control: Replace host parameters in exported clients

python/test/test_logic_control.py

@@ -193,7 +193,7 @@ async def test_resolve(asyncloop, path_srcdir):
 channel:
   url: control://;tll.channel.processor=processor;tll.channel.resolve=resolve;name=logic
   service: test
-  hostname: host
+  hostname: ::1
   service-tags: 'a,b'
 ''')
 
@@ -202,11 +202,11 @@ async def test_resolve(asyncloop, path_srcdir):
 
     tproc, tinput = mock.io('processor', 'resolve')
 
-    tcp = asyncloop.Channel(f'child-export+tcp://::1:{ports.TCP6};mode=server;name=tcp;tll.resolve.export=yes')
+    tcp = asyncloop.Channel(f'child-export+tcp://*:{ports.TCP6};mode=server;name=tcp;tll.resolve.export=yes')
     tcp.open()
 
     m = await tinput.recv()
-    assert tinput.unpack(m).as_dict() == {'service': 'test', 'tags': ['a', 'b'], 'host': 'host'}
+    assert tinput.unpack(m).as_dict() == {'service': 'test', 'tags': ['a', 'b'], 'host': '::1'}
 
     tproc.post({'channel': 'tcp', 'state': 'Active'}, name='StateUpdate')
     for name in ('tcp', 'tcp/first', 'tcp/first/second'):

src/logic/control.cc

@@ -472,10 +472,16 @@ int Control::_post_export(ChannelExport &channel, std::string_view name, const t
 	data.set_service(_service);
 	data.set_channel(name);
 	std::map<std::string, tll::ConstConfig> curl;
+
 	for (auto & [name, cfg] : client.browse("**")) {
 		if (name.substr(0, strlen("children.")) != "children.")
 			curl.emplace(name, cfg);
 	}
+	tll::Config hostname;
+	hostname.set(_hostname);
+	for (auto & [k, _]: client.browse("replace.host.**"))
+		curl[std::string(k.substr(strlen("replace.host.")))] = hostname;
+
 	data.get_config().resize(curl.size());
 	auto di = data.get_config().begin();
 	for (auto & [name, cfg] : curl) {