2015-09-10 10:04:49

by Janusz Dziedzic

Subject: [PATCH] ibss: add VHT80 support for IBSS

Add VHT80 support for IBSS.

eg. iw wlan0 ibss join 5180 80MHZ
iw wlan0 ibbs join 5220 80MHZ

Signed-off-by: Janusz Dziedzic <[email protected]>
---
ibss.c | 48 ++++++++++++++++++++++++++++++++++++++++--------
1 file changed, 40 insertions(+), 8 deletions(-)

diff --git a/ibss.c b/ibss.c
index 7a0b707..460f549 100644
--- a/ibss.c
+++ b/ibss.c
@@ -16,6 +16,38 @@

SECTION(ibss);

+struct chanmode {
+ const char *name;
+ unsigned int width;
+ int freq1_diff;
+ int chantype; /* for older kernel */
+};
+
+static int get_cf1(const struct chanmode *chanmode, unsigned long freq) {
+ int cf1 = freq, j;
+ int vht80[] = { 5180, 5260, 5500, 5580, 5660, 5745 };
+
+ switch (chanmode->width) {
+ case NL80211_CHAN_WIDTH_80:
+ /* setup center_freq1 */
+ for (j = 0; j < ARRAY_SIZE(vht80); j++) {
+ if (freq >= vht80[j] && freq < vht80[j] + 80)
+ break;
+ }
+
+ if (j == ARRAY_SIZE(vht80))
+ break;
+
+ cf1 = vht80[j] + 30;
+ break;
+ default:
+ cf1 = freq + chanmode->freq1_diff;
+ break;
+ }
+
+ return cf1;
+}
+
static int join_ibss(struct nl80211_state *state,
struct nl_msg *msg,
int argc, char **argv,
@@ -30,12 +62,8 @@ static int join_ibss(struct nl80211_state *state,
int bintval;
int i;
unsigned long freq;
- static const struct {
- const char *name;
- unsigned int width;
- int freq1_diff;
- int chantype; /* for older kernel */
- } *chanmode_selected = NULL, chanmode[] = {
+ const struct chanmode *chanmode_selected = NULL;
+ static const struct chanmode chanmode[] = {
{ .name = "HT20",
.width = NL80211_CHAN_WIDTH_20,
.freq1_diff = 0,
@@ -60,6 +88,10 @@ static int join_ibss(struct nl80211_state *state,
.width = NL80211_CHAN_WIDTH_10,
.freq1_diff = 0,
.chantype = -1 },
+ { .name = "80MHZ",
+ .width = NL80211_CHAN_WIDTH_80,
+ .freq1_diff = 0,
+ .chantype = -1 },
};

if (argc < 2)
@@ -90,7 +122,7 @@ static int join_ibss(struct nl80211_state *state,
NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH,
chanmode_selected->width);
NLA_PUT_U32(msg, NL80211_ATTR_CENTER_FREQ1,
- freq + chanmode_selected->freq1_diff);
+ get_cf1(chanmode_selected, freq));
if (chanmode_selected->chantype != -1)
NLA_PUT_U32(msg,
NL80211_ATTR_WIPHY_CHANNEL_TYPE,
@@ -192,7 +224,7 @@ COMMAND(ibss, leave, NULL,
NL80211_CMD_LEAVE_IBSS, 0, CIB_NETDEV, leave_ibss,
"Leave the current IBSS cell.");
COMMAND(ibss, join,
- "<SSID> <freq in MHz> [HT20|HT40+|HT40-|NOHT|5MHZ|10MHZ] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
+ "<SSID> <freq in MHz> [HT20|HT40+|HT40-|NOHT|5MHZ|10MHZ|80MHZ] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
" [basic-rates <rate in Mbps,rate2,...>] [mcast-rate <rate in Mbps>] "
"[key d:0:abcde]",
NL80211_CMD_JOIN_IBSS, 0, CIB_NETDEV, join_ibss,
--
1.9.1

2015-09-18 09:12:34

by Johannes Berg

Subject: Re: [PATCH] ibss: add VHT80 support for IBSS

On Thu, 2015-09-10 at 12:04 +0200, Janusz Dziedzic wrote:
> Add VHT80 support for IBSS.
>
> eg. iw wlan0 ibss join 5180 80MHZ
> iw wlan0 ibbs join 5220 80MHZ
>
Applied, with the obvious code style issue fixed.

johannes