[thirdparty/iw.git] / scan.c

#include <net/if.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <stdbool.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"

struct scan_params {
	bool unknown;
};

static int handle_scan(struct nl80211_state *state,
		       struct nl_cb *cb,
		       struct nl_msg *msg,
		       int argc, char **argv)
{
	struct nl_msg *ssids = NULL;
	int err = -ENOBUFS;

	ssids = nlmsg_alloc();
	if (!ssids)
		return -ENOMEM;
	NLA_PUT(ssids, 1, 0, "");
	nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);

	err = 0;
 nla_put_failure:
	nlmsg_free(ssids);
	return err;
}
COMMAND(scan, trigger, NULL,
	NL80211_CMD_TRIGGER_SCAN, 0, CIB_NETDEV, handle_scan);

typedef void (*printfn)(unsigned char type, unsigned char len, unsigned char *data);

static void print_ssid(unsigned char type, unsigned char len, unsigned char *data)
{
	int i;
	printf("\tSSID: ");
	for (i=0; i<len; i++) {
		if (isprint(data[i]))
			printf("%c", data[i]);
		else
			printf("\\x%.2x", data[i]);
	}
	printf("\n");
}

static void print_supprates(unsigned char type, unsigned char len, unsigned char *data)
{
	int i;

	if (type == 1)
		printf("\tSupported rates: ");
	else
		printf("\tExtended supported rates: ");

	for (i=0; i<len; i++) {
		int r = data[i] & 0x7f;
		printf("%d.%d%s ", r/2, 5*(r&1), data[i] & 0x80 ? "*":"");
	}
	printf("\n");
}

static void print_ds(unsigned char type, unsigned char len, unsigned char *data)
{
	printf("\tDS Parameter set: channel %d\n", data[0]);
}

static void print_ign(unsigned char type, unsigned char len, unsigned char *data)
{
	/* ignore for now, not too useful */
}

static void print_erp(unsigned char type, unsigned char len, unsigned char *data)
{
	if (data[0] == 0x00)
		return;

	printf("\tERP:");
	if (data[0] & 0x01)
		printf(" NonERP_Present");
	if (data[0] & 0x02)
		printf(" Use_Protection");
	if (data[0] & 0x04)
		printf(" Barker_Preamble_Mode");
	printf("\n");
}

static const printfn ieprinters[] = {
	[0] = print_ssid,
	[1] = print_supprates,
	[3] = print_ds,
	[5] = print_ign,
	[42] = print_erp,
	[50] = print_supprates,
};

static void tab_on_first(bool *first)
{
	if (!*first)
		printf("\t");
	else
		*first = false;
}

static void print_wifi_wps(unsigned char type, unsigned char len, unsigned char *data)
{
	bool first = true;
	__u16 subtype, sublen;

	printf("\tWPS:");

	while (len >= 4) {
		subtype = (data[0] << 8) + data[1];
		sublen = (data[2] << 8) + data[3];
		if (sublen > len)
			break;

		switch (subtype) {
		case 0x104a:
			tab_on_first(&first);
			printf("\t * Version: %#.2x\n", data[4]);
			break;
		case 0x1011:
			tab_on_first(&first);
			printf("\t * Device name: %.*s\n", sublen, data + 4);
			break;
		case 0x1021:
			tab_on_first(&first);
			printf("\t * Manufacturer: %.*s\n", sublen, data + 4);
			break;
		case 0x1023:
			tab_on_first(&first);
			printf("\t * Model: %.*s\n", sublen, data + 4);
			break;
		case 0x1057: {
			__u16 val = (data[4] << 8) | data[5];
			tab_on_first(&first);
			printf("\t * AP setup locked: 0x%.4x\n", val);
			break;
		}
		case 0x1008: {
			__u16 meth = (data[4] << 8) + data[5];
			bool comma = false;
			tab_on_first(&first);
			printf("\t * Config methods:");
#define T(bit, name) do {		\
	if (meth & (1<<bit)) {		\
		if (comma)		\
			printf(",");	\
		comma = true;		\
		printf(" " name);	\
	} } while (0)
			T(0, "USB");
			T(1, "Ethernet");
			T(2, "Label");
			T(3, "Display");
			T(4, "Ext. NFC");
			T(5, "Int. NFC");
			T(6, "NFC Intf.");
			T(7, "PBC");
			T(8, "Keypad");
			printf("\n");
			break;
#undef T
		}
		default:
			break;
		}

