| 26 | } |
| 27 | |
| 28 | func parseIfconfigOutput(output []byte) (*iface, error) { |
| 29 | // TODO: implement without allocations |
| 30 | lines := string(output) |
| 31 | |
| 32 | scanner := bufio.NewScanner(strings.NewReader(lines)) |
| 33 | |
| 34 | var name, mtu, group string |
| 35 | var ips []string |
| 36 | |
| 37 | for scanner.Scan() { |
| 38 | line := scanner.Text() |
| 39 | |
| 40 | // If line contains ": flags", it's a line with interface information |
| 41 | if strings.Contains(line, ": flags") { |
| 42 | parts := strings.Fields(line) |
| 43 | if len(parts) < 4 { |
| 44 | return nil, fmt.Errorf("failed to parse line: %s", line) |
| 45 | } |
| 46 | name = strings.TrimSuffix(parts[0], ":") |
| 47 | if strings.Contains(line, "mtu") { |
| 48 | mtuIndex := 0 |
| 49 | for i, part := range parts { |
| 50 | if part == "mtu" { |
| 51 | mtuIndex = i |
| 52 | break |
| 53 | } |
| 54 | } |
| 55 | mtu = parts[mtuIndex+1] |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | // If line contains "groups:", it's a line with interface group |
| 60 | if strings.Contains(line, "groups:") { |
| 61 | parts := strings.Fields(line) |
| 62 | if len(parts) < 2 { |
| 63 | return nil, fmt.Errorf("failed to parse line: %s", line) |
| 64 | } |
| 65 | group = parts[1] |
| 66 | } |
| 67 | |
| 68 | // If line contains "inet ", it's a line with IP address |
| 69 | if strings.Contains(line, "inet ") { |
| 70 | parts := strings.Fields(line) |
| 71 | if len(parts) < 2 { |
| 72 | return nil, fmt.Errorf("failed to parse line: %s", line) |
| 73 | } |
| 74 | ips = append(ips, parts[1]) |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | if name == "" { |
| 79 | return nil, fmt.Errorf("interface name not found in ifconfig output") |
| 80 | } |
| 81 | |
| 82 | mtuInt, err := strconv.Atoi(mtu) |
| 83 | if err != nil { |
| 84 | return nil, fmt.Errorf("failed to parse MTU: %w", err) |
| 85 | } |