[mirror_iproute2.git] / ip / ipntable.c

/*
 * Copyright (C)2006 USAGI/WIDE Project
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses>.
 */
/*
 * based on ipneigh.c
 */
/*
 * Authors:
 *	Masahide NAKAMURA @USAGI
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <time.h>

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

static struct
{
	int family;
        int index;
#define NONE_DEV	(-1)
	char name[1024];
} filter;

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

static void usage(void)
{
	fprintf(stderr,
		"Usage: ip ntable change name NAME [ dev DEV ]\n"
		"          [ thresh1 VAL ] [ thresh2 VAL ] [ thresh3 VAL ] [ gc_int MSEC ]\n"
		"          [ PARMS ]\n"
		"Usage: ip ntable show [ dev DEV ] [ name NAME ]\n"

		"PARMS := [ base_reachable MSEC ] [ retrans MSEC ] [ gc_stale MSEC ]\n"
		"         [ delay_probe MSEC ] [ queue LEN ]\n"
		"         [ app_probs VAL ] [ ucast_probes VAL ] [ mcast_probes VAL ]\n"
		"         [ anycast_delay MSEC ] [ proxy_delay MSEC ] [ proxy_queue LEN ]\n"
		"         [ locktime MSEC ]\n"
		);

	exit(-1);
}

static int ipntable_modify(int cmd, int flags, int argc, char **argv)
{
	struct {
		struct nlmsghdr	n;
		struct ndtmsg		ndtm;
		char  			buf[1024];
	} req;
	char *namep = NULL;
	char *threshsp = NULL;
	char *gc_intp = NULL;
	char parms_buf[1024];
	struct rtattr *parms_rta = (struct rtattr *)parms_buf;
	int parms_change = 0;

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

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg));
	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
	req.n.nlmsg_type = cmd;

	req.ndtm.ndtm_family = preferred_family;
	req.ndtm.ndtm_pad1 = 0;
	req.ndtm.ndtm_pad2 = 0;

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

	parms_rta->rta_type = NDTA_PARMS;
	parms_rta->rta_len = RTA_LENGTH(0);

	while (argc > 0) {
		if (strcmp(*argv, "name") == 0) {
			int len;

			NEXT_ARG();
			if (namep)
				duparg("NAME", *argv);

			namep = *argv;
			len = strlen(namep) + 1;
			addattr_l(&req.n, sizeof(req), NDTA_NAME, namep, len);
		} else if (strcmp(*argv, "thresh1") == 0) {
			__u32 thresh1;

			NEXT_ARG();
			threshsp = *argv;

			if (get_u32(&thresh1, *argv, 0))
				invarg("\"thresh1\" value is invalid", *argv);

			addattr32(&req.n, sizeof(req), NDTA_THRESH1, thresh1);
		} else if (strcmp(*argv, "thresh2") == 0) {
			__u32 thresh2;

			NEXT_ARG();
			threshsp = *argv;

			if (get_u32(&thresh2, *argv, 0))
				invarg("\"thresh2\" value is invalid", *argv);

			addattr32(&req.n, sizeof(req), NDTA_THRESH2, thresh2);
		} else if (strcmp(*argv, "thresh3") == 0) {
			__u32 thresh3;

			NEXT_ARG();
			threshsp = *argv;

			if (get_u32(&thresh3, *argv, 0))
				invarg("\"thresh3\" value is invalid", *argv);

			addattr32(&req.n, sizeof(req), NDTA_THRESH3, thresh3);
		} else if (strcmp(*argv, "gc_int") == 0) {
			__u64 gc_int;

			NEXT_ARG();
			gc_intp = *argv;

			if (get_u64(&gc_int, *argv, 0))
				invarg("\"gc_int\" value is invalid", *argv);

			addattr_l(&req.n, sizeof(req), NDTA_GC_INTERVAL,
				  &gc_int, sizeof(gc_int));
		} else if (strcmp(*argv, "dev") == 0) {
			__u32 ifindex;

			NEXT_ARG();
			ifindex = ll_name_to_index(*argv);
			if (ifindex == 0) {
				fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
				return -1;
			}

			rta_addattr32(parms_rta, sizeof(parms_buf),
				      NDTPA_IFINDEX, ifindex);
		} else if (strcmp(*argv, "base_reachable") == 0) {
			__u64 breachable;

