
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95 | flags |= TRACE_PREP_OWN_BUFFER; |
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96 | |
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97 | packet->type = TRACE_RT_DATA_ATMHDR; |
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98 | |
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99 | if ((numbytes=wandio_read(INPUT.file, buffer, (size_t)12)) != 12) |
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100 | { |
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101 | if (numbytes != 0) { |
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102 | trace_set_err(libtrace,errno,"read(%s)",libtrace->uridata); |
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103 | } |
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104 | return numbytes; |
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105 | } |
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106 | |
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107 | if (atmhdr_prepare_packet(libtrace, packet, buffer, |
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108 | TRACE_RT_DATA_ATMHDR, flags)) { |
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109 | return -1; |
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110 | } |
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111 | |
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112 | |
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113 | return 12; |
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114 | } |
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115 | |
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116 | static libtrace_linktype_t atmhdr_get_link_type(const libtrace_packet_t *packet UNUSED) { |
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117 | return TRACE_TYPE_ATM; |
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118 | } |
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119 | |
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120 | static int atmhdr_get_capture_length(const libtrace_packet_t *packet UNUSED) { |
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121 | return 4; |
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122 | } |
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123 | |
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124 | static int atmhdr_get_wire_length(const libtrace_packet_t *packet UNUSED) { |
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125 | return 53; |
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126 | } |
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127 | |
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128 | static uint64_t atmhdr_get_erf_timestamp(const libtrace_packet_t *packet) { |
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129 | uint64_t ts; |
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130 | atmhdr_t *atm = (atmhdr_t *)packet->header; |
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131 | ts = (uint64_t)atm->ts_fraction + ((uint64_t)atm->ts_sec << 32); |
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132 | |
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133 | return ts; |
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134 | } |
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135 | |
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136 | static struct libtrace_format_t atmhdr = { |
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137 | "atmhdr", |
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138 | "$Id$", |
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139 | TRACE_FORMAT_ATMHDR, |
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140 | atmhdr_init_input, /* init_input */ |
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141 | NULL, /* config_input */ |
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142 | atmhdr_start_input, /* start_input */ |
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143 | NULL, /* pause_input */ |
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144 | NULL, /* init_output */ |
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145 | NULL, /* config_output */ |
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146 | NULL, /* start_output */ |
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147 | atmhdr_fin_input, /* fin_input */ |
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148 | NULL, /* fin_output */ |
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149 | atmhdr_read_packet, /* read_packet */ |
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150 | atmhdr_prepare_packet, /* prepare_packet */ |
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151 | NULL, /* fin_packet */ |
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152 | NULL, /* write_packet */ |
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153 | atmhdr_get_link_type, /* get_link_type */ |
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154 | NULL, /* get_direction */ |
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155 | NULL, /* set_direction */ |
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156 | atmhdr_get_erf_timestamp, /* get_erf_timestamp */ |
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157 | NULL, /* get_timeval */ |
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158 | NULL, /* get_seconds */ |
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159 | NULL, /* seek_erf */ |
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160 | NULL, /* seek_timeval */ |
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161 | NULL, /* seek_seconds */ |
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162 | atmhdr_get_capture_length, /* get_capture_length */ |
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163 | atmhdr_get_wire_length, /* get_wire_length */ |
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164 | atmhdr_get_framing_length, /* get_framing_length */ |
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165 | NULL, /* set_capture_length */ |
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166 | NULL, /* get_received_packets */ |
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167 | NULL, /* get_filtered_packets */ |
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168 | NULL, /* get_dropped_packets */ |
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169 | NULL, /* get_captured_packets */ |
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170 | NULL, /* get_fd */ |
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171 | trace_event_trace, /* trace_event */ |
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172 | NULL, /* help */ |
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173 | NULL /* next pointer */ |
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174 | }; |
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175 | |
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176 | |
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177 | void atmhdr_constructor(void) { |
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178 | register_format(&atmhdr); |
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179 | } |
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