int main(int argc, char **argv)
{
int sock, incoming_sock;
int optval;
struct sockaddr_in addr, incoming_addr;
unsigned int incoming_addr_len;
/* create socket */
sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock < 0) err("socket()");
/* set reusable flag */
optval = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
/* prepare inet address */
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(SRV_PORT);
addr.sin_addr.s_addr = htonl(INADDR_ANY); /* listen on all interfaces */
if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) err("bind");
if (listen(sock, 10) < 0) err("listen");
for(;;)
{
incoming_addr_len = sizeof(incoming_addr);
incoming_sock = accept(sock, (struct sockaddr*)&incoming_addr,
&incoming_addr_len);
if (incoming_sock < 0)
{
close(sock);
err("accept");
}
printf("connection from %s:%i\n",
inet_ntoa(incoming_addr.sin_addr),
ntohs(incoming_addr.sin_port)
);
if (fork() == 0)
{
send_greetings(incoming_sock);
close(incoming_sock);
break;
}
}
return 0;
}
/* -------------------initiate ftp server-------------------
*/
int run_ftp(int port)
{
memset(&listen_conn, 0, sizeof(connection));
listen_conn.saddr.sin_port = htons(port);
if (create_listen_socket(&listen_conn) < 0) {
printlog("%s","create_listen_socket FAILED\n");
exit(1);
}
for (;;) {
if (accept_connection( &listen_conn, &sconn) < 0) {
printlog("%s","accept_connection FAILED\n");
continue;
}
signal(SIGCHLD, SIG_IGN);
if (fork() == 0) {
close_conn(listen_conn);
status = CONNECTED;
send_greetings();
command_loop();
close_conn(sconn);
return 0;
}
close_conn(sconn);
}
return 0;
}
