[mirror_iproute2.git] / ip / iplink_geneve.c

/*
 * iplink_geneve.c	GENEVE 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:     John W. Linville <linville@tuxdriver.com>
 */

#include <stdio.h>

#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"

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

static void print_explain(FILE *f)
{
	fprintf(f,
		"Usage: ... geneve id VNI\n"
		"                  remote ADDR\n"
		"                  [ ttl TTL ]\n"
		"                  [ tos TOS ]\n"
		"                  [ flowlabel LABEL ]\n"
		"                  [ dstport PORT ]\n"
		"                  [ [no]external ]\n"
		"                  [ [no]udpcsum ]\n"
		"                  [ [no]udp6zerocsumtx ]\n"
		"                  [ [no]udp6zerocsumrx ]\n"
		"\n"
		"Where: VNI   := 0-16777215\n"
		"       ADDR  := IP_ADDRESS\n"
		"       TOS   := { NUMBER | inherit }\n"
		"       TTL   := { 1..255 | 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 (!GENEVE_ATTRSET(*attrs, type)) {
		*attrs |= (1L << type);
		return;
	}
	duparg2(key, argv);
}

static int geneve_parse_opt(struct link_util *lu, int argc, char **argv,
			  struct nlmsghdr *n)
{
	inet_prefix daddr;
	__u32 vni = 0;
	__u32 label = 0;
	__u8 ttl = 0;
	__u8 tos = 0;
	__u16 dstport = 0;
	bool metadata = 0;
	__u8 udpcsum = 0;
	__u8 udp6zerocsumtx = 0;
	__u8 udp6zerocsumrx = 0;
	__u64 attrs = 0;
	bool set_op = (n->nlmsg_type == RTM_NEWLINK &&
		       !(n->nlmsg_flags & NLM_F_CREATE));

	inet_prefix_reset(&daddr);

	while (argc > 0) {
		if (!matches(*argv, "id") ||
		    !matches(*argv, "vni")) {
			NEXT_ARG();
			check_duparg(&attrs, IFLA_GENEVE_ID, "id", *argv);
			if (get_u32(&vni, *argv, 0) ||
			    vni >= 1u << 24)
				invarg("invalid id", *argv);
		} else if (!matches(*argv, "remote")) {
			NEXT_ARG();
			check_duparg(&attrs, IFLA_GENEVE_REMOTE, "remote",
				     *argv);
			get_addr(&daddr, *argv, AF_UNSPEC);
			if (!is_addrtype_inet_not_multi(&daddr))
				invarg("invalid remote address", *argv);
		} else if (!matches(*argv, "ttl") ||
			   !matches(*argv, "hoplimit")) {
			unsigned int uval;

			NEXT_ARG();
			check_duparg(&attrs, IFLA_GENEVE_TTL, "ttl", *argv);
			if (strcmp(*argv, "inherit") != 0) {
				if (get_unsigned(&uval, *argv, 0))
					invarg("invalid TTL", *argv);
				if (uval > 255)
					invarg("TTL must be <= 255", *argv);
				ttl = uval;
			}
		} else if (!matches(*argv, "tos") ||
			   !matches(*argv, "dsfield")) {
			__u32 uval;

			NEXT_ARG();
			check_duparg(&attrs, IFLA_GENEVE_TOS, "tos", *argv);
			if (strcmp(*argv, "inherit") != 0) {
				if (rtnl_dsfield_a2n(&uval, *argv))
					invarg("bad TOS value", *argv);
				tos = uval;
			} else
				tos = 1;
		} else if (!matches(*argv, "label") ||
			   !matches(*argv, "flowlabel")) {
			__u32 uval;

