[PATCH 1/2] ibss: fix control freq if IBSS already found

Janusz Dziedzic janusz.dziedzic at tieto.com
Tue Jan 20 00:16:10 EST 2015


On 19 January 2015 at 16:09, Antonio Quartulli <antonio at meshcoding.com> wrote:
> Hello,
>
> On 19/01/15 10:02, Janusz Dziedzic wrote:
>> If IBSS already found in scan results change
>> requested frequency and disable OBSS scan.
>>
>> Signed-off-by: Janusz Dziedzic <janusz.dziedzic at tieto.com>
>> ---
>>  wpa_supplicant/wpa_supplicant.c | 31 ++++++++++++++++++++++++++++---
>>  1 file changed, 28 insertions(+), 3 deletions(-)
>>
>> diff --git a/wpa_supplicant/wpa_supplicant.c b/wpa_supplicant/wpa_supplicant.c
>> index 000c9ba..56f4c44 100644
>> --- a/wpa_supplicant/wpa_supplicant.c
>> +++ b/wpa_supplicant/wpa_supplicant.c
>> @@ -1650,6 +1650,12 @@ 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,
>>                         const struct wpa_ssid *ssid,
>>                         struct hostapd_freq_params *freq)
>> @@ -1660,17 +1666,36 @@ void ibss_mesh_setup_freq(struct wpa_supplicant *wpa_s,
>>                          184, 192 };
>>       struct hostapd_channel_data *pri_chan = NULL, *sec_chan = NULL;
>>       u8 channel;
>> -     int i, chan_idx, ht40 = -1, res;
>> +     int i, chan_idx, ht40 = -1, res, obss_scan = 1;
>>       unsigned int j;
>>
>>       freq->freq = ssid->frequency;
>>
>> +     for (i = 0; i < wpa_s->last_scan_res_used; i++) {
>> +             struct wpa_bss *bss = wpa_s->last_scan_res[i];
>> +
>> +             if (ssid->mode != WPAS_MODE_IBSS)
>> +                     break;
>> +
>> +             if (!bss_is_ibss(bss))
>> +                     continue;
>> +
>> +             if (ssid->ssid_len == bss->ssid_len &&
>> +                 !memcmp(ssid->ssid, bss->ssid, bss->ssid_len)) {
>> +                     wpa_printf(MSG_DEBUG, "IBSS already found in scan results, "
>> +                                           "adjust control freq: %d", bss->freq);
>> +                     freq->freq = bss->freq;
>> +                     obss_scan = 0;
>> +                     break;
>> +             }
>> +     }
>
> What if the user really wanted to start the IBSS on the specify
> frequency rather than joining an already existing cell ?
>
patch 2/2 with fixed freq handle this

BR
Janusz


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