			NEXT_ARG();

			if (get_u64(&breachable, *argv, 0))
				invarg("\"base_reachable\" value is invalid", *argv);

			rta_addattr_l(parms_rta, sizeof(parms_buf),
				      NDTPA_BASE_REACHABLE_TIME,
				      &breachable, sizeof(breachable));
			parms_change = 1;
		} else if (strcmp(*argv, "retrans") == 0) {
			__u64 retrans;

			NEXT_ARG();

			if (get_u64(&retrans, *argv, 0))
				invarg("\"retrans\" value is invalid", *argv);

			rta_addattr_l(parms_rta, sizeof(parms_buf),
				      NDTPA_RETRANS_TIME,
				      &retrans, sizeof(retrans));
			parms_change = 1;
		} else if (strcmp(*argv, "gc_stale") == 0) {
			__u64 gc_stale;

			NEXT_ARG();

			if (get_u64(&gc_stale, *argv, 0))
				invarg("\"gc_stale\" value is invalid", *argv);

			rta_addattr_l(parms_rta, sizeof(parms_buf),
				      NDTPA_GC_STALETIME,
				      &gc_stale, sizeof(gc_stale));
			parms_change = 1;
		} else if (strcmp(*argv, "delay_probe") == 0) {
			__u64 delay_probe;

			NEXT_ARG();

			if (get_u64(&delay_probe, *argv, 0))
				invarg("\"delay_probe\" value is invalid", *argv);

			rta_addattr_l(parms_rta, sizeof(parms_buf),
				      NDTPA_DELAY_PROBE_TIME,
				      &delay_probe, sizeof(delay_probe));
			parms_change = 1;
		} else if (strcmp(*argv, "queue") == 0) {
			__u32 queue;

			NEXT_ARG();

			if (get_u32(&queue, *argv, 0))
				invarg("\"queue\" value is invalid", *argv);

			if (!parms_rta)
				parms_rta = (struct rtattr *)&parms_buf;
			rta_addattr32(parms_rta, sizeof(parms_buf),
				      NDTPA_QUEUE_LEN, queue);
			parms_change = 1;
		} else if (strcmp(*argv, "app_probes") == 0) {
			__u32 aprobe;

			NEXT_ARG();

			if (get_u32(&aprobe, *argv, 0))
				invarg("\"app_probes\" value is invalid", *argv);

			rta_addattr32(parms_rta, sizeof(parms_buf),
				      NDTPA_APP_PROBES, aprobe);
			parms_change = 1;
		} else if (strcmp(*argv, "ucast_probes") == 0) {
			__u32 uprobe;

			NEXT_ARG();

			if (get_u32(&uprobe, *argv, 0))
				invarg("\"ucast_probes\" value is invalid", *argv);

			rta_addattr32(parms_rta, sizeof(parms_buf),
				      NDTPA_UCAST_PROBES, uprobe);
			parms_change = 1;
		} else if (strcmp(*argv, "mcast_probes") == 0) {
			__u32 mprobe;

			NEXT_ARG();

			if (get_u32(&mprobe, *argv, 0))
				invarg("\"mcast_probes\" value is invalid", *argv);

			rta_addattr32(parms_rta, sizeof(parms_buf),
				      NDTPA_MCAST_PROBES, mprobe);
			parms_change = 1;
		} else if (strcmp(*argv, "anycast_delay") == 0) {
			__u64 anycast_delay;

			NEXT_ARG();

			if (get_u64(&anycast_delay, *argv, 0))
				invarg("\"anycast_delay\" value is invalid", *argv);

			rta_addattr_l(parms_rta, sizeof(parms_buf),
				      NDTPA_ANYCAST_DELAY,
				      &anycast_delay, sizeof(anycast_delay));
			parms_change = 1;
		} else if (strcmp(*argv, "proxy_delay") == 0) {
			__u64 proxy_delay;

			NEXT_ARG();

			if (get_u64(&proxy_delay, *argv, 0))
				invarg("\"proxy_delay\" value is invalid", *argv);

			rta_addattr_l(parms_rta, sizeof(parms_buf),
				      NDTPA_PROXY_DELAY,
				      &proxy_delay, sizeof(proxy_delay));
			parms_change = 1;
		} else if (strcmp(*argv, "proxy_queue") == 0) {
			__u32 pqueue;

