[mirror_iproute2.git] / ip / ip6tunnel.c

/*
 * Copyright (C)2006 USAGI/WIDE Project
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses>.
 */
/*
 * Author:
 *	Masahide NAKAMURA @USAGI
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <linux/ip.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/if_tunnel.h>
#include <linux/ip6_tunnel.h>

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

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

#define DEFAULT_TNL_HOP_LIMIT	(64)

static void usage(void) __attribute__((noreturn));

static void usage(void)
{
	fprintf(stderr, "Usage: ip -f inet6 tunnel { add | change | del | show } [ NAME ]\n");
	fprintf(stderr, "          [ mode { ip6ip6 | ipip6 | ip6gre | vti6 | any } ]\n");
	fprintf(stderr, "          [ remote ADDR local ADDR ] [ dev PHYS_DEV ]\n");
	fprintf(stderr, "          [ encaplimit ELIM ]\n");
	fprintf(stderr, "          [ hoplimit TTL ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n");
	fprintf(stderr, "          [ dscp inherit ]\n");
	fprintf(stderr, "          [ [no]allow-localremote ]\n");
	fprintf(stderr, "          [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
	fprintf(stderr, "\n");
	fprintf(stderr, "Where: NAME      := STRING\n");
	fprintf(stderr, "       ADDR      := IPV6_ADDRESS\n");
	fprintf(stderr, "       ELIM      := { none | 0..255 }(default=%d)\n",
		IPV6_DEFAULT_TNL_ENCAP_LIMIT);
	fprintf(stderr, "       TTL       := 0..255 (default=%d)\n",
		DEFAULT_TNL_HOP_LIMIT);
	fprintf(stderr, "       TCLASS    := { 0x0..0xff | inherit }\n");
	fprintf(stderr, "       FLOWLABEL := { 0x0..0xfffff | inherit }\n");
	fprintf(stderr, "       KEY       := { DOTTED_QUAD | NUMBER }\n");
	exit(-1);
}

static void print_tunnel(const void *t)
{
	const struct ip6_tnl_parm2 *p = t;
	char s1[1024];
	char s2[1024];

	/* Do not use format_host() for local addr,
	 * symbolic name will not be useful.
	 */
	printf("%s: %s/ipv6 remote %s local %s",
	       p->name,
	       tnl_strproto(p->proto),
	       format_host_r(AF_INET6, 16, &p->raddr, s1, sizeof(s1)),
	       rt_addr_n2a_r(AF_INET6, 16, &p->laddr, s2, sizeof(s2)));
	if (p->link) {
		const char *n = ll_index_to_name(p->link);

		if (n)
			printf(" dev %s", n);
	}

	if (p->flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
		printf(" encaplimit none");
	else
		printf(" encaplimit %u", p->encap_limit);

	if (p->hop_limit)
		printf(" hoplimit %u", p->hop_limit);
	else
		printf(" hoplimit inherit");

	if (p->flags & IP6_TNL_F_USE_ORIG_TCLASS)
		printf(" tclass inherit");
	else {
		__u32 val = ntohl(p->flowinfo & IP6_FLOWINFO_TCLASS);

		printf(" tclass 0x%02x", (__u8)(val >> 20));
	}

	if (p->flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
		printf(" flowlabel inherit");
	else
		printf(" flowlabel 0x%05x", ntohl(p->flowinfo & IP6_FLOWINFO_FLOWLABEL));

	printf(" (flowinfo 0x%08x)", ntohl(p->flowinfo));

	if (p->flags & IP6_TNL_F_RCV_DSCP_COPY)
		printf(" dscp inherit");

	if (p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE)
		printf(" allow-localremote");

	if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) &&
	    p->o_key == p->i_key)
		printf(" key %u", ntohl(p->i_key));
	else {
		if (p->i_flags & GRE_KEY)
			printf(" ikey %u", ntohl(p->i_key));
		if (p->o_flags & GRE_KEY)
			printf(" okey %u", ntohl(p->o_key));
	}

	if (p->proto == IPPROTO_GRE) {
		if (p->i_flags & GRE_SEQ)
			printf("%s  Drop packets out of sequence.", _SL_);
		if (p->i_flags & GRE_CSUM)
			printf("%s  Checksum in received packet is required.", _SL_);
		if (p->o_flags & GRE_SEQ)
			printf("%s  Sequence packets on output.", _SL_);
		if (p->o_flags & GRE_CSUM)
			printf("%s  Checksum output packets.", _SL_);
	}
}

static int parse_args(int argc, char **argv, int cmd, struct ip6_tnl_parm2 *p)
{
	int count = 0;
	const char *medium = NULL;

