package/ebtables/0001-replace-ebtables-save-perl-script-with-bash.patch

From 73536d15c80be96049289d96fc32122467c56b1d Mon Sep 17 00:00:00 2001
From: Matt Weber <matthew.weber@rockwellcollins.com>
Date: Mon, 16 Dec 2019 13:27:30 -0600
Subject: [PATCH] ebtables: replace ebtables-save perl script with bash rewrite

Fedora provides a bash replacement for the default ebtables-save perl
script. Using it allows the ebtables run-time dependency on perl to
be replaced with a runtime dependency on bash - which is lower
overhead and more likely to be present on typical embedded systems
already.

  https://bugzilla.redhat.com/show_bug.cgi?id=746040
  http://pkgs.fedoraproject.org/cgit/rpms/ebtables.git/tree/ebtables-save

Upstream:
https://github.com/openembedded/meta-openembedded/commit/7f723007364ba79de05447671e83d4eefb3097dc

Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
[ryanbarnett3@gmail.com:
 - changed EBTABLES executable to /usr/sbin/ebtables-legacy
]
Signed-off-by: Ryan Barnett <ryanbarnett3@gmail.com>
---
 ebtables-save.sh | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 ebtables-save.sh

diff --git a/ebtables-save.sh b/ebtables-save.sh
new file mode 100644
index 0000000..2d7fc4e
--- /dev/null
+++ b/ebtables-save.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+EBTABLES="/usr/sbin/ebtables-legacy"
+
+[ -x "$EBTABLES" ] || exit 1
+
+echo "# Generated by ebtables-save v1.0 on $(date)"
+
+cnt=""
+[ "x$EBTABLES_SAVE_COUNTER" = "xyes" ] && cnt="--Lc"
+
+for table_name in $(grep -E '^ebtable_' /proc/modules | cut -f1 -d' ' | sed s/ebtable_//); do
+    table=$($EBTABLES -t $table_name -L $cnt)
+    [ $? -eq 0 ] || { echo "$table"; exit -1; }
+
+    chain=""
+    rules=""
+    while read line; do
+	[ -z "$line" ] && continue
+
+	case "$line" in 
+	    Bridge\ table:\ *)
+		echo "*${line:14}"
+		;;
+	    Bridge\ chain:\ *)
+		chain="${line:14}"
+		chain="${chain%%,*}"
+		policy="${line##*policy: }"
+		echo ":$chain $policy"
+		;;
+	    *)
+		if [ "$cnt" = "--Lc" ]; then
+		    line=${line/, pcnt \=/ -c}
+		    line=${line/-- bcnt \=/}
+		fi
+		rules="$rules-A $chain $line\n"
+		;;
+	esac
+    done <<EOF
+$table
+EOF
+    echo -e $rules
+done
-- 
2.17.1