[mirror_iproute2.git] / bridge / link.c

/* SPDX-License-Identifier: GPL-2.0 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_bridge.h>
#include <string.h>
#include <stdbool.h>

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

static unsigned int filter_index;

static const char *port_states[] = {
	[BR_STATE_DISABLED] = "disabled",
	[BR_STATE_LISTENING] = "listening",
	[BR_STATE_LEARNING] = "learning",
	[BR_STATE_FORWARDING] = "forwarding",
	[BR_STATE_BLOCKING] = "blocking",
};

static const char *hw_mode[] = {
	"VEB", "VEPA"
};

static void print_link_flags(FILE *fp, unsigned int flags, unsigned int mdown)
{
	open_json_array(PRINT_ANY, is_json_context() ? "flags" : "<");
	if (flags & IFF_UP && !(flags & IFF_RUNNING))
		print_string(PRINT_ANY, NULL,
			     flags ? "%s," : "%s", "NO-CARRIER");
	flags &= ~IFF_RUNNING;

#define _PF(f) if (flags&IFF_##f) {					\
		flags &= ~IFF_##f ;					\
		print_string(PRINT_ANY, NULL, flags ? "%s," : "%s", #f); }
	_PF(LOOPBACK);
	_PF(BROADCAST);
	_PF(POINTOPOINT);
	_PF(MULTICAST);
	_PF(NOARP);
	_PF(ALLMULTI);
	_PF(PROMISC);
	_PF(MASTER);
	_PF(SLAVE);
	_PF(DEBUG);
	_PF(DYNAMIC);
	_PF(AUTOMEDIA);
	_PF(PORTSEL);
	_PF(NOTRAILERS);
	_PF(UP);
	_PF(LOWER_UP);
	_PF(DORMANT);
	_PF(ECHO);
#undef _PF
	if (flags)
		print_hex(PRINT_ANY, NULL, "%x", flags);
	if (mdown)
		print_string(PRINT_ANY, NULL, ",%s", "M-DOWN");
	close_json_array(PRINT_ANY, "> ");
}

static void print_portstate(__u8 state)
{
	if (state <= BR_STATE_BLOCKING)
		print_string(PRINT_ANY, "state",
			     "state %s ", port_states[state]);
	else
		print_uint(PRINT_ANY, "state",
			     "state (%d) ", state);
}

static void print_onoff(FILE *fp, const char *flag, __u8 val)
{
	if (is_json_context())
		print_bool(PRINT_JSON, flag, NULL, val);
	else
		fprintf(fp, "%s %s ", flag, val ? "on" : "off");
}

static void print_hwmode(__u16 mode)
{
	if (mode >= ARRAY_SIZE(hw_mode))
		print_0xhex(PRINT_ANY, "hwmode",
			    "hwmode %#llx ", mode);
	else
		print_string(PRINT_ANY, "hwmode",
			     "hwmode %s ", hw_mode[mode]);
}

static void print_protinfo(FILE *fp, struct rtattr *attr)
{
	if (attr->rta_type & NLA_F_NESTED) {
		struct rtattr *prtb[IFLA_BRPORT_MAX + 1];

		parse_rtattr_nested(prtb, IFLA_BRPORT_MAX, attr);

		if (prtb[IFLA_BRPORT_STATE])
			print_portstate(rta_getattr_u8(prtb[IFLA_BRPORT_STATE]));

		if (prtb[IFLA_BRPORT_PRIORITY])
			print_uint(PRINT_ANY, "priority",
				   "priority %u ",
				   rta_getattr_u16(prtb[IFLA_BRPORT_PRIORITY]));

		if (prtb[IFLA_BRPORT_COST])
			print_uint(PRINT_ANY, "cost",
				   "cost %u ",
				   rta_getattr_u32(prtb[IFLA_BRPORT_COST]));

		if (!show_details)
			return;

		if (!is_json_context())
			fprintf(fp, "%s    ", _SL_);

		if (prtb[IFLA_BRPORT_MODE])
			print_onoff(fp, "hairpin",
				    rta_getattr_u8(prtb[IFLA_BRPORT_MODE]));
		if (prtb[IFLA_BRPORT_GUARD])
			print_onoff(fp, "guard",
				    rta_getattr_u8(prtb[IFLA_BRPORT_GUARD]));
		if (prtb[IFLA_BRPORT_PROTECT])
			print_onoff(fp, "root_block",
				    rta_getattr_u8(prtb[IFLA_BRPORT_PROTECT]));
		if (prtb[IFLA_BRPORT_FAST_LEAVE])
			print_onoff(fp, "fastleave",
				    rta_getattr_u8(prtb[IFLA_BRPORT_FAST_LEAVE]));
		if (prtb[IFLA_BRPORT_LEARNING])
			print_onoff(fp, "learning",
				    rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING]));
		if (prtb[IFLA_BRPORT_LEARNING_SYNC])
			print_onoff(fp, "learning_sync",
				    rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING_SYNC]));
		if (prtb[IFLA_BRPORT_UNICAST_FLOOD])
			print_onoff(fp, "flood",
				    rta_getattr_u8(prtb[IFLA_BRPORT_UNICAST_FLOOD]));
		if (prtb[IFLA_BRPORT_MCAST_FLOOD])
			print_onoff(fp, "mcast_flood",
				    rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_FLOOD]));
		if (prtb[IFLA_BRPORT_MCAST_TO_UCAST])
			print_onoff(fp, "mcast_to_unicast",
				    rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_TO_UCAST]));
		if (prtb[IFLA_BRPORT_NEIGH_SUPPRESS])
			print_onoff(fp, "neigh_suppress",
				    rta_getattr_u8(prtb[IFLA_BRPORT_NEIGH_SUPPRESS]));
		if (prtb[IFLA_BRPORT_VLAN_TUNNEL])
			print_onoff(fp, "vlan_tunnel",
				    rta_getattr_u8(prtb[IFLA_BRPORT_VLAN_TUNNEL]));

		if (prtb[IFLA_BRPORT_BACKUP_PORT]) {
			int ifidx;

			ifidx = rta_getattr_u32(prtb[IFLA_BRPORT_BACKUP_PORT]);
			print_string(PRINT_ANY,
				     "backup_port", "backup_port %s ",
				     ll_index_to_name(ifidx));
		}

		if (prtb[IFLA_BRPORT_ISOLATED])
			print_onoff(fp, "isolated",
				    rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED]));
	} else
		print_portstate(rta_getattr_u8(attr));
}


