iproute2/lib/rt_names.c
Stephen Hemminger 913352fe54 drop unneeded include of syslog.h
Only arpd uses syslog

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
2017-11-12 16:22:36 -08:00

677 lines
13 KiB
C

/*
* 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 <fcntl.h>
#include <string.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <dirent.h>
#include <limits.h>
#include <asm/types.h>
#include <linux/rtnetlink.h>
#include "rt_names.h"
#include "utils.h"
#define NAME_MAX_LEN 512
struct rtnl_hash_entry {
struct rtnl_hash_entry *next;
const char *name;
unsigned int id;
};
static int fread_id_name(FILE *fp, int *id, char *namebuf)
{
char buf[NAME_MAX_LEN];
while (fgets(buf, sizeof(buf), fp)) {
char *p = buf;
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) {
strcpy(namebuf, p);
return -1;
}
return 1;
}
return 0;
}
static void
rtnl_hash_initialize(const char *file, struct rtnl_hash_entry **hash, int size)
{
struct rtnl_hash_entry *entry;
FILE *fp;
int id;
char namebuf[NAME_MAX_LEN] = {0};
int ret;
fp = fopen(file, "r");
if (!fp)
return;
while ((ret = fread_id_name(fp, &id, &namebuf[0]))) {
if (ret == -1) {
fprintf(stderr, "Database %s is corrupted at %s\n",
file, namebuf);
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)
{
FILE *fp;
int id;
char namebuf[NAME_MAX_LEN] = {0};
int ret;
fp = fopen(file, "r");
if (!fp)
return;
while ((ret = fread_id_name(fp, &id, &namebuf[0]))) {
if (ret == -1) {
fprintf(stderr, "Database %s is corrupted at %s\n",
file, namebuf);
fclose(fp);
return;
}
if (id < 0 || id > size)
continue;
tab[id] = strdup(namebuf);
}
fclose(fp);
}
static char *rtnl_rtprot_tab[256] = {
[RTPROT_UNSPEC] = "unspec",
[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_BABEL] = "babel",
[RTPROT_DNROUTED] = "dnrouted",
[RTPROT_XORP] = "xorp",
[RTPROT_NTK] = "ntk",
[RTPROT_DHCP] = "dhcp",
};
static int rtnl_rtprot_init;
static void rtnl_rtprot_initialize(void)
{
struct dirent *de;
DIR *d;
rtnl_rtprot_init = 1;
rtnl_tab_initialize(CONFDIR "/rt_protos",
rtnl_rtprot_tab, 256);
d = opendir(CONFDIR "/rt_protos.d");
if (!d)
return;
while ((de = readdir(d)) != NULL) {
char path[PATH_MAX];
size_t len;
if (*de->d_name == '.')
continue;
/* only consider filenames ending in '.conf' */
len = strlen(de->d_name);
if (len <= 5)
continue;
if (strcmp(de->d_name + len - 5, ".conf"))
continue;
snprintf(path, sizeof(path), CONFDIR "/rt_protos.d/%s",
de->d_name);
rtnl_tab_initialize(path, rtnl_rtprot_tab, 256);
}
closedir(d);
}
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;
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] = {
[RT_SCOPE_UNIVERSE] = "global",
[RT_SCOPE_NOWHERE] = "nowhere",
[RT_SCOPE_HOST] = "host",
[RT_SCOPE_LINK] = "link",
[RT_SCOPE_SITE] = "site",
};
static int rtnl_rtscope_init;
static void rtnl_rtscope_initialize(void)
{
rtnl_rtscope_init = 1;
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;
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;
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 = { .name = "default" };
static struct rtnl_hash_entry main_table_entry = { .name = "main" };
