[lwip-devel] [bug #64176] The DF flag of the IP header is not set, even if the IP packet is not fragmented.

[jiangheng]

URL:
  <https://savannah.nongnu.org/bugs/?64176>

                 Summary: The DF flag of the IP header is not set, even if the
IP packet is not fragmented.
                   Group: lwIP - A Lightweight TCP/IP stack
               Submitter: jinag12345
               Submitted: Wed 10 May 2023 01:45:09 PM UTC
                Category: IPv4
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.1.3


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Follow-up Comments:


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Date: Wed 10 May 2023 01:45:09 PM UTC By: jiangheng <jinag12345>
see RFC 6864:
   o Atomic datagrams: (DF==1)&&(MF==0)&&(frag_offset==0)

   o Non-atomic datagrams: (DF==0)||(MF==1)||(frag_offset>0)

DF flag is not set in LWIP even if ip packet is atomic datagrams, 







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