Hello,
I found a problem about ifconfig tool in freebsd4.8:
When I used command "ifconfig fxp0 promisc", both IFF_PROMISC and
IFF_PPROMISC
of fxp0 were set.
Only IFF_PROMISC was set in freebsd4.5. I don't know why changes in 4.8.
Because the 2 flags are always been set at same time, "m_free(m)" in
following
code will never be reached.
Does any know why 4.8 changes "ifconfig"?
/* File: ether_input.c Func: ether_demux() */
if (!(BDG_ACTIVE(ifp))) {
/*
* Discard packet if upper layers shouldn't see it because it
* was unicast to a different Ethernet address. If the driver
* is working properly, then this situation can only happen
* when the interface is in promiscuous mode.
*/
if ((ifp->if_flags & IFF_PROMISC) != 0
&& (eh->ether_dhost[0] & 1) == 0
&& bcmp(eh->ether_dhost,
IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0
&& (ifp->if_flags & IFF_PPROMISC) == 0) {
m_freem(m);
return;
}
| > }
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