[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;
	int protocol;
} 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, "                [ router ] [ extern_learn ] [ protocol PROTO ]\n\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 (matches(*argv, "extern_learn") == 0) {
			req.ndm.ndm_flags |= NTF_EXT_LEARNED;
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			dev = *argv;
			dev_ok = 1;
		} else if (matches(*argv, "protocol") == 0) {
			__u32 proto;

			NEXT_ARG();
			if (rtnl_rtprot_a2n(&proto, *argv))
				invarg("\"protocol\" value is invalid\n", *argv);
			if (addattr8(&req.n, sizeof(req), NDA_PROTOCOL, proto))
				return -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(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;
	__u8 protocol = 0;

	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 (tb[NDA_PROTOCOL])
		protocol = rta_getattr_u8(tb[NDA_PROTOCOL]);

	if (filter.protocol && filter.protocol != protocol)
		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 (r->ndm_flags & NTF_EXT_LEARNED)
		print_null(PRINT_ANY, "extern_learn", " %s ", "extern_learn");

	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);

	if (protocol) {
		SPRINT_BUF(b1);

		print_string(PRINT_ANY, "protocol", " proto %s ",
			     rtnl_rtprot_n2a(protocol, b1, sizeof(b1)));
	}

	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 (matches(*argv, "protocol") == 0) {
			__u32 prot;

			NEXT_ARG();
			if (rtnl_rtprot_a2n(&prot, *argv)) {
				if (strcmp(*argv, "all"))
					invarg("invalid \"protocol\"\n", *argv);
				prot = 0;
			}
			filter.protocol = prot;
		} 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;
6b83edc0	43	int protocol;
aba5acdf SH	44	} filter;
	45
	46	static void usage(void) __attribute__((noreturn));
	47
	48	static void usage(void)
	49	{
03a0cf20 PS	50	fprintf(stderr, "Usage: ip neigh { add \| del \| change \| replace }\n"
03a0cf20 PS	51	" { ADDR [ lladdr LLADDR ] [ nud STATE ] \| proxy ADDR } [ dev DEV ]\n");
6b83edc0	52	fprintf(stderr, " [ router ] [ extern_learn ] [ protocol PROTO ]\n\n");
5db1adae DA	53	fprintf(stderr, " ip neigh { show \| flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n");
5db1adae DA	54	fprintf(stderr, " [ vrf NAME ]\n\n");
03a0cf20	55	fprintf(stderr, "STATE := { permanent \| noarp \| stale \| reachable \| none \|\n"
56f5daac	56	" incomplete \| delay \| probe \| failed }\n");
aba5acdf SH	57	exit(-1);
	58	}
	59
56f5daac	60	static int nud_state_a2n(unsigned int state, const char arg)
aba5acdf SH	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;
56f5daac	83	if (state >= 0x100 \|\| (state&((*state)-1)))
aba5acdf SH	84	return -1;
	85	}
	86	return 0;
	87	}
	88
aba5acdf SH	89	static int flush_update(void)
aba5acdf SH	90	{
f31a37f7	91	if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
1fb0a998	92	perror("Failed to send flush request");
aba5acdf SH	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	{
aba5acdf	102	struct {
4806867a SH	103	struct nlmsghdr n;
4806867a SH	104	struct ndmsg ndm;
56f5daac	105	char buf[256];
d17b136f PS	106	} req = {
