[mirror_iproute2.git] / ip / link_gre6.c

/*
 * link_gre6.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:	Dmitry Kozlov <xeb@mail.ru>
 *
 */

#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 <linux/ip6_tunnel.h>

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

#define IP6_FLOWINFO_TCLASS	htonl(0x0FF00000)
#define IP6_FLOWINFO_FLOWLABEL	htonl(0x000FFFFF)

#define DEFAULT_TNL_HOP_LIMIT	(64)

static void print_usage(FILE *f)
{
	fprintf(f,
		"Usage: ... { ip6gre | ip6gretap | ip6erspan} [ remote ADDR ]\n"
		"                                  [ local ADDR ]\n"
		"                                  [ [i|o]seq ]\n"
		"                                  [ [i|o]key KEY ]\n"
		"                                  [ [i|o]csum ]\n"
		"                                  [ hoplimit TTL ]\n"
		"                                  [ encaplimit ELIM ]\n"
		"                                  [ tclass TCLASS ]\n"
		"                                  [ flowlabel FLOWLABEL ]\n"
		"                                  [ dscp inherit ]\n"
		"                                  [ fwmark MARK ]\n"
		"                                  [ dev PHYS_DEV ]\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 IDX ]\n"
		"\n"
		"Where: ADDR      := IPV6_ADDRESS\n"
		"       TTL       := { 0..255 } (default=%d)\n"
		"       KEY       := { DOTTED_QUAD | NUMBER }\n"
		"       ELIM      := { none | 0..255 }(default=%d)\n"
		"       TCLASS    := { 0x0..0xff | inherit }\n"
		"       FLOWLABEL := { 0x0..0xfffff | inherit }\n"
		"       MARK      := { 0x0..0xffffffff | inherit }\n",
		DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
	);
}

static void usage(void) __attribute__((noreturn));
static void usage(void)
{
	print_usage(stderr);
	exit(-1);
}

static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
			 struct nlmsghdr *n)
{
	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
	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];
	__u16 iflags = 0;
	__u16 oflags = 0;
	__be32 ikey = 0;
	__be32 okey = 0;
	struct in6_addr raddr = IN6ADDR_ANY_INIT;
	struct in6_addr laddr = IN6ADDR_ANY_INIT;
	unsigned int link = 0;
	unsigned int flowinfo = 0;
	unsigned int flags = 0;
	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	__u16 encaptype = 0;
	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	__u16 encapsport = 0;
	__u16 encapdport = 0;
	int len;
	__u32 fwmark = 0;
	__u32 erspan_idx = 0;

	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
		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]);

		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_LOCAL])
			memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr));

		if (greinfo[IFLA_GRE_REMOTE])
			memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr));

		if (greinfo[IFLA_GRE_TTL])
			hop_limit = 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_LIMIT])
			encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);

		if (greinfo[IFLA_GRE_FLOWINFO])
			flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);

		if (greinfo[IFLA_GRE_FLAGS])
			flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);

		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_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]);

		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, "ikey")) {
			NEXT_ARG();
			iflags |= GRE_KEY;
			ikey = tnl_parse_key("ikey", *argv);
		} else if (!matches(*argv, "okey")) {
			NEXT_ARG();
			oflags |= GRE_KEY;
			okey = tnl_parse_key("okey", *argv);
		} else if (!matches(*argv, "seq")) {
			iflags |= GRE_SEQ;
			oflags |= GRE_SEQ;
		} else if (!matches(*argv, "iseq")) {
			iflags |= GRE_SEQ;
		} else if (!matches(*argv, "oseq")) {
			oflags |= GRE_SEQ;
		} else if (!matches(*argv, "csum")) {
			iflags |= GRE_CSUM;
			oflags |= GRE_CSUM;
		} else if (!matches(*argv, "icsum")) {
			iflags |= GRE_CSUM;
		} else if (!matches(*argv, "ocsum")) {
			oflags |= GRE_CSUM;
		} else if (!matches(*argv, "remote")) {
			inet_prefix addr;

			NEXT_ARG();
			get_addr(&addr, *argv, AF_INET6);
			memcpy(&raddr, &addr.data, sizeof(raddr));
		} else if (!matches(*argv, "local")) {
			inet_prefix addr;

