[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(struct ip6_tnl_parm2 *p)
{
	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);

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

	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_prefix(&raddr, *argv, preferred_family);
			if (raddr.family == AF_UNSPEC)
				invarg("\"remote\" address family is AF_UNSPEC", *argv);
			memcpy(&p->raddr, &raddr.data, sizeof(p->raddr));
		} else if (strcmp(*argv, "local") == 0) {
			inet_prefix laddr;

			NEXT_ARG();
			get_prefix(&laddr, *argv, preferred_family);
			if (laddr.family == AF_UNSPEC)
				invarg("\"local\" address family is AF_UNSPEC", *argv);
			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 == 0) {
			fprintf(stderr, "Cannot find device \"%s\"\n", medium);
			return -1;
		}
	}
	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;
	}
}

/*
 * @p1: user specified parameter
 * @p2: database entry
 */
static int ip6_tnl_parm_match(const struct ip6_tnl_parm2 *p1,
			      const struct ip6_tnl_parm2 *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_tunnels_list(struct ip6_tnl_parm2 *p)
{
	char buf[512];
	int err = -1;
	FILE *fp = fopen("/proc/net/dev", "r");

	if (fp == NULL) {
		perror("fopen");
		return -1;
	}

	/* skip two lines at the begenning of the file */
	if (!fgets(buf, sizeof(buf), fp) ||
	    !fgets(buf, sizeof(buf), fp)) {
		fprintf(stderr, "/proc/net/dev read error\n");
		goto end;
	}

	while (fgets(buf, sizeof(buf), fp) != NULL) {
		char name[IFNAMSIZ];
		int index, type;
		struct ip6_tnl_parm2 p1 = {};
		char *ptr;

		buf[sizeof(buf) - 1] = '\0';
		if ((ptr = strchr(buf, ':')) == NULL ||
		    (*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
			fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
			goto end;
		}
		if (p->name[0] && strcmp(p->name, name))
			continue;
		index = ll_name_to_index(name);
		if (index == 0)
			continue;
		type = ll_index_to_type(index);
		if (type == -1) {
			fprintf(stderr, "Failed to get type of \"%s\"\n", name);
			continue;
		}
		if (type != ARPHRD_TUNNEL6 && type != ARPHRD_IP6GRE)
			continue;
		ip6_tnl_parm_init(&p1, 0);
		if (type == ARPHRD_IP6GRE)
			p1.proto = IPPROTO_GRE;
		strcpy(p1.name, name);
		p1.link = ll_name_to_index(p1.name);
		if (p1.link == 0)
			continue;
		if (tnl_get_ioctl(p1.name, &p1))
			continue;
		if (!ip6_tnl_parm_match(p, &p1))
			continue;
		print_tunnel(&p1);
		if (show_stats)
			tnl_print_stats(ptr);
		printf("\n");
	}
	err = 0;
 end:
	fclose(fp);
	return err;
}

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

	ll_init_map(&rth);
	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)
		do_tunnels_list(&p);
	else {
		if (tnl_get_ioctl(p.name, &p))
			return -1;
		print_tunnel(&p);
		printf("\n");
	}

