[mirror_iproute2.git] / ip / tunnel.c

/*
 * Copyright (C)2006 USAGI/WIDE Project
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses>.
 */
/*
 * split from ip_tunnel.c
 */
/*
 * Author:
 *	Masahide NAKAMURA @USAGI
 */

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>

#include "utils.h"
#include "tunnel.h"
#include "json_print.h"

const char *tnl_strproto(__u8 proto)
{
	switch (proto) {
	case IPPROTO_IPIP:
		return "ip";
	case IPPROTO_GRE:
		return "gre";
	case IPPROTO_IPV6:
		return "ipv6";
	case IPPROTO_ESP:
		return "esp";
	case IPPROTO_MPLS:
		return "mpls";
	case 0:
		return "any";
	default:
		return "unknown";
	}
}

int tnl_get_ioctl(const char *basedev, void *p)
{
	struct ifreq ifr;
	int fd;
	int err;

	strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
	ifr.ifr_ifru.ifru_data = (void *)p;

	fd = socket(preferred_family, SOCK_DGRAM, 0);
	if (fd < 0) {
		fprintf(stderr, "create socket failed: %s\n", strerror(errno));
		return -1;
	}

	err = ioctl(fd, SIOCGETTUNNEL, &ifr);
	if (err)
		fprintf(stderr, "get tunnel \"%s\" failed: %s\n", basedev,
			strerror(errno));

	close(fd);
	return err;
}

int tnl_add_ioctl(int cmd, const char *basedev, const char *name, void *p)
{
	struct ifreq ifr;
	int fd;
	int err;

	if (cmd == SIOCCHGTUNNEL && name[0])
		strncpy(ifr.ifr_name, name, IFNAMSIZ);
	else
		strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
	ifr.ifr_ifru.ifru_data = p;

	fd = socket(preferred_family, SOCK_DGRAM, 0);
	if (fd < 0) {
		fprintf(stderr, "create socket failed: %s\n", strerror(errno));
		return -1;
	}

	err = ioctl(fd, cmd, &ifr);
	if (err)
		fprintf(stderr, "add tunnel \"%s\" failed: %s\n", ifr.ifr_name,
			strerror(errno));
	close(fd);
	return err;
}

int tnl_del_ioctl(const char *basedev, const char *name, void *p)
{
	struct ifreq ifr;
	int fd;
	int err;

	if (name[0])
		strncpy(ifr.ifr_name, name, IFNAMSIZ);
	else
		strncpy(ifr.ifr_name, basedev, IFNAMSIZ);

	ifr.ifr_ifru.ifru_data = p;

	fd = socket(preferred_family, SOCK_DGRAM, 0);
	if (fd < 0) {
		fprintf(stderr, "create socket failed: %s\n", strerror(errno));
		return -1;
	}

	err = ioctl(fd, SIOCDELTUNNEL, &ifr);
	if (err)
		fprintf(stderr, "delete tunnel \"%s\" failed: %s\n",
			ifr.ifr_name, strerror(errno));
	close(fd);
	return err;
}

static int tnl_gen_ioctl(int cmd, const char *name,
			 void *p, int skiperr)
{
	struct ifreq ifr;
	int fd;
	int err;

	strncpy(ifr.ifr_name, name, IFNAMSIZ);
	ifr.ifr_ifru.ifru_data = p;

	fd = socket(preferred_family, SOCK_DGRAM, 0);
	if (fd < 0) {
		fprintf(stderr, "create socket failed: %s\n", strerror(errno));
		return -1;
	}

	err = ioctl(fd, cmd, &ifr);
	if (err && errno != skiperr)
		fprintf(stderr, "%s: ioctl %x failed: %s\n", name,
			cmd, strerror(errno));
	close(fd);
	return err;
}

int tnl_prl_ioctl(int cmd, const char *name, void *p)
{
	return tnl_gen_ioctl(cmd, name, p, -1);
}

int tnl_6rd_ioctl(int cmd, const char *name, void *p)
{
	return tnl_gen_ioctl(cmd, name, p, -1);
}

int tnl_ioctl_get_6rd(const char *name, void *p)
{
	return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL);
}

