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etheriwl: dont let transmit change back receiver settings when in promisc mode, cleanup

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This commit is contained in:
cinap_lenrek 2013-02-13 08:23:54 +01:00
parent 194094683a
commit 0243f52bae
2 changed files with 23 additions and 24 deletions
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41
sys/src/9/pc/etheriwl.c
View file

@ -327,6 +327,7 @@ struct Ctlr {
int bssnodeid;
/* current receiver settings */
uchar bssid[Eaddrlen];
int channel;
int prom;
int aid;
@ -1264,43 +1265,39 @@ void
rxon(Ether *edev, Wnode *bss)
{
uchar c[Tcmdsize], *p;
Ctlr *ctlr;
uchar *bssid;
int filter, flags;
Ctlr *ctlr;
ctlr = edev->ctlr;
bssid = edev->bcast;
filter = FilterMulticast | FilterBeacon;
if(ctlr->prom)
if(ctlr->prom){
filter |= FilterPromisc;
bss = nil;
}
if(bss != nil){
ctlr->channel = bss->channel;
if(bss->aid != 0){
bssid = bss->bssid;
memmove(ctlr->bssid, bss->bssid, Eaddrlen);
ctlr->aid = bss->aid;
if(ctlr->aid != 0){
filter |= FilterBSS;
filter &= ~FilterBeacon;
ctlr->aid = bss->aid;
ctlr->bssnodeid = -1;
} else {
filter &= ~FilterBSS;
filter |= FilterBeacon;
ctlr->aid = 0;
} else
ctlr->bcastnodeid = -1;
}
} else {
memmove(ctlr->bssid, edev->bcast, Eaddrlen);
ctlr->aid = 0;
ctlr->bcastnodeid = -1;
ctlr->bssnodeid = -1;
}
flags = RFlagTSF | RFlagCTSToSelf | RFlag24Ghz | RFlagAuto;
if(0) print("rxon: bssid %E, aid %x, channel %d, filter %x, flags %x\n",
bssid, ctlr->aid, ctlr->channel, filter, flags);
ctlr->bssid, ctlr->aid, ctlr->channel, filter, flags);
memset(p = c, 0, sizeof(c));
memmove(p, edev->ea, 6); p += 8; /* myaddr */
memmove(p, bssid, 6); p += 8; /* bssid */
memmove(p, ctlr->bssid, 6); p += 8; /* bssid */
memmove(p, edev->ea, 6); p += 8; /* wlap */
*p++ = 3; /* mode (STA) */
*p++ = 0; /* air (?) */
@ -1335,6 +1332,7 @@ rxon(Ether *edev, Wnode *bss)
ctlr->bssnodeid = 0;
addnode(ctlr, ctlr->bssnodeid, bss->bssid);
}
flushcmd(ctlr);
}
static struct ratetab {
@ -1386,7 +1384,11 @@ transmit(Wifi *wifi, Wnode *wn, Block *b)
ctlr = edev->ctlr;
qlock(ctlr);
if(wn != nil && (wn->aid != ctlr->aid || wn->channel != ctlr->channel))
if(ctlr->prom == 0)
if(wn->aid != ctlr->aid
|| wn->channel != ctlr->channel
|| memcmp(wn->bssid, ctlr->bssid, Eaddrlen) != 0)
rxon(edev, wn);
rate = 0;
@ -1515,10 +1517,7 @@ iwlpromiscuous(void *arg, int on)
ctlr = edev->ctlr;
qlock(ctlr);
ctlr->prom = on;
if(ctlr->prom)
rxon(edev, nil);
else
rxon(edev, ctlr->wifi->bss);
rxon(edev, ctlr->wifi->bss);
qunlock(ctlr);
}

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

@ -345,7 +345,8 @@ wifietheroq(Wifi *wifi, Block *b)
Wnode *bss;
SNAP *s;
if(BLEN(b) < ETHERHDRSIZE){
bss = wifi->bss;
if(bss == nil || BLEN(b) < ETHERHDRSIZE){
freeb(b);
return;
}
@ -357,8 +358,7 @@ wifietheroq(Wifi *wifi, Block *b)
w = (Wifipkt*)b->rp;
w->fc[0] = 0x08; /* data */
w->fc[1] = 0x01; /* STA->AP */
bss = wifi->bss;
memmove(w->a1, bss != nil ? bss->bssid : wifi->ether->bcast, Eaddrlen);
memmove(w->a1, bss->bssid, Eaddrlen);
memmove(w->a2, e.s, Eaddrlen);
memmove(w->a3, e.d, Eaddrlen);