WIP

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

pkg/wireguard/config.go

@@ -15,19 +15,24 @@ import (
 )
 
 var configTemplate = template.Must(template.New("config").Funcs(template.FuncMap{
-	"StringsJoin": strings.Join,
+	"PrefixJoin": func(a []netip.Prefix, sep string) string {
+		s := make([]string, len(a))
+		for i, p := range a {
+			s[i] = p.String()
+		}
+		return strings.Join(s, sep)
+	},
 }).Parse(`[Interface]
 Address = {{.Interface.Address}}
 PrivateKey = {{.Interface.PrivateKey}}
 ListenPort = {{.Interface.ListenPort}}
-{{range .Peer}}
+{{- range .Peer }}
 
 [Peer]
-# {{.Endpoint.Name}}
 PublicKey = {{.PublicKey}}
 Endpoint = {{.Endpoint}}
-AllowedIPs = {{ StringsJoin .AllowedIPs ", "}}
-{{end}}
+AllowedIPs = {{ PrefixJoin .AllowedIPs ", "}}
+{{- end }}
 `))
 
 // Config represents a wgN.conf file

pkg/zones/machine.go

@@ -61,6 +61,11 @@ func (m *Machine) SetGateway(enabled bool) error {
 	return m.SyncWireguardConfig(0)
 }
 
+// Zone indicates the [Zone] this machine belongs to
+func (m *Machine) Zone() int {
+	return m.zone.ID
+}
+
 func (m *Machine) getPeerByName(name string) (*Machine, bool) {
 	return m.zone.zones.GetMachineByName(name)
 }

pkg/zones/machine_rings.go

@@ -268,22 +268,23 @@ func (m *Machine) SyncWireguardConfig(ring int) error {
 	return m.zone.SyncWireguardConfig(ring)
 }
 
+// WriteWireguardConfig ...
 func (m *Machine) WriteWireguardConfig(ring int) error {
-	r, err := m.zone.GetRing(ring)
+	r, err := NewRing(m.zone, ring)
 	if err != nil {
 		return err
 	}
 
-	return m.writeWireguardRing(r)
+	return m.writeWireguardRingConfig(r)
 }
 
-func (m *Machine) writeWireguardRing(r *Ring) error {
-	wg, err := r.ExportConfig(m.ID)
+func (m *Machine) writeWireguardRingConfig(r *Ring) error {
+	wg, err := r.ExportConfig(m)
 	if err != nil {
 		return nil
 	}
 
-	f, err := m.CreateTruncFile("wg%v.conf", r.Ring)
+	f, err := m.CreateTruncFile("wg%v.conf", r.ID)
 	if err != nil {
 		return err
 	}

pkg/zones/rings.go

@@ -2,6 +2,7 @@ package zones
 
 import (
 	"fmt"
+	"io/fs"
 	"net/netip"
 
