d924f05e12
This includes a breaking change:
acdc658b86
route.Dst is now a zero IPNet instead of nil
Signed-off-by: Etienne Champetier <e.champetier@ateme.com>
66 lines
1.9 KiB
Go
66 lines
1.9 KiB
Go
// Copyright 2015-2017 CNI authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ip
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import (
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"net"
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"github.com/vishvananda/netlink"
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)
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// AddRoute adds a universally-scoped route to a device.
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func AddRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error {
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return netlink.RouteAdd(&netlink.Route{
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LinkIndex: dev.Attrs().Index,
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Scope: netlink.SCOPE_UNIVERSE,
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Dst: ipn,
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Gw: gw,
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})
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}
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// AddHostRoute adds a host-scoped route to a device.
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func AddHostRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error {
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return netlink.RouteAdd(&netlink.Route{
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LinkIndex: dev.Attrs().Index,
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Scope: netlink.SCOPE_HOST,
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Dst: ipn,
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Gw: gw,
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})
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}
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// AddDefaultRoute sets the default route on the given gateway.
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func AddDefaultRoute(gw net.IP, dev netlink.Link) error {
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var defNet *net.IPNet
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if gw.To4() != nil {
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_, defNet, _ = net.ParseCIDR("0.0.0.0/0")
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} else {
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_, defNet, _ = net.ParseCIDR("::/0")
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}
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return AddRoute(defNet, gw, dev)
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}
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// IsIPNetZero check if the IPNet is "0.0.0.0/0" or "::/0"
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// This is needed as go-netlink replaces nil Dst with a '0' IPNet since
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// https://github.com/vishvananda/netlink/commit/acdc658b8613655ddb69f978e9fb4cf413e2b830
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func IsIPNetZero(ipnet *net.IPNet) bool {
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if ipnet == nil {
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return true
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}
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if ones, _ := ipnet.Mask.Size(); ones != 0 {
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return false
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}
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return ipnet.IP.Equal(net.IPv4zero) || ipnet.IP.Equal(net.IPv6zero)
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}
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