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traffic.go
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traffic.go
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package illumioapi
import (
"bufio"
"encoding/csv"
"encoding/json"
"fmt"
"io"
"math"
"net"
"net/url"
"os"
"strconv"
"strings"
"time"
)
// TrafficAnalysisRequest represents the payload object for the traffic analysis POST request
type TrafficAnalysisRequest struct {
Sources Sources `json:"sources"`
Destinations Destinations `json:"destinations"`
ExplorerServices ExplorerServices `json:"services"`
StartDate time.Time `json:"start_date,omitempty"`
EndDate time.Time `json:"end_date,omitempty"`
PolicyDecisions []string `json:"policy_decisions"`
MaxResults int `json:"max_results,omitempty"`
SourcesDestinationsQueryOp string `json:"sources_destinations_query_op,omitempty"`
}
// Sources represents the sources query portion of the explorer API
type Sources struct {
Include [][]Include `json:"include"`
Exclude []Exclude `json:"exclude"`
}
// ExplorerServices represent services to be included or excluded in the explorer query
type ExplorerServices struct {
Include []Include `json:"include"`
Exclude []Exclude `json:"exclude"`
}
//Destinations represents the destination query portion of the explorer API
type Destinations struct {
Include [][]Include `json:"include"`
Exclude []Exclude `json:"exclude"`
}
// PortProtos represents the ports and protocols query portion of the exporer API
type PortProtos struct {
Include []Include `json:"include"`
Exclude []Exclude `json:"exclude"`
}
// Include represents the type of objects used in an include query.
// The include struct should be label only, workload only, IP address only, Port and/or protocol only.
// Example - Label and Workload cannot both be non-nil
// Example - Port and Proto can both be non-nil (e.g., port 3306 and proto 6)
type Include struct {
Label *Label `json:"label,omitempty"`
Workload *Workload `json:"workload,omitempty"`
IPList *IPList `json:"ip_list,omitempty"`
IPAddress *IPAddress `json:"ip_address,omitempty"`
Port int `json:"port,omitempty"`
ToPort int `json:"to_port,omitempty"`
Proto int `json:"proto,omitempty"`
Process string `json:"process_name,omitempty"`
WindowsService string `json:"windows_service_name,omitempty"`
}
// Exclude represents the type of objects used in an include query.
// The exclude struct should only have the following combinations: label only, workload only, IP address only, Port and/or protocol only.
// Example - Label and Workload cannot both be non-nil
// Example - Port and Proto can both be non-nil (e.g., port 3306 and proto 6)
type Exclude struct {
Label *Label `json:"label,omitempty"`
Workload *Workload `json:"workload,omitempty"`
IPList *IPList `json:"ip_list,omitempty"`
IPAddress *IPAddress `json:"ip_address,omitempty"`
Port int `json:"port,omitempty"`
ToPort int `json:"to_port,omitempty"`
Proto int `json:"proto,omitempty"`
Process string `json:"process_name,omitempty"`
WindowsService string `json:"windows_service_name,omitempty"`
Transmission string `json:"transmission,omitempty"`
}
// IPAddress represents an IP Address
type IPAddress struct {
Value string `json:"value,omitempty"`
}
// TrafficAnalysis represents the response from the explorer API
type TrafficAnalysis struct {
Dst *Dst `json:"dst"`
NumConnections int `json:"num_connections"`
PolicyDecision string `json:"policy_decision"`
ExpSrv *ExpSrv `json:"service"`
Src *Src `json:"src"`
TimestampRange *TimestampRange `json:"timestamp_range"`
Transmission string `json:"transmission"`
}
// ExpSrv is a service in the explorer response
type ExpSrv struct {
Port int `json:"port,omitempty"`
Proto int `json:"proto,omitempty"`
Process string `json:"process_name,omitempty"`
User string `json:"user_name,omitempty"`
WindowsService string `json:"windows_service_name,omitempty"`
}
// Dst is the provider workload details
type Dst struct {
IP string `json:"ip"`
Workload *Workload `json:"workload,omitempty"`
FQDN string `json:"fqdn,omitempty"`
IPLists *[]*IPList `json:"ip_lists"`
}
// Src is the consumer workload details
type Src struct {
IP string `json:"ip"`
Workload *Workload `json:"workload,omitempty"`
FQDN string `json:"fqdn,omitempty"`
IPLists *[]*IPList `json:"ip_lists"`
}
// TimestampRange is used to limit queries ranges for the flow detected
type TimestampRange struct {
FirstDetected string `json:"first_detected"`
LastDetected string `json:"last_detected"`
}
// TrafficQuery is the struct to be passed to the GetTrafficAnalysis function
type TrafficQuery struct {
SourcesInclude [][]string
SourcesExclude []string
DestinationsInclude [][]string
DestinationsExclude []string
// PortProtoInclude and PortProtoExclude entries should be in the format of [port, protocol]
// Example [80, 6] is Port 80 TCP.
