[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 <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"
#include "json_print.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");
	fprintf(stderr, "                                 [ vrf NAME ]\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 = {
		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
		.n.nlmsg_flags = NLM_F_REQUEST | flags,
		.n.nlmsg_type = cmd,
		.ndm.ndm_family = preferred_family,
		.ndm.ndm_state = NUD_PERMANENT,
	};
	char  *dev = NULL;
	int dst_ok = 0;
	int dev_ok = 0;
	int lladdr_ok = 0;
	char *lla = NULL;
	inet_prefix dst;

	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, "router") == 0) {
			req.ndm.ndm_flags |= NTF_ROUTER;
		} 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);
		if (!req.ndm.ndm_ifindex)
			return nodev(dev);
	}

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

	return 0;
}

static void print_cacheinfo(const struct nda_cacheinfo *ci)
{
	static int hz;

	if (!hz)
		hz = get_user_hz();

	if (ci->ndm_refcnt)
		print_uint(PRINT_ANY, "refcnt",
				" ref %u", ci->ndm_refcnt);

	print_uint(PRINT_ANY, "used", " used %u", ci->ndm_used / hz);
	print_uint(PRINT_ANY, "confirmed", "/%u", ci->ndm_confirmed / hz);
	print_uint(PRINT_ANY, "updated", "/%u", ci->ndm_updated / hz);
}

static void print_neigh_state(unsigned int nud)
{

	open_json_array(PRINT_JSON,
			is_json_context() ?  "state" : "");

#define PRINT_FLAG(f)						\
	if (nud & NUD_##f) {					\
		nud &= ~NUD_##f;				\
		print_string(PRINT_ANY, NULL, " %s", #f);	\
	}

	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

	close_json_array(PRINT_JSON, NULL);
}

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];
	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_flags & NTF_EXT_LEARNED) &&
	    (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 (inet_addr_match_rta(&filter.pfx, tb[NDA_DST]))
		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;
	}

	open_json_object(NULL);
	if (n->nlmsg_type == RTM_DELNEIGH)
		print_bool(PRINT_ANY, "deleted", "Deleted ", true);
	else if (n->nlmsg_type == RTM_GETNEIGH)
		print_null(PRINT_ANY, "miss", "%s ", "miss");

	if (tb[NDA_DST]) {
		const char *dst;

		dst = format_host_rta(r->ndm_family, tb[NDA_DST]);
		print_color_string(PRINT_ANY,
				   ifa_family_color(r->ndm_family),
				   "dst", "%s ", dst);
	}

	if (!filter.index && r->ndm_ifindex) {
		if (!is_json_context())
			fprintf(fp, "dev ");

		print_color_string(PRINT_ANY, COLOR_IFNAME,
				   "dev", "%s ",
				   ll_index_to_name(r->ndm_ifindex));
	}

	if (tb[NDA_LLADDR]) {
		const char *lladdr;
		SPRINT_BUF(b1);

		lladdr = ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
				     RTA_PAYLOAD(tb[NDA_LLADDR]),
				     ll_index_to_type(r->ndm_ifindex),
				     b1, sizeof(b1));

		if (!is_json_context())
			fprintf(fp, "lladdr ");

		print_color_string(PRINT_ANY, COLOR_MAC,
				   "lladdr", "%s", lladdr);
	}

	if (r->ndm_flags & NTF_ROUTER)
		print_null(PRINT_ANY, "router", " %s", "router");

	if (r->ndm_flags & NTF_PROXY)
		print_null(PRINT_ANY, "proxy", " %s", "proxy");

	if (show_stats) {
		if (tb[NDA_CACHEINFO])
			print_cacheinfo(RTA_DATA(tb[NDA_CACHEINFO]));

		if (tb[NDA_PROBES])
			print_uint(PRINT_ANY, "probes", " probes %u",
				   rta_getattr_u32(tb[NDA_PROBES]));
	}

	if (r->ndm_state)
		print_neigh_state(r->ndm_state);

	print_string(PRINT_FP, NULL, "\n", "");
	close_json_object();
	fflush(stdout);

