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all: rework fetching/generating config in cd mode

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Config fetching/generating in cd mode is currently weird, error prone,
and easy for user to break ctrld when using custom config.

This commit reworks the flow:

 - Fetching config from Control D API.
 - No custom config, use the current default config.
 - If custom config presents, but there's no listener, use 0.0.0.0:53.
 - Try listening on current ip+port config, if ok, ctrld could be a
   direct listener with current setup, moving on.
 - If failed, trying 127.0.0.1:53.
 - If failed, trying current ip + port 5354
 - If still failed, pick a random ip:port pair, retry until listening ok.

With this flow, thing is more predictable/stable, and help removing the
Config interface for router.
This commit is contained in:
Cuong Manh Le
2023-08-09 23:54:23 +07:00
committed by Cuong Manh Le
parent 3f3c1d6d78
commit 7af59ee589
23 changed files with 442 additions and 344 deletions
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internal/router/firewalla/firewalla.go
-6
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@@ -53,12 +53,6 @@ func (f *Firewalla) PreRun() error {
return nil
}
func (f *Firewalla) Configure() error {
f.cfg.Listener["0"].IP = "0.0.0.0"
f.cfg.Listener["0"].Port = 5354
return nil
}
func (f *Firewalla) Setup() error {
data, err := dnsmasq.FirewallaConfTmpl(dnsmasq.ConfigContentTmpl, f.cfg)
if err != nil {