From fd5a4615a8c2684076a66389fc747be49f3e0b6c Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Sat, 3 Apr 2021 22:14:43 -0400
Subject: [PATCH] Add default installer script

---
 dropcount.sh | 19 +++++++++++++++++++
 install.sh   | 16 ++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100755 dropcount.sh
 create mode 100755 install.sh

diff --git a/dropcount.sh b/dropcount.sh
new file mode 100755
index 0000000..f67abf7
--- /dev/null
+++ b/dropcount.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+KEY=""
+CNT=0
+bpftool map dump id "$(bpftool map show | grep drop_cnt_map | awk '{ print $1 }' | tr -d ':')" | while read LINE; do
+	case "$LINE" in
+		"key:") ;;
+		"value"*)
+			CNT=$(( $CNT + $(echo "$LINE" | awk '{ print "0x" $11 $10 $9 $8 $7 $6 $5 $4 }') ))
+			;;
+		"Found "*) ;;
+		*)
+			if [ "$KEY" != "" ]; then
+				echo "$KEY: $CNT"
+			fi
+			KEY=$(echo "$LINE" | awk '{ print "0x" $4 $3 $2 $1 }')
+			CNT=0
+			;;
+	esac
+done
diff --git a/install.sh b/install.sh
new file mode 100755
index 0000000..d93664c
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+set -e
+
+RULES="$(birdc show route table flowspec4)
+$(birdc show route table flowspec6)"
+
+echo "$RULES" | ./genrules.py --8021q=drop-vlan --v6frag=ignore-parse-if-rule --ihl=drop-options
+clang -std=c99 -pedantic -Wall -Wextra -Wno-pointer-arith -Wno-unused-variable -Os -emit-llvm -c xdp.c -o - | llc -march=bpf -filetype=obj -o xdp
+
+echo "Before unload drop count was:"
+./dropcount.sh || echo "Not loaded"
+
+ip link set "$1" xdp off
+ip link set "$1" xdpgeneric off
+# Note that sometimes the automated fallback does not work properly so we have to || generic here
+ip link set "$1" xdp obj xdp sec xdp_drop || ip link set "$1" xdpgeneric obj xdp sec xdp_drop
-- 
2.39.5