[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 bool gre_is_erspan(struct link_util *lu)
{
	return !strcmp(lu->id, "erspan");
}

static void gre_print_help(struct link_util *lu, int argc, char **argv, FILE *f)
{
	bool is_erspan = gre_is_erspan(lu);

	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", lu->id);
	if (is_erspan)
		fprintf(f,
			"			[ erspan_ver version ]\n"
			"			[ erspan IDX ]\n"
			"			[ erspan_dir { ingress | egress } ]\n"
			"			[ erspan_hwid hwid ]\n");
	fprintf(f,
		"\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");
}

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;
	bool is_erspan = gre_is_erspan(lu);
	__u32 erspan_idx = 0;
	__u8 erspan_ver = 1;
	__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 (is_erspan && 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 (is_erspan && strcmp(*argv, "erspan_ver") == 0) {
			NEXT_ARG();
			if (get_u8(&erspan_ver, *argv, 0))
				invarg("invalid erspan version\n", *argv);
			if (erspan_ver > 2)
				invarg("erspan version must be 0/1/2\n", *argv);
		} else if (is_erspan && 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 (is_erspan && 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 (is_erspan) {
		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
20927e05 PM	26	static bool gre_is_erspan(struct link_util *lu)
	27	{
	28	return !strcmp(lu->id, "erspan");
	29	}
	30
ae91205c	31	static void gre_print_help(struct link_util lu, int argc, char argv, FILE f)
561e650e	32	{
20927e05 PM	33	bool is_erspan = gre_is_erspan(lu);
20927e05 PM	34
8b471354	35	fprintf(f,
8589eb4e MC	36	"Usage: ... %-9s [ remote ADDR ]\n"
	37	" [ local ADDR ]\n"
	38	" [ [no][i\|o]seq ]\n"
	39	" [ [i\|o]key KEY \| no[i\|o]key ]\n"
	40	" [ [no][i\|o]csum ]\n"
	41	" [ ttl TTL ]\n"
	42	" [ tos TOS ]\n"
	43	" [ [no]pmtudisc ]\n"
	44	" [ [no]ignore-df ]\n"
	45	" [ dev PHYS_DEV ]\n"
	46	" [ fwmark MARK ]\n"
	47	" [ external ]\n"
	48	" [ noencap ]\n"
	49	" [ encap { fou \| gue \| none } ]\n"
	50	" [ encap-sport PORT ]\n"
	51	" [ encap-dport PORT ]\n"
	52	" [ [no]encap-csum ]\n"
	53	" [ [no]encap-csum6 ]\n"
20927e05 PM	54	" [ [no]encap-remcsum ]\n", lu->id);
	55	if (is_erspan)
	56	fprintf(f,
	57	" [ erspan_ver version ]\n"
	58	" [ erspan IDX ]\n"
	59	" [ erspan_dir { ingress \| egress } ]\n"
	60	" [ erspan_hwid hwid ]\n");
	61	fprintf(f,
8b471354	62	"\n"
8589eb4e MC	63	"Where: ADDR := { IP_ADDRESS \| any }\n"
	64	" TOS := { NUMBER \| inherit }\n"
	65	" TTL := { 1..255 \| inherit }\n"
	66	" KEY := { DOTTED_QUAD \| NUMBER }\n"
20927e05	67	" MARK := { 0x0..0xffffffff }\n");
561e650e	68	}
561e650e	69
237d9e82 HX	70	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	71	struct nlmsghdr *n)
	72	{
28254695	73	struct ifinfomsg *ifi = NLMSG_DATA(n);
72c771b2 HX	74	struct {
	75	struct nlmsghdr n;
	76	struct ifinfomsg i;
d17b136f PS	77	} req = {
	78	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	79	.n.nlmsg_flags = NLM_F_REQUEST,
	80	.n.nlmsg_type = RTM_GETLINK,
	81	.i.ifi_family = preferred_family,
	82	.i.ifi_index = ifi->ifi_index,
	83	};
08ede25f	84	struct nlmsghdr *answer;
72c771b2 HX	85	struct rtattr *tb[IFLA_MAX + 1];
	86	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	87	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
5bd93795	88	int len;
237d9e82 HX	89	__u16 iflags = 0;
237d9e82 HX	90	__u16 oflags = 0;
1f44b937 SP	91	__be32 ikey = 0;
1f44b937 SP	92	__be32 okey = 0;
a066cc66	93	inet_prefix saddr, daddr;
72c771b2	94	__u8 pmtudisc = 1;
5bd93795	95	__u8 ignore_df = 0;
72c771b2	96	__u8 tos = 0;