	while (argc > 0) {
		if (strcmp(*argv, "mode") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "ipv6/ipv6") == 0 ||
			    strcmp(*argv, "ip6ip6") == 0)
				p->proto = IPPROTO_IPV6;
			else if (strcmp(*argv, "vti6") == 0) {
				p->proto = IPPROTO_IPV6;
				p->i_flags |= VTI_ISVTI;
			} else if (strcmp(*argv, "ip/ipv6") == 0 ||
				 strcmp(*argv, "ipv4/ipv6") == 0 ||
				 strcmp(*argv, "ipip6") == 0 ||
				 strcmp(*argv, "ip4ip6") == 0)
				p->proto = IPPROTO_IPIP;
			else if (strcmp(*argv, "ip6gre") == 0 ||
				 strcmp(*argv, "gre/ipv6") == 0)
				p->proto = IPPROTO_GRE;
			else if (strcmp(*argv, "any/ipv6") == 0 ||
				 strcmp(*argv, "any") == 0)
				p->proto = 0;
			else {
				fprintf(stderr, "Unknown tunnel mode \"%s\"\n", *argv);
				exit(-1);
			}
		} else if (strcmp(*argv, "remote") == 0) {
			inet_prefix raddr;

			NEXT_ARG();
			get_addr(&raddr, *argv, AF_INET6);
			memcpy(&p->raddr, &raddr.data, sizeof(p->raddr));
		} else if (strcmp(*argv, "local") == 0) {
			inet_prefix laddr;

			NEXT_ARG();
			get_addr(&laddr, *argv, AF_INET6);
			memcpy(&p->laddr, &laddr.data, sizeof(p->laddr));
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			medium = *argv;
		} else if (strcmp(*argv, "encaplimit") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "none") == 0) {
				p->flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
			} else {
				__u8 uval;

				if (get_u8(&uval, *argv, 0) < -1)
					invarg("invalid ELIM", *argv);
				p->encap_limit = uval;
				p->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
			}
		} else if (strcmp(*argv, "hoplimit") == 0 ||
			   strcmp(*argv, "ttl") == 0 ||
			   strcmp(*argv, "hlim") == 0) {
			__u8 uval;

			NEXT_ARG();
			if (get_u8(&uval, *argv, 0))
				invarg("invalid TTL", *argv);
			p->hop_limit = uval;
		} else if (strcmp(*argv, "tclass") == 0 ||
			   strcmp(*argv, "tc") == 0 ||
			   strcmp(*argv, "tos") == 0 ||
			   matches(*argv, "dsfield") == 0) {
			__u8 uval;

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

			NEXT_ARG();
			p->flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
			if (strcmp(*argv, "inherit") == 0)
				p->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);
				p->flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
				p->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
			}
		} else if (strcmp(*argv, "dscp") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0)
				invarg("not inherit", *argv);
			p->flags |= IP6_TNL_F_RCV_DSCP_COPY;
		} else if (strcmp(*argv, "allow-localremote") == 0) {
			p->flags |= IP6_TNL_F_ALLOW_LOCAL_REMOTE;
		} else if (strcmp(*argv, "noallow-localremote") == 0) {
			p->flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE;
		} else if (strcmp(*argv, "key") == 0) {
			NEXT_ARG();
			p->i_flags |= GRE_KEY;
			p->o_flags |= GRE_KEY;
			p->i_key = p->o_key = tnl_parse_key("key", *argv);
		} else if (strcmp(*argv, "ikey") == 0) {
			NEXT_ARG();
			p->i_flags |= GRE_KEY;
			p->i_key = tnl_parse_key("ikey", *argv);
		} else if (strcmp(*argv, "okey") == 0) {
			NEXT_ARG();
			p->o_flags |= GRE_KEY;
			p->o_key = tnl_parse_key("okey", *argv);
		} else if (strcmp(*argv, "seq") == 0) {
			p->i_flags |= GRE_SEQ;
			p->o_flags |= GRE_SEQ;
		} else if (strcmp(*argv, "iseq") == 0) {
			p->i_flags |= GRE_SEQ;
		} else if (strcmp(*argv, "oseq") == 0) {
			p->o_flags |= GRE_SEQ;
		} else if (strcmp(*argv, "csum") == 0) {
			p->i_flags |= GRE_CSUM;
			p->o_flags |= GRE_CSUM;
		} else if (strcmp(*argv, "icsum") == 0) {
			p->i_flags |= GRE_CSUM;
		} else if (strcmp(*argv, "ocsum") == 0) {
			p->o_flags |= GRE_CSUM;
		} else {
			if (strcmp(*argv, "name") == 0) {
				NEXT_ARG();
			} else if (matches(*argv, "help") == 0)
				usage();
			if (p->name[0])
				duparg2("name", *argv);
			if (get_ifname(p->name, *argv))
				invarg("\"name\" not a valid ifname", *argv);
			if (cmd == SIOCCHGTUNNEL && count == 0) {
				struct ip6_tnl_parm2 old_p = {};