			NEXT_ARG();
			check_duparg(&attrs, IFLA_GENEVE_LABEL, "flowlabel",
				     *argv);
			if (get_u32(&uval, *argv, 0) ||
			    (uval & ~LABEL_MAX_MASK))
				invarg("invalid flowlabel", *argv);
			label = htonl(uval);
		} else if (!matches(*argv, "dstport")) {
			NEXT_ARG();
			check_duparg(&attrs, IFLA_GENEVE_PORT, "dstport",
				     *argv);
			if (get_u16(&dstport, *argv, 0))
				invarg("dstport", *argv);
		} else if (!matches(*argv, "external")) {
			check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA,
				     *argv, *argv);
			metadata = true;
		} else if (!matches(*argv, "noexternal")) {
			check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA,
				     *argv, *argv);
			metadata = false;
		} else if (!matches(*argv, "udpcsum")) {
			check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv,
				     *argv);
			udpcsum = 1;
		} else if (!matches(*argv, "noudpcsum")) {
			check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv,
				     *argv);
			udpcsum = 0;
		} else if (!matches(*argv, "udp6zerocsumtx")) {
			check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
				     *argv, *argv);
			udp6zerocsumtx = 1;
		} else if (!matches(*argv, "noudp6zerocsumtx")) {
			check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
				     *argv, *argv);
			udp6zerocsumtx = 0;
		} else if (!matches(*argv, "udp6zerocsumrx")) {
			check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
				     *argv, *argv);
			udp6zerocsumrx = 1;
		} else if (!matches(*argv, "noudp6zerocsumrx")) {
			check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
				     *argv, *argv);
			udp6zerocsumrx = 0;
		} else if (matches(*argv, "help") == 0) {
			explain();
			return -1;
		} else {
			fprintf(stderr, "geneve: unknown command \"%s\"?\n", *argv);
			explain();
			return -1;
		}
		argc--, argv++;
	}

	if (metadata && GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) {
		fprintf(stderr, "geneve: both 'external' and vni cannot be specified\n");
		return -1;
	}

	if (!metadata) {
		/* parameter checking make sense only for full geneve tunnels */
		if (!GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) {
			fprintf(stderr, "geneve: missing virtual network identifier\n");
			return -1;
		}

		/* If we are modifying the geneve device, then we only need the
		 * ID (VNI) to identify the geneve device, and we do not need
		 * the remote IP.
		 */
		if (!set_op && !is_addrtype_inet(&daddr)) {
			fprintf(stderr, "geneve: remote link partner not specified\n");
			return -1;
		}
	}

	addattr32(n, 1024, IFLA_GENEVE_ID, vni);
	if (is_addrtype_inet(&daddr)) {
		int type = (daddr.family == AF_INET) ? IFLA_GENEVE_REMOTE :
						       IFLA_GENEVE_REMOTE6;
		addattr_l(n, 1024, type, daddr.data, daddr.bytelen);
	}
	if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_LABEL))
		addattr32(n, 1024, IFLA_GENEVE_LABEL, label);
	if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_TTL))
		addattr8(n, 1024, IFLA_GENEVE_TTL, ttl);
	if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_TOS))
		addattr8(n, 1024, IFLA_GENEVE_TOS, tos);
	if (dstport)
		addattr16(n, 1024, IFLA_GENEVE_PORT, htons(dstport));
	if (metadata)
		addattr(n, 1024, IFLA_GENEVE_COLLECT_METADATA);
	if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_CSUM))
		addattr8(n, 1024, IFLA_GENEVE_UDP_CSUM, udpcsum);
	if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX))
		addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, udp6zerocsumtx);
	if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX))
		addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, udp6zerocsumrx);

	return 0;
}

static void geneve_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	__u32 vni;
	__u8 ttl = 0;
	__u8 tos = 0;

	if (!tb)
		return;

	if (tb[IFLA_GENEVE_COLLECT_METADATA]) {
		print_bool(PRINT_ANY, "external", "external", true);
		return;
	}

	if (!tb[IFLA_GENEVE_ID] ||
	    RTA_PAYLOAD(tb[IFLA_GENEVE_ID]) < sizeof(__u32))
		return;

