[mirror_iproute2.git] / ip / ipneigh.c

/*
 * ipneigh.c		"ip neigh".
 *
 *		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 <string.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>

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

#define NUD_VALID	(NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
#define MAX_ROUNDS	10

static struct
{
	int family;
	int index;
	int state;
	int unused_only;
	inet_prefix pfx;
	int flushed;
	char *flushb;
	int flushp;
	int flushe;
	int master;
} filter;

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

static void usage(void)
{
	fprintf(stderr, "Usage: ip neigh { add | del | change | replace }\n"
			"                { ADDR [ lladdr LLADDR ] [ nud STATE ] | proxy ADDR } [ dev DEV ]\n");
	fprintf(stderr, "       ip neigh { show | flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n\n");
	fprintf(stderr, "STATE := { permanent | noarp | stale | reachable | none |\n"
			"           incomplete | delay | probe | failed }\n");
	exit(-1);
}

static int nud_state_a2n(unsigned int *state, const char *arg)
{
	if (matches(arg, "permanent") == 0)
		*state = NUD_PERMANENT;
	else if (matches(arg, "reachable") == 0)
		*state = NUD_REACHABLE;
	else if (strcmp(arg, "noarp") == 0)
		*state = NUD_NOARP;
	else if (strcmp(arg, "none") == 0)
		*state = NUD_NONE;
	else if (strcmp(arg, "stale") == 0)
		*state = NUD_STALE;
	else if (strcmp(arg, "incomplete") == 0)
		*state = NUD_INCOMPLETE;
	else if (strcmp(arg, "delay") == 0)
		*state = NUD_DELAY;
	else if (strcmp(arg, "probe") == 0)
		*state = NUD_PROBE;
	else if (matches(arg, "failed") == 0)
		*state = NUD_FAILED;
	else {
		if (get_unsigned(state, arg, 0))
			return -1;
		if (*state >= 0x100 || (*state&((*state)-1)))
			return -1;
	}
	return 0;
}

static int flush_update(void)
{
	if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
		perror("Failed to send flush request");
		return -1;
	}
	filter.flushp = 0;
	return 0;
}


static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
{
	struct {
		struct nlmsghdr	n;
		struct ndmsg		ndm;
		char			buf[256];
	} req;
	char  *dev = NULL;
	int dst_ok = 0;
	int dev_ok = 0;
	int lladdr_ok = 0;
	char *lla = NULL;
	inet_prefix dst;

	memset(&req, 0, sizeof(req));

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
	req.n.nlmsg_type = cmd;
	req.ndm.ndm_family = preferred_family;
	req.ndm.ndm_state = NUD_PERMANENT;

	while (argc > 0) {
		if (matches(*argv, "lladdr") == 0) {
			NEXT_ARG();
			if (lladdr_ok)
				duparg("lladdr", *argv);
			lla = *argv;
			lladdr_ok = 1;
		} else if (strcmp(*argv, "nud") == 0) {
			unsigned int state;

			NEXT_ARG();
			if (nud_state_a2n(&state, *argv))
				invarg("nud state is bad", *argv);
			req.ndm.ndm_state = state;
		} else if (matches(*argv, "proxy") == 0) {
			NEXT_ARG();
			if (matches(*argv, "help") == 0)
				usage();
			if (dst_ok)
				duparg("address", *argv);
			get_addr(&dst, *argv, preferred_family);
			dst_ok = 1;
			dev_ok = 1;
			req.ndm.ndm_flags |= NTF_PROXY;
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			dev = *argv;
			dev_ok = 1;
		} else {
			if (strcmp(*argv, "to") == 0) {
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0) {
				NEXT_ARG();
			}
			if (dst_ok)
				duparg2("to", *argv);
			get_addr(&dst, *argv, preferred_family);
			dst_ok = 1;
		}
		argc--; argv++;
	}
	if (!dev_ok || !dst_ok || dst.family == AF_UNSPEC) {
		fprintf(stderr, "Device and destination are required arguments.\n");
		exit(-1);
	}
	req.ndm.ndm_family = dst.family;
	if (addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen) < 0)
		return -1;

	if (lla && strcmp(lla, "null")) {
		char llabuf[20];
		int l;

		l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
		if (l < 0)
			return -1;

		if (addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l) < 0)
			return -1;
	}

	ll_init_map(&rth);

	if (dev && (req.ndm.ndm_ifindex = ll_name_to_index(dev)) == 0) {
		fprintf(stderr, "Cannot find device \"%s\"\n", dev);
		return -1;
	}

