[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 gre_print_help(struct link_util *lu, int argc, char **argv, FILE *f)
{
	fprintf(f,
		"Usage: ... %-9s [ remote ADDR ]\n",
		lu->id
	);
	fprintf(f,
		"                     [ 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"
		"                     [ dev PHYS_DEV ]\n"
		"                     [ fwmark MARK ]\n"
		"                     [ [no]allow-localremote ]\n"
		"                     [ external ]\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"
		"\n"
	);
	fprintf(f,
		"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 int gre_parse_opt(struct link_util *lu, int argc, char **argv,
			 struct nlmsghdr *n)
{
	struct ifinfomsg *ifi = NLMSG_DATA(n);
	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];
	int len;
	__u16 iflags = 0;
	__u16 oflags = 0;
	__be32 ikey = 0;
	__be32 okey = 0;
	inet_prefix saddr, daddr;
	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
	__u32 flowinfo = 0;
	__u32 flags = 0;
	__u32 link = 0;
	__u16 encaptype = 0;
	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	__u16 encapsport = 0;
	__u16 encapdport = 0;
	__u8 metadata = 0;
	__u32 fwmark = 0;
	__u32 erspan_idx = 0;
	__u8 erspan_ver = 0;
	__u8 erspan_dir = 0;
	__u16 erspan_hwid = 0;

	inet_prefix_reset(&saddr);
	inet_prefix_reset(&daddr);

	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
		const struct rtattr *rta;

		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]);

		rta = greinfo[IFLA_GRE_LOCAL];
		if (rta && get_addr_rta(&saddr, rta, AF_INET6))
			goto get_failed;

		rta = greinfo[IFLA_GRE_REMOTE];
		if (rta && get_addr_rta(&daddr, rta, AF_INET6))
			goto get_failed;

		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_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_COLLECT_METADATA])
			metadata = 1;

		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")) {
			NEXT_ARG();
			get_addr(&daddr, *argv, AF_INET6);
		} else if (!matches(*argv, "local")) {
			NEXT_ARG();
			get_addr(&saddr, *argv, AF_INET6);
		} else if (!matches(*argv, "dev")) {
			NEXT_ARG();
			link = ll_name_to_index(*argv);
			if (!link)
				exit(nodev(*argv));
		} 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, "allow-localremote") == 0) {
			flags |= IP6_TNL_F_ALLOW_LOCAL_REMOTE;
		} else if (strcmp(*argv, "noallow-localremote") == 0) {
			flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE;
		} 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 {
			gre_print_help(lu, argc, argv, stderr);
			return -1;
		}
		argc--; argv++;
	}

	if (metadata) {
		addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
		return 0;
	}

	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);
	if (is_addrtype_inet(&saddr))
		addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
	if (is_addrtype_inet(&daddr))
		addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
	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));

	return 0;
}

static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	char s2[64];
	__u16 iflags = 0;
	__u16 oflags = 0;
	__u32 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]) {
		__u32 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_ALLOW_LOCAL_REMOTE)
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_allow_local_remote",
			   "allow-localremote ",
			   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_0xhex(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);
}

