[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, "          [ noencap ] [ encap { fou | gue | none } ]\n");
	fprintf(f, "          [ encap-sport PORT ] [ encap-dport PORT ]\n");
	fprintf(f, "          [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
	fprintf(f, "\n");
	fprintf(f, "Where: NAME      := STRING\n");
	fprintf(f, "       ADDR      := 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 ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
	struct {
		struct nlmsghdr n;
		struct ifinfomsg i;
		char buf[2048];
	} req = {
		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
		.n.nlmsg_flags = NLM_F_REQUEST,
		.n.nlmsg_type = RTM_GETLINK,
		.i.ifi_family = preferred_family,
		.i.ifi_index = ifi->ifi_index,
	};
	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;
	__u16 encaptype = 0;
	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	__u16 encapsport = 0;
	__u16 encapdport = 0;

	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
		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 (strcmp(*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 if (strcmp(*argv, "noencap") == 0) {
			encaptype = TUNNEL_ENCAP_NONE;
		} else if (strcmp(*argv, "encap") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "fou") == 0)
				encaptype = TUNNEL_ENCAP_FOU;
			else if (strcmp(*argv, "gue") == 0)
				encaptype = TUNNEL_ENCAP_GUE;
			else if (strcmp(*argv, "none") == 0)
				encaptype = TUNNEL_ENCAP_NONE;
			else
				invarg("Invalid encap type.", *argv);
		} else if (strcmp(*argv, "encap-sport") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "auto") == 0)
				encapsport = 0;
			else if (get_u16(&encapsport, *argv, 0))
				invarg("Invalid source port.", *argv);
		} else if (strcmp(*argv, "encap-dport") == 0) {
			NEXT_ARG();
			if (get_u16(&encapdport, *argv, 0))
				invarg("Invalid destination port.", *argv);
		} else if (strcmp(*argv, "encap-csum") == 0) {
			encapflags |= TUNNEL_ENCAP_FLAG_CSUM;
		} else if (strcmp(*argv, "noencap-csum") == 0) {
			encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
		} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
			encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
		} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
			encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
		} else if (strcmp(*argv, "encap-remcsum") == 0) {
			encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
		} else if (strcmp(*argv, "noencap-remcsum") == 0) {
			encapflags |= ~TUNNEL_ENCAP_FLAG_REMCSUM;
		} else
			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);

	addattr16(n, 1024, IFLA_IPTUN_ENCAP_TYPE, encaptype);
	addattr16(n, 1024, IFLA_IPTUN_ENCAP_FLAGS, encapflags);
	addattr16(n, 1024, IFLA_IPTUN_ENCAP_SPORT, htons(encapsport));
	addattr16(n, 1024, IFLA_IPTUN_ENCAP_DPORT, htons(encapdport));

	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 ");

	if (tb[IFLA_IPTUN_ENCAP_TYPE] &&
	    rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_TYPE]) !=
	    TUNNEL_ENCAP_NONE) {
		__u16 type = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_TYPE]);
		__u16 flags = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_FLAGS]);
		__u16 sport = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_SPORT]);
		__u16 dport = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_DPORT]);

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

		if (sport == 0)
			fputs("encap-sport auto ", f);
		else
			fprintf(f, "encap-sport %u", ntohs(sport));

		fprintf(f, "encap-dport %u ", ntohs(dport));

		if (flags & TUNNEL_ENCAP_FLAG_CSUM)
			fputs("encap-csum ", f);
		else
			fputs("noencap-csum ", f);

		if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
			fputs("encap-csum6 ", f);
		else
			fputs("noencap-csum6 ", f);

		if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
			fputs("encap-remcsum ", f);
		else
			fputs("noencap-remcsum ", f);
	}
}

