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freewtp/src/ac/ac_session.c

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#include <stdarg.h>
#include "ac.h"
#include "capwap_dfa.h"
#include "ac_session.h"
#include "ac_wlans.h"
#include "ac_backend.h"
#include <arpa/inet.h>
#define AC_NO_ERROR -1000
#define AC_ERROR_TIMEOUT -1001
/* */
static int ac_session_action_resetwtp(struct ac_session_t* session, struct ac_notify_reset_t* reset) {
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
struct capwap_imageidentifier_element imageidentifier;
ASSERT(session->requestfragmentpacket->count == 0);
/* */
imageidentifier.vendor = reset->vendor;
imageidentifier.name = reset->name;
/* Build packet */
capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, session->binding);
txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_RESET_REQUEST, session->localseqnumber++, session->mtu);
/* Add message element */
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_IMAGEIDENTIFIER, &imageidentifier);
/* CAPWAP_ELEMENT_VENDORPAYLOAD */ /* TODO */
/* Reset request complete, get fragment packets */
capwap_packet_txmng_get_fragment_packets(txmngpacket, session->requestfragmentpacket, session->fragmentid);
if (session->requestfragmentpacket->count > 1) {
session->fragmentid++;
}
/* Free packets manager */
capwap_packet_txmng_free(txmngpacket);
/* Send Reset Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
ac_dfa_change_state(session, CAPWAP_RESET_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
capwap_logging_debug("Warning: error to send Reset Request packet");
ac_free_reference_last_request(session);
ac_session_teardown(session);
}
return AC_NO_ERROR;
}
/* */
static int ac_session_action_addwlan(struct ac_session_t* session, struct ac_notify_addwlan_t* notify) {
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
struct capwap_80211_addwlan_element addwlan;
ASSERT(session->requestfragmentpacket->count == 0);
/* Check if WLAN id is valid and not used */
if (!IS_VALID_RADIOID(notify->radioid) || !IS_VALID_WLANID(notify->wlanid)) {
return AC_NO_ERROR;
#if 0
} else if (ac_wlans_get_bssid_with_wlanid(session, notify->radioid, notify->wlanid)) {
return AC_NO_ERROR;
#endif
}
/* */
memset(&addwlan, 0, sizeof(struct capwap_80211_addwlan_element));
addwlan.radioid = notify->radioid;
addwlan.wlanid = notify->wlanid;
addwlan.capability = notify->capability;
addwlan.qos = notify->qos;
addwlan.authmode = notify->authmode;
addwlan.macmode = notify->macmode;
addwlan.tunnelmode = notify->tunnelmode;
addwlan.suppressssid = notify->suppressssid;
addwlan.ssid = (uint8_t*)notify->ssid;
/* Build packet */
capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, session->binding);
txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_IEEE80211_WLAN_CONFIGURATION_REQUEST, session->localseqnumber++, session->mtu);
/* Add message element */
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_80211_ADD_WLAN, &addwlan);
/* CAPWAP_ELEMENT_80211_IE */
/* CAPWAP_ELEMENT_VENDORPAYLOAD */ /* TODO */
/* WLAN Configuration Request complete, get fragment packets */
capwap_packet_txmng_get_fragment_packets(txmngpacket, session->requestfragmentpacket, session->fragmentid);
if (session->requestfragmentpacket->count > 1) {
session->fragmentid++;
}
/* Free packets manager */
capwap_packet_txmng_free(txmngpacket);
/* Send WLAN Configuration Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
capwap_logging_debug("Warning: error to send WLAN Configuration Request packet");
ac_free_reference_last_request(session);
ac_session_teardown(session);
}
return AC_NO_ERROR;
}
/* */
static int ac_session_action_station_configuration_ieee8011_add_station(struct ac_session_t* session, struct ac_notify_station_configuration_ieee8011_add_station* notify) {
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
struct capwap_addstation_element addstation;