	vni = rta_getattr_u32(tb[IFLA_GENEVE_ID]);
	print_uint(PRINT_ANY, "id", "id %u ", vni);

	if (tb[IFLA_GENEVE_REMOTE]) {
		__be32 addr = rta_getattr_u32(tb[IFLA_GENEVE_REMOTE]);

		if (addr)
			print_string(PRINT_ANY,
				     "remote",
				     "remote %s ",
				     format_host(AF_INET, 4, &addr));
	} else if (tb[IFLA_GENEVE_REMOTE6]) {
		struct in6_addr addr;

		memcpy(&addr, RTA_DATA(tb[IFLA_GENEVE_REMOTE6]), sizeof(struct in6_addr));
		if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) {
			if (!IN6_IS_ADDR_MULTICAST(&addr))
				print_string(PRINT_ANY,
					     "remote6",
					     "remote %s ",
					     format_host(AF_INET6,
							 sizeof(struct in6_addr),
							 &addr));
		}
	}

	if (tb[IFLA_GENEVE_TTL])
		ttl = rta_getattr_u8(tb[IFLA_GENEVE_TTL]);
	if (is_json_context() || ttl)
		print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
	else
		print_string(PRINT_FP, NULL, "ttl %s ", "inherit");

	if (tb[IFLA_GENEVE_TOS])
		tos = rta_getattr_u8(tb[IFLA_GENEVE_TOS]);
	if (tos) {
		if (is_json_context() || tos != 1)
			print_0xhex(PRINT_ANY, "tos", "tos 0x%x ", tos);
		else
			print_string(PRINT_FP, NULL, "tos %s ", "inherit");
	}

	if (tb[IFLA_GENEVE_LABEL]) {
		__u32 label = rta_getattr_u32(tb[IFLA_GENEVE_LABEL]);

		if (label)
			print_0xhex(PRINT_ANY,
				    "label",
				    "flowlabel %#x ",
				    ntohl(label));
	}

	if (tb[IFLA_GENEVE_PORT])
		print_uint(PRINT_ANY,
			   "port",
			   "dstport %u ",
			   rta_getattr_be16(tb[IFLA_GENEVE_PORT]));

	if (tb[IFLA_GENEVE_UDP_CSUM]) {
		if (is_json_context()) {
			print_bool(PRINT_JSON,
				   "udp_csum",
				   NULL,
				   rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM]));
		} else {
			if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM]))
				fputs("no", f);
			fputs("udpcsum ", f);
		}
	}

	if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) {
		if (is_json_context()) {
			print_bool(PRINT_JSON,
				   "udp_zero_csum6_tx",
				   NULL,
				   rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]));
		} else {
			if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
				fputs("no", f);
			fputs("udp6zerocsumtx ", f);
		}
	}

	if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) {
		if (is_json_context()) {
			print_bool(PRINT_JSON,
				   "udp_zero_csum6_rx",
				   NULL,
				   rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]));
		} else {
			if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
				fputs("no", f);
			fputs("udp6zerocsumrx ", f);
		}
	}
}

static void geneve_print_help(struct link_util *lu, int argc, char **argv,
	FILE *f)
{
	print_explain(f);
}