			NEXT_ARG();

			if (get_u32(&pqueue, *argv, 0))
				invarg("\"proxy_queue\" value is invalid", *argv);

			rta_addattr32(parms_rta, sizeof(parms_buf),
				      NDTPA_PROXY_QLEN, pqueue);
			parms_change = 1;
		} else if (strcmp(*argv, "locktime") == 0) {
			__u64 locktime;

			NEXT_ARG();

			if (get_u64(&locktime, *argv, 0))
				invarg("\"locktime\" value is invalid", *argv);

			rta_addattr_l(parms_rta, sizeof(parms_buf),
				      NDTPA_LOCKTIME,
				      &locktime, sizeof(locktime));
			parms_change = 1;
		} else {
			invarg("unknown", *argv);
		}

		argc--; argv++;
	}

	if (!namep)
		missarg("NAME");
	if (!threshsp && !gc_intp && !parms_change) {
		fprintf(stderr, "Not enough information: changeable attributes required.\n");
		exit(-1);
	}

	if (parms_rta->rta_len > RTA_LENGTH(0)) {
		addattr_l(&req.n, sizeof(req), NDTA_PARMS, RTA_DATA(parms_rta),
			  RTA_PAYLOAD(parms_rta));
	}

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

	return 0;
}

static const char *ntable_strtime_delta(__u32 msec)
{
	static char str[32];
	struct timeval now;
	time_t t;
	struct tm *tp;

	if (msec == 0)
		goto error;

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

	if (gettimeofday(&now, NULL) < 0) {
		perror("gettimeofday");
		goto error;
	}

	t = now.tv_sec - (msec / 1000);
	tp = localtime(&t);
	if (!tp)
		goto error;

	strftime(str, sizeof(str), "%Y-%m-%d %T", tp);

	return str;
 error:
	strcpy(str, "(error)");
	return str;
}

int print_ntable(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE*)arg;
	struct ndtmsg *ndtm = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr *tb[NDTA_MAX+1];
	struct rtattr *tpb[NDTPA_MAX+1];
	int ret;

	if (n->nlmsg_type != RTM_NEWNEIGHTBL) {
		fprintf(stderr, "Not NEIGHTBL: %08x %08x %08x\n",
			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
		return 0;
	}
	len -= NLMSG_LENGTH(sizeof(*ndtm));
	if (len < 0) {
		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
		return -1;
	}

	if (preferred_family && preferred_family != ndtm->ndtm_family)
		return 0;

	parse_rtattr(tb, NDTA_MAX, NDTA_RTA(ndtm),
		     n->nlmsg_len - NLMSG_LENGTH(sizeof(*ndtm)));

	if (tb[NDTA_NAME]) {
		const char *name = rta_getattr_str(tb[NDTA_NAME]);

		if (strlen(filter.name) > 0 && strcmp(filter.name, name))
			return 0;
	}
	if (tb[NDTA_PARMS]) {
		parse_rtattr(tpb, NDTPA_MAX, RTA_DATA(tb[NDTA_PARMS]),
			     RTA_PAYLOAD(tb[NDTA_PARMS]));

		if (tpb[NDTPA_IFINDEX]) {
			__u32 ifindex = rta_getattr_u32(tpb[NDTPA_IFINDEX]);

			if (filter.index && filter.index != ifindex)
				return 0;
		} else {
			if (filter.index && filter.index != NONE_DEV)
				return 0;
		}
	}

	if (ndtm->ndtm_family == AF_INET)
		fprintf(fp, "inet ");
	else if (ndtm->ndtm_family == AF_INET6)
		fprintf(fp, "inet6 ");
	else if (ndtm->ndtm_family == AF_DECnet)
		fprintf(fp, "dnet ");
	else
		fprintf(fp, "(%d) ", ndtm->ndtm_family);

	if (tb[NDTA_NAME]) {
		const char *name = rta_getattr_str(tb[NDTA_NAME]);
		fprintf(fp, "%s ", name);
	}

	fprintf(fp, "%s", _SL_);

	ret = (tb[NDTA_THRESH1] || tb[NDTA_THRESH2] || tb[NDTA_THRESH3] ||
	       tb[NDTA_GC_INTERVAL]);
	if (ret)
		fprintf(fp, "    ");

