PA6488 Developer's Guide - Known Bugs     Function include Must include corresponding include files when calling a function. For example, calling sprintf() without include stdio.h will not have compiler error, but will cause unpredictable results.     32-bit boundary data in struct When a struct mapped into a memory buffer, UINT in the struct will be wrong if it is over the 32-bit boundary. Found in arp.c typedef struct _ARP_FORMAT { USHORT sHardwareType; /* hardware type */ USHORT sProtocolType; /* protocol type */ UCHAR cHardwareLen; /* hardware address length */ UCHAR cProtocolLen; /* protocol address length */ USHORT sOperation; /* T_ARP_FORMAT operation (see AR_XXXX list above) */ UCHAR pcSHA[HW_ALEN]; /* sender's physical hardware address */ UCHAR pcSPA[IP_ALEN]; /* sender's protocol address (IP addr.) */ UCHAR pcTHA[HW_ALEN]; /* target's physical hardware address */ UCHAR pcTPA[IP_ALEN]; /* target's protocol address (IP) */ } T_ARP_FORMAT; if chang to typedef struct _ARP_FORMAT { USHORT sHardwareType; /* hardware type */ USHORT sProtocolType; /* protocol type */ UCHAR cHardwareLen; /* hardware address length */ UCHAR cProtocolLen; /* protocol address length */ USHORT sOperation; /* T_ARP_FORMAT operation (see AR_XXXX list above) */ UCHAR pcSHA[HW_ALEN]; /* sender's physical hardware address */ UINT iSPA; /* sender's protocol address (IP addr.) */ UCHAR pcTHA[HW_ALEN]; /* target's physical hardware address */ UINT iTPA; /* target's protocol address (IP) */ } T_ARP_FORMAT; iSPA value is wrong, while iTPA is correct.