From adfe075ce06ab79dd360f76db74d823d8dc43ece Mon Sep 17 00:00:00 2001 From: Pyun YongHyeon Date: Sat, 6 Nov 2010 21:54:32 +0000 Subject: [PATCH] If we got an invalid station address, generate random address. This might be caused by broken BIOS. Reported by: "Mikhail T." aldan.algebra.com> MFC after: 1 week --- sys/dev/sk/if_sk.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/sys/dev/sk/if_sk.c b/sys/dev/sk/if_sk.c index 5a8c959e3bda..3ed6300b0d56 100644 --- a/sys/dev/sk/if_sk.c +++ b/sys/dev/sk/if_sk.c @@ -1319,8 +1319,10 @@ sk_attach(dev) struct sk_softc *sc; struct sk_if_softc *sc_if; struct ifnet *ifp; + u_int32_t r; int error, i, phy, port; u_char eaddr[6]; + u_char inv_mac[] = {0, 0, 0, 0, 0, 0}; if (dev == NULL) return(EINVAL); @@ -1400,6 +1402,23 @@ sk_attach(dev) eaddr[i] = sk_win_read_1(sc, SK_MAC0_0 + (port * 8) + i); + /* Verify whether the station address is invalid or not. */ + if (bcmp(eaddr, inv_mac, sizeof(inv_mac)) == 0) { + device_printf(sc_if->sk_if_dev, + "Generating random ethernet address\n"); + r = arc4random(); + /* + * Set OUI to convenient locally assigned address. 'b' + * is 0x62, which has the locally assigned bit set, and + * the broadcast/multicast bit clear. + */ + eaddr[0] = 'b'; + eaddr[1] = 's'; + eaddr[2] = 'd'; + eaddr[3] = (r >> 16) & 0xff; + eaddr[4] = (r >> 8) & 0xff; + eaddr[5] = (r >> 0) & 0xff; + } /* * Set up RAM buffer addresses. The NIC will have a certain * amount of SRAM on it, somewhere between 512K and 2MB. We