/*

 * iplink_vxlan.c	VXLAN device support

 *

 *              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:     Stephen Hemminger 

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <net/if.h>

#include <linux/ip.h>

#include <linux/if_link.h>

#include <arpa/inet.h>

#include "rt_names.h"

#include "utils.h"

#include "ip_common.h"

#define VXLAN_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)

static void print_explain(FILE *f)

{

	fprintf(f,

		"Usage: ... vxlan id VNI\n"

		"		[ { group | remote } IP_ADDRESS ]\n"

		"		[ local ADDR ]\n"

		"		[ ttl TTL ]\n"

		"		[ tos TOS ]\n"

		"		[ df DF ]\n"

		"		[ flowlabel LABEL ]\n"

		"		[ dev PHYS_DEV ]\n"

		"		[ dstport PORT ]\n"

		"		[ srcport MIN MAX ]\n"

		"		[ [no]learning ]\n"

		"		[ [no]proxy ]\n"

		"		[ [no]rsc ]\n"

		"		[ [no]l2miss ]\n"

		"		[ [no]l3miss ]\n"

		"		[ ageing SECONDS ]\n"

		"		[ maxaddress NUMBER ]\n"

		"		[ [no]udpcsum ]\n"

		"		[ [no]udp6zerocsumtx ]\n"

		"		[ [no]udp6zerocsumrx ]\n"

		"		[ [no]remcsumtx ] [ [no]remcsumrx ]\n"

		"		[ [no]external ] [ gbp ] [ gpe ]\n"

		"\n"

		"Where:	VNI	:= 0-16777215\n"

		"	ADDR	:= { IP_ADDRESS | any }\n"

		"	TOS	:= { NUMBER | inherit }\n"

		"	TTL	:= { 1..255 | auto | inherit }\n"

		"	DF	:= { unset | set | inherit }\n"

		"	LABEL := 0-1048575\n"

	);

}

static void explain(void)

{

	print_explain(stderr);

}

static void check_duparg(__u64 *attrs, int type, const char *key,

			 const char *argv)

{

	if (!VXLAN_ATTRSET(*attrs, type)) {

		*attrs |= (1L << type);

		return;

	}

	duparg2(key, argv);

}

static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,

			  struct nlmsghdr *n)

{

	inet_prefix saddr, daddr;

	__u32 vni = 0;

	__u8 learning = 1;

	__u16 dstport = 0;

	__u8 metadata = 0;

	__u64 attrs = 0;

	bool set_op = (n->nlmsg_type == RTM_NEWLINK &&

		       !(n->nlmsg_flags & NLM_F_CREATE));

	bool selected_family = false;

	saddr.family = daddr.family = AF_UNSPEC;

	inet_prefix_reset(&saddr);

	inet_prefix_reset(&daddr);

	while (argc > 0) {

		if (!matches(*argv, "id") ||

		    !matches(*argv, "vni")) {

			/* We will add ID attribute outside of the loop since we

			 * need to consider metadata information as well.

			 */

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_ID, "id", *argv);

			if (get_u32(&vni, *argv, 0) ||

			    vni >= 1u << 24)

				invarg("invalid id", *argv);

		} else if (!matches(*argv, "group")) {

			if (is_addrtype_inet_not_multi(&daddr)) {

				fprintf(stderr, "vxlan: both group and remote");

				fprintf(stderr, " cannot be specified\n");

				return -1;

			}

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_GROUP, "group", *argv);

			get_addr(&daddr, *argv, saddr.family);

			if (!is_addrtype_inet_multi(&daddr))

				invarg("invalid group address", *argv);

		} else if (!matches(*argv, "remote")) {

			if (is_addrtype_inet_multi(&daddr)) {

				fprintf(stderr, "vxlan: both group and remote");

				fprintf(stderr, " cannot be specified\n");

				return -1;

			}

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_GROUP, "remote", *argv);

			get_addr(&daddr, *argv, saddr.family);

			if (!is_addrtype_inet_not_multi(&daddr))

				invarg("invalid remote address", *argv);

		} else if (!matches(*argv, "local")) {

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_LOCAL, "local", *argv);

			get_addr(&saddr, *argv, daddr.family);

			if (!is_addrtype_inet_not_multi(&saddr))

				invarg("invalid local address", *argv);

		} else if (!matches(*argv, "dev")) {

			unsigned int link;

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_LINK, "dev", *argv);

			link = ll_name_to_index(*argv);

			if (!link)

				exit(nodev(*argv));

			addattr32(n, 1024, IFLA_VXLAN_LINK, link);

