[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 print_usage(FILE *f)
{
	fprintf(f,
		"Usage: ... { gre | gretap | erspan } [ remote ADDR ]\n"
		"                            [ local ADDR ]\n"
		"                            [ [i|o]seq ]\n"
		"                            [ [i|o]key KEY ]\n"
		"                            [ [i|o]csum ]\n"
		"                            [ ttl TTL ]\n"
		"                            [ tos TOS ]\n"
		"                            [ [no]pmtudisc ]\n"
		"                            [ [no]ignore-df ]\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"
		"                            [ fwmark MARK ]\n"
		"                            [ erspan IDX ]\n"
		"\n"
		"Where: ADDR := { IP_ADDRESS | any }\n"
		"       TOS  := { NUMBER | inherit }\n"
		"       TTL  := { 1..255 | inherit }\n"
		"       KEY  := { DOTTED_QUAD | NUMBER }\n"
		"       MARK := { 0x0..0xffffffff }\n"
	);
}

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 = NULL;
	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;
	unsigned int ikey = 0;
	unsigned int okey = 0;
	unsigned int saddr = 0;
	unsigned int daddr = 0;
	unsigned int link = 0;
	__u8 pmtudisc = 1;
	__u8 ttl = 0;
	__u8 tos = 0;
	int len;
	__u16 encaptype = 0;
	__u16 encapflags = 0;
	__u16 encapsport = 0;
	__u16 encapdport = 0;
	__u8 metadata = 0;
	__u8 ignore_df = 0;
	__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");
			free(answer);
			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])
			saddr = rta_getattr_u32(greinfo[IFLA_GRE_LOCAL]);

		if (greinfo[IFLA_GRE_REMOTE])
			daddr = rta_getattr_u32(greinfo[IFLA_GRE_REMOTE]);

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

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

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

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

		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")) {
			unsigned int uval;

			NEXT_ARG();
			iflags |= GRE_KEY;
			oflags |= GRE_KEY;
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr,
						"Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
					exit(-1);
				}
				uval = htonl(uval);
			}

			ikey = okey = uval;
		} else if (!matches(*argv, "ikey")) {
			unsigned int uval;

			NEXT_ARG();
			iflags |= GRE_KEY;
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
					exit(-1);
				}
				uval = htonl(uval);
			}
			ikey = uval;
		} else if (!matches(*argv, "okey")) {
			unsigned int uval;

			NEXT_ARG();
			oflags |= GRE_KEY;
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
					exit(-1);
				}
				uval = htonl(uval);
			}
			okey = uval;
		} 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, "nopmtudisc")) {
			pmtudisc = 0;
		} else if (!matches(*argv, "pmtudisc")) {
			pmtudisc = 1;
		} else if (!matches(*argv, "remote")) {
			NEXT_ARG();
			daddr = get_addr32(*argv);
		} else if (!matches(*argv, "local")) {
			NEXT_ARG();
			saddr = get_addr32(*argv);
		} else if (!matches(*argv, "dev")) {
			NEXT_ARG();
			link = if_nametoindex(*argv);
			if (link == 0) {
				fprintf(stderr, "Cannot find device \"%s\"\n",
					*argv);
				exit(-1);
			}
		} else if (!matches(*argv, "ttl") ||
			   !matches(*argv, "hoplimit")) {
			unsigned int uval;

			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (get_unsigned(&uval, *argv, 0))
					invarg("invalid TTL\n", *argv);
				if (uval > 255)
					invarg("TTL must be <= 255\n", *argv);
				ttl = uval;
			} 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
			usage();
		argc--; argv++;
	}

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

	if (!metadata) {
		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, &saddr, 4);
		addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4);
		addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
		if (link)
			addattr32(n, 1024, IFLA_GRE_LINK, link);
		addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
		addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
		addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
		if (erspan_idx != 0)
			addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
	} else {
		addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
	}

