package/network/utils/iw/patches/301-ibss_add_VHT80.patch

   1 From: "Janusz.Dziedzic@tieto.com" <Janusz.Dziedzic@tieto.com>
   2 Date: Thu, 10 Sep 2015 12:04:13 +0200
   3 Subject: ibss: add VHT80 support for IBSS
   4
   5 Add VHT80 support for IBSS.
   6
   7 eg. iw wlan0 ibss join 5180 80MHZ
   8     iw wlan0 ibbs join 5220 80MHZ
   9
  10 Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
  11 [fix formatting]
  12 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  13 ---
  14  ibss.c | 49 +++++++++++++++++++++++++++++++++++++++++--------
  15  1 file changed, 41 insertions(+), 8 deletions(-)
  16
  17 --- a/ibss.c
  18 +++ b/ibss.c
  19 @@ -16,6 +16,39 @@
  20
  21  SECTION(ibss);
  22
  23 +struct chanmode {
  24 +       const char *name;
  25 +       unsigned int width;
  26 +       int freq1_diff;
  27 +       int chantype; /* for older kernel */
  28 +};
  29 +
  30 +static int get_cf1(const struct chanmode *chanmode, unsigned long freq)
  31 +{
  32 +       int cf1 = freq, j;
  33 +       int vht80[] = { 5180, 5260, 5500, 5580, 5660, 5745 };
  34 +
  35 +       switch (chanmode->width) {
  36 +       case NL80211_CHAN_WIDTH_80:
  37 +               /* setup center_freq1 */
  38 +               for (j = 0; j < ARRAY_SIZE(vht80); j++) {
  39 +                       if (freq >= vht80[j] && freq < vht80[j] + 80)
  40 +                               break;
  41 +               }
  42 +
  43 +               if (j == ARRAY_SIZE(vht80))
  44 +                       break;
  45 +
  46 +               cf1 = vht80[j] + 30;
  47 +               break;
  48 +       default:
  49 +               cf1 = freq + chanmode->freq1_diff;
  50 +               break;
  51 +       }
  52 +
  53 +       return cf1;
  54 +}
  55 +
  56  static int join_ibss(struct nl80211_state *state,
  57                      struct nl_msg *msg,
  58                      int argc, char **argv,
  59 @@ -30,12 +63,8 @@ static int join_ibss(struct nl80211_stat
  60         int bintval;
  61         int i;
  62         unsigned long freq;
  63 -       static const struct {
  64 -               const char *name;
  65 -               unsigned int width;
  66 -               int freq1_diff;
  67 -               int chantype; /* for older kernel */
  68 -       } *chanmode_selected = NULL, chanmode[] = {
  69 +       const struct chanmode *chanmode_selected = NULL;
  70 +       static const struct chanmode chanmode[] = {
  71                 { .name = "HT20",
  72                   .width = NL80211_CHAN_WIDTH_20,
  73                   .freq1_diff = 0,
  74 @@ -60,6 +89,10 @@ static int join_ibss(struct nl80211_stat
  75                   .width = NL80211_CHAN_WIDTH_10,
  76                   .freq1_diff = 0,
  77                   .chantype = -1 },
  78 +               { .name = "80MHZ",
  79 +                 .width = NL80211_CHAN_WIDTH_80,
  80 +                 .freq1_diff = 0,
  81 +                 .chantype = -1 },
  82         };
  83
  84         if (argc < 2)
  85 @@ -90,7 +123,7 @@ static int join_ibss(struct nl80211_stat
  86                         NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH,
  87                                     chanmode_selected->width);
  88                         NLA_PUT_U32(msg, NL80211_ATTR_CENTER_FREQ1,
  89 -                                   freq + chanmode_selected->freq1_diff);
  90 +                                   get_cf1(chanmode_selected, freq));
  91                         if (chanmode_selected->chantype != -1)
  92                                 NLA_PUT_U32(msg,
  93                                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
  94 @@ -192,7 +225,7 @@ COMMAND(ibss, leave, NULL,
  95         NL80211_CMD_LEAVE_IBSS, 0, CIB_NETDEV, leave_ibss,
  96         "Leave the current IBSS cell.");
  97  COMMAND(ibss, join,
  98 -       "<SSID> <freq in MHz> [HT20|HT40+|HT40-|NOHT|5MHZ|10MHZ] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
  99 +       "<SSID> <freq in MHz> [HT20|HT40+|HT40-|NOHT|5MHZ|10MHZ|80MHZ] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
 100         " [basic-rates <rate in Mbps,rate2,...>] [mcast-rate <rate in Mbps>] "
 101         "[key d:0:abcde]",
 102         NL80211_CMD_JOIN_IBSS, 0, CIB_NETDEV, join_ibss,