		data += sublen + 4;
		len -= sublen + 4;
	}

	if (len != 0) {
		printf("\t\t * bogus tail data (%d):", len);
		while (len) {
			printf(" %.2x", *data);
			data++;
			len--;
		}
		printf("\n");
	}
}

static const printfn wifiprinters[] = {
	[4] = print_wifi_wps,
};

static void print_vendor(unsigned char len, unsigned char *data,
			 struct scan_params *params)
{
	int i;

	if (len < 3) {
		printf("\tVendor specific: <too short> data:");
		for(i = 0; i < len; i++)
			printf(" %.02x", data[i]);
		printf("\n");
		return;
	}

	if (len >= 4 && data[0] == 0x00 && data[1] == 0x50 && data[2] == 0xF2) {
		if (data[3] < ARRAY_SIZE(wifiprinters) && wifiprinters[data[3]])
			return wifiprinters[data[3]](data[3], len - 4, data + 4);
		if (!params->unknown)
			return;
		printf("\tWiFi OUI %#.2x data:", data[3]);
		for(i = 0; i < len - 4; i++)
			printf(" %.02x", data[i + 4]);
		printf("\n");
		return;
	}

	if (!params->unknown)
		return;

	printf("\tVendor specific: OUI %.2x:%.2x:%.2x, data:",
		data[0], data[1], data[2]);
	for (i = 3; i < len; i++)
		printf(" %.2x", data[i]);
	printf("\n");
}

static void print_ies(unsigned char *ie, int ielen, struct scan_params *params)
{
	while (ielen >= 2 && ielen >= ie[1]) {
		if (ie[0] < ARRAY_SIZE(ieprinters) && ieprinters[ie[0]]) {
			ieprinters[ie[0]](ie[0], ie[1], ie + 2);
		} else if (ie[0] == 221 /* vendor */) {
			print_vendor(ie[1], ie + 2, params);
		} else if (params->unknown) {
			int i;

			printf("\tUnknown IE (%d):", ie[0]);
			for (i=0; i<ie[1]; i++)
				printf(" %.2x", ie[2+i]);
			printf("\n");
		}
		ielen -= ie[1] + 2;
		ie += ie[1] + 2;
	}
}

static int print_bss_handler(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *bss[NL80211_BSS_MAX + 1];
	char mac_addr[20], dev[20];
	static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
		[NL80211_BSS_TSF] = { .type = NLA_U64 },
		[NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
		[NL80211_BSS_BSSID] = { },
		[NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
		[NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
		[NL80211_BSS_INFORMATION_ELEMENTS] = { },
		[NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
		[NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
	};

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

	if (!tb[NL80211_ATTR_BSS]) {
		fprintf(stderr, "bss info missing!");
		return NL_SKIP;
	}
	if (nla_parse_nested(bss, NL80211_BSS_MAX,
			     tb[NL80211_ATTR_BSS],
			     bss_policy)) {
		fprintf(stderr, "failed to parse nested attributes!");
		return NL_SKIP;
	}

	if (!bss[NL80211_BSS_BSSID])
		return NL_SKIP;

	mac_addr_n2a(mac_addr, nla_data(bss[NL80211_BSS_BSSID]));
	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
	printf("BSS %s (on %s)\n", mac_addr, dev);