	if (tb[NDTA_THRESH1]) {
		__u32 thresh1 = rta_getattr_u32(tb[NDTA_THRESH1]);
		fprintf(fp, "thresh1 %u ", thresh1);
	}
	if (tb[NDTA_THRESH2]) {
		__u32 thresh2 = rta_getattr_u32(tb[NDTA_THRESH2]);
		fprintf(fp, "thresh2 %u ", thresh2);
	}
	if (tb[NDTA_THRESH3]) {
		__u32 thresh3 = rta_getattr_u32(tb[NDTA_THRESH3]);
		fprintf(fp, "thresh3 %u ", thresh3);
	}
	if (tb[NDTA_GC_INTERVAL]) {
		unsigned long long gc_int = rta_getattr_u64(tb[NDTA_GC_INTERVAL]);
		fprintf(fp, "gc_int %llu ", gc_int);
	}

	if (ret)
		fprintf(fp, "%s", _SL_);

	if (tb[NDTA_CONFIG] && show_stats) {
		struct ndt_config *ndtc = RTA_DATA(tb[NDTA_CONFIG]);

		fprintf(fp, "    ");
		fprintf(fp, "config ");

		fprintf(fp, "key_len %u ", ndtc->ndtc_key_len);
		fprintf(fp, "entry_size %u ", ndtc->ndtc_entry_size);
		fprintf(fp, "entries %u ", ndtc->ndtc_entries);

		fprintf(fp, "%s", _SL_);
		fprintf(fp, "        ");

		fprintf(fp, "last_flush %s ",
			ntable_strtime_delta(ndtc->ndtc_last_flush));
		fprintf(fp, "last_rand %s ",
			ntable_strtime_delta(ndtc->ndtc_last_rand));

		fprintf(fp, "%s", _SL_);
		fprintf(fp, "        ");

		fprintf(fp, "hash_rnd %u ", ndtc->ndtc_hash_rnd);
		fprintf(fp, "hash_mask %08x ", ndtc->ndtc_hash_mask);

		fprintf(fp, "hash_chain_gc %u ", ndtc->ndtc_hash_chain_gc);
		fprintf(fp, "proxy_qlen %u ", ndtc->ndtc_proxy_qlen);

		fprintf(fp, "%s", _SL_);
	}

	if (tb[NDTA_PARMS]) {
		if (tpb[NDTPA_IFINDEX]) {
			__u32 ifindex = rta_getattr_u32(tpb[NDTPA_IFINDEX]);

			fprintf(fp, "    ");
			fprintf(fp, "dev %s ", ll_index_to_name(ifindex));
			fprintf(fp, "%s", _SL_);
		}

		fprintf(fp, "    ");

		if (tpb[NDTPA_REFCNT]) {
			__u32 refcnt = rta_getattr_u32(tpb[NDTPA_REFCNT]);
			fprintf(fp, "refcnt %u ", refcnt);
		}
		if (tpb[NDTPA_REACHABLE_TIME]) {
			unsigned long long reachable = rta_getattr_u64(tpb[NDTPA_REACHABLE_TIME]);
			fprintf(fp, "reachable %llu ", reachable);
		}
		if (tpb[NDTPA_BASE_REACHABLE_TIME]) {
			unsigned long long breachable = rta_getattr_u64(tpb[NDTPA_BASE_REACHABLE_TIME]);
			fprintf(fp, "base_reachable %llu ", breachable);
		}
		if (tpb[NDTPA_RETRANS_TIME]) {
			unsigned long long retrans = rta_getattr_u64(tpb[NDTPA_RETRANS_TIME]);
			fprintf(fp, "retrans %llu ", retrans);
		}

		fprintf(fp, "%s", _SL_);

		fprintf(fp, "    ");

		if (tpb[NDTPA_GC_STALETIME]) {
			unsigned long long gc_stale = rta_getattr_u64(tpb[NDTPA_GC_STALETIME]);
			fprintf(fp, "gc_stale %llu ", gc_stale);
		}
		if (tpb[NDTPA_DELAY_PROBE_TIME]) {
			unsigned long long delay_probe = rta_getattr_u64(tpb[NDTPA_DELAY_PROBE_TIME]);
			fprintf(fp, "delay_probe %llu ", delay_probe);
		}
		if (tpb[NDTPA_QUEUE_LEN]) {
			__u32 queue = rta_getattr_u32(tpb[NDTPA_QUEUE_LEN]);
			fprintf(fp, "queue %u ", queue);
		}

		fprintf(fp, "%s", _SL_);

