[mirror_iproute2.git] / ip / link_gre.c

/*
 * link_gre.c	gre driver module
 *
 *		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:	Herbert Xu <herbert@gondor.apana.org.au>
 *
 */

#include <string.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#include <linux/ip.h>
#include <linux/if_tunnel.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "tunnel.h"

static void gre_print_help(struct link_util *lu, int argc, char **argv, FILE *f)
{
	fprintf(f,
		"Usage: ... %-9s	[ remote ADDR ]\n"
		"			[ local ADDR ]\n"
		"			[ [no][i|o]seq ]\n"
		"			[ [i|o]key KEY | no[i|o]key ]\n"
		"			[ [no][i|o]csum ]\n"
		"			[ ttl TTL ]\n"
		"			[ tos TOS ]\n"
		"			[ [no]pmtudisc ]\n"
		"			[ [no]ignore-df ]\n"
		"			[ dev PHYS_DEV ]\n"
		"			[ fwmark MARK ]\n"
		"			[ external ]\n"
		"			[ noencap ]\n"
		"			[ encap { fou | gue | none } ]\n"
		"			[ encap-sport PORT ]\n"
		"			[ encap-dport PORT ]\n"
		"			[ [no]encap-csum ]\n"
		"			[ [no]encap-csum6 ]\n"
		"			[ [no]encap-remcsum ]\n"
		"			[ erspan_ver version ]\n"
		"			[ erspan IDX ]\n"
		"			[ erspan_dir { ingress | egress } ]\n"
		"			[ erspan_hwid hwid ]\n"
		"\n"
		"Where:	ADDR := { IP_ADDRESS | any }\n"
		"	TOS  := { NUMBER | inherit }\n"
		"	TTL  := { 1..255 | inherit }\n"
		"	KEY  := { DOTTED_QUAD | NUMBER }\n"
		"	MARK := { 0x0..0xffffffff }\n",
		lu->id);
}

static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
			 struct nlmsghdr *n)
{
	struct ifinfomsg *ifi = NLMSG_DATA(n);
	struct {
		struct nlmsghdr n;
		struct ifinfomsg i;
	} req = {
		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
		.n.nlmsg_flags = NLM_F_REQUEST,
		.n.nlmsg_type = RTM_GETLINK,
		.i.ifi_family = preferred_family,
		.i.ifi_index = ifi->ifi_index,
	};
	struct nlmsghdr *answer;
	struct rtattr *tb[IFLA_MAX + 1];
	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
	int len;
	__u16 iflags = 0;
	__u16 oflags = 0;
	__be32 ikey = 0;
	__be32 okey = 0;
	inet_prefix saddr, daddr;
	__u8 pmtudisc = 1;
	__u8 ignore_df = 0;
	__u8 tos = 0;
	__u8 ttl = 0;
	__u32 link = 0;
	__u16 encaptype = 0;
	__u16 encapflags = 0;
	__u16 encapsport = 0;
	__u16 encapdport = 0;
	__u8 metadata = 0;
	__u32 fwmark = 0;
	__u32 erspan_idx = 0;
	__u8 erspan_ver = 0;
	__u8 erspan_dir = 0;
	__u16 erspan_hwid = 0;

	inet_prefix_reset(&saddr);
	inet_prefix_reset(&daddr);

	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
		const struct rtattr *rta;

		if (rtnl_talk(&rth, &req.n, &answer) < 0) {
get_failed:
			fprintf(stderr,
				"Failed to get existing tunnel info.\n");
			return -1;
		}

		len = answer->nlmsg_len;
		len -= NLMSG_LENGTH(sizeof(*ifi));
		if (len < 0)
			goto get_failed;

		parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);

		if (!tb[IFLA_LINKINFO])
			goto get_failed;

		parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);

		if (!linkinfo[IFLA_INFO_DATA])
			goto get_failed;

		parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
				    linkinfo[IFLA_INFO_DATA]);

		rta = greinfo[IFLA_GRE_LOCAL];
		if (rta && get_addr_rta(&saddr, rta, AF_INET))
			goto get_failed;

		rta = greinfo[IFLA_GRE_REMOTE];
		if (rta && get_addr_rta(&daddr, rta, AF_INET))
			goto get_failed;

		if (greinfo[IFLA_GRE_IKEY])
			ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);

		if (greinfo[IFLA_GRE_OKEY])
			okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);

		if (greinfo[IFLA_GRE_IFLAGS])
			iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);

		if (greinfo[IFLA_GRE_OFLAGS])
			oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);

		if (greinfo[IFLA_GRE_PMTUDISC])
			pmtudisc = rta_getattr_u8(
				greinfo[IFLA_GRE_PMTUDISC]);

		if (greinfo[IFLA_GRE_IGNORE_DF])
			ignore_df =
				!!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]);

		if (greinfo[IFLA_GRE_TOS])
			tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]);

		if (greinfo[IFLA_GRE_TTL])
			ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);

		if (greinfo[IFLA_GRE_LINK])
			link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);

		if (greinfo[IFLA_GRE_ENCAP_TYPE])
			encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);

		if (greinfo[IFLA_GRE_ENCAP_FLAGS])
			encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);

		if (greinfo[IFLA_GRE_ENCAP_SPORT])
			encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);

