1 | /* |
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2 | * Copyright (c) 2016 Chris Johns <chrisj@rtems.org>. All rights reserved. |
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3 | * |
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4 | * Redistribution and use in source and binary forms, with or without |
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5 | * modification, are permitted provided that the following conditions |
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6 | * are met: |
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7 | * 1. Redistributions of source code must retain the above copyright |
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8 | * notice, this list of conditions and the following disclaimer. |
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9 | * 2. Redistributions in binary form must reproduce the above copyright |
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10 | * notice, this list of conditions and the following disclaimer in the |
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11 | * documentation and/or other materials provided with the distribution. |
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12 | * |
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13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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14 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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16 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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17 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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18 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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19 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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20 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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21 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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22 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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23 | * SUCH DAMAGE. |
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24 | */ |
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25 | |
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26 | /* |
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27 | * Handle the networking directives found in rc.conf. |
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28 | * - ifconfig_* |
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29 | * - cloned_interfaces |
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30 | * - autobridge_interfaces |
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31 | * - autobridge_bridge* |
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32 | * - defaultrouter |
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33 | */ |
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34 | |
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35 | #include <rtems/bsd/sys/param.h> |
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36 | #include <sys/types.h> |
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37 | #include <sys/queue.h> |
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38 | #include <sys/kernel.h> |
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39 | #include <sysexits.h> |
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40 | |
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41 | #include <ifaddrs.h> |
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42 | |
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43 | #include <errno.h> |
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44 | #include <stddef.h> |
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45 | #include <stdio.h> |
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46 | #include <stdlib.h> |
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47 | #include <unistd.h> |
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48 | |
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49 | #include <rtems.h> |
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50 | #include <rtems/chain.h> |
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51 | |
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52 | #include <machine/rtems-bsd-commands.h> |
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53 | #include <machine/rtems-bsd-rc-conf-services.h> |
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54 | |
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55 | /* |
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56 | * Default defaultroute_delay is 30seconds. |
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57 | */ |
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58 | static int defaultroute_delay_secs = 30; |
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59 | |
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60 | /* |
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61 | * Show a result. |
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62 | */ |
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63 | static void |
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64 | show_result(const char* label, int r) |
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65 | { |
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66 | if (r < 0) |
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67 | fprintf(stderr, "error: %s: %s\n", label, strerror(errno)); |
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68 | } |
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69 | |
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70 | /* |
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71 | * cloned_interfaces |
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72 | * |
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73 | * eg cloned_interfaces="vlan0 bridge0 tap1 tap2" |
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74 | * |
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75 | * See 'man rc.conf(5)' on FreeBSD. |
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76 | */ |
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77 | static int |
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78 | cloned_interfaces(rtems_bsd_rc_conf* rc_conf, rtems_bsd_rc_conf_argc_argv* aa) |
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79 | { |
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80 | int arg; |
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81 | int r = 0; |
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82 | |
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83 | r = rtems_bsd_rc_conf_find(rc_conf, "cloned_interfaces", aa); |
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84 | if (r < 0) { |
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85 | if (errno == ENOENT) |
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86 | r = 0; |
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87 | return r; |
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88 | } |
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89 | |
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90 | for (arg = 1; arg < aa->argc; ++arg) { |
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91 | const char* ifconfg_args[] = { |
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92 | "ifconfig", aa->argv[arg], "create", NULL |
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93 | }; |
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94 | rtems_bsd_rc_conf_print_cmd(rc_conf, "cloning_interfaces", 3, ifconfg_args); |
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95 | rtems_bsd_command_ifconfig(3, (char**) ifconfg_args); |
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96 | } |
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97 | |
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98 | return 0; |
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99 | } |
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100 | |
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101 | /* |
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102 | * create_args_'interface' |
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103 | * |
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104 | * eg create_args_myvlan="vlan 102" |
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105 | * |
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106 | * See 'man rc.conf(5)' on FreeBSD. |
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107 | */ |
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108 | typedef struct { |
