[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 <syslog.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 abuf[256];
	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 = *(int *)RTA_DATA(tb[RTA_IIF]);
	if (filter.iif && filter.iif != iif)
		return 0;

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

	if (tb[RTA_DST] && filter.mdst.bitlen > 0) {
		inet_prefix dst;

		memset(&dst, 0, sizeof(dst));
		dst.family = r->rtm_family;
		memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), RTA_PAYLOAD(tb[RTA_DST]));
		if (inet_addr_match(&dst, &filter.mdst, filter.mdst.bitlen))
			return 0;
	}

	if (tb[RTA_SRC] && filter.msrc.bitlen > 0) {
		inet_prefix src;

		memset(&src, 0, sizeof(src));
		src.family = r->rtm_family;
		memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), RTA_PAYLOAD(tb[RTA_SRC]));
		if (inet_addr_match(&src, &filter.msrc, filter.msrc.bitlen))
			return 0;
	}

	family = r->rtm_family == RTNL_FAMILY_IPMR ? AF_INET : AF_INET6;

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

	if (tb[RTA_SRC])
		len = snprintf(obuf, sizeof(obuf),
			       "(%s, ", rt_addr_n2a(family,
						    RTA_PAYLOAD(tb[RTA_SRC]),
						    RTA_DATA(tb[RTA_SRC]),
						    abuf, sizeof(abuf)));
	else
		len = sprintf(obuf, "(unknown, ");
	if (tb[RTA_DST])
		snprintf(obuf + len, sizeof(obuf) - len,
			 "%s)", rt_addr_n2a(family,
					    RTA_PAYLOAD(tb[RTA_DST]),
					    RTA_DATA(tb[RTA_DST]),
					    abuf, sizeof(abuf)));
	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);
		}
	}
	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);
	}
	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;

	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();
			get_prefix(&filter.msrc, *argv, family);
		} else {
			if (strcmp(*argv, "to") == 0) {
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0)
				usage();
			get_prefix(&filter.mdst, *argv, family);
		}
		argc--; argv++;
	}

	ll_init_map(&rth);

	if (id)  {
		int idx;