		} else if (!matches(*argv, "ttl") ||

			   !matches(*argv, "hoplimit")) {

			unsigned int uval;

			__u8 ttl = 0;

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_TTL, "ttl", *argv);

			if (strcmp(*argv, "inherit") == 0) {

				addattr(n, 1024, IFLA_VXLAN_TTL_INHERIT);

			} else if (strcmp(*argv, "auto") == 0) {

				addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);

			} else {

				if (get_unsigned(&uval, *argv, 0))

					invarg("invalid TTL", *argv);

				if (uval > 255)

					invarg("TTL must be <= 255", *argv);

				ttl = uval;

				addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);

			}

		} else if (!matches(*argv, "tos") ||

			   !matches(*argv, "dsfield")) {

			__u32 uval;

			__u8 tos;

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_TOS, "tos", *argv);

			if (strcmp(*argv, "inherit") != 0) {

				if (rtnl_dsfield_a2n(&uval, *argv))

					invarg("bad TOS value", *argv);

				tos = uval;

			} else

				tos = 1;

			addattr8(n, 1024, IFLA_VXLAN_TOS, tos);

		} else if (!matches(*argv, "df")) {

			enum ifla_vxlan_df df;

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_DF, "df", *argv);

			if (strcmp(*argv, "unset") == 0)

				df = VXLAN_DF_UNSET;

			else if (strcmp(*argv, "set") == 0)

				df = VXLAN_DF_SET;

			else if (strcmp(*argv, "inherit") == 0)

				df = VXLAN_DF_INHERIT;

			else

				invarg("DF must be 'unset', 'set' or 'inherit'",

				       *argv);

			addattr8(n, 1024, IFLA_VXLAN_DF, df);

		} else if (!matches(*argv, "label") ||

			   !matches(*argv, "flowlabel")) {

			__u32 uval;

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_LABEL, "flowlabel",

				     *argv);

			if (get_u32(&uval, *argv, 0) ||

			    (uval & ~LABEL_MAX_MASK))

				invarg("invalid flowlabel", *argv);

			addattr32(n, 1024, IFLA_VXLAN_LABEL, htonl(uval));

		} else if (!matches(*argv, "ageing")) {

			__u32 age;

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_AGEING, "ageing",

				     *argv);

			if (strcmp(*argv, "none") == 0)

				age = 0;

			else if (get_u32(&age, *argv, 0))

				invarg("ageing timer", *argv);

			addattr32(n, 1024, IFLA_VXLAN_AGEING, age);

		} else if (!matches(*argv, "maxaddress")) {

			__u32 maxaddr;

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_LIMIT,

				     "maxaddress", *argv);

			if (strcmp(*argv, "unlimited") == 0)

				maxaddr = 0;

			else if (get_u32(&maxaddr, *argv, 0))

				invarg("max addresses", *argv);

			addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr);

		} else if (!matches(*argv, "port") ||

			   !matches(*argv, "srcport")) {

			struct ifla_vxlan_port_range range = { 0, 0 };

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_PORT_RANGE, "srcport",

				     *argv);

			if (get_be16(&range.low, *argv, 0))

				invarg("min port", *argv);

			NEXT_ARG();

			if (get_be16(&range.high, *argv, 0))

				invarg("max port", *argv);

			if (range.low || range.high) {

				addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE,

					  &range, sizeof(range));

			}

		} else if (!matches(*argv, "dstport")) {

			NEXT_ARG();

			check_duparg(&attrs, IFLA_VXLAN_PORT, "dstport", *argv);

			if (get_u16(&dstport, *argv, 0))

				invarg("dst port", *argv);

		} else if (!matches(*argv, "nolearning")) {

			check_duparg(&attrs, IFLA_VXLAN_LEARNING, *argv, *argv);

			learning = 0;

		} else if (!matches(*argv, "learning")) {

			check_duparg(&attrs, IFLA_VXLAN_LEARNING, *argv, *argv);

			learning = 1;

		} else if (!matches(*argv, "noproxy")) {

			check_duparg(&attrs, IFLA_VXLAN_PROXY, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_PROXY, 0);

		} else if (!matches(*argv, "proxy")) {

			check_duparg(&attrs, IFLA_VXLAN_PROXY, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_PROXY, 1);

		} else if (!matches(*argv, "norsc")) {

			check_duparg(&attrs, IFLA_VXLAN_RSC, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_RSC, 0);

		} else if (!matches(*argv, "rsc")) {

			check_duparg(&attrs, IFLA_VXLAN_RSC, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_RSC, 1);

		} else if (!matches(*argv, "nol2miss")) {

			check_duparg(&attrs, IFLA_VXLAN_L2MISS, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_L2MISS, 0);

