1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * This program is free software; you can redistribute it and/or
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4 | * modify it under the terms of the GNU General Public License
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5 | * as published by the Free Software Foundation; either version
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6 | * 2 of the License, or (at your option) any later version.
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7 | *
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8 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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9 | */
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10 | #include "libbb.h"
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11 | #include "rt_names.h"
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12 |
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13 | #define CONFDIR CONFIG_FEATURE_IP_ROUTE_DIR
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14 |
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15 | typedef struct rtnl_tab_t {
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16 | const char *cached_str;
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17 | unsigned cached_result;
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18 | /* upstream version switched to a hash table and removed
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19 | * id < 256 limit. For now bbox bumps this array size from 256
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20 | * to 1024. If you plan to change this to a hash table,
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21 | * consider merging several hash tables we have (for example,
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22 | * awk has resizable one!
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23 | */
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24 | #define RT_TABLE_MAX 1023
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25 | const char *tab[RT_TABLE_MAX+1];
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26 | } rtnl_tab_t;
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27 |
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28 | static void rtnl_tab_initialize(const char *file, const char **tab)
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29 | {
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30 | char *token[2];
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31 | char fullname[sizeof(CONFDIR"/rt_dsfield") + 8];
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32 | parser_t *parser;
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33 |
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34 | sprintf(fullname, CONFDIR"/rt_%s", file);
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35 | parser = config_open2(fullname, fopen_for_read);
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36 | while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL)) {
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37 | unsigned id = bb_strtou(token[0], NULL, 0);
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38 | if (id > RT_TABLE_MAX) {
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39 | bb_error_msg("database %s is corrupted at line %d",
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40 | file, parser->lineno);
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41 | break;
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42 | }
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43 | tab[id] = xstrdup(token[1]);
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44 | }
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45 | config_close(parser);
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46 | }
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47 |
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48 | static int rtnl_a2n(rtnl_tab_t *tab, uint32_t *id, const char *arg, int base)
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49 | {
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50 | unsigned i;
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51 |
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52 | if (tab->cached_str && strcmp(tab->cached_str, arg) == 0) {
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53 | *id = tab->cached_result;
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54 | return 0;
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55 | }
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56 |
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57 | for (i = 0; i <= RT_TABLE_MAX; i++) {
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58 | if (tab->tab[i]
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59 | && strcmp(tab->tab[i], arg) == 0
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60 | ) {
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61 | tab->cached_str = tab->tab[i];
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62 | tab->cached_result = i;
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63 | *id = i;
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64 | return 0;
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65 | }
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66 | }
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67 |
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68 | i = bb_strtou(arg, NULL, base);
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69 | if (i > RT_TABLE_MAX)
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70 | return -1;
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71 | *id = i;
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72 | return 0;
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73 | }
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74 |
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75 |
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76 | static rtnl_tab_t *rtnl_rtprot_tab;
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77 |
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78 | static void rtnl_rtprot_initialize(void)
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79 | {
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80 | static const char *const init_tab[] = {
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81 | "none",
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82 | "redirect",
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83 | "kernel",
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84 | "boot",
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85 | "static",
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86 | NULL,
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87 | NULL,
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88 | NULL,
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89 | "gated",
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90 | "ra",
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91 | "mrt",
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92 | "zebra",
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93 | "bird",
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94 | };
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95 |
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96 | if (rtnl_rtprot_tab)
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97 | return;
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98 | rtnl_rtprot_tab = xzalloc(sizeof(*rtnl_rtprot_tab));
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99 | memcpy(rtnl_rtprot_tab->tab, init_tab, sizeof(init_tab));
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100 | rtnl_tab_initialize("protos", rtnl_rtprot_tab->tab);
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101 | }
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102 |
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103 | #if 0 /* UNUSED */
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104 | const char* FAST_FUNC rtnl_rtprot_n2a(int id)
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105 | {
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106 | if (id < 0 || id > RT_TABLE_MAX) {
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107 | return itoa(id);
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108 | }
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109 |
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110 | rtnl_rtprot_initialize();
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111 |
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112 | if (rtnl_rtprot_tab->tab[id])
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113 | return rtnl_rtprot_tab->tab[id];
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114 | return itoa(id);
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115 | }
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116 | #endif
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117 |
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118 | int FAST_FUNC rtnl_rtprot_a2n(uint32_t *id, char *arg)
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119 | {
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120 | rtnl_rtprot_initialize();
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121 | return rtnl_a2n(rtnl_rtprot_tab, id, arg, 0);
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122 | }
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123 |
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124 |
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125 | static rtnl_tab_t *rtnl_rtscope_tab;
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126 |
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127 | static void rtnl_rtscope_initialize(void)
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128 | {
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129 | if (rtnl_rtscope_tab)
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130 | return;
