Use internal/pkg structure

1 files changed, 33 insertions, 0 deletions

diff --git a/internal/network/ip.go b/internal/network/ip.go
new file mode 100644
index 0000000..0c6451e
--- /dev/null
+++ b/internal/network/ip.go
@@ -0,0 +1,33 @@
+package network
+
+import (
+	"fmt"
+	"log/slog"
+	"math/rand"
+	"net"
+)
+
+func GetOutboundIP() net.IP {
+	conn, err := net.Dial("udp", "8.8.8.8:80")
+	if err != nil {
+		slog.Error("err", err)
+	}
+	defer conn.Close()
+
+	localAddr := conn.LocalAddr().(*net.UDPAddr)
+
+	return localAddr.IP
+}
+
+func GetRandomAvailablePort() (int, error) {
+	for i := 0; i < 100; i += 1 {
+		port := rand.Intn(65535-1024) + 1024
+		addr := fmt.Sprintf(":%d", port)
+		ln, err := net.Listen("tcp", addr)
+		if err == nil {
+			defer ln.Close()
+			return port, nil
+		}
+	}
+	return 0, fmt.Errorf("failed to find an available port after multiple attempts")
+}