release/src/router/busybox/networking/libiproute/rt_names.c

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