[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 IDX ]\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;
	int len;
	__u32 fwmark = 0;
	__u32 erspan_idx = 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_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]);

		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 = 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();
			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, "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
			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);
	if (erspan_idx != 0)
		addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);

	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;
	__u32 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]) {
		__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) {
			snprintf(s2, sizeof(s2), "0x%x", fwmark);

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

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

	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,
};

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"
8595cc40	55	" [ erspan IDX ]\n"
8b471354 PS	56	"\n"
	57	"Where: ADDR := IPV6_ADDRESS\n"
	58	" TTL := { 0..255 } (default=%d)\n"
	59	" KEY := { DOTTED_QUAD \| NUMBER }\n"
	60	" ELIM := { none \| 0..255 }(default=%d)\n"
	61	" TCLASS := { 0x0..0xff \| inherit }\n"
ad4b1425 CG	62	" FLOWLABEL := { 0x0..0xfffff \| inherit }\n"
ad4b1425 CG	63	" MARK := { 0x0..0xffffffff \| inherit }\n",
8b471354 PS	64	DEFAULT_TNL_HOP_LIMIT, IPV6_DEFAULT_TNL_ENCAP_LIMIT
8b471354 PS	65	);
561e650e	66	}
	67
	68	static void usage(void) __attribute__((noreturn));
	69	static void usage(void)
	70	{
	71	print_usage(stderr);
af89576d	72	exit(-1);
	73	}
	74
	75	static int gre_parse_opt(struct link_util lu, int argc, char *argv,
	76	struct nlmsghdr *n)
	77	{
d17b136f	78	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
af89576d	79	struct {
	80	struct nlmsghdr n;
	81	struct ifinfomsg i;
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	};
08ede25f	89	struct nlmsghdr *answer;
af89576d	90	struct rtattr *tb[IFLA_MAX + 1];
	91	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	92	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
	93	__u16 iflags = 0;
	94	__u16 oflags = 0;
1f44b937 SP	95	__be32 ikey = 0;
1f44b937 SP	96	__be32 okey = 0;
af89576d	97	struct in6_addr raddr = IN6ADDR_ANY_INIT;
af89576d	98	struct in6_addr laddr = IN6ADDR_ANY_INIT;
56f5daac SH	99	unsigned int link = 0;
	100	unsigned int flowinfo = 0;
	101	unsigned int flags = 0;
af89576d	102	__u8 hop_limit = DEFAULT_TNL_HOP_LIMIT;
af89576d	103	__u8 encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
0b2fbb73 TH	104	__u16 encaptype = 0;
	105	__u16 encapflags = TUNNEL_ENCAP_FLAG_CSUM6;
	106	__u16 encapsport = 0;
	107	__u16 encapdport = 0;
af89576d	108	int len;
ad4b1425	109	__u32 fwmark = 0;
8595cc40	110	__u32 erspan_idx = 0;
af89576d	111
af89576d	112	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
86bf43c7	113	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
af89576d	114	get_failed:
	115	fprintf(stderr,
	116	"Failed to get existing tunnel info.\n");
	117	return -1;
	118	}
	119
86bf43c7	120	len = answer->nlmsg_len;
af89576d	121	len -= NLMSG_LENGTH(sizeof(*ifi));
	122	if (len < 0)
	123	goto get_failed;
	124
86bf43c7	125	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
af89576d	126
	127	if (!tb[IFLA_LINKINFO])
	128	goto get_failed;
	129
	130	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	131
	132	if (!linkinfo[IFLA_INFO_DATA])
	133	goto get_failed;
	134
	135	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	136	linkinfo[IFLA_INFO_DATA]);
	137
	138	if (greinfo[IFLA_GRE_IKEY])
	139	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
	140
	141	if (greinfo[IFLA_GRE_OKEY])
	142	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
	143
	144	if (greinfo[IFLA_GRE_IFLAGS])
	145	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
	146
	147	if (greinfo[IFLA_GRE_OFLAGS])
	148	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
	149
	150	if (greinfo[IFLA_GRE_LOCAL])
