conntrack

package
v0.0.0-...-d8b4333 Latest Latest
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 Go to latest Published: Mar 4, 2018 License: Apache-2.0 Imports: 8 Imported by: 0

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Constants

View Source 
const (
	// #defined in libnfnetlink/include/libnfnetlink/linux_nfnetlink.h
	NFNL_SUBSYS_CTNETLINK = 1
	NFNETLINK_V0          = 0

	// #defined in libnfnetlink/include/libnfnetlink/linux_nfnetlink_compat.h
	NF_NETLINK_CONNTRACK_NEW     = 0x00000001
	NF_NETLINK_CONNTRACK_UPDATE  = 0x00000002
	NF_NETLINK_CONNTRACK_DESTROY = 0x00000004

	// #defined in libnfnetlink/include/libnfnetlink/libnfnetlink.h
	NLA_F_NESTED        = uint16(1 << 15)
	NLA_F_NET_BYTEORDER = uint16(1 << 14)
	NLA_TYPE_MASK       = ^(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
)

Variables

This section is empty.

Functions

func DefaultFilter 

func DefaultFilter(c ConntrackInfo) bool

Types

type Attr 

type Attr struct {
	Msg            []byte
	Typ            int
	IsNested       bool
	IsNetByteorder bool
}

type CntlMsgTypes 

type CntlMsgTypes int
const (
	IpctnlMsgCtNew            CntlMsgTypes = 0
	IpctnlMsgCtGet            CntlMsgTypes = 1
	IpctnlMsgCtDelete         CntlMsgTypes = 2
	IpctnlMsgCtGetCtrzero     CntlMsgTypes = 3
	IpctnlMsgCtGetStatsCpu    CntlMsgTypes = 4
	IpctnlMsgCtGetStats       CntlMsgTypes = 5
	IpctnlMsgCtGetDying       CntlMsgTypes = 6
	IpctnlMsgCtGetUnconfirmed CntlMsgTypes = 7
	IpctnlMsgMax              CntlMsgTypes = 8
)

type ConnTrack 

type ConnTrack struct {
	// contains filtered or unexported fields
}

ConnTrack monitors the network connections.

func New 

func New(filterFunc FilterFunc) (*ConnTrack, error)

New returns a ConnTrack.

func (ConnTrack) Close 

func (c ConnTrack) Close()

Close stops all monitoring and executables.

func (*ConnTrack) ConnectionEvents 

func (c *ConnTrack) ConnectionEvents() []ConntrackInfo

Connections gets the list of all connection track events seen since last time you called it and return them as a list of ConntrackInfo.

func (*ConnTrack) Follow 

func (c *ConnTrack) Follow() (<-chan ConntrackInfo, func(), error)

Follow returns a channel with all changes. NOTE: currently we only return connection is ESTABLISHED state.

func (*ConnTrack) ListConntrackInfos 

func (c *ConnTrack) ListConntrackInfos() ([]ConntrackInfo, error)

type ConntrackInfo 

type ConntrackInfo struct {
	MsgType        NfConntrackEventType
	Proto          int
	Src            net.IP
	SrcPort        uint16
	Dst            net.IP
	DstPort        uint16
	Packets        uint64
	Bytes          uint64
	StartTimestamp uint64
	DeltaTime      uint64
	TCPState       TCPState
}

Struct for storing retreived conntrack information. The fields are chosen according the output of nf_conntrack.

func (ConntrackInfo) String 

func (c ConntrackInfo) String() string

type ConntrackListReq 

type ConntrackListReq struct {
	Header syscall.NlMsghdr
	Body   nfgenmsg
}

type CtattrCounters 

type CtattrCounters int
const (
	CtaCountersUnspec    CtattrCounters = 0
	CtaCountersPackets   CtattrCounters = 1
	CtaCountersBytes     CtattrCounters = 2
	CtaCounters32Packets CtattrCounters = 3
	CtaCoutners32Bytes   CtattrCounters = 4
	CtaCountersMax       CtattrCounters = 5
)

type CtattrIp 

type CtattrIp int
const (
	CtaIpUnspec CtattrIp = 0
	CtaIpV4Src  CtattrIp = 1
	CtaIpV4Dst  CtattrIp = 2
	CtaIpV6Src  CtattrIp = 3
	CtaIpV6Dst  CtattrIp = 4
	CtaIpMax    CtattrIp = 5
)

type CtattrL4proto 

type CtattrL4proto int
const (
	CtaProtoUnspec     CtattrL4proto = 0
	CtaProtoNum        CtattrL4proto = 1
	CtaProtoSrcPort    CtattrL4proto = 2
	CtaProtoDstPort    CtattrL4proto = 3
	CtaProtoIcmpId     CtattrL4proto = 4
	CtaProtoIcmpType   CtattrL4proto = 5
	CtaProtoIcmpCode   CtattrL4proto = 6
	CtaProtoIcmpv6Id   CtattrL4proto = 7
	CtaProtoIcmpv6Type CtattrL4proto = 8
	CtaProtoIcmpv6Code CtattrL4proto = 9
	CtaProtoMax        CtattrL4proto = 10
)

type CtattrProtoinfo 

type CtattrProtoinfo int
const (
	CtaProtoinfoUnspec CtattrProtoinfo = 0
	CtaProtoinfoTcp    CtattrProtoinfo = 1
	CtaProtoinfoDccp   CtattrProtoinfo = 2
	CtaProtoinfoSctp   CtattrProtoinfo = 3
	CtaProtoinfoMax    CtattrProtoinfo = 4
)

