480 lines
15 KiB
C
480 lines
15 KiB
C
#include "ac.h"
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#include "ac_session.h"
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#include "ac_wlans.h"
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#include "ac_backend.h"
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/* */
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static void ac_stations_delete_station_from_global_cache(struct ac_session_t* session, uint8_t* address) {
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struct ac_session_t* ownersession;
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ASSERT(session != NULL);
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ASSERT(address != NULL);
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/* */
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capwap_rwlock_wrlock(&g_ac.stationslock);
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/* Can delete global reference only if match session handler */
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ownersession = (struct ac_session_t*)capwap_hash_search(g_ac.stations, address);
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if (ownersession == session) {
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capwap_hash_delete(g_ac.stations, address);
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}
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capwap_rwlock_exit(&g_ac.stationslock);
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}
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/* */
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static void ac_stations_reset_station(struct ac_session_t* session, struct ac_station* station, struct ac_wlan* wlan) {
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ASSERT(session != NULL);
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ASSERT(station != NULL);
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if (station->wlan) {
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if (station->aid) {
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if (station->wlan->macmode == CAPWAP_ADD_WLAN_MACMODE_SPLIT) {
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ieee80211_aid_free(station->wlan->aidbitfield, station->aid);
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}
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station->aid = 0;
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}
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/* Remove reference from current WLAN */
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capwap_itemlist_remove(station->wlan->stations, station->wlanitem);
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}
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/* Remove timers */
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if (station->idtimeout != CAPWAP_TIMEOUT_INDEX_NO_SET) {
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capwap_timeout_deletetimer(session->timeout, station->idtimeout);
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station->idtimeout = CAPWAP_TIMEOUT_INDEX_NO_SET;
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}
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/* */
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station->flags = 0;
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/* Set WLAN */
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station->wlan = wlan;
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if (station->wlan) {
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capwap_itemlist_insert_after(wlan->stations, NULL, station->wlanitem);
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}
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}
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/* */
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static void ac_stations_destroy_station(struct ac_session_t* session, struct ac_station* station) {
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ASSERT(session != NULL);
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ASSERT(station != NULL);
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/* */
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capwap_logging_info("Destroy station: %s", station->addrtext);
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/* Remove reference from Global Cache Stations List */
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ac_stations_delete_station_from_global_cache(session, station->address);
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/* Remove reference from WLAN */
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ac_stations_reset_station(session, station, NULL);
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/* */
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capwap_hash_delete(session->wlans->stations, station->address);
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/* Free station reference with itemlist */
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capwap_itemlist_free(station->wlanitem);
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}
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/* */
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static unsigned long ac_wlans_item_gethash(const void* key, unsigned long keysize, unsigned long hashsize) {
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uint8_t* macaddress = (uint8_t*)key;
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ASSERT(keysize == MACADDRESS_EUI48_LENGTH);
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return (unsigned long)(macaddress[3] ^ macaddress[4] ^ macaddress[5]);
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}
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/* */
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void ac_wlans_init(struct ac_session_t* session) {
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int i;
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ASSERT(session != NULL);
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ASSERT(session->wlans == NULL);
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/* */
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session->wlans = (struct ac_wlans*)capwap_alloc(sizeof(struct ac_wlans));
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memset(session->wlans, 0, sizeof(struct ac_wlans));
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/* */
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session->wlans->stations = capwap_hash_create(AC_WLANS_STATIONS_HASH_SIZE, AC_WLANS_STATIONS_KEY_SIZE, ac_wlans_item_gethash, NULL, NULL);
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for (i = 0; i < RADIOID_MAX_COUNT; i++) {
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session->wlans->devices[i].radioid = i + 1;
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}
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}
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/* */
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void ac_wlans_destroy(struct ac_session_t* session) {
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int i;
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struct capwap_list* items;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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/* */
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for (i = 0; i < RADIOID_MAX_COUNT; i++) {
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if (session->wlans->devices[i].wlans) {
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items = session->wlans->devices[i].wlans;
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/* Delete WLANS */
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while (items->first) {
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ac_wlans_delete_bssid(session, i + 1, ((struct ac_wlan*)items->first->item)->address);
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}
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/* */
