1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * rt_names.c rtnetlink names DB.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version
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8 | * 2 of the License, or (at your option) any later version.
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9 | *
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10 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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11 | */
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12 |
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13 | #include "libbb.h"
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14 | #include "rt_names.h"
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15 |
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16 | static void rtnl_tab_initialize(const char *file, const char **tab, int size)
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17 | {
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18 | char buf[512];
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19 | FILE *fp;
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20 |
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21 | fp = fopen(file, "r");
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22 | if (!fp)
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23 | return;
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24 | while (fgets(buf, sizeof(buf), fp)) {
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25 | char *p = buf;
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26 | int id;
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27 | char namebuf[512];
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28 |
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29 | while (*p == ' ' || *p == '\t')
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30 | p++;
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31 | if (*p == '#' || *p == '\n' || *p == 0)
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32 | continue;
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33 | if (sscanf(p, "0x%x %s\n", &id, namebuf) != 2
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34 | && sscanf(p, "0x%x %s #", &id, namebuf) != 2
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35 | && sscanf(p, "%d %s\n", &id, namebuf) != 2
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36 | && sscanf(p, "%d %s #", &id, namebuf) != 2
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37 | ) {
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38 | bb_error_msg("database %s is corrupted at %s",
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39 | file, p);
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40 | return;
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41 | }
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42 |
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43 | if (id < 0 || id > size)
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44 | continue;
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45 |
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46 | tab[id] = xstrdup(namebuf);
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47 | }
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48 | fclose(fp);
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49 | }
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50 |
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51 |
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52 | static const char **rtnl_rtprot_tab; /* [256] */
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53 |
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54 | static void rtnl_rtprot_initialize(void)
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55 | {
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56 | static const char *const init_tab[] = {
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57 | "none",
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58 | "redirect",
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59 | "kernel",
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60 | "boot",
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61 | "static",
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62 | NULL,
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63 | NULL,
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64 | NULL,
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65 | "gated",
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66 | "ra",
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67 | "mrt",
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68 | "zebra",
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69 | "bird",
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70 | };
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71 | if (rtnl_rtprot_tab) return;
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72 | rtnl_rtprot_tab = xzalloc(256 * sizeof(rtnl_rtprot_tab[0]));
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73 | memcpy(rtnl_rtprot_tab, init_tab, sizeof(init_tab));
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74 | rtnl_tab_initialize("/etc/iproute2/rt_protos",
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75 | rtnl_rtprot_tab, 256);
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76 | }
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77 |
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78 |
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79 | const char* rtnl_rtprot_n2a(int id, char *buf, int len)
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80 | {
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81 | if (id < 0 || id >= 256) {
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82 | snprintf(buf, len, "%d", id);
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83 | return buf;
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84 | }
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85 |
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86 | rtnl_rtprot_initialize();
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87 |
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88 | if (rtnl_rtprot_tab[id])
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89 | return rtnl_rtprot_tab[id];
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90 | snprintf(buf, len, "%d", id);
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91 | return buf;
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92 | }
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93 |
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94 | int rtnl_rtprot_a2n(uint32_t *id, char *arg)
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95 | {
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96 | static const char *cache = NULL;
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97 | static unsigned long res;
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98 | int i;
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99 |
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100 | if (cache && strcmp(cache, arg) == 0) {
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101 | *id = res;
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102 | return 0;
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103 | }
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104 |
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105 | rtnl_rtprot_initialize();
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106 |
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107 | for (i = 0; i < 256; i++) {
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108 | if (rtnl_rtprot_tab[i] &&
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109 | strcmp(rtnl_rtprot_tab[i], arg) == 0) {
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110 | cache = rtnl_rtprot_tab[i];
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111 | res = i;
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112 | *id = res;
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113 | return 0;
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114 | }
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115 | }
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116 |
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117 | res = bb_strtoul(arg, NULL, 0);
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118 | if (errno || res > 255)
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119 | return -1;
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120 | *id = res;
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121 | return 0;
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122 | }
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123 |
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124 |
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125 | static const char **rtnl_rtscope_tab; /* [256] */
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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) return;