	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 = {
		.n.nlmsg_type = RTM_GETNEIGH,
		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
	};
	char *filter_dev = NULL;
	int state_given = 0;

	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, "vrf") == 0) {
			int ifindex;

			NEXT_ARG();
			ifindex = ll_name_to_index(*argv);
			if (!ifindex)
				invarg("Not a valid VRF name\n", *argv);
			if (!name_is_vrf(*argv))
				invarg("Not a valid VRF name\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();
			if (get_prefix(&filter.pfx, *argv, filter.family))
				invarg("to value is invalid\n", *argv);
			if (filter.family == AF_UNSPEC)
				filter.family = filter.pfx.family;
		}
		argc--; argv++;
	}

	ll_init_map(&rth);

	if (filter_dev) {
		filter.index = ll_name_to_index(filter_dev);
		if (!filter.index)
			return nodev(filter_dev);
		addattr32(&req.n, sizeof(req), NDA_IFINDEX, filter.index);
	}

	req.ndm.ndm_family = filter.family;

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

		filter.flushb = flushb;
		filter.flushp = 0;
		filter.flushe = sizeof(flushb);

		while (round < MAX_ROUNDS) {
			if (rtnl_dump_request_n(&rth, &req.n) < 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);
			}
			filter.state &= ~NUD_FAILED;
		}
		printf("*** Flush not complete bailing out after %d rounds\n",
			MAX_ROUNDS);
		return 1;
	}

