Added timeout to read failure in rdpControlConn to avoid spinning on error.

peer/control_conn.go

@@ -4,6 +4,7 @@ import (
 	"log"
 	"net"
 	"net/netip"
+	"time"
 
 	"vppn/peer/control"
 )
@@ -32,11 +33,14 @@ func (c *udpControlConn) SendPing(dst netip.AddrPort, ping control.Ping, buf []b
 // run reads incoming ping packets and forwards them to ch until ctx is done.
 // Call this in a goroutine before starting the App event loop.
 func (c *udpControlConn) run(ch chan<- PingEvent) {
+	const errorTimeout = 8 * time.Second
+
 	var buf [control.Size]byte
 	for {
 		n, src, err := c.conn.ReadFromUDP(buf[:])
 		if err != nil {
 			log.Printf("control read: %v", err)
+			time.Sleep(errorTimeout)
 			continue
 		}
 

peer/wginterface/interface.go

@@ -175,7 +175,7 @@ func nlAttr(attrType uint16, data []byte) []byte {
 
 func ioctlSetAddr(name string, ip net.IP, prefixLen int) error {
 	if ip.To4() == nil {
-		return errors.New("attempted to set nil IP on interface")
+		return errors.New("attempted to set non-IPv4 address on interface")
 	}
 
 	fd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, unix.IPPROTO_IP)