		if (greinfo[IFLA_GRE_ENCAP_DPORT])
			encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);

		if (greinfo[IFLA_GRE_COLLECT_METADATA])
			metadata = 1;

		if (greinfo[IFLA_GRE_FWMARK])
			fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);

		if (greinfo[IFLA_GRE_ERSPAN_INDEX])
			erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);

		if (greinfo[IFLA_GRE_ERSPAN_VER])
			erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);

		if (greinfo[IFLA_GRE_ERSPAN_DIR])
			erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);

		if (greinfo[IFLA_GRE_ERSPAN_HWID])
			erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);

		free(answer);
	}

	while (argc > 0) {
		if (!matches(*argv, "key")) {
			NEXT_ARG();
			iflags |= GRE_KEY;
			oflags |= GRE_KEY;
			ikey = okey = tnl_parse_key("key", *argv);
		} else if (!matches(*argv, "nokey")) {
			iflags &= ~GRE_KEY;
			oflags &= ~GRE_KEY;
			ikey = okey = 0;
		} else if (!matches(*argv, "ikey")) {
			NEXT_ARG();
			iflags |= GRE_KEY;
			ikey = tnl_parse_key("ikey", *argv);
		} else if (!matches(*argv, "noikey")) {
			iflags &= ~GRE_KEY;
			ikey = 0;
		} else if (!matches(*argv, "okey")) {
			NEXT_ARG();
			oflags |= GRE_KEY;
			okey = tnl_parse_key("okey", *argv);
		} else if (!matches(*argv, "nookey")) {
			oflags &= ~GRE_KEY;
			okey = 0;
		} else if (!matches(*argv, "seq")) {
			iflags |= GRE_SEQ;
			oflags |= GRE_SEQ;
		} else if (!matches(*argv, "noseq")) {
			iflags &= ~GRE_SEQ;
			oflags &= ~GRE_SEQ;
		} else if (!matches(*argv, "iseq")) {
			iflags |= GRE_SEQ;
		} else if (!matches(*argv, "noiseq")) {
			iflags &= ~GRE_SEQ;
		} else if (!matches(*argv, "oseq")) {
			oflags |= GRE_SEQ;
		} else if (!matches(*argv, "nooseq")) {
			oflags &= ~GRE_SEQ;
		} else if (!matches(*argv, "csum")) {
			iflags |= GRE_CSUM;
			oflags |= GRE_CSUM;
		} else if (!matches(*argv, "nocsum")) {
			iflags &= ~GRE_CSUM;
			oflags &= ~GRE_CSUM;
		} else if (!matches(*argv, "icsum")) {
			iflags |= GRE_CSUM;
		} else if (!matches(*argv, "noicsum")) {
			iflags &= ~GRE_CSUM;
		} else if (!matches(*argv, "ocsum")) {
			oflags |= GRE_CSUM;
		} else if (!matches(*argv, "noocsum")) {
			oflags &= ~GRE_CSUM;
		} else if (!matches(*argv, "nopmtudisc")) {
			pmtudisc = 0;
		} else if (!matches(*argv, "pmtudisc")) {
			pmtudisc = 1;
		} else if (!matches(*argv, "remote")) {
			NEXT_ARG();
			get_addr(&daddr, *argv, AF_INET);
		} else if (!matches(*argv, "local")) {
			NEXT_ARG();
			get_addr(&saddr, *argv, AF_INET);
		} else if (!matches(*argv, "dev")) {
			NEXT_ARG();
			link = ll_name_to_index(*argv);
			if (!link)
				exit(nodev(*argv));
		} else if (!matches(*argv, "ttl") ||
			   !matches(*argv, "hoplimit") ||
			   !matches(*argv, "hlim")) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (get_u8(&ttl, *argv, 0))
					invarg("invalid TTL\n", *argv);
			} else
				ttl = 0;
		} else if (!matches(*argv, "tos") ||
			   !matches(*argv, "tclass") ||
			   !matches(*argv, "dsfield")) {
			__u32 uval;

