Add capability to capture without PCAP filter

tools/pcapdump/src/org/etsi/its/pcapdump/PcapMultiplexer.java

@@ -101,18 +101,20 @@ public class PcapMultiplexer implements Runnable {
         }  
         captureThread = new Thread(this);
         captureThread.start();   
-        filter = String.format("ether proto 0x%04x", frameType);
-        System.out.println("New filter: " + filter);
+        if (frameType != 0) {
+            filter = String.format("ether proto 0x%04x", frameType);
+            System.out.println("New filter: " + filter);
         
-        // Apply filter
-        PcapBpfProgram bpfFilter = new PcapBpfProgram();
-        int optimize = 0; // 1 means true, 0 means false
-        int netmask = 0;            
-        int r = pcap.compile(bpfFilter, filter, optimize, netmask);
-        if (r != Pcap.OK) {
-            System.out.println("Filter error: " + pcap.getErr());
-        }
-        pcap.setFilter(bpfFilter);
+            // Apply filter
+            PcapBpfProgram bpfFilter = new PcapBpfProgram();
+            int optimize = 0; // 1 means true, 0 means false
+            int netmask = 0;            
+            int r = pcap.compile(bpfFilter, filter, optimize, netmask);
+            if (r != Pcap.OK) {
+                System.out.println("Filter error: " + pcap.getErr());
+            }
+            pcap.setFilter(bpfFilter);
+        } // else, no filter
         
         dumper = pcap.dumpOpen(client.getFileName());