[mirror_iproute2.git] / genl / ctrl.c

/*
 * ctrl.c	generic netlink controller
 *
 *		This program is free software; you can distribute 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:	J Hadi Salim (hadi@cyberus.ca)
 *		Johannes Berg (johannes@sipsolutions.net)
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>

#include "utils.h"
#include "genl_utils.h"

#define GENL_MAX_FAM_OPS	256
#define GENL_MAX_FAM_GRPS	256

static int usage(void)
{
	fprintf(stderr,"Usage: ctrl <CMD>\n" \
		       "CMD   := get <PARMS> | list | monitor\n" \
		       "PARMS := name <name> | id <id>\n" \
		       "Examples:\n" \
		       "\tctrl ls\n" \
		       "\tctrl monitor\n" \
		       "\tctrl get name foobar\n" \
		       "\tctrl get id 0xF\n");
	return -1;
}

static void print_ctrl_cmd_flags(FILE *fp, __u32 fl)
{
	fprintf(fp, "\n\t\tCapabilities (0x%x):\n ", fl);
	if (!fl) {
		fprintf(fp, "\n");
		return;
	}
	fprintf(fp, "\t\t ");

	if (fl & GENL_ADMIN_PERM)
		fprintf(fp, " requires admin permission;");
	if (fl & GENL_CMD_CAP_DO)
		fprintf(fp, " can doit;");
	if (fl & GENL_CMD_CAP_DUMP)
		fprintf(fp, " can dumpit;");
	if (fl & GENL_CMD_CAP_HASPOL)
		fprintf(fp, " has policy");

	fprintf(fp, "\n");
}

static int print_ctrl_cmds(FILE *fp, struct rtattr *arg, __u32 ctrl_ver)
{
	struct rtattr *tb[CTRL_ATTR_OP_MAX + 1];

	if (arg == NULL)
		return -1;

	parse_rtattr_nested(tb, CTRL_ATTR_OP_MAX, arg);
	if (tb[CTRL_ATTR_OP_ID]) {
		__u32 *id = RTA_DATA(tb[CTRL_ATTR_OP_ID]);
		fprintf(fp, " ID-0x%x ",*id);
	}
	/* we are only gonna do this for newer version of the controller */
	if (tb[CTRL_ATTR_OP_FLAGS] && ctrl_ver >= 0x2) {
		__u32 *fl = RTA_DATA(tb[CTRL_ATTR_OP_FLAGS]);
		print_ctrl_cmd_flags(fp, *fl);
	}
	return 0;

}

static int print_ctrl_grp(FILE *fp, struct rtattr *arg, __u32 ctrl_ver)
{
	struct rtattr *tb[CTRL_ATTR_MCAST_GRP_MAX + 1];

	if (arg == NULL)
		return -1;

	parse_rtattr_nested(tb, CTRL_ATTR_MCAST_GRP_MAX, arg);
	if (tb[2]) {
		__u32 *id = RTA_DATA(tb[CTRL_ATTR_MCAST_GRP_ID]);
		fprintf(fp, " ID-0x%x ",*id);
	}
	if (tb[1]) {
		char *name = RTA_DATA(tb[CTRL_ATTR_MCAST_GRP_NAME]);
		fprintf(fp, " name: %s ", name);
	}
	return 0;

}

/*
 * The controller sends one nlmsg per family
*/
static int print_ctrl(struct rtnl_ctrl_data *ctrl,
		      struct nlmsghdr *n, void *arg)
{
	struct rtattr *tb[CTRL_ATTR_MAX + 1];
	struct genlmsghdr *ghdr = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr *attrs;
	FILE *fp = (FILE *) arg;
	__u32 ctrl_v = 0x1;

	if (n->nlmsg_type !=  GENL_ID_CTRL) {
		fprintf(stderr, "Not a controller message, nlmsg_len=%d "
			"nlmsg_type=0x%x\n", n->nlmsg_len, n->nlmsg_type);
		return 0;
	}

	if (ghdr->cmd != CTRL_CMD_GETFAMILY &&
	    ghdr->cmd != CTRL_CMD_DELFAMILY &&
	    ghdr->cmd != CTRL_CMD_NEWFAMILY &&
	    ghdr->cmd != CTRL_CMD_NEWMCAST_GRP &&
	    ghdr->cmd != CTRL_CMD_DELMCAST_GRP) {
		fprintf(stderr, "Unknown controller command %d\n", ghdr->cmd);
		return 0;
	}