			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (rtnl_dsfield_a2n(&uval, *argv))
					invarg("bad TOS value", *argv);
				tos = uval;
			} else
				tos = 1;
		} else if (strcmp(*argv, "noencap") == 0) {
			encaptype = TUNNEL_ENCAP_NONE;
		} else if (strcmp(*argv, "encap") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "fou") == 0)
				encaptype = TUNNEL_ENCAP_FOU;
			else if (strcmp(*argv, "gue") == 0)
				encaptype = TUNNEL_ENCAP_GUE;
			else if (strcmp(*argv, "none") == 0)
				encaptype = TUNNEL_ENCAP_NONE;
			else
				invarg("Invalid encap type.", *argv);
		} else if (strcmp(*argv, "encap-sport") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "auto") == 0)
				encapsport = 0;
			else if (get_u16(&encapsport, *argv, 0))
				invarg("Invalid source port.", *argv);
		} else if (strcmp(*argv, "encap-dport") == 0) {
			NEXT_ARG();
			if (get_u16(&encapdport, *argv, 0))
				invarg("Invalid destination port.", *argv);
		} else if (strcmp(*argv, "encap-csum") == 0) {
			encapflags |= TUNNEL_ENCAP_FLAG_CSUM;
		} else if (strcmp(*argv, "noencap-csum") == 0) {
			encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
		} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
			encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
		} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
			encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
		} else if (strcmp(*argv, "encap-remcsum") == 0) {
			encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
		} else if (strcmp(*argv, "noencap-remcsum") == 0) {
			encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
		} else if (strcmp(*argv, "external") == 0) {
			metadata = 1;
		} else if (strcmp(*argv, "ignore-df") == 0) {
			ignore_df = 1;
		} else if (strcmp(*argv, "noignore-df") == 0) {
			/*
			 *only the lsb is significant, use 2 for presence
			 */
			ignore_df = 2;
		} else if (strcmp(*argv, "fwmark") == 0) {
			NEXT_ARG();
			if (get_u32(&fwmark, *argv, 0))
				invarg("invalid fwmark\n", *argv);
		} else if (strcmp(*argv, "erspan") == 0) {
			NEXT_ARG();
			if (get_u32(&erspan_idx, *argv, 0))
				invarg("invalid erspan index\n", *argv);
			if (erspan_idx & ~((1<<20) - 1) || erspan_idx == 0)
				invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
		} else if (strcmp(*argv, "erspan_ver") == 0) {
			NEXT_ARG();
			if (get_u8(&erspan_ver, *argv, 0))
				invarg("invalid erspan version\n", *argv);
			if (erspan_ver != 1 && erspan_ver != 2)
				invarg("erspan version must be 1 or 2\n", *argv);
		} else if (strcmp(*argv, "erspan_dir") == 0) {
			NEXT_ARG();
			if (matches(*argv, "ingress") == 0)
				erspan_dir = 0;
			else if (matches(*argv, "egress") == 0)
				erspan_dir = 1;
			else
				invarg("Invalid erspan direction.", *argv);
		} else if (strcmp(*argv, "erspan_hwid") == 0) {
			NEXT_ARG();
			if (get_u16(&erspan_hwid, *argv, 0))
				invarg("invalid erspan hwid\n", *argv);
		} else {
			gre_print_help(lu, argc, argv, stderr);
			return -1;
		}
		argc--; argv++;
	}

	if (is_addrtype_inet_multi(&daddr)) {
		if (!ikey) {
			ikey = daddr.data[0];
			iflags |= GRE_KEY;
		}
		if (!okey) {
			okey = daddr.data[0];
			oflags |= GRE_KEY;
		}
		if (!is_addrtype_inet_not_unspec(&saddr)) {
			fprintf(stderr,
				"A broadcast tunnel requires a source address.\n");
			return -1;
		}
	}

	if (metadata) {
		addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
		return 0;
	}

	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	if (is_addrtype_inet_not_unspec(&saddr))
		addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
	if (is_addrtype_inet_not_unspec(&daddr))
		addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
	if (ignore_df)
		addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);
	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
	if (link)
		addattr32(n, 1024, IFLA_GRE_LINK, link);
	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
	if (erspan_ver) {
		addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
		if (erspan_ver == 1 && erspan_idx != 0) {
			addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
		} else if (erspan_ver == 2) {
			addattr8(n, 1024, IFLA_GRE_ERSPAN_DIR, erspan_dir);
			addattr16(n, 1024, IFLA_GRE_ERSPAN_HWID, erspan_hwid);
		}
	}
	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));

	return 0;
}

static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	char s2[64];
	__u16 iflags = 0;
	__u16 oflags = 0;
	__u8 ttl = 0;
	__u8 tos = 0;

	if (!tb)
		return;

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

	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET);
	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET);

	if (tb[IFLA_GRE_LINK]) {
		__u32 link = rta_getattr_u32(tb[IFLA_GRE_LINK]);

		if (link) {
			print_string(PRINT_ANY, "link", "dev %s ",
				     ll_index_to_name(link));
		}
	}

	if (tb[IFLA_GRE_TTL])
		ttl = rta_getattr_u8(tb[IFLA_GRE_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_GRE_TOS])
		tos = rta_getattr_u8(tb[IFLA_GRE_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_GRE_PMTUDISC]) {
		if (!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
			print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
		else
			print_bool(PRINT_JSON, "pmtudisc", NULL, true);
	}

	if (tb[IFLA_GRE_IGNORE_DF] && rta_getattr_u8(tb[IFLA_GRE_IGNORE_DF]))
		print_bool(PRINT_ANY, "ignore_df", "ignore-df ", true);

	if (tb[IFLA_GRE_IFLAGS])
		iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);

	if (tb[IFLA_GRE_OFLAGS])
		oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);

	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
		inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
		print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
	}

	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
		inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
		print_string(PRINT_ANY, "okey", "okey %s ", s2);
	}

	if (iflags & GRE_SEQ)
		print_bool(PRINT_ANY, "iseq", "iseq ", true);
	if (oflags & GRE_SEQ)
		print_bool(PRINT_ANY, "oseq", "oseq ", true);
	if (iflags & GRE_CSUM)
		print_bool(PRINT_ANY, "icsum", "icsum ", true);
	if (oflags & GRE_CSUM)
		print_bool(PRINT_ANY, "ocsum", "ocsum ", true);

	if (tb[IFLA_GRE_FWMARK]) {
		__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);

		if (fwmark) {
			print_0xhex(PRINT_ANY,
				    "fwmark", "fwmark %#llx ", fwmark);
		}
	}