5bd93795 SP	97	__u8 ttl = 0;
5bd93795 SP	98	__u32 link = 0;
80c24b09 TH	99	__u16 encaptype = 0;
	100	__u16 encapflags = 0;
	101	__u16 encapsport = 0;
	102	__u16 encapdport = 0;
926b39e1	103	__u8 metadata = 0;
ad4b1425	104	__u32 fwmark = 0;
20927e05	105	bool is_erspan = gre_is_erspan(lu);
9a1381d5	106	__u32 erspan_idx = 0;
83c543af	107	__u8 erspan_ver = 1;
28976362 WT	108	__u8 erspan_dir = 0;
28976362 WT	109	__u16 erspan_hwid = 0;
72c771b2	110
a066cc66 SP	111	inet_prefix_reset(&saddr);
	112	inet_prefix_reset(&daddr);
	113
72c771b2	114	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
a066cc66 SP	115	const struct rtattr *rta;
a066cc66 SP	116
86bf43c7	117	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
72c771b2 HX	118	get_failed:
	119	fprintf(stderr,
	120	"Failed to get existing tunnel info.\n");
	121	return -1;
	122	}
	123
86bf43c7	124	len = answer->nlmsg_len;
72c771b2 HX	125	len -= NLMSG_LENGTH(sizeof(*ifi));
	126	if (len < 0)
	127	goto get_failed;
	128
86bf43c7	129	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
72c771b2 HX	130
	131	if (!tb[IFLA_LINKINFO])
	132	goto get_failed;
	133
	134	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	135
	136	if (!linkinfo[IFLA_INFO_DATA])
	137	goto get_failed;
	138
	139	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	140	linkinfo[IFLA_INFO_DATA]);
	141
a066cc66 SP	142	rta = greinfo[IFLA_GRE_LOCAL];
	143	if (rta && get_addr_rta(&saddr, rta, AF_INET))
	144	goto get_failed;
	145
	146	rta = greinfo[IFLA_GRE_REMOTE];
	147	if (rta && get_addr_rta(&daddr, rta, AF_INET))
	148	goto get_failed;
	149
72c771b2	150	if (greinfo[IFLA_GRE_IKEY])
ff24746c	151	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
72c771b2 HX	152
72c771b2 HX	153	if (greinfo[IFLA_GRE_OKEY])
ff24746c	154	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
72c771b2 HX	155
72c771b2 HX	156	if (greinfo[IFLA_GRE_IFLAGS])
ff24746c	157	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
72c771b2 HX	158
72c771b2 HX	159	if (greinfo[IFLA_GRE_OFLAGS])
ff24746c	160	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
72c771b2	161
72c771b2	162	if (greinfo[IFLA_GRE_PMTUDISC])
ff24746c	163	pmtudisc = rta_getattr_u8(
72c771b2 HX	164	greinfo[IFLA_GRE_PMTUDISC]);
72c771b2 HX	165
5bd93795 SP	166	if (greinfo[IFLA_GRE_IGNORE_DF])
	167	ignore_df =
	168	!!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]);
72c771b2 HX	169
72c771b2 HX	170	if (greinfo[IFLA_GRE_TOS])
ff24746c	171	tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]);
72c771b2	172
5bd93795 SP	173	if (greinfo[IFLA_GRE_TTL])
	174	ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	175
72c771b2	176	if (greinfo[IFLA_GRE_LINK])
a6addd5c	177	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
80c24b09 TH	178
	179	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	180	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
5bd93795	181
80c24b09 TH	182	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
80c24b09 TH	183	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
5bd93795	184
80c24b09 TH	185	if (greinfo[IFLA_GRE_ENCAP_SPORT])
80c24b09 TH	186	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
5bd93795	187
80c24b09 TH	188	if (greinfo[IFLA_GRE_ENCAP_DPORT])
80c24b09 TH	189	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
926b39e1 PA	190
	191	if (greinfo[IFLA_GRE_COLLECT_METADATA])
	192	metadata = 1;
ad4b1425 CG	193
	194	if (greinfo[IFLA_GRE_FWMARK])
	195	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
9a1381d5 WT	196
	197	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	198	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
