Here's a screenshot:
mcgrof@pogo ~ $ iw event
mcgrof@pogo ~ $ sudo iw dev wlan0 scan trigger
beacon hint:
phy1 5200 MHz [40]:
o active scanning enabled
o beaconing enabled
scan finished on wlan1 (phy #1)
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---
iw.c | 75 +++++++++++++++++++++++++++++++++++++++++
nl80211.h | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 183 insertions(+), 3 deletions(-)
diff --git a/iw.c b/iw.c
index c074554..427ce38 100644
--- a/iw.c
+++ b/iw.c
@@ -12,6 +12,7 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
+#include <stdbool.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
@@ -330,6 +331,22 @@ static int print_event(struct nl_msg *msg, void *arg)
struct nlattr *tb[NL80211_ATTR_MAX + 1];
char ifname[100];
__u8 reg_type;
+ struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
+ struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
+ static struct nla_policy 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 },
+ };
+ static struct ieee80211_channel {
+ __u16 center_freq;
+ bool passive_scan;
+ bool no_ibss;
+ } chan_before_beacon, chan_after_beacon;
+ int rem_band, rem_freq, num_bands = 0;
+ unsigned int num_freqs = 0;
+ struct nlattr *nl_freq, *nl_band;
+ __u32 wiphy_idx = 0;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
@@ -386,6 +403,64 @@ static int print_event(struct nl_msg *msg, void *arg)
printf("\n");
break;
+ case NL80211_CMD_REG_BEACON_HINT:
+
+ if (!tb[NL80211_ATTR_WIPHY_BANDS])
+ break;
+
+ 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));
+
+ nla_for_each_nested(nl_band, tb[NL80211_ATTR_WIPHY_BANDS], rem_band) {
+
+ num_bands++;
+ if (num_bands > 2)
+ continue;
+
+ nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
+ nla_len(nl_band), NULL);
+ nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
+ struct ieee80211_channel *chan;
+
+ chan = (num_freqs == 0) ? &chan_before_beacon : &chan_after_beacon;
+
+ num_freqs++;
+
+ if (num_freqs > 2)
+ return NL_SKIP;
+
+ nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
+ nla_len(nl_freq), freq_policy);
+ if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
+ continue;
+ 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;
+ }
+ }
+
+ 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;
default:
printf("unknown event: %d\n", gnlh->cmd);
break;
diff --git a/nl80211.h b/nl80211.h
index f33aa08..946be56 100644
--- a/nl80211.h
+++ b/nl80211.h
@@ -7,7 +7,7 @@
* Copyright 2008 Michael Wu <flamingice@xxxxxxxxxxxx>
* Copyright 2008 Luis Carlos Cobo <luisca@xxxxxxxxxxx>
* Copyright 2008 Michael Buesch <mb@xxxxxxxxx>
- * Copyright 2008 Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
+ * Copyright 2008, 2009 Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
* Copyright 2008 Jouni Malinen <jouni.malinen@xxxxxxxxxxx>
* Copyright 2008 Colin McCabe <colin@xxxxxxxxxxx>
*
@@ -142,6 +142,12 @@
* %NL80211_ATTR_IE. If the command succeeds, the requested data will be
* added to all specified management frames generated by
* kernel/firmware/driver.
+ * Note: This command has been removed and it is only reserved at this
+ * point to avoid re-using existing command number. The functionality this
+ * command was planned for has been provided with cleaner design with the
+ * option to specify additional IEs in NL80211_CMD_TRIGGER_SCAN,
+ * NL80211_CMD_AUTHENTICATE, NL80211_CMD_ASSOCIATE,
+ * NL80211_CMD_DEAUTHENTICATE, and NL80211_CMD_DISASSOCIATE.
*
* @NL80211_CMD_GET_SCAN: get scan results
* @NL80211_CMD_TRIGGER_SCAN: trigger a new scan with the given parameters
@@ -160,6 +166,57 @@
* set (%NL80211_ATTR_REG_TYPE), if the type of regulatory domain is
* %NL80211_REG_TYPE_COUNTRY the alpha2 to which we have moved on
* to (%NL80211_ATTR_REG_ALPHA2).
