[mirror_iproute2.git] / ip / link_vti.c

/*
 * link_vti.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
 */

#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: ... vti [ remote ADDR ]\n"
		"               [ local ADDR ]\n"
		"               [ [i|o]key KEY ]\n"
		"               [ dev PHYS_DEV ]\n"
		"               [ fwmark MARK ]\n"
		"\n"
		"Where: ADDR := { IP_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 vti_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;
		char buf[1024];
	} 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 rtattr *tb[IFLA_MAX + 1];
	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
	unsigned int ikey = 0;
	unsigned int okey = 0;
	unsigned int saddr = 0;
	unsigned int daddr = 0;
	unsigned int link = 0;
	unsigned int fwmark = 0;
	int len;

	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
		if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
get_failed:
			fprintf(stderr,
				"Failed to get existing tunnel info.\n");
			return -1;
		}

		len = req.n.nlmsg_len;
		len -= NLMSG_LENGTH(sizeof(*ifi));
		if (len < 0)
			goto get_failed;

		parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), 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])
			saddr = rta_getattr_u32(vtiinfo[IFLA_VTI_LOCAL]);

		if (vtiinfo[IFLA_VTI_REMOTE])
			daddr = rta_getattr_u32(vtiinfo[IFLA_VTI_REMOTE]);

		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]);
	}

	while (argc > 0) {
		if (!matches(*argv, "key")) {
			unsigned int uval;

			NEXT_ARG();
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr,
						"Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
					exit(-1);
				}
				uval = htonl(uval);
			}

			ikey = okey = uval;
		} else if (!matches(*argv, "ikey")) {
			unsigned int uval;

			NEXT_ARG();
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
					exit(-1);
				}
				uval = htonl(uval);
			}
			ikey = uval;
		} else if (!matches(*argv, "okey")) {
			unsigned int uval;

			NEXT_ARG();
			if (strchr(*argv, '.'))
				uval = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0) < 0) {
					fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
					exit(-1);
				}
				uval = htonl(uval);
			}
			okey = uval;
		} else if (!matches(*argv, "remote")) {
			NEXT_ARG();
			if (!strcmp(*argv, "any")) {
				fprintf(stderr, "invalid value for \"remote\": \"%s\"\n", *argv);
				exit(-1);
			} else {
				daddr = get_addr32(*argv);
			}
		} else if (!matches(*argv, "local")) {
			NEXT_ARG();
			if (!strcmp(*argv, "any")) {
				fprintf(stderr, "invalid value for \"local\": \"%s\"\n", *argv);
				exit(-1);
			} else {
				saddr = get_addr32(*argv);
			}
		} 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, 4);
	addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, 4);
	addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
	if (link)
		addattr32(n, 1024, IFLA_VTI_LINK, link);

	return 0;
}

static void vti_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
	const char *local = "any";
	const char *remote = "any";
	__u32 key;
	unsigned int link;
	char s2[IFNAMSIZ];

	if (!tb)
		return;

	if (tb[IFLA_VTI_REMOTE]) {
		unsigned int addr = rta_getattr_u32(tb[IFLA_VTI_REMOTE]);

		if (addr)
			remote = format_host(AF_INET, 4, &addr);
	}

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

	if (tb[IFLA_VTI_LOCAL]) {
		unsigned int addr = rta_getattr_u32(tb[IFLA_VTI_LOCAL]);

		if (addr)
			local = format_host(AF_INET, 4, &addr);
	}

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

	if (tb[IFLA_VTI_LINK] &&
	    (link = rta_getattr_u32(tb[IFLA_VTI_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_VTI_IKEY] &&
	    (key = rta_getattr_u32(tb[IFLA_VTI_IKEY])))
		print_0xhex(PRINT_ANY, "ikey", "ikey %#x ", ntohl(key));


	if (tb[IFLA_VTI_OKEY] &&
	    (key = rta_getattr_u32(tb[IFLA_VTI_OKEY])))
		print_0xhex(PRINT_ANY, "okey", "okey %#x ", ntohl(key));

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

		if (fwmark) {
			SPRINT_BUF(b1);

			snprintf(b1, sizeof(b1), "0x%x", fwmark);
			print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
		}
	}
}

