[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 = NULL;
	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");
			free(answer);
			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();
			if (strcmp(*argv, "inherit") == 0)
				flags |= IP6_TNL_F_USE_ORIG_TCLASS;
			else {
				if (get_u8(&uval, *argv, 16))
					invarg("invalid TClass", *argv);
				flowinfo &= ~IP6_FLOWINFO_TCLASS;
				flowinfo |= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
				flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
			}
		} else if (strcmp(*argv, "flowlabel") == 0 ||
			   strcmp(*argv, "fl") == 0) {
			__u32 uval;

			NEXT_ARG();
			if (strcmp(*argv, "inherit") == 0)
				flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL;
			else {
				if (get_u32(&uval, *argv, 16))
					invarg("invalid Flowlabel", *argv);
				if (uval > 0xFFFFF)
					invarg("invalid Flowlabel", *argv);
				flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
				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;
	unsigned int flowinfo = 0;
	struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;

	if (!tb)
		return;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
		print_bool(PRINT_ANY,
			   "ip6_tnl_f_use_orig_tclass",
			   "tclass inherit ",
			   true);
	} else {
		if (is_json_context()) {
			SPRINT_BUF(b1);

			snprintf(b1, sizeof(b1), "0x%05x",
				 ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20);
			print_string(PRINT_JSON, "tclass", NULL, b1);
		} else {
			fprintf(f, "tclass 0x%02x ",
				 ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20);
		}
	}

	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	};
86bf43c7	89	struct nlmsghdr *answer = NULL;
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");
86bf43c7	117	free(answer);
af89576d	118	return -1;
	119	}
	120
86bf43c7	121	len = answer->nlmsg_len;
af89576d	122	len -= NLMSG_LENGTH(sizeof(*ifi));
	123	if (len < 0)
	124	goto get_failed;
	125
86bf43c7	126	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
af89576d	127
	128	if (!tb[IFLA_LINKINFO])
	129	goto get_failed;
	130
	131	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	132
	133	if (!linkinfo[IFLA_INFO_DATA])
	134	goto get_failed;
	135
	136	parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
	137	linkinfo[IFLA_INFO_DATA]);
	138
	139	if (greinfo[IFLA_GRE_IKEY])
	140	ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
	141
	142	if (greinfo[IFLA_GRE_OKEY])
	143	okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
	144
	145	if (greinfo[IFLA_GRE_IFLAGS])
	146	iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
	147
	148	if (greinfo[IFLA_GRE_OFLAGS])
	149	oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
	150
	151	if (greinfo[IFLA_GRE_LOCAL])
	152	memcpy(&laddr, RTA_DATA(greinfo[IFLA_GRE_LOCAL]), sizeof(laddr));
	153
	154	if (greinfo[IFLA_GRE_REMOTE])
	155	memcpy(&raddr, RTA_DATA(greinfo[IFLA_GRE_REMOTE]), sizeof(raddr));
	156
	157	if (greinfo[IFLA_GRE_TTL])
	158	hop_limit = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
	159
	160	if (greinfo[IFLA_GRE_LINK])
	161	link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
	162
	163	if (greinfo[IFLA_GRE_ENCAP_LIMIT])
	164	encap_limit = rta_getattr_u8(greinfo[IFLA_GRE_ENCAP_LIMIT]);
	165
	166	if (greinfo[IFLA_GRE_FLOWINFO])
	167	flowinfo = rta_getattr_u32(greinfo[IFLA_GRE_FLOWINFO]);
	168
	169	if (greinfo[IFLA_GRE_FLAGS])
	170	flags = rta_getattr_u32(greinfo[IFLA_GRE_FLAGS]);
0b2fbb73 TH	171
	172	if (greinfo[IFLA_GRE_ENCAP_TYPE])
	173	encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
	174
	175	if (greinfo[IFLA_GRE_ENCAP_FLAGS])
	176	encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
	177
	178	if (greinfo[IFLA_GRE_ENCAP_SPORT])
	179	encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