	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
		exit(2);

	return 0;
}


int print_neigh(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE *)arg;
	struct ndmsg *r = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr *tb[NDA_MAX+1];
	char abuf[256];
	static int logit = 1;

	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH &&
	    n->nlmsg_type != RTM_GETNEIGH) {
		fprintf(stderr, "Not RTM_NEWNEIGH: %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 (filter.flushb && n->nlmsg_type != RTM_NEWNEIGH)
		return 0;

	if (filter.family && filter.family != r->ndm_family)
		return 0;
	if (filter.index && filter.index != r->ndm_ifindex)
		return 0;
	if (!(filter.state&r->ndm_state) &&
	    !(r->ndm_flags & NTF_PROXY) &&
	    (r->ndm_state || !(filter.state&0x100)) &&
	     (r->ndm_family != AF_DECnet))
		return 0;

	if (filter.master && !(n->nlmsg_flags & NLM_F_DUMP_FILTERED)) {
		if (logit) {
			logit = 0;
			fprintf(fp,
				"\nWARNING: Kernel does not support filtering by master device\n\n");
		}
	}

	parse_rtattr(tb, NDA_MAX, NDA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));

	if (tb[NDA_DST]) {
		if (filter.pfx.family) {
			inet_prefix dst;

			memset(&dst, 0, sizeof(dst));
			dst.family = r->ndm_family;
			memcpy(&dst.data, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST]));
			if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
				return 0;
		}
	}
	if (filter.unused_only && tb[NDA_CACHEINFO]) {
		struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);

		if (ci->ndm_refcnt)
			return 0;
	}

	if (filter.flushb) {
		struct nlmsghdr *fn;

		if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
			if (flush_update())
				return -1;
		}
		fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
		memcpy(fn, n, n->nlmsg_len);
		fn->nlmsg_type = RTM_DELNEIGH;
		fn->nlmsg_flags = NLM_F_REQUEST;
		fn->nlmsg_seq = ++rth.seq;
		filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
		filter.flushed++;
		if (show_stats < 2)
			return 0;
	}

	if (n->nlmsg_type == RTM_DELNEIGH)
		fprintf(fp, "Deleted ");
	else if (n->nlmsg_type == RTM_GETNEIGH)
		fprintf(fp, "miss ");
	if (tb[NDA_DST]) {
		fprintf(fp, "%s ",
			format_host(r->ndm_family,
				    RTA_PAYLOAD(tb[NDA_DST]),
				    RTA_DATA(tb[NDA_DST]),
				    abuf, sizeof(abuf)));
	}
	if (!filter.index && r->ndm_ifindex)
		fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex));
	if (tb[NDA_LLADDR]) {
		SPRINT_BUF(b1);
		fprintf(fp, "lladdr %s", ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
					      RTA_PAYLOAD(tb[NDA_LLADDR]),
					      ll_index_to_type(r->ndm_ifindex),
					      b1, sizeof(b1)));
	}
	if (r->ndm_flags & NTF_ROUTER) {
		fprintf(fp, " router");
	}
	if (r->ndm_flags & NTF_PROXY) {
		fprintf(fp, " proxy");
	}
	if (tb[NDA_CACHEINFO] && show_stats) {
		struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
		int hz = get_user_hz();

		if (ci->ndm_refcnt)
			printf(" ref %d", ci->ndm_refcnt);
		fprintf(fp, " used %d/%d/%d", ci->ndm_used/hz,
		       ci->ndm_confirmed/hz, ci->ndm_updated/hz);
	}

	if (tb[NDA_PROBES] && show_stats) {
		__u32 p = rta_getattr_u32(tb[NDA_PROBES]);

		fprintf(fp, " probes %u", p);
	}

	if (r->ndm_state) {
		int nud = r->ndm_state;

		fprintf(fp, " ");