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

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

	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>
aba5acdf SH	16	#include <fcntl.h>
	17	#include <string.h>
	18	#include <sys/time.h>
aba5acdf SH	19	#include <sys/socket.h>
	20	#include <netinet/in.h>
	21	#include <netinet/ip.h>
	22
	23	#include "rt_names.h"
	24	#include "utils.h"
	25	#include "ip_common.h"
aac7f725	26	#include "json_print.h"
aba5acdf SH	27
aba5acdf SH	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"
03a0cf20 PS	50	" { ADDR [ lladdr LLADDR ] [ nud STATE ] \| proxy ADDR } [ dev DEV ]\n");
5db1adae DA	51	fprintf(stderr, " ip neigh { show \| flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n");
5db1adae DA	52	fprintf(stderr, " [ vrf NAME ]\n\n");
03a0cf20	53	fprintf(stderr, "STATE := { permanent \| noarp \| stale \| reachable \| none \|\n"
56f5daac	54	" incomplete \| delay \| probe \| failed }\n");
aba5acdf SH	55	exit(-1);
	56	}
	57
56f5daac	58	static int nud_state_a2n(unsigned int state, const char arg)
aba5acdf SH	59	{
	60	if (matches(arg, "permanent") == 0)
	61	*state = NUD_PERMANENT;
	62	else if (matches(arg, "reachable") == 0)
	63	*state = NUD_REACHABLE;
	64	else if (strcmp(arg, "noarp") == 0)
	65	*state = NUD_NOARP;
	66	else if (strcmp(arg, "none") == 0)
	67	*state = NUD_NONE;
	68	else if (strcmp(arg, "stale") == 0)
	69	*state = NUD_STALE;
	70	else if (strcmp(arg, "incomplete") == 0)
	71	*state = NUD_INCOMPLETE;
	72	else if (strcmp(arg, "delay") == 0)
	73	*state = NUD_DELAY;
	74	else if (strcmp(arg, "probe") == 0)
	75	*state = NUD_PROBE;
	76	else if (matches(arg, "failed") == 0)
	77	*state = NUD_FAILED;
	78	else {
	79	if (get_unsigned(state, arg, 0))
	80	return -1;
56f5daac	81	if (state >= 0x100 \|\| (state&((*state)-1)))
aba5acdf SH	82	return -1;
	83	}
	84	return 0;
	85	}
	86
aba5acdf SH	87	static int flush_update(void)
aba5acdf SH	88	{
f31a37f7	89	if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
1fb0a998	90	perror("Failed to send flush request");
aba5acdf SH	91	return -1;
	92	}
	93	filter.flushp = 0;
	94	return 0;
	95	}
	96
	97
	98	static int ipneigh_modify(int cmd, int flags, int argc, char **argv)
	99	{
aba5acdf	100	struct {
4806867a SH	101	struct nlmsghdr n;
4806867a SH	102	struct ndmsg ndm;
56f5daac	103	char buf[256];
d17b136f PS	104	} req = {
	105	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
	106	.n.nlmsg_flags = NLM_F_REQUEST \| flags,
	107	.n.nlmsg_type = cmd,
	108	.ndm.ndm_family = preferred_family,
	109	.ndm.ndm_state = NUD_PERMANENT,
	110	};
e834eb8e	111	char *dev = NULL;
aba5acdf	112	int dst_ok = 0;
e834eb8e	113	int dev_ok = 0;
aba5acdf	114	int lladdr_ok = 0;
56f5daac	115	char *lla = NULL;
aba5acdf SH	116	inet_prefix dst;
aba5acdf SH	117
aba5acdf SH	118	while (argc > 0) {
	119	if (matches(*argv, "lladdr") == 0) {
	120	NEXT_ARG();
	121	if (lladdr_ok)
	122	duparg("lladdr", *argv);
	123	lla = *argv;
	124	lladdr_ok = 1;
	125	} else if (strcmp(*argv, "nud") == 0) {
56f5daac SH	126	unsigned int state;
56f5daac SH	127
aba5acdf SH	128	NEXT_ARG();
	129	if (nud_state_a2n(&state, *argv))
	130	invarg("nud state is bad", *argv);
	131	req.ndm.ndm_state = state;
	132	} else if (matches(*argv, "proxy") == 0) {
	133	NEXT_ARG();
	134	if (matches(*argv, "help") == 0)
	135	usage();
	136	if (dst_ok)
