[thirdparty/iw.git] / mpath.c

#include <net/if.h>
#include <errno.h>
#include <string.h>

#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <netlink/msg.h>
#include <netlink/attr.h>

#include "nl80211.h"
#include "iw.h"

SECTION(mpath);

enum plink_state {
	LISTEN,
	OPN_SNT,
	OPN_RCVD,
	CNF_RCVD,
	ESTAB,
	HOLDING,
	BLOCKED
};


static int print_mpath_handler(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *pinfo[NL80211_MPATH_INFO_MAX + 1];
	char dst[20], next_hop[20], dev[20];
	static struct nla_policy mpath_policy[NL80211_MPATH_INFO_MAX + 1] = {
		[NL80211_MPATH_INFO_FRAME_QLEN] = { .type = NLA_U32 },
		[NL80211_MPATH_INFO_SN] = { .type = NLA_U32 },
		[NL80211_MPATH_INFO_METRIC] = { .type = NLA_U32 },
		[NL80211_MPATH_INFO_EXPTIME] = { .type = NLA_U32 },
		[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT] = { .type = NLA_U32 },
		[NL80211_MPATH_INFO_DISCOVERY_RETRIES] = { .type = NLA_U8 },
		[NL80211_MPATH_INFO_FLAGS] = { .type = NLA_U8 },
	};

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	/*
	 * TODO: validate the interface and mac address!
	 * Otherwise, there's a race condition as soon as
	 * the kernel starts sending mpath notifications.
	 */

	if (!tb[NL80211_ATTR_MPATH_INFO]) {
		fprintf(stderr, "mpath info missing!\n");
		return NL_SKIP;
	}
	if (nla_parse_nested(pinfo, NL80211_MPATH_INFO_MAX,
			     tb[NL80211_ATTR_MPATH_INFO],
			     mpath_policy)) {
		fprintf(stderr, "failed to parse nested attributes!\n");
		return NL_SKIP;
	}

	mac_addr_n2a(dst, nla_data(tb[NL80211_ATTR_MAC]));
	mac_addr_n2a(next_hop, nla_data(tb[NL80211_ATTR_MPATH_NEXT_HOP]));
	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
	printf("%s %s %s", dst, next_hop, dev);
	if (pinfo[NL80211_MPATH_INFO_SN])
		printf("\t%u",
			nla_get_u32(pinfo[NL80211_MPATH_INFO_SN]));
	if (pinfo[NL80211_MPATH_INFO_METRIC])
		printf("\t%u",
			nla_get_u32(pinfo[NL80211_MPATH_INFO_METRIC]));
	if (pinfo[NL80211_MPATH_INFO_FRAME_QLEN])
		printf("\t%u",
			nla_get_u32(pinfo[NL80211_MPATH_INFO_FRAME_QLEN]));
	if (pinfo[NL80211_MPATH_INFO_EXPTIME])
		printf("\t%u",
			nla_get_u32(pinfo[NL80211_MPATH_INFO_EXPTIME]));
	if (pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT])
		printf("\t%u",
		nla_get_u32(pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT]));
	if (pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES])
		printf("\t%u",
		nla_get_u8(pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES]));
	if (pinfo[NL80211_MPATH_INFO_FLAGS])
		printf("\t0x%x",
			nla_get_u8(pinfo[NL80211_MPATH_INFO_FLAGS]));

	printf("\n");
	return NL_SKIP;
}

static int handle_mpath_probe(struct nl80211_state *state,
			      struct nl_msg *msg,
			      int argc, char **argv,
			      enum id_input id)
{
	unsigned char dst[ETH_ALEN];
	unsigned char *frame;
	size_t frame_len;

	if (argc < 3)
		return 1;

	if (mac_addr_a2n(dst, argv[0])) {
		fprintf(stderr, "invalid mac address\n");
		return 2;
	}

	if (strcmp("frame", argv[1]) != 0)
		return 1;

	frame = parse_hex(argv[2], &frame_len);
	if (!frame) {
		fprintf(stderr, "invalid frame pattern: %p\n", frame);
		return 2;
	}

	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
	NLA_PUT(msg, NL80211_ATTR_FRAME, frame_len, frame);

	return 0;
 nla_put_failure:
	return -ENOBUFS;
}
COMMAND(mpath, probe, "<destination MAC address> frame <frame>",
	NL80211_CMD_PROBE_MESH_LINK, 0, CIB_NETDEV, handle_mpath_probe,
	"Inject ethernet frame to given peer overriding the next hop\n"
	"lookup from mpath table.\n."
	"Example: iw dev wlan0 mpath probe xx:xx:xx:xx:xx:xx frame 01:xx:xx:00\n");

static int handle_mpath_get(struct nl80211_state *state,
			    struct nl_msg *msg,
			    int argc, char **argv,
			    enum id_input id)
{
	unsigned char dst[ETH_ALEN];

	if (argc < 1)
		return 1;

	if (mac_addr_a2n(dst, argv[0])) {
		fprintf(stderr, "invalid mac address\n");
		return 2;
	}
	argc--;
	argv++;

	if (argc)
		return 1;