86bf43c7	199
28976362 WT	200	if (greinfo[IFLA_GRE_ERSPAN_VER])
	201	erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);
	202
	203	if (greinfo[IFLA_GRE_ERSPAN_DIR])
	204	erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);
	205
	206	if (greinfo[IFLA_GRE_ERSPAN_HWID])
	207	erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);
	208
86bf43c7	209	free(answer);
72c771b2	210	}
237d9e82 HX	211
	212	while (argc > 0) {
	213	if (!matches(*argv, "key")) {
237d9e82 HX	214	NEXT_ARG();
	215	iflags \|= GRE_KEY;
	216	oflags \|= GRE_KEY;
1f44b937	217	ikey = okey = tnl_parse_key("key", *argv);
7f520601 SD	218	} else if (!matches(*argv, "nokey")) {
	219	iflags &= ~GRE_KEY;
	220	oflags &= ~GRE_KEY;
	221	ikey = okey = 0;
237d9e82	222	} else if (!matches(*argv, "ikey")) {
237d9e82 HX	223	NEXT_ARG();
237d9e82 HX	224	iflags \|= GRE_KEY;
1f44b937	225	ikey = tnl_parse_key("ikey", *argv);
7f520601 SD	226	} else if (!matches(*argv, "noikey")) {
	227	iflags &= ~GRE_KEY;
	228	ikey = 0;
237d9e82	229	} else if (!matches(*argv, "okey")) {
237d9e82 HX	230	NEXT_ARG();
237d9e82 HX	231	oflags \|= GRE_KEY;
1f44b937	232	okey = tnl_parse_key("okey", *argv);
7f520601 SD	233	} else if (!matches(*argv, "nookey")) {
	234	oflags &= ~GRE_KEY;
	235	okey = 0;
237d9e82 HX	236	} else if (!matches(*argv, "seq")) {
	237	iflags \|= GRE_SEQ;
	238	oflags \|= GRE_SEQ;
7f520601 SD	239	} else if (!matches(*argv, "noseq")) {
	240	iflags &= ~GRE_SEQ;
	241	oflags &= ~GRE_SEQ;
237d9e82 HX	242	} else if (!matches(*argv, "iseq")) {
237d9e82 HX	243	iflags \|= GRE_SEQ;
7f520601 SD	244	} else if (!matches(*argv, "noiseq")) {
7f520601 SD	245	iflags &= ~GRE_SEQ;
237d9e82 HX	246	} else if (!matches(*argv, "oseq")) {
237d9e82 HX	247	oflags \|= GRE_SEQ;
7f520601 SD	248	} else if (!matches(*argv, "nooseq")) {
7f520601 SD	249	oflags &= ~GRE_SEQ;
237d9e82 HX	250	} else if (!matches(*argv, "csum")) {
	251	iflags \|= GRE_CSUM;
	252	oflags \|= GRE_CSUM;
7f520601 SD	253	} else if (!matches(*argv, "nocsum")) {
	254	iflags &= ~GRE_CSUM;
	255	oflags &= ~GRE_CSUM;
237d9e82 HX	256	} else if (!matches(*argv, "icsum")) {
237d9e82 HX	257	iflags \|= GRE_CSUM;
7f520601 SD	258	} else if (!matches(*argv, "noicsum")) {
7f520601 SD	259	iflags &= ~GRE_CSUM;
237d9e82 HX	260	} else if (!matches(*argv, "ocsum")) {
237d9e82 HX	261	oflags \|= GRE_CSUM;
7f520601 SD	262	} else if (!matches(*argv, "noocsum")) {
7f520601 SD	263	oflags &= ~GRE_CSUM;
237d9e82	264	} else if (!matches(*argv, "nopmtudisc")) {
72c771b2	265	pmtudisc = 0;
237d9e82	266	} else if (!matches(*argv, "pmtudisc")) {
72c771b2	267	pmtudisc = 1;
237d9e82 HX	268	} else if (!matches(*argv, "remote")) {
237d9e82 HX	269	NEXT_ARG();
a066cc66	270	get_addr(&daddr, *argv, AF_INET);
237d9e82 HX	271	} else if (!matches(*argv, "local")) {
237d9e82 HX	272	NEXT_ARG();
a066cc66	273	get_addr(&saddr, *argv, AF_INET);
237d9e82	274	} else if (!matches(*argv, "dev")) {
237d9e82	275	NEXT_ARG();
7a14358b	276	link = ll_name_to_index(*argv);
fe99adbc SP	277	if (!link)
fe99adbc SP	278	exit(nodev(*argv));
237d9e82	279	} else if (!matches(*argv, "ttl") \|\|
c4743c4d SP	280	!matches(*argv, "hoplimit") \|\|
c4743c4d SP	281	!matches(*argv, "hlim")) {
237d9e82 HX	282	NEXT_ARG();
237d9e82 HX	283	if (strcmp(*argv, "inherit") != 0) {
c4743c4d	284	if (get_u8(&ttl, *argv, 0))
237d9e82	285	invarg("invalid TTL\n", *argv);
079e6781 RS	286	} else
079e6781 RS	287	ttl = 0;
237d9e82 HX	288	} else if (!matches(*argv, "tos") \|\|
	289	!matches(*argv, "tclass") \|\|
	290	!matches(*argv, "dsfield")) {