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
ae91205c	33	static void gre_print_help(struct link_util lu, int argc, char argv, FILE f)
af89576d	34	{
8b471354	35	fprintf(f,
ae91205c SP	36	"Usage: ... %-9s [ remote ADDR ]\n",
	37	lu->id
	38	);
	39	fprintf(f,
	40	" [ local ADDR ]\n"
	41	" [ [i\|o]seq ]\n"
	42	" [ [i\|o]key KEY ]\n"
	43	" [ [i\|o]csum ]\n"
	44	" [ hoplimit TTL ]\n"
	45	" [ encaplimit ELIM ]\n"
	46	" [ tclass TCLASS ]\n"
	47	" [ flowlabel FLOWLABEL ]\n"
	48	" [ dscp inherit ]\n"
	49	" [ dev PHYS_DEV ]\n"
	50	" [ fwmark MARK ]\n"
f798a8ab	51	" [ [no]allow-localremote ]\n"
ae91205c SP	52	" [ external ]\n"
	53	" [ noencap ]\n"
	54	" [ encap { fou \| gue \| none } ]\n"
	55	" [ encap-sport PORT ]\n"
	56	" [ encap-dport PORT ]\n"
	57	" [ [no]encap-csum ]\n"
	58	" [ [no]encap-csum6 ]\n"
	59	" [ [no]encap-remcsum ]\n"
	60	" [ erspan_ver version ]\n"
	61	" [ erspan IDX ]\n"
	62	" [ erspan_dir { ingress \| egress } ]\n"
	63	" [ erspan_hwid hwid ]\n"
8b471354	64	"\n"
ae91205c SP	65	);
ae91205c SP	66	fprintf(f,
8b471354 PS	67	"Where: ADDR := IPV6_ADDRESS\n"
	68	" TTL := { 0..255 } (default=%d)\n"
	69	" KEY := { DOTTED_QUAD \| NUMBER }\n"
	70	" ELIM := { none \| 0..255 }(default=%d)\n"
	71	" TCLASS := { 0x0..0xff \| inherit }\n"
ad4b1425 CG	72	" FLOWLABEL := { 0x0..0xfffff \| inherit }\n"
ad4b1425 CG	73	" MARK := { 0x0..0xffffffff \| inherit }\n",
8b471354 PS	74	DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
8b471354 PS	75	);
561e650e	76	}
561e650e	77
af89576d	78	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	79	struct nlmsghdr *n)
	80	{
28254695	81	struct ifinfomsg *ifi = NLMSG_DATA(n);
af89576d	82	struct {
	83	struct nlmsghdr n;
	84	struct ifinfomsg i;
d17b136f PS	85	} req = {
	86	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	87	.n.nlmsg_flags = NLM_F_REQUEST,
	88	.n.nlmsg_type = RTM_GETLINK,
	89	.i.ifi_family = preferred_family,
	90	.i.ifi_index = ifi->ifi_index,
	91	};
08ede25f	92	struct nlmsghdr *answer;
af89576d	93	struct rtattr *tb[IFLA_MAX + 1];
	94	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	95	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
5bd93795	96	int len;
af89576d	97	__u16 iflags = 0;
af89576d	98	__u16 oflags = 0;
1f44b937 SP	99	__be32 ikey = 0;
1f44b937 SP	100	__be32 okey = 0;
a066cc66	101	inet_prefix saddr, daddr;
af89576d	102	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
af89576d	103	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
5bd93795 SP	104	__u32 flowinfo = 0;
	105	__u32 flags = 0;
	106	__u32 link = 0;
0b2fbb73 TH	107	__u16 encaptype = 0;
	108	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	109	__u16 encapsport = 0;
	110	__u16 encapdport = 0;
6231c5be	111	__u8 metadata = 0;
ad4b1425	112	__u32 fwmark = 0;
8595cc40	113	__u32 erspan_idx = 0;
28976362 WT	114	__u8 erspan_ver = 0;
	115	__u8 erspan_dir = 0;
	116	__u16 erspan_hwid = 0;
af89576d	117
a066cc66 SP	118	inet_prefix_reset(&saddr);
	119	inet_prefix_reset(&daddr);
	120
af89576d	121	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
a066cc66 SP	122	const struct rtattr *rta;
a066cc66 SP	123
86bf43c7	124	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
af89576d	125	get_failed:
	126	fprintf(stderr,
	127	"Failed to get existing tunnel info.\n");
	128	return -1;
	129	}
	130
86bf43c7	131	len = answer->nlmsg_len;
af89576d	132	len -= NLMSG_LENGTH(sizeof(*ifi));
	133	if (len < 0)
	134	goto get_failed;
	135
86bf43c7	136	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
af89576d	137
	138	if (!tb[IFLA_LINKINFO])
	139	goto get_failed;
	140
	141	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	142
	143	if (!linkinfo[IFLA_INFO_DATA])
	144	goto get_failed;
	145
	146	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	147	linkinfo[IFLA_INFO_DATA]);
	148
a066cc66 SP	149	rta = greinfo[IFLA_GRE_LOCAL];
	150	if (rta && get_addr_rta(&saddr, rta, AF_INET6))
	151	goto get_failed;
	152
	153	rta = greinfo[IFLA_GRE_REMOTE];
