1From 73536d15c80be96049289d96fc32122467c56b1d Mon Sep 17 00:00:00 2001
2From: Matt Weber <matthew.weber@rockwellcollins.com>
3Date: Mon, 16 Dec 2019 13:27:30 -0600
4Subject: [PATCH] ebtables: replace ebtables-save perl script with bash rewrite
5
6Fedora provides a bash replacement for the default ebtables-save perl
7script. Using it allows the ebtables run-time dependency on perl to
8be replaced with a runtime dependency on bash - which is lower
9overhead and more likely to be present on typical embedded systems
10already.
11
12  https://bugzilla.redhat.com/show_bug.cgi?id=746040
13  http://pkgs.fedoraproject.org/cgit/rpms/ebtables.git/tree/ebtables-save
14
15Upstream:
16https://github.com/openembedded/meta-openembedded/commit/7f723007364ba79de05447671e83d4eefb3097dc
17
18Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
19[ryanbarnett3@gmail.com:
20 - changed EBTABLES executable to /usr/sbin/ebtables-legacy
21]
22Signed-off-by: Ryan Barnett <ryanbarnett3@gmail.com>
23---
24 ebtables-save.sh | 43 +++++++++++++++++++++++++++++++++++++++++++
25 1 file changed, 43 insertions(+)
26 create mode 100644 ebtables-save.sh
27
28diff --git a/ebtables-save.sh b/ebtables-save.sh
29new file mode 100644
30index 0000000..2d7fc4e
31--- /dev/null
32+++ b/ebtables-save.sh
33@@ -0,0 +1,43 @@
34+#!/bin/bash
35+
36+EBTABLES="/usr/sbin/ebtables-legacy"
37+
38+[ -x "$EBTABLES" ] || exit 1
39+
40+echo "# Generated by ebtables-save v1.0 on $(date)"
41+
42+cnt=""
43+[ "x$EBTABLES_SAVE_COUNTER" = "xyes" ] && cnt="--Lc"
44+
45+for table_name in $(grep -E '^ebtable_' /proc/modules | cut -f1 -d' ' | sed s/ebtable_//); do
46+    table=$($EBTABLES -t $table_name -L $cnt)
47+    [ $? -eq 0 ] || { echo "$table"; exit -1; }
48+
49+    chain=""
50+    rules=""
51+    while read line; do
52+	[ -z "$line" ] && continue
53+
54+	case "$line" in
55+	    Bridge\ table:\ *)
56+		echo "*${line:14}"
57+		;;
58+	    Bridge\ chain:\ *)
59+		chain="${line:14}"
60+		chain="${chain%%,*}"
61+		policy="${line##*policy: }"
62+		echo ":$chain $policy"
63+		;;
64+	    *)
65+		if [ "$cnt" = "--Lc" ]; then
66+		    line=${line/, pcnt \=/ -c}
67+		    line=${line/-- bcnt \=/}
68+		fi
69+		rules="$rules-A $chain $line\n"
70+		;;
71+	esac
72+    done <<EOF
73+$table
74+EOF
75+    echo -e $rules
76+done
77--
782.17.1
79
80