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/* vi: set sw=4 ts=4: */
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*/
#include "libbb.h"
#include "rt_names.h"
#define CONFDIR CONFIG_FEATURE_IP_ROUTE_DIR
typedef struct rtnl_tab_t {
const char *cached_str;
unsigned cached_result;
/* upstream version switched to a hash table and removed
* id < 256 limit. For now bbox bumps this array size from 256
* to 1024. If you plan to change this to a hash table,
* consider merging several hash tables we have (for example,
* awk has resizable one!
*/
#define RT_TABLE_MAX 1023
const char *tab[RT_TABLE_MAX+1];
} rtnl_tab_t;
static void rtnl_tab_initialize(const char *file, const char **tab)
{
char *token[2];
char fullname[sizeof(CONFDIR"/rt_dsfield") + 8];
parser_t *parser;
sprintf(fullname, CONFDIR"/rt_%s", file);
parser = config_open2(fullname, fopen_for_read);
while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL)) {
unsigned id = bb_strtou(token[0], NULL, 0);
if (id > RT_TABLE_MAX) {
bb_error_msg("database %s is corrupted at line %d",
file, parser->lineno);
break;
}
tab[id] = xstrdup(token[1]);
}
config_close(parser);
}
static int rtnl_a2n(rtnl_tab_t *tab, uint32_t *id, const char *arg, int base)
{
unsigned i;
if (tab->cached_str && strcmp(tab->cached_str, arg) == 0) {
*id = tab->cached_result;
return 0;
}
for (i = 0; i <= RT_TABLE_MAX; i++) {
if (tab->tab[i]
&& strcmp(tab->tab[i], arg) == 0
) {
tab->cached_str = tab->tab[i];
tab->cached_result = i;
*id = i;
return 0;
}
}
i = bb_strtou(arg, NULL, base);
if (i > RT_TABLE_MAX)
return -1;
*id = i;
return 0;
}
static rtnl_tab_t *rtnl_rtprot_tab;
static void rtnl_rtprot_initialize(void)
{
static const char *const init_tab[] ALIGN_PTR = {
"none",
"redirect",
"kernel",
"boot",
"static",
NULL,
NULL,
NULL,
"gated",
"ra",
"mrt",
"zebra",
"bird",
};
if (rtnl_rtprot_tab)
return;
rtnl_rtprot_tab = xzalloc(sizeof(*rtnl_rtprot_tab));
memcpy(rtnl_rtprot_tab->tab, init_tab, sizeof(init_tab));
rtnl_tab_initialize("protos", rtnl_rtprot_tab->tab);
}
#if 0 /* UNUSED */
const char* FAST_FUNC rtnl_rtprot_n2a(int id)
{
if (id < 0 || id > RT_TABLE_MAX) {
return itoa(id);
}
rtnl_rtprot_initialize();
if (rtnl_rtprot_tab->tab[id])
return rtnl_rtprot_tab->tab[id];
return itoa(id);
}
#endif
int FAST_FUNC rtnl_rtprot_a2n(uint32_t *id, char *arg)
{
rtnl_rtprot_initialize();
return rtnl_a2n(rtnl_rtprot_tab, id, arg, 0);
}
static rtnl_tab_t *rtnl_rtscope_tab;
static void rtnl_rtscope_initialize(void)
{
if (rtnl_rtscope_tab)
return;
rtnl_rtscope_tab = xzalloc(sizeof(*rtnl_rtscope_tab));
rtnl_rtscope_tab->tab[0] = "global";
rtnl_rtscope_tab->tab[255] = "nowhere";
rtnl_rtscope_tab->tab[254] = "host";
rtnl_rtscope_tab->tab[253] = "link";
rtnl_rtscope_tab->tab[200] = "site";
rtnl_tab_initialize("scopes", rtnl_rtscope_tab->tab);
}
const char* FAST_FUNC rtnl_rtscope_n2a(int id)
{
if (id < 0 || id > RT_TABLE_MAX) {
return itoa(id);
}
rtnl_rtscope_initialize();
if (rtnl_rtscope_tab->tab[id])
return rtnl_rtscope_tab->tab[id];
return itoa(id);
}
int FAST_FUNC rtnl_rtscope_a2n(uint32_t *id, char *arg)
{
rtnl_rtscope_initialize();
return rtnl_a2n(rtnl_rtscope_tab, id, arg, 0);
}
static rtnl_tab_t *rtnl_rtrealm_tab;
static void rtnl_rtrealm_initialize(void)
{
if (rtnl_rtrealm_tab) return;
rtnl_rtrealm_tab = xzalloc(sizeof(*rtnl_rtrealm_tab));
rtnl_rtrealm_tab->tab[0] = "unknown";
rtnl_tab_initialize("realms", rtnl_rtrealm_tab->tab);
}
int FAST_FUNC rtnl_rtrealm_a2n(uint32_t *id, char *arg)
{
rtnl_rtrealm_initialize();
return rtnl_a2n(rtnl_rtrealm_tab, id, arg, 0);
}
#if ENABLE_FEATURE_IP_RULE
const char* FAST_FUNC rtnl_rtrealm_n2a(int id)
{
if (id < 0 || id > RT_TABLE_MAX) {
return itoa(id);
}
rtnl_rtrealm_initialize();
if (rtnl_rtrealm_tab->tab[id])
return rtnl_rtrealm_tab->tab[id];
return itoa(id);
}
#endif
static rtnl_tab_t *rtnl_rtdsfield_tab;
static void rtnl_rtdsfield_initialize(void)
{
if (rtnl_rtdsfield_tab) return;
rtnl_rtdsfield_tab = xzalloc(sizeof(*rtnl_rtdsfield_tab));
rtnl_rtdsfield_tab->tab[0] = "0";
rtnl_tab_initialize("dsfield", rtnl_rtdsfield_tab->tab);
}
const char* FAST_FUNC rtnl_dsfield_n2a(int id)
{
if (id < 0 || id > RT_TABLE_MAX) {
return itoa(id);
}
rtnl_rtdsfield_initialize();
if (rtnl_rtdsfield_tab->tab[id])
return rtnl_rtdsfield_tab->tab[id];
return itoa(id);
}
int FAST_FUNC rtnl_dsfield_a2n(uint32_t *id, char *arg)
{
rtnl_rtdsfield_initialize();
return rtnl_a2n(rtnl_rtdsfield_tab, id, arg, 16);
}
#if ENABLE_FEATURE_IP_RULE
static rtnl_tab_t *rtnl_rttable_tab;
static void rtnl_rttable_initialize(void)
{
if (rtnl_rttable_tab)
return;
rtnl_rttable_tab = xzalloc(sizeof(*rtnl_rttable_tab));
rtnl_rttable_tab->tab[0] = "unspec";
rtnl_rttable_tab->tab[255] = "local";
rtnl_rttable_tab->tab[254] = "main";
rtnl_rttable_tab->tab[253] = "default";
rtnl_tab_initialize("tables", rtnl_rttable_tab->tab);
}
const char* FAST_FUNC rtnl_rttable_n2a(int id)
{
if (id < 0 || id > RT_TABLE_MAX) {
return itoa(id);
}
rtnl_rttable_initialize();
if (rtnl_rttable_tab->tab[id])
return rtnl_rttable_tab->tab[id];
return itoa(id);
}
int FAST_FUNC rtnl_rttable_a2n(uint32_t *id, char *arg)
{
rtnl_rttable_initialize();
return rtnl_a2n(rtnl_rttable_tab, id, arg, 0);
}
#endif
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