Hi Dirk, I tried out the few lines of code like you suggested. It works. However, what I don't understand is how it works, i.e., how the port parameter in the function is the port sending the reply. Could you plz. explain. Thank You.
Regards, Surya On Wed, 7 Dec 2016 11:43:59 +0100, Dirk Ziegelmeier wrote > Use one UDP PCB, bind it to IPADDR_ANY and port x. > > Use udp_sendto() to send to any IP/port combination. > http://www.nongnu.org/lwip/2_0_0/group__udp__raw.html > > You get the src address/port of any request in your receive callback: > > void my_udp_recv_fn (void *arg, struct udp_pcb > <http://www.nongnu.org/lwip/2_0_0/structudp__pcb.html> *pcb, struct pbuf > <http://www.nongnu.org/lwip/2_0_0/structpbuf.html> *p, const ip_addr_t > <http://www.nongnu.org/lwip/2_0_0/group__ipaddr.html#ga44f9ada14c65d17aecf802d82eb27 3c5> > *addr, u16_t port) > { > [create new pbuf with response] > udp_sendto(pcb, response_pbuf, addr, port); > [UTF-8?]â} > > [UTF-8?]âDirk > [UTF-8?]â Disclaimer: ---------- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. The sender does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. -- Open WebMail Project (http://openwebmail.org) _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