				if (tnl_get_ioctl(*argv, &old_p))
					return -1;
				*p = old_p;
			}
		}
		count++;
		argc--; argv++;
	}
	if (medium) {
		p->link = ll_name_to_index(medium);
		if (!p->link)
			return nodev(medium);
	}
	return 0;
}

static void ip6_tnl_parm_init(struct ip6_tnl_parm2 *p, int apply_default)
{
	memset(p, 0, sizeof(*p));
	p->proto = IPPROTO_IPV6;
	if (apply_default) {
		p->hop_limit = DEFAULT_TNL_HOP_LIMIT;
		p->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	}
}

static void ip6_tnl_parm_initialize(const struct tnl_print_nlmsg_info *info)
{
	const struct ifinfomsg *ifi = info->ifi;
	const struct ip6_tnl_parm2 *p1 = info->p1;
	struct ip6_tnl_parm2 *p2 = info->p2;

	ip6_tnl_parm_init(p2, 0);
	if (ifi->ifi_type == ARPHRD_IP6GRE)
		p2->proto = IPPROTO_GRE;
	p2->link = ifi->ifi_index;
	strcpy(p2->name, p1->name);
}

static bool ip6_tnl_parm_match(const struct tnl_print_nlmsg_info *info)
{
	const struct ip6_tnl_parm2 *p1 = info->p1;
	const struct ip6_tnl_parm2 *p2 = info->p2;

	return ((!p1->link || p1->link == p2->link) &&
		(!p1->name[0] || strcmp(p1->name, p2->name) == 0) &&
		(IN6_IS_ADDR_UNSPECIFIED(&p1->laddr) ||
		 IN6_ARE_ADDR_EQUAL(&p1->laddr, &p2->laddr)) &&
		(IN6_IS_ADDR_UNSPECIFIED(&p1->raddr) ||
		 IN6_ARE_ADDR_EQUAL(&p1->raddr, &p2->raddr)) &&
		(!p1->proto || !p2->proto || p1->proto == p2->proto) &&
		(!p1->encap_limit || p1->encap_limit == p2->encap_limit) &&
		(!p1->hop_limit || p1->hop_limit == p2->hop_limit) &&
		(!(p1->flowinfo & IP6_FLOWINFO_TCLASS) ||
		 !((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_TCLASS)) &&
		(!(p1->flowinfo & IP6_FLOWINFO_FLOWLABEL) ||
		 !((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_FLOWLABEL)) &&
		(!p1->flags || (p1->flags & p2->flags)));
}

static int do_show(int argc, char **argv)
{
	struct ip6_tnl_parm2 p, p1;

	ip6_tnl_parm_init(&p, 0);
	p.proto = 0;  /* default to any */

	if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
		return -1;

	if (!p.name[0] || show_stats) {
		struct tnl_print_nlmsg_info info = {
			.p1    = &p,
			.p2    = &p1,
			.init  = ip6_tnl_parm_initialize,
			.match = ip6_tnl_parm_match,
			.print = print_tunnel,
		};

		return do_tunnels_list(&info);
	}

	if (tnl_get_ioctl(p.name, &p))
		return -1;

	print_tunnel(&p);
	fputc('\n', stdout);
	return 0;
}

static int do_add(int cmd, int argc, char **argv)
{
	struct ip6_tnl_parm2 p;
	const char *basedev = "ip6tnl0";

	ip6_tnl_parm_init(&p, 1);

	if (parse_args(argc, argv, cmd, &p) < 0)
		return -1;

	if (p.proto == IPPROTO_GRE)
		basedev = "ip6gre0";
	else if (p.i_flags & VTI_ISVTI)
		basedev = "ip6_vti0";

	return tnl_add_ioctl(cmd, basedev, p.name, &p);
}

static int do_del(int argc, char **argv)
{
	struct ip6_tnl_parm2 p;
	const char *basedev = "ip6tnl0";

	ip6_tnl_parm_init(&p, 1);

	if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
		return -1;

	if (p.proto == IPPROTO_GRE)
		basedev = "ip6gre0";
	else if (p.i_flags & VTI_ISVTI)
		basedev = "ip6_vti0";

	return tnl_del_ioctl(basedev, p.name, &p);
}

int do_ip6tunnel(int argc, char **argv)
{
	switch (preferred_family) {
	case AF_UNSPEC:
		preferred_family = AF_INET6;
		break;
	case AF_INET6:
		break;
	default:
		fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
		exit(-1);
	}

