diff options
Diffstat (limited to 'net/wireless_ath/scan.c')
| -rwxr-xr-x | net/wireless_ath/scan.c | 1381 |
1 files changed, 0 insertions, 1381 deletions
diff --git a/net/wireless_ath/scan.c b/net/wireless_ath/scan.c deleted file mode 100755 index 8f5fa19..0000000 --- a/net/wireless_ath/scan.c +++ /dev/null @@ -1,1381 +0,0 @@ -/* - * cfg80211 scan result handling - * - * Copyright 2008 Johannes Berg <johannes@sipsolutions.net> - */ -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/wireless.h> -#include <linux/nl80211.h> -#include <linux/etherdevice.h> -#include <net/arp.h> -#include <net/cfg80211.h> -#include <net/cfg80211-wext.h> -#include <net/iw_handler.h> -#include "core.h" -#include "nl80211.h" -#include "wext-compat.h" - -#define IEEE80211_SCAN_RESULT_EXPIRE (15 * HZ) - -void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak) -{ - struct cfg80211_scan_request *request; - struct net_device *dev; -#ifdef CONFIG_CFG80211_WEXT - union iwreq_data wrqu; -#endif - - ASSERT_RDEV_LOCK(rdev); - - request = rdev->scan_req; - - if (!request) - return; - - dev = request->dev; - - /* - * This must be before sending the other events! - * Otherwise, wpa_supplicant gets completely confused with - * wext events. - */ - cfg80211_sme_scan_done(dev); - - if (request->aborted) - nl80211_send_scan_aborted(rdev, dev); - else - nl80211_send_scan_done(rdev, dev); - -#ifdef CONFIG_CFG80211_WEXT - if (!request->aborted) { - memset(&wrqu, 0, sizeof(wrqu)); - - wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); - } -#endif - - dev_put(dev); - - rdev->scan_req = NULL; - - /* - * OK. If this is invoked with "leak" then we can't - * free this ... but we've cleaned it up anyway. The - * driver failed to call the scan_done callback, so - * all bets are off, it might still be trying to use - * the scan request or not ... if it accesses the dev - * in there (it shouldn't anyway) then it may crash. - */ - if (!leak) - kfree(request); -} - -void __cfg80211_scan_done(struct work_struct *wk) -{ - struct cfg80211_registered_device *rdev; - - rdev = container_of(wk, struct cfg80211_registered_device, - scan_done_wk); - - cfg80211_lock_rdev(rdev); - ___cfg80211_scan_done(rdev, false); - cfg80211_unlock_rdev(rdev); -} - -void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted) -{ - WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req); - - request->aborted = aborted; - queue_work(cfg80211_wq, &wiphy_to_dev(request->wiphy)->scan_done_wk); -} -EXPORT_SYMBOL(cfg80211_scan_done); - -void __cfg80211_sched_scan_results(struct work_struct *wk) -{ - struct cfg80211_registered_device *rdev; - - rdev = container_of(wk, struct cfg80211_registered_device, - sched_scan_results_wk); - - mutex_lock(&rdev->sched_scan_mtx); - - /* we don't have sched_scan_req anymore if the scan is stopping */ - if (rdev->sched_scan_req) - nl80211_send_sched_scan_results(rdev, - rdev->sched_scan_req->dev); - - mutex_unlock(&rdev->sched_scan_mtx); -} - -void cfg80211_sched_scan_results(struct wiphy *wiphy) -{ - /* ignore if we're not scanning */ - if (wiphy_to_dev(wiphy)->sched_scan_req) - queue_work(cfg80211_wq, - &wiphy_to_dev(wiphy)->sched_scan_results_wk); -} -EXPORT_SYMBOL(cfg80211_sched_scan_results); - -void cfg80211_sched_scan_stopped(struct wiphy *wiphy) -{ - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); - - mutex_lock(&rdev->sched_scan_mtx); - __cfg80211_stop_sched_scan(rdev, true); - mutex_unlock(&rdev->sched_scan_mtx); -} -EXPORT_SYMBOL(cfg80211_sched_scan_stopped); - -int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, - bool driver_initiated) -{ - struct net_device *dev; - - lockdep_assert_held(&rdev->sched_scan_mtx); - - if (!rdev->sched_scan_req) - return -ENOENT; - - dev = rdev->sched_scan_req->dev; - - if (!driver_initiated) { - int err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev); - if (err) - return err; - } - - nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED); - - kfree(rdev->sched_scan_req); - rdev->sched_scan_req = NULL; - - return 0; -} - -static void bss_release(struct kref *ref) -{ - struct cfg80211_internal_bss *bss; - - bss = container_of(ref, struct cfg80211_internal_bss, ref); - if (bss->pub.free_priv) - bss->pub.free_priv(&bss->pub); - - if (bss->beacon_ies_allocated) - kfree(bss->pub.beacon_ies); - if (bss->proberesp_ies_allocated) - kfree(bss->pub.proberesp_ies); - - BUG_ON(atomic_read(&bss->hold)); - - kfree(bss); -} - -/* must hold dev->bss_lock! */ -void cfg80211_bss_age(struct cfg80211_registered_device *dev, - unsigned long age_secs) -{ - struct cfg80211_internal_bss *bss; - unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); - - list_for_each_entry(bss, &dev->bss_list, list) { - bss->ts -= age_jiffies; - } -} - -/* must hold dev->bss_lock! */ -static void __cfg80211_unlink_bss(struct cfg80211_registered_device *dev, - struct cfg80211_internal_bss *bss) -{ - list_del_init(&bss->list); - rb_erase(&bss->rbn, &dev->bss_tree); - kref_put(&bss->ref, bss_release); -} - -/* must hold dev->bss_lock! */ -void cfg80211_bss_expire(struct cfg80211_registered_device *dev) -{ - struct cfg80211_internal_bss *bss, *tmp; - bool expired = false; - - list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { - if (atomic_read(&bss->hold)) - continue; - if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE)) - continue; - __cfg80211_unlink_bss(dev, bss); - expired = true; - } - - if (expired) - dev->bss_generation++; -} - -/* must hold dev->bss_lock! */ -void cfg80211_bss_expire_all(struct cfg80211_registered_device *dev) -{ - struct cfg80211_internal_bss *bss, *tmp; - bool expired = false; - - printk("%s() Enter - steven", __func__); - - list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { - __cfg80211_unlink_bss(dev, bss); - expired = true; - } - - if (expired) - dev->bss_generation++; -} - -const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len) -{ - while (len > 2 && ies[0] != eid) { - len -= ies[1] + 2; - ies += ies[1] + 2; - } - if (len < 2) - return NULL; - if (len < 2 + ies[1]) - return NULL; - return ies; -} -EXPORT_SYMBOL(cfg80211_find_ie); - -const u8 *cfg80211_find_vendor_ie(unsigned int oui, u8 oui_type, - const u8 *ies, int len) -{ - struct ieee80211_vendor_ie *ie; - const u8 *pos = ies, *end = ies + len; - int ie_oui; - - while (pos < end) { - pos = cfg80211_find_ie(WLAN_EID_VENDOR_SPECIFIC, pos, - end - pos); - if (!pos) - return NULL; - - if (end - pos < sizeof(*ie)) - return NULL; - - ie = (struct ieee80211_vendor_ie *)pos; - ie_oui = ie->oui[0] << 16 | ie->oui[1] << 8 | ie->oui[2]; - if (ie_oui == oui && ie->oui_type == oui_type) - return pos; - - pos += 2 + ie->len; - } - return NULL; -} -EXPORT_SYMBOL(cfg80211_find_vendor_ie); - -static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) -{ - const u8 *ie1 = cfg80211_find_ie(num, ies1, len1); - const u8 *ie2 = cfg80211_find_ie(num, ies2, len2); - - /* equal if both missing */ - if (!ie1 && !ie2) - return 0; - /* sort missing IE before (left of) present IE */ - if (!ie1) - return -1; - if (!ie2) - return 1; - - /* sort by length first, then by contents */ - if (ie1[1] != ie2[1]) - return ie2[1] - ie1[1]; - return memcmp(ie1 + 2, ie2 + 2, ie1[1]); -} - -static bool is_bss(struct cfg80211_bss *a, - const u8 *bssid, - const u8 *ssid, size_t ssid_len) -{ - const u8 *ssidie; - - if (bssid && compare_ether_addr(a->bssid, bssid)) - return false; - - if (!ssid) - return true; - - ssidie = cfg80211_find_ie(WLAN_EID_SSID, - a->information_elements, - a->len_information_elements); - if (!ssidie) - return false; - if (ssidie[1] != ssid_len) - return false; - return memcmp(ssidie + 2, ssid, ssid_len) == 0; -} - -static bool is_mesh_bss(struct cfg80211_bss *a) -{ - const u8 *ie; - - if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability)) - return false; - - ie = cfg80211_find_ie(WLAN_EID_MESH_ID, - a->information_elements, - a->len_information_elements); - if (!ie) - return false; - - ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, - a->information_elements, - a->len_information_elements); - if (!ie) - return false; - - return true; -} - -static bool is_mesh(struct cfg80211_bss *a, - const u8 *meshid, size_t meshidlen, - const u8 *meshcfg) -{ - const u8 *ie; - - if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability)) - return false; - - ie = cfg80211_find_ie(WLAN_EID_MESH_ID, - a->information_elements, - a->len_information_elements); - if (!ie) - return false; - if (ie[1] != meshidlen) - return false; - if (memcmp(ie + 2, meshid, meshidlen)) - return false; - - ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, - a->information_elements, - a->len_information_elements); - if (!ie) - return false; - if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) - return false; - - /* - * Ignore mesh capability (last two bytes of the IE) when - * comparing since that may differ between stations taking - * part in the same mesh. - */ - return memcmp(ie + 2, meshcfg, - sizeof(struct ieee80211_meshconf_ie) - 2) == 0; -} - -static int cmp_bss_core(struct cfg80211_bss *a, - struct cfg80211_bss *b) -{ - int r; - - if (a->channel != b->channel) - return b->channel->center_freq - a->channel->center_freq; - - if (is_mesh_bss(a) && is_mesh_bss(b)) { - r = cmp_ies(WLAN_EID_MESH_ID, - a->information_elements, - a->len_information_elements, - b->information_elements, - b->len_information_elements); - if (r) - return r; - return cmp_ies(WLAN_EID_MESH_CONFIG, - a->information_elements, - a->len_information_elements, - b->information_elements, - b->len_information_elements); - } - - return memcmp(a->bssid, b->bssid, ETH_ALEN); -} - -static int cmp_bss(struct cfg80211_bss *a, - struct cfg80211_bss *b) -{ - int r; - - r = cmp_bss_core(a, b); - if (r) - return r; - - return cmp_ies(WLAN_EID_SSID, - a->information_elements, - a->len_information_elements, - b->information_elements, - b->len_information_elements); -} - -static int cmp_hidden_bss(struct cfg80211_bss *a, - struct cfg80211_bss *b) -{ - const u8 *ie1; - const u8 *ie2; - int i; - int r; - - r = cmp_bss_core(a, b); - if (r) - return r; - - ie1 = cfg80211_find_ie(WLAN_EID_SSID, - a->information_elements, - a->len_information_elements); - ie2 = cfg80211_find_ie(WLAN_EID_SSID, - b->information_elements, - b->len_information_elements); - - /* Key comparator must use same algorithm in any rb-tree - * search function (order is important), otherwise ordering - * of items in the tree is broken and search gives incorrect - * results. This code uses same order as cmp_ies() does. */ - - /* sort missing IE before (left of) present IE */ - if (!ie1) - return -1; - if (!ie2) - return 1; - - /* zero-size SSID is used as an indication of the hidden bss */ - if (!ie2[1]) - return 0; - - /* sort by length first, then by contents */ - if (ie1[1] != ie2[1]) - return ie2[1] - ie1[1]; - - /* zeroed SSID ie is another indication of a hidden bss */ - for (i = 0; i < ie2[1]; i++) - if (ie2[i + 2]) - return -1; - - return 0; -} - -struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, - struct ieee80211_channel *channel, - const u8 *bssid, - const u8 *ssid, size_t ssid_len, - u16 capa_mask, u16 capa_val) -{ - struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); - struct cfg80211_internal_bss *bss, *res = NULL; - unsigned long now = jiffies; - - spin_lock_bh(&dev->bss_lock); - - list_for_each_entry(bss, &dev->bss_list, list) { - if ((bss->pub.capability & capa_mask) != capa_val) - continue; - if (channel && bss->pub.channel != channel) - continue; - /* Don't get expired BSS structs */ - if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) && - !atomic_read(&bss->hold)) - continue; - if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { - res = bss; - kref_get(&res->ref); - break; - } - } - - spin_unlock_bh(&dev->bss_lock); - if (!res) - return NULL; - return &res->pub; -} -EXPORT_SYMBOL(cfg80211_get_bss); - -struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, - struct ieee80211_channel *channel, - const u8 *meshid, size_t meshidlen, - const u8 *meshcfg) -{ - struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); - struct cfg80211_internal_bss *bss, *res = NULL; - - spin_lock_bh(&dev->bss_lock); - - list_for_each_entry(bss, &dev->bss_list, list) { - if (channel && bss->pub.channel != channel) - continue; - if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) { - res = bss; - kref_get(&res->ref); - break; - } - } - - spin_unlock_bh(&dev->bss_lock); - if (!res) - return NULL; - return &res->pub; -} -EXPORT_SYMBOL(cfg80211_get_mesh); - - -static void rb_insert_bss(struct cfg80211_registered_device *dev, - struct cfg80211_internal_bss *bss) -{ - struct rb_node **p = &dev->bss_tree.rb_node; - struct rb_node *parent = NULL; - struct cfg80211_internal_bss *tbss; - int cmp; - - while (*p) { - parent = *p; - tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); - - cmp = cmp_bss(&bss->pub, &tbss->pub); - - if (WARN_ON(!cmp)) { - /* will sort of leak this BSS */ - return; - } - - if (cmp < 0) - p = &(*p)->rb_left; - else - p = &(*p)->rb_right; - } - - rb_link_node(&bss->rbn, parent, p); - rb_insert_color(&bss->rbn, &dev->bss_tree); -} - -static struct cfg80211_internal_bss * -rb_find_bss(struct cfg80211_registered_device *dev, - struct cfg80211_internal_bss *res) -{ - struct rb_node *n = dev->bss_tree.rb_node; - struct cfg80211_internal_bss *bss; - int r; - - while (n) { - bss = rb_entry(n, struct cfg80211_internal_bss, rbn); - r = cmp_bss(&res->pub, &bss->pub); - - if (r == 0) - return bss; - else if (r < 0) - n = n->rb_left; - else - n = n->rb_right; - } - - return NULL; -} - -static struct cfg80211_internal_bss * -rb_find_hidden_bss(struct cfg80211_registered_device *dev, - struct cfg80211_internal_bss *res) -{ - struct rb_node *n = dev->bss_tree.rb_node; - struct cfg80211_internal_bss *bss; - int r; - - while (n) { - bss = rb_entry(n, struct cfg80211_internal_bss, rbn); - r = cmp_hidden_bss(&res->pub, &bss->pub); - - if (r == 0) - return bss; - else if (r < 0) - n = n->rb_left; - else - n = n->rb_right; - } - - return NULL; -} - -static void -copy_hidden_ies(struct cfg80211_internal_bss *res, - struct cfg80211_internal_bss *hidden) -{ - if (unlikely(res->pub.beacon_ies)) - return; - if (WARN_ON(!hidden->pub.beacon_ies)) - return; - - res->pub.beacon_ies = kmalloc(hidden->pub.len_beacon_ies, GFP_ATOMIC); - if (unlikely(!res->pub.beacon_ies)) - return; - - res->beacon_ies_allocated = true; - res->pub.len_beacon_ies = hidden->pub.len_beacon_ies; - memcpy(res->pub.beacon_ies, hidden->pub.beacon_ies, - res->pub.len_beacon_ies); -} - -static struct cfg80211_internal_bss * -cfg80211_bss_update(struct cfg80211_registered_device *dev, - struct cfg80211_internal_bss *res) -{ - struct cfg80211_internal_bss *found = NULL; - - /* - * The reference to "res" is donated to this function. - */ - - if (WARN_ON(!res->pub.channel)) { - kref_put(&res->ref, bss_release); - return NULL; - } - - res->ts = jiffies; - - spin_lock_bh(&dev->bss_lock); - - found = rb_find_bss(dev, res); - - if (found) { - found->pub.beacon_interval = res->pub.beacon_interval; - found->pub.tsf = res->pub.tsf; - found->pub.signal = res->pub.signal; - found->pub.capability = res->pub.capability; - found->ts = res->ts; - - /* Update IEs */ - if (res->pub.proberesp_ies) { - size_t used = dev->wiphy.bss_priv_size + sizeof(*res); - size_t ielen = res->pub.len_proberesp_ies; - -#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,28) - if (0) { - used = 0; /* just to shut up the compiler */ -#else - if (found->pub.proberesp_ies && - !found->proberesp_ies_allocated && - ksize(found) >= used + ielen) { -#endif - memcpy(found->pub.proberesp_ies, - res->pub.proberesp_ies, ielen); - found->pub.len_proberesp_ies = ielen; - } else { - u8 *ies = found->pub.proberesp_ies; - - if (found->proberesp_ies_allocated) - ies = krealloc(ies, ielen, GFP_ATOMIC); - else - ies = kmalloc(ielen, GFP_ATOMIC); - - if (ies) { - memcpy(ies, res->pub.proberesp_ies, - ielen); - found->proberesp_ies_allocated = true; - found->pub.proberesp_ies = ies; - found->pub.len_proberesp_ies = ielen; - } - } - - /* Override possible earlier Beacon frame IEs */ - found->pub.information_elements = - found->pub.proberesp_ies; - found->pub.len_information_elements = - found->pub.len_proberesp_ies; - } - if (res->pub.beacon_ies) { - size_t used = dev->wiphy.bss_priv_size + sizeof(*res); - size_t ielen = res->pub.len_beacon_ies; - bool information_elements_is_beacon_ies = - (found->pub.information_elements == - found->pub.beacon_ies); - -#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,28) - if (0) { - used = 0; /* just to shut up the compiler */ -#else - if (found->pub.beacon_ies && - !found->beacon_ies_allocated && - ksize(found) >= used + ielen) { -#endif - memcpy(found->pub.beacon_ies, - res->pub.beacon_ies, ielen); - found->pub.len_beacon_ies = ielen; - } else { - u8 *ies = found->pub.beacon_ies; - - if (found->beacon_ies_allocated) - ies = krealloc(ies, ielen, GFP_ATOMIC); - else - ies = kmalloc(ielen, GFP_ATOMIC); - - if (ies) { - memcpy(ies, res->pub.beacon_ies, - ielen); - found->beacon_ies_allocated = true; - found->pub.beacon_ies = ies; - found->pub.len_beacon_ies = ielen; - } - } - - /* Override IEs if they were from a beacon before */ - if (information_elements_is_beacon_ies) { - found->pub.information_elements = - found->pub.beacon_ies; - found->pub.len_information_elements = - found->pub.len_beacon_ies; - } - } - - kref_put(&res->ref, bss_release); - } else { - struct cfg80211_internal_bss *hidden; - - /* First check if the beacon is a probe response from - * a hidden bss. If so, copy beacon ies (with nullified - * ssid) into the probe response bss entry (with real ssid). - * It is required basically for PSM implementation - * (probe responses do not contain tim ie) */ - - /* TODO: The code is not trying to update existing probe - * response bss entries when beacon ies are - * getting changed. */ - hidden = rb_find_hidden_bss(dev, res); - if (hidden) - copy_hidden_ies(res, hidden); - - /* this "consumes" the reference */ - list_add_tail(&res->list, &dev->bss_list); - rb_insert_bss(dev, res); - found = res; - } - - dev->bss_generation++; - spin_unlock_bh(&dev->bss_lock); - - kref_get(&found->ref); - return found; -} - -struct cfg80211_bss* -cfg80211_inform_bss(struct wiphy *wiphy, - struct ieee80211_channel *channel, - const u8 *bssid, - u64 timestamp, u16 capability, u16 beacon_interval, - const u8 *ie, size_t ielen, - s32 signal, gfp_t gfp) -{ - struct cfg80211_internal_bss *res; - size_t privsz; - - if (WARN_ON(!wiphy)) - return NULL; - - privsz = wiphy->bss_priv_size; - - if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && - (signal < 0 || signal > 100))) - return NULL; - - res = kzalloc(sizeof(*res) + privsz + ielen, gfp); - if (!res) - return NULL; - - memcpy(res->pub.bssid, bssid, ETH_ALEN); - res->pub.channel = channel; - res->pub.signal = signal; - res->pub.tsf = timestamp; - res->pub.beacon_interval = beacon_interval; - res->pub.capability = capability; - /* - * Since we do not know here whether the IEs are from a Beacon or Probe - * Response frame, we need to pick one of the options and only use it - * with the driver that does not provide the full Beacon/Probe Response - * frame. Use Beacon frame pointer to avoid indicating that this should - * override the information_elements pointer should we have received an - * earlier indication of Probe Response data. - * - * The initial buffer for the IEs is allocated with the BSS entry and - * is located after the private area. - */ - res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz; - memcpy(res->pub.beacon_ies, ie, ielen); - res->pub.len_beacon_ies = ielen; - res->pub.information_elements = res->pub.beacon_ies; - res->pub.len_information_elements = res->pub.len_beacon_ies; - - kref_init(&res->ref); - - res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); - if (!res) - return NULL; - - if (res->pub.capability & WLAN_CAPABILITY_ESS) - regulatory_hint_found_beacon(wiphy, channel, gfp); - - /* cfg80211_bss_update gives us a referenced result */ - return &res->pub; -} -EXPORT_SYMBOL(cfg80211_inform_bss); - -struct cfg80211_bss * -cfg80211_inform_bss_frame(struct wiphy *wiphy, - struct ieee80211_channel *channel, - struct ieee80211_mgmt *mgmt, size_t len, - s32 signal, gfp_t gfp) -{ - struct cfg80211_internal_bss *res; - size_t ielen = len - offsetof(struct ieee80211_mgmt, - u.probe_resp.variable); - size_t privsz; - - if (WARN_ON(!mgmt)) - return NULL; - - if (WARN_ON(!wiphy)) - return NULL; - - if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && - (signal < 0 || signal > 100))) - return NULL; - - if (WARN_ON(len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable))) - return NULL; - - privsz = wiphy->bss_priv_size; - - res = kzalloc(sizeof(*res) + privsz + ielen, gfp); - if (!res) - return NULL; - - memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); - res->pub.channel = channel; - res->pub.signal = signal; - res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); - res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); - res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); - /* - * The initial buffer for the IEs is allocated with the BSS entry and - * is located after the private area. - */ - if (ieee80211_is_probe_resp(mgmt->frame_control)) { - res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz; - memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable, - ielen); - res->pub.len_proberesp_ies = ielen; - res->pub.information_elements = res->pub.proberesp_ies; - res->pub.len_information_elements = res->pub.len_proberesp_ies; - } else { - res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz; - memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen); - res->pub.len_beacon_ies = ielen; - res->pub.information_elements = res->pub.beacon_ies; - res->pub.len_information_elements = res->pub.len_beacon_ies; - } - - kref_init(&res->ref); - - res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); - if (!res) - return NULL; - - if (res->pub.capability & WLAN_CAPABILITY_ESS) - regulatory_hint_found_beacon(wiphy, channel, gfp); - - /* cfg80211_bss_update gives us a referenced result */ - return &res->pub; -} -EXPORT_SYMBOL(cfg80211_inform_bss_frame); - -void cfg80211_put_bss(struct cfg80211_bss *pub) -{ - struct cfg80211_internal_bss *bss; - - if (!pub) - return; - - bss = container_of(pub, struct cfg80211_internal_bss, pub); - kref_put(&bss->ref, bss_release); -} -EXPORT_SYMBOL(cfg80211_put_bss); - -void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) -{ - struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); - struct cfg80211_internal_bss *bss; - - if (WARN_ON(!pub)) - return; - - bss = container_of(pub, struct cfg80211_internal_bss, pub); - - spin_lock_bh(&dev->bss_lock); - if (!list_empty(&bss->list)) { - __cfg80211_unlink_bss(dev, bss); - dev->bss_generation++; - } - spin_unlock_bh(&dev->bss_lock); -} -EXPORT_SYMBOL(cfg80211_unlink_bss); - -void cfg80211_unlink_allbss(struct wiphy *wiphy) -{ - struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); - - printk("%s() Enter - steven", __func__); - - spin_lock_bh(&dev->bss_lock); - cfg80211_bss_expire_all(dev); - spin_unlock_bh(&dev->bss_lock); -} -EXPORT_SYMBOL(cfg80211_unlink_allbss); - -#ifdef CONFIG_CFG80211_WEXT -int cfg80211_wext_siwscan(struct net_device *dev, - struct iw_request_info *info, - union iwreq_data *wrqu, char *extra) -{ - struct cfg80211_registered_device *rdev; - struct wiphy *wiphy; - struct iw_scan_req *wreq = NULL; - struct cfg80211_scan_request *creq = NULL; - int i, err, n_channels = 0; - enum ieee80211_band band; - - if (!netif_running(dev)) - return -ENETDOWN; - - if (wrqu->data.length == sizeof(struct iw_scan_req)) - wreq = (struct iw_scan_req *)extra; - - rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); - - if (IS_ERR(rdev)) - return PTR_ERR(rdev); - - if (rdev->scan_req) { - err = -EBUSY; - goto out; - } - - wiphy = &rdev->wiphy; - - /* Determine number of channels, needed to allocate creq */ - if (wreq && wreq->num_channels) - n_channels = wreq->num_channels; - else { - for (band = 0; band < IEEE80211_NUM_BANDS; band++) - if (wiphy->bands[band]) - n_channels += wiphy->bands[band]->n_channels; - } - - creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + - n_channels * sizeof(void *), - GFP_ATOMIC); - if (!creq) { - err = -ENOMEM; - goto out; - } - - creq->wiphy = wiphy; - creq->dev = dev; - /* SSIDs come after channels */ - creq->ssids = (void *)&creq->channels[n_channels]; - creq->n_channels = n_channels; - creq->n_ssids = 1; - - /* translate "Scan on frequencies" request */ - i = 0; - for (band = 0; band < IEEE80211_NUM_BANDS; band++) { - int j; - - if (!wiphy->bands[band]) - continue; - - for (j = 0; j < wiphy->bands[band]->n_channels; j++) { - /* ignore disabled channels */ - if (wiphy->bands[band]->channels[j].flags & - IEEE80211_CHAN_DISABLED) - continue; - - /* If we have a wireless request structure and the - * wireless request specifies frequencies, then search - * for the matching hardware channel. - */ - if (wreq && wreq->num_channels) { - int k; - int wiphy_freq = wiphy->bands[band]->channels[j].center_freq; - for (k = 0; k < wreq->num_channels; k++) { - int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]); - if (wext_freq == wiphy_freq) - goto wext_freq_found; - } - goto wext_freq_not_found; - } - - wext_freq_found: - creq->channels[i] = &wiphy->bands[band]->channels[j]; - i++; - wext_freq_not_found: ; - } - } - /* No channels found? */ - if (!i) { - err = -EINVAL; - goto out; - } - - /* Set real number of channels specified in