[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: ip link { add | set | change | replace | del } NAME\n");
	fprintf(f, "          type { gre | gretap } [ remote ADDR ] [ local ADDR ]\n");
	fprintf(f, "          [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
	fprintf(f, "          [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
	fprintf(f, "          [ noencap ] [ encap { fou | gue | none } ]\n");
	fprintf(f, "          [ encap-sport PORT ] [ encap-dport PORT ]\n");
	fprintf(f, "          [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
	fprintf(f, "\n");
	fprintf(f, "Where: NAME := STRING\n");
	fprintf(f, "       ADDR := { IP_ADDRESS | any }\n");
	fprintf(f, "       TOS  := { NUMBER | inherit }\n");
	fprintf(f, "       TTL  := { 1..255 | inherit }\n");
	fprintf(f, "       KEY  := { DOTTED_QUAD | NUMBER }\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 {
		struct nlmsghdr n;
		struct ifinfomsg i;
		char buf[16384];
	} req;
	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
	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;

	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
		memset(&req, 0, sizeof(req));

		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
		req.n.nlmsg_flags = NLM_F_REQUEST;
		req.n.nlmsg_type = RTM_GETLINK;
		req.i.ifi_family = preferred_family;
		req.i.ifi_index = ifi->ifi_index;

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

		len = req.n.nlmsg_len;
		len -= NLMSG_LENGTH(sizeof(*ifi));
		if (len < 0)
			goto get_failed;

		parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), 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_u8(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;
	}

	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();
			if (strcmp(*argv, "any"))
				daddr = get_addr32(*argv);
		} else if (!matches(*argv, "local")) {
			NEXT_ARG();
			if (strcmp(*argv, "any"))
				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 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
			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;
	}

	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);

	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 (metadata)
		addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);

	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;

	if (!tb)
		return;

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

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

	fprintf(f, "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);
	}

	fprintf(f, "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)
			fprintf(f, "dev %s ", n);
		else
			fprintf(f, "dev %u ", link);
	}

	if (tb[IFLA_GRE_TTL] && rta_getattr_u8(tb[IFLA_GRE_TTL]))
		fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_GRE_TTL]));
	else
		fprintf(f, "ttl inherit ");

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

		fputs("tos ", f);
		if (tos == 1)
			fputs("inherit ", f);
		else
			fprintf(f, "0x%x ", tos);
	}

	if (tb[IFLA_GRE_PMTUDISC] &&
	    !rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
		fputs("nopmtudisc ", f);

	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));
		fprintf(f, "ikey %s ", s2);
	}

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

	if (iflags & GRE_SEQ)
		fputs("iseq ", f);
	if (oflags & GRE_SEQ)
		fputs("oseq ", f);
	if (iflags & GRE_CSUM)
		fputs("icsum ", f);
	if (oflags & GRE_CSUM)
		fputs("ocsum ", f);

	if (tb[IFLA_GRE_COLLECT_METADATA])
		fputs("external ", f);

	if (tb[IFLA_GRE_ENCAP_TYPE] &&
	    *(__u16 *)RTA_DATA(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]);

		fputs("encap ", f);
		switch (type) {
		case TUNNEL_ENCAP_FOU:
			fputs("fou ", f);
			break;
		case TUNNEL_ENCAP_GUE:
			fputs("gue ", f);
			break;
		default:
			fputs("unknown ", f);
			break;
		}

