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P2P: Document operating channel selection functions

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Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-12-27 08:27:11 +02:00
parent 50285f5ca8
commit a5830ede8e
2 changed files with 24 additions and 0 deletions
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13
src/p2p/p2p.c
View file

@ -1117,6 +1117,19 @@ void p2p_stop_find(struct p2p_data *p2p)
}
/**
* p2p_prepare_channel - Select operating channel for GO Negotiation
* @p2p: P2P module context from p2p_init()
* @dev: Selected peer device
* @force_freq: Forced frequency in MHz or 0 if not forced
* @pref_freq: Preferred frequency in MHz or 0 if no preference
* 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.
*/
static int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
unsigned int force_freq, unsigned int pref_freq)
{

11
src/p2p/p2p_go_neg.c
View file

@ -336,6 +336,17 @@ static struct wpabuf * p2p_build_go_neg_resp(struct p2p_data *p2p,
}
/**
* p2p_reselect_channel - Re-select operating channel based on peer information
* @p2p: P2P module context from p2p_init()
* @intersection: Support channel list intersection from local and peer
*
* This function is used to re-select the best channel after having received
* information from the peer to allow supported channel lists to be intersected.
* This can be used to improve initial channel selection done in
* p2p_prepare_channel() prior to the start of GO Negotiation. In addition, this
* can be used for Invitation case.
*/
void p2p_reselect_channel(struct p2p_data *p2p,
struct p2p_channels *intersection)
{