UDP Header isn't sent

hi all,

I'm having problems with sending out my udp-header. When I use ethereal it claims that no header was sent out. I am using the LWIP stand alone webserver example to send out my udp messages

CODE

********************************************************************

/*

*

* This file is for testing stand-alone (NO_SYS) LWIP

* using a RAM-based simple file system

*

*/

# include "system.h"

# include "arch/init.h"# include "lwip/ip_addr.h"# include "lwip/tcpip.h"# include "lwip/udp.h"# include "lwip/netif.h"# include "netif/lan91c111if.h"# include "stdio.h"# include "stdlib.h"

# include "sys/alt_alarm.h"

/* ---------- IP oriented addresses for ethernet adapter ---------- */# define IPADDR0 169# define IPADDR1 254# define IPADDR2 0# define IPADDR3 2

# define NETMASK0 255# define NETMASK1 255# define NETMASK2 0# define NETMASK3 0

# define GWADDR0 10# define GWADDR1 1# define GWADDR2 1# define GWADDR3 11

int main(void)

{

//0.6.4 struct netif *netif;

struct netif netif;

struct ip_addr ipaddr, netmask, gw;

struct ip_addr udpDestIpAddr; //IP-address to send UDP packet to

struct pbuf* packetBuffer; //Pointer to a packet buffer

struct udp_pcb* udpSocket; //Create UDP-socket

struct udp_hdr* udpHeader; //Create UDP-header

u16_t localPort, destPort;

alt_avalon_lan91c111_if* dev_list_ptr = (alt_avalon_lan91c111_if*)alt_ethernet_device_list.next;

printf("Example web server using Light-weight IP (LWIP)\n");

printf("and simple RAM-based file system.\n\n");

packetBuffer = pbuf_alloc(PBUF_TRANSPORT,100,PBUF_RAM);

/*

* Initialize lwip

*/

lwip_init();

printf ("Setting IP address to: %d.%d.%d.%d\n", IPADDR0, IPADDR1, IPADDR2, IPADDR3);

printf ("Setting netmask to: %d.%d.%d.%d\n", NETMASK0, NETMASK1, NETMASK2, NETMASK3);

printf ("Setting gateway address to: %d.%d.%d.%d\n", GWADDR0, GWADDR1, GWADDR2, GWADDR3);

IP4_ADDR(&ipaddr, IPADDR0, IPADDR1, IPADDR2, IPADDR3);

IP4_ADDR(&netmask, NETMASK0, NETMASK1, NETMASK2, NETMASK3);

IP4_ADDR(&gw, GWADDR0, GWADDR1, GWADDR2, GWADDR3);

//0.6.4 netif = netif_add(&ipaddr, &netmask, &gw,

netif_add(&netif, &ipaddr, &netmask, &gw,

(void*)dev_list_ptr,

lan91c111if_init,

ip_input);

//0.6.4 netif_set_default(&netif);

netif_set_default(&netif);

IP4_ADDR(&udpDestIpAddr, 169, 254, 0, 1);

udpHeader->src = localPort;

udpHeader->dest = destPort;

udpSocket = udp_new();

udp_bind(udpSocket, IP_ADDR_ANY, localPort); //Bind socket to port

udp_connect(udpSocket, &udpDestIpAddr, destPort);

printf("Ready to send....\n");

while(1)

{

//0.6.4 lan91c111if_service(netif);

lan91c111if_service(&netif);

udp_send(udpSocket, packetBuffer);

printf("Send a package\n");

// printf("Local port is %d\n", udpHeader->dest);

}

}

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But for some reason, the UDP header isn't sent. Does anyone know what I'm doing wrong?!

Cheers,

Danny