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capwap_list_free(items);
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}
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}
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/* */
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ASSERT(session->wlans->stations->count == 0);
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/* */
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capwap_hash_free(session->wlans->stations);
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capwap_free(session->wlans);
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}
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/* */
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int ac_wlans_assign_bssid(struct ac_session_t* session, struct ac_wlan* wlan) {
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char buffer[CAPWAP_MACADDRESS_EUI48_BUFFER];
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(wlan != NULL);
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ASSERT(wlan->device != NULL);
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ASSERT(IS_VALID_RADIOID(wlan->device->radioid));
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ASSERT(IS_VALID_WLANID(wlan->wlanid));
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/* */
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if (ac_wlans_get_bssid(session, wlan->device->radioid, wlan->address)) {
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return 0;
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}
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/* */
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wlan->session = session;
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/* Create WLAN list */
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if (!session->wlans->devices[wlan->device->radioid - 1].wlans) {
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session->wlans->devices[wlan->device->radioid - 1].wlans = capwap_list_create();
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}
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/* Append WLAN to list */
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capwap_itemlist_insert_after(session->wlans->devices[wlan->device->radioid - 1].wlans, NULL, wlan->wlanitem);
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/* */
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capwap_logging_info("Added new wlan with radioid: %d, wlanid: %d, bssid: %s", (int)wlan->device->radioid, (int)wlan->wlanid, capwap_printf_macaddress(buffer, wlan->address, MACADDRESS_EUI48_LENGTH));
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return 1;
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}
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/* */
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struct ac_wlan* ac_wlans_create_bssid(struct ac_device* device, uint8_t wlanid, const uint8_t* bssid, struct capwap_80211_addwlan_element* addwlan) {
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struct ac_wlan* wlan;
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struct capwap_list_item* wlanitem;
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ASSERT(device != NULL);
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ASSERT(IS_VALID_WLANID(wlanid));
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ASSERT(bssid != NULL);
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/* */
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wlanitem = capwap_itemlist_create(sizeof(struct ac_wlan));
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wlan = (struct ac_wlan*)wlanitem->item;
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memset(wlan, 0, sizeof(struct ac_wlan));
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/* Init WLAN */
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wlan->wlanitem = wlanitem;
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memcpy(wlan->address, bssid, MACADDRESS_EUI48_LENGTH);
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wlan->device = device;
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wlan->wlanid = wlanid;
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wlan->stations = capwap_list_create();
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/* Set capability */
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wlan->capability = addwlan->capability;
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wlan->keyindex = addwlan->keyindex;
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wlan->keystatus = addwlan->keystatus;
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wlan->keylength = addwlan->keylength;
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if (addwlan->key && (addwlan->keylength > 0)) {
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wlan->key = (uint8_t*)capwap_clone(addwlan->key, wlan->keylength);
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}
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memcpy(wlan->grouptsc, addwlan->grouptsc, CAPWAP_ADD_WLAN_GROUPTSC_LENGTH);
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wlan->qos = addwlan->qos;
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wlan->authmode = addwlan->authmode;
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wlan->macmode = addwlan->macmode;
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wlan->tunnelmode = addwlan->tunnelmode;
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wlan->suppressssid = addwlan->suppressssid;
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strcpy(wlan->ssid, (const char*)addwlan->ssid);
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return wlan;
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}
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/* */
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struct ac_wlan* ac_wlans_get_bssid(struct ac_session_t* session, uint8_t radioid, const uint8_t* bssid) {
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struct capwap_list_item* search;
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struct ac_wlan* wlan = NULL;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(IS_VALID_RADIOID(radioid));
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ASSERT(bssid != NULL);
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/* */
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if (session->wlans->devices[radioid - 1].wlans) {
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for (search = session->wlans->devices[radioid - 1].wlans->first; search; search = search->next) {
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struct ac_wlan* item = (struct ac_wlan*)search->item;
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if (!memcmp(bssid, item->address, MACADDRESS_EUI48_LENGTH)) {
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wlan = item;
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break;
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}
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}
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}
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return wlan;
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}
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/* */
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struct ac_wlan* ac_wlans_get_bssid_with_wlanid(struct ac_session_t* session, uint8_t radioid, uint8_t wlanid) {
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struct capwap_list_item* search;
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struct ac_wlan* wlan = NULL;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(IS_VALID_RADIOID(radioid));
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ASSERT(IS_VALID_WLANID(wlanid));
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/* */
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if (session->wlans->devices[radioid - 1].wlans) {
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for (search = session->wlans->devices[radioid - 1].wlans->first; search; search = search->next) {