+ * @NL80211_CMD_REG_BEACON_HINT: indicates to userspace that an AP beacon
+ * has been found while world roaming thus enabling active scan or
+ * any mode of operation that initiates TX (beacons) on a channel
+ * where we would not have been able to do either before. As an example
+ * if you are world roaming (regulatory domain set to world or if your
+ * driver is using a custom world roaming regulatory domain) and while
+ * doing a passive scan on the 5 GHz band you find an AP there (if not
+ * on a DFS channel) you will now be able to actively scan for that AP
+ * or use AP mode on your card on that same channel. Note that this will
+ * never be used for channels 1-11 on the 2 GHz band as they are always
+ * enabled world wide. This beacon hint is only sent if your device had
+ * either disabled active scanning or beaconing on a channel. We send to
+ * userspace the wiphy on which we removed a restriction from
+ * (%NL80211_ATTR_WIPHY) and the channel on which this occured
+ * (%NL80211_ATTR_WIPHY_FREQ) before and after the beacon hint was applied.
+ * We send the two channels on a frequency nestered attribute
+ * (%NL80211_BAND_ATTR_FREQS) the first being the channel prior to the
+ * beacon hint processing. We only send these events if something _did_
+ * change to the channel.
+ *
+ * @NL80211_CMD_AUTHENTICATE: authentication request and notification.
+ * This command is used both as a command (request to authenticate) and
+ * as an event on the "mlme" multicast group indicating completion of the
+ * authentication process.
+ * When used as a command, %NL80211_ATTR_IFINDEX is used to identify the
+ * interface. %NL80211_ATTR_MAC is used to specify PeerSTAAddress (and
+ * BSSID in case of station mode). %NL80211_ATTR_SSID is used to specify
+ * the SSID (mainly for association, but is included in authentication
+ * request, too, to help BSS selection. %NL80211_ATTR_WIPHY_FREQ is used
+ * to specify the frequence of the channel in MHz. %NL80211_ATTR_AUTH_TYPE
+ * is used to specify the authentication type. %NL80211_ATTR_IE is used to
+ * define IEs (VendorSpecificInfo, but also including RSN IE and FT IEs)
+ * to be added to the frame.
+ * When used as an event, this reports reception of an Authentication
+ * frame in station and IBSS modes when the local MLME processed the
+ * frame, i.e., it was for the local STA and was received in correct
+ * state. This is similar to MLME-AUTHENTICATE.confirm primitive in the
+ * MLME SAP interface (kernel providing MLME, userspace SME). The
+ * included NL80211_ATTR_FRAME attribute contains the management frame
+ * (including both the header and frame body, but not FCS).
+ * @NL80211_CMD_ASSOCIATE: association request and notification; like
+ * NL80211_CMD_AUTHENTICATE but for Association and Reassociation
+ * (similar to MLME-ASSOCIATE.request, MLME-REASSOCIATE.request,
+ * MLME-ASSOCIATE.confirm or MLME-REASSOCIATE.confirm primitives).
+ * @NL80211_CMD_DEAUTHENTICATE: deauthentication request and notification; like
+ * NL80211_CMD_AUTHENTICATE but for Deauthentication frames (similar to
+ * MLME-DEAUTHENTICATION.request and MLME-DEAUTHENTICATE.indication
+ * primitives).
+ * @NL80211_CMD_DISASSOCIATE: disassociation request and notification; like
+ * NL80211_CMD_AUTHENTICATE but for Disassociation frames (similar to
+ * MLME-DISASSOCIATE.request and MLME-DISASSOCIATE.indication primitives).
