Adding upstream version 6.8.0.upstream/6.8.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 892 insertions, 0 deletions

diff --git a/lib/rt_names.c b/lib/rt_names.c
new file mode 100644
index 0000000..dafef3f
--- /dev/null
+++ b/lib/rt_names.c
@@ -0,0 +1,892 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * rt_names.c		rtnetlink names DB.
+ *
+ * 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 <sys/stat.h>
+#include <dirent.h>
+#include <limits.h>
+#include <errno.h>
+
+#include <asm/types.h>
+#include <linux/rtnetlink.h>
+
+#include "rt_names.h"
+#include "utils.h"
+
+#define NAME_MAX_LEN 512
+
+int numeric;
+
+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 int
+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 -errno;
+
+	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 -EINVAL;
+		}
+
+		if (id < 0)
+			continue;
+
+		entry = malloc(sizeof(*entry));
+		if (entry == NULL) {
+			fprintf(stderr, "malloc error: for entry\n");
+			break;
+		}
+		entry->id   = id;
+		entry->name = strdup(namebuf);
+		entry->next = hash[id & (size - 1)];
+		hash[id & (size - 1)] = entry;
+	}
+	fclose(fp);
+
+	return 0;
+}
+
+static int 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 -errno;
+
+	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 -EINVAL;
+		}
+		if (id < 0 || id > size)
+			continue;
+
+		tab[id] = strdup(namebuf);
+	}
+	fclose(fp);
+
+	return 0;
+}
+
+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",
+	[RTPROT_KEEPALIVED] = "keepalived",
+	[RTPROT_BGP]	    = "bgp",
+	[RTPROT_ISIS]	    = "isis",
+	[RTPROT_OSPF]	    = "ospf",
+	[RTPROT_RIP]	    = "rip",
+	[RTPROT_EIGRP]	    = "eigrp",
+};
+
+struct tabhash {
+	enum { TAB, HASH } type;
+	union tab_or_hash {
+		char **tab;
+		struct rtnl_hash_entry **hash;
+	} data;
+};
+
+static void
+rtnl_tabhash_readdir(const char *dirpath_base, const char *dirpath_overload,
+                     const struct tabhash tabhash, const int size)
+{
+	struct dirent *de;
+	DIR *d;
+
+	d = opendir(dirpath_base);
+	while (d && (de = readdir(d)) != NULL) {
+		char path[PATH_MAX];
+		size_t len;
+		struct stat sb;
+
+		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;
+
+		if (dirpath_overload) {
+			/* only consider filenames not present in
+			   the overloading directory, e.g. /etc */
+			snprintf(path, sizeof(path), "%s/%s", dirpath_overload, de->d_name);
+			if (lstat(path, &sb) == 0)
+				continue;
+		}
+
+		/* load the conf file in the base directory, e.g., /usr */
+		snprintf(path, sizeof(path), "%s/%s", dirpath_base, de->d_name);
+		if (tabhash.type == TAB)
+			rtnl_tab_initialize(path, tabhash.data.tab, size);
+		else
+			rtnl_hash_initialize(path, tabhash.data.hash, size);
+	}
+	if (d)
+		closedir(d);
+}
+
+static void
+rtnl_tabhash_initialize_dir(const char *ddir, const struct tabhash tabhash, const int size)
+{
+	char dirpath_usr[PATH_MAX], dirpath_etc[PATH_MAX];
+
+	snprintf(dirpath_usr, sizeof(dirpath_usr), "%s/%s", CONF_USR_DIR, ddir);
+	snprintf(dirpath_etc, sizeof(dirpath_etc), "%s/%s", CONF_ETC_DIR, ddir);
+
+	/* load /usr/lib/iproute2/foo.d/X conf files, unless /etc/iproute2/foo.d/X exists */
+	rtnl_tabhash_readdir(dirpath_usr, dirpath_etc, tabhash, size);
+
+	/* load /etc/iproute2/foo.d/X conf files */
+	rtnl_tabhash_readdir(dirpath_etc, NULL, tabhash, size);
+}
+
+static void
