[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>
 *
 *
 * Changes:
 *
 * Rani Assaf <rani@magic.metawire.com> 980929:	resolve addresses
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <string.h>
#include <sys/time.h>
#include <net/if.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)

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

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

static void usage(void)
{
	fprintf(stderr, "Usage: ip neigh { add | del | change | replace } { ADDR [ lladdr LLADDR ]\n"
		        "          [ nud { permanent | noarp | stale | reachable } ]\n"
		        "          | proxy ADDR } [ dev DEV ]\n");
	fprintf(stderr, "       ip neigh {show|flush} [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n");
	exit(-1);
}

int nud_state_a2n(unsigned *state, 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(filter.rth, filter.flushb, filter.flushp) < 0) {
		perror("Failed to send flush request\n");
		return -1;
	}
	filter.flushp = 0;
	return 0;
}


static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
{
	struct rtnl_handle rth;
	struct {
		struct nlmsghdr 	n;
		struct ndmsg 		ndm;
		char   			buf[256];
	} req;
	char  *d = NULL;
	int dst_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 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;
			req.ndm.ndm_flags |= NTF_PROXY;
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			d = *argv;
		} 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 (d == NULL || !dst_ok || dst.family == AF_UNSPEC) {
		fprintf(stderr, "Device and destination are required arguments.\n");
		exit(-1);
	}
	req.ndm.ndm_family = dst.family;
	addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen);

	if (lla && strcmp(lla, "null")) {
		__u8 llabuf[16];
		int l;

		l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
		addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l);
	}

	if (rtnl_open(&rth, 0) < 0)
		exit(1);

	ll_init_map(&rth);

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

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

	exit(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];

	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) {
		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_state || !(filter.state&0x100)) &&
             (r->ndm_family != AF_DECnet))
		return 0;

	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 = ++filter.rth->seq;
		filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
		filter.flushed++;
		if (show_stats < 2)
			return 0;
	}

	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 (tb[NDA_CACHEINFO] && show_stats) {
		static int hz;
		struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
		if (!hz)
			hz = get_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 (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()
{
	memset(&filter, 0, sizeof(filter));
	filter.state = ~0;
}

int do_show_or_flush(int argc, char **argv, int flush)
{
	char *filter_dev = NULL;
	struct rtnl_handle rth;
	int state_given = 0;

	ipneigh_reset_filter();

	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, "unused") == 0) {
			filter.unused_only = 1;
		} else if (strcmp(*argv, "nud") == 0) {
			unsigned 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, "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++;
	}

	if (rtnl_open(&rth, 0) < 0)
		exit(1);

	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;
		}
	}

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

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

		for (;;) {
			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, NULL, NULL) < 0) {
				fprintf(stderr, "Flush terminated\n");
				exit(1);
			}
			if (filter.flushed == 0) {
				if (round == 0) {
					fprintf(stderr, "Nothing to flush.\n");
				} else if (show_stats)
					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);
			}
		}
	}

	if (rtnl_wilddump_request(&rth, filter.family, RTM_GETNEIGH) < 0) {
		perror("Cannot send dump request");
		exit(1);
	}

