[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",
		lu->id
	);
	fprintf(f,
		"                     [ 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"
	);
	fprintf(f,
		"Where: ADDR := { IP_ADDRESS | any }\n"
		"       TOS  := { NUMBER | inherit }\n"
		"       TTL  := { 1..255 | inherit }\n"
		"       KEY  := { DOTTED_QUAD | NUMBER }\n"
		"       MARK := { 0x0..0xffffffff }\n"
	);
}

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,
ae91205c SP	29	"Usage: ... %-9s [ remote ADDR ]\n",
	30	lu->id
	31	);
	32	fprintf(f,
	33	" [ local ADDR ]\n"
7f520601 SD	34	" [ [no][i\|o]seq ]\n"
	35	" [ [i\|o]key KEY \| no[i\|o]key ]\n"
	36	" [ [no][i\|o]csum ]\n"
ae91205c SP	37	" [ ttl TTL ]\n"
	38	" [ tos TOS ]\n"
	39	" [ [no]pmtudisc ]\n"
	40	" [ [no]ignore-df ]\n"
	41	" [ dev PHYS_DEV ]\n"
	42	" [ fwmark MARK ]\n"
	43	" [ external ]\n"
	44	" [ noencap ]\n"
	45	" [ encap { fou \| gue \| none } ]\n"
	46	" [ encap-sport PORT ]\n"
	47	" [ encap-dport PORT ]\n"
	48	" [ [no]encap-csum ]\n"
	49	" [ [no]encap-csum6 ]\n"
	50	" [ [no]encap-remcsum ]\n"
	51	" [ erspan_ver version ]\n"
	52	" [ erspan IDX ]\n"
	53	" [ erspan_dir { ingress \| egress } ]\n"
	54	" [ erspan_hwid hwid ]\n"
8b471354	55	"\n"
ae91205c SP	56	);
ae91205c SP	57	fprintf(f,
8b471354 PS	58	"Where: ADDR := { IP_ADDRESS \| any }\n"
	59	" TOS := { NUMBER \| inherit }\n"
	60	" TTL := { 1..255 \| inherit }\n"
	61	" KEY := { DOTTED_QUAD \| NUMBER }\n"
ad4b1425	62	" MARK := { 0x0..0xffffffff }\n"
8b471354	63	);
561e650e	64	}
561e650e	65
237d9e82 HX	66	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	67	struct nlmsghdr *n)
	68	{
28254695	69	struct ifinfomsg *ifi = NLMSG_DATA(n);
72c771b2 HX	70	struct {
	71	struct nlmsghdr n;
	72	struct ifinfomsg i;
d17b136f PS	73	} req = {
	74	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	75	.n.nlmsg_flags = NLM_F_REQUEST,
	76	.n.nlmsg_type = RTM_GETLINK,
	77	.i.ifi_family = preferred_family,
	78	.i.ifi_index = ifi->ifi_index,
	79	};
08ede25f	80	struct nlmsghdr *answer;
72c771b2 HX	81	struct rtattr *tb[IFLA_MAX + 1];
	82	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	83	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
5bd93795	84	int len;
237d9e82 HX	85	__u16 iflags = 0;
237d9e82 HX	86	__u16 oflags = 0;
1f44b937 SP	87	__be32 ikey = 0;
1f44b937 SP	88	__be32 okey = 0;
a066cc66	89	inet_prefix saddr, daddr;
72c771b2	90	__u8 pmtudisc = 1;
5bd93795	91	__u8 ignore_df = 0;
72c771b2	92	__u8 tos = 0;
5bd93795 SP	93	__u8 ttl = 0;
5bd93795 SP	94	__u32 link = 0;
80c24b09 TH	95	__u16 encaptype = 0;
	96	__u16 encapflags = 0;
	97	__u16 encapsport = 0;
	98	__u16 encapdport = 0;
926b39e1	99	__u8 metadata = 0;
ad4b1425	100	__u32 fwmark = 0;
9a1381d5	101	__u32 erspan_idx = 0;
28976362 WT	102	__u8 erspan_ver = 0;
	103	__u8 erspan_dir = 0;
	104	__u16 erspan_hwid = 0;
72c771b2	105
a066cc66 SP	106	inet_prefix_reset(&saddr);
	107	inet_prefix_reset(&daddr);
	108
72c771b2	109	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
a066cc66 SP	110	const struct rtattr *rta;
a066cc66 SP	111
86bf43c7	112	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
72c771b2 HX	113	get_failed:
	114	fprintf(stderr,
	115	"Failed to get existing tunnel info.\n");
	116	return -1;
	117	}
	118
86bf43c7	119	len = answer->nlmsg_len;
72c771b2 HX	120	len -= NLMSG_LENGTH(sizeof(*ifi));
	121	if (len < 0)
