2013-05-01 14:52:55 +02:00
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#include "ac.h"
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#include "capwap_dfa.h"
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#include "capwap_array.h"
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#include "ac_session.h"
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/* */
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2013-05-27 21:33:23 +02:00
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static int receive_echo_request(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
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2013-09-16 22:11:32 +02:00
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int validsession = 0;
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struct ac_soap_response* response;
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2013-05-27 21:33:23 +02:00
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struct capwap_header_data capwapheader;
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struct capwap_packet_txmng* txmngpacket;
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2013-05-01 14:52:55 +02:00
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2013-09-16 22:11:32 +02:00
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/* Check session */
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response = ac_soap_checkwtpsession(session, session->wtpid);
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if (response) {
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if ((response->responsecode == HTTP_RESULT_OK) && response->xmlResponseReturn) {
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xmlChar* xmlResult = xmlNodeGetContent(response->xmlResponseReturn);
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2013-11-07 22:05:33 +01:00
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if (xmlResult) {
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if (!xmlStrcmp(xmlResult, (const xmlChar *)"true")) {
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validsession = 1;
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}
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xmlFree(xmlResult);
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2013-09-16 22:11:32 +02:00
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}
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}
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ac_soapclient_free_response(response);
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}
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if (!validsession) {
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return -1;
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}
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2013-05-27 21:33:23 +02:00
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/* Create response */
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capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, GET_WBID_HEADER(packet->rxmngpacket->header));
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txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_ECHO_RESPONSE, packet->rxmngpacket->ctrlmsg.seq, session->mtu);
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2013-05-01 14:52:55 +02:00
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2013-05-27 21:33:23 +02:00
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/* Add message element */
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2013-08-21 23:00:54 +02:00
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/* CAPWAP_ELEMENT_VENDORPAYLOAD */ /* TODO */
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2013-05-01 14:52:55 +02:00
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2013-05-27 21:33:23 +02:00
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/* Echo response complete, get fragment packets */
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ac_free_reference_last_response(session);
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capwap_packet_txmng_get_fragment_packets(txmngpacket, session->responsefragmentpacket, session->fragmentid);
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if (session->responsefragmentpacket->count > 1) {
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session->fragmentid++;
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}
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2013-05-01 14:52:55 +02:00
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2013-05-27 21:33:23 +02:00
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/* Free packets manager */
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capwap_packet_txmng_free(txmngpacket);
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2013-05-01 14:52:55 +02:00
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2013-05-27 21:33:23 +02:00
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/* Save remote sequence number */
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session->remoteseqnumber = packet->rxmngpacket->ctrlmsg.seq;
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capwap_get_packet_digest(packet->rxmngpacket, packet->connection, session->lastrecvpackethash);
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2013-05-01 14:52:55 +02:00
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2013-05-27 21:33:23 +02:00
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/* Send Configure response to WTP */
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2013-11-20 23:12:00 +01:00
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if (!capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], session->responsefragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr)) {
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2013-05-27 21:33:23 +02:00
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/* Response is already created and saved. When receive a re-request, DFA autoresponse */
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capwap_logging_debug("Warning: error to send echo response packet");
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2013-05-01 14:52:55 +02:00
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}
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return 0;
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}
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2013-12-04 22:25:16 +01:00
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/* */
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static void receive_ieee80211_wlan_configuration_response(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
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struct capwap_resultcode_element* resultcode;
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/* Check the success of the Request */
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resultcode = (struct capwap_resultcode_element*)capwap_get_message_element_data(packet, CAPWAP_ELEMENT_RESULTCODE);
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if (resultcode && !CAPWAP_RESULTCODE_OK(resultcode->code)) {
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capwap_logging_warning("Receive IEEE802.11 WLAN Configuration Response with error: %d", (int)resultcode->code);
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}
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/* */
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ac_free_reference_last_request(session);
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}
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2013-05-27 21:33:23 +02:00
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/* */
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2013-11-05 17:54:29 +01:00
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void ac_dfa_state_run(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
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2013-05-01 14:52:55 +02:00
