Hello, I would like to ask some help, I'm looking at the OpenVPN source tree from GitHub as I would like to see how much effort would it be me to add SRV record support, as it has increasing demand these days (and really makes sense, especially for enterprises).
So, the question is, what would be the best place to hook up the support for SRV records? SRV record mechanism/requirements are the following: - It's protocol-specific, so at lookup time it has to be known whether it's for UDP or TCP - The SRV records supply the service port, so in this case it's not taken from the configuration file. - Basically for a service it's one or more DNS records in the following format: _service._proto.name. TTL class SRV priority weight port target. I guess _service should be _openvpn, _proto is either _tcp or _udp. port is obvious, and target is the target host to connect to using the previously specified port. If there are multiple records, then priority makes sense, first the hosts with the lowest values have to be tried, then rest increasingly If there are multiple hosts with the same priority then weight kicks in, a host to be chosen is determined by the weight factors. Attempts to a different priority can be made after all hosts from this priority are exhausted. So, basically first there has to be a lookup against the server's SRV record, once that lookup returned results, and the priority/weight algorithm returns the first candidate, the existing connection mechanism can be used to check it. If it succeeds, life goes on as it is currently, if it fails, then the prio/weight algorithm's next target has to be tried. So, where should I be looking at the source that would probably be a good place to hook this up? Thanks in advance, Gergely PS: Please see the wikipedia article on SRV records: https://en.wikipedia.org/wiki/SRV_record