PortProtoInclude [][2]int
PortProtoExclude [][2]int
// PortRangeInclude and PortRangeExclude entries should be of the format [fromPort, toPort, protocol]
// Example - [1000, 2000, 6] is Ports 1000-2000 TCP.
PortRangeInclude [][3]int
PortRangeExclude [][3]int
ProcessInclude []string
WindowsServiceInclude []string
ProcessExclude []string
WindowsServiceExclude []string
StartTime time.Time
EndTime time.Time
PolicyStatuses []string
MaxFLows int
TransmissionExcludes []string // Example: []string{"broadcast", "multicast"} will only get unicast traffic
QueryOperator string // Value should be "and" or "or". "and" is used by default
}
// FlowUploadResp is the response from the traffic upload API
type FlowUploadResp struct {
NumFlowsReceived int `json:"num_flows_received"`
NumFlowsFailed int `json:"num_flows_failed"`
FailedFlows []*string `json:"failed_flows,omitempty"`
}
// UploadFlowResults is the struct returned to the user when using the pce.UploadTraffic() method
type UploadFlowResults struct {
FlowResps []FlowUploadResp
APIResps []APIResponse
TotalFlowsInCSV int
}
// GetTrafficAnalysis gets flow data from Explorer.
func (p *PCE) GetTrafficAnalysis(q TrafficQuery) ([]TrafficAnalysis, APIResponse, error) {
// Includes
// Create the two Include slices using make so JSON is marshaled with empty arrays and not null values to meet Illumio API spec.
sourceInc := make([][]Include, 0)
destInc := make([][]Include, 0)
// Populate a slice with our provided query lists
includeQueryLists := [][][]string{q.SourcesInclude, q.DestinationsInclude}
// Create a slice of pointers to the newly created slices. So we can fill in the iterations.
inclTargets := []*[][]Include{&sourceInc, &destInc}
// Iterate through the q.SourcesInclude (n=0) and q.DestinationsInclude (n=1)
for n, includeQueryList := range includeQueryLists {
// Iterate through each includeArray
for _, includeArray := range includeQueryList {
if len(includeArray) > 0 {
// Create the inside array
insideInc := []Include{}
// Iterate through each and fill the inside Array
for _, a := range includeArray {
switch ParseObjectType(a) {
case "label":
insideInc = append(insideInc, Include{Label: &Label{Href: a}})
case "workload":
insideInc = append(insideInc, Include{Workload: &Workload{Href: a}})
case "iplist":
insideInc = append(insideInc, Include{IPList: &IPList{Href: a}})
case "unknown":
if net.ParseIP(a) == nil {
v := "source"
if n != 0 {
v = "destination"
}
return nil, APIResponse{}, fmt.Errorf("provided %s include is not label, workload, iplist, or ip address", v)
}
insideInc = append(insideInc, Include{IPAddress: &IPAddress{Value: a}})
}
}
// Append the inside array to the correct outter array
*inclTargets[n] = append(*inclTargets[n], insideInc)
} else {
*inclTargets[n] = append(*inclTargets[n], make([]Include, 0))
}
}
}
// Excludes
// Create the two Exclude slices using make so JSON is marshaled with empty arrays and not null values to meet Illumio API spec.
sourceExcl, destExcl := make([]Exclude, 0), make([]Exclude, 0)
// Create a slice of pointers to the newly created slices. So we can fill in the iterations.
exclTargets := []*[]Exclude{&sourceExcl, &destExcl}
// Populate a slice with our provided query lists
excludeQueryLists := [][]string{q.SourcesExclude, q.DestinationsExclude}
for n, excludeQueryList := range excludeQueryLists {
var pceObjType string
for i, exclude := range excludeQueryList {
// Set the type based on the first entry
if i == 0 {
pceObjType = ParseObjectType(exclude)
}
// If it's a different object type, we need to error.
