[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 | ip6erspan} [ 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"
		"                                  [ erspan_ver version ]\n"
		"                                  [ erspan IDX ]\n"
		"                                  [ erspan_dir { ingress | egress } ]\n"
		"                                  [ erspan_hwid hwid ]\n"
		"                                  [ external ]\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;
	} 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 nlmsghdr *answer;
	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;
	__be32 ikey = 0;
	__be32 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;
	__u8 metadata = 0;
	int len;
	__u32 fwmark = 0;
	__u32 erspan_idx = 0;
	__u8 erspan_ver = 0;
	__u8 erspan_dir = 0;
	__u16 erspan_hwid = 0;

	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
		if (rtnl_talk(&rth, &req.n, &answer) < 0) {
get_failed:
			fprintf(stderr,
				"Failed to get existing tunnel info.\n");
			return -1;
		}

		len = answer->nlmsg_len;
		len -= NLMSG_LENGTH(sizeof(*ifi));
		if (len < 0)
			goto get_failed;

		parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), 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_COLLECT_METADATA])
			metadata = 1;

		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]);

		if (greinfo[IFLA_GRE_ERSPAN_INDEX])
			erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);

		if (greinfo[IFLA_GRE_ERSPAN_VER])
			erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);

		if (greinfo[IFLA_GRE_ERSPAN_DIR])
			erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);

		if (greinfo[IFLA_GRE_ERSPAN_HWID])
			erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);

		free(answer);
	}

	while (argc > 0) {
		if (!matches(*argv, "key")) {
			NEXT_ARG();
			iflags |= GRE_KEY;
			oflags |= GRE_KEY;
			ikey = okey = tnl_parse_key("key", *argv);
		} else if (!matches(*argv, "ikey")) {
			NEXT_ARG();
			iflags |= GRE_KEY;
			ikey = tnl_parse_key("ikey", *argv);
		} else if (!matches(*argv, "okey")) {
			NEXT_ARG();
			oflags |= GRE_KEY;
			okey = tnl_parse_key("okey", *argv);
		} 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_addr(&addr, *argv, AF_INET6);
			memcpy(&raddr, &addr.data, sizeof(raddr));
		} else if (!matches(*argv, "local")) {
			inet_prefix addr;

			NEXT_ARG();
			get_addr(&addr, *argv, AF_INET6);
			memcpy(&laddr, &addr.data, sizeof(laddr));
		} else if (!matches(*argv, "dev")) {
			NEXT_ARG();
			link = ll_name_to_index(*argv);
			if (link == 0) {
				fprintf(stderr, "Cannot find device \"%s\"\n",
					*argv);
				exit(-1);
			}
		} else if (!matches(*argv, "ttl") ||
			   !matches(*argv, "hoplimit") ||
			   !matches(*argv, "hlim")) {
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (get_u8(&hop_limit, *argv, 0))
					invarg("invalid HLIM\n", *argv);
			} else
				hop_limit = 0;
		} else if (!matches(*argv, "tos") ||
			   !matches(*argv, "tclass") ||
			   !matches(*argv, "dsfield")) {
			__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, "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, "external") == 0) {
			metadata = 1;
		} 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))
					invarg("invalid ELIM", *argv);
				encap_limit = uval;
				flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
			}
		} else if (strcmp(*argv, "erspan") == 0) {
			NEXT_ARG();
			if (get_u32(&erspan_idx, *argv, 0))
				invarg("invalid erspan index\n", *argv);
			if (erspan_idx & ~((1<<20) - 1) || erspan_idx == 0)
				invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
		} else if (strcmp(*argv, "erspan_ver") == 0) {
			NEXT_ARG();
			if (get_u8(&erspan_ver, *argv, 0))
				invarg("invalid erspan version\n", *argv);
			if (erspan_ver != 1 && erspan_ver != 2)
				invarg("erspan version must be 1 or 2\n", *argv);
		} else if (strcmp(*argv, "erspan_dir") == 0) {
			NEXT_ARG();
			if (matches(*argv, "ingress") == 0)
				erspan_dir = 0;
			else if (matches(*argv, "egress") == 0)
				erspan_dir = 1;
			else
				invarg("Invalid erspan direction.", *argv);
		} else if (strcmp(*argv, "erspan_hwid") == 0) {
			NEXT_ARG();
			if (get_u16(&erspan_hwid, *argv, 0))
				invarg("invalid erspan hwid\n", *argv);
		} else
			usage();
		argc--; argv++;
	}

