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P2P: Consider channel optimizations for additional cases 

Re-factor the code, so channel optimizations would be also triggered
upon the following changes: channel updates from the kernel,
disallow_freq interface, etc.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
This commit is contained in:
Ilan Peer 2015-07-27 22:24:25 +03:00 committed by Jouni Malinen
parent 0f4bccdbbe
commit c2675c87c3
1 changed files with 35 additions and 52 deletions
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87
wpa_supplicant/p2p_supplicant.c
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@ -135,8 +135,14 @@ static int wpas_p2p_add_group_interface(struct wpa_supplicant *wpa_s,
enum wpa_driver_if_type type);
static void wpas_p2p_group_formation_failed(struct wpa_supplicant *wpa_s,
int already_deleted);
static void wpas_p2p_optimize_listen_channel(struct wpa_supplicant *wpa_s,
struct wpa_used_freq_data *freqs,
unsigned int num);
static void wpas_p2p_move_go(void *eloop_ctx, void *timeout_ctx);
static int wpas_p2p_go_is_peer_freq(struct wpa_supplicant *wpa_s, int freq);
static void wpas_p2p_consider_moving_gos(struct wpa_supplicant *wpa_s,
struct wpa_used_freq_data *freqs,
unsigned int num);
/*
@ -7065,11 +7071,18 @@ void wpas_p2p_pbc_overlap_cb(void *eloop_ctx, void *timeout_ctx)
void wpas_p2p_update_channel_list(struct wpa_supplicant *wpa_s)
{
struct p2p_channels chan, cli_chan;
struct wpa_supplicant *ifs;
struct wpa_used_freq_data *freqs = NULL;
unsigned int num = wpa_s->num_multichan_concurrent;
if (wpa_s->global == NULL || wpa_s->global->p2p == NULL)
return;
freqs = os_calloc(num, sizeof(struct wpa_used_freq_data));
if (!freqs)
return;
num = get_shared_radio_freqs_data(wpa_s, freqs, num);
os_memset(&chan, 0, sizeof(chan));
os_memset(&cli_chan, 0, sizeof(cli_chan));
if (wpas_p2p_setup_channels(wpa_s, &chan, &cli_chan)) {
@ -7080,27 +7093,17 @@ void wpas_p2p_update_channel_list(struct wpa_supplicant *wpa_s)
p2p_update_channel_list(wpa_s->global->p2p, &chan, &cli_chan);
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
int freq;
if (!ifs->current_ssid ||
!ifs->current_ssid->p2p_group ||
(ifs->current_ssid->mode != WPAS_MODE_P2P_GO &&
ifs->current_ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION))
continue;
freq = ifs->current_ssid->frequency;
if (freq_included(ifs, &chan, freq)) {
wpa_dbg(ifs, MSG_DEBUG,
"P2P GO operating frequency %d MHz in valid range",
freq);
continue;
}
wpas_p2p_optimize_listen_channel(wpa_s, freqs, num);
wpa_dbg(ifs, MSG_DEBUG,
"P2P GO operating in invalid frequency %d MHz", freq);
/* TODO: Consider using CSA or removing the group within
* wpa_supplicant */
wpa_msg(ifs, MSG_INFO, P2P_EVENT_REMOVE_AND_REFORM_GROUP);
}
/*
* The used frequencies map changed, so it is possible that a GO is
* using a channel that is no longer valid for P2P use. It is also
* possible that due to policy consideration, it would be preferable to
* move it to a frequency already used by other station interfaces.
*/
wpas_p2p_consider_moving_gos(wpa_s, freqs, num);
os_free(freqs);
}
@ -8360,6 +8363,16 @@ static void wpas_p2p_optimize_listen_channel(struct wpa_supplicant *wpa_s,
u8 curr_chan, cand, chan;
unsigned int i;
/*
* If possible, optimize the Listen channel to be a channel that is
* already used by one of the other interfaces.
*/
if (!wpa_s->conf->p2p_optimize_listen_chan)
return;
if (!wpa_s->current_ssid || wpa_s->wpa_state != WPA_COMPLETED)
return;
curr_chan = p2p_get_listen_channel(wpa_s->global->p2p);
for (i = 0, cand = 0; i < num; i++) {
ieee80211_freq_to_chan(freqs[i].freq, &chan);
@ -8562,40 +8575,10 @@ static void wpas_p2p_consider_moving_gos(struct wpa_supplicant *wpa_s,
void wpas_p2p_indicate_state_change(struct wpa_supplicant *wpa_s)
{
struct wpa_used_freq_data *freqs;
unsigned int num = wpa_s->num_multichan_concurrent;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
/*
* If possible, optimize the Listen channel to be a channel that is
* already used by one of the other interfaces.
*/
if (!wpa_s->conf->p2p_optimize_listen_chan)
return;
if (!wpa_s->current_ssid || wpa_s->wpa_state != WPA_COMPLETED)
return;
freqs = os_calloc(num, sizeof(struct wpa_used_freq_data));
if (!freqs)
return;
num = get_shared_radio_freqs_data(wpa_s, freqs, num);
wpas_p2p_optimize_listen_channel(wpa_s, freqs, num);
/*
* The used frequencies map changed, so it is possible that a GO is
* using a channel that is no longer valid for P2P use. It is also
* possible that due to policy consideration, it would be preferable to
* move the group to a frequency already used by other station
* interfaces.
*/
wpas_p2p_consider_moving_gos(wpa_s, freqs, num);
os_free(freqs);
wpas_p2p_update_channel_list(wpa_s);
}