	if (bss[NL80211_BSS_TSF]) {
		unsigned long long tsf;
		tsf = (unsigned long long)nla_get_u64(bss[NL80211_BSS_TSF]);
		printf("\tTSF: %llu usec (%llud, %.2lld:%.2llu:%.2llu)\n",
			tsf, tsf/1000/1000/60/60/24, (tsf/1000/1000/60/60) % 24,
			(tsf/1000/1000/60) % 60, (tsf/1000/1000) % 60);
	}
	if (bss[NL80211_BSS_FREQUENCY])
		printf("\tfreq: %d\n",
			nla_get_u32(bss[NL80211_BSS_FREQUENCY]));
	if (bss[NL80211_BSS_BEACON_INTERVAL])
		printf("\tbeacon interval: %d\n",
			nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]));
	if (bss[NL80211_BSS_CAPABILITY])
		printf("\tcapability: 0x%.4x\n",
			nla_get_u16(bss[NL80211_BSS_CAPABILITY]));
	if (bss[NL80211_BSS_SIGNAL_MBM]) {
		int s = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
		printf("\tsignal: %d.%.2d dBm\n", s/100, s%100);
	}
	if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
		unsigned char s = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
		printf("\tsignal: %d/100\n", s);
	}
	if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
		print_ies(nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
			  nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
			  arg);

	return NL_SKIP;
}

static struct scan_params scan_params;

static int handle_scan_dump(struct nl80211_state *state,
			    struct nl_cb *cb,
			    struct nl_msg *msg,
			    int argc, char **argv)
{
	if (argc > 1)
		return 1;

	scan_params.unknown = false;
	if (argc == 1 && !strcmp(argv[0], "-u"))
		scan_params.unknown = true;

	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_bss_handler,
		  &scan_params);
	return 0;
}
COMMAND(scan, dump, "[-u]",
	NL80211_CMD_GET_SCAN, NLM_F_DUMP, CIB_NETDEV, handle_scan_dump);

static int handle_scan_combined(struct nl80211_state *state,
				struct nl_cb *cb,
				struct nl_msg *msg,
				int argc, char **argv)
{
	static char *trig_argv[] = {
		NULL,
		"scan",
		"trigger",
	};
	static char *dump_argv[] = {
		NULL,
		"scan",
		"dump",
		NULL,
	};
	static const __u32 cmds[] = {
		NL80211_CMD_NEW_SCAN_RESULTS,
		NL80211_CMD_SCAN_ABORTED,
	};
	int dump_argc, err;

	trig_argv[0] = argv[0];
	err = handle_cmd(state, II_NETDEV, ARRAY_SIZE(trig_argv), trig_argv);
	if (err)
		return err;

	/*
	 * WARNING: DO NOT COPY THIS CODE INTO YOUR APPLICATION
	 *
	 * This code has a bug, which requires creating a separate
	 * nl80211 socket to fix:
	 * It is possible for a NL80211_CMD_NEW_SCAN_RESULTS or
	 * NL80211_CMD_SCAN_ABORTED message to be sent by the kernel
	 * before (!) we listen to it, because we only start listening
	 * after we send our scan request.
	 *
	 * Doing it the other way around has a race condition as well,
	 * if you first open the events socket you may get a notification
	 * for a previous scan.
	 *
	 * The only proper way to fix this would be to listen to events
	 * before sending the command, and for the kernel to send the
	 * scan request along with the event, so that you can match up
	 * whether the scan you requested was finished or aborted (this
	 * may result in processing a scan that another application
	 * requested, but that doesn't seem to be a problem).
	 *
	 * Alas, the kernel doesn't do that (yet).
	 */

	if (listen_events(state, ARRAY_SIZE(cmds), cmds) ==
					NL80211_CMD_SCAN_ABORTED) {
		printf("scan aborted!\n");
		return 0;
	}

	if (argc == 3 && !strcmp(argv[2], "-u")) {
		dump_argc = 4;
		dump_argv[3] = "-u";
	} else
		dump_argc = 3;

