[mirror_iproute2.git] / ip / ipmroute.c

/*
 * ipmroute.c		"ip mroute".
 *
 *		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:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>

#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/sockios.h>

#include <rt_names.h>
#include "utils.h"
#include "ip_common.h"

static void usage(void) __attribute__((noreturn));

static void usage(void)
{
	fprintf(stderr, "Usage: ip mroute show [ [ to ] PREFIX ] [ from PREFIX ] [ iif DEVICE ]\n");
	fprintf(stderr, "                      [ table TABLE_ID ]\n");
	fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
#if 0
	fprintf(stderr, "Usage: ip mroute [ add | del ] DESTINATION from SOURCE [ iif DEVICE ] [ oif DEVICE ]\n");
#endif
	exit(-1);
}

struct rtfilter {
	int tb;
	int af;
	int iif;
	inet_prefix mdst;
	inet_prefix msrc;
} filter;

int print_mroute(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE *)arg;
	struct rtmsg *r = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr *tb[RTA_MAX+1];
	char obuf[256];

	SPRINT_BUF(b1);
	__u32 table;
	int iif = 0;
	int family;

	if ((n->nlmsg_type != RTM_NEWROUTE &&
	     n->nlmsg_type != RTM_DELROUTE)) {
		fprintf(stderr, "Not a multicast route: %08x %08x %08x\n",
			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
		return 0;
	}
	len -= NLMSG_LENGTH(sizeof(*r));
	if (len < 0) {
		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
		return -1;
	}
	if (r->rtm_type != RTN_MULTICAST) {
		fprintf(stderr, "Not a multicast route (type: %s)\n",
			rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
		return 0;
	}

	parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
	table = rtm_get_table(r, tb);

	if (filter.tb > 0 && filter.tb != table)
		return 0;

	if (tb[RTA_IIF])
		iif = rta_getattr_u32(tb[RTA_IIF]);
	if (filter.iif && filter.iif != iif)
		return 0;

	if (filter.af && filter.af != r->rtm_family)
		return 0;

	if (inet_addr_match_rta(&filter.mdst, tb[RTA_DST]))
		return 0;

	if (inet_addr_match_rta(&filter.msrc, tb[RTA_SRC]))
		return 0;

	family = get_real_family(r->rtm_type, r->rtm_family);

	if (n->nlmsg_type == RTM_DELROUTE)
		fprintf(fp, "Deleted ");

	if (tb[RTA_SRC])
		len = snprintf(obuf, sizeof(obuf),
			       "(%s, ", rt_addr_n2a_rta(family, tb[RTA_SRC]));
	else
		len = sprintf(obuf, "(unknown, ");
	if (tb[RTA_DST])
		snprintf(obuf + len, sizeof(obuf) - len,
			 "%s)", rt_addr_n2a_rta(family, tb[RTA_DST]));
	else
		snprintf(obuf + len, sizeof(obuf) - len, "unknown) ");

	fprintf(fp, "%-32s Iif: ", obuf);
	if (iif)
		fprintf(fp, "%-10s ", ll_index_to_name(iif));
	else
		fprintf(fp, "unresolved ");

	if (tb[RTA_MULTIPATH]) {
		struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
		int first = 1;

		len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);

		for (;;) {
			if (len < sizeof(*nh))
				break;
			if (nh->rtnh_len > len)
				break;

			if (first) {
				fprintf(fp, "Oifs: ");
				first = 0;
			}
			fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
			if (nh->rtnh_hops > 1)
				fprintf(fp, "(ttl %d) ", nh->rtnh_hops);
			else
				fprintf(fp, " ");
			len -= NLMSG_ALIGN(nh->rtnh_len);
			nh = RTNH_NEXT(nh);
		}
	}
	fprintf(fp, " State: %s",
		r->rtm_flags & RTNH_F_UNRESOLVED ? "unresolved" : "resolved");
	if (r->rtm_flags & RTNH_F_OFFLOAD)
		fprintf(fp, " offload");
	if (show_stats && tb[RTA_MFC_STATS]) {
		struct rta_mfc_stats *mfcs = RTA_DATA(tb[RTA_MFC_STATS]);