	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));

	if (ignore_df)
		addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);

	return 0;
}

static void gre_print_direct_opt(FILE *f, struct rtattr *tb[])
{
	char s2[64];
	const char *local = "any";
	const char *remote = "any";
	unsigned int iflags = 0;
	unsigned int oflags = 0;

	if (tb[IFLA_GRE_REMOTE]) {
		unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_REMOTE]);

		if (addr)
			remote = format_host(AF_INET, 4, &addr);
	}

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

	if (tb[IFLA_GRE_LOCAL]) {
		unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_LOCAL]);

		if (addr)
			local = format_host(AF_INET, 4, &addr);
	}

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

	if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
		unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
		const char *n = if_indextoname(link, s2);

		if (n)
			print_string(PRINT_ANY, "link", "dev %s ", n);
		else
			print_uint(PRINT_ANY, "link_index", "dev %u ", link);
	}

	if (tb[IFLA_GRE_TTL]) {
		__u8 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);

		if (ttl)
			print_int(PRINT_ANY, "ttl", "ttl %d ", ttl);
		else
			print_int(PRINT_JSON, "ttl", NULL, ttl);
	} else {
		print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
	}

	if (tb[IFLA_GRE_TOS] && rta_getattr_u8(tb[IFLA_GRE_TOS])) {
		int tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);

		if (is_json_context()) {
			SPRINT_BUF(b1);

			snprintf(b1, sizeof(b1), "0x%x", tos);
			print_string(PRINT_JSON, "tos", NULL, b1);
		} else {
			fputs("tos ", f);
			if (tos == 1)
				fputs("inherit ", f);
			else
				fprintf(f, "0x%x ", tos);
		}
	}

	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_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) {
			snprintf(s2, sizeof(s2), "0x%x", fwmark);

			print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
		}
	}
}

static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	if (!tb)
		return;

	if (!tb[IFLA_GRE_COLLECT_METADATA])
		gre_print_direct_opt(f, tb);
	else
		print_bool(PRINT_ANY, "external", "external ", 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_ERSPAN_INDEX]) {
		__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);

		fprintf(f, "erspan_index %u ", erspan_idx);
	}

	if (tb[IFLA_GRE_ENCAP_TYPE] &&
	    rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
		__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
		__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
		__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
		__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);


		open_json_object("encap");
		print_string(PRINT_FP, NULL, "encap ", NULL);

		switch (type) {
		case TUNNEL_ENCAP_FOU:
			print_string(PRINT_ANY, "type", "%s ", "fou");
			break;
		case TUNNEL_ENCAP_GUE:
			print_string(PRINT_ANY, "type", "%s ", "gue");
			break;
		default:
			print_null(PRINT_ANY, "type", "%s ", "unknown");
			break;
		}

		if (is_json_context()) {
			print_uint(PRINT_JSON,
				   "sport",
				   NULL,
				   sport ? ntohs(sport) : 0);
			print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));

			print_bool(PRINT_JSON,
				   "csum",
				   NULL,
				   flags & TUNNEL_ENCAP_FLAG_CSUM);

			print_bool(PRINT_JSON,
				   "csum6",
				   NULL,
				   flags & TUNNEL_ENCAP_FLAG_CSUM6);

			print_bool(PRINT_JSON,
				   "remcsum",
				   NULL,
				   flags & TUNNEL_ENCAP_FLAG_REMCSUM);

			close_json_object();
		} else {
			if (sport == 0)
				fputs("encap-sport auto ", f);
			else
				fprintf(f, "encap-sport %u", ntohs(sport));

			fprintf(f, "encap-dport %u ", ntohs(dport));

			if (flags & TUNNEL_ENCAP_FLAG_CSUM)
				fputs("encap-csum ", f);
			else
				fputs("noencap-csum ", f);

			if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
				fputs("encap-csum6 ", f);
			else
				fputs("noencap-csum6 ", f);

			if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
				fputs("encap-remcsum ", f);
			else
				fputs("noencap-remcsum ", f);
		}
	}
}

