Hi On Sat, 1 May 2021 at 07:43, cont...@benoit-laviale.fr < cont...@benoit-laviale.fr> wrote:
> Dear all, > > I am working on twisted names since some days to make kind of filtering > system (with domains blacklists). > So I made my own resolver that can reply defer.fail(error.DomainError()) > to send the query to the next resolver (and in this case, it will be > resolve) or defer.fail(dns.AuthoritativeDomainError(query.name.name)) to > reply NXDOMAIN that can "block" the domain to the final client. > > That part is working well. > > Next, i would like to "block" the resolution regarding the device (Mac > address/IP/???). > > I would like something like that : > > if self.query.meta.client.ip == b"192.168.0.5" or > self.query.meta.client.mac == "XX:YY:ZZ:....": > self.do_something() > > My use case is that device of Kelly, (Kelly is a teenager of 12 years) > cant use youtube.com at all, but other devices are allowed to get the > resolution. > How can I get the IP/Name/mac (an identifier) of the device that's > querying my custom dns? > I read something about datagrams, but in my case i think i must get this > information in my resolver... > > Thx and cheers. > I think you are using DNS over UDP... so to understand how UDP works with Twisted you can check this page https://twistedmatrix.com/documents/current/core/howto/udp.html I have never used Twisted names so I am just trying to help based on my general knowledge of Twisted design ... but I think the entry point is here https://github.com/twisted/twisted/blob/63649469c1fe46d8a713e8034239ac3cc0498ea7/src/twisted/names/dns.py#L3242 then it goes to here https://github.com/twisted/twisted/blob/63649469c1fe46d8a713e8034239ac3cc0498ea7/src/twisted/names/server.py#L538 and then in handleQuery where I see that the query is done without the `address`...but the address is available again in `gotResolverResponse`.. so maybe that help ------- Hope it helps Cheers -- Adi Roiban
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