github.com/datadog/cilium@v1.6.12/daemon/sysctl_linux.go (about)

     1  // Copyright 2019 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"github.com/cilium/cilium/pkg/option"
    19  	"github.com/cilium/cilium/pkg/sysctl"
    20  )
    21  
    22  func enableIPForwarding() error {
    23  	if err := sysctl.Enable("net.ipv4.ip_forward"); err != nil {
    24  		return err
    25  	}
    26  	if err := sysctl.Enable("net.ipv4.conf.all.forwarding"); err != nil {
    27  		return err
    28  	}
    29  	if option.Config.EnableIPv6 {
    30  		if err := sysctl.Enable("net.ipv6.conf.all.forwarding"); err != nil {
    31  			return err
    32  		}
    33  	}
    34  	return nil
    35  }