blob: 67e4c49f44d28759af4fee5603a52402bd3c1049 [file] [log] [blame]
/*
* rt_names.c rtnetlink names DB.
*
* 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <string.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <asm/types.h>
#include <linux/rtnetlink.h>
#include "rt_names.h"
#ifndef CONFDIR
#define CONFDIR "/etc/iproute2"
#endif
struct rtnl_hash_entry {
struct rtnl_hash_entry *next;
const char * name;
unsigned int id;
};
static void
rtnl_hash_initialize(const char *file, struct rtnl_hash_entry **hash, int size)
{
struct rtnl_hash_entry *entry;
char buf[512];
FILE *fp;
fp = fopen(file, "r");
if (!fp)
return;
while (fgets(buf, sizeof(buf), fp)) {
char *p = buf;
int id;
char namebuf[512];
while (*p == ' ' || *p == '\t')
p++;
if (*p == '#' || *p == '\n' || *p == 0)
continue;
if (sscanf(p, "0x%x %s\n", &id, namebuf) != 2 &&
sscanf(p, "0x%x %s #", &id, namebuf) != 2 &&
sscanf(p, "%d %s\n", &id, namebuf) != 2 &&
sscanf(p, "%d %s #", &id, namebuf) != 2) {
fprintf(stderr, "Database %s is corrupted at %s\n",
file, p);
fclose(fp);
return;
}
if (id<0)
continue;
entry = malloc(sizeof(*entry));
entry->id = id;
entry->name = strdup(namebuf);
entry->next = hash[id & (size - 1)];
hash[id & (size - 1)] = entry;
}
fclose(fp);
}
static void rtnl_tab_initialize(const char *file, char **tab, int size)
{
char buf[512];
FILE *fp;
fp = fopen(file, "r");
if (!fp)
return;
while (fgets(buf, sizeof(buf), fp)) {
char *p = buf;
int id;
char namebuf[512];
while (*p == ' ' || *p == '\t')
p++;
if (*p == '#' || *p == '\n' || *p == 0)
continue;
if (sscanf(p, "0x%x %s\n", &id, namebuf) != 2 &&
sscanf(p, "0x%x %s #", &id, namebuf) != 2 &&
sscanf(p, "%d %s\n", &id, namebuf) != 2 &&
sscanf(p, "%d %s #", &id, namebuf) != 2) {
fprintf(stderr, "Database %s is corrupted at %s\n",
file, p);
fclose(fp);
return;
}
if (id<0 || id>size)
continue;
tab[id] = strdup(namebuf);
}
fclose(fp);
}
static char * rtnl_rtprot_tab[256] = {
[RTPROT_UNSPEC] = "none",
[RTPROT_REDIRECT] ="redirect",
[RTPROT_KERNEL] = "kernel",
[RTPROT_BOOT] = "boot",
[RTPROT_STATIC] = "static",
[RTPROT_GATED] = "gated",
[RTPROT_RA] = "ra",
[RTPROT_MRT] = "mrt",
[RTPROT_ZEBRA] ="zebra",
[RTPROT_BIRD] = "bird",
[RTPROT_DNROUTED] = "dnrouted",
[RTPROT_XORP] = "xorp",
[RTPROT_NTK] = "ntk",
[RTPROT_DHCP] = "dhcp",
};
static int rtnl_rtprot_init;
static void rtnl_rtprot_initialize(void)
{
rtnl_rtprot_init = 1;
rtnl_tab_initialize(CONFDIR "/rt_protos",
rtnl_rtprot_tab, 256);
}
const char * rtnl_rtprot_n2a(int id, char *buf, int len)
{
if (id<0 || id>=256) {
snprintf(buf, len, "%u", id);
return buf;
}
if (!rtnl_rtprot_tab[id]) {
if (!rtnl_rtprot_init)
rtnl_rtprot_initialize();
}
if (rtnl_rtprot_tab[id])
return rtnl_rtprot_tab[id];
snprintf(buf, len, "%u", id);
return buf;
}
int rtnl_rtprot_a2n(__u32 *id, const char *arg)
{
static char *cache = NULL;
static unsigned long res;
char *end;
int i;
if (cache && strcmp(cache, arg) == 0) {
*id = res;
return 0;
}
if (!rtnl_rtprot_init)
rtnl_rtprot_initialize();
for (i=0; i<256; i++) {
if (rtnl_rtprot_tab[i] &&
strcmp(rtnl_rtprot_tab[i], arg) == 0) {
