Count link and syscall failures instead of printing them

rx.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"hash/crc32"
 	"sync"
 	"sync/atomic"
@@ -15,7 +14,8 @@ type rxStats struct {
 	badMagic atomic.Uint64
 	badLen   atomic.Uint64
 	crcErr   atomic.Uint64
-	_        [24]byte
+	rxErrs   atomic.Uint64
+	_        [16]byte
 }
 
 type rxWorker struct {
@@ -24,7 +24,6 @@ type rxWorker struct {
 	spec    *frameSpec
 	stats   *rxStats
 	streams []lossWindow
-	reports chan string
 	ready   *sync.WaitGroup
 }
 
@@ -44,7 +43,7 @@ func (w *rxWorker) run(done *atomic.Bool) {
 		n, err := recvmmsg(w.fd, hdrs, unix.MSG_WAITFORONE)
 		if n <= 0 {
 			if err != nil && err != unix.EAGAIN && err != unix.EINTR {
-				w.report(fmt.Sprintf("recvmmsg: %v", err))
+				w.stats.rxErrs.Add(1)
 			}
 			continue
 		}
@@ -67,20 +66,9 @@ func (w *rxWorker) run(done *atomic.Bool) {
 				continue
 			}
 			pay := buf[minFrame : minFrame+p.payLen]
-			if crc32.Checksum(pay, crcTable) == p.crc {
-				continue
+			if crc32.Checksum(pay, crcTable) != p.crc {
+				w.stats.crcErr.Add(1)
 			}
-			w.stats.crcErr.Add(1)
-			off, bits := firstDiff(pay, w.spec.ref[:p.payLen])
-			w.report(fmt.Sprintf("payload mismatch stream=%d seq=%d len=%d first-diff-offset=%d bits=%d",
-				p.stream, p.seq, p.payLen, off, bits))
 		}
 	}
 }
-
-func (w *rxWorker) report(msg string) {
-	select {
-	case w.reports <- msg:
-	default:
-	}
-}