	291	__u32 uval;
237d9e82 HX	292
	293	NEXT_ARG();
	294	if (strcmp(*argv, "inherit") != 0) {
	295	if (rtnl_dsfield_a2n(&uval, *argv))
	296	invarg("bad TOS value", *argv);
	297	tos = uval;
	298	} else
	299	tos = 1;
80c24b09 TH	300	} else if (strcmp(*argv, "noencap") == 0) {
	301	encaptype = TUNNEL_ENCAP_NONE;
	302	} else if (strcmp(*argv, "encap") == 0) {
	303	NEXT_ARG();
	304	if (strcmp(*argv, "fou") == 0)
	305	encaptype = TUNNEL_ENCAP_FOU;
	306	else if (strcmp(*argv, "gue") == 0)
	307	encaptype = TUNNEL_ENCAP_GUE;
	308	else if (strcmp(*argv, "none") == 0)
	309	encaptype = TUNNEL_ENCAP_NONE;
	310	else
	311	invarg("Invalid encap type.", *argv);
	312	} else if (strcmp(*argv, "encap-sport") == 0) {
	313	NEXT_ARG();
	314	if (strcmp(*argv, "auto") == 0)
	315	encapsport = 0;
	316	else if (get_u16(&encapsport, *argv, 0))
	317	invarg("Invalid source port.", *argv);
	318	} else if (strcmp(*argv, "encap-dport") == 0) {
	319	NEXT_ARG();
	320	if (get_u16(&encapdport, *argv, 0))
	321	invarg("Invalid destination port.", *argv);
	322	} else if (strcmp(*argv, "encap-csum") == 0) {
	323	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	324	} else if (strcmp(*argv, "noencap-csum") == 0) {
	325	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	326	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	327	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	328	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
147ade01	329	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
858dbb20 TH	330	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	331	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	332	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
147ade01	333	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
926b39e1 PA	334	} else if (strcmp(*argv, "external") == 0) {
926b39e1 PA	335	metadata = 1;
adbb2965 PP	336	} else if (strcmp(*argv, "ignore-df") == 0) {
	337	ignore_df = 1;
	338	} else if (strcmp(*argv, "noignore-df") == 0) {
	339	/*
	340	*only the lsb is significant, use 2 for presence
	341	*/
	342	ignore_df = 2;
ad4b1425 CG	343	} else if (strcmp(*argv, "fwmark") == 0) {
	344	NEXT_ARG();
	345	if (get_u32(&fwmark, *argv, 0))
	346	invarg("invalid fwmark\n", *argv);
20927e05	347	} else if (is_erspan && strcmp(*argv, "erspan") == 0) {
9a1381d5 WT	348	NEXT_ARG();
	349	if (get_u32(&erspan_idx, *argv, 0))
	350	invarg("invalid erspan index\n", *argv);
	351	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	352	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
20927e05	353	} else if (is_erspan && strcmp(*argv, "erspan_ver") == 0) {
28976362 WT	354	NEXT_ARG();
	355	if (get_u8(&erspan_ver, *argv, 0))
	356	invarg("invalid erspan version\n", *argv);
846b6b2d WT	357	if (erspan_ver > 2)
846b6b2d WT	358	invarg("erspan version must be 0/1/2\n", *argv);
20927e05	359	} else if (is_erspan && strcmp(*argv, "erspan_dir") == 0) {
28976362 WT	360	NEXT_ARG();
	361	if (matches(*argv, "ingress") == 0)
	362	erspan_dir = 0;
	363	else if (matches(*argv, "egress") == 0)
	364	erspan_dir = 1;
	365	else
	366	invarg("Invalid erspan direction.", *argv);
20927e05	367	} else if (is_erspan && strcmp(*argv, "erspan_hwid") == 0) {
28976362 WT	368	NEXT_ARG();
	369	if (get_u16(&erspan_hwid, *argv, 0))
	370	invarg("invalid erspan hwid\n", *argv);
ae91205c SP	371	} else {
	372	gre_print_help(lu, argc, argv, stderr);
	373	return -1;
	374	}
237d9e82 HX	375	argc--; argv++;
	376	}
	377
a066cc66 SP	378	if (is_addrtype_inet_multi(&daddr)) {
	379	if (!ikey) {
	380	ikey = daddr.data[0];