/*
 * This is reported by HW devices that have some bridging
 * capabilities.
 */
static void print_af_spec(struct rtattr *attr, int ifindex)
{
	struct rtattr *aftb[IFLA_BRIDGE_MAX+1];

	parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, attr);

	if (aftb[IFLA_BRIDGE_MODE])
		print_hwmode(rta_getattr_u16(aftb[IFLA_BRIDGE_MODE]));

	if (!show_details)
		return;

	if (aftb[IFLA_BRIDGE_VLAN_INFO])
		print_vlan_info(aftb[IFLA_BRIDGE_VLAN_INFO], ifindex);
}

int print_linkinfo(struct nlmsghdr *n, void *arg)
{
	FILE *fp = arg;
	struct ifinfomsg *ifi = NLMSG_DATA(n);
	struct rtattr *tb[IFLA_MAX+1];
	unsigned int m_flag = 0;
	int len = n->nlmsg_len;
	const char *name;

	len -= NLMSG_LENGTH(sizeof(*ifi));
	if (len < 0) {
		fprintf(stderr, "Message too short!\n");
		return -1;
	}

	if (!(ifi->ifi_family == AF_BRIDGE || ifi->ifi_family == AF_UNSPEC))
		return 0;

	if (filter_index && filter_index != ifi->ifi_index)
		return 0;

	parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED);

	name = get_ifname_rta(ifi->ifi_index, tb[IFLA_IFNAME]);
	if (!name)
		return -1;

	open_json_object(NULL);
	if (n->nlmsg_type == RTM_DELLINK)
		print_bool(PRINT_ANY, "deleted", "Deleted ", true);

	print_int(PRINT_ANY, "ifindex", "%d: ", ifi->ifi_index);
	m_flag = print_name_and_link("%s: ", name, tb);
	print_link_flags(fp, ifi->ifi_flags, m_flag);

	if (tb[IFLA_MTU])
		print_int(PRINT_ANY,
			  "mtu", "mtu %u ",
			  rta_getattr_u32(tb[IFLA_MTU]));

	if (tb[IFLA_MASTER]) {
		int master = rta_getattr_u32(tb[IFLA_MASTER]);

		print_string(PRINT_ANY, "master", "master %s ",
			     ll_index_to_name(master));
	}

	if (tb[IFLA_PROTINFO])
		print_protinfo(fp, tb[IFLA_PROTINFO]);

	if (tb[IFLA_AF_SPEC])
		print_af_spec(tb[IFLA_AF_SPEC], ifi->ifi_index);

	print_string(PRINT_FP, NULL, "%s", "\n");
	close_json_object();
	fflush(fp);
	return 0;
}

static void usage(void)
{
	fprintf(stderr, "Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n");
	fprintf(stderr, "                               [ guard {on | off} ]\n");
	fprintf(stderr, "                               [ hairpin {on | off} ]\n");
	fprintf(stderr, "                               [ fastleave {on | off} ]\n");
	fprintf(stderr,	"                               [ root_block {on | off} ]\n");
	fprintf(stderr,	"                               [ learning {on | off} ]\n");
	fprintf(stderr,	"                               [ learning_sync {on | off} ]\n");
	fprintf(stderr,	"                               [ flood {on | off} ]\n");
	fprintf(stderr,	"                               [ mcast_flood {on | off} ]\n");
	fprintf(stderr,	"                               [ mcast_to_unicast {on | off} ]\n");
	fprintf(stderr,	"                               [ neigh_suppress {on | off} ]\n");
	fprintf(stderr,	"                               [ vlan_tunnel {on | off} ]\n");
	fprintf(stderr,	"                               [ isolated {on | off} ]\n");
	fprintf(stderr, "                               [ hwmode {vepa | veb} ]\n");
	fprintf(stderr,	"                               [ backup_port DEVICE ] [ nobackup_port ]\n");
	fprintf(stderr, "                               [ self ] [ master ]\n");
	fprintf(stderr, "       bridge link show [dev DEV]\n");
	exit(-1);
}

static bool on_off(char *arg, __s8 *attr, char *val)
{
	if (strcmp(val, "on") == 0)
		*attr = 1;
	else if (strcmp(val, "off") == 0)
		*attr = 0;
	else {
		fprintf(stderr,
			"Error: argument of \"%s\" must be \"on\" or \"off\"\n",
			arg);
		return false;
	}

	return true;
}

static int brlink_modify(int argc, char **argv)
{
	struct {
		struct nlmsghdr  n;
		struct ifinfomsg ifm;
		char             buf[512];
	} req = {
		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
		.n.nlmsg_flags = NLM_F_REQUEST,
		.n.nlmsg_type = RTM_SETLINK,
		.ifm.ifi_family = PF_BRIDGE,
	};
	char *d = NULL;
	int backup_port_idx = -1;
	__s8 neigh_suppress = -1;
	__s8 learning = -1;
	__s8 learning_sync = -1;
	__s8 flood = -1;
	__s8 vlan_tunnel = -1;
	__s8 mcast_flood = -1;
	__s8 mcast_to_unicast = -1;
	__s8 isolated = -1;
	__s8 hairpin = -1;
	__s8 bpdu_guard = -1;
	__s8 fast_leave = -1;
	__s8 root_block = -1;
	__u32 cost = 0;
	__s16 priority = -1;
	__s8 state = -1;
	__s16 mode = -1;
	__u16 flags = 0;
	struct rtattr *nest;

