Documentation
¶
Overview ¶
Package netlink contains the bare minimum needed to partially parse netlink messages.
Index ¶
Constants ¶
const ( RTA_ALIGNTO = 4 SizeofNlMsghdr = 0x10 SizeofNlAttr = 0x4 SizeofRtAttr = 0x4 EINVAL = syscall.Errno(0x16) )
TODO - get these from sys/unix or syscall
Variables ¶
var ( ErrNotType20 = errors.New("NetlinkMessage wrong type") ErrParseFailed = errors.New("Unable to parse InetDiagMsg") )
Error types.
Functions ¶
func Parse ¶
func Parse(raw inetdiag.RawInetDiagMsg) (*inetdiag.InetDiagMsg, error)
Parse returns the InetDiagMsg itself Modified from original to also return attribute data array.
Types ¶
type NetlinkMessage ¶
type NetlinkMessage = syscall.NetlinkMessage
type NetlinkRouteAttr ¶
type NetlinkRouteAttr = syscall.NetlinkRouteAttr
func ParseRouteAttr ¶
func ParseRouteAttr(b []byte) ([]NetlinkRouteAttr, error)
ParseRouteAttr parses a byte array into slice of NetlinkRouteAttr struct. Derived from "github.com/vishvananda/netlink/nl/nl_linux.go"
type RouteAttrValue ¶
type RouteAttrValue []byte
RouteAttrValue is the type of RouteAttr.Value
func (RouteAttrValue) CongestionAlgorithm ¶
func (raw RouteAttrValue) CongestionAlgorithm() (string, bool)
CongestionAlgorithm returns the congestion algorithm string INET_DIAG_CONG
type Snapshot ¶
type Snapshot struct {
// Timestamp of batch of messages containing this message.
Timestamp time.Time
// Bit field indicating whether each message type was observed.
Observed uint32
// Bit field indicating whether any message type was NOT fully parsed.
// TODO - populate this field if any message is ignored, or not fully parsed.
NotFullyParsed uint32
// Info from struct inet_diag_msg, including socket_id;
InetDiagMsg *inetdiag.InetDiagMsg
SockInfo *inetdiag.SockID
// From INET_DIAG_CONG message.
CongestionAlgorithm string
// See https://tools.ietf.org/html/rfc3168
// TODO Do we need to record whether these are present and zero, vs absent?
TOS uint8
TClass uint8
ClassID uint8
// TODO Do we need to record present and zero, vs absent?
Shutdown uint8
// From INET_DIAG_PROTOCOL message.
// TODO Do we need to record present and zero, vs absent?
Protocol inetdiag.Protocol
Mark uint32
// TCPInfo contains data from struct tcp_info.
TCPInfo *tcp.LinuxTCPInfo
// Data obtained from INET_DIAG_MEMINFO.
MemInfo *inetdiag.MemInfo
// Data obtained from INET_DIAG_SKMEMINFO.
SocketMem *inetdiag.SocketMemInfo
VegasInfo *inetdiag.VegasInfo
DCTCPInfo *inetdiag.DCTCPInfo
BBRInfo *inetdiag.BBRInfo
}
Snapshot contains all info gathered through netlink library.
func MakeSnapShot ¶
func MakeSnapShot(msg *NetlinkMessage, skipLocal bool) (*Snapshot, error)
MakeArchivalRecord parses the NetlinkMessage into a ArchivalRecord. If skipLocal is true, it will return nil for loopback, local unicast, multicast, and unspecified connections. Note that Parse does not populate the Timestamp field, so caller should do so.
Source Files