[mirror_iproute2.git] / ip / link_ip6tnl.c

/*
 * link_ip6tnl.c	ip6tnl 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:	Nicolas Dichtel <nicolas.dichtel@6wind.com>
 *
 */

#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 <linux/ip6_tunnel.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "tunnel.h"

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

#define DEFAULT_TNL_HOP_LIMIT	(64)

static void print_usage(FILE *f)
{
	fprintf(f, "Usage: ip link { add | set | change | replace | del } NAME\n");
	fprintf(f, "          [ mode { ip6ip6 | ipip6 | any } ]\n");
	fprintf(f, "          type ip6tnl [ remote ADDR ] [ local ADDR ]\n");
	fprintf(f, "          [ dev PHYS_DEV ] [ encaplimit ELIM ]\n");
	fprintf(f, "          [ hoplimit HLIM ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n");
	fprintf(f, "          [ dscp inherit ] [ fwmark inherit ]\n");
	fprintf(f, "\n");
	fprintf(f, "Where: NAME      := STRING\n");
	fprintf(f, "       ADDR      := IPV6_ADDRESS\n");
	fprintf(f, "       ELIM      := { none | 0..255 }(default=%d)\n",
		IPV6_DEFAULT_TNL_ENCAP_LIMIT);
	fprintf(f, "       HLIM      := 0..255 (default=%d)\n",
		DEFAULT_TNL_HOP_LIMIT);
	fprintf(f, "       TCLASS    := { 0x0..0xff | inherit }\n");
	fprintf(f, "       FLOWLABEL := { 0x0..0xfffff | inherit }\n");
}

static void usage(void) __attribute__((noreturn));
static void usage(void)
{
	print_usage(stderr);
	exit(-1);
}

static int ip6tunnel_parse_opt(struct link_util *lu, int argc, char **argv,
			       struct nlmsghdr *n)
{
	struct {
		struct nlmsghdr n;
		struct ifinfomsg i;
		char buf[2048];
	} req;
	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
	struct rtattr *tb[IFLA_MAX + 1];
	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
	int len;
	struct in6_addr laddr;
	struct in6_addr raddr;
	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	__u32 flowinfo = 0;
	__u32 flags = 0;
	__u32 link = 0;
	__u8 proto = 0;

	memset(&laddr, 0, sizeof(laddr));
	memset(&raddr, 0, sizeof(raddr));

	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(iptuninfo, IFLA_IPTUN_MAX,
				    linkinfo[IFLA_INFO_DATA]);

		if (iptuninfo[IFLA_IPTUN_LOCAL])
			memcpy(&laddr, RTA_DATA(iptuninfo[IFLA_IPTUN_LOCAL]),
			       sizeof(laddr));

		if (iptuninfo[IFLA_IPTUN_REMOTE])
			memcpy(&raddr, RTA_DATA(iptuninfo[IFLA_IPTUN_REMOTE]),
			       sizeof(raddr));

		if (iptuninfo[IFLA_IPTUN_TTL])
			hop_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]);

		if (iptuninfo[IFLA_IPTUN_ENCAP_LIMIT])
			encap_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_ENCAP_LIMIT]);

		if (iptuninfo[IFLA_IPTUN_FLOWINFO])
			flowinfo = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLOWINFO]);

		if (iptuninfo[IFLA_IPTUN_FLAGS])
			flags = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLAGS]);

		if (iptuninfo[IFLA_IPTUN_LINK])
			link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]);

		if (iptuninfo[IFLA_IPTUN_PROTO])
			proto = rta_getattr_u8(iptuninfo[IFLA_IPTUN_PROTO]);
	}

	while (argc > 0) {
		if (matches(*argv, "mode") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "ipv6/ipv6") == 0 ||
			    strcmp(*argv, "ip6ip6") == 0)
				proto = IPPROTO_IPV6;
			else if (strcmp(*argv, "ip/ipv6") == 0 ||
				 strcmp(*argv, "ipv4/ipv6") == 0 ||
				 strcmp(*argv, "ipip6") == 0 ||
				 strcmp(*argv, "ip4ip6") == 0)
				proto = IPPROTO_IPIP;
			else if (strcmp(*argv, "any/ipv6") == 0 ||
				 strcmp(*argv, "any") == 0)
				proto = 0;
			else
				invarg("Cannot guess tunnel mode.", *argv);
		} else if (strcmp(*argv, "remote") == 0) {
			inet_prefix addr;