			NEXT_ARG();
			get_addr(&addr, *argv, AF_INET6);
			memcpy(&laddr, &addr.data, sizeof(laddr));
		} else if (!matches(*argv, "dev")) {
			NEXT_ARG();
			link = ll_name_to_index(*argv);
			if (link == 0) {
				fprintf(stderr, "Cannot find device \"%s\"\n",
					*argv);
				exit(-1);
			}
		} else if (!matches(*argv, "ttl") ||
			   !matches(*argv, "hoplimit") ||
			   !matches(*argv, "hlim")) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (get_u8(&hop_limit, *argv, 0))
					invarg("invalid HLIM\n", *argv);
			} else
				hop_limit = 0;
		} else if (!matches(*argv, "tos") ||
			   !matches(*argv, "tclass") ||
			   !matches(*argv, "dsfield")) {
			__u8 uval;

			NEXT_ARG();
			flowinfo &= ~IP6_FLOWINFO_TCLASS;
			if (strcmp(*argv, "inherit") == 0)
				flags |= IP6_TNL_F_USE_ORIG_TCLASS;
			else {
				if (get_u8(&uval, *argv, 16))
					invarg("invalid TClass", *argv);
				flowinfo |= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
				flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
			}
		} else if (strcmp(*argv, "flowlabel") == 0 ||
			   strcmp(*argv, "fl") == 0) {
			__u32 uval;

			NEXT_ARG();
			flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
			if (strcmp(*argv, "inherit") == 0)
				flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL;
			else {
				if (get_u32(&uval, *argv, 16))
					invarg("invalid Flowlabel", *argv);
				if (uval > 0xFFFFF)
					invarg("invalid Flowlabel", *argv);
				flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
				flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
			}
		} else if (strcmp(*argv, "dscp") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0)
				invarg("not inherit", *argv);
			flags |= IP6_TNL_F_RCV_DSCP_COPY;
		} 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, "fwmark") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") == 0) {
				flags |= IP6_TNL_F_USE_ORIG_FWMARK;
				fwmark = 0;
			} else {
				if (get_u32(&fwmark, *argv, 0))
					invarg("invalid fwmark\n", *argv);
				flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
			}
		} else if (strcmp(*argv, "encaplimit") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "none") == 0) {
				flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
			} else {
				__u8 uval;

				if (get_u8(&uval, *argv, 0))
					invarg("invalid ELIM", *argv);
				encap_limit = uval;
				flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
			}
		} 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
			usage();
		argc--; argv++;
	}

	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);
	addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr));
	addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr));
	if (link)
		addattr32(n, 1024, IFLA_GRE_LINK, link);
	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
	if (erspan_idx != 0)
		addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);

	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];
	const char *local = "any";
	const char *remote = "any";
	unsigned int iflags = 0;
	unsigned int oflags = 0;
	unsigned int flags = 0;
	__u32 flowinfo = 0;
	struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;
	__u8 ttl = 0;

	if (!tb)
		return;

	if (tb[IFLA_GRE_FLAGS])
		flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);

	if (tb[IFLA_GRE_FLOWINFO])
		flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);

	if (tb[IFLA_GRE_REMOTE]) {
		struct in6_addr addr;

		memcpy(&addr, RTA_DATA(tb[IFLA_GRE_REMOTE]), sizeof(addr));

		if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
			remote = format_host(AF_INET6, sizeof(addr), &addr);
	}

	print_string(PRINT_ANY, "remote", "remote %s ", remote);

	if (tb[IFLA_GRE_LOCAL]) {
		struct in6_addr addr;

		memcpy(&addr, RTA_DATA(tb[IFLA_GRE_LOCAL]), sizeof(addr));

		if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
			local = format_host(AF_INET6, sizeof(addr), &addr);
	}

	print_string(PRINT_ANY, "local", "local %s ", local);

	if (tb[IFLA_GRE_LINK]) {
		unsigned int 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", "hoplimit %u ", ttl);
	else
		print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit");

	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_ign_encap_limit",
			   "encaplimit none ",
			   true);
	} else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
		__u8 val = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);

		print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
	}

	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_tclass",
			   "tclass inherit ",
			   true);
	} else if (tb[IFLA_GRE_FLOWINFO]) {
		__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;

		snprintf(s2, sizeof(s2), "0x%02x", val);
		print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
	}