		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,
};
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)
	27	{
	28	fprintf(f, "Usage: ip link { add \| set \| change \| replace \| del } NAME\n");
	29	fprintf(f, " type { gre \| gretap } [ remote ADDR ] [ local ADDR ]\n");
	30	fprintf(f, " [ [i\|o]seq ] [ [i\|o]key KEY ] [ [i\|o]csum ]\n");
	31	fprintf(f, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
80c24b09 TH	32	fprintf(f, " [ noencap ] [ encap { fou \| gue \| none } ]\n");
80c24b09 TH	33	fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n");
858dbb20	34	fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
561e650e	35	fprintf(f, "\n");
	36	fprintf(f, "Where: NAME := STRING\n");
	37	fprintf(f, " ADDR := { IP_ADDRESS \| any }\n");
	38	fprintf(f, " TOS := { NUMBER \| inherit }\n");
	39	fprintf(f, " TTL := { 1..255 \| inherit }\n");
	40	fprintf(f, " KEY := { DOTTED_QUAD \| NUMBER }\n");
	41	}
	42
237d9e82 HX	43	static void usage(void) __attribute__((noreturn));
	44	static void usage(void)
	45	{
561e650e	46	print_usage(stderr);
237d9e82 HX	47	exit(-1);
	48	}
	49
	50	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	51	struct nlmsghdr *n)
	52	{
72c771b2 HX	53	struct {
	54	struct nlmsghdr n;
	55	struct ifinfomsg i;
bde5baa5	56	char buf[16384];
72c771b2 HX	57	} req;
	58	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
	59	struct rtattr *tb[IFLA_MAX + 1];
	60	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	61	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
237d9e82 HX	62	__u16 iflags = 0;
237d9e82 HX	63	__u16 oflags = 0;
56f5daac SH	64	unsigned int ikey = 0;
	65	unsigned int okey = 0;
	66	unsigned int saddr = 0;
	67	unsigned int daddr = 0;
	68	unsigned int link = 0;
72c771b2 HX	69	__u8 pmtudisc = 1;
	70	__u8 ttl = 0;
	71	__u8 tos = 0;
	72	int len;
80c24b09 TH	73	__u16 encaptype = 0;
	74	__u16 encapflags = 0;
	75	__u16 encapsport = 0;
	76	__u16 encapdport = 0;
926b39e1	77	__u8 metadata = 0;
72c771b2 HX	78
	79	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
	80	memset(&req, 0, sizeof(req));
	81
	82	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
	83	req.n.nlmsg_flags = NLM_F_REQUEST;
	84	req.n.nlmsg_type = RTM_GETLINK;
	85	req.i.ifi_family = preferred_family;
	86	req.i.ifi_index = ifi->ifi_index;
	87
c079e121	88	if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
72c771b2 HX	89	get_failed:
	90	fprintf(stderr,
	91	"Failed to get existing tunnel info.\n");
	92	return -1;
	93	}
	94
	95	len = req.n.nlmsg_len;
	96	len -= NLMSG_LENGTH(sizeof(*ifi));
	97	if (len < 0)
	98	goto get_failed;
	99
	100	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len);
	101
	102	if (!tb[IFLA_LINKINFO])
	103	goto get_failed;
	104
	105	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	106
	107	if (!linkinfo[IFLA_INFO_DATA])
	108	goto get_failed;
	109
	110	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	111	linkinfo[IFLA_INFO_DATA]);
	112
	113	if (greinfo[IFLA_GRE_IKEY])
ff24746c	114	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
72c771b2 HX	115
72c771b2 HX	116	if (greinfo[IFLA_GRE_OKEY])
ff24746c	117	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
72c771b2 HX	118
72c771b2 HX	119	if (greinfo[IFLA_GRE_IFLAGS])
ff24746c	120	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
72c771b2 HX	121
72c771b2 HX	122	if (greinfo[IFLA_GRE_OFLAGS])
ff24746c	123	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
72c771b2 HX	124
72c771b2 HX	125	if (greinfo[IFLA_GRE_LOCAL])
ff24746c	126	saddr = rta_getattr_u32(greinfo[IFLA_GRE_LOCAL]);
72c771b2 HX	127
72c771b2 HX	128	if (greinfo[IFLA_GRE_REMOTE])
ff24746c	129	daddr = rta_getattr_u32(greinfo[IFLA_GRE_REMOTE]);
72c771b2 HX	130
72c771b2 HX	131	if (greinfo[IFLA_GRE_PMTUDISC])
ff24746c	132	pmtudisc = rta_getattr_u8(