creq->channels[] */ - creq->n_channels = i; - - /* translate "Scan for SSID" request */ - if (wreq) { - if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { - if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) { - err = -EINVAL; - goto out; - } - memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); - creq->ssids[0].ssid_len = wreq->essid_len; - } - if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) - creq->n_ssids = 0; - } - - for (i = 0; i < IEEE80211_NUM_BANDS; i++) - if (wiphy->bands[i]) - creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1; - - rdev->scan_req = creq; - err = rdev->ops->scan(wiphy, dev, creq); - if (err) { - rdev->scan_req = NULL; - /* creq will be freed below */ - } else { - nl80211_send_scan_start(rdev, dev); - /* creq now owned by driver */ - creq = NULL; - dev_hold(dev); - } - out: - kfree(creq); - cfg80211_unlock_rdev(rdev); - return err; -} -EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan); - -static void ieee80211_scan_add_ies(struct iw_request_info *info, - struct cfg80211_bss *bss, - char **current_ev, char *end_buf) -{ - u8 *pos, *end, *next; - struct iw_event iwe; - - if (!bss->information_elements || - !bss->len_information_elements) - return; - - /* - * If needed, fragment the IEs buffer (at IE boundaries) into short - * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. - */ - pos = bss->information_elements; - end = pos + bss->len_information_elements; - - while (end - pos > IW_GENERIC_IE_MAX) { - next = pos + 2 + pos[1]; - while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) - next = next + 2 + next[1]; - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = next - pos; - *current_ev = iwe_stream_add_point(info, *current_ev, - end_buf, &iwe, pos); - - pos = next; - } - - if (end > pos) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVGENIE; - iwe.u.data.length = end - pos; - *current_ev = iwe_stream_add_point(info, *current_ev, - end_buf, &iwe, pos); - } -} - -static inline unsigned int elapsed_jiffies_msecs(unsigned long start) -{ - unsigned long end = jiffies; - - if (end >= start) - return jiffies_to_msecs(end - start); - - return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); -} - -static char * -ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, - struct cfg80211_internal_bss *bss, char *current_ev, - char *end_buf) -{ - struct iw_event iwe; - u8 *buf, *cfg, *p; - u8 *ie = bss->pub.information_elements; - int rem = bss->pub.len_information_elements, i, sig; - bool ismesh = false; - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWAP; - iwe.u.ap_addr.sa_family = ARPHRD_ETHER; - memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); - current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, - IW_EV_ADDR_LEN); - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWFREQ; - iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); - iwe.u.freq.e = 0; - current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, - IW_EV_FREQ_LEN); - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWFREQ; - iwe.u.freq.m = bss->pub.channel->center_freq; - iwe.u.freq.e = 6; - current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, - IW_EV_FREQ_LEN); - - if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVQUAL; - iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | - IW_QUAL_NOISE_INVALID | - IW_QUAL_QUAL_UPDATED; - switch (wiphy->signal_type) { - case CFG80211_SIGNAL_TYPE_MBM: - sig = bss->pub.signal / 100; - iwe.u.qual.level = sig; - iwe.u.qual.updated |= IW_QUAL_DBM; - if (sig < -110) /* rather bad */ - sig = -110; - else if (sig > -40) /* perfect */ - sig = -40; - /* will give a range of 0 .. 70 */ - iwe.u.qual.qual = sig + 110; - break; - case CFG80211_SIGNAL_TYPE_UNSPEC: - iwe.u.qual.level = bss->pub.signal; - /* will give range 0 .. 