	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
		__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);

		print_uint(PRINT_ANY,
			   "erspan_index", "erspan_index %u ", erspan_idx);
	}

	if (tb[IFLA_GRE_ERSPAN_VER]) {
		__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);

		print_uint(PRINT_ANY,
			   "erspan_ver", "erspan_ver %u ", erspan_ver);
	}

	if (tb[IFLA_GRE_ERSPAN_DIR]) {
		__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);

		if (erspan_dir == 0)
			print_string(PRINT_ANY, "erspan_dir",
				     "erspan_dir ingress ", NULL);
		else
			print_string(PRINT_ANY, "erspan_dir",
				     "erspan_dir egress ", NULL);
	}

	if (tb[IFLA_GRE_ERSPAN_HWID]) {
		__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);

		print_0xhex(PRINT_ANY,
			    "erspan_hwid", "erspan_hwid %#llx ", erspan_hwid);
	}

	tnl_print_encap(tb,
			IFLA_GRE_ENCAP_TYPE,
			IFLA_GRE_ENCAP_FLAGS,
			IFLA_GRE_ENCAP_SPORT,
			IFLA_GRE_ENCAP_DPORT);
}

struct link_util gre_link_util = {
	.id = "gre",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};

struct link_util gretap_link_util = {
	.id = "gretap",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};

