[thirdparty/iw.git] / event.c

#include <stdint.h>
#include <stdbool.h>
#include <net/if.h>
#include <errno.h>
#include "iw.h"

static int no_seq_check(struct nl_msg *msg, void *arg)
{
	return NL_OK;
}

struct ieee80211_beacon_channel {
	__u16 center_freq;
	bool passive_scan;
	bool no_ibss;
};

static int parse_beacon_hint_chan(struct nlattr *tb,
				  struct ieee80211_beacon_channel *chan)
{
	struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
	static struct nla_policy beacon_freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
		[NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
		[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
		[NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
	};

	if (nla_parse_nested(tb_freq,
			     NL80211_FREQUENCY_ATTR_MAX,
			     tb,
			     beacon_freq_policy))
		return -EINVAL;

	chan->center_freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);

	if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
		chan->passive_scan = true;
	if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
		chan->no_ibss = true;

	return 0;
}

static void print_frame(struct print_event_args *args, struct nlattr *attr)
{
	uint8_t *frame;
	size_t len;
	int i;
	char macbuf[6*3];
	uint16_t tmp;

	if (!attr)
		printf(" [no frame]");

	frame = nla_data(attr);
	len = nla_len(attr);

	if (len < 26) {
		printf(" [invalid frame: ");
		goto print_frame;
	}

	mac_addr_n2a(macbuf, frame + 10);
	printf(" %s -> ", macbuf);
	mac_addr_n2a(macbuf, frame + 4);
	printf("%s", macbuf);

	switch (frame[0] & 0xfc) {
	case 0x10: /* assoc resp */
	case 0x30: /* reassoc resp */
		/* status */
		tmp = (frame[27] << 8) + frame[26];
		printf(" status: %d: %s", tmp, get_status_str(tmp));
		break;
	case 0x00: /* assoc req */
	case 0x20: /* reassoc req */
		break;
	case 0xb0: /* auth */
		/* status */
		tmp = (frame[29] << 8) + frame[28];
		printf(" status: %d: %s", tmp, get_status_str(tmp));
		break;
		break;
	case 0xa0: /* disassoc */
	case 0xc0: /* deauth */
		/* reason */
		tmp = (frame[25] << 8) + frame[24];
		printf(" reason %d: %s", tmp, get_reason_str(tmp));
		break;
	}

	if (!args->frame)
		return;

	printf(" [frame:");

 print_frame:
	for (i = 0; i < len; i++)
		printf(" %.02x", frame[i]);
	printf("]");
}

static void parse_cqm_event(struct nlattr **attrs)
{
	static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
		[NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
		[NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
		[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
	};
	struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
	struct nlattr *cqm_attr = attrs[NL80211_ATTR_CQM];

	printf("connection quality monitor event: ");

	if (!cqm_attr ||
	    nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, cqm_attr, cqm_policy)) {
		printf("missing data!\n");
		return;
	}

	if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]) {
		enum nl80211_cqm_rssi_threshold_event rssi_event;
		rssi_event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
		if (rssi_event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH)
			printf("RSSI went above threshold\n");
		else
			printf("RSSI went below threshold\n");
	} else if (cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT] &&
		   attrs[NL80211_ATTR_MAC]) {
		uint32_t frames;
		char buf[3*6];

		frames = nla_get_u32(cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT]);
		mac_addr_n2a(buf, nla_data(attrs[NL80211_ATTR_MAC]));
		printf("peer %s didn't ACK %d packets\n", buf, frames);
	} else
		printf("unknown event\n");
}


static int print_event(struct nl_msg *msg, void *arg)
{
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *tb[NL80211_ATTR_MAX + 1], *nst;
	struct print_event_args *args = arg;
	char ifname[100];
	char macbuf[6*3];
	__u8 reg_type;
	struct ieee80211_beacon_channel chan_before_beacon,  chan_after_beacon;
	__u32 wiphy_idx = 0;
	int rem_nst;
	__u16 status;

	if (args->time || args->reltime) {
		unsigned long long usecs, previous;

		previous = 1000000ULL * args->ts.tv_sec + args->ts.tv_usec;
		gettimeofday(&args->ts, NULL);
		usecs = 1000000ULL * args->ts.tv_sec + args->ts.tv_usec;
		if (args->reltime) {
			if (!args->have_ts) {
				usecs = 0;
				args->have_ts = true;
			} else
				usecs -= previous;
		}
		printf("%llu.%06llu: ", usecs/1000000, usecs % 1000000);
	}

