[mirror_iproute2.git] / bridge / fdb.c

/*
 * Get/set/delete fdb table with netlink
 *
 * TODO: merge/replace this with ip neighbour
 *
 * Authors:	Stephen Hemminger <shemminger@vyatta.com>
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/if.h>
#include <netinet/in.h>
#include <linux/if_bridge.h>
#include <linux/if_ether.h>
#include <linux/neighbour.h>
#include <string.h>

#include "libnetlink.h"
#include "br_common.h"
#include "rt_names.h"
#include "utils.h"

int filter_index;

static void usage(void)
{
	fprintf(stderr, "Usage: bridge fdb { add | del } ADDR dev DEV {self|master} [ temp ]\n"
		        "              [ dst IPADDR] [ vlan VID ]\n");
	fprintf(stderr, "       bridge fdb {show} [ dev DEV ]\n");
	exit(-1);
}

static const char *state_n2a(unsigned s)
{
	static char buf[32];

	if (s & NUD_PERMANENT)
		return "permanent";

	if (s & NUD_NOARP)
		return "static";

	if (s & NUD_STALE)
		return "stale";

	if (s & NUD_REACHABLE)
		return "";

	sprintf(buf, "state=%#x", s);
	return buf;
}

int print_fdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	FILE *fp = arg;
	struct ndmsg *r = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr * tb[NDA_MAX+1];

	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) {
		fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);

		return 0;
	}

	len -= NLMSG_LENGTH(sizeof(*r));
	if (len < 0) {
		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
		return -1;
	}

	if (r->ndm_family != AF_BRIDGE)
		return 0;

	if (filter_index && filter_index != r->ndm_ifindex)
		return 0;

	parse_rtattr(tb, NDA_MAX, NDA_RTA(r),
		     n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));

	if (n->nlmsg_type == RTM_DELNEIGH)
		fprintf(fp, "Deleted ");

	if (tb[NDA_LLADDR]) {
		SPRINT_BUF(b1);
		fprintf(fp, "%s ",
			ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
				    RTA_PAYLOAD(tb[NDA_LLADDR]),
				    ll_index_to_type(r->ndm_ifindex),
				    b1, sizeof(b1)));
	}

	if (!filter_index && r->ndm_ifindex)
		fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex));

	if (tb[NDA_DST]) {
		SPRINT_BUF(abuf);
		fprintf(fp, "dst %s ",
			format_host(AF_INET,
				    RTA_PAYLOAD(tb[NDA_DST]),
				    RTA_DATA(tb[NDA_DST]),
				    abuf, sizeof(abuf)));
	}

	if (tb[NDA_VLAN]) {
		__u16 vid = rta_getattr_u16(tb[NDA_VLAN]);
		fprintf(fp, "vlan %hu ", vid);
	}

	if (show_stats && tb[NDA_CACHEINFO]) {
		struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
		int hz = get_user_hz();

		fprintf(fp, " used %d/%d", ci->ndm_used/hz,
		       ci->ndm_updated/hz);
	}
	if (r->ndm_flags & NTF_SELF)
		fprintf(fp, "self ");
	if (r->ndm_flags & NTF_MASTER)
		fprintf(fp, "master ");

	fprintf(fp, "%s\n", state_n2a(r->ndm_state));
	return 0;
}

static int fdb_show(int argc, char **argv)
{
	char *filter_dev = NULL;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			if (filter_dev)
				duparg("dev", *argv);
			filter_dev = *argv;
		}
		argc--; argv++;
	}

	if (filter_dev) {
		filter_index = if_nametoindex(filter_dev);
		if (filter_index == 0) {
			fprintf(stderr, "Cannot find device \"%s\"\n",
				filter_dev);
			return -1;
		}
	}

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

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

	return 0;
}

static int fdb_modify(int cmd, int flags, int argc, char **argv)
{
	struct {
		struct nlmsghdr 	n;
		struct ndmsg 		ndm;
		char   			buf[256];
	} req;
	char *addr = NULL;
	char *d = NULL;
	char abuf[ETH_ALEN];
	int dst_ok = 0;
	inet_prefix dst;
	short vid = -1;