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

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
561e650e	26	static void print_usage(FILE *f)
561e650e	27	{
8b471354	28	fprintf(f,
9a1381d5	29	"Usage: ... { gre \| gretap \| erspan } [ remote ADDR ]\n"
8b471354 PS	30	" [ local ADDR ]\n"
	31	" [ [i\|o]seq ]\n"
	32	" [ [i\|o]key KEY ]\n"
	33	" [ [i\|o]csum ]\n"
	34	" [ ttl TTL ]\n"
	35	" [ tos TOS ]\n"
	36	" [ [no]pmtudisc ]\n"
adbb2965	37	" [ [no]ignore-df ]\n"
8b471354 PS	38	" [ dev PHYS_DEV ]\n"
	39	" [ noencap ]\n"
	40	" [ encap { fou \| gue \| none } ]\n"
	41	" [ encap-sport PORT ]\n"
	42	" [ encap-dport PORT ]\n"
	43	" [ [no]encap-csum ]\n"
	44	" [ [no]encap-csum6 ]\n"
	45	" [ [no]encap-remcsum ]\n"
ad4b1425	46	" [ fwmark MARK ]\n"
9a1381d5	47	" [ erspan IDX ]\n"
8b471354 PS	48	"\n"
	49	"Where: ADDR := { IP_ADDRESS \| any }\n"
	50	" TOS := { NUMBER \| inherit }\n"
	51	" TTL := { 1..255 \| inherit }\n"
	52	" KEY := { DOTTED_QUAD \| NUMBER }\n"
ad4b1425	53	" MARK := { 0x0..0xffffffff }\n"
8b471354	54	);
561e650e	55	}
561e650e	56
237d9e82 HX	57	static void usage(void) __attribute__((noreturn));
	58	static void usage(void)
	59	{
561e650e	60	print_usage(stderr);
237d9e82 HX	61	exit(-1);
	62	}
	63
	64	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	65	struct nlmsghdr *n)
	66	{
d17b136f	67	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
72c771b2 HX	68	struct {
	69	struct nlmsghdr n;
	70	struct ifinfomsg i;
d17b136f PS	71	} req = {
	72	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	73	.n.nlmsg_flags = NLM_F_REQUEST,
	74	.n.nlmsg_type = RTM_GETLINK,
	75	.i.ifi_family = preferred_family,
	76	.i.ifi_index = ifi->ifi_index,
	77	};
86bf43c7	78	struct nlmsghdr *answer = NULL;
72c771b2 HX	79	struct rtattr *tb[IFLA_MAX + 1];
	80	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	81	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
237d9e82 HX	82	__u16 iflags = 0;
237d9e82 HX	83	__u16 oflags = 0;
56f5daac SH	84	unsigned int ikey = 0;
	85	unsigned int okey = 0;
	86	unsigned int saddr = 0;
	87	unsigned int daddr = 0;
	88	unsigned int link = 0;
72c771b2 HX	89	__u8 pmtudisc = 1;
	90	__u8 ttl = 0;
	91	__u8 tos = 0;
	92	int len;
80c24b09 TH	93	__u16 encaptype = 0;
	94	__u16 encapflags = 0;
	95	__u16 encapsport = 0;
	96	__u16 encapdport = 0;
926b39e1	97	__u8 metadata = 0;
adbb2965	98	__u8 ignore_df = 0;
ad4b1425	99	__u32 fwmark = 0;
9a1381d5	100	__u32 erspan_idx = 0;
72c771b2 HX	101
72c771b2 HX	102	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
86bf43c7	103	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
72c771b2 HX	104	get_failed:
	105	fprintf(stderr,
	106	"Failed to get existing tunnel info.\n");
86bf43c7	107	free(answer);
72c771b2 HX	108	return -1;
	109	}
	110
86bf43c7	111	len = answer->nlmsg_len;
72c771b2 HX	112	len -= NLMSG_LENGTH(sizeof(*ifi));
	113	if (len < 0)
	114	goto get_failed;
	115
86bf43c7	116	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
72c771b2 HX	117
	118	if (!tb[IFLA_LINKINFO])
	119	goto get_failed;
	120
	121	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	122
	123	if (!linkinfo[IFLA_INFO_DATA])
	124	goto get_failed;
	125
	126	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	127	linkinfo[IFLA_INFO_DATA]);
	128
	129	if (greinfo[IFLA_GRE_IKEY])
ff24746c	130	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
