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 diff --git a/ibss.c b/ibss.c
  18 index 7a0b707..a99a262 100644
  19 --- a/ibss.c
  20 +++ b/ibss.c
  21 @@ -16,6 +16,39 @@
  22
  23  SECTION(ibss);
  24
  25 +struct chanmode {
  26 +       const char *name;
  27 +       unsigned int width;
  28 +       int freq1_diff;
  29 +       int chantype; /* for older kernel */
  30 +};
  31 +
  32 +static int get_cf1(const struct chanmode *chanmode, unsigned long freq)
  33 +{
  34 +       int cf1 = freq, j;
  35 +       int vht80[] = { 5180, 5260, 5500, 5580, 5660, 5745 };
  36 +
  37 +       switch (chanmode->width) {
  38 +       case NL80211_CHAN_WIDTH_80:
  39 +               /* setup center_freq1 */
  40 +               for (j = 0; j < ARRAY_SIZE(vht80); j++) {
  41 +                       if (freq >= vht80[j] && freq < vht80[j] + 80)
  42 +                               break;
  43 +               }
  44 +
  45 +               if (j == ARRAY_SIZE(vht80))
  46 +                       break;
  47 +
  48 +               cf1 = vht80[j] + 30;
  49 +               break;
  50 +       default:
  51 +               cf1 = freq + chanmode->freq1_diff;
  52 +               break;
  53 +       }
  54 +
  55 +       return cf1;
  56 +}
  57 +
  58  static int join_ibss(struct nl80211_state *state,
  59                      struct nl_msg *msg,
  60                      int argc, char **argv,
  61 @@ -30,12 +63,8 @@ static int join_ibss(struct nl80211_state *state,
  62         int bintval;
  63         int i;
  64         unsigned long freq;
  65 -       static const struct {
  66 -               const char *name;
  67 -               unsigned int width;
  68 -               int freq1_diff;
  69 -               int chantype; /* for older kernel */
  70 -       } *chanmode_selected = NULL, chanmode[] = {
  71 +       const struct chanmode *chanmode_selected = NULL;
  72 +       static const struct chanmode chanmode[] = {
  73                 { .name = "HT20",
  74                   .width = NL80211_CHAN_WIDTH_20,
  75                   .freq1_diff = 0,
  76 @@ -60,6 +89,10 @@ static int join_ibss(struct nl80211_state *state,
  77                   .width = NL80211_CHAN_WIDTH_10,
  78                   .freq1_diff = 0,
  79                   .chantype = -1 },
  80 +               { .name = "80MHZ",
  81 +                 .width = NL80211_CHAN_WIDTH_80,
  82 +                 .freq1_diff = 0,
  83 +                 .chantype = -1 },
  84         };
  85
  86         if (argc < 2)
  87 @@ -90,7 +123,7 @@ static int join_ibss(struct nl80211_state *state,
  88                         NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH,
  89                                     chanmode_selected->width);
  90                         NLA_PUT_U32(msg, NL80211_ATTR_CENTER_FREQ1,
  91 -                                   freq + chanmode_selected->freq1_diff);
  92 +                                   get_cf1(chanmode_selected, freq));
  93                         if (chanmode_selected->chantype != -1)
  94                                 NLA_PUT_U32(msg,
  95                                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
  96 @@ -192,7 +225,7 @@ COMMAND(ibss, leave, NULL,
  97         NL80211_CMD_LEAVE_IBSS, 0, CIB_NETDEV, leave_ibss,
  98         "Leave the current IBSS cell.");
  99  COMMAND(ibss, join,
 100 -       "<SSID> <freq in MHz> [HT20|HT40+|HT40-|NOHT|5MHZ|10MHZ] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
 101 +       "<SSID> <freq in MHz> [HT20|HT40+|HT40-|NOHT|5MHZ|10MHZ|80MHZ] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
 102         " [basic-rates <rate in Mbps,rate2,...>] [mcast-rate <rate in Mbps>] "
 103         "[key d:0:abcde]",
 104         NL80211_CMD_JOIN_IBSS, 0, CIB_NETDEV, join_ibss,