	len -= NLMSG_LENGTH(GENL_HDRLEN);

	if (len < 0) {
		fprintf(stderr, "wrong controller message len %d\n", len);
		return -1;
	}

	attrs = (struct rtattr *) ((char *) ghdr + GENL_HDRLEN);
	parse_rtattr(tb, CTRL_ATTR_MAX, attrs, len);

	if (tb[CTRL_ATTR_FAMILY_NAME]) {
		char *name = RTA_DATA(tb[CTRL_ATTR_FAMILY_NAME]);
		fprintf(fp, "\nName: %s\n",name);
	}
	if (tb[CTRL_ATTR_FAMILY_ID]) {
		__u16 *id = RTA_DATA(tb[CTRL_ATTR_FAMILY_ID]);
		fprintf(fp, "\tID: 0x%x ",*id);
	}
	if (tb[CTRL_ATTR_VERSION]) {
		__u32 *v = RTA_DATA(tb[CTRL_ATTR_VERSION]);
		fprintf(fp, " Version: 0x%x ",*v);
		ctrl_v = *v;
	}
	if (tb[CTRL_ATTR_HDRSIZE]) {
		__u32 *h = RTA_DATA(tb[CTRL_ATTR_HDRSIZE]);
		fprintf(fp, " header size: %d ",*h);
	}
	if (tb[CTRL_ATTR_MAXATTR]) {
		__u32 *ma = RTA_DATA(tb[CTRL_ATTR_MAXATTR]);
		fprintf(fp, " max attribs: %d ",*ma);
	}
	/* end of family definitions .. */
	fprintf(fp,"\n");
	if (tb[CTRL_ATTR_OPS]) {
		struct rtattr *tb2[GENL_MAX_FAM_OPS];
		int i=0;
		parse_rtattr_nested(tb2, GENL_MAX_FAM_OPS, tb[CTRL_ATTR_OPS]);
		fprintf(fp, "\tcommands supported: \n");
		for (i = 0; i < GENL_MAX_FAM_OPS; i++) {
			if (tb2[i]) {
				fprintf(fp, "\t\t#%d: ", i);
				if (0 > print_ctrl_cmds(fp, tb2[i], ctrl_v)) {
					fprintf(fp, "Error printing command\n");
				}
				/* for next command */
				fprintf(fp,"\n");
			}
		}

		/* end of family::cmds definitions .. */
		fprintf(fp,"\n");
	}

	if (tb[CTRL_ATTR_MCAST_GROUPS]) {
		struct rtattr *tb2[GENL_MAX_FAM_GRPS + 1];
		int i;

		parse_rtattr_nested(tb2, GENL_MAX_FAM_GRPS,
				    tb[CTRL_ATTR_MCAST_GROUPS]);
		fprintf(fp, "\tmulticast groups:\n");

		for (i = 0; i < GENL_MAX_FAM_GRPS; i++) {
			if (tb2[i]) {
				fprintf(fp, "\t\t#%d: ", i);
				if (0 > print_ctrl_grp(fp, tb2[i], ctrl_v))
					fprintf(fp, "Error printing group\n");
				/* for next group */
				fprintf(fp,"\n");
			}
		}

		/* end of family::groups definitions .. */
		fprintf(fp,"\n");
	}

	fflush(fp);
	return 0;
}

static int print_ctrl2(struct nlmsghdr *n, void *arg)
{
	return print_ctrl(NULL, n, arg);
}

static int ctrl_list(int cmd, int argc, char **argv)
{
	struct rtnl_handle rth;
	int ret = -1;
	char d[GENL_NAMSIZ];
	struct {
		struct nlmsghdr         n;
		struct genlmsghdr	g;
		char                    buf[4096];
	} req = {
		.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN),
		.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK,
		.n.nlmsg_type = GENL_ID_CTRL,
		.g.cmd = CTRL_CMD_GETFAMILY,
	};
	struct nlmsghdr *nlh = &req.n;
	struct nlmsghdr *answer = NULL;

	if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0) {
		fprintf(stderr, "Cannot open generic netlink socket\n");
		exit(1);
	}

	if (cmd == CTRL_CMD_GETFAMILY) {
		if (argc != 2) {
			fprintf(stderr, "Wrong number of params\n");
			return -1;
		}

		if (matches(*argv, "name") == 0) {
			NEXT_ARG();
			strlcpy(d, *argv, sizeof(d));
			addattr_l(nlh, 128, CTRL_ATTR_FAMILY_NAME,
				  d, strlen(d) + 1);
		} else if (matches(*argv, "id") == 0) {
			__u16 id;
			NEXT_ARG();
			if (get_u16(&id, *argv, 0)) {
				fprintf(stderr, "Illegal \"id\"\n");
				goto ctrl_done;
			}

			addattr_l(nlh, 128, CTRL_ATTR_FAMILY_ID, &id, 2);

