ipntable.c revision ae665a522bd46bea44c5ea84c89c8b1731954170 
1/*
2 * Copyright (C)2006 USAGI/WIDE Project
3 *
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.
8 *
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.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17 */
18/*
19 * based on ipneigh.c
20 */
21/*
22 * Authors:
23 *	Masahide NAKAMURA @USAGI
24 */
25
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29#include <sys/time.h>
30#include <time.h>
31
32#include "utils.h"
33#include "ip_common.h"
34
35static struct
36{
37	int family;
38        int index;
39#define NONE_DEV	(-1)
40	char name[1024];
41} filter;
42
43static void usage(void) __attribute__((noreturn));
44
45static void usage(void)
46{
47	fprintf(stderr,
48		"Usage: ip ntable change name NAME [ dev DEV ]\n"
49		"          [ thresh1 VAL ] [ thresh2 VAL ] [ thresh3 VAL ] [ gc_int MSEC ]\n"
50		"          [ PARMS ]\n"
51		"Usage: ip ntable show [ dev DEV ] [ name NAME ]\n"
52
53		"PARMS := [ base_reachable MSEC ] [ retrans MSEC ] [ gc_stale MSEC ]\n"
54		"         [ delay_probe MSEC ] [ queue LEN ]\n"
55		"         [ app_probs VAL ] [ ucast_probes VAL ] [ mcast_probes VAL ]\n"
56		"         [ anycast_delay MSEC ] [ proxy_delay MSEC ] [ proxy_queue LEN ]\n"
57		"         [ locktime MSEC ]\n"
58		);
59
60	exit(-1);
61}
62
63static int ipntable_modify(int cmd, int flags, int argc, char **argv)
64{
65	struct {
66		struct nlmsghdr 	n;
67		struct ndtmsg		ndtm;
68		char   			buf[1024];
69	} req;
70	char *namep = NULL;
71	char *threshsp = NULL;
72	char *gc_intp = NULL;
73	char parms_buf[1024];
74	struct rtattr *parms_rta = (struct rtattr *)parms_buf;
75	int parms_change = 0;
76
77	memset(&req, 0, sizeof(req));
78
79	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg));
80	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
81	req.n.nlmsg_type = cmd;
82
83	req.ndtm.ndtm_family = preferred_family;
84	req.ndtm.ndtm_pad1 = 0;
85	req.ndtm.ndtm_pad2 = 0;
86
87	memset(&parms_buf, 0, sizeof(parms_buf));
88
89	parms_rta->rta_type = NDTA_PARMS;
90	parms_rta->rta_len = RTA_LENGTH(0);
91
92	while (argc > 0) {
93		if (strcmp(*argv, "name") == 0) {
94			int len;
95
96			NEXT_ARG();
97			if (namep)
98				duparg("NAME", *argv);
99
100			namep = *argv;
101			len = strlen(namep) + 1;
102			addattr_l(&req.n, sizeof(req), NDTA_NAME, namep, len);
103		} else if (strcmp(*argv, "thresh1") == 0) {
104			__u32 thresh1;
105
106			NEXT_ARG();
107			threshsp = *argv;
108
109			if (get_u32(&thresh1, *argv, 0))
110				invarg("\"thresh1\" value is invalid", *argv);
111
112			addattr32(&req.n, sizeof(req), NDTA_THRESH1, thresh1);
113		} else if (strcmp(*argv, "thresh2") == 0) {
114			__u32 thresh2;
115
116			NEXT_ARG();
117			threshsp = *argv;
118
119			if (get_u32(&thresh2, *argv, 0))
120				invarg("\"thresh2\" value is invalid", *argv);
121
122			addattr32(&req.n, sizeof(req), NDTA_THRESH2, thresh2);
123		} else if (strcmp(*argv, "thresh3") == 0) {
124			__u32 thresh3;
125
126			NEXT_ARG();
