[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"
		"          [ mode { ip6ip6 | ipip6 | ip6gre | vti6 | any } ]\n"
		"          [ remote ADDR local ADDR ] [ dev PHYS_DEV ]\n"
		"          [ encaplimit ELIM ]\n"
		"          [ hoplimit TTL ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n"
		"          [ dscp inherit ]\n"
		"          [ [no]allow-localremote ]\n"
		"          [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n"
		"\n"
		"Where: NAME      := STRING\n"
		"       ADDR      := IPV6_ADDRESS\n"
		"       ELIM      := { none | 0..255 }(default=%d)\n"
		"       TTL       := 0..255 (default=%d)\n"
		"       TCLASS    := { 0x0..0xff | inherit }\n"
		"       FLOWLABEL := { 0x0..0xfffff | inherit }\n"
		"       KEY       := { DOTTED_QUAD | NUMBER }\n",
		IPV6_DEFAULT_TNL_ENCAP_LIMIT,
		DEFAULT_TNL_HOP_LIMIT);
	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	{
8589eb4e MC	49	fprintf(stderr,
	50	"Usage: ip -f inet6 tunnel { add \| change \| del \| show } [ NAME ]\n"
	51	" [ mode { ip6ip6 \| ipip6 \| ip6gre \| vti6 \| any } ]\n"
	52	" [ remote ADDR local ADDR ] [ dev PHYS_DEV ]\n"
	53	" [ encaplimit ELIM ]\n"
	54	" [ hoplimit TTL ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n"
	55	" [ dscp inherit ]\n"
	56	" [ [no]allow-localremote ]\n"
	57	" [ [i\|o]seq ] [ [i\|o]key KEY ] [ [i\|o]csum ]\n"
	58	"\n"
	59	"Where: NAME := STRING\n"
	60	" ADDR := IPV6_ADDRESS\n"
	61	" ELIM := { none \| 0..255 }(default=%d)\n"
	62	" TTL := 0..255 (default=%d)\n"
	63	" TCLASS := { 0x0..0xff \| inherit }\n"
	64	" FLOWLABEL := { 0x0..0xfffff \| inherit }\n"
	65	" KEY := { DOTTED_QUAD \| NUMBER }\n",
	66	IPV6_DEFAULT_TNL_ENCAP_LIMIT,
288384f2	67	DEFAULT_TNL_HOP_LIMIT);
9447a0d3 MN	68	exit(-1);
	69	}
	70
3e953938	71	static void print_tunnel(const void *t)
9447a0d3	72	{
3e953938	73	const struct ip6_tnl_parm2 *p = t;
9af72f81 PS	74	char s1[1024];
9af72f81 PS	75	char s2[1024];
9447a0d3	76
9af72f81 PS	77	/* Do not use format_host() for local addr,
	78	* symbolic name will not be useful.
	79	*/
288384f2	80	printf("%s: %s/ipv6 remote %s local %s",
9af72f81 PS	81	p->name,
9af72f81 PS	82	tnl_strproto(p->proto),
a418e451	83	format_host_r(AF_INET6, 16, &p->raddr, s1, sizeof(s1)),
2e96d2cc	84	rt_addr_n2a_r(AF_INET6, 16, &p->laddr, s2, sizeof(s2)));
9447a0d3	85	if (p->link) {
ea71beac	86	const char *n = ll_index_to_name(p->link);
56f5daac	87
9447a0d3 MN	88	if (n)
	89	printf(" dev %s", n);
	90	}
9447a0d3	91
288384f2 MN	92	if (p->flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
	93	printf(" encaplimit none");
	94	else
	95	printf(" encaplimit %u", p->encap_limit);
9447a0d3	96
375560c4 SP	97	if (p->hop_limit)
	98	printf(" hoplimit %u", p->hop_limit);
	99	else
	100	printf(" hoplimit inherit");
9447a0d3	101
288384f2	102	if (p->flags & IP6_TNL_F_USE_ORIG_TCLASS)
eddde110	103	printf(" tclass inherit");
288384f2 MN	104	else {
288384f2 MN	105	__u32 val = ntohl(p->flowinfo & IP6_FLOWINFO_TCLASS);
56f5daac	106
eddde110	107	printf(" tclass 0x%02x", (__u8)(val >> 20));
9447a0d3	108	}
9447a0d3	109