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ASSERT(session != NULL);
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if (packet) {
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2013-11-20 23:12:00 +01:00
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if (capwap_is_request_type(packet->rxmngpacket->ctrlmsg.type) || ((session->localseqnumber - 1) == packet->rxmngpacket->ctrlmsg.seq)) {
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switch (packet->rxmngpacket->ctrlmsg.type) {
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case CAPWAP_CONFIGURATION_UPDATE_RESPONSE: {
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/* TODO */
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2013-12-04 22:25:16 +01:00
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/* */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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}
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2013-08-13 17:53:04 +02:00
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2013-11-20 23:12:00 +01:00
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case CAPWAP_CHANGE_STATE_EVENT_REQUEST: {
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/* TODO */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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}
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2013-08-13 17:53:04 +02:00
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2013-11-20 23:12:00 +01:00
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case CAPWAP_ECHO_REQUEST: {
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if (!receive_echo_request(session, packet)) {
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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} else {
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ac_session_teardown(session);
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2013-05-27 21:33:23 +02:00
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}
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2013-08-13 17:53:04 +02:00
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2013-11-20 23:12:00 +01:00
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break;
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}
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2013-08-13 17:53:04 +02:00
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2013-11-20 23:12:00 +01:00
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case CAPWAP_CLEAR_CONFIGURATION_RESPONSE: {
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/* TODO */
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2013-12-04 22:25:16 +01:00
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/* */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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}
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2013-08-13 17:53:04 +02:00
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2013-11-20 23:12:00 +01:00
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case CAPWAP_WTP_EVENT_REQUEST: {
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/* TODO */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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}
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2013-08-13 17:53:04 +02:00
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2013-11-20 23:12:00 +01:00
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case CAPWAP_DATA_TRANSFER_REQUEST: {
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/* TODO */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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}
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2013-10-20 17:33:57 +02:00
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2013-11-20 23:12:00 +01:00
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case CAPWAP_DATA_TRANSFER_RESPONSE: {
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/* TODO */
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2013-12-04 22:25:16 +01:00
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/* */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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2013-05-27 21:33:23 +02:00
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}
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2013-11-20 23:12:00 +01:00
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case CAPWAP_STATION_CONFIGURATION_RESPONSE: {
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/* TODO */
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2013-12-04 22:25:16 +01:00
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/* */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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}
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case CAPWAP_IEEE80211_WLAN_CONFIGURATION_RESPONSE: {
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2013-12-04 22:25:16 +01:00
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receive_ieee80211_wlan_configuration_response(session, packet);
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(AC_MAX_ECHO_INTERVAL, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-11-20 23:12:00 +01:00
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break;
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2013-05-01 14:52:55 +02:00
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}
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}
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}
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2013-12-04 22:25:16 +01:00
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} else if ((session->requestfragmentpacket->count > 0)) {
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/* No response received */
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session->dfa.rfcRetransmitCount++;
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if (session->dfa.rfcRetransmitCount >= session->dfa.rfcMaxRetransmit) {
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/* Timeout */
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ac_free_reference_last_request(session);
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ac_session_teardown(session);
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} else {
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/* Retransmit request */
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if (!capwap_crypt_sendto_fragmentpacket(&session->dtls, session->connection.socket.socket[session->connection.socket.type], session->requestfragmentpacket, &session->connection.localaddr, &session->connection.remoteaddr)) {
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capwap_logging_debug("Warning: error to resend request packet");
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}
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2013-05-01 14:52:55 +02:00
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2013-12-04 22:25:16 +01:00
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/* Update timeout */
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2014-02-19 19:16:33 +01:00
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capwap_timeout_set(session->dfa.rfcRetransmitInterval, session->timeout, CAPWAP_TIMER_CONTROL_CONNECTION);
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2013-12-04 22:25:16 +01:00
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}
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2013-05-27 21:33:23 +02:00
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} else {
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2013-11-05 17:54:29 +01:00
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ac_session_teardown(session);
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2013-05-01 14:52:55 +02:00
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}
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}
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