\u4e00\u822c\u6211\u4eec\u5224\u65ad\u662f\u5426\u80fd\u591f\u8bbf\u95ee\u6307\u5b9a\u7684IP\u5730\u5740\u65f6\uff0c\u4e00\u822c\u90fd\u662f\u91c7\u7528PING\u6216\u8005\u5c1d\u8bd5\u8fde\u63a5\u5230\u6307\u5b9a\u7684TCP\u7aef\u53e3\u7684\u65b9\u5f0f\uff0c\u5728\u4e0a\u9762\u7684\u57fa\u7840\u4e0a\uff0c\u5b9e\u9645\u4e0a\u901a\u8fc7\u5c3d\u5feb\u7684\u6392\u9664\u660e\u663e\u4e0d\u53ef\u80fd\u8bbf\u95ee\u7684\u76ee\u6807\uff0c\u6765\u52a0\u5feb\u6d4b\u8bd5\u7684\u901f\u5ea6\u3002<\/p>\n
\u4e0b\u9762\u7684C++\u4ee3\u7801\u63d0\u4f9b\u7ed9\u5927\u5bb6\uff0c\u65b9\u4fbf\u7684\u5224\u65ad\u662f\u5426\u80fd\u591f\u8def\u7531\u5230\u6307\u5b9a\u7684\u76ee\u6807\uff1a<\/p>\n
\/*\u5224\u65ad\u662f\u5426\u80fd\u591f\u8def\u7531\u5230\u6307\u5b9a\u7684IP\r\nParameters\r\n ARemote : \u7528\u6765\u786e\u5b9a\u7f51\u5361\u7684\u8fdc\u7a0b\u5730\u5740\r\nReturns\r\n \u5728\u4ee5\u4e0b\u60c5\u51b5\u4e0b\uff0c\u8fd4\u56defalse:\r\n 1.\u65e0\u6cd5\u8def\u7531\u5230\u8fdc\u7a0b\u5730\u5740\uff1b\r\n\u3000 2.\u7f51\u5361\u88ab\u7981\u7528\u6216\u7f51\u5361\u65ad\u5f00\u8fde\u63a5\r\n\u3000 \u5426\u5219\uff0c\u8fd4\u56detrue\r\n*\/\r\nbool __fastcall CanRouteTo(const in_addr &ARemote)\r\n {\r\n MIB_IFTABLE *ATable;\r\n DWORD ASize=0;\r\n int ARetVal=0;\/\/Unknown\r\n if(GetIfTable(NULL,&ASize,false)==ERROR_INSUFFICIENT_BUFFER)\r\n {\r\n ATable=(MIB_IFTABLE *)malloc(ASize);\r\n PMIB_IPFORWARDTABLE pIpForwardTable=NULL;\r\n try\r\n {\r\n if(GetIfTable(ATable,&ASize,false)==ERROR_SUCCESS)\r\n {\r\n ASize=0;\r\n int ALastMatric;\r\n if(GetIpForwardTable(pIpForwardTable, &ASize, false)==ERROR_INSUFFICIENT_BUFFER)\r\n {\r\n pIpForwardTable = (PMIB_IPFORWARDTABLE)malloc(ASize);\r\n if(GetIpForwardTable(pIpForwardTable, &ASize, false)==ERROR_SUCCESS)\r\n {\r\n for(int j=0; (j<pIpForwardTable->dwNumEntries)&&(ARetVal==0); j++)\r\n {\r\n if((pIpForwardTable->table[j].dwForwardMask&ARemote.S_un.S_addr)==pIpForwardTable->table[j].dwForwardDest)\r\n {\r\n if(pIpForwardTable->table[j].dwForwardType>=3)\r\n {\r\n for(DWORD i=0; i<ATable->dwNumEntries; i++)\r\n {\r\n if(pIpForwardTable->table[j].dwForwardIfIndex==ATable->table[i].dwIndex)\r\n {\r\n switch(ATable->table[i].dwOperStatus)\r\n {\r\n case MIB_IF_OPER_STATUS_OPERATIONAL:\r\n case MIB_IF_OPER_STATUS_CONNECTED:\r\n ARetVal=1;\/\/Connected\r\n break;\r\n default:\r\n ARetVal=2;\/\/Disconnected\r\n break;\r\n }\r\n break;\r\n }\r\n }\r\n }\r\n }\r\n }\r\n }\r\n }\r\n }\r\n }\r\n __finally\r\n {\r\n free(ATable);\r\n if(pIpForwardTable)\r\n free(pIpForwardTable);\r\n }\r\n }\r\n return (ARetVal==1);\r\n }<\/pre>\n\u8fd9\u4e2a\u51fd\u6570\u7684\u7f3a\u9677\u662f\u6bcf\u6b21\u662f\u6bcf\u6b21\u90fd\u4f1a\u679a\u4e3e\u8def\u7531\u8868\u548c\u7f51\u5361\u72b6\u6001\uff0c\u5b9e\u9645\u4e0a\u8fdb\u4e00\u6b65\u4f18\u5316\u7684\u8bdd\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u7f13\u5b58\u8def\u7531\u8868\u6765\u63d0\u9ad8\u6548\u7387\u3002\u8fd9\u65f6\u4f60\u53ef\u80fd\u6709\u65b0\u7684\u7591\u95ee\uff1f\u8def\u7531\u8868\u53d8\u4e86\u600e\u4e48\u529e\uff1fIP\u5730\u5740\u53d8\u4e86\u600e\u4e48\u529e\uff1f\u7f51\u5361\u65ad\u5f00\u6216\u8005\u88ab\u7981\u7528\u4e86\u6211\u600e\u4e48\u68c0\u6d4b\u5230\u5462\uff1f<\/p>\n
\u597d\u5427\uff0c\u6211\u4eec\u627f\u8ba4\u8fd9\u4e9b\u90fd\u662f\u5408\u7406\u62c5\u5fe7\uff0c\u6240\u4ee5\u6211\u8fd9\u91cc\u544a\u8bc9\u5927\u5bb6\u4e24\u4e2aAPI\uff0cNotifyRouteChange\u548cNotifyAddrChange\u53ef\u4ee5\u5206\u522b\u7528\u4e8e\u68c0\u6d4b\u8def\u7531\u8868\u548c\u5730\u5740\u7684\u53d8\u66f4\u3002\u60a8\u53ef\u80fd\u8ba4\u4e3a\u6ca1\u6709\u7f51\u5361\u68c0\u6d4b\u529f\u80fd\uff0c\u5b9e\u9645\u4e0a\uff0c\u7f51\u5361\u88ab\u7981\u7528\u6216\u624d\u542f\u7528\u65f6\uff0c\u8def\u7531\u8868\u4f1a\u53d1\u751f\u53d8\u66f4\uff0c\u6240\u4ee5\u53ef\u4ee5\u6ee1\u8db3\u4e0a\u9762\u7684\u8981\u6c42\u4e86\u3002\u53ea\u9700\u8981\u5728\u68c0\u6d4b\u5230\u8def\u7531\u8868\u548cIP\u53d8\u66f4\u65f6\uff0c\u66f4\u65b0\u4e0b\u8def\u7531\u8868\u5c31OK\u4e86\u3002<\/p>\n
\u540c\u6837\u7684\uff0c\u5927\u5bb6\u770b\u5b9e\u73b0\u7684\u4ee3\u7801\uff0c\u53ef\u4ee5\u770b\u5230\u4ee3\u7801\u4e2d\u5df2\u7ecf\u5b9e\u9645\u5305\u542b\u4e86\u7f51\u5361\u662f\u5426\u65ad\u5f00\u7684\u68c0\u6d4b\uff0c\u53ef\u4ee5\u63d0\u53d6\u51fa\u6765\uff0c\u5224\u65ad\u7f51\u5361\u662f\u5426\u4e0b\u7ebf\u3002\u5c31\u4e0d\u5728\u8fd9\u91cc\u91cd\u590d\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u822c\u6211\u4eec\u5224\u65ad\u662f\u5426\u80fd\u591f\u8bbf\u95ee\u6307\u5b9a\u7684IP\u5730\u5740\u65f6 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[69,51],"tags":[24,100,99],"class_list":["post-860","post","type-post","status-publish","format-standard","hentry","category-c-builder","category-qsocket","tag-24","tag-100","tag-99"],"views":5046,"_links":{"self":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/860","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=860"}],"version-history":[{"count":1,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/860\/revisions"}],"predecessor-version":[{"id":861,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=\/wp\/v2\/posts\/860\/revisions\/861"}],"wp:attachment":[{"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=860"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=860"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.qdac.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}