Support IPv6.plen=None in defragment6

secdev · Jan 24, 2024 · 6c901ba · 6c901ba
1 parent 8798cef
commit 6c901ba
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/scapy/layers/inet6.py b/scapy/layers/inet6.py
@@ -1139,7 +1139,9 @@ def defragment6(packets):
         offset = 8 * q.offset
         if offset != len(fragmentable):
             warning("Expected an offset of %d. Found %d. Padding with XXXX" % (len(fragmentable), offset))  # noqa: E501
-        frag_data_len = p[IPv6].plen - frag_hdr_len
+        frag_data_len = p[IPv6].plen
+        if frag_data_len is not None:
+            frag_data_len -= frag_hdr_len
         fragmentable += b"X" * (offset - len(fragmentable))
         fragmentable += raw(q.payload)[:frag_data_len]