struct link_util erspan_link_util = {
	.id = "erspan",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};
Commit	Line	Data
237d9e82 HX	1	/*
	2	* link_gre.c gre driver module
	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: Herbert Xu <herbert@gondor.apana.org.au>
	10	*
	11	*/
	12
	13	#include <string.h>
	14	#include <net/if.h>
237d9e82 HX	15	#include <sys/types.h>
	16	#include <sys/socket.h>
	17	#include <arpa/inet.h>
	18
1957a322 SH	19	#include <linux/ip.h>
1957a322 SH	20	#include <linux/if_tunnel.h>
237d9e82 HX	21	#include "rt_names.h"
	22	#include "utils.h"
	23	#include "ip_common.h"
	24	#include "tunnel.h"
	25
ae91205c	26	static void gre_print_help(struct link_util lu, int argc, char argv, FILE f)
561e650e	27	{
8b471354	28	fprintf(f,
8589eb4e MC	29	"Usage: ... %-9s [ remote ADDR ]\n"
	30	" [ local ADDR ]\n"
	31	" [ [no][i\|o]seq ]\n"
	32	" [ [i\|o]key KEY \| no[i\|o]key ]\n"
	33	" [ [no][i\|o]csum ]\n"
	34	" [ ttl TTL ]\n"
	35	" [ tos TOS ]\n"
	36	" [ [no]pmtudisc ]\n"
	37	" [ [no]ignore-df ]\n"
	38	" [ dev PHYS_DEV ]\n"
	39	" [ fwmark MARK ]\n"
	40	" [ external ]\n"
	41	" [ noencap ]\n"
	42	" [ encap { fou \| gue \| none } ]\n"
	43	" [ encap-sport PORT ]\n"
	44	" [ encap-dport PORT ]\n"
	45	" [ [no]encap-csum ]\n"
	46	" [ [no]encap-csum6 ]\n"
	47	" [ [no]encap-remcsum ]\n"
	48	" [ erspan_ver version ]\n"
	49	" [ erspan IDX ]\n"
	50	" [ erspan_dir { ingress \| egress } ]\n"
	51	" [ erspan_hwid hwid ]\n"
8b471354	52	"\n"
8589eb4e MC	53	"Where: ADDR := { IP_ADDRESS \| any }\n"
	54	" TOS := { NUMBER \| inherit }\n"
	55	" TTL := { 1..255 \| inherit }\n"
	56	" KEY := { DOTTED_QUAD \| NUMBER }\n"
	57	" MARK := { 0x0..0xffffffff }\n",
	58	lu->id);
561e650e	59	}
561e650e	60
237d9e82 HX	61	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	62	struct nlmsghdr *n)
	63	{
28254695	64	struct ifinfomsg *ifi = NLMSG_DATA(n);
72c771b2 HX	65	struct {
	66	struct nlmsghdr n;
	67	struct ifinfomsg i;
d17b136f PS	68	} req = {
	69	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	70	.n.nlmsg_flags = NLM_F_REQUEST,
	71	.n.nlmsg_type = RTM_GETLINK,
	72	.i.ifi_family = preferred_family,
	73	.i.ifi_index = ifi->ifi_index,
	74	};
08ede25f	75	struct nlmsghdr *answer;
72c771b2 HX	76	struct rtattr *tb[IFLA_MAX + 1];
	77	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	78	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
5bd93795	79	int len;
237d9e82 HX	80	__u16 iflags = 0;
237d9e82 HX	81	__u16 oflags = 0;
1f44b937 SP	82	__be32 ikey = 0;
1f44b937 SP	83	__be32 okey = 0;
a066cc66	84	inet_prefix saddr, daddr;
72c771b2	85	__u8 pmtudisc = 1;
5bd93795	86	__u8 ignore_df = 0;
72c771b2	87	__u8 tos = 0;
5bd93795 SP	88	__u8 ttl = 0;
5bd93795 SP	89	__u32 link = 0;
80c24b09 TH	90	__u16 encaptype = 0;
	91	__u16 encapflags = 0;
	92	__u16 encapsport = 0;
	93	__u16 encapdport = 0;
926b39e1	94	__u8 metadata = 0;
ad4b1425	95	__u32 fwmark = 0;
9a1381d5	96	__u32 erspan_idx = 0;
28976362 WT	97	__u8 erspan_ver = 0;
	98	__u8 erspan_dir = 0;
	99	__u16 erspan_hwid = 0;
72c771b2	100
a066cc66 SP	101	inet_prefix_reset(&saddr);
	102	inet_prefix_reset(&daddr);
	103
72c771b2	104	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
a066cc66 SP	105	const struct rtattr *rta;
a066cc66 SP	106
86bf43c7	107	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
72c771b2 HX	108	get_failed:
	109	fprintf(stderr,
	110	"Failed to get existing tunnel info.\n");
	111	return -1;
	112	}
	113
86bf43c7	114	len = answer->nlmsg_len;
72c771b2 HX	115	len -= NLMSG_LENGTH(sizeof(*ifi));
	116	if (len < 0)
	117	goto get_failed;
	118
86bf43c7	119	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
72c771b2 HX	120
	121	if (!tb[IFLA_LINKINFO])
	122	goto get_failed;
	123
	124	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	125
	126	if (!linkinfo[IFLA_INFO_DATA])
	127	goto get_failed;
	128
	129	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	130	linkinfo[IFLA_INFO_DATA]);
	131
a066cc66 SP	132	rta = greinfo[IFLA_GRE_LOCAL];
	133	if (rta && get_addr_rta(&saddr, rta, AF_INET))
	134	goto get_failed;
	135
	136	rta = greinfo[IFLA_GRE_REMOTE];
	137	if (rta && get_addr_rta(&daddr, rta, AF_INET))
	138	goto get_failed;
	139
72c771b2	140	if (greinfo[IFLA_GRE_IKEY])
ff24746c	141	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
72c771b2 HX	142
72c771b2 HX	143	if (greinfo[IFLA_GRE_OKEY])
ff24746c	144	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
72c771b2 HX	145
72c771b2 HX	146	if (greinfo[IFLA_GRE_IFLAGS])
ff24746c	147	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
72c771b2 HX	148
72c771b2 HX	149	if (greinfo[IFLA_GRE_OFLAGS])
ff24746c	150	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
72c771b2	151
72c771b2	152	if (greinfo[IFLA_GRE_PMTUDISC])
ff24746c	153	pmtudisc = rta_getattr_u8(
72c771b2 HX	154	greinfo[IFLA_GRE_PMTUDISC]);
72c771b2 HX	155
5bd93795 SP	156	if (greinfo[IFLA_GRE_IGNORE_DF])
	157	ignore_df =
	158	!!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]);
72c771b2 HX	159
72c771b2 HX	160	if (greinfo[IFLA_GRE_TOS])
ff24746c	161	tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]);
