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// Copyright 2018 The gVisor 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 linux
import "gvisor.dev/gvisor/pkg/binary"
const (
// IFNAMSIZ is the size of the name field for IFReq.
IFNAMSIZ = 16
)
// IFReq is an interface request.
type IFReq struct {
// IFName is an encoded name, normally null-terminated. This should be
// accessed via the Name and SetName functions.
IFName [IFNAMSIZ]byte
// Data is the union of the following structures:
//
// struct sockaddr ifr_addr;
// struct sockaddr ifr_dstaddr;
// struct sockaddr ifr_broadaddr;
// struct sockaddr ifr_netmask;
// struct sockaddr ifr_hwaddr;
// short ifr_flags;
// int ifr_ifindex;
// int ifr_metric;
// int ifr_mtu;
// struct ifmap ifr_map;
// char ifr_slave[IFNAMSIZ];
// char ifr_newname[IFNAMSIZ];
// char *ifr_data;
Data [24]byte
}
// Name returns the name.
func (ifr *IFReq) Name() string {
for c := 0; c < len(ifr.IFName); c++ {
if ifr.IFName[c] == 0 {
return string(ifr.IFName[:c])
}
}
return string(ifr.IFName[:])
}
// SetName sets the name.
func (ifr *IFReq) SetName(name string) {
n := copy(ifr.IFName[:], []byte(name))
for i := n; i < len(ifr.IFName); i++ {
ifr.IFName[i] = 0
}
}
// SizeOfIFReq is the binary size of an IFReq struct (40 bytes).
var SizeOfIFReq = binary.Size(IFReq{})
// IFMap contains interface hardware parameters.
type IFMap struct {
MemStart uint64
MemEnd uint64
BaseAddr int16
IRQ byte
DMA byte
Port byte
_ [3]byte // Pad to sizeof(struct ifmap).
}
// IFConf is used to return a list of interfaces and their addresses. See
// netdevice(7) and struct ifconf for more detail on its use.
type IFConf struct {
Len int32
_ [4]byte // Pad to sizeof(struct ifconf).
Ptr uint64
}
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