I'm doing some work with LWIP 2.0.2 using the raw API to send and receive UDP datagrams and I have a doubt regarding the thread safety of udp_send and udp_recv. Right now I have a single UDP PCB instance and I'm handling incoming datagrams in one thread using the recv callback (I assume this thread is the tcpip_thread) and sending UDP datagrams in another thread. Is this safe or should I queue my UDP transmissions using the tcpip_callback_with_block ?
Kind regards,
Ricardo Martins