[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 %#hx ", 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_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_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(const struct sockaddr_nl *who,
		   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,	"                               [ 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, "                               [ 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;
	__s8 neigh_suppress = -1;
	__s8 learning = -1;
	__s8 learning_sync = -1;
	__s8 flood = -1;
	__s8 vlan_tunnel = -1;
	__s8 mcast_flood = -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, "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 {
			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 (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);

	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_wilddump_req_filter(&rth, PF_BRIDGE, RTM_GETLINK,
					     (compress_vlans ?
					      RTEXT_FILTER_BRVLAN_COMPRESSED :
					      RTEXT_FILTER_BRVLAN)) < 0) {
			perror("Cannon send dump request");
			exit(1);
		}
	} else {
		if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETLINK) < 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))
	92	print_0xhex(PRINT_ANY, "hwmode",
	93	"hwmode %#hx ", 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]));
	149	if (prtb[IFLA_BRPORT_NEIGH_SUPPRESS])
	150	print_onoff(fp, "neigh_suppress",
	151	rta_getattr_u8(prtb[IFLA_BRPORT_NEIGH_SUPPRESS]));
	152	if (prtb[IFLA_BRPORT_VLAN_TUNNEL])
	153	print_onoff(fp, "vlan_tunnel",
	154	rta_getattr_u8(prtb[IFLA_BRPORT_VLAN_TUNNEL]));
05001bcf NA	155	if (prtb[IFLA_BRPORT_ISOLATED])
	156	print_onoff(fp, "isolated",
	157	rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED]));
f32e4977 SH	158	} else
f32e4977 SH	159	print_portstate(rta_getattr_u8(attr));
b1b7ce0f VY	160	}
b1b7ce0f VY	161
f32e4977 SH	162
	163	/*
	164	* This is reported by HW devices that have some bridging
	165	* capabilities.
	166	*/
0f362674	167	static void print_af_spec(struct rtattr *attr, int ifindex)
b1b7ce0f	168	{
f32e4977 SH	169	struct rtattr *aftb[IFLA_BRIDGE_MAX+1];
	170
	171	parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, attr);
	172
	173	if (aftb[IFLA_BRIDGE_MODE])
	174	print_hwmode(rta_getattr_u16(aftb[IFLA_BRIDGE_MODE]));
	175
	176	if (!show_details)
	177	return;
	178
	179	if (aftb[IFLA_BRIDGE_VLAN_INFO])
0f362674	180	print_vlan_info(aftb[IFLA_BRIDGE_VLAN_INFO], ifindex);
b1b7ce0f VY	181	}
b1b7ce0f VY	182
d04bc300 SH	183	int print_linkinfo(const struct sockaddr_nl *who,
	184	struct nlmsghdr n, void arg)
	185	{
	186	FILE *fp = arg;
d04bc300	187	struct ifinfomsg *ifi = NLMSG_DATA(n);
df4b043f	188	struct rtattr *tb[IFLA_MAX+1];
f32e4977	189	unsigned int m_flag = 0;
fcac9665 SP	190	int len = n->nlmsg_len;
fcac9665 SP	191	const char *name;
d04bc300 SH	192
	193	len -= NLMSG_LENGTH(sizeof(*ifi));
	194	if (len < 0) {
	195	fprintf(stderr, "Message too short!\n");
	196	return -1;
df4b043f	197	}
d04bc300 SH	198
	199	if (!(ifi->ifi_family == AF_BRIDGE \|\| ifi->ifi_family == AF_UNSPEC))
