[mirror_iproute2.git] / ip / link_gre6.c

/*
 * link_gre6.c	gre 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:	Dmitry Kozlov <xeb@mail.ru>
 *
 */

#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: ... { ip6gre | ip6gretap } [ remote ADDR ]\n"
		"                                  [ local ADDR ]\n"
		"                                  [ [i|o]seq ]\n"
		"                                  [ [i|o]key KEY ]\n"
		"                                  [ [i|o]csum ]\n"
		"                                  [ hoplimit TTL ]\n"
		"                                  [ encaplimit ELIM ]\n"
		"                                  [ tclass TCLASS ]\n"
		"                                  [ flowlabel FLOWLABEL ]\n"
		"                                  [ dscp inherit ]\n"
		"                                  [ fwmark MARK ]\n"
		"                                  [ dev PHYS_DEV ]\n"
		"                                  [ noencap ]\n"
		"                                  [ encap { fou | gue | none } ]\n"
		"                                  [ encap-sport PORT ]\n"
		"                                  [ encap-dport PORT ]\n"
		"                                  [ [no]encap-csum ]\n"
		"                                  [ [no]encap-csum6 ]\n"
		"                                  [ [no]encap-remcsum ]\n"
		"\n"
		"Where: ADDR      := IPV6_ADDRESS\n"
		"       TTL       := { 0..255 } (default=%d)\n"
		"       KEY       := { DOTTED_QUAD | NUMBER }\n"
		"       ELIM      := { none | 0..255 }(default=%d)\n"
		"       TCLASS    := { 0x0..0xff | inherit }\n"
		"       FLOWLABEL := { 0x0..0xfffff | inherit }\n"
		"       MARK      := { 0x0..0xffffffff | inherit }\n",
		DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
	);
}

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

static int gre_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[1024];
	} 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 *greinfo[IFLA_GRE_MAX + 1];
	__u16 iflags = 0;
	__u16 oflags = 0;
	unsigned int ikey = 0;
	unsigned int okey = 0;
	struct in6_addr raddr = IN6ADDR_ANY_INIT;
	struct in6_addr laddr = IN6ADDR_ANY_INIT;
	unsigned int link = 0;
	unsigned int flowinfo = 0;
	unsigned int flags = 0;
	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	__u16 encaptype = 0;
	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	__u16 encapsport = 0;
	__u16 encapdport = 0;
	int len;
	__u32 fwmark = 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(greinfo, IFLA_GRE_MAX,
				    linkinfo[IFLA_INFO_DATA]);

		if (greinfo[IFLA_GRE_IKEY])
			ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);

		if (greinfo[IFLA_GRE_OKEY])
			okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);

		if (greinfo[IFLA_GRE_IFLAGS])
			iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);

		if (greinfo[IFLA_GRE_OFLAGS])
			oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);

		if (greinfo[IFLA_GRE_LOCAL])
			memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr));

		if (greinfo[IFLA_GRE_REMOTE])
			memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr));

		if (greinfo[IFLA_GRE_TTL])
			hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);

		if (greinfo[IFLA_GRE_LINK])
			link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);

		if (greinfo[IFLA_GRE_ENCAP_LIMIT])
			encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);

		if (greinfo[IFLA_GRE_FLOWINFO])
			flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);

		if (greinfo[IFLA_GRE_FLAGS])
			flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);

		if (greinfo[IFLA_GRE_ENCAP_TYPE])
			encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);

		if (greinfo[IFLA_GRE_ENCAP_FLAGS])
			encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);

		if (greinfo[IFLA_GRE_ENCAP_SPORT])
			encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);

		if (greinfo[IFLA_GRE_ENCAP_DPORT])
			encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);

		if (greinfo[IFLA_GRE_FWMARK])
			fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
	}

	while (argc > 0) {
		if (!matches(*argv, "key")) {
			unsigned int uval;

			NEXT_ARG();
			iflags |= GRE_KEY;
			oflags |= GRE_KEY;
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr,
						"Invalid value for \"key\"\n");
					exit(-1);
				}
				uval = htonl(uval);
			}

			ikey = okey = uval;
		} else if (!matches(*argv, "ikey")) {
			unsigned int uval;

