From d05d679fa4de0002100a7cd806897a2d97d19b5f Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Mon, 5 Apr 2021 12:29:15 -0400
Subject: [PATCH] Total across loaded interfaces

---
 dropcount.sh | 45 ++++++++++++++++++++++++++-------------------
 1 file changed, 26 insertions(+), 19 deletions(-)

diff --git a/dropcount.sh b/dropcount.sh
index 4d5a74e..2620b5d 100755
--- a/dropcount.sh
+++ b/dropcount.sh
@@ -16,23 +16,30 @@ if [ "$KEY" != "" ]; then
 fi
 CNT=0
 }
-bpftool map show | grep drop_cnt_map | awk '{ print $1 }' | tr -d ':' | while read IF; do
-	bpftool map dump id "$IF" | {
-		KEY=""
-		CNT=0
-		while read LINE; do
-			case "$LINE" in
-				"key:") ;;
-				"value"*)
-					CNT=$(( $CNT + $(echo "$LINE" | awk '{ print "0x" $11 $10 $9 $8 $7 $6 $5 $4 }') ))
-					;;
-				"Found "*) ;;
-				*)
-					PRINTCNT
-					KEY=$((16#$(echo "$LINE" | awk '{ print $4 $3 $2 $1 }')))
-					;;
-			esac
-		done
+MAP_CONTENTS="$(bpftool map show | grep drop_cnt_map | awk '{ print $1 }' | tr -d ':' | while read IF; do
+	bpftool map dump id "$IF"
+done)"
+echo "$MAP_CONTENTS" | {
+	declare -a COUNTS
+	KEY=""
+	while read LINE; do
+		case "$LINE" in
+			"key:") ;;
+			"value"*)
+				COUNTS["$KEY"]=$(( ${COUNTS["$KEY"]} + $(echo "$LINE" | awk '{ print "0x" $11 $10 $9 $8 $7 $6 $5 $4 }') ))
+				;;
+			"Found "*) ;;
+			*)
+				KEY=$((16#$(echo "$LINE" | awk '{ print $4 $3 $2 $1 }')))
+				if [ "$COUNTS["$KEY"]" = "" ]; then
+					COUNTS["$KEY"]=0
+				fi
+				;;
+		esac
+	done
+	for C in "${!COUNTS[@]}"; do
+		KEY=$C
+		CNT="${COUNTS["$KEY"]}"
 		PRINTCNT
-	}
-done
+	done
+}
-- 
2.30.2