| fahad.anwar |
07-24-2012 01:14 AM |
Client Server program in C
Hi all
I am trying to run a client server program. I have one problem. When I am closing the client connection then the server connection should also close. Instead its going into an infinite loop. Help would be appreciated. Below is the server code :
Code:
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <pthread.h>
#define PORT 9000
#define ARRAY_SIZE 5
struct client_handler
{
unsigned int status;
int client_sock;
pthread_t thread_id;
};
void* send_recv(void* arg)
{
struct client_handler *sock = (struct client_handler *)arg;
char buffer[100];
int bytes_read,bytes_sent;
while(1)
{
printf ("TCP server waiting for receive the data from client\n");
bytes_read = recv(sock->client_sock, buffer, sizeof(buffer), 0);
if(bytes_read <=0)
{
close(sock->client_sock);
sock->status = 0x1;
break;
}
buffer[bytes_read] = '\0';
printf("Server Received Data:%s\n", buffer);
bytes_sent = send(sock->client_sock, buffer, bytes_read, 0);
if(bytes_sent < 0)
{
close(sock->client_sock);
sock->status = 0x0;
break;
}
printf ("TCP server sent the received data to client\n");
}
pthread_kill();
}
int main(void)
{
int server_sock, client_sock, t, len,remote_len;
struct sockaddr_in local, remote;
struct client_handler client_thread[ARRAY_SIZE];
if((server_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("server socket creation failed");
exit(1);
}
memset(&local, 0, sizeof(local));
local.sin_family = AF_INET;
local.sin_addr.s_addr = INADDR_ANY;
local.sin_port = htons(PORT);
if(bind(server_sock, (struct sockaddr *)&local, sizeof(struct sockaddr)) == -1)
{
perror("bind Error");
exit(1);
}
if(listen(server_sock,5) == -1)
{
perror("listen Error");
exit(1);
}
while(1)
{
printf ("waiting for a new connection\n");
remote_len = sizeof(remote);
if((client_sock = accept(server_sock, (struct sockaddr*)&remote, &remote_len)) == -1)
{
perror("accept");
exit(1);
printf("Client Connected\n");
for(t=0; t < ARRAY_SIZE; t++)
{
if(client_thread[t].status == 0x0)
{
client_thread[t].status = 0x1;
client_thread[t].client_sock = client_sock;
pthread_create (&client_thread[t].thread_id,NULL,&send_recv,(void*)&client_thread[t]);
printf ("New client thread created, Thread ID:%d\n",client_thread[t].thread_id);
break;
}
}
}
return 0;
}
}
following is the client code :
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
int main(void)
{
int s, t, len;
struct sockaddr_in remote;
char str[100];
if((s = socket(AF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket");
exit(1);
}
printf("Trying to Connect.....");
memset(&remote, 0, sizeof(remote));
remote.sin_family = AF_INET;
remote.sin_addr.s_addr = INADDR_ANY;
remote.sin_port = htons(9000);
if(connect(s, (struct sockaddr *) &remote, sizeof(struct sockaddr)) == -1)
{
perror("connect");
exit(1);
}
printf("connected");
while(printf(">"), fgets(str, 100, stdin), !feof(stdin))
{
if(send(s, str, strlen(str), 0) == -1)
{
perror("send");
exit(1);
}
if((t = recv(s, str, 100, 0)) > 0)
{
str[t] = '\0';
printf("Echo > %s", str);
}
else
{
if(t < 0)
perror("recv");
else
printf("Server Closed Connection");
exit(1);
}
}
close(s);
return 0;
}
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