utils

package
v0.0.9 Latest Latest
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 Go to latest Published: Apr 25, 2024 License: MIT Imports: 23 Imported by: 0

Documentation

Overview

Copyright (c) Microsoft Corporation. Licensed under the MIT license.

Copyright (c) Microsoft Corporation. Licensed under the MIT license.

Copyright (c) Microsoft Corporation. Licensed under the MIT license.

Copyright (c) Microsoft Corporation. Licensed under the MIT license.

Copyright (c) Microsoft Corporation. Licensed under the MIT license.

Index

Constants

View Source 
const (
	Verdict_RETRANSMISSION flow.Verdict = 15
	Verdict_DNS            flow.Verdict = 16
	TypeUrl                string       = "retina.sh"
)

Additional Verdicts to be used for flow objects

View Source 
const (
	// Common Counters across os distributions (should these be asynch or synch)
	// make sure IsMetric is updated if you add a new metric here
	DropCountTotalName                   = "drop_count"
	DropBytesTotalName                   = "drop_bytes"
	ForwardCountTotalName                = "forward_count"
	ForwardBytesTotalName                = "forward_bytes"
	TcpStateGaugeName                    = "tcp_state"
	TcpConnectionRemoteGaugeName         = "tcp_connection_remote"
	TcpConnectionStatsName               = "tcp_connection_stats"
	TcpFlagCounters                      = "tcp_flag_counters"
	TcpRetransCount                      = "tcp_retransmission_count"
	IpConnectionStatsName                = "ip_connection_stats"
	UdpConnectionStatsName               = "udp_connection_stats"
	UdpActiveSocketsCounterName          = "udp_active_sockets"
	InterfaceStatsName                   = "interface_stats"
	DNSRequestCounterName                = "dns_request_count"
	DNSResponseCounterName               = "dns_response_count"
	NodeApiServerLatencyName             = "node_apiserver_latency"
	NodeApiServerTcpHandshakeLatencyName = "node_apiserver_handshake_latency"
	NoResponseFromApiServerName          = "node_apiserver_no_response"

	// Common Gauges across os distributions
	NodeConnectivityStatusName         = "node_connectivity_status"
	NodeConnectivityLatencySecondsName = "node_connectivity_latency_seconds"
)

Variables

View Source 
var (

	// todo move to attributes pkg?
	Type           = "type"
	Reason         = "reason"
	Direction      = "direction"
	SourceNodeName = "source_node_name"
	TargetNodeName = "target_node_name"
	State          = "state"
	Address        = "address"
	Port           = "port"
	StatName       = "statistic_name"
	InterfaceName  = "interface_name"
	Flag           = "flag"
	Endpoint       = "endpoint"
	AclRule        = "aclrule"
	Active         = "ACTIVE"

	// TCP Connection Statistic Names
	ResetCount           = "ResetCount"
	ClosedFin            = "ClosedFin"
	ResetSyn             = "ResetSyn"
	TcpHalfOpenTimeouts  = "TcpHalfOpenTimeouts"
	Verified             = "Verified"
	TimedOutCount        = "TimedOutCount"
	TimeWaitExpiredCount = "TimeWaitExpiredCount"

	// Events types
	Kernel          = "kernel"
	EnricherRing    = "enricher_ring"
	BufferedChannel = "buffered_channel"
	ExternalChannel = "external_channel"

	// TCP Flags
	SYN    = "SYN"
	SYNACK = "SYNACK"
	ACK    = "ACK"
	FIN    = "FIN"
	RST    = "RST"
	PSH    = "PSH"
	ECE    = "ECE"
	CWR    = "CWR"
	NS     = "NS"
	URG    = "URG"

	DataPlane = "dataplane"
	Linux     = "linux"
	Windows   = "windows"

	// DNS labels.
	DNSLabels = []string{"return_code", "query_type", "query", "response", "num_response"}
)
View Source 
var (
	DNSType_name = map[int32]string{
		0: "UNKNOWN",
		1: "QUERY",
		2: "RESPONSE",
	}
	DNSType_value = map[string]int32{
		"UNKNOWN":  0,
		"QUERY":    1,
		"RESPONSE": 2,
	}
)

Enum value maps for DNSType.

