github.com/sagernet/netlink@v0.0.0-20240612041022-b9a21c07ac6a/nl/bridge_linux.go (about)

     1  package nl
     2  
     3  import (
     4  	"fmt"
     5  	"unsafe"
     6  )
     7  
     8  const (
     9  	SizeofBridgeVlanInfo = 0x04
    10  )
    11  
    12  /* Bridge Flags */
    13  const (
    14  	BRIDGE_FLAGS_MASTER = iota + 1 /* Bridge command to/from master */
    15  	BRIDGE_FLAGS_SELF              /* Bridge command to/from lowerdev */
    16  )
    17  
    18  /* Bridge management nested attributes
    19   * [IFLA_AF_SPEC] = {
    20   *     [IFLA_BRIDGE_FLAGS]
    21   *     [IFLA_BRIDGE_MODE]
    22   *     [IFLA_BRIDGE_VLAN_INFO]
    23   * }
    24   */
    25  const (
    26  	IFLA_BRIDGE_FLAGS = iota
    27  	IFLA_BRIDGE_MODE
    28  	IFLA_BRIDGE_VLAN_INFO
    29  )
    30  
    31  const (
    32  	BRIDGE_VLAN_INFO_MASTER = 1 << iota
    33  	BRIDGE_VLAN_INFO_PVID
    34  	BRIDGE_VLAN_INFO_UNTAGGED
    35  	BRIDGE_VLAN_INFO_RANGE_BEGIN
    36  	BRIDGE_VLAN_INFO_RANGE_END
    37  )
    38  
    39  // struct bridge_vlan_info {
    40  //   __u16 flags;
    41  //   __u16 vid;
    42  // };
    43  
    44  type BridgeVlanInfo struct {
    45  	Flags uint16
    46  	Vid   uint16
    47  }
    48  
    49  func (b *BridgeVlanInfo) Serialize() []byte {
    50  	return (*(*[SizeofBridgeVlanInfo]byte)(unsafe.Pointer(b)))[:]
    51  }
    52  
    53  func DeserializeBridgeVlanInfo(b []byte) *BridgeVlanInfo {
    54  	return (*BridgeVlanInfo)(unsafe.Pointer(&b[0:SizeofBridgeVlanInfo][0]))
    55  }
    56  
    57  func (b *BridgeVlanInfo) PortVID() bool {
    58  	return b.Flags&BRIDGE_VLAN_INFO_PVID > 0
    59  }
    60  
    61  func (b *BridgeVlanInfo) EngressUntag() bool {
    62  	return b.Flags&BRIDGE_VLAN_INFO_UNTAGGED > 0
    63  }
    64  
    65  func (b *BridgeVlanInfo) String() string {
    66  	return fmt.Sprintf("%+v", *b)
    67  }
    68  
    69  /* New extended info filters for IFLA_EXT_MASK */
    70  const (
    71  	RTEXT_FILTER_VF = 1 << iota
    72  	RTEXT_FILTER_BRVLAN
    73  	RTEXT_FILTER_BRVLAN_COMPRESSED
    74  )