72c771b2 HX	131
72c771b2 HX	132	if (greinfo[IFLA_GRE_OKEY])
ff24746c	133	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
72c771b2 HX	134
72c771b2 HX	135	if (greinfo[IFLA_GRE_IFLAGS])
ff24746c	136	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
72c771b2 HX	137
72c771b2 HX	138	if (greinfo[IFLA_GRE_OFLAGS])
ff24746c	139	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
72c771b2 HX	140
72c771b2 HX	141	if (greinfo[IFLA_GRE_LOCAL])
ff24746c	142	saddr = rta_getattr_u32(greinfo[IFLA_GRE_LOCAL]);
72c771b2 HX	143
72c771b2 HX	144	if (greinfo[IFLA_GRE_REMOTE])
ff24746c	145	daddr = rta_getattr_u32(greinfo[IFLA_GRE_REMOTE]);
72c771b2 HX	146
72c771b2 HX	147	if (greinfo[IFLA_GRE_PMTUDISC])
ff24746c	148	pmtudisc = rta_getattr_u8(
72c771b2 HX	149	greinfo[IFLA_GRE_PMTUDISC]);
	150
	151	if (greinfo[IFLA_GRE_TTL])
ff24746c	152	ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
72c771b2 HX	153
72c771b2 HX	154	if (greinfo[IFLA_GRE_TOS])
ff24746c	155	tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]);
72c771b2 HX	156
72c771b2 HX	157	if (greinfo[IFLA_GRE_LINK])
a6addd5c	158	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
80c24b09 TH	159
	160	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	161	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	162	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	163	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	164	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	165	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	166	if (greinfo[IFLA_GRE_ENCAP_DPORT])
	167	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
926b39e1 PA	168
	169	if (greinfo[IFLA_GRE_COLLECT_METADATA])
	170	metadata = 1;
ad4b1425	171
adbb2965 PP	172	if (greinfo[IFLA_GRE_IGNORE_DF])
	173	ignore_df =
	174	!!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]);
	175
ad4b1425 CG	176	if (greinfo[IFLA_GRE_FWMARK])
ad4b1425 CG	177	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
9a1381d5 WT	178
	179	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	180	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
86bf43c7 HL	181
86bf43c7 HL	182	free(answer);
72c771b2	183	}
237d9e82 HX	184
	185	while (argc > 0) {
	186	if (!matches(*argv, "key")) {
56f5daac	187	unsigned int uval;
237d9e82 HX	188
	189	NEXT_ARG();
	190	iflags \|= GRE_KEY;
	191	oflags \|= GRE_KEY;
	192	if (strchr(*argv, '.'))
	193	uval = get_addr32(*argv);
	194	else {
	195	if (get_unsigned(&uval, *argv, 0) < 0) {
	196	fprintf(stderr,
14645ec2	197	"Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
237d9e82 HX	198	exit(-1);
	199	}
	200	uval = htonl(uval);
	201	}
	202
	203	ikey = okey = uval;
	204	} else if (!matches(*argv, "ikey")) {
56f5daac	205	unsigned int uval;
237d9e82 HX	206
	207	NEXT_ARG();
	208	iflags \|= GRE_KEY;
	209	if (strchr(*argv, '.'))
	210	uval = get_addr32(*argv);
	211	else {
56f5daac	212	if (get_unsigned(&uval, *argv, 0) < 0) {
14645ec2	213	fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
237d9e82 HX	214	exit(-1);
	215	}
	216	uval = htonl(uval);
	217	}
	218	ikey = uval;
	219	} else if (!matches(*argv, "okey")) {
56f5daac	220	unsigned int uval;
237d9e82 HX	221
	222	NEXT_ARG();
	223	oflags \|= GRE_KEY;
	224	if (strchr(*argv, '.'))
	225	uval = get_addr32(*argv);
	226	else {
56f5daac	227	if (get_unsigned(&uval, *argv, 0) < 0) {
14645ec2	228	fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