	122	goto get_failed;
	123
86bf43c7	124	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
72c771b2 HX	125
	126	if (!tb[IFLA_LINKINFO])
	127	goto get_failed;
	128
	129	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	130
	131	if (!linkinfo[IFLA_INFO_DATA])
	132	goto get_failed;
	133
	134	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	135	linkinfo[IFLA_INFO_DATA]);
	136
a066cc66 SP	137	rta = greinfo[IFLA_GRE_LOCAL];
	138	if (rta && get_addr_rta(&saddr, rta, AF_INET))
	139	goto get_failed;
	140
	141	rta = greinfo[IFLA_GRE_REMOTE];
	142	if (rta && get_addr_rta(&daddr, rta, AF_INET))
	143	goto get_failed;
	144
72c771b2	145	if (greinfo[IFLA_GRE_IKEY])
ff24746c	146	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
72c771b2 HX	147
72c771b2 HX	148	if (greinfo[IFLA_GRE_OKEY])
ff24746c	149	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
72c771b2 HX	150
72c771b2 HX	151	if (greinfo[IFLA_GRE_IFLAGS])
ff24746c	152	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
72c771b2 HX	153
72c771b2 HX	154	if (greinfo[IFLA_GRE_OFLAGS])
ff24746c	155	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
72c771b2	156
72c771b2	157	if (greinfo[IFLA_GRE_PMTUDISC])
ff24746c	158	pmtudisc = rta_getattr_u8(
72c771b2 HX	159	greinfo[IFLA_GRE_PMTUDISC]);
72c771b2 HX	160
5bd93795 SP	161	if (greinfo[IFLA_GRE_IGNORE_DF])
	162	ignore_df =
	163	!!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]);
72c771b2 HX	164
72c771b2 HX	165	if (greinfo[IFLA_GRE_TOS])
ff24746c	166	tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]);
72c771b2	167
5bd93795 SP	168	if (greinfo[IFLA_GRE_TTL])
	169	ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	170
72c771b2	171	if (greinfo[IFLA_GRE_LINK])
a6addd5c	172	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
80c24b09 TH	173
	174	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	175	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
5bd93795	176
80c24b09 TH	177	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
80c24b09 TH	178	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
5bd93795	179
80c24b09 TH	180	if (greinfo[IFLA_GRE_ENCAP_SPORT])
80c24b09 TH	181	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
5bd93795	182
80c24b09 TH	183	if (greinfo[IFLA_GRE_ENCAP_DPORT])
80c24b09 TH	184	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
926b39e1 PA	185
	186	if (greinfo[IFLA_GRE_COLLECT_METADATA])
	187	metadata = 1;
ad4b1425 CG	188
	189	if (greinfo[IFLA_GRE_FWMARK])
	190	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
9a1381d5 WT	191
	192	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	193	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
86bf43c7	194
28976362 WT	195	if (greinfo[IFLA_GRE_ERSPAN_VER])
	196	erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);
	197
	198	if (greinfo[IFLA_GRE_ERSPAN_DIR])
	199	erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);
	200
	201	if (greinfo[IFLA_GRE_ERSPAN_HWID])
	202	erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);
	203
86bf43c7	204	free(answer);
72c771b2	205	}
237d9e82 HX	206
	207	while (argc > 0) {
	208	if (!matches(*argv, "key")) {
237d9e82 HX	209	NEXT_ARG();
	210	iflags \|= GRE_KEY;
	211	oflags \|= GRE_KEY;
1f44b937	212	ikey = okey = tnl_parse_key("key", *argv);
7f520601 SD	213	} else if (!matches(*argv, "nokey")) {
	214	iflags &= ~GRE_KEY;
