Improve drop count printing

diff --git a/dropcount.sh b/dropcount.sh
index f67abf7251fb0c52c050272e26005923f949f4f7..3cfc4ab922c4bba79a3074104aa34a7560ffaf38 100755 (executable)
--- a/dropcount.sh
+++ b/dropcount.sh
@@ -10,7 +10,17 @@ bpftool map dump id "$(bpftool map show | grep drop_cnt_map | awk '{ print $1 }'
                "Found "*) ;;
                *)
                        if [ "$KEY" != "" ]; then
-                               echo "$KEY: $CNT"
+                               if [ "$KEY" = "0x00000000" ]; then
+                                       echo "Invalid packet length: $CNT"
+                               elif [ "$KEY" = "0x00000001" ]; then
+                                       echo "Invalid VLAN tag: $CNT"
+                               elif [ "$KEY" = "0x00000002" ]; then
+                                       echo "Invalid/rejected IHL IPv4 field: $CNT"
+                               elif [ "$KEY" = "0x00000003" ]; then
+                                       echo "Rejected IPv6 fragments: $CNT"
+                               else
+                                       echo "$KEY: $CNT"
+                               fi
                        fi
                        KEY=$(echo "$LINE" | awk '{ print "0x" $4 $3 $2 $1 }')
                        CNT=0