	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);

	register_handler(print_mpath_handler, NULL);

	return 0;
 nla_put_failure:
	return -ENOBUFS;
}
COMMAND(mpath, get, "<MAC address>",
	NL80211_CMD_GET_MPATH, 0, CIB_NETDEV, handle_mpath_get,
	"Get information on mesh path to the given node.");
COMMAND(mpath, del, "<MAC address>",
	NL80211_CMD_DEL_MPATH, 0, CIB_NETDEV, handle_mpath_get,
	"Remove the mesh path to the given node.");

static int handle_mpath_set(struct nl80211_state *state,
			    struct nl_msg *msg,
			    int argc, char **argv,
			    enum id_input id)
{
	unsigned char dst[ETH_ALEN];
	unsigned char next_hop[ETH_ALEN];

	if (argc < 3)
		return 1;

	if (mac_addr_a2n(dst, argv[0])) {
		fprintf(stderr, "invalid destination mac address\n");
		return 2;
	}
	argc--;
	argv++;

	if (strcmp("next_hop", argv[0]) != 0)
		return 1;
	argc--;
	argv++;

	if (mac_addr_a2n(next_hop, argv[0])) {
		fprintf(stderr, "invalid next hop mac address\n");
		return 2;
	}
	argc--;
	argv++;

	if (argc)
		return 1;

	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
	NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);

	register_handler(print_mpath_handler, NULL);
	return 0;
 nla_put_failure:
	return -ENOBUFS;
}
COMMAND(mpath, new, "<destination MAC address> next_hop <next hop MAC address>",
	NL80211_CMD_NEW_MPATH, 0, CIB_NETDEV, handle_mpath_set,
	"Create a new mesh path (instead of relying on automatic discovery).");
COMMAND(mpath, set, "<destination MAC address> next_hop <next hop MAC address>",
	NL80211_CMD_SET_MPATH, 0, CIB_NETDEV, handle_mpath_set,
	"Set an existing mesh path's next hop.");