72c771b2 HX	133	greinfo[IFLA_GRE_PMTUDISC]);
	134
	135	if (greinfo[IFLA_GRE_TTL])
ff24746c	136	ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
72c771b2 HX	137
72c771b2 HX	138	if (greinfo[IFLA_GRE_TOS])
ff24746c	139	tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]);
72c771b2 HX	140
72c771b2 HX	141	if (greinfo[IFLA_GRE_LINK])
ff24746c	142	link = rta_getattr_u8(greinfo[IFLA_GRE_LINK]);
80c24b09 TH	143
	144	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	145	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	146	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	147	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	148	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	149	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	150	if (greinfo[IFLA_GRE_ENCAP_DPORT])
	151	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
926b39e1 PA	152
	153	if (greinfo[IFLA_GRE_COLLECT_METADATA])
	154	metadata = 1;
72c771b2	155	}
237d9e82 HX	156
	157	while (argc > 0) {
	158	if (!matches(*argv, "key")) {
56f5daac	159	unsigned int uval;
237d9e82 HX	160
	161	NEXT_ARG();
	162	iflags \|= GRE_KEY;
	163	oflags \|= GRE_KEY;
	164	if (strchr(*argv, '.'))
	165	uval = get_addr32(*argv);
	166	else {
	167	if (get_unsigned(&uval, *argv, 0) < 0) {
	168	fprintf(stderr,
14645ec2	169	"Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
237d9e82 HX	170	exit(-1);
	171	}
	172	uval = htonl(uval);
	173	}
	174
	175	ikey = okey = uval;
	176	} else if (!matches(*argv, "ikey")) {
56f5daac	177	unsigned int uval;
237d9e82 HX	178
	179	NEXT_ARG();
	180	iflags \|= GRE_KEY;
	181	if (strchr(*argv, '.'))
	182	uval = get_addr32(*argv);
	183	else {
56f5daac	184	if (get_unsigned(&uval, *argv, 0) < 0) {
14645ec2	185	fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
237d9e82 HX	186	exit(-1);
	187	}
	188	uval = htonl(uval);
	189	}
	190	ikey = uval;
	191	} else if (!matches(*argv, "okey")) {
56f5daac	192	unsigned int uval;
237d9e82 HX	193
	194	NEXT_ARG();
	195	oflags \|= GRE_KEY;
	196	if (strchr(*argv, '.'))
	197	uval = get_addr32(*argv);
	198	else {
56f5daac	199	if (get_unsigned(&uval, *argv, 0) < 0) {
14645ec2	200	fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
237d9e82 HX	201	exit(-1);
	202	}
	203	uval = htonl(uval);
	204	}
	205	okey = uval;
	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, "nopmtudisc")) {
72c771b2	221	pmtudisc = 0;
237d9e82	222	} else if (!matches(*argv, "pmtudisc")) {
72c771b2	223	pmtudisc = 1;
237d9e82 HX	224	} else if (!matches(*argv, "remote")) {
	225	NEXT_ARG();
	226	if (strcmp(*argv, "any"))
	227	daddr = get_addr32(*argv);
	228	} else if (!matches(*argv, "local")) {
	229	NEXT_ARG();
	230	if (strcmp(*argv, "any"))
	231	saddr = get_addr32(*argv);
	232	} else if (!matches(*argv, "dev")) {
237d9e82	233	NEXT_ARG();
ea71beac	234	link = if_nametoindex(*argv);
0cb6bb51 CW	235	if (link == 0) {
	236	fprintf(stderr, "Cannot find device \"%s\"\n",
	237	*argv);
237d9e82	238	exit(-1);
0cb6bb51	239	}
237d9e82 HX	240	} else if (!matches(*argv, "ttl") \|\|
237d9e82 HX	241	!matches(*argv, "hoplimit")) {
56f5daac	242	unsigned int uval;
237d9e82 HX	243
	244	NEXT_ARG();
	245	if (strcmp(*argv, "inherit") != 0) {
	246	if (get_unsigned(&uval, *argv, 0))
	247	invarg("invalid TTL\n", *argv);
	248	if (uval > 255)
	249	invarg("TTL must be <= 255\n", *argv);
	250	ttl = uval;
237d9e82 HX	251	}
	252	} else if (!matches(*argv, "tos") \|\|
	253	!matches(*argv, "tclass") \|\|
	254	!matches(*argv, "dsfield")) {
	255	__u32 uval;
237d9e82 HX	256
	257	NEXT_ARG();
	258	if (strcmp(*argv, "inherit") != 0) {
	259	if (rtnl_dsfield_a2n(&uval, *argv))
	260	invarg("bad TOS value", *argv);
	261	tos = uval;
	262	} else
	263	tos = 1;
80c24b09 TH	264	} else if (strcmp(*argv, "noencap") == 0) {