	151	memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr));
	152
	153	if (greinfo[IFLA_GRE_REMOTE])
	154	memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr));
	155
	156	if (greinfo[IFLA_GRE_TTL])
	157	hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	158
	159	if (greinfo[IFLA_GRE_LINK])
	160	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
	161
	162	if (greinfo[IFLA_GRE_ENCAP_LIMIT])
	163	encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);
	164
	165	if (greinfo[IFLA_GRE_FLOWINFO])
	166	flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);
	167
	168	if (greinfo[IFLA_GRE_FLAGS])
	169	flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);
0b2fbb73 TH	170
	171	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	172	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	173
	174	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	175	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	176
	177	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	178	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	179
	180	if (greinfo[IFLA_GRE_ENCAP_DPORT])
	181	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
ad4b1425 CG	182
	183	if (greinfo[IFLA_GRE_FWMARK])
	184	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
86bf43c7	185
8595cc40 WT	186	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	187	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
	188
86bf43c7	189	free(answer);
af89576d	190	}
	191
	192	while (argc > 0) {
	193	if (!matches(*argv, "key")) {
af89576d	194	NEXT_ARG();
	195	iflags \|= GRE_KEY;
	196	oflags \|= GRE_KEY;
1f44b937	197	ikey = okey = tnl_parse_key("key", *argv);
af89576d	198	} else if (!matches(*argv, "ikey")) {
af89576d	199	NEXT_ARG();
af89576d	200	iflags \|= GRE_KEY;
1f44b937	201	ikey = tnl_parse_key("ikey", *argv);
af89576d	202	} else if (!matches(*argv, "okey")) {
af89576d	203	NEXT_ARG();
af89576d	204	oflags \|= GRE_KEY;
1f44b937	205	okey = tnl_parse_key("okey", *argv);
af89576d	206	} else if (!matches(*argv, "seq")) {
	207	iflags \|= GRE_SEQ;
	208	oflags \|= GRE_SEQ;
	209	} else if (!matches(*argv, "iseq")) {
	210	iflags \|= GRE_SEQ;
	211	} else if (!matches(*argv, "oseq")) {
	212	oflags \|= GRE_SEQ;
	213	} else if (!matches(*argv, "csum")) {
	214	iflags \|= GRE_CSUM;
	215	oflags \|= GRE_CSUM;
	216	} else if (!matches(*argv, "icsum")) {
	217	iflags \|= GRE_CSUM;
	218	} else if (!matches(*argv, "ocsum")) {
	219	oflags \|= GRE_CSUM;
	220	} else if (!matches(*argv, "remote")) {
	221	inet_prefix addr;
56f5daac	222
af89576d	223	NEXT_ARG();
9aceaad7	224	get_addr(&addr, *argv, AF_INET6);
af89576d	225	memcpy(&raddr, &addr.data, sizeof(raddr));
	226	} else if (!matches(*argv, "local")) {
	227	inet_prefix addr;
56f5daac	228
af89576d	229	NEXT_ARG();
9aceaad7	230	get_addr(&addr, *argv, AF_INET6);
af89576d	231	memcpy(&laddr, &addr.data, sizeof(laddr));
	232	} else if (!matches(*argv, "dev")) {
	233	NEXT_ARG();
	234	link = if_nametoindex(*argv);
0cb6bb51 CW	235	if (link == 0) {
	236	fprintf(stderr, "Cannot find device \"%s\"\n",
	237	*argv);
af89576d	238	exit(-1);
0cb6bb51	239	}
af89576d	240	} else if (!matches(*argv, "ttl") \|\|
	241	!matches(*argv, "hoplimit")) {
	242	__u8 uval;
56f5daac	243
af89576d	244	NEXT_ARG();
	245	if (get_u8(&uval, *argv, 0))
	246	invarg("invalid TTL", *argv);
	247	hop_limit = uval;
	248	} else if (!matches(*argv, "tos") \|\|
	249	!matches(*argv, "tclass") \|\|
	250	!matches(*argv, "dsfield")) {
	251	__u8 uval;
56f5daac	252
af89576d	253	NEXT_ARG();
afdf9277	254	flowinfo &= ~IP6_FLOWINFO_TCLASS;
af89576d	255	if (strcmp(*argv, "inherit") == 0)
	256	flags \|= IP6_TNL_F_USE_ORIG_TCLASS;
	257	else {
	258	if (get_u8(&uval, *argv, 16))
	259	invarg("invalid TClass", *argv);
	260	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	261	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	262	}
	263	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	264	strcmp(*argv, "fl") == 0) {
	265	__u32 uval;
56f5daac	266
af89576d	267	NEXT_ARG();
afdf9277	268	flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
af89576d	269	if (strcmp(*argv, "inherit") == 0)