72c771b2	162
5bd93795 SP	163	if (greinfo[IFLA_GRE_TTL])
	164	ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	165
72c771b2	166	if (greinfo[IFLA_GRE_LINK])
a6addd5c	167	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
80c24b09 TH	168
	169	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	170	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
5bd93795	171
80c24b09 TH	172	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
80c24b09 TH	173	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
5bd93795	174
80c24b09 TH	175	if (greinfo[IFLA_GRE_ENCAP_SPORT])
80c24b09 TH	176	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
5bd93795	177
80c24b09 TH	178	if (greinfo[IFLA_GRE_ENCAP_DPORT])
80c24b09 TH	179	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
926b39e1 PA	180
	181	if (greinfo[IFLA_GRE_COLLECT_METADATA])
	182	metadata = 1;
ad4b1425 CG	183
	184	if (greinfo[IFLA_GRE_FWMARK])
	185	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
9a1381d5 WT	186
	187	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	188	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
86bf43c7	189
28976362 WT	190	if (greinfo[IFLA_GRE_ERSPAN_VER])
	191	erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);
	192
	193	if (greinfo[IFLA_GRE_ERSPAN_DIR])
	194	erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);
	195
	196	if (greinfo[IFLA_GRE_ERSPAN_HWID])
	197	erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);
	198
86bf43c7	199	free(answer);
72c771b2	200	}
237d9e82 HX	201
	202	while (argc > 0) {
	203	if (!matches(*argv, "key")) {
237d9e82 HX	204	NEXT_ARG();
	205	iflags \|= GRE_KEY;
	206	oflags \|= GRE_KEY;
1f44b937	207	ikey = okey = tnl_parse_key("key", *argv);
7f520601 SD	208	} else if (!matches(*argv, "nokey")) {
	209	iflags &= ~GRE_KEY;
	210	oflags &= ~GRE_KEY;
	211	ikey = okey = 0;
237d9e82	212	} else if (!matches(*argv, "ikey")) {
237d9e82 HX	213	NEXT_ARG();
237d9e82 HX	214	iflags \|= GRE_KEY;
1f44b937	215	ikey = tnl_parse_key("ikey", *argv);
7f520601 SD	216	} else if (!matches(*argv, "noikey")) {
	217	iflags &= ~GRE_KEY;
	218	ikey = 0;
237d9e82	219	} else if (!matches(*argv, "okey")) {
237d9e82 HX	220	NEXT_ARG();
237d9e82 HX	221	oflags \|= GRE_KEY;
1f44b937	222	okey = tnl_parse_key("okey", *argv);
7f520601 SD	223	} else if (!matches(*argv, "nookey")) {
	224	oflags &= ~GRE_KEY;
	225	okey = 0;
237d9e82 HX	226	} else if (!matches(*argv, "seq")) {
	227	iflags \|= GRE_SEQ;
	228	oflags \|= GRE_SEQ;
7f520601 SD	229	} else if (!matches(*argv, "noseq")) {
	230	iflags &= ~GRE_SEQ;
	231	oflags &= ~GRE_SEQ;
237d9e82 HX	232	} else if (!matches(*argv, "iseq")) {
237d9e82 HX	233	iflags \|= GRE_SEQ;
7f520601 SD	234	} else if (!matches(*argv, "noiseq")) {
7f520601 SD	235	iflags &= ~GRE_SEQ;
237d9e82 HX	236	} else if (!matches(*argv, "oseq")) {
237d9e82 HX	237	oflags \|= GRE_SEQ;
7f520601 SD	238	} else if (!matches(*argv, "nooseq")) {
7f520601 SD	239	oflags &= ~GRE_SEQ;
237d9e82 HX	240	} else if (!matches(*argv, "csum")) {
	241	iflags \|= GRE_CSUM;
	242	oflags \|= GRE_CSUM;
7f520601 SD	243	} else if (!matches(*argv, "nocsum")) {
	244	iflags &= ~GRE_CSUM;
	245	oflags &= ~GRE_CSUM;
237d9e82 HX	246	} else if (!matches(*argv, "icsum")) {
237d9e82 HX	247	iflags \|= GRE_CSUM;
7f520601 SD	248	} else if (!matches(*argv, "noicsum")) {
7f520601 SD	249	iflags &= ~GRE_CSUM;
237d9e82 HX	250	} else if (!matches(*argv, "ocsum")) {
237d9e82 HX	251	oflags \|= GRE_CSUM;
7f520601 SD	252	} else if (!matches(*argv, "noocsum")) {
7f520601 SD	253	oflags &= ~GRE_CSUM;
237d9e82	254	} else if (!matches(*argv, "nopmtudisc")) {
72c771b2	255	pmtudisc = 0;
237d9e82	256	} else if (!matches(*argv, "pmtudisc")) {
72c771b2	257	pmtudisc = 1;
237d9e82 HX	258	} else if (!matches(*argv, "remote")) {
237d9e82 HX	259	NEXT_ARG();
a066cc66	260	get_addr(&daddr, *argv, AF_INET);
237d9e82 HX	261	} else if (!matches(*argv, "local")) {
237d9e82 HX	262	NEXT_ARG();
a066cc66	263	get_addr(&saddr, *argv, AF_INET);
237d9e82	264	} else if (!matches(*argv, "dev")) {
237d9e82	265	NEXT_ARG();
7a14358b	266	link = ll_name_to_index(*argv);
fe99adbc SP	267	if (!link)
fe99adbc SP	268	exit(nodev(*argv));
237d9e82	269	} else if (!matches(*argv, "ttl") \|\|
c4743c4d SP	270	!matches(*argv, "hoplimit") \|\|
c4743c4d SP	271	!matches(*argv, "hlim")) {
237d9e82 HX	272	NEXT_ARG();
237d9e82 HX	273	if (strcmp(*argv, "inherit") != 0) {
c4743c4d	274	if (get_u8(&ttl, *argv, 0))
237d9e82	275	invarg("invalid TTL\n", *argv);
079e6781 RS	276	} else
079e6781 RS	277	ttl = 0;
237d9e82 HX	278	} else if (!matches(*argv, "tos") \|\|
	279	!matches(*argv, "tclass") \|\|
	280	!matches(*argv, "dsfield")) {
	281	__u32 uval;
237d9e82 HX	282
	283	NEXT_ARG();
	284	if (strcmp(*argv, "inherit") != 0) {
	285	if (rtnl_dsfield_a2n(&uval, *argv))
	286	invarg("bad TOS value", *argv);
	287	tos = uval;
	288	} else
	289	tos = 1;
80c24b09 TH	290	} else if (strcmp(*argv, "noencap") == 0) {
	291	encaptype = TUNNEL_ENCAP_NONE;
	292	} else if (strcmp(*argv, "encap") == 0) {
	293	NEXT_ARG();
	294	if (strcmp(*argv, "fou") == 0)
