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P2PS: Add channel policy to PD Request

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Add operating channel selection and channel list processing similar to
that done when building GO Negotiation Request, i.e., consider the
currently used channels, configured channels, etc.

P2PS introduces a flow where a responder needs to provide channel data
without being previously aware of the current constraints, i.e., the
channels currently in use by other interfaces. To handle this, extend
the get_group_capability() callback to also handle channel selection
aspects of group capabilities.

In case there is an active P2P GO that is going to be used for the P2PS
PD, force its current operating frequency in the PD attributes.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
This commit is contained in:
Ilan Peer 2015-10-08 12:35:58 +03:00 • committed by Jouni Malinen
parent 4acd5ac67b
commit ebd32943cb
4 changed files with 111 additions and 60 deletions
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8
src/p2p/p2p.c
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@ -1459,7 +1459,7 @@ static void p2p_prepare_channel_best(struct p2p_data *p2p)
/**
* p2p_prepare_channel - Select operating channel for GO Negotiation
* p2p_prepare_channel - Select operating channel for GO Negotiation or P2PS PD
* @p2p: P2P module context from p2p_init()
* @dev: Selected peer device
* @force_freq: Forced frequency in MHz or 0 if not forced
@ -1468,9 +1468,9 @@ static void p2p_prepare_channel_best(struct p2p_data *p2p)
* Returns: 0 on success, -1 on failure (channel not supported for P2P)
*
* This function is used to do initial operating channel selection for GO
* Negotiation prior to having received peer information. The selected channel
* may be further optimized in p2p_reselect_channel() once the peer information
* is available.
* Negotiation prior to having received peer information or for P2PS PD
* signalling. The selected channel may be further optimized in
* p2p_reselect_channel() once the peer information is available.
*/
int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
unsigned int force_freq, unsigned int pref_freq, int go)