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nl80211: advertise GTK rekey support, new triggers

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Since we now have the necessary API in place to support
GTK rekeying, applications will need to know whether it
is supported by a device. Add a pseudo-trigger that is
used only to advertise that capability. Also, add some
new triggers that match what iwlagn devices can do.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2011-07-13 10:48:55 +02:00 committed by John W. Linville
parent 95acac61ba
commit 77dbbb1389
4 changed files with 90 additions and 6 deletions
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19
include/linux/nl80211.h
View file

@ -989,8 +989,8 @@ enum nl80211_commands {
* driving the peer link management state machine.
* @NL80211_MESH_SETUP_USERSPACE_AMPE must be enabled.
*
* @NL80211_ATTR_WOWLAN_SUPPORTED: indicates, as part of the wiphy capabilities,
* the supported WoWLAN triggers
* @NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED: indicates, as part of the wiphy
* capabilities, the supported WoWLAN triggers
* @NL80211_ATTR_WOWLAN_TRIGGERS: used by %NL80211_CMD_SET_WOWLAN to
* indicate which WoW triggers should be enabled. This is also
* used by %NL80211_CMD_GET_WOWLAN to get the currently enabled WoWLAN
@ -2255,6 +2255,16 @@ struct nl80211_wowlan_pattern_support {
*
* In %NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED, it is a binary attribute
* carrying a &struct nl80211_wowlan_pattern_support.
* @NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED: Not a real trigger, and cannot be
* used when setting, used only to indicate that GTK rekeying is supported
* by the device (flag)
* @NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE: wake up on GTK rekey failure (if
* done by the device) (flag)
* @NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST: wake up on EAP Identity Request
* packet (flag)
* @NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE: wake up on 4-way handshake (flag)
* @NL80211_WOWLAN_TRIG_RFKILL_RELEASE: wake up when rfkill is released
* (on devices that have rfkill in the device) (flag)
* @NUM_NL80211_WOWLAN_TRIG: number of wake on wireless triggers
* @MAX_NL80211_WOWLAN_TRIG: highest wowlan trigger attribute number
*/
@ -2264,6 +2274,11 @@ enum nl80211_wowlan_triggers {
NL80211_WOWLAN_TRIG_DISCONNECT,
NL80211_WOWLAN_TRIG_MAGIC_PKT,
NL80211_WOWLAN_TRIG_PKT_PATTERN,
NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED,
NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE,
NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST,
NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE,
NL80211_WOWLAN_TRIG_RFKILL_RELEASE,
/* keep last */
NUM_NL80211_WOWLAN_TRIG,

24
include/net/cfg80211.h
View file

@ -1146,9 +1146,15 @@ struct cfg80211_wowlan_trig_pkt_pattern {
* @magic_pkt: wake up on receiving magic packet
* @patterns: wake up on receiving packet matching a pattern
* @n_patterns: number of patterns
* @gtk_rekey_failure: wake up on GTK rekey failure
* @eap_identity_req: wake up on EAP identity request packet
* @four_way_handshake: wake up on 4-way handshake
* @rfkill_release: wake up when rfkill is released
*/
struct cfg80211_wowlan {
bool any, disconnect, magic_pkt;
bool any, disconnect, magic_pkt, gtk_rekey_failure,
eap_identity_req, four_way_handshake,
rfkill_release;
struct cfg80211_wowlan_trig_pkt_pattern *patterns;
int n_patterns;
};
@ -1673,11 +1679,21 @@ struct ieee80211_txrx_stypes {
* @WIPHY_WOWLAN_MAGIC_PKT: supports wakeup on magic packet
* (see nl80211.h)
* @WIPHY_WOWLAN_DISCONNECT: supports wakeup on disconnect
* @WIPHY_WOWLAN_SUPPORTS_GTK_REKEY: supports GTK rekeying while asleep
* @WIPHY_WOWLAN_GTK_REKEY_FAILURE: supports wakeup on GTK rekey failure
* @WIPHY_WOWLAN_EAP_IDENTITY_REQ: supports wakeup on EAP identity request
* @WIPHY_WOWLAN_4WAY_HANDSHAKE: supports wakeup on 4-way handshake failure
* @WIPHY_WOWLAN_RFKILL_RELEASE: supports wakeup on RF-kill release
*/
enum wiphy_wowlan_support_flags {
WIPHY_WOWLAN_ANY = BIT(0),
WIPHY_WOWLAN_MAGIC_PKT = BIT(1),
WIPHY_WOWLAN_DISCONNECT = BIT(2),
WIPHY_WOWLAN_ANY = BIT(0),
WIPHY_WOWLAN_MAGIC_PKT = BIT(1),
WIPHY_WOWLAN_DISCONNECT = BIT(2),
WIPHY_WOWLAN_SUPPORTS_GTK_REKEY = BIT(3),
WIPHY_WOWLAN_GTK_REKEY_FAILURE = BIT(4),
WIPHY_WOWLAN_EAP_IDENTITY_REQ = BIT(5),
WIPHY_WOWLAN_4WAY_HANDSHAKE = BIT(6),
WIPHY_WOWLAN_RFKILL_RELEASE = BIT(7),
};
/**

4
net/wireless/core.c
View file

@ -488,6 +488,10 @@ int wiphy_register(struct wiphy *wiphy)
int i;
u16 ifmodes = wiphy->interface_modes;
if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
!(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
return -EINVAL;
if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
return -EINVAL;

49
net/wireless/nl80211.c
View file

@ -205,6 +205,10 @@ nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
[NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
[NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
[NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
[NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
};
/* policy for GTK rekey offload attributes */
@ -929,6 +933,16 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
if (dev->wiphy.wowlan.n_patterns) {
struct nl80211_wowlan_pattern_support pat = {
.max_patterns = dev->wiphy.wowlan.n_patterns,
@ -5272,6 +5286,14 @@ static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
if (rdev->wowlan->magic_pkt)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
if (rdev->wowlan->gtk_rekey_failure)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
if (rdev->wowlan->eap_identity_req)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
if (rdev->wowlan->four_way_handshake)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
if (rdev->wowlan->rfkill_release)
NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
if (rdev->wowlan->n_patterns) {
struct nlattr *nl_pats, *nl_pat;
int i, pat_len;
@ -5348,6 +5370,33 @@ static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
new_triggers.magic_pkt = true;
}
if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
return -EINVAL;
if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
return -EINVAL;
new_triggers.gtk_rekey_failure = true;
}
if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
return -EINVAL;
new_triggers.eap_identity_req = true;
}
if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
return -EINVAL;
new_triggers.four_way_handshake = true;
}
if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
return -EINVAL;
new_triggers.rfkill_release = true;
}
if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
struct nlattr *pat;
int n_patterns = 0;