	295	encaptype = TUNNEL_ENCAP_FOU;
	296	else if (strcmp(*argv, "gue") == 0)
	297	encaptype = TUNNEL_ENCAP_GUE;
	298	else if (strcmp(*argv, "none") == 0)
	299	encaptype = TUNNEL_ENCAP_NONE;
	300	else
	301	invarg("Invalid encap type.", *argv);
	302	} else if (strcmp(*argv, "encap-sport") == 0) {
	303	NEXT_ARG();
	304	if (strcmp(*argv, "auto") == 0)
	305	encapsport = 0;
	306	else if (get_u16(&encapsport, *argv, 0))
	307	invarg("Invalid source port.", *argv);
	308	} else if (strcmp(*argv, "encap-dport") == 0) {
	309	NEXT_ARG();
	310	if (get_u16(&encapdport, *argv, 0))
	311	invarg("Invalid destination port.", *argv);
	312	} else if (strcmp(*argv, "encap-csum") == 0) {
	313	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	314	} else if (strcmp(*argv, "noencap-csum") == 0) {
	315	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	316	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	317	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	318	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
147ade01	319	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
858dbb20 TH	320	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	321	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	322	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
147ade01	323	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
926b39e1 PA	324	} else if (strcmp(*argv, "external") == 0) {
926b39e1 PA	325	metadata = 1;
adbb2965 PP	326	} else if (strcmp(*argv, "ignore-df") == 0) {
	327	ignore_df = 1;
	328	} else if (strcmp(*argv, "noignore-df") == 0) {
	329	/*
	330	*only the lsb is significant, use 2 for presence
	331	*/
	332	ignore_df = 2;
ad4b1425 CG	333	} else if (strcmp(*argv, "fwmark") == 0) {
	334	NEXT_ARG();
	335	if (get_u32(&fwmark, *argv, 0))
	336	invarg("invalid fwmark\n", *argv);
9a1381d5 WT	337	} else if (strcmp(*argv, "erspan") == 0) {
	338	NEXT_ARG();
	339	if (get_u32(&erspan_idx, *argv, 0))
	340	invarg("invalid erspan index\n", *argv);
	341	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	342	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
28976362 WT	343	} else if (strcmp(*argv, "erspan_ver") == 0) {
	344	NEXT_ARG();
	345	if (get_u8(&erspan_ver, *argv, 0))
	346	invarg("invalid erspan version\n", *argv);
	347	if (erspan_ver != 1 && erspan_ver != 2)
	348	invarg("erspan version must be 1 or 2\n", *argv);
	349	} else if (strcmp(*argv, "erspan_dir") == 0) {
	350	NEXT_ARG();
	351	if (matches(*argv, "ingress") == 0)
	352	erspan_dir = 0;
	353	else if (matches(*argv, "egress") == 0)
	354	erspan_dir = 1;
	355	else
	356	invarg("Invalid erspan direction.", *argv);
	357	} else if (strcmp(*argv, "erspan_hwid") == 0) {
	358	NEXT_ARG();
	359	if (get_u16(&erspan_hwid, *argv, 0))
	360	invarg("invalid erspan hwid\n", *argv);
ae91205c SP	361	} else {
	362	gre_print_help(lu, argc, argv, stderr);
	363	return -1;
	364	}
237d9e82 HX	365	argc--; argv++;
	366	}
	367
a066cc66 SP	368	if (is_addrtype_inet_multi(&daddr)) {
	369	if (!ikey) {
	370	ikey = daddr.data[0];
	371	iflags \|= GRE_KEY;
	372	}
	373	if (!okey) {
	374	okey = daddr.data[0];
	375	oflags \|= GRE_KEY;
	376	}
	377	if (!is_addrtype_inet_not_unspec(&saddr)) {
	378	fprintf(stderr,
	379	"A broadcast tunnel requires a source address.\n");
	380	return -1;
	381	}
237d9e82 HX	382	}
237d9e82 HX	383
5bd93795	384	if (metadata) {
df217d5d	385	addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
5bd93795	386	return 0;
df217d5d	387	}
237d9e82	388
5bd93795 SP	389	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	390	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	391	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	392	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
fa1e658e	393	if (is_addrtype_inet_not_unspec(&saddr))
a066cc66	394	addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
fa1e658e	395	if (is_addrtype_inet_not_unspec(&daddr))
a066cc66	396	addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
5bd93795 SP	397	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
	398	if (ignore_df)
	399	addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);
	400	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
	401	if (link)
	402	addattr32(n, 1024, IFLA_GRE_LINK, link);
	403	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
	404	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
	405	if (erspan_ver) {
	406	addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
	407	if (erspan_ver == 1 && erspan_idx != 0) {
	408	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
	409	} else if (erspan_ver == 2) {
	410	addattr8(n, 1024, IFLA_GRE_ERSPAN_DIR, erspan_dir);
	411	addattr16(n, 1024, IFLA_GRE_ERSPAN_HWID, erspan_hwid);
	412	}
	413	}
	414	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	415	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	416	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	417	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	418
237d9e82 HX	419	return 0;
	420	}
	421
00ff4b8e	422	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