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

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
	req.n.nlmsg_type = cmd;
	req.ndm.ndm_family = PF_BRIDGE;
	req.ndm.ndm_state = NUD_NOARP;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			d = *argv;
		} else if (strcmp(*argv, "dst") == 0) {
			NEXT_ARG();
			if (dst_ok)
				duparg2("dst", *argv);
			get_addr(&dst, *argv, preferred_family);
			dst_ok = 1;
		} else if (strcmp(*argv, "self") == 0) {
			req.ndm.ndm_flags |= NTF_SELF;
		} else if (matches(*argv, "master") == 0) {
			req.ndm.ndm_flags |= NTF_MASTER;
		} else if (matches(*argv, "local") == 0||
			   matches(*argv, "permanent") == 0) {
			req.ndm.ndm_state |= NUD_PERMANENT;
		} else if (matches(*argv, "temp") == 0) {
			req.ndm.ndm_state |= NUD_REACHABLE;
		} else if (matches(*argv, "vlan") == 0) {
			if (vid >= 0)
				duparg2("vlan", *argv);
			NEXT_ARG();
			vid = atoi(*argv);
		} else {
			if (strcmp(*argv, "to") == 0) {
				NEXT_ARG();
			}
			if (matches(*argv, "help") == 0)
				usage();
			if (addr)
				duparg2("to", *argv);
			addr = *argv;
		}
		argc--; argv++;
	}

	if (d == NULL || addr == NULL) {
		fprintf(stderr, "Device and address are required arguments.\n");
		exit(-1);
	}

	/* Assume self */
	if (!(req.ndm.ndm_flags&(NTF_SELF|NTF_MASTER)))
		req.ndm.ndm_flags |= NTF_SELF;

	/* Assume permanent */
	if (!(req.ndm.ndm_state&(NUD_PERMANENT|NUD_REACHABLE)))
		req.ndm.ndm_state |= NUD_PERMANENT;

	if (sscanf(addr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
		   abuf, abuf+1, abuf+2,
		   abuf+3, abuf+4, abuf+5) != 6) {
		fprintf(stderr, "Invalid mac address %s\n", addr);
		exit(-1);
	}

	addattr_l(&req.n, sizeof(req), NDA_LLADDR, abuf, ETH_ALEN);
	if (dst_ok)
		addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen);

	if (vid >= 0)
		addattr16(&req.n, sizeof(req), NDA_VLAN, vid);

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

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

	return 0;
}

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

	if (argc > 0) {
		if (matches(*argv, "add") == 0)
			return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1);
		if (matches(*argv, "delete") == 0)
			return fdb_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
		if (matches(*argv, "show") == 0 ||
		    matches(*argv, "lst") == 0 ||
		    matches(*argv, "list") == 0)
			return fdb_show(argc-1, argv+1);
		if (matches(*argv, "help") == 0)
			usage();
	} else
		return fdb_show(0, NULL);

