Vendor specific data within a beacon frame
Fri Oct 8 03:50:08 PDT 2010
Ok, I'm sorry I didn't epress myself well.
There is the struct 80211_gmt in the ieee80211_mgmt module in the
ieeee80211_defs.h, but there is no field for vendor specific data (of
course it will be set by the hostapd).
From the hostapd the function ieee802_11_set_beacon(...) calls the
wpa_driver_nl80211_set_beacon function in driver_nl80211.c (we are using
In wpa_driver_nl80211_set_beacon fct. the macro NLA_PUT and NLA_PUT_32
is used to set the header and tail of a mgmt frame.
If I am right, I have to use the attribute NL80211_ATTR_IE to set
information elements data with %NL80211_CMD_SET_MGMT_EXTRA_IE (in
nl80211.h). But in the enum nl80211_commands is written:
NL80211_CMD_SET_MGMT_EXTRA_IE /* reserved; not used */,
Does somebody knows how to fix it?
On 07.10.2010 20:35, Johannes Berg wrote:
> On Thu, 2010-10-07 at 11:31 -0700, Luis R. Rodriguez wrote:
>> On Thu, Oct 7, 2010 at 11:15 AM, Johannes Berg
>> <johannes at sipsolutions.net> wrote:
>>> On Thu, 2010-10-07 at 11:11 -0700, Luis R. Rodriguez wrote:
>>> Let me quote what you wrote, but just partially:
>>>> This can be done from userspace. This is from nl80211.h:
>>>> * 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.
>> Yeah just noticed *after* I pasted it and sent it. Does hostapd use
>> this currently?
> No, hostapd transmits frames via injection and the data it puts into the
> beacon is conveyed with the beacon cmd -- it has never used this
> Really, what the OP is looking for is the annotated hostapd
> configuration file or the hostapd source code -- he should be able to
> figure that out for himself.
More information about the Hostap