	if (!metadata) {
		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);
		if (erspan_ver) {
			addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
			if (erspan_ver == 1 && erspan_idx != 0) {
				addattr32(n, 1024,
					  IFLA_GRE_ERSPAN_INDEX, erspan_idx);
			} else if (erspan_ver == 2) {
				addattr8(n, 1024,
					 IFLA_GRE_ERSPAN_DIR, erspan_dir);
				addattr16(n, 1024,
					  IFLA_GRE_ERSPAN_HWID, erspan_hwid);
			}
		}
		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));
	} else {
		addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
	}

	return 0;
}

static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	char s2[64];
	unsigned int iflags = 0;
	unsigned int oflags = 0;
	unsigned int flags = 0;
	__u32 flowinfo = 0;
	__u8 ttl = 0;

	if (!tb)
		return;

	if (tb[IFLA_GRE_COLLECT_METADATA]) {
		print_bool(PRINT_ANY, "external", "external", true);
		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]);

	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET6);
	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET6);

	if (tb[IFLA_GRE_LINK]) {
		unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);

		if (link) {
			print_string(PRINT_ANY, "link", "dev %s ",
				     ll_index_to_name(link));
		}
	}

	if (tb[IFLA_GRE_TTL])
		ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	if (is_json_context() || ttl)
		print_uint(PRINT_ANY, "ttl", "hoplimit %u ", ttl);
	else
		print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit");

	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]) {
		__u8 val = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);

		print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
	}

	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_tclass",
			   "tclass inherit ",
			   true);
	} else if (tb[IFLA_GRE_FLOWINFO]) {
		__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;

		snprintf(s2, sizeof(s2), "0x%02x", val);
		print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
	}

	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_flowlabel",
			   "flowlabel inherit ",
			   true);
	} else if (tb[IFLA_GRE_FLOWINFO]) {
		__u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);

		snprintf(s2, sizeof(s2), "0x%05x", val);
		print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
	}

	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) {
			print_0xhex(PRINT_ANY,
				    "fwmark", "fwmark 0x%x ", fwmark);
		}
	}

	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
		__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
		print_uint(PRINT_ANY,
			   "erspan_index", "erspan_index %u ", erspan_idx);
	}

	if (tb[IFLA_GRE_ERSPAN_VER]) {
		__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);

		print_uint(PRINT_ANY, "erspan_ver", "erspan_ver %u ", erspan_ver);
	}

	if (tb[IFLA_GRE_ERSPAN_DIR]) {
		__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);

		if (erspan_dir == 0)
			print_string(PRINT_ANY, "erspan_dir",
				     "erspan_dir ingress ", NULL);
		else
			print_string(PRINT_ANY, "erspan_dir",
				     "erspan_dir egress ", NULL);
	}

	if (tb[IFLA_GRE_ERSPAN_HWID]) {
		__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);

		print_hex(PRINT_ANY, "erspan_hwid", "erspan_hwid 0x%x ", erspan_hwid);
	}

	tnl_print_encap(tb,
			IFLA_GRE_ENCAP_TYPE,
			IFLA_GRE_ENCAP_FLAGS,
			IFLA_GRE_ENCAP_SPORT,
			IFLA_GRE_ENCAP_DPORT);
}

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,
};

