[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 print_usage(FILE *f)
{
	fprintf(f,
		"Usage: ... vti6 [ remote ADDR ]\n"
		"                [ local ADDR ]\n"
		"                [ [i|o]key KEY ]\n"
		"                [ dev PHYS_DEV ]\n"
		"                [ fwmark MARK ]\n"
		"\n"
		"Where: ADDR := { IPV6_ADDRESS }\n"
		"       KEY  := { DOTTED_QUAD | NUMBER }\n"
		"       MARK := { 0x0..0xffffffff }\n"
	);
}

static void usage(void) __attribute__((noreturn));
static void usage(void)
{
	print_usage(stderr);
	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) {
				fprintf(stderr, "Cannot find device \"%s\"\n",
					*argv);
				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]) {
		struct rtattr *rta = tb[IFLA_VTI_IKEY];
		__u32 key = rta_getattr_u32(rta);

		if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2)))
			print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
	}

	if (tb[IFLA_VTI_OKEY]) {
		struct rtattr *rta = tb[IFLA_VTI_OKEY];
		__u32 key = rta_getattr_u32(rta);

		if (key && inet_ntop(AF_INET, RTA_DATA(rta), 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) {
			print_0xhex(PRINT_ANY,
				    "fwmark", "fwmark 0x%x ", fwmark);
		}
	}
}

static void vti6_print_help(struct link_util *lu, int argc, char **argv,
	FILE *f)
{
	print_usage(f);
}