struct link_util geneve_link_util = {
	.id		= "geneve",
	.maxattr	= IFLA_GENEVE_MAX,
	.parse_opt	= geneve_parse_opt,
	.print_opt	= geneve_print_opt,
	.print_help	= geneve_print_help,
};
Commit	Line	Data
908755dc JL	1	/*
	2	* iplink_geneve.c GENEVE device support
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Authors: John W. Linville <linville@tuxdriver.com>
	10	*/
	11
	12	#include <stdio.h>
	13
f4739b2e	14	#include "rt_names.h"
908755dc JL	15	#include "utils.h"
	16	#include "ip_common.h"
	17
c2a85c3b GM	18	#define GENEVE_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
c2a85c3b GM	19
908755dc JL	20	static void print_explain(FILE *f)
908755dc JL	21	{
8b471354 PS	22	fprintf(f,
	23	"Usage: ... geneve id VNI\n"
	24	" remote ADDR\n"
	25	" [ ttl TTL ]\n"
	26	" [ tos TOS ]\n"
	27	" [ flowlabel LABEL ]\n"
	28	" [ dstport PORT ]\n"
	29	" [ [no]external ]\n"
	30	" [ [no]udpcsum ]\n"
	31	" [ [no]udp6zerocsumtx ]\n"
	32	" [ [no]udp6zerocsumrx ]\n"
	33	"\n"
	34	"Where: VNI := 0-16777215\n"
	35	" ADDR := IP_ADDRESS\n"
	36	" TOS := { NUMBER \| inherit }\n"
	37	" TTL := { 1..255 \| inherit }\n"
	38	" LABEL := 0-1048575\n"
	39	);
908755dc JL	40	}
	41
	42	static void explain(void)
	43	{
	44	print_explain(stderr);
	45	}
	46
c2a85c3b GM	47	static void check_duparg(__u64 attrs, int type, const char key,
	48	const char *argv)
	49	{
	50	if (!GENEVE_ATTRSET(*attrs, type)) {
	51	*attrs \|= (1L << type);
	52	return;
	53	}
	54	duparg2(key, argv);
	55	}
	56
908755dc JL	57	static int geneve_parse_opt(struct link_util lu, int argc, char *argv,
	58	struct nlmsghdr *n)
	59	{
6c4b6727	60	inet_prefix daddr;
908755dc	61	__u32 vni = 0;
29bb2373	62	__u32 label = 0;
f4c05c2e	63	__u8 ttl = 0;
f4739b2e	64	__u8 tos = 0;
9450c5ec PA	65	__u16 dstport = 0;
9450c5ec PA	66	bool metadata = 0;
325d02b4	67	__u8 udpcsum = 0;
325d02b4	68	__u8 udp6zerocsumtx = 0;
325d02b4	69	__u8 udp6zerocsumrx = 0;
c2a85c3b GM	70	__u64 attrs = 0;
	71	bool set_op = (n->nlmsg_type == RTM_NEWLINK &&
	72	!(n->nlmsg_flags & NLM_F_CREATE));
908755dc	73
9cc173d4	74	inet_prefix_reset(&daddr);
6c4b6727	75
908755dc JL	76	while (argc > 0) {
	77	if (!matches(*argv, "id") \|\|
	78	!matches(*argv, "vni")) {
	79	NEXT_ARG();
c2a85c3b	80	check_duparg(&attrs, IFLA_GENEVE_ID, "id", *argv);
908755dc JL	81	if (get_u32(&vni, *argv, 0) \|\|
	82	vni >= 1u << 24)
	83	invarg("invalid id", *argv);
908755dc JL	84	} else if (!matches(*argv, "remote")) {
908755dc JL	85	NEXT_ARG();
c2a85c3b GM	86	check_duparg(&attrs, IFLA_GENEVE_REMOTE, "remote",
c2a85c3b GM	87	*argv);
6c4b6727 SP	88	get_addr(&daddr, *argv, AF_UNSPEC);
6c4b6727 SP	89	if (!is_addrtype_inet_not_multi(&daddr))
908755dc	90	invarg("invalid remote address", *argv);
f4c05c2e JL	91	} else if (!matches(*argv, "ttl") \|\|
f4c05c2e JL	92	!matches(*argv, "hoplimit")) {
56f5daac	93	unsigned int uval;
f4c05c2e JL	94
f4c05c2e JL	95	NEXT_ARG();
c2a85c3b	96	check_duparg(&attrs, IFLA_GENEVE_TTL, "ttl", *argv);
f4c05c2e JL	97	if (strcmp(*argv, "inherit") != 0) {