struct link_util ip6erspan_link_util = {
	.id = "ip6erspan",
	.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	35	fprintf(f,
8595cc40	36	"Usage: ... { ip6gre \| ip6gretap \| ip6erspan} [ remote ADDR ]\n"
8b471354 PS	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"
1e4be52b	55	" [ erspan_ver version ]\n"
8595cc40	56	" [ erspan IDX ]\n"
1e4be52b WT	57	" [ erspan_dir { ingress \| egress } ]\n"
	58	" [ erspan_hwid hwid ]\n"
	59	" [ external ]\n"
8b471354 PS	60	"\n"
	61	"Where: ADDR := IPV6_ADDRESS\n"
	62	" TTL := { 0..255 } (default=%d)\n"
	63	" KEY := { DOTTED_QUAD \| NUMBER }\n"
	64	" ELIM := { none \| 0..255 }(default=%d)\n"
	65	" TCLASS := { 0x0..0xff \| inherit }\n"
ad4b1425 CG	66	" FLOWLABEL := { 0x0..0xfffff \| inherit }\n"
ad4b1425 CG	67	" MARK := { 0x0..0xffffffff \| inherit }\n",
8b471354 PS	68	DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
8b471354 PS	69	);
561e650e	70	}
	71
	72	static void usage(void) __attribute__((noreturn));
	73	static void usage(void)
	74	{
	75	print_usage(stderr);
af89576d	76	exit(-1);
	77	}
	78
	79	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	80	struct nlmsghdr *n)
	81	{
d17b136f	82	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
af89576d	83	struct {
	84	struct nlmsghdr n;
	85	struct ifinfomsg i;
d17b136f PS	86	} req = {
	87	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	88	.n.nlmsg_flags = NLM_F_REQUEST,
	89	.n.nlmsg_type = RTM_GETLINK,
	90	.i.ifi_family = preferred_family,
	91	.i.ifi_index = ifi->ifi_index,
	92	};
08ede25f	93	struct nlmsghdr *answer;
af89576d	94	struct rtattr *tb[IFLA_MAX + 1];
	95	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	96	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
	97	__u16 iflags = 0;
	98	__u16 oflags = 0;
1f44b937 SP	99	__be32 ikey = 0;
1f44b937 SP	100	__be32 okey = 0;
af89576d	101	struct in6_addr raddr = IN6ADDR_ANY_INIT;
af89576d	102	struct in6_addr laddr = IN6ADDR_ANY_INIT;
56f5daac SH	103	unsigned int link = 0;
	104	unsigned int flowinfo = 0;
	105	unsigned int flags = 0;
af89576d	106	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
af89576d	107	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
0b2fbb73 TH	108	__u16 encaptype = 0;
	109	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	110	__u16 encapsport = 0;
	111	__u16 encapdport = 0;
6231c5be	112	__u8 metadata = 0;
af89576d	113	int len;
ad4b1425	114	__u32 fwmark = 0;
8595cc40	115	__u32 erspan_idx = 0;
28976362 WT	116	__u8 erspan_ver = 0;
	117	__u8 erspan_dir = 0;
	118	__u16 erspan_hwid = 0;
af89576d	119
af89576d	120	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
86bf43c7	121	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
af89576d	122	get_failed:
	123	fprintf(stderr,
	124	"Failed to get existing tunnel info.\n");
	125	return -1;
	126	}
	127
86bf43c7	128	len = answer->nlmsg_len;
af89576d	129	len -= NLMSG_LENGTH(sizeof(*ifi));
	130	if (len < 0)
	131	goto get_failed;
	132
86bf43c7	133	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
af89576d	134
	135	if (!tb[IFLA_LINKINFO])
	136	goto get_failed;
	137
	138	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	139
	140	if (!linkinfo[IFLA_INFO_DATA])
	141	goto get_failed;
	142
	143	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	144	linkinfo[IFLA_INFO_DATA]);
	145
	146	if (greinfo[IFLA_GRE_IKEY])
	147	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
	148
	149	if (greinfo[IFLA_GRE_OKEY])
	150	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
	151
	152	if (greinfo[IFLA_GRE_IFLAGS])
	153	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
	154
	155	if (greinfo[IFLA_GRE_OFLAGS])
	156	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
	157
	158	if (greinfo[IFLA_GRE_LOCAL])
	159	memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr));
	160
	161	if (greinfo[IFLA_GRE_REMOTE])
	162	memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr));
	163
	164	if (greinfo[IFLA_GRE_TTL])
	165	hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	166
	167	if (greinfo[IFLA_GRE_LINK])
	168	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