#define PRINT_FLAG(f) if (nud & NUD_##f) { \
	nud &= ~NUD_##f; fprintf(fp, #f "%s", nud ? "," : ""); }
		PRINT_FLAG(INCOMPLETE);
		PRINT_FLAG(REACHABLE);
		PRINT_FLAG(STALE);
		PRINT_FLAG(DELAY);
		PRINT_FLAG(PROBE);
		PRINT_FLAG(FAILED);
		PRINT_FLAG(NOARP);
		PRINT_FLAG(PERMANENT);
#undef PRINT_FLAG
	}
	fprintf(fp, "\n");

	fflush(fp);
	return 0;
}

void ipneigh_reset_filter(int ifindex)
{
	memset(&filter, 0, sizeof(filter));
	filter.state = ~0;
	filter.index = ifindex;
}

static int do_show_or_flush(int argc, char **argv, int flush)
{
	struct {
		struct nlmsghdr	n;
		struct ndmsg		ndm;
		char			buf[256];
	} req;
	char *filter_dev = NULL;
	int state_given = 0;

	memset(&req, 0, sizeof(req));

	req.n.nlmsg_type = RTM_GETNEIGH;
	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));

	ipneigh_reset_filter(0);

	if (!filter.family)
		filter.family = preferred_family;

	if (flush) {
		if (argc <= 0) {
			fprintf(stderr, "Flush requires arguments.\n");
			return -1;
		}
		filter.state = ~(NUD_PERMANENT|NUD_NOARP);
	} else
		filter.state = 0xFF & ~NUD_NOARP;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			if (filter_dev)
				duparg("dev", *argv);
			filter_dev = *argv;
		} else if (strcmp(*argv, "master") == 0) {
			int ifindex;

			NEXT_ARG();
			ifindex = ll_name_to_index(*argv);
			if (!ifindex)
				invarg("Device does not exist\n", *argv);
			addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
			filter.master = ifindex;
		} else if (strcmp(*argv, "unused") == 0) {
			filter.unused_only = 1;
		} else if (strcmp(*argv, "nud") == 0) {
			unsigned int state;

			NEXT_ARG();
			if (!state_given) {
				state_given = 1;
				filter.state = 0;
			}
			if (nud_state_a2n(&state, *argv)) {
				if (strcmp(*argv, "all") != 0)
					invarg("nud state is bad", *argv);
				state = ~0;
				if (flush)
					state &= ~NUD_NOARP;
			}
			if (state == 0)
				state = 0x100;
			filter.state |= state;
		} else if (strcmp(*argv, "proxy") == 0)
			req.ndm.ndm_flags = NTF_PROXY;
		else {
			if (strcmp(*argv, "to") == 0) {
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0)
				usage();
			get_prefix(&filter.pfx, *argv, filter.family);
			if (filter.family == AF_UNSPEC)
				filter.family = filter.pfx.family;
		}
		argc--; argv++;
	}

	ll_init_map(&rth);

	if (filter_dev) {
		if ((filter.index = ll_name_to_index(filter_dev)) == 0) {
			fprintf(stderr, "Cannot find device \"%s\"\n", filter_dev);
			return -1;
		}
		addattr32(&req.n, sizeof(req), NDA_IFINDEX, filter.index);
	}

	if (flush) {
		int round = 0;
		char flushb[4096-512];

		filter.flushb = flushb;
		filter.flushp = 0;
		filter.flushe = sizeof(flushb);
		filter.state &= ~NUD_FAILED;

		while (round < MAX_ROUNDS) {
			if (rtnl_wilddump_request(&rth, filter.family, RTM_GETNEIGH) < 0) {
				perror("Cannot send dump request");
				exit(1);
			}
			filter.flushed = 0;
			if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
				fprintf(stderr, "Flush terminated\n");
				exit(1);
			}
			if (filter.flushed == 0) {
				if (show_stats) {
					if (round == 0)
						printf("Nothing to flush.\n");
					else
						printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
				}
				fflush(stdout);
				return 0;
			}
			round++;
			if (flush_update() < 0)
				exit(1);
			if (show_stats) {
				printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
				fflush(stdout);
			}
		}
		printf("*** Flush not complete bailing out after %d rounds\n",
			MAX_ROUNDS);
		return 1;
	}

	req.ndm.ndm_family = filter.family;

	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
		perror("Cannot send dump request");
		exit(1);
	}

