nexmon – Rev 1
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#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 no_ir;
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_NO_IR] = { .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_NO_IR])
chan->no_ir = 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;
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("CQM 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;
bool found_one = false;
rssi_event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
switch (rssi_event) {
case NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH:
printf("RSSI went above threshold\n");
found_one = true;
break;
case NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW:
printf("RSSI went below threshold\n");
found_one = true;
break;
case NL80211_CQM_RSSI_BEACON_LOSS_EVENT:
printf("Beacon loss detected\n");
found_one = true;
break;
}
if (!found_one)
printf("Unknown event type: %i\n", rssi_event);
} else if (cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT]) {
if (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("PKT-LOSS-EVENT did not have MAC attribute!\n");
}
} else if (cqm[NL80211_ATTR_CQM_BEACON_LOSS_EVENT]) {
printf("beacon loss\n");
} else {
printf("unknown event\n");
}
}
static const char * key_type_str(enum nl80211_key_type key_type)
{
static char buf[30];
switch (key_type) {
case NL80211_KEYTYPE_GROUP:
return "Group";
case NL80211_KEYTYPE_PAIRWISE:
return "Pairwise";
case NL80211_KEYTYPE_PEERKEY:
return "PeerKey";
default:
snprintf(buf, sizeof(buf), "unknown(%d)", key_type);
return buf;
}
}
static void parse_mic_failure(struct nlattr **attrs)
{
printf("Michael MIC failure event:");
if (attrs[NL80211_ATTR_MAC]) {
char addr[3 * ETH_ALEN];
mac_addr_n2a(addr, nla_data(attrs[NL80211_ATTR_MAC]));
printf(" source MAC address %s", addr);
}
if (attrs[NL80211_ATTR_KEY_SEQ] &&
nla_len(attrs[NL80211_ATTR_KEY_SEQ]) == 6) {
unsigned char *seq = nla_data(attrs[NL80211_ATTR_KEY_SEQ]);
printf(" seq=%02x%02x%02x%02x%02x%02x",
seq[0], seq[1], seq[2], seq[3], seq[4], seq[5]);
}
if (attrs[NL80211_ATTR_KEY_TYPE]) {
enum nl80211_key_type key_type =
nla_get_u32(attrs[NL80211_ATTR_KEY_TYPE]);
printf(" Key Type %s", key_type_str(key_type));
}
if (attrs[NL80211_ATTR_KEY_IDX]) {
__u8 key_id = nla_get_u8(attrs[NL80211_ATTR_KEY_IDX]);
printf(" Key Id %d", key_id);
}
printf("\n");
}
static void parse_wowlan_wake_event(struct nlattr **attrs)
{
struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG],
*tb_match[NUM_NL80211_ATTR];
printf("WoWLAN wakeup\n");
if (!attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
printf("\twakeup not due to WoWLAN\n");
return;
}
nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
nla_data(attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
nla_len(attrs[NL80211_ATTR_WOWLAN_TRIGGERS]), NULL);
if (tb[NL80211_WOWLAN_TRIG_DISCONNECT])
printf("\t* was disconnected\n");
if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT])
printf("\t* magic packet received\n");
if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN])
printf("\t* pattern index: %u\n",
nla_get_u32(tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]));
if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE])
printf("\t* GTK rekey failure\n");
if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST])
printf("\t* EAP identity request\n");
if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE])
printf("\t* 4-way handshake\n");
if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE])
printf("\t* RF-kill released\n");
if (tb[NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS]) {
struct nlattr *match, *freq;
int rem_nst, rem_nst2;
printf("\t* network detected\n");
nla_for_each_nested(match,
tb[NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS],
rem_nst) {
nla_parse(tb_match, NUM_NL80211_ATTR, nla_data(match),
nla_len(match),
NULL);
printf("\t\tSSID: \"");
print_ssid_escaped(nla_len(tb_match[NL80211_ATTR_SSID]),
nla_data(tb_match[NL80211_ATTR_SSID]));
printf("\"");
if (tb_match[NL80211_ATTR_SCAN_FREQUENCIES]) {
printf(" freq(s):");
nla_for_each_nested(freq,
tb_match[NL80211_ATTR_SCAN_FREQUENCIES],
