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IBSS: Update operating frequency if joining an existing IBSS

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If a matching IBSS is found in scan results, change requested frequency
to match and disable OBSS scan.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
This commit is contained in:
Janusz Dziedzic 2015-02-19 07:15:46 +01:00 committed by Jouni Malinen
parent 4d9e6fba2a
commit 98479dc95e
1 changed files with 34 additions and 3 deletions
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37
wpa_supplicant/wpa_supplicant.c
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@ -1654,6 +1654,13 @@ void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
} }
static int bss_is_ibss(struct wpa_bss *bss)
{
return (bss->caps & (IEEE80211_CAP_ESS | IEEE80211_CAP_IBSS)) ==
IEEE80211_CAP_IBSS;
}
void ibss_mesh_setup_freq(struct wpa_supplicant *wpa_s, void ibss_mesh_setup_freq(struct wpa_supplicant *wpa_s,
const struct wpa_ssid *ssid, const struct wpa_ssid *ssid,
struct hostapd_freq_params *freq) struct hostapd_freq_params *freq)
@ -1664,11 +1671,35 @@ void ibss_mesh_setup_freq(struct wpa_supplicant *wpa_s,
184, 192 }; 184, 192 };
struct hostapd_channel_data *pri_chan = NULL, *sec_chan = NULL; struct hostapd_channel_data *pri_chan = NULL, *sec_chan = NULL;
u8 channel; u8 channel;
int i, chan_idx, ht40 = -1, res; int i, chan_idx, ht40 = -1, res, obss_scan = 1;
unsigned int j; unsigned int j;
freq->freq = ssid->frequency; freq->freq = ssid->frequency;
for (j = 0; j < wpa_s->last_scan_res_used; j++) {
struct wpa_bss *bss = wpa_s->last_scan_res[j];
if (ssid->mode != WPAS_MODE_IBSS)
break;
/* Don't adjust control freq in case of fixed_freq */
if (ssid->fixed_freq)
break;
if (!bss_is_ibss(bss))
continue;
if (ssid->ssid_len == bss->ssid_len &&
os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) == 0) {
wpa_printf(MSG_DEBUG,
"IBSS already found in scan results, adjust control freq: %d",
bss->freq);
freq->freq = bss->freq;
obss_scan = 0;
break;
}
}
/* For IBSS check HT_IBSS flag */ /* For IBSS check HT_IBSS flag */
if (ssid->mode == WPAS_MODE_IBSS && if (ssid->mode == WPAS_MODE_IBSS &&
!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_HT_IBSS)) !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_HT_IBSS))
@ -1682,7 +1713,7 @@ void ibss_mesh_setup_freq(struct wpa_supplicant *wpa_s,
return; return;
} }
hw_mode = ieee80211_freq_to_chan(ssid->frequency, &channel); hw_mode = ieee80211_freq_to_chan(freq->freq, &channel);
for (i = 0; wpa_s->hw.modes && i < wpa_s->hw.num_modes; i++) { for (i = 0; wpa_s->hw.modes && i < wpa_s->hw.num_modes; i++) {
if (wpa_s->hw.modes[i].mode == hw_mode) { if (wpa_s->hw.modes[i].mode == hw_mode) {
mode = &wpa_s->hw.modes[i]; mode = &wpa_s->hw.modes[i];
@ -1753,7 +1784,7 @@ void ibss_mesh_setup_freq(struct wpa_supplicant *wpa_s,
break; break;
} }
if (freq->sec_channel_offset) { if (freq->sec_channel_offset && obss_scan) {
struct wpa_scan_results *scan_res; struct wpa_scan_results *scan_res;
scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0); scan_res = wpa_supplicant_get_scan_results(wpa_s, NULL, 0);