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

	if (tb[NL80211_ATTR_IFINDEX] && tb[NL80211_ATTR_WIPHY]) {
		if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
		printf("%s (phy #%d): ", ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	} else if (tb[NL80211_ATTR_IFINDEX]) {
		if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
		printf("%s: ", ifname);
	} else if (tb[NL80211_ATTR_WIPHY]) {
		printf("phy #%d: ", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	}

	switch (gnlh->cmd) {
	case NL80211_CMD_NEW_WIPHY:
		printf("renamed to %s\n", nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]));
		break;
	case NL80211_CMD_TRIGGER_SCAN:
		printf("scan started\n");
		break;
	case NL80211_CMD_NEW_SCAN_RESULTS:
		printf("scan finished:");
	case NL80211_CMD_SCAN_ABORTED:
		if (gnlh->cmd == NL80211_CMD_SCAN_ABORTED)
			printf("scan aborted:");
		if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
			nla_for_each_nested(nst, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem_nst)
				printf(" %d", nla_get_u32(nst));
			printf(",");
		}
		if (tb[NL80211_ATTR_SCAN_SSIDS]) {
			nla_for_each_nested(nst, tb[NL80211_ATTR_SCAN_SSIDS], rem_nst) {
				printf(" \"");
				print_ssid_escaped(nla_len(nst), nla_data(nst));
				printf("\"");
			}
		}
		printf("\n");
		break;
	case NL80211_CMD_REG_CHANGE:
		printf("regulatory domain change: ");

		reg_type = nla_get_u8(tb[NL80211_ATTR_REG_TYPE]);

		switch (reg_type) {
		case NL80211_REGDOM_TYPE_COUNTRY:
			printf("set to %s by %s request",
			       nla_get_string(tb[NL80211_ATTR_REG_ALPHA2]),
			       reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
			if (tb[NL80211_ATTR_WIPHY])
				printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
			break;
		case NL80211_REGDOM_TYPE_WORLD:
			printf("set to world roaming by %s request",
			       reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
			break;
		case NL80211_REGDOM_TYPE_CUSTOM_WORLD:
			printf("custom world roaming rules in place on phy%d by %s request",
			       nla_get_u32(tb[NL80211_ATTR_WIPHY]),
			       reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
			break;
		case NL80211_REGDOM_TYPE_INTERSECTION:
			printf("intersection used due to a request made by %s",
			       reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
			if (tb[NL80211_ATTR_WIPHY])
				printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
			break;
		default:
			printf("unknown source (upgrade this utility)");
			break;
		}

		printf("\n");
		break;
	case NL80211_CMD_REG_BEACON_HINT:

		wiphy_idx = nla_get_u32(tb[NL80211_ATTR_WIPHY]);

		memset(&chan_before_beacon, 0, sizeof(chan_before_beacon));
		memset(&chan_after_beacon, 0, sizeof(chan_after_beacon));

		if (parse_beacon_hint_chan(tb[NL80211_ATTR_FREQ_BEFORE],
					   &chan_before_beacon))
			break;
		if (parse_beacon_hint_chan(tb[NL80211_ATTR_FREQ_AFTER],
					   &chan_after_beacon))
			break;

		if (chan_before_beacon.center_freq != chan_after_beacon.center_freq)
			break;

		/* A beacon hint is sent _only_ if something _did_ change */
		printf("beacon hint:\n");

		printf("phy%d %d MHz [%d]:\n",
		       wiphy_idx,
		       chan_before_beacon.center_freq,
		       ieee80211_frequency_to_channel(chan_before_beacon.center_freq));

		if (chan_before_beacon.passive_scan && !chan_after_beacon.passive_scan)
			printf("\to active scanning enabled\n");
		if (chan_before_beacon.no_ibss && !chan_after_beacon.no_ibss)
			printf("\to beaconing enabled\n");

