github.com/metacubex/gvisor@v0.0.0-20240320004321-933faba989ec/pkg/abi/linux/netdevice.go (about)

     1  // Copyright 2018 The gVisor Authors.
     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 linux
    16  
    17  const (
    18  	// IFNAMSIZ is the size of the name field for IFReq.
    19  	IFNAMSIZ = 16
    20  )
    21  
    22  // IFReq is an interface request.
    23  //
    24  // +marshal
    25  type IFReq struct {
    26  	// IFName is an encoded name, normally null-terminated. This should be
    27  	// accessed via the Name and SetName functions.
    28  	IFName [IFNAMSIZ]byte
    29  
    30  	// Data is the union of the following structures:
    31  	//
    32  	//	struct sockaddr ifr_addr;
    33  	//	struct sockaddr ifr_dstaddr;
    34  	//	struct sockaddr ifr_broadaddr;
    35  	//	struct sockaddr ifr_netmask;
    36  	//	struct sockaddr ifr_hwaddr;
    37  	//	short           ifr_flags;
    38  	//	int             ifr_ifindex;
    39  	//	int             ifr_metric;
    40  	//	int             ifr_mtu;
    41  	//	struct ifmap    ifr_map;
    42  	//	char            ifr_slave[IFNAMSIZ];
    43  	//	char            ifr_newname[IFNAMSIZ];
    44  	//	char           *ifr_data;
    45  	Data [24]byte
    46  }
    47  
    48  // Name returns the name.
    49  func (ifr *IFReq) Name() string {
    50  	for c := 0; c < len(ifr.IFName); c++ {
    51  		if ifr.IFName[c] == 0 {
    52  			return string(ifr.IFName[:c])
    53  		}
    54  	}
    55  	return string(ifr.IFName[:])
    56  }
    57  
    58  // SetName sets the name.
    59  func (ifr *IFReq) SetName(name string) {
    60  	n := copy(ifr.IFName[:], []byte(name))
    61  	for i := n; i < len(ifr.IFName); i++ {
    62  		ifr.IFName[i] = 0
    63  	}
    64  }
    65  
    66  // SizeOfIFReq is the binary size of an IFReq struct (40 bytes).
    67  var SizeOfIFReq = (*IFReq)(nil).SizeBytes()
    68  
    69  // IFMap contains interface hardware parameters.
    70  type IFMap struct {
    71  	MemStart uint64
    72  	MemEnd   uint64
    73  	BaseAddr int16
    74  	IRQ      byte
    75  	DMA      byte
    76  	Port     byte
    77  	_        [3]byte // Pad to sizeof(struct ifmap).
    78  }
    79  
    80  // IFConf is used to return a list of interfaces and their addresses. See
    81  // netdevice(7) and struct ifconf for more detail on its use.
    82  //
    83  // +marshal
    84  type IFConf struct {
    85  	Len int32
    86  	_   [4]byte // Pad to sizeof(struct ifconf).
    87  	Ptr uint64
    88  }
    89  
    90  // EthtoolCmd is a marshallable type to be able to easily copyin the
    91  // the command for an SIOCETHTOOL ioctl.
    92  //
    93  // +marshal
    94  type EthtoolCmd uint32
    95  
    96  const (
    97  	// ETHTOOL_GFEATURES is the command to SIOCETHTOOL to query device
    98  	// features.
    99  	// See: <linux/ethtool.h>
   100  	ETHTOOL_GFEATURES EthtoolCmd = 0x3a
   101  )
   102  
   103  // EthtoolGFeatures is used to return a list of device features.
   104  // See: <linux/ethtool.h>
   105  //
   106  // +marshal
   107  type EthtoolGFeatures struct {
   108  	Cmd  uint32
   109  	Size uint32
   110  }
   111  
   112  // EthtoolGetFeaturesBlock is used to return state of upto 32 device
   113  // features.
   114  // See: <linux/ethtool.h>
   115  //
   116  // +marshal
   117  type EthtoolGetFeaturesBlock struct {
   118  	Available    uint32
   119  	Requested    uint32
   120  	Active       uint32
   121  	NeverChanged uint32
   122  }