//////////////////////////////Client
FILE *fh_in;
char Chunk[16];
long filesize;
long chunksize = 16;
long bytesread = 0;
int prozent = 0;
int groesse = 0;
int packet = 0;
char buffor;
fh_in = fopen( "E:\\INSTALL.LOG", "rb" );
fseek( fh_in, 0, SEEK_END );
filesize = ftell(fh_in);
fseek( fh_in, 0, SEEK_SET );

cout << "Datei Groesse: " << filesize << "\n";
groesse = filesize/chunksize;
cout << "Packete zu senden: \n" << groesse << "\n";
cout << "\nFortschtritt:\n";

while( fread( Chunk, chunksize, 1, fh_in ))
{
packet++;
prozent = 100 * packet / groesse;
printf("\b\b\b\b\b\b\b\b\b%d%%", prozent);
printf(" (%d)", packet);
bytesread += chunksize;
if( bytesread > filesize - chunksize )
chunksize = filesize - bytesread;
send(sock,Chunk,chunksize,0);
Sleep(100);
}
send(sock,"finished",strlen("finished"),0);
printf("Fertig\n");
fclose(fh_in);
goto sendlabel;

//////////////////////////////Server
FILE *fh_out;
char Chunk[16];
long filesize;
long chunksize = 16;
long bytesread = 0;
int prozent = 0;
int groesse = 0;
int packet = 0;
fh_out = fopen( "e:\\neu.log", "wb" );
cout << "Fange an!";

while(!( Chunk == "finished" ))
{
cout << "Mache grad\n";
recv_size = recv(client_socket, Chunk,chunksize ,0);
Chunk[recv_size]='\0';
if (!strcmp(Chunk, "finished")){goto uploadlabel;}
fwrite( Chunk, chunksize, 1, fh_out );
}
uploadlabel:
fclose(fh_out);
printf("Fertig\n");[cpp]

ich würde dir empfehlen(wenns nur auf windows laufen soll) TransferFile() (heissts glaub ich) zu verwenden das ist extrem viel schneller

und bitte bitte bitte lass die verdammten gotos weg und mit der chunksize machs doch so:

char Chunk[chunksize];

dass is ein bisschen dynamischer