	98	if (get_unsigned(&uval, *argv, 0))
	99	invarg("invalid TTL", *argv);
	100	if (uval > 255)
	101	invarg("TTL must be <= 255", *argv);
	102	ttl = uval;
	103	}
f4739b2e JL	104	} else if (!matches(*argv, "tos") \|\|
	105	!matches(*argv, "dsfield")) {
	106	__u32 uval;
	107
	108	NEXT_ARG();
c2a85c3b	109	check_duparg(&attrs, IFLA_GENEVE_TOS, "tos", *argv);
f4739b2e JL	110	if (strcmp(*argv, "inherit") != 0) {
	111	if (rtnl_dsfield_a2n(&uval, *argv))
	112	invarg("bad TOS value", *argv);
	113	tos = uval;
	114	} else
	115	tos = 1;
29bb2373 DB	116	} else if (!matches(*argv, "label") \|\|
	117	!matches(*argv, "flowlabel")) {
	118	__u32 uval;
	119
	120	NEXT_ARG();
c2a85c3b GM	121	check_duparg(&attrs, IFLA_GENEVE_LABEL, "flowlabel",
c2a85c3b GM	122	*argv);
29bb2373 DB	123	if (get_u32(&uval, *argv, 0) \|\|
	124	(uval & ~LABEL_MAX_MASK))
	125	invarg("invalid flowlabel", *argv);
	126	label = htonl(uval);
9450c5ec PA	127	} else if (!matches(*argv, "dstport")) {
9450c5ec PA	128	NEXT_ARG();
c2a85c3b GM	129	check_duparg(&attrs, IFLA_GENEVE_PORT, "dstport",
c2a85c3b GM	130	*argv);
9450c5ec PA	131	if (get_u16(&dstport, *argv, 0))
	132	invarg("dstport", *argv);
	133	} else if (!matches(*argv, "external")) {
c2a85c3b GM	134	check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA,
c2a85c3b GM	135	argv, argv);
9450c5ec PA	136	metadata = true;
9450c5ec PA	137	} else if (!matches(*argv, "noexternal")) {
c2a85c3b GM	138	check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA,
c2a85c3b GM	139	argv, argv);
9450c5ec	140	metadata = false;
325d02b4	141	} else if (!matches(*argv, "udpcsum")) {
c2a85c3b GM	142	check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv,
c2a85c3b GM	143	*argv);
325d02b4	144	udpcsum = 1;
325d02b4	145	} else if (!matches(*argv, "noudpcsum")) {
c2a85c3b GM	146	check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv,
c2a85c3b GM	147	*argv);
325d02b4	148	udpcsum = 0;
325d02b4	149	} else if (!matches(*argv, "udp6zerocsumtx")) {
c2a85c3b GM	150	check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
c2a85c3b GM	151	argv, argv);
325d02b4	152	udp6zerocsumtx = 1;
325d02b4	153	} else if (!matches(*argv, "noudp6zerocsumtx")) {
c2a85c3b GM	154	check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX,
c2a85c3b GM	155	argv, argv);
325d02b4	156	udp6zerocsumtx = 0;
325d02b4	157	} else if (!matches(*argv, "udp6zerocsumrx")) {
c2a85c3b GM	158	check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
c2a85c3b GM	159	argv, argv);
325d02b4	160	udp6zerocsumrx = 1;
325d02b4	161	} else if (!matches(*argv, "noudp6zerocsumrx")) {
c2a85c3b GM	162	check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX,
c2a85c3b GM	163	argv, argv);
325d02b4	164	udp6zerocsumrx = 0;
908755dc JL	165	} else if (matches(*argv, "help") == 0) {
	166	explain();
	167	return -1;
	168	} else {
	169	fprintf(stderr, "geneve: unknown command \"%s\"?\n", *argv);
	170	explain();
	171	return -1;
	172	}
	173	argc--, argv++;
	174	}
	175