	169
	170	if (greinfo[IFLA_GRE_ENCAP_LIMIT])
	171	encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);
	172
	173	if (greinfo[IFLA_GRE_FLOWINFO])
	174	flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);
	175
	176	if (greinfo[IFLA_GRE_FLAGS])
	177	flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);
0b2fbb73 TH	178
	179	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	180	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	181
	182	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	183	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	184
	185	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	186	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	187
6231c5be WT	188	if (greinfo[IFLA_GRE_COLLECT_METADATA])
	189	metadata = 1;
	190
0b2fbb73 TH	191	if (greinfo[IFLA_GRE_ENCAP_DPORT])
0b2fbb73 TH	192	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
ad4b1425 CG	193
	194	if (greinfo[IFLA_GRE_FWMARK])
	195	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
86bf43c7	196
8595cc40 WT	197	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	198	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
	199
28976362 WT	200	if (greinfo[IFLA_GRE_ERSPAN_VER])
	201	erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);
	202
	203	if (greinfo[IFLA_GRE_ERSPAN_DIR])
	204	erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);
	205
	206	if (greinfo[IFLA_GRE_ERSPAN_HWID])
	207	erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);
	208
86bf43c7	209	free(answer);
af89576d	210	}
	211
	212	while (argc > 0) {
	213	if (!matches(*argv, "key")) {
af89576d	214	NEXT_ARG();
	215	iflags \|= GRE_KEY;
	216	oflags \|= GRE_KEY;
1f44b937	217	ikey = okey = tnl_parse_key("key", *argv);
af89576d	218	} else if (!matches(*argv, "ikey")) {
af89576d	219	NEXT_ARG();
af89576d	220	iflags \|= GRE_KEY;
1f44b937	221	ikey = tnl_parse_key("ikey", *argv);
af89576d	222	} else if (!matches(*argv, "okey")) {
af89576d	223	NEXT_ARG();
af89576d	224	oflags \|= GRE_KEY;
1f44b937	225	okey = tnl_parse_key("okey", *argv);
af89576d	226	} else if (!matches(*argv, "seq")) {
	227	iflags \|= GRE_SEQ;
	228	oflags \|= GRE_SEQ;
	229	} else if (!matches(*argv, "iseq")) {
	230	iflags \|= GRE_SEQ;
	231	} else if (!matches(*argv, "oseq")) {
	232	oflags \|= GRE_SEQ;
	233	} else if (!matches(*argv, "csum")) {
	234	iflags \|= GRE_CSUM;
	235	oflags \|= GRE_CSUM;
	236	} else if (!matches(*argv, "icsum")) {
	237	iflags \|= GRE_CSUM;
	238	} else if (!matches(*argv, "ocsum")) {
	239	oflags \|= GRE_CSUM;
	240	} else if (!matches(*argv, "remote")) {
	241	inet_prefix addr;
56f5daac	242
af89576d	243	NEXT_ARG();
9aceaad7	244	get_addr(&addr, *argv, AF_INET6);
af89576d	245	memcpy(&raddr, &addr.data, sizeof(raddr));
	246	} else if (!matches(*argv, "local")) {
	247	inet_prefix addr;
56f5daac	248
af89576d	249	NEXT_ARG();
9aceaad7	250	get_addr(&addr, *argv, AF_INET6);
af89576d	251	memcpy(&laddr, &addr.data, sizeof(laddr));
	252	} else if (!matches(*argv, "dev")) {
	253	NEXT_ARG();
7a14358b	254	link = ll_name_to_index(*argv);
0cb6bb51 CW	255	if (link == 0) {
	256	fprintf(stderr, "Cannot find device \"%s\"\n",
	257	*argv);
af89576d	258	exit(-1);
0cb6bb51	259	}
af89576d	260	} else if (!matches(*argv, "ttl") \|\|
c4743c4d SP	261	!matches(*argv, "hoplimit") \|\|
c4743c4d SP	262	!matches(*argv, "hlim")) {
af89576d	263	NEXT_ARG();
c4743c4d SP	264	if (strcmp(*argv, "inherit") != 0) {
	265	if (get_u8(&hop_limit, *argv, 0))
	266	invarg("invalid HLIM\n", *argv);
	267	} else
	268	hop_limit = 0;
af89576d	269	} else if (!matches(*argv, "tos") \|\|
	270	!matches(*argv, "tclass") \|\|
	271	!matches(*argv, "dsfield")) {
	272	__u8 uval;
56f5daac	273
af89576d	274	NEXT_ARG();
afdf9277	275	flowinfo &= ~IP6_FLOWINFO_TCLASS;
af89576d	276	if (strcmp(*argv, "inherit") == 0)
	277	flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	278	else {
	279	if (get_u8(&uval, *argv, 16))
	280	invarg("invalid TClass", *argv);
	281	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	282	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	283	}