			NEXT_ARG();
			iflags |= GRE_KEY;
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr, "invalid value of \"ikey\"\n");
					exit(-1);
				}
				uval = htonl(uval);
			}
			ikey = uval;
		} else if (!matches(*argv, "okey")) {
			unsigned int uval;

			NEXT_ARG();
			oflags |= GRE_KEY;
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr, "invalid value of \"okey\"\n");
					exit(-1);
				}
				uval = htonl(uval);
			}
			okey = uval;
		} else if (!matches(*argv, "seq")) {
			iflags |= GRE_SEQ;
			oflags |= GRE_SEQ;
		} else if (!matches(*argv, "iseq")) {
			iflags |= GRE_SEQ;
		} else if (!matches(*argv, "oseq")) {
			oflags |= GRE_SEQ;
		} else if (!matches(*argv, "csum")) {
			iflags |= GRE_CSUM;
			oflags |= GRE_CSUM;
		} else if (!matches(*argv, "icsum")) {
			iflags |= GRE_CSUM;
		} else if (!matches(*argv, "ocsum")) {
			oflags |= GRE_CSUM;
		} else if (!matches(*argv, "remote")) {
			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, sizeof(raddr));
		} else if (!matches(*argv, "local")) {
			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, sizeof(laddr));
		} else if (!matches(*argv, "dev")) {
			NEXT_ARG();
			link = if_nametoindex(*argv);
			if (link == 0) {
				fprintf(stderr, "Cannot find device \"%s\"\n",
					*argv);
				exit(-1);
			}
		} else if (!matches(*argv, "ttl") ||
			   !matches(*argv, "hoplimit")) {
			__u8 uval;

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

			NEXT_ARG();
			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();
			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, "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 if (strcmp(*argv, "fwmark") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") == 0) {
				flags |= IP6_TNL_F_USE_ORIG_FWMARK;
				fwmark = 0;
			} else {
				if (get_u32(&fwmark, *argv, 0))
					invarg("invalid fwmark\n", *argv);
				flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
			}
		} 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
			usage();
		argc--; argv++;
	}

	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr));
	addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr));
	if (link)
		addattr32(n, 1024, IFLA_GRE_LINK, link);
	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);

	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));

	return 0;
}

static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	char s2[64];
	const char *local = "any";
	const char *remote = "any";
	unsigned int iflags = 0;
	unsigned int oflags = 0;
	unsigned int flags = 0;
	unsigned int flowinfo = 0;
	struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;

	if (!tb)
		return;

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

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

	if (tb[IFLA_GRE_REMOTE]) {
		struct in6_addr addr;

		memcpy(&addr, RTA_DATA(tb[IFLA_GRE_REMOTE]), sizeof(addr));

		if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
			remote = format_host(AF_INET6, sizeof(addr), &addr);
	}

	print_string(PRINT_ANY, "remote", "remote %s ", remote);

	if (tb[IFLA_GRE_LOCAL]) {
		struct in6_addr addr;

		memcpy(&addr, RTA_DATA(tb[IFLA_GRE_LOCAL]), sizeof(addr));

		if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
			local = format_host(AF_INET6, sizeof(addr), &addr);
	}

	print_string(PRINT_ANY, "local", "local %s ", local);

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

		if (n)
			print_string(PRINT_ANY, "link", "dev %s ", n);
		else
			print_uint(PRINT_ANY, "link_index", "dev %u ", link);
	}

	if (tb[IFLA_GRE_TTL]) {
		__u8 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);

		if (ttl)
			print_int(PRINT_ANY, "ttl", "hoplimit %d ", ttl);
		else
			print_int(PRINT_JSON, "ttl", NULL, ttl);
	}

	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_ign_encap_limit",
			   "encaplimit none ",
			   true);
	else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
		int encap_limit = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);

		print_int(PRINT_ANY,
			  "encap_limit",
			  "encaplimit %d ",
			  encap_limit);
	}

	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_flowlabel",
			   "flowlabel inherit ",
			   true);
	} else {
		if (is_json_context()) {
			SPRINT_BUF(b1);

			snprintf(b1, sizeof(b1), "0x%05x",
				 ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
			print_string(PRINT_JSON, "flowlabel", NULL, b1);

