#include <stdio.
h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <arpa/inet.h>
int main() {
int server_socket, client_socket;
struct sockaddr_in server_addr, client_addr;
socklen_t addr_size;
char buffer[1024];
server_socket = socket(AF_INET, SOCK_STREAM, 0);
if (server_socket < 0) {
printf("Error in socket creation.\n");
return -1;
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(12345);
server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)) <
0) {
printf("Binding failed.\n");
return -1;
}
if (listen(server_socket, 1) < 0) {
printf("Error in listening.\n");
return -1;
}
addr_size = sizeof(client_addr);
client_socket = accept(server_socket, (struct sockaddr*)&client_addr,
&addr_size);
if (client_socket < 0) {
printf("Error in accepting connection.\n");
return -1;
}
while (1) {
memset(buffer, 0, sizeof(buffer));
int bytes_received = recv(client_socket, buffer, sizeof(buffer), 0);
if (bytes_received <= 0) {
printf("Connection closed by client.\n");
break;
}
printf("Client: %s\n", buffer);
printf("Server: ");
fgets(buffer, sizeof(buffer), stdin);
send(client_socket, buffer, strlen(buffer), 0);
}
close(client_socket);
close(server_socket);
return 0;
}
