1 files changed, 26 insertions, 0 deletions
diff --git a/test/packetdrill/packetdrill_setup.sh b/test/packetdrill/packetdrill_setup.sh
new file mode 100755
index 000000000..b858072f0
--- /dev/null
+++ b/test/packetdrill/packetdrill_setup.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Copyright 2018 The gVisor Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script runs both within the sentry context and natively. It should tweak
+# TCP parameters to match expectations found in the script files.
+sysctl -q net.ipv4.tcp_sack=1
+sysctl -q net.ipv4.tcp_rmem="4096 2097152 $((8*1024*1024))"
+sysctl -q net.ipv4.tcp_wmem="4096 2097152 $((8*1024*1024))"
+
+# There may be errors from the above, but they will show up in the test logs and
+# we always want to proceed from this point. It's possible that values were
+# already set correctly and the nodes were not available in the namespace.
+exit 0