c2a85c3b	176	if (metadata && GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) {
9450c5ec	177	fprintf(stderr, "geneve: both 'external' and vni cannot be specified\n");
908755dc JL	178	return -1;
	179	}
	180
9450c5ec PA	181	if (!metadata) {
9450c5ec PA	182	/* parameter checking make sense only for full geneve tunnels */
c2a85c3b	183	if (!GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) {
9450c5ec PA	184	fprintf(stderr, "geneve: missing virtual network identifier\n");
	185	return -1;
	186	}
	187
c2a85c3b GM	188	/* If we are modifying the geneve device, then we only need the
	189	* ID (VNI) to identify the geneve device, and we do not need
	190	* the remote IP.
	191	*/
6c4b6727	192	if (!set_op && !is_addrtype_inet(&daddr)) {
9450c5ec PA	193	fprintf(stderr, "geneve: remote link partner not specified\n");
	194	return -1;
	195	}
908755dc JL	196	}
	197
	198	addattr32(n, 1024, IFLA_GENEVE_ID, vni);
6c4b6727 SP	199	if (is_addrtype_inet(&daddr)) {
	200	int type = (daddr.family == AF_INET) ? IFLA_GENEVE_REMOTE :
	201	IFLA_GENEVE_REMOTE6;
f5393225	202	addattr_l(n, 1024, type, daddr.data, daddr.bytelen);
c2a85c3b GM	203	}
	204	if (!set_op \|\| GENEVE_ATTRSET(attrs, IFLA_GENEVE_LABEL))
	205	addattr32(n, 1024, IFLA_GENEVE_LABEL, label);
	206	if (!set_op \|\| GENEVE_ATTRSET(attrs, IFLA_GENEVE_TTL))
	207	addattr8(n, 1024, IFLA_GENEVE_TTL, ttl);
	208	if (!set_op \|\| GENEVE_ATTRSET(attrs, IFLA_GENEVE_TOS))
	209	addattr8(n, 1024, IFLA_GENEVE_TOS, tos);
9450c5ec PA	210	if (dstport)
	211	addattr16(n, 1024, IFLA_GENEVE_PORT, htons(dstport));
	212	if (metadata)
	213	addattr(n, 1024, IFLA_GENEVE_COLLECT_METADATA);
c2a85c3b	214	if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_CSUM))
325d02b4	215	addattr8(n, 1024, IFLA_GENEVE_UDP_CSUM, udpcsum);
c2a85c3b	216	if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX))
325d02b4	217	addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, udp6zerocsumtx);
c2a85c3b	218	if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX))
325d02b4	219	addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, udp6zerocsumrx);
908755dc JL	220
	221	return 0;
	222	}
	223
	224	static void geneve_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	225	{
	226	__u32 vni;
375560c4	227	__u8 ttl = 0;
3caa526c	228	__u8 tos = 0;
908755dc JL	229
	230	if (!tb)
	231	return;
	232
00ff4b8e SP	233	if (tb[IFLA_GENEVE_COLLECT_METADATA]) {
	234	print_bool(PRINT_ANY, "external", "external", true);
	235	return;
	236	}
	237
908755dc JL	238	if (!tb[IFLA_GENEVE_ID] \|\|
	239	RTA_PAYLOAD(tb[IFLA_GENEVE_ID]) < sizeof(__u32))
	240	return;
	241
	242	vni = rta_getattr_u32(tb[IFLA_GENEVE_ID]);
119fae0a	243	print_uint(PRINT_ANY, "id", "id %u ", vni);
908755dc JL	244
	245	if (tb[IFLA_GENEVE_REMOTE]) {
	246	__be32 addr = rta_getattr_u32(tb[IFLA_GENEVE_REMOTE]);
56f5daac	247
908755dc	248	if (addr)
119fae0a JF	249	print_string(PRINT_ANY,
	250	"remote",
	251	"remote %s ",
	252	format_host(AF_INET, 4, &addr));
906ac543 JL	253	} else if (tb[IFLA_GENEVE_REMOTE6]) {
