Sorry if you've seen this twice, can't seem vger/linux-net to post my mail regularly..or maybe it's something on my end... Ben Greear wrote: > > Donald Becker wrote: > > > > On Tue, 2 Jan 2001, Ben Greear wrote: > > > > > Some additional notes: I had the same bad results trying to set > > > the mac on a tulip based NIC with kernel 2.2.17. Using the tulip-diag > > > tool, I was able to see that the original MAC was still reported by > > > the NIC, but ifconfig showed the one I had tried to set. > > > > > > Hopefully I'm missing some simple detail/command?? > > > > The tulip-diag and rtl8139-diag programs have _almost_ all of the code to > > change the station address for most of the supported chips(1). > > > > But people are almost always wrong about their reasons for wanting the > > station address _permanently_ changed, so I frequently leave the actual code > > disabled in the diagnostic programs. > > I'm not arguing with that, I just want to temporarily change it. ifconfig > and ip both supposedly give you that option, it just doesn't work unless > you put the NIC into PROMISC mode, because the card itself (must?) still > think it is the old MAC. I'd rather just have a way to tell the NIC > to change it's MAC that it keeps in RAM/registers, and leave it's EEPROM > alone so that everything goes back to normal on power-cycle. > > Does some version of the code below have that ability? > > Many thanks, > Ben > > > > > The complex part of the code is there, and has been tested. For instance, > > see the comment in rtl8139-diag.c: > > ____ > > /* Caution! This routine works! > > It will permanently change the EEPROM contents. > > "You could put an eye out with that thing." */ > > static int do_update(long ioaddr, unsigned short *ee_values, > > > > The missing code is just > > -------- > > if (set_hwaddr) > > for (i = 0; i < 3; i++) > > do_update(ioaddr, eeprom_contents, 7 + i, "Station address", > > (new_hwaddr[i*2]<<8) + new_hwaddr[i*2+1]); > > > > Note: The 21041 and PNIC-1 (82c168 and '169) use unique EEPROM access > > methods. I don't think that it's possible to write the 21040 EEPROM. > > > > Donald Becker becker@scyld.com > > Scyld Computing Corporation http://www.scyld.com > > 410 Severn Ave. Suite 210 Second Generation Beowulf Clusters > > Annapolis MD 21403 410-990-9993 > > -- > Ben Greear (greearb@candelatech.com) http://www.candelatech.com > Author of ScryMUD: scry.wanfear.com 4444 (Released under GPL) > http://scry.wanfear.com http://scry.wanfear.com/~greear -- Ben Greear (greearb@candelatech.com) http://www.candelatech.com Author of ScryMUD: scry.wanfear.com 4444 (Released under GPL) http://scry.wanfear.com http://scry.wanfear.com/~greear - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org