__be32 tnl_parse_key(const char *name, const char *key)
{
	unsigned int uval;

	if (strchr(key, '.'))
		return get_addr32(key);

	if (get_unsigned(&uval, key, 0) < 0) {
		fprintf(stderr,
			"invalid value for \"%s\": \"%s\"; it should be an unsigned integer\n",
			name, key);
		exit(-1);
	}
	return htonl(uval);
}

static const char *tnl_encap_str(const char *name, int enabled, int port)
{
	static const char ne[][sizeof("no")] = {
		[0] = "no",
		[1] = "",
	};
	static char buf[32];
	char b1[16];
	const char *val;

	if (!port) {
		val = "auto ";
	} else if (port < 0) {
		val = "";
	} else {
		snprintf(b1, sizeof(b1), "%u ", port - 1);
		val = b1;
	}

	snprintf(buf, sizeof(buf), "%sencap-%s %s", ne[!!enabled], name, val);
	return buf;
}

void tnl_print_encap(struct rtattr *tb[],
		     int encap_type, int encap_flags,
		     int encap_sport, int encap_dport)
{
	__u16 type, flags, sport, dport;

	if (!tb[encap_type])
		return;

	type = rta_getattr_u16(tb[encap_type]);
	if (type == TUNNEL_ENCAP_NONE)
		return;

	flags = rta_getattr_u16(tb[encap_flags]);
	sport = rta_getattr_u16(tb[encap_sport]);
	dport = rta_getattr_u16(tb[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", "%s ", "unknown");
		break;
	}

	if (is_json_context()) {
		print_uint(PRINT_JSON, "sport", NULL, ntohs(sport));
		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 {
		int t;

		t = sport ? ntohs(sport) + 1 : 0;
		print_string(PRINT_FP, NULL, "%s",
			     tnl_encap_str("sport", 1, t));

		t = ntohs(dport) + 1;
		print_string(PRINT_FP, NULL, "%s",
			     tnl_encap_str("dport", 1, t));

		t = flags & TUNNEL_ENCAP_FLAG_CSUM;
		print_string(PRINT_FP, NULL, "%s",
			     tnl_encap_str("csum", t, -1));

		t = flags & TUNNEL_ENCAP_FLAG_CSUM6;
		print_string(PRINT_FP, NULL, "%s",
			     tnl_encap_str("csum6", t, -1));

		t = flags & TUNNEL_ENCAP_FLAG_REMCSUM;
		print_string(PRINT_FP, NULL, "%s",
			     tnl_encap_str("remcsum", t, -1));
	}
}

/* tnl_print_stats - print tunnel statistics
 *
 * @buf - tunnel interface's line in /proc/net/dev,
 *        starting past the interface name and following colon
 */
void tnl_print_stats(const char *buf)
{
	unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
		      rx_fifo, rx_frame,
		      tx_bytes, tx_packets, tx_errs, tx_drops,
		      tx_fifo, tx_colls, tx_carrier, rx_multi;

	if (sscanf(buf, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
		   &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
		   &rx_fifo, &rx_frame, &rx_multi,
		   &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
		   &tx_fifo, &tx_colls, &tx_carrier) != 14)
		return;