	154	if (rta && get_addr_rta(&daddr, rta, AF_INET6))
	155	goto get_failed;
	156
af89576d	157	if (greinfo[IFLA_GRE_IKEY])
	158	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
	159
	160	if (greinfo[IFLA_GRE_OKEY])
	161	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
	162
	163	if (greinfo[IFLA_GRE_IFLAGS])
	164	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
	165
	166	if (greinfo[IFLA_GRE_OFLAGS])
	167	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
	168
af89576d	169	if (greinfo[IFLA_GRE_TTL])
	170	hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	171
	172	if (greinfo[IFLA_GRE_LINK])
	173	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
	174
	175	if (greinfo[IFLA_GRE_ENCAP_LIMIT])
	176	encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);
	177
	178	if (greinfo[IFLA_GRE_FLOWINFO])
	179	flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);
	180
	181	if (greinfo[IFLA_GRE_FLAGS])
	182	flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);
0b2fbb73 TH	183
	184	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	185	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	186
	187	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	188	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	189
	190	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	191	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	192
	193	if (greinfo[IFLA_GRE_ENCAP_DPORT])
	194	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
ad4b1425	195
5bd93795 SP	196	if (greinfo[IFLA_GRE_COLLECT_METADATA])
	197	metadata = 1;
	198
ad4b1425 CG	199	if (greinfo[IFLA_GRE_FWMARK])
ad4b1425 CG	200	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
86bf43c7	201
8595cc40 WT	202	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	203	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
	204
28976362 WT	205	if (greinfo[IFLA_GRE_ERSPAN_VER])
	206	erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);
	207
	208	if (greinfo[IFLA_GRE_ERSPAN_DIR])
	209	erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);
	210
	211	if (greinfo[IFLA_GRE_ERSPAN_HWID])
	212	erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);
	213
86bf43c7	214	free(answer);
af89576d	215	}
	216
	217	while (argc > 0) {
	218	if (!matches(*argv, "key")) {
af89576d	219	NEXT_ARG();
	220	iflags \|= GRE_KEY;
	221	oflags \|= GRE_KEY;
1f44b937	222	ikey = okey = tnl_parse_key("key", *argv);
af89576d	223	} else if (!matches(*argv, "ikey")) {
af89576d	224	NEXT_ARG();
af89576d	225	iflags \|= GRE_KEY;
1f44b937	226	ikey = tnl_parse_key("ikey", *argv);
af89576d	227	} else if (!matches(*argv, "okey")) {
af89576d	228	NEXT_ARG();
af89576d	229	oflags \|= GRE_KEY;
1f44b937	230	okey = tnl_parse_key("okey", *argv);
af89576d	231	} else if (!matches(*argv, "seq")) {
	232	iflags \|= GRE_SEQ;
	233	oflags \|= GRE_SEQ;
	234	} else if (!matches(*argv, "iseq")) {
	235	iflags \|= GRE_SEQ;
	236	} else if (!matches(*argv, "oseq")) {
	237	oflags \|= GRE_SEQ;
	238	} else if (!matches(*argv, "csum")) {
	239	iflags \|= GRE_CSUM;
	240	oflags \|= GRE_CSUM;
	241	} else if (!matches(*argv, "icsum")) {
	242	iflags \|= GRE_CSUM;
	243	} else if (!matches(*argv, "ocsum")) {
	244	oflags \|= GRE_CSUM;
	245	} else if (!matches(*argv, "remote")) {
af89576d	246	NEXT_ARG();
a066cc66	247	get_addr(&daddr, *argv, AF_INET6);
af89576d	248	} else if (!matches(*argv, "local")) {
af89576d	249	NEXT_ARG();
a066cc66	250	get_addr(&saddr, *argv, AF_INET6);
af89576d	251	} else if (!matches(*argv, "dev")) {
af89576d	252	NEXT_ARG();
7a14358b	253	link = ll_name_to_index(*argv);
fe99adbc SP	254	if (!link)
fe99adbc SP	255	exit(nodev(*argv));
af89576d	256	} else if (!matches(*argv, "ttl") \|\|
c4743c4d SP	257	!matches(*argv, "hoplimit") \|\|
c4743c4d SP	258	!matches(*argv, "hlim")) {
af89576d	259	NEXT_ARG();
c4743c4d SP	260	if (strcmp(*argv, "inherit") != 0) {
	261	if (get_u8(&hop_limit, *argv, 0))
	262	invarg("invalid HLIM\n", *argv);
	263	} else
	264	hop_limit = 0;
