Adding upstream version 6.8.0.upstream/6.8.0

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

1 files changed, 634 insertions, 0 deletions

diff --git a/ip/iplink_vxlan.c b/ip/iplink_vxlan.c
new file mode 100644
index 0000000..7781d60
--- /dev/null
+++ b/ip/iplink_vxlan.c
@@ -0,0 +1,634 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * iplink_vxlan.c	VXLAN device support
+ *
+ * Authors:     Stephen Hemminger <shemminger@vyatta.com
+ */
+
+#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 const struct vxlan_bool_opt {
+	const char *key;
+	int type;
+	bool default_value;
+} vxlan_opts[] = {
+	{ "external",	IFLA_VXLAN_COLLECT_METADATA,	false },
+	{ "vnifilter",	IFLA_VXLAN_VNIFILTER,		false },
+	{ "learning", 	IFLA_VXLAN_LEARNING,		true },
+	{ "proxy",	IFLA_VXLAN_PROXY,		false },
+	{ "rsc",	IFLA_VXLAN_RSC,			false },
+	{ "l2miss",	IFLA_VXLAN_L2MISS,		false },
+	{ "l3miss",	IFLA_VXLAN_L3MISS,		false },
+	{ "udp_csum",	IFLA_VXLAN_UDP_CSUM,		true },
+	{ "udp_zero_csum6_tx", IFLA_VXLAN_UDP_ZERO_CSUM6_TX, false },
+	{ "udp_zero_csum6_rx", IFLA_VXLAN_UDP_ZERO_CSUM6_RX, false },
+	{ "remcsum_tx", IFLA_VXLAN_REMCSUM_TX,		false },
+	{ "remcsum_rx", IFLA_VXLAN_REMCSUM_RX,		false },
+	{ "localbypass", IFLA_VXLAN_LOCALBYPASS,	true },
+};
+
+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]localbypass ]\n"
+		"		[ [no]external ] [ gbp ] [ gpe ]\n"
+		"		[ [no]vnifilter ]\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;
+	__u8 vnifilter = 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 (strcmp(*argv, "localbypass") == 0) {
+			check_duparg(&attrs, IFLA_VXLAN_LOCALBYPASS,
+				     *argv, *argv);
+			addattr8(n, 1024, IFLA_VXLAN_LOCALBYPASS, 1);
+		} else if (strcmp(*argv, "nolocalbypass") == 0) {
+			check_duparg(&attrs, IFLA_VXLAN_LOCALBYPASS,
+				     *argv, *argv);
+			addattr8(n, 1024, IFLA_VXLAN_LOCALBYPASS, 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 (!strcmp(*argv, "vnifilter")) {
+			check_duparg(&attrs, IFLA_VXLAN_VNIFILTER,
+				     *argv, *argv);
+			addattr8(n, 1024, IFLA_VXLAN_VNIFILTER, 1);
+			vnifilter = 1;
+		} else if (!strcmp(*argv, "novnifilter")) {
+			check_duparg(&attrs, IFLA_VXLAN_VNIFILTER,
+				     *argv, *argv);
+			addattr8(n, 1024, IFLA_VXLAN_VNIFILTER, 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 && vnifilter) {
+		fprintf(stderr, "vxlan: vnifilter is valid only when 'external' is set\n");
+		return -1;
+	}
+
+	if (metadata && VXLAN_ATTRSET(attrs, IFLA_VXLAN_ID)) {
+		fprintf(stderr, "vxlan: both 'external' and vni cannot be specified\n");
+		return -1;
+	}
+
+	if (!metadata && !vnifilter && !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[])
+{
+	unsigned int i;
+	__u8 ttl = 0;
+	__u8 tos = 0;
+	__u32 maxaddr;
+
+	if (!tb)
+		return;
+
+	if (tb[IFLA_VXLAN_ID] &&
+	    RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) >= sizeof(__u32)) {
+		print_uint(PRINT_ANY, "id", "id %u ", rta_getattr_u32(tb[IFLA_VXLAN_ID]));
+	}
+
+	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_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_GBP])
+		print_null(PRINT_ANY, "gbp", "gbp ", NULL);
+	if (tb[IFLA_VXLAN_GPE])
+		print_null(PRINT_ANY, "gpe", "gpe ", NULL);
+
+	for (i = 0; i < ARRAY_SIZE(vxlan_opts); i++) {
+		const struct vxlan_bool_opt *opt = &vxlan_opts[i];
+		__u8 val;
+
+		if (!tb[opt->type])
+			continue;
+		val = rta_getattr_u8(tb[opt->type]);
+
+		print_bool_opt(PRINT_ANY, opt->key, val,
+			       val != opt->default_value || show_details > 1);
+	}
+}
+
+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,
+};