cache = rtnl_rtprot_tab[i];
res = i;
*id = res;
return 0;
}
}
res = strtoul(arg, &end, 0);
if (!end || end == arg || *end || res > 255)
return -1;
*id = res;
return 0;
}
static char * rtnl_rtscope_tab[256] = {
"global",
};
static int rtnl_rtscope_init;
static void rtnl_rtscope_initialize(void)
{
rtnl_rtscope_init = 1;
rtnl_rtscope_tab[255] = "nowhere";
rtnl_rtscope_tab[254] = "host";
rtnl_rtscope_tab[253] = "link";
rtnl_rtscope_tab[200] = "site";
rtnl_tab_initialize(CONFDIR "/rt_scopes",
rtnl_rtscope_tab, 256);
}
const char *rtnl_rtscope_n2a(int id, char *buf, int len)
{
if (id<0 || id>=256) {
snprintf(buf, len, "%d", id);
return buf;
}
if (!rtnl_rtscope_tab[id]) {
if (!rtnl_rtscope_init)
rtnl_rtscope_initialize();
}
if (rtnl_rtscope_tab[id])
return rtnl_rtscope_tab[id];
snprintf(buf, len, "%d", id);
return buf;
}
int rtnl_rtscope_a2n(__u32 *id, const char *arg)
{
static const char *cache = NULL;
static unsigned long res;
char *end;
int i;
if (cache && strcmp(cache, arg) == 0) {
*id = res;
return 0;
}
if (!rtnl_rtscope_init)
rtnl_rtscope_initialize();
for (i=0; i<256; i++) {
if (rtnl_rtscope_tab[i] &&
strcmp(rtnl_rtscope_tab[i], arg) == 0) {
cache = rtnl_rtscope_tab[i];
res = i;
*id = res;
return 0;
}
}
res = strtoul(arg, &end, 0);
if (!end || end == arg || *end || res > 255)
return -1;
*id = res;
return 0;
}
static char * rtnl_rtrealm_tab[256] = {
"unknown",
};
static int rtnl_rtrealm_init;
static void rtnl_rtrealm_initialize(void)
{
rtnl_rtrealm_init = 1;
rtnl_tab_initialize(CONFDIR "/rt_realms",
rtnl_rtrealm_tab, 256);
}
const char *rtnl_rtrealm_n2a(int id, char *buf, int len)
{
if (id<0 || id>=256) {
snprintf(buf, len, "%d", id);
return buf;
}
if (!rtnl_rtrealm_tab[id]) {
if (!rtnl_rtrealm_init)
rtnl_rtrealm_initialize();
}
if (rtnl_rtrealm_tab[id])
return rtnl_rtrealm_tab[id];
snprintf(buf, len, "%d", id);
return buf;
}
int rtnl_rtrealm_a2n(__u32 *id, const char *arg)
{
static char *cache = NULL;
static unsigned long res;
char *end;
int i;
if (cache && strcmp(cache, arg) == 0) {
*id = res;
return 0;
}
if (!rtnl_rtrealm_init)
rtnl_rtrealm_initialize();
for (i=0; i<256; i++) {
if (rtnl_rtrealm_tab[i] &&
strcmp(rtnl_rtrealm_tab[i], arg) == 0) {
cache = rtnl_rtrealm_tab[i];
res = i;
*id = res;
return 0;
}
}
res = strtoul(arg, &end, 0);
if (!end || end == arg || *end || res > 255)
return -1;
*id = res;
return 0;
}
static struct rtnl_hash_entry dflt_table_entry = { .id = 253, .name = "default" };
static struct rtnl_hash_entry main_table_entry = { .id = 254, .name = "main" };
static struct rtnl_hash_entry local_table_entry = { .id = 255, .name = "local" };
static struct rtnl_hash_entry * rtnl_rttable_hash[256] = {
[253] = &dflt_table_entry,
[254] = &main_table_entry,
[255] = &local_table_entry,
};
static int rtnl_rttable_init;
static void rtnl_rttable_initialize(void)
{
rtnl_rttable_init = 1;
rtnl_hash_initialize(CONFDIR "/rt_tables",
rtnl_rttable_hash, 256);
}
const char * rtnl_rttable_n2a(__u32 id, char *buf, int len)
{
struct rtnl_hash_entry *entry;
if (id > RT_TABLE_MAX) {