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struct ac_wlan* item = (struct ac_wlan*)search->item;
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if (wlanid == item->wlanid) {
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wlan = item;
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break;
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}
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}
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}
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return wlan;
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}
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/* */
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static void ac_wlans_destroy_bssid(struct ac_session_t* session, struct ac_wlan* wlan) {
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(wlan != NULL);
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/* Free capability */
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if (wlan->key) {
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capwap_free(wlan->key);
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}
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/* Remove stations */
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while (wlan->stations->first) {
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ac_stations_destroy_station(session, (struct ac_station*)wlan->stations->first->item);
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}
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/* */
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capwap_list_free(wlan->stations);
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}
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/* */
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void ac_wlans_delete_bssid(struct ac_session_t* session, uint8_t radioid, const uint8_t* bssid) {
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struct capwap_list_item* search;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(IS_VALID_RADIOID(radioid));
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ASSERT(bssid != NULL);
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/* */
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if (session->wlans->devices[radioid - 1].wlans) {
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for (search = session->wlans->devices[radioid - 1].wlans->first; search; search = search->next) {
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struct ac_wlan* item = (struct ac_wlan*)search->item;
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if (!memcmp(bssid, item->address, MACADDRESS_EUI48_LENGTH)) {
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ac_wlans_destroy_bssid(session, item);
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capwap_itemlist_free(capwap_itemlist_remove(session->wlans->devices[radioid - 1].wlans, search));
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break;
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}
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}
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}
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}
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/* */
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struct ac_station* ac_stations_get_station(struct ac_session_t* session, uint8_t radioid, const uint8_t* bssid, const uint8_t* address) {
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struct ac_station* station;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(address != NULL);
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/* Get station */
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station = (struct ac_station*)capwap_hash_search(session->wlans->stations, address);
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if (station && (station->flags & AC_STATION_FLAGS_ENABLED) && ((radioid == RADIOID_ANY) || (radioid == station->wlan->device->radioid)) && (!bssid || !memcmp(bssid, station->wlan->address, MACADDRESS_EUI48_LENGTH))) {
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return station;
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}
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return NULL;
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}
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/* */
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struct ac_station* ac_stations_create_station(struct ac_session_t* session, uint8_t radioid, const uint8_t* bssid, const uint8_t* address) {
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char buffer1[CAPWAP_MACADDRESS_EUI48_BUFFER];
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char buffer2[CAPWAP_MACADDRESS_EUI48_BUFFER];
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struct ac_wlan* wlan;
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struct ac_session_t* ownersession;
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struct capwap_list_item* stationitem;
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struct ac_station* station = NULL;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(IS_VALID_RADIOID(radioid));
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ASSERT(bssid != NULL);
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ASSERT(address != NULL);
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/* */
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capwap_printf_macaddress(buffer1, bssid, MACADDRESS_EUI48_LENGTH);
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capwap_printf_macaddress(buffer2, address, MACADDRESS_EUI48_LENGTH);
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capwap_logging_info("Create station to radioid: %d, bssid: %s, station address: %s", (int)radioid, buffer1, buffer2);
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/* */
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wlan = ac_wlans_get_bssid(session, radioid, bssid);
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if (wlan) {
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/* Get session that owns the station */
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capwap_rwlock_rdlock(&g_ac.stationslock);
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ownersession = (struct ac_session_t*)capwap_hash_search(g_ac.stations, address);
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capwap_rwlock_exit(&g_ac.stationslock);
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/* If request change owner of station */
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if (ownersession != session) {
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/* Release station from old owner */
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if (ownersession) {
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ac_session_send_action(ownersession, AC_SESSION_ACTION_STATION_ROAMING, 0, (void*)address, MACADDRESS_EUI48_LENGTH);
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}
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/* Set station into Global Cache Stations List */
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capwap_rwlock_wrlock(&g_ac.stationslock);
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capwap_hash_add(g_ac.stations, address, session);
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capwap_rwlock_exit(&g_ac.stationslock);
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}
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/* */
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station = (struct ac_station*)capwap_hash_search(session->wlans->stations, address);
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if (!station) {
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stationitem = capwap_itemlist_create(sizeof(struct ac_station));
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station = (struct ac_station*)stationitem->item;
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memset(station, 0, sizeof(struct ac_station));