	while (argc > 0) {
		if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			d = *argv;
		} else if (strcmp(*argv, "guard") == 0) {
			NEXT_ARG();
			if (!on_off("guard", &bpdu_guard, *argv))
				return -1;
		} else if (strcmp(*argv, "hairpin") == 0) {
			NEXT_ARG();
			if (!on_off("hairpin", &hairpin, *argv))
				return -1;
		} else if (strcmp(*argv, "fastleave") == 0) {
			NEXT_ARG();
			if (!on_off("fastleave", &fast_leave, *argv))
				return -1;
		} else if (strcmp(*argv, "root_block") == 0) {
			NEXT_ARG();
			if (!on_off("root_block", &root_block, *argv))
				return -1;
		} else if (strcmp(*argv, "learning") == 0) {
			NEXT_ARG();
			if (!on_off("learning", &learning, *argv))
				return -1;
		} else if (strcmp(*argv, "learning_sync") == 0) {
			NEXT_ARG();
			if (!on_off("learning_sync", &learning_sync, *argv))
				return -1;
		} else if (strcmp(*argv, "flood") == 0) {
			NEXT_ARG();
			if (!on_off("flood", &flood, *argv))
				return -1;
		} else if (strcmp(*argv, "mcast_flood") == 0) {
			NEXT_ARG();
			if (!on_off("mcast_flood", &mcast_flood, *argv))
				return -1;
		} else if (strcmp(*argv, "mcast_to_unicast") == 0) {
			NEXT_ARG();
			if (!on_off("mcast_to_unicast", &mcast_to_unicast, *argv))
				return -1;
		} else if (strcmp(*argv, "cost") == 0) {
			NEXT_ARG();
			cost = atoi(*argv);
		} else if (strcmp(*argv, "priority") == 0) {
			NEXT_ARG();
			priority = atoi(*argv);
		} else if (strcmp(*argv, "state") == 0) {
			NEXT_ARG();
			char *endptr;
			size_t nstates = ARRAY_SIZE(port_states);

			state = strtol(*argv, &endptr, 10);
			if (!(**argv != '\0' && *endptr == '\0')) {
				for (state = 0; state < nstates; state++)
					if (strcmp(port_states[state], *argv) == 0)
						break;
				if (state == nstates) {
					fprintf(stderr,
						"Error: invalid STP port state\n");
					return -1;
				}
			}
		} else if (strcmp(*argv, "hwmode") == 0) {
			NEXT_ARG();
			flags = BRIDGE_FLAGS_SELF;
			if (strcmp(*argv, "vepa") == 0)
				mode = BRIDGE_MODE_VEPA;
			else if (strcmp(*argv, "veb") == 0)
				mode = BRIDGE_MODE_VEB;
			else {
				fprintf(stderr,
					"Mode argument must be \"vepa\" or \"veb\".\n");
				return -1;
			}
		} else if (strcmp(*argv, "self") == 0) {
			flags |= BRIDGE_FLAGS_SELF;
		} else if (strcmp(*argv, "master") == 0) {
			flags |= BRIDGE_FLAGS_MASTER;
		} else if (strcmp(*argv, "neigh_suppress") == 0) {
			NEXT_ARG();
			if (!on_off("neigh_suppress", &neigh_suppress,
				    *argv))
				return -1;
		} else if (strcmp(*argv, "vlan_tunnel") == 0) {
			NEXT_ARG();
			if (!on_off("vlan_tunnel", &vlan_tunnel,
				    *argv))
				return -1;
		} else if (strcmp(*argv, "isolated") == 0) {
			NEXT_ARG();
			if (!on_off("isolated", &isolated, *argv))
				return -1;
		} else if (strcmp(*argv, "backup_port") == 0) {
			NEXT_ARG();
			backup_port_idx = ll_name_to_index(*argv);
			if (!backup_port_idx) {
				fprintf(stderr, "Error: device %s does not exist\n",
					*argv);
				return -1;
			}
		} else if (strcmp(*argv, "nobackup_port") == 0) {
			backup_port_idx = 0;
		} else {
			usage();
		}
		argc--; argv++;
	}
	if (d == NULL) {
		fprintf(stderr, "Device is a required argument.\n");
		return -1;
	}


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

	/* Nested PROTINFO attribute.  Contains: port flags, cost, priority and
	 * state.
	 */
	nest = addattr_nest(&req.n, sizeof(req),
			    IFLA_PROTINFO | NLA_F_NESTED);
	/* Flags first */
	if (bpdu_guard >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_GUARD, bpdu_guard);
	if (hairpin >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_MODE, hairpin);
	if (fast_leave >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_FAST_LEAVE,
			 fast_leave);
	if (root_block >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_PROTECT, root_block);
	if (flood >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood);
	if (mcast_flood >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_FLOOD,
			 mcast_flood);
	if (mcast_to_unicast >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_TO_UCAST,
			 mcast_to_unicast);
	if (learning >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning);
	if (learning_sync >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC,
			 learning_sync);

	if (cost > 0)
		addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost);

	if (priority >= 0)
		addattr16(&req.n, sizeof(req), IFLA_BRPORT_PRIORITY, priority);

	if (state >= 0)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state);

	if (neigh_suppress != -1)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_NEIGH_SUPPRESS,
			 neigh_suppress);
	if (vlan_tunnel != -1)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_VLAN_TUNNEL,
			 vlan_tunnel);
	if (isolated != -1)
		addattr8(&req.n, sizeof(req), IFLA_BRPORT_ISOLATED, isolated);

	if (backup_port_idx != -1)
		addattr32(&req.n, sizeof(req), IFLA_BRPORT_BACKUP_PORT,
			  backup_port_idx);

	addattr_nest_end(&req.n, nest);

