/
net.go
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/
net.go
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package run
// SPDX-License-Identifier: BSD-3-Clause
//
// Authors: Alexander Jung <a.jung@lancs.ac.uk>
//
// Copyright (c) 2020, Lancaster University. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
import (
"net"
"github.com/lancs-net/netns/bridge"
"github.com/lancs-net/netns/network"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/lancs-net/wayfinder/log"
)
type Bridge struct {
Name string
Interface string
Subnet string
CacheDir string
netOpt network.Opt
brOpt bridge.Opt
client *network.Client
}
// Init prepares netns
func (b *Bridge) Init(dryRun bool) error {
return nil
}
// Create a veth pair with the bridge for the container
func (b *Bridge) Create(s *specs.State) (net.IP, error) {
// Create the bridge using netns
b.netOpt.ContainerInterface = b.Interface
b.netOpt.BridgeName = b.Name
b.brOpt.Name = b.Name
b.brOpt.IPAddr = b.Subnet
b.netOpt.StateDir = b.CacheDir
log.Debugf("Creating bridge %s...", b.Name)
client, err := network.New(b.netOpt)
if err != nil {
return nil, err
}
return client.Create(s, b.brOpt, "")
}