Date: Fri, 16 Jun 2000 13:14:43 -0700 (PDT) From: Bill Paul <wpaul@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sys sockio.h src/sys/net if.c src/sbin/ifconfig ifconfig.8 ifconfig.c Message-ID: <200006162014.NAA12344@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
wpaul 2000/06/16 13:14:43 PDT
Modified files:
sys/sys sockio.h
sys/net if.c
sbin/ifconfig ifconfig.8 ifconfig.c
Log:
Implement SIOCSIFLLADDR, which allows you to change the link-level
address on an interface. This basically allows you to do what my
little setmac module/utility does via ifconfig. This involves the
following changes:
socket.h: define SIOCSIFLLADDR
if.c: add support for SIOCSIFLLADDR, which resets the values in
the arpcom struct and sockaddr_dl for the specified interface.
Note that if the interface is already up, we need to down/up
it in order to program the underlying hardware's receive filter.
ifconfig.c: add lladdr command
ifconfig.8: document lladdr command
You can now force the MAC address on any ethernet interface to be
whatever you want. (The change is not sticky across reboots of course:
we don't actually reprogram the EEPROM or anything.) Actually, you
can reprogram the MAC address on other kinds of interfaces too; this
shouldn't be ethernet-specific (though at the moment it's limited to
6 bytes of address data).
Nobody ran up to me and said "this is the politically correct way to
do this!" so I don't want to hear any complaints from people who think
I could have done it more elegantly. Consider yourselves lucky I didn't
do it by having ifconfig tread all over /dev/kmem.
Revision Changes Path
1.15 +2 -1 src/sys/sys/sockio.h
1.87 +31 -1 src/sys/net/if.c
1.29 +11 -1 src/sbin/ifconfig/ifconfig.8
1.52 +27 -2 src/sbin/ifconfig/ifconfig.c
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200006162014.NAA12344>