基于vc实现的网络监听功能程序实例（基于vc实现的网络监听功能程序实例）

本文所述VC++网络监听器代码，可以实现监听网络连接所使用的协议、源IP地址、目标IP地址等信息的功能，并且能把数据内容绑定到网格控件中显示。具体功能代码部分如下所示：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 //线程函数 UINT ThreadFun( LPVOID pParam ) { CSniffAppDlg* pDlg = static_cast<CSniffAppDlg*>(pParam); MSG msg; char buffer[1000],sourceip[32] ,*tempbuf; char *ptemp; BYTE* pData = NULL; //实际数据报中的数据 UINT sourceport ; CString str; HEADIP* pHeadIP; HEADICMP* pHeadICMP; HEADUDP* pHeadUDP; HEADTCP* pHeadTCP; in_addr addr; int ret; while (TRUE) { pData = NULL; if (PeekMessage(&msg,pDlg->m_hWnd,WM_CLOSE,WM_CLOSE,PM_NOREMOVE )) { closesocket(pDlg->m_Sock); break; } memset(buffer,0,1000); ret = recv(pDlg->m_Sock,buffer,1000,0); if (ret == SOCKET_ERROR) { continue; } else //接收到数据 { tempbuf = buffer; pHeadIP = (HEADIP*)tempbuf; //获取数据报总长度 WORD len = ntohs(pHeadIP->totallen); //获取源IP pDlg->m_List.InsertItem(pDlg->m_List.GetItemCount(),""); addr.S_un.S_addr = pHeadIP->sourceIP; ptemp = inet_ntoa(addr); pDlg->m_List.SetItemText(pDlg->m_List.GetItemCount()-1,1,ptemp); //获取目的IP addr.S_un.S_addr = pHeadIP->destIP; ptemp = inet_ntoa(addr); pDlg->m_List.SetItemText(pDlg->m_List.GetItemCount()-1,2,ptemp); //获取协议名称 ptemp = get_protoname(pHeadIP->proto); strcpy(sourceip,ptemp); pDlg->m_List.SetItemText(pDlg->m_List.GetItemCount()-1,0,sourceip); //获取IP数据报总长度 WORD ipSumLen = ntohs(pHeadIP->totallen); //IP数据报头总长度 int ipHeadLen = 20; //获得去除IP层数据的长度 WORD netlen = ipSumLen - ipHeadLen; //根据不同大协议获得不同协议的数据 switch (pHeadIP->proto) { case IPPROTO_ICMP: { pHeadICMP = (HEADICMP*)(tempbuf+20); pData = (BYTE*)(pHeadICMP)+4; //ICMP数据报头共4个字节 //获取数据的长度 netlen -= 4; break; } case IPPROTO_UDP: { pHeadUDP = (HEADUDP*)(tempbuf+20); pData = (BYTE*)pHeadUDP+8; //UDP数据报头共8个字节 sourceport = ntohs(pHeadUDP->SourcePort); str.Format("%d",sourceport); //设置源端口 pDlg->m_List.SetItemText(pDlg->m_List.GetItemCount()-1,3,str); str.Empty(); netlen -= 8; break; } case IPPROTO_TCP: { pHeadTCP = (HEADTCP*)(tempbuf+20); sourceport = ntohs(pHeadTCP->SourcePort); pData = (BYTE*)pHeadTCP+20; //TCP数据报头共20个字节 str.Format("%d",sourceport); //设置源端口 pDlg->m_List.SetItemText(pDlg->m_List.GetItemCount()-1,3,str); str.Empty(); netlen-= 20; break; } } //设置数据大小 str.Format("%d",netlen); pDlg->m_List.SetItemText(pDlg->m_List.GetItemCount()-1,4,str); str.Empty(); //设置数据 if (pData != NULL) { str.Format(" %s",pData); pDlg->m_List.SetItemText(pDlg->m_List.GetItemCount()-1,5,str); } str.Empty(); } } return 0; } void CSniffAppDlg::OnBeginlisten() { //创建套接字 m_Sock = socket(AF_INET,SOCK_RAW, IPPROTO_IP ); char name[128]; memset(name,0,128); hostent* phostent; phostent = gethostbyname(name); DWORD ip; ip = inet_addr(inet_ntoa(*(in_addr*)phostent->h_addr_list[0])); int timeout = 4000; //超时4秒 //设置接收数据的超时时间 setsockopt(m_Sock,SOL_SOCKET,SO_RCVTIMEO,(const char*)&timeout,sizeof(timeout)); sockaddr_in skaddr; skaddr.sin_family = AF_INET; skaddr.sin_port = htons(700); skaddr.sin_addr.S_un.S_addr = ip; //绑定地址 if ( bind(m_Sock,(sockaddr*)&skaddr,sizeof(skaddr))==SOCKET_ERROR) { MessageBox("地址绑定错误"); return; } DWORD inBuffer=1; DWORD outBuffer[10]; DWORD reValue = 0; if (WSAIoctl(m_Sock,SIO_RCVALL,&inBuffer,sizeof(inBuffer),&outBuffer,sizeof(outBuffer),&reValue,NULL,NULL)==SOCKET_ERROR) { MessageBox("设置缓冲区错误."); closesocket(m_Sock); return; } else m_pThread = AfxBeginThread(ThreadFun,(void*)this); } void CSniffAppDlg::OnCancel() { if (m_pThread) { //m_pThread->ExitInstance(); delete m_pThread; } closesocket( m_Sock) ; CDialog::OnCancel(); }