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nl80211: Add CONTROL_PORT_OVER_NL80211 attribute

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Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Denis Kenzior 2018-03-26 12:52:43 -05:00 committed by Johannes Berg
parent 2576a9ace4
commit 64bf3d4bc2
3 changed files with 42 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
include/net/cfg80211.h
View file

@ -647,6 +647,8 @@ struct survey_info {
* allowed through even on unauthorized ports
* @control_port_no_encrypt: TRUE to prevent encryption of control port
* protocol frames.
* @control_port_over_nl80211: TRUE if userspace expects to exchange control
* port frames over NL80211 instead of the network interface.
* @wep_keys: static WEP keys, if not NULL points to an array of
* CFG80211_MAX_WEP_KEYS WEP keys
* @wep_tx_key: key index (0..3) of the default TX static WEP key
@ -662,6 +664,7 @@ struct cfg80211_crypto_settings {
bool control_port;
__be16 control_port_ethertype;
bool control_port_no_encrypt;
bool control_port_over_nl80211;
struct key_params *wep_keys;
int wep_tx_key;
const u8 *psk;

14
include/uapi/linux/nl80211.h
View file

@ -542,7 +542,8 @@
* IEs in %NL80211_ATTR_IE, %NL80211_ATTR_AUTH_TYPE, %NL80211_ATTR_USE_MFP,
* %NL80211_ATTR_MAC, %NL80211_ATTR_WIPHY_FREQ, %NL80211_ATTR_CONTROL_PORT,
* %NL80211_ATTR_CONTROL_PORT_ETHERTYPE,
* %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT, %NL80211_ATTR_MAC_HINT, and
* %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT,
* %NL80211_ATTR_CONTROL_PORT_OVER_NL80211, %NL80211_ATTR_MAC_HINT, and
* %NL80211_ATTR_WIPHY_FREQ_HINT.
* If included, %NL80211_ATTR_MAC and %NL80211_ATTR_WIPHY_FREQ are
* restrictions on BSS selection, i.e., they effectively prevent roaming
@ -1488,6 +1489,15 @@ enum nl80211_commands {
* @NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT: When included along with
* %NL80211_ATTR_CONTROL_PORT_ETHERTYPE, indicates that the custom
* ethertype frames used for key negotiation must not be encrypted.
* @NL80211_ATTR_CONTROL_PORT_OVER_NL80211: A flag indicating whether control
* port frames (e.g. of type given in %NL80211_ATTR_CONTROL_PORT_ETHERTYPE)
* will be sent directly to the network interface or sent via the NL80211
* socket. If this attribute is missing, then legacy behavior of sending
* control port frames directly to the network interface is used. If the
* flag is included, then control port frames are sent over NL80211 instead
* using %CMD_CONTROL_PORT_FRAME. If control port routing over NL80211 is
* to be used then userspace must also use the %NL80211_ATTR_SOCKET_OWNER
* flag.
*
* @NL80211_ATTR_TESTDATA: Testmode data blob, passed through to the driver.
* We recommend using nested, driver-specific attributes within this.
@ -2647,6 +2657,8 @@ enum nl80211_attrs {
NL80211_ATTR_NSS,
NL80211_ATTR_ACK_SIGNAL,
NL80211_ATTR_CONTROL_PORT_OVER_NL80211,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,

26
net/wireless/nl80211.c
View file

@ -287,6 +287,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
[NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
[NL80211_ATTR_CONTROL_PORT_OVER_NL80211] = { .type = NLA_FLAG },
[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
@ -8211,6 +8212,22 @@ static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
return err;
}
static int validate_pae_over_nl80211(struct cfg80211_registered_device *rdev,
struct genl_info *info)
{
if (!info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
GENL_SET_ERR_MSG(info, "SOCKET_OWNER not set");
return -EINVAL;
}
if (!rdev->ops->tx_control_port ||
!wiphy_ext_feature_isset(&rdev->wiphy,
NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211))
return -EOPNOTSUPP;
return 0;
}
static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
struct genl_info *info,
struct cfg80211_crypto_settings *settings,
@ -8234,6 +8251,15 @@ static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
} else
settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) {
int r = validate_pae_over_nl80211(rdev, info);
if (r < 0)
return r;
settings->control_port_over_nl80211 = true;
}
if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
void *data;
int len, i;