Hi all,
I am working on a project that transmits UDP packet to a remote IP and port. I need to receive a broadcast packet from a particular source port. Below is my current UDP initialization.
I am using LWIP stack for UDP communication. How should I initialize the UDP connection to receive a broadcast packet?
void UdpClientConnect()
{
err_t ErrVal;
NewUdp = udp_new(); // Creates new UDP control block.
ip_set_option(NewUdp, SOF_BROADCAST);
ip_addr_t MyIpAddr;
IP_ADDR4(&MyIpAddr, MODULE_IP_ADDR0, MODULE_IP_ADDR1, MODULE_IP_ADDR2, NodeID);
udp_bind(NewUdp, &MyIpAddr,1234); // Binds the UDP block to module's IP and Port.
//udp_bind(NewUdp, IP_ADDR_BROADCAST, 8800);
ip_addr_t DestIpAddr;
IP_ADDR4(&DestIpAddr, DEVICE_IP_ADDR0, DEVICE_IP_ADDR1, DEVICE_IP_ADDR2, DEVICE_IP_ADDR3); // Configure Destination IP and Port.
ErrVal = udp_connect(NewUdp, &DestIpAddr, OUTGOING_PORT_ADDR); // Connects the UDP block to the Destination, using Destination IP and Port.
if(ErrVal == ERR_OK)
{
udp_recv(NewUdp, udp_receive_callback, NULL); // Receive Callback function executes for the UDP block.
}
}
My default IP for the MCU is 192.168.0.3 and port is 1234.
