[Dnsmasq-discuss] IP address based on switch port number (option 82)

[Simon Kelley]

Ignacio.Bravo at belden.com wrote:
> Simon Kelley <simon at thekelleys.org.uk> wrote on 16/02/2010 14:27:36:
> 
>> fakeroot debian/rules binary
> I found a problem when fakerooting (sorry for my ignorance) Do I need to 
> install additional tools containing this lib?:
> Package libidn was not found in the pkg-config search path.
> Perhaps you should add the directory containing `libidn.pc'
> to the PKG_CONFIG_PATH environment variable
> No package 'libidn' found

That's a mismatch between what's needed to compile Ubuntu's current 
dnsmasq package and the latest one. the fix is

sudo apt-get install libidn11-dev


>> The magic you need is that you can invert tags, so make the last line
>>
>>
> dhcp-range=net:#switch1,net:#puerto3,10.10.35.40,10.10.35.42,255.255.255.0
>> Then it can only be used when none of the port specific tags are in use.
> 
> The problem I see here is switch1 tag is common to all switch1-ports. So I 
> discard all switch1 ports when I write: net:#switch1
> 
> I feel I need something like: #(switch1ANDport3) instead 
> #(switch1)AND#(port3)
> 
> Is it possible to set something like #(net:switch1,net:port3)? or maybe an 
> OR function so that different conditions (switchANDport) apply to the same 
> range?

Good point. Your requirements exceed what it's currently possible to 
express using the tag system.

Maybe there needs to be something to calculate and arbitrary boolean 
expression on tags

declare-tag set:newtag, !(switch1 & port1)

Joy, the options code finally becomes a full recusive-descent parser.


Let me think about this a bit more.


Simon.

> 
> Thanks
> Ignacio
> 
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