all: add support for EdgeOS

cmd/ctrld/prog.go

@@ -175,7 +175,10 @@ func (p *prog) setDNS() {
 	switch router.Name() {
 	case router.DDWrt, router.OpenWrt, router.Ubios:
 		// On router, ctrld run as a DNS forwarder, it does not have to change system DNS.
-		// Except for Merlin/Tomato, which has WAN DNS setup on boot for NTP.
+		// Except for:
+		//   + EdgeOS, which /etc/resolv.conf could be managed by vyatta_update_resolv.pl script.
+		//   + Merlin/Tomato, which has WAN DNS setup on boot for NTP.
+		//   + Synology, which /etc/resolv.conf is not configured to point to localhost.
 		return
 	}
 	if cfg.Listener == nil || cfg.Listener["0"] == nil {

cmd/ctrld/prog_linux.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"github.com/kardianos/service"
+
+	"github.com/Control-D-Inc/ctrld/internal/router"
 )
 
 func (p *prog) preRun() {
@@ -17,6 +19,13 @@ func setDependencies(svc *service.Config) {
 		"Wants=NetworkManager-wait-online.service",
 		"After=NetworkManager-wait-online.service",
 	}
+	// On EdeOS, ctrld needs to start after vyatta-dhcpd, so it can read leases file.
+	if router.Name() == router.EdgeOS {
+		svc.Dependencies = append(svc.Dependencies, "Wants=vyatta-dhcpd.service")
+		svc.Dependencies = append(svc.Dependencies, "After=vyatta-dhcpd.service")
+		svc.Dependencies = append(svc.Dependencies, "Wants=dnsmasq.service")
+		svc.Dependencies = append(svc.Dependencies, "After=dnsmasq.service")
+	}
 }
 
 func setWorkingDirectory(svc *service.Config, dir string) {