	107	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
	108	.n.nlmsg_flags = NLM_F_REQUEST \| flags,
	109	.n.nlmsg_type = cmd,
	110	.ndm.ndm_family = preferred_family,
	111	.ndm.ndm_state = NUD_PERMANENT,
	112	};
e834eb8e	113	char *dev = NULL;
aba5acdf	114	int dst_ok = 0;
e834eb8e	115	int dev_ok = 0;
aba5acdf	116	int lladdr_ok = 0;
56f5daac	117	char *lla = NULL;
aba5acdf SH	118	inet_prefix dst;
aba5acdf SH	119
aba5acdf SH	120	while (argc > 0) {
	121	if (matches(*argv, "lladdr") == 0) {
	122	NEXT_ARG();
	123	if (lladdr_ok)
	124	duparg("lladdr", *argv);
	125	lla = *argv;
	126	lladdr_ok = 1;
	127	} else if (strcmp(*argv, "nud") == 0) {
56f5daac SH	128	unsigned int state;
56f5daac SH	129
aba5acdf SH	130	NEXT_ARG();
	131	if (nud_state_a2n(&state, *argv))
	132	invarg("nud state is bad", *argv);
	133	req.ndm.ndm_state = state;
	134	} else if (matches(*argv, "proxy") == 0) {
	135	NEXT_ARG();
	136	if (matches(*argv, "help") == 0)
	137	usage();
	138	if (dst_ok)
	139	duparg("address", *argv);
	140	get_addr(&dst, *argv, preferred_family);
	141	dst_ok = 1;
e834eb8e	142	dev_ok = 1;
aba5acdf	143	req.ndm.ndm_flags \|= NTF_PROXY;
c2cd14ac RP	144	} else if (strcmp(*argv, "router") == 0) {
c2cd14ac RP	145	req.ndm.ndm_flags \|= NTF_ROUTER;
4c45b684 RP	146	} else if (matches(*argv, "extern_learn") == 0) {
4c45b684 RP	147	req.ndm.ndm_flags \|= NTF_EXT_LEARNED;
aba5acdf SH	148	} else if (strcmp(*argv, "dev") == 0) {
aba5acdf SH	149	NEXT_ARG();
e834eb8e KK	150	dev = *argv;
e834eb8e KK	151	dev_ok = 1;
6b83edc0 DA	152	} else if (matches(*argv, "protocol") == 0) {
	153	__u32 proto;
	154
	155	NEXT_ARG();
	156	if (rtnl_rtprot_a2n(&proto, *argv))
	157	invarg("\"protocol\" value is invalid\n", *argv);
	158	if (addattr8(&req.n, sizeof(req), NDA_PROTOCOL, proto))
	159	return -1;
aba5acdf SH	160	} else {
	161	if (strcmp(*argv, "to") == 0) {
	162	NEXT_ARG();
	163	}
	164	if (matches(*argv, "help") == 0) {
	165	NEXT_ARG();
	166	}
	167	if (dst_ok)
	168	duparg2("to", *argv);
	169	get_addr(&dst, *argv, preferred_family);
	170	dst_ok = 1;
	171	}
	172	argc--; argv++;
	173	}
e834eb8e	174	if (!dev_ok \|\| !dst_ok \|\| dst.family == AF_UNSPEC) {
aba5acdf SH	175	fprintf(stderr, "Device and destination are required arguments.\n");
	176	exit(-1);
	177	}
	178	req.ndm.ndm_family = dst.family;
542b0cc7 SH	179	if (addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen) < 0)
542b0cc7 SH	180	return -1;
aba5acdf SH	181
aba5acdf SH	182	if (lla && strcmp(lla, "null")) {
7b565754	183	char llabuf[20];
aba5acdf SH	184	int l;
	185
	186	l = ll_addr_a2n(llabuf, sizeof(llabuf), lla);
542b0cc7 SH	187	if (l < 0)
	188	return -1;
	189
	190	if (addattr_l(&req.n, sizeof(req), NDA_LLADDR, llabuf, l) < 0)
	191	return -1;
aba5acdf SH	192	}
aba5acdf SH	193
aba5acdf SH	194	ll_init_map(&rth);
aba5acdf SH	195
fe99adbc SP	196	if (dev) {
	197	req.ndm.ndm_ifindex = ll_name_to_index(dev);
	198	if (!req.ndm.ndm_ifindex)
	199	return nodev(dev);
aba5acdf SH	200	}
aba5acdf SH	201
86bf43c7	202	if (rtnl_talk(&rth, &req.n, NULL) < 0)
aba5acdf SH	203	exit(2);
aba5acdf SH	204
351efcde	205	return 0;