127			threshsp = *argv;
128
129			if (get_u32(&thresh3, *argv, 0))
130				invarg("\"thresh3\" value is invalid", *argv);
131
132			addattr32(&req.n, sizeof(req), NDTA_THRESH3, thresh3);
133		} else if (strcmp(*argv, "gc_int") == 0) {
134			__u64 gc_int;
135
136			NEXT_ARG();
137			gc_intp = *argv;
138
139			if (get_u64(&gc_int, *argv, 0))
140				invarg("\"gc_int\" value is invalid", *argv);
141
142			addattr_l(&req.n, sizeof(req), NDTA_GC_INTERVAL,
143				  &gc_int, sizeof(gc_int));
144		} else if (strcmp(*argv, "dev") == 0) {
145			__u32 ifindex;
146
147			NEXT_ARG();
148			ifindex = ll_name_to_index(*argv);
149			if (ifindex == 0) {
150				fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
151				return -1;
152			}
153
154			rta_addattr32(parms_rta, sizeof(parms_buf),
155				      NDTPA_IFINDEX, ifindex);
156		} else if (strcmp(*argv, "base_reachable") == 0) {
157			__u64 breachable;
158
159			NEXT_ARG();
160
161			if (get_u64(&breachable, *argv, 0))
162				invarg("\"base_reachable\" value is invalid", *argv);
163
164			rta_addattr_l(parms_rta, sizeof(parms_buf),
165				      NDTPA_BASE_REACHABLE_TIME,
166				      &breachable, sizeof(breachable));
167			parms_change = 1;
168		} else if (strcmp(*argv, "retrans") == 0) {
169			__u64 retrans;
170
171			NEXT_ARG();
172
173			if (get_u64(&retrans, *argv, 0))
174				invarg("\"retrans\" value is invalid", *argv);
175
176			rta_addattr_l(parms_rta, sizeof(parms_buf),
177				      NDTPA_RETRANS_TIME,
178				      &retrans, sizeof(retrans));
179			parms_change = 1;
180		} else if (strcmp(*argv, "gc_stale") == 0) {
181			__u64 gc_stale;
182
183			NEXT_ARG();
184
185			if (get_u64(&gc_stale, *argv, 0))
186				invarg("\"gc_stale\" value is invalid", *argv);
187
188			rta_addattr_l(parms_rta, sizeof(parms_buf),
189				      NDTPA_GC_STALETIME,
190				      &gc_stale, sizeof(gc_stale));
191			parms_change = 1;
192		} else if (strcmp(*argv, "delay_probe") == 0) {
193			__u64 delay_probe;
194
195			NEXT_ARG();
196
197			if (get_u64(&delay_probe, *argv, 0))
198				invarg("\"delay_probe\" value is invalid", *argv);
199
200			rta_addattr_l(parms_rta, sizeof(parms_buf),
201				      NDTPA_DELAY_PROBE_TIME,
202				      &delay_probe, sizeof(delay_probe));
203			parms_change = 1;
204		} else if (strcmp(*argv, "queue") == 0) {
205			__u32 queue;
206
207			NEXT_ARG();
208
209			if (get_u32(&queue, *argv, 0))
210				invarg("\"queue\" value is invalid", *argv);
211
212			if (!parms_rta)
213				parms_rta = (struct rtattr *)&parms_buf;
214			rta_addattr32(parms_rta, sizeof(parms_buf),
215				      NDTPA_QUEUE_LEN, queue);
216			parms_change = 1;
217		} else if (strcmp(*argv, "app_probes") == 0) {
218			__u32 aprobe;
219
220			NEXT_ARG();
221
222			if (get_u32(&aprobe, *argv, 0))
223				invarg("\"app_probes\" value is invalid", *argv);
224
225			rta_addattr32(parms_rta, sizeof(parms_buf),
226				      NDTPA_APP_PROBES, aprobe);
227			parms_change = 1;
228		} else if (strcmp(*argv, "ucast_probes") == 0) {