	if (argc > 0) {
		if (matches(*argv, "add") == 0)
			return do_add(SIOCADDTUNNEL, argc - 1, argv + 1);
		if (matches(*argv, "change") == 0)
			return do_add(SIOCCHGTUNNEL, argc - 1, argv + 1);
		if (matches(*argv, "delete") == 0)
			return do_del(argc - 1, argv + 1);
		if (matches(*argv, "show") == 0 ||
		    matches(*argv, "lst") == 0 ||
		    matches(*argv, "list") == 0)
			return do_show(argc - 1, argv + 1);
		if (matches(*argv, "help") == 0)
			usage();
	} else
		return do_show(0, NULL);

	fprintf(stderr, "Command \"%s\" is unknown, try \"ip -f inet6 tunnel help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
9447a0d3 MN	1	/*
9447a0d3 MN	2	* Copyright (C)2006 USAGI/WIDE Project
ae665a52	3	*
9447a0d3 MN	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
ae665a52	8	*
9447a0d3 MN	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
ae665a52	13	*
9447a0d3	14	* You should have received a copy of the GNU General Public License
4d98ab00	15	* along with this program; if not, see <http://www.gnu.org/licenses>.
9447a0d3	16	*/
9447a0d3 MN	17	/*
	18	* Author:
	19	* Masahide NAKAMURA @USAGI
	20	*/
ae665a52	21
9447a0d3 MN	22	#include <stdio.h>
	23	#include <string.h>
	24	#include <stdlib.h>
9447a0d3	25	#include <unistd.h>
288384f2 MN	26	#include <sys/types.h>
288384f2 MN	27	#include <sys/socket.h>
9447a0d3	28	#include <arpa/inet.h>
288384f2	29	#include <sys/ioctl.h>
9447a0d3	30	#include <linux/ip.h>
288384f2 MN	31	#include <linux/if.h>
288384f2 MN	32	#include <linux/if_arp.h>
9447a0d3	33	#include <linux/if_tunnel.h>
288384f2	34	#include <linux/ip6_tunnel.h>
9447a0d3	35
288384f2 MN	36	#include "utils.h"
288384f2 MN	37	#include "tunnel.h"
ea71beac	38	#include "ip_common.h"
9447a0d3	39
288384f2 MN	40	#define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
288384f2 MN	41	#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF)
9447a0d3	42
288384f2 MN	43	#define DEFAULT_TNL_HOP_LIMIT (64)
	44
	45	static void usage(void) __attribute__((noreturn));
9447a0d3 MN	46
	47	static void usage(void)
	48	{
288384f2	49	fprintf(stderr, "Usage: ip -f inet6 tunnel { add \| change \| del \| show } [ NAME ]\n");
f36d1140	50	fprintf(stderr, " [ mode { ip6ip6 \| ipip6 \| ip6gre \| vti6 \| any } ]\n");
288384f2 MN	51	fprintf(stderr, " [ remote ADDR local ADDR ] [ dev PHYS_DEV ]\n");
288384f2 MN	52	fprintf(stderr, " [ encaplimit ELIM ]\n");
56f5daac	53	fprintf(stderr, " [ hoplimit TTL ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n");
288384f2	54	fprintf(stderr, " [ dscp inherit ]\n");
21440d19	55	fprintf(stderr, " [ [no]allow-localremote ]\n");
af89576d	56	fprintf(stderr, " [ [i\|o]seq ] [ [i\|o]key KEY ] [ [i\|o]csum ]\n");
288384f2	57	fprintf(stderr, "\n");
eddde110 YH	58	fprintf(stderr, "Where: NAME := STRING\n");
	59	fprintf(stderr, " ADDR := IPV6_ADDRESS\n");
	60	fprintf(stderr, " ELIM := { none \| 0..255 }(default=%d)\n",
288384f2	61	IPV6_DEFAULT_TNL_ENCAP_LIMIT);
eddde110	62	fprintf(stderr, " TTL := 0..255 (default=%d)\n",
288384f2	63	DEFAULT_TNL_HOP_LIMIT);
d0c8420c	64	fprintf(stderr, " TCLASS := { 0x0..0xff \| inherit }\n");
eddde110	65	fprintf(stderr, " FLOWLABEL := { 0x0..0xfffff \| inherit }\n");
af89576d	66	fprintf(stderr, " KEY := { DOTTED_QUAD \| NUMBER }\n");
9447a0d3 MN	67	exit(-1);
	68	}
	69
3e953938	70	static void print_tunnel(const void *t)
9447a0d3	71	{
3e953938	72	const struct ip6_tnl_parm2 *p = t;