	/* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
	 * designates master or self operation and IFLA_BRIDGE_MODE
	 * for hw 'vepa' or 'veb' operation modes. The hwmodes are
	 * only valid in 'self' mode on some devices so far.
	 */
	if (mode >= 0 || flags > 0) {
		nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);

		if (flags > 0)
			addattr16(&req.n, sizeof(req), IFLA_BRIDGE_FLAGS, flags);

		if (mode >= 0)
			addattr16(&req.n, sizeof(req), IFLA_BRIDGE_MODE, mode);

		addattr_nest_end(&req.n, nest);
	}

	if (rtnl_talk(&rth, &req.n, NULL) < 0)
		return -1;

	return 0;
}

static int brlink_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 = ll_name_to_index(filter_dev);
		if (!filter_index)
			return nodev(filter_dev);
	}

	if (show_details) {
		if (rtnl_linkdump_req_filter(&rth, PF_BRIDGE,
					     (compress_vlans ?
					      RTEXT_FILTER_BRVLAN_COMPRESSED :
					      RTEXT_FILTER_BRVLAN)) < 0) {
			perror("Cannon send dump request");
			exit(1);
		}
	} else {
		if (rtnl_linkdump_req(&rth, PF_BRIDGE) < 0) {
			perror("Cannon send dump request");
			exit(1);
		}
	}

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

	delete_json_obj();
	fflush(stdout);
	return 0;
}

int do_link(int argc, char **argv)
{
	ll_init_map(&rth);
	if (argc > 0) {
		if (matches(*argv, "set") == 0 ||
		    matches(*argv, "change") == 0)
			return brlink_modify(argc-1, argv+1);
		if (matches(*argv, "show") == 0 ||
		    matches(*argv, "lst") == 0 ||
		    matches(*argv, "list") == 0)
			return brlink_show(argc-1, argv+1);
		if (matches(*argv, "help") == 0)
			usage();
	} else
		return brlink_show(0, NULL);