static int handle_mpath_dump(struct nl80211_state *state,
			     struct nl_msg *msg,
			     int argc, char **argv,
			     enum id_input id)
{
	printf("DEST ADDR         NEXT HOP          IFACE\tSN\tMETRIC\tQLEN\t"
	       "EXPTIME\t\tDTIM\tDRET\tFLAGS\n");
	register_handler(print_mpath_handler, NULL);
	return 0;
}
COMMAND(mpath, dump, NULL,
	NL80211_CMD_GET_MPATH, NLM_F_DUMP, CIB_NETDEV, handle_mpath_dump,
	"List known mesh paths.");
Commit	Line	Data
2ef1be68	1	#include <net/if.h>
3d1e8704	2	#include <errno.h>
d5ac8ad3	3	#include <string.h>
2ef1be68	4
3d1e8704 LCC	5	#include <netlink/genl/genl.h>
	6	#include <netlink/genl/family.h>
	7	#include <netlink/genl/ctrl.h>
	8	#include <netlink/msg.h>
	9	#include <netlink/attr.h>
3d1e8704	10
f408e01b	11	#include "nl80211.h"
3d1e8704 LCC	12	#include "iw.h"
3d1e8704 LCC	13
4698bfc2 JB	14	SECTION(mpath);
4698bfc2 JB	15
3d1e8704 LCC	16	enum plink_state {
	17	LISTEN,
	18	OPN_SNT,
	19	OPN_RCVD,
	20	CNF_RCVD,
	21	ESTAB,
	22	HOLDING,
	23	BLOCKED
	24	};
	25
3d1e8704	26
3d1e8704 LCC	27	static int print_mpath_handler(struct nl_msg msg, void arg)
	28	{
	29	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	30	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	31	struct nlattr *pinfo[NL80211_MPATH_INFO_MAX + 1];
	32	char dst[20], next_hop[20], dev[20];
	33	static struct nla_policy mpath_policy[NL80211_MPATH_INFO_MAX + 1] = {
	34	[NL80211_MPATH_INFO_FRAME_QLEN] = { .type = NLA_U32 },
456ce438	35	[NL80211_MPATH_INFO_SN] = { .type = NLA_U32 },
3d1e8704 LCC	36	[NL80211_MPATH_INFO_METRIC] = { .type = NLA_U32 },
	37	[NL80211_MPATH_INFO_EXPTIME] = { .type = NLA_U32 },
	38	[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT] = { .type = NLA_U32 },
	39	[NL80211_MPATH_INFO_DISCOVERY_RETRIES] = { .type = NLA_U8 },
	40	[NL80211_MPATH_INFO_FLAGS] = { .type = NLA_U8 },
	41	};
	42
	43	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
	44	genlmsg_attrlen(gnlh, 0), NULL);
	45
	46	/*
	47	* TODO: validate the interface and mac address!
	48	* Otherwise, there's a race condition as soon as
	49	* the kernel starts sending mpath notifications.
	50	*/
	51
	52	if (!tb[NL80211_ATTR_MPATH_INFO]) {
5fe70c0e	53	fprintf(stderr, "mpath info missing!\n");
3d1e8704 LCC	54	return NL_SKIP;
	55	}
	56	if (nla_parse_nested(pinfo, NL80211_MPATH_INFO_MAX,
	57	tb[NL80211_ATTR_MPATH_INFO],
	58	mpath_policy)) {
5fe70c0e	59	fprintf(stderr, "failed to parse nested attributes!\n");
3d1e8704 LCC	60	return NL_SKIP;
	61	}
	62
	63	mac_addr_n2a(dst, nla_data(tb[NL80211_ATTR_MAC]));
	64	mac_addr_n2a(next_hop, nla_data(tb[NL80211_ATTR_MPATH_NEXT_HOP]));
	65	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
	66	printf("%s %s %s", dst, next_hop, dev);
456ce438	67	if (pinfo[NL80211_MPATH_INFO_SN])
3d1e8704	68	printf("\t%u",
456ce438	69	nla_get_u32(pinfo[NL80211_MPATH_INFO_SN]));
3d1e8704 LCC	70	if (pinfo[NL80211_MPATH_INFO_METRIC])
	71	printf("\t%u",
	72	nla_get_u32(pinfo[NL80211_MPATH_INFO_METRIC]));
	73	if (pinfo[NL80211_MPATH_INFO_FRAME_QLEN])
	74	printf("\t%u",
	75	nla_get_u32(pinfo[NL80211_MPATH_INFO_FRAME_QLEN]));
	76	if (pinfo[NL80211_MPATH_INFO_EXPTIME])
	77	printf("\t%u",
	78	nla_get_u32(pinfo[NL80211_MPATH_INFO_EXPTIME]));
	79	if (pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT])
	80	printf("\t%u",
	81	nla_get_u32(pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT]));
	82	if (pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES])
	83	printf("\t%u",
	84	nla_get_u8(pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES]));
	85	if (pinfo[NL80211_MPATH_INFO_FLAGS])
	86	printf("\t0x%x",
	87	nla_get_u8(pinfo[NL80211_MPATH_INFO_FLAGS]));
	88
	89	printf("\n");
	90	return NL_SKIP;
	91	}
	92
24091b7f PKC	93	static int handle_mpath_probe(struct nl80211_state *state,
	94	struct nl_msg *msg,
	95	int argc, char **argv,
	96	enum id_input id)
	97	{
	98	unsigned char dst[ETH_ALEN];
	99	unsigned char *frame;
	100	size_t frame_len;
	101
	102	if (argc < 3)
	103	return 1;
	104
	105	if (mac_addr_a2n(dst, argv[0])) {
	106	fprintf(stderr, "invalid mac address\n");
	107	return 2;
	108	}
	109
	110	if (strcmp("frame", argv[1]) != 0)