		} else {
			fprintf(stderr, "Wrong params\n");
			goto ctrl_done;
		}

		if (rtnl_talk(&rth, nlh, &answer) < 0) {
			fprintf(stderr, "Error talking to the kernel\n");
			goto ctrl_done;
		}

		if (print_ctrl2(answer, (void *) stdout) < 0) {
			fprintf(stderr, "Dump terminated\n");
			goto ctrl_done;
		}

	}

	if (cmd == CTRL_CMD_UNSPEC) {
		nlh->nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
		nlh->nlmsg_seq = rth.dump = ++rth.seq;

		if (rtnl_send(&rth, nlh, nlh->nlmsg_len) < 0) {
			perror("Failed to send dump request\n");
			goto ctrl_done;
		}

		rtnl_dump_filter(&rth, print_ctrl2, stdout);

        }

	ret = 0;
ctrl_done:
	free(answer);
	rtnl_close(&rth);
	return ret;
}

static int ctrl_listen(int argc, char **argv)
{
	struct rtnl_handle rth;

	if (rtnl_open_byproto(&rth, nl_mgrp(GENL_ID_CTRL), NETLINK_GENERIC) < 0) {
		fprintf(stderr, "Canot open generic netlink socket\n");
		return -1;
	}

	if (rtnl_listen(&rth, print_ctrl, (void *) stdout) < 0)
		return -1;

	return 0;
}

static int parse_ctrl(struct genl_util *a, int argc, char **argv)
{
	argv++;
	if (--argc <= 0) {
		fprintf(stderr, "wrong controller params\n");
		return -1;
	}

	if (matches(*argv, "monitor") == 0)
		return ctrl_listen(argc-1, argv+1);
	if (matches(*argv, "get") == 0)
		return ctrl_list(CTRL_CMD_GETFAMILY, argc-1, argv+1);
	if (matches(*argv, "list") == 0 ||
	    matches(*argv, "show") == 0 ||
	    matches(*argv, "lst") == 0)
		return ctrl_list(CTRL_CMD_UNSPEC, argc-1, argv+1);
	if (matches(*argv, "help") == 0)
		return usage();

	fprintf(stderr, "ctrl command \"%s\" is unknown, try \"ctrl help\".\n",
		*argv);