	200	return 0;
	201
64108901 VY	202	if (filter_index && filter_index != ifi->ifi_index)
	203	return 0;
	204
b1b7ce0f	205	parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED);
d04bc300	206
fcac9665 SP	207	name = get_ifname_rta(ifi->ifi_index, tb[IFLA_IFNAME]);
fcac9665 SP	208	if (!name)
d04bc300	209	return -1;
d04bc300	210
f32e4977	211	open_json_object(NULL);
d04bc300	212	if (n->nlmsg_type == RTM_DELLINK)
f32e4977	213	print_bool(PRINT_ANY, "deleted", "Deleted ", true);
d04bc300	214
f32e4977	215	print_int(PRINT_ANY, "ifindex", "%d: ", ifi->ifi_index);
4328b687	216	m_flag = print_name_and_link("%s: ", name, tb);
f32e4977	217	print_link_flags(fp, ifi->ifi_flags, m_flag);
d04bc300 SH	218
d04bc300 SH	219	if (tb[IFLA_MTU])
f32e4977 SH	220	print_int(PRINT_ANY,
	221	"mtu", "mtu %u ",
	222	rta_getattr_u32(tb[IFLA_MTU]));
d04bc300	223
45d3a6ef SP	224	if (tb[IFLA_MASTER]) {
	225	int master = rta_getattr_u32(tb[IFLA_MASTER]);
	226
f32e4977 SH	227	print_string(PRINT_ANY, "master", "master %s ",
f32e4977 SH	228	ll_index_to_name(master));
45d3a6ef	229	}
d04bc300	230
f32e4977 SH	231	if (tb[IFLA_PROTINFO])
f32e4977 SH	232	print_protinfo(fp, tb[IFLA_PROTINFO]);
d04bc300	233
f32e4977	234	if (tb[IFLA_AF_SPEC])
0f362674	235	print_af_spec(tb[IFLA_AF_SPEC], ifi->ifi_index);
d04bc300	236
f32e4977 SH	237	print_string(PRINT_FP, NULL, "%s", "\n");
f32e4977 SH	238	close_json_object();
d04bc300 SH	239	fflush(fp);
	240	return 0;
	241	}
64108901 VY	242
	243	static void usage(void)
	244	{
	245	fprintf(stderr, "Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n");
	246	fprintf(stderr, " [ guard {on \| off} ]\n");
df4b043f	247	fprintf(stderr, " [ hairpin {on \| off} ]\n");
64108901 VY	248	fprintf(stderr, " [ fastleave {on \| off} ]\n");
64108901 VY	249	fprintf(stderr, " [ root_block {on \| off} ]\n");
f0f4ab60	250	fprintf(stderr, " [ learning {on \| off} ]\n");
674bb438	251	fprintf(stderr, " [ learning_sync {on \| off} ]\n");
f0f4ab60	252	fprintf(stderr, " [ flood {on \| off} ]\n");
9208b4e7	253	fprintf(stderr, " [ mcast_flood {on \| off} ]\n");
8cfde5c9 RP	254	fprintf(stderr, " [ neigh_suppress {on \| off} ]\n");
8cfde5c9 RP	255	fprintf(stderr, " [ vlan_tunnel {on \| off} ]\n");
05001bcf	256	fprintf(stderr, " [ isolated {on \| off} ]\n");
64108901	257	fprintf(stderr, " [ hwmode {vepa \| veb} ]\n");
22a98f51	258	fprintf(stderr, " [ self ] [ master ]\n");
64108901 VY	259	fprintf(stderr, " bridge link show [dev DEV]\n");
	260	exit(-1);
	261	}
	262
	263	static bool on_off(char arg, __s8 attr, char *val)
	264	{
	265	if (strcmp(val, "on") == 0)
	266	*attr = 1;
	267	else if (strcmp(val, "off") == 0)
	268	*attr = 0;
	269	else {
	270	fprintf(stderr,
	271	"Error: argument of \"%s\" must be \"on\" or \"off\"\n",
	272	arg);
	273	return false;
	274	}
	275
	276	return true;
	277	}
	278
	279	static int brlink_modify(int argc, char **argv)
	280	{
	281	struct {
	282	struct nlmsghdr n;
	283	struct ifinfomsg ifm;
	284	char buf[512];
d17b136f PS	285	} req = {
	286	.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
	287	.n.nlmsg_flags = NLM_F_REQUEST,
	288	.n.nlmsg_type = RTM_SETLINK,