	215	oflags &= ~GRE_KEY;
	216	ikey = okey = 0;
237d9e82	217	} else if (!matches(*argv, "ikey")) {
237d9e82 HX	218	NEXT_ARG();
237d9e82 HX	219	iflags \|= GRE_KEY;
1f44b937	220	ikey = tnl_parse_key("ikey", *argv);
7f520601 SD	221	} else if (!matches(*argv, "noikey")) {
	222	iflags &= ~GRE_KEY;
	223	ikey = 0;
237d9e82	224	} else if (!matches(*argv, "okey")) {
237d9e82 HX	225	NEXT_ARG();
237d9e82 HX	226	oflags \|= GRE_KEY;
1f44b937	227	okey = tnl_parse_key("okey", *argv);
7f520601 SD	228	} else if (!matches(*argv, "nookey")) {
	229	oflags &= ~GRE_KEY;
	230	okey = 0;
237d9e82 HX	231	} else if (!matches(*argv, "seq")) {
	232	iflags \|= GRE_SEQ;
	233	oflags \|= GRE_SEQ;
7f520601 SD	234	} else if (!matches(*argv, "noseq")) {
	235	iflags &= ~GRE_SEQ;
	236	oflags &= ~GRE_SEQ;
237d9e82 HX	237	} else if (!matches(*argv, "iseq")) {
237d9e82 HX	238	iflags \|= GRE_SEQ;
7f520601 SD	239	} else if (!matches(*argv, "noiseq")) {
7f520601 SD	240	iflags &= ~GRE_SEQ;
237d9e82 HX	241	} else if (!matches(*argv, "oseq")) {
237d9e82 HX	242	oflags \|= GRE_SEQ;
7f520601 SD	243	} else if (!matches(*argv, "nooseq")) {
7f520601 SD	244	oflags &= ~GRE_SEQ;
237d9e82 HX	245	} else if (!matches(*argv, "csum")) {
	246	iflags \|= GRE_CSUM;
	247	oflags \|= GRE_CSUM;
7f520601 SD	248	} else if (!matches(*argv, "nocsum")) {
	249	iflags &= ~GRE_CSUM;
	250	oflags &= ~GRE_CSUM;
237d9e82 HX	251	} else if (!matches(*argv, "icsum")) {
237d9e82 HX	252	iflags \|= GRE_CSUM;
7f520601 SD	253	} else if (!matches(*argv, "noicsum")) {
7f520601 SD	254	iflags &= ~GRE_CSUM;
237d9e82 HX	255	} else if (!matches(*argv, "ocsum")) {
237d9e82 HX	256	oflags \|= GRE_CSUM;
7f520601 SD	257	} else if (!matches(*argv, "noocsum")) {
7f520601 SD	258	oflags &= ~GRE_CSUM;
237d9e82	259	} else if (!matches(*argv, "nopmtudisc")) {
72c771b2	260	pmtudisc = 0;
237d9e82	261	} else if (!matches(*argv, "pmtudisc")) {
72c771b2	262	pmtudisc = 1;
237d9e82 HX	263	} else if (!matches(*argv, "remote")) {
237d9e82 HX	264	NEXT_ARG();
a066cc66	265	get_addr(&daddr, *argv, AF_INET);
237d9e82 HX	266	} else if (!matches(*argv, "local")) {
237d9e82 HX	267	NEXT_ARG();
a066cc66	268	get_addr(&saddr, *argv, AF_INET);
237d9e82	269	} else if (!matches(*argv, "dev")) {
237d9e82	270	NEXT_ARG();
7a14358b	271	link = ll_name_to_index(*argv);
fe99adbc SP	272	if (!link)
fe99adbc SP	273	exit(nodev(*argv));
237d9e82	274	} else if (!matches(*argv, "ttl") \|\|
c4743c4d SP	275	!matches(*argv, "hoplimit") \|\|
c4743c4d SP	276	!matches(*argv, "hlim")) {
237d9e82 HX	277	NEXT_ARG();
237d9e82 HX	278	if (strcmp(*argv, "inherit") != 0) {
c4743c4d	279	if (get_u8(&ttl, *argv, 0))
237d9e82	280	invarg("invalid TTL\n", *argv);
079e6781 RS	281	} else
079e6781 RS	282	ttl = 0;
237d9e82 HX	283	} else if (!matches(*argv, "tos") \|\|
	284	!matches(*argv, "tclass") \|\|
	285	!matches(*argv, "dsfield")) {
	286	__u32 uval;
237d9e82 HX	287
	288	NEXT_ARG();
	289	if (strcmp(*argv, "inherit") != 0) {
	290	if (rtnl_dsfield_a2n(&uval, *argv))
	291	invarg("bad TOS value", *argv);
	292	tos = uval;
	293	} else
	294	tos = 1;
80c24b09 TH	295	} else if (strcmp(*argv, "noencap") == 0) {
	296	encaptype = TUNNEL_ENCAP_NONE;
	297	} else if (strcmp(*argv, "encap") == 0) {
	298	NEXT_ARG();
	299	if (strcmp(*argv, "fou") == 0)
	300	encaptype = TUNNEL_ENCAP_FOU;
	301	else if (strcmp(*argv, "gue") == 0)