	if (rtnl_dump_filter(&rth, print_neigh, stdout, NULL, NULL) < 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	*
	11	*
	12	* Changes:
	13	*
	14	* Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
	15	*/
	16
	17	#include <stdio.h>
	18	#include <stdlib.h>
	19	#include <unistd.h>
	20	#include <syslog.h>
	21	#include <fcntl.h>
	22	#include <string.h>
	23	#include <sys/time.h>
	24	#include <net/if.h>
	25	#include <sys/socket.h>
	26	#include <netinet/in.h>
	27	#include <netinet/ip.h>
	28
	29	#include "rt_names.h"
	30	#include "utils.h"
	31	#include "ip_common.h"
	32
	33	#define NUD_VALID (NUD_PERMANENT\|NUD_NOARP\|NUD_REACHABLE\|NUD_PROBE\|NUD_STALE\|NUD_DELAY)
	34
	35	static struct
	36	{
	37	int family;
	38	int index;
	39	int state;
	40	int unused_only;
	41	inet_prefix pfx;
	42	int flushed;
	43	char *flushb;
	44	int flushp;
	45	int flushe;
	46	struct rtnl_handle *rth;
	47	} filter;
	48
	49	static void usage(void) __attribute__((noreturn));
	50
	51	static void usage(void)
	52	{
	53	fprintf(stderr, "Usage: ip neigh { add \| del \| change \| replace } { ADDR [ lladdr LLADDR ]\n"
	54	" [ nud { permanent \| noarp \| stale \| reachable } ]\n"
	55	" \| proxy ADDR } [ dev DEV ]\n");
	56	fprintf(stderr, " ip neigh {show\|flush} [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n");
	57	exit(-1);
	58	}
	59
	60	int nud_state_a2n(unsigned state, char arg)
	61	{
	62	if (matches(arg, "permanent") == 0)
	63	*state = NUD_PERMANENT;
	64	else if (matches(arg, "reachable") == 0)
65	*state = NUD_REACHABLE;
66	else if (strcmp(arg, "noarp") == 0)
67	*state = NUD_NOARP;
68	else if (strcmp(arg, "none") == 0)
69	*state = NUD_NONE;
70	else if (strcmp(arg, "stale") == 0)
71	*state = NUD_STALE;
72	else if (strcmp(arg, "incomplete") == 0)
73	*state = NUD_INCOMPLETE;
74	else if (strcmp(arg, "delay") == 0)
75	*state = NUD_DELAY;
76	else if (strcmp(arg, "probe") == 0)
77	*state = NUD_PROBE;
78	else if (matches(arg, "failed") == 0)
79	*state = NUD_FAILED;
80	else {
81	if (get_unsigned(state, arg, 0))
82	return -1;
83	if (state>=0x100 \|\| (state&((*state)-1)))
84	return -1;
85	}
86	return 0;
87	}
88
aba5acdf SH	89	static int flush_update(void)
	90	{
	91	if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
	92	perror("Failed to send flush request\n");
	93	return -1;
	94	}
	95	filter.flushp = 0;
	96	return 0;
	97	}
	98
	99
	100	static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
	101	{
	102	struct rtnl_handle rth;
	103	struct {
	104	struct nlmsghdr n;
	105	struct ndmsg ndm;
	106	char buf[256];
	107	} req;
	108	char *d = NULL;
	109	int dst_ok = 0;
	110	int lladdr_ok = 0;
	111	char * lla = NULL;
	112	inet_prefix dst;
	113
	114	memset(&req, 0, sizeof(req));
	115
	116	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
	117	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	118	req.n.nlmsg_type = cmd;
	119	req.ndm.ndm_family = preferred_family;
	120	req.ndm.ndm_state = NUD_PERMANENT;
	121
	122	while (argc > 0) {
	123	if (matches(*argv, "lladdr") == 0) {
	124	NEXT_ARG();
	125	if (lladdr_ok)
	126	duparg("lladdr", *argv);
	127	lla = *argv;
	128	lladdr_ok = 1;
	129	} else if (strcmp(*argv, "nud") == 0) {
	130	unsigned state;
	131	NEXT_ARG();
	132	if (nud_state_a2n(&state, *argv))
	133	invarg("nud state is bad", *argv);
	134	req.ndm.ndm_state = state;
	135	} else if (matches(*argv, "proxy") == 0) {
	136	NEXT_ARG();
	137	if (matches(*argv, "help") == 0)
	138	usage();
	139	if (dst_ok)
	140	duparg("address", *argv);
	141	get_addr(&dst, *argv, preferred_family);
	142	dst_ok = 1;
	143	req.ndm.ndm_flags \|= NTF_PROXY;
	144	} else if (strcmp(*argv, "dev") == 0) {
	145	NEXT_ARG();
	146	d = *argv;
	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	}
161	if (d == NULL \|\| !dst_ok \|\| dst.family == AF_UNSPEC) {
162	fprintf(stderr, "Device and destination are required arguments.\n");
163	exit(-1);
164	}
165	req.ndm.ndm_family = dst.family;
166	addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen);
167
168	if (lla && strcmp(lla, "null")) {
169	__u8 llabuf[16];
170	int l;
171
172	l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