		fprintf(fp, "    ");

		if (tpb[NDTPA_APP_PROBES]) {
			__u32 aprobe = rta_getattr_u32(tpb[NDTPA_APP_PROBES]);
			fprintf(fp, "app_probes %u ", aprobe);
		}
		if (tpb[NDTPA_UCAST_PROBES]) {
			__u32 uprobe = rta_getattr_u32(tpb[NDTPA_UCAST_PROBES]);
			fprintf(fp, "ucast_probes %u ", uprobe);
		}
		if (tpb[NDTPA_MCAST_PROBES]) {
			__u32 mprobe = rta_getattr_u32(tpb[NDTPA_MCAST_PROBES]);
			fprintf(fp, "mcast_probes %u ", mprobe);
		}

		fprintf(fp, "%s", _SL_);

		fprintf(fp, "    ");

		if (tpb[NDTPA_ANYCAST_DELAY]) {
			unsigned long long anycast_delay = rta_getattr_u64(tpb[NDTPA_ANYCAST_DELAY]);
			fprintf(fp, "anycast_delay %llu ", anycast_delay);
		}
		if (tpb[NDTPA_PROXY_DELAY]) {
			unsigned long long proxy_delay = rta_getattr_u64(tpb[NDTPA_PROXY_DELAY]);
			fprintf(fp, "proxy_delay %llu ", proxy_delay);
		}
		if (tpb[NDTPA_PROXY_QLEN]) {
			__u32 pqueue = rta_getattr_u32(tpb[NDTPA_PROXY_QLEN]);
			fprintf(fp, "proxy_queue %u ", pqueue);
		}
		if (tpb[NDTPA_LOCKTIME]) {
			unsigned long long locktime = rta_getattr_u64(tpb[NDTPA_LOCKTIME]);
			fprintf(fp, "locktime %llu ", locktime);
		}

		fprintf(fp, "%s", _SL_);
	}

	if (tb[NDTA_STATS] && show_stats) {
		struct ndt_stats *ndts = RTA_DATA(tb[NDTA_STATS]);

		fprintf(fp, "    ");
		fprintf(fp, "stats ");

		fprintf(fp, "allocs %llu ",
			(unsigned long long) ndts->ndts_allocs);
		fprintf(fp, "destroys %llu ",
			(unsigned long long) ndts->ndts_destroys);
		fprintf(fp, "hash_grows %llu ",
			(unsigned long long) ndts->ndts_hash_grows);

		fprintf(fp, "%s", _SL_);
		fprintf(fp, "        ");

		fprintf(fp, "res_failed %llu ",
			(unsigned long long) ndts->ndts_res_failed);
		fprintf(fp, "lookups %llu ",
			(unsigned long long) ndts->ndts_lookups);
		fprintf(fp, "hits %llu ",
			(unsigned long long) ndts->ndts_hits);

		fprintf(fp, "%s", _SL_);
		fprintf(fp, "        ");

		fprintf(fp, "rcv_probes_mcast %llu ",
			(unsigned long long) ndts->ndts_rcv_probes_mcast);
		fprintf(fp, "rcv_probes_ucast %llu ",
			(unsigned long long) ndts->ndts_rcv_probes_ucast);

		fprintf(fp, "%s", _SL_);
		fprintf(fp, "        ");

		fprintf(fp, "periodic_gc_runs %llu ",
			(unsigned long long) ndts->ndts_periodic_gc_runs);
		fprintf(fp, "forced_gc_runs %llu ",
			(unsigned long long) ndts->ndts_forced_gc_runs);

		fprintf(fp, "%s", _SL_);
	}

	fprintf(fp, "\n");

	fflush(fp);
	return 0;
}

void ipntable_reset_filter(void)
{
	memset(&filter, 0, sizeof(filter));
}

static int ipntable_show(int argc, char **argv)
{
	ipntable_reset_filter();

	filter.family = preferred_family;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();

			if (strcmp("none", *argv) == 0)
				filter.index = NONE_DEV;
			else if ((filter.index = ll_name_to_index(*argv)) == 0)
				invarg("\"DEV\" is invalid", *argv);
		} else if (strcmp(*argv, "name") == 0) {
			NEXT_ARG();

			strncpy(filter.name, *argv, sizeof(filter.name));
		} else
			invarg("unknown", *argv);

		argc--; argv++;
	}

	if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETNEIGHTBL) < 0) {
		perror("Cannot send dump request");
		exit(1);
	}