if ParseObjectType(exclude) != pceObjType {
v := "source"
if n != 0 {
v = "destination"
}
return nil, APIResponse{}, fmt.Errorf("provided %s excludes are not of the same type", v)
}
// Add to the exclude
switch pceObjType {
case "label":
*exclTargets[n] = append(*exclTargets[n], Exclude{Label: &Label{Href: exclude}})
case "workload":
*exclTargets[n] = append(*exclTargets[n], Exclude{Workload: &Workload{Href: exclude}})
case "iplist":
*exclTargets[n] = append(*exclTargets[n], Exclude{IPList: &IPList{Href: exclude}})
case "unknown":
if net.ParseIP(exclude) == nil {
v := "source"
if n != 0 {
v = "destination"
}
return nil, APIResponse{}, fmt.Errorf("provided %s exclude is not label, workload, iplist, or ip address", v)
}
*exclTargets[n] = append(*exclTargets[n], Exclude{IPAddress: &IPAddress{Value: exclude}})
}
}
}
// Services
// Create the array
serviceInclude := make([]Include, 0)
serviceExclude := make([]Exclude, 0)
// Port and protocol - include
for _, portProto := range q.PortProtoInclude {
serviceInclude = append(serviceInclude, Include{Port: portProto[0], Proto: portProto[1]})
}
// Port and protocol - exclude
for _, portProto := range q.PortProtoExclude {
serviceExclude = append(serviceExclude, Exclude{Port: portProto[0], Proto: portProto[1]})
}
// Port Range - include
for _, portRange := range q.PortRangeInclude {
serviceInclude = append(serviceInclude, Include{Port: portRange[0], ToPort: portRange[1], Proto: portRange[2]})
}
// Port Range - exclude
for _, portRange := range q.PortRangeExclude {
serviceExclude = append(serviceExclude, Exclude{Port: portRange[0], ToPort: portRange[1], Proto: portRange[2]})
}
// Process - include
for _, process := range q.ProcessInclude {
serviceInclude = append(serviceInclude, Include{Process: process})
}
// Process - exclude
for _, process := range q.ProcessExclude {
serviceExclude = append(serviceExclude, Exclude{Process: process})
}
// Windows Service - include
for _, winSrv := range q.WindowsServiceInclude {
serviceInclude = append(serviceInclude, Include{WindowsService: winSrv})
}
// Windows Service - exclude
for _, winSrv := range q.WindowsServiceExclude {
serviceExclude = append(serviceExclude, Exclude{WindowsService: winSrv})
}
// Traffic transmission type
for _, excl := range q.TransmissionExcludes {
destExcl = append(destExcl, Exclude{Transmission: excl})
}
// Build the TrafficAnalysisRequest struct
traffic := TrafficAnalysisRequest{
Sources: Sources{
Include: sourceInc,
Exclude: sourceExcl},
Destinations: Destinations{
Include: destInc,
Exclude: destExcl},
ExplorerServices: ExplorerServices{
Include: serviceInclude,
Exclude: serviceExclude},
PolicyDecisions: q.PolicyStatuses,
StartDate: q.StartTime,
EndDate: q.EndTime,
MaxResults: q.MaxFLows}
// We are going to edit it here so we can omit if necessary
if strings.ToLower(q.QueryOperator) == "or" || strings.ToLower(q.QueryOperator) == "and" {
traffic.SourcesDestinationsQueryOp = strings.ToLower(q.QueryOperator)
}
trafficResponses, api, err := p.GetTrafficAnalysisAPI(traffic)
if err != nil {
return nil, api, err
}
return trafficResponses, api, nil
}
// GetTrafficAnalysisAPI gets flow data from Explorer.