173	addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l);
174	}
175
176	if (rtnl_open(&rth, 0) < 0)
177	exit(1);
178
179	ll_init_map(&rth);
180
181	if ((req.ndm.ndm_ifindex = ll_name_to_index(d)) == 0) {
182	fprintf(stderr, "Cannot find device \"%s\"\n", d);
183	return -1;
184	}
185
186	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
187	exit(2);
188
189	exit(0);
190	}
191
192
50772dc5	193	int print_neigh(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
aba5acdf SH	194	{
	195	FILE fp = (FILE)arg;
	196	struct ndmsg *r = NLMSG_DATA(n);
	197	int len = n->nlmsg_len;
	198	struct rtattr * tb[NDA_MAX+1];
	199	char abuf[256];
	200
	201	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) {
	202	fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
	203	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
	204
	205	return 0;
	206	}
	207	len -= NLMSG_LENGTH(sizeof(*r));
	208	if (len < 0) {
	209	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	210	return -1;
	211	}
	212
	213	if (filter.flushb && n->nlmsg_type != RTM_NEWNEIGH)
	214	return 0;
	215
	216	if (filter.family && filter.family != r->ndm_family)
	217	return 0;
	218	if (filter.index && filter.index != r->ndm_ifindex)
	219	return 0;
	220	if (!(filter.state&r->ndm_state) &&
	221	(r->ndm_state \|\| !(filter.state&0x100)) &&
	222	(r->ndm_family != AF_DECnet))
	223	return 0;
	224
aba5acdf SH	225	parse_rtattr(tb, NDA_MAX, NDA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
	226
	227	if (tb[NDA_DST]) {
	228	if (filter.pfx.family) {
	229	inet_prefix dst;
	230	memset(&dst, 0, sizeof(dst));
	231	dst.family = r->ndm_family;
	232	memcpy(&dst.data, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST]));
	233	if (inet_addr_match(&dst, &filter.pfx, filter.pfx.bitlen))
	234	return 0;
	235	}
	236	}
	237	if (filter.unused_only && tb[NDA_CACHEINFO]) {
	238	struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
	239	if (ci->ndm_refcnt)
	240	return 0;
	241	}
	242
	243	if (filter.flushb) {
	244	struct nlmsghdr *fn;
	245	if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
	246	if (flush_update())
	247	return -1;
	248	}
	249	fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
	250	memcpy(fn, n, n->nlmsg_len);
	251	fn->nlmsg_type = RTM_DELNEIGH;
	252	fn->nlmsg_flags = NLM_F_REQUEST;
	253	fn->nlmsg_seq = ++filter.rth->seq;
	254	filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
	255	filter.flushed++;
	256	if (show_stats < 2)
	257	return 0;
	258	}
	259
	260	if (tb[NDA_DST]) {
	261	fprintf(fp, "%s ",
	262	format_host(r->ndm_family,
	263	RTA_PAYLOAD(tb[NDA_DST]),
	264	RTA_DATA(tb[NDA_DST]),
	265	abuf, sizeof(abuf)));
	266	}
	267	if (!filter.index && r->ndm_ifindex)
	268	fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex));
	269	if (tb[NDA_LLADDR]) {
	270	SPRINT_BUF(b1);
	271	fprintf(fp, "lladdr %s", ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
	272	RTA_PAYLOAD(tb[NDA_LLADDR]),
	273	ll_index_to_type(r->ndm_ifindex),
	274	b1, sizeof(b1)));
	275	}
	276	if (r->ndm_flags & NTF_ROUTER) {
	277	fprintf(fp, " router");
	278	}
	279	if (tb[NDA_CACHEINFO] && show_stats) {
	280	static int hz;
	281	struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
	282	if (!hz)
	283	hz = get_hz();
	284	if (ci->ndm_refcnt)
	285	printf(" ref %d", ci->ndm_refcnt);
	286	fprintf(fp, " used %d/%d/%d", ci->ndm_used/hz,
	287	ci->ndm_confirmed/hz, ci->ndm_updated/hz);
	288	}
289
290	if (r->ndm_state) {
435ac6b8	291	int nud = r->ndm_state;
	292	fprintf(fp, " ");
	293
	294	#define PRINT_FLAG(f) if (nud & NUD_##f) { \
	295	nud &= ~NUD_##f; fprintf(fp, #f "%s", nud ? "," : ""); }
	296	PRINT_FLAG(INCOMPLETE);
	297	PRINT_FLAG(REACHABLE);
	298	PRINT_FLAG(STALE);
	299	PRINT_FLAG(DELAY);
	300	PRINT_FLAG(PROBE);
	301	PRINT_FLAG(FAILED);
	302	PRINT_FLAG(NOARP);
	303	PRINT_FLAG(PERMANENT);
	304	#undef PRINT_FLAG
aba5acdf SH	305	}
	306	fprintf(fp, "\n");
	307
	308	fflush(fp);
	309	return 0;
	310	}
	311
	312	void ipneigh_reset_filter()
	313	{
	314	memset(&filter, 0, sizeof(filter));
	315	filter.state = ~0;
	316	}
	317