	fprintf(stderr, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
6054c1eb	1	/* SPDX-License-Identifier: GPL-2.0 */
d04bc300 SH	2
	3	#include <stdio.h>
	4	#include <stdlib.h>
	5	#include <unistd.h>
	6	#include <time.h>
	7	#include <sys/socket.h>
	8	#include <sys/time.h>
	9	#include <netinet/in.h>
	10	#include <linux/if.h>
	11	#include <linux/if_bridge.h>
	12	#include <string.h>
64108901	13	#include <stdbool.h>
d04bc300	14
f32e4977	15	#include "json_print.h"
64108901	16	#include "libnetlink.h"
d04bc300 SH	17	#include "utils.h"
	18	#include "br_common.h"
	19
9dca899b	20	static unsigned int filter_index;
64108901	21
d04bc300 SH	22	static const char *port_states[] = {
	23	[BR_STATE_DISABLED] = "disabled",
	24	[BR_STATE_LISTENING] = "listening",
	25	[BR_STATE_LEARNING] = "learning",
	26	[BR_STATE_FORWARDING] = "forwarding",
	27	[BR_STATE_BLOCKING] = "blocking",
	28	};
	29
f32e4977 SH	30	static const char *hw_mode[] = {
	31	"VEB", "VEPA"
	32	};
	33
	34	static void print_link_flags(FILE *fp, unsigned int flags, unsigned int mdown)
d04bc300	35	{
f32e4977	36	open_json_array(PRINT_ANY, is_json_context() ? "flags" : "<");
d04bc300	37	if (flags & IFF_UP && !(flags & IFF_RUNNING))
f32e4977 SH	38	print_string(PRINT_ANY, NULL,
f32e4977 SH	39	flags ? "%s," : "%s", "NO-CARRIER");
d04bc300	40	flags &= ~IFF_RUNNING;
f32e4977 SH	41
	42	#define _PF(f) if (flags&IFF_##f) { \
	43	flags &= ~IFF_##f ; \
	44	print_string(PRINT_ANY, NULL, flags ? "%s," : "%s", #f); }
d04bc300 SH	45	_PF(LOOPBACK);
	46	_PF(BROADCAST);
	47	_PF(POINTOPOINT);
	48	_PF(MULTICAST);
	49	_PF(NOARP);
	50	_PF(ALLMULTI);
	51	_PF(PROMISC);
	52	_PF(MASTER);
	53	_PF(SLAVE);
	54	_PF(DEBUG);
	55	_PF(DYNAMIC);
	56	_PF(AUTOMEDIA);
	57	_PF(PORTSEL);
	58	_PF(NOTRAILERS);
	59	_PF(UP);
	60	_PF(LOWER_UP);
	61	_PF(DORMANT);
	62	_PF(ECHO);
	63	#undef _PF
df4b043f	64	if (flags)
f32e4977 SH	65	print_hex(PRINT_ANY, NULL, "%x", flags);
	66	if (mdown)
	67	print_string(PRINT_ANY, NULL, ",%s", "M-DOWN");
	68	close_json_array(PRINT_ANY, "> ");
d04bc300 SH	69	}
d04bc300 SH	70
f32e4977 SH	71	static void print_portstate(__u8 state)
	72	{
	73	if (state <= BR_STATE_BLOCKING)
	74	print_string(PRINT_ANY, "state",
	75	"state %s ", port_states[state]);
	76	else
	77	print_uint(PRINT_ANY, "state",
	78	"state (%d) ", state);
	79	}
b1b7ce0f	80
f32e4977	81	static void print_onoff(FILE fp, const char flag, __u8 val)
d04bc300	82	{
f32e4977 SH	83	if (is_json_context())
f32e4977 SH	84	print_bool(PRINT_JSON, flag, NULL, val);
d04bc300	85	else
f32e4977	86	fprintf(fp, "%s %s ", flag, val ? "on" : "off");
d04bc300 SH	87	}
d04bc300 SH	88
f32e4977	89	static void print_hwmode(__u16 mode)
b1b7ce0f	90	{
f32e4977 SH	91	if (mode >= ARRAY_SIZE(hw_mode))
f32e4977 SH	92	print_0xhex(PRINT_ANY, "hwmode",
90c5c969	93	"hwmode %#llx ", mode);
b1b7ce0f	94	else
f32e4977 SH	95	print_string(PRINT_ANY, "hwmode",
f32e4977 SH	96	"hwmode %s ", hw_mode[mode]);
b1b7ce0f VY	97	}
b1b7ce0f VY	98
f32e4977	99	static void print_protinfo(FILE fp, struct rtattr attr)
b1b7ce0f	100	{
f32e4977 SH	101	if (attr->rta_type & NLA_F_NESTED) {
	102	struct rtattr *prtb[IFLA_BRPORT_MAX + 1];
	103
	104	parse_rtattr_nested(prtb, IFLA_BRPORT_MAX, attr);
	105
	106	if (prtb[IFLA_BRPORT_STATE])
	107	print_portstate(rta_getattr_u8(prtb[IFLA_BRPORT_STATE]));
	108
	109	if (prtb[IFLA_BRPORT_PRIORITY])
	110	print_uint(PRINT_ANY, "priority",
	111	"priority %u ",
	112	rta_getattr_u16(prtb[IFLA_BRPORT_PRIORITY]));
	113
	114	if (prtb[IFLA_BRPORT_COST])
	115	print_uint(PRINT_ANY, "cost",
	116	"cost %u ",
	117	rta_getattr_u32(prtb[IFLA_BRPORT_COST]));
	118
	119	if (!show_details)
	120	return;
	121
	122	if (!is_json_context())
	123	fprintf(fp, "%s ", _SL_);
	124
	125	if (prtb[IFLA_BRPORT_MODE])
	126	print_onoff(fp, "hairpin",
	127	rta_getattr_u8(prtb[IFLA_BRPORT_MODE]));
	128	if (prtb[IFLA_BRPORT_GUARD])
	129	print_onoff(fp, "guard",
	130	rta_getattr_u8(prtb[IFLA_BRPORT_GUARD]));
	131	if (prtb[IFLA_BRPORT_PROTECT])
	132	print_onoff(fp, "root_block",
	133	rta_getattr_u8(prtb[IFLA_BRPORT_PROTECT]));
	134	if (prtb[IFLA_BRPORT_FAST_LEAVE])
	135	print_onoff(fp, "fastleave",
	136	rta_getattr_u8(prtb[IFLA_BRPORT_FAST_LEAVE]));
	137	if (prtb[IFLA_BRPORT_LEARNING])
	138	print_onoff(fp, "learning",
	139	rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING]));
	140	if (prtb[IFLA_BRPORT_LEARNING_SYNC])
	141	print_onoff(fp, "learning_sync",
	142	rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING_SYNC]));
	143	if (prtb[IFLA_BRPORT_UNICAST_FLOOD])
	144	print_onoff(fp, "flood",
	145	rta_getattr_u8(prtb[IFLA_BRPORT_UNICAST_FLOOD]));
	146	if (prtb[IFLA_BRPORT_MCAST_FLOOD])
	147	print_onoff(fp, "mcast_flood",
	148	rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_FLOOD]));
b5a754b1 TJ	149	if (prtb[IFLA_BRPORT_MCAST_TO_UCAST])
	150	print_onoff(fp, "mcast_to_unicast",
	151	rta_getattr_u8(prtb[IFLA_BRPORT_MCAST_TO_UCAST]));