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

	return 0;
}

int do_ipneigh(int argc, char **argv)
{
	if (argc > 0) {
		if (matches(*argv, "add") == 0)
			return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1);
		if (matches(*argv, "change") == 0 ||
		    strcmp(*argv, "chg") == 0)
			return ipneigh_modify(RTM_NEWNEIGH, NLM_F_REPLACE, argc-1, argv+1);
		if (matches(*argv, "replace") == 0)
			return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_REPLACE, argc-1, argv+1);
		if (matches(*argv, "delete") == 0)
			return ipneigh_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
		if (matches(*argv, "get") == 0) {
			fprintf(stderr, "Sorry, \"neigh get\" is not implemented :-(\n");
			return -1;
		}
		if (matches(*argv, "show") == 0 ||
		    matches(*argv, "lst") == 0 ||
		    matches(*argv, "list") == 0)
			return do_show_or_flush(argc-1, argv+1, 0);
		if (matches(*argv, "flush") == 0)
			return do_show_or_flush(argc-1, argv+1, 1);
		if (matches(*argv, "help") == 0)
			usage();
	} else
		return do_show_or_flush(0, NULL, 0);

	fprintf(stderr, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* ipneigh.c "ip neigh".
	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	*
aba5acdf SH	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
	16	#include <syslog.h>
	17	#include <fcntl.h>
	18	#include <string.h>
	19	#include <sys/time.h>
aba5acdf SH	20	#include <sys/socket.h>
	21	#include <netinet/in.h>
	22	#include <netinet/ip.h>
	23
	24	#include "rt_names.h"
	25	#include "utils.h"
	26	#include "ip_common.h"
	27
	28	#define NUD_VALID (NUD_PERMANENT\|NUD_NOARP\|NUD_REACHABLE\|NUD_PROBE\|NUD_STALE\|NUD_DELAY)
66081849	29	#define MAX_ROUNDS 10
aba5acdf SH	30
	31	static struct
	32	{
	33	int family;
56f5daac	34	int index;
aba5acdf SH	35	int state;
	36	int unused_only;
	37	inet_prefix pfx;
	38	int flushed;
	39	char *flushb;
	40	int flushp;
	41	int flushe;
0d238ca2	42	int master;
aba5acdf SH	43	} filter;
	44
	45	static void usage(void) __attribute__((noreturn));
	46
	47	static void usage(void)
	48	{
03a0cf20 PS	49	fprintf(stderr, "Usage: ip neigh { add \| del \| change \| replace }\n"
	50	" { ADDR [ lladdr LLADDR ] [ nud STATE ] \| proxy ADDR } [ dev DEV ]\n");
	51	fprintf(stderr, " ip neigh { show \| flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n\n");
	52	fprintf(stderr, "STATE := { permanent \| noarp \| stale \| reachable \| none \|\n"
56f5daac	53	" incomplete \| delay \| probe \| failed }\n");
aba5acdf SH	54	exit(-1);
	55	}
	56
56f5daac	57	static int nud_state_a2n(unsigned int state, const char arg)
aba5acdf SH	58	{
	59	if (matches(arg, "permanent") == 0)
	60	*state = NUD_PERMANENT;
	61	else if (matches(arg, "reachable") == 0)
	62	*state = NUD_REACHABLE;
	63	else if (strcmp(arg, "noarp") == 0)
	64	*state = NUD_NOARP;
	65	else if (strcmp(arg, "none") == 0)
	66	*state = NUD_NONE;
	67	else if (strcmp(arg, "stale") == 0)
	68	*state = NUD_STALE;
	69	else if (strcmp(arg, "incomplete") == 0)
	70	*state = NUD_INCOMPLETE;
	71	else if (strcmp(arg, "delay") == 0)
	72	*state = NUD_DELAY;
	73	else if (strcmp(arg, "probe") == 0)
	74	*state = NUD_PROBE;
	75	else if (matches(arg, "failed") == 0)
	76	*state = NUD_FAILED;
	77	else {
	78	if (get_unsigned(state, arg, 0))
	79	return -1;
56f5daac	80	if (state >= 0x100 \|\| (state&((*state)-1)))
aba5acdf SH	81	return -1;