			NEXT_ARG();
			get_prefix(&addr, *argv, preferred_family);
			if (addr.family == AF_UNSPEC)
				invarg("\"remote\" address family is AF_UNSPEC", *argv);
			memcpy(&raddr, addr.data, addr.bytelen);
		} else if (strcmp(*argv, "local") == 0) {
			inet_prefix addr;

			NEXT_ARG();
			get_prefix(&addr, *argv, preferred_family);
			if (addr.family == AF_UNSPEC)
				invarg("\"local\" address family is AF_UNSPEC", *argv);
			memcpy(&laddr, addr.data, addr.bytelen);
		} else if (matches(*argv, "dev") == 0) {
			NEXT_ARG();
			link = if_nametoindex(*argv);
			if (link == 0)
				invarg("\"dev\" is invalid", *argv);
		} 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 HLIM", *argv);
			hop_limit = uval;
		} else if (matches(*argv, "encaplimit") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "none") == 0) {
				flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
			} else {
				__u8 uval;

				if (get_u8(&uval, *argv, 0) < -1)
					invarg("invalid ELIM", *argv);
				encap_limit = uval;
				flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
			}
		} else if (strcmp(*argv, "tclass") == 0 ||
			   strcmp(*argv, "tc") == 0 ||
			   strcmp(*argv, "tos") == 0 ||
			   matches(*argv, "dsfield") == 0) {
			__u8 uval;

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

			NEXT_ARG();
			flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
			if (strcmp(*argv, "inherit") == 0)
				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);
				flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
				flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
			}
		} else if (strcmp(*argv, "dscp") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0)
				invarg("not inherit", *argv);
			flags |= IP6_TNL_F_RCV_DSCP_COPY;
		} else if (strcmp(*argv, "fwmark") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0)
				invarg("not inherit", *argv);
			flags |= IP6_TNL_F_USE_ORIG_FWMARK;
		} else
			usage();
		argc--, argv++;
	}

	addattr8(n, 1024, IFLA_IPTUN_PROTO, proto);
	addattr_l(n, 1024, IFLA_IPTUN_LOCAL, &laddr, sizeof(laddr));
	addattr_l(n, 1024, IFLA_IPTUN_REMOTE, &raddr, sizeof(raddr));
	addattr8(n, 1024, IFLA_IPTUN_TTL, hop_limit);
	addattr8(n, 1024, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
	addattr32(n, 1024, IFLA_IPTUN_FLOWINFO, flowinfo);
	addattr32(n, 1024, IFLA_IPTUN_FLAGS, flags);
	addattr32(n, 1024, IFLA_IPTUN_LINK, link);

	return 0;
}

static void ip6tunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	char s2[64];
	int flags = 0;
	__u32 flowinfo = 0;

	if (!tb)
		return;

	if (tb[IFLA_IPTUN_FLAGS])
		flags = rta_getattr_u32(tb[IFLA_IPTUN_FLAGS]);

	if (tb[IFLA_IPTUN_FLOWINFO])
		flowinfo = rta_getattr_u32(tb[IFLA_IPTUN_FLOWINFO]);

	if (tb[IFLA_IPTUN_PROTO]) {
		switch (rta_getattr_u8(tb[IFLA_IPTUN_PROTO])) {
		case IPPROTO_IPIP:
			fprintf(f, "ipip6 ");
			break;
		case IPPROTO_IPV6:
			fprintf(f, "ip6ip6 ");
			break;
		case 0:
			fprintf(f, "any ");
			break;
		}
	}

	if (tb[IFLA_IPTUN_REMOTE]) {
		fprintf(f, "remote %s ",
			rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_REMOTE]));
	}

	if (tb[IFLA_IPTUN_LOCAL]) {
		fprintf(f, "local %s ",
			rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_LOCAL]));
	}