	302	encaptype = TUNNEL_ENCAP_GUE;
	303	else if (strcmp(*argv, "none") == 0)
	304	encaptype = TUNNEL_ENCAP_NONE;
	305	else
	306	invarg("Invalid encap type.", *argv);
	307	} else if (strcmp(*argv, "encap-sport") == 0) {
	308	NEXT_ARG();
	309	if (strcmp(*argv, "auto") == 0)
	310	encapsport = 0;
	311	else if (get_u16(&encapsport, *argv, 0))
	312	invarg("Invalid source port.", *argv);
	313	} else if (strcmp(*argv, "encap-dport") == 0) {
	314	NEXT_ARG();
	315	if (get_u16(&encapdport, *argv, 0))
	316	invarg("Invalid destination port.", *argv);
	317	} else if (strcmp(*argv, "encap-csum") == 0) {
	318	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	319	} else if (strcmp(*argv, "noencap-csum") == 0) {
	320	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	321	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	322	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	323	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
147ade01	324	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
858dbb20 TH	325	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	326	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	327	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
147ade01	328	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
926b39e1 PA	329	} else if (strcmp(*argv, "external") == 0) {
926b39e1 PA	330	metadata = 1;
adbb2965 PP	331	} else if (strcmp(*argv, "ignore-df") == 0) {
	332	ignore_df = 1;
	333	} else if (strcmp(*argv, "noignore-df") == 0) {
	334	/*
	335	*only the lsb is significant, use 2 for presence
	336	*/
	337	ignore_df = 2;
ad4b1425 CG	338	} else if (strcmp(*argv, "fwmark") == 0) {
	339	NEXT_ARG();
	340	if (get_u32(&fwmark, *argv, 0))
	341	invarg("invalid fwmark\n", *argv);
9a1381d5 WT	342	} else if (strcmp(*argv, "erspan") == 0) {
	343	NEXT_ARG();
	344	if (get_u32(&erspan_idx, *argv, 0))
	345	invarg("invalid erspan index\n", *argv);
	346	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	347	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
28976362 WT	348	} else if (strcmp(*argv, "erspan_ver") == 0) {
	349	NEXT_ARG();
	350	if (get_u8(&erspan_ver, *argv, 0))
	351	invarg("invalid erspan version\n", *argv);
	352	if (erspan_ver != 1 && erspan_ver != 2)
	353	invarg("erspan version must be 1 or 2\n", *argv);
	354	} else if (strcmp(*argv, "erspan_dir") == 0) {
	355	NEXT_ARG();
	356	if (matches(*argv, "ingress") == 0)
	357	erspan_dir = 0;
	358	else if (matches(*argv, "egress") == 0)
	359	erspan_dir = 1;
	360	else
	361	invarg("Invalid erspan direction.", *argv);
	362	} else if (strcmp(*argv, "erspan_hwid") == 0) {
	363	NEXT_ARG();
	364	if (get_u16(&erspan_hwid, *argv, 0))
	365	invarg("invalid erspan hwid\n", *argv);
ae91205c SP	366	} else {
	367	gre_print_help(lu, argc, argv, stderr);
	368	return -1;
	369	}
237d9e82 HX	370	argc--; argv++;
	371	}
	372
a066cc66 SP	373	if (is_addrtype_inet_multi(&daddr)) {
	374	if (!ikey) {
	375	ikey = daddr.data[0];
	376	iflags \|= GRE_KEY;
	377	}
	378	if (!okey) {
	379	okey = daddr.data[0];
	380	oflags \|= GRE_KEY;
	381	}
	382	if (!is_addrtype_inet_not_unspec(&saddr)) {
	383	fprintf(stderr,
	384	"A broadcast tunnel requires a source address.\n");
	385	return -1;
	386	}
237d9e82 HX	387	}
237d9e82 HX	388
5bd93795	389	if (metadata) {
df217d5d	390	addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
5bd93795	391	return 0;