288384f2	110	if (p->flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
eddde110	111	printf(" flowlabel inherit");
288384f2	112	else
eddde110	113	printf(" flowlabel 0x%05x", ntohl(p->flowinfo & IP6_FLOWINFO_FLOWLABEL));
9447a0d3	114
288384f2	115	printf(" (flowinfo 0x%08x)", ntohl(p->flowinfo));
9447a0d3	116
288384f2 MN	117	if (p->flags & IP6_TNL_F_RCV_DSCP_COPY)
288384f2 MN	118	printf(" dscp inherit");
af89576d	119
21440d19 SL	120	if (p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE)
	121	printf(" allow-localremote");
	122
40f9070d DF	123	if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) &&
	124	p->o_key == p->i_key)
	125	printf(" key %u", ntohl(p->i_key));
	126	else {
	127	if (p->i_flags & GRE_KEY)
	128	printf(" ikey %u", ntohl(p->i_key));
	129	if (p->o_flags & GRE_KEY)
	130	printf(" okey %u", ntohl(p->o_key));
	131	}
af89576d	132
40f9070d	133	if (p->proto == IPPROTO_GRE) {
04ce8d3e	134	if (p->i_flags & GRE_SEQ)
4cb8d030	135	printf("%s Drop packets out of sequence.", _SL_);
04ce8d3e	136	if (p->i_flags & GRE_CSUM)
af89576d	137	printf("%s Checksum in received packet is required.", _SL_);
04ce8d3e	138	if (p->o_flags & GRE_SEQ)
af89576d	139	printf("%s Sequence packets on output.", _SL_);
04ce8d3e	140	if (p->o_flags & GRE_CSUM)
af89576d	141	printf("%s Checksum output packets.", _SL_);
af89576d	142	}
9447a0d3 MN	143	}
9447a0d3 MN	144
af89576d	145	static int parse_args(int argc, char *argv, int cmd, struct ip6_tnl_parm2 p)
9447a0d3	146	{
21a5a6b3	147	int count = 0;
26111ab1	148	const char *medium = NULL;
9447a0d3 MN	149
9447a0d3 MN	150	while (argc > 0) {
0b959b0f YH	151	if (strcmp(*argv, "mode") == 0) {
	152	NEXT_ARG();
	153	if (strcmp(*argv, "ipv6/ipv6") == 0 \|\|
	154	strcmp(*argv, "ip6ip6") == 0)
	155	p->proto = IPPROTO_IPV6;
f36d1140 SK	156	else if (strcmp(*argv, "vti6") == 0) {
	157	p->proto = IPPROTO_IPV6;
	158	p->i_flags \|= VTI_ISVTI;
	159	} else if (strcmp(*argv, "ip/ipv6") == 0 \|\|
0b959b0f YH	160	strcmp(*argv, "ipv4/ipv6") == 0 \|\|
	161	strcmp(*argv, "ipip6") == 0 \|\|
	162	strcmp(*argv, "ip4ip6") == 0)
	163	p->proto = IPPROTO_IPIP;
af89576d	164	else if (strcmp(*argv, "ip6gre") == 0 \|\|
	165	strcmp(*argv, "gre/ipv6") == 0)
	166	p->proto = IPPROTO_GRE;
0b959b0f YH	167	else if (strcmp(*argv, "any/ipv6") == 0 \|\|
	168	strcmp(*argv, "any") == 0)
	169	p->proto = 0;
	170	else {
56f5daac	171	fprintf(stderr, "Unknown tunnel mode \"%s\"\n", *argv);
4b726cb1 SH	172	exit(-1);
	173	}
	174	} else if (strcmp(*argv, "remote") == 0) {
288384f2	175	inet_prefix raddr;
56f5daac	176
288384f2	177	NEXT_ARG();
9aceaad7	178	get_addr(&raddr, *argv, AF_INET6);
288384f2 MN	179	memcpy(&p->raddr, &raddr.data, sizeof(p->raddr));
	180	} else if (strcmp(*argv, "local") == 0) {
	181	inet_prefix laddr;
56f5daac	182
288384f2	183	NEXT_ARG();
9aceaad7	184	get_addr(&laddr, *argv, AF_INET6);
288384f2 MN	185	memcpy(&p->laddr, &laddr.data, sizeof(p->laddr));
	186	} else if (strcmp(*argv, "dev") == 0) {
	187	NEXT_ARG();
26111ab1	188	medium = *argv;
288384f2 MN	189	} else if (strcmp(*argv, "encaplimit") == 0) {
	190	NEXT_ARG();
	191	if (strcmp(*argv, "none") == 0) {