237d9e82 HX	229	exit(-1);
	230	}
	231	uval = htonl(uval);
	232	}
	233	okey = uval;
	234	} else if (!matches(*argv, "seq")) {
	235	iflags \|= GRE_SEQ;
	236	oflags \|= GRE_SEQ;
	237	} else if (!matches(*argv, "iseq")) {
	238	iflags \|= GRE_SEQ;
	239	} else if (!matches(*argv, "oseq")) {
	240	oflags \|= GRE_SEQ;
	241	} else if (!matches(*argv, "csum")) {
	242	iflags \|= GRE_CSUM;
	243	oflags \|= GRE_CSUM;
	244	} else if (!matches(*argv, "icsum")) {
	245	iflags \|= GRE_CSUM;
	246	} else if (!matches(*argv, "ocsum")) {
	247	oflags \|= GRE_CSUM;
	248	} else if (!matches(*argv, "nopmtudisc")) {
72c771b2	249	pmtudisc = 0;
237d9e82	250	} else if (!matches(*argv, "pmtudisc")) {
72c771b2	251	pmtudisc = 1;
237d9e82 HX	252	} else if (!matches(*argv, "remote")) {
237d9e82 HX	253	NEXT_ARG();
57daab1e	254	daddr = get_addr32(*argv);
237d9e82 HX	255	} else if (!matches(*argv, "local")) {
237d9e82 HX	256	NEXT_ARG();
57daab1e	257	saddr = get_addr32(*argv);
237d9e82	258	} else if (!matches(*argv, "dev")) {
237d9e82	259	NEXT_ARG();
ea71beac	260	link = if_nametoindex(*argv);
0cb6bb51 CW	261	if (link == 0) {
	262	fprintf(stderr, "Cannot find device \"%s\"\n",
	263	*argv);
237d9e82	264	exit(-1);
0cb6bb51	265	}
237d9e82 HX	266	} else if (!matches(*argv, "ttl") \|\|
237d9e82 HX	267	!matches(*argv, "hoplimit")) {
56f5daac	268	unsigned int uval;
237d9e82 HX	269
	270	NEXT_ARG();
	271	if (strcmp(*argv, "inherit") != 0) {
	272	if (get_unsigned(&uval, *argv, 0))
	273	invarg("invalid TTL\n", *argv);
	274	if (uval > 255)
	275	invarg("TTL must be <= 255\n", *argv);
	276	ttl = uval;
079e6781 RS	277	} else
079e6781 RS	278	ttl = 0;
237d9e82 HX	279	} else if (!matches(*argv, "tos") \|\|
	280	!matches(*argv, "tclass") \|\|
	281	!matches(*argv, "dsfield")) {
	282	__u32 uval;
237d9e82 HX	283
	284	NEXT_ARG();
	285	if (strcmp(*argv, "inherit") != 0) {
	286	if (rtnl_dsfield_a2n(&uval, *argv))
	287	invarg("bad TOS value", *argv);
	288	tos = uval;
	289	} else
	290	tos = 1;
80c24b09 TH	291	} else if (strcmp(*argv, "noencap") == 0) {
	292	encaptype = TUNNEL_ENCAP_NONE;
	293	} else if (strcmp(*argv, "encap") == 0) {
	294	NEXT_ARG();
	295	if (strcmp(*argv, "fou") == 0)
	296	encaptype = TUNNEL_ENCAP_FOU;
	297	else if (strcmp(*argv, "gue") == 0)
	298	encaptype = TUNNEL_ENCAP_GUE;
	299	else if (strcmp(*argv, "none") == 0)
	300	encaptype = TUNNEL_ENCAP_NONE;
	301	else
	302	invarg("Invalid encap type.", *argv);
	303	} else if (strcmp(*argv, "encap-sport") == 0) {
	304	NEXT_ARG();
	305	if (strcmp(*argv, "auto") == 0)
	306	encapsport = 0;
	307	else if (get_u16(&encapsport, *argv, 0))
	308	invarg("Invalid source port.", *argv);
	309	} else if (strcmp(*argv, "encap-dport") == 0) {
	310	NEXT_ARG();
	311	if (get_u16(&encapdport, *argv, 0))
	312	invarg("Invalid destination port.", *argv);
	313	} else if (strcmp(*argv, "encap-csum") == 0) {
	314	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	315	} else if (strcmp(*argv, "noencap-csum") == 0) {
	316	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	317	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	318	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	319	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	320	encapflags \|= ~TUNNEL_ENCAP_FLAG_CSUM6;
