Re: [lwip-users] setting up multiple UDP connections with same prio and different data to send

[Noam Weissman]

Hi,

How about simple old broadcast ?

Use one port for all, say 10000.

You do not need several tasks. If you want to simplify things use one task with 
on socket for receive.
And another task with another socket for sending.

As you do not need to connect (UDP), simply change remote_ip_addr before 
sending if you want 
To send to a single end. If you want to send to all do a broadcast.
       
BR,
Noam.

-----Original Message-----
From: lwip-users [mailto:address@hidden On Behalf Of mgirke
Sent: Wednesday, November 09, 2016 11:10 AM
To: address@hidden
Subject: Re: [lwip-users] setting up multiple UDP connections with same prio 
and different data to send

Yes I know UDP ist connectionless.

In the first place I wanted to use Multicast but since my WLAN module doesn´t 
support Multicast I need to find another way.

What I am simplified doing is:

conn = netconn_new(NETCONN_UDP);

netconn_bind(conn, NULL, 10001);

netconn_sendto(conn, buf, &remote_ip_addr, 10001);

I can send data to multiple clients using multiple xtasks all using different 
ports (10001++). But in that way I am wasting bandwidth of my module since it 
is sending the same data X times instead of only once to multiple remote IP 
addresses.

Any idea to avoid that?

Thanks!



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