	192	p->flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
9447a0d3 MN	193	} else {
9447a0d3 MN	194	__u8 uval;
56f5daac	195
288384f2 MN	196	if (get_u8(&uval, *argv, 0) < -1)
288384f2 MN	197	invarg("invalid ELIM", *argv);
9447a0d3	198	p->encap_limit = uval;
3f83dce5	199	p->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
9447a0d3	200	}
eddde110 YH	201	} else if (strcmp(*argv, "hoplimit") == 0 \|\|
	202	strcmp(*argv, "ttl") == 0 \|\|
	203	strcmp(*argv, "hlim") == 0) {
288384f2	204	__u8 uval;
56f5daac	205
288384f2 MN	206	NEXT_ARG();
288384f2 MN	207	if (get_u8(&uval, *argv, 0))
eddde110	208	invarg("invalid TTL", *argv);
288384f2	209	p->hop_limit = uval;
eddde110 YH	210	} else if (strcmp(*argv, "tclass") == 0 \|\|
	211	strcmp(*argv, "tc") == 0 \|\|
	212	strcmp(*argv, "tos") == 0 \|\|
	213	matches(*argv, "dsfield") == 0) {
288384f2	214	__u8 uval;
56f5daac	215
288384f2	216	NEXT_ARG();
df5574d0	217	p->flowinfo &= ~IP6_FLOWINFO_TCLASS;
288384f2 MN	218	if (strcmp(*argv, "inherit") == 0)
	219	p->flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	220	else {
	221	if (get_u8(&uval, *argv, 16))
eddde110	222	invarg("invalid TClass", *argv);
288384f2 MN	223	p->flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	224	p->flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	225	}
eddde110 YH	226	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
eddde110 YH	227	strcmp(*argv, "fl") == 0) {
288384f2	228	__u32 uval;
56f5daac	229
288384f2	230	NEXT_ARG();
df5574d0	231	p->flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
288384f2 MN	232	if (strcmp(*argv, "inherit") == 0)
	233	p->flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	234	else {
	235	if (get_u32(&uval, *argv, 16))
eddde110	236	invarg("invalid Flowlabel", *argv);
288384f2	237	if (uval > 0xFFFFF)
eddde110	238	invarg("invalid Flowlabel", *argv);
288384f2 MN	239	p->flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	240	p->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	241	}
	242	} else if (strcmp(*argv, "dscp") == 0) {
	243	NEXT_ARG();
	244	if (strcmp(*argv, "inherit") != 0)
	245	invarg("not inherit", *argv);
	246	p->flags \|= IP6_TNL_F_RCV_DSCP_COPY;
21440d19 SL	247	} else if (strcmp(*argv, "allow-localremote") == 0) {
	248	p->flags \|= IP6_TNL_F_ALLOW_LOCAL_REMOTE;
	249	} else if (strcmp(*argv, "noallow-localremote") == 0) {
	250	p->flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE;
af89576d	251	} else if (strcmp(*argv, "key") == 0) {
af89576d	252	NEXT_ARG();
	253	p->i_flags \|= GRE_KEY;
	254	p->o_flags \|= GRE_KEY;
a7ed1520	255	p->i_key = p->o_key = tnl_parse_key("key", *argv);
af89576d	256	} else if (strcmp(*argv, "ikey") == 0) {
af89576d	257	NEXT_ARG();
af89576d	258	p->i_flags \|= GRE_KEY;
a7ed1520	259	p->i_key = tnl_parse_key("ikey", *argv);
af89576d	260	} else if (strcmp(*argv, "okey") == 0) {
af89576d	261	NEXT_ARG();
af89576d	262	p->o_flags \|= GRE_KEY;
a7ed1520	263	p->o_key = tnl_parse_key("okey", *argv);
af89576d	264	} else if (strcmp(*argv, "seq") == 0) {
	265	p->i_flags \|= GRE_SEQ;
	266	p->o_flags \|= GRE_SEQ;