	dump_argv[0] = argv[0];
	return handle_cmd(state, II_NETDEV, dump_argc, dump_argv);
}
TOPLEVEL(scan, "[-u]", 0, 0, CIB_NETDEV, handle_scan_combined);
Commit	Line	Data
3563f4c5 JB	1	#include <net/if.h>
	2	#include <errno.h>
	3	#include <string.h>
	4	#include <ctype.h>
764fe753	5	#include <stdbool.h>
3563f4c5 JB	6
	7	#include <netlink/genl/genl.h>
	8	#include <netlink/genl/family.h>
	9	#include <netlink/genl/ctrl.h>
	10	#include <netlink/msg.h>
	11	#include <netlink/attr.h>
	12
	13	#include "nl80211.h"
	14	#include "iw.h"
	15
764fe753 JB	16	struct scan_params {
	17	bool unknown;
	18	};
	19
7c37a24d JB	20	static int handle_scan(struct nl80211_state *state,
7c37a24d JB	21	struct nl_cb *cb,
3563f4c5 JB	22	struct nl_msg *msg,
	23	int argc, char **argv)
	24	{
	25	struct nl_msg *ssids = NULL;
	26	int err = -ENOBUFS;
	27
	28	ssids = nlmsg_alloc();
	29	if (!ssids)
	30	return -ENOMEM;
	31	NLA_PUT(ssids, 1, 0, "");
	32	nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
	33
	34	err = 0;
	35	nla_put_failure:
	36	nlmsg_free(ssids);
	37	return err;
	38	}
	39	COMMAND(scan, trigger, NULL,
	40	NL80211_CMD_TRIGGER_SCAN, 0, CIB_NETDEV, handle_scan);
	41
	42	typedef void (printfn)(unsigned char type, unsigned char len, unsigned char data);
	43
	44	static void print_ssid(unsigned char type, unsigned char len, unsigned char *data)
	45	{
	46	int i;
	47	printf("\tSSID: ");
	48	for (i=0; i<len; i++) {
	49	if (isprint(data[i]))
	50	printf("%c", data[i]);
	51	else
	52	printf("\\x%.2x", data[i]);
	53	}
	54	printf("\n");
	55	}
	56
	57	static void print_supprates(unsigned char type, unsigned char len, unsigned char *data)
	58	{
	59	int i;
	60
	61	if (type == 1)
	62	printf("\tSupported rates: ");
	63	else
	64	printf("\tExtended supported rates: ");
	65
	66	for (i=0; i<len; i++) {
	67	int r = data[i] & 0x7f;
	68	printf("%d.%d%s ", r/2, 5(r&1), data[i] & 0x80 ? "":"");
	69	}
	70	printf("\n");
	71	}
	72
	73	static void print_ds(unsigned char type, unsigned char len, unsigned char *data)
	74	{
	75	printf("\tDS Parameter set: channel %d\n", data[0]);
	76	}
	77
	78	static void print_ign(unsigned char type, unsigned char len, unsigned char *data)
	79	{
	80	/* ignore for now, not too useful */
	81	}
	82
fc4d1484 MH	83	static void print_erp(unsigned char type, unsigned char len, unsigned char *data)
	84	{
	85	if (data[0] == 0x00)
	86	return;
	87
	88	printf("\tERP:");
	89	if (data[0] & 0x01)
	90	printf(" NonERP_Present");
	91	if (data[0] & 0x02)
	92	printf(" Use_Protection");
	93	if (data[0] & 0x04)
	94	printf(" Barker_Preamble_Mode");
	95	printf("\n");
	96	}
	97
764fe753 JB	98	static const printfn ieprinters[] = {
	99	[0] = print_ssid,
	100	[1] = print_supprates,
	101	[3] = print_ds,
	102	[5] = print_ign,
fc4d1484	103	[42] = print_erp,
764fe753 JB	104	[50] = print_supprates,
	105	};
	106
4673a894 JB	107	static void tab_on_first(bool *first)
	108	{
	109	if (!*first)
	110	printf("\t");
	111	else
	112	*first = false;
	113	}
	114
	115	static void print_wifi_wps(unsigned char type, unsigned char len, unsigned char *data)
	116	{
	117	bool first = true;