9af72f81 PS	73	char s1[1024];
9af72f81 PS	74	char s2[1024];
9447a0d3	75
9af72f81 PS	76	/* Do not use format_host() for local addr,
	77	* symbolic name will not be useful.
	78	*/
288384f2	79	printf("%s: %s/ipv6 remote %s local %s",
9af72f81 PS	80	p->name,
9af72f81 PS	81	tnl_strproto(p->proto),
a418e451	82	format_host_r(AF_INET6, 16, &p->raddr, s1, sizeof(s1)),
2e96d2cc	83	rt_addr_n2a_r(AF_INET6, 16, &p->laddr, s2, sizeof(s2)));
9447a0d3	84	if (p->link) {
ea71beac	85	const char *n = ll_index_to_name(p->link);
56f5daac	86
9447a0d3 MN	87	if (n)
	88	printf(" dev %s", n);
	89	}
9447a0d3	90
288384f2 MN	91	if (p->flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
	92	printf(" encaplimit none");
	93	else
	94	printf(" encaplimit %u", p->encap_limit);
9447a0d3	95
375560c4 SP	96	if (p->hop_limit)
	97	printf(" hoplimit %u", p->hop_limit);
	98	else
	99	printf(" hoplimit inherit");
9447a0d3	100
288384f2	101	if (p->flags & IP6_TNL_F_USE_ORIG_TCLASS)
eddde110	102	printf(" tclass inherit");
288384f2 MN	103	else {
288384f2 MN	104	__u32 val = ntohl(p->flowinfo & IP6_FLOWINFO_TCLASS);
56f5daac	105
eddde110	106	printf(" tclass 0x%02x", (__u8)(val >> 20));
9447a0d3	107	}
9447a0d3	108
288384f2	109	if (p->flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
eddde110	110	printf(" flowlabel inherit");
288384f2	111	else
eddde110	112	printf(" flowlabel 0x%05x", ntohl(p->flowinfo & IP6_FLOWINFO_FLOWLABEL));
9447a0d3	113
288384f2	114	printf(" (flowinfo 0x%08x)", ntohl(p->flowinfo));
9447a0d3	115
288384f2 MN	116	if (p->flags & IP6_TNL_F_RCV_DSCP_COPY)
288384f2 MN	117	printf(" dscp inherit");
af89576d	118
21440d19 SL	119	if (p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE)
	120	printf(" allow-localremote");
	121
40f9070d DF	122	if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) &&
	123	p->o_key == p->i_key)
	124	printf(" key %u", ntohl(p->i_key));
	125	else {
	126	if (p->i_flags & GRE_KEY)
	127	printf(" ikey %u", ntohl(p->i_key));
	128	if (p->o_flags & GRE_KEY)
	129	printf(" okey %u", ntohl(p->o_key));
	130	}
af89576d	131
40f9070d	132	if (p->proto == IPPROTO_GRE) {
04ce8d3e	133	if (p->i_flags & GRE_SEQ)
4cb8d030	134	printf("%s Drop packets out of sequence.", _SL_);
04ce8d3e	135	if (p->i_flags & GRE_CSUM)
af89576d	136	printf("%s Checksum in received packet is required.", _SL_);
04ce8d3e	137	if (p->o_flags & GRE_SEQ)
af89576d	138	printf("%s Sequence packets on output.", _SL_);
04ce8d3e	139	if (p->o_flags & GRE_CSUM)
af89576d	140	printf("%s Checksum output packets.", _SL_);
af89576d	141	}
9447a0d3 MN	142	}
9447a0d3 MN	143
af89576d	144	static int parse_args(int argc, char *argv, int cmd, struct ip6_tnl_parm2 p)
9447a0d3	145	{
21a5a6b3	146	int count = 0;
26111ab1	147	const char *medium = NULL;
9447a0d3 MN	148
9447a0d3 MN	149	while (argc > 0) {
0b959b0f YH	150	if (strcmp(*argv, "mode") == 0) {
	151	NEXT_ARG();
	152	if (strcmp(*argv, "ipv6/ipv6") == 0 \|\|
	153	strcmp(*argv, "ip6ip6") == 0)
	154	p->proto = IPPROTO_IPV6;
f36d1140 SK	155	else if (strcmp(*argv, "vti6") == 0) {
	156	p->proto = IPPROTO_IPV6;
	157	p->i_flags \|= VTI_ISVTI;
	158	} else if (strcmp(*argv, "ip/ipv6") == 0 \|\|
0b959b0f YH	159	strcmp(*argv, "ipv4/ipv6") == 0 \|\|
	160	strcmp(*argv, "ipip6") == 0 \|\|
	161	strcmp(*argv, "ip4ip6") == 0)
	162	p->proto = IPPROTO_IPIP;
af89576d	163	else if (strcmp(*argv, "ip6gre") == 0 \|\|
	164	strcmp(*argv, "gre/ipv6") == 0)
