int
pptpd_assign_call(pptpd *_this, pptp_call *call)
{
int shuffle_cnt = 0, call_id;
shuffle_cnt = 0;
slist_itr_first(&_this->call_free_list);
while (slist_length(&_this->call_free_list) > 1 &&
slist_itr_has_next(&_this->call_free_list)) {
call_id = (int)slist_itr_next(&_this->call_free_list);
if (call_id == 0)
break;
slist_itr_remove(&_this->call_free_list);
if (call_id == PPTPD_SHUFFLE_MARK) {
if (shuffle_cnt++ > 0)
break;
slist_shuffle(&_this->call_free_list);
slist_add(&_this->call_free_list,
(void *)PPTPD_SHUFFLE_MARK);
slist_itr_first(&_this->call_free_list);
continue;
}
call->id = call_id;
hash_insert(_this->call_id_map, CALL_MAP_KEY(call), call);
return 0;
}
errno = EBUSY;
pptpd_log(_this, LOG_ERR, "call request reached limit=%d",
PPTP_MAX_CALL);
return -1;
}
/** assign the call to the l2tpd */
int
l2tpd_assign_call(l2tpd *_this, l2tp_call *call)
{
int shuffle_cnt;
u_int session_id;
shuffle_cnt = 0;
do {
session_id = (uintptr_t)slist_remove_first(
&_this->free_session_id_list);
if (session_id != L2TP_SESSION_ID_SHUFFLE_MARK)
break;
L2TPD_ASSERT(shuffle_cnt == 0);
if (shuffle_cnt++ > 0) {
l2tpd_log(_this, LOG_ERR,
"unexpected errror in %s(): free_session_id_list "
"full", __func__);
slist_add(&_this->free_session_id_list,
(void *)L2TP_SESSION_ID_SHUFFLE_MARK);
return 1;
}
slist_shuffle(&_this->free_session_id_list);
slist_add(&_this->free_session_id_list,
(void *)L2TP_SESSION_ID_SHUFFLE_MARK);
} while (1);
call->id = session_id;
return 0;
}