		} else {
			fprintf(f, "flowlabel 0x%05x ",
				ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
		}
	}

	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_rcv_dscp_copy",
			   "dscp inherit ",
			   true);

	if (tb[IFLA_GRE_IFLAGS])
		iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);

	if (tb[IFLA_GRE_OFLAGS])
		oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);

	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
		inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
		print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
	}

	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
		inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
		print_string(PRINT_ANY, "okey", "okey %s ", s2);
	}

	if (iflags & GRE_SEQ)
		print_bool(PRINT_ANY, "iseq", "iseq ", true);
	if (oflags & GRE_SEQ)
		print_bool(PRINT_ANY, "oseq", "oseq ", true);
	if (iflags & GRE_CSUM)
		print_bool(PRINT_ANY, "icsum", "icsum ", true);
	if (oflags & GRE_CSUM)
		print_bool(PRINT_ANY, "ocsum", "ocsum ", true);

	if (flags & IP6_TNL_F_USE_ORIG_FWMARK)
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_fwmark",
			   "fwmark inherit ",
			   true);
	else if (tb[IFLA_GRE_FWMARK]) {
		__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);

		if (fwmark) {
			snprintf(s2, sizeof(s2), "0x%x", fwmark);

			print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
		}
	}

	if (tb[IFLA_GRE_ENCAP_TYPE] &&
	    rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
		__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
		__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
		__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
		__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);

		open_json_object("encap");

		print_string(PRINT_FP, NULL, "encap ", NULL);
		switch (type) {
		case TUNNEL_ENCAP_FOU:
			print_string(PRINT_ANY, "type", "%s ", "fou");
			break;
		case TUNNEL_ENCAP_GUE:
			print_string(PRINT_ANY, "type", "%s ", "gue");
			break;
		default:
			print_null(PRINT_ANY, "type", "unknown ", NULL);
			break;
		}

		if (is_json_context()) {
			print_uint(PRINT_JSON,
				   "sport",
				   NULL,
				   sport ? ntohs(sport) : 0);
			print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));
			print_bool(PRINT_JSON, "csum", NULL,
					   flags & TUNNEL_ENCAP_FLAG_CSUM);
			print_bool(PRINT_JSON, "csum6", NULL,
					   flags & TUNNEL_ENCAP_FLAG_CSUM6);
			print_bool(PRINT_JSON, "remcsum", NULL,
					   flags & TUNNEL_ENCAP_FLAG_REMCSUM);
			close_json_object();
		} else {
			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 gre_print_help(struct link_util *lu, int argc, char **argv,
	FILE *f)
{
	print_usage(f);
}

struct link_util ip6gre_link_util = {
	.id = "ip6gre",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};

