ping检测网络通断.rar

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <conio.h> // #include <tcp.h> #include <dos.h> #include "rtos.h" #include "net.h" char isPingSucc(DWORD dwServerIp) { longword timer, new_rcvd; longword sent = 0L; int Status; //dwServerIp = 0xc0a80001; outp(0xfe20,0x2101); delay(100); Status = inp(0xfe24); Status = Status & 0x0024; if(Status == 0x0) return 0; sent = 0x55; if (_ping(dwServerIp ,sent,250,0,NULL)) return 0; delay(100); tcp_tick(NULL); new_rcvd = 0x0; if ((timer = _chk_ping( dwServerIp , &new_rcvd)) != 0xffffffffL) { if(new_rcvd == sent) { return 1; } } return 0; }