f32e4977 SH	152	if (prtb[IFLA_BRPORT_NEIGH_SUPPRESS])
	153	print_onoff(fp, "neigh_suppress",
	154	rta_getattr_u8(prtb[IFLA_BRPORT_NEIGH_SUPPRESS]));
	155	if (prtb[IFLA_BRPORT_VLAN_TUNNEL])
	156	print_onoff(fp, "vlan_tunnel",
	157	rta_getattr_u8(prtb[IFLA_BRPORT_VLAN_TUNNEL]));
d13d52d0 NA	158
	159	if (prtb[IFLA_BRPORT_BACKUP_PORT]) {
	160	int ifidx;
	161
	162	ifidx = rta_getattr_u32(prtb[IFLA_BRPORT_BACKUP_PORT]);
	163	print_string(PRINT_ANY,
	164	"backup_port", "backup_port %s ",
	165	ll_index_to_name(ifidx));
	166	}
	167
05001bcf NA	168	if (prtb[IFLA_BRPORT_ISOLATED])
	169	print_onoff(fp, "isolated",
	170	rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED]));
f32e4977 SH	171	} else
f32e4977 SH	172	print_portstate(rta_getattr_u8(attr));
b1b7ce0f VY	173	}
b1b7ce0f VY	174
f32e4977 SH	175
	176	/*
	177	* This is reported by HW devices that have some bridging
	178	* capabilities.
	179	*/
0f362674	180	static void print_af_spec(struct rtattr *attr, int ifindex)
b1b7ce0f	181	{
f32e4977 SH	182	struct rtattr *aftb[IFLA_BRIDGE_MAX+1];
	183
	184	parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, attr);
	185
	186	if (aftb[IFLA_BRIDGE_MODE])
	187	print_hwmode(rta_getattr_u16(aftb[IFLA_BRIDGE_MODE]));
	188
	189	if (!show_details)
	190	return;
	191
	192	if (aftb[IFLA_BRIDGE_VLAN_INFO])
0f362674	193	print_vlan_info(aftb[IFLA_BRIDGE_VLAN_INFO], ifindex);
b1b7ce0f VY	194	}
b1b7ce0f VY	195
cd554f2c	196	int print_linkinfo(struct nlmsghdr n, void arg)
d04bc300 SH	197	{
d04bc300 SH	198	FILE *fp = arg;
d04bc300	199	struct ifinfomsg *ifi = NLMSG_DATA(n);
df4b043f	200	struct rtattr *tb[IFLA_MAX+1];
f32e4977	201	unsigned int m_flag = 0;
fcac9665 SP	202	int len = n->nlmsg_len;
fcac9665 SP	203	const char *name;
d04bc300 SH	204
	205	len -= NLMSG_LENGTH(sizeof(*ifi));
	206	if (len < 0) {
	207	fprintf(stderr, "Message too short!\n");
	208	return -1;
df4b043f	209	}
d04bc300 SH	210
	211	if (!(ifi->ifi_family == AF_BRIDGE \|\| ifi->ifi_family == AF_UNSPEC))
	212	return 0;
	213
64108901 VY	214	if (filter_index && filter_index != ifi->ifi_index)
	215	return 0;
	216
b1b7ce0f	217	parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED);
d04bc300	218
fcac9665 SP	219	name = get_ifname_rta(ifi->ifi_index, tb[IFLA_IFNAME]);
fcac9665 SP	220	if (!name)
d04bc300	221	return -1;
d04bc300	222
f32e4977	223	open_json_object(NULL);
d04bc300	224	if (n->nlmsg_type == RTM_DELLINK)
f32e4977	225	print_bool(PRINT_ANY, "deleted", "Deleted ", true);
d04bc300	226
f32e4977	227	print_int(PRINT_ANY, "ifindex", "%d: ", ifi->ifi_index);
4328b687	228	m_flag = print_name_and_link("%s: ", name, tb);
f32e4977	229	print_link_flags(fp, ifi->ifi_flags, m_flag);
d04bc300 SH	230
d04bc300 SH	231	if (tb[IFLA_MTU])
f32e4977 SH	232	print_int(PRINT_ANY,
	233	"mtu", "mtu %u ",
	234	rta_getattr_u32(tb[IFLA_MTU]));
d04bc300	235
45d3a6ef SP	236	if (tb[IFLA_MASTER]) {
	237	int master = rta_getattr_u32(tb[IFLA_MASTER]);
	238
f32e4977 SH	239	print_string(PRINT_ANY, "master", "master %s ",
f32e4977 SH	240	ll_index_to_name(master));
45d3a6ef	241	}
d04bc300	242
f32e4977 SH	243	if (tb[IFLA_PROTINFO])
f32e4977 SH	244	print_protinfo(fp, tb[IFLA_PROTINFO]);
d04bc300	245
f32e4977	246	if (tb[IFLA_AF_SPEC])
0f362674	247	print_af_spec(tb[IFLA_AF_SPEC], ifi->ifi_index);
d04bc300	248
f32e4977 SH	249	print_string(PRINT_FP, NULL, "%s", "\n");
f32e4977 SH	250	close_json_object();
d04bc300 SH	251	fflush(fp);
	252	return 0;
	253	}
64108901 VY	254
	255	static void usage(void)
	256	{
	257	fprintf(stderr, "Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n");
	258	fprintf(stderr, " [ guard {on \| off} ]\n");
df4b043f	259	fprintf(stderr, " [ hairpin {on \| off} ]\n");
64108901 VY	260	fprintf(stderr, " [ fastleave {on \| off} ]\n");
64108901 VY	261	fprintf(stderr, " [ root_block {on \| off} ]\n");
f0f4ab60	262	fprintf(stderr, " [ learning {on \| off} ]\n");
674bb438	263	fprintf(stderr, " [ learning_sync {on \| off} ]\n");
f0f4ab60	264	fprintf(stderr, " [ flood {on \| off} ]\n");
9208b4e7	265	fprintf(stderr, " [ mcast_flood {on \| off} ]\n");
b5a754b1	266	fprintf(stderr, " [ mcast_to_unicast {on \| off} ]\n");
8cfde5c9 RP	267	fprintf(stderr, " [ neigh_suppress {on \| off} ]\n");
8cfde5c9 RP	268	fprintf(stderr, " [ vlan_tunnel {on \| off} ]\n");
05001bcf	269	fprintf(stderr, " [ isolated {on \| off} ]\n");
64108901	270	fprintf(stderr, " [ hwmode {vepa \| veb} ]\n");
d13d52d0	271	fprintf(stderr, " [ backup_port DEVICE ] [ nobackup_port ]\n");
22a98f51	272	fprintf(stderr, " [ self ] [ master ]\n");
64108901 VY	273	fprintf(stderr, " bridge link show [dev DEV]\n");
	274	exit(-1);
	275	}
	276
	277	static bool on_off(char arg, __s8 attr, char *val)
	278	{
	279	if (strcmp(val, "on") == 0)
	280	*attr = 1;
	281	else if (strcmp(val, "off") == 0)
	282	*attr = 0;
	283	else {
	284	fprintf(stderr,
	285	"Error: argument of \"%s\" must be \"on\" or \"off\"\n",
	286	arg);