struct link_util ip6gretap_link_util = {
	.id = "ip6gretap",
	.maxattr = IFLA_GRE_MAX,
	.parse_opt = gre_parse_opt,
	.print_opt = gre_print_opt,
	.print_help = gre_print_help,
};
Commit	Line	Data
af89576d	1	/*
	2	* link_gre6.c gre 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: Dmitry Kozlov <xeb@mail.ru>
	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
	23	#include "rt_names.h"
	24	#include "utils.h"
	25	#include "ip_common.h"
	26	#include "tunnel.h"
	27
	28	#define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
	29	#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF)
	30
	31	#define DEFAULT_TNL_HOP_LIMIT (64)
	32
561e650e	33	static void print_usage(FILE *f)
af89576d	34	{
8b471354 PS	35	fprintf(f,
	36	"Usage: ... { ip6gre \| ip6gretap } [ remote ADDR ]\n"
	37	" [ local ADDR ]\n"
	38	" [ [i\|o]seq ]\n"
	39	" [ [i\|o]key KEY ]\n"
	40	" [ [i\|o]csum ]\n"
	41	" [ hoplimit TTL ]\n"
	42	" [ encaplimit ELIM ]\n"
	43	" [ tclass TCLASS ]\n"
	44	" [ flowlabel FLOWLABEL ]\n"
	45	" [ dscp inherit ]\n"
ad4b1425	46	" [ fwmark MARK ]\n"
8b471354 PS	47	" [ dev PHYS_DEV ]\n"
	48	" [ noencap ]\n"
	49	" [ encap { fou \| gue \| none } ]\n"
	50	" [ encap-sport PORT ]\n"
	51	" [ encap-dport PORT ]\n"
	52	" [ [no]encap-csum ]\n"
	53	" [ [no]encap-csum6 ]\n"
	54	" [ [no]encap-remcsum ]\n"
	55	"\n"
	56	"Where: ADDR := IPV6_ADDRESS\n"
	57	" TTL := { 0..255 } (default=%d)\n"
	58	" KEY := { DOTTED_QUAD \| NUMBER }\n"
	59	" ELIM := { none \| 0..255 }(default=%d)\n"
	60	" TCLASS := { 0x0..0xff \| inherit }\n"
ad4b1425 CG	61	" FLOWLABEL := { 0x0..0xfffff \| inherit }\n"
ad4b1425 CG	62	" MARK := { 0x0..0xffffffff \| inherit }\n",
8b471354 PS	63	DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
8b471354 PS	64	);
561e650e	65	}
	66
	67	static void usage(void) __attribute__((noreturn));
	68	static void usage(void)
	69	{
	70	print_usage(stderr);
af89576d	71	exit(-1);
	72	}
	73
	74	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	75	struct nlmsghdr *n)
	76	{
d17b136f	77	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
af89576d	78	struct {
	79	struct nlmsghdr n;
	80	struct ifinfomsg i;
	81	char buf[1024];
d17b136f PS	82	} req = {
	83	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	84	.n.nlmsg_flags = NLM_F_REQUEST,
	85	.n.nlmsg_type = RTM_GETLINK,
	86	.i.ifi_family = preferred_family,
	87	.i.ifi_index = ifi->ifi_index,
	88	};
af89576d	89	struct rtattr *tb[IFLA_MAX + 1];
	90	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	91	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
	92	__u16 iflags = 0;
	93	__u16 oflags = 0;
56f5daac SH	94	unsigned int ikey = 0;
56f5daac SH	95	unsigned int okey = 0;
af89576d	96	struct in6_addr raddr = IN6ADDR_ANY_INIT;
af89576d	97	struct in6_addr laddr = IN6ADDR_ANY_INIT;
56f5daac SH	98	unsigned int link = 0;
	99	unsigned int flowinfo = 0;
	100	unsigned int flags = 0;
af89576d	101	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
af89576d	102	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
0b2fbb73 TH	103	__u16 encaptype = 0;
	104	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	105	__u16 encapsport = 0;
	106	__u16 encapdport = 0;
af89576d	107	int len;
ad4b1425	108	__u32 fwmark = 0;
af89576d	109
af89576d	110	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
c079e121	111	if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
af89576d	112	get_failed:
	113	fprintf(stderr,
	114	"Failed to get existing tunnel info.\n");
	115	return -1;
	116	}
	117
	118	len = req.n.nlmsg_len;
	119	len -= NLMSG_LENGTH(sizeof(*ifi));
	120	if (len < 0)
	121	goto get_failed;
	122
	123	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len);
	124
	125	if (!tb[IFLA_LINKINFO])
	126	goto get_failed;
	127
	128	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	129
	130	if (!linkinfo[IFLA_INFO_DATA])
	131	goto get_failed;
	132
	133	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	134	linkinfo[IFLA_INFO_DATA]);
	135
	136	if (greinfo[IFLA_GRE_IKEY])
	137	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
	138