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109 | rtems_chain_node node; |
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110 | const char* label; |
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111 | int argc; |
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112 | const char** argv; |
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113 | } create_args_item; |
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114 | |
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115 | static RTEMS_CHAIN_DEFINE_EMPTY(create_args_items); |
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116 | |
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117 | static int |
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118 | load_create_args(rtems_bsd_rc_conf* rc_conf, rtems_bsd_rc_conf_argc_argv* aa) |
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119 | { |
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120 | int r = 0; |
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121 | |
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122 | r = rtems_bsd_rc_conf_find(rc_conf, "create_args_.*", aa); |
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123 | |
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124 | while (r == 0) { |
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125 | rtems_chain_node* node; |
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126 | const char* label; |
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127 | create_args_item* item; |
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128 | int arg; |
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129 | |
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130 | rtems_bsd_rc_conf_print_cmd(rc_conf, "create_args_", aa->argc, aa->argv); |
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131 | |
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132 | label = aa->argv[0] + strlen("create_args_"); |
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133 | |
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134 | node = rtems_chain_first(&create_args_items); |
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135 | |
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136 | while (!rtems_chain_is_tail(&create_args_items, node)) { |
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137 | item = (create_args_item*) node; |
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138 | if (strcasecmp(item->label, label) == 0) { |
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139 | fprintf(stderr, "error: %s:%d: duplicate create args entry: %s\n", |
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140 | rtems_bsd_rc_conf_name(rc_conf), |
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141 | rtems_bsd_rc_conf_line(rc_conf), |
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142 | aa->argv[0]); |
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143 | errno = EEXIST; |
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144 | return -1; |
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145 | } |
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146 | node = rtems_chain_next(node); |
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147 | } |
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148 | |
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149 | item = calloc(1, sizeof(*item)); |
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150 | if (item == NULL) { |
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151 | errno = ENOMEM; |
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152 | fprintf(stderr, "error: %s:%d: %s\n", |
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153 | rtems_bsd_rc_conf_name(rc_conf), |
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154 | rtems_bsd_rc_conf_line(rc_conf), |
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155 | strerror(errno)); |
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156 | return -1; |
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157 | } |
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158 | |
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159 | item->argc = aa->argc; |
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160 | |
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161 | item->label = strdup(label); |
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162 | if (item->label == NULL) { |
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163 | free(item); |
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164 | errno = ENOMEM; |
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165 | fprintf(stderr, "error: %s:%d: %s\n", |
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166 | rtems_bsd_rc_conf_name(rc_conf), |
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167 | rtems_bsd_rc_conf_line(rc_conf), |
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168 | strerror(errno)); |
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169 | return -1; |
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170 | } |
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171 | |
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172 | item->argv = calloc(aa->argc + 1, sizeof(char*)); |
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173 | if (item->argv == NULL) { |
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174 | free((void*) item->label); |
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175 | free(item); |
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176 | errno = ENOMEM; |
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177 | fprintf(stderr, "error: %s:%d: %s\n", |
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178 | rtems_bsd_rc_conf_name(rc_conf), |
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179 | rtems_bsd_rc_conf_line(rc_conf), |
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180 | strerror(errno)); |
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181 | return -1; |
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182 | } |
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183 | |
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184 | for (arg = 0; arg < aa->argc; ++arg) { |
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185 | item->argv[arg] = strdup(aa->argv[0]); |
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186 | if (item->argv[arg] == NULL) { |
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187 | int a; |
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188 | for (a = 0; a < arg; ++a) |
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189 | free((void*) item->argv[a]); |
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190 | free(item->argv); |
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191 | free((void*) item->label); |
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192 | free(item); |
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193 | errno = ENOMEM; |
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194 | fprintf(stderr, "error: %s:%d: %s\n", |
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195 | rtems_bsd_rc_conf_name(rc_conf), |
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196 | rtems_bsd_rc_conf_line(rc_conf), |
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197 | strerror(errno)); |
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198 | return -1; |
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199 | } |
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200 | } |
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201 | |
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202 | rtems_chain_append(&create_args_items, &item->node); |
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203 | |
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204 | r = rtems_bsd_rc_conf_find_next(rc_conf, aa); |
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205 | } |
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206 | |
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207 | /* |
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208 | * ignore not found. |
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209 | */ |
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210 | if (r < 0 && errno == ENOENT) |
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211 | r = 0; |
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212 | |
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213 | return 0; |
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214 | } |
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215 | |
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216 | /* |
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217 | * ifconfig_'interface' |