	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
af89576d	70	static void print_tunnel(struct ip6_tnl_parm2 *p)
9447a0d3	71	{
9af72f81 PS	72	char s1[1024];
9af72f81 PS	73	char s2[1024];
9447a0d3	74
9af72f81 PS	75	/* Do not use format_host() for local addr,
	76	* symbolic name will not be useful.
	77	*/
288384f2	78	printf("%s: %s/ipv6 remote %s local %s",
9af72f81 PS	79	p->name,
9af72f81 PS	80	tnl_strproto(p->proto),
a418e451	81	format_host_r(AF_INET6, 16, &p->raddr, s1, sizeof(s1)),
2e96d2cc	82	rt_addr_n2a_r(AF_INET6, 16, &p->laddr, s2, sizeof(s2)));
9447a0d3	83	if (p->link) {
ea71beac	84	const char *n = ll_index_to_name(p->link);
56f5daac	85
9447a0d3 MN	86	if (n)
	87	printf(" dev %s", n);
	88	}
9447a0d3	89
288384f2 MN	90	if (p->flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
	91	printf(" encaplimit none");
	92	else
	93	printf(" encaplimit %u", p->encap_limit);
9447a0d3	94
288384f2	95	printf(" hoplimit %u", p->hop_limit);
9447a0d3	96
288384f2	97	if (p->flags & IP6_TNL_F_USE_ORIG_TCLASS)
eddde110	98	printf(" tclass inherit");
288384f2 MN	99	else {
288384f2 MN	100	__u32 val = ntohl(p->flowinfo & IP6_FLOWINFO_TCLASS);
56f5daac	101
eddde110	102	printf(" tclass 0x%02x", (__u8)(val >> 20));
9447a0d3	103	}
9447a0d3	104
288384f2	105	if (p->flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
eddde110	106	printf(" flowlabel inherit");
288384f2	107	else
eddde110	108	printf(" flowlabel 0x%05x", ntohl(p->flowinfo & IP6_FLOWINFO_FLOWLABEL));
9447a0d3	109
288384f2	110	printf(" (flowinfo 0x%08x)", ntohl(p->flowinfo));
9447a0d3	111
288384f2 MN	112	if (p->flags & IP6_TNL_F_RCV_DSCP_COPY)
288384f2 MN	113	printf(" dscp inherit");
af89576d	114
21440d19 SL	115	if (p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE)
	116	printf(" allow-localremote");
	117
40f9070d DF	118	if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) &&
	119	p->o_key == p->i_key)
	120	printf(" key %u", ntohl(p->i_key));
	121	else {
	122	if (p->i_flags & GRE_KEY)
	123	printf(" ikey %u", ntohl(p->i_key));
	124	if (p->o_flags & GRE_KEY)
	125	printf(" okey %u", ntohl(p->o_key));
	126	}
af89576d	127
40f9070d	128	if (p->proto == IPPROTO_GRE) {
04ce8d3e	129	if (p->i_flags & GRE_SEQ)
4cb8d030	130	printf("%s Drop packets out of sequence.", _SL_);
04ce8d3e	131	if (p->i_flags & GRE_CSUM)
af89576d	132	printf("%s Checksum in received packet is required.", _SL_);
04ce8d3e	133	if (p->o_flags & GRE_SEQ)
af89576d	134	printf("%s Sequence packets on output.", _SL_);
04ce8d3e	135	if (p->o_flags & GRE_CSUM)
af89576d	136	printf("%s Checksum output packets.", _SL_);
af89576d	137	}
9447a0d3 MN	138	}
9447a0d3 MN	139
af89576d	140	static int parse_args(int argc, char *argv, int cmd, struct ip6_tnl_parm2 p)
9447a0d3	141	{
21a5a6b3	142	int count = 0;
26111ab1	143	const char *medium = NULL;
9447a0d3 MN	144
9447a0d3 MN	145	while (argc > 0) {
0b959b0f YH	146	if (strcmp(*argv, "mode") == 0) {
	147	NEXT_ARG();
	148	if (strcmp(*argv, "ipv6/ipv6") == 0 \|\|
	149	strcmp(*argv, "ip6ip6") == 0)
	150	p->proto = IPPROTO_IPV6;
f36d1140 SK	151	else if (strcmp(*argv, "vti6") == 0) {
	152	p->proto = IPPROTO_IPV6;
	153	p->i_flags \|= VTI_ISVTI;
	154	} else if (strcmp(*argv, "ip/ipv6") == 0 \|\|
0b959b0f YH	155	strcmp(*argv, "ipv4/ipv6") == 0 \|\|
	156	strcmp(*argv, "ipip6") == 0 \|\|
	157	strcmp(*argv, "ip4ip6") == 0)
	158	p->proto = IPPROTO_IPIP;
af89576d	159	else if (strcmp(*argv, "ip6gre") == 0 \|\|
	160	strcmp(*argv, "gre/ipv6") == 0)
	161	p->proto = IPPROTO_GRE;
0b959b0f YH	162	else if (strcmp(*argv, "any/ipv6") == 0 \|\|
	163	strcmp(*argv, "any") == 0)
	164	p->proto = 0;
	165	else {
