Hi All,
I am trying to send data from client to server. And getting data back to client. But I am facing following issue.
1. I am unable to display client message in server side.
2. I am unable to get back message from server.
Also I am not getting any error message while compiling the code. I think the issue is with some coding missing in my client-server code. But I am unable to find it. Please help me if you find anything wrong in my code.
Here are my code's
Client Code
/*Code for Client*/
#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>
//char get_port_val(char din,char dclk);
//char get_port_val(char din,char dclk)
void main()
{
int sock, bytes_recieved;
char buf[100];
struct hostent *host;
struct sockaddr_in server_addr;
//Default hostname assignment
host = gethostbyname("127.0.0.1");
printf("Creating Client Socket\n");
//Creating socket for client
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Error while creating client Socket\n");
exit(1);
}
printf("Client Socket created successfully\n");
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(5000);
server_addr.sin_addr = *((struct in_addr *)host->h_addr);
bzero(&(server_addr.sin_zero),8);
printf("Connecting to server \n");
//Conneting to server
if (connect(sock, (struct sockaddr *)&server_addr,
sizeof(struct sockaddr)) == -1)
{
perror("Error while connecting to server");
exit(1);
}
printf("Conneted to server\n");
//Sending and receiving data to-from server
strcpy(buf,"Hello");
printf("Value of buf is %s \n",buf);
printf("Sending data to server from client \n");
send(sock,buf,strlen(buf),0);
printf("Data send to server successfully\n");
printf("Receiving data from server \n");
recv(sock,buf,strlen(buf),0);
printf("Received data from server suceessfully\n");
close(sock);
/*
while(1)
{
bytes_recieved=recv(sock,recv_data,1024,0);
recv_data[bytes_recieved] = '\0';
if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 0)
{
close(sock);
break;
}
else
printf("\nRecieved data = %s " , recv_data);
printf("\nSEND (q or Q to quit) : ");
gets(send_data);
if (strcmp(send_data , "q") != 0 && strcmp(send_data , "Q") != 0)
send(sock,send_data,strlen(send_data), 0);
else
{
send(sock,send_data,strlen(send_data), 0);
close(sock);
break;
}
} */
//return 0;
}
Server Code
/* Code for server */
#include <sys/types.h>
#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>
int main()
{
int sock, connected, bytes_recieved , true = 1;
char buf[1024];
struct sockaddr_in server_addr,client_addr;
int sin_size;
//Creating socket for server
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Error while creating server Socket\n");
exit(1);
}
printf("Server socket created successfully\n");
// if (setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&true,sizeof(int)) == -1) {
// perror("Setsockopt");
// exit(1);
// }
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(5000);
server_addr.sin_addr.s_addr = INADDR_ANY;
bzero(&(server_addr.sin_zero),8);
//bind socket
if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr))
== -1) {
perror("Unable to bind inside server socket\n");
exit(1);
}
printf("Bind Socket completed\n");
//Listning
if (listen(sock, 5) == -1) {
perror("Error while Listening from client\n");
exit(1);
}
while(1)
{
sin_size = sizeof(struct sockaddr_in);
printf("Establishing connection between client and server\n");
if(connected = accept(sock, ( struct sockaddr *)&client_addr,&sin_size)==-1)
{
perror("Error in server while accepting connection from client\n");
exit(1);
}
printf("Connection established\n");
printf("Receiving data from client\n");
recv(connected,buf,strlen(buf),0);
printf("Received data from client is %s \n",buf);
printf("Sending back data to client\n");
send(connected,buf,strlen(buf),0);
printf("Data send to client is %s \n",buf);
}
close(sock);
return 0;
//printf("\nTCPServer Waiting for client on port 5000");
//fflush(stdout);
/*
while(1)
{
sin_size = sizeof(struct sockaddr_in);
connected = accept(sock, (struct sockaddr *)&client_addr,&sin_size);
printf("\n I got a connection from (%s , %d)",
inet_ntoa(client_addr.sin_addr),ntohs(client_addr.sin_port));
while (1)
{
printf("\n SEND (q or Q to quit) : ");
gets(send_data);
if (strcmp(send_data , "q") == 0 || strcmp(send_data , "Q") == 0)
{
send(connected, send_data,strlen(send_data), 0);
close(connected);
break;
}
else
send(connected, send_data,strlen(send_data), 0);
bytes_recieved = recv(connected,recv_data,1024,0);
recv_data[bytes_recieved] = '\0';
if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 0)
{
close(connected);
break;
}
else
printf("\n RECIEVED DATA = %s " , recv_data);
fflush(stdout);
}
}
close(sock);
return 0;
*/
}