		break;
	case NL80211_CMD_NEW_STATION:
		mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
		printf("new station %s\n", macbuf);
		break;
	case NL80211_CMD_JOIN_IBSS:
		mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
		printf("IBSS %s joined\n", macbuf);
		break;
	case NL80211_CMD_AUTHENTICATE:
		printf("auth");
		if (tb[NL80211_ATTR_FRAME])
			print_frame(args, tb[NL80211_ATTR_FRAME]);
		else if (tb[NL80211_ATTR_TIMED_OUT])
			printf(": timed out");
		else
			printf(": unknown event");
		printf("\n");
		break;
	case NL80211_CMD_ASSOCIATE:
		printf("assoc");
		if (tb[NL80211_ATTR_FRAME])
			print_frame(args, tb[NL80211_ATTR_FRAME]);
		else if (tb[NL80211_ATTR_TIMED_OUT])
			printf(": timed out");
		else
			printf(": unknown event");
		printf("\n");
		break;
	case NL80211_CMD_DEAUTHENTICATE:
		printf("deauth");
		print_frame(args, tb[NL80211_ATTR_FRAME]);
		printf("\n");
		break;
	case NL80211_CMD_DISASSOCIATE:
		printf("disassoc");
		print_frame(args, tb[NL80211_ATTR_FRAME]);
		printf("\n");
		break;
	case NL80211_CMD_UNPROT_DEAUTHENTICATE:
		printf("unprotected deauth");
		print_frame(args, tb[NL80211_ATTR_FRAME]);
		printf("\n");
		break;
	case NL80211_CMD_UNPROT_DISASSOCIATE:
		printf("unprotected disassoc");
		print_frame(args, tb[NL80211_ATTR_FRAME]);
		printf("\n");
		break;
	case NL80211_CMD_CONNECT:
		status = 0;
		if (!tb[NL80211_ATTR_STATUS_CODE])
			printf("unknown connect status");
		else if (nla_get_u16(tb[NL80211_ATTR_STATUS_CODE]) == 0)
			printf("connected");
		else {
			status = nla_get_u16(tb[NL80211_ATTR_STATUS_CODE]);
			printf("failed to connect");
		}
		if (tb[NL80211_ATTR_MAC]) {
			mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
			printf(" to %s", macbuf);
		}
		if (status)
			printf(", status: %d: %s", status, get_status_str(status));
		printf("\n");
		break;
	case NL80211_CMD_ROAM:
		printf("roamed");
		if (tb[NL80211_ATTR_MAC]) {
			mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
			printf(" to %s", macbuf);
		}
		printf("\n");
		break;
	case NL80211_CMD_DISCONNECT:
		printf("disconnected");
		if (tb[NL80211_ATTR_DISCONNECTED_BY_AP])
			printf(" (by AP)");
		else
			printf(" (local request)");
		if (tb[NL80211_ATTR_REASON_CODE])
			printf(" reason: %d: %s", nla_get_u16(tb[NL80211_ATTR_REASON_CODE]),
				get_reason_str(nla_get_u16(tb[NL80211_ATTR_REASON_CODE])));
		printf("\n");
		break;
	case NL80211_CMD_REMAIN_ON_CHANNEL:
		printf("remain on freq %d (%dms, cookie %llx)\n",
			nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
			nla_get_u32(tb[NL80211_ATTR_DURATION]),
			(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
		break;
	case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
		printf("done with remain on freq %d (cookie %llx)\n",
			nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
			(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
		break;
	case NL80211_CMD_NOTIFY_CQM:
		parse_cqm_event(tb);
		break;
	default:
		printf("unknown event %d\n", gnlh->cmd);
		break;
	}

	fflush(stdout);
	return NL_SKIP;
}

struct wait_event {
	int n_cmds;
	const __u32 *cmds;
	__u32 cmd;
	struct print_event_args *pargs;
};

static int wait_event(struct nl_msg *msg, void *arg)
{
	struct wait_event *wait = arg;
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	int i;

	for (i = 0; i < wait->n_cmds; i++) {
		if (gnlh->cmd == wait->cmds[i]) {
			wait->cmd = gnlh->cmd;
			if (wait->pargs)
				print_event(msg, wait->pargs);
		}
	}

	return NL_SKIP;
}

int __prepare_listen_events(struct nl80211_state *state)
{
	int mcid, ret;

	/* Configuration multicast group */
	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "config");
	if (mcid < 0)
		return mcid;

	ret = nl_socket_add_membership(state->nl_sock, mcid);
	if (ret)
		return ret;

	/* Scan multicast group */
	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "scan");
	if (mcid >= 0) {
		ret = nl_socket_add_membership(state->nl_sock, mcid);
		if (ret)
			return ret;
	}

	/* Regulatory multicast group */
	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "regulatory");
	if (mcid >= 0) {
		ret = nl_socket_add_membership(state->nl_sock, mcid);
		if (ret)
			return ret;
	}