	printf("%s", _SL_);
	printf("RX: Packets    Bytes        Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
	printf("    %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
	       rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
	printf("TX: Packets    Bytes        Errors DeadLoop NoRoute  NoBufs%s", _SL_);
	printf("    %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
	       tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
}
Commit	Line	Data
d9bd1bd9 MN	1	/*
d9bd1bd9 MN	2	* Copyright (C)2006 USAGI/WIDE Project
ae665a52	3	*
d9bd1bd9 MN	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
ae665a52	8	*
d9bd1bd9 MN	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
ae665a52	13	*
d9bd1bd9	14	* You should have received a copy of the GNU General Public License
4d98ab00	15	* along with this program; if not, see <http://www.gnu.org/licenses>.
d9bd1bd9 MN	16	*/
	17	/*
	18	* split from ip_tunnel.c
	19	*/
	20	/*
	21	* Author:
	22	* Masahide NAKAMURA @USAGI
	23	*/
	24
	25	#include <stdio.h>
	26	#include <string.h>
	27	#include <unistd.h>
3979ef91	28	#include <errno.h>
d9bd1bd9 MN	29	#include <sys/types.h>
	30	#include <sys/socket.h>
	31	#include <sys/ioctl.h>
	32	#include <netinet/in.h>
	33	#include <linux/if.h>
	34	#include <linux/ip.h>
	35	#include <linux/if_tunnel.h>
	36
	37	#include "utils.h"
	38	#include "tunnel.h"
bad76e6b	39	#include "json_print.h"
d9bd1bd9 MN	40
	41	const char *tnl_strproto(__u8 proto)
	42	{
d9bd1bd9 MN	43	switch (proto) {
d9bd1bd9 MN	44	case IPPROTO_IPIP:
c9391f12	45	return "ip";
d9bd1bd9	46	case IPPROTO_GRE:
c9391f12	47	return "gre";
d9bd1bd9	48	case IPPROTO_IPV6:
c9391f12	49	return "ipv6";
14e97673	50	case IPPROTO_ESP:
c9391f12	51	return "esp";
f005b700	52	case IPPROTO_MPLS:
c9391f12	53	return "mpls";
0b959b0f	54	case 0:
c9391f12	55	return "any";
d9bd1bd9	56	default:
c9391f12	57	return "unknown";
d9bd1bd9	58	}
d9bd1bd9 MN	59	}
d9bd1bd9 MN	60
d9bd1bd9 MN	61	int tnl_get_ioctl(const char basedev, void p)
	62	{
	63	struct ifreq ifr;
	64	int fd;
	65	int err;
	66
	67	strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
56f5daac	68	ifr.ifr_ifru.ifru_data = (void *)p;
cb89c7c7	69
d9bd1bd9	70	fd = socket(preferred_family, SOCK_DGRAM, 0);
cb89c7c7 ZS	71	if (fd < 0) {
	72	fprintf(stderr, "create socket failed: %s\n", strerror(errno));
	73	return -1;
	74	}
	75
d9bd1bd9 MN	76	err = ioctl(fd, SIOCGETTUNNEL, &ifr);
d9bd1bd9 MN	77	if (err)
14645ec2	78	fprintf(stderr, "get tunnel \"%s\" failed: %s\n", basedev,
ea71beac SH	79	strerror(errno));
ea71beac SH	80
d9bd1bd9 MN	81	close(fd);
	82	return err;
	83	}
	84
	85	int tnl_add_ioctl(int cmd, const char basedev, const char name, void *p)
	86	{
	87	struct ifreq ifr;
	88	int fd;
	89	int err;
	90
	91	if (cmd == SIOCCHGTUNNEL && name[0])
	92	strncpy(ifr.ifr_name, name, IFNAMSIZ);
	93	else
	94	strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
	95	ifr.ifr_ifru.ifru_data = p;
cb89c7c7	96
d9bd1bd9	97	fd = socket(preferred_family, SOCK_DGRAM, 0);
cb89c7c7 ZS	98	if (fd < 0) {
	99	fprintf(stderr, "create socket failed: %s\n", strerror(errno));
	100	return -1;