		fprintf(fp, "%s  %"PRIu64" packets, %"PRIu64" bytes", _SL_,
			(uint64_t)mfcs->mfcs_packets,
			(uint64_t)mfcs->mfcs_bytes);
		if (mfcs->mfcs_wrong_if)
			fprintf(fp, ", %"PRIu64" arrived on wrong iif.",
				(uint64_t)mfcs->mfcs_wrong_if);
	}
	if (show_stats && tb[RTA_EXPIRES]) {
		struct timeval tv;

		__jiffies_to_tv(&tv, rta_getattr_u64(tb[RTA_EXPIRES]));
		fprintf(fp, ", Age %4i.%.2i", (int)tv.tv_sec,
			(int)tv.tv_usec/10000);
	}

	if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
		fprintf(fp, " Table: %s",
			rtnl_rttable_n2a(table, b1, sizeof(b1)));

	fprintf(fp, "\n");
	fflush(fp);
	return 0;
}

void ipmroute_reset_filter(int ifindex)
{
	memset(&filter, 0, sizeof(filter));
	filter.mdst.bitlen = -1;
	filter.msrc.bitlen = -1;
	filter.iif = ifindex;
}

static int mroute_list(int argc, char **argv)
{
	char *id = NULL;
	int family;

	ipmroute_reset_filter(0);
	if (preferred_family == AF_UNSPEC)
		family = AF_INET;
	else
		family = AF_INET6;
	if (family == AF_INET) {
		filter.af = RTNL_FAMILY_IPMR;
		filter.tb = RT_TABLE_DEFAULT;  /* for backward compatibility */
	} else
		filter.af = RTNL_FAMILY_IP6MR;

	filter.msrc.family = filter.mdst.family = family;

	while (argc > 0) {
		if (matches(*argv, "table") == 0) {
			__u32 tid;

			NEXT_ARG();
			if (rtnl_rttable_a2n(&tid, *argv)) {
				if (strcmp(*argv, "all") == 0) {
					filter.tb = 0;
				} else if (strcmp(*argv, "help") == 0) {
					usage();
				} else {
					invarg("table id value is invalid\n", *argv);
				}
			} else
				filter.tb = tid;
		} else if (strcmp(*argv, "iif") == 0) {
			NEXT_ARG();
			id = *argv;
		} else if (matches(*argv, "from") == 0) {
			NEXT_ARG();
			if (get_prefix(&filter.msrc, *argv, family))
				invarg("from value is invalid\n", *argv);
		} else {
			if (strcmp(*argv, "to") == 0) {
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0)
				usage();
			if (get_prefix(&filter.mdst, *argv, family))
				invarg("to value is invalid\n", *argv);
		}
		argc--; argv++;
	}

	ll_init_map(&rth);

	if (id)  {
		int idx;

		idx = ll_name_to_index(id);
		if (!idx)
			return nodev(id);
		filter.iif = idx;
	}

	if (rtnl_wilddump_request(&rth, filter.af, RTM_GETROUTE) < 0) {
		perror("Cannot send dump request");
		return 1;
	}

	if (rtnl_dump_filter(&rth, print_mroute, stdout) < 0) {
		fprintf(stderr, "Dump terminated\n");
		exit(1);
	}

