View difference between Paste ID: TidL8pLy and tsV4g8AH

 /*
  * uclient.c
  *
  *  Created on: Mar 14, 2013
  *      Author: none
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #include <arpa/inet.h>
 #include <netinet/in.h>
 #include <errno.h>
 
 
 #define		PORT	3666
 
 void die(const char *type_error){
 	printf("Error \"%s\" in %s\n", strerror(errno), type_error);
 	exit(1);		//Remember: exit doesn't terminate current function but the entire program (closing and saving each file descriptor).
 }
 
 size_t	get_file_len(int fd){
 	size_t	len;
 
 	lseek(fd, 0, SEEK_SET);				//set at the beginning of your file
 	len = lseek(fd, 0, SEEK_END);	//lseek() returns number of byte measured
 	lseek(fd, 0, SEEK_SET);			//set again at the beginning of the file
 
 	return len;
 }
 
 int main (){
 
     //define most important socket memebers
 
 	int					server_fd;		//server file descriptor
 	struct sockaddr_in	server, client;
 	socklen_t			addr_size;		//
 
 	int		fd;							//your file descriptor
 	char	buff[64];
 	char	file_name[32];
 
 	size_t	file_len, size_to_send;
 
 	//CREATE SOCKET
 	if ( (server_fd = socket(PF_INET, SOCK_DGRAM, 0)) < 0){
 		die("socket()");
 	}
 	puts("socket()");
 
 	//INITIALIZE SERVER ADDRESS
 	server.sin_family		= AF_INET;
 	server.sin_port			= htons(PORT);
 	server.sin_addr.s_addr 	= INADDR_ANY;
 
 	puts("address initialized");
 
 	//BIND ADDRESS AND SOCKET FILE DESCRIPTOR
 	addr_size = sizeof(struct sockaddr);
 	if ( (bind(server_fd, (struct sockaddr*)&server, addr_size)) < 0){
 		die("bind()");
 	}
 	puts("bind()");
 
 	//RECV FROM CLIENT NAME OF THE FILE YOU WANT TO OPEN
 	if ( (recvfrom(server_fd, file_name, sizeof(file_name), 0, (struct sockaddr*)&client, &addr_size)) < 0){
 		die("recvfrom");
 	}
 	printf("Connected with %s at %d port\n", inet_ntoa(client.sin_addr), htons(client.sin_port));
 
 	//OPEN YOUR FILE (IF IT EXISTS) AND THEN CALCULATE IT'S LENGTH AND SEND IT
 	if ( (fd = open(file_name, O_RDONLY)) < 0){
 		die("open()");
 	}
 	puts("file opened");
 
 	//GET FILE LEN
 	file_len = get_file_len(fd);
 
 	//SEND FILE LENGTH
 	if ( (sendto(server_fd, &file_len, sizeof(file_len), 0, (struct sockaddr*)&client, addr_size)) <0 ){
 		die("sendto()");
 	}
 	puts("file length sent");
 
 	//NOW SEND YOUR FILE
 	//READ FROM YOUR FILE (fd) AND SAVE sizeof(buff) BYTES TO BUFF
 	read(fd, buff, sizeof(buff));
 	if ( (size_to_send = sendto(server_fd, buff, strlen(buff), 0, (struct sockaddr*)&client, addr_size)) <0 ){
 		die("sendto()");
 	}
-	file_len -= size_to_send;
+
 
 	//YOUR FILE SHOULD HAVE BEEN SENT SUCCESSFULLY
 
 	return EXIT_SUCCESS;
 }