af89576d	265	} else if (!matches(*argv, "tos") \|\|
	266	!matches(*argv, "tclass") \|\|
	267	!matches(*argv, "dsfield")) {
	268	__u8 uval;
56f5daac	269
af89576d	270	NEXT_ARG();
afdf9277	271	flowinfo &= ~IP6_FLOWINFO_TCLASS;
af89576d	272	if (strcmp(*argv, "inherit") == 0)
	273	flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	274	else {
	275	if (get_u8(&uval, *argv, 16))
	276	invarg("invalid TClass", *argv);
	277	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	278	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	279	}
	280	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	281	strcmp(*argv, "fl") == 0) {
	282	__u32 uval;
56f5daac	283
af89576d	284	NEXT_ARG();
afdf9277	285	flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
af89576d	286	if (strcmp(*argv, "inherit") == 0)
	287	flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	288	else {
	289	if (get_u32(&uval, *argv, 16))
	290	invarg("invalid Flowlabel", *argv);
	291	if (uval > 0xFFFFF)
	292	invarg("invalid Flowlabel", *argv);
	293	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	294	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	295	}
	296	} else if (strcmp(*argv, "dscp") == 0) {
	297	NEXT_ARG();
	298	if (strcmp(*argv, "inherit") != 0)
	299	invarg("not inherit", *argv);
	300	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
0b2fbb73 TH	301	} else if (strcmp(*argv, "noencap") == 0) {
	302	encaptype = TUNNEL_ENCAP_NONE;
	303	} else if (strcmp(*argv, "encap") == 0) {
	304	NEXT_ARG();
	305	if (strcmp(*argv, "fou") == 0)
	306	encaptype = TUNNEL_ENCAP_FOU;
	307	else if (strcmp(*argv, "gue") == 0)
	308	encaptype = TUNNEL_ENCAP_GUE;
	309	else if (strcmp(*argv, "none") == 0)
	310	encaptype = TUNNEL_ENCAP_NONE;
	311	else
	312	invarg("Invalid encap type.", *argv);
	313	} else if (strcmp(*argv, "encap-sport") == 0) {
	314	NEXT_ARG();
	315	if (strcmp(*argv, "auto") == 0)
	316	encapsport = 0;
	317	else if (get_u16(&encapsport, *argv, 0))
	318	invarg("Invalid source port.", *argv);
	319	} else if (strcmp(*argv, "encap-dport") == 0) {
	320	NEXT_ARG();
	321	if (get_u16(&encapdport, *argv, 0))
	322	invarg("Invalid destination port.", *argv);
	323	} else if (strcmp(*argv, "encap-csum") == 0) {
	324	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	325	} else if (strcmp(*argv, "noencap-csum") == 0) {
	326	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	327	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	328	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	329	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	330	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
	331	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	332	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	333	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	334	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
6231c5be WT	335	} else if (strcmp(*argv, "external") == 0) {
6231c5be WT	336	metadata = 1;
ad4b1425 CG	337	} else if (strcmp(*argv, "fwmark") == 0) {
	338	NEXT_ARG();
	339	if (strcmp(*argv, "inherit") == 0) {
	340	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
	341	fwmark = 0;
	342	} else {
	343	if (get_u32(&fwmark, *argv, 0))
	344	invarg("invalid fwmark\n", *argv);
	345	flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
	346	}
f798a8ab PM	347	} else if (strcmp(*argv, "allow-localremote") == 0) {
	348	flags \|= IP6_TNL_F_ALLOW_LOCAL_REMOTE;
	349	} else if (strcmp(*argv, "noallow-localremote") == 0) {
	350	flags &= ~IP6_TNL_F_ALLOW_LOCAL_REMOTE;
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);
ae91205c SP	387	} else {
	388	gre_print_help(lu, argc, argv, stderr);
	389	return -1;
	390	}
af89576d	391	argc--; argv++;
	392	}
	393
5bd93795	394	if (metadata) {
6231c5be	395	addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
5bd93795 SP	396	return 0;
	397	}
	398