	82	}
	83	return 0;
	84	}
	85
aba5acdf SH	86	static int flush_update(void)
aba5acdf SH	87	{
f31a37f7	88	if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
1fb0a998	89	perror("Failed to send flush request");
aba5acdf SH	90	return -1;
	91	}
	92	filter.flushp = 0;
	93	return 0;
	94	}
	95
	96
	97	static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
	98	{
aba5acdf	99	struct {
4806867a SH	100	struct nlmsghdr n;
4806867a SH	101	struct ndmsg ndm;
56f5daac	102	char buf[256];
aba5acdf	103	} req;
e834eb8e	104	char *dev = NULL;
aba5acdf	105	int dst_ok = 0;
e834eb8e	106	int dev_ok = 0;
aba5acdf	107	int lladdr_ok = 0;
56f5daac	108	char *lla = NULL;
aba5acdf SH	109	inet_prefix dst;
	110
	111	memset(&req, 0, sizeof(req));
	112
	113	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
	114	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	115	req.n.nlmsg_type = cmd;
	116	req.ndm.ndm_family = preferred_family;
	117	req.ndm.ndm_state = NUD_PERMANENT;
	118
	119	while (argc > 0) {
	120	if (matches(*argv, "lladdr") == 0) {
	121	NEXT_ARG();
	122	if (lladdr_ok)
	123	duparg("lladdr", *argv);
	124	lla = *argv;
	125	lladdr_ok = 1;
	126	} else if (strcmp(*argv, "nud") == 0) {
56f5daac SH	127	unsigned int state;
56f5daac SH	128
aba5acdf SH	129	NEXT_ARG();
	130	if (nud_state_a2n(&state, *argv))
	131	invarg("nud state is bad", *argv);
	132	req.ndm.ndm_state = state;
	133	} else if (matches(*argv, "proxy") == 0) {
	134	NEXT_ARG();
	135	if (matches(*argv, "help") == 0)
	136	usage();
	137	if (dst_ok)
	138	duparg("address", *argv);
	139	get_addr(&dst, *argv, preferred_family);
	140	dst_ok = 1;
e834eb8e	141	dev_ok = 1;
aba5acdf SH	142	req.ndm.ndm_flags \|= NTF_PROXY;
	143	} else if (strcmp(*argv, "dev") == 0) {
	144	NEXT_ARG();
e834eb8e KK	145	dev = *argv;
e834eb8e KK	146	dev_ok = 1;
aba5acdf SH	147	} else {
	148	if (strcmp(*argv, "to") == 0) {
	149	NEXT_ARG();
	150	}
	151	if (matches(*argv, "help") == 0) {
	152	NEXT_ARG();
	153	}
	154	if (dst_ok)
	155	duparg2("to", *argv);
	156	get_addr(&dst, *argv, preferred_family);
	157	dst_ok = 1;
	158	}
	159	argc--; argv++;
	160	}
e834eb8e	161	if (!dev_ok \|\| !dst_ok \|\| dst.family == AF_UNSPEC) {
aba5acdf SH	162	fprintf(stderr, "Device and destination are required arguments.\n");
	163	exit(-1);
	164	}
	165	req.ndm.ndm_family = dst.family;
542b0cc7 SH	166	if (addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen) < 0)
542b0cc7 SH	167	return -1;
aba5acdf SH	168
aba5acdf SH	169	if (lla && strcmp(lla, "null")) {
7b565754	170	char llabuf[20];
aba5acdf SH	171	int l;
	172
	173	l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
542b0cc7 SH	174	if (l < 0)
	175	return -1;
	176
	177	if (addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l) < 0)
	178	return -1;
aba5acdf SH	179	}
aba5acdf SH	180
aba5acdf SH	181	ll_init_map(&rth);
aba5acdf SH	182
e834eb8e KK	183	if (dev && (req.ndm.ndm_ifindex = ll_name_to_index(dev)) == 0) {
e834eb8e KK	184	fprintf(stderr, "Cannot find device \"%s\"\n", dev);
aba5acdf SH	185	return -1;
	186	}
	187
c079e121	188	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
aba5acdf SH	189	exit(2);
aba5acdf SH	190
351efcde	191	return 0;
aba5acdf SH	192	}
	193
	194
50772dc5	195	int print_neigh(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
aba5acdf	196	{
56f5daac	197	FILE fp = (FILE )arg;
aba5acdf SH	198	struct ndmsg *r = NLMSG_DATA(n);