	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_flowlabel",
			   "flowlabel inherit ",
			   true);
	} else if (tb[IFLA_GRE_FLOWINFO]) {
		__u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);

		snprintf(s2, sizeof(s2), "0x%05x", val);
		print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
	}

	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_rcv_dscp_copy",
			   "dscp inherit ",
			   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 (flags & IP6_TNL_F_USE_ORIG_FWMARK) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_fwmark",
			   "fwmark inherit ",
			   true);
	} else if (tb[IFLA_GRE_FWMARK]) {
		__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);

		if (fwmark) {
			print_0xhex(PRINT_ANY,
				    "fwmark", "fwmark 0x%x ", 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);
	}

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

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

struct link_util ip6gre_link_util = {
	.id = "ip6gre",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};

struct link_util ip6gretap_link_util = {
	.id = "ip6gretap",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};

struct link_util ip6erspan_link_util = {
	.id = "ip6erspan",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};
Commit	Line	Data
af89576d	1	/*
	2	* link_gre6.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: Dmitry Kozlov <xeb@mail.ru>
	10	*
	11	*/
	12
	13	#include <string.h>
	14	#include <net/if.h>
	15	#include <sys/types.h>
	16	#include <sys/socket.h>
	17	#include <arpa/inet.h>
	18
	19	#include <linux/ip.h>
	20	#include <linux/if_tunnel.h>
	21	#include <linux/ip6_tunnel.h>
	22
	23	#include "rt_names.h"
	24	#include "utils.h"
	25	#include "ip_common.h"
	26	#include "tunnel.h"
	27
	28	#define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
	29	#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF)
	30
	31	#define DEFAULT_TNL_HOP_LIMIT (64)
	32
561e650e	33	static void print_usage(FILE *f)
af89576d	34	{
8b471354	35	fprintf(f,
8595cc40	36	"Usage: ... { ip6gre \| ip6gretap \| ip6erspan} [ remote ADDR ]\n"
8b471354 PS	37	" [ local ADDR ]\n"
	38	" [ [i\|o]seq ]\n"
	39	" [ [i\|o]key KEY ]\n"
	40	" [ [i\|o]csum ]\n"
	41	" [ hoplimit TTL ]\n"
	42	" [ encaplimit ELIM ]\n"
	43	" [ tclass TCLASS ]\n"
	44	" [ flowlabel FLOWLABEL ]\n"
	45	" [ dscp inherit ]\n"
ad4b1425	46	" [ fwmark MARK ]\n"
8b471354 PS	47	" [ dev PHYS_DEV ]\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"
	54	" [ [no]encap-remcsum ]\n"
8595cc40	55	" [ erspan IDX ]\n"
8b471354 PS	56	"\n"
	57	"Where: ADDR := IPV6_ADDRESS\n"
	58	" TTL := { 0..255 } (default=%d)\n"
	59	" KEY := { DOTTED_QUAD \| NUMBER }\n"
	60	" ELIM := { none \| 0..255 }(default=%d)\n"
	61	" TCLASS := { 0x0..0xff \| inherit }\n"
ad4b1425 CG	62	" FLOWLABEL := { 0x0..0xfffff \| inherit }\n"
ad4b1425 CG	63	" MARK := { 0x0..0xffffffff \| inherit }\n",
8b471354 PS	64	DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
8b471354 PS	65	);
561e650e	66	}
	67
	68	static void usage(void) __attribute__((noreturn));
	69	static void usage(void)
	70	{
	71	print_usage(stderr);
af89576d	72	exit(-1);
	73	}
	74
	75	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	76	struct nlmsghdr *n)
	77	{
d17b136f	78	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
af89576d	79	struct {
	80	struct nlmsghdr n;
	81	struct ifinfomsg i;
d17b136f PS	82	} req = {
	83	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	84	.n.nlmsg_flags = NLM_F_REQUEST,
	85	.n.nlmsg_type = RTM_GETLINK,
	86	.i.ifi_family = preferred_family,
	87	.i.ifi_index = ifi->ifi_index,
	88	};
08ede25f	89	struct nlmsghdr *answer;
af89576d	90	struct rtattr *tb[IFLA_MAX + 1];
	91	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	92	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
	93	__u16 iflags = 0;
	94	__u16 oflags = 0;
1f44b937 SP	95	__be32 ikey = 0;
1f44b937 SP	96	__be32 okey = 0;
af89576d	97	struct in6_addr raddr = IN6ADDR_ANY_INIT;
af89576d	98	struct in6_addr laddr = IN6ADDR_ANY_INIT;
56f5daac SH	99	unsigned int link = 0;
	100	unsigned int flowinfo = 0;
