Hi!
I just noticed (the hard way) a strange behaviour of ifconfig. In short,
if I supply a netmask when removing an alias with ``-alias <address>'',
it is not, as one would expect, ignored, but rather used as the netmask
for the primary address of the interface.
While it would not be necessary to supply the netmask when removing an
alias, I cannot see that this behaviour would be expected. I would
rather expect an error or that the netmask was ignored.
Or am I totally wrong?
Example follows:
$ ifconfig xl0
xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:06:5b:36:f8:e1
groups: egress
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet6 fe80::206:5bff:fe36:f8e1%xl0 prefixlen 64 scopeid 0x1
inet 192.168.2.130 netmask 0xffffff00 broadcast 192.168.2.255
$ sudo ifconfig xl0 inet alias 192.168.2.140 netmask 255.255.255.255
$ ifconfig xl0
xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:06:5b:36:f8:e1
groups: egress
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet6 fe80::206:5bff:fe36:f8e1%xl0 prefixlen 64 scopeid 0x1
inet 192.168.2.130 netmask 0xffffff00 broadcast 192.168.2.255
inet 192.168.2.140 netmask 0xffffffff broadcast 192.168.2.140
$ sudo ifconfig xl0 inet -alias 192.168.2.140 netmask 255.255.255.255
ifconfig: SIOCAIFADDR: File exists
$ ifconfig xl0
xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:06:5b:36:f8:e1
groups: egress
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet6 fe80::206:5bff:fe36:f8e1%xl0 prefixlen 64 scopeid 0x1
inet 192.168.2.130 netmask 0xffffffff broadcast 192.168.2.130
^^^^^^^^^^
madness
/Alexander