	137	duparg("address", *argv);
	138	get_addr(&dst, *argv, preferred_family);
	139	dst_ok = 1;
e834eb8e	140	dev_ok = 1;
aba5acdf	141	req.ndm.ndm_flags \|= NTF_PROXY;
c2cd14ac RP	142	} else if (strcmp(*argv, "router") == 0) {
c2cd14ac RP	143	req.ndm.ndm_flags \|= NTF_ROUTER;
aba5acdf SH	144	} else if (strcmp(*argv, "dev") == 0) {
aba5acdf SH	145	NEXT_ARG();
e834eb8e KK	146	dev = *argv;
e834eb8e KK	147	dev_ok = 1;
aba5acdf SH	148	} else {
	149	if (strcmp(*argv, "to") == 0) {
	150	NEXT_ARG();
	151	}
	152	if (matches(*argv, "help") == 0) {
	153	NEXT_ARG();
	154	}
	155	if (dst_ok)
	156	duparg2("to", *argv);
	157	get_addr(&dst, *argv, preferred_family);
	158	dst_ok = 1;
	159	}
	160	argc--; argv++;
	161	}
e834eb8e	162	if (!dev_ok \|\| !dst_ok \|\| dst.family == AF_UNSPEC) {
aba5acdf SH	163	fprintf(stderr, "Device and destination are required arguments.\n");
	164	exit(-1);
	165	}
	166	req.ndm.ndm_family = dst.family;
542b0cc7 SH	167	if (addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen) < 0)
542b0cc7 SH	168	return -1;
aba5acdf SH	169
aba5acdf SH	170	if (lla && strcmp(lla, "null")) {
7b565754	171	char llabuf[20];
aba5acdf SH	172	int l;
	173
	174	l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
542b0cc7 SH	175	if (l < 0)
	176	return -1;
	177
	178	if (addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l) < 0)
	179	return -1;
aba5acdf SH	180	}
aba5acdf SH	181
aba5acdf SH	182	ll_init_map(&rth);
aba5acdf SH	183
fe99adbc SP	184	if (dev) {
	185	req.ndm.ndm_ifindex = ll_name_to_index(dev);
	186	if (!req.ndm.ndm_ifindex)
	187	return nodev(dev);
aba5acdf SH	188	}
aba5acdf SH	189
86bf43c7	190	if (rtnl_talk(&rth, &req.n, NULL) < 0)
aba5acdf SH	191	exit(2);
aba5acdf SH	192
351efcde	193	return 0;
aba5acdf SH	194	}
aba5acdf SH	195
aac7f725 SH	196	static void print_cacheinfo(const struct nda_cacheinfo *ci)
	197	{
	198	static int hz;
	199
	200	if (!hz)
	201	hz = get_user_hz();
	202
	203	if (ci->ndm_refcnt)
	204	print_uint(PRINT_ANY, "refcnt",
	205	" ref %u", ci->ndm_refcnt);
	206
	207	print_uint(PRINT_ANY, "used", " used %u", ci->ndm_used / hz);
	208	print_uint(PRINT_ANY, "confirmed", "/%u", ci->ndm_confirmed / hz);
7cd3f08b	209	print_uint(PRINT_ANY, "updated", "/%u", ci->ndm_updated / hz);
aac7f725 SH	210	}
	211
	212	static void print_neigh_state(unsigned int nud)
	213	{
	214
	215	open_json_array(PRINT_JSON,
	216	is_json_context() ? "state" : "");
	217
	218	#define PRINT_FLAG(f) \
	219	if (nud & NUD_##f) { \
	220	nud &= ~NUD_##f; \
	221	print_string(PRINT_ANY, NULL, " %s", #f); \
	222	}
	223
	224	PRINT_FLAG(INCOMPLETE);
	225	PRINT_FLAG(REACHABLE);
	226	PRINT_FLAG(STALE);
	227	PRINT_FLAG(DELAY);
	228	PRINT_FLAG(PROBE);
	229	PRINT_FLAG(FAILED);
	230	PRINT_FLAG(NOARP);
	231	PRINT_FLAG(PERMANENT);
	232	#undef PRINT_FLAG
	233
	234	close_json_array(PRINT_JSON, NULL);
	235	}
aba5acdf	236
50772dc5	237	int print_neigh(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
aba5acdf	238	{
56f5daac	239	FILE fp = (FILE )arg;
aba5acdf SH	240	struct ndmsg *r = NLMSG_DATA(n);
aba5acdf SH	241	int len = n->nlmsg_len;
56f5daac	242	struct rtattr *tb[NDA_MAX+1];
0d238ca2	243	static int logit = 1;
aba5acdf	244
1556e29d DS	245	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH &&
1556e29d DS	246	n->nlmsg_type != RTM_GETNEIGH) {
aba5acdf SH	247	fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