	/* MLME multicast group */
	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "mlme");
	if (mcid >= 0) {
		ret = nl_socket_add_membership(state->nl_sock, mcid);
		if (ret)
			return ret;
	}

	return 0;
}

__u32 __do_listen_events(struct nl80211_state *state,
			 const int n_waits, const __u32 *waits,
			 struct print_event_args *args)
{
	struct nl_cb *cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
	struct wait_event wait_ev;

	if (!cb) {
		fprintf(stderr, "failed to allocate netlink callbacks\n");
		return -ENOMEM;
	}

	/* no sequence checking for multicast messages */
	nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);

	if (n_waits && waits) {
		wait_ev.cmds = waits;
		wait_ev.n_cmds = n_waits;
		wait_ev.pargs = args;
		nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, wait_event, &wait_ev);
	} else
		nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_event, args);

	wait_ev.cmd = 0;

	while (!wait_ev.cmd)
		nl_recvmsgs(state->nl_sock, cb);

	nl_cb_put(cb);

	return wait_ev.cmd;
}

__u32 listen_events(struct nl80211_state *state,
		    const int n_waits, const __u32 *waits)
{
	int ret;

	ret = __prepare_listen_events(state);
	if (ret)
		return ret;

	return __do_listen_events(state, n_waits, waits, NULL);
}

static int print_events(struct nl80211_state *state,
			struct nl_cb *cb,
			struct nl_msg *msg,
			int argc, char **argv)
{
	struct print_event_args args;
	int ret;

	memset(&args, 0, sizeof(args));

	argc--;
	argv++;

	while (argc > 0) {
		if (strcmp(argv[0], "-f") == 0)
			args.frame = true;
		else if (strcmp(argv[0], "-t") == 0)
			args.time = true;
		else if (strcmp(argv[0], "-r") == 0)
			args.reltime = true;
		else
			return 1;
		argc--;
		argv++;
	}

	if (args.time && args.reltime)
		return 1;

	if (argc)
		return 1;

	ret = __prepare_listen_events(state);
	if (ret)
		return ret;