	118	__u16 subtype, sublen;
	119
	120	printf("\tWPS:");
	121
	122	while (len >= 4) {
	123	subtype = (data[0] << 8) + data[1];
	124	sublen = (data[2] << 8) + data[3];
	125	if (sublen > len)
	126	break;
	127
	128	switch (subtype) {
	129	case 0x104a:
	130	tab_on_first(&first);
	131	printf("\t * Version: %#.2x\n", data[4]);
	132	break;
	133	case 0x1011:
	134	tab_on_first(&first);
	135	printf("\t * Device name: %.*s\n", sublen, data + 4);
	136	break;
	137	case 0x1021:
	138	tab_on_first(&first);
	139	printf("\t * Manufacturer: %.*s\n", sublen, data + 4);
	140	break;
	141	case 0x1023:
	142	tab_on_first(&first);
	143	printf("\t * Model: %.*s\n", sublen, data + 4);
	144	break;
7ee5a865 JB	145	case 0x1057: {
	146	__u16 val = (data[4] << 8) \| data[5];
	147	tab_on_first(&first);
	148	printf("\t * AP setup locked: 0x%.4x\n", val);
	149	break;
	150	}
4673a894 JB	151	case 0x1008: {
	152	__u16 meth = (data[4] << 8) + data[5];
	153	bool comma = false;
	154	tab_on_first(&first);
	155	printf("\t * Config methods:");
	156	#define T(bit, name) do { \
	157	if (meth & (1<<bit)) { \
	158	if (comma) \
	159	printf(","); \
	160	comma = true; \
	161	printf(" " name); \
	162	} } while (0)
	163	T(0, "USB");
	164	T(1, "Ethernet");
	165	T(2, "Label");
	166	T(3, "Display");
	167	T(4, "Ext. NFC");
	168	T(5, "Int. NFC");
	169	T(6, "NFC Intf.");
	170	T(7, "PBC");
	171	T(8, "Keypad");
	172	printf("\n");
	173	break;
	174	#undef T
	175	}
	176	default:
	177	break;
	178	}
	179
	180	data += sublen + 4;
	181	len -= sublen + 4;
	182	}
	183
	184	if (len != 0) {
	185	printf("\t\t * bogus tail data (%d):", len);
	186	while (len) {
	187	printf(" %.2x", *data);
	188	data++;
	189	len--;
	190	}
	191	printf("\n");
	192	}
	193	}
	194
	195	static const printfn wifiprinters[] = {
	196	[4] = print_wifi_wps,
	197	};
	198
764fe753 JB	199	static void print_vendor(unsigned char len, unsigned char *data,
764fe753 JB	200	struct scan_params *params)
3563f4c5 JB	201	{
	202	int i;
	203
fbf80af5	204	if (len < 3) {
4673a894	205	printf("\tVendor specific: <too short> data:");
fbf80af5 JB	206	for(i = 0; i < len; i++)
	207	printf(" %.02x", data[i]);
	208	printf("\n");
	209	return;
	210	}
	211
4673a894 JB	212	if (len >= 4 && data[0] == 0x00 && data[1] == 0x50 && data[2] == 0xF2) {
	213	if (data[3] < ARRAY_SIZE(wifiprinters) && wifiprinters[data[3]])
	214	return wifiprinters[data[3]](data[3], len - 4, data + 4);
	215	if (!params->unknown)
	216	return;
	217	printf("\tWiFi OUI %#.2x data:", data[3]);
	218	for(i = 0; i < len - 4; i++)
	219	printf(" %.02x", data[i + 4]);
	220	printf("\n");
	221	return;
	222	}
	223
764fe753 JB	224	if (!params->unknown)
	225	return;
	226
fbf80af5	227	printf("\tVendor specific: OUI %.2x:%.2x:%.2x, data:",
3563f4c5	228	data[0], data[1], data[2]);
fbf80af5 JB	229	for (i = 3; i < len; i++)
fbf80af5 JB	230	printf(" %.2x", data[i]);
3563f4c5 JB	231	printf("\n");
	232	}
	233
764fe753	234	static void print_ies(unsigned char ie, int ielen, struct scan_params params)
3563f4c5 JB	235	{
3563f4c5 JB	236	while (ielen >= 2 && ielen >= ie[1]) {
97ebbaf5	237	if (ie[0] < ARRAY_SIZE(ieprinters) && ieprinters[ie[0]]) {