	165	p->proto = IPPROTO_GRE;
0b959b0f YH	166	else if (strcmp(*argv, "any/ipv6") == 0 \|\|
	167	strcmp(*argv, "any") == 0)
	168	p->proto = 0;
	169	else {
56f5daac	170	fprintf(stderr, "Unknown tunnel mode \"%s\"\n", *argv);
4b726cb1 SH	171	exit(-1);
	172	}
	173	} else if (strcmp(*argv, "remote") == 0) {
288384f2	174	inet_prefix raddr;
56f5daac	175
288384f2	176	NEXT_ARG();
9aceaad7	177	get_addr(&raddr, *argv, AF_INET6);
288384f2 MN	178	memcpy(&p->raddr, &raddr.data, sizeof(p->raddr));
	179	} else if (strcmp(*argv, "local") == 0) {
	180	inet_prefix laddr;
56f5daac	181
288384f2	182	NEXT_ARG();
9aceaad7	183	get_addr(&laddr, *argv, AF_INET6);
288384f2 MN	184	memcpy(&p->laddr, &laddr.data, sizeof(p->laddr));
	185	} else if (strcmp(*argv, "dev") == 0) {
	186	NEXT_ARG();
26111ab1	187	medium = *argv;
288384f2 MN	188	} else if (strcmp(*argv, "encaplimit") == 0) {
	189	NEXT_ARG();
	190	if (strcmp(*argv, "none") == 0) {
	191	p->flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
9447a0d3 MN	192	} else {
9447a0d3 MN	193	__u8 uval;
56f5daac	194
288384f2 MN	195	if (get_u8(&uval, *argv, 0) < -1)
288384f2 MN	196	invarg("invalid ELIM", *argv);
9447a0d3	197	p->encap_limit = uval;
3f83dce5	198	p->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
9447a0d3	199	}
eddde110 YH	200	} else if (strcmp(*argv, "hoplimit") == 0 \|\|
	201	strcmp(*argv, "ttl") == 0 \|\|
	202	strcmp(*argv, "hlim") == 0) {
288384f2	203	__u8 uval;
56f5daac	204
288384f2 MN	205	NEXT_ARG();
288384f2 MN	206	if (get_u8(&uval, *argv, 0))
eddde110	207	invarg("invalid TTL", *argv);
288384f2	208	p->hop_limit = uval;
eddde110 YH	209	} else if (strcmp(*argv, "tclass") == 0 \|\|
	210	strcmp(*argv, "tc") == 0 \|\|
	211	strcmp(*argv, "tos") == 0 \|\|
	212	matches(*argv, "dsfield") == 0) {
288384f2	213	__u8 uval;
56f5daac	214
288384f2	215	NEXT_ARG();
df5574d0	216	p->flowinfo &= ~IP6_FLOWINFO_TCLASS;
288384f2 MN	217	if (strcmp(*argv, "inherit") == 0)
	218	p->flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	219	else {
	220	if (get_u8(&uval, *argv, 16))
eddde110	221	invarg("invalid TClass", *argv);
288384f2 MN	222	p->flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	223	p->flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	224	}
eddde110 YH	225	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
eddde110 YH	226	strcmp(*argv, "fl") == 0) {
288384f2	227	__u32 uval;
56f5daac	228
288384f2	229	NEXT_ARG();
df5574d0	230	p->flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
288384f2 MN	231	if (strcmp(*argv, "inherit") == 0)
	232	p->flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	233	else {
	234	if (get_u32(&uval, *argv, 16))
eddde110	235	invarg("invalid Flowlabel", *argv);
288384f2	236	if (uval > 0xFFFFF)
eddde110	237	invarg("invalid Flowlabel", *argv);
288384f2 MN	238	p->flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	239	p->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	240	}
	241	} else if (strcmp(*argv, "dscp") == 0) {
	242	NEXT_ARG();
	243	if (strcmp(*argv, "inherit") != 0)
	244	invarg("not inherit", *argv);
	245	p->flags \|= IP6_TNL_F_RCV_DSCP_COPY;
21440d19 SL	246	} else if (strcmp(*argv, "allow-localremote") == 0) {
	247	p->flags \|= IP6_TNL_F_ALLOW_LOCAL_REMOTE;
	248	} else if (strcmp(*argv, "noallow-localremote") == 0) {
	249	p->flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE;
af89576d	250	} else if (strcmp(*argv, "key") == 0) {