rem_nst2)
printf(" %d", nla_get_u32(freq));
}
printf("\n");
}
}
if (tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211]) {
uint8_t *d = nla_data(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211]);
int l = nla_len(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211]);
int i;
printf("\t* packet (might be truncated): ");
for (i = 0; i < l; i++) {
if (i > 0)
printf(":");
printf("%.2x", d[i]);
}
printf("\n");
}
if (tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023]) {
uint8_t *d = nla_data(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023]);
int l = nla_len(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023]);
int i;
printf("\t* packet (might be truncated): ");
for (i = 0; i < l; i++) {
if (i > 0)
printf(":");
printf("%.2x", d[i]);
}
printf("\n");
}
if (tb[NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH])
printf("\t* TCP connection wakeup received\n");
if (tb[NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST])
printf("\t* TCP connection lost\n");
if (tb[NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS])
printf("\t* TCP connection ran out of tokens\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_WDEV] && tb[NL80211_ATTR_WIPHY]) {
printf("wdev 0x%llx (phy #%d): ",
(unsigned long long)nla_get_u64(tb[NL80211_ATTR_WDEV]),
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_WDEV]) {
printf("wdev 0x%llx: ", (unsigned long long)nla_get_u64(tb[NL80211_ATTR_WDEV]));
} 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_START_SCHED_SCAN:
printf("scheduled scan started\n");
break;
case NL80211_CMD_SCHED_SCAN_STOPPED:
printf("sched scan stopped\n");
break;
case NL80211_CMD_SCHED_SCAN_RESULTS:
printf("got scheduled scan results\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.no_ir && !chan_after_beacon.no_ir) {
if (chan_before_beacon.no_ibss && !chan_after_beacon.no_ibss)
printf("\to Initiating radiation enabled\n");
else
printf("\to active scan enabled\n");
} else if (chan_before_beacon.no_ibss && !chan_after_beacon.no_ibss) {
printf("\to ibss 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_DEL_STATION:
mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
printf("del 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;
case NL80211_CMD_MICHAEL_MIC_FAILURE:
parse_mic_failure(tb);
break;
case NL80211_CMD_FRAME_TX_STATUS:
printf("mgmt TX status (cookie %llx): %s\n",
(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]),
tb[NL80211_ATTR_ACK] ? "acked" : "no ack");
break;
case NL80211_CMD_PMKSA_CANDIDATE:
printf("PMKSA candidate found\n");
break;
case NL80211_CMD_SET_WOWLAN:
parse_wowlan_wake_event(tb);
break;
case NL80211_CMD_PROBE_CLIENT:
if (tb[NL80211_ATTR_MAC])
mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
else
strcpy(macbuf, "??");
printf("probe client %s (cookie %llx): %s\n",
macbuf,
(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]),
tb[NL80211_ATTR_ACK] ? "acked" : "no ack");
break;
case NL80211_CMD_VENDOR:
printf("vendor event %.6x:%d\n",
nla_get_u32(tb[NL80211_ATTR_VENDOR_ID]),
nla_get_u32(tb[NL80211_ATTR_VENDOR_SUBCMD]));
if (args->frame && tb[NL80211_ATTR_VENDOR_DATA])
iw_hexdump("vendor event",
nla_data(tb[NL80211_ATTR_VENDOR_DATA]),
nla_len(tb[NL80211_ATTR_VENDOR_DATA]));
break;
case NL80211_CMD_RADAR_DETECT:
printf("radar event ");
if (tb[NL80211_ATTR_RADAR_EVENT]) {
switch (nla_get_u32(tb[NL80211_ATTR_RADAR_EVENT])) {
case NL80211_RADAR_DETECTED:
printf("(radar detected)");
break;
case NL80211_RADAR_CAC_FINISHED:
printf("(cac finished)");
break;
case NL80211_RADAR_CAC_ABORTED:
printf("(cac aborted)");
break;
case NL80211_RADAR_NOP_FINISHED:
printf("(nop finished)");
break;
default:
printf("(unknown)");
break;
};
} else {
printf("(unknown)");
}
printf("\n");
break;
case NL80211_CMD_DEL_WIPHY:
printf("delete wiphy\n");
break;
default:
printf("unknown event %d (%s)\n",
gnlh->cmd, command_name(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;
}
mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "vendor");
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,
enum id_input id)
{
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.");