	270	flags \|= IP6_TNL_F_USE_ORIG_FLOWLABEL;
	271	else {
	272	if (get_u32(&uval, *argv, 16))
	273	invarg("invalid Flowlabel", *argv);
	274	if (uval > 0xFFFFF)
	275	invarg("invalid Flowlabel", *argv);
	276	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	277	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	278	}
	279	} else if (strcmp(*argv, "dscp") == 0) {
	280	NEXT_ARG();
	281	if (strcmp(*argv, "inherit") != 0)
	282	invarg("not inherit", *argv);
	283	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
0b2fbb73 TH	284	} else if (strcmp(*argv, "noencap") == 0) {
	285	encaptype = TUNNEL_ENCAP_NONE;
	286	} else if (strcmp(*argv, "encap") == 0) {
	287	NEXT_ARG();
	288	if (strcmp(*argv, "fou") == 0)
	289	encaptype = TUNNEL_ENCAP_FOU;
	290	else if (strcmp(*argv, "gue") == 0)
	291	encaptype = TUNNEL_ENCAP_GUE;
	292	else if (strcmp(*argv, "none") == 0)
	293	encaptype = TUNNEL_ENCAP_NONE;
	294	else
	295	invarg("Invalid encap type.", *argv);
	296	} else if (strcmp(*argv, "encap-sport") == 0) {
	297	NEXT_ARG();
	298	if (strcmp(*argv, "auto") == 0)
	299	encapsport = 0;
	300	else if (get_u16(&encapsport, *argv, 0))
	301	invarg("Invalid source port.", *argv);
	302	} else if (strcmp(*argv, "encap-dport") == 0) {
	303	NEXT_ARG();
	304	if (get_u16(&encapdport, *argv, 0))
	305	invarg("Invalid destination port.", *argv);
	306	} else if (strcmp(*argv, "encap-csum") == 0) {
	307	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	308	} else if (strcmp(*argv, "noencap-csum") == 0) {
	309	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	310	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	311	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	312	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	313	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
	314	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	315	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	316	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	317	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
ad4b1425 CG	318	} else if (strcmp(*argv, "fwmark") == 0) {
	319	NEXT_ARG();
	320	if (strcmp(*argv, "inherit") == 0) {
	321	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
	322	fwmark = 0;
	323	} else {
	324	if (get_u32(&fwmark, *argv, 0))
	325	invarg("invalid fwmark\n", *argv);
	326	flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
	327	}
a11b7b71 ND	328	} else if (strcmp(*argv, "encaplimit") == 0) {
	329	NEXT_ARG();
	330	if (strcmp(*argv, "none") == 0) {
	331	flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
	332	} else {
	333	__u8 uval;
	334
56708ae7	335	if (get_u8(&uval, *argv, 0))
a11b7b71 ND	336	invarg("invalid ELIM", *argv);
	337	encap_limit = uval;
	338	flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
	339	}
8595cc40 WT	340	} else if (strcmp(*argv, "erspan") == 0) {
	341	NEXT_ARG();
	342	if (get_u32(&erspan_idx, *argv, 0))
	343	invarg("invalid erspan index\n", *argv);
	344	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	345	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
af89576d	346	} else
	347	usage();
	348	argc--; argv++;
	349	}
	350
	351	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	352	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	353	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	354	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	355	addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr));
	356	addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr));
	357	if (link)
	358	addattr32(n, 1024, IFLA_GRE_LINK, link);
	359	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	360	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	361	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
35893864	362	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
ad4b1425	363	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
8595cc40 WT	364	if (erspan_idx != 0)
8595cc40 WT	365	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
af89576d	366
