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Code Issues Releases Wiki Activity

ircd::net::dns: Improve the SRV -> A callback chain.

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This commit is contained in:
Jason Volk 2018-04-28 16:46:42 -07:00
parent 4e796c896a
commit 2b41672259
1 changed files with 19 additions and 15 deletions
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34
ircd/net.cc
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@ -2402,34 +2402,38 @@ ircd::net::dns::operator()(const hostport &hp,
callback(std::move(eptr), ipport);
}};
if(!hostport.service)
return operator()(hostport, opts, [hostport, calluser(std::move(calluser))]
if(!hp.service)
return operator()(hp, opts, [hp, calluser(std::move(calluser))]
(std::exception_ptr eptr, const rfc1035::record::A &record)
{
calluser(std::move(eptr), record.ip4, port(hostport));
calluser(std::move(eptr), record.ip4, port(hp));
});
operator()(hostport, opts, [this, hostport(hostport), opts(opts), calluser(std::move(calluser))]
auto srv_opts{opts};
srv_opts.nxdomain_exceptions = false;
operator()(hp, srv_opts, [this, hp(hp), opts(opts), calluser(std::move(calluser))]
(std::exception_ptr eptr, const rfc1035::record::SRV &record)
mutable
{
//TODO: we get NXDOMAIN and it kills the chain..
//if(eptr)
// return callback(std::move(eptr), {});
if(!record.tgt.empty())
host(hostport) = record.tgt;
if(eptr)
return calluser(std::move(eptr), 0, 0);
if(record.port != 0)
port(hostport) = record.port;
port(hp) = record.port;
// Have to kill the service name to not run another SRV query now.
hostport.service = {};
// The host reference in hp has become invalid by the time of this cb.
assert(!record.tgt.empty());
host(hp) = record.tgt;
// Have to kill the service name to not run another SRV query now, and
// these are also invalid references too.
hp.service = {};
opts.srv = {};
this->operator()(hostport, opts, [hostport, calluser(std::move(calluser))]
this->operator()(hp, opts, [hp, calluser(std::move(calluser))]
(std::exception_ptr eptr, const rfc1035::record::A &record)
{
calluser(std::move(eptr), record.ip4, port(hostport));
calluser(std::move(eptr), record.ip4, port(hp));
});
});
}