aba5acdf SH	248	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
ae665a52	249
aba5acdf SH	250	return 0;
	251	}
	252	len -= NLMSG_LENGTH(sizeof(*r));
	253	if (len < 0) {
	254	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	255	return -1;
	256	}
	257
	258	if (filter.flushb && n->nlmsg_type != RTM_NEWNEIGH)
	259	return 0;
	260
	261	if (filter.family && filter.family != r->ndm_family)
	262	return 0;
	263	if (filter.index && filter.index != r->ndm_ifindex)
	264	return 0;
	265	if (!(filter.state&r->ndm_state) &&
1dac7817	266	!(r->ndm_flags & NTF_PROXY) &&
9c6a6d84	267	!(r->ndm_flags & NTF_EXT_LEARNED) &&
aba5acdf	268	(r->ndm_state \|\| !(filter.state&0x100)) &&
aac7f725	269	(r->ndm_family != AF_DECnet))
aba5acdf SH	270	return 0;
aba5acdf SH	271
0d238ca2 DA	272	if (filter.master && !(n->nlmsg_flags & NLM_F_DUMP_FILTERED)) {
	273	if (logit) {
	274	logit = 0;
	275	fprintf(fp,
	276	"\nWARNING: Kernel does not support filtering by master device\n\n");
	277	}
	278	}
	279
aba5acdf SH	280	parse_rtattr(tb, NDA_MAX, NDA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
aba5acdf SH	281
a4270fd8 SP	282	if (inet_addr_match_rta(&filter.pfx, tb[NDA_DST]))
a4270fd8 SP	283	return 0;
56f5daac	284
aba5acdf SH	285	if (filter.unused_only && tb[NDA_CACHEINFO]) {
aba5acdf SH	286	struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
56f5daac	287
aba5acdf SH	288	if (ci->ndm_refcnt)
	289	return 0;
	290	}
	291
	292	if (filter.flushb) {
	293	struct nlmsghdr *fn;
56f5daac	294
aba5acdf SH	295	if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
	296	if (flush_update())
	297	return -1;
	298	}
56f5daac	299	fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
aba5acdf SH	300	memcpy(fn, n, n->nlmsg_len);
	301	fn->nlmsg_type = RTM_DELNEIGH;
	302	fn->nlmsg_flags = NLM_F_REQUEST;
351efcde	303	fn->nlmsg_seq = ++rth.seq;
56f5daac	304	filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
aba5acdf SH	305	filter.flushed++;
	306	if (show_stats < 2)
	307	return 0;
	308	}
	309
aac7f725	310	open_json_object(NULL);
6ea3ebaf	311	if (n->nlmsg_type == RTM_DELNEIGH)
aac7f725	312	print_bool(PRINT_ANY, "deleted", "Deleted ", true);
1556e29d	313	else if (n->nlmsg_type == RTM_GETNEIGH)
aac7f725 SH	314	print_null(PRINT_ANY, "miss", "%s ", "miss");
aac7f725 SH	315
aba5acdf	316	if (tb[NDA_DST]) {
aac7f725 SH	317	const char *dst;
	318
	319	dst = format_host_rta(r->ndm_family, tb[NDA_DST]);
	320	print_color_string(PRINT_ANY,
	321	ifa_family_color(r->ndm_family),
	322	"dst", "%s ", dst);
aba5acdf	323	}
aac7f725 SH	324
	325	if (!filter.index && r->ndm_ifindex) {
	326	if (!is_json_context())
	327	fprintf(fp, "dev ");
	328
	329	print_color_string(PRINT_ANY, COLOR_IFNAME,
	330	"dev", "%s ",
	331	ll_index_to_name(r->ndm_ifindex));
	332	}
	333
aba5acdf	334	if (tb[NDA_LLADDR]) {
aac7f725	335	const char *lladdr;
aba5acdf	336	SPRINT_BUF(b1);
6a34d291	337
aac7f725 SH	338	lladdr = ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
	339	RTA_PAYLOAD(tb[NDA_LLADDR]),
	340	ll_index_to_type(r->ndm_ifindex),
	341	b1, sizeof(b1));
aba5acdf	342
aac7f725 SH	343	if (!is_json_context())
aac7f725 SH	344	fprintf(fp, "lladdr ");
56f5daac	345
aac7f725 SH	346	print_color_string(PRINT_ANY, COLOR_MAC,
aac7f725 SH	347	"lladdr", "%s", lladdr);
69410a49	348	}
69410a49	349
aac7f725 SH	350	if (r->ndm_flags & NTF_ROUTER)