	180
	181	if (greinfo[IFLA_GRE_ENCAP_DPORT])
	182	encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
ad4b1425 CG	183
	184	if (greinfo[IFLA_GRE_FWMARK])
	185	fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
86bf43c7	186
8595cc40 WT	187	if (greinfo[IFLA_GRE_ERSPAN_INDEX])
	188	erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
	189
86bf43c7	190	free(answer);
af89576d	191	}
	192
	193	while (argc > 0) {
	194	if (!matches(*argv, "key")) {
af89576d	195	NEXT_ARG();
	196	iflags \|= GRE_KEY;
	197	oflags \|= GRE_KEY;
1f44b937	198	ikey = okey = tnl_parse_key("key", *argv);
af89576d	199	} else if (!matches(*argv, "ikey")) {
af89576d	200	NEXT_ARG();
af89576d	201	iflags \|= GRE_KEY;
1f44b937	202	ikey = tnl_parse_key("ikey", *argv);
af89576d	203	} else if (!matches(*argv, "okey")) {
af89576d	204	NEXT_ARG();
af89576d	205	oflags \|= GRE_KEY;
1f44b937	206	okey = tnl_parse_key("okey", *argv);
af89576d	207	} else if (!matches(*argv, "seq")) {
	208	iflags \|= GRE_SEQ;
	209	oflags \|= GRE_SEQ;
	210	} else if (!matches(*argv, "iseq")) {
	211	iflags \|= GRE_SEQ;
	212	} else if (!matches(*argv, "oseq")) {
	213	oflags \|= GRE_SEQ;
	214	} else if (!matches(*argv, "csum")) {
	215	iflags \|= GRE_CSUM;
	216	oflags \|= GRE_CSUM;
	217	} else if (!matches(*argv, "icsum")) {
	218	iflags \|= GRE_CSUM;
	219	} else if (!matches(*argv, "ocsum")) {
	220	oflags \|= GRE_CSUM;
	221	} else if (!matches(*argv, "remote")) {
	222	inet_prefix addr;
56f5daac	223
af89576d	224	NEXT_ARG();
9aceaad7	225	get_addr(&addr, *argv, AF_INET6);
af89576d	226	memcpy(&raddr, &addr.data, sizeof(raddr));
	227	} else if (!matches(*argv, "local")) {
	228	inet_prefix addr;
56f5daac	229
af89576d	230	NEXT_ARG();
9aceaad7	231	get_addr(&addr, *argv, AF_INET6);
af89576d	232	memcpy(&laddr, &addr.data, sizeof(laddr));
	233	} else if (!matches(*argv, "dev")) {
	234	NEXT_ARG();
	235	link = if_nametoindex(*argv);
0cb6bb51 CW	236	if (link == 0) {
	237	fprintf(stderr, "Cannot find device \"%s\"\n",
	238	*argv);
af89576d	239	exit(-1);
0cb6bb51	240	}
af89576d	241	} else if (!matches(*argv, "ttl") \|\|
	242	!matches(*argv, "hoplimit")) {
	243	__u8 uval;
56f5daac	244
af89576d	245	NEXT_ARG();
	246	if (get_u8(&uval, *argv, 0))
	247	invarg("invalid TTL", *argv);
	248	hop_limit = uval;
	249	} else if (!matches(*argv, "tos") \|\|
	250	!matches(*argv, "tclass") \|\|
	251	!matches(*argv, "dsfield")) {
	252	__u8 uval;
56f5daac	253
af89576d	254	NEXT_ARG();
	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);
e7fefb32	260	flowinfo &= ~IP6_FLOWINFO_TCLASS;
af89576d	261	flowinfo \|= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
	262	flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
	263	}
	264	} else if (strcmp(*argv, "flowlabel") == 0 \|\|
	265	strcmp(*argv, "fl") == 0) {
	266	__u32 uval;
56f5daac	267
af89576d	268	NEXT_ARG();
	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);
e7fefb32	276	flowinfo &= ~IP6_FLOWINFO_FLOWLABEL;
af89576d	277	flowinfo \|= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
	278	flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
	279	}
	280	} else if (strcmp(*argv, "dscp") == 0) {
	281	NEXT_ARG();
	282	if (strcmp(*argv, "inherit") != 0)
	283	invarg("not inherit", *argv);
	284	flags \|= IP6_TNL_F_RCV_DSCP_COPY;
0b2fbb73 TH	285	} else if (strcmp(*argv, "noencap") == 0) {
	286	encaptype = TUNNEL_ENCAP_NONE;
	287	} else if (strcmp(*argv, "encap") == 0) {
	288	NEXT_ARG();
	289	if (strcmp(*argv, "fou") == 0)
	290	encaptype = TUNNEL_ENCAP_FOU;
	291	else if (strcmp(*argv, "gue") == 0)
	292	encaptype = TUNNEL_ENCAP_GUE;
	293	else if (strcmp(*argv, "none") == 0)
	294	encaptype = TUNNEL_ENCAP_NONE;
	295	else
	296	invarg("Invalid encap type.", *argv);
