Per-packet source tracking in transport, via/from in info output

cmd/picomap/main.go

@@ -50,9 +50,10 @@ type deviceResult struct {
 	err  error
 }
 
-func printInfo(dev string, info *client.ResponseInfo) {
+func printInfo(via string, from string, info *client.ResponseInfo) {
 	slog.Info("device",
-		"dev", dev,
+		"via", via,
+		"from", from,
 		"board_id", hex.EncodeToString(info.BoardID[:]),
 		"mac", net.HardwareAddr(info.MAC[:]).String(),
 		"ip", net.IP(info.IP[:]).String(),
@@ -86,8 +87,8 @@ func cmdInfo(args []string) error {
 		if len(infos) == 0 {
 			return fmt.Errorf("no devices responded")
 		}
-		for _, info := range infos {
-			printInfo(net.IP(info.IP[:]).String(), info)
+		for _, r := range infos {
+			printInfo(*udpAddr, r.From, r.Value)
 		}
 		return nil
 	}
@@ -126,7 +127,7 @@ func cmdInfo(args []string) error {
 			slog.Error("device error", "dev", r.dev, "err", r.err)
 			continue
 		}
-		printInfo(r.dev, r.info)
+		printInfo(r.dev, r.dev, r.info)
 	}
 
 	return nil