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POc send and receive file
 

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    <p>This is the server (sendfile) part:</p> <pre><code>offset = 0; for (size_to_send = fsize; size_to_send &gt; 0; ){ rc = sendfile(newsockd, fd, &amp;offset, size_to_send); if (rc &lt;= 0){ perror("sendfile"); onexit(newsockd, sockd, fd, 3); } offset += rc; size_to_send -= rc; } close(fd); /* la chiusura del file va qui altrimenti rischio loop infinito e scrittura all'interno del file */ memset(buffer, 0, sizeof(buffer)); strcpy(buffer, "226 File Successfully transfered\n"); if(send(newsockd, buffer, strlen(buffer), 0) &lt; 0){ perror("Errore durante l'invio 226"); onexit(newsockd, sockd, 0, 2); } memset(buffer, 0, sizeof(buffer)); </code></pre> <p>and this is the part of the client (recv file) part:</p> <pre><code> fsize_tmp = fsize; sInfo.filebuffer = malloc(fsize); if(sInfo.filebuffer == NULL){ perror("malloc"); onexit(sockd, 0, fd, 4); } while(((uint32_t)total_bytes_read != fsize) &amp;&amp; ((nread = read(sockd, sInfo.filebuffer, fsize_tmp)) &gt; 0)){ if(write(fd, sInfo.filebuffer, nread) != nread){ perror("write RETR"); onexit(sockd, 0, 0, 1); } total_bytes_read += nread; fsize_tmp -= nread; } close(fd); /* la chiusura del file va qui altrimenti client entra in loop infinito e si scrive all'interno del file */ memset(buffer, 0, sizeof(buffer)); if(recv(sockd, buffer, 34, 0) &lt; 0){ perror("Errore ricezione 226"); onexit(sockd, 0, 0, 1); } printf("%s", buffer); memset(buffer, 0, sizeof(buffer)); memset(dirpath, 0, sizeof(dirpath)); free(sInfo.filebuffer); </code></pre> <p>The problem is that the string <em>"226 File etc etc"</em> is written <strong>inside</strong> the file that has been sent.<br> I've tried to do a small debug and so i've added a <code>printf</code> after the for loop (server sendfile) and a <code>printf</code> after the while loop (client) and i've noticed that the file is sent but on the client it doesn't exit from the while because the <code>printf</code> isn't printed...<br> Why i got this strange behaviour??<br>br></p> <p><strong>EDIT:</strong><br> The server send the file size to the client whit this code:<br></p> <pre><code> fd = open(filename, O_RDONLY); if(fd &lt; 0){ error!! } if(fstat(fd, &amp;fileStat) &lt; 0){ perror("Errore fstat"); onexit(newsockd, sockd, fd, 3); } fsize = fileStat.st_size; if(send(newsockd, &amp;fsize, sizeof(fsize), 0) &lt; 0){ perror("Errore durante l'invio della grandezza del file\n"); onexit(newsockd, sockd, fd, 3); } </code></pre> <p>the client receives the fsize from the server with this code:<br></p> <pre><code>if(read(sockd, &amp;fsize, sizeof(fsize)) &lt; 0){ perror("Errore durante ricezione grandezza file\n"); onexit(sockd, 0 ,0 ,1); } fd = open(sInfo.filename, O_CREAT | O_WRONLY, 0644); if (fd &lt; 0) { perror("open"); onexit(sockd, 0 ,0 ,1); } fsize_tmp = fsize; </code></pre> <p>both <code>fsize</code> are declared as <code>uint32_t</code>...</p>
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