struct capwap_80211_station_element station;
ASSERT(session->requestfragmentpacket->count == 0);
/* Check if RADIO id and WLAN id is valid */
if (!IS_VALID_RADIOID(notify->radioid) || !IS_VALID_WLANID(notify->wlanid)) {
return AC_NO_ERROR;
}
/* */
memset(&addstation, 0, sizeof(struct capwap_addstation_element));
addstation.radioid = notify->radioid;
addstation.length = MACADDRESS_EUI48_LENGTH;
addstation.address = notify->address;
if (notify->vlan[0]) {
addstation.vlan = notify->vlan;
}
/* */
memset(&station, 0, sizeof(struct capwap_80211_station_element));
station.radioid = notify->radioid;
station.associationid = notify->associationid;
memcpy(station.address, notify->address, MACADDRESS_EUI48_LENGTH);
station.capabilities = notify->capabilities;
station.wlanid = notify->wlanid;
station.supportedratescount = notify->supportedratescount;
memcpy(station.supportedrates, notify->supportedrates, station.supportedratescount);
/* Build packet */
capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, session->binding);
txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_STATION_CONFIGURATION_REQUEST, session->localseqnumber++, session->mtu);
/* Add message element */
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_ADDSTATION, &addstation);
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_80211_STATION, &station);
/* CAPWAP_ELEMENT_VENDORPAYLOAD */ /* TODO */
/* Station Configuration Request complete, get fragment packets */
capwap_packet_txmng_get_fragment_packets(txmngpacket, session->requestfragmentpacket, session->fragmentid);
if (session->requestfragmentpacket->count > 1) {
session->fragmentid++;
}
/* Free packets manager */
capwap_packet_txmng_free(txmngpacket);
/* Send Station Configuration Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
capwap_logging_debug("Warning: error to send Station Configuration Request packet");
ac_free_reference_last_request(session);
ac_session_teardown(session);
}
return AC_NO_ERROR;
}
/* */
static int ac_session_action_station_configuration_ieee8011_delete_station(struct ac_session_t* session, struct ac_notify_station_configuration_ieee8011_delete_station* notify) {
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
struct capwap_deletestation_element deletestation;
ASSERT(session->requestfragmentpacket->count == 0);
/* Check if RADIO id is valid */
if (!IS_VALID_RADIOID(notify->radioid)) {
return AC_NO_ERROR;
}
/* */
memset(&deletestation, 0, sizeof(struct capwap_deletestation_element));
deletestation.radioid = notify->radioid;
deletestation.length = MACADDRESS_EUI48_LENGTH;
deletestation.address = notify->address;
/* Build packet */
capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, session->binding);
txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_STATION_CONFIGURATION_REQUEST, session->localseqnumber++, session->mtu);
/* Add message element */
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_DELETESTATION, &deletestation);
/* CAPWAP_ELEMENT_VENDORPAYLOAD */ /* TODO */
/* Station Configuration Request complete, get fragment packets */
capwap_packet_txmng_get_fragment_packets(txmngpacket, session->requestfragmentpacket, session->fragmentid);
if (session->requestfragmentpacket->count > 1) {
session->fragmentid++;
}
/* Free packets manager */
capwap_packet_txmng_free(txmngpacket);
/* Send Station Configuration Request to WTP */
if (capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
session->retransmitcount = 0;
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
capwap_logging_debug("Warning: error to send Station Configuration Request packet");
ac_free_reference_last_request(session);
ac_session_teardown(session);
}
return AC_NO_ERROR;
}
/* */
static int ac_session_action_recv_ieee80211_mgmt_packet(struct ac_session_t* session, struct capwap_header* header, long length) {
long headersize;
/* Retrieve info */