	return -1;
}

struct genl_util ctrl_genl_util = {
	.name = "ctrl",
	.parse_genlopt = parse_ctrl,
	.print_genlopt = print_ctrl2,
};
Commit	Line	Data
65018ae4 JHS	1	/*
	2	* ctrl.c generic netlink controller
	3	*
	4	* This program is free software; you can distribute 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	*
80c05b09 JB	9	* Authors: J Hadi Salim (hadi@cyberus.ca)
80c05b09 JB	10	* Johannes Berg (johannes@sipsolutions.net)
65018ae4 JHS	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
65018ae4 JHS	16	#include <fcntl.h>
	17	#include <sys/socket.h>
	18	#include <netinet/in.h>
	19	#include <arpa/inet.h>
	20	#include <string.h>
	21
	22	#include "utils.h"
	23	#include "genl_utils.h"
	24
26328fc3	25	#define GENL_MAX_FAM_OPS 256
80c05b09 JB	26	#define GENL_MAX_FAM_GRPS 256
80c05b09 JB	27
65018ae4 JHS	28	static int usage(void)
	29	{
	30	fprintf(stderr,"Usage: ctrl <CMD>\n" \
	31	"CMD := get <PARMS> \| list \| monitor\n" \
	32	"PARMS := name <name> \| id <id>\n" \
	33	"Examples:\n" \
	34	"\tctrl ls\n" \
	35	"\tctrl monitor\n" \
	36	"\tctrl get name foobar\n" \
	37	"\tctrl get id 0xF\n");
	38	return -1;
	39	}
	40
d1f28cf1	41	static void print_ctrl_cmd_flags(FILE *fp, __u32 fl)
26328fc3	42	{
	43	fprintf(fp, "\n\t\tCapabilities (0x%x):\n ", fl);
	44	if (!fl) {
	45	fprintf(fp, "\n");
	46	return;
	47	}
	48	fprintf(fp, "\t\t ");
	49
	50	if (fl & GENL_ADMIN_PERM)
	51	fprintf(fp, " requires admin permission;");
	52	if (fl & GENL_CMD_CAP_DO)
	53	fprintf(fp, " can doit;");
	54	if (fl & GENL_CMD_CAP_DUMP)
	55	fprintf(fp, " can dumpit;");
	56	if (fl & GENL_CMD_CAP_HASPOL)
	57	fprintf(fp, " has policy");
	58
	59	fprintf(fp, "\n");
	60	}
e9e9365b	61
26328fc3	62	static int print_ctrl_cmds(FILE fp, struct rtattr arg, __u32 ctrl_ver)
	63	{
	64	struct rtattr *tb[CTRL_ATTR_OP_MAX + 1];
	65
	66	if (arg == NULL)
	67	return -1;
	68
	69	parse_rtattr_nested(tb, CTRL_ATTR_OP_MAX, arg);
	70	if (tb[CTRL_ATTR_OP_ID]) {
	71	__u32 *id = RTA_DATA(tb[CTRL_ATTR_OP_ID]);
	72	fprintf(fp, " ID-0x%x ",*id);
	73	}
	74	/* we are only gonna do this for newer version of the controller */
	75	if (tb[CTRL_ATTR_OP_FLAGS] && ctrl_ver >= 0x2) {
	76	__u32 *fl = RTA_DATA(tb[CTRL_ATTR_OP_FLAGS]);
	77	print_ctrl_cmd_flags(fp, *fl);
	78	}
	79	return 0;
	80
	81	}
	82
80c05b09 JB	83	static int print_ctrl_grp(FILE fp, struct rtattr arg, __u32 ctrl_ver)
	84	{
	85	struct rtattr *tb[CTRL_ATTR_MCAST_GRP_MAX + 1];
	86
	87	if (arg == NULL)
	88	return -1;
	89
	90	parse_rtattr_nested(tb, CTRL_ATTR_MCAST_GRP_MAX, arg);
	91	if (tb[2]) {
	92	__u32 *id = RTA_DATA(tb[CTRL_ATTR_MCAST_GRP_ID]);
	93	fprintf(fp, " ID-0x%x ",*id);
	94	}
	95	if (tb[1]) {
	96	char *name = RTA_DATA(tb[CTRL_ATTR_MCAST_GRP_NAME]);
	97	fprintf(fp, " name: %s ", name);
	98	}
	99	return 0;
	100
	101	}
	102
26328fc3	103	/*
	104	* The controller sends one nlmsg per family
	105	*/
cd554f2c	106	static int print_ctrl(struct rtnl_ctrl_data *ctrl,
0628cddd	107	struct nlmsghdr n, void arg)
65018ae4 JHS	108	{
	109	struct rtattr *tb[CTRL_ATTR_MAX + 1];
	110	struct genlmsghdr *ghdr = NLMSG_DATA(n);
	111	int len = n->nlmsg_len;
	112	struct rtattr *attrs;
	113	FILE fp = (FILE ) arg;
81c61790	114	__u32 ctrl_v = 0x1;
65018ae4 JHS	115
	116	if (n->nlmsg_type != GENL_ID_CTRL) {