3563f4c5	238	ieprinters[ie[0]](ie[0], ie[1], ie + 2);
764fe753 JB	239	} else if (ie[0] == 221 /* vendor */) {
	240	print_vendor(ie[1], ie + 2, params);
	241	} else if (params->unknown) {
3563f4c5 JB	242	int i;
3563f4c5 JB	243
8086b700	244	printf("\tUnknown IE (%d):", ie[0]);
3563f4c5	245	for (i=0; i<ie[1]; i++)
8086b700	246	printf(" %.2x", ie[2+i]);
3563f4c5 JB	247	printf("\n");
	248	}
	249	ielen -= ie[1] + 2;
	250	ie += ie[1] + 2;
	251	}
	252	}
	253
	254	static int print_bss_handler(struct nl_msg msg, void arg)
	255	{
	256	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	257	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	258	struct nlattr *bss[NL80211_BSS_MAX + 1];
	259	char mac_addr[20], dev[20];
	260	static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
	261	[NL80211_BSS_TSF] = { .type = NLA_U64 },
	262	[NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
	263	[NL80211_BSS_BSSID] = { },
	264	[NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
	265	[NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
	266	[NL80211_BSS_INFORMATION_ELEMENTS] = { },
f2e17e1f JB	267	[NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
f2e17e1f JB	268	[NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
3563f4c5 JB	269	};
	270
	271	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
	272	genlmsg_attrlen(gnlh, 0), NULL);
	273
	274	if (!tb[NL80211_ATTR_BSS]) {
	275	fprintf(stderr, "bss info missing!");
	276	return NL_SKIP;
	277	}
	278	if (nla_parse_nested(bss, NL80211_BSS_MAX,
	279	tb[NL80211_ATTR_BSS],
	280	bss_policy)) {
	281	fprintf(stderr, "failed to parse nested attributes!");
	282	return NL_SKIP;
	283	}
	284
	285	if (!bss[NL80211_BSS_BSSID])
	286	return NL_SKIP;
	287
	288	mac_addr_n2a(mac_addr, nla_data(bss[NL80211_BSS_BSSID]));
	289	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
	290	printf("BSS %s (on %s)\n", mac_addr, dev);
	291
e7109a8a JB	292	if (bss[NL80211_BSS_TSF]) {
	293	unsigned long long tsf;
	294	tsf = (unsigned long long)nla_get_u64(bss[NL80211_BSS_TSF]);
	295	printf("\tTSF: %llu usec (%llud, %.2lld:%.2llu:%.2llu)\n",
	296	tsf, tsf/1000/1000/60/60/24, (tsf/1000/1000/60/60) % 24,
	297	(tsf/1000/1000/60) % 60, (tsf/1000/1000) % 60);
	298	}
3563f4c5 JB	299	if (bss[NL80211_BSS_FREQUENCY])
	300	printf("\tfreq: %d\n",
	301	nla_get_u32(bss[NL80211_BSS_FREQUENCY]));
	302	if (bss[NL80211_BSS_BEACON_INTERVAL])
	303	printf("\tbeacon interval: %d\n",
	304	nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]));
	305	if (bss[NL80211_BSS_CAPABILITY])
	306	printf("\tcapability: 0x%.4x\n",
	307	nla_get_u16(bss[NL80211_BSS_CAPABILITY]));
f2e17e1f JB	308	if (bss[NL80211_BSS_SIGNAL_MBM]) {
	309	int s = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
	310	printf("\tsignal: %d.%.2d dBm\n", s/100, s%100);
	311	}
	312	if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
	313	unsigned char s = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
	314	printf("\tsignal: %d/100\n", s);
	315	}
3563f4c5 JB	316	if (bss[NL80211_BSS_INFORMATION_ELEMENTS])