headersize = GET_HLEN_HEADER(header) * 4;
if ((GET_WBID_HEADER(header) == CAPWAP_WIRELESS_BINDING_IEEE80211) && ((length - headersize) >= sizeof(struct ieee80211_header))) {
ac_ieee80211_packet(session, GET_RID_HEADER(header), (struct ieee80211_header*)(((char*)header) + headersize), (length - headersize));
}
return AC_NO_ERROR;
}
/* */
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->sockaddrdata.ss);
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;
}
/* */
static int ac_network_read(struct ac_session_t* session, void* buffer, int length) {
int result = 0;
long waittimeout;
ASSERT(session != NULL);
ASSERT(buffer != NULL);
ASSERT(length > 0);
for (;;) {
capwap_lock_enter(&session->sessionlock);
if (!session->running) {
capwap_lock_exit(&session->sessionlock);
return CAPWAP_ERROR_CLOSE;
} else if (!session->requestfragmentpacket->count && (session->action->count > 0)) {
struct capwap_list_item* itemaction;
itemaction = capwap_itemlist_remove_head(session->action);
capwap_lock_exit(&session->sessionlock);
/* */
result = ac_session_action_execute(session, (struct ac_session_action*)itemaction->item);
/* Free packet */
capwap_itemlist_free(itemaction);
return result;
} else if (session->packets->count > 0) {
struct capwap_list_item* itempacket;
/* Get packet */
itempacket = capwap_itemlist_remove_head(session->packets);
capwap_lock_exit(&session->sessionlock);
if (itempacket) {
struct ac_packet* packet = (struct ac_packet*)itempacket->item;
long packetlength = itempacket->itemsize - sizeof(struct ac_packet);
if (!packet->plainbuffer && session->dtls.enable) {
int oldaction = session->dtls.action;
/* Decrypt packet */
result = capwap_decrypt_packet(&session->dtls, packet->buffer, packetlength, buffer, length);
if (result == CAPWAP_ERROR_AGAIN) {
/* Check is handshake complete */
if ((oldaction == CAPWAP_DTLS_ACTION_HANDSHAKE) && (session->dtls.action == CAPWAP_DTLS_ACTION_DATA)) {
if (session->state == CAPWAP_DTLS_CONNECT_STATE) {
ac_dfa_change_state(session, CAPWAP_JOIN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_JOIN_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
}
}
}
} else {
if (packetlength <= length) {
memcpy(buffer, packet->buffer, packetlength);
result = packetlength;
}
}
/* Free packet */
capwap_itemlist_free(itempacket);
}
return result;
}
capwap_lock_exit(&session->sessionlock);
/* Get timeout */
waittimeout = capwap_timeout_getcoming(session->timeout);
if (!waittimeout) {
capwap_timeout_hasexpired(session->timeout);
return AC_ERROR_TIMEOUT;
}
/* Wait packet */
capwap_event_wait_timeout(&session->waitpacket, waittimeout);
}
return 0;
}
/* */
static void ac_dfa_execute(struct ac_session_t* session, struct capwap_parsed_packet* packet) {
ASSERT(session != NULL);
ASSERT(packet != NULL);
/* Execute state */
switch (session->state) {
case CAPWAP_DTLS_CONNECT_STATE: {
ac_session_teardown(session);
break;
}
case CAPWAP_JOIN_STATE: {
ac_dfa_state_join(session, packet);
break;
}
case CAPWAP_POSTJOIN_STATE: {
ac_dfa_state_postjoin(session, packet);
break;
}
case CAPWAP_IMAGE_DATA_STATE: {
ac_dfa_state_imagedata(session, packet);
break;
}
case CAPWAP_CONFIGURE_STATE: {
ac_dfa_state_configure(session, packet);
break;
}
case CAPWAP_RESET_STATE: {
ac_dfa_state_reset(session, packet);
break;
}
case CAPWAP_DATA_CHECK_STATE: {
ac_dfa_state_datacheck(session, packet);
break;
}
case CAPWAP_RUN_STATE: {
ac_dfa_state_run(session, packet);
break;
}
default: {
capwap_logging_debug("Unknown action event: %lu", session->state);
break;
}
}
}
/* */
static void ac_send_invalid_request(struct ac_session_t* session, uint32_t errorcode) {
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
struct capwap_list* responsefragmentpacket;
struct capwap_fragment_packet_item* packet;
struct capwap_header* header;
struct capwap_resultcode_element resultcode = { .code = errorcode };
ASSERT(session != NULL);