229			__u32 uprobe;
230
231			NEXT_ARG();
232
233			if (get_u32(&uprobe, *argv, 0))
234				invarg("\"ucast_probes\" value is invalid", *argv);
235
236			rta_addattr32(parms_rta, sizeof(parms_buf),
237				      NDTPA_UCAST_PROBES, uprobe);
238			parms_change = 1;
239		} else if (strcmp(*argv, "mcast_probes") == 0) {
240			__u32 mprobe;
241
242			NEXT_ARG();
243
244			if (get_u32(&mprobe, *argv, 0))
245				invarg("\"mcast_probes\" value is invalid", *argv);
246
247			rta_addattr32(parms_rta, sizeof(parms_buf),
248				      NDTPA_MCAST_PROBES, mprobe);
249			parms_change = 1;
250		} else if (strcmp(*argv, "anycast_delay") == 0) {
251			__u64 anycast_delay;
252
253			NEXT_ARG();
254
255			if (get_u64(&anycast_delay, *argv, 0))
256				invarg("\"anycast_delay\" value is invalid", *argv);
257
258			rta_addattr_l(parms_rta, sizeof(parms_buf),
259				      NDTPA_ANYCAST_DELAY,
260				      &anycast_delay, sizeof(anycast_delay));
261			parms_change = 1;
262		} else if (strcmp(*argv, "proxy_delay") == 0) {
263			__u64 proxy_delay;
264
265			NEXT_ARG();
266
267			if (get_u64(&proxy_delay, *argv, 0))
268				invarg("\"proxy_delay\" value is invalid", *argv);
269
270			rta_addattr_l(parms_rta, sizeof(parms_buf),
271				      NDTPA_PROXY_DELAY,
272				      &proxy_delay, sizeof(proxy_delay));
273			parms_change = 1;
274		} else if (strcmp(*argv, "proxy_queue") == 0) {
275			__u32 pqueue;
276
277			NEXT_ARG();
278
279			if (get_u32(&pqueue, *argv, 0))
280				invarg("\"proxy_queue\" value is invalid", *argv);
281
282			rta_addattr32(parms_rta, sizeof(parms_buf),
283				      NDTPA_PROXY_QLEN, pqueue);
284			parms_change = 1;
285		} else if (strcmp(*argv, "locktime") == 0) {
286			__u64 locktime;
287
288			NEXT_ARG();
289
290			if (get_u64(&locktime, *argv, 0))
291				invarg("\"locktime\" value is invalid", *argv);
292
293			rta_addattr_l(parms_rta, sizeof(parms_buf),
294				      NDTPA_LOCKTIME,
295				      &locktime, sizeof(locktime));
296			parms_change = 1;
297		} else {
298			invarg("unknown", *argv);
299		}
300
301		argc--; argv++;
302	}
303
304	if (!namep)
305		missarg("NAME");
306	if (!threshsp && !gc_intp && !parms_change) {
307		fprintf(stderr, "Not enough information: changable attributes required.\n");
308		exit(-1);
309	}
310
311	if (parms_rta->rta_len > RTA_LENGTH(0)) {
312		addattr_l(&req.n, sizeof(req), NDTA_PARMS, RTA_DATA(parms_rta),
313			  RTA_PAYLOAD(parms_rta));
314	}
315
316	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
317		exit(2);
318
319	return 0;
320}
321
322static const char *ntable_strtime_delta(__u32 msec)
323{
324	static char str[32];
325	struct timeval now;
326	time_t t;
327	struct tm *tp;
328
329	if (msec == 0)
330		goto error;
331
332	memset(&now, 0, sizeof(now));
333
334	if (gettimeofday(&now, NULL) < 0) {
335		perror("gettimeofday");
336		goto error;
337	}
338
339	t = now.tv_sec - (msec / 1000);
340	tp = localtime(&t);
341	if (!tp)
342		goto error;
343
344	strftime(str, sizeof(str), "%Y-%m-%d %T", tp);
345