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130 | rtnl_rtscope_tab = xzalloc(256 * sizeof(rtnl_rtscope_tab[0]));
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131 | rtnl_rtscope_tab[0] = "global";
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132 | rtnl_rtscope_tab[255] = "nowhere";
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133 | rtnl_rtscope_tab[254] = "host";
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134 | rtnl_rtscope_tab[253] = "link";
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135 | rtnl_rtscope_tab[200] = "site";
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136 | rtnl_tab_initialize("/etc/iproute2/rt_scopes",
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137 | rtnl_rtscope_tab, 256);
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138 | }
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139 |
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140 |
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141 | const char* rtnl_rtscope_n2a(int id, char *buf, int len)
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142 | {
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143 | if (id < 0 || id >= 256) {
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144 | snprintf(buf, len, "%d", id);
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145 | return buf;
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146 | }
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147 |
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148 | rtnl_rtscope_initialize();
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149 |
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150 | if (rtnl_rtscope_tab[id])
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151 | return rtnl_rtscope_tab[id];
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152 | snprintf(buf, len, "%d", id);
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153 | return buf;
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154 | }
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155 |
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156 | int rtnl_rtscope_a2n(uint32_t *id, char *arg)
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157 | {
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158 | static const char *cache = NULL;
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159 | static unsigned long res;
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160 | int i;
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161 |
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162 | if (cache && strcmp(cache, arg) == 0) {
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163 | *id = res;
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164 | return 0;
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165 | }
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166 |
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167 | rtnl_rtscope_initialize();
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168 |
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169 | for (i = 0; i < 256; i++) {
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170 | if (rtnl_rtscope_tab[i] &&
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171 | strcmp(rtnl_rtscope_tab[i], arg) == 0) {
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172 | cache = rtnl_rtscope_tab[i];
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173 | res = i;
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174 | *id = res;
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175 | return 0;
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176 | }
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177 | }
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178 |
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179 | res = bb_strtoul(arg, NULL, 0);
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180 | if (errno || res > 255)
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181 | return -1;
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182 | *id = res;
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183 | return 0;
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184 | }
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185 |
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186 |
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187 | static const char **rtnl_rtrealm_tab; /* [256] */
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188 |
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189 | static void rtnl_rtrealm_initialize(void)
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190 | {
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191 | if (rtnl_rtrealm_tab) return;
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192 | rtnl_rtrealm_tab = xzalloc(256 * sizeof(rtnl_rtrealm_tab[0]));
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193 | rtnl_rtrealm_tab[0] = "unknown";
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194 | rtnl_tab_initialize("/etc/iproute2/rt_realms",
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195 | rtnl_rtrealm_tab, 256);
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196 | }
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197 |
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198 |
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199 | int rtnl_rtrealm_a2n(uint32_t *id, char *arg)
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200 | {
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201 | static const char *cache = NULL;
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202 | static unsigned long res;
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203 | int i;
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204 |
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205 | if (cache && strcmp(cache, arg) == 0) {
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206 | *id = res;
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207 | return 0;
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208 | }
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209 |
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210 | rtnl_rtrealm_initialize();
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211 |
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212 | for (i = 0; i < 256; i++) {
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213 | if (rtnl_rtrealm_tab[i] &&
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214 | strcmp(rtnl_rtrealm_tab[i], arg) == 0) {
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215 | cache = rtnl_rtrealm_tab[i];
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216 | res = i;
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217 | *id = res;
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218 | return 0;
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219 | }
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220 | }
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221 |
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222 | res = bb_strtoul(arg, NULL, 0);
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223 | if (errno || res > 255)
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224 | return -1;
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225 | *id = res;
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226 | return 0;
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227 | }
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228 |
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229 | #if ENABLE_FEATURE_IP_RULE
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230 | const char* rtnl_rtrealm_n2a(int id, char *buf, int len)
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231 | {
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232 | if (id < 0 || id >= 256) {
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233 | snprintf(buf, len, "%d", id);
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234 | return buf;
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235 | }
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236 |
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237 | rtnl_rtrealm_initialize();
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238 |
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239 | if (rtnl_rtrealm_tab[id])
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240 | return rtnl_rtrealm_tab[id];
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241 | snprintf(buf, len, "%d", id);
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242 | return buf;
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243 | }
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244 | #endif
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245 |
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246 |
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247 | static const char **rtnl_rtdsfield_tab; /* [256] */