858dbb20 TH	321	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	322	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	323	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	324	encapflags \|= ~TUNNEL_ENCAP_FLAG_REMCSUM;
926b39e1 PA	325	} else if (strcmp(*argv, "external") == 0) {
926b39e1 PA	326	metadata = 1;
adbb2965 PP	327	} else if (strcmp(*argv, "ignore-df") == 0) {
	328	ignore_df = 1;
	329	} else if (strcmp(*argv, "noignore-df") == 0) {
	330	/*
	331	*only the lsb is significant, use 2 for presence
	332	*/
	333	ignore_df = 2;
ad4b1425 CG	334	} else if (strcmp(*argv, "fwmark") == 0) {
	335	NEXT_ARG();
	336	if (get_u32(&fwmark, *argv, 0))
	337	invarg("invalid fwmark\n", *argv);
9a1381d5 WT	338	} else if (strcmp(*argv, "erspan") == 0) {
	339	NEXT_ARG();
	340	if (get_u32(&erspan_idx, *argv, 0))
	341	invarg("invalid erspan index\n", *argv);
	342	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	343	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
0612519e	344	} else
237d9e82 HX	345	usage();
	346	argc--; argv++;
	347	}
	348
	349	if (!ikey && IN_MULTICAST(ntohl(daddr))) {
	350	ikey = daddr;
	351	iflags \|= GRE_KEY;
	352	}
	353	if (!okey && IN_MULTICAST(ntohl(daddr))) {
	354	okey = daddr;
	355	oflags \|= GRE_KEY;
	356	}
	357	if (IN_MULTICAST(ntohl(daddr)) && !saddr) {
14645ec2	358	fprintf(stderr, "A broadcast tunnel requires a source address.\n");
237d9e82 HX	359	return -1;
	360	}
	361
df217d5d JB	362	if (!metadata) {
	363	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	364	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	365	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	366	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	367	addattr_l(n, 1024, IFLA_GRE_LOCAL, &saddr, 4);
	368	addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4);
	369	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
	370	if (link)
	371	addattr32(n, 1024, IFLA_GRE_LINK, link);
	372	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
	373	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
ad4b1425	374	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
9a1381d5 WT	375	if (erspan_idx != 0)
9a1381d5 WT	376	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
df217d5d JB	377	} else {
	378	addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
	379	}
237d9e82	380
80c24b09 TH	381	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	382	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	383	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	384	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	385
adbb2965 PP	386	if (ignore_df)
	387	addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);
	388
237d9e82 HX	389	return 0;
	390	}
	391
7c337e2c	392	static void gre_print_direct_opt(FILE f, struct rtattr tb[])
237d9e82	393	{
237d9e82 HX	394	char s2[64];
	395	const char *local = "any";
	396	const char *remote = "any";
56f5daac SH	397	unsigned int iflags = 0;
56f5daac SH	398	unsigned int oflags = 0;
237d9e82	399
237d9e82	400	if (tb[IFLA_GRE_REMOTE]) {
56f5daac	401	unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_REMOTE]);
237d9e82 HX	402
237d9e82 HX	403	if (addr)
a418e451	404	remote = format_host(AF_INET, 4, &addr);
237d9e82 HX	405	}
237d9e82 HX	406
e2d45883	407	print_string(PRINT_ANY, "remote", "remote %s ", remote);
237d9e82 HX	408
237d9e82 HX	409	if (tb[IFLA_GRE_LOCAL]) {
56f5daac	410	unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_LOCAL]);