	111	return 1;
	112
	113	frame = parse_hex(argv[2], &frame_len);
	114	if (!frame) {
	115	fprintf(stderr, "invalid frame pattern: %p\n", frame);
	116	return 2;
	117	}
	118
	119	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
	120	NLA_PUT(msg, NL80211_ATTR_FRAME, frame_len, frame);
	121
	122	return 0;
	123	nla_put_failure:
	124	return -ENOBUFS;
	125	}
	126	COMMAND(mpath, probe, "<destination MAC address> frame <frame>",
	127	NL80211_CMD_PROBE_MESH_LINK, 0, CIB_NETDEV, handle_mpath_probe,
	128	"Inject ethernet frame to given peer overriding the next hop\n"
	129	"lookup from mpath table.\n."
	130	"Example: iw dev wlan0 mpath probe xx:xx:xx:xx:xx:xx frame 01:xx:xx:00\n");
	131
7c37a24d	132	static int handle_mpath_get(struct nl80211_state *state,
f5f937fb	133	struct nl_msg *msg,
05514f95 JB	134	int argc, char **argv,
05514f95 JB	135	enum id_input id)
3d1e8704	136	{
3d1e8704 LCC	137	unsigned char dst[ETH_ALEN];
3d1e8704 LCC	138
f5f937fb	139	if (argc < 1)
5e75fd04	140	return 1;
3d1e8704 LCC	141
	142	if (mac_addr_a2n(dst, argv[0])) {
	143	fprintf(stderr, "invalid mac address\n");
5e75fd04	144	return 2;
3d1e8704 LCC	145	}
	146	argc--;
	147	argv++;
	148
f5f937fb	149	if (argc)
5e75fd04	150	return 1;
3d1e8704 LCC	151
3d1e8704 LCC	152	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
3d1e8704	153
34b23014	154	register_handler(print_mpath_handler, NULL);
3d1e8704	155
70391ccf	156	return 0;
3d1e8704	157	nla_put_failure:
70391ccf	158	return -ENOBUFS;
3d1e8704	159	}
f5f937fb	160	COMMAND(mpath, get, "<MAC address>",
70cf4544 JB	161	NL80211_CMD_GET_MPATH, 0, CIB_NETDEV, handle_mpath_get,
70cf4544 JB	162	"Get information on mesh path to the given node.");
f5f937fb	163	COMMAND(mpath, del, "<MAC address>",
70cf4544 JB	164	NL80211_CMD_DEL_MPATH, 0, CIB_NETDEV, handle_mpath_get,
70cf4544 JB	165	"Remove the mesh path to the given node.");
f5f937fb	166
7c37a24d	167	static int handle_mpath_set(struct nl80211_state *state,
f5f937fb	168	struct nl_msg *msg,
05514f95 JB	169	int argc, char **argv,
05514f95 JB	170	enum id_input id)
3d1e8704	171	{
3d1e8704 LCC	172	unsigned char dst[ETH_ALEN];
	173	unsigned char next_hop[ETH_ALEN];
	174
f5f937fb	175	if (argc < 3)
5e75fd04	176	return 1;
3d1e8704 LCC	177
	178	if (mac_addr_a2n(dst, argv[0])) {
	179	fprintf(stderr, "invalid destination mac address\n");
5e75fd04	180	return 2;
3d1e8704 LCC	181	}
	182	argc--;
	183	argv++;
	184
f5f937fb	185	if (strcmp("next_hop", argv[0]) != 0)
5e75fd04	186	return 1;
3d1e8704 LCC	187	argc--;
	188	argv++;
	189
	190	if (mac_addr_a2n(next_hop, argv[0])) {
	191	fprintf(stderr, "invalid next hop mac address\n");
5e75fd04	192	return 2;
3d1e8704 LCC	193	}
	194	argc--;
	195	argv++;
	196
f5f937fb	197	if (argc)
5e75fd04	198	return 1;
3d1e8704	199
3d1e8704	200	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
3d1e8704 LCC	201	NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
3d1e8704 LCC	202
34b23014	203	register_handler(print_mpath_handler, NULL);
70391ccf	204	return 0;
3d1e8704	205	nla_put_failure:
70391ccf	206	return -ENOBUFS;
3d1e8704	207	}
f5f937fb	208	COMMAND(mpath, new, "<destination MAC address> next_hop <next hop MAC address>",
70cf4544 JB	209	NL80211_CMD_NEW_MPATH, 0, CIB_NETDEV, handle_mpath_set,
70cf4544 JB	210	"Create a new mesh path (instead of relying on automatic discovery).");
f5f937fb	211	COMMAND(mpath, set, "<destination MAC address> next_hop <next hop MAC address>",
70cf4544 JB	212	NL80211_CMD_SET_MPATH, 0, CIB_NETDEV, handle_mpath_set,
70cf4544 JB	213	"Set an existing mesh path's next hop.");
3d1e8704	214
7c37a24d	215	static int handle_mpath_dump(struct nl80211_state *state,
f5f937fb	216	struct nl_msg *msg,
05514f95 JB	217	int argc, char **argv,
05514f95 JB	218	enum id_input id)
3d1e8704	219	{
e1fa918a	220	printf("DEST ADDR NEXT HOP IFACE\tSN\tMETRIC\tQLEN\t"
794c1e00	221	"EXPTIME\t\tDTIM\tDRET\tFLAGS\n");
34b23014	222	register_handler(print_mpath_handler, NULL);
70391ccf	223	return 0;
3d1e8704	224	}
f5f937fb	225	COMMAND(mpath, dump, NULL,
70cf4544 JB	226	NL80211_CMD_GET_MPATH, NLM_F_DUMP, CIB_NETDEV, handle_mpath_dump,
70cf4544 JB	227	"List known mesh paths.");