	284	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	285	strcmp(*argv, "fl") == 0) {
	286	__u32 uval;
56f5daac	287
af89576d	288	NEXT_ARG();
afdf9277	289	flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
af89576d	290	if (strcmp(*argv, "inherit") == 0)
	291	flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	292	else {
	293	if (get_u32(&uval, *argv, 16))
	294	invarg("invalid Flowlabel", *argv);
	295	if (uval > 0xFFFFF)
	296	invarg("invalid Flowlabel", *argv);
	297	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	298	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	299	}
	300	} else if (strcmp(*argv, "dscp") == 0) {
	301	NEXT_ARG();
	302	if (strcmp(*argv, "inherit") != 0)
	303	invarg("not inherit", *argv);
	304	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
0b2fbb73 TH	305	} else if (strcmp(*argv, "noencap") == 0) {
	306	encaptype = TUNNEL_ENCAP_NONE;
	307	} else if (strcmp(*argv, "encap") == 0) {
	308	NEXT_ARG();
	309	if (strcmp(*argv, "fou") == 0)
	310	encaptype = TUNNEL_ENCAP_FOU;
	311	else if (strcmp(*argv, "gue") == 0)
	312	encaptype = TUNNEL_ENCAP_GUE;
	313	else if (strcmp(*argv, "none") == 0)
	314	encaptype = TUNNEL_ENCAP_NONE;
	315	else
	316	invarg("Invalid encap type.", *argv);
	317	} else if (strcmp(*argv, "encap-sport") == 0) {
	318	NEXT_ARG();
	319	if (strcmp(*argv, "auto") == 0)
	320	encapsport = 0;
	321	else if (get_u16(&encapsport, *argv, 0))
	322	invarg("Invalid source port.", *argv);
	323	} else if (strcmp(*argv, "encap-dport") == 0) {
	324	NEXT_ARG();
	325	if (get_u16(&encapdport, *argv, 0))
	326	invarg("Invalid destination port.", *argv);
	327	} else if (strcmp(*argv, "encap-csum") == 0) {
	328	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	329	} else if (strcmp(*argv, "noencap-csum") == 0) {
	330	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	331	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	332	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	333	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	334	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
	335	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	336	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	337	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	338	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
6231c5be WT	339	} else if (strcmp(*argv, "external") == 0) {
6231c5be WT	340	metadata = 1;
ad4b1425 CG	341	} else if (strcmp(*argv, "fwmark") == 0) {
	342	NEXT_ARG();
	343	if (strcmp(*argv, "inherit") == 0) {
	344	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
	345	fwmark = 0;
	346	} else {
	347	if (get_u32(&fwmark, *argv, 0))
	348	invarg("invalid fwmark\n", *argv);
	349	flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
	350	}
a11b7b71 ND	351	} else if (strcmp(*argv, "encaplimit") == 0) {
	352	NEXT_ARG();
	353	if (strcmp(*argv, "none") == 0) {
	354	flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
	355	} else {
	356	__u8 uval;
	357
56708ae7	358	if (get_u8(&uval, *argv, 0))
a11b7b71 ND	359	invarg("invalid ELIM", *argv);
	360	encap_limit = uval;
	361	flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
	362	}
8595cc40 WT	363	} else if (strcmp(*argv, "erspan") == 0) {
	364	NEXT_ARG();
	365	if (get_u32(&erspan_idx, *argv, 0))
	366	invarg("invalid erspan index\n", *argv);
	367	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	368	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
28976362 WT	369	} else if (strcmp(*argv, "erspan_ver") == 0) {
	370	NEXT_ARG();
	371	if (get_u8(&erspan_ver, *argv, 0))
	372	invarg("invalid erspan version\n", *argv);
	373	if (erspan_ver != 1 && erspan_ver != 2)
	374	invarg("erspan version must be 1 or 2\n", *argv);
	375	} else if (strcmp(*argv, "erspan_dir") == 0) {
	376	NEXT_ARG();
	377	if (matches(*argv, "ingress") == 0)
	378	erspan_dir = 0;
	379	else if (matches(*argv, "egress") == 0)
	380	erspan_dir = 1;
	381	else
	382	invarg("Invalid erspan direction.", *argv);
	383	} else if (strcmp(*argv, "erspan_hwid") == 0) {
	384	NEXT_ARG();