100 */ - iwe.u.qual.qual = bss->pub.signal; - break; - default: - /* not reached */ - break; - } - current_ev = iwe_stream_add_event(info, current_ev, end_buf, - &iwe, IW_EV_QUAL_LEN); - } - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWENCODE; - if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) - iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; - else - iwe.u.data.flags = IW_ENCODE_DISABLED; - iwe.u.data.length = 0; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, ""); - - while (rem >= 2) { - /* invalid data */ - if (ie[1] > rem - 2) - break; - - switch (ie[0]) { - case WLAN_EID_SSID: - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWESSID; - iwe.u.data.length = ie[1]; - iwe.u.data.flags = 1; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, ie + 2); - break; - case WLAN_EID_MESH_ID: - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWESSID; - iwe.u.data.length = ie[1]; - iwe.u.data.flags = 1; - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, ie + 2); - break; - case WLAN_EID_MESH_CONFIG: - ismesh = true; - if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) - break; - buf = kmalloc(50, GFP_ATOMIC); - if (!buf) - break; - cfg = ie + 2; - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVCUSTOM; - sprintf(buf, "Mesh Network Path Selection Protocol ID: " - "0x%02X", cfg[0]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Path Selection Metric ID: 0x%02X", - cfg[1]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Congestion Control Mode ID: 0x%02X", - cfg[2]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Authentication ID: 0x%02X", cfg[4]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Formation Info: 0x%02X", cfg[5]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - sprintf(buf, "Capabilities: 0x%02X", cfg[6]); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, - &iwe, buf); - kfree(buf); - break; - case WLAN_EID_SUPP_RATES: - case WLAN_EID_EXT_SUPP_RATES: - /* display all supported rates in readable format */ - p = current_ev + iwe_stream_lcp_len(info); - - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWRATE; - /* Those two flags are ignored... */ - iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; - - for (i = 0; i < ie[1]; i++) { - iwe.u.bitrate.value = - ((ie[i + 2] & 0x7f) * 500000); - p = iwe_stream_add_value(info, current_ev, p, - end_buf, &iwe, IW_EV_PARAM_LEN); - } - current_ev = p; - break; - } - rem -= ie[1] + 2; - ie += ie[1] + 2; - } - - if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) || - ismesh) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = SIOCGIWMODE; - if (ismesh) - iwe.u.mode = IW_MODE_MESH; - else if (bss->pub.capability & WLAN_CAPABILITY_ESS) - iwe.u.mode = IW_MODE_MASTER; - else - iwe.u.mode = IW_MODE_ADHOC; - current_ev = iwe_stream_add_event(info, current_ev, end_buf, - &iwe, IW_EV_UINT_LEN); - } - - buf = kmalloc(30, GFP_ATOMIC); - if (buf) { - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVCUSTOM; - sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf)); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, end_buf, - &iwe, buf); - memset(&iwe, 0, sizeof(iwe)); - iwe.cmd = IWEVCUSTOM; - sprintf(buf, " Last beacon: %ums ago", - elapsed_jiffies_msecs(bss->ts)); - iwe.u.data.length = strlen(buf); - current_ev = iwe_stream_add_point(info, current_ev, - end_buf, &iwe, buf); - kfree(buf); - } - - ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf); - - return current_ev; -} - - -static int ieee80211_scan_results(struct cfg80211_registered_device *dev, - struct iw_request_info *info, - char *buf, size_t len) -{ - char *current_ev = buf; - char *end_buf = buf + len; - struct cfg80211_internal_bss *bss; - - spin_lock_bh(&dev->bss_lock); - cfg80211_bss_expire(dev); - - list_for_each_entry(bss, &dev->bss_list, list) { - if (buf + len - current_ev <= IW_EV_ADDR_LEN) { - spin_unlock_bh(&dev->bss_lock); - return -E2BIG; - } - current_ev = ieee80211_bss(&dev->wiphy, info, bss, - current_ev, end_buf); - } - spin_unlock_bh(&dev->bss_lock); - return current_ev - buf; -} - - -int cfg80211_wext_giwscan(struct net_device *dev, - struct iw_request_info *info, - struct iw_point *data, char *extra) -{ - struct cfg80211_registered_device *rdev; - int res; - - if (!netif_running(dev)) - return -ENETDOWN; - - rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); - - if (IS_ERR(rdev)) - return PTR_ERR(rdev); - - if (rdev->scan_req) { - res = -EAGAIN; - goto out; - } - - res = ieee80211_scan_results(rdev, info, extra, data->length); - data->length = 0; - if (res >= 0) { - data->length = res; - res = 0; - } - - out: - cfg80211_unlock_rdev(rdev); - return res; -} -EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan); -#endif |