aba5acdf SH	206	}
aba5acdf SH	207
aac7f725 SH	208	static void print_cacheinfo(const struct nda_cacheinfo *ci)
	209	{
	210	static int hz;
	211
	212	if (!hz)
	213	hz = get_user_hz();
	214
	215	if (ci->ndm_refcnt)
	216	print_uint(PRINT_ANY, "refcnt",
	217	" ref %u", ci->ndm_refcnt);
	218
	219	print_uint(PRINT_ANY, "used", " used %u", ci->ndm_used / hz);
	220	print_uint(PRINT_ANY, "confirmed", "/%u", ci->ndm_confirmed / hz);
7cd3f08b	221	print_uint(PRINT_ANY, "updated", "/%u", ci->ndm_updated / hz);
aac7f725 SH	222	}
	223
	224	static void print_neigh_state(unsigned int nud)
	225	{
	226
	227	open_json_array(PRINT_JSON,
	228	is_json_context() ? "state" : "");
	229
	230	#define PRINT_FLAG(f) \
	231	if (nud & NUD_##f) { \
	232	nud &= ~NUD_##f; \
	233	print_string(PRINT_ANY, NULL, " %s", #f); \
	234	}
	235
	236	PRINT_FLAG(INCOMPLETE);
	237	PRINT_FLAG(REACHABLE);
	238	PRINT_FLAG(STALE);
	239	PRINT_FLAG(DELAY);
	240	PRINT_FLAG(PROBE);
	241	PRINT_FLAG(FAILED);
	242	PRINT_FLAG(NOARP);
	243	PRINT_FLAG(PERMANENT);
	244	#undef PRINT_FLAG
	245
	246	close_json_array(PRINT_JSON, NULL);
	247	}
aba5acdf	248
cd554f2c	249	int print_neigh(struct nlmsghdr n, void arg)
aba5acdf	250	{
56f5daac	251	FILE fp = (FILE )arg;
aba5acdf SH	252	struct ndmsg *r = NLMSG_DATA(n);
aba5acdf SH	253	int len = n->nlmsg_len;
56f5daac	254	struct rtattr *tb[NDA_MAX+1];
0d238ca2	255	static int logit = 1;
6b83edc0	256	__u8 protocol = 0;
aba5acdf	257
1556e29d DS	258	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH &&
1556e29d DS	259	n->nlmsg_type != RTM_GETNEIGH) {
aba5acdf SH	260	fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
aba5acdf SH	261	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
ae665a52	262
aba5acdf SH	263	return 0;
	264	}
	265	len -= NLMSG_LENGTH(sizeof(*r));
	266	if (len < 0) {
	267	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	268	return -1;
	269	}
	270
	271	if (filter.flushb && n->nlmsg_type != RTM_NEWNEIGH)
	272	return 0;
	273
	274	if (filter.family && filter.family != r->ndm_family)
	275	return 0;
	276	if (filter.index && filter.index != r->ndm_ifindex)
	277	return 0;
	278	if (!(filter.state&r->ndm_state) &&
1dac7817	279	!(r->ndm_flags & NTF_PROXY) &&
9c6a6d84	280	!(r->ndm_flags & NTF_EXT_LEARNED) &&
aba5acdf	281	(r->ndm_state \|\| !(filter.state&0x100)) &&
aac7f725	282	(r->ndm_family != AF_DECnet))
aba5acdf SH	283	return 0;
aba5acdf SH	284
0d238ca2 DA	285	if (filter.master && !(n->nlmsg_flags & NLM_F_DUMP_FILTERED)) {
	286	if (logit) {
	287	logit = 0;
	288	fprintf(fp,
	289	"\nWARNING: Kernel does not support filtering by master device\n\n");
	290	}
	291	}
	292
aba5acdf SH	293	parse_rtattr(tb, NDA_MAX, NDA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
aba5acdf SH	294
a4270fd8 SP	295	if (inet_addr_match_rta(&filter.pfx, tb[NDA_DST]))
a4270fd8 SP	296	return 0;
56f5daac	297
6b83edc0 DA	298	if (tb[NDA_PROTOCOL])
	299	protocol = rta_getattr_u8(tb[NDA_PROTOCOL]);
	300
	301	if (filter.protocol && filter.protocol != protocol)
	302	return 0;
	303
aba5acdf SH	304	if (filter.unused_only && tb[NDA_CACHEINFO]) {
