sock = socket(PF_INET, SOCK_RAW, IPPROTO_TCP);
if(sock == INVALID_SOCKET) {
errorHandling("socket() error");
}
setsockopt(sock, IPPROTO_IP, IP_HDRINCL, (char *)&flag, sizeof(flag));
addr_len = sizeof(servAddr);
memset(&servAddr, 0x00, sizeof(servAddr));
while(1) {
memset(&servAddr, 0x00, sizeof(servAddr));