ASSERT(session->rxmngpacket != NULL);
ASSERT(session->rxmngpacket->fragmentlist->first != NULL);
/* */
packet = (struct capwap_fragment_packet_item*)session->rxmngpacket->fragmentlist->first->item;
header = (struct capwap_header*)packet->buffer;
/* Odd message type */
capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, GET_WBID_HEADER(header));
txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, session->rxmngpacket->ctrlmsg.type + 1, session->rxmngpacket->ctrlmsg.seq, session->mtu);
/* Add message element */
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_RESULTCODE, &resultcode);
/* Unknown response complete, get fragment packets */
responsefragmentpacket = capwap_list_create();
capwap_packet_txmng_get_fragment_packets(txmngpacket, responsefragmentpacket, session->fragmentid);
if (responsefragmentpacket->count > 1) {
session->fragmentid++;
}
/* Free packets manager */
capwap_packet_txmng_free(txmngpacket);
/* Send unknown response */
capwap_crypt_sendto_fragmentpacket(&session->dtls, responsefragmentpacket);
/* Don't buffering a packets sent */
capwap_list_free(responsefragmentpacket);
}
/* 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->sockaddrdata.ss, &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);
}
/* */
static void ac_session_run(struct ac_session_t* session) {
int res;
int check;
int length;
struct capwap_list_item* search;
char buffer[CAPWAP_MAX_PACKET_SIZE];
ASSERT(session != NULL);
/* Configure DFA */
if (g_ac.enabledtls) {
if (!ac_dtls_setup(session)) {
ac_session_teardown(session); /* Teardown connection */
}
} else {
/* Wait Join request */
ac_dfa_change_state(session, CAPWAP_JOIN_STATE);
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_JOIN_INTERVAL, ac_dfa_teardown_timeout, session, NULL);
}
while (session->state != CAPWAP_DTLS_TEARDOWN_STATE) {
/* Get packet */
length = ac_network_read(session, buffer, sizeof(buffer));
if (length < 0) {
if ((length == CAPWAP_ERROR_SHUTDOWN) || (length == CAPWAP_ERROR_CLOSE)) {
ac_session_teardown(session);
}
} else if (length > 0) {
/* Check generic capwap packet */
check = capwap_sanity_check(CAPWAP_UNDEF_STATE, buffer, length, 0);
if (check == CAPWAP_PLAIN_PACKET) {
struct capwap_parsed_packet packet;
/* Defragment management */
if (!session->rxmngpacket) {
session->rxmngpacket = capwap_packet_rxmng_create_message();
}
/* If request, defragmentation packet */
check = capwap_packet_rxmng_add_recv_packet(session->rxmngpacket, buffer, length);
if (check == CAPWAP_RECEIVE_COMPLETE_PACKET) {
/* Receive all fragment */
if (capwap_is_request_type(session->rxmngpacket->ctrlmsg.type) && (session->remotetype == session->rxmngpacket->ctrlmsg.type) && (session->remoteseqnumber == session->rxmngpacket->ctrlmsg.seq)) {
/* Retransmit response */
if (!capwap_crypt_sendto_fragmentpacket(&session->dtls, session->responsefragmentpacket)) {
capwap_logging_error("Error to resend response packet");
} else {
capwap_logging_debug("Retrasmitted control packet");
}
} else {
/* Check message type */
res = capwap_check_message_type(session->rxmngpacket);
if (res == VALID_MESSAGE_TYPE) {
res = capwap_parsing_packet(session->rxmngpacket, &packet);
if (res == PARSING_COMPLETE) {
int hasrequest = capwap_is_request_type(session->rxmngpacket->ctrlmsg.type);
/* Validate packet */
if (!capwap_validate_parsed_packet(&packet, NULL)) {
/* 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 (hasrequest && (notify->action == NOTIFY_ACTION_RECEIVE_REQUEST_CONTROLMESSAGE)) {
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;
} else if (!hasrequest && (notify->action == NOTIFY_ACTION_RECEIVE_RESPONSE_CONTROLMESSAGE)) {
char buffer[4];
struct ac_soap_response* response;
struct capwap_resultcode_element* resultcode;
/* Check the success of the Request */
resultcode = (struct capwap_resultcode_element*)capwap_get_message_element_data(&packet, CAPWAP_ELEMENT_RESULTCODE);