 	"git.jpi.io/amery/jpictl/pkg/wireguard"
@@ -175,7 +176,178 @@ func RingOneAddress(zoneID, nodeID int) (netip.Addr, bool) {
 	case !ValidZoneID(zoneID) || !ValidNodeID(nodeID):
 		return netip.Addr{}, false
 	default:
-		a4 := [4]uint8{10, 0, uint8(zoneID << 4), uint8(nodeID)}
+		a4 := [4]uint8{10, uint8(zoneID << 4), 0, uint8(nodeID)}
 		return netip.AddrFrom4(a4), true
 	}
 }
+
+var (
+	_ MachineIterator = (*Ring)(nil)
+)
+
+// A Ring describes all peers on a ring
+type Ring struct {
+	RingAddressEncoder
+
+	Peers []*RingPeer
+}
+
+// AddPeer adds a [Machine] to the ring
+func (r *Ring) AddPeer(p *Machine) bool {
+	_, ok := p.getRingInfo(r.ID)
+	if !ok {
+		return false
+	}
+
+	rp := r.newPeer(p)
+	r.Peers = append(r.Peers, rp)
+	return true
+}
+
+func (r *Ring) newPeer(p *Machine) *RingPeer {
+	nodeID := p.ID
+	zoneID := p.Zone()
+
+	ri, _ := p.getRingInfo(r.ID)
+	addr, _ := r.Encode(zoneID, nodeID)
+
+	rp := &RingPeer{
+		Node:       p,
+		Address:    addr,
+		PrivateKey: ri.Keys.PrivateKey,
+		PeerConfig: wireguard.PeerConfig{
+			PublicKey: ri.Keys.PublicKey,
+			Endpoint: wireguard.EndpointAddress{
+				Host: p.FullName(),
+				Port: r.Port,
+			},
+		},
+	}
+
+	if r.ID == 0 {
+		rp.AllowRingOneNetwork(zoneID)
+		rp.AllowIP(addr)
+	} else {
+		rp.AllowIP(addr)
+
+		if p.IsGateway() {
+			zones := p.zone.zones
+			rp.AllowOtherRingOneNetworks(zones, zoneID)
+			rp.AllowRingZeroGateways(zones)
+		}
+	}
+
+	return rp
+}
+
+// ForEachMachine calls a function for each Machine in the ring
+// until instructed to terminate the loop
+func (r *Ring) ForEachMachine(fn func(*Machine) bool) {
+	for _, pp := range r.Peers {
+		if fn(pp.Node) {
+			return
+		}
+	}
+}
+
+// ExportConfig ...
+func (r *Ring) ExportConfig(p *Machine) (*wireguard.Config, error) {
+	cur, ok := r.getMachine(p)
+	if !ok {
+		return nil, fs.ErrNotExist
+	}
+
+	out := &wireguard.Config{
+		Interface: wireguard.InterfaceConfig{
+			Address:    cur.Address,
+			PrivateKey: cur.PrivateKey,
+			ListenPort: r.Port,
+		},
+	}
+
+	for _, pp := range r.Peers {
+		if pp.Node != p {
+			pc := pp.PeerConfig
+			out.Peer = append(out.Peer, pc)
+		}
+	}
+	return out, nil
+}
+
+func (r *Ring) getMachine(p *Machine) (*RingPeer, bool) {
+	for _, pp := range r.Peers {
+		if pp.Node == p {
+			return pp, true
+		}
+	}
+
+	return nil, false
+}
+
+// A RingPeer is a node on a [Ring]
+type RingPeer struct {
+	Node *Machine
+
+	Address    netip.Addr
+	PrivateKey wireguard.PrivateKey
+	PeerConfig wireguard.PeerConfig
+}
+
+// AllowIP ...
+func (rp *RingPeer) AllowIP(addr netip.Addr) {
+	rp.PeerConfig.AllowedIPs = append(rp.PeerConfig.AllowedIPs,
+		netip.PrefixFrom(addr, 32),
+	)
+}
+
+// AllowNetwork ...
+func (rp *RingPeer) AllowNetwork(addr netip.Addr, bits int) {
+	rp.PeerConfig.AllowedIPs = append(rp.PeerConfig.AllowedIPs,
+		netip.PrefixFrom(addr, bits),
+	)
+}
+
+// AllowRingOneNetwork ...
+func (rp *RingPeer) AllowRingOneNetwork(zoneID int) {
+	addr, _ := RingOneAddress(zoneID, 0)
+	rp.AllowNetwork(addr, 12)
+}
+
+// AllowOtherRingOneNetworks ...
+func (rp *RingPeer) AllowOtherRingOneNetworks(m *Zones, zoneID int) {
+	m.ForEachZone(func(z *Zone) bool {
+		if z.ID != zoneID {
+			addr, _ := RingOneAddress(z.ID, 0)
+			rp.AllowNetwork(addr, 12)
+		}
+		return false
+	})
+}
+
+// AllowRingZeroGateways ...
+func (rp *RingPeer) AllowRingZeroGateways(m *Zones) {
+	m.ForEachMachine(func(p *Machine) bool {
+		switch {
+		case !p.IsGateway():
+			// skip regular nodes
+		default:
+			addr, _ := RingZeroAddress(p.Zone(), p.ID)
+			rp.AllowIP(addr)
+		}
+		return false
+	})
+}
+
+// NewRing ...
+func NewRing(m MachineIterator, ring int) (*Ring, error) {
+	r := &Ring{
+		RingAddressEncoder: Rings[ring],
+	}
+
+	m.ForEachMachine(func(p *Machine) bool {
+		r.AddPeer(p)
+		return false
+	})
+
+	return r, nil
+}

pkg/zones/zone_rings.go

@@ -1,39 +1,88 @@
 package zones
 
 import (
+	"io/fs"
 	"os"
-
-	"git.jpi.io/amery/jpictl/pkg/wireguard"
 )
 
-type Ring struct {
-	Ring int
-}
+var (
+	_ machineRinger = (*Zone)(nil)
+	_ machineRinger = (*Zones)(nil)
+)
 
-func (*Ring) ExportConfig(_ int) (*wireguard.Config, error) {
-	return nil, nil
-}
+type machineRinger interface {
+	MachineIterator
 
-func (*Zone) GetRing(_ int) (*Ring, error) {
-	return &Ring{}, nil
+	PruneWireguardConfig(ring int) error
 }
 