	297	} else if (strcmp(*argv, "encap-sport") == 0) {
	298	NEXT_ARG();
	299	if (strcmp(*argv, "auto") == 0)
	300	encapsport = 0;
	301	else if (get_u16(&encapsport, *argv, 0))
	302	invarg("Invalid source port.", *argv);
	303	} else if (strcmp(*argv, "encap-dport") == 0) {
	304	NEXT_ARG();
	305	if (get_u16(&encapdport, *argv, 0))
	306	invarg("Invalid destination port.", *argv);
	307	} else if (strcmp(*argv, "encap-csum") == 0) {
	308	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM;
	309	} else if (strcmp(*argv, "noencap-csum") == 0) {
	310	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
	311	} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
	312	encapflags \|= TUNNEL_ENCAP_FLAG_CSUM6;
	313	} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
	314	encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
	315	} else if (strcmp(*argv, "encap-remcsum") == 0) {
	316	encapflags \|= TUNNEL_ENCAP_FLAG_REMCSUM;
	317	} else if (strcmp(*argv, "noencap-remcsum") == 0) {
	318	encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
ad4b1425 CG	319	} else if (strcmp(*argv, "fwmark") == 0) {
	320	NEXT_ARG();
	321	if (strcmp(*argv, "inherit") == 0) {
	322	flags \|= IP6_TNL_F_USE_ORIG_FWMARK;
	323	fwmark = 0;
	324	} else {
	325	if (get_u32(&fwmark, *argv, 0))
	326	invarg("invalid fwmark\n", *argv);
	327	flags &= ~IP6_TNL_F_USE_ORIG_FWMARK;
	328	}
a11b7b71 ND	329	} else if (strcmp(*argv, "encaplimit") == 0) {
	330	NEXT_ARG();
	331	if (strcmp(*argv, "none") == 0) {
	332	flags \|= IP6_TNL_F_IGN_ENCAP_LIMIT;
	333	} else {
	334	__u8 uval;
	335
56708ae7	336	if (get_u8(&uval, *argv, 0))
a11b7b71 ND	337	invarg("invalid ELIM", *argv);
	338	encap_limit = uval;
	339	flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
	340	}
8595cc40 WT	341	} else if (strcmp(*argv, "erspan") == 0) {
	342	NEXT_ARG();
	343	if (get_u32(&erspan_idx, *argv, 0))
	344	invarg("invalid erspan index\n", *argv);
	345	if (erspan_idx & ~((1<<20) - 1) \|\| erspan_idx == 0)
	346	invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
af89576d	347	} else
	348	usage();
	349	argc--; argv++;
	350	}
	351
	352	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
	353	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
	354	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
	355	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
	356	addattr_l(n, 1024, IFLA_GRE_LOCAL, &laddr, sizeof(laddr));
	357	addattr_l(n, 1024, IFLA_GRE_REMOTE, &raddr, sizeof(raddr));
	358	if (link)
	359	addattr32(n, 1024, IFLA_GRE_LINK, link);
	360	addattr_l(n, 1024, IFLA_GRE_TTL, &hop_limit, 1);
	361	addattr_l(n, 1024, IFLA_GRE_ENCAP_LIMIT, &encap_limit, 1);
	362	addattr_l(n, 1024, IFLA_GRE_FLOWINFO, &flowinfo, 4);
35893864	363	addattr32(n, 1024, IFLA_GRE_FLAGS, flags);
ad4b1425	364	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
8595cc40 WT	365	if (erspan_idx != 0)
8595cc40 WT	366	addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
af89576d	367
0b2fbb73 TH	368	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
	369	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
	370	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
	371	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
	372
af89576d	373	return 0;
	374	}
	375
	376	static void gre_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	377	{
af89576d	378	char s2[64];
	379	const char *local = "any";
	380	const char *remote = "any";
56f5daac SH	381	unsigned int iflags = 0;
	382	unsigned int oflags = 0;
	383	unsigned int flags = 0;
	384	unsigned int flowinfo = 0;
af89576d	385	struct in6_addr in6_addr_any = IN6ADDR_ANY_INIT;
	386
	387	if (!tb)
	388	return;
	389
	390	if (tb[IFLA_GRE_FLAGS])
	391	flags = rta_getattr_u32(tb[IFLA_GRE_FLAGS]);
	392
	393	if (tb[IFLA_GRE_FLOWINFO])