	318	int do_show_or_flush(int argc, char **argv, int flush)
	319	{
	320	char *filter_dev = NULL;
	321	struct rtnl_handle rth;
	322	int state_given = 0;
	323
	324	ipneigh_reset_filter();
	325
	326	if (!filter.family)
	327	filter.family = preferred_family;
	328
	329	if (flush) {
	330	if (argc <= 0) {
	331	fprintf(stderr, "Flush requires arguments.\n");
	332	return -1;
	333	}
	334	filter.state = ~(NUD_PERMANENT\|NUD_NOARP);
	335	} else
	336	filter.state = 0xFF & ~NUD_NOARP;
	337
	338	while (argc > 0) {
	339	if (strcmp(*argv, "dev") == 0) {
	340	NEXT_ARG();
	341	if (filter_dev)
	342	duparg("dev", *argv);
	343	filter_dev = *argv;
	344	} else if (strcmp(*argv, "unused") == 0) {
	345	filter.unused_only = 1;
	346	} else if (strcmp(*argv, "nud") == 0) {
	347	unsigned state;
	348	NEXT_ARG();
	349	if (!state_given) {
	350	state_given = 1;
	351	filter.state = 0;
	352	}
	353	if (nud_state_a2n(&state, *argv)) {
	354	if (strcmp(*argv, "all") != 0)
	355	invarg("nud state is bad", *argv);
	356	state = ~0;
	357	if (flush)
	358	state &= ~NUD_NOARP;
	359	}
	360	if (state == 0)
	361	state = 0x100;
	362	filter.state \|= state;
	363	} else {
	364	if (strcmp(*argv, "to") == 0) {
	365	NEXT_ARG();
	366	}
	367	if (matches(*argv, "help") == 0)
	368	usage();
369	get_prefix(&filter.pfx, *argv, filter.family);
370	if (filter.family == AF_UNSPEC)
371	filter.family = filter.pfx.family;
372	}
373	argc--; argv++;
374	}
375
376	if (rtnl_open(&rth, 0) < 0)
377	exit(1);
378
379	ll_init_map(&rth);
380
381	if (filter_dev) {
382	if ((filter.index = ll_name_to_index(filter_dev)) == 0) {
383	fprintf(stderr, "Cannot find device \"%s\"\n", filter_dev);
384	return -1;
385	}
386	}
387
388	if (flush) {
389	int round = 0;
390	char flushb[4096-512];
391
392	filter.flushb = flushb;
393	filter.flushp = 0;
394	filter.flushe = sizeof(flushb);
395	filter.rth = &rth;
396	filter.state &= ~NUD_FAILED;
397
398	for (;;) {
399	if (rtnl_wilddump_request(&rth, filter.family, RTM_GETNEIGH) < 0) {
400	perror("Cannot send dump request");
401	exit(1);
402	}
403	filter.flushed = 0;
404	if (rtnl_dump_filter(&rth, print_neigh, stdout, NULL, NULL) < 0) {
405	fprintf(stderr, "Flush terminated\n");
406	exit(1);
407	}
408	if (filter.flushed == 0) {
409	if (round == 0) {
410	fprintf(stderr, "Nothing to flush.\n");
411	} else if (show_stats)
412	printf("* Flush is complete after %d round%s *\n", round, round>1?"s":"");
413	fflush(stdout);
414	return 0;
415	}
416	round++;
417	if (flush_update() < 0)
418	exit(1);
419	if (show_stats) {
420	printf("\n* Round %d, deleting %d entries *\n", round, filter.flushed);
421	fflush(stdout);
422	}
423	}
424	}
425
426	if (rtnl_wilddump_request(&rth, filter.family, RTM_GETNEIGH) < 0) {
427	perror("Cannot send dump request");
428	exit(1);
429	}
430
431	if (rtnl_dump_filter(&rth, print_neigh, stdout, NULL, NULL) < 0) {
432	fprintf(stderr, "Dump terminated\n");
433	exit(1);
434	}
435
436	return 0;
437	}
438
439	int do_ipneigh(int argc, char **argv)
440	{
441	if (argc > 0) {
442	if (matches(*argv, "add") == 0)
443	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_EXCL, argc-1, argv+1);
444	if (matches(*argv, "change") == 0 \|\|
445	strcmp(*argv, "chg") == 0)
446	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_REPLACE, argc-1, argv+1);
447	if (matches(*argv, "replace") == 0)
448	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_REPLACE, argc-1, argv+1);
449	if (matches(*argv, "delete") == 0)
450	return ipneigh_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
451	if (matches(*argv, "get") == 0) {
452	fprintf(stderr, "Sorry, \"neigh get\" is not implemented :-(\n");
453	return -1;
454	}
455	if (matches(*argv, "show") == 0 \|\|
456	matches(*argv, "lst") == 0 \|\|
457	matches(*argv, "list") == 0)
458	return do_show_or_flush(argc-1, argv+1, 0);
459	if (matches(*argv, "flush") == 0)
460	return do_show_or_flush(argc-1, argv+1, 1);
461	if (matches(*argv, "help") == 0)
462	usage();
463	} else
464	return do_show_or_flush(0, NULL, 0);
465
466	fprintf(stderr, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv);
467	exit(-1);
468	}