aba5acdf SH	199	int len = n->nlmsg_len;
56f5daac	200	struct rtattr *tb[NDA_MAX+1];
aba5acdf	201	char abuf[256];
0d238ca2	202	static int logit = 1;
aba5acdf	203
1556e29d DS	204	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH &&
1556e29d DS	205	n->nlmsg_type != RTM_GETNEIGH) {
aba5acdf SH	206	fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
aba5acdf SH	207	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
ae665a52	208
aba5acdf SH	209	return 0;
	210	}
	211	len -= NLMSG_LENGTH(sizeof(*r));
	212	if (len < 0) {
	213	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	214	return -1;
	215	}
	216
	217	if (filter.flushb && n->nlmsg_type != RTM_NEWNEIGH)
	218	return 0;
	219
	220	if (filter.family && filter.family != r->ndm_family)
	221	return 0;
	222	if (filter.index && filter.index != r->ndm_ifindex)
	223	return 0;
	224	if (!(filter.state&r->ndm_state) &&
1dac7817	225	!(r->ndm_flags & NTF_PROXY) &&
aba5acdf	226	(r->ndm_state \|\| !(filter.state&0x100)) &&
56f5daac	227	(r->ndm_family != AF_DECnet))
aba5acdf SH	228	return 0;
aba5acdf SH	229
0d238ca2 DA	230	if (filter.master && !(n->nlmsg_flags & NLM_F_DUMP_FILTERED)) {
	231	if (logit) {
	232	logit = 0;
	233	fprintf(fp,
	234	"\nWARNING: Kernel does not support filtering by master device\n\n");
	235	}
	236	}
	237
aba5acdf SH	238	parse_rtattr(tb, NDA_MAX, NDA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
	239
	240	if (tb[NDA_DST]) {
	241	if (filter.pfx.family) {
	242	inet_prefix dst;
56f5daac	243
aba5acdf SH	244	memset(&dst, 0, sizeof(dst));
	245	dst.family = r->ndm_family;
	246	memcpy(&dst.data, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST]));
	247	if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
	248	return 0;
	249	}
	250	}
	251	if (filter.unused_only && tb[NDA_CACHEINFO]) {
	252	struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
56f5daac	253
aba5acdf SH	254	if (ci->ndm_refcnt)
	255	return 0;
	256	}
	257
	258	if (filter.flushb) {
	259	struct nlmsghdr *fn;
56f5daac	260
aba5acdf SH	261	if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
	262	if (flush_update())
	263	return -1;
	264	}
56f5daac	265	fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
aba5acdf SH	266	memcpy(fn, n, n->nlmsg_len);
	267	fn->nlmsg_type = RTM_DELNEIGH;
	268	fn->nlmsg_flags = NLM_F_REQUEST;
351efcde	269	fn->nlmsg_seq = ++rth.seq;
56f5daac	270	filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
aba5acdf SH	271	filter.flushed++;
	272	if (show_stats < 2)
	273	return 0;
	274	}
	275
6ea3ebaf	276	if (n->nlmsg_type == RTM_DELNEIGH)
39ca4879	277	fprintf(fp, "Deleted ");
1556e29d DS	278	else if (n->nlmsg_type == RTM_GETNEIGH)
1556e29d DS	279	fprintf(fp, "miss ");
aba5acdf	280	if (tb[NDA_DST]) {
ae665a52	281	fprintf(fp, "%s ",
aba5acdf SH	282	format_host(r->ndm_family,
	283	RTA_PAYLOAD(tb[NDA_DST]),
	284	RTA_DATA(tb[NDA_DST]),
	285	abuf, sizeof(abuf)));
	286	}
	287	if (!filter.index && r->ndm_ifindex)
	288	fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex));
	289	if (tb[NDA_LLADDR]) {
	290	SPRINT_BUF(b1);
	291	fprintf(fp, "lladdr %s", ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
	292	RTA_PAYLOAD(tb[NDA_LLADDR]),
	293	ll_index_to_type(r->ndm_ifindex),
	294	b1, sizeof(b1)));
	295	}
	296	if (r->ndm_flags & NTF_ROUTER) {
	297	fprintf(fp, " router");
	298	}
1dac7817 TZ	299	if (r->ndm_flags & NTF_PROXY) {