	399	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	400	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	401	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	402	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
a066cc66 SP	403	if (is_addrtype_inet(&saddr))
	404	addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
	405	if (is_addrtype_inet(&daddr))
	406	addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
5bd93795 SP	407	if (link)
	408	addattr32(n, 1024, IFLA_GRE_LINK, link);
	409	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	410	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	411	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
	412	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
	413	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
	414	if (erspan_ver) {
	415	addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
	416	if (erspan_ver == 1 && erspan_idx != 0) {
	417	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
	418	} else if (erspan_ver == 2) {
	419	addattr8(n, 1024, IFLA_GRE_ERSPAN_DIR, erspan_dir);
	420	addattr16(n, 1024, IFLA_GRE_ERSPAN_HWID, erspan_hwid);
	421	}
6231c5be	422	}
5bd93795 SP	423	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	424	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	425	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	426	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
0b2fbb73	427
af89576d	428	return 0;
	429	}
	430
	431	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	432	{
af89576d	433	char s2[64];
5bd93795 SP	434	__u16 iflags = 0;
	435	__u16 oflags = 0;
	436	__u32 flags = 0;
090524f8	437	__u32 flowinfo = 0;
375560c4	438	__u8 ttl = 0;
af89576d	439
	440	if (!tb)
	441	return;
	442
6231c5be	443	if (tb[IFLA_GRE_COLLECT_METADATA]) {
00ff4b8e	444	print_bool(PRINT_ANY, "external", "external", true);
6231c5be WT	445	return;
	446	}
	447
af89576d	448	if (tb[IFLA_GRE_FLAGS])
	449	flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);
	450
	451	if (tb[IFLA_GRE_FLOWINFO])
35893864	452	flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);
af89576d	453
b761fc41 SP	454	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET6);
b761fc41 SP	455	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET6);
af89576d	456
45d3a6ef	457	if (tb[IFLA_GRE_LINK]) {
5bd93795	458	__u32 link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
af89576d	459
45d3a6ef SP	460	if (link) {
	461	print_string(PRINT_ANY, "link", "dev %s ",
	462	ll_index_to_name(link));
	463	}
af89576d	464	}
af89576d	465
375560c4 SP	466	if (tb[IFLA_GRE_TTL])
	467	ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	468	if (is_json_context() \|\| ttl)
	469	print_uint(PRINT_ANY, "ttl", "hoplimit %u ", ttl);
	470	else
	471	print_string(PRINT_FP, NULL, "hoplimit %s ", "inherit");
6856fb65	472
e3945d92	473	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) {
6856fb65 JF	474	print_bool(PRINT_ANY,
	475	"ip6_tnl_f_ign_encap_limit",
	476	"encaplimit none ",
	477	true);
e3945d92 SP	478	} else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
e3945d92 SP	479	__u8 val = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);
af89576d	480
e3945d92	481	print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
af89576d	482	}
af89576d	483
2e706e12	484	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
6856fb65	485	print_bool(PRINT_ANY,
2e706e12 SH	486	"ip6_tnl_f_use_orig_tclass",
2e706e12 SH	487	"tclass inherit ",
6856fb65	488	true);
090524f8 SP	489	} else if (tb[IFLA_GRE_FLOWINFO]) {
090524f8 SP	490	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
6856fb65	491
090524f8 SP	492	snprintf(s2, sizeof(s2), "0x%02x", val);
090524f8 SP	493	print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
6856fb65	494	}
af89576d	495
763cf495	496	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
2e706e12	497	print_bool(PRINT_ANY,
763cf495 SP	498	"ip6_tnl_f_use_orig_flowlabel",
763cf495 SP	499	"flowlabel inherit ",
2e706e12	500	true);
763cf495 SP	501	} else if (tb[IFLA_GRE_FLOWINFO]) {
