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telnet.c
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telnet.c
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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
// for socket API
#include <sys/socket.h>
// for sockaddr_in
#include <netinet/in.h>
// for true
#include <stdbool.h>
// for close()
#include <unistd.h>
#define PORT 3000
int create_socket()
{
int sock = 0;
if ((sock = socket(PF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Failed to create socket");
exit(EXIT_FAILURE);
}
return sock;
}
int wait_connection(int server_socket)
{
}
int main()
{
struct sockaddr_in client_name;
socklen_t client_name_size = sizeof(client_name);
struct sockaddr_in server_name;
int client_socket = 0;
int server_socket = create_socket();
char buf[50];
ssize_t recv_len = 0;
server_name.sin_family = AF_INET,
server_name.sin_port = htons(PORT);
server_name.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(server_socket, (struct sockaddr *)&server_name, sizeof(server_name)) < 0)
{
perror("Failed to bind an address to server socket");
exit(EXIT_FAILURE);
}
if (listen(server_socket, 1) < 0)
{
perror("Failed to listen");
exit(EXIT_FAILURE);
}
client_socket = accept(server_socket, (struct sockaddr *)&client_name, &client_name_size);
if (client_socket < 0)
{
perror("Faild to accpet connection");
exit(EXIT_FAILURE);
}
while (true)
{
recv_len = recv(client_socket, buf, 10, 0);
if (recv_len <= 0)
{
close(client_socket);
close(server_socket);
if (recv_len == 0)
{
exit(EXIT_SUCCESS);
}
else
{
perror("Failed to recv");
exit(EXIT_FAILURE);
}
}
fwrite(buf, recv_len, 1, stdout);
}
return 0;
}