df217d5d	392	}
237d9e82	393
5bd93795 SP	394	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	395	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	396	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	397	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
fa1e658e	398	if (is_addrtype_inet_not_unspec(&saddr))
a066cc66	399	addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
fa1e658e	400	if (is_addrtype_inet_not_unspec(&daddr))
a066cc66	401	addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
5bd93795 SP	402	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
	403	if (ignore_df)
	404	addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);
	405	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
	406	if (link)
	407	addattr32(n, 1024, IFLA_GRE_LINK, link);
	408	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
	409	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
	410	if (erspan_ver) {
	411	addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
	412	if (erspan_ver == 1 && erspan_idx != 0) {
	413	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
	414	} else if (erspan_ver == 2) {
	415	addattr8(n, 1024, IFLA_GRE_ERSPAN_DIR, erspan_dir);
	416	addattr16(n, 1024, IFLA_GRE_ERSPAN_HWID, erspan_hwid);
	417	}
	418	}
	419	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	420	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	421	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	422	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	423
237d9e82 HX	424	return 0;
	425	}
	426
00ff4b8e	427	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
237d9e82	428	{
237d9e82	429	char s2[64];
5bd93795 SP	430	__u16 iflags = 0;
5bd93795 SP	431	__u16 oflags = 0;
375560c4	432	__u8 ttl = 0;
3caa526c	433	__u8 tos = 0;
237d9e82	434
00ff4b8e SP	435	if (!tb)
	436	return;
	437
	438	if (tb[IFLA_GRE_COLLECT_METADATA]) {
	439	print_bool(PRINT_ANY, "external", "external", true);
	440	return;
	441	}
	442
b761fc41 SP	443	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET);
b761fc41 SP	444	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET);
237d9e82	445
45d3a6ef	446	if (tb[IFLA_GRE_LINK]) {
5bd93795	447	__u32 link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
237d9e82	448
45d3a6ef SP	449	if (link) {
	450	print_string(PRINT_ANY, "link", "dev %s ",
	451	ll_index_to_name(link));
	452	}
237d9e82 HX	453	}
237d9e82 HX	454
375560c4 SP	455	if (tb[IFLA_GRE_TTL])
	456	ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	457	if (is_json_context() \|\| ttl)
	458	print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
	459	else
e2d45883	460	print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
e2d45883	461
3caa526c SP	462	if (tb[IFLA_GRE_TOS])
	463	tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);
	464	if (tos) {
	465	if (is_json_context() \|\| tos != 1)
90c5c969	466	print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos);
3caa526c SP	467	else
3caa526c SP	468	print_string(PRINT_FP, NULL, "tos %s ", "inherit");
237d9e82 HX	469	}
237d9e82 HX	470
e2d45883 JF	471	if (tb[IFLA_GRE_PMTUDISC]) {
	472	if (!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
	473	print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
	474	else
	475	print_bool(PRINT_JSON, "pmtudisc", NULL, true);
	476	}
237d9e82	477