	117	fprintf(stderr, "Not a controller message, nlmsg_len=%d "
	118	"nlmsg_type=0x%x\n", n->nlmsg_len, n->nlmsg_type);
	119	return 0;
	120	}
	121
	122	if (ghdr->cmd != CTRL_CMD_GETFAMILY &&
	123	ghdr->cmd != CTRL_CMD_DELFAMILY &&
80c05b09 JB	124	ghdr->cmd != CTRL_CMD_NEWFAMILY &&
	125	ghdr->cmd != CTRL_CMD_NEWMCAST_GRP &&
	126	ghdr->cmd != CTRL_CMD_DELMCAST_GRP) {
	127	fprintf(stderr, "Unknown controller command %d\n", ghdr->cmd);
65018ae4 JHS	128	return 0;
	129	}
	130
	131	len -= NLMSG_LENGTH(GENL_HDRLEN);
	132
	133	if (len < 0) {
	134	fprintf(stderr, "wrong controller message len %d\n", len);
	135	return -1;
	136	}
	137
	138	attrs = (struct rtattr ) ((char ) ghdr + GENL_HDRLEN);
	139	parse_rtattr(tb, CTRL_ATTR_MAX, attrs, len);
	140
	141	if (tb[CTRL_ATTR_FAMILY_NAME]) {
	142	char *name = RTA_DATA(tb[CTRL_ATTR_FAMILY_NAME]);
26328fc3	143	fprintf(fp, "\nName: %s\n",name);
65018ae4 JHS	144	}
	145	if (tb[CTRL_ATTR_FAMILY_ID]) {
	146	__u16 *id = RTA_DATA(tb[CTRL_ATTR_FAMILY_ID]);
26328fc3	147	fprintf(fp, "\tID: 0x%x ",*id);
	148	}
	149	if (tb[CTRL_ATTR_VERSION]) {
	150	__u32 *v = RTA_DATA(tb[CTRL_ATTR_VERSION]);
	151	fprintf(fp, " Version: 0x%x ",*v);
	152	ctrl_v = *v;
65018ae4	153	}
26328fc3	154	if (tb[CTRL_ATTR_HDRSIZE]) {
	155	__u32 *h = RTA_DATA(tb[CTRL_ATTR_HDRSIZE]);
	156	fprintf(fp, " header size: %d ",*h);
	157	}
	158	if (tb[CTRL_ATTR_MAXATTR]) {
	159	__u32 *ma = RTA_DATA(tb[CTRL_ATTR_MAXATTR]);
	160	fprintf(fp, " max attribs: %d ",*ma);
	161	}
	162	/* end of family definitions .. */
	163	fprintf(fp,"\n");
	164	if (tb[CTRL_ATTR_OPS]) {
	165	struct rtattr *tb2[GENL_MAX_FAM_OPS];
	166	int i=0;
	167	parse_rtattr_nested(tb2, GENL_MAX_FAM_OPS, tb[CTRL_ATTR_OPS]);
	168	fprintf(fp, "\tcommands supported: \n");
	169	for (i = 0; i < GENL_MAX_FAM_OPS; i++) {
	170	if (tb2[i]) {
	171	fprintf(fp, "\t\t#%d: ", i);
	172	if (0 > print_ctrl_cmds(fp, tb2[i], ctrl_v)) {
	173	fprintf(fp, "Error printing command\n");
	174	}
	175	/* for next command */
	176	fprintf(fp,"\n");
	177	}
	178	}
65018ae4	179
26328fc3	180	/* end of family::cmds definitions .. */
	181	fprintf(fp,"\n");
	182	}
80c05b09 JB	183
	184	if (tb[CTRL_ATTR_MCAST_GROUPS]) {
	185	struct rtattr *tb2[GENL_MAX_FAM_GRPS + 1];
	186	int i;
	187
	188	parse_rtattr_nested(tb2, GENL_MAX_FAM_GRPS,
	189	tb[CTRL_ATTR_MCAST_GROUPS]);
	190	fprintf(fp, "\tmulticast groups:\n");
	191
	192	for (i = 0; i < GENL_MAX_FAM_GRPS; i++) {
	193	if (tb2[i]) {
	194	fprintf(fp, "\t\t#%d: ", i);
	195	if (0 > print_ctrl_grp(fp, tb2[i], ctrl_v))
	196	fprintf(fp, "Error printing group\n");
	197	/* for next group */
	198	fprintf(fp,"\n");
	199	}
	200	}
	201
	202	/* end of family::groups definitions .. */
	203	fprintf(fp,"\n");
	204	}
	205
65018ae4 JHS	206	fflush(fp);
	207	return 0;
	208	}
	209
cd554f2c	210	static int print_ctrl2(struct nlmsghdr n, void arg)
0628cddd	211	{
cd554f2c	212	return print_ctrl(NULL, n, arg);
0628cddd ND	213	}
0628cddd ND	214
65018ae4 JHS	215	static int ctrl_list(int cmd, int argc, char **argv)
	216	{
	217	struct rtnl_handle rth;
65018ae4 JHS	218	int ret = -1;
	219	char d[GENL_NAMSIZ];
	220	struct {
	221	struct nlmsghdr n;
d17b136f	222	struct genlmsghdr g;
65018ae4	223	char buf[4096];
