| Dave Wallace | cf9356d | 2024-07-23 01:28:19 -0400 | [diff] [blame] | 1 | diff --git a/scapy/contrib/cdp.py b/scapy/contrib/cdp.py |
| 2 | index a1532b78..83963ff4 100644 | ||||
| 3 | --- a/scapy/contrib/cdp.py | ||||
| 4 | +++ b/scapy/contrib/cdp.py | ||||
| 5 | @@ -392,7 +392,7 @@ class _CDPChecksum: | ||||
| 6 | This padding is only used for checksum computation. The original | ||||
| 7 | packet should not be altered.""" | ||||
| 8 | if len(pkt) % 2: | ||||
| 9 | - last_chr = orb(pkt[-1]) | ||||
| 10 | + last_chr = orb(pkt[len(pkt)-1:]) | ||||
| 11 | if last_chr <= 0x80: | ||||
| 12 | return pkt[:-1] + b'\x00' + chb(last_chr) | ||||
| 13 | else: | ||||
| 14 | |||||