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218 | * |
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219 | * eg ifconfig_em0="inet 10.10.5.33 netmask 255.255.255.0" |
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220 | * |
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221 | * See 'man rc.conf(5)' on FreeBSD. |
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222 | */ |
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223 | static int |
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224 | ifconfig_(rtems_bsd_rc_conf* rc_conf, |
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225 | const char* ifname, |
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226 | int argc, |
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227 | const char** argv) |
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228 | { |
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229 | const char** args; |
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230 | int arg; |
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231 | int r; |
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232 | const char const* ifconfig_show[] = { "ifconfig", ifname, NULL }; |
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233 | |
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234 | for (arg = 1; arg < argc; ++arg) { |
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235 | if (strcasecmp(argv[arg], "NOAUTO") == 0) |
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236 | return 0; |
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237 | } |
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238 | |
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239 | args = calloc(argc + 3, sizeof(char*)); |
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240 | if (args == NULL) { |
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241 | errno = ENOMEM; |
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242 | return -1; |
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243 | } |
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244 | |
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245 | args[0] = "ifconfig"; |
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246 | args[1] = ifname; |
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247 | |
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248 | for (arg = 1; arg < argc; ++arg) |
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249 | args[arg + 1] = argv[arg]; |
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250 | |
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251 | args[argc + 1] = "up"; |
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252 | |
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253 | rtems_bsd_rc_conf_print_cmd(rc_conf, "ifconfig", argc + 2, args); |
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254 | |
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255 | r = rtems_bsd_command_ifconfig(argc + 2, (char**) args); |
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256 | |
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257 | free(args); |
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258 | |
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259 | if (r != EX_OK) { |
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260 | errno = ECANCELED; |
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261 | return -1; |
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262 | } |
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263 | |
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264 | r = rtems_bsd_command_ifconfig(2, (char**) ifconfig_show); |
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265 | |
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266 | return r; |
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267 | } |
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268 | |
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269 | /* |
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270 | * hostname |
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271 | * |
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272 | * eg hostname="myhost" |
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273 | * |
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274 | * See 'man rc.conf(5)' on FreeBSD. |
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275 | */ |
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276 | static int |
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277 | hostname(rtems_bsd_rc_conf* rc_conf, rtems_bsd_rc_conf_argc_argv* aa) |
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278 | { |
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279 | const char** argv; |
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280 | int r; |
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281 | const char const* default_argv[] = { "hostname", "Amnesiac", NULL }; |
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282 | |
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283 | r = rtems_bsd_rc_conf_find(rc_conf, "hostname", aa); |
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284 | if (r < 0 && errno != ENOENT) |
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285 | return -1; |
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286 | |
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287 | if (r < 0 || (r == 0 && aa->argc != 2)) { |
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288 | argv = default_argv; |
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289 | } |
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290 | else { |
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291 | argv = aa->argv; |
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292 | } |
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293 | |
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294 | fprintf(stdout, "Setting hostname: %s.\n", argv[1]); |
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295 | |
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296 | return sethostname(argv[1], strlen(argv[1])); |
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297 | } |
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298 | |
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299 | /* |
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300 | * defaultrouter |
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301 | * |
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302 | * eg defaultrouter="1.2.3.4" |
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303 | * |
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304 | * See 'man rc.conf(5)' on FreeBSD. |
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305 | */ |
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306 | static int |
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307 | defaultrouter(rtems_bsd_rc_conf* rc_conf, rtems_bsd_rc_conf_argc_argv* aa) |
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308 | { |
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309 | int r; |
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310 | |
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311 | r = rtems_bsd_rc_conf_find(rc_conf, "defaultrouter", aa); |
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312 | if (r < 0 && errno != ENOENT) |
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313 | return -1; |
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314 | |
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315 | if (r == 0) { |
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316 | if (aa->argc > 2) { |
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317 | errno = EINVAL; |
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318 | return -1; |
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319 | } |
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320 | |
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321 | if (strcasecmp(aa->argv[1], "NO") != 0) { |
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322 | const char* args[] = { "route", "add", "default", aa->argv[1], NULL }; |
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323 | int r; |
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324 | |
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325 | rtems_bsd_rc_conf_print_cmd(rc_conf, "defaultrouter", 4, args); |
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326 | |
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327 | r = rtems_bsd_command_route(4, (char**) args); |
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328 | if (r != EX_OK) { |
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329 | errno = ECANCELED; |