aba5acdf SH	305	struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
56f5daac	306
aba5acdf SH	307	if (ci->ndm_refcnt)
	308	return 0;
	309	}
	310
	311	if (filter.flushb) {
	312	struct nlmsghdr *fn;
56f5daac	313
aba5acdf SH	314	if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
	315	if (flush_update())
	316	return -1;
	317	}
56f5daac	318	fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
aba5acdf SH	319	memcpy(fn, n, n->nlmsg_len);
	320	fn->nlmsg_type = RTM_DELNEIGH;
	321	fn->nlmsg_flags = NLM_F_REQUEST;
351efcde	322	fn->nlmsg_seq = ++rth.seq;
56f5daac	323	filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
aba5acdf SH	324	filter.flushed++;
	325	if (show_stats < 2)
	326	return 0;
	327	}
	328
aac7f725	329	open_json_object(NULL);
6ea3ebaf	330	if (n->nlmsg_type == RTM_DELNEIGH)
aac7f725	331	print_bool(PRINT_ANY, "deleted", "Deleted ", true);
1556e29d	332	else if (n->nlmsg_type == RTM_GETNEIGH)
aac7f725 SH	333	print_null(PRINT_ANY, "miss", "%s ", "miss");
aac7f725 SH	334
aba5acdf	335	if (tb[NDA_DST]) {
aac7f725 SH	336	const char *dst;
	337
	338	dst = format_host_rta(r->ndm_family, tb[NDA_DST]);
	339	print_color_string(PRINT_ANY,
	340	ifa_family_color(r->ndm_family),
	341	"dst", "%s ", dst);
aba5acdf	342	}
aac7f725 SH	343
	344	if (!filter.index && r->ndm_ifindex) {
	345	if (!is_json_context())
	346	fprintf(fp, "dev ");
	347
	348	print_color_string(PRINT_ANY, COLOR_IFNAME,
	349	"dev", "%s ",
	350	ll_index_to_name(r->ndm_ifindex));
	351	}
	352
aba5acdf	353	if (tb[NDA_LLADDR]) {
aac7f725	354	const char *lladdr;
aba5acdf	355	SPRINT_BUF(b1);
6a34d291	356
aac7f725 SH	357	lladdr = ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
	358	RTA_PAYLOAD(tb[NDA_LLADDR]),
	359	ll_index_to_type(r->ndm_ifindex),
	360	b1, sizeof(b1));
aba5acdf	361
aac7f725 SH	362	if (!is_json_context())
aac7f725 SH	363	fprintf(fp, "lladdr ");
56f5daac	364
aac7f725 SH	365	print_color_string(PRINT_ANY, COLOR_MAC,
aac7f725 SH	366	"lladdr", "%s", lladdr);
69410a49	367	}
69410a49	368
aac7f725 SH	369	if (r->ndm_flags & NTF_ROUTER)
	370	print_null(PRINT_ANY, "router", " %s", "router");
	371
	372	if (r->ndm_flags & NTF_PROXY)
	373	print_null(PRINT_ANY, "proxy", " %s", "proxy");
	374
4c45b684 RP	375	if (r->ndm_flags & NTF_EXT_LEARNED)
	376	print_null(PRINT_ANY, "extern_learn", " %s ", "extern_learn");
	377
aac7f725 SH	378	if (show_stats) {
	379	if (tb[NDA_CACHEINFO])
	380	print_cacheinfo(RTA_DATA(tb[NDA_CACHEINFO]));
	381
	382	if (tb[NDA_PROBES])
	383	print_uint(PRINT_ANY, "probes", " probes %u",
	384	rta_getattr_u32(tb[NDA_PROBES]));
aba5acdf	385	}
aba5acdf	386
aac7f725 SH	387	if (r->ndm_state)
	388	print_neigh_state(r->ndm_state);
	389
6b83edc0 DA	390	if (protocol) {
	391	SPRINT_BUF(b1);
	392
	393	print_string(PRINT_ANY, "protocol", " proto %s ",
	394	rtnl_rtprot_n2a(protocol, b1, sizeof(b1)));
	395	}
	396
aac7f725 SH	397	print_string(PRINT_FP, NULL, "\n", "");
	398	close_json_object();
	399	fflush(stdout);
	400
aba5acdf SH	401	return 0;
	402	}
	403
093b7646	404	void ipneigh_reset_filter(int ifindex)
aba5acdf SH	405	{
	406	memset(&filter, 0, sizeof(filter));
