[mirror_iproute2.git] / ip / link_vti6.c

/*
 * link_vti6.c	VTI 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:	Herbert Xu <herbert@gondor.apana.org.au>
 *		Saurabh Mohan <saurabh.mohan@vyatta.com> Modified link_gre.c for VTI
 *		Steffen Klassert <steffen.klassert@secunet.com> Modified link_vti.c for IPv6
 */

#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 "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "tunnel.h"


static void usage(void) __attribute__((noreturn));
static void usage(void)
{
	fprintf(stderr, "Usage: ip link { add | set | change | replace | del } NAME\n");
	fprintf(stderr, "          type { vti6 } [ remote ADDR ] [ local ADDR ]\n");
	fprintf(stderr, "          [ [i|o]key KEY ]\n");
	fprintf(stderr, "          [ dev PHYS_DEV ]\n");
	fprintf(stderr, "          [ fwmark MARK ]\n");
	fprintf(stderr, "\n");
	fprintf(stderr, "Where: NAME := STRING\n");
	fprintf(stderr, "       ADDR := { IPV6_ADDRESS }\n");
	fprintf(stderr, "       KEY  := { DOTTED_QUAD | NUMBER }\n");
	fprintf(stderr, "       MARK := { 0x0..0xffffffff }\n");
	exit(-1);
}

static int vti6_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 *vtiinfo[IFLA_VTI_MAX + 1];
	struct in6_addr saddr = IN6ADDR_ANY_INIT;
	struct in6_addr daddr = IN6ADDR_ANY_INIT;
	__be32 ikey = 0;
	__be32 okey = 0;
	unsigned int link = 0;
	__u32 fwmark = 0;
	int len;

	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(vtiinfo, IFLA_VTI_MAX,
				    linkinfo[IFLA_INFO_DATA]);

		if (vtiinfo[IFLA_VTI_IKEY])
			ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]);

		if (vtiinfo[IFLA_VTI_OKEY])
			okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]);

		if (vtiinfo[IFLA_VTI_LOCAL])
			memcpy(&saddr, RTA_DATA(vtiinfo[IFLA_VTI_LOCAL]), sizeof(saddr));

		if (vtiinfo[IFLA_VTI_REMOTE])
			memcpy(&daddr, RTA_DATA(vtiinfo[IFLA_VTI_REMOTE]), sizeof(daddr));

		if (vtiinfo[IFLA_VTI_LINK])
			link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]);

		if (vtiinfo[IFLA_VTI_FWMARK])
			fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]);

		free(answer);
	}

	while (argc > 0) {
		if (!matches(*argv, "key")) {
			NEXT_ARG();
			ikey = okey = tnl_parse_key("key", *argv);
		} else if (!matches(*argv, "ikey")) {
			NEXT_ARG();
			ikey = tnl_parse_key("ikey", *argv);
		} else if (!matches(*argv, "okey")) {
			NEXT_ARG();
			okey = tnl_parse_key("okey", *argv);
		} else if (!matches(*argv, "remote")) {
			inet_prefix addr;

			NEXT_ARG();
			get_addr(&addr, *argv, AF_INET6);
			memcpy(&daddr, addr.data, sizeof(daddr));
		} else if (!matches(*argv, "local")) {
			inet_prefix addr;

			NEXT_ARG();
			get_addr(&addr, *argv, AF_INET6);
			memcpy(&saddr, addr.data, sizeof(saddr));
		} else if (!matches(*argv, "dev")) {
			NEXT_ARG();
			link = if_nametoindex(*argv);
			if (link == 0)
				exit(-1);
		} else if (strcmp(*argv, "fwmark") == 0) {
			NEXT_ARG();
			if (get_u32(&fwmark, *argv, 0))
				invarg("invalid fwmark\n", *argv);
		} else
			usage();
		argc--; argv++;
	}

	addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
	addattr32(n, 1024, IFLA_VTI_OKEY, okey);

	addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, sizeof(saddr));
	addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, sizeof(daddr));
	addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
	if (link)
		addattr32(n, 1024, IFLA_VTI_LINK, link);

	return 0;
}

static void vti6_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	const char *local = "any";
	const char *remote = "any";
	struct in6_addr saddr;
	struct in6_addr daddr;
	char s2[64];

	if (!tb)
		return;

	if (tb[IFLA_VTI_REMOTE]) {
		memcpy(&daddr, RTA_DATA(tb[IFLA_VTI_REMOTE]), sizeof(daddr));

		remote = format_host(AF_INET6, 16, &daddr);
	}

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

	if (tb[IFLA_VTI_LOCAL]) {
		memcpy(&saddr, RTA_DATA(tb[IFLA_VTI_LOCAL]), sizeof(saddr));

		local = format_host(AF_INET6, 16, &saddr);
	}

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

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

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

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

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

	if (tb[IFLA_VTI_FWMARK]) {
		__u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]);

