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[lwip-devel] [bug #52914] ip4_canforward() mcast packet error.


From: hanhui
Subject: [lwip-devel] [bug #52914] ip4_canforward() mcast packet error.
Date: Tue, 16 Jan 2018 09:32:10 -0500 (EST)
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

URL:
  <http://savannah.nongnu.org/bugs/?52914>

                 Summary: ip4_canforward() mcast packet error.
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: hanhui03
            Submitted on: Tue 16 Jan 2018 02:32:08 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: git head

    _______________________________________________________

Details:

ip4_canforward()
{
   ...
   if ((p->flags & PBUF_FLAG_LLMCAST) && !IP_MULTICAST(addr)) {
   should be:
   if ((p->flags & PBUF_FLAG_LLMCAST) || IP_MULTICAST(addr)) {
   ...
}

The unicast forwarding function does not allow forwarding multicast packets.
the multicast forwarding is done by the pim router.




    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/bugs/?52914>

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