[lwip-devel] [patch #7773] "netconn_bind" broken for UDP connections in LwIP 1.4.0

[Simon Goldschmidt]

Update of patch #7773 (project lwip):

                  Status:            Works For Me => Invalid                
             Open/Closed:                    Open => Closed                 

    _______________________________________________________

Follow-up Comment #5:

Well, if netconn_bind() returns and error, ou simply get the behaviour you
would have had without calling it, i.e. you just get the next free port as
local port.

netconn_bind() returning "Address in use" means you have another udp pcb using
the same local IP address and port. This is not allowed, but before 1.4.0, we
didn't check for duplicate ports (that code was marked with "todo").

However, you can reuse local ports if you want, but you have to set SO_REUSE
to 1 in lwipopts.h and set the SOF_REUSEADDR flag on *all* udp pcbs using the
same port: 

for 1.4.1:
ip_set_option(your_pcb, SOF_REUSEADDR);

or for 1.4.0:
your_pcb->so_options |= SOF_REUSEADDR;

    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/patch/?7773>

_______________________________________________
  Nachricht gesendet von/durch Savannah
  http://savannah.nongnu.org/