		if ((idx = ll_name_to_index(id)) == 0) {
			fprintf(stderr, "Cannot find device \"%s\"\n", id);
			return -1;
		}
		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>
	16	#include <syslog.h>
	17	#include <fcntl.h>
e34d3dcc	18	#include <inttypes.h>
aba5acdf SH	19	#include <sys/ioctl.h>
aba5acdf SH	20	#include <sys/socket.h>
03156410 SH	21	#include <netinet/in.h>
	22	#include <arpa/inet.h>
	23	#include <string.h>
	24
aba5acdf SH	25	#include <linux/netdevice.h>
	26	#include <linux/if.h>
	27	#include <linux/if_arp.h>
	28	#include <linux/sockios.h>
aba5acdf	29
e34d3dcc	30	#include <rt_names.h>
aba5acdf	31	#include "utils.h"
e34d3dcc	32	#include "ip_common.h"
aba5acdf SH	33
	34	static void usage(void) __attribute__((noreturn));
	35
	36	static void usage(void)
	37	{
e34d3dcc	38	fprintf(stderr, "Usage: ip mroute show [ [ to ] PREFIX ] [ from PREFIX ] [ iif DEVICE ]\n");
2a898320 ND	39	fprintf(stderr, " [ table TABLE_ID ]\n");
2a898320 ND	40	fprintf(stderr, "TABLE_ID := [ local \| main \| default \| all \| NUMBER ]\n");
aba5acdf SH	41	#if 0
	42	fprintf(stderr, "Usage: ip mroute [ add \| del ] DESTINATION from SOURCE [ iif DEVICE ] [ oif DEVICE ]\n");
	43	#endif
	44	exit(-1);
	45	}
	46
56f5daac	47	struct rtfilter {
e34d3dcc ND	48	int tb;
	49	int af;
	50	int iif;
aba5acdf SH	51	inet_prefix mdst;
	52	inet_prefix msrc;
	53	} filter;
	54
e34d3dcc	55	int print_mroute(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
aba5acdf	56	{
56f5daac	57	FILE fp = (FILE )arg;
e34d3dcc ND	58	struct rtmsg *r = NLMSG_DATA(n);
e34d3dcc ND	59	int len = n->nlmsg_len;
56f5daac	60	struct rtattr *tb[RTA_MAX+1];
e34d3dcc ND	61	char abuf[256];
e34d3dcc ND	62	char obuf[256];
56f5daac	63
e34d3dcc ND	64	SPRINT_BUF(b1);
	65	__u32 table;
	66	int iif = 0;
	67	int family;
	68
	69	if ((n->nlmsg_type != RTM_NEWROUTE &&
505f9186	70	n->nlmsg_type != RTM_DELROUTE)) {
e34d3dcc ND	71	fprintf(stderr, "Not a multicast route: %08x %08x %08x\n",
	72	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
	73	return 0;
67ef60a2	74	}
e34d3dcc ND	75	len -= NLMSG_LENGTH(sizeof(*r));
	76	if (len < 0) {
	77	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	78	return -1;
aba5acdf	79	}
e34d3dcc ND	80	if (r->rtm_type != RTN_MULTICAST) {
	81	fprintf(stderr, "Not a multicast route (type: %s)\n",
	82	rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
	83	return 0;
e588a7db	84	}
aba5acdf	85
e34d3dcc ND	86	parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
	87	table = rtm_get_table(r, tb);
	88
	89	if (filter.tb > 0 && filter.tb != table)
	90	return 0;
	91
	92	if (tb[RTA_IIF])
56f5daac	93	iif = (int )RTA_DATA(tb[RTA_IIF]);
e34d3dcc ND	94	if (filter.iif && filter.iif != iif)
	95	return 0;
	96
	97	if (filter.af && filter.af != r->rtm_family)
	98	return 0;
	99
45b01c46 MR	100	if (tb[RTA_DST] && filter.mdst.bitlen > 0) {
	101	inet_prefix dst;
	102
	103	memset(&dst, 0, sizeof(dst));
	104	dst.family = r->rtm_family;
	105	memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), RTA_PAYLOAD(tb[RTA_DST]));
	106	if (inet_addr_match(&dst, &filter.mdst, filter.mdst.bitlen))
	107	return 0;
	108	}
e34d3dcc	109
45b01c46 MR	110	if (tb[RTA_SRC] && filter.msrc.bitlen > 0) {
	111	inet_prefix src;
	112
	113	memset(&src, 0, sizeof(src));
	114	src.family = r->rtm_family;
	115	memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), RTA_PAYLOAD(tb[RTA_SRC]));
	116	if (inet_addr_match(&src, &filter.msrc, filter.msrc.bitlen))
	117	return 0;
	118	}
e34d3dcc ND	119
	120	family = r->rtm_family == RTNL_FAMILY_IPMR ? AF_INET : AF_INET6;
	121
	122	if (n->nlmsg_type == RTM_DELROUTE)
	123	fprintf(fp, "Deleted ");
	124
	125	if (tb[RTA_SRC])
	126	len = snprintf(obuf, sizeof(obuf),
	127	"(%s, ", rt_addr_n2a(family,
26dcdf3a	128	RTA_PAYLOAD(tb[RTA_SRC]),
e34d3dcc ND	129	RTA_DATA(tb[RTA_SRC]),
	130	abuf, sizeof(abuf)));
	131	else
	132	len = sprintf(obuf, "(unknown, ");
	133	if (tb[RTA_DST])
	134	snprintf(obuf + len, sizeof(obuf) - len,
656111b2	135	"%s)", rt_addr_n2a(family,
26dcdf3a	136	RTA_PAYLOAD(tb[RTA_DST]),
e34d3dcc ND	137	RTA_DATA(tb[RTA_DST]),
	138	abuf, sizeof(abuf)));
	139	else
	140	snprintf(obuf + len, sizeof(obuf) - len, "unknown) ");