+rtnl_tab_initialize_dir(const char *ddir, char **tab, const int size) {
+	struct tabhash tab_data = {.type = TAB, .data.tab = tab};
+	rtnl_tabhash_initialize_dir(ddir, tab_data, size);
+}
+
+static void
+rtnl_hash_initialize_dir(const char *ddir, struct rtnl_hash_entry **hash,
+                         const int size) {
+	struct tabhash hash_data = {.type = HASH, .data.hash = hash};
+	rtnl_tabhash_initialize_dir(ddir, hash_data, size);
+}
+
+static int rtnl_rtprot_init;
+
+static void rtnl_rtprot_initialize(void)
+{
+	int ret;
+
+	rtnl_rtprot_init = 1;
+	ret = rtnl_tab_initialize(CONF_ETC_DIR "/rt_protos",
+	                          rtnl_rtprot_tab, 256);
+	if (ret == -ENOENT)
+		rtnl_tab_initialize(CONF_USR_DIR "/rt_protos",
+		                    rtnl_rtprot_tab, 256);
+
+	rtnl_tab_initialize_dir("rt_protos.d", rtnl_rtprot_tab, 256);
+}
+
+const char *rtnl_rtprot_n2a(int id, char *buf, int len)
+{
+	if (id < 0 || id >= 256 || numeric) {
+		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_addrprot_tab[256] = {
+	[IFAPROT_UNSPEC]    = "unspec",
+	[IFAPROT_KERNEL_LO] = "kernel_lo",
+	[IFAPROT_KERNEL_RA] = "kernel_ra",
+	[IFAPROT_KERNEL_LL] = "kernel_ll",
+};
+static bool rtnl_addrprot_tab_initialized;
+
+static void rtnl_addrprot_initialize(void)
+{
+	int ret;
+
+	rtnl_addrprot_tab_initialized = true;
+
+	ret = rtnl_tab_initialize(CONF_ETC_DIR "/rt_addrprotos",
+	                          rtnl_addrprot_tab,
+	                          ARRAY_SIZE(rtnl_addrprot_tab));
+	if (ret == -ENOENT)
+		ret = rtnl_tab_initialize(CONF_USR_DIR "/rt_addrprotos",
+		                          rtnl_addrprot_tab,
+		                          ARRAY_SIZE(rtnl_addrprot_tab));
+}
+
+const char *rtnl_addrprot_n2a(__u8 id, char *buf, int len)
+{
+	if (numeric)
+		goto numeric;
+	if (!rtnl_addrprot_tab_initialized)
+		rtnl_addrprot_initialize();
+	if (rtnl_addrprot_tab[id])
+		return rtnl_addrprot_tab[id];
+numeric:
+	snprintf(buf, len, "%#x", id);
+	return buf;
+}
+
+int rtnl_addrprot_a2n(__u8 *id, const char *arg)
+{
+	unsigned long res;
+	char *end;
+	int i;
+
+	if (!rtnl_addrprot_tab_initialized)
+		rtnl_addrprot_initialize();
+
+	for (i = 0; i < 256; i++) {
+		if (rtnl_addrprot_tab[i] &&
+		    strcmp(rtnl_addrprot_tab[i], arg) == 0) {
+			*id = i;
+			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)
+{
+	int ret;
+
+	rtnl_rtscope_init = 1;
+	ret = rtnl_tab_initialize(CONF_ETC_DIR "/rt_scopes",
+			          rtnl_rtscope_tab, 256);
+	if (ret == -ENOENT)
+		rtnl_tab_initialize(CONF_USR_DIR "/rt_scopes",
+				    rtnl_rtscope_tab, 256);
+}
+
+const char *rtnl_rtscope_n2a(int id, char *buf, int len)
+{
+	if (id < 0 || id >= 256 || numeric) {
+		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)
+{
+	int ret;
+
+	rtnl_rtrealm_init = 1;
+	ret = rtnl_tab_initialize(CONF_ETC_DIR "/rt_realms",
+	                          rtnl_rtrealm_tab, 256);
+	if (ret == -ENOENT)
+		rtnl_tab_initialize(CONF_USR_DIR "/rt_realms",
+		                    rtnl_rtrealm_tab, 256);
+}
+
+const char *rtnl_rtrealm_n2a(int id, char *buf, int len)
+{
+	if (id < 0 || id >= 256 || numeric) {
+		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)
+{
+	int i;
+	int ret;
+
+	rtnl_rttable_init = 1;
+	for (i = 0; i < 256; i++) {
+		if (rtnl_rttable_hash[i])
+			rtnl_rttable_hash[i]->id = i;
+	}
