make some consts default

const.go

@@ -1,11 +1,10 @@
 package dsnet
 
-// TODO allow env override (vars) as soon as someone needs it. Probably won't
-// for ages, default interface name + locations are generally fine unless
-// multiple VPNs are needed
-
 const (
-	INTERFACE_NAME = "dsnet"
+	// these end up in the config file
+	DEFAULT_INTERFACE_NAME = "dsnet"
+	DEFAULT_REPORT_FILE = "/var/lib/dsnet-report.json"
+
+	// could be overridden in future via env
 	CONFIG_FILE = "/etc/dsnet-config.json"
-	REPORT_FILE = "/var/lib/dsnet-report.json"
 )

types.go

@@ -54,6 +54,7 @@ type DsnetConfig struct {
 	// IP network from which to allocate automatic sequential addresses
 	//Network net.IPNet
 	// TODO: use ParseCIDR to parse config
+	// Network is chosen randomly when not specified
 	Network string            `validate:"required,cidr"`
 	// domain to append to hostnames. Relies on separate DNS server for
 	// resolution. Informational only.