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

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

struct link_util vti6_link_util = {
	.id = "vti6",
	.maxattr = IFLA_VTI_MAX,
	.parse_opt = vti6_parse_opt,
	.print_opt = vti6_print_opt,
};
Commit	Line	Data
2f7fbec2 SK	1	/*
	2	* link_vti6.c VTI 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: Herbert Xu <herbert@gondor.apana.org.au>
	10	* Saurabh Mohan <saurabh.mohan@vyatta.com> Modified link_gre.c for VTI
	11	* Steffen Klassert <steffen.klassert@secunet.com> Modified link_vti.c for IPv6
	12	*/
	13
	14	#include <string.h>
	15	#include <net/if.h>
	16	#include <sys/types.h>
	17	#include <sys/socket.h>
	18	#include <arpa/inet.h>
	19
	20	#include <linux/ip.h>
	21	#include <linux/if_tunnel.h>
	22	#include "rt_names.h"
	23	#include "utils.h"
	24	#include "ip_common.h"
	25	#include "tunnel.h"
	26
	27
	28	static void usage(void) __attribute__((noreturn));
	29	static void usage(void)
	30	{
	31	fprintf(stderr, "Usage: ip link { add \| set \| change \| replace \| del } NAME\n");
	32	fprintf(stderr, " type { vti6 } [ remote ADDR ] [ local ADDR ]\n");
	33	fprintf(stderr, " [ [i\|o]key KEY ]\n");
	34	fprintf(stderr, " [ dev PHYS_DEV ]\n");
ad4b1425	35	fprintf(stderr, " [ fwmark MARK ]\n");
2f7fbec2 SK	36	fprintf(stderr, "\n");
	37	fprintf(stderr, "Where: NAME := STRING\n");
	38	fprintf(stderr, " ADDR := { IPV6_ADDRESS }\n");
	39	fprintf(stderr, " KEY := { DOTTED_QUAD \| NUMBER }\n");
ad4b1425	40	fprintf(stderr, " MARK := { 0x0..0xffffffff }\n");
2f7fbec2 SK	41	exit(-1);
	42	}
	43
	44	static int vti6_parse_opt(struct link_util lu, int argc, char *argv,
	45	struct nlmsghdr *n)
	46	{
d17b136f	47	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
2f7fbec2 SK	48	struct {
	49	struct nlmsghdr n;
	50	struct ifinfomsg i;
d17b136f PS	51	} req = {
	52	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	53	.n.nlmsg_flags = NLM_F_REQUEST,
	54	.n.nlmsg_type = RTM_GETLINK,
	55	.i.ifi_family = preferred_family,
	56	.i.ifi_index = ifi->ifi_index,
	57	};
08ede25f	58	struct nlmsghdr *answer;
2f7fbec2 SK	59	struct rtattr *tb[IFLA_MAX + 1];
	60	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	61	struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
2a80154f SH	62	struct in6_addr saddr = IN6ADDR_ANY_INIT;
2a80154f SH	63	struct in6_addr daddr = IN6ADDR_ANY_INIT;
1f44b937 SP	64	__be32 ikey = 0;
1f44b937 SP	65	__be32 okey = 0;
56f5daac	66	unsigned int link = 0;
ad4b1425	67	__u32 fwmark = 0;
2f7fbec2 SK	68	int len;
	69
	70	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
86bf43c7	71	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
2f7fbec2 SK	72	get_failed:
	73	fprintf(stderr,
	74	"Failed to get existing tunnel info.\n");
	75	return -1;
	76	}
	77
86bf43c7	78	len = answer->nlmsg_len;
2f7fbec2 SK	79	len -= NLMSG_LENGTH(sizeof(*ifi));
	80	if (len < 0)
	81	goto get_failed;
	82
86bf43c7	83	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
2f7fbec2 SK	84
	85	if (!tb[IFLA_LINKINFO])
	86	goto get_failed;
	87
	88	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	89
	90	if (!linkinfo[IFLA_INFO_DATA])
	91	goto get_failed;
	92
	93	parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX,
	94	linkinfo[IFLA_INFO_DATA]);
	95
	96	if (vtiinfo[IFLA_VTI_IKEY])
	97	ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]);
	98
	99	if (vtiinfo[IFLA_VTI_OKEY])
	100	okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]);
	101
	102	if (vtiinfo[IFLA_VTI_LOCAL])
	103	memcpy(&saddr, RTA_DATA(vtiinfo[IFLA_VTI_LOCAL]), sizeof(saddr));
	104
	105	if (vtiinfo[IFLA_VTI_REMOTE])
	106	memcpy(&daddr, RTA_DATA(vtiinfo[IFLA_VTI_REMOTE]), sizeof(daddr));
	107
	108	if (vtiinfo[IFLA_VTI_LINK])
	109	link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]);
ad4b1425 CG	110
	111	if (vtiinfo[IFLA_VTI_FWMARK])