35893864	394	flowinfo = rta_getattr_u32(tb[IFLA_GRE_FLOWINFO]);
af89576d	395
	396	if (tb[IFLA_GRE_REMOTE]) {
	397	struct in6_addr addr;
56f5daac	398
af89576d	399	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_REMOTE]), sizeof(addr));
	400
	401	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	402	remote = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	403	}
af89576d	404
6856fb65	405	print_string(PRINT_ANY, "remote", "remote %s ", remote);
af89576d	406
	407	if (tb[IFLA_GRE_LOCAL]) {
	408	struct in6_addr addr;
56f5daac	409
af89576d	410	memcpy(&addr, RTA_DATA(tb[IFLA_GRE_LOCAL]), sizeof(addr));
	411
	412	if (memcmp(&addr, &in6_addr_any, sizeof(addr)))
a418e451	413	local = format_host(AF_INET6, sizeof(addr), &addr);
af89576d	414	}
af89576d	415
6856fb65	416	print_string(PRINT_ANY, "local", "local %s ", local);
af89576d	417
af89576d	418	if (tb[IFLA_GRE_LINK] && rta_getattr_u32(tb[IFLA_GRE_LINK])) {
56f5daac	419	unsigned int link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
af89576d	420	const char *n = if_indextoname(link, s2);
	421
	422	if (n)
6856fb65	423	print_string(PRINT_ANY, "link", "dev %s ", n);
af89576d	424	else
6856fb65	425	print_uint(PRINT_ANY, "link_index", "dev %u ", link);
af89576d	426	}
af89576d	427
6856fb65 JF	428	if (tb[IFLA_GRE_TTL]) {
	429	__u8 ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
	430
	431	if (ttl)
	432	print_int(PRINT_ANY, "ttl", "hoplimit %d ", ttl);
	433	else
	434	print_int(PRINT_JSON, "ttl", NULL, ttl);
	435	}
af89576d	436
af89576d	437	if (flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
6856fb65 JF	438	print_bool(PRINT_ANY,
	439	"ip6_tnl_f_ign_encap_limit",
	440	"encaplimit none ",
	441	true);
af89576d	442	else if (tb[IFLA_GRE_ENCAP_LIMIT]) {
	443	int encap_limit = rta_getattr_u8(tb[IFLA_GRE_ENCAP_LIMIT]);
	444
6856fb65 JF	445	print_int(PRINT_ANY,
	446	"encap_limit",
	447	"encaplimit %d ",
	448	encap_limit);
af89576d	449	}
af89576d	450
6856fb65 JF	451	if (flags & IP6_TNL_F_USE_ORIG_FLOWLABEL) {
	452	print_bool(PRINT_ANY,
	453	"ip6_tnl_f_use_orig_flowlabel",
	454	"flowlabel inherit ",
	455	true);
	456	} else {
	457	if (is_json_context()) {
	458	SPRINT_BUF(b1);
	459
	460	snprintf(b1, sizeof(b1), "0x%05x",
	461	ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
	462	print_string(PRINT_JSON, "flowlabel", NULL, b1);
	463
	464	} else {
	465	fprintf(f, "flowlabel 0x%05x ",
	466	ntohl(flowinfo & IP6_FLOWINFO_FLOWLABEL));
	467	}
	468	}
af89576d	469
2e706e12 SH	470	if (flags & IP6_TNL_F_USE_ORIG_TCLASS) {
	471	print_bool(PRINT_ANY,
	472	"ip6_tnl_f_use_orig_tclass",
	473	"tclass inherit ",
	474	true);
	475	} else {
	476	if (is_json_context()) {
	477	SPRINT_BUF(b1);
	478
	479	snprintf(b1, sizeof(b1), "0x%05x",
	480	ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20);
	481	print_string(PRINT_JSON, "tclass", NULL, b1);
	482	} else {
	483	fprintf(f, "tclass 0x%02x ",
	484	ntohl(flowinfo & IP6_FLOWINFO_TCLASS) >> 20);
	485	}
	486	}
af89576d	487
af89576d	488	if (flags & IP6_TNL_F_RCV_DSCP_COPY)
6856fb65 JF	489	print_bool(PRINT_ANY,
	490	"ip6_tnl_f_rcv_dscp_copy",
	491	"dscp inherit ",
	492	true);
af89576d	493
	494	if (tb[IFLA_GRE_IFLAGS])
	495	iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
	496
	497	if (tb[IFLA_GRE_OFLAGS])
	498	oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
	499
	500	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
	501	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
6856fb65	502	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
af89576d	503	}
	504
	505	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
	506	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
6856fb65	507	print_string(PRINT_ANY, "okey", "okey %s ", s2);
af89576d	508	}
	509
	510	if (iflags & GRE_SEQ)