d17b136f PS	224	} req = {
	225	.n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN),
	226	.n.nlmsg_flags = NLM_F_REQUEST \| NLM_F_ACK,
	227	.n.nlmsg_type = GENL_ID_CTRL,
	228	.g.cmd = CTRL_CMD_GETFAMILY,
	229	};
	230	struct nlmsghdr *nlh = &req.n;
86bf43c7	231	struct nlmsghdr *answer = NULL;
65018ae4 JHS	232
	233	if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0) {
	234	fprintf(stderr, "Cannot open generic netlink socket\n");
	235	exit(1);
	236	}
	237
	238	if (cmd == CTRL_CMD_GETFAMILY) {
	239	if (argc != 2) {
	240	fprintf(stderr, "Wrong number of params\n");
	241	return -1;
	242	}
	243
	244	if (matches(*argv, "name") == 0) {
	245	NEXT_ARG();
532b8874	246	strlcpy(d, *argv, sizeof(d));
65018ae4 JHS	247	addattr_l(nlh, 128, CTRL_ATTR_FAMILY_NAME,
	248	d, strlen(d) + 1);
	249	} else if (matches(*argv, "id") == 0) {
	250	__u16 id;
	251	NEXT_ARG();
	252	if (get_u16(&id, *argv, 0)) {
	253	fprintf(stderr, "Illegal \"id\"\n");
	254	goto ctrl_done;
	255	}
	256
	257	addattr_l(nlh, 128, CTRL_ATTR_FAMILY_ID, &id, 2);
	258
	259	} else {
	260	fprintf(stderr, "Wrong params\n");
	261	goto ctrl_done;
	262	}
	263
86bf43c7	264	if (rtnl_talk(&rth, nlh, &answer) < 0) {
65018ae4 JHS	265	fprintf(stderr, "Error talking to the kernel\n");
	266	goto ctrl_done;
	267	}
	268
cd554f2c	269	if (print_ctrl2(answer, (void *) stdout) < 0) {
65018ae4 JHS	270	fprintf(stderr, "Dump terminated\n");
	271	goto ctrl_done;
	272	}
	273
	274	}
	275
	276	if (cmd == CTRL_CMD_UNSPEC) {
	277	nlh->nlmsg_flags = NLM_F_ROOT\|NLM_F_MATCH\|NLM_F_REQUEST;
	278	nlh->nlmsg_seq = rth.dump = ++rth.seq;
	279
6cf8398f	280	if (rtnl_send(&rth, nlh, nlh->nlmsg_len) < 0) {
65018ae4 JHS	281	perror("Failed to send dump request\n");
	282	goto ctrl_done;
	283	}
	284
0628cddd	285	rtnl_dump_filter(&rth, print_ctrl2, stdout);
65018ae4 JHS	286
	287	}
	288
	289	ret = 0;
	290	ctrl_done:
86bf43c7	291	free(answer);
65018ae4 JHS	292	rtnl_close(&rth);
	293	return ret;
	294	}
	295
	296	static int ctrl_listen(int argc, char **argv)
	297	{
	298	struct rtnl_handle rth;
	299
	300	if (rtnl_open_byproto(&rth, nl_mgrp(GENL_ID_CTRL), NETLINK_GENERIC) < 0) {
	301	fprintf(stderr, "Canot open generic netlink socket\n");
	302	return -1;
	303	}
	304
	305	if (rtnl_listen(&rth, print_ctrl, (void *) stdout) < 0)
	306	return -1;
	307
	308	return 0;
	309	}
	310
	311	static int parse_ctrl(struct genl_util a, int argc, char *argv)
	312	{
	313	argv++;
	314	if (--argc <= 0) {
	315	fprintf(stderr, "wrong controller params\n");
	316	return -1;
	317	}
	318
	319	if (matches(*argv, "monitor") == 0)
	320	return ctrl_listen(argc-1, argv+1);
	321	if (matches(*argv, "get") == 0)
	322	return ctrl_list(CTRL_CMD_GETFAMILY, argc-1, argv+1);
	323	if (matches(*argv, "list") == 0 \|\|
	324	matches(*argv, "show") == 0 \|\|
	325	matches(*argv, "lst") == 0)
	326	return ctrl_list(CTRL_CMD_UNSPEC, argc-1, argv+1);
	327	if (matches(*argv, "help") == 0)
	328	return usage();
	329
3669d218	330	fprintf(stderr, "ctrl command \"%s\" is unknown, try \"ctrl help\".\n",
65018ae4 JHS	331	*argv);
	332
	333	return -1;
	334	}
	335
	336	struct genl_util ctrl_genl_util = {
	337	.name = "ctrl",
	338	.parse_genlopt = parse_ctrl,
0628cddd	339	.print_genlopt = print_ctrl2,
65018ae4	340	};