	exit(0);
}

int do_multiroute(int argc, char **argv)
{
	if (argc < 1)
		return mroute_list(0, NULL);
#if 0
	if (matches(*argv, "add") == 0)
		return mroute_modify(RTM_NEWADDR, argc-1, argv+1);
	if (matches(*argv, "delete") == 0)
		return mroute_modify(RTM_DELADDR, argc-1, argv+1);
	if (matches(*argv, "get") == 0)
		return mroute_get(argc-1, argv+1);
#endif
	if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
	    || matches(*argv, "lst") == 0)
		return mroute_list(argc-1, argv+1);
	if (matches(*argv, "help") == 0)
		usage();
	fprintf(stderr, "Command \"%s\" is unknown, try \"ip mroute help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* ipmroute.c "ip mroute".
	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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	*
	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
aba5acdf	16	#include <fcntl.h>
e34d3dcc	17	#include <inttypes.h>
aba5acdf SH	18	#include <sys/ioctl.h>
aba5acdf SH	19	#include <sys/socket.h>
03156410 SH	20	#include <netinet/in.h>
	21	#include <arpa/inet.h>
	22	#include <string.h>
	23
aba5acdf SH	24	#include <linux/netdevice.h>
	25	#include <linux/if.h>
	26	#include <linux/if_arp.h>
	27	#include <linux/sockios.h>
aba5acdf	28
e34d3dcc	29	#include <rt_names.h>
aba5acdf	30	#include "utils.h"
e34d3dcc	31	#include "ip_common.h"
aba5acdf SH	32
	33	static void usage(void) __attribute__((noreturn));
	34
	35	static void usage(void)
	36	{
e34d3dcc	37	fprintf(stderr, "Usage: ip mroute show [ [ to ] PREFIX ] [ from PREFIX ] [ iif DEVICE ]\n");
2a898320 ND	38	fprintf(stderr, " [ table TABLE_ID ]\n");
2a898320 ND	39	fprintf(stderr, "TABLE_ID := [ local \| main \| default \| all \| NUMBER ]\n");
aba5acdf SH	40	#if 0
	41	fprintf(stderr, "Usage: ip mroute [ add \| del ] DESTINATION from SOURCE [ iif DEVICE ] [ oif DEVICE ]\n");
	42	#endif
	43	exit(-1);
	44	}
	45
56f5daac	46	struct rtfilter {
e34d3dcc ND	47	int tb;
	48	int af;
	49	int iif;
aba5acdf SH	50	inet_prefix mdst;
	51	inet_prefix msrc;
	52	} filter;
	53
e34d3dcc	54	int print_mroute(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
aba5acdf	55	{
56f5daac	56	FILE fp = (FILE )arg;
e34d3dcc ND	57	struct rtmsg *r = NLMSG_DATA(n);
e34d3dcc ND	58	int len = n->nlmsg_len;
56f5daac	59	struct rtattr *tb[RTA_MAX+1];
e34d3dcc	60	char obuf[256];
56f5daac	61
e34d3dcc ND	62	SPRINT_BUF(b1);
	63	__u32 table;
	64	int iif = 0;
	65	int family;
	66
	67	if ((n->nlmsg_type != RTM_NEWROUTE &&
505f9186	68	n->nlmsg_type != RTM_DELROUTE)) {
e34d3dcc ND	69	fprintf(stderr, "Not a multicast route: %08x %08x %08x\n",
	70	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
	71	return 0;
67ef60a2	72	}
e34d3dcc ND	73	len -= NLMSG_LENGTH(sizeof(*r));
	74	if (len < 0) {
	75	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	76	return -1;
aba5acdf	77	}
e34d3dcc ND	78	if (r->rtm_type != RTN_MULTICAST) {
	79	fprintf(stderr, "Not a multicast route (type: %s)\n",
	80	rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
	81	return 0;
e588a7db	82	}
aba5acdf	83