	fprintf(stderr, "Command \"%s\" is unknown, try \"bridge fdb help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
d04bc300 SH	1	/*
	2	* Get/set/delete fdb table with netlink
	3	*
0849e60a SH	4	* TODO: merge/replace this with ip neighbour
0849e60a SH	5	*
d04bc300 SH	6	* Authors: Stephen Hemminger <shemminger@vyatta.com>
	7	*/
	8
	9	#include <stdio.h>
	10	#include <stdlib.h>
	11	#include <unistd.h>
	12	#include <time.h>
	13	#include <fcntl.h>
	14	#include <sys/socket.h>
	15	#include <sys/time.h>
	16	#include <net/if.h>
	17	#include <netinet/in.h>
	18	#include <linux/if_bridge.h>
	19	#include <linux/if_ether.h>
	20	#include <linux/neighbour.h>
	21	#include <string.h>
	22
	23	#include "libnetlink.h"
	24	#include "br_common.h"
0849e60a	25	#include "rt_names.h"
d04bc300 SH	26	#include "utils.h"
	27
	28	int filter_index;
	29
	30	static void usage(void)
	31	{
8ae66094 SH	32	fprintf(stderr, "Usage: bridge fdb { add \| del } ADDR dev DEV {self\|master} [ temp ]\n"
8ae66094 SH	33	" [ dst IPADDR] [ vlan VID ]\n");
90698170	34	fprintf(stderr, " bridge fdb {show} [ dev DEV ]\n");
d04bc300 SH	35	exit(-1);
	36	}
	37
	38	static const char *state_n2a(unsigned s)
	39	{
	40	static char buf[32];
	41
0849e60a SH	42	if (s & NUD_PERMANENT)
0849e60a SH	43	return "permanent";
d04bc300 SH	44
	45	if (s & NUD_NOARP)
	46	return "static";
	47
	48	if (s & NUD_STALE)
	49	return "stale";
0849e60a	50
d04bc300 SH	51	if (s & NUD_REACHABLE)
	52	return "";
	53
	54	sprintf(buf, "state=%#x", s);
	55	return buf;
	56	}
	57
d04bc300 SH	58	int print_fdb(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
d04bc300 SH	59	{
0849e60a	60	FILE *fp = arg;
d04bc300 SH	61	struct ndmsg *r = NLMSG_DATA(n);
	62	int len = n->nlmsg_len;
	63	struct rtattr * tb[NDA_MAX+1];
0849e60a SH	64
	65	if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) {
	66	fprintf(stderr, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
	67	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
	68
	69	return 0;
	70	}
d04bc300 SH	71
	72	len -= NLMSG_LENGTH(sizeof(*r));
	73	if (len < 0) {
	74	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	75	return -1;
	76	}
	77
	78	if (r->ndm_family != AF_BRIDGE)
	79	return 0;
	80
	81	if (filter_index && filter_index != r->ndm_ifindex)
	82	return 0;
	83
	84	parse_rtattr(tb, NDA_MAX, NDA_RTA(r),
	85	n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
	86
	87	if (n->nlmsg_type == RTM_DELNEIGH)
0849e60a SH	88	fprintf(fp, "Deleted ");
	89
	90	if (tb[NDA_LLADDR]) {
	91	SPRINT_BUF(b1);
	92	fprintf(fp, "%s ",
	93	ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
	94	RTA_PAYLOAD(tb[NDA_LLADDR]),
	95	ll_index_to_type(r->ndm_ifindex),
	96	b1, sizeof(b1)));
d04bc300	97	}
38df7ac9	98
0849e60a SH	99	if (!filter_index && r->ndm_ifindex)
	100	fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex));
	101
	102	if (tb[NDA_DST]) {
	103	SPRINT_BUF(abuf);
	104	fprintf(fp, "dst %s ",
	105	format_host(AF_INET,
	106	RTA_PAYLOAD(tb[NDA_DST]),
	107	RTA_DATA(tb[NDA_DST]),
	108	abuf, sizeof(abuf)));
	109	}
38df7ac9	110
fd08839c VY	111	if (tb[NDA_VLAN]) {
	112	__u16 vid = rta_getattr_u16(tb[NDA_VLAN]);
	113	fprintf(fp, "vlan %hu ", vid);
	114	}
	115
d04bc300 SH	116	if (show_stats && tb[NDA_CACHEINFO]) {
d04bc300 SH	117	struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
0849e60a	118	int hz = get_user_hz();
d04bc300	119
0849e60a SH	120	fprintf(fp, " used %d/%d", ci->ndm_used/hz,
0849e60a SH	121	ci->ndm_updated/hz);
d04bc300	122	}
0849e60a SH	123	if (r->ndm_flags & NTF_SELF)
	124	fprintf(fp, "self ");
	125	if (r->ndm_flags & NTF_MASTER)
	126	fprintf(fp, "master ");
d04bc300	127
0849e60a	128	fprintf(fp, "%s\n", state_n2a(r->ndm_state));
d04bc300 SH	129	return 0;
	130	}
	131
	132	static int fdb_show(int argc, char **argv)
	133	{
	134	char *filter_dev = NULL;
0849e60a	135
d04bc300 SH	136	while (argc > 0) {
	137	if (strcmp(*argv, "dev") == 0) {
	138	NEXT_ARG();
	139	if (filter_dev)
	140	duparg("dev", *argv);
	141	filter_dev = *argv;
	142	}
	143	argc--; argv++;
	144	}
	145
	146	if (filter_dev) {
0849e60a SH	147	filter_index = if_nametoindex(filter_dev);
	148	if (filter_index == 0) {