	101	unsigned int flags = 0;
af89576d	102	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
af89576d	103	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
0b2fbb73 TH	104	__u16 encaptype = 0;
	105	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	106	__u16 encapsport = 0;
	107	__u16 encapdport = 0;
af89576d	108	int len;
ad4b1425	109	__u32 fwmark = 0;
8595cc40	110	__u32 erspan_idx = 0;
af89576d	111
af89576d	112	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
86bf43c7	113	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
af89576d	114	get_failed:
	115	fprintf(stderr,
	116	"Failed to get existing tunnel info.\n");
	117	return -1;
	118	}
	119
86bf43c7	120	len = answer->nlmsg_len;
af89576d	121	len -= NLMSG_LENGTH(sizeof(*ifi));
	122	if (len < 0)
	123	goto get_failed;
	124
86bf43c7	125	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
af89576d	126
	127	if (!tb[IFLA_LINKINFO])
	128	goto get_failed;
	129
	130	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	131
	132	if (!linkinfo[IFLA_INFO_DATA])
	133	goto get_failed;
	134
	135	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	136	linkinfo[IFLA_INFO_DATA]);
	137
	138	if (greinfo[IFLA_GRE_IKEY])
	139	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
	140
	141	if (greinfo[IFLA_GRE_OKEY])
	142	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
	143
	144	if (greinfo[IFLA_GRE_IFLAGS])
	145	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
	146
	147	if (greinfo[IFLA_GRE_OFLAGS])
	148	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
	149
	150	if (greinfo[IFLA_GRE_LOCAL])
	151	memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr));
	152
	153	if (greinfo[IFLA_GRE_REMOTE])
	154	memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr));
	155
	156	if (greinfo[IFLA_GRE_TTL])
	157	hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	158
	159	if (greinfo[IFLA_GRE_LINK])
	160	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
	161
	162	if (greinfo[IFLA_GRE_ENCAP_LIMIT])
	163	encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);
	164
	165	if (greinfo[IFLA_GRE_FLOWINFO])
	166	flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);
	167
	168	if (greinfo[IFLA_GRE_FLAGS])
	169	flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);
0b2fbb73 TH	170
	171	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	172	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	173
	174	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	175	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	176
	177	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	178	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	179
	180	if (greinfo[IFLA_GRE_ENCAP_DPORT])
	181	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
ad4b1425 CG	182
	183	if (greinfo[IFLA_GRE_FWMARK])
	184	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
86bf43c7	185
8595cc40 WT	186	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	187	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
	188
86bf43c7	189	free(answer);
af89576d	190	}
	191
	192	while (argc > 0) {
	193	if (!matches(*argv, "key")) {
af89576d	194	NEXT_ARG();
	195	iflags \|= GRE_KEY;
	196	oflags \|= GRE_KEY;
1f44b937	197	ikey = okey = tnl_parse_key("key", *argv);
af89576d	198	} else if (!matches(*argv, "ikey")) {
af89576d	199	NEXT_ARG();
af89576d	200	iflags \|= GRE_KEY;
1f44b937	201	ikey = tnl_parse_key("ikey", *argv);
af89576d	202	} else if (!matches(*argv, "okey")) {
af89576d	203	NEXT_ARG();
af89576d	204	oflags \|= GRE_KEY;
1f44b937	205	okey = tnl_parse_key("okey", *argv);
af89576d	206	} else if (!matches(*argv, "seq")) {
	207	iflags \|= GRE_SEQ;
	208	oflags \|= GRE_SEQ;
	209	} else if (!matches(*argv, "iseq")) {
	210	iflags \|= GRE_SEQ;
	211	} else if (!matches(*argv, "oseq")) {
	212	oflags \|= GRE_SEQ;
	213	} else if (!matches(*argv, "csum")) {
	214	iflags \|= GRE_CSUM;
	215	oflags \|= GRE_CSUM;
	216	} else if (!matches(*argv, "icsum")) {
	217	iflags \|= GRE_CSUM;
	218	} else if (!matches(*argv, "ocsum")) {
	219	oflags \|= GRE_CSUM;
	220	} else if (!matches(*argv, "remote")) {