	267	} else if (strcmp(*argv, "iseq") == 0) {
	268	p->i_flags \|= GRE_SEQ;
	269	} else if (strcmp(*argv, "oseq") == 0) {
	270	p->o_flags \|= GRE_SEQ;
	271	} else if (strcmp(*argv, "csum") == 0) {
	272	p->i_flags \|= GRE_CSUM;
	273	p->o_flags \|= GRE_CSUM;
	274	} else if (strcmp(*argv, "icsum") == 0) {
	275	p->i_flags \|= GRE_CSUM;
	276	} else if (strcmp(*argv, "ocsum") == 0) {
	277	p->o_flags \|= GRE_CSUM;
9447a0d3	278	} else {
288384f2 MN	279	if (strcmp(*argv, "name") == 0) {
288384f2 MN	280	NEXT_ARG();
7894ce77	281	} else if (matches(*argv, "help") == 0)
9447a0d3	282	usage();
288384f2 MN	283	if (p->name[0])
288384f2 MN	284	duparg2("name", *argv);
625df645 PS	285	if (get_ifname(p->name, *argv))
625df645 PS	286	invarg("\"name\" not a valid ifname", *argv);
21a5a6b3	287	if (cmd == SIOCCHGTUNNEL && count == 0) {
d17b136f	288	struct ip6_tnl_parm2 old_p = {};
56f5daac	289
21a5a6b3 JB	290	if (tnl_get_ioctl(*argv, &old_p))
	291	return -1;
	292	*p = old_p;
	293	}
9447a0d3	294	}
21a5a6b3	295	count++;
9447a0d3 MN	296	argc--; argv++;
9447a0d3 MN	297	}
26111ab1	298	if (medium) {
ea71beac	299	p->link = ll_name_to_index(medium);
fe99adbc SP	300	if (!p->link)
fe99adbc SP	301	return nodev(medium);
9447a0d3 MN	302	}
	303	return 0;
	304	}
	305
af89576d	306	static void ip6_tnl_parm_init(struct ip6_tnl_parm2 *p, int apply_default)
288384f2 MN	307	{
	308	memset(p, 0, sizeof(*p));
	309	p->proto = IPPROTO_IPV6;
	310	if (apply_default) {
	311	p->hop_limit = DEFAULT_TNL_HOP_LIMIT;
	312	p->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	313	}
	314	}
	315
3e953938 SP	316	static void ip6_tnl_parm_initialize(const struct tnl_print_nlmsg_info *info)
	317	{
	318	const struct ifinfomsg *ifi = info->ifi;
	319	const struct ip6_tnl_parm2 *p1 = info->p1;
	320	struct ip6_tnl_parm2 *p2 = info->p2;
	321
	322	ip6_tnl_parm_init(p2, 0);
	323	if (ifi->ifi_type == ARPHRD_IP6GRE)
	324	p2->proto = IPPROTO_GRE;
	325	p2->link = ifi->ifi_index;
	326	strcpy(p2->name, p1->name);
	327	}
	328
	329	static bool ip6_tnl_parm_match(const struct tnl_print_nlmsg_info *info)
288384f2	330	{
3e953938 SP	331	const struct ip6_tnl_parm2 *p1 = info->p1;
	332	const struct ip6_tnl_parm2 *p2 = info->p2;
	333
288384f2 MN	334	return ((!p1->link \|\| p1->link == p2->link) &&
288384f2 MN	335	(!p1->name[0] \|\| strcmp(p1->name, p2->name) == 0) &&
1f4c51c0 JB	336	(IN6_IS_ADDR_UNSPECIFIED(&p1->laddr) \|\|
	337	IN6_ARE_ADDR_EQUAL(&p1->laddr, &p2->laddr)) &&
	338	(IN6_IS_ADDR_UNSPECIFIED(&p1->raddr) \|\|
	339	IN6_ARE_ADDR_EQUAL(&p1->raddr, &p2->raddr)) &&
288384f2 MN	340	(!p1->proto \|\| !p2->proto \|\| p1->proto == p2->proto) &&
	341	(!p1->encap_limit \|\| p1->encap_limit == p2->encap_limit) &&
	342	(!p1->hop_limit \|\| p1->hop_limit == p2->hop_limit) &&
	343	(!(p1->flowinfo & IP6_FLOWINFO_TCLASS) \|\|
	344	!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_TCLASS)) &&
	345	(!(p1->flowinfo & IP6_FLOWINFO_FLOWLABEL) \|\|
	346	!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_FLOWLABEL)) &&
	347	(!p1->flags \|\| (p1->flags & p2->flags)));
	348	}
	349