e34d3dcc ND	84	parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
	85	table = rtm_get_table(r, tb);
	86
	87	if (filter.tb > 0 && filter.tb != table)
	88	return 0;
	89
	90	if (tb[RTA_IIF])
9f1370c0	91	iif = rta_getattr_u32(tb[RTA_IIF]);
e34d3dcc ND	92	if (filter.iif && filter.iif != iif)
	93	return 0;
	94
	95	if (filter.af && filter.af != r->rtm_family)
	96	return 0;
	97
ba6052df SP	98	if (inet_addr_match_rta(&filter.mdst, tb[RTA_DST]))
ba6052df SP	99	return 0;
45b01c46	100
ba6052df SP	101	if (inet_addr_match_rta(&filter.msrc, tb[RTA_SRC]))
ba6052df SP	102	return 0;
e34d3dcc	103
56e3eb4c	104	family = get_real_family(r->rtm_type, r->rtm_family);
e34d3dcc ND	105
	106	if (n->nlmsg_type == RTM_DELROUTE)
	107	fprintf(fp, "Deleted ");
	108
	109	if (tb[RTA_SRC])
	110	len = snprintf(obuf, sizeof(obuf),
7faf1588	111	"(%s, ", rt_addr_n2a_rta(family, tb[RTA_SRC]));
e34d3dcc ND	112	else
	113	len = sprintf(obuf, "(unknown, ");
	114	if (tb[RTA_DST])
	115	snprintf(obuf + len, sizeof(obuf) - len,
7faf1588	116	"%s)", rt_addr_n2a_rta(family, tb[RTA_DST]));
e34d3dcc ND	117	else
	118	snprintf(obuf + len, sizeof(obuf) - len, "unknown) ");
	119
	120	fprintf(fp, "%-32s Iif: ", obuf);
	121	if (iif)
	122	fprintf(fp, "%-10s ", ll_index_to_name(iif));
	123	else
	124	fprintf(fp, "unresolved ");
	125
	126	if (tb[RTA_MULTIPATH]) {
	127	struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
	128	int first = 1;
	129
	130	len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
	131
	132	for (;;) {
	133	if (len < sizeof(*nh))
	134	break;
	135	if (nh->rtnh_len > len)
	136	break;
	137
	138	if (first) {
	139	fprintf(fp, "Oifs: ");
	140	first = 0;
aba5acdf	141	}
e34d3dcc ND	142	fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
	143	if (nh->rtnh_hops > 1)
	144	fprintf(fp, "(ttl %d) ", nh->rtnh_hops);
	145	else
	146	fprintf(fp, " ");
	147	len -= NLMSG_ALIGN(nh->rtnh_len);
	148	nh = RTNH_NEXT(nh);
aba5acdf	149	}
aba5acdf	150	}
e763e331 NA	151	fprintf(fp, " State: %s",
e763e331 NA	152	r->rtm_flags & RTNH_F_UNRESOLVED ? "unresolved" : "resolved");
2055bf15 YG	153	if (r->rtm_flags & RTNH_F_OFFLOAD)
2055bf15 YG	154	fprintf(fp, " offload");
e34d3dcc ND	155	if (show_stats && tb[RTA_MFC_STATS]) {
	156	struct rta_mfc_stats *mfcs = RTA_DATA(tb[RTA_MFC_STATS]);
	157
	158	fprintf(fp, "%s %"PRIu64" packets, %"PRIu64" bytes", _SL_,
	159	(uint64_t)mfcs->mfcs_packets,
	160	(uint64_t)mfcs->mfcs_bytes);
	161	if (mfcs->mfcs_wrong_if)
	162	fprintf(fp, ", %"PRIu64" arrived on wrong iif.",
	163	(uint64_t)mfcs->mfcs_wrong_if);
	164	}
590bf22a NA	165	if (show_stats && tb[RTA_EXPIRES]) {
	166	struct timeval tv;
	167
	168	__jiffies_to_tv(&tv, rta_getattr_u64(tb[RTA_EXPIRES]));
	169	fprintf(fp, ", Age %4i.%.2i", (int)tv.tv_sec,
	170	(int)tv.tv_usec/10000);
	171	}
3dc98cf2 DS	172
	173	if (table && (table != RT_TABLE_MAIN \|\| show_details > 0) && !filter.tb)
	174	fprintf(fp, " Table: %s",
	175	rtnl_rttable_n2a(table, b1, sizeof(b1)));
	176
e34d3dcc ND	177	fprintf(fp, "\n");
	178	fflush(fp);
	179	return 0;
aba5acdf SH	180	}