346	return str;
347 error:
348	strcpy(str, "(error)");
349	return str;
350}
351
352int print_ntable(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
353{
354	FILE *fp = (FILE*)arg;
355	struct ndtmsg *ndtm = NLMSG_DATA(n);
356	int len = n->nlmsg_len;
357	struct rtattr *tb[NDTA_MAX+1];
358	struct rtattr *tpb[NDTPA_MAX+1];
359	int ret;
360
361	if (n->nlmsg_type != RTM_NEWNEIGHTBL) {
362		fprintf(stderr, "Not NEIGHTBL: %08x %08x %08x\n",
363			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
364		return 0;
365	}
366	len -= NLMSG_LENGTH(sizeof(*ndtm));
367	if (len < 0) {
368		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
369		return -1;
370	}
371
372	if (preferred_family && preferred_family != ndtm->ndtm_family)
373		return 0;
374
375	parse_rtattr(tb, NDTA_MAX, NDTA_RTA(ndtm),
376		     n->nlmsg_len - NLMSG_LENGTH(sizeof(*ndtm)));
377
378	if (tb[NDTA_NAME]) {
379		char *name = RTA_DATA(tb[NDTA_NAME]);
380
381		if (strlen(filter.name) > 0 && strcmp(filter.name, name))
382			return 0;
383	}
384	if (tb[NDTA_PARMS]) {
385		parse_rtattr(tpb, NDTPA_MAX, RTA_DATA(tb[NDTA_PARMS]),
386			     RTA_PAYLOAD(tb[NDTA_PARMS]));
387
388		if (tpb[NDTPA_IFINDEX]) {
389			__u32 ifindex = *(__u32 *)RTA_DATA(tpb[NDTPA_IFINDEX]);
390
391			if (filter.index && filter.index != ifindex)
392				return 0;
393		} else {
394			if (filter.index && filter.index != NONE_DEV)
395				return 0;
396		}
397	}
398
399	if (ndtm->ndtm_family == AF_INET)
400		fprintf(fp, "inet ");
401	else if (ndtm->ndtm_family == AF_INET6)
402		fprintf(fp, "inet6 ");
403	else if (ndtm->ndtm_family == AF_DECnet)
404		fprintf(fp, "dnet ");
405	else
406		fprintf(fp, "(%d) ", ndtm->ndtm_family);
407
408	if (tb[NDTA_NAME]) {
409		char *name = RTA_DATA(tb[NDTA_NAME]);
410		fprintf(fp, "%s ", name);
411	}
412
413	fprintf(fp, "%s", _SL_);
414
415	ret = (tb[NDTA_THRESH1] || tb[NDTA_THRESH2] || tb[NDTA_THRESH3] ||
416	       tb[NDTA_GC_INTERVAL]);
417	if (ret)
418		fprintf(fp, "    ");
419
420	if (tb[NDTA_THRESH1]) {
421		__u32 thresh1 = *(__u32 *)RTA_DATA(tb[NDTA_THRESH1]);
422		fprintf(fp, "thresh1 %u ", thresh1);
423	}
424	if (tb[NDTA_THRESH2]) {
425		__u32 thresh2 = *(__u32 *)RTA_DATA(tb[NDTA_THRESH2]);
426		fprintf(fp, "thresh2 %u ", thresh2);
427	}
428	if (tb[NDTA_THRESH3]) {
429		__u32 thresh3 = *(__u32 *)RTA_DATA(tb[NDTA_THRESH3]);
430		fprintf(fp, "thresh3 %u ", thresh3);
431	}
432	if (tb[NDTA_GC_INTERVAL]) {
433		__u64 gc_int = *(__u64 *)RTA_DATA(tb[NDTA_GC_INTERVAL]);
434		fprintf(fp, "gc_int %llu ", gc_int);
435	}
436
437	if (ret)
438		fprintf(fp, "%s", _SL_);
439
440	if (tb[NDTA_CONFIG] && show_stats) {
441		struct ndt_config *ndtc = RTA_DATA(tb[NDTA_CONFIG]);
442
443		fprintf(fp, "    ");
444		fprintf(fp, "config ");
445
446		fprintf(fp, "key_len %u ", ndtc->ndtc_key_len);
447		fprintf(fp, "entry_size %u ", ndtc->ndtc_entry_size);
448		fprintf(fp, "entries %u ", ndtc->ndtc_entries);
449
450		fprintf(fp, "%s", _SL_);
451		fprintf(fp, "        ");
452
453		fprintf(fp, "last_flush %s ",