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330 | return -1; |
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331 | } |
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332 | } |
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333 | } |
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334 | |
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335 | return 0; |
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336 | } |
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337 | |
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338 | /* |
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339 | * defaultroute_delay |
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340 | * |
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341 | * eg defaultroute=120 |
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342 | * |
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343 | * See 'man rc.conf(5)' on FreeBSD. |
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344 | */ |
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345 | static int |
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346 | defaultroute_delay(rtems_bsd_rc_conf* rc_conf, |
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347 | int argc, |
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348 | const char** argv) |
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349 | { |
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350 | int value; |
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351 | char* end = NULL; |
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352 | |
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353 | if (argc != 2) { |
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354 | errno = EINVAL; |
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355 | return -1; |
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356 | } |
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357 | |
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358 | value = strtol(argv[1], &end, 10); |
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359 | |
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360 | if (end == NULL) { |
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361 | const char* args[] = { |
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362 | "defaultrouter_delay", argv[1], NULL |
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363 | }; |
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364 | |
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365 | rtems_bsd_rc_conf_print_cmd(rc_conf, "defaultrouter", 2, args); |
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366 | |
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367 | defaultroute_delay_secs = value; |
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368 | } |
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369 | else { |
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370 | errno = EINVAL; |
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371 | return -1; |
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372 | } |
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373 | |
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374 | return 0; |
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375 | } |
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376 | |
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377 | static int |
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378 | show_interfaces(const char* msg, struct ifaddrs* ifap) |
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379 | { |
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380 | struct ifaddrs* ifa; |
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381 | |
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382 | fprintf(stdout, msg); |
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383 | |
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384 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
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385 | if (strcasecmp("lo0", ifa->ifa_name) == 0) { |
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386 | fprintf(stdout, "%s ", ifa->ifa_name); |
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387 | break; |
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388 | } |
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389 | } |
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390 | |
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391 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
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392 | if (strcasecmp("lo0", ifa->ifa_name) != 0) { |
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393 | fprintf(stdout, "%s ", ifa->ifa_name); |
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394 | } |
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395 | } |
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396 | |
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397 | fprintf(stdout, "\b.\n"); |
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398 | |
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399 | return 0; |
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400 | } |
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401 | |
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402 | static int |
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403 | setup_lo0(rtems_bsd_rc_conf* rc_conf, struct ifaddrs* ifap) |
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404 | { |
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405 | struct ifaddrs* ifa; |
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406 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
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407 | if (strcasecmp("lo0", ifa->ifa_name) == 0) { |
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408 | const char* lo0_argv[] = { |
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409 | "ifconfig_lo0", "inet", "127.0.0.1", "netmask", "255.0.0.0", NULL |
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410 | }; |
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411 | show_result("lo0", ifconfig_(rc_conf, "lo0", 5, lo0_argv)); |
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412 | return 0; |
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413 | } |
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414 | } |
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415 | fprintf(stderr, "warning: no loopback interface found\n"); |
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416 | return -1; |
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417 | } |
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418 | |
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419 | static int |
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420 | setup_interfaces(rtems_bsd_rc_conf* rc_conf, |
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421 | rtems_bsd_rc_conf_argc_argv* aa, |
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422 | struct ifaddrs* ifap) |
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423 | { |
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424 | struct ifaddrs* ifa; |
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425 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
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426 | if (strcasecmp("lo0", ifa->ifa_name) != 0) { |
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427 | char iface[64]; |
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428 | int r; |
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429 | snprintf(iface, sizeof(iface), "ifconfig_%s", ifa->ifa_name); |
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430 | r = rtems_bsd_rc_conf_find(rc_conf, iface, aa); |
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431 | if (r == 0) { |
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432 | show_result(iface, ifconfig_(rc_conf, ifa->ifa_name, aa->argc, aa->argv)); |
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433 | } |
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434 | } |
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435 | } |
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436 | return 0; |
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437 | } |
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438 | |
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439 | static int |
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440 | setup_vlans(rtems_bsd_rc_conf* rc_conf, |
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441 | rtems_bsd_rc_conf_argc_argv* aa, |
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442 | struct ifaddrs* ifap) |