	289	.ifm.ifi_family = PF_BRIDGE,
	290	};
64108901	291	char *d = NULL;
41973a47	292	__s8 neigh_suppress = -1;
f0f4ab60	293	__s8 learning = -1;
674bb438	294	__s8 learning_sync = -1;
f0f4ab60	295	__s8 flood = -1;
8cfde5c9	296	__s8 vlan_tunnel = -1;
9208b4e7	297	__s8 mcast_flood = -1;
05001bcf	298	__s8 isolated = -1;
64108901 VY	299	__s8 hairpin = -1;
	300	__s8 bpdu_guard = -1;
	301	__s8 fast_leave = -1;
b1b7ce0f	302	__s8 root_block = -1;
64108901 VY	303	__u32 cost = 0;
	304	__s16 priority = -1;
	305	__s8 state = -1;
	306	__s16 mode = -1;
6fdb4658	307	__u16 flags = 0;
64108901 VY	308	struct rtattr *nest;
64108901 VY	309
64108901 VY	310	while (argc > 0) {
	311	if (strcmp(*argv, "dev") == 0) {
	312	NEXT_ARG();
	313	d = *argv;
	314	} else if (strcmp(*argv, "guard") == 0) {
	315	NEXT_ARG();
	316	if (!on_off("guard", &bpdu_guard, *argv))
42ecedd4	317	return -1;
64108901 VY	318	} else if (strcmp(*argv, "hairpin") == 0) {
64108901 VY	319	NEXT_ARG();
ef367178	320	if (!on_off("hairpin", &hairpin, *argv))
42ecedd4	321	return -1;
64108901 VY	322	} else if (strcmp(*argv, "fastleave") == 0) {
	323	NEXT_ARG();
	324	if (!on_off("fastleave", &fast_leave, *argv))
42ecedd4	325	return -1;
b1b7ce0f VY	326	} else if (strcmp(*argv, "root_block") == 0) {
	327	NEXT_ARG();
	328	if (!on_off("root_block", &root_block, *argv))
42ecedd4	329	return -1;
f0f4ab60 VY	330	} else if (strcmp(*argv, "learning") == 0) {
	331	NEXT_ARG();
	332	if (!on_off("learning", &learning, *argv))
42ecedd4	333	return -1;
674bb438 SF	334	} else if (strcmp(*argv, "learning_sync") == 0) {
	335	NEXT_ARG();
	336	if (!on_off("learning_sync", &learning_sync, *argv))
42ecedd4	337	return -1;
f0f4ab60 VY	338	} else if (strcmp(*argv, "flood") == 0) {
	339	NEXT_ARG();
	340	if (!on_off("flood", &flood, *argv))
42ecedd4	341	return -1;
9208b4e7 NA	342	} else if (strcmp(*argv, "mcast_flood") == 0) {
	343	NEXT_ARG();
	344	if (!on_off("mcast_flood", &mcast_flood, *argv))
	345	return -1;
a40d0827	346	} else if (strcmp(*argv, "cost") == 0) {
64108901 VY	347	NEXT_ARG();
64108901 VY	348	cost = atoi(*argv);
a40d0827	349	} else if (strcmp(*argv, "priority") == 0) {
64108901 VY	350	NEXT_ARG();
64108901 VY	351	priority = atoi(*argv);
a40d0827	352	} else if (strcmp(*argv, "state") == 0) {
64108901	353	NEXT_ARG();
6b8c871d	354	char *endptr;
62000e51	355	size_t nstates = ARRAY_SIZE(port_states);
df4b043f	356
6b8c871d AP	357	state = strtol(*argv, &endptr, 10);
	358	if (!(*argv != '\0' && endptr == '\0')) {
	359	for (state = 0; state < nstates; state++)
	360	if (strcmp(port_states[state], *argv) == 0)
	361	break;
	362	if (state == nstates) {
	363	fprintf(stderr,
	364	"Error: invalid STP port state\n");
42ecedd4	365	return -1;
6b8c871d AP	366	}
6b8c871d AP	367	}
a40d0827	368	} else if (strcmp(*argv, "hwmode") == 0) {
64108901	369	NEXT_ARG();
a40d0827	370	flags = BRIDGE_FLAGS_SELF;
64108901 VY	371	if (strcmp(*argv, "vepa") == 0)
	372	mode = BRIDGE_MODE_VEPA;
	373	else if (strcmp(*argv, "veb") == 0)
	374	mode = BRIDGE_MODE_VEB;
	375	else {
	376	fprintf(stderr,
df4b043f	377	"Mode argument must be \"vepa\" or \"veb\".\n");
42ecedd4	378	return -1;
64108901	379	}