static void 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");
73516e12 TH	40	fprintf(f, " [ noencap ] [ encap { fou \| gue \| none } ]\n");
	41	fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n");
	42	fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
561e650e	43	fprintf(f, "\n");
	44	fprintf(f, "Where: NAME := STRING\n");
	45	fprintf(f, " ADDR := IPV6_ADDRESS\n");
	46	fprintf(f, " ELIM := { none \| 0..255 }(default=%d)\n",
9d0efc10	47	IPV6_DEFAULT_TNL_ENCAP_LIMIT);
561e650e	48	fprintf(f, " HLIM := 0..255 (default=%d)\n",
9d0efc10	49	DEFAULT_TNL_HOP_LIMIT);
561e650e	50	fprintf(f, " TCLASS := { 0x0..0xff \| inherit }\n");
	51	fprintf(f, " FLOWLABEL := { 0x0..0xfffff \| inherit }\n");
	52	}
	53
	54	static void usage(void) __attribute__((noreturn));
	55	static void usage(void)
	56	{
	57	print_usage(stderr);
9d0efc10 ND	58	exit(-1);
	59	}
	60
	61	static int ip6tunnel_parse_opt(struct link_util lu, int argc, char *argv,
	62	struct nlmsghdr *n)
	63	{
d17b136f	64	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
9d0efc10 ND	65	struct {
	66	struct nlmsghdr n;
	67	struct ifinfomsg i;
	68	char buf[2048];
d17b136f PS	69	} req = {
	70	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	71	.n.nlmsg_flags = NLM_F_REQUEST,
	72	.n.nlmsg_type = RTM_GETLINK,
	73	.i.ifi_family = preferred_family,
	74	.i.ifi_index = ifi->ifi_index,
	75	};
9d0efc10 ND	76	struct rtattr *tb[IFLA_MAX + 1];
	77	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	78	struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
	79	int len;
d17b136f PS	80	struct in6_addr laddr = {};
d17b136f PS	81	struct in6_addr raddr = {};
9d0efc10 ND	82	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
	83	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	84	__u32 flowinfo = 0;
	85	__u32 flags = 0;
	86	__u32 link = 0;
	87	__u8 proto = 0;
73516e12 TH	88	__u16 encaptype = 0;
	89	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	90	__u16 encapsport = 0;
	91	__u16 encapdport = 0;
9d0efc10	92
9d0efc10	93	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
c079e121	94	if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
9d0efc10 ND	95	get_failed:
	96	fprintf(stderr,
	97	"Failed to get existing tunnel info.\n");
	98	return -1;
	99	}
	100
	101	len = req.n.nlmsg_len;
	102	len -= NLMSG_LENGTH(sizeof(*ifi));
	103	if (len < 0)
	104	goto get_failed;
	105
	106	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len);
	107
	108	if (!tb[IFLA_LINKINFO])
	109	goto get_failed;
	110
	111	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	112
	113	if (!linkinfo[IFLA_INFO_DATA])
	114	goto get_failed;
	115
	116	parse_rtattr_nested(iptuninfo, IFLA_IPTUN_MAX,
	117	linkinfo[IFLA_INFO_DATA]);
	118
	119	if (iptuninfo[IFLA_IPTUN_LOCAL])
	120	memcpy(&laddr, RTA_DATA(iptuninfo[IFLA_IPTUN_LOCAL]),
	121	sizeof(laddr));
	122
	123	if (iptuninfo[IFLA_IPTUN_REMOTE])
	124	memcpy(&raddr, RTA_DATA(iptuninfo[IFLA_IPTUN_REMOTE]),
	125	sizeof(raddr));
	126
	127	if (iptuninfo[IFLA_IPTUN_TTL])
	128	hop_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]);
	129
	130	if (iptuninfo[IFLA_IPTUN_ENCAP_LIMIT])
	131	encap_limit = rta_getattr_u8(iptuninfo[IFLA_IPTUN_ENCAP_LIMIT]);
	132
	133	if (iptuninfo[IFLA_IPTUN_FLOWINFO])
	134	flowinfo = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLOWINFO]);
	135
	136	if (iptuninfo[IFLA_IPTUN_FLAGS])
	137	flags = rta_getattr_u32(iptuninfo[IFLA_IPTUN_FLAGS]);