	351	print_null(PRINT_ANY, "router", " %s", "router");
	352
	353	if (r->ndm_flags & NTF_PROXY)
	354	print_null(PRINT_ANY, "proxy", " %s", "proxy");
	355
	356	if (show_stats) {
	357	if (tb[NDA_CACHEINFO])
	358	print_cacheinfo(RTA_DATA(tb[NDA_CACHEINFO]));
	359
	360	if (tb[NDA_PROBES])
	361	print_uint(PRINT_ANY, "probes", " probes %u",
	362	rta_getattr_u32(tb[NDA_PROBES]));
aba5acdf	363	}
aba5acdf	364
aac7f725 SH	365	if (r->ndm_state)
	366	print_neigh_state(r->ndm_state);
	367
	368	print_string(PRINT_FP, NULL, "\n", "");
	369	close_json_object();
	370	fflush(stdout);
	371
aba5acdf SH	372	return 0;
	373	}
	374
093b7646	375	void ipneigh_reset_filter(int ifindex)
aba5acdf SH	376	{
	377	memset(&filter, 0, sizeof(filter));
	378	filter.state = ~0;
093b7646	379	filter.index = ifindex;
aba5acdf SH	380	}
aba5acdf SH	381
d1f28cf1	382	static int do_show_or_flush(int argc, char **argv, int flush)
aba5acdf	383	{
0d238ca2 DA	384	struct {
	385	struct nlmsghdr n;
	386	struct ndmsg ndm;
56f5daac	387	char buf[256];
d17b136f PS	388	} req = {
	389	.n.nlmsg_type = RTM_GETNEIGH,
	390	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
	391	};
aba5acdf	392	char *filter_dev = NULL;
aba5acdf	393	int state_given = 0;
0d238ca2	394
093b7646	395	ipneigh_reset_filter(0);
aba5acdf SH	396
	397	if (!filter.family)
	398	filter.family = preferred_family;
	399
	400	if (flush) {
	401	if (argc <= 0) {
	402	fprintf(stderr, "Flush requires arguments.\n");
	403	return -1;
	404	}
	405	filter.state = ~(NUD_PERMANENT\|NUD_NOARP);
	406	} else
	407	filter.state = 0xFF & ~NUD_NOARP;
	408
	409	while (argc > 0) {
	410	if (strcmp(*argv, "dev") == 0) {
	411	NEXT_ARG();
	412	if (filter_dev)
	413	duparg("dev", *argv);
	414	filter_dev = *argv;
0d238ca2 DA	415	} else if (strcmp(*argv, "master") == 0) {
0d238ca2 DA	416	int ifindex;
56f5daac	417
0d238ca2 DA	418	NEXT_ARG();
	419	ifindex = ll_name_to_index(*argv);
	420	if (!ifindex)
	421	invarg("Device does not exist\n", *argv);
	422	addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
	423	filter.master = ifindex;
5db1adae DA	424	} else if (strcmp(*argv, "vrf") == 0) {
	425	int ifindex;
	426
	427	NEXT_ARG();
	428	ifindex = ll_name_to_index(*argv);
	429	if (!ifindex)
	430	invarg("Not a valid VRF name\n", *argv);
	431	if (!name_is_vrf(*argv))
	432	invarg("Not a valid VRF name\n", *argv);
	433	addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
	434	filter.master = ifindex;
aba5acdf SH	435	} else if (strcmp(*argv, "unused") == 0) {
	436	filter.unused_only = 1;
	437	} else if (strcmp(*argv, "nud") == 0) {
56f5daac SH	438	unsigned int state;
56f5daac SH	439
aba5acdf SH	440	NEXT_ARG();
	441	if (!state_given) {
	442	state_given = 1;
	443	filter.state = 0;
	444	}
	445	if (nud_state_a2n(&state, *argv)) {
	446	if (strcmp(*argv, "all") != 0)
	447	invarg("nud state is bad", *argv);
	448	state = ~0;
	449	if (flush)
	450	state &= ~NUD_NOARP;
	451	}
	452	if (state == 0)
	453	state = 0x100;
	454	filter.state \|= state;
1dac7817	455	} else if (strcmp(*argv, "proxy") == 0)
0d238ca2	456	req.ndm.ndm_flags = NTF_PROXY;
1dac7817	457	else {
aba5acdf SH	458	if (strcmp(*argv, "to") == 0) {
	459	NEXT_ARG();
	460	}
	461	if (matches(*argv, "help") == 0)
	462	usage();
a4270fd8 SP	463	if (get_prefix(&filter.pfx, *argv, filter.family))