	300	fprintf(fp, " proxy");
	301	}
aba5acdf	302	if (tb[NDA_CACHEINFO] && show_stats) {
aba5acdf	303	struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
6a34d291 SH	304	int hz = get_user_hz();
6a34d291 SH	305
aba5acdf SH	306	if (ci->ndm_refcnt)
	307	printf(" ref %d", ci->ndm_refcnt);
	308	fprintf(fp, " used %d/%d/%d", ci->ndm_used/hz,
	309	ci->ndm_confirmed/hz, ci->ndm_updated/hz);
	310	}
	311
69410a49	312	if (tb[NDA_PROBES] && show_stats) {
ff24746c	313	__u32 p = rta_getattr_u32(tb[NDA_PROBES]);
56f5daac	314
69410a49	315	fprintf(fp, " probes %u", p);
	316	}
	317
aba5acdf	318	if (r->ndm_state) {
435ac6b8	319	int nud = r->ndm_state;
56f5daac	320
435ac6b8	321	fprintf(fp, " ");
	322
	323	#define PRINT_FLAG(f) if (nud & NUD_##f) { \
	324	nud &= ~NUD_##f; fprintf(fp, #f "%s", nud ? "," : ""); }
	325	PRINT_FLAG(INCOMPLETE);
	326	PRINT_FLAG(REACHABLE);
	327	PRINT_FLAG(STALE);
	328	PRINT_FLAG(DELAY);
	329	PRINT_FLAG(PROBE);
	330	PRINT_FLAG(FAILED);
	331	PRINT_FLAG(NOARP);
	332	PRINT_FLAG(PERMANENT);
	333	#undef PRINT_FLAG
aba5acdf SH	334	}
	335	fprintf(fp, "\n");
	336
	337	fflush(fp);
	338	return 0;
	339	}
	340
093b7646	341	void ipneigh_reset_filter(int ifindex)
aba5acdf SH	342	{
	343	memset(&filter, 0, sizeof(filter));
	344	filter.state = ~0;
093b7646	345	filter.index = ifindex;
aba5acdf SH	346	}
aba5acdf SH	347
d1f28cf1	348	static int do_show_or_flush(int argc, char **argv, int flush)
aba5acdf	349	{
0d238ca2 DA	350	struct {
	351	struct nlmsghdr n;
	352	struct ndmsg ndm;
56f5daac	353	char buf[256];
0d238ca2	354	} req;
aba5acdf	355	char *filter_dev = NULL;
aba5acdf	356	int state_given = 0;
0d238ca2 DA	357
	358	memset(&req, 0, sizeof(req));
	359
	360	req.n.nlmsg_type = RTM_GETNEIGH;
	361	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
aba5acdf	362
093b7646	363	ipneigh_reset_filter(0);
aba5acdf SH	364
	365	if (!filter.family)
	366	filter.family = preferred_family;
	367
	368	if (flush) {
	369	if (argc <= 0) {
	370	fprintf(stderr, "Flush requires arguments.\n");
	371	return -1;
	372	}
	373	filter.state = ~(NUD_PERMANENT\|NUD_NOARP);
	374	} else
	375	filter.state = 0xFF & ~NUD_NOARP;
	376
	377	while (argc > 0) {
	378	if (strcmp(*argv, "dev") == 0) {
	379	NEXT_ARG();
	380	if (filter_dev)
	381	duparg("dev", *argv);
	382	filter_dev = *argv;
0d238ca2 DA	383	} else if (strcmp(*argv, "master") == 0) {
0d238ca2 DA	384	int ifindex;
56f5daac	385
0d238ca2 DA	386	NEXT_ARG();
	387	ifindex = ll_name_to_index(*argv);
	388	if (!ifindex)
	389	invarg("Device does not exist\n", *argv);
	390	addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
	391	filter.master = ifindex;
aba5acdf SH	392	} else if (strcmp(*argv, "unused") == 0) {
	393	filter.unused_only = 1;
	394	} else if (strcmp(*argv, "nud") == 0) {
56f5daac SH	395	unsigned int state;
56f5daac SH	396
aba5acdf SH	397	NEXT_ARG();
	398	if (!state_given) {
	399	state_given = 1;
	400	filter.state = 0;
	401	}
	402	if (nud_state_a2n(&state, *argv)) {
	403	if (strcmp(*argv, "all") != 0)
	404	invarg("nud state is bad", *argv);
	405	state = ~0;
	406	if (flush)
	407	state &= ~NUD_NOARP;
	408	}
	409	if (state == 0)
	410	state = 0x100;
	411	filter.state \|= state;
1dac7817	412	} else if (strcmp(*argv, "proxy") == 0)
0d238ca2	413	req.ndm.ndm_flags = NTF_PROXY;
1dac7817	414	else {
aba5acdf SH	415	if (strcmp(*argv, "to") == 0) {