	return __do_listen_events(state, 0, NULL, &args);
}
TOPLEVEL(event, "[-t] [-r] [-f]", 0, 0, CIB_NONE, print_events,
	"Monitor events from the kernel.\n"
	"-t - print timestamp\n"
	"-r - print relative timstamp\n"
	"-f - print full frame for auth/assoc etc.");
Commit	Line	Data
957a0f07 JB	1	#include <stdint.h>
	2	#include <stdbool.h>
	3	#include <net/if.h>
	4	#include <errno.h>
	5	#include "iw.h"
	6
	7	static int no_seq_check(struct nl_msg msg, void arg)
	8	{
	9	return NL_OK;
	10	}
	11
0168589d LR	12	struct ieee80211_beacon_channel {
	13	__u16 center_freq;
	14	bool passive_scan;
	15	bool no_ibss;
	16	};
	17
	18	static int parse_beacon_hint_chan(struct nlattr *tb,
	19	struct ieee80211_beacon_channel *chan)
	20	{
	21	struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
	22	static struct nla_policy beacon_freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
	23	[NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
	24	[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
	25	[NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
	26	};
	27
	28	if (nla_parse_nested(tb_freq,
	29	NL80211_FREQUENCY_ATTR_MAX,
	30	tb,
	31	beacon_freq_policy))
	32	return -EINVAL;
	33
	34	chan->center_freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
	35
	36	if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
	37	chan->passive_scan = true;
	38	if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
	39	chan->no_ibss = true;
	40
	41	return 0;
	42	}
	43
957a0f07 JB	44	static void print_frame(struct print_event_args args, struct nlattr attr)
	45	{
	46	uint8_t *frame;
	47	size_t len;
	48	int i;
	49	char macbuf[6*3];
	50	uint16_t tmp;
	51
	52	if (!attr)
	53	printf(" [no frame]");
	54
	55	frame = nla_data(attr);
	56	len = nla_len(attr);
	57
	58	if (len < 26) {
	59	printf(" [invalid frame: ");
	60	goto print_frame;
	61	}
	62
	63	mac_addr_n2a(macbuf, frame + 10);
	64	printf(" %s -> ", macbuf);
	65	mac_addr_n2a(macbuf, frame + 4);
	66	printf("%s", macbuf);
	67
	68	switch (frame[0] & 0xfc) {
	69	case 0x10: /* assoc resp */
	70	case 0x30: /* reassoc resp */
	71	/* status */
	72	tmp = (frame[27] << 8) + frame[26];
	73	printf(" status: %d: %s", tmp, get_status_str(tmp));
	74	break;
	75	case 0x00: /* assoc req */
	76	case 0x20: /* reassoc req */
	77	break;
	78	case 0xb0: /* auth */
	79	/* status */
	80	tmp = (frame[29] << 8) + frame[28];
	81	printf(" status: %d: %s", tmp, get_status_str(tmp));
	82	break;
	83	break;
	84	case 0xa0: /* disassoc */
	85	case 0xc0: /* deauth */
	86	/* reason */
	87	tmp = (frame[25] << 8) + frame[24];
	88	printf(" reason %d: %s", tmp, get_reason_str(tmp));
	89	break;
	90	}
	91
	92	if (!args->frame)
	93	return;
	94
	95	printf(" [frame:");
	96
	97	print_frame:
	98	for (i = 0; i < len; i++)
	99	printf(" %.02x", frame[i]);
	100	printf("]");
	101	}
	102
f19444fe	103	static void parse_cqm_event(struct nlattr **attrs)
7988b229 JO	104	{
	105	static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
	106	[NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
	107	[NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
	108	[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
	109	};
	110	struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
f19444fe	111	struct nlattr *cqm_attr = attrs[NL80211_ATTR_CQM];
7988b229 JO	112
	113	printf("connection quality monitor event: ");
	114
f19444fe JB	115	if (!cqm_attr \|\|
f19444fe JB	116	nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, cqm_attr, cqm_policy)) {
7988b229 JO	117	printf("missing data!\n");
	118	return;
	119	}
	120
	121	if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]) {
	122	enum nl80211_cqm_rssi_threshold_event rssi_event;
	123	rssi_event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
	124	if (rssi_event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH)
f19444fe	125	printf("RSSI went above threshold\n");
7988b229	126	else
f19444fe JB	127	printf("RSSI went below threshold\n");
	128	} else if (cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT] &&
	129	attrs[NL80211_ATTR_MAC]) {
	130	uint32_t frames;
	131	char buf[3*6];
	132
	133	frames = nla_get_u32(cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT]);
	134	mac_addr_n2a(buf, nla_data(attrs[NL80211_ATTR_MAC]));
