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#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include<unistd.h>
#include<errno.h>
#include<err.h>
int main(int argc, char *argv[])
{
int socket_desc, new_socket, c;
struct sockaddr_in server, client;
// char *message;
socket_desc = socket(AF_INET, SOCK_STREAM, 0);
if (socket_desc == -1) {
err(1, "Cannot create socket");
}
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons(1234);
if (bind(socket_desc, (struct sockaddr *)&server, sizeof(server)) < 0) {
err(1, "Cannot bind");
}
listen(socket_desc, 3);
for (;;) {
c = sizeof(struct sockaddr_in);
new_socket =
accept(socket_desc, (struct sockaddr *)&client,
(socklen_t *) & c);
if (new_socket < 0) {
return 3;
}
// int client_port = ntohs(client.sin_port);
char *client_ip = inet_ntoa(client.sin_addr);
for (int i = 0; i < 100; ++i) {
if (client_ip[i] == 0)
break;
printf("%c", client_ip[i]);
}
printf("\n");
write(new_socket, client_ip, strlen(client_ip));
write(new_socket, "\n", 1);
}
return 0;
}
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