Avoid empty metada files

[anna.git] / example / diameter / pcapDecoder / tsharkDecoder.sh

diff --git a/example/diameter/pcapDecoder/tsharkDecoder.sh b/example/diameter/pcapDecoder/tsharkDecoder.sh
index 93b29d4..3628318 100755 (executable)
--- a/example/diameter/pcapDecoder/tsharkDecoder.sh
+++ b/example/diameter/pcapDecoder/tsharkDecoder.sh
@@ -38,7 +38,8 @@
 
 # Decoder version using tshark tool
 #
-# RESTRICTIONS: only TCP datagrams. Allow split diameter messages between frames, but not, several messages into single datagram.
+# RESTRICTIONS: TCP & SCTP datagrams. Allow split diameter messages between frames, but not, several messages into single datagram.
+#               If sniffing fails, try to create the <frame>.hex and <frame>.metadata files manually (try 'tshark -nr input.pcap -Vx' and so on ...)
 
 #############
 # VARIABLES #
@@ -307,7 +308,7 @@ do
   group_array=( $(echo $group | sed 's/,/ /g') )
   echo "Grouping frames ${group_array[*]} ..."
   for frame in ${group_array[@]}; do
-    cat $RESULTS_DIR/$frame.hex >> $tmpdir/diam.$group
+    cat $RESULTS_DIR/$frame.hex >> $tmpdir/diam.$group 2>/dev/null
   done
   cat $tmpdir/diam.$group | tr -d '\n' > $RESULTS_DIR/$frame.hex
   # Delete all frames except last one in the group:
@@ -318,7 +319,7 @@ done
 #segments=( $(cat $tmpdir/diameter_frames | awk -F\| '{ if ($16 == "") print $1 }') )
 segments=( $(echo $to_delete) )
 echo "Deleting superfluous buffers & metadata (${segments[*]}) ..."
-for s in ${segments[@]}; do rm $RESULTS_DIR/${s}.* ; done
+for s in ${segments[@]}; do rm -f $RESULTS_DIR/${s}.* ; done
 
 # Detecting Session-Id values:
 grep ^sessionid= $RESULTS_DIR/*.metadata 2>/dev/null | cut -d= -f2- | sort -u > $RESULTS_DIR/session-ids
@@ -353,5 +354,13 @@ then
   rm $RESULTS_DIR/.wanted $RESULTS_DIR/.all
 fi
 
+# Purge frames with invalid metadata:
+invalid=( $(grep -lw "^code=$" $RESULTS_DIR/*metadata) )
+for file in ${invalid[@]}
+do
+  frm=$(basename $file | cut -d\. -f1)
+  rm $RESULTS_DIR/${frm}.*
+done
+
 _exit "Done!" 0