906ac543 JL	254	struct in6_addr addr;
56f5daac	255
906ac543	256	memcpy(&addr, RTA_DATA(tb[IFLA_GENEVE_REMOTE6]), sizeof(struct in6_addr));
1f4c51c0	257	if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) {
2642b6b0	258	if (!IN6_IS_ADDR_MULTICAST(&addr))
119fae0a JF	259	print_string(PRINT_ANY,
	260	"remote6",
	261	"remote %s ",
	262	format_host(AF_INET6,
	263	sizeof(struct in6_addr),
	264	&addr));
906ac543	265	}
908755dc	266	}
f4c05c2e	267
375560c4 SP	268	if (tb[IFLA_GENEVE_TTL])
	269	ttl = rta_getattr_u8(tb[IFLA_GENEVE_TTL]);
	270	if (is_json_context() \|\| ttl)
	271	print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
	272	else
	273	print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
f4739b2e	274
3caa526c SP	275	if (tb[IFLA_GENEVE_TOS])
	276	tos = rta_getattr_u8(tb[IFLA_GENEVE_TOS]);
	277	if (tos) {
	278	if (is_json_context() \|\| tos != 1)
	279	print_0xhex(PRINT_ANY, "tos", "tos 0x%x ", tos);
	280	else
	281	print_string(PRINT_FP, NULL, "tos %s ", "inherit");
f4739b2e	282	}
9450c5ec	283
29bb2373 DB	284	if (tb[IFLA_GENEVE_LABEL]) {
	285	__u32 label = rta_getattr_u32(tb[IFLA_GENEVE_LABEL]);
	286
	287	if (label)
119fae0a JF	288	print_0xhex(PRINT_ANY,
	289	"label",
	290	"flowlabel %#x ",
	291	ntohl(label));
29bb2373 DB	292	}
29bb2373 DB	293
9450c5ec	294	if (tb[IFLA_GENEVE_PORT])
119fae0a JF	295	print_uint(PRINT_ANY,
	296	"port",
	297	"dstport %u ",
	298	rta_getattr_be16(tb[IFLA_GENEVE_PORT]));
9450c5ec	299
325d02b4	300	if (tb[IFLA_GENEVE_UDP_CSUM]) {
119fae0a JF	301	if (is_json_context()) {
	302	print_bool(PRINT_JSON,
	303	"udp_csum",
	304	NULL,
	305	rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM]));
	306	} else {
	307	if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM]))
	308	fputs("no", f);
	309	fputs("udpcsum ", f);
	310	}
325d02b4 JG	311	}
	312
	313	if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) {
119fae0a JF	314	if (is_json_context()) {
	315	print_bool(PRINT_JSON,
	316	"udp_zero_csum6_tx",
	317	NULL,
	318	rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]));
	319	} else {
	320	if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
	321	fputs("no", f);
	322	fputs("udp6zerocsumtx ", f);
	323	}
325d02b4 JG	324	}
	325
	326	if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) {
119fae0a JF	327	if (is_json_context()) {
	328	print_bool(PRINT_JSON,
	329	"udp_zero_csum6_rx",
	330	NULL,
	331	rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]));
	332	} else {
	333	if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
	334	fputs("no", f);
	335	fputs("udp6zerocsumrx ", f);
	336	}
325d02b4	337	}
908755dc JL	338	}
	339
	340	static void geneve_print_help(struct link_util lu, int argc, char *argv,
	341	FILE *f)
	342	{
	343	print_explain(f);
	344	}
	345
	346	struct link_util geneve_link_util = {
	347	.id = "geneve",
	348	.maxattr = IFLA_GENEVE_MAX,
	349	.parse_opt = geneve_parse_opt,
	350	.print_opt = geneve_print_opt,
	351	.print_help = geneve_print_help,
	352	};