		} else if (!matches(*argv, "l2miss")) {

			check_duparg(&attrs, IFLA_VXLAN_L2MISS, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_L2MISS, 1);

		} else if (!matches(*argv, "nol3miss")) {

			check_duparg(&attrs, IFLA_VXLAN_L3MISS, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_L3MISS, 0);

		} else if (!matches(*argv, "l3miss")) {

			check_duparg(&attrs, IFLA_VXLAN_L3MISS, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_L3MISS, 1);

		} else if (!matches(*argv, "udpcsum")) {

			check_duparg(&attrs, IFLA_VXLAN_UDP_CSUM, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, 1);

		} else if (!matches(*argv, "noudpcsum")) {

			check_duparg(&attrs, IFLA_VXLAN_UDP_CSUM, *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, 0);

		} else if (!matches(*argv, "udp6zerocsumtx")) {

			check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, 1);

		} else if (!matches(*argv, "noudp6zerocsumtx")) {

			check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_TX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, 0);

		} else if (!matches(*argv, "udp6zerocsumrx")) {

			check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, 1);

		} else if (!matches(*argv, "noudp6zerocsumrx")) {

			check_duparg(&attrs, IFLA_VXLAN_UDP_ZERO_CSUM6_RX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, 0);

		} else if (!matches(*argv, "remcsumtx")) {

			check_duparg(&attrs, IFLA_VXLAN_REMCSUM_TX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, 1);

		} else if (!matches(*argv, "noremcsumtx")) {

			check_duparg(&attrs, IFLA_VXLAN_REMCSUM_TX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, 0);

		} else if (!matches(*argv, "remcsumrx")) {

			check_duparg(&attrs, IFLA_VXLAN_REMCSUM_RX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, 1);

		} else if (!matches(*argv, "noremcsumrx")) {

			check_duparg(&attrs, IFLA_VXLAN_REMCSUM_RX,

				     *argv, *argv);

			addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, 0);

		} else if (!matches(*argv, "external")) {

			check_duparg(&attrs, IFLA_VXLAN_COLLECT_METADATA,

				     *argv, *argv);

			metadata = 1;

			learning = 0;

			/* we will add LEARNING attribute outside of the loop */

			addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA,

				 metadata);

		} else if (!matches(*argv, "noexternal")) {

			check_duparg(&attrs, IFLA_VXLAN_COLLECT_METADATA,

				     *argv, *argv);

			metadata = 0;

			addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA,

				 metadata);

		} else if (!matches(*argv, "gbp")) {

			check_duparg(&attrs, IFLA_VXLAN_GBP, *argv, *argv);

			addattr_l(n, 1024, IFLA_VXLAN_GBP, NULL, 0);

		} else if (!matches(*argv, "gpe")) {

			check_duparg(&attrs, IFLA_VXLAN_GPE, *argv, *argv);

			addattr_l(n, 1024, IFLA_VXLAN_GPE, NULL, 0);

		} else if (matches(*argv, "help") == 0) {

			explain();

			return -1;

		} else {

			fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv);

			explain();

			return -1;

		}

		argc--, argv++;

	}

	if (metadata && VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID)) {

		fprintf(stderr, "vxlan: both 'external' and vni cannot be specified\n");

		return -1;

	}

	if (!metadata && !VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID) && !set_op) {

		fprintf(stderr, "vxlan: missing virtual network identifier\n");

		return -1;

	}

	if (is_addrtype_inet_multi(&daddr) &&

	    !VXLAN_ATTRSET(attrs, IFLA_VXLAN_LINK)) {

		fprintf(stderr, "vxlan: 'group' requires 'dev' to be specified\n");

		return -1;

	}

	if (!VXLAN_ATTRSET(attrs, IFLA_VXLAN_PORT) &&

	    VXLAN_ATTRSET(attrs, IFLA_VXLAN_GPE)) {

		dstport = 4790;

	} else if (!VXLAN_ATTRSET(attrs, IFLA_VXLAN_PORT) && !set_op) {

		fprintf(stderr, "vxlan: destination port not specified\n"

			"Will use Linux kernel default (non-standard value)\n");

		fprintf(stderr,

			"Use 'dstport 4789' to get the IANA assigned value\n"

			"Use 'dstport 0' to get default and quiet this message\n");

	}

	if (VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID))

		addattr32(n, 1024, IFLA_VXLAN_ID, vni);

	if (is_addrtype_inet(&saddr)) {

		int type = (saddr.family == AF_INET) ? IFLA_VXLAN_LOCAL

						     : IFLA_VXLAN_LOCAL6;

		addattr_l(n, 1024, type, saddr.data, saddr.bytelen);

		selected_family = true;

