wip: migrate to mono-repo. SPN has already been moved to spn/

service/netenv/main.go

@@ -0,0 +1,72 @@
+package netenv
+
+import (
+	"github.com/tevino/abool"
+
+	"github.com/safing/portbase/log"
+	"github.com/safing/portbase/modules"
+)
+
+// Event Names.
+const (
+	ModuleName               = "netenv"
+	NetworkChangedEvent      = "network changed"
+	OnlineStatusChangedEvent = "online status changed"
+)
+
+var module *modules.Module
+
+func init() {
+	module = modules.Register(ModuleName, prep, start, nil)
+	module.RegisterEvent(NetworkChangedEvent, true)
+	module.RegisterEvent(OnlineStatusChangedEvent, true)
+}
+
+func prep() error {
+	checkForIPv6Stack()
+
+	if err := registerAPIEndpoints(); err != nil {
+		return err
+	}
+
+	if err := prepOnlineStatus(); err != nil {
+		return err
+	}
+
+	return prepLocation()
+}
+
+func start() error {
+	module.StartServiceWorker(
+		"monitor network changes",
+		0,
+		monitorNetworkChanges,
+	)
+
+	module.StartServiceWorker(
+		"monitor online status",
+		0,
+		monitorOnlineStatus,
+	)
+
+	return nil
+}
+
+var ipv6Enabled = abool.NewBool(true)
+
+// IPv6Enabled returns whether the device has an active IPv6 stack.
+// This is only checked once on startup in order to maintain consistency.
+func IPv6Enabled() bool {
+	return ipv6Enabled.IsSet()
+}
+
+func checkForIPv6Stack() {
+	_, v6IPs, err := GetAssignedAddresses()
+	if err != nil {
+		log.Warningf("netenv: failed to get assigned addresses to check for ipv6 stack: %s", err)
+		return
+	}
+
+	// Set IPv6 as enabled if any IPv6 addresses are found.
+	ipv6Enabled.SetTo(len(v6IPs) > 0)
+}