xfnw/plan9fox
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

wifi: handle short preamble and short time slot capabilities

Browse source 
- drivers enable short preamble and sort timeslot depending
  on the ap beacon capinfo field (bss->cap)
- wifi sets short preamble bit in capinfo on association request
- wifi sets short timeslot bit when ap advertized it in beacon
This commit is contained in:
cinap_lenrek 2017-02-13 22:26:38 +01:00
parent 7d4a1e3643
commit 45d01d9c99
4 changed files with 26 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
sys/src/9/pc/etheriwl.c
View file

@ -1845,7 +1845,12 @@ rxon(Ether *edev, Wnode *bss)
ctlr->channel = bss->channel;
bss = nil;
}
flags = RFlagTSF | RFlagCTSToSelf | RFlag24Ghz | RFlagAuto;
if(bss != nil){
if(bss->cap & (1<<5))
flags |= RFlagShPreamble;
if(bss->cap & (1<<10))
flags |= RFlagShSlot;
ctlr->channel = bss->channel;
memmove(ctlr->bssid, bss->bssid, Eaddrlen);
ctlr->aid = bss->aid;
@ -1861,7 +1866,6 @@ rxon(Ether *edev, Wnode *bss)
ctlr->bcastnodeid = -1;
ctlr->bssnodeid = -1;
}
flags = RFlagTSF | RFlagCTSToSelf | RFlag24Ghz | RFlagAuto;
if(ctlr->aid != 0)
setled(ctlr, 2, 0, 1); /* on when associated */

8
sys/src/9/pc/etherrt2860.c
View file

@ -1318,10 +1318,12 @@ rxon(Ether *edev, Wnode *bss)
{
u32int tmp;
Ctlr *ctlr;
int cap;
ctlr = edev->ctlr;
if(bss != nil){
cap = bss->cap;
ctlr->channel = bss->channel;
memmove(ctlr->bssid, bss->bssid, Eaddrlen);
ctlr->aid = bss->aid;
@ -1332,6 +1334,7 @@ rxon(Ether *edev, Wnode *bss)
}else
ctlr->bcastnodeid = -1;
}else{
cap = 0;
memmove(ctlr->bssid, edev->bcast, Eaddrlen);
ctlr->aid = 0;
ctlr->bcastnodeid = -1;
@ -1377,14 +1380,13 @@ rxon(Ether *edev, Wnode *bss)
/* update slot */
tmp = csr32r(ctlr, BkoffSlotCfg);
tmp &= ~0xff;
tmp |= /* (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : */ 20;
tmp |= (cap & (1<<10)) ? 9 : 20;
csr32w(ctlr, BkoffSlotCfg, tmp);
/* set TX preamble */
tmp = csr32r(ctlr, AutoRspCfg);
tmp &= ~CckShortEn;
/* if(sc->sc_ic.ic_flags & IEEE80211_F_SHPREAMBLE)
tmp |= CckShortEn; */
if(cap & (1<<5)) tmp |= CckShortEn;
csr32w(ctlr, AutoRspCfg, tmp);
/* set basic rates */

6
sys/src/9/pc/etherwpi.c
View file

@ -1304,7 +1304,12 @@ rxon(Ether *edev, Wnode *bss)
ctlr->channel = bss->channel;
bss = nil;
}
flags = RFlagTSF | RFlag24Ghz | RFlagAuto;
if(bss != nil){
if(bss->cap & (1<<5))
flags |= RFlagShPreamble;
if(bss->cap & (1<<10))
flags |= RFlagShSlot;
ctlr->channel = bss->channel;
memmove(ctlr->bssid, bss->bssid, Eaddrlen);
ctlr->aid = bss->aid;
@ -1319,7 +1324,6 @@ rxon(Ether *edev, Wnode *bss)
ctlr->bcastnodeid = -1;
ctlr->bssnodeid = -1;
}
flags = RFlagTSF | RFlag24Ghz | RFlagAuto;
if(ctlr->aid != 0)
setled(ctlr, 2, 0, 1); /* on when associated */

15
sys/src/9/pc/wifi.c
View file

@ -320,7 +320,7 @@ sendassoc(Wifi *wifi, Wnode *bss)
Wifipkt *w;
Block *b;
uchar *p;
int n;
int cap, n;
b = allocb(WIFIHDRSIZE + 512);
w = (Wifipkt*)b->wp;
@ -331,9 +331,16 @@ sendassoc(Wifi *wifi, Wnode *bss)
memmove(w->a3, bss->bssid, Eaddrlen);
b->wp += WIFIHDRSIZE;
p = b->wp;
*p++ = 1; /* capinfo */
*p++ = 0;
*p++ = 16; /* interval */
/* capinfo */
cap = 1; // ESS
cap |= (1<<5); // Short Preamble
cap |= (1<<10) & bss->cap; // Short Slot Time
*p++ = cap;
*p++ = cap>>8;
/* interval */
*p++ = 16;
*p++ = 16>>8;
n = strlen(bss->ssid);