diff options
Diffstat (limited to 'vendor/github.com/containernetworking/plugins/pkg/ip/ipforward_linux.go')
-rw-r--r-- | vendor/github.com/containernetworking/plugins/pkg/ip/ipforward_linux.go | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/vendor/github.com/containernetworking/plugins/pkg/ip/ipforward_linux.go b/vendor/github.com/containernetworking/plugins/pkg/ip/ipforward_linux.go new file mode 100644 index 000000000..8216a2c38 --- /dev/null +++ b/vendor/github.com/containernetworking/plugins/pkg/ip/ipforward_linux.go @@ -0,0 +1,61 @@ +// Copyright 2015 CNI 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. + +package ip + +import ( + "bytes" + "io/ioutil" + + "github.com/containernetworking/cni/pkg/types/current" +) + +func EnableIP4Forward() error { + return echo1("/proc/sys/net/ipv4/ip_forward") +} + +func EnableIP6Forward() error { + return echo1("/proc/sys/net/ipv6/conf/all/forwarding") +} + +// EnableForward will enable forwarding for all configured +// address families +func EnableForward(ips []*current.IPConfig) error { + v4 := false + v6 := false + + for _, ip := range ips { + if ip.Version == "4" && !v4 { + if err := EnableIP4Forward(); err != nil { + return err + } + v4 = true + } else if ip.Version == "6" && !v6 { + if err := EnableIP6Forward(); err != nil { + return err + } + v6 = true + } + } + return nil +} + +func echo1(f string) error { + if content, err := ioutil.ReadFile(f); err == nil { + if bytes.Equal(bytes.TrimSpace(content), []byte("1")) { + return nil + } + } + return ioutil.WriteFile(f, []byte("1"), 0644) +} |