#ifdef ARP_GLOBALS
#define ARP_EXT
#else
#define ARP_EXT extern 
#endif

ARP_EXT void Arp_Request(unsigned long ip_address);
ARP_EXT void Arp_Answer();
ARP_EXT void Gateway_Arp_Request();                    //在每分鐘的前三秒對網(wǎng)關(guān)地址進(jìn)行解析  
ARP_EXT void Arp_Process();