VC Ping IP class

Pingip. cpp

# Include "stdafx. H "# include" Ping. h "void cping: Ping (uint nretries, maid, hwnd) {socket rawsocket; lphostent lphost; uint nloop; int nret; struct sockaddr_in sadest; struct sockaddr_in sasrc; DWORD dwtimesent; DWORD dwelapsed; u_char cttl; m_hwnd = hwnd; cstring STR; // create a raw socket rawsocket = socket (af_inet, sock_raw, ipproto_icmp); If (rawsocket = socket_error) {cstring strmsg; strmsg. format ("An error occurred while creating a socket Error-wsaerror: % LD ", wsagetlasterror (); // send the error message sendmessage (m_hwnd, wm_msg_status, 0, (lparam) allocbuffer (strmsg); return ;} // obtain the host information lphost = gethostbyname (pstrhost); // construct the target socket address information sadest. sin_addr.s_addr = * (u_long far *) (lphost-> h_addr); sadest. sin_family = af_inet; sadest. sin_port = 70; // pingfor (nloop = 0; nloop <nretries; nloop ++) {// send the ICMP Response Request sendechorequest (rawsocket, & sadest); nret = waitforechorepl Y (rawsocket); If (! Nret) {Str. format ("request timed out"); sendmessage (m_hwnd, wm_msg_status, 3, (lparam) allocbuffer (STR);} else {// get response dwtimesent = recvechoreply (rawsocket, & sasrc, & cttl); // calculation time: dwelapsed = gettickcount ()-dwtimesent; Str. format ("reply from: % s: bytes = % d time = % ldms TTL = % d", inet_ntoa (sasrc. sin_addr), req_datasize, dwelapsed, cttl); sendmessage (m_hwnd, wm_msg_status, 2, (lparam) allocbuffer (STR); sleep (1000);} nret = Closesocket (rawsocket); If (nret = socket_error) {cstring strmsg; strmsg. format ("socket disabling error-wsaerror: % lD", wsagetlasterror (); // send an error message sendmessage (m_hwnd, wm_msg_status, 0, (lparam) allocbuffer (strmsg) ;}// sends an icmpecho packet request int cping: sendechorequest (socket S, lpsockaddr_in lpsttoaddr) {static echorequest echo; static nid = 1; static nseq = 1; int nret; // construct Response Request echo. icmphdr. type = 8; echo. icmphdr. code = 0; echo. Icmphdr. checksum = 0; echo. icmphdr. id = NID ++; echo. icmphdr. SEQ = nseq ++; For (nret = 0; nret <req_datasize; nret ++) echo. CDATA [nret] = ''+ nret; // Save the sending time ECHO. dwtime = gettickcount (); echo. icmphdr. checksum = in_cksum (u_short *) & Echo, sizeof (echorequest); // send the request nret = sendto (S, (lpstr) & Echo, sizeof (echorequest), 0, (lpsockaddr) lpsttoaddr, sizeof (sockaddr_in); If (nret = socket_error) {cstring strmsg; strmsg. format (" An error occurred while sending data-wsaerror: % LD ", wsagetlasterror (); // send an error message sendmessage (m_hwnd, wm_msg_status, 0, (lparam) allocbuffer (strmsg ));} return (nret);} // receives the icmpecho packet response DWORD cping: recvechoreply (socket S, lpsockaddr_in lpsafrom, u_char * pttl) {ECHOREPLY; int nret; int naddrlen = sizeof (struct sockaddr_in); // receives the request response nret = recvfrom (S, (lpstr) & ECHOREPLY, sizeof (ECHOREPLY), 0, (lpsockaddr) lpsafrom, & naddrlen); // check the returned value I F (nret = socket_error) {cstring strmsg; strmsg. format ("An error occurred while receiving data-wsaerror: % lD", wsagetlasterror (); // send an error message sendmessage (m_hwnd, wm_msg_status, 0, (lparam) allocbuffer (strmsg);} // returns the sending time * pttl = ECHOREPLY. iPhone dr. TTL; Return (ECHOREPLY. echorequest. dwtime) ;}// wait for response int cping: waitforechoreply (socket s) {struct timeval time; fd_set FDS; FDS. fd_count = 1; FDS. fd_array [0] = s; time. TV _sec = 1; time. TV _usec = 0; retur N (select (1, & FDS, null, null, & time) ;}// conversion address u_short cping: in_cksum (u_short * ADDR, int Len) {register int nleft = Len; register u_short * n = ADDR; register u_short answer; register int sum = 0; while (nleft> 1) {sum + = * n ++; nleft-= 2;} If (nleft = 1) {u_shortu = 0; * (u_char *) (& U) = * (u_char *) N; sum + = u;} sum = (sum> 16) + (sum & 0 xFFFF); sum + = (sum> 16); answer = ~ SUM; Return (answer);} Char * cping: allocbuffer (cstring strmsg) {int nlen = strmsg. getlength (); char * pbuffer = new char [nlen + 1]; strcpy (pbuffer, (const char *) strmsg); Assert (pbuffer! = NULL); Return pbuffer ;}

Pingip. h

// Ping. h // # define REQ_DATASIZE 32 // the size of the Echo request data class CPing {public: static char * AllocBuffer (CString strMsg); HWND m_hWnd; // window handle void Ping (UINT nRetries, LPCSTR pstrHost, HWND hWnd); int WaitForEchoReply (SOCKET s); // The intSendEchoRequest (SOCKET, LPSOCKADDR_IN) function of ICMP response ); DWORD sequence (SOCKET, LPSOCKADDR_IN, u_char * pTTL); u_short in_cksum (u_short * addr, int len); protected :}; typedef struct IP_HDR {u_char VIHL; // Version and sequence; // Type Of ServiceshortTotLen; // The total length Of shortID; // the flag Of lifecycle flagoff; // mark u_charTTL; // The Life Cycle u_charProtocol; // protocol u_1_checksum; // check and structin_addr iaSrc; // source address structin_addr iaDst; // Destination Address} IPHDR, * PIPHDR; typedef struct IC_MPHDR {u_charType; // type u_charCode; // encode u_1_checksum; // check and u_shortID; // identifies u_shortSeq; // sequential charData; // data} ICMPHDR, * PICMPHDR; typedef struct records {ICMPHDR icmpHdr; DWORDdwTime; charcData [REQ_DATASIZE];} ECHOREQUEST, * average; typedef struct ICMPECHOREPLY {IPHDRiphdr; ECHOREQUESTechorequest; char cFiller [256];} ECHOREPLY, * PECHOREPLY;