struct link_util vti6_link_util = {
	.id = "vti6",
	.maxattr = IFLA_VTI_MAX,
	.parse_opt = vti6_parse_opt,
	.print_opt = vti6_print_opt,
	.print_help = vti6_print_help,
};
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
b8dc6c5b SP	27	static void print_usage(FILE *f)
	28	{
	29	fprintf(f,
	30	"Usage: ... vti6 [ remote ADDR ]\n"
	31	" [ local ADDR ]\n"
	32	" [ [i\|o]key KEY ]\n"
	33	" [ dev PHYS_DEV ]\n"
	34	" [ fwmark MARK ]\n"
	35	"\n"
	36	"Where: ADDR := { IPV6_ADDRESS }\n"
	37	" KEY := { DOTTED_QUAD \| NUMBER }\n"
	38	" MARK := { 0x0..0xffffffff }\n"
	39	);
	40	}
2f7fbec2 SK	41
	42	static void usage(void) __attribute__((noreturn));
	43	static void usage(void)
	44	{
b8dc6c5b	45	print_usage(stderr);
2f7fbec2 SK	46	exit(-1);
	47	}
	48
	49	static int vti6_parse_opt(struct link_util lu, int argc, char *argv,
	50	struct nlmsghdr *n)
	51	{
d17b136f	52	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
2f7fbec2 SK	53	struct {
	54	struct nlmsghdr n;
	55	struct ifinfomsg i;
d17b136f PS	56	} req = {
	57	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	58	.n.nlmsg_flags = NLM_F_REQUEST,
	59	.n.nlmsg_type = RTM_GETLINK,
	60	.i.ifi_family = preferred_family,
	61	.i.ifi_index = ifi->ifi_index,
	62	};
08ede25f	63	struct nlmsghdr *answer;
2f7fbec2 SK	64	struct rtattr *tb[IFLA_MAX + 1];
	65	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	66	struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
2a80154f SH	67	struct in6_addr saddr = IN6ADDR_ANY_INIT;
2a80154f SH	68	struct in6_addr daddr = IN6ADDR_ANY_INIT;
1f44b937 SP	69	__be32 ikey = 0;
1f44b937 SP	70	__be32 okey = 0;
56f5daac	71	unsigned int link = 0;
ad4b1425	72	__u32 fwmark = 0;
2f7fbec2 SK	73	int len;
	74
	75	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
86bf43c7	76	if (rtnl_talk(&rth, &req.n, &answer) < 0) {
2f7fbec2 SK	77	get_failed:
	78	fprintf(stderr,
	79	"Failed to get existing tunnel info.\n");
	80	return -1;
	81	}
	82
86bf43c7	83	len = answer->nlmsg_len;
2f7fbec2 SK	84	len -= NLMSG_LENGTH(sizeof(*ifi));
	85	if (len < 0)
	86	goto get_failed;
	87
86bf43c7	88	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
2f7fbec2 SK	89
	90	if (!tb[IFLA_LINKINFO])
	91	goto get_failed;
	92
	93	parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
	94
	95	if (!linkinfo[IFLA_INFO_DATA])
	96	goto get_failed;
	97
	98	parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX,
	99	linkinfo[IFLA_INFO_DATA]);
	100
	101	if (vtiinfo[IFLA_VTI_IKEY])
	102	ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]);
	103
	104	if (vtiinfo[IFLA_VTI_OKEY])
	105	okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]);
	106
	107	if (vtiinfo[IFLA_VTI_LOCAL])
	108	memcpy(&saddr, RTA_DATA(vtiinfo[IFLA_VTI_LOCAL]), sizeof(saddr));
	109
	110	if (vtiinfo[IFLA_VTI_REMOTE])
	111	memcpy(&daddr, RTA_DATA(vtiinfo[IFLA_VTI_REMOTE]), sizeof(daddr));
	112
	113	if (vtiinfo[IFLA_VTI_LINK])
	114	link = rta_getattr_u8(vtiinfo[IFLA_VTI_LINK]);
ad4b1425 CG	115
	116	if (vtiinfo[IFLA_VTI_FWMARK])
	117	fwmark = rta_getattr_u32(vtiinfo[IFLA_VTI_FWMARK]);
86bf43c7 HL	118
86bf43c7 HL	119	free(answer);
2f7fbec2 SK	120	}
	121
	122	while (argc > 0) {
	123	if (!matches(*argv, "key")) {
2f7fbec2	124	NEXT_ARG();
1f44b937	125	ikey = okey = tnl_parse_key("key", *argv);
2f7fbec2	126	} else if (!matches(*argv, "ikey")) {
2f7fbec2	127	NEXT_ARG();
1f44b937	128	ikey = tnl_parse_key("ikey", *argv);
2f7fbec2	129	} else if (!matches(*argv, "okey")) {
2f7fbec2	130	NEXT_ARG();
1f44b937	131	okey = tnl_parse_key("okey", *argv);
2f7fbec2	132	} else if (!matches(*argv, "remote")) {
57daab1e	133	inet_prefix addr;
56f5daac	134
