Improve logging and make linter happy

firewall/interception/ebpf/bandwidth/interface.go

@@ -142,6 +142,9 @@ func reportBandwidth(ctx context.Context, objs bpfObjects, bandwidthUpdates chan
 		case bandwidthUpdates <- update:
 		case <-ctx.Done():
 			return
+		default:
+			log.Warning("ebpf: bandwidth update queue is full, skipping rest of batch")
+			return
 		}
 	}
 }

firewall/interception/ebpf/connection_listener/worker.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net"
 	"sync/atomic"
+	"time"
 
 	"github.com/cilium/ebpf/link"
 	"github.com/cilium/ebpf/ringbuf"
@@ -112,6 +113,7 @@ func ConnectionListenerWorker(ctx context.Context, packets chan packet.Packet) e
 			Src:      convertArrayToIPv4(event.Saddr, packet.IPVersion(event.IpVersion)),
 			Dst:      convertArrayToIPv4(event.Daddr, packet.IPVersion(event.IpVersion)),
 			PID:      int(event.Pid),
+			SeenAt:   time.Now(),
 		})
 		if isEventValid(event) {
 			// DEBUG:

firewall/interception/windowskext/bandwidth_stats.go

@@ -55,7 +55,7 @@ func reportBandwidth(ctx context.Context, bandwidthUpdates chan *packet.Bandwidt
 	}
 
 	// Report all statistics.
-	for _, stat := range stats {
+	for i, stat := range stats {
 		connID := packet.CreateConnectionID(
 			packet.IPProtocol(stat.protocol),
 			convertArrayToIP(stat.localIP, stat.ipV6 == 1), stat.localPort,
@@ -72,6 +72,9 @@ func reportBandwidth(ctx context.Context, bandwidthUpdates chan *packet.Bandwidt
 		case bandwidthUpdates <- update:
 		case <-ctx.Done():
 			return nil
+		default:
+			log.Warningf("kext: bandwidth update queue is full, skipping rest of batch (%d entries)", len(stats)-i)
+			return nil
 		}
 	}