	407	filter.state = ~0;
093b7646	408	filter.index = ifindex;
aba5acdf SH	409	}
aba5acdf SH	410
d1f28cf1	411	static int do_show_or_flush(int argc, char **argv, int flush)
aba5acdf	412	{
0d238ca2 DA	413	struct {
	414	struct nlmsghdr n;
	415	struct ndmsg ndm;
56f5daac	416	char buf[256];
d17b136f PS	417	} req = {
	418	.n.nlmsg_type = RTM_GETNEIGH,
	419	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
	420	};
aba5acdf	421	char *filter_dev = NULL;
aba5acdf	422	int state_given = 0;
0d238ca2	423
093b7646	424	ipneigh_reset_filter(0);
aba5acdf SH	425
	426	if (!filter.family)
	427	filter.family = preferred_family;
	428
	429	if (flush) {
	430	if (argc <= 0) {
	431	fprintf(stderr, "Flush requires arguments.\n");
	432	return -1;
	433	}
	434	filter.state = ~(NUD_PERMANENT\|NUD_NOARP);
	435	} else
	436	filter.state = 0xFF & ~NUD_NOARP;
	437
	438	while (argc > 0) {
	439	if (strcmp(*argv, "dev") == 0) {
	440	NEXT_ARG();
	441	if (filter_dev)
	442	duparg("dev", *argv);
	443	filter_dev = *argv;
0d238ca2 DA	444	} else if (strcmp(*argv, "master") == 0) {
0d238ca2 DA	445	int ifindex;
56f5daac	446
0d238ca2 DA	447	NEXT_ARG();
	448	ifindex = ll_name_to_index(*argv);
	449	if (!ifindex)
	450	invarg("Device does not exist\n", *argv);
	451	addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
	452	filter.master = ifindex;
5db1adae DA	453	} else if (strcmp(*argv, "vrf") == 0) {
	454	int ifindex;
	455
	456	NEXT_ARG();
	457	ifindex = ll_name_to_index(*argv);
	458	if (!ifindex)
	459	invarg("Not a valid VRF name\n", *argv);
	460	if (!name_is_vrf(*argv))
	461	invarg("Not a valid VRF name\n", *argv);
	462	addattr32(&req.n, sizeof(req), NDA_MASTER, ifindex);
	463	filter.master = ifindex;
aba5acdf SH	464	} else if (strcmp(*argv, "unused") == 0) {
	465	filter.unused_only = 1;
	466	} else if (strcmp(*argv, "nud") == 0) {
56f5daac SH	467	unsigned int state;
56f5daac SH	468
aba5acdf SH	469	NEXT_ARG();
	470	if (!state_given) {
	471	state_given = 1;
	472	filter.state = 0;
	473	}
	474	if (nud_state_a2n(&state, *argv)) {
	475	if (strcmp(*argv, "all") != 0)
	476	invarg("nud state is bad", *argv);
	477	state = ~0;
	478	if (flush)
	479	state &= ~NUD_NOARP;
	480	}
	481	if (state == 0)
	482	state = 0x100;
	483	filter.state \|= state;
6b83edc0	484	} else if (strcmp(*argv, "proxy") == 0) {
0d238ca2	485	req.ndm.ndm_flags = NTF_PROXY;
6b83edc0 DA	486	} else if (matches(*argv, "protocol") == 0) {
	487	__u32 prot;
	488
	489	NEXT_ARG();
	490	if (rtnl_rtprot_a2n(&prot, *argv)) {
	491	if (strcmp(*argv, "all"))
	492	invarg("invalid \"protocol\"\n", *argv);
	493	prot = 0;
	494	}
	495	filter.protocol = prot;
	496	} else {
aba5acdf SH	497	if (strcmp(*argv, "to") == 0) {
	498	NEXT_ARG();
	499	}
	500	if (matches(*argv, "help") == 0)
	501	usage();
a4270fd8 SP	502	if (get_prefix(&filter.pfx, *argv, filter.family))
a4270fd8 SP	503	invarg("to value is invalid\n", *argv);
aba5acdf SH	504	if (filter.family == AF_UNSPEC)
	505	filter.family = filter.pfx.family;
	506	}
	507	argc--; argv++;
	508	}
	509
aba5acdf SH	510	ll_init_map(&rth);
	511
	512	if (filter_dev) {
