[lwip-devel] [bug #55987] lwip_recvmsg does not return sender's address/port

[Ross Tyler]

URL:
  <https://savannah.nongnu.org/bugs/?55987>

                 Summary: lwip_recvmsg does not return sender's address/port
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: rossetyler
            Submitted on: Sat 23 Mar 2019 04:43:21 PM UTC
                Category: UDP
                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: 2.0.3

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Details:

When using asio async_receive_from, in the esp-idf (v3.2-beta3), the sender's
endpoint is not filled in because lwip_recvmsg ignores the
msghdr->msg_name{,len} it is given. Although this information is available in
lwip_recvfrom, it does not return it because lwip_recvmsg gives it NULL.

The same boost::asio code works fine on Linux.




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