0b2fbb73 TH	367	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	368	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	369	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	370	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	371
af89576d	372	return 0;
	373	}
	374
	375	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	376	{
af89576d	377	char s2[64];
	378	const char *local = "any";
	379	const char *remote = "any";
56f5daac SH	380	unsigned int iflags = 0;
	381	unsigned int oflags = 0;
	382	unsigned int flags = 0;
090524f8	383	__u32 flowinfo = 0;
af89576d	384	struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;
	385
	386	if (!tb)
	387	return;
	388
	389	if (tb[IFLA_GRE_FLAGS])
	390	flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);
	391
	392	if (tb[IFLA_GRE_FLOWINFO])
35893864	393	flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);
af89576d	394
	395	if (tb[IFLA_GRE_REMOTE]) {
	396	struct in6_addr addr;
56f5daac	397
af89576d	398	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_REMOTE]), sizeof(addr));
	399
	400	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	401	remote = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	402	}
af89576d	403
6856fb65	404	print_string(PRINT_ANY, "remote", "remote %s ", remote);
af89576d	405
	406	if (tb[IFLA_GRE_LOCAL]) {
	407	struct in6_addr addr;
56f5daac	408
af89576d	409	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_LOCAL]), sizeof(addr));
	410
	411	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	412	local = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	413	}
af89576d	414
6856fb65	415	print_string(PRINT_ANY, "local", "local %s ", local);
af89576d	416
af89576d	417	if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
56f5daac	418	unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
af89576d	419	const char *n = if_indextoname(link, s2);
	420
	421	if (n)
6856fb65	422	print_string(PRINT_ANY, "link", "dev %s ", n);
af89576d	423	else
6856fb65	424	print_uint(PRINT_ANY, "link_index", "dev %u ", link);
af89576d	425	}
af89576d	426
6856fb65 JF	427	if (tb[IFLA_GRE_TTL]) {
	428	__u8 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	429
	430	if (ttl)
	431	print_int(PRINT_ANY, "ttl", "hoplimit %d ", ttl);
	432	else
	433	print_int(PRINT_JSON, "ttl", NULL, ttl);
	434	}
af89576d	435
e3945d92	436	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT) {
6856fb65 JF	437	print_bool(PRINT_ANY,
	438	"ip6_tnl_f_ign_encap_limit",
	439	"encaplimit none ",
	440	true);
e3945d92 SP	441	} else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
e3945d92 SP	442	__u8 val = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);
af89576d	443
e3945d92	444	print_uint(PRINT_ANY, "encap_limit", "encaplimit %u ", val);
af89576d	445	}
af89576d	446
2e706e12 SH	447	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
	448	print_bool(PRINT_ANY,
	449	"ip6_tnl_f_use_orig_tclass",
	450	"tclass inherit ",
	451	true);
090524f8 SP	452	} else if (tb[IFLA_GRE_FLOWINFO]) {
090524f8 SP	453	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20;
2e706e12	454
090524f8 SP	455	snprintf(s2, sizeof(s2), "0x%02x", val);
090524f8 SP	456	print_string(PRINT_ANY, "tclass", "tclass %s ", s2);
2e706e12	457	}
af89576d	458
763cf495 SP	459	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
	460	print_bool(PRINT_ANY,
	461	"ip6_tnl_f_use_orig_flowlabel",
	462	"flowlabel inherit ",
	463	true);
	464	} else if (tb[IFLA_GRE_FLOWINFO]) {
	465	__u32 val = ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL);
	466
	467	snprintf(s2, sizeof(s2), "0x%05x", val);
	468	print_string(PRINT_ANY, "flowlabel", "flowlabel %s ", s2);
	469	}
	470
af89576d	471	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
6856fb65 JF	472	print_bool(PRINT_ANY,
	473	"ip6_tnl_f_rcv_dscp_copy",
	474	"dscp inherit ",
	475	true);
af89576d	476
	477	if (tb[IFLA_GRE_IFLAGS])
	478	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
	479
	480	if (tb[IFLA_GRE_OFLAGS])
	481	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
	482
	483	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
	484	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
6856fb65	485	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