	221	inet_prefix addr;
56f5daac	222
af89576d	223	NEXT_ARG();
9aceaad7	224	get_addr(&addr, *argv, AF_INET6);
af89576d	225	memcpy(&raddr, &addr.data, sizeof(raddr));
	226	} else if (!matches(*argv, "local")) {
	227	inet_prefix addr;
56f5daac	228
af89576d	229	NEXT_ARG();
9aceaad7	230	get_addr(&addr, *argv, AF_INET6);
af89576d	231	memcpy(&laddr, &addr.data, sizeof(laddr));
	232	} else if (!matches(*argv, "dev")) {
	233	NEXT_ARG();
7a14358b	234	link = ll_name_to_index(*argv);
0cb6bb51 CW	235	if (link == 0) {
	236	fprintf(stderr, "Cannot find device \"%s\"\n",
	237	*argv);
af89576d	238	exit(-1);
0cb6bb51	239	}
af89576d	240	} else if (!matches(*argv, "ttl") \|\|
c4743c4d SP	241	!matches(*argv, "hoplimit") \|\|
c4743c4d SP	242	!matches(*argv, "hlim")) {
af89576d	243	NEXT_ARG();
c4743c4d SP	244	if (strcmp(*argv, "inherit") != 0) {
	245	if (get_u8(&hop_limit, *argv, 0))
	246	invarg("invalid HLIM\n", *argv);
	247	} else
	248	hop_limit = 0;
af89576d	249	} else if (!matches(*argv, "tos") \|\|
	250	!matches(*argv, "tclass") \|\|
	251	!matches(*argv, "dsfield")) {
	252	__u8 uval;
56f5daac	253
af89576d	254	NEXT_ARG();
afdf9277	255	flowinfo &= ~IP6_FLOWINFO_TCLASS;
af89576d	256	if (strcmp(*argv, "inherit") == 0)
	257	flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	258	else {
	259	if (get_u8(&uval, *argv, 16))
	260	invarg("invalid TClass", *argv);
	261	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	262	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	263	}
	264	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	265	strcmp(*argv, "fl") == 0) {
	266	__u32 uval;
56f5daac	267
af89576d	268	NEXT_ARG();
afdf9277	269	flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
af89576d	270	if (strcmp(*argv, "inherit") == 0)
	271	flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	272	else {
	273	if (get_u32(&uval, *argv, 16))
	274	invarg("invalid Flowlabel", *argv);
	275	if (uval > 0xFFFFF)
	276	invarg("invalid Flowlabel", *argv);
	277	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	278	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	279	}
	280	} else if (strcmp(*argv, "dscp") == 0) {
	281	NEXT_ARG();
	282	if (strcmp(*argv, "inherit") != 0)
	283	invarg("not inherit", *argv);
	284	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
0b2fbb73 TH	285	} else if (strcmp(*argv, "noencap") == 0) {
	286	encaptype = TUNNEL_ENCAP_NONE;
	287	} else if (strcmp(*argv, "encap") == 0) {
	288	NEXT_ARG();
	289	if (strcmp(*argv, "fou") == 0)
	290	encaptype = TUNNEL_ENCAP_FOU;
	291	else if (strcmp(*argv, "gue") == 0)
	292	encaptype = TUNNEL_ENCAP_GUE;
	293	else if (strcmp(*argv, "none") == 0)
	294	encaptype = TUNNEL_ENCAP_NONE;
	295	else
	296	invarg("Invalid encap type.", *argv);
	297	} else if (strcmp(*argv, "encap-sport") == 0) {
	298	NEXT_ARG();
	299	if (strcmp(*argv, "auto") == 0)
	300	encapsport = 0;
	301	else if (get_u16(&encapsport, *argv, 0))
	302	invarg("Invalid source port.", *argv);
	303	} else if (strcmp(*argv, "encap-dport") == 0) {
	304	NEXT_ARG();
	305	if (get_u16(&encapdport, *argv, 0))
	306	invarg("Invalid destination port.", *argv);
	307	} else if (strcmp(*argv, "encap-csum") == 0) {
	308	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	309	} else if (strcmp(*argv, "noencap-csum") == 0) {
	310	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	311	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	312	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	313	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	314	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
	315	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	316	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	317	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	318	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
ad4b1425 CG	319	} else if (strcmp(*argv, "fwmark") == 0) {
	320	NEXT_ARG();
	321	if (strcmp(*argv, "inherit") == 0) {
	322	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
	323	fwmark = 0;
	324	} else {
	325	if (get_u32(&fwmark, *argv, 0))