	101	}
	102
d9bd1bd9 MN	103	err = ioctl(fd, cmd, &ifr);
d9bd1bd9 MN	104	if (err)
14645ec2	105	fprintf(stderr, "add tunnel \"%s\" failed: %s\n", ifr.ifr_name,
ea71beac	106	strerror(errno));
d9bd1bd9 MN	107	close(fd);
	108	return err;
	109	}
	110
	111	int tnl_del_ioctl(const char basedev, const char name, void *p)
	112	{
	113	struct ifreq ifr;
	114	int fd;
	115	int err;
	116
	117	if (name[0])
	118	strncpy(ifr.ifr_name, name, IFNAMSIZ);
	119	else
	120	strncpy(ifr.ifr_name, basedev, IFNAMSIZ);
ea71beac	121
d9bd1bd9	122	ifr.ifr_ifru.ifru_data = p;
cb89c7c7	123
d9bd1bd9	124	fd = socket(preferred_family, SOCK_DGRAM, 0);
cb89c7c7 ZS	125	if (fd < 0) {
	126	fprintf(stderr, "create socket failed: %s\n", strerror(errno));
	127	return -1;
	128	}
	129
d9bd1bd9 MN	130	err = ioctl(fd, SIOCDELTUNNEL, &ifr);
d9bd1bd9 MN	131	if (err)
14645ec2	132	fprintf(stderr, "delete tunnel \"%s\" failed: %s\n",
ea71beac	133	ifr.ifr_name, strerror(errno));
d9bd1bd9 MN	134	close(fd);
	135	return err;
	136	}
a07e9912	137
0612519e	138	static int tnl_gen_ioctl(int cmd, const char *name,
ea71beac	139	void *p, int skiperr)
a07e9912 SH	140	{
	141	struct ifreq ifr;
	142	int fd;
	143	int err;
	144
	145	strncpy(ifr.ifr_name, name, IFNAMSIZ);
	146	ifr.ifr_ifru.ifru_data = p;
cb89c7c7	147
a07e9912	148	fd = socket(preferred_family, SOCK_DGRAM, 0);
cb89c7c7 ZS	149	if (fd < 0) {
	150	fprintf(stderr, "create socket failed: %s\n", strerror(errno));
	151	return -1;
	152	}
	153
a07e9912	154	err = ioctl(fd, cmd, &ifr);
3979ef91	155	if (err && errno != skiperr)
ea71beac SH	156	fprintf(stderr, "%s: ioctl %x failed: %s\n", name,
ea71beac SH	157	cmd, strerror(errno));
a07e9912 SH	158	close(fd);
	159	return err;
	160	}
b88215c4 AC	161
	162	int tnl_prl_ioctl(int cmd, const char name, void p)
	163	{
3979ef91	164	return tnl_gen_ioctl(cmd, name, p, -1);
b88215c4 AC	165	}
	166
	167	int tnl_6rd_ioctl(int cmd, const char name, void p)
	168	{
3979ef91	169	return tnl_gen_ioctl(cmd, name, p, -1);
b88215c4 AC	170	}
	171
	172	int tnl_ioctl_get_6rd(const char name, void p)
	173	{
3979ef91	174	return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL);
b88215c4	175	}
a7ed1520 PS	176
	177	__be32 tnl_parse_key(const char name, const char key)
	178	{
56f5daac	179	unsigned int uval;
a7ed1520 PS	180
	181	if (strchr(key, '.'))
	182	return get_addr32(key);
	183
	184	if (get_unsigned(&uval, key, 0) < 0) {
1f44b937 SP	185	fprintf(stderr,
	186	"invalid value for \"%s\": \"%s\"; it should be an unsigned integer\n",
	187	name, key);
a7ed1520 PS	188	exit(-1);
	189	}
	190	return htonl(uval);
	191	}
7d6aadcd	192
bad76e6b SP	193	static const char tnl_encap_str(const char name, int enabled, int port)
	194	{
	195	static const char ne[][sizeof("no")] = {
	196	[0] = "no",
	197	[1] = "",
	198	};
	199	static char buf[32];
	200	char b1[16];
	201	const char *val;
	202
	203	if (!port) {
b53835de	204	val = "auto ";
bad76e6b SP	205	} else if (port < 0) {
	206	val = "";
	207	} else {
b53835de	208	snprintf(b1, sizeof(b1), "%u ", port - 1);
bad76e6b SP	209	val = b1;
	210	}
	211
	212	snprintf(buf, sizeof(buf), "%sencap-%s %s", ne[!!enabled], name, val);