af89576d	251	NEXT_ARG();
	252	p->i_flags \|= GRE_KEY;
	253	p->o_flags \|= GRE_KEY;
a7ed1520	254	p->i_key = p->o_key = tnl_parse_key("key", *argv);
af89576d	255	} else if (strcmp(*argv, "ikey") == 0) {
af89576d	256	NEXT_ARG();
af89576d	257	p->i_flags \|= GRE_KEY;
a7ed1520	258	p->i_key = tnl_parse_key("ikey", *argv);
af89576d	259	} else if (strcmp(*argv, "okey") == 0) {
af89576d	260	NEXT_ARG();
af89576d	261	p->o_flags \|= GRE_KEY;
a7ed1520	262	p->o_key = tnl_parse_key("okey", *argv);
af89576d	263	} else if (strcmp(*argv, "seq") == 0) {
	264	p->i_flags \|= GRE_SEQ;
	265	p->o_flags \|= GRE_SEQ;
	266	} else if (strcmp(*argv, "iseq") == 0) {
	267	p->i_flags \|= GRE_SEQ;
	268	} else if (strcmp(*argv, "oseq") == 0) {
	269	p->o_flags \|= GRE_SEQ;
	270	} else if (strcmp(*argv, "csum") == 0) {
	271	p->i_flags \|= GRE_CSUM;
	272	p->o_flags \|= GRE_CSUM;
	273	} else if (strcmp(*argv, "icsum") == 0) {
	274	p->i_flags \|= GRE_CSUM;
	275	} else if (strcmp(*argv, "ocsum") == 0) {
	276	p->o_flags \|= GRE_CSUM;
9447a0d3	277	} else {
288384f2 MN	278	if (strcmp(*argv, "name") == 0) {
288384f2 MN	279	NEXT_ARG();
7894ce77	280	} else if (matches(*argv, "help") == 0)
9447a0d3	281	usage();
288384f2 MN	282	if (p->name[0])
288384f2 MN	283	duparg2("name", *argv);
625df645 PS	284	if (get_ifname(p->name, *argv))
625df645 PS	285	invarg("\"name\" not a valid ifname", *argv);
21a5a6b3	286	if (cmd == SIOCCHGTUNNEL && count == 0) {
d17b136f	287	struct ip6_tnl_parm2 old_p = {};
56f5daac	288
21a5a6b3 JB	289	if (tnl_get_ioctl(*argv, &old_p))
	290	return -1;
	291	*p = old_p;
	292	}
9447a0d3	293	}
21a5a6b3	294	count++;
9447a0d3 MN	295	argc--; argv++;
9447a0d3 MN	296	}
26111ab1	297	if (medium) {
ea71beac	298	p->link = ll_name_to_index(medium);
fe99adbc SP	299	if (!p->link)
fe99adbc SP	300	return nodev(medium);
9447a0d3 MN	301	}
	302	return 0;
	303	}
	304
af89576d	305	static void ip6_tnl_parm_init(struct ip6_tnl_parm2 *p, int apply_default)
288384f2 MN	306	{
	307	memset(p, 0, sizeof(*p));
	308	p->proto = IPPROTO_IPV6;
	309	if (apply_default) {
	310	p->hop_limit = DEFAULT_TNL_HOP_LIMIT;
	311	p->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	312	}
	313	}
	314
3e953938 SP	315	static void ip6_tnl_parm_initialize(const struct tnl_print_nlmsg_info *info)
	316	{
	317	const struct ifinfomsg *ifi = info->ifi;
	318	const struct ip6_tnl_parm2 *p1 = info->p1;
	319	struct ip6_tnl_parm2 *p2 = info->p2;
	320
	321	ip6_tnl_parm_init(p2, 0);
	322	if (ifi->ifi_type == ARPHRD_IP6GRE)
	323	p2->proto = IPPROTO_GRE;
	324	p2->link = ifi->ifi_index;
	325	strcpy(p2->name, p1->name);
	326	}
	327
	328	static bool ip6_tnl_parm_match(const struct tnl_print_nlmsg_info *info)
288384f2	329	{
3e953938 SP	330	const struct ip6_tnl_parm2 *p1 = info->p1;
	331	const struct ip6_tnl_parm2 *p2 = info->p2;
	332
288384f2 MN	333	return ((!p1->link \|\| p1->link == p2->link) &&
288384f2 MN	334	(!p1->name[0] \|\| strcmp(p1->name, p2->name) == 0) &&
1f4c51c0 JB	335	(IN6_IS_ADDR_UNSPECIFIED(&p1->laddr) \|\|
	336	IN6_ARE_ADDR_EQUAL(&p1->laddr, &p2->laddr)) &&
	337	(IN6_IS_ADDR_UNSPECIFIED(&p1->raddr) \|\|
	338	IN6_ARE_ADDR_EQUAL(&p1->raddr, &p2->raddr)) &&
288384f2 MN	339	(!p1->proto \|\| !p2->proto \|\| p1->proto == p2->proto) &&
	340	(!p1->encap_limit \|\| p1->encap_limit == p2->encap_limit) &&
	341	(!p1->hop_limit \|\| p1->hop_limit == p2->hop_limit) &&