	139	if (greinfo[IFLA_GRE_OKEY])
	140	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
	141
	142	if (greinfo[IFLA_GRE_IFLAGS])
	143	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
	144
	145	if (greinfo[IFLA_GRE_OFLAGS])
	146	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
	147
	148	if (greinfo[IFLA_GRE_LOCAL])
	149	memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr));
	150
	151	if (greinfo[IFLA_GRE_REMOTE])
	152	memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr));
	153
	154	if (greinfo[IFLA_GRE_TTL])
	155	hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	156
	157	if (greinfo[IFLA_GRE_LINK])
	158	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
	159
	160	if (greinfo[IFLA_GRE_ENCAP_LIMIT])
	161	encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);
	162
	163	if (greinfo[IFLA_GRE_FLOWINFO])
	164	flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);
	165
	166	if (greinfo[IFLA_GRE_FLAGS])
	167	flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);
0b2fbb73 TH	168
	169	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	170	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	171
	172	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	173	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	174
	175	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	176	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	177
	178	if (greinfo[IFLA_GRE_ENCAP_DPORT])
	179	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
ad4b1425 CG	180
	181	if (greinfo[IFLA_GRE_FWMARK])
	182	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
af89576d	183	}
	184
	185	while (argc > 0) {
	186	if (!matches(*argv, "key")) {
56f5daac	187	unsigned int uval;
af89576d	188
	189	NEXT_ARG();
	190	iflags \|= GRE_KEY;
	191	oflags \|= GRE_KEY;
	192	if (strchr(*argv, '.'))
	193	uval = get_addr32(*argv);
	194	else {
	195	if (get_unsigned(&uval, *argv, 0) < 0) {
	196	fprintf(stderr,
	197	"Invalid value for \"key\"\n");
	198	exit(-1);
	199	}
	200	uval = htonl(uval);
	201	}
	202
	203	ikey = okey = uval;
	204	} else if (!matches(*argv, "ikey")) {
56f5daac	205	unsigned int uval;
af89576d	206
	207	NEXT_ARG();
	208	iflags \|= GRE_KEY;
	209	if (strchr(*argv, '.'))
	210	uval = get_addr32(*argv);
	211	else {
56f5daac	212	if (get_unsigned(&uval, *argv, 0) < 0) {
af89576d	213	fprintf(stderr, "invalid value of \"ikey\"\n");
	214	exit(-1);
	215	}
	216	uval = htonl(uval);
	217	}
	218	ikey = uval;
	219	} else if (!matches(*argv, "okey")) {
56f5daac	220	unsigned int uval;
af89576d	221
	222	NEXT_ARG();
	223	oflags \|= GRE_KEY;
	224	if (strchr(*argv, '.'))
	225	uval = get_addr32(*argv);
	226	else {
56f5daac	227	if (get_unsigned(&uval, *argv, 0) < 0) {
af89576d	228	fprintf(stderr, "invalid value of \"okey\"\n");
	229	exit(-1);
	230	}
	231	uval = htonl(uval);
	232	}
	233	okey = uval;
	234	} else if (!matches(*argv, "seq")) {
	235	iflags \|= GRE_SEQ;
	236	oflags \|= GRE_SEQ;
	237	} else if (!matches(*argv, "iseq")) {
	238	iflags \|= GRE_SEQ;
	239	} else if (!matches(*argv, "oseq")) {
	240	oflags \|= GRE_SEQ;
	241	} else if (!matches(*argv, "csum")) {
	242	iflags \|= GRE_CSUM;
	243	oflags \|= GRE_CSUM;
	244	} else if (!matches(*argv, "icsum")) {
	245	iflags \|= GRE_CSUM;
	246	} else if (!matches(*argv, "ocsum")) {
	247	oflags \|= GRE_CSUM;
	248	} else if (!matches(*argv, "remote")) {
	249	inet_prefix addr;
56f5daac	250
af89576d	251	NEXT_ARG();
	252	get_prefix(&addr, *argv, preferred_family);
	253	if (addr.family == AF_UNSPEC)
	254	invarg("\"remote\" address family is AF_UNSPEC", *argv);
	255	memcpy(&raddr, &addr.data, sizeof(raddr));
	256	} else if (!matches(*argv, "local")) {
	257	inet_prefix addr;
56f5daac	258
af89576d	259	NEXT_ARG();
	260	get_prefix(&addr, *argv, preferred_family);
	261	if (addr.family == AF_UNSPEC)
	262	invarg("\"local\" address family is AF_UNSPEC", *argv);
	263	memcpy(&laddr, &addr.data, sizeof(laddr));
	264	} else if (!matches(*argv, "dev")) {
	265	NEXT_ARG();
	266	link = if_nametoindex(*argv);
0cb6bb51 CW	267	if (link == 0) {