237d9e82	423	{
237d9e82	424	char s2[64];
5bd93795 SP	425	__u16 iflags = 0;
5bd93795 SP	426	__u16 oflags = 0;
375560c4	427	__u8 ttl = 0;
3caa526c	428	__u8 tos = 0;
237d9e82	429
00ff4b8e SP	430	if (!tb)
	431	return;
	432
	433	if (tb[IFLA_GRE_COLLECT_METADATA]) {
d6abae5a	434	print_bool(PRINT_ANY, "external", "external ", true);
00ff4b8e SP	435	return;
	436	}
	437
b761fc41 SP	438	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET);
b761fc41 SP	439	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET);
237d9e82	440
45d3a6ef	441	if (tb[IFLA_GRE_LINK]) {
5bd93795	442	__u32 link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
237d9e82	443
45d3a6ef SP	444	if (link) {
	445	print_string(PRINT_ANY, "link", "dev %s ",
	446	ll_index_to_name(link));
	447	}
237d9e82 HX	448	}
237d9e82 HX	449
375560c4 SP	450	if (tb[IFLA_GRE_TTL])
	451	ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	452	if (is_json_context() \|\| ttl)
	453	print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
	454	else
e2d45883	455	print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
e2d45883	456
3caa526c SP	457	if (tb[IFLA_GRE_TOS])
	458	tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);
	459	if (tos) {
	460	if (is_json_context() \|\| tos != 1)
90c5c969	461	print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos);
3caa526c SP	462	else
3caa526c SP	463	print_string(PRINT_FP, NULL, "tos %s ", "inherit");
237d9e82 HX	464	}
237d9e82 HX	465
e2d45883 JF	466	if (tb[IFLA_GRE_PMTUDISC]) {
	467	if (!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
	468	print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
	469	else
	470	print_bool(PRINT_JSON, "pmtudisc", NULL, true);
	471	}
237d9e82	472
00ff4b8e SP	473	if (tb[IFLA_GRE_IGNORE_DF] && rta_getattr_u8(tb[IFLA_GRE_IGNORE_DF]))
	474	print_bool(PRINT_ANY, "ignore_df", "ignore-df ", true);
	475
237d9e82	476	if (tb[IFLA_GRE_IFLAGS])
ff24746c	477	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
237d9e82 HX	478
237d9e82 HX	479	if (tb[IFLA_GRE_OFLAGS])
ff24746c	480	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
237d9e82	481
71816553	482	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
237d9e82	483	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
e2d45883	484	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
237d9e82 HX	485	}
237d9e82 HX	486
71816553	487	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
237d9e82	488	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
e2d45883	489	print_string(PRINT_ANY, "okey", "okey %s ", s2);
237d9e82 HX	490	}
	491
	492	if (iflags & GRE_SEQ)
e2d45883	493	print_bool(PRINT_ANY, "iseq", "iseq ", true);
237d9e82	494	if (oflags & GRE_SEQ)
e2d45883	495	print_bool(PRINT_ANY, "oseq", "oseq ", true);
237d9e82	496	if (iflags & GRE_CSUM)
e2d45883	497	print_bool(PRINT_ANY, "icsum", "icsum ", true);
237d9e82	498	if (oflags & GRE_CSUM)
e2d45883 JF	499	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
	500
	501	if (tb[IFLA_GRE_FWMARK]) {
	502	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	503
	504	if (fwmark) {
e97ad3d2	505	print_0xhex(PRINT_ANY,
90c5c969	506	"fwmark", "fwmark %#llx ", fwmark);
e2d45883	507	}
ad4b1425	508	}
adbb2965	509
9a1381d5 WT	510	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
	511	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
	512
3cb92eb9 SP	513	print_uint(PRINT_ANY,
3cb92eb9 SP	514	"erspan_index", "erspan_index %u ", erspan_idx);
28976362 WT	515	}
	516
	517	if (tb[IFLA_GRE_ERSPAN_VER]) {
	518	__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);
	519
db2b8b6e SP	520	print_uint(PRINT_ANY,
db2b8b6e SP	521	"erspan_ver", "erspan_ver %u ", erspan_ver);
28976362 WT	522	}
	523
	524	if (tb[IFLA_GRE_ERSPAN_DIR]) {
	525	__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);
	526
	527	if (erspan_dir == 0)
	528	print_string(PRINT_ANY, "erspan_dir",
	529	"erspan_dir ingress ", NULL);
	530	else
	531	print_string(PRINT_ANY, "erspan_dir",
	532	"erspan_dir egress ", NULL);
	533	}
	534
	535	if (tb[IFLA_GRE_ERSPAN_HWID]) {
	536	__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);
	537
db2b8b6e	538	print_0xhex(PRINT_ANY,
90c5c969	539	"erspan_hwid", "erspan_hwid %#llx ", erspan_hwid);
9a1381d5 WT	540	}
9a1381d5 WT	541
bad76e6b SP	542	tnl_print_encap(tb,
	543	IFLA_GRE_ENCAP_TYPE,
	544	IFLA_GRE_ENCAP_FLAGS,
	545	IFLA_GRE_ENCAP_SPORT,
	546	IFLA_GRE_ENCAP_DPORT);
237d9e82 HX	547	}
	548
	549	struct link_util gre_link_util = {
	550	.id = "gre",
	551	.maxattr = IFLA_GRE_MAX,
	552	.parse_opt = gre_parse_opt,
	553	.print_opt = gre_print_opt,
561e650e	554	.print_help = gre_print_help,
237d9e82 HX	555	};
	556
	557	struct link_util gretap_link_util = {
	558	.id = "gretap",
	559	.maxattr = IFLA_GRE_MAX,
	560	.parse_opt = gre_parse_opt,
	561	.print_opt = gre_print_opt,
561e650e	562	.print_help = gre_print_help,
237d9e82	563	};
9a1381d5 WT	564
	565	struct link_util erspan_link_util = {
	566	.id = "erspan",
	567	.maxattr = IFLA_GRE_MAX,
	568	.parse_opt = gre_parse_opt,
	569	.print_opt = gre_print_opt,
	570	.print_help = gre_print_help,
	571	};