	}

	if (is_addrtype_inet(&daddr)) {

		int type = (daddr.family == AF_INET) ? IFLA_VXLAN_GROUP

						     : IFLA_VXLAN_GROUP6;

		addattr_l(n, 1024, type, daddr.data, daddr.bytelen);

		selected_family = true;

	}

	if (!selected_family) {

		if (preferred_family == AF_INET) {

			get_addr(&daddr, "default", AF_INET);

			addattr_l(n, 1024, IFLA_VXLAN_GROUP,

				  daddr.data, daddr.bytelen);

		} else if (preferred_family == AF_INET6) {

			get_addr(&daddr, "default", AF_INET6);

			addattr_l(n, 1024, IFLA_VXLAN_GROUP6,

				  daddr.data, daddr.bytelen);

		}

	}

	if (!set_op || VXLAN_ATTRSET(attrs, IFLA_VXLAN_LEARNING))

		addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning);

	if (dstport)

		addattr16(n, 1024, IFLA_VXLAN_PORT, htons(dstport));

	return 0;

}

static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])

{

	__u32 vni;

	__u8 ttl = 0;

	__u8 tos = 0;

	__u32 maxaddr;

	if (!tb)

		return;

	if (tb[IFLA_VXLAN_COLLECT_METADATA] &&

	    rta_getattr_u8(tb[IFLA_VXLAN_COLLECT_METADATA])) {

		print_bool(PRINT_ANY, "external", "external ", true);

		return;

	}

	if (!tb[IFLA_VXLAN_ID] ||

	    RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32))

		return;

	vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]);

	print_uint(PRINT_ANY, "id", "id %u ", vni);

	if (tb[IFLA_VXLAN_GROUP]) {

		__be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]);

		if (addr) {

			if (IN_MULTICAST(ntohl(addr)))

				print_string(PRINT_ANY,

					     "group",

					     "group %s ",

					     format_host(AF_INET, 4, &addr));

			else

				print_string(PRINT_ANY,

					     "remote",

					     "remote %s ",

					     format_host(AF_INET, 4, &addr));

		}

	} else if (tb[IFLA_VXLAN_GROUP6]) {

		struct in6_addr addr;

		memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_GROUP6]), sizeof(struct in6_addr));

		if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) {

			if (IN6_IS_ADDR_MULTICAST(&addr))

				print_string(PRINT_ANY,

					     "group6",

					     "group %s ",

					     format_host(AF_INET6,

							 sizeof(struct in6_addr),

							 &addr));

			else

				print_string(PRINT_ANY,

					     "remote6",

					     "remote %s ",

					     format_host(AF_INET6,

							 sizeof(struct in6_addr),

							 &addr));

		}

	}

	if (tb[IFLA_VXLAN_LOCAL]) {

		__be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]);

		if (addr)

			print_string(PRINT_ANY,

				     "local",

				     "local %s ",

				     format_host(AF_INET, 4, &addr));

	} else if (tb[IFLA_VXLAN_LOCAL6]) {

		struct in6_addr addr;

		memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr));

		if (!IN6_IS_ADDR_UNSPECIFIED(&addr))

			print_string(PRINT_ANY,

				     "local6",

				     "local %s ",

				     format_host(AF_INET6,

						 sizeof(struct in6_addr),

						 &addr));

	}

	if (tb[IFLA_VXLAN_LINK]) {

		unsigned int link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]);

		if (link) {

			print_string(PRINT_ANY, "link", "dev %s ",

				     ll_index_to_name(link));

		}

	}

	if (tb[IFLA_VXLAN_PORT_RANGE]) {

		const struct ifla_vxlan_port_range *r

			= RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]);

		if (is_json_context()) {

			open_json_object("port_range");

			print_uint(PRINT_JSON, "low", NULL, ntohs(r->low));

			print_uint(PRINT_JSON, "high", NULL, ntohs(r->high));

			close_json_object();

		} else {

			fprintf(f, "srcport %u %u ",

				ntohs(r->low), ntohs(r->high));

		}

	}

	if (tb[IFLA_VXLAN_PORT])

		print_uint(PRINT_ANY,

			   "port",

			   "dstport %u ",

			   rta_getattr_be16(tb[IFLA_VXLAN_PORT]));

	if (tb[IFLA_VXLAN_LEARNING]) {

		__u8 learning = rta_getattr_u8(tb[IFLA_VXLAN_LEARNING]);

		print_bool(PRINT_JSON, "learning", NULL, learning);

		if (!learning)

			print_bool(PRINT_FP, NULL, "nolearning ", true);