aba5acdf SH	181
093b7646	182	void ipmroute_reset_filter(int ifindex)
e34d3dcc ND	183	{
	184	memset(&filter, 0, sizeof(filter));
	185	filter.mdst.bitlen = -1;
	186	filter.msrc.bitlen = -1;
093b7646	187	filter.iif = ifindex;
e34d3dcc	188	}
aba5acdf SH	189
	190	static int mroute_list(int argc, char **argv)
	191	{
e34d3dcc ND	192	char *id = NULL;
	193	int family;
	194
093b7646	195	ipmroute_reset_filter(0);
e34d3dcc ND	196	if (preferred_family == AF_UNSPEC)
	197	family = AF_INET;
	198	else
	199	family = AF_INET6;
	200	if (family == AF_INET) {
	201	filter.af = RTNL_FAMILY_IPMR;
	202	filter.tb = RT_TABLE_DEFAULT; /* for backward compatibility */
	203	} else
	204	filter.af = RTNL_FAMILY_IP6MR;
	205
ba6052df SP	206	filter.msrc.family = filter.mdst.family = family;
ba6052df SP	207
aba5acdf	208	while (argc > 0) {
e34d3dcc ND	209	if (matches(*argv, "table") == 0) {
e34d3dcc ND	210	__u32 tid;
56f5daac	211
aba5acdf	212	NEXT_ARG();
e34d3dcc ND	213	if (rtnl_rttable_a2n(&tid, *argv)) {
	214	if (strcmp(*argv, "all") == 0) {
	215	filter.tb = 0;
	216	} else if (strcmp(*argv, "help") == 0) {
	217	usage();
	218	} else {
	219	invarg("table id value is invalid\n", *argv);
	220	}
	221	} else
	222	filter.tb = tid;
	223	} else if (strcmp(*argv, "iif") == 0) {
	224	NEXT_ARG();
	225	id = *argv;
aba5acdf SH	226	} else if (matches(*argv, "from") == 0) {
aba5acdf SH	227	NEXT_ARG();
ba6052df SP	228	if (get_prefix(&filter.msrc, *argv, family))
ba6052df SP	229	invarg("from value is invalid\n", *argv);
aba5acdf SH	230	} else {
	231	if (strcmp(*argv, "to") == 0) {
	232	NEXT_ARG();
	233	}
	234	if (matches(*argv, "help") == 0)
	235	usage();
ba6052df SP	236	if (get_prefix(&filter.mdst, *argv, family))
ba6052df SP	237	invarg("to value is invalid\n", *argv);
aba5acdf	238	}
e34d3dcc	239	argc--; argv++;
aba5acdf SH	240	}
aba5acdf SH	241
e34d3dcc ND	242	ll_init_map(&rth);
	243
	244	if (id) {
	245	int idx;
	246
fe99adbc SP	247	idx = ll_name_to_index(id);
	248	if (!idx)
	249	return nodev(id);
e34d3dcc ND	250	filter.iif = idx;
	251	}
	252
	253	if (rtnl_wilddump_request(&rth, filter.af, RTM_GETROUTE) < 0) {
	254	perror("Cannot send dump request");
	255	return 1;
	256	}
	257
	258	if (rtnl_dump_filter(&rth, print_mroute, stdout) < 0) {
	259	fprintf(stderr, "Dump terminated\n");
	260	exit(1);
	261	}
	262
	263	exit(0);
aba5acdf SH	264	}
	265
	266	int do_multiroute(int argc, char **argv)
	267	{
	268	if (argc < 1)
	269	return mroute_list(0, NULL);
	270	#if 0
	271	if (matches(*argv, "add") == 0)
	272	return mroute_modify(RTM_NEWADDR, argc-1, argv+1);
	273	if (matches(*argv, "delete") == 0)
	274	return mroute_modify(RTM_DELADDR, argc-1, argv+1);
	275	if (matches(*argv, "get") == 0)
	276	return mroute_get(argc-1, argv+1);
	277	#endif
	278	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
	279	\|\| matches(*argv, "lst") == 0)
	280	return mroute_list(argc-1, argv+1);
	281	if (matches(*argv, "help") == 0)
	282	usage();
	283	fprintf(stderr, "Command \"%s\" is unknown, try \"ip mroute help\".\n", *argv);
	284	exit(-1);
	285	}