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

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

	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
		printf("encaplimit none ");
	else if (tb[IFLA_IPTUN_ENCAP_LIMIT])
		fprintf(f, "encaplimit %u ",
			rta_getattr_u8(tb[IFLA_IPTUN_ENCAP_LIMIT]));

	if (tb[IFLA_IPTUN_TTL])
		fprintf(f, "hoplimit %u ", rta_getattr_u8(tb[IFLA_IPTUN_TTL]));

	if (flags & IP6_TNL_F_USE_ORIG_TCLASS)
		printf("tclass inherit ");
	else if (tb[IFLA_IPTUN_FLOWINFO]) {
		__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS);

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

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

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

	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
		printf("dscp inherit ");

	if (flags & IP6_TNL_F_MIP6_DEV)
		fprintf(f, "mip6 ");

	if (flags & IP6_TNL_F_USE_ORIG_FWMARK)
		fprintf(f, "fwmark inherit ");
}

static void ip6tunnel_print_help(struct link_util *lu, int argc, char **argv,
	FILE *f)
{
	print_usage(f);
}

struct link_util ip6tnl_link_util = {
	.id = "ip6tnl",
	.maxattr = IFLA_IPTUN_MAX,
	.parse_opt = ip6tunnel_parse_opt,
	.print_opt = ip6tunnel_print_opt,
	.print_help = ip6tunnel_print_help,
};
Commit	Line	Data
9d0efc10 ND	1	/*
	2	* link_ip6tnl.c ip6tnl 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: Nicolas Dichtel <nicolas.dichtel@6wind.com>
	10	*
	11	*/
	12
	13	#include <string.h>
	14	#include <net/if.h>
	15	#include <sys/types.h>
	16	#include <sys/socket.h>
	17	#include <arpa/inet.h>
	18
	19	#include <linux/ip.h>
	20	#include <linux/if_tunnel.h>
	21	#include <linux/ip6_tunnel.h>
	22	#include "rt_names.h"
	23	#include "utils.h"
	24	#include "ip_common.h"
	25	#include "tunnel.h"
	26
	27	#define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
	28	#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF)
	29
	30	#define DEFAULT_TNL_HOP_LIMIT (64)
	31
561e650e	32	static void print_usage(FILE *f)
9d0efc10	33	{
561e650e	34	fprintf(f, "Usage: ip link { add \| set \| change \| replace \| del } NAME\n");
	35	fprintf(f, " [ mode { ip6ip6 \| ipip6 \| any } ]\n");
	36	fprintf(f, " type ip6tnl [ remote ADDR ] [ local ADDR ]\n");
	37	fprintf(f, " [ dev PHYS_DEV ] [ encaplimit ELIM ]\n");
56f5daac	38	fprintf(f, " [ hoplimit HLIM ] [ tclass TCLASS ] [ flowlabel FLOWLABEL ]\n");
561e650e	39	fprintf(f, " [ dscp inherit ] [ fwmark inherit ]\n");
	40	fprintf(f, "\n");
	41	fprintf(f, "Where: NAME := STRING\n");
	42	fprintf(f, " ADDR := IPV6_ADDRESS\n");
	43	fprintf(f, " ELIM := { none \| 0..255 }(default=%d)\n",
9d0efc10	44	IPV6_DEFAULT_TNL_ENCAP_LIMIT);
561e650e	45	fprintf(f, " HLIM := 0..255 (default=%d)\n",
9d0efc10	46	DEFAULT_TNL_HOP_LIMIT);
561e650e	47	fprintf(f, " TCLASS := { 0x0..0xff \| inherit }\n");
	48	fprintf(f, " FLOWLABEL := { 0x0..0xfffff \| inherit }\n");
	49	}
	50
	51	static void usage(void) __attribute__((noreturn));
	52	static void usage(void)
	53	{
	54	print_usage(stderr);
9d0efc10 ND	55	exit(-1);
	56	}
	57
	58	static int ip6tunnel_parse_opt(struct link_util lu, int argc, char *argv,
	59	struct nlmsghdr *n)
	60	{
