diff options
| -rw-r--r-- | sys/src/9/pc/wifi.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/sys/src/9/pc/wifi.c b/sys/src/9/pc/wifi.c index 19c5b3676..743f0cac8 100644 --- a/sys/src/9/pc/wifi.c +++ b/sys/src/9/pc/wifi.c @@ -372,10 +372,10 @@ static void recvbeacon(Wifi *wifi, Wnode *wn, uchar *d, int len) { static uchar wpa1oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; - uchar *e, *x, *p; - uchar t, m[256/8]; + uchar *e, *x, *p, t; - if(len < 8+2+2) + len -= 8+2+2; + if(len < 0) return; d += 8; /* timestamp */ @@ -384,19 +384,12 @@ recvbeacon(Wifi *wifi, Wnode *wn, uchar *d, int len) wn->cap = d[0] | d[1]<<8; d += 2; - memset(m, 0, sizeof(m)); for(e = d + len; d+2 <= e; d = x){ d += 2; x = d + d[-1]; - if(x > e) + if(x > e) break; /* truncated */ t = d[-2]; - - /* skip double entries */ - if(m[t/8] & 1<<(t%8)) - continue; - m[t/8] |= 1<<(t%8); - switch(t){ case 0: /* SSID */ len = 0; |