2f7fbec2	135	NEXT_ARG();
9aceaad7 SP	136	get_addr(&addr, *argv, AF_INET6);
9aceaad7 SP	137	memcpy(&daddr, addr.data, sizeof(daddr));
57daab1e SP	138	} else if (!matches(*argv, "local")) {
57daab1e SP	139	inet_prefix addr;
56f5daac	140
57daab1e	141	NEXT_ARG();
9aceaad7 SP	142	get_addr(&addr, *argv, AF_INET6);
9aceaad7 SP	143	memcpy(&saddr, addr.data, sizeof(saddr));
2f7fbec2 SK	144	} else if (!matches(*argv, "dev")) {
	145	NEXT_ARG();
	146	link = if_nametoindex(*argv);
9dc04a4f SP	147	if (link == 0) {
	148	fprintf(stderr, "Cannot find device \"%s\"\n",
	149	*argv);
2f7fbec2	150	exit(-1);
9dc04a4f	151	}
ad4b1425 CG	152	} else if (strcmp(*argv, "fwmark") == 0) {
	153	NEXT_ARG();
	154	if (get_u32(&fwmark, *argv, 0))
	155	invarg("invalid fwmark\n", *argv);
2f7fbec2 SK	156	} else
	157	usage();
	158	argc--; argv++;
	159	}
	160
	161	addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
	162	addattr32(n, 1024, IFLA_VTI_OKEY, okey);
560cf612 SP	163	addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, sizeof(saddr));
560cf612 SP	164	addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, sizeof(daddr));
ad4b1425	165	addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
2f7fbec2 SK	166	if (link)
	167	addattr32(n, 1024, IFLA_VTI_LINK, link);
	168
	169	return 0;
	170	}
	171
	172	static void vti6_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	173	{
2f7fbec2 SK	174	const char *local = "any";
	175	const char *remote = "any";
	176	struct in6_addr saddr;
	177	struct in6_addr daddr;
9f1370c0	178	char s2[64];
2f7fbec2 SK	179
	180	if (!tb)
	181	return;
	182
	183	if (tb[IFLA_VTI_REMOTE]) {
	184	memcpy(&daddr, RTA_DATA(tb[IFLA_VTI_REMOTE]), sizeof(daddr));
	185
a418e451	186	remote = format_host(AF_INET6, 16, &daddr);
2f7fbec2 SK	187	}
2f7fbec2 SK	188
063dd06c	189	print_string(PRINT_ANY, "remote", "remote %s ", remote);
2f7fbec2 SK	190
	191	if (tb[IFLA_VTI_LOCAL]) {
	192	memcpy(&saddr, RTA_DATA(tb[IFLA_VTI_LOCAL]), sizeof(saddr));
	193
a418e451	194	local = format_host(AF_INET6, 16, &saddr);
2f7fbec2 SK	195	}
2f7fbec2 SK	196
063dd06c	197	print_string(PRINT_ANY, "local", "local %s ", local);
2f7fbec2	198
45d3a6ef SP	199	if (tb[IFLA_VTI_LINK]) {
45d3a6ef SP	200	unsigned int link = rta_getattr_u32(tb[IFLA_VTI_LINK]);
2f7fbec2	201
45d3a6ef SP	202	if (link) {
	203	print_string(PRINT_ANY, "link", "dev %s ",
	204	ll_index_to_name(link));
	205	}
2f7fbec2 SK	206	}
	207
	208	if (tb[IFLA_VTI_IKEY]) {
34a8c54d SP	209	struct rtattr *rta = tb[IFLA_VTI_IKEY];
	210	__u32 key = rta_getattr_u32(rta);
	211
	212	if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2)))
	213	print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
2f7fbec2 SK	214	}
	215
	216	if (tb[IFLA_VTI_OKEY]) {
34a8c54d SP	217	struct rtattr *rta = tb[IFLA_VTI_OKEY];
	218	__u32 key = rta_getattr_u32(rta);
	219
	220	if (key && inet_ntop(AF_INET, RTA_DATA(rta), s2, sizeof(s2)))
	221	print_string(PRINT_ANY, "okey", "okey %s ", s2);
2f7fbec2	222	}
ad4b1425	223
063dd06c JF	224	if (tb[IFLA_VTI_FWMARK]) {
	225	__u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]);
	226
	227	if (fwmark) {
e97ad3d2 SP	228	print_0xhex(PRINT_ANY,
e97ad3d2 SP	229	"fwmark", "fwmark 0x%x ", fwmark);
063dd06c	230	}
ad4b1425	231	}
2f7fbec2 SK	232	}
2f7fbec2 SK	233
b8dc6c5b SP	234	static void vti6_print_help(struct link_util lu, int argc, char *argv,
	235	FILE *f)
	236	{
	237	print_usage(f);
	238	}
	239
2f7fbec2 SK	240	struct link_util vti6_link_util = {
	241	.id = "vti6",
	242	.maxattr = IFLA_VTI_MAX,
	243	.parse_opt = vti6_parse_opt,
	244	.print_opt = vti6_print_opt,
b8dc6c5b	245	.print_help = vti6_print_help,
2f7fbec2	246	};