454			ntable_strtime_delta(ndtc->ndtc_last_flush));
455		fprintf(fp, "last_rand %s ",
456			ntable_strtime_delta(ndtc->ndtc_last_rand));
457
458		fprintf(fp, "%s", _SL_);
459		fprintf(fp, "        ");
460
461		fprintf(fp, "hash_rnd %u ", ndtc->ndtc_hash_rnd);
462		fprintf(fp, "hash_mask %08x ", ndtc->ndtc_hash_mask);
463
464		fprintf(fp, "hash_chain_gc %u ", ndtc->ndtc_hash_chain_gc);
465		fprintf(fp, "proxy_qlen %u ", ndtc->ndtc_proxy_qlen);
466
467		fprintf(fp, "%s", _SL_);
468	}
469
470	if (tb[NDTA_PARMS]) {
471		if (tpb[NDTPA_IFINDEX]) {
472			__u32 ifindex = *(__u32 *)RTA_DATA(tpb[NDTPA_IFINDEX]);
473
474			fprintf(fp, "    ");
475			fprintf(fp, "dev %s ", ll_index_to_name(ifindex));
476			fprintf(fp, "%s", _SL_);
477		}
478
479		fprintf(fp, "    ");
480
481		if (tpb[NDTPA_REFCNT]) {
482			__u32 refcnt = *(__u32 *)RTA_DATA(tpb[NDTPA_REFCNT]);
483			fprintf(fp, "refcnt %u ", refcnt);
484		}
485		if (tpb[NDTPA_REACHABLE_TIME]) {
486			__u64 reachable = *(__u64 *)RTA_DATA(tpb[NDTPA_REACHABLE_TIME]);
487			fprintf(fp, "reachable %llu ", reachable);
488		}
489		if (tpb[NDTPA_BASE_REACHABLE_TIME]) {
490			__u64 breachable = *(__u64 *)RTA_DATA(tpb[NDTPA_BASE_REACHABLE_TIME]);
491			fprintf(fp, "base_reachable %llu ", breachable);
492		}
493		if (tpb[NDTPA_RETRANS_TIME]) {
494			__u64 retrans = *(__u64 *)RTA_DATA(tpb[NDTPA_RETRANS_TIME]);
495			fprintf(fp, "retrans %llu ", retrans);
496		}
497
498		fprintf(fp, "%s", _SL_);
499
500		fprintf(fp, "    ");
501
502		if (tpb[NDTPA_GC_STALETIME]) {
503			__u64 gc_stale = *(__u64 *)RTA_DATA(tpb[NDTPA_GC_STALETIME]);
504			fprintf(fp, "gc_stale %llu ", gc_stale);
505		}
506		if (tpb[NDTPA_DELAY_PROBE_TIME]) {
507			__u64 delay_probe = *(__u64 *)RTA_DATA(tpb[NDTPA_DELAY_PROBE_TIME]);
508			fprintf(fp, "delay_probe %llu ", delay_probe);
509		}
510		if (tpb[NDTPA_QUEUE_LEN]) {
511			__u32 queue = *(__u32 *)RTA_DATA(tpb[NDTPA_QUEUE_LEN]);
512			fprintf(fp, "queue %u ", queue);
513		}
514
515		fprintf(fp, "%s", _SL_);
516
517		fprintf(fp, "    ");
518
519		if (tpb[NDTPA_APP_PROBES]) {
520			__u32 aprobe = *(__u32 *)RTA_DATA(tpb[NDTPA_APP_PROBES]);
521			fprintf(fp, "app_probes %u ", aprobe);
522		}
523		if (tpb[NDTPA_UCAST_PROBES]) {
524			__u32 uprobe = *(__u32 *)RTA_DATA(tpb[NDTPA_UCAST_PROBES]);
525			fprintf(fp, "ucast_probes %u ", uprobe);
526		}
527		if (tpb[NDTPA_MCAST_PROBES]) {
528			__u32 mprobe = *(__u32 *)RTA_DATA(tpb[NDTPA_MCAST_PROBES]);
529			fprintf(fp, "mcast_probes %u ", mprobe);
530		}
531
532		fprintf(fp, "%s", _SL_);
533
534		fprintf(fp, "    ");
535
536		if (tpb[NDTPA_ANYCAST_DELAY]) {
537			__u64 anycast_delay = *(__u64 *)RTA_DATA(tpb[NDTPA_ANYCAST_DELAY]);
538			fprintf(fp, "anycast_delay %llu ", anycast_delay);
539		}
540		if (tpb[NDTPA_PROXY_DELAY]) {
541			__u64 proxy_delay = *(__u64 *)RTA_DATA(tpb[NDTPA_PROXY_DELAY]);
542			fprintf(fp, "proxy_delay %llu ", proxy_delay);
543		}
544		if (tpb[NDTPA_PROXY_QLEN]) {
545			__u32 pqueue = *(__u32 *)RTA_DATA(tpb[NDTPA_PROXY_QLEN]);