*
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
@@ -206,7 +263,7 @@ enum nl80211_commands {
NL80211_CMD_GET_MESH_PARAMS,
NL80211_CMD_SET_MESH_PARAMS,
- NL80211_CMD_SET_MGMT_EXTRA_IE,
+ NL80211_CMD_SET_MGMT_EXTRA_IE /* reserved; not used */,
NL80211_CMD_GET_REG,
@@ -216,6 +273,12 @@ enum nl80211_commands {
NL80211_CMD_SCAN_ABORTED,
NL80211_CMD_REG_CHANGE,
+ NL80211_CMD_REG_BEACON_HINT,
+
+ NL80211_CMD_AUTHENTICATE,
+ NL80211_CMD_ASSOCIATE,
+ NL80211_CMD_DEAUTHENTICATE,
+ NL80211_CMD_DISASSOCIATE,
/* add new commands above here */
@@ -230,8 +293,12 @@ enum nl80211_commands {
*/
#define NL80211_CMD_SET_BSS NL80211_CMD_SET_BSS
#define NL80211_CMD_SET_MGMT_EXTRA_IE NL80211_CMD_SET_MGMT_EXTRA_IE
-
#define NL80211_CMD_REG_CHANGE NL80211_CMD_REG_CHANGE
+#define NL80211_CMD_AUTHENTICATE NL80211_CMD_AUTHENTICATE
+#define NL80211_CMD_ASSOCIATE NL80211_CMD_ASSOCIATE
+#define NL80211_CMD_DEAUTHENTICATE NL80211_CMD_DEAUTHENTICATE
+#define NL80211_CMD_DISASSOCIATE NL80211_CMD_DISASSOCIATE
+#define NL80211_CMD_REG_BEACON_HINT NL80211_CMD_REG_BEACON_HINT
/**
* enum nl80211_attrs - nl80211 netlink attributes
@@ -349,6 +416,19 @@ enum nl80211_commands {
* @NL80211_ATTR_REG_TYPE: indicates the type of the regulatory domain currently
* set. This can be one of the nl80211_reg_type (%NL80211_REGDOM_TYPE_*)
*
+ * @NL80211_ATTR_SUPPORTED_COMMANDS: wiphy attribute that specifies
+ * an array of command numbers (i.e. a mapping index to command number)
+ * that the driver for the given wiphy supports.
+ *
+ * @NL80211_ATTR_FRAME: frame data (binary attribute), including frame header
+ * and body, but not FCS; used, e.g., with NL80211_CMD_AUTHENTICATE and
+ * NL80211_CMD_ASSOCIATE events
+ * @NL80211_ATTR_SSID: SSID (binary attribute, 0..32 octets)
+ * @NL80211_ATTR_AUTH_TYPE: AuthenticationType, see &enum nl80211_auth_type,
+ * represented as a u32
+ * @NL80211_ATTR_REASON_CODE: ReasonCode for %NL80211_CMD_DEAUTHENTICATE and
+ * %NL80211_CMD_DISASSOCIATE, u16
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -426,6 +506,13 @@ enum nl80211_attrs {
NL80211_ATTR_REG_INITIATOR,
NL80211_ATTR_REG_TYPE,
+ NL80211_ATTR_SUPPORTED_COMMANDS,
+
+ NL80211_ATTR_FRAME,
+ NL80211_ATTR_SSID,
+ NL80211_ATTR_AUTH_TYPE,
+ NL80211_ATTR_REASON_CODE,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -445,6 +532,10 @@ enum nl80211_attrs {
#define NL80211_ATTR_IE NL80211_ATTR_IE
#define NL80211_ATTR_REG_INITIATOR NL80211_ATTR_REG_INITIATOR
#define NL80211_ATTR_REG_TYPE NL80211_ATTR_REG_TYPE
+#define NL80211_ATTR_FRAME NL80211_ATTR_FRAME
+#define NL80211_ATTR_SSID NL80211_ATTR_SSID
+#define NL80211_ATTR_AUTH_TYPE NL80211_ATTR_AUTH_TYPE
+#define NL80211_ATTR_REASON_CODE NL80211_ATTR_REASON_CODE
#define NL80211_MAX_SUPP_RATES 32
#define NL80211_MAX_SUPP_REG_RULES 32
@@ -978,4 +1069,18 @@ enum nl80211_bss {
NL80211_BSS_MAX = __NL80211_BSS_AFTER_LAST - 1
};
+/**
+ * enum nl80211_auth_type - AuthenticationType
+ *
+ * @NL80211_AUTHTYPE_OPEN_SYSTEM: Open System authentication
+ * @NL80211_AUTHTYPE_SHARED_KEY: Shared Key authentication (WEP only)
+ * @NL80211_AUTHTYPE_FT: Fast BSS Transition (IEEE 802.11r)
+ * @NL80211_AUTHTYPE_NETWORK_EAP: Network EAP (some Cisco APs and mainly LEAP)
+ */
+enum nl80211_auth_type {
+ NL80211_AUTHTYPE_OPEN_SYSTEM,
+ NL80211_AUTHTYPE_SHARED_KEY,
+ NL80211_AUTHTYPE_FT,
+ NL80211_AUTHTYPE_NETWORK_EAP,
+};
#endif /* __LINUX_NL80211_H */
--
1.6.0.6
--
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