I am trying to send a file from the server to the client and code is running without any errors, but when the client is creating the file I am not getting the required data which is in the file that server is sending.
I looked up for some solutions on StackOverflow itself but couldn't solve my problem as I am new to socket programming can someone tell me where I am going wrong.please help me!!
here are the codes
server.c
// Server side C/C++ program to demonstrate Socket programming
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <netdb.h>
#include <sys/sendfile.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/stat.h>
//#define PORT 8080
int main(int argc, char const *argv[])
{
int fq;
struct sockaddr_in client,server;
struct hostent *h;
struct stat st;
int len = 0;
int PORT = strtol(argv[1], NULL, 10);
char *filename = strdup(argv[2]);
int server_fd, new_socket, valread;
struct sockaddr_in address;
int opt = 1;
int addrlen = sizeof(address);
char buffer[1024] = {0};
char *hello = "Hello from server";
if(argc != 3 ) { fprintf(stderr, "%s", "wrong command line arguments\n");
exit(1);
}
// Creating socket file descriptor
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0)
{
perror("socket failed");
exit(EXIT_FAILURE);
}
// Forcefully attaching socket to the port 8080
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT,
&opt, sizeof(opt)))
{
perror("setsockopt");
exit(EXIT_FAILURE);
}
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons( PORT );
// Forcefully attaching socket to the port 8080
if (bind(server_fd, (struct sockaddr *)&address,
sizeof(address))<0)
{
fprintf(stderr, "%s", "Bind Failed\n");
exit(2);
}
else { printf("BindDone: %s\n ", argv[1]);
}
if (listen(server_fd, 3) < 0)
{
perror("listen");
exit(EXIT_FAILURE);
}
else { printf("ListenDone: %s\n ", argv[1]);
}
if ((new_socket = accept(server_fd, (struct sockaddr *)&address,
(socklen_t*)&addrlen))<0)
{
perror("accept");
exit(EXIT_FAILURE);
}
///////////////////////////////////////////
fq = open(filename, O_RDONLY);
if( fq < 0 )
{
fprintf(stderr, "%s", "File error\n");
exit(3);
}
stat(filename,&st);
len = st.st_size;
if(sendfile(server_fd,fq,0,len) < 0)
{
perror("send error");
exit(1);
}
// close(sd);
valread = read( new_socket , buffer, 1024);
printf("%s\n",buffer );
send(new_socket , hello , strlen(hello) , 0 );
printf("Hello message sent\n");
printf("TransferDone: %s\n ", "bytes\n");
close(fq);
close(server_fd);
return 0;
}
client.c
// Client side C/C++ program to demonstrate Socket programming
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <arpa/inet.h>
#define PORT 8080
#define MAX_LEN 512
int main(int argc, char const *argv[])
{
struct sockaddr_in server;
struct sockaddr_in client;
int rn ;
struct sockaddr_in address;
int sock = 0, valread;
struct sockaddr_in serv_addr;
char *hello = "Hello from client";
char buffer[MAX_LEN] ;
FILE *fp;
int i;
char *filename = strdup(argv[2]);
if(argc != 3 ) { fprintf(stderr, "%s", "wrong command line arguments\n");
exit(1);
}
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
printf("\n Socket creation error \n");
return -1;
}
memset(&serv_addr, '0', sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(PORT);
// Convert IPv4 and IPv6 addresses from text to binary form
if(inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr)<=0)
{
printf("\nInvalid address/ Address not supported \n");
return -1;
}
if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
{
fprintf(stderr, "%s", "Server connection error\n");
exit(2);
}
///////////////////////
fp=fopen( filename, "ab");
if(fp == NULL)
{
fprintf(stderr, "%s", "file not readable\n");
exit(3);
}
////////////////////////
while(1)
{
rn=recv(sock,buffer,MAX_LEN,0);
if(rn < 0)
{
printf( "Can 't receive file!\n ");
exit(1);
}
buffer[rn]= '\0 ';
if(rn != 0)
{
fwrite(buffer,1,512,fp);
bzero(buffer,sizeof(buffer));
}
else
{
printf("receive over.\n");
break;
}
}
/////////////////////////
send(sock , hello , strlen(hello) , 0 );
printf("Hello message sent\n");
valread = read( sock , buffer, 1024);
printf("%s\n",buffer );
fclose(fp);
return 0;
}