	385	if (get_u16(&erspan_hwid, *argv, 0))
	386	invarg("invalid erspan hwid\n", *argv);
af89576d	387	} else
	388	usage();
	389	argc--; argv++;
	390	}
	391
6231c5be WT	392	if (!metadata) {
	393	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	394	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	395	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	396	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	397	addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr));
	398	addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr));
	399	if (link)
	400	addattr32(n, 1024, IFLA_GRE_LINK, link);
	401	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	402	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	403	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
	404	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
	405	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
28976362 WT	406	if (erspan_ver) {
	407	addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
	408	if (erspan_ver == 1 && erspan_idx != 0) {
de54cdd3 SP	409	addattr32(n, 1024,
	410	IFLA_GRE_ERSPAN_INDEX, erspan_idx);
	411	} else if (erspan_ver == 2) {
	412	addattr8(n, 1024,
	413	IFLA_GRE_ERSPAN_DIR, erspan_dir);
	414	addattr16(n, 1024,
	415	IFLA_GRE_ERSPAN_HWID, erspan_hwid);
28976362 WT	416	}
28976362 WT	417	}
6231c5be WT	418	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	419	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	420	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	421	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	422	} else {
	423	addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
	424	}
0b2fbb73	425
af89576d	426	return 0;
	427	}
	428
	429	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	430	{
af89576d	431	char s2[64];
56f5daac SH	432	unsigned int iflags = 0;
	433	unsigned int oflags = 0;
	434	unsigned int flags = 0;
090524f8	435	__u32 flowinfo = 0;
375560c4	436	__u8 ttl = 0;
af89576d	437
	438	if (!tb)
	439	return;
	440
6231c5be	441	if (tb[IFLA_GRE_COLLECT_METADATA]) {
00ff4b8e	442	print_bool(PRINT_ANY, "external", "external", true);
6231c5be WT	443	return;
	444	}
	445
af89576d	446	if (tb[IFLA_GRE_FLAGS])
	447	flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);
	448
	449	if (tb[IFLA_GRE_FLOWINFO])
35893864	450	flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);
af89576d	451
b761fc41 SP	452	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET6);
b761fc41 SP	453	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET6);
af89576d	454
45d3a6ef	455	if (tb[IFLA_GRE_LINK]) {
56f5daac	456	unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
af89576d	457
45d3a6ef SP	458	if (link) {
	459	print_string(PRINT_ANY, "link", "dev %s ",
	460	ll_index_to_name(link));
	461	}
af89576d	462	}
af89576d	463
375560c4 SP	464	if (tb[IFLA_GRE_TTL])
	465	ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	466	if (is_json_context() \|\| ttl)
	467	print_uint(PRINT_ANY, "ttl", "hoplimit %u ", ttl);
	468	else
	469	print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit");
6856fb65	470
e3945d92	471	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) {
6856fb65 JF	472	print_bool(PRINT_ANY,
	473	"ip6_tnl_f_ign_encap_limit",
	474	"encaplimit none ",
	475	true);
e3945d92 SP	476	} else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
e3945d92 SP	477	__u8 val = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);
af89576d	478
e3945d92	479	print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
af89576d	480	}
af89576d	481
2e706e12	482	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
6856fb65	483	print_bool(PRINT_ANY,
2e706e12 SH	484	"ip6_tnl_f_use_orig_tclass",
2e706e12 SH	485	"tclass inherit ",
6856fb65	486	true);
090524f8 SP	487	} else if (tb[IFLA_GRE_FLOWINFO]) {
090524f8 SP	488	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
6856fb65	489
090524f8 SP	490	snprintf(s2, sizeof(s2), "0x%02x", val);
090524f8 SP	491	print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
6856fb65	492	}
af89576d	493
763cf495	494	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