56f5daac	166	fprintf(stderr, "Unknown tunnel mode \"%s\"\n", *argv);
4b726cb1 SH	167	exit(-1);
	168	}
	169	} else if (strcmp(*argv, "remote") == 0) {
288384f2	170	inet_prefix raddr;
56f5daac	171
288384f2 MN	172	NEXT_ARG();
	173	get_prefix(&raddr, *argv, preferred_family);
	174	if (raddr.family == AF_UNSPEC)
	175	invarg("\"remote\" address family is AF_UNSPEC", *argv);
	176	memcpy(&p->raddr, &raddr.data, sizeof(p->raddr));
	177	} else if (strcmp(*argv, "local") == 0) {
	178	inet_prefix laddr;
56f5daac	179
288384f2 MN	180	NEXT_ARG();
	181	get_prefix(&laddr, *argv, preferred_family);
	182	if (laddr.family == AF_UNSPEC)
	183	invarg("\"local\" address family is AF_UNSPEC", *argv);
	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);
6ddb1e8c PS	299	if (p->link == 0) {
6ddb1e8c PS	300	fprintf(stderr, "Cannot find device \"%s\"\n", medium);
9447a0d3	301	return -1;
6ddb1e8c	302	}
9447a0d3 MN	303	}
	304	return 0;
	305	}
	306
af89576d	307	static void ip6_tnl_parm_init(struct ip6_tnl_parm2 *p, int apply_default)
288384f2 MN	308	{
	309	memset(p, 0, sizeof(*p));
	310	p->proto = IPPROTO_IPV6;
	311	if (apply_default) {
	312	p->hop_limit = DEFAULT_TNL_HOP_LIMIT;
	313	p->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	314	}
	315	}
	316
	317	/*
	318	* @p1: user specified parameter
	319	* @p2: database entry
	320	*/
af89576d	321	static int ip6_tnl_parm_match(const struct ip6_tnl_parm2 *p1,
af89576d	322	const struct ip6_tnl_parm2 *p2)
288384f2 MN	323	{
	324	return ((!p1->link \|\| p1->link == p2->link) &&
	325	(!p1->name[0] \|\| strcmp(p1->name, p2->name) == 0) &&
1f4c51c0 JB	326	(IN6_IS_ADDR_UNSPECIFIED(&p1->laddr) \|\|
	327	IN6_ARE_ADDR_EQUAL(&p1->laddr, &p2->laddr)) &&
	328	(IN6_IS_ADDR_UNSPECIFIED(&p1->raddr) \|\|
	329	IN6_ARE_ADDR_EQUAL(&p1->raddr, &p2->raddr)) &&
288384f2 MN	330	(!p1->proto \|\| !p2->proto \|\| p1->proto == p2->proto) &&
	331	(!p1->encap_limit \|\| p1->encap_limit == p2->encap_limit) &&
	332	(!p1->hop_limit \|\| p1->hop_limit == p2->hop_limit) &&
	333	(!(p1->flowinfo & IP6_FLOWINFO_TCLASS) \|\|
	334	!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_TCLASS)) &&
	335	(!(p1->flowinfo & IP6_FLOWINFO_FLOWLABEL) \|\|
	336	!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_FLOWLABEL)) &&
	337	(!p1->flags \|\| (p1->flags & p2->flags)));
	338	}
	339
af89576d	340	static int do_tunnels_list(struct ip6_tnl_parm2 *p)
288384f2 MN	341	{
	342	char buf[512];
	343	int err = -1;
	344	FILE *fp = fopen("/proc/net/dev", "r");
56f5daac	345
288384f2 MN	346	if (fp == NULL) {
288384f2 MN	347	perror("fopen");
c4527d7b	348	return -1;
288384f2 MN	349	}
	350
	351	/* skip two lines at the begenning of the file */
38c867d2 SH	352	if (!fgets(buf, sizeof(buf), fp) \|\|
	353	!fgets(buf, sizeof(buf), fp)) {
	354	fprintf(stderr, "/proc/net/dev read error\n");
c4527d7b	355	goto end;
38c867d2	356	}
288384f2 MN	357
	358	while (fgets(buf, sizeof(buf), fp) != NULL) {
	359	char name[IFNAMSIZ];
ea71beac	360	int index, type;
d17b136f	361	struct ip6_tnl_parm2 p1 = {};
288384f2 MN	362	char *ptr;
	363
	364	buf[sizeof(buf) - 1] = '\0';
	365	if ((ptr = strchr(buf, ':')) == NULL \|\|
	366	(*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
14645ec2	367	fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
288384f2 MN	368	goto end;
288384f2 MN	369	}
288384f2 MN	370	if (p->name[0] && strcmp(p->name, name))
288384f2 MN	371	continue;
ea71beac SH	372	index = ll_name_to_index(name);
	373	if (index == 0)
	374	continue;
	375	type = ll_index_to_type(index);
288384f2	376	if (type == -1) {
14645ec2	377	fprintf(stderr, "Failed to get type of \"%s\"\n", name);