+	ret = rtnl_hash_initialize(CONF_ETC_DIR "/rt_tables",
+	                           rtnl_rttable_hash, 256);
+	if (ret == -ENOENT)
+		rtnl_hash_initialize(CONF_USR_DIR "/rt_tables",
+		                     rtnl_rttable_hash, 256);
+
+	rtnl_hash_initialize_dir("rt_tables.d", rtnl_rttable_hash, 256);
+}
+
+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 (!numeric && 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)
+{
+	int ret;
+
+	rtnl_rtdsfield_init = 1;
+	ret = rtnl_tab_initialize(CONF_ETC_DIR "/rt_dsfield",
+	                          rtnl_rtdsfield_tab, 256);
+	if (ret == -ENOENT)
+		rtnl_tab_initialize(CONF_USR_DIR "/rt_dsfield",
+		                    rtnl_rtdsfield_tab, 256);
+}
+
+const char *rtnl_dsfield_n2a(int id, char *buf, int len)
+{
+	const char *name;
+
+	if (id < 0 || id >= 256) {
+		snprintf(buf, len, "%d", id);
+		return buf;
+	}
+	if (!numeric) {
+		name = rtnl_dsfield_get_name(id);
+		if (name != NULL)
+			return name;
+	}
+	snprintf(buf, len, "0x%02x", id);
+	return buf;
+}
+
+const char *rtnl_dsfield_get_name(int id)
+{
+	if (id < 0 || id >= 256)
+		return NULL;
+	if (!rtnl_rtdsfield_tab[id]) {
+		if (!rtnl_rtdsfield_init)
+			rtnl_rtdsfield_initialize();
+	}
+	return rtnl_rtdsfield_tab[id];
+}
+
+
+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)
+{
+	int ret;
+
+	rtnl_group_init = 1;
+	ret = rtnl_hash_initialize(CONF_ETC_DIR "/group",
+	                           rtnl_group_hash, 256);
+	if (ret == -ENOENT)
+		rtnl_hash_initialize(CONF_USR_DIR "/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; !numeric && 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)
+{
+	int ret;
+
+	nl_proto_init = 1;
+	ret = rtnl_tab_initialize(CONF_ETC_DIR "/nl_protos",
+	                          nl_proto_tab, 256);
+	if (ret == -ENOENT)
+		rtnl_tab_initialize(CONF_USR_DIR "/nl_protos",
+		                    nl_proto_tab, 256);
+}
+
+const char *nl_proto_n2a(int id, char *buf, int len)
+{
+	if (id < 0 || id >= 256 || numeric) {
+		snprintf(buf, len, "%d", 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;
+}
+
+#define PROTODOWN_REASON_NUM_BITS 32
+static char *protodown_reason_tab[PROTODOWN_REASON_NUM_BITS] = {
+};
+
+static int protodown_reason_init;
+
+static void protodown_reason_initialize(void)
+{
+	protodown_reason_init = 1;
+
+	rtnl_tab_initialize_dir("protodown_reasons.d", protodown_reason_tab,
+                                PROTODOWN_REASON_NUM_BITS);
+}
+
+int protodown_reason_n2a(int id, char *buf, int len)
+{
+	if (id < 0 || id >= PROTODOWN_REASON_NUM_BITS)
+		return -1;
+
+	if (numeric) {
+		snprintf(buf, len, "%d", id);
+		return 0;
+	}
+
+	if (!protodown_reason_init)
+		protodown_reason_initialize();
+
+	if (protodown_reason_tab[id])
+		snprintf(buf, len, "%s", protodown_reason_tab[id]);
+	else
+		snprintf(buf, len, "%d", id);
+
+	return 0;
+}
+
+int protodown_reason_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 (!protodown_reason_init)
+		protodown_reason_initialize();
+
+	for (i = 0; i < PROTODOWN_REASON_NUM_BITS; i++) {
+		if (protodown_reason_tab[i] &&
+		    strcmp(protodown_reason_tab[i], arg) == 0) {
+			cache = protodown_reason_tab[i];
+			res = i;
+			*id = res;
+			return 0;
+		}
+	}
+
+	res = strtoul(arg, &end, 0);
+	if (!end || end == arg || *end || res >= PROTODOWN_REASON_NUM_BITS)
+		return -1;
+	*id = res;
+	return 0;
+}