763cf495 SP	502	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);
2e706e12	503
763cf495 SP	504	snprintf(s2, sizeof(s2), "0x%05x", val);
763cf495 SP	505	print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
2e706e12	506	}
af89576d	507
af89576d	508	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
6856fb65 JF	509	print_bool(PRINT_ANY,
	510	"ip6_tnl_f_rcv_dscp_copy",
	511	"dscp inherit ",
	512	true);
af89576d	513
	514	if (tb[IFLA_GRE_IFLAGS])
	515	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
	516
	517	if (tb[IFLA_GRE_OFLAGS])
	518	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
	519
	520	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
	521	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
6856fb65	522	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
af89576d	523	}
	524
	525	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
	526	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
6856fb65	527	print_string(PRINT_ANY, "okey", "okey %s ", s2);
af89576d	528	}
	529
	530	if (iflags & GRE_SEQ)
6856fb65	531	print_bool(PRINT_ANY, "iseq", "iseq ", true);
af89576d	532	if (oflags & GRE_SEQ)
6856fb65	533	print_bool(PRINT_ANY, "oseq", "oseq ", true);
af89576d	534	if (iflags & GRE_CSUM)
6856fb65	535	print_bool(PRINT_ANY, "icsum", "icsum ", true);
af89576d	536	if (oflags & GRE_CSUM)
6856fb65	537	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
0b2fbb73	538
f798a8ab PM	539	if (flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE)
	540	print_bool(PRINT_ANY,
	541	"ip6_tnl_f_allow_local_remote",
	542	"allow-localremote ",
	543	true);
	544
e97ad3d2	545	if (flags & IP6_TNL_F_USE_ORIG_FWMARK) {
6856fb65 JF	546	print_bool(PRINT_ANY,
	547	"ip6_tnl_f_use_orig_fwmark",
	548	"fwmark inherit ",
	549	true);
e97ad3d2	550	} else if (tb[IFLA_GRE_FWMARK]) {
6856fb65 JF	551	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	552
	553	if (fwmark) {
e97ad3d2 SP	554	print_0xhex(PRINT_ANY,
e97ad3d2 SP	555	"fwmark", "fwmark 0x%x ", fwmark);
6856fb65 JF	556	}
6856fb65 JF	557	}
ad4b1425	558
8595cc40 WT	559	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
8595cc40 WT	560	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
5bd93795	561
3cb92eb9 SP	562	print_uint(PRINT_ANY,
3cb92eb9 SP	563	"erspan_index", "erspan_index %u ", erspan_idx);
28976362 WT	564	}
	565
	566	if (tb[IFLA_GRE_ERSPAN_VER]) {
	567	__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);
	568
db2b8b6e SP	569	print_uint(PRINT_ANY,
db2b8b6e SP	570	"erspan_ver", "erspan_ver %u ", erspan_ver);
28976362 WT	571	}
	572
	573	if (tb[IFLA_GRE_ERSPAN_DIR]) {
	574	__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);
	575
	576	if (erspan_dir == 0)
	577	print_string(PRINT_ANY, "erspan_dir",
	578	"erspan_dir ingress ", NULL);
	579	else
	580	print_string(PRINT_ANY, "erspan_dir",
	581	"erspan_dir egress ", NULL);
	582	}
	583
	584	if (tb[IFLA_GRE_ERSPAN_HWID]) {
	585	__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);
	586
db2b8b6e SP	587	print_0xhex(PRINT_ANY,
db2b8b6e SP	588	"erspan_hwid", "erspan_hwid 0x%x ", erspan_hwid);
8595cc40 WT	589	}
8595cc40 WT	590
bad76e6b SP	591	tnl_print_encap(tb,
	592	IFLA_GRE_ENCAP_TYPE,
	593	IFLA_GRE_ENCAP_FLAGS,
	594	IFLA_GRE_ENCAP_SPORT,
	595	IFLA_GRE_ENCAP_DPORT);
af89576d	596	}
	597
	598	struct link_util ip6gre_link_util = {
	599	.id = "ip6gre",
	600	.maxattr = IFLA_GRE_MAX,
	601	.parse_opt = gre_parse_opt,
	602	.print_opt = gre_print_opt,
561e650e	603	.print_help = gre_print_help,
af89576d	604	};
	605
	606	struct link_util ip6gretap_link_util = {
	607	.id = "ip6gretap",
	608	.maxattr = IFLA_GRE_MAX,
	609	.parse_opt = gre_parse_opt,
	610	.print_opt = gre_print_opt,
561e650e	611	.print_help = gre_print_help,
af89576d	612	};
8595cc40 WT	613
	614	struct link_util ip6erspan_link_util = {
	615	.id = "ip6erspan",
	616	.maxattr = IFLA_GRE_MAX,
	617	.parse_opt = gre_parse_opt,
	618	.print_opt = gre_print_opt,
	619	.print_help = gre_print_help,
	620	};