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 <errno.h> |
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42 | #include <stddef.h> |
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43 | #include <stdio.h> |
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44 | #include <stdlib.h> |
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45 | #include <unistd.h> |
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46 | |
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47 | #include <rtems.h> |
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48 | #include <rtems/chain.h> |
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49 | |
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50 | #include <machine/rtems-bsd-commands.h> |
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51 | #include <machine/rtems-bsd-rc-conf.h> |
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52 | |
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53 | /* |
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54 | * cloned_interfaces |
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55 | * |
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56 | * eg cloned_interfaces="vlan0 bridge0 tap1 tap2" |
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57 | * |
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58 | * See 'man rc.conf(5)' on FreeBSD. |
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59 | */ |
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60 | static int |
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61 | cloned_interfaces(rtems_bsd_rc_conf* rc_conf, |
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62 | int argc, |
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63 | const char** argv) |
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64 | { |
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65 | int arg; |
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66 | for (arg = 1; arg < argc; ++arg) { |
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67 | const char* ifconfg_args[] = { |
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68 | "ifconfig", argv[arg], "create", NULL |
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69 | }; |
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70 | int r; |
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71 | rtems_bsd_rc_conf_print_cmd(rc_conf, "cloning_interfaces", 3, ifconfg_args); |
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72 | r = rtems_bsd_command_ifconfig(3, (char**) ifconfg_args); |
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73 | if (r != EX_OK) { |
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74 | errno = ECANCELED; |
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75 | return -1; |
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76 | } |
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77 | } |
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78 | return 0; |
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79 | } |
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80 | |
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81 | /* |
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82 | * create_args_'interface' |
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83 | * |
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84 | * eg create_args_myvlan="vlan 102" |
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85 | * |
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86 | * See 'man rc.conf(5)' on FreeBSD. |
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87 | */ |
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88 | typedef struct { |
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89 | rtems_chain_node node; |
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90 | const char* label; |
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91 | int argc; |
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92 | const char** argv; |
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93 | } create_args_item; |
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94 | |
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95 | static RTEMS_CHAIN_DEFINE_EMPTY(create_args_items); |
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96 | |
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97 | static int |
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98 | create_args_(rtems_bsd_rc_conf* rc_conf, |
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99 | int argc, |
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100 | const char** argv) |
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101 | { |
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102 | rtems_chain_node* node = rtems_chain_first(&create_args_items); |
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103 | const rtems_chain_node* tail = rtems_chain_tail(&create_args_items); |
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104 | const char* label = argv[0] + strlen("create_args_"); |
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105 | create_args_item* item; |
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106 | int arg; |
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107 | |
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108 | while (node != tail) { |
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109 | item = (create_args_item*) node; |
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110 | if (strcasecmp(item->label, label) == 0) { |
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111 | fprintf(stderr, "error: %s:%d: duplicate create args entry: %s\n", |
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112 | rtems_bsd_rc_conf_name(rc_conf), |
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113 | rtems_bsd_rc_conf_line(rc_conf), |
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114 | argv[0]); |
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115 | errno = EEXIST; |
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116 | return -1; |
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117 | } |
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118 | node = rtems_chain_next(node); |
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119 | } |
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120 | |
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121 | item = calloc(1, sizeof(*item)); |
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122 | if (item == NULL) { |
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123 | errno = ENOMEM; |
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124 | fprintf(stderr, "error: %s:%d: %s\n", |
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125 | rtems_bsd_rc_conf_name(rc_conf), |
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126 | rtems_bsd_rc_conf_line(rc_conf), |
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127 | strerror(errno)); |
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128 | return -1; |
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129 | } |
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130 | |
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131 | item->argc = argc; |
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132 | |
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133 | item->label = strdup(label); |
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134 | if (item->label == NULL) { |
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135 | free(item); |
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136 | errno = ENOMEM; |
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137 | fprintf(stderr, "error: %s:%d: %s\n", |
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138 | rtems_bsd_rc_conf_name(rc_conf), |
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139 | rtems_bsd_rc_conf_line(rc_conf), |
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140 | strerror(errno)); |
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141 | return -1; |
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142 | } |
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143 | |
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144 | item->argv = calloc(argc + 1, sizeof(char*)); |
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145 | if (item->argv == NULL) { |
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146 | free((void*) item->label); |
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147 | free(item); |
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148 | errno = ENOMEM; |
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149 | fprintf(stderr, "error: %s:%d: %s\n", |
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150 | rtems_bsd_rc_conf_name(rc_conf), |
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151 | rtems_bsd_rc_conf_line(rc_conf), |
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152 | strerror(errno)); |
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153 | return -1; |
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154 | } |
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155 | |
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156 | for (arg = 0; arg < argc; ++arg) { |
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157 | item->argv[arg] = strdup(argv[0]); |
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158 | if (item->argv[arg] == NULL) { |
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159 | int a; |
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160 | for (a = 0; a < arg; ++a) |
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161 | free((void*) item->argv[a]); |
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162 | free(item->argv); |
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163 | free((void*) item->label); |
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164 | free(item); |
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165 | errno = ENOMEM; |
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166 | fprintf(stderr, "error: %s:%d: %s\n", |
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167 | rtems_bsd_rc_conf_name(rc_conf), |
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168 | rtems_bsd_rc_conf_line(rc_conf), |