type CtattrProtoinfoTcp 

type CtattrProtoinfoTcp int
const (
	CtaProtoinfoTcpUnspec         CtattrProtoinfoTcp = 0
	CtaProtoinfoTcpState          CtattrProtoinfoTcp = 1
	CtaProtoinfoTcpWscaleOriginal CtattrProtoinfoTcp = 2
	CtaProtoinfoTcpWscaleReply    CtattrProtoinfoTcp = 3
	CtaProtoinfoTcpFlagsOriginal  CtattrProtoinfoTcp = 4
	CtaProtoinfoTcpFlagsReply     CtattrProtoinfoTcp = 5
	CtaProtoinfoTcpMax            CtattrProtoinfoTcp = 6
)

type CtattrTimestamp 

type CtattrTimestamp int
const (
	CtaTimestampUnspec CtattrTimestamp = 0
	CtaTimestampStart  CtattrTimestamp = 1
	CtaTimestampStop   CtattrTimestamp = 2
	CtaTimestampMax    CtattrTimestamp = 3
)

type CtattrTuple 

type CtattrTuple int
const (
	CtaTupleUnspec CtattrTuple = 0
	CtaTupleIp     CtattrTuple = 1
	CtaTupleProto  CtattrTuple = 2
	CtaTupleMax    CtattrTuple = 3
)

type CtattrType 

type CtattrType int
const (
	CtaUnspec         CtattrType = 0
	CtaTupleOrig      CtattrType = 1
	CtaTupleReply     CtattrType = 2
	CtaStatus         CtattrType = 3
	CtaProtoinfo      CtattrType = 4
	CtaHelp           CtattrType = 5
	CtaNatSrc         CtattrType = 6
	CtaTimeout        CtattrType = 7
	CtaMark           CtattrType = 8
	CtaCountersOrig   CtattrType = 9
	CtaCountersReply  CtattrType = 10
	CtaUse            CtattrType = 11
	CtaId             CtattrType = 12
	CtaNatDst         CtattrType = 13
	CtaTupleMaster    CtattrType = 14
	CtaNatSeqAdjOrig  CtattrType = 15
	CtaNatSeqAdjReply CtattrType = 16
	CtaSecmark        CtattrType = 17
	CtaZone           CtattrType = 18
	CtaSecctx         CtattrType = 19
	CtaTimestamp      CtattrType = 20
	CtaMarkMask       CtattrType = 21
	CtaLabels         CtattrType = 22
	CtaLabelsMask     CtattrType = 23
	CtaMax            CtattrType = 24
)

type FilterFunc 

type FilterFunc func(c ConntrackInfo) bool

FilterFunc is used against each ConntrackInfo. If pass return true; otherwise return false.

type NfConntrackAttrGrp 

type NfConntrackAttrGrp int
const (
	AttrGrpOrigIpv4     NfConntrackAttrGrp = 0
	AttrGrpReplIpv4     NfConntrackAttrGrp = 1
	AttrGrpOrigIpv6     NfConntrackAttrGrp = 2
	AttrGrpReplIpv6     NfConntrackAttrGrp = 3
	AttrGrpOrigPort     NfConntrackAttrGrp = 4
	AttrGrpReplPort     NfConntrackAttrGrp = 5
	AttrGrpIcmp         NfConntrackAttrGrp = 6
	AttrGrpMasterIpv4   NfConntrackAttrGrp = 7
	AttrGrpMasterIpv6   NfConntrackAttrGrp = 8
	AttrGrpMasterPort   NfConntrackAttrGrp = 9
	AttrGrpOrigCounters NfConntrackAttrGrp = 10
	AttrGrpReplCounters NfConntrackAttrGrp = 11
	AttrGrpOrigAddrSrc  NfConntrackAttrGrp = 12
	AttrGrpOrigAddrDst  NfConntrackAttrGrp = 13
	AttrGrpReplAddrSrc  NfConntrackAttrGrp = 14
	AttrGrpReplAddrDst  NfConntrackAttrGrp = 15
	AttrGrpMax          NfConntrackAttrGrp = 16
)

type NfConntrackEventType 

type NfConntrackEventType int

Event types. 

const (
	NfctMsgUnknown NfConntrackEventType = 0
	NfctMsgNew     NfConntrackEventType = 1 << 0
	NfctMsgUpdate  NfConntrackEventType = 1 << 1
	NfctMsgDestroy NfConntrackEventType = 1 << 2
)

type NfConntrackQuery 

type NfConntrackQuery int
const (
	NfctQCreate          NfConntrackQuery = 0
	NfctQUpdate          NfConntrackQuery = 1
	NfctQDestroy         NfConntrackQuery = 2
	NfctQGet             NfConntrackQuery = 3
	NfctQFlush           NfConntrackQuery = 4
	NfctQDump            NfConntrackQuery = 5
	NfctQDumpReset       NfConntrackQuery = 6
	NfctQCreateUpdate    NfConntrackQuery = 7
	NfctQDumpFilter      NfConntrackQuery = 8
	NfctQDumpFilterReset NfConntrackQuery = 9
)

type TCPState 

type TCPState uint8
const (
	TCPState_NONE        TCPState = 0
	TCPState_SYN_SENT    TCPState = 1
	TCPState_SYN_RECV    TCPState = 2
	TCPState_ESTABLISHED TCPState = 3
	TCPState_FIN_WAIT    TCPState = 4
	TCPState_CLOSE_WAIT  TCPState = 5
	TCPState_LAST_ACK    TCPState = 6
	TCPState_TIME_WAIT   TCPState = 7
	TCPState_CLOSE       TCPState = 8
	TCPState_LISTEN      TCPState = 9
	TCPState_MAX         TCPState = 10
	TCPState_IGNORE      TCPState = 11
)

taken from libnetfilter_conntrack/src/conntrack/snprintf.c

Source Files

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