	287	return false;
	288	}
	289
	290	return true;
	291	}
	292
	293	static int brlink_modify(int argc, char **argv)
	294	{
	295	struct {
	296	struct nlmsghdr n;
	297	struct ifinfomsg ifm;
	298	char buf[512];
d17b136f PS	299	} req = {
	300	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
	301	.n.nlmsg_flags = NLM_F_REQUEST,
	302	.n.nlmsg_type = RTM_SETLINK,
	303	.ifm.ifi_family = PF_BRIDGE,
	304	};
64108901	305	char *d = NULL;
d13d52d0	306	int backup_port_idx = -1;
41973a47	307	__s8 neigh_suppress = -1;
f0f4ab60	308	__s8 learning = -1;
674bb438	309	__s8 learning_sync = -1;
f0f4ab60	310	__s8 flood = -1;
8cfde5c9	311	__s8 vlan_tunnel = -1;
9208b4e7	312	__s8 mcast_flood = -1;
b5a754b1	313	__s8 mcast_to_unicast = -1;
05001bcf	314	__s8 isolated = -1;
64108901 VY	315	__s8 hairpin = -1;
	316	__s8 bpdu_guard = -1;
	317	__s8 fast_leave = -1;
b1b7ce0f	318	__s8 root_block = -1;
64108901 VY	319	__u32 cost = 0;
	320	__s16 priority = -1;
	321	__s8 state = -1;
	322	__s16 mode = -1;
6fdb4658	323	__u16 flags = 0;
64108901 VY	324	struct rtattr *nest;
64108901 VY	325
64108901 VY	326	while (argc > 0) {
	327	if (strcmp(*argv, "dev") == 0) {
	328	NEXT_ARG();
	329	d = *argv;
	330	} else if (strcmp(*argv, "guard") == 0) {
	331	NEXT_ARG();
	332	if (!on_off("guard", &bpdu_guard, *argv))
42ecedd4	333	return -1;
64108901 VY	334	} else if (strcmp(*argv, "hairpin") == 0) {
64108901 VY	335	NEXT_ARG();
ef367178	336	if (!on_off("hairpin", &hairpin, *argv))
42ecedd4	337	return -1;
64108901 VY	338	} else if (strcmp(*argv, "fastleave") == 0) {
	339	NEXT_ARG();
	340	if (!on_off("fastleave", &fast_leave, *argv))
42ecedd4	341	return -1;
b1b7ce0f VY	342	} else if (strcmp(*argv, "root_block") == 0) {
	343	NEXT_ARG();
	344	if (!on_off("root_block", &root_block, *argv))
42ecedd4	345	return -1;
f0f4ab60 VY	346	} else if (strcmp(*argv, "learning") == 0) {
	347	NEXT_ARG();
	348	if (!on_off("learning", &learning, *argv))
42ecedd4	349	return -1;
674bb438 SF	350	} else if (strcmp(*argv, "learning_sync") == 0) {
	351	NEXT_ARG();
	352	if (!on_off("learning_sync", &learning_sync, *argv))
42ecedd4	353	return -1;
f0f4ab60 VY	354	} else if (strcmp(*argv, "flood") == 0) {
	355	NEXT_ARG();
	356	if (!on_off("flood", &flood, *argv))
42ecedd4	357	return -1;
9208b4e7 NA	358	} else if (strcmp(*argv, "mcast_flood") == 0) {
	359	NEXT_ARG();
	360	if (!on_off("mcast_flood", &mcast_flood, *argv))
	361	return -1;
b5a754b1 TJ	362	} else if (strcmp(*argv, "mcast_to_unicast") == 0) {
	363	NEXT_ARG();
	364	if (!on_off("mcast_to_unicast", &mcast_to_unicast, *argv))
	365	return -1;
a40d0827	366	} else if (strcmp(*argv, "cost") == 0) {
64108901 VY	367	NEXT_ARG();
64108901 VY	368	cost = atoi(*argv);
a40d0827	369	} else if (strcmp(*argv, "priority") == 0) {
64108901 VY	370	NEXT_ARG();
64108901 VY	371	priority = atoi(*argv);
a40d0827	372	} else if (strcmp(*argv, "state") == 0) {
64108901	373	NEXT_ARG();
6b8c871d	374	char *endptr;
62000e51	375	size_t nstates = ARRAY_SIZE(port_states);
df4b043f	376
6b8c871d AP	377	state = strtol(*argv, &endptr, 10);
	378	if (!(*argv != '\0' && endptr == '\0')) {
	379	for (state = 0; state < nstates; state++)
	380	if (strcmp(port_states[state], *argv) == 0)
	381	break;
	382	if (state == nstates) {
	383	fprintf(stderr,
	384	"Error: invalid STP port state\n");
42ecedd4	385	return -1;
6b8c871d AP	386	}
6b8c871d AP	387	}
a40d0827	388	} else if (strcmp(*argv, "hwmode") == 0) {
64108901	389	NEXT_ARG();
a40d0827	390	flags = BRIDGE_FLAGS_SELF;
64108901 VY	391	if (strcmp(*argv, "vepa") == 0)
	392	mode = BRIDGE_MODE_VEPA;
	393	else if (strcmp(*argv, "veb") == 0)
	394	mode = BRIDGE_MODE_VEB;
	395	else {
	396	fprintf(stderr,
df4b043f	397	"Mode argument must be \"vepa\" or \"veb\".\n");
42ecedd4	398	return -1;
64108901	399	}
6fdb4658	400	} else if (strcmp(*argv, "self") == 0) {
22a98f51 RP	401	flags \|= BRIDGE_FLAGS_SELF;
	402	} else if (strcmp(*argv, "master") == 0) {
	403	flags \|= BRIDGE_FLAGS_MASTER;
41973a47 RP	404	} else if (strcmp(*argv, "neigh_suppress") == 0) {
	405	NEXT_ARG();
	406	if (!on_off("neigh_suppress", &neigh_suppress,
	407	*argv))
	408	return -1;
8cfde5c9 RP	409	} else if (strcmp(*argv, "vlan_tunnel") == 0) {
	410	NEXT_ARG();
	411	if (!on_off("vlan_tunnel", &vlan_tunnel,
	412	*argv))
	413	return -1;
05001bcf NA	414	} else if (strcmp(*argv, "isolated") == 0) {
	415	NEXT_ARG();
	416	if (!on_off("isolated", &isolated, *argv))
	417	return -1;
d13d52d0 NA	418	} else if (strcmp(*argv, "backup_port") == 0) {
	419	NEXT_ARG();
	420	backup_port_idx = ll_name_to_index(*argv);
	421	if (!backup_port_idx) {
	422	fprintf(stderr, "Error: device %s does not exist\n",
	423	*argv);
	424	return -1;
	425	}
	426	} else if (strcmp(*argv, "nobackup_port") == 0) {
	427	backup_port_idx = 0;
64108901 VY	428	} else {
	429	usage();
	430	}
	431	argc--; argv++;
	432	}
	433	if (d == NULL) {
	434	fprintf(stderr, "Device is a required argument.\n");