View Source 
var (
	DropReason_name = map[int32]string{
		0: "IPTABLE_RULE_DROP",
		1: "IPTABLE_NAT_DROP",
		2: "TCP_CONNECT_BASIC",
		3: "TCP_ACCEPT_BASIC",
		4: "TCP_CLOSE_BASIC",
		5: "CONNTRACK_ADD_DROP",
		6: "UNKNOWN_DROP",
	}
	DropReason_value = map[string]int32{
		"IPTABLE_RULE_DROP":  0,
		"IPTABLE_NAT_DROP":   1,
		"TCP_CONNECT_BASIC":  2,
		"TCP_ACCEPT_BASIC":   3,
		"TCP_CLOSE_BASIC":    4,
		"CONNTRACK_ADD_DROP": 5,
		"UNKNOWN_DROP":       6,
	}
)

Enum value maps for DropReason.

View Source 
var File_pkg_utils_metadata_proto protoreflect.FileDescriptor

Functions

func AddDNSInfo added in v0.0.9 

func AddDNSInfo(f *flow.Flow, meta *RetinaMetadata, qType string, rCode uint32, query string, qTypes []string, numAnswers int, ips []string)

AddDNSInfo adds DNS information to the flow's metadata.

func AddDropReason added in v0.0.9 

func AddDropReason(f *flow.Flow, meta *RetinaMetadata, dropReason uint32)

AddDropReason adds the drop reason to the flow's metadata.

func AddPacketSize 

func AddPacketSize(meta *RetinaMetadata, packetSize uint64)

AddPacketSize adds the packet size to the flow's metadata.

func AddRetinaMetadata added in v0.0.9 

func AddRetinaMetadata(f *flow.Flow, meta *RetinaMetadata)

AddRetinaMetadata adds the RetinaMetadata to the flow's extensions field.

func AddTCPFlags added in v0.0.9 

func AddTCPFlags(f *flow.Flow, syn, ack, fin, rst, psh, urg uint16)

func AddTCPID added in v0.0.9 

func AddTCPID(meta *RetinaMetadata, id uint64)

Add TSval/TSecr to the flow's metadata as TCP ID. The TSval/TSecr works as ID for the flow. We will use this ID to calculate latency.

func CompareStringSlice 

func CompareStringSlice(a, b []string) bool

func DNSRcodeToString added in v0.0.9 

func DNSRcodeToString(f *flow.Flow) string

DNS Return code to string.

func DecodeRequestBody 

func DecodeRequestBody(request *http.Request, iface interface{}) (err error)

func DropReasonDescription added in v0.0.9 

func DropReasonDescription(f *flow.Flow) string

func EncodeResponseBody 

func EncodeResponseBody(w http.ResponseWriter, iface interface{}) error

func GetInterface 

func GetInterface(name string, interfaceType string) (netlink.Link, error)

Get all the veth interfaces. Similar to ip link show type veth

func GetPluginEventAttributes 

func GetPluginEventAttributes(attrs []attribute.KeyValue, pluginName, eventName, timestamp string) []attribute.KeyValue

func GetTCPID added in v0.0.9 

func GetTCPID(f *flow.Flow) uint64

func HostToNetShort 

func HostToNetShort(i uint16) uint16

HostToNetShort converts a 16-bit integer from host to network byte order, aka "htons"

func Int2ip 

func Int2ip(nn uint32) net.IP

https://gist.github.com/ammario/649d4c0da650162efd404af23e25b86b

func Ip2int 

func Ip2int(ip []byte) (res uint32, err error)

func IsAdvancedMetric 

func IsAdvancedMetric(name string) bool

IsAdvancedMetric is a helper function to determine if a name is an advanced metric

func OpenRawSocket 

func OpenRawSocket(index int) (int, error)

func PacketSize 

func PacketSize(f *flow.Flow) uint64

func Retry 

func Retry(f func() error, retry int) (err error)

Exponential backoff retry logic.

func StringPtr 

func StringPtr(v string) *string

func ToFlow 

func ToFlow(
	ts int64,
	sourceIP, destIP net.IP,
	sourcePort, destPort uint32,
	proto uint8,
	observationPoint uint32,
	verdict flow.Verdict,
) *flow.Flow

ToFlow returns a flow.Flow object. This sets up a L3/L4 flow object. sourceIP, destIP are IPv4 addresses. sourcePort, destPort are TCP/UDP ports. proto is the protocol number. Ref: https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml . observationPoint is the observation point+direction of the flow. 0 is from n/w stack to container, 1 is from container to stack, 2 is from host to network and 3 is from network to host. ts is the timestamp in nanoseconds.

func Uint32Ptr 

func Uint32Ptr(v uint32) *uint32

Inspired by https://github.com/mauriciovasquezbernal/talks/blob/1f2080afe731949a033330c0adc290be8f3fc06d/2022-ebpf-training/2022-10-13/drop/main.go .

