Flow Speed Meter

Thanks to forget because of you, I will not fall into the trap, I will forget the people, once the feelings, despite the things, not afraid to forget, afraid to remember something should not be remembered. Life is always such a water time. #include <stdio.h> #include <ctime> #include  <winsock2.h> #pragma  comment (lib, "ws2_32. Lib ") #define  icmp_echo 8#define packdatasize 1000ushort checksum (USHORT* buff, Int size) { unsigned long cksum=0; // while (size>1)  {  cksum+=* Buff++;  size -=sizeof (USHORT);  } // if (size)  {  cksum+=* (UCHAR*) Buff; } // cksum= (cksum >> 16) + (CKSUM&NBSP;&AMP;&NBSP;0XFFFF);  cksum+= ( CKSUM&NBSP;&GT;&GT;&NBSP;16); return  (USHORT) (~cksum);} Bool settimeout (SOCKET&NBSP;S,&NBSP;INT&NBSP;NTIME,&NBSP;BOOL&NBSP;BRECV) { int ret =  :: setsockopt (s, sol_socket,   brecv ? so_rcvtimeo : so_sndtimeo,  (char*) &ntime, sizeof (ntime));  return ret != socket_error;} typedef struct _ipheader  // 20 bytes of IP header {    uchar      iphverlen;      //  version number and head length (4 bits each)     UCHAR      ipTOS;          //  Service Type       USHORT    ipLength;       //  Total packet length, that is, the length of the entire IP report     ushort    ipid;     //   Packet identification, the unique identity of each number sent by the report     USHORT    ipFlags;        //  logo     UCHAR     ipTTL;        //  time to Live is ttl    uchar      ipprotocol;     //  protocol, possibly TCP, UDP, ICMP, etc.     USHORT     ipchecksum;     //  Checksum     ULONG     ipSource;        //  Source IP Address     ULONG      ipdestination;  //  Destination IP Address} ipheader, *pipheader;typedef struct icmp_hdr{     unsigned char   icmp_type;  //  Message Types      unsigned char   icmp_code;  //  Code      unsigned short  icmp_checksum; //  checksum  //  Below is the echo header      The ID number used by unsigned short  icmp_id;  //  to uniquely identify this request, usually set to process id     unsigned short  icmp_sequence; //  Serial Number     unsigned long    icmp_timestamp; //  timestamp} icmp_hdr, *picmp_hdr;//thread function declaration dword winapi  ThreadProc (Lpvoid param); Int&nbsP;main () { wsadata wsadata;   if  ( wsastartup ( MAKEWORD ( 2, 2 ),  &wsadata)   { /* start  winsock*/  printf (  Fail to start  up winsock.\n  ");   return -1;  }   //  Destination IP address, which is the IP address to ping  char szDestIp[] =  "119.75.217.109";  // 127.0.0.1 //   Create original  socket sraw = ::socket (AF_INET,&NBSP;SOCK_RAW,&NBSP;IPPROTO_ICMP);  //   Set the Receive timeout  settimeout (sraw, 1000, true); //  set the destination address  SOCKADDR_IN dest;  dest.sin_family = af_inet; dest.sin_port = htons (0);  dest.sin_addr. S_un. S_ADDR&NBSP;=&NBSP;INET_ADDR (Szdestip); //  Creating an ICMP packet  char buff[sizeof (ICMP_HDR)  +  1000]; ICMP_HDR* pIcmp =  (icmp_hdr*) buff; //  filling in ICMP packet data  pIcmp-> icmp_type = 8; // Request an ICMP echo  pIcmp->icmp_code = 0; pIcmp->icmp_id =  (USHORT):: GetCurrentProcessId (); picmp->icmp_checksum = 0; picmp->icmp_sequence = 0;  //  Fill Data section, can send 1KB byte data for any  memset (&buff[sizeof (ICMP_HDR)],  ' E ',  1000);   //  start sending and receiving ICMP packets  ushort nseq = 0; /////////measurement time send time is 15s/////////////  Clock_t start=clock ();  ////////Create thread Accept//////// handle handle=createthread (NULL,NULL, ThreadProc, (LPVOID) &sraw,0,null);  ::closehandle (handle);  ///////////////////////////////////////  static int ncount = 0; while (TRUE)  {   int nret;  //if (ncount++ == 4)   if (Clock ()-start>15000)//15 seconds after exiting    break;  picmp->icmp_checksum = 0;  picmp->icmp_timestamp  = ::gettickcount ();   picmp->icmp_sequence = nseq++;  //send 1KB bytes of data   picmp->icmp_checksum =  checksum ((ushort*) buff, sizeof (ICMP_HDR)  + 1000);   nret = ::sendto ( Sraw, buff, sizeof (ICMP_HDR)  + 1000, 0,  (sockaddr *) &dest, sizeof ( dest)   if (nret == socket_error)   {   printf (" sendto ()  failed: %d \n ",  ::wsagetlasterror ());   return -1;  }   ncount++;  //socket if it is not possible to send and receive data messages at the same time, pause sending, meaning   //sleep (+);  } sleep (20000 );  //test Result: The system sends 11MB data traffic  printf ("%d\n", ncount) within 15S;     ::wsacleanup ();  return 0;} Dword winapi threadproc (Lpvoid param) { clock_t start=clock (); int nRet;  int ncount=0;  //socketparam param=* ((socketparam*) pparam);  SOCKET sock=* ( (socket*) PA sockaddr_in from; int nlen=sizeof (from),  //allows the packet to arrive at the server side smoothly, then accepts the server-side message  : : Sleep (+),  while (Clock ()-start<10000)  {  char recvbuf[1400];  nret  = ::recvfrom (sock, recvbuf, 1400, 0,  (sockaddr*) &from, &nLen);   if (Nret == socket_error)   {   if (:: WSAGetLastError ()  ==  wsaetimedout)    {    printf (" timed out\n");     continue;   }   printf (" recvfrom ()  failed: %d\n",  ::wsagetlasterror ());   return -1;  }  //  start parsing the received ICMP packets below   int ntick = ::gettickcount ();   if (nret < sizeof (IPHeader)  + sizeof (ICMP_HDR))   {   printf (" too few bytes from  %s \n ",  ::inet_nToa (FROM.SIN_ADDR));  }  //  the received data contains the IP header, the IP header size is 20 bytes, so add 20 to get the ICMP header   icmp_hdr * precvicmp =  (icmp_hdr*) (recvbuf + 20); //  (ICMP_HDR*) (recvBuf +  sizeof (Ipheader))   if (precvicmp->icmp_type != 0)  //  echo   {    printf (" nonecho type %d recvd \n",  precvicmp->icmp_type);    return -1;  }  if (precvicmp->icmp_id != :: GetCurrentProcessId ())   {   printf (" someone else ' s packet! \n");    return -1;  }  ncount++; //compute the network speed, the packet size is 1k //calculation formula: ncount (number)/10 (s);  //ncount=ncount/10; //printf ("%d\n", ncount);   printf (" %d bytes  from %s: ",  nret, inet_ntoa (FROM.SIN_ADDR));   printf ("  icmp_seq =  %d.  ",  precvicmp->icmp_sequence);   printf (" time: %d ms",  ntick - precvicmp->icmp_ timestamp);   printf (" \n");   ::sleep (+);  }  return 0;}

Flow Speed Meter