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443 | { |
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444 | rtems_bsd_rc_conf_argc_argv* vaa; |
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445 | struct ifaddrs* ifa; |
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446 | |
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447 | vaa = rtems_bsd_rc_conf_argc_argv_create(); |
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448 | if (vaa == NULL) |
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449 | return -1; |
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450 | |
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451 | show_result("create_args", load_create_args(rc_conf, aa)); |
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452 | |
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453 | for (ifa = ifap; ifa; ifa = ifa->ifa_next) { |
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454 | if (strcasecmp("lo0", ifa->ifa_name) != 0) { |
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455 | char expr[128]; |
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456 | int r; |
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457 | /* |
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458 | * Look for vlans_'iface'="101 102 103" |
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459 | */ |
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460 | snprintf(expr, sizeof(expr), "vlans_%s", ifa->ifa_name); |
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461 | r = rtems_bsd_rc_conf_find(rc_conf, expr, aa); |
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462 | if (r == 0) { |
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463 | int arg; |
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464 | for (arg = 1; arg < aa->argc; ++arg) { |
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465 | char vlan_name[64]; |
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466 | const char* vlan_create[] = { |
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467 | "ifconfig", vlan_name, "create", NULL |
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468 | }; |
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469 | /* |
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470 | * Create the VLAN name as 'iface'.'vlan'. |
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471 | */ |
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472 | snprintf(vlan_name, sizeof(vlan_name), |
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473 | "%s.%s", ifa->ifa_name, aa->argv[arg]); |
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474 | rtems_bsd_rc_conf_print_cmd(rc_conf, "vlan", 3, vlan_create); |
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475 | r = rtems_bsd_command_ifconfig(3, (char**) vlan_create); |
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476 | if (r == 0) { |
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477 | /* |
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478 | * Look for ifconfig_'iface'_'vlan'="..." |
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479 | */ |
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480 | snprintf(expr, sizeof(expr), |
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481 | "ifconfig_%s_%s", ifa->ifa_name, aa->argv[arg]); |
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482 | r = rtems_bsd_rc_conf_find(rc_conf, expr, vaa); |
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483 | if (r == 0) { |
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484 | show_result(vlan_name, ifconfig_(rc_conf, vlan_name, |
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485 | vaa->argc, vaa->argv)); |
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486 | } |
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487 | } |
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488 | } |
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489 | } |
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490 | } |
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491 | } |
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492 | |
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493 | rtems_bsd_rc_conf_argc_argv_destroy(vaa); |
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494 | |
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495 | return 0; |
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496 | } |
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497 | |
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498 | static int |
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499 | interfaces(rtems_bsd_rc_conf* rc_conf, rtems_bsd_rc_conf_argc_argv* aa) |
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500 | { |
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501 | struct ifaddrs* ifap; |
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502 | |
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503 | if (getifaddrs(&ifap) != 0) { |
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504 | fprintf(stderr, "error: interfaces: getifaddrs: %s\n", strerror(errno)); |
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505 | return -1; |
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506 | } |
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507 | |
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508 | show_interfaces("Starting network: ", ifap); |
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509 | show_result("cloned_interfaces", cloned_interfaces(rc_conf, aa)); |
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510 | show_result("lo0", setup_lo0(rc_conf, ifap)); |
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511 | show_result("ifaces", setup_interfaces(rc_conf, aa, ifap)); |
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512 | show_result("vlans", setup_vlans(rc_conf, aa, ifap)); |
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513 | |
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514 | free(ifap); |
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515 | |
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516 | return 0; |
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517 | } |
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518 | |
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519 | static int |
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520 | network_service(rtems_bsd_rc_conf* rc_conf) |
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521 | { |
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522 | rtems_bsd_rc_conf_argc_argv* aa; |
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523 | int r; |
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524 | |
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525 | aa = rtems_bsd_rc_conf_argc_argv_create(); |
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526 | if (aa == NULL) |
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527 | return -1; |
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528 | |
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529 | show_result("hostname", hostname(rc_conf, aa)); |
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530 | |
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531 | r = interfaces(rc_conf, aa); |
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532 | if (r < 0) { |
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533 | rtems_bsd_rc_conf_argc_argv_destroy(aa); |
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534 | return -1; |
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535 | } |
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536 | |
---|
537 | show_result("defaultrouter", defaultrouter(rc_conf, aa)); |
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538 | |
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539 | rtems_bsd_rc_conf_argc_argv_destroy(aa); |
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540 | |
---|
541 | return 0; |
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542 | } |
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543 | |
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544 | void |
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545 | rc_conf_net_init(void* arg) |
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546 | { |
---|
547 | int r; |
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548 | r = rtems_bsd_rc_conf_service_add("network", |
---|
549 | "after:first;", |
---|
550 | network_service); |
---|
551 | if (r < 0) |
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552 | fprintf(stderr, "error: network service add failed: %s\n", strerror(errno)); |
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553 | } |
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