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网口先用固定的IP启动，然后尝试使用下面的代码进行DHCP配置，每次运行后ifShow能看到设备ip地址等信息均发生了重配置，但是dhcpcParamsGet获取到的参数全部为0，请大家看看代码哪有问题？谢谢！

#include <vxWorks.h>
#include <taskLib.h>

#include <stdio.h>
#include <ifLib.h>
#include <dhcpcLib.h>

void * pLeaseCookie;
struct dhcp_param ParamList;

void dtmdhcpcEventHookRtn
(
int leaseEvent, /* new or expired parameters */
void * pCookie /* lease identifier from dhcpcInit() */
)
{
if (leaseEvent == DHCPC_LEASE_NEW)
{
dhcpcParamsGet(pCookie, &ParamList);
printf("ipaddr = %x \n",ParamList.yiaddr.s_addr);

}
}

int test()
{

struct ifnet *pIf;

STATUS result;

pIf = ifunit("motfcc0"); /* Access network device. */

/* Initialize lease variables for automatic configuration. */

pLeaseCookie = dhcpcInit (pIf, TRUE);
if (pLeaseCookie == NULL)
return(ERROR);

result = dhcpcEventHookAdd(pLeaseCookie,dtmdhcpcEventHookRtn);
if (result != OK)
return (ERROR);

result = dhcpcBind (pLeaseCookie, TRUE);
if (result != OK)
return (ERROR);

return OK;
}