i'm trying to use udp/ip core in my application. in this particular application i'm using udp core as fast link for downloading data into the external RAM, so the transmission is only from PC to FPGA. I don't need to transmit any thing from FPGA. For transmission from PC i'm using winsock (PC is running windows XP), the main packet sending logic is following:

char pkt[] = {11, 22, 33, 44, 55};

size_t pkt_length = sizeof(pkt)/sizeof(pkt[0]);

sockaddr_in dest;

sockaddr_in local;

WSAData data;

WSAStartup( MAKEWORD( 2, 2 ), &data );

local.sin_family = AF_INET;

local.sin_addr.s_addr = inet_addr( "192.168.0.12" );

local.sin_port = 8088; // choose any

dest.sin_family = AF_INET;

dest.sin_addr.s_addr = inet_addr( "192.168.0.11" );

dest.sin_port = htons( 8080 );

// create the socket

SOCKET s = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );

// bind to the local address

bind( s, (sockaddr *)&local, sizeof(local) );

// send the pkt

int ret = sendto( s, pkt, pkt_length, 0, (sockaddr *)&dest, sizeof(dest) );

In FPGA, the receiving logic simply checks the dst-ip address, picks the data from UDP datagram.

I also set the ARP cache as mentioned in paper:

arp -s 192.168.0.11  00-18-1D-27-12-98

However there is no transmission from PC at all, I checked this from Wireshark. When i use the same program to send packets to another PC, i don't have any issue (Wireshark show that packets were transmitted).

Please help!