af89576d	486	}
	487
	488	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
	489	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
6856fb65	490	print_string(PRINT_ANY, "okey", "okey %s ", s2);
af89576d	491	}
	492
	493	if (iflags & GRE_SEQ)
6856fb65	494	print_bool(PRINT_ANY, "iseq", "iseq ", true);
af89576d	495	if (oflags & GRE_SEQ)
6856fb65	496	print_bool(PRINT_ANY, "oseq", "oseq ", true);
af89576d	497	if (iflags & GRE_CSUM)
6856fb65	498	print_bool(PRINT_ANY, "icsum", "icsum ", true);
af89576d	499	if (oflags & GRE_CSUM)
6856fb65	500	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
0b2fbb73	501
ad4b1425	502	if (flags & IP6_TNL_F_USE_ORIG_FWMARK)
6856fb65 JF	503	print_bool(PRINT_ANY,
	504	"ip6_tnl_f_use_orig_fwmark",
	505	"fwmark inherit ",
	506	true);
	507	else if (tb[IFLA_GRE_FWMARK]) {
	508	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	509
	510	if (fwmark) {
	511	snprintf(s2, sizeof(s2), "0x%x", fwmark);
	512
	513	print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
	514	}
	515	}
ad4b1425	516
8595cc40 WT	517	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
	518	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
	519	fprintf(f, "erspan_index %u ", erspan_idx);
	520	}
	521
0b2fbb73 TH	522	if (tb[IFLA_GRE_ENCAP_TYPE] &&
	523	rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
	524	__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
	525	__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
	526	__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
	527	__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);
	528
6856fb65 JF	529	open_json_object("encap");
	530
	531	print_string(PRINT_FP, NULL, "encap ", NULL);
0b2fbb73 TH	532	switch (type) {
0b2fbb73 TH	533	case TUNNEL_ENCAP_FOU:
6856fb65	534	print_string(PRINT_ANY, "type", "%s ", "fou");
0b2fbb73 TH	535	break;
0b2fbb73 TH	536	case TUNNEL_ENCAP_GUE:
6856fb65	537	print_string(PRINT_ANY, "type", "%s ", "gue");
0b2fbb73 TH	538	break;
0b2fbb73 TH	539	default:
6856fb65	540	print_null(PRINT_ANY, "type", "unknown ", NULL);
0b2fbb73 TH	541	break;
	542	}
	543
6856fb65 JF	544	if (is_json_context()) {
	545	print_uint(PRINT_JSON,
	546	"sport",
	547	NULL,
	548	sport ? ntohs(sport) : 0);
	549	print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));
	550	print_bool(PRINT_JSON, "csum", NULL,
	551	flags & TUNNEL_ENCAP_FLAG_CSUM);
	552	print_bool(PRINT_JSON, "csum6", NULL,
	553	flags & TUNNEL_ENCAP_FLAG_CSUM6);
	554	print_bool(PRINT_JSON, "remcsum", NULL,
	555	flags & TUNNEL_ENCAP_FLAG_REMCSUM);
	556	close_json_object();
	557	} else {
	558	if (sport == 0)
	559	fputs("encap-sport auto ", f);
	560	else
	561	fprintf(f, "encap-sport %u", ntohs(sport));
0b2fbb73	562
6856fb65	563	fprintf(f, "encap-dport %u ", ntohs(dport));
0b2fbb73	564
6856fb65 JF	565	if (flags & TUNNEL_ENCAP_FLAG_CSUM)
	566	fputs("encap-csum ", f);
	567	else
	568	fputs("noencap-csum ", f);
0b2fbb73	569
6856fb65 JF	570	if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
	571	fputs("encap-csum6 ", f);
	572	else
	573	fputs("noencap-csum6 ", f);
0b2fbb73	574
6856fb65 JF	575	if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
	576	fputs("encap-remcsum ", f);
	577	else
	578	fputs("noencap-remcsum ", f);
	579	}
0b2fbb73	580	}
af89576d	581	}
af89576d	582
561e650e	583	static void gre_print_help(struct link_util lu, int argc, char *argv,
	584	FILE *f)
	585	{
	586	print_usage(f);
	587	}
	588
af89576d	589	struct link_util ip6gre_link_util = {
	590	.id = "ip6gre",
	591	.maxattr = IFLA_GRE_MAX,
	592	.parse_opt = gre_parse_opt,
	593	.print_opt = gre_print_opt,
561e650e	594	.print_help = gre_print_help,
af89576d	595	};
	596
	597	struct link_util ip6gretap_link_util = {
	598	.id = "ip6gretap",
	599	.maxattr = IFLA_GRE_MAX,
	600	.parse_opt = gre_parse_opt,
	601	.print_opt = gre_print_opt,
561e650e	602	.print_help = gre_print_help,
af89576d	603	};
8595cc40 WT	604
	605	struct link_util ip6erspan_link_util = {
	606	.id = "ip6erspan",
	607	.maxattr = IFLA_GRE_MAX,
	608	.parse_opt = gre_parse_opt,
	609	.print_opt = gre_print_opt,
	610	.print_help = gre_print_help,
	611	};