	135	printf("peer %s didn't ACK %d packets\n", buf, frames);
	136	} else
	137	printf("unknown event\n");
7988b229 JO	138	}
	139
	140
957a0f07 JB	141	static int print_event(struct nl_msg msg, void arg)
	142	{
	143	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
748f8489	144	struct nlattr tb[NL80211_ATTR_MAX + 1], nst;
957a0f07 JB	145	struct print_event_args *args = arg;
	146	char ifname[100];
	147	char macbuf[6*3];
	148	__u8 reg_type;
0168589d LR	149	struct ieee80211_beacon_channel chan_before_beacon, chan_after_beacon;
0168589d LR	150	__u32 wiphy_idx = 0;
748f8489	151	int rem_nst;
f1a666a6	152	__u16 status;
957a0f07	153
981b21ad JB	154	if (args->time \|\| args->reltime) {
	155	unsigned long long usecs, previous;
	156
	157	previous = 1000000ULL * args->ts.tv_sec + args->ts.tv_usec;
	158	gettimeofday(&args->ts, NULL);
	159	usecs = 1000000ULL * args->ts.tv_sec + args->ts.tv_usec;
	160	if (args->reltime) {
	161	if (!args->have_ts) {
	162	usecs = 0;
	163	args->have_ts = true;
	164	} else
	165	usecs -= previous;
	166	}
	167	printf("%llu.%06llu: ", usecs/1000000, usecs % 1000000);
957a0f07 JB	168	}
	169
	170	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
	171	genlmsg_attrlen(gnlh, 0), NULL);
	172
	173	if (tb[NL80211_ATTR_IFINDEX] && tb[NL80211_ATTR_WIPHY]) {
	174	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
	175	printf("%s (phy #%d): ", ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	176	} else if (tb[NL80211_ATTR_IFINDEX]) {
	177	if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
	178	printf("%s: ", ifname);
	179	} else if (tb[NL80211_ATTR_WIPHY]) {
	180	printf("phy #%d: ", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	181	}
	182
	183	switch (gnlh->cmd) {
	184	case NL80211_CMD_NEW_WIPHY:
	185	printf("renamed to %s\n", nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]));
	186	break;
e67be815 JB	187	case NL80211_CMD_TRIGGER_SCAN:
	188	printf("scan started\n");
	189	break;
957a0f07	190	case NL80211_CMD_NEW_SCAN_RESULTS:
748f8489	191	printf("scan finished:");
957a0f07	192	case NL80211_CMD_SCAN_ABORTED:
748f8489 JB	193	if (gnlh->cmd == NL80211_CMD_SCAN_ABORTED)
	194	printf("scan aborted:");
	195	if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
	196	nla_for_each_nested(nst, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem_nst)
	197	printf(" %d", nla_get_u32(nst));
	198	printf(",");
	199	}
	200	if (tb[NL80211_ATTR_SCAN_SSIDS]) {
	201	nla_for_each_nested(nst, tb[NL80211_ATTR_SCAN_SSIDS], rem_nst) {
	202	printf(" \"");
	203	print_ssid_escaped(nla_len(nst), nla_data(nst));
	204	printf("\"");
	205	}
	206	}
	207	printf("\n");
957a0f07 JB	208	break;
	209	case NL80211_CMD_REG_CHANGE:
	210	printf("regulatory domain change: ");
	211
	212	reg_type = nla_get_u8(tb[NL80211_ATTR_REG_TYPE]);
	213
	214	switch (reg_type) {
	215	case NL80211_REGDOM_TYPE_COUNTRY:
	216	printf("set to %s by %s request",
	217	nla_get_string(tb[NL80211_ATTR_REG_ALPHA2]),
	218	reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
	219	if (tb[NL80211_ATTR_WIPHY])
	220	printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	221	break;
	222	case NL80211_REGDOM_TYPE_WORLD:
	223	printf("set to world roaming by %s request",
	224	reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
	225	break;
	226	case NL80211_REGDOM_TYPE_CUSTOM_WORLD:
	227	printf("custom world roaming rules in place on phy%d by %s request",
	228	nla_get_u32(tb[NL80211_ATTR_WIPHY]),
	229	reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
	230	break;
	231	case NL80211_REGDOM_TYPE_INTERSECTION:
	232	printf("intersection used due to a request made by %s",
	233	reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
	234	if (tb[NL80211_ATTR_WIPHY])
	235	printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
	236	break;
	237	default:
	238	printf("unknown source (upgrade this utility)");
	239	break;
	240	}
	241
	242	printf("\n");
0168589d LR	243	break;
	244	case NL80211_CMD_REG_BEACON_HINT:
	245
	246	wiphy_idx = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
	247
	248	memset(&chan_before_beacon, 0, sizeof(chan_before_beacon));
	249	memset(&chan_after_beacon, 0, sizeof(chan_after_beacon));
	250
ce3b2ed9 JB	251	if (parse_beacon_hint_chan(tb[NL80211_ATTR_FREQ_BEFORE],