288384f2 MN	378	continue;
288384f2 MN	379	}
af89576d	380	if (type != ARPHRD_TUNNEL6 && type != ARPHRD_IP6GRE)
288384f2	381	continue;
288384f2	382	ip6_tnl_parm_init(&p1, 0);
af89576d	383	if (type == ARPHRD_IP6GRE)
af89576d	384	p1.proto = IPPROTO_GRE;
288384f2	385	strcpy(p1.name, name);
ea71beac	386	p1.link = ll_name_to_index(p1.name);
288384f2 MN	387	if (p1.link == 0)
	388	continue;
	389	if (tnl_get_ioctl(p1.name, &p1))
	390	continue;
	391	if (!ip6_tnl_parm_match(p, &p1))
	392	continue;
	393	print_tunnel(&p1);
7d6aadcd PS	394	if (show_stats)
7d6aadcd PS	395	tnl_print_stats(ptr);
288384f2 MN	396	printf("\n");
	397	}
	398	err = 0;
288384f2	399	end:
c4527d7b	400	fclose(fp);
288384f2 MN	401	return err;
	402	}
	403
9447a0d3 MN	404	static int do_show(int argc, char **argv)
9447a0d3 MN	405	{
56f5daac	406	struct ip6_tnl_parm2 p;
288384f2	407
ea71beac	408	ll_init_map(&rth);
288384f2	409	ip6_tnl_parm_init(&p, 0);
c3651bf4	410	p.proto = 0; /* default to any */
9447a0d3	411
56f5daac SH	412	if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
56f5daac SH	413	return -1;
9447a0d3	414
288384f2 MN	415	if (!p.name[0] \|\| show_stats)
	416	do_tunnels_list(&p);
	417	else {
	418	if (tnl_get_ioctl(p.name, &p))
	419	return -1;
	420	print_tunnel(&p);
	421	printf("\n");
	422	}
9447a0d3	423
56f5daac	424	return 0;
9447a0d3 MN	425	}
9447a0d3 MN	426
9447a0d3 MN	427	static int do_add(int cmd, int argc, char **argv)
9447a0d3 MN	428	{
af89576d	429	struct ip6_tnl_parm2 p;
a0638e18	430	const char *basedev = "ip6tnl0";
288384f2 MN	431
288384f2 MN	432	ip6_tnl_parm_init(&p, 1);
9447a0d3	433
21a5a6b3	434	if (parse_args(argc, argv, cmd, &p) < 0)
9447a0d3	435	return -1;
288384f2	436
a0638e18 AA	437	if (p.proto == IPPROTO_GRE)
	438	basedev = "ip6gre0";
	439	else if (p.i_flags & VTI_ISVTI)
	440	basedev = "ip6_vti0";
	441
	442	return tnl_add_ioctl(cmd, basedev, p.name, &p);
9447a0d3 MN	443	}
9447a0d3 MN	444
288384f2	445	static int do_del(int argc, char **argv)
9447a0d3	446	{
af89576d	447	struct ip6_tnl_parm2 p;
a0638e18	448	const char *basedev = "ip6tnl0";
288384f2 MN	449
288384f2 MN	450	ip6_tnl_parm_init(&p, 1);
9447a0d3	451
21a5a6b3	452	if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
9447a0d3 MN	453	return -1;
9447a0d3 MN	454
a0638e18 AA	455	if (p.proto == IPPROTO_GRE)
	456	basedev = "ip6gre0";
	457	else if (p.i_flags & VTI_ISVTI)
	458	basedev = "ip6_vti0";
	459
	460	return tnl_del_ioctl(basedev, p.name, &p);
9447a0d3 MN	461	}
9447a0d3 MN	462
ae665a52 SH	463	int do_ip6tunnel(int argc, char **argv)
ae665a52 SH	464	{
288384f2 MN	465	switch (preferred_family) {
	466	case AF_UNSPEC:
	467	preferred_family = AF_INET6;
	468	break;
	469	case AF_INET6:
	470	break;
	471	default:
14645ec2	472	fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
288384f2 MN	473	exit(-1);
	474	}
	475
9447a0d3	476	if (argc > 0) {
288384f2	477	if (matches(*argv, "add") == 0)
9447a0d3	478	return do_add(SIOCADDTUNNEL, argc - 1, argv + 1);
288384f2	479	if (matches(*argv, "change") == 0)
9447a0d3	480	return do_add(SIOCCHGTUNNEL, argc - 1, argv + 1);
6e30461e	481	if (matches(*argv, "delete") == 0)
9447a0d3	482	return do_del(argc - 1, argv + 1);
288384f2 MN	483	if (matches(*argv, "show") == 0 \|\|
	484	matches(*argv, "lst") == 0 \|\|
	485	matches(*argv, "list") == 0)
9447a0d3	486	return do_show(argc - 1, argv + 1);
288384f2	487	if (matches(*argv, "help") == 0)
9447a0d3	488	usage();
9447a0d3 MN	489	} else
	490	return do_show(0, NULL);
	491
288384f2 MN	492	fprintf(stderr, "Command \"%s\" is unknown, try \"ip -f inet6 tunnel help\".\n", *argv);
288384f2 MN	493	exit(-1);
9447a0d3	494	}