	381	iflags \|= GRE_KEY;
	382	}
	383	if (!okey) {
	384	okey = daddr.data[0];
	385	oflags \|= GRE_KEY;
	386	}
	387	if (!is_addrtype_inet_not_unspec(&saddr)) {
	388	fprintf(stderr,
	389	"A broadcast tunnel requires a source address.\n");
	390	return -1;
	391	}
237d9e82 HX	392	}
237d9e82 HX	393
5bd93795	394	if (metadata) {
df217d5d	395	addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
5bd93795	396	return 0;
df217d5d	397	}
237d9e82	398
5bd93795 SP	399	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	400	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	401	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	402	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
fa1e658e	403	if (is_addrtype_inet_not_unspec(&saddr))
a066cc66	404	addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
fa1e658e	405	if (is_addrtype_inet_not_unspec(&daddr))
a066cc66	406	addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
5bd93795 SP	407	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
	408	if (ignore_df)
	409	addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);
	410	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
	411	if (link)
	412	addattr32(n, 1024, IFLA_GRE_LINK, link);
	413	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
	414	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
20927e05	415	if (is_erspan) {
5bd93795 SP	416	addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
	417	if (erspan_ver == 1 && erspan_idx != 0) {
	418	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
	419	} else if (erspan_ver == 2) {
	420	addattr8(n, 1024, IFLA_GRE_ERSPAN_DIR, erspan_dir);
	421	addattr16(n, 1024, IFLA_GRE_ERSPAN_HWID, erspan_hwid);
	422	}
	423	}
	424	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	425	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	426	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	427	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	428
237d9e82 HX	429	return 0;
	430	}
	431
00ff4b8e	432	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
237d9e82	433	{
237d9e82	434	char s2[64];
5bd93795 SP	435	__u16 iflags = 0;
5bd93795 SP	436	__u16 oflags = 0;
375560c4	437	__u8 ttl = 0;
3caa526c	438	__u8 tos = 0;
237d9e82	439
00ff4b8e SP	440	if (!tb)
	441	return;
	442
	443	if (tb[IFLA_GRE_COLLECT_METADATA]) {
d6abae5a	444	print_bool(PRINT_ANY, "external", "external ", true);
00ff4b8e SP	445	return;
	446	}
	447
b761fc41 SP	448	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET);
b761fc41 SP	449	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET);
237d9e82	450
45d3a6ef	451	if (tb[IFLA_GRE_LINK]) {
5bd93795	452	__u32 link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
237d9e82	453
45d3a6ef SP	454	if (link) {
	455	print_string(PRINT_ANY, "link", "dev %s ",
	456	ll_index_to_name(link));
	457	}
237d9e82 HX	458	}
237d9e82 HX	459
375560c4 SP	460	if (tb[IFLA_GRE_TTL])
	461	ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	462	if (is_json_context() \|\| ttl)
	463	print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
	464	else
e2d45883	465	print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
e2d45883	466
3caa526c SP	467	if (tb[IFLA_GRE_TOS])
	468	tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);
	469	if (tos) {
	470	if (is_json_context() \|\| tos != 1)
90c5c969	471	print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos);
3caa526c SP	472	else
3caa526c SP	473	print_string(PRINT_FP, NULL, "tos %s ", "inherit");
237d9e82 HX	474	}
237d9e82 HX	475
e2d45883 JF	476	if (tb[IFLA_GRE_PMTUDISC]) {
