adding an event

Signed-off-by: h4l0gen <[email protected]>

events/helper/combined_server_client.go

@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+Copyright (C) 2023 The Falco Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package helper
+
+import (
+	"net"
+	"time"
+
+	"github.com/falcosecurity/event-generator/events"
+)
+
+var _ = events.Register(CombinedServerClient)
+
+func CombinedServerClient(h events.Helper) error {
+	errCh := make(chan error)
+	go func() {
+		errCh <- runServer()
+	}()
+
+	time.Sleep(1 * time.Second)
+	return runClient()
+}
+
+func runServer() error {
+	serverAddr, err := net.ResolveUDPAddr("udp", ":80")
+	if err != nil {
+		return err
+	}
+
+	serverConn, err := net.ListenUDP("udp", serverAddr)
+	if err != nil {
+		return err
+	}
+
+	defer serverConn.Close()
+	buf := make([]byte, 1024)
+	_, _, err = serverConn.ReadFromUDP(buf)
+	return err
+}
+
+func runClient() error {
+	serverAddr, err := net.ResolveUDPAddr("udp", "localhost:80")
+	if err != nil {
+		return err
+	}
+
+	clientConn, err := net.DialUDP("udp", nil, serverAddr)
+	if err != nil {
+		return err
+	}
+	defer clientConn.Close()
+
+	data := []byte{0xCA, 0xFE, 0xBA, 0xBE}
+	_, err = clientConn.Write(data)
+	if err != nil {
+		return err
+	}
+	return nil
+}

events/syscall/java_process_class_file_download.go

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+Copyright (C) 2024 The Falco Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package syscall
+
+import (
+	"github.com/falcosecurity/event-generator/events"
+)
+
+var _ = events.Register(JavaProcessClassFileDownload)
+
+func JavaProcessClassFileDownload(h events.Helper) error {
+	return h.SpawnAs("java", "helper.CombinedServerClient")
+}