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wifi: filter SNAP ethernet orgcode only

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This commit is contained in:
cinap_lenrek 2013-02-11 16:02:16 +01:00
parent 1f6a402c46
commit 8d271549cd
1 changed files with 5 additions and 1 deletions
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6
sys/src/9/pc/wifi.c
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@ -63,9 +63,13 @@ wifiiq(Wifi *wifi, Block *b)
default:
goto drop;
}
if(BLEN(b) < SNAPHDRSIZE || b->rp[0] != 0xAA || b->rp[1] != 0xAA || b->rp[2] != 0x03)
if(BLEN(b) < SNAPHDRSIZE)
break;
memmove(&s, b->rp, SNAPHDRSIZE);
if(s.dsap != 0xAA || s.ssap != 0xAA || s.control != 3)
break;
if(s.orgcode[0] != 0 || s.orgcode[1] != 0 || s.orgcode[2] != 0)
break;
b->rp += SNAPHDRSIZE-ETHERHDRSIZE;
e = (Etherpkt*)b->rp;
switch(w.fc[1] & 0x03){