	268	fprintf(stderr, "Cannot find device \"%s\"\n",
	269	*argv);
af89576d	270	exit(-1);
0cb6bb51	271	}
af89576d	272	} else if (!matches(*argv, "ttl") \|\|
	273	!matches(*argv, "hoplimit")) {
	274	__u8 uval;
56f5daac	275
af89576d	276	NEXT_ARG();
	277	if (get_u8(&uval, *argv, 0))
	278	invarg("invalid TTL", *argv);
	279	hop_limit = uval;
	280	} else if (!matches(*argv, "tos") \|\|
	281	!matches(*argv, "tclass") \|\|
	282	!matches(*argv, "dsfield")) {
	283	__u8 uval;
56f5daac	284
af89576d	285	NEXT_ARG();
	286	if (strcmp(*argv, "inherit") == 0)
	287	flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	288	else {
	289	if (get_u8(&uval, *argv, 16))
	290	invarg("invalid TClass", *argv);
	291	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	292	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	293	}
	294	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	295	strcmp(*argv, "fl") == 0) {
	296	__u32 uval;
56f5daac	297
af89576d	298	NEXT_ARG();
	299	if (strcmp(*argv, "inherit") == 0)
	300	flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	301	else {
	302	if (get_u32(&uval, *argv, 16))
	303	invarg("invalid Flowlabel", *argv);
	304	if (uval > 0xFFFFF)
	305	invarg("invalid Flowlabel", *argv);
	306	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	307	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	308	}
	309	} else if (strcmp(*argv, "dscp") == 0) {
	310	NEXT_ARG();
	311	if (strcmp(*argv, "inherit") != 0)
	312	invarg("not inherit", *argv);
	313	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
0b2fbb73 TH	314	} else if (strcmp(*argv, "noencap") == 0) {
	315	encaptype = TUNNEL_ENCAP_NONE;
	316	} else if (strcmp(*argv, "encap") == 0) {
	317	NEXT_ARG();
	318	if (strcmp(*argv, "fou") == 0)
	319	encaptype = TUNNEL_ENCAP_FOU;
	320	else if (strcmp(*argv, "gue") == 0)
	321	encaptype = TUNNEL_ENCAP_GUE;
	322	else if (strcmp(*argv, "none") == 0)
	323	encaptype = TUNNEL_ENCAP_NONE;
	324	else
	325	invarg("Invalid encap type.", *argv);
	326	} else if (strcmp(*argv, "encap-sport") == 0) {
	327	NEXT_ARG();
	328	if (strcmp(*argv, "auto") == 0)
	329	encapsport = 0;
	330	else if (get_u16(&encapsport, *argv, 0))
	331	invarg("Invalid source port.", *argv);
	332	} else if (strcmp(*argv, "encap-dport") == 0) {
	333	NEXT_ARG();
	334	if (get_u16(&encapdport, *argv, 0))
	335	invarg("Invalid destination port.", *argv);
	336	} else if (strcmp(*argv, "encap-csum") == 0) {
	337	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	338	} else if (strcmp(*argv, "noencap-csum") == 0) {
	339	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	340	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	341	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	342	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	343	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
	344	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	345	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	346	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	347	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
ad4b1425 CG	348	} else if (strcmp(*argv, "fwmark") == 0) {
	349	NEXT_ARG();
	350	if (strcmp(*argv, "inherit") == 0) {
	351	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
	352	fwmark = 0;
	353	} else {
	354	if (get_u32(&fwmark, *argv, 0))
	355	invarg("invalid fwmark\n", *argv);
	356	flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
	357	}
a11b7b71 ND	358	} else if (strcmp(*argv, "encaplimit") == 0) {
	359	NEXT_ARG();
	360	if (strcmp(*argv, "none") == 0) {
	361	flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
	362	} else {
	363	__u8 uval;
	364
	365	if (get_u8(&uval, *argv, 0) < -1)
	366	invarg("invalid ELIM", *argv);
	367	encap_limit = uval;
	368	flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
	369	}
af89576d	370	} else
	371	usage();
	372	argc--; argv++;
	373	}
	374
	375	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	376	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	377	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	378	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	379	addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr));