	252	&chan_before_beacon))
	253	break;
	254	if (parse_beacon_hint_chan(tb[NL80211_ATTR_FREQ_AFTER],
	255	&chan_after_beacon))
	256	break;
0168589d LR	257
	258	if (chan_before_beacon.center_freq != chan_after_beacon.center_freq)
	259	break;
	260
	261	/* A beacon hint is sent _only_ if something _did_ change */
	262	printf("beacon hint:\n");
	263
	264	printf("phy%d %d MHz [%d]:\n",
	265	wiphy_idx,
	266	chan_before_beacon.center_freq,
	267	ieee80211_frequency_to_channel(chan_before_beacon.center_freq));
	268
	269	if (chan_before_beacon.passive_scan && !chan_after_beacon.passive_scan)
	270	printf("\to active scanning enabled\n");
	271	if (chan_before_beacon.no_ibss && !chan_after_beacon.no_ibss)
	272	printf("\to beaconing enabled\n");
	273
cec6d6a7 JB	274	break;
	275	case NL80211_CMD_NEW_STATION:
	276	mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
	277	printf("new station %s\n", macbuf);
957a0f07 JB	278	break;
	279	case NL80211_CMD_JOIN_IBSS:
	280	mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
	281	printf("IBSS %s joined\n", macbuf);
	282	break;
	283	case NL80211_CMD_AUTHENTICATE:
	284	printf("auth");
aea5dbd2 JB	285	if (tb[NL80211_ATTR_FRAME])
	286	print_frame(args, tb[NL80211_ATTR_FRAME]);
	287	else if (tb[NL80211_ATTR_TIMED_OUT])
	288	printf(": timed out");
	289	else
	290	printf(": unknown event");
957a0f07 JB	291	printf("\n");
	292	break;
	293	case NL80211_CMD_ASSOCIATE:
	294	printf("assoc");
aea5dbd2 JB	295	if (tb[NL80211_ATTR_FRAME])
	296	print_frame(args, tb[NL80211_ATTR_FRAME]);
	297	else if (tb[NL80211_ATTR_TIMED_OUT])
	298	printf(": timed out");
	299	else
	300	printf(": unknown event");
957a0f07 JB	301	printf("\n");
	302	break;
	303	case NL80211_CMD_DEAUTHENTICATE:
	304	printf("deauth");
	305	print_frame(args, tb[NL80211_ATTR_FRAME]);
	306	printf("\n");
	307	break;
	308	case NL80211_CMD_DISASSOCIATE:
	309	printf("disassoc");
	310	print_frame(args, tb[NL80211_ATTR_FRAME]);
	311	printf("\n");
	312	break;
99802e56 JB	313	case NL80211_CMD_UNPROT_DEAUTHENTICATE:
	314	printf("unprotected deauth");
	315	print_frame(args, tb[NL80211_ATTR_FRAME]);
	316	printf("\n");
	317	break;
	318	case NL80211_CMD_UNPROT_DISASSOCIATE:
	319	printf("unprotected disassoc");
	320	print_frame(args, tb[NL80211_ATTR_FRAME]);
	321	printf("\n");
	322	break;
f1a666a6 JB	323	case NL80211_CMD_CONNECT:
	324	status = 0;
	325	if (!tb[NL80211_ATTR_STATUS_CODE])
	326	printf("unknown connect status");
	327	else if (nla_get_u16(tb[NL80211_ATTR_STATUS_CODE]) == 0)
	328	printf("connected");
	329	else {
	330	status = nla_get_u16(tb[NL80211_ATTR_STATUS_CODE]);
	331	printf("failed to connect");
	332	}
	333	if (tb[NL80211_ATTR_MAC]) {
	334	mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
	335	printf(" to %s", macbuf);
	336	}
	337	if (status)
	338	printf(", status: %d: %s", status, get_status_str(status));
	339	printf("\n");
	340	break;
	341	case NL80211_CMD_ROAM:
	342	printf("roamed");
	343	if (tb[NL80211_ATTR_MAC]) {
	344	mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
	345	printf(" to %s", macbuf);
	346	}
	347	printf("\n");
	348	break;
	349	case NL80211_CMD_DISCONNECT:
	350	printf("disconnected");
	351	if (tb[NL80211_ATTR_DISCONNECTED_BY_AP])
	352	printf(" (by AP)");
	353	else
	354	printf(" (local request)");
	355	if (tb[NL80211_ATTR_REASON_CODE])
	356	printf(" reason: %d: %s", nla_get_u16(tb[NL80211_ATTR_REASON_CODE]),
	357	get_reason_str(nla_get_u16(tb[NL80211_ATTR_REASON_CODE])));
	358	printf("\n");
	359	break;
6829308d JB	360	case NL80211_CMD_REMAIN_ON_CHANNEL:
	361	printf("remain on freq %d (%dms, cookie %llx)\n",
	362	nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
	363	nla_get_u32(tb[NL80211_ATTR_DURATION]),
	364	(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
	365	break;
	366	case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
	367	printf("done with remain on freq %d (cookie %llx)\n",
	368	nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
	369	(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
	370	break;
7988b229	371	case NL80211_CMD_NOTIFY_CQM:
f19444fe	372	parse_cqm_event(tb);
7988b229	373	break;
957a0f07 JB	374	default:
	375	printf("unknown event %d\n", gnlh->cmd);
	376	break;
	377	}
	378
