ioctl_linux.go

Documentation: github.com/vishvananda/netlink

     1  package netlink
     2  
     3  import (
     4  	"syscall"
     5  	"unsafe"
     6  
     7  	"golang.org/x/sys/unix"
     8  )
     9  
    10  // ioctl for statistics.
    11  const (
    12  	// ETHTOOL_GSSET_INFO gets string set info
    13  	ETHTOOL_GSSET_INFO = 0x00000037
    14  	// SIOCETHTOOL is Ethtool interface
    15  	SIOCETHTOOL = 0x8946
    16  	// ETHTOOL_GSTRINGS gets specified string set
    17  	ETHTOOL_GSTRINGS = 0x0000001b
    18  	// ETHTOOL_GSTATS gets NIC-specific statistics
    19  	ETHTOOL_GSTATS = 0x0000001d
    20  )
    21  
    22  // string set id.
    23  const (
    24  	// ETH_SS_TEST is self-test result names, for use with %ETHTOOL_TEST
    25  	ETH_SS_TEST = iota
    26  	// ETH_SS_STATS statistic names, for use with %ETHTOOL_GSTATS
    27  	ETH_SS_STATS
    28  	// ETH_SS_PRIV_FLAGS are driver private flag names
    29  	ETH_SS_PRIV_FLAGS
    30  	// _ETH_SS_NTUPLE_FILTERS is deprecated
    31  	_ETH_SS_NTUPLE_FILTERS
    32  	// ETH_SS_FEATURES are device feature names
    33  	ETH_SS_FEATURES
    34  	// ETH_SS_RSS_HASH_FUNCS is RSS hush function names
    35  	ETH_SS_RSS_HASH_FUNCS
    36  )
    37  
    38  // IfreqSlave is a struct for ioctl bond manipulation syscalls.
    39  // It is used to assign slave to bond interface with Name.
    40  type IfreqSlave struct {
    41  	Name  [unix.IFNAMSIZ]byte
    42  	Slave [unix.IFNAMSIZ]byte
    43  }
    44  
    45  // Ifreq is a struct for ioctl ethernet manipulation syscalls.
    46  type Ifreq struct {
    47  	Name [unix.IFNAMSIZ]byte
    48  	Data uintptr
    49  }
    50  
    51  // ethtoolSset is a string set information
    52  type ethtoolSset struct {
    53  	cmd      uint32
    54  	reserved uint32
    55  	mask     uint64
    56  	data     [1]uint32
    57  }
    58  
    59  type ethtoolStats struct {
    60  	cmd    uint32
    61  	nStats uint32
    62  	// Followed by nStats * []uint64.
    63  }
    64  
    65  // newIocltSlaveReq returns filled IfreqSlave with proper interface names
    66  // It is used by ioctl to assign slave to bond master
    67  func newIocltSlaveReq(slave, master string) *IfreqSlave {
    68  	ifreq := &IfreqSlave{}
    69  	copy(ifreq.Name[:unix.IFNAMSIZ-1], master)
    70  	copy(ifreq.Slave[:unix.IFNAMSIZ-1], slave)
    71  	return ifreq
    72  }
    73  
    74  // newIocltStringSetReq creates request to get interface string set
    75  func newIocltStringSetReq(linkName string) (*Ifreq, *ethtoolSset) {
    76  	e := &ethtoolSset{
    77  		cmd:  ETHTOOL_GSSET_INFO,
    78  		mask: 1 << ETH_SS_STATS,
    79  	}
    80  
    81  	ifreq := &Ifreq{Data: uintptr(unsafe.Pointer(e))}
    82  	copy(ifreq.Name[:unix.IFNAMSIZ-1], linkName)
    83  	return ifreq, e
    84  }
    85  
    86  // getSocketUDP returns file descriptor to new UDP socket
    87  // It is used for communication with ioctl interface.
    88  func getSocketUDP() (int, error) {
    89  	return syscall.Socket(unix.AF_INET, unix.SOCK_DGRAM, 0)
    90  }
    91
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