	61	struct {
	62	struct nlmsghdr n;
	63	struct ifinfomsg i;
	64	char buf[2048];
	65	} req;
	66	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
	67	struct rtattr *tb[IFLA_MAX + 1];
	68	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	69	struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
	70	int len;
	71	struct in6_addr laddr;
	72	struct in6_addr raddr;
	73	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
	74	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	75	__u32 flowinfo = 0;
	76	__u32 flags = 0;
	77	__u32 link = 0;
	78	__u8 proto = 0;
	79
	80	memset(&laddr, 0, sizeof(laddr));
	81	memset(&raddr, 0, sizeof(raddr));
	82
	83	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
	84	memset(&req, 0, sizeof(req));
	85
	86	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
	87	req.n.nlmsg_flags = NLM_F_REQUEST;
	88	req.n.nlmsg_type = RTM_GETLINK;
	89	req.i.ifi_family = preferred_family;
	90	req.i.ifi_index = ifi->ifi_index;
	91
c079e121	92	if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
9d0efc10 ND	93	get_failed:
	94	fprintf(stderr,
	95	"Failed to get existing tunnel info.\n");
	96	return -1;
	97	}
	98
	99	len = req.n.nlmsg_len;
	100	len -= NLMSG_LENGTH(sizeof(*ifi));
	101	if (len < 0)
	102	goto get_failed;
	103
	104	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len);
	105
	106	if (!tb[IFLA_LINKINFO])
	107	goto get_failed;
	108
	109	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	110
	111	if (!linkinfo[IFLA_INFO_DATA])
	112	goto get_failed;
	113
	114	parse_rtattr_nested(iptuninfo, IFLA_IPTUN_MAX,
	115	linkinfo[IFLA_INFO_DATA]);
	116
	117	if (iptuninfo[IFLA_IPTUN_LOCAL])
	118	memcpy(&laddr, RTA_DATA(iptuninfo[IFLA_IPTUN_LOCAL]),
	119	sizeof(laddr));
	120
	121	if (iptuninfo[IFLA_IPTUN_REMOTE])
	122	memcpy(&raddr, RTA_DATA(iptuninfo[IFLA_IPTUN_REMOTE]),
	123	sizeof(raddr));
	124
	125	if (iptuninfo[IFLA_IPTUN_TTL])
	126	hop_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]);
	127
	128	if (iptuninfo[IFLA_IPTUN_ENCAP_LIMIT])
	129	encap_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_ENCAP_LIMIT]);
	130
	131	if (iptuninfo[IFLA_IPTUN_FLOWINFO])
	132	flowinfo = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLOWINFO]);
	133
	134	if (iptuninfo[IFLA_IPTUN_FLAGS])
	135	flags = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLAGS]);
	136
	137	if (iptuninfo[IFLA_IPTUN_LINK])
	138	link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]);
	139
	140	if (iptuninfo[IFLA_IPTUN_PROTO])
	141	proto = rta_getattr_u8(iptuninfo[IFLA_IPTUN_PROTO]);
	142	}
	143
	144	while (argc > 0) {
	145	if (matches(*argv, "mode") == 0) {
	146	NEXT_ARG();
	147	if (strcmp(*argv, "ipv6/ipv6") == 0 \|\|
	148	strcmp(*argv, "ip6ip6") == 0)
	149	proto = IPPROTO_IPV6;
	150	else if (strcmp(*argv, "ip/ipv6") == 0 \|\|
	151	strcmp(*argv, "ipv4/ipv6") == 0 \|\|
	152	strcmp(*argv, "ipip6") == 0 \|\|
	153	strcmp(*argv, "ip4ip6") == 0)
	154	proto = IPPROTO_IPIP;
	155	else if (strcmp(*argv, "any/ipv6") == 0 \|\|
	156	strcmp(*argv, "any") == 0)
157	proto = 0;
158	else
159	invarg("Cannot guess tunnel mode.", *argv);
160	} else if (strcmp(*argv, "remote") == 0) {
