I wrote a simple client server socket program in C.
The program did worked I compiled
Code:
cc server.c -o server.o
cc client.c -o client.o
and executed
Code:
./server.o
./client.o
Things were running successfully.
After this I disconnected and again tried to run the client program this time I got error
Code:
ooprs: client1: Connection refused
here is the code server.c
Code:
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
int
main ()
{
int server_sockfd, client_sockfd;
int server_len, client_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
server_sockfd = socket (AF_INET, SOCK_STREAM, 0);
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = inet_addr ("127.0.0.1");
server_address.sin_port = 9734;
server_len = sizeof (server_address);
bind (server_sockfd, (struct sockaddr *) &server_address, server_len);
listen (server_sockfd, 5);
while (1)
{
char ch;
printf ("server waiting\n");
client_len = sizeof (client_address);
client_sockfd =
accept (server_sockfd, (struct sockaddr *) &client_address,
&client_len);
read (client_sockfd, &ch, 1);
ch++;
write (client_sockfd, &ch, 1);
close (client_sockfd);
}
}
and client.c
Code:
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
int
main ()
{
int sockfd;
int len;
int result;
struct sockaddr_in address;
char ch = 'A';
sockfd = socket (AF_INET, SOCK_STREAM, 0);
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr ("127.0.0.1");
address.sin_port = 9734;
len = sizeof (address);
result = connect (sockfd, (struct sockaddr *) &address, len);
if (result == -1)
{
perror ("ooprs: client1");
exit (1);
}
write (sockfd, &ch, 1);
read (sockfd, &ch, 1);
printf ("char from server = %c\n", ch);
close (sockfd);
exit (0);
}