237d9e82 HX	411
237d9e82 HX	412	if (addr)
a418e451	413	local = format_host(AF_INET, 4, &addr);
237d9e82 HX	414	}
237d9e82 HX	415
e2d45883	416	print_string(PRINT_ANY, "local", "local %s ", local);
237d9e82	417
ff24746c	418	if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
56f5daac	419	unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
ea71beac	420	const char *n = if_indextoname(link, s2);
237d9e82 HX	421
237d9e82 HX	422	if (n)
e2d45883	423	print_string(PRINT_ANY, "link", "dev %s ", n);
237d9e82	424	else
e2d45883	425	print_uint(PRINT_ANY, "link_index", "dev %u ", link);
237d9e82 HX	426	}
237d9e82 HX	427
e2d45883 JF	428	if (tb[IFLA_GRE_TTL]) {
	429	__u8 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	430
	431	if (ttl)
	432	print_int(PRINT_ANY, "ttl", "ttl %d ", ttl);
	433	else
	434	print_int(PRINT_JSON, "ttl", NULL, ttl);
	435	} else {
	436	print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
	437	}
237d9e82	438
ff24746c SH	439	if (tb[IFLA_GRE_TOS] && rta_getattr_u8(tb[IFLA_GRE_TOS])) {
ff24746c SH	440	int tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);
237d9e82	441
e2d45883 JF	442	if (is_json_context()) {
	443	SPRINT_BUF(b1);
	444
	445	snprintf(b1, sizeof(b1), "0x%x", tos);
	446	print_string(PRINT_JSON, "tos", NULL, b1);
	447	} else {
	448	fputs("tos ", f);
	449	if (tos == 1)
	450	fputs("inherit ", f);
	451	else
	452	fprintf(f, "0x%x ", tos);
	453	}
237d9e82 HX	454	}
237d9e82 HX	455
e2d45883 JF	456	if (tb[IFLA_GRE_PMTUDISC]) {
	457	if (!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
	458	print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
	459	else
	460	print_bool(PRINT_JSON, "pmtudisc", NULL, true);
	461	}
237d9e82 HX	462
237d9e82 HX	463	if (tb[IFLA_GRE_IFLAGS])
ff24746c	464	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
237d9e82 HX	465
237d9e82 HX	466	if (tb[IFLA_GRE_OFLAGS])
ff24746c	467	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
237d9e82	468
71816553	469	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
237d9e82	470	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
e2d45883	471	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
237d9e82 HX	472	}
237d9e82 HX	473
71816553	474	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
237d9e82	475	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
e2d45883	476	print_string(PRINT_ANY, "okey", "okey %s ", s2);
237d9e82 HX	477	}
	478
	479	if (iflags & GRE_SEQ)
e2d45883	480	print_bool(PRINT_ANY, "iseq", "iseq ", true);
237d9e82	481	if (oflags & GRE_SEQ)
e2d45883	482	print_bool(PRINT_ANY, "oseq", "oseq ", true);
237d9e82	483	if (iflags & GRE_CSUM)
e2d45883	484	print_bool(PRINT_ANY, "icsum", "icsum ", true);
237d9e82	485	if (oflags & GRE_CSUM)
e2d45883 JF	486	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
	487
	488	if (tb[IFLA_GRE_FWMARK]) {
	489	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	490
	491	if (fwmark) {
	492	snprintf(s2, sizeof(s2), "0x%x", fwmark);
ad4b1425	493
e2d45883 JF	494	print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
e2d45883 JF	495	}
ad4b1425	496	}
7c337e2c	497	}
80c24b09	498
7c337e2c JB	499	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	500	{
	501	if (!tb)
	502	return;
	503
	504	if (!tb[IFLA_GRE_COLLECT_METADATA])
	505	gre_print_direct_opt(f, tb);
	506	else