snprintf(buf, len, "%u", id);
return buf;
}
if (!rtnl_rttable_init)
rtnl_rttable_initialize();
entry = rtnl_rttable_hash[id & 255];
while (entry && entry->id != id)
entry = entry->next;
if (entry)
return entry->name;
snprintf(buf, len, "%u", id);
return buf;
}
int rtnl_rttable_a2n(__u32 *id, const char *arg)
{
static const char *cache = NULL;
static unsigned long res;
struct rtnl_hash_entry *entry;
char *end;
__u32 i;
if (cache && strcmp(cache, arg) == 0) {
*id = res;
return 0;
}
if (!rtnl_rttable_init)
rtnl_rttable_initialize();
for (i=0; i<256; i++) {
entry = rtnl_rttable_hash[i];
while (entry && strcmp(entry->name, arg))
entry = entry->next;
if (entry) {
cache = entry->name;
res = entry->id;
*id = res;
return 0;
}
}
i = strtoul(arg, &end, 0);
if (!end || end == arg || *end || i > RT_TABLE_MAX)
return -1;
*id = i;
return 0;
}
static char * rtnl_rtdsfield_tab[256] = {
"0",
};
static int rtnl_rtdsfield_init;
static void rtnl_rtdsfield_initialize(void)
{
rtnl_rtdsfield_init = 1;
rtnl_tab_initialize(CONFDIR "/rt_dsfield",
rtnl_rtdsfield_tab, 256);
}
const char *rtnl_dsfield_n2a(int id, char *buf, int len)
{
if (id<0 || id>=256) {
snprintf(buf, len, "%d", id);
return buf;
}
if (!rtnl_rtdsfield_tab[id]) {
if (!rtnl_rtdsfield_init)
rtnl_rtdsfield_initialize();
}
if (rtnl_rtdsfield_tab[id])
return rtnl_rtdsfield_tab[id];
snprintf(buf, len, "0x%02x", id);
return buf;
}
int rtnl_dsfield_a2n(__u32 *id, const char *arg)
{
static char *cache = NULL;
static unsigned long res;
char *end;
int i;
if (cache && strcmp(cache, arg) == 0) {
*id = res;
return 0;
}
if (!rtnl_rtdsfield_init)
rtnl_rtdsfield_initialize();
for (i=0; i<256; i++) {
if (rtnl_rtdsfield_tab[i] &&
strcmp(rtnl_rtdsfield_tab[i], arg) == 0) {
cache = rtnl_rtdsfield_tab[i];
res = i;
*id = res;
return 0;
}
}
res = strtoul(arg, &end, 16);
if (!end || end == arg || *end || res > 255)
return -1;
*id = res;
return 0;
}
static struct rtnl_hash_entry dflt_group_entry = { .id = 0, .name = "default" };
static struct rtnl_hash_entry * rtnl_group_hash[256] = {
[0] = &dflt_group_entry,
};
static int rtnl_group_init;
static void rtnl_group_initialize(void)
{
rtnl_group_init = 1;
rtnl_hash_initialize("/etc/iproute2/group",
rtnl_group_hash, 256);
}
int rtnl_group_a2n(int *id, const char *arg)
{
static const char *cache = NULL;
static unsigned long res;
struct rtnl_hash_entry *entry;
char *end;
int i;
if (cache && strcmp(cache, arg) == 0) {
*id = res;
return 0;
}
if (!rtnl_group_init)
rtnl_group_initialize();
for (i=0; i<256; i++) {
entry = rtnl_group_hash[i];
while (entry && strcmp(entry->name, arg))
entry = entry->next;
if (entry) {
cache = entry->name;
res = entry->id;
*id = res;
return 0;
}
}
i = strtol(arg, &end, 0);
if (!end || end == arg || *end || i < 0)
return -1;
*id = i;
return 0;
}
const char *rtnl_group_n2a(int id, char *buf, int len)
{
struct rtnl_hash_entry *entry;
int i;
if (!rtnl_group_init)
rtnl_group_initialize();
for (i=0; i<256; i++) {
entry = rtnl_group_hash[i];
if (entry && entry->id == id) {
return entry->name;
}
}
snprintf(buf, len, "%d", id);
return buf;
}