/* Change WTP state machine */
void ac_dfa_change_state(struct ac_session_t* session, int state) {
struct capwap_list_item* search;
ASSERT(session != NULL);
if (state != session->state) {
#ifdef DEBUG
char sessionname[33];
capwap_sessionid_printf(&session->sessionid, sessionname);
capwap_logging_debug("Session AC %s change state from %s to %s", sessionname, capwap_dfa_getname(session->state), capwap_dfa_getname(state));
#endif
session->state = state;
/* Search into notify event */
search = session->notifyevent->first;
while (search != NULL) {
struct ac_session_notify_event_t* notify = (struct ac_session_notify_event_t*)search->item;
if ((notify->action == NOTIFY_ACTION_CHANGE_STATE) && (notify->session_state == state)) {
char buffer[4];
struct ac_soap_response* response;
/* */
response = ac_soap_updatebackendevent(session, notify->idevent, capwap_itoa(SOAP_EVENT_STATUS_COMPLETE, buffer));
if (response) {
ac_soapclient_free_response(response);
}
/* Remove notify event */
capwap_itemlist_free(capwap_itemlist_remove(session->notifyevent, search));
break;
}
search = search->next;
}
}
}
static int ac_session_action_execute(struct ac_session_t* session, struct ac_session_action* action) {
int result = AC_NO_ERROR;
switch (action->action) {
case AC_SESSION_ACTION_CLOSE: {
result = CAPWAP_ERROR_CLOSE;
break;
}
case AC_SESSION_ACTION_RESET_WTP: {
result = ac_session_action_resetwtp(session, (struct ac_notify_reset_t*)action->data);
break;
}
case AC_SESSION_ACTION_ADDWLAN: {
result = ac_session_action_addwlan(session, (struct ac_notify_addwlan_t*)action->data);
break;
}
case AC_SESSION_ACTION_RECV_KEEPALIVE: {
#ifdef DEBUG
{
char sessionname[33];
capwap_sessionid_printf(&session->sessionid, sessionname);
capwap_logging_debug("Receive Keep-Alive from %s", sessionname);
}
#endif
/* Send keep-alive response */
//ac_kmod_send_keepalive(&session->sessionid);
capwap_timeout_set(session->timeout, session->idtimerkeepalivedead, AC_MAX_DATA_KEEPALIVE_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
/* */
if (session->state == CAPWAP_DATA_CHECK_TO_RUN_STATE) {
struct ac_soap_response* response;
/* Capwap handshake complete, notify event to backend */
response = ac_soap_runningwtpsession(session, session->wtpid);
if (response) {
if (response->responsecode == HTTP_RESULT_OK) {
ac_dfa_change_state(session, CAPWAP_RUN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_MAX_ECHO_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
} else {
result = CAPWAP_ERROR_CLOSE;
}
ac_soapclient_free_response(response);
} else {
result = CAPWAP_ERROR_CLOSE;
}
}
break;
}
case AC_SESSION_ACTION_RECV_IEEE80211_MGMT_PACKET: {
result = ac_session_action_recv_ieee80211_mgmt_packet(session, (struct capwap_header*)action->data, action->length);
break;
}
case AC_SESSION_ACTION_NOTIFY_EVENT: {
struct capwap_list_item* item;
/* Copy event into queue */
item = capwap_itemlist_create(sizeof(struct ac_session_notify_event_t));
memcpy(item->item, action->data, sizeof(struct ac_session_notify_event_t));
capwap_itemlist_insert_after(session->notifyevent, NULL, item);
break;
}
case AC_SESSION_ACTION_STATION_CONFIGURATION_IEEE80211_ADD_STATION: {
result = ac_session_action_station_configuration_ieee8011_add_station(session, (struct ac_notify_station_configuration_ieee8011_add_station*)action->data);
break;
}
case AC_SESSION_ACTION_STATION_CONFIGURATION_IEEE80211_DELETE_STATION: {
result = ac_session_action_station_configuration_ieee8011_delete_station(session, (struct ac_notify_station_configuration_ieee8011_delete_station*)action->data);
break;
}
case AC_SESSION_ACTION_STATION_ROAMING: {
struct ac_station* station;
/* Delete station */
station = ac_stations_get_station(session, RADIOID_ANY, NULL, (uint8_t*)action->data);
if (station) {
ac_stations_delete_station(session, station);
}
break;
}
}
return result;
}
/* Release reference of session */
static void ac_session_destroy(struct ac_session_t* session) {
#ifdef DEBUG
char sessionname[33];
#endif
ASSERT(session != NULL);
#ifdef DEBUG
capwap_sessionid_printf(&session->sessionid, sessionname);
capwap_logging_debug("Release Session AC %s", sessionname);
#endif
/* Release last reference */
capwap_lock_enter(&session->sessionlock);
session->count--;
/* Terminate SOAP request pending */
if (session->soaprequest) {
ac_soapclient_shutdown_request(session->soaprequest);
}
/* Check if all reference is release */
while (session->count > 0) {
#ifdef DEBUG
capwap_logging_debug("Wait for release Session AC %s (count=%d)", sessionname, session->count);
#endif
/* */
capwap_event_reset(&session->changereference);
capwap_lock_exit(&session->sessionlock);
/* Wait */
capwap_event_wait(&session->changereference);
capwap_lock_enter(&session->sessionlock);
}
capwap_lock_exit(&session->sessionlock);
/* Close data channel */