e2d45883	507	print_bool(PRINT_ANY, "external", "external ", true);
926b39e1	508
adbb2965	509	if (tb[IFLA_GRE_IGNORE_DF] && rta_getattr_u8(tb[IFLA_GRE_IGNORE_DF]))
e2d45883	510	print_bool(PRINT_ANY, "ignore_df", "ignore-df ", true);
adbb2965	511
9a1381d5 WT	512	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
	513	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
	514
	515	fprintf(f, "erspan_index %u ", erspan_idx);
	516	}
	517
80c24b09	518	if (tb[IFLA_GRE_ENCAP_TYPE] &&
0b2fbb73	519	rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
80c24b09 TH	520	__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
	521	__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
	522	__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
	523	__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);
	524
e2d45883 JF	525
	526	open_json_object("encap");
	527	print_string(PRINT_FP, NULL, "encap ", NULL);
	528
80c24b09 TH	529	switch (type) {
80c24b09 TH	530	case TUNNEL_ENCAP_FOU:
e2d45883	531	print_string(PRINT_ANY, "type", "%s ", "fou");
80c24b09 TH	532	break;
80c24b09 TH	533	case TUNNEL_ENCAP_GUE:
e2d45883	534	print_string(PRINT_ANY, "type", "%s ", "gue");
80c24b09 TH	535	break;
80c24b09 TH	536	default:
e2d45883	537	print_null(PRINT_ANY, "type", "%s ", "unknown");
80c24b09 TH	538	break;
	539	}
	540
e2d45883 JF	541	if (is_json_context()) {
	542	print_uint(PRINT_JSON,
	543	"sport",
	544	NULL,
	545	sport ? ntohs(sport) : 0);
	546	print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));
	547
	548	print_bool(PRINT_JSON,
	549	"csum",
	550	NULL,
	551	flags & TUNNEL_ENCAP_FLAG_CSUM);
	552
	553	print_bool(PRINT_JSON,
	554	"csum6",
	555	NULL,
	556	flags & TUNNEL_ENCAP_FLAG_CSUM6);
	557
	558	print_bool(PRINT_JSON,
	559	"remcsum",
	560	NULL,
	561	flags & TUNNEL_ENCAP_FLAG_REMCSUM);
	562
	563	close_json_object();
	564	} else {
	565	if (sport == 0)
	566	fputs("encap-sport auto ", f);
	567	else
	568	fprintf(f, "encap-sport %u", ntohs(sport));
80c24b09	569
e2d45883	570	fprintf(f, "encap-dport %u ", ntohs(dport));
80c24b09	571
e2d45883 JF	572	if (flags & TUNNEL_ENCAP_FLAG_CSUM)
	573	fputs("encap-csum ", f);
	574	else
	575	fputs("noencap-csum ", f);
80c24b09	576
e2d45883 JF	577	if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
	578	fputs("encap-csum6 ", f);
	579	else
	580	fputs("noencap-csum6 ", f);
858dbb20	581
e2d45883 JF	582	if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
	583	fputs("encap-remcsum ", f);
	584	else
	585	fputs("noencap-remcsum ", f);
	586	}
80c24b09	587	}
237d9e82 HX	588	}
237d9e82 HX	589
561e650e	590	static void gre_print_help(struct link_util lu, int argc, char *argv,
e2d45883	591	FILE *f)
561e650e	592	{
	593	print_usage(f);
	594	}
	595
237d9e82 HX	596	struct link_util gre_link_util = {
	597	.id = "gre",
	598	.maxattr = IFLA_GRE_MAX,
	599	.parse_opt = gre_parse_opt,
	600	.print_opt = gre_print_opt,
561e650e	601	.print_help = gre_print_help,
237d9e82 HX	602	};
	603
	604	struct link_util gretap_link_util = {
	605	.id = "gretap",
	606	.maxattr = IFLA_GRE_MAX,
	607	.parse_opt = gre_parse_opt,
	608	.print_opt = gre_print_opt,
561e650e	609	.print_help = gre_print_help,
237d9e82	610	};
9a1381d5 WT	611
	612	struct link_util erspan_link_util = {
	613	.id = "erspan",
	614	.maxattr = IFLA_GRE_MAX,
	615	.parse_opt = gre_parse_opt,
	616	.print_opt = gre_print_opt,
	617	.print_help = gre_print_help,
	618	};