	380	addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr));
	381	if (link)
	382	addattr32(n, 1024, IFLA_GRE_LINK, link);
	383	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	384	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	385	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
35893864	386	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
ad4b1425	387	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
af89576d	388
0b2fbb73 TH	389	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	390	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	391	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	392	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	393
af89576d	394	return 0;
	395	}
	396
	397	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	398	{
af89576d	399	char s2[64];
	400	const char *local = "any";
	401	const char *remote = "any";
56f5daac SH	402	unsigned int iflags = 0;
	403	unsigned int oflags = 0;
	404	unsigned int flags = 0;
	405	unsigned int flowinfo = 0;
af89576d	406	struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;
	407
	408	if (!tb)
	409	return;
	410
	411	if (tb[IFLA_GRE_FLAGS])
	412	flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);
	413
	414	if (tb[IFLA_GRE_FLOWINFO])
35893864	415	flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);
af89576d	416
	417	if (tb[IFLA_GRE_REMOTE]) {
	418	struct in6_addr addr;
56f5daac	419
af89576d	420	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_REMOTE]), sizeof(addr));
	421
	422	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	423	remote = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	424	}
af89576d	425
6856fb65	426	print_string(PRINT_ANY, "remote", "remote %s ", remote);
af89576d	427
	428	if (tb[IFLA_GRE_LOCAL]) {
	429	struct in6_addr addr;
56f5daac	430
af89576d	431	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_LOCAL]), sizeof(addr));
	432
	433	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	434	local = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	435	}
af89576d	436
6856fb65	437	print_string(PRINT_ANY, "local", "local %s ", local);
af89576d	438
af89576d	439	if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
56f5daac	440	unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
af89576d	441	const char *n = if_indextoname(link, s2);
	442
	443	if (n)
6856fb65	444	print_string(PRINT_ANY, "link", "dev %s ", n);
af89576d	445	else
6856fb65	446	print_uint(PRINT_ANY, "link_index", "dev %u ", link);
af89576d	447	}
af89576d	448
6856fb65 JF	449	if (tb[IFLA_GRE_TTL]) {
	450	__u8 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	451
	452	if (ttl)
	453	print_int(PRINT_ANY, "ttl", "hoplimit %d ", ttl);
	454	else
	455	print_int(PRINT_JSON, "ttl", NULL, ttl);
	456	}
af89576d	457
af89576d	458	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
6856fb65 JF	459	print_bool(PRINT_ANY,
	460	"ip6_tnl_f_ign_encap_limit",
	461	"encaplimit none ",
	462	true);
af89576d	463	else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
	464	int encap_limit = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);
	465
6856fb65 JF	466	print_int(PRINT_ANY,
	467	"encap_limit",
	468	"encaplimit %d ",
	469	encap_limit);
af89576d	470	}
af89576d	471
6856fb65 JF	472	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
	473	print_bool(PRINT_ANY,
	474	"ip6_tnl_f_use_orig_flowlabel",
	475	"flowlabel inherit ",
	476	true);
	477	} else {
	478	if (is_json_context()) {
	479	SPRINT_BUF(b1);
	480
	481	snprintf(b1, sizeof(b1), "0x%05x",
	482	ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
	483	print_string(PRINT_JSON, "flowlabel", NULL, b1);
	484
	485	} else {
	486	fprintf(f, "flowlabel 0x%05x ",
	487	ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
	488	}
	489	}
af89576d	490
af89576d	491	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
6856fb65 JF	492	print_bool(PRINT_ANY,
	493	"ip6_tnl_f_rcv_dscp_copy",
	494	"dscp inherit ",
	495	true);
af89576d	496