	138
	139	if (iptuninfo[IFLA_IPTUN_LINK])
	140	link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]);
	141
	142	if (iptuninfo[IFLA_IPTUN_PROTO])
	143	proto = rta_getattr_u8(iptuninfo[IFLA_IPTUN_PROTO]);
	144	}
	145
	146	while (argc > 0) {
	147	if (matches(*argv, "mode") == 0) {
	148	NEXT_ARG();
	149	if (strcmp(*argv, "ipv6/ipv6") == 0 \|\|
	150	strcmp(*argv, "ip6ip6") == 0)
	151	proto = IPPROTO_IPV6;
	152	else if (strcmp(*argv, "ip/ipv6") == 0 \|\|
	153	strcmp(*argv, "ipv4/ipv6") == 0 \|\|
	154	strcmp(*argv, "ipip6") == 0 \|\|
	155	strcmp(*argv, "ip4ip6") == 0)
	156	proto = IPPROTO_IPIP;
	157	else if (strcmp(*argv, "any/ipv6") == 0 \|\|
	158	strcmp(*argv, "any") == 0)
159	proto = 0;
160	else
161	invarg("Cannot guess tunnel mode.", *argv);
162	} else if (strcmp(*argv, "remote") == 0) {
163	inet_prefix addr;
56f5daac	164
9d0efc10 ND	165	NEXT_ARG();
	166	get_prefix(&addr, *argv, preferred_family);
	167	if (addr.family == AF_UNSPEC)
	168	invarg("\"remote\" address family is AF_UNSPEC", *argv);
	169	memcpy(&raddr, addr.data, addr.bytelen);
	170	} else if (strcmp(*argv, "local") == 0) {
	171	inet_prefix addr;
56f5daac	172
9d0efc10 ND	173	NEXT_ARG();
	174	get_prefix(&addr, *argv, preferred_family);
	175	if (addr.family == AF_UNSPEC)
	176	invarg("\"local\" address family is AF_UNSPEC", *argv);
	177	memcpy(&laddr, addr.data, addr.bytelen);
	178	} else if (matches(*argv, "dev") == 0) {
	179	NEXT_ARG();
	180	link = if_nametoindex(*argv);
	181	if (link == 0)
	182	invarg("\"dev\" is invalid", *argv);
	183	} else if (strcmp(*argv, "hoplimit") == 0 \|\|
	184	strcmp(*argv, "ttl") == 0 \|\|
	185	strcmp(*argv, "hlim") == 0) {
	186	__u8 uval;
56f5daac	187
9d0efc10 ND	188	NEXT_ARG();
	189	if (get_u8(&uval, *argv, 0))
	190	invarg("invalid HLIM", *argv);
	191	hop_limit = uval;
73516e12	192	} else if (strcmp(*argv, "encaplimit") == 0) {
9d0efc10 ND	193	NEXT_ARG();
	194	if (strcmp(*argv, "none") == 0) {
	195	flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
	196	} else {
	197	__u8 uval;
56f5daac	198
9d0efc10 ND	199	if (get_u8(&uval, *argv, 0) < -1)
	200	invarg("invalid ELIM", *argv);
	201	encap_limit = uval;
	202	flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
	203	}
	204	} else if (strcmp(*argv, "tclass") == 0 \|\|
	205	strcmp(*argv, "tc") == 0 \|\|
	206	strcmp(*argv, "tos") == 0 \|\|
	207	matches(*argv, "dsfield") == 0) {
	208	__u8 uval;
56f5daac	209
9d0efc10 ND	210	NEXT_ARG();
	211	flowinfo &= ~IP6_FLOWINFO_TCLASS;
	212	if (strcmp(*argv, "inherit") == 0)
	213	flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	214	else {
	215	if (get_u8(&uval, *argv, 16))
	216	invarg("invalid TClass", *argv);
	217	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	218	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	219	}
	220	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	221	strcmp(*argv, "fl") == 0) {
	222	__u32 uval;
56f5daac	223
9d0efc10 ND	224	NEXT_ARG();
	225	flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
	226	if (strcmp(*argv, "inherit") == 0)
	227	flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	228	else {
	229	if (get_u32(&uval, *argv, 16))
	230	invarg("invalid Flowlabel", *argv);
	231	if (uval > 0xFFFFF)
	232	invarg("invalid Flowlabel", *argv);
	233	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	234	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	235	}
	236	} else if (strcmp(*argv, "dscp") == 0) {
