zones: WIP

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/zones/machine_scan.go

@@ -1,11 +1,86 @@
 package zones
 
 import (
+	"bytes"
 	"context"
+	"fmt"
+	"log"
 	"net/netip"
+	"os"
 	"time"
+
+	"git.jpi.io/amery/jpictl/pkg/wireguard"
 )
 
+// GetWireguardConfig reads a wgN.conf file
+func (m *Machine) GetWireguardConfig(ring int) (*wireguard.Config, error) {
+	data, err := m.ReadFile("wg%v.conf", ring)
+	if err != nil {
+		return nil, err
+	}
+
+	r := bytes.NewReader(data)
+	return wireguard.NewConfigFromReader(r)
+}
+
+func (m *Machine) tryWireguardZeroConfig() error {
+	wg, err := m.GetWireguardConfig(0)
+	switch {
+	case os.IsNotExist(err):
+		return nil
+	case err != nil:
+		return err
+	default:
+		return m.applyWireguardZeroConfig(wg)
+	}
+}
+
+func (m *Machine) applyWireguardZeroConfig(wg *wireguard.Config) error {
+	addr := wg.GetAddress()
+	zoneID, nodeID, ok := ParseRingZeroAddress(addr)
+	if !ok {
+		return fmt.Errorf("%s: invalid %s address: %s", m.Name, "wg1", addr)
+	}
+
+	if err := m.applyZoneNodeID(zoneID, nodeID); err != nil {
+		return err
+	}
+
+	log.Println(m.Name, "wg0", addr, zoneID, nodeID)
+	return nil
+}
+
+func (m *Machine) tryWireguardOneConfig() error {
+	wg, err := m.GetWireguardConfig(1)
+	switch {
+	case os.IsNotExist(err):
+		return nil
+	case err != nil:
+		return err
+	default:
+		return m.applyWireguardOneConfig(wg)
+	}
+}
+
+func (m *Machine) applyWireguardOneConfig(wg *wireguard.Config) error {
+	addr := wg.GetAddress()
+	zoneID, nodeID, ok := ParseRingOneAddress(addr)
+	if !ok {
+		return fmt.Errorf("%s: invalid %s address: %s", m.Name, "wg1", addr)
+	}
+
+	if err := m.applyZoneNodeID(zoneID, nodeID); err != nil {
+		return err
+	}
+
+	log.Println(m.Name, "wg1", addr, zoneID, nodeID)
+	return nil
+}
+
+func (*Machine) applyZoneNodeID(_, _ int) error {
+	return nil
+}
+
 func (m *Machine) lookupNetIP() ([]netip.Addr, error) {
 	timeout := 2 * time.Second
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
@@ -26,5 +101,13 @@ func (m *Machine) updatePublicAddresses() error {
 }
 
 func (m *Machine) scan() error {
+	if err := m.tryWireguardZeroConfig(); err != nil {
+		return err
+	}
+
+	if err := m.tryWireguardOneConfig(); err != nil {
+		return err
+	}
+
 	return m.updatePublicAddresses()
 }