	326	invarg("invalid fwmark\n", *argv);
	327	flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
	328	}
a11b7b71 ND	329	} else if (strcmp(*argv, "encaplimit") == 0) {
	330	NEXT_ARG();
	331	if (strcmp(*argv, "none") == 0) {
	332	flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
	333	} else {
	334	__u8 uval;
	335
56708ae7	336	if (get_u8(&uval, *argv, 0))
a11b7b71 ND	337	invarg("invalid ELIM", *argv);
	338	encap_limit = uval;
	339	flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
	340	}
8595cc40 WT	341	} else if (strcmp(*argv, "erspan") == 0) {
	342	NEXT_ARG();
	343	if (get_u32(&erspan_idx, *argv, 0))
	344	invarg("invalid erspan index\n", *argv);
	345	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	346	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
af89576d	347	} else
	348	usage();
	349	argc--; argv++;
	350	}
	351
	352	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	353	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	354	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	355	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	356	addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr));
	357	addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr));
	358	if (link)
	359	addattr32(n, 1024, IFLA_GRE_LINK, link);
	360	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	361	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	362	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
35893864	363	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
ad4b1425	364	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
8595cc40 WT	365	if (erspan_idx != 0)
8595cc40 WT	366	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
af89576d	367
0b2fbb73 TH	368	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	369	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	370	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	371	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	372
af89576d	373	return 0;
	374	}
	375
	376	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	377	{
af89576d	378	char s2[64];
	379	const char *local = "any";
	380	const char *remote = "any";
56f5daac SH	381	unsigned int iflags = 0;
	382	unsigned int oflags = 0;
	383	unsigned int flags = 0;
090524f8	384	__u32 flowinfo = 0;
af89576d	385	struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;
375560c4	386	__u8 ttl = 0;
af89576d	387
	388	if (!tb)
	389	return;
	390
	391	if (tb[IFLA_GRE_FLAGS])
	392	flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);
	393
	394	if (tb[IFLA_GRE_FLOWINFO])
35893864	395	flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);
af89576d	396
	397	if (tb[IFLA_GRE_REMOTE]) {
	398	struct in6_addr addr;
56f5daac	399
af89576d	400	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_REMOTE]), sizeof(addr));
	401
	402	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	403	remote = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	404	}
af89576d	405
6856fb65	406	print_string(PRINT_ANY, "remote", "remote %s ", remote);
af89576d	407
	408	if (tb[IFLA_GRE_LOCAL]) {
	409	struct in6_addr addr;
56f5daac	410
af89576d	411	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_LOCAL]), sizeof(addr));
	412
	413	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	414	local = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	415	}
af89576d	416
6856fb65	417	print_string(PRINT_ANY, "local", "local %s ", local);
af89576d	418
45d3a6ef	419	if (tb[IFLA_GRE_LINK]) {
56f5daac	420	unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
af89576d	421
45d3a6ef SP	422	if (link) {
	423	print_string(PRINT_ANY, "link", "dev %s ",
	424	ll_index_to_name(link));
	425	}
af89576d	426	}
af89576d	427
375560c4 SP	428	if (tb[IFLA_GRE_TTL])
	429	ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	430	if (is_json_context() \|\| ttl)
	431	print_uint(PRINT_ANY, "ttl", "hoplimit %u ", ttl);
	432	else
	433	print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit");
af89576d	434
e3945d92	435	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) {
6856fb65 JF	436	print_bool(PRINT_ANY,