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

	return 0;
}

int do_ipntable(int argc, char **argv)
{
	ll_init_map(&rth);

	if (argc > 0) {
		if (matches(*argv, "change") == 0 ||
		    matches(*argv, "chg") == 0)
			return ipntable_modify(RTM_SETNEIGHTBL,
					       NLM_F_REPLACE,
					       argc-1, argv+1);
		if (matches(*argv, "show") == 0 ||
		    matches(*argv, "lst") == 0 ||
		    matches(*argv, "list") == 0)
			return ipntable_show(argc-1, argv+1);
		if (matches(*argv, "help") == 0)
			usage();
	} else
		return ipntable_show(0, NULL);

	fprintf(stderr, "Command \"%s\" is unknown, try \"ip ntable help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
143969f2 SH	1	/*
143969f2 SH	2	* Copyright (C)2006 USAGI/WIDE Project
ae665a52	3	*
143969f2 SH	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.
ae665a52	8	*
143969f2 SH	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.
ae665a52	13	*
143969f2	14	* You should have received a copy of the GNU General Public License
4d98ab00	15	* along with this program; if not, see <http://www.gnu.org/licenses>.
143969f2 SH	16	*/
	17	/*
	18	* based on ipneigh.c
	19	*/
	20	/*
	21	* Authors:
	22	* Masahide NAKAMURA @USAGI
	23	*/
	24
	25	#include <stdio.h>
	26	#include <stdlib.h>
	27	#include <string.h>
	28	#include <sys/time.h>
5bd9dd49	29	#include <sys/socket.h>
143969f2 SH	30	#include <time.h>
	31
	32	#include "utils.h"
	33	#include "ip_common.h"
	34
	35	static struct
	36	{
	37	int family;
	38	int index;
	39	#define NONE_DEV (-1)
	40	char name[1024];
	41	} filter;
	42
	43	static void usage(void) __attribute__((noreturn));
	44
	45	static 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
	63	static int ipntable_modify(int cmd, int flags, int argc, char **argv)
	64	{
	65	struct {
4806867a	66	struct nlmsghdr n;
143969f2	67	struct ndtmsg ndtm;
4806867a	68	char buf[1024];
143969f2 SH	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) {
d259f030	307	fprintf(stderr, "Not enough information: changeable attributes required.\n");
143969f2 SH	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
c079e121	316	if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
143969f2 SH	317	exit(2);
	318
	319	return 0;
	320	}
	321
	322	static 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
	352	int 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]) {
ff24746c	379	const char *name = rta_getattr_str(tb[NDTA_NAME]);
143969f2 SH	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]) {
ff24746c	389	__u32 ifindex = rta_getattr_u32(tpb[NDTPA_IFINDEX]);
143969f2 SH	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]) {
ff24746c	409	const char *name = rta_getattr_str(tb[NDTA_NAME]);
143969f2 SH	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]) {
ff24746c	421	__u32 thresh1 = rta_getattr_u32(tb[NDTA_THRESH1]);
143969f2 SH	422	fprintf(fp, "thresh1 %u ", thresh1);
	423	}
	424	if (tb[NDTA_THRESH2]) {
ff24746c	425	__u32 thresh2 = rta_getattr_u32(tb[NDTA_THRESH2]);
143969f2 SH	426	fprintf(fp, "thresh2 %u ", thresh2);
	427	}
	428	if (tb[NDTA_THRESH3]) {
ff24746c	429	__u32 thresh3 = rta_getattr_u32(tb[NDTA_THRESH3]);