fe99adbc SP	513	filter.index = ll_name_to_index(filter_dev);
	514	if (!filter.index)
	515	return nodev(filter_dev);
b8c75324	516	addattr32(&req.n, sizeof(req), NDA_IFINDEX, filter.index);
aba5acdf SH	517	}
aba5acdf SH	518
1c346dcc JH	519	req.ndm.ndm_family = filter.family;
1c346dcc JH	520
aba5acdf SH	521	if (flush) {
	522	int round = 0;
	523	char flushb[4096-512];
	524
	525	filter.flushb = flushb;
	526	filter.flushp = 0;
	527	filter.flushe = sizeof(flushb);
aba5acdf	528
66081849	529	while (round < MAX_ROUNDS) {
1c346dcc	530	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
aba5acdf SH	531	perror("Cannot send dump request");
	532	exit(1);
	533	}
	534	filter.flushed = 0;
cd70f3f5	535	if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
aba5acdf SH	536	fprintf(stderr, "Flush terminated\n");
	537	exit(1);
	538	}
	539	if (filter.flushed == 0) {
f0b34d2d AH	540	if (show_stats) {
	541	if (round == 0)
	542	printf("Nothing to flush.\n");
	543	else
56f5daac	544	printf("* Flush is complete after %d round%s *\n", round, round > 1?"s":"");
f0b34d2d	545	}
aba5acdf SH	546	fflush(stdout);
	547	return 0;
	548	}
	549	round++;
	550	if (flush_update() < 0)
	551	exit(1);
	552	if (show_stats) {
	553	printf("\n* Round %d, deleting %d entries *\n", round, filter.flushed);
	554	fflush(stdout);
	555	}
ad0a6a2c	556	filter.state &= ~NUD_FAILED;
aba5acdf	557	}
66081849 SH	558	printf("*** Flush not complete bailing out after %d rounds\n",
	559	MAX_ROUNDS);
	560	return 1;
aba5acdf SH	561	}
aba5acdf SH	562
0d238ca2	563	if (rtnl_dump_request_n(&rth, &req.n) < 0) {
aba5acdf SH	564	perror("Cannot send dump request");
	565	exit(1);
	566	}
	567
aac7f725	568	new_json_obj(json);
cd70f3f5	569	if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
aba5acdf SH	570	fprintf(stderr, "Dump terminated\n");
	571	exit(1);
	572	}
aac7f725	573	delete_json_obj();
aba5acdf SH	574
	575	return 0;
	576	}
	577
	578	int do_ipneigh(int argc, char **argv)
	579	{
	580	if (argc > 0) {
	581	if (matches(*argv, "add") == 0)
	582	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_EXCL, argc-1, argv+1);
	583	if (matches(*argv, "change") == 0 \|\|
	584	strcmp(*argv, "chg") == 0)
	585	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_REPLACE, argc-1, argv+1);
	586	if (matches(*argv, "replace") == 0)
	587	return ipneigh_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_REPLACE, argc-1, argv+1);
	588	if (matches(*argv, "delete") == 0)
	589	return ipneigh_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
	590	if (matches(*argv, "get") == 0) {
	591	fprintf(stderr, "Sorry, \"neigh get\" is not implemented :-(\n");
	592	return -1;
	593	}
	594	if (matches(*argv, "show") == 0 \|\|
	595	matches(*argv, "lst") == 0 \|\|
	596	matches(*argv, "list") == 0)
	597	return do_show_or_flush(argc-1, argv+1, 0);
	598	if (matches(*argv, "flush") == 0)
	599	return do_show_or_flush(argc-1, argv+1, 1);
	600	if (matches(*argv, "help") == 0)
	601	usage();
	602	} else
	603	return do_show_or_flush(0, NULL, 0);
	604
	605	fprintf(stderr, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv);
	606	exit(-1);
	607	}