161	inet_prefix addr;
56f5daac	162
9d0efc10 ND	163	NEXT_ARG();
	164	get_prefix(&addr, *argv, preferred_family);
	165	if (addr.family == AF_UNSPEC)
	166	invarg("\"remote\" address family is AF_UNSPEC", *argv);
	167	memcpy(&raddr, addr.data, addr.bytelen);
	168	} else if (strcmp(*argv, "local") == 0) {
	169	inet_prefix addr;
56f5daac	170
9d0efc10 ND	171	NEXT_ARG();
	172	get_prefix(&addr, *argv, preferred_family);
	173	if (addr.family == AF_UNSPEC)
	174	invarg("\"local\" address family is AF_UNSPEC", *argv);
	175	memcpy(&laddr, addr.data, addr.bytelen);
	176	} else if (matches(*argv, "dev") == 0) {
	177	NEXT_ARG();
	178	link = if_nametoindex(*argv);
	179	if (link == 0)
	180	invarg("\"dev\" is invalid", *argv);
	181	} else if (strcmp(*argv, "hoplimit") == 0 \|\|
	182	strcmp(*argv, "ttl") == 0 \|\|
	183	strcmp(*argv, "hlim") == 0) {
	184	__u8 uval;
56f5daac	185
9d0efc10 ND	186	NEXT_ARG();
	187	if (get_u8(&uval, *argv, 0))
	188	invarg("invalid HLIM", *argv);
	189	hop_limit = uval;
	190	} else if (matches(*argv, "encaplimit") == 0) {
	191	NEXT_ARG();
	192	if (strcmp(*argv, "none") == 0) {
	193	flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
	194	} else {
	195	__u8 uval;
56f5daac	196
9d0efc10 ND	197	if (get_u8(&uval, *argv, 0) < -1)
	198	invarg("invalid ELIM", *argv);
	199	encap_limit = uval;
	200	flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
	201	}
	202	} else if (strcmp(*argv, "tclass") == 0 \|\|
	203	strcmp(*argv, "tc") == 0 \|\|
	204	strcmp(*argv, "tos") == 0 \|\|
	205	matches(*argv, "dsfield") == 0) {
	206	__u8 uval;
56f5daac	207
9d0efc10 ND	208	NEXT_ARG();
	209	flowinfo &= ~IP6_FLOWINFO_TCLASS;
	210	if (strcmp(*argv, "inherit") == 0)
	211	flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	212	else {
	213	if (get_u8(&uval, *argv, 16))
	214	invarg("invalid TClass", *argv);
	215	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	216	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	217	}
	218	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	219	strcmp(*argv, "fl") == 0) {
	220	__u32 uval;
56f5daac	221
9d0efc10 ND	222	NEXT_ARG();
	223	flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
	224	if (strcmp(*argv, "inherit") == 0)
	225	flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	226	else {
	227	if (get_u32(&uval, *argv, 16))
	228	invarg("invalid Flowlabel", *argv);
	229	if (uval > 0xFFFFF)
	230	invarg("invalid Flowlabel", *argv);
	231	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	232	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	233	}
	234	} else if (strcmp(*argv, "dscp") == 0) {
	235	NEXT_ARG();
	236	if (strcmp(*argv, "inherit") != 0)
	237	invarg("not inherit", *argv);
	238	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
	239	} else if (strcmp(*argv, "fwmark") == 0) {
	240	NEXT_ARG();
	241	if (strcmp(*argv, "inherit") != 0)
	242	invarg("not inherit", *argv);
	243	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
	244	} else
	245	usage();
	246	argc--, argv++;
	247	}
	248
	249	addattr8(n, 1024, IFLA_IPTUN_PROTO, proto);
	250	addattr_l(n, 1024, IFLA_IPTUN_LOCAL, &laddr, sizeof(laddr));