143969f2 SH	430	fprintf(fp, "thresh3 %u ", thresh3);
	431	}
	432	if (tb[NDTA_GC_INTERVAL]) {
a55a8fd8 SH	433	unsigned long long gc_int = rta_getattr_u64(tb[NDTA_GC_INTERVAL]);
a55a8fd8 SH	434	fprintf(fp, "gc_int %llu ", gc_int);
143969f2 SH	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]) {
ff24746c	472	__u32 ifindex = rta_getattr_u32(tpb[NDTPA_IFINDEX]);
143969f2 SH	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]) {
ff24746c	482	__u32 refcnt = rta_getattr_u32(tpb[NDTPA_REFCNT]);
143969f2 SH	483	fprintf(fp, "refcnt %u ", refcnt);
	484	}
	485	if (tpb[NDTPA_REACHABLE_TIME]) {
a55a8fd8 SH	486	unsigned long long reachable = rta_getattr_u64(tpb[NDTPA_REACHABLE_TIME]);
a55a8fd8 SH	487	fprintf(fp, "reachable %llu ", reachable);
143969f2 SH	488	}
143969f2 SH	489	if (tpb[NDTPA_BASE_REACHABLE_TIME]) {
a55a8fd8 SH	490	unsigned long long breachable = rta_getattr_u64(tpb[NDTPA_BASE_REACHABLE_TIME]);
a55a8fd8 SH	491	fprintf(fp, "base_reachable %llu ", breachable);
143969f2 SH	492	}
143969f2 SH	493	if (tpb[NDTPA_RETRANS_TIME]) {
a55a8fd8 SH	494	unsigned long long retrans = rta_getattr_u64(tpb[NDTPA_RETRANS_TIME]);
a55a8fd8 SH	495	fprintf(fp, "retrans %llu ", retrans);
143969f2 SH	496	}
	497
	498	fprintf(fp, "%s", _SL_);
	499
	500	fprintf(fp, " ");
	501
	502	if (tpb[NDTPA_GC_STALETIME]) {
a55a8fd8 SH	503	unsigned long long gc_stale = rta_getattr_u64(tpb[NDTPA_GC_STALETIME]);
a55a8fd8 SH	504	fprintf(fp, "gc_stale %llu ", gc_stale);
143969f2 SH	505	}
143969f2 SH	506	if (tpb[NDTPA_DELAY_PROBE_TIME]) {
a55a8fd8 SH	507	unsigned long long delay_probe = rta_getattr_u64(tpb[NDTPA_DELAY_PROBE_TIME]);
a55a8fd8 SH	508	fprintf(fp, "delay_probe %llu ", delay_probe);
143969f2 SH	509	}
143969f2 SH	510	if (tpb[NDTPA_QUEUE_LEN]) {
ff24746c	511	__u32 queue = rta_getattr_u32(tpb[NDTPA_QUEUE_LEN]);
143969f2 SH	512	fprintf(fp, "queue %u ", queue);
	513	}
	514
	515	fprintf(fp, "%s", _SL_);
	516
	517	fprintf(fp, " ");
	518
	519	if (tpb[NDTPA_APP_PROBES]) {
ff24746c	520	__u32 aprobe = rta_getattr_u32(tpb[NDTPA_APP_PROBES]);
143969f2 SH	521	fprintf(fp, "app_probes %u ", aprobe);
	522	}
	523	if (tpb[NDTPA_UCAST_PROBES]) {
ff24746c	524	__u32 uprobe = rta_getattr_u32(tpb[NDTPA_UCAST_PROBES]);
143969f2 SH	525	fprintf(fp, "ucast_probes %u ", uprobe);
	526	}
	527	if (tpb[NDTPA_MCAST_PROBES]) {
ff24746c	528	__u32 mprobe = rta_getattr_u32(tpb[NDTPA_MCAST_PROBES]);
143969f2 SH	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]) {
a55a8fd8 SH	537	unsigned long long anycast_delay = rta_getattr_u64(tpb[NDTPA_ANYCAST_DELAY]);
a55a8fd8 SH	538	fprintf(fp, "anycast_delay %llu ", anycast_delay);
143969f2 SH	539	}
143969f2 SH	540	if (tpb[NDTPA_PROXY_DELAY]) {
a55a8fd8 SH	541	unsigned long long proxy_delay = rta_getattr_u64(tpb[NDTPA_PROXY_DELAY]);
a55a8fd8 SH	542	fprintf(fp, "proxy_delay %llu ", proxy_delay);
143969f2 SH	543	}
143969f2 SH	544	if (tpb[NDTPA_PROXY_QLEN]) {
ff24746c	545	__u32 pqueue = rta_getattr_u32(tpb[NDTPA_PROXY_QLEN]);
143969f2 SH	546	fprintf(fp, "proxy_queue %u ", pqueue);
	547	}
	548	if (tpb[NDTPA_LOCKTIME]) {