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

struct link_util vti_link_util = {
	.id = "vti",
	.maxattr = IFLA_VTI_MAX,
	.parse_opt = vti_parse_opt,
	.print_opt = vti_print_opt,
	.print_help = vti_print_help,
};
Commit	Line	Data
73579339 S	1	/*
	2	* link_vti.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	*/
	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 "rt_names.h"
	22	#include "utils.h"
	23	#include "ip_common.h"
	24	#include "tunnel.h"
	25
	26
561e650e	27	static void print_usage(FILE *f)
561e650e	28	{
8b471354 PS	29	fprintf(f,
	30	"Usage: ... vti [ remote ADDR ]\n"
	31	" [ local ADDR ]\n"
	32	" [ [i\|o]key KEY ]\n"
	33	" [ dev PHYS_DEV ]\n"
ad4b1425	34	" [ fwmark MARK ]\n"
8b471354 PS	35	"\n"
	36	"Where: ADDR := { IP_ADDRESS }\n"
	37	" KEY := { DOTTED_QUAD \| NUMBER }\n"
ad4b1425	38	" MARK := { 0x0..0xffffffff }\n"
8b471354	39	);
561e650e	40	}
561e650e	41
73579339 S	42	static void usage(void) __attribute__((noreturn));
	43	static void usage(void)
	44	{
561e650e	45	print_usage(stderr);
73579339 S	46	exit(-1);
	47	}
	48
	49	static int vti_parse_opt(struct link_util lu, int argc, char *argv,
	50	struct nlmsghdr *n)
	51	{
d17b136f	52	struct ifinfomsg ifi = (struct ifinfomsg )(n + 1);
73579339 S	53	struct {
	54	struct nlmsghdr n;
	55	struct ifinfomsg i;
	56	char buf[1024];
d17b136f PS	57	} req = {
	58	.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
	59	.n.nlmsg_flags = NLM_F_REQUEST,
	60	.n.nlmsg_type = RTM_GETLINK,
	61	.i.ifi_family = preferred_family,
	62	.i.ifi_index = ifi->ifi_index,
	63	};
73579339 S	64	struct rtattr *tb[IFLA_MAX + 1];
	65	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
	66	struct rtattr *vtiinfo[IFLA_VTI_MAX + 1];
56f5daac SH	67	unsigned int ikey = 0;
	68	unsigned int okey = 0;
	69	unsigned int saddr = 0;
	70	unsigned int daddr = 0;
	71	unsigned int link = 0;
ad4b1425	72	unsigned int fwmark = 0;
73579339 S	73	int len;
	74
	75	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
c079e121	76	if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) {
73579339 S	77	get_failed:
	78	fprintf(stderr,
	79	"Failed to get existing tunnel info.\n");
	80	return -1;
	81	}
	82
	83	len = req.n.nlmsg_len;
	84	len -= NLMSG_LENGTH(sizeof(*ifi));
	85	if (len < 0)
	86	goto get_failed;
	87
	88	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len);
	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])
9f1370c0	102	ikey = rta_getattr_u32(vtiinfo[IFLA_VTI_IKEY]);
73579339 S	103
73579339 S	104	if (vtiinfo[IFLA_VTI_OKEY])
9f1370c0	105	okey = rta_getattr_u32(vtiinfo[IFLA_VTI_OKEY]);
73579339 S	106
73579339 S	107	if (vtiinfo[IFLA_VTI_LOCAL])
9f1370c0	108	saddr = rta_getattr_u32(vtiinfo[IFLA_VTI_LOCAL]);
73579339 S	109
73579339 S	110	if (vtiinfo[IFLA_VTI_REMOTE])
9f1370c0	111	daddr = rta_getattr_u32(vtiinfo[IFLA_VTI_REMOTE]);
73579339 S	112
73579339 S	113	if (vtiinfo[IFLA_VTI_LINK])
9f1370c0	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]);
73579339 S	118	}
	119
	120	while (argc > 0) {
	121	if (!matches(*argv, "key")) {
56f5daac	122	unsigned int uval;
73579339 S	123
	124	NEXT_ARG();
	125	if (strchr(*argv, '.'))
	126	uval = get_addr32(*argv);
	127	else {
	128	if (get_unsigned(&uval, *argv, 0) < 0) {
	129	fprintf(stderr,
14645ec2	130	"Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv);
73579339 S	131	exit(-1);
	132	}
	133	uval = htonl(uval);
	134	}
	135
	136	ikey = okey = uval;
	137	} else if (!matches(*argv, "ikey")) {
56f5daac	138	unsigned int uval;
73579339 S	139
	140	NEXT_ARG();
	141	if (strchr(*argv, '.'))
	142	uval = get_addr32(*argv);
	143	else {
	144	if (get_unsigned(&uval, *argv, 0) < 0) {
14645ec2	145	fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv);
73579339 S	146	exit(-1);
	147	}
	148	uval = htonl(uval);
	149	}
	150	ikey = uval;
	151	} else if (!matches(*argv, "okey")) {
56f5daac	152	unsigned int uval;
73579339 S	153
	154	NEXT_ARG();
	155	if (strchr(*argv, '.'))
	156	uval = get_addr32(*argv);