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169 | strerror(errno)); |
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170 | return -1; |
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171 | } |
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172 | } |
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173 | |
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174 | rtems_chain_append(&create_args_items, &item->node); |
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175 | |
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176 | return 0; |
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177 | } |
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178 | |
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179 | /* |
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180 | * ifconfig_'interface' |
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181 | * |
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182 | * eg ifconfig_em0="inet 10.10.5.33 netmask 255.255.255.0" |
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183 | * |
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184 | * See 'man rc.conf(5)' on FreeBSD. |
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185 | */ |
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186 | static int |
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187 | ifconfig_(rtems_bsd_rc_conf* rc_conf, |
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188 | int argc, |
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189 | const char** argv) |
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190 | { |
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191 | const char** args; |
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192 | int arg; |
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193 | int r; |
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194 | |
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195 | for (arg = 1; arg < argc; ++arg) { |
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196 | if (strcasecmp(argv[arg], "NOAUTO") == 0) |
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197 | return 0; |
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198 | } |
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199 | |
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200 | args = calloc(argc + 3, sizeof(char*)); |
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201 | if (args == NULL) { |
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202 | errno = ENOMEM; |
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203 | return -1; |
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204 | } |
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205 | |
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206 | args[0] = "ifconfig"; |
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207 | args[1] = argv[0] + strlen("ifconfig_"); |
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208 | |
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209 | for (arg = 1; arg < argc; ++arg) |
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210 | args[arg + 1] = argv[arg]; |
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211 | |
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212 | args[argc + 1] = "up"; |
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213 | |
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214 | rtems_bsd_rc_conf_print_cmd(rc_conf, "ifconfig", argc + 2, args); |
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215 | |
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216 | r = rtems_bsd_command_ifconfig(argc + 2, (char**) args); |
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217 | |
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218 | free(args); |
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219 | |
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220 | if (r != EX_OK) { |
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221 | errno = ECANCELED; |
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222 | return -1; |
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223 | } |
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224 | |
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225 | return 0; |
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226 | } |
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227 | |
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228 | /* |
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229 | * hostname |
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230 | * |
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231 | * eg hostname="myhost" |
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232 | * |
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233 | * See 'man rc.conf(5)' on FreeBSD. |
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234 | */ |
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235 | static int |
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236 | hostname(rtems_bsd_rc_conf* rc_conf, |
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237 | int argc, |
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238 | const char** argv) |
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239 | { |
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240 | if (argc > 2) { |
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241 | errno = EINVAL; |
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242 | return -1; |
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243 | } |
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244 | |
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245 | rtems_bsd_rc_conf_print_cmd(rc_conf, "hostname", argc, argv); |
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246 | |
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247 | return sethostname(argv[1], strlen(argv[1])); |
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248 | } |
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249 | |
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250 | /* |
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251 | * defaultrouter |
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252 | * |
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253 | * eg defaultrouter="1.2.3.4" |
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254 | * |
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255 | * See 'man rc.conf(5)' on FreeBSD. |
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256 | */ |
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257 | static int |
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258 | defaultrouter(rtems_bsd_rc_conf* rc_conf, |
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259 | int argc, |
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260 | const char** argv) |
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261 | { |
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262 | if (argc > 2) { |
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263 | errno = EINVAL; |
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264 | return -1; |
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265 | } |
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266 | |
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267 | if (strcasecmp(argv[1], "NO") != 0) { |
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268 | const char* args[] = { |
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269 | "route", "add", "default", argv[1], NULL |
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270 | }; |
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271 | int r; |
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272 | |
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273 | rtems_bsd_rc_conf_print_cmd(rc_conf, "defaultrouter", 4, args); |
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274 | |
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275 | r = rtems_bsd_command_route(4, (char**) args); |
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276 | if (r != EX_OK) { |
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277 | errno = ECANCELED; |
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278 | return -1; |
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279 | } |
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280 | } |
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281 | |
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282 | return 0; |
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283 | } |
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284 | |
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285 | static void |
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286 | add_directive(const char* name, rtems_bsd_rc_conf_directive handler) |
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287 | { |
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288 | int r; |
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289 | r = rtems_bsd_rc_conf_directive_add(name, handler); |
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290 | if (r < 0) |
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291 | fprintf(stderr, "error: cannot register rc.conf handler: %s\n", name); |
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292 | } |
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293 | |
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294 | void |
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295 | rc_conf_net_init(void* arg) |
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296 | { |
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297 | add_directive("cloned_interfaces", cloned_interfaces); |
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298 | add_directive("create_args_.*", create_args_); |
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299 | add_directive("ifconfig_.*", ifconfig_); |
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300 | add_directive("hostname", hostname); |
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301 | add_directive("defaultrouter", defaultrouter); |
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302 | } |
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