546			fprintf(fp, "proxy_queue %u ", pqueue);
547		}
548		if (tpb[NDTPA_LOCKTIME]) {
549			__u64 locktime = *(__u64 *)RTA_DATA(tpb[NDTPA_LOCKTIME]);
550			fprintf(fp, "locktime %llu ", locktime);
551		}
552
553		fprintf(fp, "%s", _SL_);
554	}
555
556	if (tb[NDTA_STATS] && show_stats) {
557		struct ndt_stats *ndts = RTA_DATA(tb[NDTA_STATS]);
558
559		fprintf(fp, "    ");
560		fprintf(fp, "stats ");
561
562		fprintf(fp, "allocs %llu ", ndts->ndts_allocs);
563		fprintf(fp, "destroys %llu ", ndts->ndts_destroys);
564		fprintf(fp, "hash_grows %llu ", ndts->ndts_hash_grows);
565
566		fprintf(fp, "%s", _SL_);
567		fprintf(fp, "        ");
568
569		fprintf(fp, "res_failed %llu ", ndts->ndts_res_failed);
570		fprintf(fp, "lookups %llu ", ndts->ndts_lookups);
571		fprintf(fp, "hits %llu ", ndts->ndts_hits);
572
573		fprintf(fp, "%s", _SL_);
574		fprintf(fp, "        ");
575
576		fprintf(fp, "rcv_probes_mcast %llu ", ndts->ndts_rcv_probes_mcast);
577		fprintf(fp, "rcv_probes_ucast %llu ", ndts->ndts_rcv_probes_ucast);
578
579		fprintf(fp, "%s", _SL_);
580		fprintf(fp, "        ");
581
582		fprintf(fp, "periodic_gc_runs %llu ", ndts->ndts_periodic_gc_runs);
583		fprintf(fp, "forced_gc_runs %llu ", ndts->ndts_forced_gc_runs);
584
585		fprintf(fp, "%s", _SL_);
586	}
587
588	fprintf(fp, "\n");
589
590	fflush(fp);
591	return 0;
592}
593
594void ipntable_reset_filter(void)
595{
596	memset(&filter, 0, sizeof(filter));
597}
598
599static int ipntable_show(int argc, char **argv)
600{
601	ipntable_reset_filter();
602
603	filter.family = preferred_family;
604
605	while (argc > 0) {
606		if (strcmp(*argv, "dev") == 0) {
607			NEXT_ARG();
608
609			if (strcmp("none", *argv) == 0)
610				filter.index = NONE_DEV;
611			else if ((filter.index = ll_name_to_index(*argv)) == 0)
612				invarg("\"DEV\" is invalid", *argv);
613		} else if (strcmp(*argv, "name") == 0) {
614			NEXT_ARG();
615
616			strncpy(filter.name, *argv, sizeof(filter.name));
617		} else
618			invarg("unknown", *argv);
619
620		argc--; argv++;
621	}
622
623	if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETNEIGHTBL) < 0) {
624		perror("Cannot send dump request");
625		exit(1);
626	}
627
628	if (rtnl_dump_filter(&rth, print_ntable, stdout, NULL, NULL) < 0) {
629		fprintf(stderr, "Dump terminated\n");
630		exit(1);
631	}
632
633	return 0;
634}
635
636int do_ipntable(int argc, char **argv)
637{
638	ll_init_map(&rth);
639
640	if (argc > 0) {
641		if (matches(*argv, "change") == 0 ||
642		    matches(*argv, "chg") == 0)
643			return ipntable_modify(RTM_SETNEIGHTBL,
644					       NLM_F_REPLACE,
645					       argc-1, argv+1);
646		if (matches(*argv, "show") == 0 ||
647		    matches(*argv, "lst") == 0 ||
648		    matches(*argv, "list") == 0)
649			return ipntable_show(argc-1, argv+1);
650		if (matches(*argv, "help") == 0)
651			usage();
652	} else
653		return ipntable_show(0, NULL);
654
655	fprintf(stderr, "Command \"%s\" is unknown, try \"ip ntable help\".\n", *argv);
656	exit(-1);
657}
658