	437	"ip6_tnl_f_ign_encap_limit",
	438	"encaplimit none ",
	439	true);
e3945d92 SP	440	} else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
e3945d92 SP	441	__u8 val = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);
af89576d	442
e3945d92	443	print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
af89576d	444	}
af89576d	445
2e706e12 SH	446	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
	447	print_bool(PRINT_ANY,
	448	"ip6_tnl_f_use_orig_tclass",
	449	"tclass inherit ",
	450	true);
090524f8 SP	451	} else if (tb[IFLA_GRE_FLOWINFO]) {
090524f8 SP	452	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
2e706e12	453
090524f8 SP	454	snprintf(s2, sizeof(s2), "0x%02x", val);
090524f8 SP	455	print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
2e706e12	456	}
af89576d	457
763cf495 SP	458	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
	459	print_bool(PRINT_ANY,
	460	"ip6_tnl_f_use_orig_flowlabel",
	461	"flowlabel inherit ",
	462	true);
	463	} else if (tb[IFLA_GRE_FLOWINFO]) {
	464	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);
	465
	466	snprintf(s2, sizeof(s2), "0x%05x", val);
	467	print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
	468	}
	469
af89576d	470	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
6856fb65 JF	471	print_bool(PRINT_ANY,
	472	"ip6_tnl_f_rcv_dscp_copy",
	473	"dscp inherit ",
	474	true);
af89576d	475
	476	if (tb[IFLA_GRE_IFLAGS])
	477	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
	478
	479	if (tb[IFLA_GRE_OFLAGS])
	480	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
	481
	482	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
	483	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
6856fb65	484	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
af89576d	485	}
	486
	487	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
	488	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
6856fb65	489	print_string(PRINT_ANY, "okey", "okey %s ", s2);
af89576d	490	}
	491
	492	if (iflags & GRE_SEQ)
6856fb65	493	print_bool(PRINT_ANY, "iseq", "iseq ", true);
af89576d	494	if (oflags & GRE_SEQ)
6856fb65	495	print_bool(PRINT_ANY, "oseq", "oseq ", true);
af89576d	496	if (iflags & GRE_CSUM)
6856fb65	497	print_bool(PRINT_ANY, "icsum", "icsum ", true);
af89576d	498	if (oflags & GRE_CSUM)
6856fb65	499	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
0b2fbb73	500
e97ad3d2	501	if (flags & IP6_TNL_F_USE_ORIG_FWMARK) {
6856fb65 JF	502	print_bool(PRINT_ANY,
	503	"ip6_tnl_f_use_orig_fwmark",
	504	"fwmark inherit ",
	505	true);
e97ad3d2	506	} else if (tb[IFLA_GRE_FWMARK]) {
6856fb65 JF	507	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	508
	509	if (fwmark) {
e97ad3d2 SP	510	print_0xhex(PRINT_ANY,
e97ad3d2 SP	511	"fwmark", "fwmark 0x%x ", fwmark);
6856fb65 JF	512	}
6856fb65 JF	513	}
ad4b1425	514
8595cc40 WT	515	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
8595cc40 WT	516	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
2a8d0f6e SP	517
	518	print_uint(PRINT_ANY,
	519	"erspan_index", "erspan_index %u ", erspan_idx);
8595cc40 WT	520	}
8595cc40 WT	521
bad76e6b SP	522	tnl_print_encap(tb,
	523	IFLA_GRE_ENCAP_TYPE,
	524	IFLA_GRE_ENCAP_FLAGS,
	525	IFLA_GRE_ENCAP_SPORT,
	526	IFLA_GRE_ENCAP_DPORT);
af89576d	527	}
af89576d	528
561e650e	529	static void gre_print_help(struct link_util lu, int argc, char *argv,
	530	FILE *f)
	531	{
	532	print_usage(f);
	533	}
	534
af89576d	535	struct link_util ip6gre_link_util = {
	536	.id = "ip6gre",
	537	.maxattr = IFLA_GRE_MAX,
	538	.parse_opt = gre_parse_opt,
	539	.print_opt = gre_print_opt,
561e650e	540	.print_help = gre_print_help,
af89576d	541	};
	542
	543	struct link_util ip6gretap_link_util = {
	544	.id = "ip6gretap",
	545	.maxattr = IFLA_GRE_MAX,
	546	.parse_opt = gre_parse_opt,
	547	.print_opt = gre_print_opt,
561e650e	548	.print_help = gre_print_help,
af89576d	549	};
8595cc40 WT	550
	551	struct link_util ip6erspan_link_util = {
	552	.id = "ip6erspan",
	553	.maxattr = IFLA_GRE_MAX,
	554	.parse_opt = gre_parse_opt,
	555	.print_opt = gre_print_opt,
	556	.print_help = gre_print_help,
	557	};