github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/test/packetdrill/packetdrill_setup.sh (about)

     1  #!/bin/bash
     2  
     3  # Copyright 2018 The gVisor Authors.
     4  #
     5  # Licensed under the Apache License, Version 2.0 (the "License");
     6  # you may not use this file except in compliance with the License.
     7  # You may obtain a copy of the License at
     8  #
     9  #     http://www.apache.org/licenses/LICENSE-2.0
    10  #
    11  # Unless required by applicable law or agreed to in writing, software
    12  # distributed under the License is distributed on an "AS IS" BASIS,
    13  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  # See the License for the specific language governing permissions and
    15  # limitations under the License.
    16  
    17  # This script runs both within the sentry context and natively. It should tweak
    18  # TCP parameters to match expectations found in the script files.
    19  sysctl -q net.ipv4.tcp_sack=1
    20  sysctl -q net.ipv4.tcp_rmem="4096 2097152 $((8*1024*1024))"
    21  sysctl -q net.ipv4.tcp_wmem="4096 2097152 $((8*1024*1024))"
    22  
    23  # There may be errors from the above, but they will show up in the test logs and
    24  # we always want to proceed from this point. It's possible that values were
    25  # already set correctly and the nodes were not available in the namespace.
    26  exit 0