	265	encaptype = TUNNEL_ENCAP_NONE;
	266	} else if (strcmp(*argv, "encap") == 0) {
	267	NEXT_ARG();
	268	if (strcmp(*argv, "fou") == 0)
	269	encaptype = TUNNEL_ENCAP_FOU;
	270	else if (strcmp(*argv, "gue") == 0)
	271	encaptype = TUNNEL_ENCAP_GUE;
	272	else if (strcmp(*argv, "none") == 0)
	273	encaptype = TUNNEL_ENCAP_NONE;
	274	else
	275	invarg("Invalid encap type.", *argv);
	276	} else if (strcmp(*argv, "encap-sport") == 0) {
	277	NEXT_ARG();
	278	if (strcmp(*argv, "auto") == 0)
	279	encapsport = 0;
	280	else if (get_u16(&encapsport, *argv, 0))
	281	invarg("Invalid source port.", *argv);
	282	} else if (strcmp(*argv, "encap-dport") == 0) {
	283	NEXT_ARG();
	284	if (get_u16(&encapdport, *argv, 0))
	285	invarg("Invalid destination port.", *argv);
	286	} else if (strcmp(*argv, "encap-csum") == 0) {
	287	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	288	} else if (strcmp(*argv, "noencap-csum") == 0) {
	289	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	290	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	291	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	292	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	293	encapflags \|= ~TUNNEL_ENCAP_FLAG_CSUM6;
858dbb20 TH	294	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	295	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	296	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	297	encapflags \|= ~TUNNEL_ENCAP_FLAG_REMCSUM;
926b39e1 PA	298	} else if (strcmp(*argv, "external") == 0) {
926b39e1 PA	299	metadata = 1;
0612519e	300	} else
237d9e82 HX	301	usage();
	302	argc--; argv++;
	303	}
	304
	305	if (!ikey && IN_MULTICAST(ntohl(daddr))) {
	306	ikey = daddr;
	307	iflags \|= GRE_KEY;
	308	}
	309	if (!okey && IN_MULTICAST(ntohl(daddr))) {
	310	okey = daddr;
	311	oflags \|= GRE_KEY;
	312	}
	313	if (IN_MULTICAST(ntohl(daddr)) && !saddr) {
14645ec2	314	fprintf(stderr, "A broadcast tunnel requires a source address.\n");
237d9e82 HX	315	return -1;
	316	}
	317
	318	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	319	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	320	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	321	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	322	addattr_l(n, 1024, IFLA_GRE_LOCAL, &saddr, 4);
	323	addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4);
72c771b2 HX	324	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
	325	if (link)
	326	addattr32(n, 1024, IFLA_GRE_LINK, link);
	327	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
	328	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
237d9e82	329
80c24b09 TH	330	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	331	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	332	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	333	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
926b39e1 PA	334	if (metadata)
926b39e1 PA	335	addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
80c24b09	336
237d9e82 HX	337	return 0;
	338	}
	339
	340	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	341	{
237d9e82 HX	342	char s2[64];
	343	const char *local = "any";
	344	const char *remote = "any";
56f5daac SH	345	unsigned int iflags = 0;
56f5daac SH	346	unsigned int oflags = 0;
237d9e82 HX	347
	348	if (!tb)
	349	return;
	350
	351	if (tb[IFLA_GRE_REMOTE]) {
56f5daac	352	unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_REMOTE]);
237d9e82 HX	353
237d9e82 HX	354	if (addr)
a418e451	355	remote = format_host(AF_INET, 4, &addr);
237d9e82 HX	356	}
	357
	358	fprintf(f, "remote %s ", remote);
	359
	360	if (tb[IFLA_GRE_LOCAL]) {
56f5daac	361	unsigned int addr = rta_getattr_u32(tb[IFLA_GRE_LOCAL]);
237d9e82 HX	362
237d9e82 HX	363	if (addr)
a418e451	364	local = format_host(AF_INET, 4, &addr);
237d9e82 HX	365	}
	366