	342	(!(p1->flowinfo & IP6_FLOWINFO_TCLASS) \|\|
	343	!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_TCLASS)) &&
	344	(!(p1->flowinfo & IP6_FLOWINFO_FLOWLABEL) \|\|
	345	!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_FLOWLABEL)) &&
	346	(!p1->flags \|\| (p1->flags & p2->flags)));
	347	}
	348
9447a0d3 MN	349	static int do_show(int argc, char **argv)
9447a0d3 MN	350	{
3e953938	351	struct ip6_tnl_parm2 p, p1;
288384f2 MN	352
288384f2 MN	353	ip6_tnl_parm_init(&p, 0);
c3651bf4	354	p.proto = 0; /* default to any */
9447a0d3	355
56f5daac SH	356	if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
56f5daac SH	357	return -1;
9447a0d3	358
3e953938 SP	359	if (!p.name[0] \|\| show_stats) {
	360	struct tnl_print_nlmsg_info info = {
	361	.p1 = &p,
	362	.p2 = &p1,
	363	.init = ip6_tnl_parm_initialize,
	364	.match = ip6_tnl_parm_match,
	365	.print = print_tunnel,
	366	};
	367
	368	return do_tunnels_list(&info);
	369	}
ec895940 SP	370
	371	if (tnl_get_ioctl(p.name, &p))
	372	return -1;
9447a0d3	373
ec895940 SP	374	print_tunnel(&p);
ec895940 SP	375	fputc('\n', stdout);
56f5daac	376	return 0;
9447a0d3 MN	377	}
9447a0d3 MN	378
9447a0d3 MN	379	static int do_add(int cmd, int argc, char **argv)
9447a0d3 MN	380	{
af89576d	381	struct ip6_tnl_parm2 p;
a0638e18	382	const char *basedev = "ip6tnl0";
288384f2 MN	383
288384f2 MN	384	ip6_tnl_parm_init(&p, 1);
9447a0d3	385
21a5a6b3	386	if (parse_args(argc, argv, cmd, &p) < 0)
9447a0d3	387	return -1;
288384f2	388
a0638e18 AA	389	if (p.proto == IPPROTO_GRE)
	390	basedev = "ip6gre0";
	391	else if (p.i_flags & VTI_ISVTI)
	392	basedev = "ip6_vti0";
	393
	394	return tnl_add_ioctl(cmd, basedev, p.name, &p);
9447a0d3 MN	395	}
9447a0d3 MN	396
288384f2	397	static int do_del(int argc, char **argv)
9447a0d3	398	{
af89576d	399	struct ip6_tnl_parm2 p;
a0638e18	400	const char *basedev = "ip6tnl0";
288384f2 MN	401
288384f2 MN	402	ip6_tnl_parm_init(&p, 1);
9447a0d3	403
21a5a6b3	404	if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
9447a0d3 MN	405	return -1;
9447a0d3 MN	406
a0638e18 AA	407	if (p.proto == IPPROTO_GRE)
	408	basedev = "ip6gre0";
	409	else if (p.i_flags & VTI_ISVTI)
	410	basedev = "ip6_vti0";
	411
	412	return tnl_del_ioctl(basedev, p.name, &p);
9447a0d3 MN	413	}
9447a0d3 MN	414
ae665a52 SH	415	int do_ip6tunnel(int argc, char **argv)
ae665a52 SH	416	{
288384f2 MN	417	switch (preferred_family) {
	418	case AF_UNSPEC:
	419	preferred_family = AF_INET6;
	420	break;
	421	case AF_INET6:
	422	break;
	423	default:
14645ec2	424	fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
288384f2 MN	425	exit(-1);
	426	}
	427
9447a0d3	428	if (argc > 0) {
288384f2	429	if (matches(*argv, "add") == 0)
9447a0d3	430	return do_add(SIOCADDTUNNEL, argc - 1, argv + 1);
288384f2	431	if (matches(*argv, "change") == 0)
9447a0d3	432	return do_add(SIOCCHGTUNNEL, argc - 1, argv + 1);
6e30461e	433	if (matches(*argv, "delete") == 0)
9447a0d3	434	return do_del(argc - 1, argv + 1);
288384f2 MN	435	if (matches(*argv, "show") == 0 \|\|
	436	matches(*argv, "lst") == 0 \|\|
	437	matches(*argv, "list") == 0)
9447a0d3	438	return do_show(argc - 1, argv + 1);
288384f2	439	if (matches(*argv, "help") == 0)
9447a0d3	440	usage();
9447a0d3 MN	441	} else
	442	return do_show(0, NULL);
	443
288384f2 MN	444	fprintf(stderr, "Command \"%s\" is unknown, try \"ip -f inet6 tunnel help\".\n", *argv);
288384f2 MN	445	exit(-1);
9447a0d3	446	}