2e706e12	495	print_bool(PRINT_ANY,
763cf495 SP	496	"ip6_tnl_f_use_orig_flowlabel",
763cf495 SP	497	"flowlabel inherit ",
2e706e12	498	true);
763cf495 SP	499	} else if (tb[IFLA_GRE_FLOWINFO]) {
763cf495 SP	500	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);
2e706e12	501
763cf495 SP	502	snprintf(s2, sizeof(s2), "0x%05x", val);
763cf495 SP	503	print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
2e706e12	504	}
af89576d	505
af89576d	506	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
6856fb65 JF	507	print_bool(PRINT_ANY,
	508	"ip6_tnl_f_rcv_dscp_copy",
	509	"dscp inherit ",
	510	true);
af89576d	511
	512	if (tb[IFLA_GRE_IFLAGS])
	513	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
	514
	515	if (tb[IFLA_GRE_OFLAGS])
	516	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
	517
	518	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
	519	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
6856fb65	520	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
af89576d	521	}
	522
	523	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
	524	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
6856fb65	525	print_string(PRINT_ANY, "okey", "okey %s ", s2);
af89576d	526	}
	527
	528	if (iflags & GRE_SEQ)
6856fb65	529	print_bool(PRINT_ANY, "iseq", "iseq ", true);
af89576d	530	if (oflags & GRE_SEQ)
6856fb65	531	print_bool(PRINT_ANY, "oseq", "oseq ", true);
af89576d	532	if (iflags & GRE_CSUM)
6856fb65	533	print_bool(PRINT_ANY, "icsum", "icsum ", true);
af89576d	534	if (oflags & GRE_CSUM)
6856fb65	535	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
0b2fbb73	536
e97ad3d2	537	if (flags & IP6_TNL_F_USE_ORIG_FWMARK) {
6856fb65 JF	538	print_bool(PRINT_ANY,
	539	"ip6_tnl_f_use_orig_fwmark",
	540	"fwmark inherit ",
	541	true);
e97ad3d2	542	} else if (tb[IFLA_GRE_FWMARK]) {
6856fb65 JF	543	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	544
	545	if (fwmark) {
e97ad3d2 SP	546	print_0xhex(PRINT_ANY,
e97ad3d2 SP	547	"fwmark", "fwmark 0x%x ", fwmark);
6856fb65 JF	548	}
6856fb65 JF	549	}
ad4b1425	550
8595cc40 WT	551	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
8595cc40 WT	552	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
3cb92eb9 SP	553	print_uint(PRINT_ANY,
3cb92eb9 SP	554	"erspan_index", "erspan_index %u ", erspan_idx);
28976362 WT	555	}
	556
	557	if (tb[IFLA_GRE_ERSPAN_VER]) {
	558	__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);
	559
	560	print_uint(PRINT_ANY, "erspan_ver", "erspan_ver %u ", erspan_ver);
	561	}
	562
	563	if (tb[IFLA_GRE_ERSPAN_DIR]) {
	564	__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);
	565
	566	if (erspan_dir == 0)
	567	print_string(PRINT_ANY, "erspan_dir",
	568	"erspan_dir ingress ", NULL);
	569	else
	570	print_string(PRINT_ANY, "erspan_dir",
	571	"erspan_dir egress ", NULL);
	572	}
	573
	574	if (tb[IFLA_GRE_ERSPAN_HWID]) {
	575	__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);
	576
	577	print_hex(PRINT_ANY, "erspan_hwid", "erspan_hwid 0x%x ", erspan_hwid);
8595cc40 WT	578	}
8595cc40 WT	579
bad76e6b SP	580	tnl_print_encap(tb,
	581	IFLA_GRE_ENCAP_TYPE,
	582	IFLA_GRE_ENCAP_FLAGS,
	583	IFLA_GRE_ENCAP_SPORT,
	584	IFLA_GRE_ENCAP_DPORT);
af89576d	585	}
af89576d	586
561e650e	587	static void gre_print_help(struct link_util lu, int argc, char *argv,
de54cdd3	588	FILE *f)
561e650e	589	{
	590	print_usage(f);
	591	}
	592
af89576d	593	struct link_util ip6gre_link_util = {
	594	.id = "ip6gre",
	595	.maxattr = IFLA_GRE_MAX,
	596	.parse_opt = gre_parse_opt,
	597	.print_opt = gre_print_opt,
561e650e	598	.print_help = gre_print_help,
af89576d	599	};
	600
	601	struct link_util ip6gretap_link_util = {
	602	.id = "ip6gretap",
	603	.maxattr = IFLA_GRE_MAX,
	604	.parse_opt = gre_parse_opt,
	605	.print_opt = gre_print_opt,
561e650e	606	.print_help = gre_print_help,
af89576d	607	};
8595cc40 WT	608
	609	struct link_util ip6erspan_link_util = {
	610	.id = "ip6erspan",
	611	.maxattr = IFLA_GRE_MAX,
	612	.parse_opt = gre_parse_opt,
	613	.print_opt = gre_print_opt,
	614	.print_help = gre_print_help,
	615	};