	237	NEXT_ARG();
	238	if (strcmp(*argv, "inherit") != 0)
	239	invarg("not inherit", *argv);
	240	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
	241	} else if (strcmp(*argv, "fwmark") == 0) {
	242	NEXT_ARG();
	243	if (strcmp(*argv, "inherit") != 0)
	244	invarg("not inherit", *argv);
	245	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
73516e12 TH	246	} else if (strcmp(*argv, "noencap") == 0) {
	247	encaptype = TUNNEL_ENCAP_NONE;
	248	} else if (strcmp(*argv, "encap") == 0) {
	249	NEXT_ARG();
	250	if (strcmp(*argv, "fou") == 0)
	251	encaptype = TUNNEL_ENCAP_FOU;
	252	else if (strcmp(*argv, "gue") == 0)
	253	encaptype = TUNNEL_ENCAP_GUE;
	254	else if (strcmp(*argv, "none") == 0)
	255	encaptype = TUNNEL_ENCAP_NONE;
	256	else
	257	invarg("Invalid encap type.", *argv);
	258	} else if (strcmp(*argv, "encap-sport") == 0) {
	259	NEXT_ARG();
	260	if (strcmp(*argv, "auto") == 0)
	261	encapsport = 0;
	262	else if (get_u16(&encapsport, *argv, 0))
	263	invarg("Invalid source port.", *argv);
	264	} else if (strcmp(*argv, "encap-dport") == 0) {
	265	NEXT_ARG();
	266	if (get_u16(&encapdport, *argv, 0))
	267	invarg("Invalid destination port.", *argv);
	268	} else if (strcmp(*argv, "encap-csum") == 0) {
	269	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	270	} else if (strcmp(*argv, "noencap-csum") == 0) {
	271	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	272	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	273	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	274	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	275	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
	276	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	277	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	278	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	279	encapflags \|= ~TUNNEL_ENCAP_FLAG_REMCSUM;
9d0efc10 ND	280	} else
	281	usage();
	282	argc--, argv++;
	283	}
	284
	285	addattr8(n, 1024, IFLA_IPTUN_PROTO, proto);
	286	addattr_l(n, 1024, IFLA_IPTUN_LOCAL, &laddr, sizeof(laddr));
	287	addattr_l(n, 1024, IFLA_IPTUN_REMOTE, &raddr, sizeof(raddr));
	288	addattr8(n, 1024, IFLA_IPTUN_TTL, hop_limit);
	289	addattr8(n, 1024, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
	290	addattr32(n, 1024, IFLA_IPTUN_FLOWINFO, flowinfo);
	291	addattr32(n, 1024, IFLA_IPTUN_FLAGS, flags);
	292	addattr32(n, 1024, IFLA_IPTUN_LINK, link);
	293
73516e12 TH	294	addattr16(n, 1024, IFLA_IPTUN_ENCAP_TYPE, encaptype);
	295	addattr16(n, 1024, IFLA_IPTUN_ENCAP_FLAGS, encapflags);
	296	addattr16(n, 1024, IFLA_IPTUN_ENCAP_SPORT, htons(encapsport));
	297	addattr16(n, 1024, IFLA_IPTUN_ENCAP_DPORT, htons(encapdport));
	298
9d0efc10 ND	299	return 0;
	300	}
	301
	302	static void ip6tunnel_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	303	{
9d0efc10 ND	304	char s2[64];
	305	int flags = 0;
	306	__u32 flowinfo = 0;
	307
	308	if (!tb)
	309	return;
	310
	311	if (tb[IFLA_IPTUN_FLAGS])
	312	flags = rta_getattr_u32(tb[IFLA_IPTUN_FLAGS]);
	313
	314	if (tb[IFLA_IPTUN_FLOWINFO])
	315	flowinfo = rta_getattr_u32(tb[IFLA_IPTUN_FLOWINFO]);
	316
	317	if (tb[IFLA_IPTUN_PROTO]) {
	318	switch (rta_getattr_u8(tb[IFLA_IPTUN_PROTO])) {
	319	case IPPROTO_IPIP:
	320	fprintf(f, "ipip6 ");
	321	break;
	322	case IPPROTO_IPV6:
	323	fprintf(f, "ip6ip6 ");
	324	break;
	325	case 0:
	326	fprintf(f, "any ");
	327	break;
	328	}
	329	}
	330
