1 files changed, 0 insertions, 205 deletions
diff --git a/bpf/main.go b/bpf/main.go
deleted file mode 100644
index d956a9b..0000000
--- a/bpf/main.go
+++ /dev/null
@@ -1,205 +0,0 @@
-package bpf
-
-import (
-	"context"
-	"errors"
-	"log"
-	"net"
-	"os"
-	"os/signal"
-	"syscall"
-	"time"
-
-	"github.com/cilium/ebpf"
-	"github.com/cilium/ebpf/link"
-	"github.com/jackc/pgx/v5/pgtype"
-	"sinanmohd.com/redq/db"
-)
-
-type UsageStat struct {
-	lastSeen         time.Time
-	lastDbPush       time.Time
-	bandwidthIngress uint64
-	bandwidthEgress  uint64
-	ingress          uint64
-	egress           uint64
-}
-type UsageMap map[uint64]UsageStat
-
-func Run(iface *net.Interface, queries *db.Queries, ctxDb context.Context) {
-	usageMap := make(UsageMap)
-
-	objs := bpfObjects{}
-	if err := loadBpfObjects(&objs, nil); err != nil {
-		log.Fatalf("loading objects: %s", err)
-	}
-	defer objs.Close()
-
-	ingressLink, err := link.AttachTCX(link.TCXOptions{
-		Interface: iface.Index,
-		Program:   objs.IngressFunc,
-		Attach:    ebpf.AttachTCXIngress,
-	})
-	if err != nil {
-		log.Fatalf("could not attach TCx program: %s", err)
-	}
-	defer ingressLink.Close()
-
-	egressLink, err := link.AttachTCX(link.TCXOptions{
-		Interface: iface.Index,
-		Program:   objs.EgressFunc,
-		Attach:    ebpf.AttachTCXEgress,
-	})
-	if err != nil {
-		log.Fatalf("could not attach TCx program: %s", err)
-	}
-	defer egressLink.Close()
-
-	bpfTicker := time.NewTicker(time.Second)
-	defer bpfTicker.Stop()
-	dbTicker := time.NewTicker(time.Minute)
-	defer dbTicker.Stop()
-	sigs := make(chan os.Signal, 1)
-	signal.Notify(sigs, os.Interrupt, os.Kill, syscall.SIGTERM)
-
-	for {
-		select {
-		case <-bpfTicker.C:
-			err := usageMap.update(objs.IngressIp4UsageMap, objs.EgressIp4UsageMap)
-			if err != nil {
-				log.Printf("updating usageMap: %s", err)
-			}
-		case <-sigs:
-			err := usageMap.updateDb(queries, ctxDb, false)
-			if err != nil {
-				log.Printf("updating Database: %s", err)
-			}
-			os.Exit(0)
-		case <-dbTicker.C:
-			err := usageMap.updateDb(queries, ctxDb, true)
-			if err != nil {
-				log.Printf("updating Database: %s", err)
-			}
-		}
-	}
-}
-
-func (usageStat UsageStat) expired(timeStart *time.Time) bool {
-	timeDiff := timeStart.Sub(usageStat.lastSeen)
-	if timeDiff > time.Minute {
-		return true
-	}
-
-	timeDiff = timeStart.Sub(usageStat.lastDbPush)
-	if timeDiff > time.Hour {
-		return true
-	}
-
-	return false
-}
-
-func (usageMap UsageMap) updateDb(queries *db.Queries, ctxDb context.Context, ifExpired bool) error {
-	timeStart := time.Now()
-
-	for key, value := range usageMap {
-		if ifExpired && !value.expired(&timeStart) {
-			continue
-		}
-
-		err := queries.EnterUsage(ctxDb, db.EnterUsageParams{
-			Hardwareaddr: int64(key),
-			Starttime: pgtype.Timestamp{
-				Time:  value.lastDbPush,
-				Valid: true,
-			},
-			Stoptime: pgtype.Timestamp{
-				Time:  value.lastSeen,
-				Valid: true,
-			},
-			Egress:  int64(value.egress),
-			Ingress: int64(value.ingress),
-		})
-		if err != nil {
-			return err
-		}
-
-		delete(usageMap, key)
-	}
-
-	return nil
-}
-
-func (usageMap UsageMap) update(ingress *ebpf.Map, egress *ebpf.Map) error {
-	timeStart := time.Now()
-	batchKeys := make([]uint64, 4096)
-	batchValues := make([]uint64, 4096)
-	var key uint64
-
-	cursor := ebpf.MapBatchCursor{}
-	for {
-		_, err := ingress.BatchLookupAndDelete(&cursor, batchKeys, batchValues, nil)
-		for i := range batchKeys {
-			/* TODO: maybe BatchLookupAndDelete is not the best idea with mostly empty map */
-			if batchValues[i] == 0 {
-				continue
-			}
-
-			key = batchKeys[i]
-			usage, ok := usageMap[key]
-			if ok {
-				usage.bandwidthIngress = batchValues[i] - usage.ingress
-				usage.ingress += batchValues[i]
-				usage.lastSeen = timeStart
-				usageMap[key] = usage
-			} else {
-				usageMap[key] = UsageStat{
-					bandwidthIngress: batchValues[i],
-					ingress:          batchValues[i],
-					lastDbPush:       timeStart,
-					lastSeen:         timeStart,
-				}
-			}
-		}
-
-		if errors.Is(err, ebpf.ErrKeyNotExist) {
-			break
-		} else if err != nil {
-			return err
-		}
-	}
-
-	cursor = ebpf.MapBatchCursor{}
-	for {
-		_, err := egress.BatchLookupAndDelete(&cursor, batchKeys, batchValues, nil)
-		for i := range batchKeys {
-			/* TODO: maybe BatchLookupAndDelete is not the best idea with mostly empty map */
-			if batchValues[i] == 0 {
-				continue
-			}
-
-			key = batchKeys[i]
-			usage, ok := usageMap[key]
-			if ok {
-				usage.bandwidthEgress = batchValues[i] - usage.egress
-				usage.egress += batchValues[i]
-				usage.lastSeen = timeStart
-				usageMap[key] = usage
-			} else {
-				usageMap[key] = UsageStat{
-					bandwidthEgress: batchValues[i],
-					egress:          batchValues[i],
-					lastDbPush:      timeStart,
-					lastSeen:        timeStart,
-				}
-			}
-		}
-
-		if errors.Is(err, ebpf.ErrKeyNotExist) {
-			break
-		} else if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}