	251	addattr_l(n, 1024, IFLA_IPTUN_REMOTE, &raddr, sizeof(raddr));
	252	addattr8(n, 1024, IFLA_IPTUN_TTL, hop_limit);
	253	addattr8(n, 1024, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
	254	addattr32(n, 1024, IFLA_IPTUN_FLOWINFO, flowinfo);
	255	addattr32(n, 1024, IFLA_IPTUN_FLAGS, flags);
	256	addattr32(n, 1024, IFLA_IPTUN_LINK, link);
	257
	258	return 0;
	259	}
	260
	261	static void ip6tunnel_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	262	{
9d0efc10 ND	263	char s2[64];
	264	int flags = 0;
	265	__u32 flowinfo = 0;
	266
	267	if (!tb)
	268	return;
	269
	270	if (tb[IFLA_IPTUN_FLAGS])
	271	flags = rta_getattr_u32(tb[IFLA_IPTUN_FLAGS]);
	272
	273	if (tb[IFLA_IPTUN_FLOWINFO])
	274	flowinfo = rta_getattr_u32(tb[IFLA_IPTUN_FLOWINFO]);
	275
	276	if (tb[IFLA_IPTUN_PROTO]) {
	277	switch (rta_getattr_u8(tb[IFLA_IPTUN_PROTO])) {
	278	case IPPROTO_IPIP:
	279	fprintf(f, "ipip6 ");
	280	break;
	281	case IPPROTO_IPV6:
	282	fprintf(f, "ip6ip6 ");
	283	break;
	284	case 0:
	285	fprintf(f, "any ");
	286	break;
	287	}
	288	}
	289
	290	if (tb[IFLA_IPTUN_REMOTE]) {
	291	fprintf(f, "remote %s ",
7faf1588	292	rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_REMOTE]));
9d0efc10 ND	293	}
	294
	295	if (tb[IFLA_IPTUN_LOCAL]) {
	296	fprintf(f, "local %s ",
7faf1588	297	rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_LOCAL]));
9d0efc10 ND	298	}
	299
	300	if (tb[IFLA_IPTUN_LINK] && rta_getattr_u32(tb[IFLA_IPTUN_LINK])) {
56f5daac	301	unsigned int link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
9d0efc10 ND	302	const char *n = if_indextoname(link, s2);
	303
	304	if (n)
	305	fprintf(f, "dev %s ", n);
	306	else
	307	fprintf(f, "dev %u ", link);
	308	}
	309
	310	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
	311	printf("encaplimit none ");
	312	else if (tb[IFLA_IPTUN_ENCAP_LIMIT])
	313	fprintf(f, "encaplimit %u ",
	314	rta_getattr_u8(tb[IFLA_IPTUN_ENCAP_LIMIT]));
	315
	316	if (tb[IFLA_IPTUN_TTL])
	317	fprintf(f, "hoplimit %u ", rta_getattr_u8(tb[IFLA_IPTUN_TTL]));
	318
	319	if (flags & IP6_TNL_F_USE_ORIG_TCLASS)
	320	printf("tclass inherit ");
	321	else if (tb[IFLA_IPTUN_FLOWINFO]) {
	322	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS);
	323
	324	printf("tclass 0x%02x ", (__u8)(val >> 20));
	325	}
	326
	327	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
	328	printf("flowlabel inherit ");
	329	else
	330	printf("flowlabel 0x%05x ", ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
	331
	332	printf("(flowinfo 0x%08x) ", ntohl(flowinfo));
	333
	334	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
	335	printf("dscp inherit ");
	336
	337	if (flags & IP6_TNL_F_MIP6_DEV)
	338	fprintf(f, "mip6 ");
	339
	340	if (flags & IP6_TNL_F_USE_ORIG_FWMARK)
	341	fprintf(f, "fwmark inherit ");
	342	}
	343
561e650e	344	static void ip6tunnel_print_help(struct link_util lu, int argc, char *argv,
	345	FILE *f)
	346	{
	347	print_usage(f);
	348	}
	349
9d0efc10 ND	350	struct link_util ip6tnl_link_util = {
	351	.id = "ip6tnl",
	352	.maxattr = IFLA_IPTUN_MAX,
	353	.parse_opt = ip6tunnel_parse_opt,
	354	.print_opt = ip6tunnel_print_opt,
561e650e	355	.print_help = ip6tunnel_print_help,
9d0efc10	356	};