	}

	if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY]))

		print_bool(PRINT_ANY, "proxy", "proxy ", true);

	if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC]))

		print_bool(PRINT_ANY, "rsc", "rsc ", true);

	if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS]))

		print_bool(PRINT_ANY, "l2miss", "l2miss ", true);

	if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS]))

		print_bool(PRINT_ANY, "l3miss", "l3miss ", true);

	if (tb[IFLA_VXLAN_TOS])

		tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]);

	if (tos) {

		if (is_json_context() || tos != 1)

			print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos);

		else

			print_string(PRINT_FP, NULL, "tos %s ", "inherit");

	}

	if (tb[IFLA_VXLAN_TTL_INHERIT] &&

	    rta_getattr_u8(tb[IFLA_VXLAN_TTL_INHERIT])) {

		print_string(PRINT_FP, NULL, "ttl %s ", "inherit");

	} else if (tb[IFLA_VXLAN_TTL]) {

		ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]);

		if (is_json_context() || ttl)

			print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);

		else

			print_string(PRINT_FP, NULL, "ttl %s ", "auto");

	}

	if (tb[IFLA_VXLAN_DF]) {

		enum ifla_vxlan_df df = rta_getattr_u8(tb[IFLA_VXLAN_DF]);

		if (df == VXLAN_DF_UNSET)

			print_string(PRINT_JSON, "df", "df %s ", "unset");

		else if (df == VXLAN_DF_SET)

			print_string(PRINT_ANY, "df", "df %s ", "set");

		else if (df == VXLAN_DF_INHERIT)

			print_string(PRINT_ANY, "df", "df %s ", "inherit");

	}

	if (tb[IFLA_VXLAN_LABEL]) {

		__u32 label = rta_getattr_u32(tb[IFLA_VXLAN_LABEL]);

		if (label)

			print_0xhex(PRINT_ANY, "label",

				    "flowlabel %#llx ", ntohl(label));

	}

	if (tb[IFLA_VXLAN_AGEING]) {

		__u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]);

		if (age == 0)

			print_uint(PRINT_ANY, "ageing", "ageing none ", 0);

		else

			print_uint(PRINT_ANY, "ageing", "ageing %u ", age);

	}

	if (tb[IFLA_VXLAN_LIMIT] &&

	    ((maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT])) != 0))

		print_uint(PRINT_ANY, "limit", "maxaddr %u ", maxaddr);

	if (tb[IFLA_VXLAN_UDP_CSUM]) {

		__u8 udp_csum = rta_getattr_u8(tb[IFLA_VXLAN_UDP_CSUM]);

		if (is_json_context()) {

			print_bool(PRINT_ANY, "udp_csum", NULL, udp_csum);

		} else {

			if (!udp_csum)

				fputs("no", f);

			fputs("udpcsum ", f);

		}

	}

	if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {

		__u8 csum6 = rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]);

		if (is_json_context()) {

			print_bool(PRINT_ANY,

				   "udp_zero_csum6_tx", NULL, csum6);

		} else {

			if (!csum6)

				fputs("no", f);

			fputs("udp6zerocsumtx ", f);

		}

	}

	if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {

		__u8 csum6 = rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]);

		if (is_json_context()) {

			print_bool(PRINT_ANY,

				   "udp_zero_csum6_rx",

				   NULL,

				   csum6);

		} else {

			if (!csum6)

				fputs("no", f);

			fputs("udp6zerocsumrx ", f);

		}

	}

	if (tb[IFLA_VXLAN_REMCSUM_TX] &&

	    rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_TX]))

		print_bool(PRINT_ANY, "remcsum_tx", "remcsumtx ", true);

	if (tb[IFLA_VXLAN_REMCSUM_RX] &&

	    rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_RX]))

		print_bool(PRINT_ANY, "remcsum_rx", "remcsumrx ", true);

	if (tb[IFLA_VXLAN_GBP])

		print_bool(PRINT_ANY, "gbp", "gbp ", true);

	if (tb[IFLA_VXLAN_GPE])

		print_bool(PRINT_ANY, "gpe", "gpe ", true);

}

static void vxlan_print_help(struct link_util *lu, int argc, char **argv,

			     FILE *f)

{

	print_explain(f);

}

struct link_util vxlan_link_util = {

	.id		= "vxlan",

	.maxattr	= IFLA_VXLAN_MAX,

	.parse_opt	= vxlan_parse_opt,

	.print_opt	= vxlan_print_opt,

	.print_help	= vxlan_print_help,

};