	497	if (tb[IFLA_GRE_IFLAGS])
	498	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
	499
	500	if (tb[IFLA_GRE_OFLAGS])
	501	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
	502
	503	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
	504	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
6856fb65	505	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
af89576d	506	}
	507
	508	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
	509	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
6856fb65	510	print_string(PRINT_ANY, "okey", "okey %s ", s2);
af89576d	511	}
	512
	513	if (iflags & GRE_SEQ)
6856fb65	514	print_bool(PRINT_ANY, "iseq", "iseq ", true);
af89576d	515	if (oflags & GRE_SEQ)
6856fb65	516	print_bool(PRINT_ANY, "oseq", "oseq ", true);
af89576d	517	if (iflags & GRE_CSUM)
6856fb65	518	print_bool(PRINT_ANY, "icsum", "icsum ", true);
af89576d	519	if (oflags & GRE_CSUM)
6856fb65	520	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
0b2fbb73	521
ad4b1425	522	if (flags & IP6_TNL_F_USE_ORIG_FWMARK)
6856fb65 JF	523	print_bool(PRINT_ANY,
	524	"ip6_tnl_f_use_orig_fwmark",
	525	"fwmark inherit ",
	526	true);
	527	else if (tb[IFLA_GRE_FWMARK]) {
	528	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	529
	530	if (fwmark) {
	531	snprintf(s2, sizeof(s2), "0x%x", fwmark);
	532
	533	print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
	534	}
	535	}
ad4b1425	536
0b2fbb73 TH	537	if (tb[IFLA_GRE_ENCAP_TYPE] &&
	538	rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
	539	__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
	540	__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
	541	__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
	542	__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);
	543
6856fb65 JF	544	open_json_object("encap");
	545
	546	print_string(PRINT_FP, NULL, "encap ", NULL);
0b2fbb73 TH	547	switch (type) {
0b2fbb73 TH	548	case TUNNEL_ENCAP_FOU:
6856fb65	549	print_string(PRINT_ANY, "type", "%s ", "fou");
0b2fbb73 TH	550	break;
0b2fbb73 TH	551	case TUNNEL_ENCAP_GUE:
6856fb65	552	print_string(PRINT_ANY, "type", "%s ", "gue");
0b2fbb73 TH	553	break;
0b2fbb73 TH	554	default:
6856fb65	555	print_null(PRINT_ANY, "type", "unknown ", NULL);
0b2fbb73 TH	556	break;
	557	}
	558
6856fb65 JF	559	if (is_json_context()) {
	560	print_uint(PRINT_JSON,
	561	"sport",
	562	NULL,
	563	sport ? ntohs(sport) : 0);
	564	print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));
	565	print_bool(PRINT_JSON, "csum", NULL,
	566	flags & TUNNEL_ENCAP_FLAG_CSUM);
	567	print_bool(PRINT_JSON, "csum6", NULL,
	568	flags & TUNNEL_ENCAP_FLAG_CSUM6);
	569	print_bool(PRINT_JSON, "remcsum", NULL,
	570	flags & TUNNEL_ENCAP_FLAG_REMCSUM);
	571	close_json_object();
	572	} else {
	573	if (sport == 0)
	574	fputs("encap-sport auto ", f);
	575	else
	576	fprintf(f, "encap-sport %u", ntohs(sport));
0b2fbb73	577
6856fb65	578	fprintf(f, "encap-dport %u ", ntohs(dport));
0b2fbb73	579
6856fb65 JF	580	if (flags & TUNNEL_ENCAP_FLAG_CSUM)
	581	fputs("encap-csum ", f);
	582	else
	583	fputs("noencap-csum ", f);
0b2fbb73	584
6856fb65 JF	585	if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
	586	fputs("encap-csum6 ", f);
	587	else
	588	fputs("noencap-csum6 ", f);
0b2fbb73	589
6856fb65 JF	590	if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
	591	fputs("encap-remcsum ", f);
	592	else
	593	fputs("noencap-remcsum ", f);
	594	}
0b2fbb73	595	}
af89576d	596	}
af89576d	597
561e650e	598	static void gre_print_help(struct link_util lu, int argc, char *argv,
	599	FILE *f)
	600	{
	601	print_usage(f);
	602	}
	603
af89576d	604	struct link_util ip6gre_link_util = {
	605	.id = "ip6gre",
	606	.maxattr = IFLA_GRE_MAX,
	607	.parse_opt = gre_parse_opt,
	608	.print_opt = gre_print_opt,
561e650e	609	.print_help = gre_print_help,
af89576d	610	};
	611
	612	struct link_util ip6gretap_link_util = {
	613	.id = "ip6gretap",
	614	.maxattr = IFLA_GRE_MAX,
	615	.parse_opt = gre_parse_opt,
	616	.print_opt = gre_print_opt,
561e650e	617	.print_help = gre_print_help,
af89576d	618	};