6856fb65	511	print_bool(PRINT_ANY, "iseq", "iseq ", true);
af89576d	512	if (oflags & GRE_SEQ)
6856fb65	513	print_bool(PRINT_ANY, "oseq", "oseq ", true);
af89576d	514	if (iflags & GRE_CSUM)
6856fb65	515	print_bool(PRINT_ANY, "icsum", "icsum ", true);
af89576d	516	if (oflags & GRE_CSUM)
6856fb65	517	print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
0b2fbb73	518
ad4b1425	519	if (flags & IP6_TNL_F_USE_ORIG_FWMARK)
6856fb65 JF	520	print_bool(PRINT_ANY,
	521	"ip6_tnl_f_use_orig_fwmark",
	522	"fwmark inherit ",
	523	true);
	524	else if (tb[IFLA_GRE_FWMARK]) {
	525	__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
	526
	527	if (fwmark) {
	528	snprintf(s2, sizeof(s2), "0x%x", fwmark);
	529
	530	print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
	531	}
	532	}
ad4b1425	533
8595cc40 WT	534	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
	535	__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
	536	fprintf(f, "erspan_index %u ", erspan_idx);
	537	}
	538
0b2fbb73 TH	539	if (tb[IFLA_GRE_ENCAP_TYPE] &&
	540	rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
	541	__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
	542	__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
	543	__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
	544	__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);
	545
6856fb65 JF	546	open_json_object("encap");
	547
	548	print_string(PRINT_FP, NULL, "encap ", NULL);
0b2fbb73 TH	549	switch (type) {
0b2fbb73 TH	550	case TUNNEL_ENCAP_FOU:
6856fb65	551	print_string(PRINT_ANY, "type", "%s ", "fou");
0b2fbb73 TH	552	break;
0b2fbb73 TH	553	case TUNNEL_ENCAP_GUE:
6856fb65	554	print_string(PRINT_ANY, "type", "%s ", "gue");
0b2fbb73 TH	555	break;
0b2fbb73 TH	556	default:
6856fb65	557	print_null(PRINT_ANY, "type", "unknown ", NULL);
0b2fbb73 TH	558	break;
	559	}
	560
6856fb65 JF	561	if (is_json_context()) {
	562	print_uint(PRINT_JSON,
	563	"sport",
	564	NULL,
	565	sport ? ntohs(sport) : 0);
	566	print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));
	567	print_bool(PRINT_JSON, "csum", NULL,
	568	flags & TUNNEL_ENCAP_FLAG_CSUM);
	569	print_bool(PRINT_JSON, "csum6", NULL,
	570	flags & TUNNEL_ENCAP_FLAG_CSUM6);
	571	print_bool(PRINT_JSON, "remcsum", NULL,
	572	flags & TUNNEL_ENCAP_FLAG_REMCSUM);
	573	close_json_object();
	574	} else {
	575	if (sport == 0)
	576	fputs("encap-sport auto ", f);
	577	else
	578	fprintf(f, "encap-sport %u", ntohs(sport));
0b2fbb73	579
6856fb65	580	fprintf(f, "encap-dport %u ", ntohs(dport));
0b2fbb73	581
6856fb65 JF	582	if (flags & TUNNEL_ENCAP_FLAG_CSUM)
	583	fputs("encap-csum ", f);
	584	else
	585	fputs("noencap-csum ", f);
0b2fbb73	586
6856fb65 JF	587	if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
	588	fputs("encap-csum6 ", f);
	589	else
	590	fputs("noencap-csum6 ", f);
0b2fbb73	591
6856fb65 JF	592	if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
	593	fputs("encap-remcsum ", f);
	594	else
	595	fputs("noencap-remcsum ", f);
	596	}
0b2fbb73	597	}
af89576d	598	}
af89576d	599
561e650e	600	static void gre_print_help(struct link_util lu, int argc, char *argv,
	601	FILE *f)
	602	{
	603	print_usage(f);
	604	}
	605
af89576d	606	struct link_util ip6gre_link_util = {
	607	.id = "ip6gre",
	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	};
	613
	614	struct link_util ip6gretap_link_util = {
	615	.id = "ip6gretap",
	616	.maxattr = IFLA_GRE_MAX,
	617	.parse_opt = gre_parse_opt,
	618	.print_opt = gre_print_opt,
561e650e	619	.print_help = gre_print_help,
af89576d	620	};
8595cc40 WT	621
	622	struct link_util ip6erspan_link_util = {
	623	.id = "ip6erspan",
	624	.maxattr = IFLA_GRE_MAX,
	625	.parse_opt = gre_parse_opt,
	626	.print_opt = gre_print_opt,
	627	.print_help = gre_print_help,
	628	};