	157	else {
	158	if (get_unsigned(&uval, *argv, 0) < 0) {
14645ec2	159	fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv);
73579339 S	160	exit(-1);
	161	}
	162	uval = htonl(uval);
	163	}
	164	okey = uval;
	165	} else if (!matches(*argv, "remote")) {
	166	NEXT_ARG();
	167	if (!strcmp(*argv, "any")) {
14645ec2	168	fprintf(stderr, "invalid value for \"remote\": \"%s\"\n", *argv);
73579339 S	169	exit(-1);
	170	} else {
	171	daddr = get_addr32(*argv);
	172	}
	173	} else if (!matches(*argv, "local")) {
	174	NEXT_ARG();
	175	if (!strcmp(*argv, "any")) {
14645ec2	176	fprintf(stderr, "invalid value for \"local\": \"%s\"\n", *argv);
73579339 S	177	exit(-1);
	178	} else {
	179	saddr = get_addr32(*argv);
	180	}
	181	} else if (!matches(*argv, "dev")) {
	182	NEXT_ARG();
	183	link = if_nametoindex(*argv);
0cb6bb51 CW	184	if (link == 0) {
	185	fprintf(stderr, "Cannot find device \"%s\"\n",
	186	*argv);
73579339	187	exit(-1);
0cb6bb51	188	}
ad4b1425 CG	189	} else if (strcmp(*argv, "fwmark") == 0) {
	190	NEXT_ARG();
	191	if (get_u32(&fwmark, *argv, 0))
	192	invarg("invalid fwmark\n", *argv);
73579339 S	193	} else
	194	usage();
	195	argc--; argv++;
	196	}
	197
	198	addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
	199	addattr32(n, 1024, IFLA_VTI_OKEY, okey);
	200	addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, 4);
	201	addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, 4);
ad4b1425	202	addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
73579339 S	203	if (link)
	204	addattr32(n, 1024, IFLA_VTI_LINK, link);
	205
	206	return 0;
	207	}
	208
	209	static void vti_print_opt(struct link_util lu, FILE f, struct rtattr *tb[])
	210	{
73579339 S	211	const char *local = "any";
73579339 S	212	const char *remote = "any";
fcfcc40b	213	__u32 key;
9f1370c0	214	unsigned int link;
fcfcc40b	215	char s2[IFNAMSIZ];
73579339 S	216
	217	if (!tb)
	218	return;
	219
	220	if (tb[IFLA_VTI_REMOTE]) {
9f1370c0	221	unsigned int addr = rta_getattr_u32(tb[IFLA_VTI_REMOTE]);
73579339 S	222
73579339 S	223	if (addr)
a418e451	224	remote = format_host(AF_INET, 4, &addr);
73579339 S	225	}
73579339 S	226
4c42a1c1	227	print_string(PRINT_ANY, "remote", "remote %s ", remote);
73579339 S	228
73579339 S	229	if (tb[IFLA_VTI_LOCAL]) {
9f1370c0	230	unsigned int addr = rta_getattr_u32(tb[IFLA_VTI_LOCAL]);
73579339 S	231
73579339 S	232	if (addr)
a418e451	233	local = format_host(AF_INET, 4, &addr);
73579339 S	234	}
73579339 S	235
4c42a1c1	236	print_string(PRINT_ANY, "local", "local %s ", local);
73579339	237
9f1370c0 SH	238	if (tb[IFLA_VTI_LINK] &&
9f1370c0 SH	239	(link = rta_getattr_u32(tb[IFLA_VTI_LINK]))) {
73579339 S	240	const char *n = if_indextoname(link, s2);
	241
	242	if (n)
4c42a1c1	243	print_string(PRINT_ANY, "link", "dev %s ", n);
73579339	244	else
4c42a1c1	245	print_uint(PRINT_ANY, "link_index", "dev %u ", link);
73579339 S	246	}
73579339 S	247
fcfcc40b SH	248	if (tb[IFLA_VTI_IKEY] &&
fcfcc40b SH	249	(key = rta_getattr_u32(tb[IFLA_VTI_IKEY])))
4c42a1c1	250	print_0xhex(PRINT_ANY, "ikey", "ikey %#x ", ntohl(key));
73579339	251
fcfcc40b SH	252
	253	if (tb[IFLA_VTI_OKEY] &&
	254	(key = rta_getattr_u32(tb[IFLA_VTI_OKEY])))
4c42a1c1	255	print_0xhex(PRINT_ANY, "okey", "okey %#x ", ntohl(key));
ad4b1425	256
4c42a1c1 JF	257	if (tb[IFLA_VTI_FWMARK]) {
	258	__u32 fwmark = rta_getattr_u32(tb[IFLA_VTI_FWMARK]);
	259
	260	if (fwmark) {
	261	SPRINT_BUF(b1);
	262
	263	snprintf(b1, sizeof(b1), "0x%x", fwmark);
	264	print_string(PRINT_ANY, "fwmark", "fwmark %s ", s2);
	265	}
ad4b1425	266	}
73579339 S	267	}
73579339 S	268
561e650e	269	static void vti_print_help(struct link_util lu, int argc, char *argv,
	270	FILE *f)
	271	{
	272	print_usage(f);
	273	}
	274
73579339 S	275	struct link_util vti_link_util = {
	276	.id = "vti",
	277	.maxattr = IFLA_VTI_MAX,
	278	.parse_opt = vti_parse_opt,
	279	.print_opt = vti_print_opt,
561e650e	280	.print_help = vti_print_help,
73579339	281	};