	367	fprintf(f, "local %s ", local);
	368
ff24746c	369	if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
56f5daac	370	unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
ea71beac	371	const char *n = if_indextoname(link, s2);
237d9e82 HX	372
	373	if (n)
	374	fprintf(f, "dev %s ", n);
	375	else
	376	fprintf(f, "dev %u ", link);
	377	}
	378
ff24746c SH	379	if (tb[IFLA_GRE_TTL] && rta_getattr_u8(tb[IFLA_GRE_TTL]))
ff24746c SH	380	fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_GRE_TTL]));
237d9e82 HX	381	else
	382	fprintf(f, "ttl inherit ");
	383
ff24746c SH	384	if (tb[IFLA_GRE_TOS] && rta_getattr_u8(tb[IFLA_GRE_TOS])) {
ff24746c SH	385	int tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);
237d9e82 HX	386
	387	fputs("tos ", f);
	388	if (tos == 1)
	389	fputs("inherit ", f);
	390	else
	391	fprintf(f, "0x%x ", tos);
	392	}
	393
	394	if (tb[IFLA_GRE_PMTUDISC] &&
ff24746c	395	!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
237d9e82 HX	396	fputs("nopmtudisc ", f);
	397
	398	if (tb[IFLA_GRE_IFLAGS])
ff24746c	399	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
237d9e82 HX	400
237d9e82 HX	401	if (tb[IFLA_GRE_OFLAGS])
ff24746c	402	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
237d9e82	403
71816553	404	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
237d9e82 HX	405	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
	406	fprintf(f, "ikey %s ", s2);
	407	}
	408
71816553	409	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
237d9e82	410	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
71816553	411	fprintf(f, "okey %s ", s2);
237d9e82 HX	412	}
	413
	414	if (iflags & GRE_SEQ)
	415	fputs("iseq ", f);
	416	if (oflags & GRE_SEQ)
	417	fputs("oseq ", f);
	418	if (iflags & GRE_CSUM)
	419	fputs("icsum ", f);
	420	if (oflags & GRE_CSUM)
	421	fputs("ocsum ", f);
80c24b09	422
926b39e1 PA	423	if (tb[IFLA_GRE_COLLECT_METADATA])
	424	fputs("external ", f);
	425
80c24b09 TH	426	if (tb[IFLA_GRE_ENCAP_TYPE] &&
	427	(__u16 )RTA_DATA(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
	428	__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
	429	__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
	430	__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
	431	__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);
	432
	433	fputs("encap ", f);
	434	switch (type) {
	435	case TUNNEL_ENCAP_FOU:
	436	fputs("fou ", f);
	437	break;
	438	case TUNNEL_ENCAP_GUE:
	439	fputs("gue ", f);
	440	break;
	441	default:
	442	fputs("unknown ", f);
	443	break;
	444	}
	445
	446	if (sport == 0)
	447	fputs("encap-sport auto ", f);
	448	else
	449	fprintf(f, "encap-sport %u", ntohs(sport));
	450
	451	fprintf(f, "encap-dport %u ", ntohs(dport));
	452
	453	if (flags & TUNNEL_ENCAP_FLAG_CSUM)
	454	fputs("encap-csum ", f);
	455	else
	456	fputs("noencap-csum ", f);
	457
	458	if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
	459	fputs("encap-csum6 ", f);
	460	else
	461	fputs("noencap-csum6 ", f);
858dbb20 TH	462
	463	if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
	464	fputs("encap-remcsum ", f);
	465	else
	466	fputs("noencap-remcsum ", f);
80c24b09	467	}
237d9e82 HX	468	}
237d9e82 HX	469
561e650e	470	static void gre_print_help(struct link_util lu, int argc, char *argv,
	471	FILE *f)
	472	{
	473	print_usage(f);
	474	}
	475
237d9e82 HX	476	struct link_util gre_link_util = {
	477	.id = "gre",
	478	.maxattr = IFLA_GRE_MAX,
	479	.parse_opt = gre_parse_opt,
	480	.print_opt = gre_print_opt,
561e650e	481	.print_help = gre_print_help,
237d9e82 HX	482	};
	483
	484	struct link_util gretap_link_util = {
	485	.id = "gretap",
	486	.maxattr = IFLA_GRE_MAX,
	487	.parse_opt = gre_parse_opt,
	488	.print_opt = gre_print_opt,
561e650e	489	.print_help = gre_print_help,
237d9e82	490	};