response = ac_soap_updatebackendevent(session, notify->idevent, capwap_itoa(((!resultcode || CAPWAP_RESULTCODE_OK(resultcode->code)) ? SOAP_EVENT_STATUS_COMPLETE : SOAP_EVENT_STATUS_GENERIC_ERROR), buffer));
if (response) {
ac_soapclient_free_response(response);
}
/* Remove notify event */
capwap_itemlist_free(capwap_itemlist_remove(session->notifyevent, search));
break;
}
search = search->next;
}
/* */
ac_dfa_execute(session, &packet);
} else {
capwap_logging_debug("Failed validation parsed control packet");
if (capwap_is_request_type(session->rxmngpacket->ctrlmsg.type)) {
capwap_logging_warning("Missing Mandatory Message Element, send Response Packet with error");
ac_send_invalid_request(session, CAPWAP_RESULTCODE_FAILURE_MISSING_MANDATORY_MSG_ELEMENT);
}
}
} else {
capwap_logging_debug("Failed parsing packet");
if ((res == UNRECOGNIZED_MESSAGE_ELEMENT) && capwap_is_request_type(session->rxmngpacket->ctrlmsg.type)) {
capwap_logging_warning("Unrecognized Message Element, send Response Packet with error");
ac_send_invalid_request(session, CAPWAP_RESULTCODE_FAILURE_UNRECOGNIZED_MESSAGE_ELEMENT);
/* TODO: add the unrecognized message element */
}
}
} else {
capwap_logging_debug("Invalid message type");
if (res == INVALID_REQUEST_MESSAGE_TYPE) {
capwap_logging_warning("Unexpected Unrecognized Request, send Response Packet with error");
ac_send_invalid_request(session, CAPWAP_RESULTCODE_MSG_UNEXPECTED_UNRECOGNIZED_REQUEST);
}
}
}
/* Free memory */
capwap_free_parsed_packet(&packet);
if (session->rxmngpacket) {
capwap_packet_rxmng_free(session->rxmngpacket);
session->rxmngpacket = NULL;
}
} else if (check != CAPWAP_REQUEST_MORE_FRAGMENT) {
/* Discard fragments */
if (session->rxmngpacket) {
capwap_packet_rxmng_free(session->rxmngpacket);
session->rxmngpacket = NULL;
}
}
}
}
}
/* Wait teardown timeout before kill session */
capwap_timeout_wait(AC_DTLS_SESSION_DELETE_INTERVAL);
ac_dfa_state_teardown(session);
/* Release reference session */
ac_session_destroy(session);
}
/* 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;
}
}
}
/* Teardown connection */
void ac_session_teardown(struct ac_session_t* session) {
ASSERT(session != NULL);
/* Remove session from list */
capwap_rwlock_wrlock(&g_ac.sessionslock);
capwap_itemlist_remove(g_ac.sessions, session->itemlist);
capwap_rwlock_exit(&g_ac.sessionslock);
/* Remove all pending packets */
while (session->packets->count > 0) {
capwap_itemlist_free(capwap_itemlist_remove_head(session->packets));
}
/* Close DTSL Control */
if (session->dtls.enable) {
capwap_crypt_close(&session->dtls);
}
/* Cancel all notify event */
if (session->notifyevent->first) {
char buffer[5];
struct ac_soap_response* response;
capwap_itoa(SOAP_EVENT_STATUS_CANCEL, buffer);
while (session->notifyevent->first != NULL) {
struct ac_session_notify_event_t* notify = (struct ac_session_notify_event_t*)session->notifyevent->first->item;
/* Cancel event */
response = ac_soap_updatebackendevent(session, notify->idevent, buffer);
if (response) {
ac_soapclient_free_response(response);
}
/* Remove notify event */
capwap_itemlist_free(capwap_itemlist_remove(session->notifyevent, session->notifyevent->first));
}
}
/* Remove timer */
if (session->idtimercontrol != CAPWAP_TIMEOUT_INDEX_NO_SET) {
capwap_timeout_unset(session->timeout, session->idtimercontrol);
session->idtimercontrol = CAPWAP_TIMEOUT_INDEX_NO_SET;
}
if (session->idtimerkeepalivedead != CAPWAP_TIMEOUT_INDEX_NO_SET) {
capwap_timeout_unset(session->timeout, session->idtimerkeepalivedead);
session->idtimerkeepalivedead = CAPWAP_TIMEOUT_INDEX_NO_SET;
}
/* */
ac_dfa_change_state(session, CAPWAP_DTLS_TEARDOWN_STATE);
}
/* */
void* ac_session_thread(void* param) {
pthread_t threadid;
struct ac_session_t* session = (struct ac_session_t*)param;
ASSERT(param != NULL);
threadid = session->threadid;
/* */
capwap_logging_debug("Session start");