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131 | rtnl_rtscope_tab = xzalloc(sizeof(*rtnl_rtscope_tab));
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132 | rtnl_rtscope_tab->tab[0] = "global";
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133 | rtnl_rtscope_tab->tab[255] = "nowhere";
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134 | rtnl_rtscope_tab->tab[254] = "host";
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135 | rtnl_rtscope_tab->tab[253] = "link";
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136 | rtnl_rtscope_tab->tab[200] = "site";
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137 | rtnl_tab_initialize("scopes", rtnl_rtscope_tab->tab);
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138 | }
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139 |
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140 | const char* FAST_FUNC rtnl_rtscope_n2a(int id)
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141 | {
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142 | if (id < 0 || id > RT_TABLE_MAX) {
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143 | return itoa(id);
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144 | }
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145 |
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146 | rtnl_rtscope_initialize();
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147 |
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148 | if (rtnl_rtscope_tab->tab[id])
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149 | return rtnl_rtscope_tab->tab[id];
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150 | return itoa(id);
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151 | }
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152 |
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153 | int FAST_FUNC rtnl_rtscope_a2n(uint32_t *id, char *arg)
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154 | {
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155 | rtnl_rtscope_initialize();
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156 | return rtnl_a2n(rtnl_rtscope_tab, id, arg, 0);
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157 | }
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158 |
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159 |
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160 | static rtnl_tab_t *rtnl_rtrealm_tab;
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161 |
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162 | static void rtnl_rtrealm_initialize(void)
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163 | {
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164 | if (rtnl_rtrealm_tab) return;
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165 | rtnl_rtrealm_tab = xzalloc(sizeof(*rtnl_rtrealm_tab));
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166 | rtnl_rtrealm_tab->tab[0] = "unknown";
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167 | rtnl_tab_initialize("realms", rtnl_rtrealm_tab->tab);
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168 | }
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169 |
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170 | int FAST_FUNC rtnl_rtrealm_a2n(uint32_t *id, char *arg)
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171 | {
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172 | rtnl_rtrealm_initialize();
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173 | return rtnl_a2n(rtnl_rtrealm_tab, id, arg, 0);
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174 | }
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175 |
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176 | #if ENABLE_FEATURE_IP_RULE
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177 | const char* FAST_FUNC rtnl_rtrealm_n2a(int id)
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178 | {
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179 | if (id < 0 || id > RT_TABLE_MAX) {
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180 | return itoa(id);
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181 | }
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182 |
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183 | rtnl_rtrealm_initialize();
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184 |
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185 | if (rtnl_rtrealm_tab->tab[id])
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186 | return rtnl_rtrealm_tab->tab[id];
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187 | return itoa(id);
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188 | }
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189 | #endif
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190 |
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191 |
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192 | static rtnl_tab_t *rtnl_rtdsfield_tab;
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193 |
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194 | static void rtnl_rtdsfield_initialize(void)
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195 | {
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196 | if (rtnl_rtdsfield_tab) return;
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197 | rtnl_rtdsfield_tab = xzalloc(sizeof(*rtnl_rtdsfield_tab));
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198 | rtnl_rtdsfield_tab->tab[0] = "0";
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199 | rtnl_tab_initialize("dsfield", rtnl_rtdsfield_tab->tab);
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200 | }
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201 |
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202 | const char* FAST_FUNC rtnl_dsfield_n2a(int id)
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203 | {
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204 | if (id < 0 || id > RT_TABLE_MAX) {
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205 | return itoa(id);
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206 | }
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207 |
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208 | rtnl_rtdsfield_initialize();
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209 |
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210 | if (rtnl_rtdsfield_tab->tab[id])
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211 | return rtnl_rtdsfield_tab->tab[id];
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212 | return itoa(id);
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213 | }
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214 |
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215 | int FAST_FUNC rtnl_dsfield_a2n(uint32_t *id, char *arg)
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216 | {
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217 | rtnl_rtdsfield_initialize();
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218 | return rtnl_a2n(rtnl_rtdsfield_tab, id, arg, 16);
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219 | }
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220 |
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221 |
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222 | #if ENABLE_FEATURE_IP_RULE
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223 | static rtnl_tab_t *rtnl_rttable_tab;
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224 |
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225 | static void rtnl_rttable_initialize(void)
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226 | {
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227 | if (rtnl_rttable_tab)
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228 | return;
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229 |
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230 | rtnl_rttable_tab = xzalloc(sizeof(*rtnl_rttable_tab));
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231 | rtnl_rttable_tab->tab[0] = "unspec";
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232 | rtnl_rttable_tab->tab[255] = "local";
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233 | rtnl_rttable_tab->tab[254] = "main";
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234 | rtnl_rttable_tab->tab[253] = "default";
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235 | rtnl_tab_initialize("tables", rtnl_rttable_tab->tab);
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236 | }
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237 |
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238 | const char* FAST_FUNC rtnl_rttable_n2a(int id)
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239 | {
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240 | if (id < 0 || id > RT_TABLE_MAX) {
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241 | return itoa(id);
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242 | }
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243 |
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244 | rtnl_rttable_initialize();
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245 |
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246 | if (rtnl_rttable_tab->tab[id])
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247 | return rtnl_rttable_tab->tab[id];
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248 | return itoa(id);
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249 | }
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250 |
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251 | int FAST_FUNC rtnl_rttable_a2n(uint32_t *id, char *arg)
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252 | {
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253 | rtnl_rttable_initialize();
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254 | return rtnl_a2n(rtnl_rttable_tab, id, arg, 0);
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255 | }
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256 |
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257 | #endif
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