6fdb4658	380	} else if (strcmp(*argv, "self") == 0) {
22a98f51 RP	381	flags \|= BRIDGE_FLAGS_SELF;
	382	} else if (strcmp(*argv, "master") == 0) {
	383	flags \|= BRIDGE_FLAGS_MASTER;
41973a47 RP	384	} else if (strcmp(*argv, "neigh_suppress") == 0) {
	385	NEXT_ARG();
	386	if (!on_off("neigh_suppress", &neigh_suppress,
	387	*argv))
	388	return -1;
8cfde5c9 RP	389	} else if (strcmp(*argv, "vlan_tunnel") == 0) {
	390	NEXT_ARG();
	391	if (!on_off("vlan_tunnel", &vlan_tunnel,
	392	*argv))
	393	return -1;
05001bcf NA	394	} else if (strcmp(*argv, "isolated") == 0) {
	395	NEXT_ARG();
	396	if (!on_off("isolated", &isolated, *argv))
	397	return -1;
64108901 VY	398	} else {
	399	usage();
	400	}
	401	argc--; argv++;
	402	}
	403	if (d == NULL) {
	404	fprintf(stderr, "Device is a required argument.\n");
42ecedd4	405	return -1;
64108901 VY	406	}
	407
	408
	409	req.ifm.ifi_index = ll_name_to_index(d);
	410	if (req.ifm.ifi_index == 0) {
	411	fprintf(stderr, "Cannot find bridge device \"%s\"\n", d);
42ecedd4	412	return -1;
64108901 VY	413	}
	414
	415	/* Nested PROTINFO attribute. Contains: port flags, cost, priority and
	416	* state.
	417	*/
	418	nest = addattr_nest(&req.n, sizeof(req),
	419	IFLA_PROTINFO \| NLA_F_NESTED);
	420	/* Flags first */
	421	if (bpdu_guard >= 0)
	422	addattr8(&req.n, sizeof(req), IFLA_BRPORT_GUARD, bpdu_guard);
	423	if (hairpin >= 0)
	424	addattr8(&req.n, sizeof(req), IFLA_BRPORT_MODE, hairpin);
	425	if (fast_leave >= 0)
	426	addattr8(&req.n, sizeof(req), IFLA_BRPORT_FAST_LEAVE,
	427	fast_leave);
b1b7ce0f VY	428	if (root_block >= 0)
b1b7ce0f VY	429	addattr8(&req.n, sizeof(req), IFLA_BRPORT_PROTECT, root_block);
f0f4ab60 VY	430	if (flood >= 0)
f0f4ab60 VY	431	addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood);
9208b4e7 NA	432	if (mcast_flood >= 0)
	433	addattr8(&req.n, sizeof(req), IFLA_BRPORT_MCAST_FLOOD,
	434	mcast_flood);
f0f4ab60 VY	435	if (learning >= 0)
f0f4ab60 VY	436	addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning);
674bb438 SF	437	if (learning_sync >= 0)
	438	addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC,
	439	learning_sync);
64108901 VY	440
	441	if (cost > 0)
	442	addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost);
	443
	444	if (priority >= 0)
	445	addattr16(&req.n, sizeof(req), IFLA_BRPORT_PRIORITY, priority);
	446
	447	if (state >= 0)
	448	addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state);
	449
41973a47 RP	450	if (neigh_suppress != -1)
	451	addattr8(&req.n, sizeof(req), IFLA_BRPORT_NEIGH_SUPPRESS,
	452	neigh_suppress);
8cfde5c9 RP	453	if (vlan_tunnel != -1)
	454	addattr8(&req.n, sizeof(req), IFLA_BRPORT_VLAN_TUNNEL,
	455	vlan_tunnel);
05001bcf NA	456	if (isolated != -1)
05001bcf NA	457	addattr8(&req.n, sizeof(req), IFLA_BRPORT_ISOLATED, isolated);
41973a47	458
64108901 VY	459	addattr_nest_end(&req.n, nest);
64108901 VY	460
6fdb4658 RP	461	/* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
	462	* designates master or self operation and IFLA_BRIDGE_MODE
	463	* for hw 'vepa' or 'veb' operation modes. The hwmodes are
	464	* only valid in 'self' mode on some devices so far.
