feat: Waku v2 bridge

Issue #12610

vendor/github.com/pion/turn/v2/internal/client/permission.go

@@ -0,0 +1,90 @@
+package client
+
+import (
+	"net"
+	"sync"
+	"sync/atomic"
+)
+
+type permState int32
+
+const (
+	permStateIdle permState = iota
+	permStatePermitted
+)
+
+type permission struct {
+	st    permState    // thread-safe (atomic op)
+	mutex sync.RWMutex // thread-safe
+}
+
+func (p *permission) setState(state permState) {
+	atomic.StoreInt32((*int32)(&p.st), int32(state))
+}
+
+func (p *permission) state() permState {
+	return permState(atomic.LoadInt32((*int32)(&p.st)))
+}
+
+// Thread-safe permission map
+type permissionMap struct {
+	permMap map[string]*permission
+	mutex   sync.RWMutex
+}
+
+func (m *permissionMap) insert(addr net.Addr, p *permission) bool {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	udpAddr, ok := addr.(*net.UDPAddr)
+	if !ok {
+		return false
+	}
+
+	m.permMap[udpAddr.IP.String()] = p
+	return true
+}
+
+func (m *permissionMap) find(addr net.Addr) (*permission, bool) {
+	m.mutex.RLock()
+	defer m.mutex.RUnlock()
+
+	udpAddr, ok := addr.(*net.UDPAddr)
+	if !ok {
+		return nil, false
+	}
+
+	p, ok := m.permMap[udpAddr.IP.String()]
+	return p, ok
+}
+
+func (m *permissionMap) delete(addr net.Addr) {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	udpAddr, ok := addr.(*net.UDPAddr)
+	if !ok {
+		return
+	}
+
+	delete(m.permMap, udpAddr.IP.String())
+}
+
+func (m *permissionMap) addrs() []net.Addr {
+	m.mutex.RLock()
+	defer m.mutex.RUnlock()
+
+	addrs := []net.Addr{}
+	for k := range m.permMap {
+		addrs = append(addrs, &net.UDPAddr{
+			IP: net.ParseIP(k),
+		})
+	}
+	return addrs
+}
+
+func newPermissionMap() *permissionMap {
+	return &permissionMap{
+		permMap: map[string]*permission{},
+	}
+}