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/* */
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station->idtimeout = CAPWAP_TIMEOUT_INDEX_NO_SET;
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memcpy(station->address, address, MACADDRESS_EUI48_LENGTH);
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capwap_printf_macaddress(station->addrtext, address, MACADDRESS_EUI48_LENGTH);
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station->wlanitem = stationitem;
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/* */
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capwap_hash_add(session->wlans->stations, address, station);
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}
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/* Set station to WLAN */
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ac_stations_reset_station(session, station, wlan);
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station->flags |= AC_STATION_FLAGS_ENABLED;
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} else {
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capwap_logging_warning("Unable to find radioid: %d, bssid: %s", (int)radioid, buffer1);
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}
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return station;
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}
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/* */
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void ac_stations_delete_station(struct ac_session_t* session, struct ac_station* station) {
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(station != NULL);
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/* Deauthorize station */
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ac_stations_deauthorize_station(session, station);
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/* Destroy station reference */
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ac_stations_destroy_station(session, station);
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}
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/* */
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void ac_stations_authorize_station(struct ac_session_t* session, struct ac_station* station) {
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struct ac_notify_station_configuration_ieee8011_add_station notify;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(station != NULL);
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/* Active Station only if Authenticated, Associated and not Authorizated */
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if ((station->flags & AC_STATION_FLAGS_AUTHENTICATED) && (station->flags & AC_STATION_FLAGS_ASSOCIATE) && !(station->flags & AC_STATION_FLAGS_AUTHORIZED)) {
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memset(¬ify, 0, sizeof(struct ac_notify_station_configuration_ieee8011_add_station));
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notify.radioid = station->wlan->device->radioid;
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memcpy(notify.address, station->address, MACADDRESS_EUI48_LENGTH);
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notify.wlanid = station->wlan->wlanid;
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notify.associationid = station->aid;
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notify.capabilities = station->capability;
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notify.supportedratescount = station->supportedratescount;
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memcpy(notify.supportedrates, station->supportedrates, station->supportedratescount);
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ac_session_send_action(session, AC_SESSION_ACTION_STATION_CONFIGURATION_IEEE80211_ADD_STATION, 0, ¬ify, sizeof(struct ac_notify_station_configuration_ieee8011_add_station));
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}
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}
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/* */
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void ac_stations_deauthorize_station(struct ac_session_t* session, struct ac_station* station) {
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int responselength;
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uint8_t buffer[IEEE80211_MTU];
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struct ieee80211_deauthentication_params ieee80211_params;
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struct ac_notify_station_configuration_ieee8011_delete_station notify;
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ASSERT(session != NULL);
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ASSERT(session->wlans != NULL);
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ASSERT(station != NULL);
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if (station->flags & AC_STATION_FLAGS_AUTHORIZED) {
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/* Deauthorize station */
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memset(¬ify, 0, sizeof(struct ac_notify_station_configuration_ieee8011_delete_station));
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notify.radioid = station->wlan->device->radioid;
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memcpy(notify.address, station->address, MACADDRESS_EUI48_LENGTH);
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/* */
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station->flags &= ~(AC_STATION_FLAGS_AUTHENTICATED | AC_STATION_FLAGS_ASSOCIATE | AC_STATION_FLAGS_AUTHORIZED);
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ac_session_send_action(session, AC_SESSION_ACTION_STATION_CONFIGURATION_IEEE80211_DELETE_STATION, 0, ¬ify, sizeof(struct ac_notify_station_configuration_ieee8011_delete_station));
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} else if (station->flags & AC_STATION_FLAGS_AUTHENTICATED) {
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/* Create deauthentication packet */
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memset(&ieee80211_params, 0, sizeof(struct ieee80211_deauthentication_params));
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memcpy(ieee80211_params.bssid, station->wlan->address, MACADDRESS_EUI48_LENGTH);
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memcpy(ieee80211_params.station, station->address, MACADDRESS_EUI48_LENGTH);
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ieee80211_params.reasoncode = IEEE80211_REASON_PREV_AUTH_NOT_VALID;
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/* */
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responselength = ieee80211_create_deauthentication(buffer, IEEE80211_MTU, &ieee80211_params);
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if (responselength > 0) {
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station->flags &= ~(AC_STATION_FLAGS_AUTHENTICATED | AC_STATION_FLAGS_ASSOCIATE);
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ac_kmod_send_data(&session->sockaddrdata.ss, station->wlan->device->radioid, session->binding, buffer, responselength);
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}
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}
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}
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/* */
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void ac_stations_timeout(struct capwap_timeout* timeout, unsigned long index, void* context, void* param) {
|
|
struct ac_station* station = (struct ac_station*)context;
|
|
|
|
ASSERT(station != NULL);
|
|
|
|
if (station->idtimeout == index) {
|
|
switch (station->timeoutaction) {
|
|
case AC_STATION_TIMEOUT_ACTION_DEAUTHENTICATE: {
|
|
capwap_logging_warning("The %s station has not completed the association in time", station->addrtext);
|
|
ac_stations_delete_station((struct ac_session_t*)param, station);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|