	477	if (!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
	478	print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
	479	else
	480	print_bool(PRINT_JSON, "pmtudisc", NULL, true);
	481	}
237d9e82	482
00ff4b8e SP	483	if (tb[IFLA_GRE_IGNORE_DF] && rta_getattr_u8(tb[IFLA_GRE_IGNORE_DF]))
	484	print_bool(PRINT_ANY, "ignore_df", "ignore-df ", true);
	485
237d9e82	486	if (tb[IFLA_GRE_IFLAGS])
ff24746c	487	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
237d9e82 HX	488
237d9e82 HX	489	if (tb[IFLA_GRE_OFLAGS])
ff24746c	490	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
237d9e82	491
71816553	492	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
237d9e82	493	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
e2d45883	494	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
237d9e82 HX	495	}
237d9e82 HX	496
71816553	497	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
237d9e82	498	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
e2d45883	499	print_string(PRINT_ANY, "okey", "okey %s ", s2);
237d9e82 HX	500	}
	501
	502	if (iflags & GRE_SEQ)
e2d45883	503	print_bool(PRINT_ANY, "iseq", "iseq ", true);
237d9e82	504	if (oflags & GRE_SEQ)
e2d45883	505	print_bool(PRINT_ANY, "oseq", "oseq ", true);
237d9e82	506	if (iflags & GRE_CSUM)
e2d45883	507	print_bool(PRINT_ANY, "icsum", "icsum ", true);
237d9e82	508	if (oflags & GRE_CSUM)
e2d45883 JF	509	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
	510
	511	if (tb[IFLA_GRE_FWMARK]) {
	512	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	513
	514	if (fwmark) {
e97ad3d2	515	print_0xhex(PRINT_ANY,
90c5c969	516	"fwmark", "fwmark %#llx ", fwmark);
e2d45883	517	}
ad4b1425	518	}
adbb2965	519
9a1381d5 WT	520	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
	521	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
	522
3cb92eb9 SP	523	print_uint(PRINT_ANY,
3cb92eb9 SP	524	"erspan_index", "erspan_index %u ", erspan_idx);
28976362 WT	525	}
	526
	527	if (tb[IFLA_GRE_ERSPAN_VER]) {
	528	__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);
	529
db2b8b6e SP	530	print_uint(PRINT_ANY,
db2b8b6e SP	531	"erspan_ver", "erspan_ver %u ", erspan_ver);
28976362 WT	532	}
	533
	534	if (tb[IFLA_GRE_ERSPAN_DIR]) {
	535	__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);
	536
	537	if (erspan_dir == 0)
	538	print_string(PRINT_ANY, "erspan_dir",
	539	"erspan_dir ingress ", NULL);
	540	else
	541	print_string(PRINT_ANY, "erspan_dir",
	542	"erspan_dir egress ", NULL);
	543	}
	544
	545	if (tb[IFLA_GRE_ERSPAN_HWID]) {
	546	__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);
	547
db2b8b6e	548	print_0xhex(PRINT_ANY,
90c5c969	549	"erspan_hwid", "erspan_hwid %#llx ", erspan_hwid);
9a1381d5 WT	550	}
9a1381d5 WT	551
bad76e6b SP	552	tnl_print_encap(tb,
	553	IFLA_GRE_ENCAP_TYPE,
	554	IFLA_GRE_ENCAP_FLAGS,
	555	IFLA_GRE_ENCAP_SPORT,
	556	IFLA_GRE_ENCAP_DPORT);
237d9e82 HX	557	}
	558
	559	struct link_util gre_link_util = {
	560	.id = "gre",
	561	.maxattr = IFLA_GRE_MAX,
	562	.parse_opt = gre_parse_opt,
	563	.print_opt = gre_print_opt,
561e650e	564	.print_help = gre_print_help,
237d9e82 HX	565	};
	566
	567	struct link_util gretap_link_util = {
	568	.id = "gretap",
	569	.maxattr = IFLA_GRE_MAX,
	570	.parse_opt = gre_parse_opt,
	571	.print_opt = gre_print_opt,
561e650e	572	.print_help = gre_print_help,
237d9e82	573	};
9a1381d5 WT	574
	575	struct link_util erspan_link_util = {
	576	.id = "erspan",
	577	.maxattr = IFLA_GRE_MAX,
	578	.parse_opt = gre_parse_opt,
	579	.print_opt = gre_print_opt,
	580	.print_help = gre_print_help,
	581	};