	112	fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]);
86bf43c7 HL	113
86bf43c7 HL	114	free(answer);
2f7fbec2 SK	115	}
	116
	117	while (argc > 0) {
	118	if (!matches(*argv, "key")) {
2f7fbec2	119	NEXT_ARG();
1f44b937	120	ikey = okey = tnl_parse_key("key", *argv);
2f7fbec2	121	} else if (!matches(*argv, "ikey")) {
2f7fbec2	122	NEXT_ARG();
1f44b937	123	ikey = tnl_parse_key("ikey", *argv);
2f7fbec2	124	} else if (!matches(*argv, "okey")) {
2f7fbec2	125	NEXT_ARG();
1f44b937	126	okey = tnl_parse_key("okey", *argv);
2f7fbec2	127	} else if (!matches(*argv, "remote")) {
57daab1e	128	inet_prefix addr;
56f5daac	129
2f7fbec2	130	NEXT_ARG();
9aceaad7 SP	131	get_addr(&addr, *argv, AF_INET6);
9aceaad7 SP	132	memcpy(&daddr, addr.data, sizeof(daddr));
57daab1e SP	133	} else if (!matches(*argv, "local")) {
57daab1e SP	134	inet_prefix addr;
56f5daac	135
57daab1e	136	NEXT_ARG();
9aceaad7 SP	137	get_addr(&addr, *argv, AF_INET6);
9aceaad7 SP	138	memcpy(&saddr, addr.data, sizeof(saddr));
2f7fbec2 SK	139	} else if (!matches(*argv, "dev")) {
	140	NEXT_ARG();
	141	link = if_nametoindex(*argv);
	142	if (link == 0)
	143	exit(-1);
ad4b1425 CG	144	} else if (strcmp(*argv, "fwmark") == 0) {
	145	NEXT_ARG();
	146	if (get_u32(&fwmark, *argv, 0))
	147	invarg("invalid fwmark\n", *argv);
2f7fbec2 SK	148	} else
	149	usage();
	150	argc--; argv++;
	151	}
	152
	153	addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
	154	addattr32(n, 1024, IFLA_VTI_OKEY, okey);
2a80154f	155
560cf612 SP	156	addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, sizeof(saddr));
560cf612 SP	157	addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, sizeof(daddr));
ad4b1425	158	addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
2f7fbec2 SK	159	if (link)
	160	addattr32(n, 1024, IFLA_VTI_LINK, link);
	161
	162	return 0;
	163	}
	164
	165	static void vti6_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	166	{
2f7fbec2 SK	167	const char *local = "any";
	168	const char *remote = "any";
	169	struct in6_addr saddr;
	170	struct in6_addr daddr;
9f1370c0	171	char s2[64];
2f7fbec2 SK	172
	173	if (!tb)
	174	return;
	175
	176	if (tb[IFLA_VTI_REMOTE]) {
	177	memcpy(&daddr, RTA_DATA(tb[IFLA_VTI_REMOTE]), sizeof(daddr));
	178
a418e451	179	remote = format_host(AF_INET6, 16, &daddr);
2f7fbec2 SK	180	}
2f7fbec2 SK	181
063dd06c	182	print_string(PRINT_ANY, "remote", "remote %s ", remote);
2f7fbec2 SK	183
	184	if (tb[IFLA_VTI_LOCAL]) {
	185	memcpy(&saddr, RTA_DATA(tb[IFLA_VTI_LOCAL]), sizeof(saddr));
	186
a418e451	187	local = format_host(AF_INET6, 16, &saddr);
2f7fbec2 SK	188	}
2f7fbec2 SK	189
063dd06c	190	print_string(PRINT_ANY, "local", "local %s ", local);
2f7fbec2	191
45d3a6ef SP	192	if (tb[IFLA_VTI_LINK]) {
45d3a6ef SP	193	unsigned int link = rta_getattr_u32(tb[IFLA_VTI_LINK]);
2f7fbec2	194
45d3a6ef SP	195	if (link) {
	196	print_string(PRINT_ANY, "link", "dev %s ",
	197	ll_index_to_name(link));
	198	}
2f7fbec2 SK	199	}
	200
	201	if (tb[IFLA_VTI_IKEY]) {
	202	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_IKEY]), s2, sizeof(s2));
063dd06c	203	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
2f7fbec2 SK	204	}
	205
	206	if (tb[IFLA_VTI_OKEY]) {
	207	inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_OKEY]), s2, sizeof(s2));
063dd06c	208	print_string(PRINT_ANY, "okey", "okey %s ", s2);
2f7fbec2	209	}
ad4b1425	210
063dd06c JF	211	if (tb[IFLA_VTI_FWMARK]) {
	212	__u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]);
	213
	214	if (fwmark) {
	215	snprintf(s2, sizeof(s2), "0x%x", fwmark);
	216
	217	print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
	218	}
ad4b1425	219	}
2f7fbec2 SK	220	}
	221
	222	struct link_util vti6_link_util = {
	223	.id = "vti6",
	224	.maxattr = IFLA_VTI_MAX,
	225	.parse_opt = vti6_parse_opt,
	226	.print_opt = vti6_print_opt,
	227	};