9447a0d3 MN	350	static int do_show(int argc, char **argv)
9447a0d3 MN	351	{
3e953938	352	struct ip6_tnl_parm2 p, p1;
288384f2 MN	353
288384f2 MN	354	ip6_tnl_parm_init(&p, 0);
c3651bf4	355	p.proto = 0; /* default to any */
9447a0d3	356
56f5daac SH	357	if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
56f5daac SH	358	return -1;
9447a0d3	359
3e953938 SP	360	if (!p.name[0] \|\| show_stats) {
	361	struct tnl_print_nlmsg_info info = {
	362	.p1 = &p,
	363	.p2 = &p1,
	364	.init = ip6_tnl_parm_initialize,
	365	.match = ip6_tnl_parm_match,
	366	.print = print_tunnel,
	367	};
	368
	369	return do_tunnels_list(&info);
	370	}
ec895940 SP	371
	372	if (tnl_get_ioctl(p.name, &p))
	373	return -1;
9447a0d3	374
ec895940 SP	375	print_tunnel(&p);
ec895940 SP	376	fputc('\n', stdout);
56f5daac	377	return 0;
9447a0d3 MN	378	}
9447a0d3 MN	379
9447a0d3 MN	380	static int do_add(int cmd, int argc, char **argv)
9447a0d3 MN	381	{
af89576d	382	struct ip6_tnl_parm2 p;
a0638e18	383	const char *basedev = "ip6tnl0";
288384f2 MN	384
288384f2 MN	385	ip6_tnl_parm_init(&p, 1);
9447a0d3	386
21a5a6b3	387	if (parse_args(argc, argv, cmd, &p) < 0)
9447a0d3	388	return -1;
288384f2	389
a0638e18 AA	390	if (p.proto == IPPROTO_GRE)
	391	basedev = "ip6gre0";
	392	else if (p.i_flags & VTI_ISVTI)
	393	basedev = "ip6_vti0";
	394
	395	return tnl_add_ioctl(cmd, basedev, p.name, &p);
9447a0d3 MN	396	}
9447a0d3 MN	397
288384f2	398	static int do_del(int argc, char **argv)
9447a0d3	399	{
af89576d	400	struct ip6_tnl_parm2 p;
a0638e18	401	const char *basedev = "ip6tnl0";
288384f2 MN	402
288384f2 MN	403	ip6_tnl_parm_init(&p, 1);
9447a0d3	404
21a5a6b3	405	if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
9447a0d3 MN	406	return -1;
9447a0d3 MN	407
a0638e18 AA	408	if (p.proto == IPPROTO_GRE)
	409	basedev = "ip6gre0";
	410	else if (p.i_flags & VTI_ISVTI)
	411	basedev = "ip6_vti0";
	412
	413	return tnl_del_ioctl(basedev, p.name, &p);
9447a0d3 MN	414	}
9447a0d3 MN	415
ae665a52 SH	416	int do_ip6tunnel(int argc, char **argv)
ae665a52 SH	417	{
288384f2 MN	418	switch (preferred_family) {
	419	case AF_UNSPEC:
	420	preferred_family = AF_INET6;
	421	break;
	422	case AF_INET6:
	423	break;
	424	default:
14645ec2	425	fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
288384f2 MN	426	exit(-1);
	427	}
	428
9447a0d3	429	if (argc > 0) {
288384f2	430	if (matches(*argv, "add") == 0)
9447a0d3	431	return do_add(SIOCADDTUNNEL, argc - 1, argv + 1);
288384f2	432	if (matches(*argv, "change") == 0)
9447a0d3	433	return do_add(SIOCCHGTUNNEL, argc - 1, argv + 1);
6e30461e	434	if (matches(*argv, "delete") == 0)
9447a0d3	435	return do_del(argc - 1, argv + 1);
288384f2 MN	436	if (matches(*argv, "show") == 0 \|\|
	437	matches(*argv, "lst") == 0 \|\|
	438	matches(*argv, "list") == 0)
9447a0d3	439	return do_show(argc - 1, argv + 1);
288384f2	440	if (matches(*argv, "help") == 0)
9447a0d3	441	usage();
9447a0d3 MN	442	} else
	443	return do_show(0, NULL);
	444
288384f2 MN	445	fprintf(stderr, "Command \"%s\" is unknown, try \"ip -f inet6 tunnel help\".\n", *argv);
288384f2 MN	446	exit(-1);
9447a0d3	447	}