static struct rtnl_hash_entry local_table_entry = { .name = "local" };
static struct rtnl_hash_entry *rtnl_rttable_hash[256] = {
[RT_TABLE_DEFAULT] = &dflt_table_entry,
[RT_TABLE_MAIN] = &main_table_entry,
[RT_TABLE_LOCAL] = &local_table_entry,
};
static int rtnl_rttable_init;
static void rtnl_rttable_initialize(void)
{
struct dirent *de;
DIR *d;
int i;
rtnl_rttable_init = 1;
for (i = 0; i < 256; i++) {
if (rtnl_rttable_hash[i])
rtnl_rttable_hash[i]->id = i;
}
rtnl_hash_initialize(CONFDIR "/rt_tables",
rtnl_rttable_hash, 256);
d = opendir(CONFDIR "/rt_tables.d");
if (!d)
return;
while ((de = readdir(d)) != NULL) {
char path[PATH_MAX];
size_t len;
if (*de->d_name == '.')
continue;
/* only consider filenames ending in '.conf' */
len = strlen(de->d_name);
if (len <= 5)
continue;
if (strcmp(de->d_name + len - 5, ".conf"))
continue;
snprintf(path, sizeof(path),
CONFDIR "/rt_tables.d/%s", de->d_name);
rtnl_hash_initialize(path, rtnl_rttable_hash, 256);
}
closedir(d);
}
const char *rtnl_rttable_n2a(__u32 id, char *buf, int len)
{
struct rtnl_hash_entry *entry;
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;
static unsigned long res;
struct rtnl_hash_entry *entry;
char *end;
unsigned long 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;
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(CONFDIR "/group",
rtnl_group_hash, 256);
}
int rtnl_group_a2n(int *id, const char *arg)
{
static const char *cache;
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];
while (entry) {
if (entry->id == id)
return entry->name;
entry = entry->next;
}
}
snprintf(buf, len, "%d", id);
return buf;
}
static char *nl_proto_tab[256] = {
[NETLINK_ROUTE] = "rtnl",
[NETLINK_UNUSED] = "unused",
[NETLINK_USERSOCK] = "usersock",
[NETLINK_FIREWALL] = "fw",
[NETLINK_SOCK_DIAG] = "tcpdiag",
[NETLINK_NFLOG] = "nflog",
[NETLINK_XFRM] = "xfrm",
[NETLINK_SELINUX] = "selinux",
[NETLINK_ISCSI] = "iscsi",
[NETLINK_AUDIT] = "audit",
[NETLINK_FIB_LOOKUP] = "fiblookup",
[NETLINK_CONNECTOR] = "connector",
[NETLINK_NETFILTER] = "nft",
[NETLINK_IP6_FW] = "ip6fw",
[NETLINK_DNRTMSG] = "dec-rt",
[NETLINK_KOBJECT_UEVENT] = "uevent",
[NETLINK_GENERIC] = "genl",
[NETLINK_SCSITRANSPORT] = "scsi-trans",
[NETLINK_ECRYPTFS] = "ecryptfs",
[NETLINK_RDMA] = "rdma",
[NETLINK_CRYPTO] = "crypto",
};
static int nl_proto_init;
static void nl_proto_initialize(void)
{
nl_proto_init = 1;
rtnl_tab_initialize(CONFDIR "/nl_protos",
nl_proto_tab, 256);
}
const char *nl_proto_n2a(int id, char *buf, int len)
{
if (id < 0 || id >= 256) {
snprintf(buf, len, "%u", id);
return buf;
}
if (!nl_proto_init)
nl_proto_initialize();
if (nl_proto_tab[id])
return nl_proto_tab[id];
snprintf(buf, len, "%u", id);
return buf;
}
int nl_proto_a2n(__u32 *id, const char *arg)
{
static char *cache;
static unsigned long res;
char *end;
int i;
if (cache && strcmp(cache, arg) == 0) {
*id = res;
return 0;
}
if (!nl_proto_init)
nl_proto_initialize();
for (i = 0; i < 256; i++) {
if (nl_proto_tab[i] &&
strcmp(nl_proto_tab[i], arg) == 0) {
cache = nl_proto_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;
}