[lwip-devel] [bug #62032] Cannot have bind to INADDR_ANY on two different sockets bound to a specific netif

[Patrik Lantto]

URL:
  <https://savannah.nongnu.org/bugs/?62032>

                 Summary: Cannot have bind to INADDR_ANY on two different
sockets bound to a specific netif
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: patriklantto
            Submitted on: Fri 11 Feb 2022 03:25:48 PM UTC
                Category: None
                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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Details:

If two sockets are bound to different netifs (e.g. using SO_BINDTODEVICE),
bind will return an error (EADDRINUSE) if INADDR_ANY and the same port is
used. This should only be the case if any of the sockets are not bound to a
specific netif (or if they are bound to the same netif).

The attached patch will consider netif_idx in the loop validating the address
in tcp_bind, tcp_listen, tcp_connect and udp_bind.



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File Attachments:


-------------------------------------------------------
Date: Fri 11 Feb 2022 03:25:48 PM UTC  Name: SO_BINDTODEVICE.patch  Size: 3KiB
  By: patriklantto

<http://savannah.nongnu.org/bugs/download.php?file_id=52844>

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