socket.go

Documentation: github.com/vishvananda/netlink

     1  package netlink
     2  
     3  import "net"
     4  
     5  // SocketID identifies a single socket.
     6  type SocketID struct {
     7  	SourcePort      uint16
     8  	DestinationPort uint16
     9  	Source          net.IP
    10  	Destination     net.IP
    11  	Interface       uint32
    12  	Cookie          [2]uint32
    13  }
    14  
    15  // Socket represents a netlink socket.
    16  type Socket struct {
    17  	Family  uint8
    18  	State   uint8
    19  	Timer   uint8
    20  	Retrans uint8
    21  	ID      SocketID
    22  	Expires uint32
    23  	RQueue  uint32
    24  	WQueue  uint32
    25  	UID     uint32
    26  	INode   uint32
    27  }
    28  
    29  // UnixSocket represents a netlink unix socket.
    30  type UnixSocket struct {
    31  	Type   uint8
    32  	Family uint8
    33  	State  uint8
    34  	pad    uint8
    35  	INode  uint32
    36  	Cookie [2]uint32
    37  }
    38  
    39  // XDPSocket represents an XDP socket (and the common diagnosis part in
    40  // particular). Please note that in contrast to [UnixSocket] the XDPSocket type
    41  // does not feature “State” information.
    42  type XDPSocket struct {
    43  	// xdp_diag_msg
    44  	// https://elixir.bootlin.com/linux/v6.2/source/include/uapi/linux/xdp_diag.h#L21
    45  	Family uint8
    46  	Type   uint8
    47  	pad    uint16
    48  	Ino    uint32
    49  	Cookie [2]uint32
    50  }
    51  
    52  type XDPInfo struct {
    53  	// XDP_DIAG_INFO/xdp_diag_info
    54  	// https://elixir.bootlin.com/linux/v6.2/source/include/uapi/linux/xdp_diag.h#L51
    55  	Ifindex uint32
    56  	QueueID uint32
    57  
    58  	// XDP_DIAG_UID
    59  	UID uint32
    60  
    61  	// XDP_RX_RING
    62  	// https://elixir.bootlin.com/linux/v6.2/source/include/uapi/linux/xdp_diag.h#L56
    63  	RxRingEntries             uint32
    64  	TxRingEntries             uint32
    65  	UmemFillRingEntries       uint32
    66  	UmemCompletionRingEntries uint32
    67  
    68  	// XDR_DIAG_UMEM
    69  	Umem *XDPDiagUmem
    70  
    71  	// XDR_DIAG_STATS
    72  	Stats *XDPDiagStats
    73  }
    74  
    75  const (
    76  	XDP_DU_F_ZEROCOPY = 1 << iota
    77  )
    78  
    79  // XDPDiagUmem describes the umem attached to an XDP socket.
    80  //
    81  // https://elixir.bootlin.com/linux/v6.2/source/include/uapi/linux/xdp_diag.h#L62
    82  type XDPDiagUmem struct {
    83  	Size      uint64
    84  	ID        uint32
    85  	NumPages  uint32
    86  	ChunkSize uint32
    87  	Headroom  uint32
    88  	Ifindex   uint32
    89  	QueueID   uint32
    90  	Flags     uint32
    91  	Refs      uint32
    92  }
    93  
    94  // XDPDiagStats contains ring statistics for an XDP socket.
    95  //
    96  // https://elixir.bootlin.com/linux/v6.2/source/include/uapi/linux/xdp_diag.h#L74
    97  type XDPDiagStats struct {
    98  	RxDropped     uint64
    99  	RxInvalid     uint64
   100  	RxFull        uint64
   101  	FillRingEmpty uint64
   102  	TxInvalid     uint64
   103  	TxRingEmpty   uint64
   104  }
   105
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