	331	if (tb[IFLA_IPTUN_REMOTE]) {
	332	fprintf(f, "remote %s ",
7faf1588	333	rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_REMOTE]));
9d0efc10 ND	334	}
	335
	336	if (tb[IFLA_IPTUN_LOCAL]) {
	337	fprintf(f, "local %s ",
7faf1588	338	rt_addr_n2a_rta(AF_INET6, tb[IFLA_IPTUN_LOCAL]));
9d0efc10 ND	339	}
	340
	341	if (tb[IFLA_IPTUN_LINK] && rta_getattr_u32(tb[IFLA_IPTUN_LINK])) {
56f5daac	342	unsigned int link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
9d0efc10 ND	343	const char *n = if_indextoname(link, s2);
	344
	345	if (n)
	346	fprintf(f, "dev %s ", n);
	347	else
	348	fprintf(f, "dev %u ", link);
	349	}
	350
	351	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
	352	printf("encaplimit none ");
	353	else if (tb[IFLA_IPTUN_ENCAP_LIMIT])
	354	fprintf(f, "encaplimit %u ",
	355	rta_getattr_u8(tb[IFLA_IPTUN_ENCAP_LIMIT]));
	356
	357	if (tb[IFLA_IPTUN_TTL])
	358	fprintf(f, "hoplimit %u ", rta_getattr_u8(tb[IFLA_IPTUN_TTL]));
	359
	360	if (flags & IP6_TNL_F_USE_ORIG_TCLASS)
	361	printf("tclass inherit ");
	362	else if (tb[IFLA_IPTUN_FLOWINFO]) {
	363	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS);
	364
	365	printf("tclass 0x%02x ", (__u8)(val >> 20));
	366	}
	367
	368	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
	369	printf("flowlabel inherit ");
	370	else
	371	printf("flowlabel 0x%05x ", ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
	372
	373	printf("(flowinfo 0x%08x) ", ntohl(flowinfo));
	374
	375	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
	376	printf("dscp inherit ");
	377
	378	if (flags & IP6_TNL_F_MIP6_DEV)
	379	fprintf(f, "mip6 ");
	380
	381	if (flags & IP6_TNL_F_USE_ORIG_FWMARK)
	382	fprintf(f, "fwmark inherit ");
73516e12 TH	383
	384	if (tb[IFLA_IPTUN_ENCAP_TYPE] &&
	385	rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_TYPE]) !=
	386	TUNNEL_ENCAP_NONE) {
	387	__u16 type = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_TYPE]);
	388	__u16 flags = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_FLAGS]);
	389	__u16 sport = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_SPORT]);
	390	__u16 dport = rta_getattr_u16(tb[IFLA_IPTUN_ENCAP_DPORT]);
	391
	392	fputs("encap ", f);
	393	switch (type) {
	394	case TUNNEL_ENCAP_FOU:
	395	fputs("fou ", f);
	396	break;
	397	case TUNNEL_ENCAP_GUE:
	398	fputs("gue ", f);
	399	break;
	400	default:
	401	fputs("unknown ", f);
	402	break;
	403	}
	404
	405	if (sport == 0)
	406	fputs("encap-sport auto ", f);
	407	else
	408	fprintf(f, "encap-sport %u", ntohs(sport));
	409
	410	fprintf(f, "encap-dport %u ", ntohs(dport));
	411
	412	if (flags & TUNNEL_ENCAP_FLAG_CSUM)
	413	fputs("encap-csum ", f);
	414	else
	415	fputs("noencap-csum ", f);
	416
	417	if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
	418	fputs("encap-csum6 ", f);
	419	else
	420	fputs("noencap-csum6 ", f);
	421
	422	if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
	423	fputs("encap-remcsum ", f);
	424	else
	425	fputs("noencap-remcsum ", f);
	426	}
9d0efc10 ND	427	}
9d0efc10 ND	428
561e650e	429	static void ip6tunnel_print_help(struct link_util lu, int argc, char *argv,
	430	FILE *f)
	431	{
	432	print_usage(f);
	433	}
	434
9d0efc10 ND	435	struct link_util ip6tnl_link_util = {
	436	.id = "ip6tnl",
	437	.maxattr = IFLA_IPTUN_MAX,
	438	.parse_opt = ip6tunnel_parse_opt,
	439	.print_opt = ip6tunnel_print_opt,
561e650e	440	.print_help = ip6tunnel_print_help,
9d0efc10	441	};