	213	return buf;
	214	}
	215
	216	void tnl_print_encap(struct rtattr *tb[],
	217	int encap_type, int encap_flags,
	218	int encap_sport, int encap_dport)
	219	{
	220	__u16 type, flags, sport, dport;
	221
	222	if (!tb[encap_type])
	223	return;
	224
	225	type = rta_getattr_u16(tb[encap_type]);
	226	if (type == TUNNEL_ENCAP_NONE)
	227	return;
	228
	229	flags = rta_getattr_u16(tb[encap_flags]);
	230	sport = rta_getattr_u16(tb[encap_sport]);
	231	dport = rta_getattr_u16(tb[encap_dport]);
	232
	233	open_json_object("encap");
	234	print_string(PRINT_FP, NULL, "encap ", NULL);
	235
	236	switch (type) {
	237	case TUNNEL_ENCAP_FOU:
	238	print_string(PRINT_ANY, "type", "%s ", "fou");
	239	break;
	240	case TUNNEL_ENCAP_GUE:
	241	print_string(PRINT_ANY, "type", "%s ", "gue");
	242	break;
	243	default:
	244	print_null(PRINT_ANY, "type", "%s ", "unknown");
	245	break;
	246	}
	247
	248	if (is_json_context()) {
	249	print_uint(PRINT_JSON, "sport", NULL, ntohs(sport));
	250	print_uint(PRINT_JSON, "dport", NULL, ntohs(dport));
	251	print_bool(PRINT_JSON, "csum", NULL,
	252	flags & TUNNEL_ENCAP_FLAG_CSUM);
	253	print_bool(PRINT_JSON, "csum6", NULL,
	254	flags & TUNNEL_ENCAP_FLAG_CSUM6);
	255	print_bool(PRINT_JSON, "remcsum", NULL,
	256	flags & TUNNEL_ENCAP_FLAG_REMCSUM);
	257	close_json_object();
	258	} else {
	259	int t;
	260
	261	t = sport ? ntohs(sport) + 1 : 0;
	262	print_string(PRINT_FP, NULL, "%s",
	263	tnl_encap_str("sport", 1, t));
	264
	265	t = ntohs(dport) + 1;
	266	print_string(PRINT_FP, NULL, "%s",
	267	tnl_encap_str("dport", 1, t));
	268
	269	t = flags & TUNNEL_ENCAP_FLAG_CSUM;
	270	print_string(PRINT_FP, NULL, "%s",
	271	tnl_encap_str("csum", t, -1));
	272
273	t = flags & TUNNEL_ENCAP_FLAG_CSUM6;
274	print_string(PRINT_FP, NULL, "%s",
275	tnl_encap_str("csum6", t, -1));
276
277	t = flags & TUNNEL_ENCAP_FLAG_REMCSUM;
278	print_string(PRINT_FP, NULL, "%s",
279	tnl_encap_str("remcsum", t, -1));
280	}
281	}
282
7d6aadcd PS	283	/* tnl_print_stats - print tunnel statistics
	284	*
	285	* @buf - tunnel interface's line in /proc/net/dev,
	286	* starting past the interface name and following colon
	287	*/
	288	void tnl_print_stats(const char *buf)
	289	{
	290	unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
	291	rx_fifo, rx_frame,
	292	tx_bytes, tx_packets, tx_errs, tx_drops,
	293	tx_fifo, tx_colls, tx_carrier, rx_multi;
	294
f8fc1d10	295	if (sscanf(buf, "%lu%lu%lu%lu%lu%lu%lu%*d%lu%lu%lu%lu%lu%lu%lu",
56f5daac SH	296	&rx_bytes, &rx_packets, &rx_errs, &rx_drops,
	297	&rx_fifo, &rx_frame, &rx_multi,
	298	&tx_bytes, &tx_packets, &tx_errs, &tx_drops,
	299	&tx_fifo, &tx_colls, &tx_carrier) != 14)
7d6aadcd PS	300	return;
	301
	302	printf("%s", _SL_);
	303	printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
	304	printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
	305	rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
	306	printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
	307	printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
	308	tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
	309	}