使用TCP堆栈来Ping计算机

//原著：les jordan//翻译：重庆大学光电工程学院   贾旭滨//欢送大师品评指点，感谢！    以次的这个类是处置一个很普遍的题目的：在一台win95的计划机上如何样运用mstcp仓库去ping其余一台计划机。固然，这个类在nt3.51和nt4上也不妨用。明显，microsoft公司不会那么笨，在win体例中又其余结构这么一个独立的体制来处置这个题目，让从来就搀杂的win体例越发搀杂。那么，咱们只能用icmp dll本人来处置这个题目了。然而，很让人悲观，microsoft公司直到winsock 2.0也没有处置这个题目。    困难即是：给一个计划机的名字，大概一台计划机的ip地方，如何样去ping它，并且获得它的相应功夫。以是咱们用了icmp dll，而对于少许socket构造来说，在csocket中仍旧十足都有设置了。以是，底下的类是一个csocket的子类，它将会有更好的功效来处置更多的题目。然而你得先获得icmpapi.h，icmapi.cpp，icmp.lib和ipexport.h，ipexport.cpp那些文献，那些文献该当加在你的工程中。那些文献你不妨在microsoft developers network的光盘上获得，然而在微软公司的网页上也能拿到，并且革新。类中有4个大众因变量，如次：unsigned long resolveip(cstring strip)unsigned long resolvename(cstring strhostname)cstring getip(unsigned long ulip)dword pinghost(unsigned long ulip, int ipingtimeout)    resolveip(cstring strip)因变量运用一个ip地方的字符串来动作参数，归来值是ip地方值。    resolvename(cstring strhostname)因变量运用一计划机名的字符串来动作参数，过程dns大概wins的领会，归来值是被ping计划机的ip 地方，提防它运用了gethostbyname模块化。    getip(unsigned long ulip)因变量是以ip地方动作参数（提防是ip地方），归来值是一个表白ip地方的字符串。    pinghost(unsigned long ulip, int ipingtimeout)因变量，第1个参数是ip地方（提防是ip地方，而不是ip地方的字符串），第2个参数是表白功夫值的，表白间隙功夫的。因变量功效是，去ping一台计划机，归来值是ping的相应功夫。以次是代码：//*//-------------------------------------------------------------------------//-------------------------------------------------------------------------//icmpecho.h//-------------------------------------------------------------------------//------------------------------------------------------------------------//*class cicmpecho : public csocket{// attributespublic:// operationspublic:    cicmpecho();    virtual ~cicmpecho();    unsigned long resolveip(cstring strip);    unsigned long resolvename(cstring strhostname);    dword pinghost(unsigned long ulip, int ipingtimeout);    cstring getip(unsigned long ulip);// overridespublic:    // classwizard generated virtual function overrides    //{{afx_virtual(cicmpecho)    //}}afx_virtual    // generated message map functions    //{{afx_msg(cicmpecho)        // note - the classwizard will add and remove member functions here.    //}}afx_msg// implementationprotected:};///////////////////////////////////////////////////////////////////////////////*//------------------------------------------------------------------------------------------------------------------//icmpecho.cpp//------------------------------------------------------------------------------------------------------------------//*// icmpecho.cpp : implementation file//#include "icmpecho.h"extern "c" {#include "ipexport.h"#include "icmpapi.h"}#define ping_timeout 100#ifdef _debug#define new debug_new#undef this_filestatic char this_file[] = __file__;#endif/////////////////////////////////////////////////////////////////////////////// cicmpechocicmpecho::cicmpecho(){}cicmpecho::~cicmpecho(){}// do not edit the following lines, which are needed by classwizard.#if 0begin_message_map(cicmpecho, csocket)    //{{afx_msg_map(cicmpecho)    //}}afx_msg_mapend_message_map()#endif    // 0/////////////////////////////////////////////////////////////////////////////// cicmpecho member functionsunsigned long cicmpecho::resolveip(cstring strip){    //task 1:    given ip address i.e. "111.111.111.111",    //    return network byte ordered address (ulip)    unsigned long ulip;    ulip =(ipaddr)inet_addr(strip);    return ulip;}unsigned long cicmpecho::resolvename(cstring strhostname){    //task 1:    resolve hostname (through dns or wins, whichever appropriate)    //task 2:    return network byte ordered address (ulip)    unsigned long ulip;    hostent* phostent;    phostent = gethostbyname(strhostname);        if (phostent == null)        return 0;    ulip = *(dword*)(*phostent->h_addr_list);    return ulip;}dword cicmpecho::pinghost(unsigned long ulip, int ipingtimeout){    //task 1:    open icmp handle    //task 2:    create structure to receive ping reply    //task 3:    sendping (sendecho)    //task 4:    close icmp handle    //task 5:    return roundtriptime    unsigned long ip = ulip;    handle icmphandle = icmpcreatefile();    char reply[sizeof(icmp_echo_reply)+8];    icmp_echo_reply* iep=(icmp_echo_reply*)&reply;    iep->roundtriptime = 0xffffffff;    icmpsendecho(icmphandle,ip,0,0,null,reply,sizeof(icmp_echo_reply)+8,ipingtimeout);    icmpclosehandle(icmphandle);    return iep->roundtriptime;}cstring cicmpecho::getip(unsigned long ulip){    //task 1:    given a host order ulip address    //    return a ip address in format of xxx.xxx.xxx.xxx    lpstr szaddr;    struct in_addr inetaddr;        inetaddr.s_addr = (ipaddr)ulip;    szaddr = inet_ntoa(inetaddr);    cstring csip = szaddr;    return csip;}