 // SyncWireguardConfig updates all wgN.conf files for the specified
 // ring
 func (z *Zone) SyncWireguardConfig(ring int) error {
-	err := z.PruneWireguardConfig(ring)
+	switch ring {
+	case 0:
+		return syncWireguardConfig(z.zones, ring)
+	case 1:
+		return syncWireguardConfig(z, ring)
+	default:
+		return fs.ErrInvalid
+	}
+}
+
+// PruneWireguardConfig removes wgN.conf files of machines with
+// the corresponding ring disabled.
+func (z *Zone) PruneWireguardConfig(ring int) error {
+	return pruneWireguardConfig(z, ring)
+}
+
+// WriteWireguardKeys rewrites all wgN.{key,pub} files on this zone
+func (z *Zone) WriteWireguardKeys(ring int) error {
+	return writeWireguardKeys(z, ring)
+}
+
+// SyncWireguardConfig updates all wgN.conf files for the specified
+// ring
+func (m *Zones) SyncWireguardConfig(ring int) error {
+	switch ring {
+	case 0:
+		return syncWireguardConfig(m, ring)
+	case 1:
+		var err error
+		m.ForEachZone(func(z *Zone) bool {
+			err = syncWireguardConfig(z, ring)
+			return err != nil
+		})
+		return err
+	default:
+		return fs.ErrInvalid
+	}
+}
+
+// PruneWireguardConfig removes wgN.conf files of machines with
+// the corresponding ring disabled on all zones
+func (m *Zones) PruneWireguardConfig(ring int) error {
+	return pruneWireguardConfig(m, ring)
+}
+
+// WriteWireguardKeys rewrites all wgN.{key,pub} files
+func (m *Zones) WriteWireguardKeys(ring int) error {
+	return writeWireguardKeys(m, ring)
+}
+
+func syncWireguardConfig(m machineRinger, ring int) error {
+	err := m.PruneWireguardConfig(ring)
 	if err != nil {
 		return err
 	}
 
-	r, err := z.GetRing(ring)
+	r, err := NewRing(m, ring)
 	if err != nil {
 		return err
 	}
 
-	z.ForEachMachine(func(p *Machine) bool {
+	m.ForEachMachine(func(p *Machine) bool {
 		if _, ok := p.getRingInfo(ring); ok {
-			err = p.writeWireguardRing(r)
+			err = p.writeWireguardRingConfig(r)
 		}
 		return err != nil
 	})
@@ -41,12 +90,10 @@ func (z *Zone) SyncWireguardConfig(ring int) error {
 	return err
 }
 
-// PruneWireguardConfig removes wgN.conf files of machines with
-// the corresponding ring disabled.
-func (z *Zone) PruneWireguardConfig(ring int) error {
+func pruneWireguardConfig(m MachineIterator, ring int) error {
 	var err error
 
-	z.ForEachMachine(func(p *Machine) bool {
+	m.ForEachMachine(func(p *Machine) bool {
 		_, ok := p.getRingInfo(ring)
 		if !ok {
 			err = p.RemoveWireguardConfig(ring)
@@ -57,11 +104,10 @@ func (z *Zone) PruneWireguardConfig(ring int) error {
 	return err
 }
 
-// WriteWireguardKeys rewrites all wgN.{key,pub} files on this zone
-func (z *Zone) WriteWireguardKeys(ring int) error {
+func writeWireguardKeys(m MachineIterator, ring int) error {
 	var err error
 
-	z.ForEachMachine(func(p *Machine) bool {
+	m.ForEachMachine(func(p *Machine) bool {
 		err = p.WriteWireguardKeys(ring)
 		if os.IsNotExist(err) {
 			// ignore
@@ -73,38 +119,3 @@ func (z *Zone) WriteWireguardKeys(ring int) error {
 
 	return err
 }
-
-// PruneWireguardConfig removes wgN.conf files of machines with
-// the corresponding ring disabled on all zones
-func (m *Zones) PruneWireguardConfig(ring int) error {
-	var err error
-
-	m.ForEachZone(func(z *Zone) bool {
-		err = z.PruneWireguardConfig(ring)
-		return err != nil
-	})
-
-	return err
-}
-
-// WriteWireguardKeys rewrites all wgN.{key,pub} files
-func (m *Zones) WriteWireguardKeys(ring int) error {
-	var err error
-
-	m.ForEachZone(func(z *Zone) bool {
-		err = z.WriteWireguardKeys(ring)
-		return err != nil
-	})
-
-	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
-	}
-
-}

pkg/zones/zones.go

@@ -10,6 +10,16 @@ import (
 	"darvaza.org/resolver"
 )
 
+var (
+	_ MachineIterator = (*Zone)(nil)
+	_ MachineIterator = (*Zones)(nil)
+)
+
+// A MachineIterator is a set of Machines we can iterate on
+type MachineIterator interface {
+	ForEachMachine(func(*Machine) bool)
+}
+
 // Zone represents one zone in a cluster
 type Zone struct {
 	zones *Zones