00ff4b8e SP	478	if (tb[IFLA_GRE_IGNORE_DF] && rta_getattr_u8(tb[IFLA_GRE_IGNORE_DF]))
	479	print_bool(PRINT_ANY, "ignore_df", "ignore-df ", true);
	480
237d9e82	481	if (tb[IFLA_GRE_IFLAGS])
ff24746c	482	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
237d9e82 HX	483
237d9e82 HX	484	if (tb[IFLA_GRE_OFLAGS])
ff24746c	485	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
237d9e82	486
71816553	487	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
237d9e82	488	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
e2d45883	489	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
237d9e82 HX	490	}
237d9e82 HX	491
71816553	492	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
237d9e82	493	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
e2d45883	494	print_string(PRINT_ANY, "okey", "okey %s ", s2);
237d9e82 HX	495	}
	496
	497	if (iflags & GRE_SEQ)
e2d45883	498	print_bool(PRINT_ANY, "iseq", "iseq ", true);
237d9e82	499	if (oflags & GRE_SEQ)
e2d45883	500	print_bool(PRINT_ANY, "oseq", "oseq ", true);
237d9e82	501	if (iflags & GRE_CSUM)
e2d45883	502	print_bool(PRINT_ANY, "icsum", "icsum ", true);
237d9e82	503	if (oflags & GRE_CSUM)
e2d45883 JF	504	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
	505
	506	if (tb[IFLA_GRE_FWMARK]) {
	507	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	508
	509	if (fwmark) {
e97ad3d2	510	print_0xhex(PRINT_ANY,
90c5c969	511	"fwmark", "fwmark %#llx ", fwmark);
e2d45883	512	}
ad4b1425	513	}
adbb2965	514
9a1381d5 WT	515	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
	516	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
	517
3cb92eb9 SP	518	print_uint(PRINT_ANY,
3cb92eb9 SP	519	"erspan_index", "erspan_index %u ", erspan_idx);
28976362 WT	520	}
	521
	522	if (tb[IFLA_GRE_ERSPAN_VER]) {
	523	__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);
	524
db2b8b6e SP	525	print_uint(PRINT_ANY,
db2b8b6e SP	526	"erspan_ver", "erspan_ver %u ", erspan_ver);
28976362 WT	527	}
	528
	529	if (tb[IFLA_GRE_ERSPAN_DIR]) {
	530	__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);
	531
	532	if (erspan_dir == 0)
	533	print_string(PRINT_ANY, "erspan_dir",
	534	"erspan_dir ingress ", NULL);
	535	else
	536	print_string(PRINT_ANY, "erspan_dir",
	537	"erspan_dir egress ", NULL);
	538	}
	539
	540	if (tb[IFLA_GRE_ERSPAN_HWID]) {
	541	__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);
	542
db2b8b6e	543	print_0xhex(PRINT_ANY,
90c5c969	544	"erspan_hwid", "erspan_hwid %#llx ", erspan_hwid);
9a1381d5 WT	545	}
9a1381d5 WT	546
bad76e6b SP	547	tnl_print_encap(tb,
	548	IFLA_GRE_ENCAP_TYPE,
	549	IFLA_GRE_ENCAP_FLAGS,
	550	IFLA_GRE_ENCAP_SPORT,
	551	IFLA_GRE_ENCAP_DPORT);
237d9e82 HX	552	}
	553
	554	struct link_util gre_link_util = {
	555	.id = "gre",
	556	.maxattr = IFLA_GRE_MAX,
	557	.parse_opt = gre_parse_opt,
	558	.print_opt = gre_print_opt,
561e650e	559	.print_help = gre_print_help,
237d9e82 HX	560	};
	561
	562	struct link_util gretap_link_util = {
	563	.id = "gretap",
	564	.maxattr = IFLA_GRE_MAX,
	565	.parse_opt = gre_parse_opt,
	566	.print_opt = gre_print_opt,
561e650e	567	.print_help = gre_print_help,
237d9e82	568	};
9a1381d5 WT	569
	570	struct link_util erspan_link_util = {
	571	.id = "erspan",
	572	.maxattr = IFLA_GRE_MAX,
	573	.parse_opt = gre_parse_opt,
	574	.print_opt = gre_print_opt,
	575	.print_help = gre_print_help,
	576	};