	149	fprintf(stderr, "Cannot find device \"%s\"\n",
	150	filter_dev);
d04bc300 SH	151	return -1;
	152	}
	153	}
	154
	155	if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETNEIGH) < 0) {
	156	perror("Cannot send dump request");
	157	exit(1);
	158	}
d04bc300	159
0849e60a	160	if (rtnl_dump_filter(&rth, print_fdb, stdout) < 0) {
d04bc300 SH	161	fprintf(stderr, "Dump terminated\n");
	162	exit(1);
	163	}
	164
	165	return 0;
	166	}
	167
	168	static int fdb_modify(int cmd, int flags, int argc, char **argv)
	169	{
	170	struct {
	171	struct nlmsghdr n;
	172	struct ndmsg ndm;
	173	char buf[256];
	174	} req;
	175	char *addr = NULL;
	176	char *d = NULL;
	177	char abuf[ETH_ALEN];
0849e60a SH	178	int dst_ok = 0;
0849e60a SH	179	inet_prefix dst;
fd08839c	180	short vid = -1;
d04bc300 SH	181
	182	memset(&req, 0, sizeof(req));
	183
	184	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
	185	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	186	req.n.nlmsg_type = cmd;
	187	req.ndm.ndm_family = PF_BRIDGE;
	188	req.ndm.ndm_state = NUD_NOARP;
	189
	190	while (argc > 0) {
	191	if (strcmp(*argv, "dev") == 0) {
	192	NEXT_ARG();
	193	d = *argv;
0849e60a SH	194	} else if (strcmp(*argv, "dst") == 0) {
	195	NEXT_ARG();
	196	if (dst_ok)
	197	duparg2("dst", *argv);
	198	get_addr(&dst, *argv, preferred_family);
	199	dst_ok = 1;
dc6a6a25 JF	200	} else if (strcmp(*argv, "self") == 0) {
dc6a6a25 JF	201	req.ndm.ndm_flags \|= NTF_SELF;
0849e60a	202	} else if (matches(*argv, "master") == 0) {
dc6a6a25	203	req.ndm.ndm_flags \|= NTF_MASTER;
38df7ac9	204	} else if (matches(*argv, "local") == 0\|\|
0849e60a SH	205	matches(*argv, "permanent") == 0) {
	206	req.ndm.ndm_state \|= NUD_PERMANENT;
	207	} else if (matches(*argv, "temp") == 0) {
	208	req.ndm.ndm_state \|= NUD_REACHABLE;
fd08839c VY	209	} else if (matches(*argv, "vlan") == 0) {
	210	if (vid >= 0)
	211	duparg2("vlan", *argv);
	212	NEXT_ARG();
	213	vid = atoi(*argv);
d04bc300 SH	214	} else {
	215	if (strcmp(*argv, "to") == 0) {
	216	NEXT_ARG();
	217	}
0849e60a SH	218	if (matches(*argv, "help") == 0)
0849e60a SH	219	usage();
d04bc300 SH	220	if (addr)
	221	duparg2("to", *argv);
	222	addr = *argv;
	223	}
	224	argc--; argv++;
	225	}
	226
	227	if (d == NULL \|\| addr == NULL) {
	228	fprintf(stderr, "Device and address are required arguments.\n");
	229	exit(-1);
	230	}
	231
0849e60a SH	232	/* Assume self */
	233	if (!(req.ndm.ndm_flags&(NTF_SELF\|NTF_MASTER)))
	234	req.ndm.ndm_flags \|= NTF_SELF;
	235
	236	/* Assume permanent */
	237	if (!(req.ndm.ndm_state&(NUD_PERMANENT\|NUD_REACHABLE)))
	238	req.ndm.ndm_state \|= NUD_PERMANENT;
	239
	240	if (sscanf(addr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
d04bc300 SH	241	abuf, abuf+1, abuf+2,
	242	abuf+3, abuf+4, abuf+5) != 6) {
	243	fprintf(stderr, "Invalid mac address %s\n", addr);
	244	exit(-1);
	245	}
	246
	247	addattr_l(&req.n, sizeof(req), NDA_LLADDR, abuf, ETH_ALEN);
0849e60a SH	248	if (dst_ok)
0849e60a SH	249	addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen);
d04bc300	250
fd08839c	251	if (vid >= 0)
8ae66094	252	addattr16(&req.n, sizeof(req), NDA_VLAN, vid);
fd08839c	253
d04bc300 SH	254	req.ndm.ndm_ifindex = ll_name_to_index(d);
	255	if (req.ndm.ndm_ifindex == 0) {
	256	fprintf(stderr, "Cannot find device \"%s\"\n", d);
	257	return -1;
	258	}
	259
	260	if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
	261	exit(2);
	262
	263	return 0;
	264	}
	265
	266	int do_fdb(int argc, char **argv)
	267	{
	268	ll_init_map(&rth);
	269
	270	if (argc > 0) {
	271	if (matches(*argv, "add") == 0)
	272	return fdb_modify(RTM_NEWNEIGH, NLM_F_CREATE\|NLM_F_EXCL, argc-1, argv+1);
d04bc300 SH	273	if (matches(*argv, "delete") == 0)
	274	return fdb_modify(RTM_DELNEIGH, 0, argc-1, argv+1);
	275	if (matches(*argv, "show") == 0 \|\|
	276	matches(*argv, "lst") == 0 \|\|
	277	matches(*argv, "list") == 0)
	278	return fdb_show(argc-1, argv+1);
	279	if (matches(*argv, "help") == 0)
	280	usage();
	281	} else
	282	return fdb_show(0, NULL);
	283
083b46bb	284	fprintf(stderr, "Command \"%s\" is unknown, try \"bridge fdb help\".\n", *argv);
d04bc300 SH	285	exit(-1);
d04bc300 SH	286	}