a55a8fd8 SH	549	unsigned long long locktime = rta_getattr_u64(tpb[NDTPA_LOCKTIME]);
a55a8fd8 SH	550	fprintf(fp, "locktime %llu ", locktime);
143969f2 SH	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
ae70d966 SH	562	fprintf(fp, "allocs %llu ",
	563	(unsigned long long) ndts->ndts_allocs);
	564	fprintf(fp, "destroys %llu ",
	565	(unsigned long long) ndts->ndts_destroys);
	566	fprintf(fp, "hash_grows %llu ",
	567	(unsigned long long) ndts->ndts_hash_grows);
143969f2 SH	568
	569	fprintf(fp, "%s", _SL_);
	570	fprintf(fp, " ");
	571
ae70d966 SH	572	fprintf(fp, "res_failed %llu ",
	573	(unsigned long long) ndts->ndts_res_failed);
	574	fprintf(fp, "lookups %llu ",
	575	(unsigned long long) ndts->ndts_lookups);
	576	fprintf(fp, "hits %llu ",
	577	(unsigned long long) ndts->ndts_hits);
143969f2 SH	578
	579	fprintf(fp, "%s", _SL_);
	580	fprintf(fp, " ");
	581
ae70d966 SH	582	fprintf(fp, "rcv_probes_mcast %llu ",
	583	(unsigned long long) ndts->ndts_rcv_probes_mcast);
	584	fprintf(fp, "rcv_probes_ucast %llu ",
	585	(unsigned long long) ndts->ndts_rcv_probes_ucast);
143969f2 SH	586
	587	fprintf(fp, "%s", _SL_);
	588	fprintf(fp, " ");
	589
ae70d966 SH	590	fprintf(fp, "periodic_gc_runs %llu ",
	591	(unsigned long long) ndts->ndts_periodic_gc_runs);
	592	fprintf(fp, "forced_gc_runs %llu ",
	593	(unsigned long long) ndts->ndts_forced_gc_runs);
143969f2 SH	594
	595	fprintf(fp, "%s", _SL_);
	596	}
	597
	598	fprintf(fp, "\n");
	599
	600	fflush(fp);
	601	return 0;
	602	}
	603
	604	void ipntable_reset_filter(void)
	605	{
	606	memset(&filter, 0, sizeof(filter));
	607	}
	608
	609	static int ipntable_show(int argc, char **argv)
	610	{
	611	ipntable_reset_filter();
	612
	613	filter.family = preferred_family;
	614
	615	while (argc > 0) {
	616	if (strcmp(*argv, "dev") == 0) {
	617	NEXT_ARG();
	618
	619	if (strcmp("none", *argv) == 0)
	620	filter.index = NONE_DEV;
	621	else if ((filter.index = ll_name_to_index(*argv)) == 0)
	622	invarg("\"DEV\" is invalid", *argv);
	623	} else if (strcmp(*argv, "name") == 0) {
	624	NEXT_ARG();
	625
	626	strncpy(filter.name, *argv, sizeof(filter.name));
	627	} else
	628	invarg("unknown", *argv);
	629
	630	argc--; argv++;
	631	}
	632
	633	if (rtnl_wilddump_request(&rth, preferred_family, RTM_GETNEIGHTBL) < 0) {
	634	perror("Cannot send dump request");
	635	exit(1);
	636	}
	637
cd70f3f5	638	if (rtnl_dump_filter(&rth, print_ntable, stdout) < 0) {
143969f2 SH	639	fprintf(stderr, "Dump terminated\n");
	640	exit(1);
	641	}
	642
	643	return 0;
	644	}
	645
	646	int do_ipntable(int argc, char **argv)
	647	{
	648	ll_init_map(&rth);
	649
	650	if (argc > 0) {
	651	if (matches(*argv, "change") == 0 \|\|
	652	matches(*argv, "chg") == 0)
	653	return ipntable_modify(RTM_SETNEIGHTBL,
	654	NLM_F_REPLACE,
	655	argc-1, argv+1);
	656	if (matches(*argv, "show") == 0 \|\|
	657	matches(*argv, "lst") == 0 \|\|
	658	matches(*argv, "list") == 0)
	659	return ipntable_show(argc-1, argv+1);
	660	if (matches(*argv, "help") == 0)
	661	usage();
	662	} else
	663	return ipntable_show(0, NULL);
	664
	665	fprintf(stderr, "Command \"%s\" is unknown, try \"ip ntable help\".\n", *argv);
	666	exit(-1);
	667	}