	141
	142	fprintf(fp, "%-32s Iif: ", obuf);
	143	if (iif)
	144	fprintf(fp, "%-10s ", ll_index_to_name(iif));
	145	else
	146	fprintf(fp, "unresolved ");
	147
	148	if (tb[RTA_MULTIPATH]) {
	149	struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
	150	int first = 1;
	151
	152	len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
	153
	154	for (;;) {
	155	if (len < sizeof(*nh))
	156	break;
	157	if (nh->rtnh_len > len)
	158	break;
	159
	160	if (first) {
	161	fprintf(fp, "Oifs: ");
	162	first = 0;
aba5acdf	163	}
e34d3dcc ND	164	fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
	165	if (nh->rtnh_hops > 1)
	166	fprintf(fp, "(ttl %d) ", nh->rtnh_hops);
	167	else
	168	fprintf(fp, " ");
	169	len -= NLMSG_ALIGN(nh->rtnh_len);
	170	nh = RTNH_NEXT(nh);
aba5acdf	171	}
aba5acdf	172	}
e34d3dcc ND	173	if (show_stats && tb[RTA_MFC_STATS]) {
	174	struct rta_mfc_stats *mfcs = RTA_DATA(tb[RTA_MFC_STATS]);
	175
	176	fprintf(fp, "%s %"PRIu64" packets, %"PRIu64" bytes", _SL_,
	177	(uint64_t)mfcs->mfcs_packets,
	178	(uint64_t)mfcs->mfcs_bytes);
	179	if (mfcs->mfcs_wrong_if)
	180	fprintf(fp, ", %"PRIu64" arrived on wrong iif.",
	181	(uint64_t)mfcs->mfcs_wrong_if);
	182	}
	183	fprintf(fp, "\n");
	184	fflush(fp);
	185	return 0;
aba5acdf SH	186	}
aba5acdf SH	187
093b7646	188	void ipmroute_reset_filter(int ifindex)
e34d3dcc ND	189	{
	190	memset(&filter, 0, sizeof(filter));
	191	filter.mdst.bitlen = -1;
	192	filter.msrc.bitlen = -1;
093b7646	193	filter.iif = ifindex;
e34d3dcc	194	}
aba5acdf SH	195
	196	static int mroute_list(int argc, char **argv)
	197	{
e34d3dcc ND	198	char *id = NULL;
	199	int family;
	200
093b7646	201	ipmroute_reset_filter(0);
e34d3dcc ND	202	if (preferred_family == AF_UNSPEC)
	203	family = AF_INET;
	204	else
	205	family = AF_INET6;
	206	if (family == AF_INET) {
	207	filter.af = RTNL_FAMILY_IPMR;
	208	filter.tb = RT_TABLE_DEFAULT; /* for backward compatibility */
	209	} else
	210	filter.af = RTNL_FAMILY_IP6MR;
	211
aba5acdf	212	while (argc > 0) {
e34d3dcc ND	213	if (matches(*argv, "table") == 0) {
e34d3dcc ND	214	__u32 tid;
56f5daac	215
aba5acdf	216	NEXT_ARG();
e34d3dcc ND	217	if (rtnl_rttable_a2n(&tid, *argv)) {
	218	if (strcmp(*argv, "all") == 0) {
	219	filter.tb = 0;
	220	} else if (strcmp(*argv, "help") == 0) {
	221	usage();
	222	} else {
	223	invarg("table id value is invalid\n", *argv);
	224	}
	225	} else
	226	filter.tb = tid;
	227	} else if (strcmp(*argv, "iif") == 0) {
	228	NEXT_ARG();
	229	id = *argv;
aba5acdf SH	230	} else if (matches(*argv, "from") == 0) {
aba5acdf SH	231	NEXT_ARG();
e34d3dcc	232	get_prefix(&filter.msrc, *argv, family);
aba5acdf SH	233	} else {
	234	if (strcmp(*argv, "to") == 0) {
	235	NEXT_ARG();
	236	}
	237	if (matches(*argv, "help") == 0)
	238	usage();
e34d3dcc	239	get_prefix(&filter.mdst, *argv, family);
aba5acdf	240	}
e34d3dcc	241	argc--; argv++;
aba5acdf SH	242	}
aba5acdf SH	243
e34d3dcc ND	244	ll_init_map(&rth);
	245
	246	if (id) {
	247	int idx;
	248
	249	if ((idx = ll_name_to_index(id)) == 0) {
	250	fprintf(stderr, "Cannot find device \"%s\"\n", id);
	251	return -1;
	252	}
	253	filter.iif = idx;
	254	}
	255
	256	if (rtnl_wilddump_request(&rth, filter.af, RTM_GETROUTE) < 0) {
	257	perror("Cannot send dump request");
	258	return 1;
	259	}
	260
	261	if (rtnl_dump_filter(&rth, print_mroute, stdout) < 0) {
	262	fprintf(stderr, "Dump terminated\n");
	263	exit(1);
	264	}
	265
	266	exit(0);
aba5acdf SH	267	}
	268
	269	int do_multiroute(int argc, char **argv)
	270	{
	271	if (argc < 1)
	272	return mroute_list(0, NULL);
	273	#if 0
	274	if (matches(*argv, "add") == 0)
	275	return mroute_modify(RTM_NEWADDR, argc-1, argv+1);
	276	if (matches(*argv, "delete") == 0)
	277	return mroute_modify(RTM_DELADDR, argc-1, argv+1);
	278	if (matches(*argv, "get") == 0)
	279	return mroute_get(argc-1, argv+1);
	280	#endif
	281	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
	282	\|\| matches(*argv, "lst") == 0)
	283	return mroute_list(argc-1, argv+1);
	284	if (matches(*argv, "help") == 0)
	285	usage();
	286	fprintf(stderr, "Command \"%s\" is unknown, try \"ip mroute help\".\n", *argv);
	287	exit(-1);
	288	}