ac_kmod_delete_datasession(&session->sessionid);
/* Free DTSL Control */
capwap_crypt_freesession(&session->dtls);
/* Free resource */
while (session->packets->count > 0) {
capwap_itemlist_free(capwap_itemlist_remove_head(session->packets));
}
/* Free WLANS */
ac_wlans_destroy(session);
/* */
capwap_event_destroy(&session->changereference);
capwap_event_destroy(&session->waitpacket);
capwap_lock_destroy(&session->sessionlock);
capwap_list_free(session->action);
capwap_list_free(session->packets);
/* Free fragments packet */
if (session->rxmngpacket) {
capwap_packet_rxmng_free(session->rxmngpacket);
}
capwap_list_free(session->requestfragmentpacket);
capwap_list_free(session->responsefragmentpacket);
capwap_list_free(session->notifyevent);
capwap_timeout_free(session->timeout);
/* Free DFA resource */
capwap_array_free(session->dfa.acipv4list.addresses);
capwap_array_free(session->dfa.acipv6list.addresses);
if (session->wtpid) {
capwap_free(session->wtpid);
}
/* Free item */
capwap_itemlist_free(session->itemlist);
}
void ac_dfa_state_join(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
unsigned short binding;
struct ac_soap_response* response;
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
struct capwap_sessionid_element* sessionid;
struct capwap_wtpboarddata_element* wtpboarddata;
struct capwap_resultcode_element resultcode = { .code = CAPWAP_RESULTCODE_FAILURE };
ASSERT(session != NULL);
ASSERT(packet != NULL);
/* Check binding */
binding = GET_WBID_HEADER(packet->rxmngpacket->header);
if (ac_valid_binding(binding)) {
if (packet->rxmngpacket->ctrlmsg.type == CAPWAP_JOIN_REQUEST) {
/* Get sessionid and verify unique id */
sessionid = (struct capwap_sessionid_element*)capwap_get_message_element_data(packet, CAPWAP_ELEMENT_SESSIONID);
if (!ac_has_sessionid(sessionid)) {
char* wtpid;
/* Checking macaddress for detect if WTP already connected */
wtpboarddata = (struct capwap_wtpboarddata_element*)capwap_get_message_element_data(packet, CAPWAP_ELEMENT_WTPBOARDDATA);
/* Get printable WTPID */
wtpid = ac_get_printable_wtpid(wtpboarddata);
if (wtpid && !ac_has_wtpid(wtpid)) {
/* Request authorization of Backend for complete join */
response = ac_soap_authorizewtpsession(session, wtpid);
if (response) {
resultcode.code = ac_dfa_state_join_check_authorizejoin(session, response);
ac_soapclient_free_response(response);
} else {
resultcode.code = CAPWAP_RESULTCODE_JOIN_FAILURE_UNKNOWN_SOURCE;
}
} else {
capwap_logging_info("WTP Id %s already used in another session", wtpid);
resultcode.code = CAPWAP_RESULTCODE_JOIN_FAILURE_UNKNOWN_SOURCE;
}
/* */
if (CAPWAP_RESULTCODE_OK(resultcode.code)) {
session->wtpid = wtpid;
memcpy(&session->sessionid, sessionid, sizeof(struct capwap_sessionid_element));
session->binding = binding;
} else if (wtpid) {
capwap_free(wtpid);
}
} else {
char sessionname[33];
capwap_sessionid_printf(sessionid, sessionname);
capwap_logging_info("Session Id %s already used in another session", sessionname);
resultcode.code = CAPWAP_RESULTCODE_JOIN_FAILURE_ID_ALREADY_IN_USE;
}
} else {
resultcode.code = CAPWAP_RESULTCODE_MSG_UNEXPECTED_INVALID_CURRENT_STATE;
}
} else {
resultcode.code = CAPWAP_RESULTCODE_JOIN_FAILURE_BINDING_NOT_SUPPORTED;
}
/* Create response */
capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, binding);
txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_JOIN_RESPONSE, packet->rxmngpacket->ctrlmsg.seq, session->mtu);
/* */
if (CAPWAP_RESULTCODE_OK(resultcode.code)) {
response = ac_dfa_state_join_parsing_request(session, packet);
if (response) {
resultcode.code = ac_dfa_state_join_create_response(session, packet, response, txmngpacket);
ac_soapclient_free_response(response);
}
}
/* Add always result code message element */
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_RESULTCODE, &resultcode);
/* Join response complete, get fragment packets */
ac_free_reference_last_response(session);
capwap_packet_txmng_get_fragment_packets(txmngpacket, session->responsefragmentpacket, session->fragmentid);
if (session->responsefragmentpacket->count > 1) {
session->fragmentid++;
}
/* Free packets manager */
capwap_packet_txmng_free(txmngpacket);
/* Save remote sequence number */
session->remotetype = packet->rxmngpacket->ctrlmsg.type;
session->remoteseqnumber = packet->rxmngpacket->ctrlmsg.seq;
/* Send Join response to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->responsefragmentpacket)) {
if (CAPWAP_RESULTCODE_OK(resultcode.code)) {
ac_dfa_change_state(session, CAPWAP_POSTJOIN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_JOIN_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
} else {
ac_session_teardown(session);
}
} else {
/* Error to send packets */
capwap_logging_debug("Warning: error to send join response packet");
ac_session_teardown(session);
}
}