func (p *PCE) GetTrafficAnalysisAPI(t TrafficAnalysisRequest) ([]TrafficAnalysis, APIResponse, error) {
var api APIResponse
// Create JSON Payload
jsonPayload, err := json.Marshal(t)
if err != nil {
return nil, api, fmt.Errorf("get traffic analysis - %s", err)
}
var trafficResponses []TrafficAnalysis
// Build the API URL
apiURL, err := url.Parse("https://" + pceSanitization(p.FQDN) + ":" + strconv.Itoa(p.Port) + "/api/v2/orgs/" + strconv.Itoa(p.Org) + "/traffic_flows/traffic_analysis_queries")
if err != nil {
return nil, api, fmt.Errorf("get traffic analysis - %s", err)
}
// Call the API
api, err = apicall("POST", apiURL.String(), *p, jsonPayload, false)
api.ReqBody = string(jsonPayload)
if err != nil {
return nil, api, fmt.Errorf("get traffic analysis - %s", err)
}
// Unmarshal response to struct
json.Unmarshal([]byte(api.RespBody), &trafficResponses)
return trafficResponses, api, nil
}
// IterateTraffic returns an array of traffic analysis .
// The iterative query starts by running a blank explorer query. If the results are over 90K, it queries again by TCP, UDP, and other.
// If either protocol-specific query is over 90K, it queries again by TCP and UDP port.
func (p *PCE) IterateTraffic(q TrafficQuery, stdout bool) ([]TrafficAnalysis, error) {
i, err := p.IterateTrafficJString(q, stdout)
if err != nil {
return nil, err
}
var t []TrafficAnalysis
json.Unmarshal([]byte(i), &t)
if stdout {
fmt.Printf("%s [INFO] - Final combined traffic export: %d records\r\n", time.Now().Format("2006-01-02 15:04:05 "), len(t))
}
return t, nil
}
// Threshold is the value set to iterate
var Threshold int
// IterateTrafficJString returns the combined JSON output from an iterative exlplorer query.
// The iterative query starts by running a blank explorer query. If the results are over threshold, it queries again by TCP, UDP, and other.
// If either protocol-specific query is over 90K, it queries again by TCP and UDP port.
func (p *PCE) IterateTrafficJString(q TrafficQuery, stdout bool) (string, error) {
// If the threshold isn't set by app, use 90000
if Threshold == 0 {
Threshold = 90000
}
// Get all explorer data to see where we are starting
t, a, _ := p.GetTrafficAnalysis(q)
if stdout {
fmt.Printf("%s [INFO] - Initial traffic query: %d records\r\n", time.Now().Format("2006-01-02 15:04:05 "), len(t))
}
// If the length is under Threshold return it and be done
if len(t) < Threshold {
if stdout {
fmt.Printf("%s [INFO] - Traffic querying completed\r\n", time.Now().Format("2006-01-02 15:04:05 "))
}
return a.RespBody, nil
}
if stdout {
fmt.Printf("%s [INFO] - Traffic records close to threshold (%d) - beginning query by protocol...\r\n", time.Now().Format("2006-01-02 15:04:05 "), Threshold)
}
// If we are over Threshold, run the query again for TCP, UDP, and everything else.
// TCP
q.PortProtoInclude = [][2]int{[2]int{0, 6}}
tcpT, tcpA, err := p.GetTrafficAnalysis(q)
if err != nil {
return "", err
}
if stdout {
fmt.Printf("%s [INFO] - TCP traffic query: %d records\r\n", time.Now().Format("2006-01-02 15:04:05 "), len(tcpT))
}
// UDP
q.PortProtoInclude = [][2]int{[2]int{0, 17}}
udpT, udpA, err := p.GetTrafficAnalysis(q)
if err != nil {
return "", err
}
if stdout {
fmt.Printf("%s [INFO] - UDP traffic query: %d records\r\n", time.Now().Format("2006-01-02 15:04:05 "), len(udpT))
}
// Other Protos
q.PortProtoInclude = nil
q.PortProtoExclude = [][2]int{[2]int{0, 6}, [2]int{0, 17}}
otherProtoT, otherProtoA, err := p.GetTrafficAnalysis(q)
if err != nil {
return "", err
}
if stdout {
fmt.Printf("%s [INFO] - Other traffic query: %d records\r\n", time.Now().Format("2006-01-02 15:04:05 "), len(otherProtoT))
}
// Create a variable to hold final JSON strings and start with other protocols
