From 09678d8eb862c5973eae847c807e454e8757550b Mon Sep 17 00:00:00 2001
From: Alejandro Mery <amery@jpi.io>
Date: Fri, 25 Aug 2023 17:40:42 +0000
Subject: [PATCH] WIP

Signed-off-by: Alejandro Mery <amery@jpi.io>
---
 pkg/zones/machine.go       | 18 ++++++++++++++
 pkg/zones/machine_rings.go | 51 ++++++++++++++++++++++++++++++++++++++
 pkg/zones/sync.go          |  4 +--
 pkg/zones/zone_rings.go    | 51 +++++++++++++++++++++++++++++++++++++-
 4 files changed, 121 insertions(+), 3 deletions(-)

diff --git a/pkg/zones/machine.go b/pkg/zones/machine.go
index 4f0c736..a1162e6 100644
--- a/pkg/zones/machine.go
+++ b/pkg/zones/machine.go
@@ -43,6 +43,24 @@ func (m *Machine) IsGateway() bool {
 	return ok
 }
 
+// SetGateway enables/disables a Machine ring0 integration
+func (m *Machine) SetGateway(enabled bool) error {
+	ri, found := m.getRingInfo(0)
+	switch {
+	case !found && !enabled:
+		return nil
+	case !found:
+		var err error
+
+		if ri, err = m.createRingInfo(0, false); err != nil {
+			return err
+		}
+	}
+
+	ri.Enabled = enabled
+	return m.SyncWireguardConfig(0)
+}
+
 func (m *Machine) getPeerByName(name string) (*Machine, bool) {
 	return m.zone.zones.GetMachineByName(name)
 }
diff --git a/pkg/zones/machine_rings.go b/pkg/zones/machine_rings.go
index bd67099..e1121c5 100644
--- a/pkg/zones/machine_rings.go
+++ b/pkg/zones/machine_rings.go
@@ -261,3 +261,54 @@ func (m *Machine) RemoveWireguardConfig(ring int) error {
 
 	return err
 }
+
+// SyncWireguardConfig updates all wgN.conf files for the specified
+// ring
+func (m *Machine) SyncWireguardConfig(ring int) error {
+	return m.zone.SyncWireguardConfig(ring)
+}
+
+func (m *Machine) WriteWireguardConfig(ring int) error {
+	r, err := m.zone.GetRing(ring)
+	if err != nil {
+		return err
+	}
+
+	return m.writeWireguardRing(r)
+}
+
+func (m *Machine) writeWireguardRing(r *Ring) error {
+	wg, err := r.ExportConfig(m.ID)
+	if err != nil {
+		return nil
+	}
+
+	f, err := m.CreateTruncFile("wg%v.conf", r.Ring)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	_, err = wg.WriteTo(f)
+	return err
+}
+
+func (m *Machine) createRingInfo(ring int, enabled bool) (*RingInfo, error) {
+	keys, err := wireguard.NewKeyPair()
+	if err != nil {
+		return nil, err
+	}
+
+	ri := &RingInfo{
+		Ring:    ring,
+		Enabled: enabled,
+		Keys:    keys,
+	}
+
+	err = m.applyRingInfo(ring, ri)
+	if err != nil {
+		return nil, err
+	}
+
+	return ri, nil
+}
diff --git a/pkg/zones/sync.go b/pkg/zones/sync.go
index 76e3776..71b8951 100644
--- a/pkg/zones/sync.go
+++ b/pkg/zones/sync.go
@@ -18,12 +18,12 @@ func (m *Zones) SyncAllWireguard() error {
 	var err error
 
 	for ring := 0; ring < RingsCount; ring++ {
-		err = m.PruneWireguardConfig(ring)
+		err = m.WriteWireguardKeys(ring)
 		if err != nil {
 			return err
 		}
 
-		err = m.WriteWireguardKeys(ring)
+		err = m.SyncWireguardConfig(ring)
 		if err != nil {
 			return err
 		}
diff --git a/pkg/zones/zone_rings.go b/pkg/zones/zone_rings.go
index 4bd2e3b..a55d969 100644
--- a/pkg/zones/zone_rings.go
+++ b/pkg/zones/zone_rings.go
@@ -1,6 +1,45 @@
 package zones
 
-import "os"
+import (
+	"os"
+
+	"git.jpi.io/amery/jpictl/pkg/wireguard"
+)
+
+type Ring struct {
+	Ring int
+}
+
+func (*Ring) ExportConfig(_ int) (*wireguard.Config, error) {
+	return nil, nil
+}
+
+func (*Zone) GetRing(_ int) (*Ring, error) {
+	return &Ring{}, nil
+}
+
+// SyncWireguardConfig updates all wgN.conf files for the specified
+// ring
+func (z *Zone) SyncWireguardConfig(ring int) error {
+	err := z.PruneWireguardConfig(ring)
+	if err != nil {
+		return err
+	}
+
+	r, err := z.GetRing(ring)
+	if err != nil {
+		return err
+	}
+
+	z.ForEachMachine(func(p *Machine) bool {
+		if _, ok := p.getRingInfo(ring); ok {
+			err = p.writeWireguardRing(r)
+		}
+		return err != nil
+	})
+
+	return err
+}
 
 // PruneWireguardConfig removes wgN.conf files of machines with
 // the corresponding ring disabled.
@@ -59,3 +98,13 @@ func (m *Zones) WriteWireguardKeys(ring int) error {
 
 	return err
 }
+
+// SyncWireguardConfig updates all wgN.conf files for the specified
+// ring
+func (m *Zones) SyncWireguardConfig(ring int) error {
+	err := m.PruneWireguardConfig(ring)
+	if err != nil {
+		return err
+	}
+
+}