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p2p: Respond to Probe Requests when in discovery

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Since our DBus API and our use cases only support initiating connections
and not accepting incoming connections we don't really need to reply to
Probe Requests on the P2P-Device interface.  Start doing it firstly so
that we can test the scenario where we get discovered and pre-authorized
to connect in an autotest (wpa_supplicant doesn't seem to have a way to
authorize everyone, which is probably why most Wi-Fi Display dongles
don't do it and instead reply with "Fail: Information not available" and
then restart connection from their side) and secondly because the spec
wants us to do it.
This commit is contained in:
Andrew Zaborowski 2020-09-29 18:37:09 +02:00 committed by Denis Kenzior
parent ef902c5f7e
commit d5c7b47745
1 changed files with 17 additions and 16 deletions
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33
src/p2p.c
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@ -3554,6 +3554,20 @@ static void p2p_device_send_probe_resp(struct p2p_device *dev,
resp_info.capability = dev->capability;
resp_info.device_info = dev->device_info;
/*
* Note the SSID and resp_info.group_clients are not updated with
* our group information because we generally won't be in the
* Listen State on the P2P Device when running a group. Otherwise
* we'd be sending two Probe Responses, one from the P2P Interface
* and another from the P2P Device. According to this part in
* Wi-Fi P2P Technical Specification v1.7 section 3.2.2 it seems
* only the P2P Interface is supposed to be sending Probe
* Responses in that situation:
* "In all Probe Responses that it sends, a P2P Group Owner shall
* set the SSID to the SSID of the group, and shall set the SA and
* BSSID to its P2P Interface Address."
*/
p2p_ie = p2p_build_probe_resp(&resp_info, &p2p_ie_size);
if (!p2p_ie) {
l_error("Can't build our Probe Response P2P IE");
@ -3686,23 +3700,10 @@ static void p2p_device_probe_cb(const struct mmpdu_header *mpdu,
}
/*
* We don't currently have a use case for replying to Probe Requests
* except when waiting for a GO Negotiation Request from our target
* peer. Some of those peers (seemingly running ancient and/or
* hw-manufacturer-provided versions of wpa_s) will only send us GO
* Negotiation Requests each time they receive our Probe Response
* frame, even if that frame's body is unparsable.
* TODO: use ap.c code to check if we match the SSID, BSSID, DSSS
* Channel etc. in the Probe Request, and to build the Response body.
*/
if (from_conn_peer) {
/*
* TODO: use ap.c code to check if we match the SSID, BSSID,
* DSSS Channel etc. in the Probe Request, and to build the
* Response body.
*/
p2p_device_send_probe_resp(dev, mpdu->address_2,
from_conn_peer);
goto p2p_free;
}
p2p_device_send_probe_resp(dev, mpdu->address_2, from_conn_peer);
/*
* The peer's listen frequency may be different from ours.