3563f4c5 JB	317	print_ies(nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
764fe753 JB	318	nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]),
764fe753 JB	319	arg);
3563f4c5 JB	320
	321	return NL_SKIP;
	322	}
	323
764fe753	324	static struct scan_params scan_params;
3563f4c5	325
7c37a24d JB	326	static int handle_scan_dump(struct nl80211_state *state,
7c37a24d JB	327	struct nl_cb *cb,
3563f4c5 JB	328	struct nl_msg *msg,
	329	int argc, char **argv)
	330	{
764fe753 JB	331	if (argc > 1)
	332	return 1;
	333
	334	scan_params.unknown = false;
	335	if (argc == 1 && !strcmp(argv[0], "-u"))
	336	scan_params.unknown = true;
	337
	338	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_bss_handler,
	339	&scan_params);
3563f4c5 JB	340	return 0;
3563f4c5 JB	341	}
764fe753	342	COMMAND(scan, dump, "[-u]",
3563f4c5	343	NL80211_CMD_GET_SCAN, NLM_F_DUMP, CIB_NETDEV, handle_scan_dump);
a5fe4ef2 JB	344
	345	static int handle_scan_combined(struct nl80211_state *state,
	346	struct nl_cb *cb,
	347	struct nl_msg *msg,
	348	int argc, char **argv)
	349	{
	350	static char *trig_argv[] = {
	351	NULL,
	352	"scan",
	353	"trigger",
	354	};
	355	static char *dump_argv[] = {
	356	NULL,
	357	"scan",
	358	"dump",
92649eab	359	NULL,
a5fe4ef2 JB	360	};
	361	static const __u32 cmds[] = {
	362	NL80211_CMD_NEW_SCAN_RESULTS,
	363	NL80211_CMD_SCAN_ABORTED,
	364	};
92649eab	365	int dump_argc, err;
a5fe4ef2 JB	366
	367	trig_argv[0] = argv[0];
	368	err = handle_cmd(state, II_NETDEV, ARRAY_SIZE(trig_argv), trig_argv);
	369	if (err)
	370	return err;
	371
61725dbe JB	372	/*
	373	* WARNING: DO NOT COPY THIS CODE INTO YOUR APPLICATION
	374	*
	375	* This code has a bug, which requires creating a separate
	376	* nl80211 socket to fix:
	377	* It is possible for a NL80211_CMD_NEW_SCAN_RESULTS or
	378	* NL80211_CMD_SCAN_ABORTED message to be sent by the kernel
	379	* before (!) we listen to it, because we only start listening
	380	* after we send our scan request.
	381	*
	382	* Doing it the other way around has a race condition as well,
	383	* if you first open the events socket you may get a notification
	384	* for a previous scan.
	385	*
	386	* The only proper way to fix this would be to listen to events
	387	* before sending the command, and for the kernel to send the
	388	* scan request along with the event, so that you can match up
	389	* whether the scan you requested was finished or aborted (this
	390	* may result in processing a scan that another application
	391	* requested, but that doesn't seem to be a problem).
	392	*
	393	* Alas, the kernel doesn't do that (yet).
	394	*/
	395
a5fe4ef2 JB	396	if (listen_events(state, ARRAY_SIZE(cmds), cmds) ==
	397	NL80211_CMD_SCAN_ABORTED) {
	398	printf("scan aborted!\n");
	399	return 0;
	400	}
	401
92649eab MH	402	if (argc == 3 && !strcmp(argv[2], "-u")) {
	403	dump_argc = 4;
	404	dump_argv[3] = "-u";
	405	} else
	406	dump_argc = 3;
	407
a5fe4ef2	408	dump_argv[0] = argv[0];
92649eab	409	return handle_cmd(state, II_NETDEV, dump_argc, dump_argv);
a5fe4ef2	410	}
92649eab	411	TOPLEVEL(scan, "[-u]", 0, 0, CIB_NETDEV, handle_scan_combined);