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248 |
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249 | static void rtnl_rtdsfield_initialize(void)
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250 | {
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251 | if (rtnl_rtdsfield_tab) return;
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252 | rtnl_rtdsfield_tab = xzalloc(256 * sizeof(rtnl_rtdsfield_tab[0]));
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253 | rtnl_rtdsfield_tab[0] = "0";
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254 | rtnl_tab_initialize("/etc/iproute2/rt_dsfield",
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255 | rtnl_rtdsfield_tab, 256);
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256 | }
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257 |
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258 |
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259 | const char * rtnl_dsfield_n2a(int id, char *buf, int len)
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260 | {
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261 | if (id < 0 || id >= 256) {
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262 | snprintf(buf, len, "%d", id);
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263 | return buf;
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264 | }
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265 |
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266 | rtnl_rtdsfield_initialize();
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267 |
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268 | if (rtnl_rtdsfield_tab[id])
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269 | return rtnl_rtdsfield_tab[id];
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270 | snprintf(buf, len, "0x%02x", id);
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271 | return buf;
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272 | }
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273 |
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274 |
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275 | int rtnl_dsfield_a2n(uint32_t *id, char *arg)
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276 | {
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277 | static const char *cache = NULL;
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278 | static unsigned long res;
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279 | int i;
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280 |
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281 | if (cache && strcmp(cache, arg) == 0) {
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282 | *id = res;
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283 | return 0;
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284 | }
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285 |
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286 | rtnl_rtdsfield_initialize();
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287 |
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288 | for (i = 0; i < 256; i++) {
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289 | if (rtnl_rtdsfield_tab[i] &&
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290 | strcmp(rtnl_rtdsfield_tab[i], arg) == 0) {
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291 | cache = rtnl_rtdsfield_tab[i];
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292 | res = i;
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293 | *id = res;
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294 | return 0;
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295 | }
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296 | }
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297 |
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298 | res = bb_strtoul(arg, NULL, 16);
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299 | if (errno || res > 255)
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300 | return -1;
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301 | *id = res;
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302 | return 0;
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303 | }
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304 |
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305 |
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306 | #if ENABLE_FEATURE_IP_RULE
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307 | static const char **rtnl_rttable_tab; /* [256] */
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308 |
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309 | static void rtnl_rttable_initialize(void)
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310 | {
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311 | if (rtnl_rtdsfield_tab) return;
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312 | rtnl_rttable_tab = xzalloc(256 * sizeof(rtnl_rttable_tab[0]));
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313 | rtnl_rttable_tab[0] = "unspec";
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314 | rtnl_rttable_tab[255] = "local";
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315 | rtnl_rttable_tab[254] = "main";
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316 | rtnl_rttable_tab[253] = "default";
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317 | rtnl_tab_initialize("/etc/iproute2/rt_tables", rtnl_rttable_tab, 256);
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318 | }
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319 |
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320 |
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321 | const char *rtnl_rttable_n2a(int id, char *buf, int len)
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322 | {
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323 | if (id < 0 || id >= 256) {
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324 | snprintf(buf, len, "%d", id);
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325 | return buf;
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326 | }
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327 |
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328 | rtnl_rttable_initialize();
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329 |
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330 | if (rtnl_rttable_tab[id])
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331 | return rtnl_rttable_tab[id];
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332 | snprintf(buf, len, "%d", id);
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333 | return buf;
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334 | }
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335 |
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336 | int rtnl_rttable_a2n(uint32_t * id, char *arg)
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337 | {
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338 | static char *cache = NULL;
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339 | static unsigned long res;
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340 | int i;
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341 |
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342 | if (cache && strcmp(cache, arg) == 0) {
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343 | *id = res;
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344 | return 0;
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345 | }
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346 |
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347 | rtnl_rttable_initialize();
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348 |
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349 | for (i = 0; i < 256; i++) {
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350 | if (rtnl_rttable_tab[i] && strcmp(rtnl_rttable_tab[i], arg) == 0) {
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351 | cache = (char*)rtnl_rttable_tab[i];
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352 | res = i;
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353 | *id = res;
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354 | return 0;
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355 | }
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356 | }
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357 |
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358 | i = bb_strtoul(arg, NULL, 0);
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359 | if (errno || i > 255)
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360 | return -1;
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361 | *id = i;
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362 | return 0;
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363 | }
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364 |
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365 | #endif
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