	416	NEXT_ARG();
	417	}
	418	if (matches(*argv, "help") == 0)
	419	usage();
	420	get_prefix(&filter.pfx, *argv, filter.family);
	421	if (filter.family == AF_UNSPEC)
	422	filter.family = filter.pfx.family;
	423	}
	424	argc--; argv++;
	425	}
	426
aba5acdf SH	427	ll_init_map(&rth);
	428
	429	if (filter_dev) {
	430	if ((filter.index = ll_name_to_index(filter_dev)) == 0) {
	431	fprintf(stderr, "Cannot find device \"%s\"\n", filter_dev);
	432	return -1;
	433	}
b8c75324	434	addattr32(&req.n, sizeof(req), NDA_IFINDEX, filter.index);
aba5acdf SH	435	}
	436
	437	if (flush) {
	438	int round = 0;
	439	char flushb[4096-512];
	440
	441	filter.flushb = flushb;
	442	filter.flushp = 0;
	443	filter.flushe = sizeof(flushb);
aba5acdf SH	444	filter.state &= ~NUD_FAILED;
aba5acdf SH	445
66081849	446	while (round < MAX_ROUNDS) {
aba5acdf SH	447	if (rtnl_wilddump_request(&rth, filter.family, RTM_GETNEIGH) < 0) {
	448	perror("Cannot send dump request");
	449	exit(1);
	450	}
	451	filter.flushed = 0;
cd70f3f5	452	if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
aba5acdf SH	453	fprintf(stderr, "Flush terminated\n");
	454	exit(1);
	455	}
	456	if (filter.flushed == 0) {
f0b34d2d AH	457	if (show_stats) {
	458	if (round == 0)
	459	printf("Nothing to flush.\n");
	460	else
56f5daac	461	printf("* Flush is complete after %d round%s *\n", round, round > 1?"s":"");
f0b34d2d	462	}
aba5acdf SH	463	fflush(stdout);
	464	return 0;
	465	}
	466	round++;
	467	if (flush_update() < 0)
	468	exit(1);
	469	if (show_stats) {
	470	printf("\n* Round %d, deleting %d entries *\n", round, filter.flushed);
	471	fflush(stdout);
	472	}
	473	}
66081849 SH	474	printf("*** Flush not complete bailing out after %d rounds\n",
	475	MAX_ROUNDS);
	476	return 1;
aba5acdf SH	477	}
aba5acdf SH	478
0d238ca2	479	req.ndm.ndm_family = filter.family;
1dac7817	480
0d238ca2	481	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
aba5acdf SH	482	perror("Cannot send dump request");
	483	exit(1);
	484	}
	485
cd70f3f5	486	if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
aba5acdf SH	487	fprintf(stderr, "Dump terminated\n");
	488	exit(1);
	489	}
	490
	491	return 0;
	492	}
	493
	494	int do_ipneigh(int argc, char **argv)
	495	{
	496	if (argc > 0) {
	497	if (matches(*argv, "add") == 0)
	498	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_EXCL, argc-1, argv+1);
	499	if (matches(*argv, "change") == 0 \|\|
	500	strcmp(*argv, "chg") == 0)
	501	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_REPLACE, argc-1, argv+1);
	502	if (matches(*argv, "replace") == 0)
	503	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_REPLACE, argc-1, argv+1);
	504	if (matches(*argv, "delete") == 0)
	505	return ipneigh_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
	506	if (matches(*argv, "get") == 0) {
	507	fprintf(stderr, "Sorry, \"neigh get\" is not implemented :-(\n");
	508	return -1;
	509	}
	510	if (matches(*argv, "show") == 0 \|\|
	511	matches(*argv, "lst") == 0 \|\|
	512	matches(*argv, "list") == 0)
	513	return do_show_or_flush(argc-1, argv+1, 0);
	514	if (matches(*argv, "flush") == 0)
	515	return do_show_or_flush(argc-1, argv+1, 1);
	516	if (matches(*argv, "help") == 0)
	517	usage();
	518	} else
	519	return do_show_or_flush(0, NULL, 0);
	520
	521	fprintf(stderr, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv);
	522	exit(-1);
	523	}