64108901	465	*/
6fdb4658	466	if (mode >= 0 \|\| flags > 0) {
64108901 VY	467	nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);
64108901 VY	468
6fdb4658 RP	469	if (flags > 0)
6fdb4658 RP	470	addattr16(&req.n, sizeof(req), IFLA_BRIDGE_FLAGS, flags);
64108901 VY	471
	472	if (mode >= 0)
	473	addattr16(&req.n, sizeof(req), IFLA_BRIDGE_MODE, mode);
	474
	475	addattr_nest_end(&req.n, nest);
	476	}
	477
86bf43c7	478	if (rtnl_talk(&rth, &req.n, NULL) < 0)
42ecedd4	479	return -1;
64108901 VY	480
	481	return 0;
	482	}
	483
	484	static int brlink_show(int argc, char **argv)
	485	{
	486	char *filter_dev = NULL;
	487
	488	while (argc > 0) {
	489	if (strcmp(*argv, "dev") == 0) {
	490	NEXT_ARG();
	491	if (filter_dev)
	492	duparg("dev", *argv);
	493	filter_dev = *argv;
	494	}
	495	argc--; argv++;
	496	}
	497
	498	if (filter_dev) {
fe99adbc SP	499	filter_index = ll_name_to_index(filter_dev);
	500	if (!filter_index)
	501	return nodev(filter_dev);
64108901 VY	502	}
64108901 VY	503
fab9a18a RM	504	if (show_details) {
	505	if (rtnl_wilddump_req_filter(&rth, PF_BRIDGE, RTM_GETLINK,
	506	(compress_vlans ?
	507	RTEXT_FILTER_BRVLAN_COMPRESSED :
	508	RTEXT_FILTER_BRVLAN)) < 0) {
	509	perror("Cannon send dump request");
	510	exit(1);
	511	}
	512	} else {
	513	if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETLINK) < 0) {
	514	perror("Cannon send dump request");
	515	exit(1);
	516	}
64108901 VY	517	}
64108901 VY	518
f32e4977	519	new_json_obj(json);
64108901 VY	520	if (rtnl_dump_filter(&rth, print_linkinfo, stdout) < 0) {
	521	fprintf(stderr, "Dump terminated\n");
	522	exit(1);
	523	}
f32e4977 SH	524
	525	delete_json_obj();
	526	fflush(stdout);
64108901 VY	527	return 0;
	528	}
	529
	530	int do_link(int argc, char **argv)
	531	{
	532	ll_init_map(&rth);
	533	if (argc > 0) {
	534	if (matches(*argv, "set") == 0 \|\|
	535	matches(*argv, "change") == 0)
	536	return brlink_modify(argc-1, argv+1);
	537	if (matches(*argv, "show") == 0 \|\|
	538	matches(*argv, "lst") == 0 \|\|
	539	matches(*argv, "list") == 0)
	540	return brlink_show(argc-1, argv+1);
	541	if (matches(*argv, "help") == 0)
	542	usage();
	543	} else
	544	return brlink_show(0, NULL);
	545
	546	fprintf(stderr, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv);
	547	exit(-1);
	548	}