finalJSONSet := []string{otherProtoA.RespBody}
// Process if TCP is over Threshold
if len(tcpT) > Threshold {
if stdout {
fmt.Printf("%s [INFO] - TCP entries close to threshold (%d), querying by TCP port...\r\n", time.Now().Format("2006-01-02 15:04:05 "), Threshold)
}
q.PortProtoInclude = [][2]int{[2]int{0, 6}}
q.PortProtoExclude = nil
s, err := iterateOverPorts(*p, q, tcpT, stdout)
if err != nil {
return "", err
}
finalJSONSet = append(finalJSONSet, s)
} else {
finalJSONSet = append(finalJSONSet, tcpA.RespBody)
}
// Process if UDP is over Threshold
if len(udpT) > Threshold {
if stdout {
fmt.Printf("%s [INFO] - UDP entries close to threshold (%d), querying by UDP port...\r\n", time.Now().Format("2006-01-02 15:04:05 "), Threshold)
}
q.PortProtoInclude = [][2]int{[2]int{0, 17}}
q.PortProtoExclude = nil
s, err := iterateOverPorts(*p, q, udpT, stdout)
if err != nil {
return "", err
}
finalJSONSet = append(finalJSONSet, s)
} else {
finalJSONSet = append(finalJSONSet, udpA.RespBody)
}
// Marshall the final set to get a count
var FinalSet []TrafficAnalysis
s := combineTrafficBodies(finalJSONSet)
json.Unmarshal([]byte(s), &FinalSet)
// Combine sets and return
return combineTrafficBodies(finalJSONSet), nil
}
func combineTrafficBodies(traffic []string) string {
combinedTraffic := []string{}
for _, t := range traffic {
// Skip if no entries
if len(t) < 3 {
continue
}
// Remove the first bracket
s := strings.TrimPrefix(t, "[")
s = strings.TrimSuffix(s, "]")
combinedTraffic = append(combinedTraffic, s)
}
return fmt.Sprintf("%s%s%s", "[", strings.Join(combinedTraffic, ","), "]")
}
func iterateOverPorts(p PCE, tq TrafficQuery, protoResults []TrafficAnalysis, stdout bool) (string, error) {
// The future exclude is used in the last query to cover any target protocol ports we didn't see originally
futureExclude := [][2]int{}
// Get what protocol we are iterating. If we are iterating TCP, we exlude all UDP from final query and vice-versa
var proto string
var protoNum int
if protoResults[0].ExpSrv.Proto == 6 {
proto = "TCP"
protoNum = 6
futureExclude = append(futureExclude, [2]int{0, 17}, [2]int{0, 1})
}
if protoResults[0].ExpSrv.Proto == 17 {
proto = "UDP"
protoNum = 17
futureExclude = append(futureExclude, [2]int{0, 6}, [2]int{0, 1})
}
// Clear the exclude
tq.PortProtoExclude = [][2]int{}
// Make our port map to know what we need to iterate over
ports := make(map[int]int)
for _, t := range protoResults {
ports[t.ExpSrv.Port] = 6
}
// Iterate through each port
iterator := 0
jsonSlice := []string{}
for i := range ports {
iterator++
if stdout {
fmt.Printf("\r ")
fmt.Printf("\r%s [INFO] - Querying %s Port %d - %d of %d (%d%%)", time.Now().Format("2006-01-02 15:04:05 "), proto, i, iterator, len(ports), int(iterator*100/len(ports)))
}
tq.PortProtoInclude = [][2]int{[2]int{i, protoNum}}
_, a, err := p.GetTrafficAnalysis(tq)
if err != nil {
return "", err
}
jsonSlice = append(jsonSlice, a.RespBody)
futureExclude = append(futureExclude, [2]int{i, protoNum})
}
// Run one more time exclude all previous queries
if stdout {
fmt.Printf("\r ")
fmt.Printf("\r%s [INFO] - Completed querying %d %s ports \r\n", time.Now().Format("2006-01-02 15:04:05 "), len(ports), proto)
}
tq.PortProtoInclude = [][2]int{}
tq.PortProtoExclude = futureExclude // Problem is right here. Grabbing UDP
_, a, err := p.GetTrafficAnalysis(tq)
if stdout {
fmt.Printf("%s [INFO] - Completed querying all other %s ports not included in original set.\r\n", time.Now().Format("2006-01-02 15:04:05 "), proto)
}
if err != nil {
return "", err
}
jsonSlice = append(jsonSlice, a.RespBody)
return combineTrafficBodies(jsonSlice), nil
}
// UploadTraffic uploads a csv to the PCE with traffic flows.