a4270fd8 SP	464	invarg("to value is invalid\n", *argv);
aba5acdf SH	465	if (filter.family == AF_UNSPEC)
	466	filter.family = filter.pfx.family;
	467	}
	468	argc--; argv++;
	469	}
	470
aba5acdf SH	471	ll_init_map(&rth);
	472
	473	if (filter_dev) {
fe99adbc SP	474	filter.index = ll_name_to_index(filter_dev);
	475	if (!filter.index)
	476	return nodev(filter_dev);
b8c75324	477	addattr32(&req.n, sizeof(req), NDA_IFINDEX, filter.index);
aba5acdf SH	478	}
aba5acdf SH	479
1c346dcc JH	480	req.ndm.ndm_family = filter.family;
1c346dcc JH	481
aba5acdf SH	482	if (flush) {
	483	int round = 0;
	484	char flushb[4096-512];
	485
	486	filter.flushb = flushb;
	487	filter.flushp = 0;
	488	filter.flushe = sizeof(flushb);
aba5acdf	489
66081849	490	while (round < MAX_ROUNDS) {
1c346dcc	491	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
aba5acdf SH	492	perror("Cannot send dump request");
	493	exit(1);
	494	}
	495	filter.flushed = 0;
cd70f3f5	496	if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
aba5acdf SH	497	fprintf(stderr, "Flush terminated\n");
	498	exit(1);
	499	}
	500	if (filter.flushed == 0) {
f0b34d2d AH	501	if (show_stats) {
	502	if (round == 0)
	503	printf("Nothing to flush.\n");
	504	else
56f5daac	505	printf("* Flush is complete after %d round%s *\n", round, round > 1?"s":"");
f0b34d2d	506	}
aba5acdf SH	507	fflush(stdout);
	508	return 0;
	509	}
	510	round++;
	511	if (flush_update() < 0)
	512	exit(1);
	513	if (show_stats) {
	514	printf("\n* Round %d, deleting %d entries *\n", round, filter.flushed);
	515	fflush(stdout);
	516	}
ad0a6a2c	517	filter.state &= ~NUD_FAILED;
aba5acdf	518	}
66081849 SH	519	printf("*** Flush not complete bailing out after %d rounds\n",
	520	MAX_ROUNDS);
	521	return 1;
aba5acdf SH	522	}
aba5acdf SH	523
0d238ca2	524	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
aba5acdf SH	525	perror("Cannot send dump request");
	526	exit(1);
	527	}
	528
aac7f725	529	new_json_obj(json);
cd70f3f5	530	if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
aba5acdf SH	531	fprintf(stderr, "Dump terminated\n");
	532	exit(1);
	533	}
aac7f725	534	delete_json_obj();
aba5acdf SH	535
	536	return 0;
	537	}
	538
	539	int do_ipneigh(int argc, char **argv)
	540	{
	541	if (argc > 0) {
	542	if (matches(*argv, "add") == 0)
	543	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_EXCL, argc-1, argv+1);
	544	if (matches(*argv, "change") == 0 \|\|
	545	strcmp(*argv, "chg") == 0)
	546	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_REPLACE, argc-1, argv+1);
	547	if (matches(*argv, "replace") == 0)
	548	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_REPLACE, argc-1, argv+1);
	549	if (matches(*argv, "delete") == 0)
	550	return ipneigh_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
	551	if (matches(*argv, "get") == 0) {
	552	fprintf(stderr, "Sorry, \"neigh get\" is not implemented :-(\n");
	553	return -1;
	554	}
	555	if (matches(*argv, "show") == 0 \|\|
	556	matches(*argv, "lst") == 0 \|\|
	557	matches(*argv, "list") == 0)
	558	return do_show_or_flush(argc-1, argv+1, 0);
	559	if (matches(*argv, "flush") == 0)
	560	return do_show_or_flush(argc-1, argv+1, 1);
	561	if (matches(*argv, "help") == 0)
	562	usage();
	563	} else
	564	return do_show_or_flush(0, NULL, 0);
	565
	566	fprintf(stderr, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv);
	567	exit(-1);
	568	}