374e8a26	379	fflush(stdout);
957a0f07 JB	380	return NL_SKIP;
	381	}
	382
	383	struct wait_event {
	384	int n_cmds;
	385	const __u32 *cmds;
	386	__u32 cmd;
7fabd346	387	struct print_event_args *pargs;
957a0f07 JB	388	};
	389
	390	static int wait_event(struct nl_msg msg, void arg)
	391	{
	392	struct wait_event *wait = arg;
	393	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	394	int i;
	395
	396	for (i = 0; i < wait->n_cmds; i++) {
	397	if (gnlh->cmd == wait->cmds[i]) {
	398	wait->cmd = gnlh->cmd;
7e7c544f JB	399	if (wait->pargs)
7e7c544f JB	400	print_event(msg, wait->pargs);
957a0f07 JB	401	}
	402	}
	403
	404	return NL_SKIP;
	405	}
	406
ee374e4d	407	int __prepare_listen_events(struct nl80211_state *state)
957a0f07 JB	408	{
957a0f07 JB	409	int mcid, ret;
957a0f07 JB	410
	411	/* Configuration multicast group */
	412	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "config");
	413	if (mcid < 0)
	414	return mcid;
	415
	416	ret = nl_socket_add_membership(state->nl_sock, mcid);
	417	if (ret)
	418	return ret;
	419
	420	/* Scan multicast group */
	421	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "scan");
	422	if (mcid >= 0) {
	423	ret = nl_socket_add_membership(state->nl_sock, mcid);
	424	if (ret)
	425	return ret;
	426	}
	427
	428	/* Regulatory multicast group */
	429	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "regulatory");
	430	if (mcid >= 0) {
	431	ret = nl_socket_add_membership(state->nl_sock, mcid);
	432	if (ret)
	433	return ret;
	434	}
	435
	436	/* MLME multicast group */
	437	mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "mlme");
	438	if (mcid >= 0) {
	439	ret = nl_socket_add_membership(state->nl_sock, mcid);
	440	if (ret)
	441	return ret;
	442	}
	443
105aed57 JB	444	return 0;
	445	}
	446
ee374e4d JB	447	__u32 __do_listen_events(struct nl80211_state *state,
	448	const int n_waits, const __u32 *waits,
	449	struct print_event_args *args)
105aed57 JB	450	{
	451	struct nl_cb *cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
	452	struct wait_event wait_ev;
105aed57 JB	453
	454	if (!cb) {
	455	fprintf(stderr, "failed to allocate netlink callbacks\n");
	456	return -ENOMEM;
	457	}
	458
957a0f07 JB	459	/* no sequence checking for multicast messages */
	460	nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
	461
	462	if (n_waits && waits) {
	463	wait_ev.cmds = waits;
	464	wait_ev.n_cmds = n_waits;
7fabd346	465	wait_ev.pargs = args;
957a0f07	466	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, wait_event, &wait_ev);
7fabd346	467	} else
957a0f07	468	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_event, args);
957a0f07 JB	469
	470	wait_ev.cmd = 0;
	471
	472	while (!wait_ev.cmd)
	473	nl_recvmsgs(state->nl_sock, cb);
	474
	475	nl_cb_put(cb);
	476
	477	return wait_ev.cmd;
	478	}
	479
	480	__u32 listen_events(struct nl80211_state *state,
	481	const int n_waits, const __u32 *waits)
	482	{
ee374e4d JB	483	int ret;
	484
	485	ret = __prepare_listen_events(state);
	486	if (ret)
	487	return ret;
	488
	489	return __do_listen_events(state, n_waits, waits, NULL);
957a0f07 JB	490	}
	491
	492	static int print_events(struct nl80211_state *state,
	493	struct nl_cb *cb,
	494	struct nl_msg *msg,
	495	int argc, char **argv)
	496	{
	497	struct print_event_args args;
ee374e4d	498	int ret;
957a0f07 JB	499
	500	memset(&args, 0, sizeof(args));
	501
	502	argc--;
	503	argv++;
	504
	505	while (argc > 0) {
	506	if (strcmp(argv[0], "-f") == 0)
	507	args.frame = true;
	508	else if (strcmp(argv[0], "-t") == 0)
	509	args.time = true;
981b21ad JB	510	else if (strcmp(argv[0], "-r") == 0)
981b21ad JB	511	args.reltime = true;
957a0f07 JB	512	else
	513	return 1;
	514	argc--;
	515	argv++;
	516	}
	517
981b21ad JB	518	if (args.time && args.reltime)
	519	return 1;
	520
957a0f07 JB	521	if (argc)
	522	return 1;
	523
ee374e4d JB	524	ret = __prepare_listen_events(state);
	525	if (ret)
	526	return ret;
	527
	528	return __do_listen_events(state, 0, NULL, &args);
957a0f07	529	}
981b21ad	530	TOPLEVEL(event, "[-t] [-r] [-f]", 0, 0, CIB_NONE, print_events,
01ae06f9 JB	531	"Monitor events from the kernel.\n"
01ae06f9 JB	532	"-t - print timestamp\n"
981b21ad	533	"-r - print relative timstamp\n"
01ae06f9	534	"-f - print full frame for auth/assoc etc.");