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cfg80211/nl80211: Add userspace authentication flag to mesh setup

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During mesh setup, use NL80211_MESH_SETUP_USERSPACE_AUTH flag to create
a secure mesh and route management frames to userspace.

Also, NL80211_CMD_GET_WIPHY now returns a flag NL80211_SUPPORT_MESH_AUTH
if the wiphy's mesh implementation supports routing of mesh auth frames
to userspace.  This is useful for forward compatibility between old
kernels and new userspace tools.

Signed-off-by: Javier Cardona <javier@cozybit.com>
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Javier Cardona 2011-04-07 15:08:28 -07:00 committed by John W. Linville
parent 581a8b0fee
commit 15d5dda623
4 changed files with 23 additions and 0 deletions
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9
include/linux/nl80211.h
View file

@ -887,6 +887,9 @@ enum nl80211_commands {
* changed once the mesh is active.
* @NL80211_ATTR_MESH_CONFIG: Mesh configuration parameters, a nested attribute
* containing attributes from &enum nl80211_meshconf_params.
* @NL80211_ATTR_SUPPORT_MESH_AUTH: Currently, this means the underlying driver
* allows auth frames in a mesh to be passed to userspace for processing via
* the @NL80211_MESH_SETUP_USERSPACE_AUTH flag.
*
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@ -1075,6 +1078,8 @@ enum nl80211_attrs {
NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
NL80211_ATTR_SUPPORT_MESH_AUTH,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@ -1724,6 +1729,9 @@ enum nl80211_meshconf_params {
* robust security network ie, or a vendor specific information element that
* vendors will use to identify the path selection methods and metrics in use.
*
* @NL80211_MESH_SETUP_USERSPACE_AUTH: Enable this option if an authentication
* daemon will be authenticating mesh candidates.
*
* @NL80211_MESH_SETUP_ATTR_MAX: highest possible mesh setup attribute number
* @__NL80211_MESH_SETUP_ATTR_AFTER_LAST: Internal use
*/
@ -1732,6 +1740,7 @@ enum nl80211_mesh_setup_params {
NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL,
NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC,
NL80211_MESH_SETUP_IE,
NL80211_MESH_SETUP_USERSPACE_AUTH,
/* keep last */
__NL80211_MESH_SETUP_ATTR_AFTER_LAST,

5
include/net/cfg80211.h
View file

@ -691,6 +691,7 @@ struct mesh_config {
* @path_metric: which metric to use
* @ie: vendor information elements (optional)
* @ie_len: length of vendor information elements
* @is_secure: or not
*
* These parameters are fixed when the mesh is created.
*/
@ -701,6 +702,7 @@ struct mesh_setup {
u8 path_metric;
const u8 *ie;
u8 ie_len;
bool is_secure;
};
/**
@ -1451,6 +1453,8 @@ struct cfg80211_ops {
* @WIPHY_FLAG_IBSS_RSN: The device supports IBSS RSN.
* @WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS: The device supports separate
* unicast and multicast TX keys.
* @WIPHY_FLAG_MESH_AUTH: The device supports mesh authentication by routing
* auth frames to userspace. See @NL80211_MESH_SETUP_USERSPACE_AUTH.
*/
enum wiphy_flags {
WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0),
@ -1463,6 +1467,7 @@ enum wiphy_flags {
WIPHY_FLAG_CONTROL_PORT_PROTOCOL = BIT(7),
WIPHY_FLAG_IBSS_RSN = BIT(8),
WIPHY_FLAG_SUPPORTS_SEPARATE_DEFAULT_KEYS= BIT(9),
WIPHY_FLAG_MESH_AUTH = BIT(10),
};
struct mac_address {

4
net/wireless/mesh.c
View file

@ -72,6 +72,10 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
return -EOPNOTSUPP;
if (!(rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
setup->is_secure)
return -EOPNOTSUPP;
if (wdev->mesh_id_len)
return -EALREADY;

5
net/wireless/nl80211.c
View file

@ -124,6 +124,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
[NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
[NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
[NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
[NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
.len = NL80211_HT_CAPABILITY_LEN },
@ -594,6 +595,8 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
sizeof(u32) * dev->wiphy.n_cipher_suites,
@ -2823,6 +2826,7 @@ static const struct nla_policy
nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
[NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
[NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
};
@ -2934,6 +2938,7 @@ static int nl80211_parse_mesh_setup(struct genl_info *info,
setup->ie = nla_data(ieattr);
setup->ie_len = nla_len(ieattr);
}
setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
return 0;
}