ac_session_run(session);
capwap_logging_debug("Session end");
/* Notify terminate thread */
ac_msgqueue_notify_closethread(threadid);
/* Thread exit */
pthread_exit(NULL);
return NULL;
}
/* */
void ac_get_control_information(struct capwap_list* controllist) {
int count;
struct capwap_list_item* item;
ASSERT(controllist != NULL);
/* */
capwap_rwlock_rdlock(&g_ac.sessionslock);
count = g_ac.sessions->count;
capwap_rwlock_exit(&g_ac.sessionslock);
/* Prepare control list */
for (item = g_ac.addrlist->first; item != NULL; item = item->next) {
struct capwap_list_item* itemcontrol;
struct ac_session_control* sessioncontrol;
union sockaddr_capwap* address = (union sockaddr_capwap*)item->item;
/* */
itemcontrol = capwap_itemlist_create(sizeof(struct ac_session_control));
sessioncontrol = (struct ac_session_control*)itemcontrol->item;
memcpy(&sessioncontrol->localaddress, address, sizeof(union sockaddr_capwap));
sessioncontrol->count = count;
/* Add */
capwap_itemlist_insert_after(controllist, NULL, itemcontrol);
}
}
/* */
void ac_free_reference_last_request(struct ac_session_t* session) {
ASSERT(session);
capwap_list_flush(session->requestfragmentpacket);
}
/* */
void ac_free_reference_last_response(struct ac_session_t* session) {
ASSERT(session);
capwap_list_flush(session->responsefragmentpacket);
session->remotetype = 0;
session->remoteseqnumber = 0;
}
/* */
struct ac_soap_response* ac_session_send_soap_request(struct ac_session_t* session, char* method, int numparam, ...) {
int i;
va_list listparam;
struct ac_soap_response* response = NULL;
ASSERT(session != NULL);
ASSERT(session->soaprequest == NULL);
ASSERT(method != NULL);
/* Build Soap Request */
capwap_lock_enter(&session->sessionlock);
session->soaprequest = ac_backend_createrequest_with_session(method, SOAP_NAMESPACE_URI);
capwap_lock_exit(&session->sessionlock);
/* */
if (!session->soaprequest) {
return NULL;
}
/* Add params */
va_start(listparam, numparam);
for (i = 0; i < numparam; i++) {
char* type = va_arg(listparam, char*);
char* name = va_arg(listparam, char*);
char* value = va_arg(listparam, char*);
if (!ac_soapclient_add_param(session->soaprequest->request, type, name, value)) {
ac_soapclient_close_request(session->soaprequest, 1);
session->soaprequest = NULL;
break;
}
}
va_end(listparam);
/* Send Request & Recv Response */
if (session->soaprequest) {
if (ac_soapclient_send_request(session->soaprequest, "")) {
response = ac_soapclient_recv_response(session->soaprequest);
}
/* Critical section */
capwap_lock_enter(&session->sessionlock);
/* Free resource */
ac_soapclient_close_request(session->soaprequest, 1);
session->soaprequest = NULL;
capwap_lock_exit(&session->sessionlock);
}
return response;
}
/* */
void ac_dfa_retransmition_timeout(struct capwap_timeout* timeout, unsigned long index, void* context, void* param) {
struct ac_session_t* session = (struct ac_session_t*)context;
if (!session->requestfragmentpacket->count) {
capwap_logging_warning("Invalid retransmition request packet");
ac_session_teardown(session);
} else {
session->retransmitcount++;
if (session->retransmitcount >= AC_MAX_RETRANSMIT) {
capwap_logging_info("Retransmition request packet timeout");
/* Timeout reset state */
ac_free_reference_last_request(session);
ac_session_teardown(session);
} else {
/* Retransmit Request */
capwap_logging_debug("Retransmition request packet");
if (!capwap_crypt_sendto_fragmentpacket(&session->dtls, session->requestfragmentpacket)) {
capwap_logging_error("Error to send request packet");
}
/* Update timeout */
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
}
}
}
void ac_dfa_teardown_timeout(struct capwap_timeout* timeout, unsigned long index, void* context, void* param) {
capwap_logging_info("Session timeout, teardown");
ac_session_teardown((struct ac_session_t*)context);
}
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