| 43 | } |
| 44 | |
| 45 | func (mod *CANModule) startDumpReader() error { |
| 46 | mod.Info("loading CAN dump from %s ...", mod.dumpName) |
| 47 | |
| 48 | file, err := os.Open(mod.dumpName) |
| 49 | if err != nil { |
| 50 | return err |
| 51 | } |
| 52 | defer file.Close() |
| 53 | |
| 54 | entries := make([]dumpEntry, 0) |
| 55 | |
| 56 | scanner := bufio.NewScanner(file) |
| 57 | for scanner.Scan() { |
| 58 | if line := str.Trim(scanner.Text()); line != "" { |
| 59 | if m := dumpLineParser.FindStringSubmatch(line); len(m) != 4 { |
| 60 | mod.Warning("unexpected line: '%s' -> %d matches", line, len(m)) |
| 61 | } else if timeval, err := parseTimeval(m[1]); err != nil { |
| 62 | mod.Warning("can't parse (seconds.microseconds) from line: '%s': %v", line, err) |
| 63 | } else { |
| 64 | entries = append(entries, dumpEntry{ |
| 65 | Time: timeval, |
| 66 | Device: m[2], |
| 67 | Frame: m[3], |
| 68 | }) |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | if err = scanner.Err(); err != nil { |
| 74 | return err |
| 75 | } |
| 76 | |
| 77 | numEntries := len(entries) |
| 78 | lastEntry := numEntries - 1 |
| 79 | |
| 80 | mod.Info("loaded %d entries from candump log", numEntries) |
| 81 | |
| 82 | go func() { |
| 83 | mod.Info("candump reader started ...") |
| 84 | |
| 85 | for i, entry := range entries { |
| 86 | frame := can.Frame{} |
| 87 | if err := frame.UnmarshalString(entry.Frame); err != nil { |
| 88 | mod.Error("could not unmarshal CAN frame: %v", err) |
| 89 | continue |
| 90 | } |
| 91 | |
| 92 | if mod.dumpInject { |
| 93 | if err := mod.send.TransmitFrame(context.Background(), frame); err != nil { |
| 94 | mod.Error("could not send CAN frame: %v", err) |
| 95 | } |
| 96 | } else { |
| 97 | mod.onFrame(frame) |
| 98 | } |
| 99 | |
| 100 | // compute delay before the next frame |
| 101 | if i < lastEntry { |
| 102 | next := entries[i+1] |