static void cs_fake_client(struct s_client *client, char *usr, int32_t uniq, IN_ADDR_T ip)
{
/* Uniq = 1: only one connection per user
*
* Uniq = 2: set (new connected) user only to fake if source
* ip is different (e.g. for newcamd clients with
* different CAID's -> Ports)
*
* Uniq = 3: only one connection per user, but only the last
* login will survive (old mpcs behavior)
*
* Uniq = 4: set user only to fake if source ip is
* different, but only the last login will survive
*/
struct s_client *cl;
struct s_auth *account;
cs_writelock(&fakeuser_lock);
for (cl = first_client->next; cl; cl = cl->next)
{
account = cl->account;
if (cl != client && cl->typ == 'c' && !cl->dup && account && streq(account->usr, usr)
&& uniq < 5 && ((uniq % 2) || !IP_EQUAL(cl->ip, ip)))
{
char buf[20];
if (uniq == 3 || uniq == 4)
{
cl->dup = 1;
cl->aureader_list = NULL;
cs_strncpy(buf, cs_inet_ntoa(cl->ip), sizeof(buf));
cs_log("client(%8lX) duplicate user '%s' from %s (prev %s) set to fake (uniq=%d)",
(unsigned long)cl->thread, usr, cs_inet_ntoa(ip), buf, uniq);
if (cl->failban & BAN_DUPLICATE) {
cs_add_violation(cl, usr);
}
if (cfg.dropdups) {
cs_writeunlock(&fakeuser_lock);
cs_sleepms(100); // sleep a bit to prevent against saturation from fast reconnecting clients
kill_thread(cl);
cs_writelock(&fakeuser_lock);
}
} else {
client->dup = 1;
client->aureader_list = NULL;
cs_strncpy(buf, cs_inet_ntoa(ip), sizeof(buf));
cs_log("client(%8lX) duplicate user '%s' from %s (current %s) set to fake (uniq=%d)",
(unsigned long)pthread_self(), usr, cs_inet_ntoa(cl->ip), buf, uniq);
if (client->failban & BAN_DUPLICATE) {
cs_add_violation_by_ip(ip, get_module(client)->ptab->ports[client->port_idx].s_port, usr);
}
if (cfg.dropdups) {
cs_writeunlock(&fakeuser_lock); // we need to unlock here as cs_disconnect_client kills the current thread!
cs_sleepms(100); // sleep a bit to prevent against saturation from fast reconnecting clients
cs_disconnect_client(client);
cs_writelock(&fakeuser_lock);
}
break;
}
}
}
cs_writeunlock(&fakeuser_lock);
}
void cs_add_violation(struct s_client *cl, char *info)
{
struct s_module *module = get_module(cl);
cs_add_violation_by_ip(cl->ip, module->ptab.ports[cl->port_idx].s_port, info);
}
