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cfg80211: Enhance the AKM advertizement to support per interface.

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Commit ab4dfa2053 ("cfg80211: Allow drivers to advertise supported AKM
suites") introduces the support to advertize supported AKMs to userspace.

This needs an enhancement to advertize the AKM support per interface type,
specifically for the cfg80211-based drivers that implement SME and use
different mechanisms to support the AKM's for each interface type (e.g.,
the support for SAE, OWE AKM's take different paths for such drivers on
STA/AP mode).

This commit aims the same and enhances the earlier mechanism of advertizing
the AKMs per wiphy. Add new nl80211 attributes and data structure to
provide supported AKMs per interface type to userspace.

the AKMs advertized in akm_suites are default capabilities if not
advertized for a specific interface type in iftype_akm_suites.

Signed-off-by: Veerendranath Jakkam <vjakkam@codeaurora.org>
Link: https://lore.kernel.org/r/20200126203032.21934-1-vjakkam@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Veerendranath Jakkam
2020-01-27 02:00:32 +05:30
committed by Johannes Berg
parent 1e61d82cca
commit d6039a3416
3 changed files with 103 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
net/wireless/nl80211.c
View File

@@ -1896,6 +1896,46 @@ static int nl80211_send_pmsr_capa(struct cfg80211_registered_device *rdev,
return 0;
}
static int
nl80211_put_iftype_akm_suites(struct cfg80211_registered_device *rdev,
struct sk_buff *msg)
{
int i;
struct nlattr *nested, *nested_akms;
const struct wiphy_iftype_akm_suites *iftype_akms;
if (!rdev->wiphy.num_iftype_akm_suites ||
!rdev->wiphy.iftype_akm_suites)
return 0;
nested = nla_nest_start(msg, NL80211_ATTR_IFTYPE_AKM_SUITES);
if (!nested)
return -ENOBUFS;
for (i = 0; i < rdev->wiphy.num_iftype_akm_suites; i++) {
nested_akms = nla_nest_start(msg, i + 1);
if (!nested_akms)
return -ENOBUFS;
iftype_akms = &rdev->wiphy.iftype_akm_suites[i];
if (nl80211_put_iftypes(msg, NL80211_IFTYPE_AKM_ATTR_IFTYPES,
iftype_akms->iftypes_mask))
return -ENOBUFS;
if (nla_put(msg, NL80211_IFTYPE_AKM_ATTR_SUITES,
sizeof(u32) * iftype_akms->n_akm_suites,
iftype_akms->akm_suites)) {
return -ENOBUFS;
}
nla_nest_end(msg, nested_akms);
}
nla_nest_end(msg, nested);
return 0;
}
struct nl80211_dump_wiphy_state {
s64 filter_wiphy;
long start;
@@ -2454,6 +2494,9 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
rdev->wiphy.akm_suites))
goto nla_put_failure;
if (nl80211_put_iftype_akm_suites(rdev, msg))
goto nla_put_failure;
/* done */
state->split_start = 0;
break;