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P2P NFC: Optimize join-a-group operation based on NFC information

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When the NFC connection handover message received from a peer indicates
that the peer is operating as a GO on a specific channel, use that
information to avoid having to go through full scan. In addition, skip
the separate join-a-group scan since we already know the operating
channel, GO P2P Device Address, and SSID.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2013-09-07 15:44:29 -07:00 • committed by Jouni Malinen
parent 86e320819c
commit 23318bea94
6 changed files with 101 additions and 42 deletions
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20
src/p2p/p2p.c
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@ -4493,12 +4493,17 @@ int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
if (freq < 0) {
p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
return -1;
} else {
p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
dev->oob_go_neg_freq = freq;
}
role = msg.oob_go_neg_channel[5];
if (!params->sel) {
if (role == P2P_GO_IN_A_GROUP) {
p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
params->go_freq = freq;
} else
p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
dev->oob_go_neg_freq = freq;
if (!params->sel && role != P2P_GO_IN_A_GROUP) {
freq = p2p_channel_to_freq(p2p->cfg->reg_class,
p2p->cfg->channel);
if (freq < 0) {
@ -4509,7 +4514,12 @@ int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
dev->oob_go_neg_freq = freq;
}
role = msg.oob_go_neg_channel[5];
if (msg.group_id) {
os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
params->go_ssid_len = msg.group_id_len - ETH_ALEN;
os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
params->go_ssid_len);
}
p2p_parse_free(&msg);