mknod permission denied

[dashesy]

I am using (2.6.32-29-generic #58-Ubuntu SMP Fri Feb 11 20:52:10 UTC 2011 x86_64 GNU/Linux)

I have created a character device, the module compiles and instmod is successful.

make
sudo instmod mymod.ko

grep mymod /proc/devices | cut -b1-3

returns 250 (major number).
To install my module I want to use mknod, because it is proprietary and udev does not like this fact (I am trying to make it GPL but need company acceptance).
I can do this fine:

sudo mknod -m 666 /dev/mymod c 250 0

I am just curious why I need to pass the permission 666, isn't that the default for mknod?
the man says

set file permission bits to MODE, not a=rw - umask

If I remove the mode switch i.e.:

sudo mknod /dev/mymod c 250 0

will give me "permission denied" message.

thanks

[Rubberman]

I don't understand - udev should not be concerned with your license. What problem are you having with it. As for mknod, I think the default is your umask setting, which is probably not 666.