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;
} else if (ac_wlans_get_bssid_with_wlanid(session, notify->radioid, notify->wlanid)) {
return AC_NO_ERROR;
}
/* */
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_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_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 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);
}
static int ac_session_action_authorizestation_response(struct ac_session_t* session, struct ac_soap_response* response, struct ac_notify_station_configuration_ieee8011_add_station* notify) {
int result = -1;
int ifindex = -1;
uint16_t vlan = 0;
struct ac_if_datachannel* datachannel;
struct ac_wlan* wlan;
struct json_object* jsonroot;
struct json_object* jsonsection;
struct json_object* jsonelement;
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
struct capwap_addstation_element addstation;
struct capwap_80211_station_element station;
/* Receive SOAP response with JSON result
{
DataChannelInterface: {
Index: [int],
VLAN: [int/string]
},
}
*/
/* */
jsonroot = ac_soapclient_parse_json_response(response);
if (!jsonroot) {
return -1;
}
/* */
jsonsection = compat_json_object_object_get(jsonroot, "DataChannelInterface");
if (jsonsection && (json_object_get_type(jsonsection) == json_type_object)) {
jsonelement = compat_json_object_object_get(jsonsection, "Index");
if (jsonelement && (json_object_get_type(jsonelement) == json_type_int)) {
unsigned long index = (unsigned long)json_object_get_int(jsonelement);
/* Retrieve interface index */
capwap_rwlock_rdlock(&g_ac.ifdatachannellock);
datachannel = (struct ac_if_datachannel*)capwap_hash_search(g_ac.ifdatachannel, &index);
if (datachannel) {
ifindex = datachannel->ifindex;
}
capwap_rwlock_unlock(&g_ac.ifdatachannellock);
/* Prepare request */
if (ifindex >= 0) {
wlan = ac_wlans_get_bssid_with_wlanid(session, notify->radioid, notify->wlanid);
if (wlan) {
memset(&addstation, 0, sizeof(struct capwap_addstation_element));
addstation.radioid = notify->radioid;
addstation.length = MACADDRESS_EUI48_LENGTH;
addstation.address = notify->address;
if (wlan->tunnelmode == CAPWAP_ADD_WLAN_TUNNELMODE_LOCAL) {
jsonelement = compat_json_object_object_get(jsonsection, "VLAN");
if (jsonelement && (json_object_get_type(jsonelement) == json_type_string)) {
const char* wtpvlan = json_object_get_string(jsonelement);
if (wtpvlan && (strlen(wtpvlan) < CAPWAP_ADDSTATION_VLAN_MAX_LENGTH)) {
addstation.vlan = (uint8_t*)wtpvlan; /* Free with jsonroot */
}
}
}
/* */
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)) {
/* Retrive VLAN */
if (wlan->tunnelmode != CAPWAP_ADD_WLAN_TUNNELMODE_LOCAL) {
jsonelement = compat_json_object_object_get(jsonroot, "DataChannelInterface.VLAN");
if (jsonelement && (json_object_get_type(jsonelement) == json_type_int)) {
int acvlan = json_object_get_int(jsonelement);
if ((acvlan > 0) && (acvlan < VLAN_MAX)) {
vlan = (uint16_t)acvlan;
}
}
}
/* Authorize station also into kernel module */
if (!ac_kmod_authorize_station(&session->sessionid, addstation.address, ifindex, notify->radioid, notify->wlanid, vlan)) {
result = 0;
session->retransmitcount = 0;
capwap_timeout_set(session->timeout, session->idtimercontrol, AC_RETRANSMIT_INTERVAL, ac_dfa_retransmition_timeout, session, NULL);
} else {
capwap_logging_warning("Unable to authorize station into kernel module data channel");
ac_free_reference_last_request(session);
ac_session_teardown(session);
}
} else {
capwap_logging_debug("Warning: error to send Station Configuration Request packet");
ac_free_reference_last_request(session);
ac_session_teardown(session);
}
}
}
}
}
/* */
json_object_put(jsonroot);
return result;
}
static struct capwap_packet_txmng* ac_create_discovery_response(struct capwap_parsed_packet* packet) {
int i;
unsigned short binding;
struct capwap_list* controllist;
struct capwap_list_item* item;
struct capwap_header_data capwapheader;
struct capwap_packet_txmng* txmngpacket;
/* Check is valid binding */
binding = GET_WBID_HEADER(packet->rxmngpacket->header);
if (!ac_valid_binding(binding)) {
return NULL;
}
/* Update statistics */
ac_update_statistics();
/* Build packet */
capwap_header_init(&capwapheader, CAPWAP_RADIOID_NONE, binding);
txmngpacket = capwap_packet_txmng_create_ctrl_message(&capwapheader, CAPWAP_DISCOVERY_RESPONSE, packet->rxmngpacket->ctrlmsg.seq, g_ac.mtu);
/* Prepare discovery response */
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_ACDESCRIPTION, &g_ac.descriptor);
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_ACNAME, &g_ac.acname);
if (binding == CAPWAP_WIRELESS_BINDING_IEEE80211) {
struct capwap_array* wtpradioinformation = (struct capwap_array*)capwap_get_message_element_data(packet, CAPWAP_ELEMENT_80211_WTPRADIOINFORMATION);
for (i = 0; i < wtpradioinformation->count; i++) {
struct capwap_80211_wtpradioinformation_element* radio;
radio = *(struct capwap_80211_wtpradioinformation_element**)capwap_array_get_item_pointer(wtpradioinformation, i);
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_80211_WTPRADIOINFORMATION, radio);
}
}
/* Get information from any local address */
controllist = capwap_list_create();
ac_get_control_information(controllist);
for (item = controllist->first; item != NULL; item = item->next) {
struct ac_session_control* sessioncontrol = (struct ac_session_control*)item->item;
if (sessioncontrol->localaddress.ss.ss_family == AF_INET) {
struct capwap_controlipv4_element element;
memcpy(&element.address, &((struct sockaddr_in*)&sessioncontrol->localaddress)->sin_addr, sizeof(struct in_addr));
element.wtpcount = sessioncontrol->count;
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_CONTROLIPV4, &element);
} else if (sessioncontrol->localaddress.ss.ss_family == AF_INET6) {
struct capwap_controlipv6_element element;
memcpy(&element.address, &((struct sockaddr_in6*)&sessioncontrol->localaddress)->sin6_addr, sizeof(struct in6_addr));
element.wtpcount = sessioncontrol->count;
capwap_packet_txmng_add_message_element(txmngpacket, CAPWAP_ELEMENT_CONTROLIPV6, &element);
}
}
capwap_list_free(controllist);
/* CAPWAP_ELEMENT_VENDORPAYLOAD */ /* TODO */
return txmngpacket;
}
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);
}
}