Types

type DNSType 

type DNSType int32
const (
	DNSType_UNKNOWN  DNSType = 0
	DNSType_QUERY    DNSType = 1
	DNSType_RESPONSE DNSType = 2
)

func GetDNS added in v0.0.9 

func GetDNS(f *flow.Flow) (*flow.DNS, DNSType, uint32)

func (DNSType) Descriptor 

func (DNSType) Descriptor() protoreflect.EnumDescriptor

func (DNSType) Enum 

func (x DNSType) Enum() *DNSType

func (DNSType) EnumDescriptor deprecated 

func (DNSType) EnumDescriptor() ([]byte, []int)

Deprecated: Use DNSType.Descriptor instead.

func (DNSType) Number 

func (x DNSType) Number() protoreflect.EnumNumber

func (DNSType) String 

func (x DNSType) String() string

func (DNSType) Type 

func (DNSType) Type() protoreflect.EnumType

type DropReason added in v0.0.9 

type DropReason int32

Ref: pkg/plugin/dropreason/_cprog/drop_reason.h. 

const (
	DropReason_IPTABLE_RULE_DROP  DropReason = 0
	DropReason_IPTABLE_NAT_DROP   DropReason = 1
	DropReason_TCP_CONNECT_BASIC  DropReason = 2
	DropReason_TCP_ACCEPT_BASIC   DropReason = 3
	DropReason_TCP_CLOSE_BASIC    DropReason = 4
	DropReason_CONNTRACK_ADD_DROP DropReason = 5
	DropReason_UNKNOWN_DROP       DropReason = 6
)

func (DropReason) Descriptor added in v0.0.9 

func (DropReason) Descriptor() protoreflect.EnumDescriptor

func (DropReason) Enum added in v0.0.9 

func (x DropReason) Enum() *DropReason

func (DropReason) EnumDescriptor deprecated added in v0.0.9 

func (DropReason) EnumDescriptor() ([]byte, []int)

Deprecated: Use DropReason.Descriptor instead.

func (DropReason) Number added in v0.0.9 

func (x DropReason) Number() protoreflect.EnumNumber

func (DropReason) String added in v0.0.9 

func (x DropReason) String() string

func (DropReason) Type added in v0.0.9 

func (DropReason) Type() protoreflect.EnumType

type RetinaMetadata 

type RetinaMetadata struct {
	Bytes uint64 `protobuf:"varint,1,opt,name=bytes,proto3" json:"bytes,omitempty"`
	// DNS metadata.
	DnsType      DNSType `protobuf:"varint,2,opt,name=dns_type,json=dnsType,proto3,enum=utils.DNSType" json:"dns_type,omitempty"`
	NumResponses uint32  `protobuf:"varint,3,opt,name=num_responses,json=numResponses,proto3" json:"num_responses,omitempty"`
	// TCP ID. Either Tsval or Tsecr will be set.
	TcpId uint64 `protobuf:"varint,4,opt,name=tcp_id,json=tcpId,proto3" json:"tcp_id,omitempty"`
	// Drop reason in Retina.
	DropReason DropReason `protobuf:"varint,5,opt,name=drop_reason,json=dropReason,proto3,enum=utils.DropReason" json:"drop_reason,omitempty"`
	// contains filtered or unexported fields
}

func (*RetinaMetadata) Descriptor deprecated 

func (*RetinaMetadata) Descriptor() ([]byte, []int)

Deprecated: Use RetinaMetadata.ProtoReflect.Descriptor instead.

func (*RetinaMetadata) GetBytes 

func (x *RetinaMetadata) GetBytes() uint64

func (*RetinaMetadata) GetDnsType 

func (x *RetinaMetadata) GetDnsType() DNSType

func (*RetinaMetadata) GetDropReason added in v0.0.9 

func (x *RetinaMetadata) GetDropReason() DropReason

func (*RetinaMetadata) GetNumResponses 

func (x *RetinaMetadata) GetNumResponses() uint32

func (*RetinaMetadata) GetTcpId 

func (x *RetinaMetadata) GetTcpId() uint64

func (*RetinaMetadata) ProtoMessage 

func (*RetinaMetadata) ProtoMessage()

func (*RetinaMetadata) ProtoReflect 

func (x *RetinaMetadata) ProtoReflect() protoreflect.Message

func (*RetinaMetadata) Reset 

func (x *RetinaMetadata) Reset()

func (*RetinaMetadata) String 

func (x *RetinaMetadata) String() string

Source Files

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