42ecedd4	435	return -1;
64108901 VY	436	}
	437
	438
	439	req.ifm.ifi_index = ll_name_to_index(d);
	440	if (req.ifm.ifi_index == 0) {
	441	fprintf(stderr, "Cannot find bridge device \"%s\"\n", d);
42ecedd4	442	return -1;
64108901 VY	443	}
	444
	445	/* Nested PROTINFO attribute. Contains: port flags, cost, priority and
	446	* state.
	447	*/
	448	nest = addattr_nest(&req.n, sizeof(req),
	449	IFLA_PROTINFO \| NLA_F_NESTED);
	450	/* Flags first */
	451	if (bpdu_guard >= 0)
	452	addattr8(&req.n, sizeof(req), IFLA_BRPORT_GUARD, bpdu_guard);
	453	if (hairpin >= 0)
	454	addattr8(&req.n, sizeof(req), IFLA_BRPORT_MODE, hairpin);
	455	if (fast_leave >= 0)
	456	addattr8(&req.n, sizeof(req), IFLA_BRPORT_FAST_LEAVE,
	457	fast_leave);
b1b7ce0f VY	458	if (root_block >= 0)
b1b7ce0f VY	459	addattr8(&req.n, sizeof(req), IFLA_BRPORT_PROTECT, root_block);
f0f4ab60 VY	460	if (flood >= 0)
f0f4ab60 VY	461	addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood);
9208b4e7 NA	462	if (mcast_flood >= 0)
	463	addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_FLOOD,
	464	mcast_flood);
b5a754b1 TJ	465	if (mcast_to_unicast >= 0)
	466	addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_TO_UCAST,
	467	mcast_to_unicast);
f0f4ab60 VY	468	if (learning >= 0)
f0f4ab60 VY	469	addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning);
674bb438 SF	470	if (learning_sync >= 0)
	471	addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC,
	472	learning_sync);
64108901 VY	473
	474	if (cost > 0)
	475	addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost);
	476
	477	if (priority >= 0)
	478	addattr16(&req.n, sizeof(req), IFLA_BRPORT_PRIORITY, priority);
	479
	480	if (state >= 0)
	481	addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state);
	482
41973a47 RP	483	if (neigh_suppress != -1)
	484	addattr8(&req.n, sizeof(req), IFLA_BRPORT_NEIGH_SUPPRESS,
	485	neigh_suppress);
8cfde5c9 RP	486	if (vlan_tunnel != -1)
	487	addattr8(&req.n, sizeof(req), IFLA_BRPORT_VLAN_TUNNEL,
	488	vlan_tunnel);
05001bcf NA	489	if (isolated != -1)
05001bcf NA	490	addattr8(&req.n, sizeof(req), IFLA_BRPORT_ISOLATED, isolated);
41973a47	491
d13d52d0 NA	492	if (backup_port_idx != -1)
	493	addattr32(&req.n, sizeof(req), IFLA_BRPORT_BACKUP_PORT,
	494	backup_port_idx);
	495
64108901 VY	496	addattr_nest_end(&req.n, nest);
64108901 VY	497
6fdb4658 RP	498	/* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
	499	* designates master or self operation and IFLA_BRIDGE_MODE
	500	* for hw 'vepa' or 'veb' operation modes. The hwmodes are
	501	* only valid in 'self' mode on some devices so far.
64108901	502	*/
6fdb4658	503	if (mode >= 0 \|\| flags > 0) {
64108901 VY	504	nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);
64108901 VY	505
6fdb4658 RP	506	if (flags > 0)
6fdb4658 RP	507	addattr16(&req.n, sizeof(req), IFLA_BRIDGE_FLAGS, flags);
64108901 VY	508
	509	if (mode >= 0)
	510	addattr16(&req.n, sizeof(req), IFLA_BRIDGE_MODE, mode);
	511
	512	addattr_nest_end(&req.n, nest);
	513	}
	514
86bf43c7	515	if (rtnl_talk(&rth, &req.n, NULL) < 0)
42ecedd4	516	return -1;
64108901 VY	517
	518	return 0;
	519	}
	520
	521	static int brlink_show(int argc, char **argv)
	522	{
	523	char *filter_dev = NULL;
	524
	525	while (argc > 0) {
	526	if (strcmp(*argv, "dev") == 0) {
	527	NEXT_ARG();
	528	if (filter_dev)
	529	duparg("dev", *argv);
	530	filter_dev = *argv;
	531	}
	532	argc--; argv++;
	533	}
	534
	535	if (filter_dev) {
fe99adbc SP	536	filter_index = ll_name_to_index(filter_dev);
	537	if (!filter_index)
	538	return nodev(filter_dev);
64108901 VY	539	}
64108901 VY	540
fab9a18a	541	if (show_details) {
31ae2912	542	if (rtnl_linkdump_req_filter(&rth, PF_BRIDGE,
fab9a18a RM	543	(compress_vlans ?
	544	RTEXT_FILTER_BRVLAN_COMPRESSED :
	545	RTEXT_FILTER_BRVLAN)) < 0) {
	546	perror("Cannon send dump request");
	547	exit(1);
	548	}
	549	} else {
31ae2912	550	if (rtnl_linkdump_req(&rth, PF_BRIDGE) < 0) {
fab9a18a RM	551	perror("Cannon send dump request");
	552	exit(1);
	553	}
64108901 VY	554	}
64108901 VY	555
f32e4977	556	new_json_obj(json);
64108901 VY	557	if (rtnl_dump_filter(&rth, print_linkinfo, stdout) < 0) {
	558	fprintf(stderr, "Dump terminated\n");
	559	exit(1);
	560	}
f32e4977 SH	561
	562	delete_json_obj();
	563	fflush(stdout);
64108901 VY	564	return 0;
	565	}
	566
	567	int do_link(int argc, char **argv)
	568	{
	569	ll_init_map(&rth);
	570	if (argc > 0) {
	571	if (matches(*argv, "set") == 0 \|\|
	572	matches(*argv, "change") == 0)
	573	return brlink_modify(argc-1, argv+1);
	574	if (matches(*argv, "show") == 0 \|\|
	575	matches(*argv, "lst") == 0 \|\|
	576	matches(*argv, "list") == 0)
	577	return brlink_show(argc-1, argv+1);
	578	if (matches(*argv, "help") == 0)
	579	usage();
	580	} else
	581	return brlink_show(0, NULL);
	582
	583	fprintf(stderr, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv);
	584	exit(-1);
	585	}