// filename should be the path to a csv file with 4 cols: src_ip, dst_ip, port, protocol (IANA numerical format 6=TCP, 17=UDP)
// When headerLine = true, the first line of the CSV is skipped.
// If there are more than 999 entries in the CSV, it creates chunks of 999
func (p *PCE) UploadTraffic(filename string, headerLine bool) (UploadFlowResults, error) {
// Open CSV File
file, err := os.Open(filename)
if err != nil {
return UploadFlowResults{}, err
}
defer file.Close()
reader := csv.NewReader(clearBom(bufio.NewReader(file)))
// Start the counters
i := 0
// flows slice will contain each entry from the csv. the entries will be comma separated and we'll eventually join them with line break (/n)
var flows []string
// Iterate through CSV entries
for {
// Read the line
line, err := reader.Read()
if err == io.EOF {
break
}
// Increment the counter
i++
// Skip the headerline if we need to
if headerLine && i == 1 {
continue
}
if err != nil {
return UploadFlowResults{}, err
}
// Append line to flows
flows = append(flows, fmt.Sprintf("%s,%s,%s,%s", line[0], line[1], line[2], line[3]))
}
// Figure out how many API calls we need to make
numAPICalls := int(math.Ceil(float64(len(flows)) / 1000))
flowSlices := [][]string{}
// Build the array to be passed to the API
for i := 0; i < numAPICalls; i++ {
// Get 1,000 elements if this is not the last array
if (i + 1) != numAPICalls {
flowSlices = append(flowSlices, flows[i*1000:(1+i)*1000])
// If it's the last call, get the rest of the entries
} else {
flowSlices = append(flowSlices, flows[i*1000:])
}
}
// Build the API URL
apiURL, err := url.Parse("https://" + pceSanitization(p.FQDN) + ":" + strconv.Itoa(p.Port) + "/api/v2/orgs/" + strconv.Itoa(p.Org) + "/agents/bulk_traffic_flows")
if err != nil {
return UploadFlowResults{}, err
}
// Build response struct
t := i
if headerLine {
t = i - 1
}
results := UploadFlowResults{TotalFlowsInCSV: t}
for _, fs := range flowSlices {
// Call the API
api, err := apicallNoContentType("POST", apiURL.String(), *p, []byte(strings.Join(fs, "\n")), false)
results.APIResps = append(results.APIResps, api)
if err != nil {
return results, err
}
// Unmarshal response
flowResults := FlowUploadResp{}
json.Unmarshal([]byte(api.RespBody), &flowResults)
results.FlowResps = append(results.FlowResps, flowResults)
}
// Return data and nil error
return results, nil
}
// clearBOM returns an io.Reader that will skip over initial UTF-8 byte order marks.
func clearBom(r io.Reader) io.Reader {
buf := bufio.NewReader(r)
b, err := buf.Peek(3)
if err != nil {
// not enough bytes
return buf
}
if b[0] == 0xef && b[1] == 0xbb && b[2] == 0xbf {
buf.Discard(3)
}
return buf
}
// DedupeExplorerTraffic takes two traffic responses and returns a de-duplicated result set
func DedupeExplorerTraffic(first, second []TrafficAnalysis) []TrafficAnalysis {
var new []TrafficAnalysis
firstMap := make(map[string]bool)
for _, entry := range first {
firstMap[createExplorerMapKey(entry)] = true
new = append(new, entry)
}
for _, entry := range second {
if !firstMap[createExplorerMapKey(entry)] {
new = append(new, entry)
}
}
return new
}
func createExplorerMapKey(entry TrafficAnalysis) string {
key := entry.Dst.FQDN + entry.Dst.IP
if entry.Dst.Workload != nil {
key = key + entry.Dst.Workload.Hostname
}
key = key + strconv.Itoa(entry.ExpSrv.Port) + entry.ExpSrv.Process + strconv.Itoa(entry.ExpSrv.Proto) + entry.ExpSrv.User + entry.ExpSrv.WindowsService + strconv.Itoa(entry.NumConnections) + entry.PolicyDecision + entry.Src.FQDN + entry.Src.IP
if entry.Src.Workload != nil {
key = key + entry.Src.Workload.Hostname
}
key = key + entry.TimestampRange.FirstDetected + entry.TimestampRange.LastDetected + entry.Transmission
return key
}