#include <net/iw_handler.h>
#include "core.h"
#include "nl80211.h"
+#include "wext-compat.h"
-#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
+#define IEEE80211_SCAN_RESULT_EXPIRE (15 * HZ)
-void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted)
+void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak)
{
+ struct cfg80211_scan_request *request;
struct net_device *dev;
-#ifdef CONFIG_WIRELESS_EXT
+#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
- dev = dev_get_by_index(&init_net, request->ifidx);
- if (!dev)
- goto out;
+ ASSERT_RDEV_LOCK(rdev);
- WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req);
- wiphy_to_dev(request->wiphy)->scan_req = NULL;
+ request = rdev->scan_req;
+
+ if (!request)
+ return;
+
+ dev = request->dev;
- if (aborted)
- nl80211_send_scan_aborted(wiphy_to_dev(request->wiphy), 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(wiphy_to_dev(request->wiphy), dev);
+ nl80211_send_scan_done(rdev, dev);
-#ifdef CONFIG_WIRELESS_EXT
- if (!aborted) {
+#ifdef CONFIG_CFG80211_WEXT
+ if (!request->aborted) {
memset(&wrqu, 0, sizeof(wrqu));
wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
dev_put(dev);
- out:
- kfree(request);
+ 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);
if (bss->pub.free_priv)
bss->pub.free_priv(&bss->pub);
- if (bss->ies_allocated)
- kfree(bss->pub.information_elements);
+ 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);
}
bool expired = false;
list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) {
- if (bss->hold ||
- !time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE))
+ if (atomic_read(&bss->hold))
+ continue;
+ if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE))
continue;
list_del(&bss->list);
rb_erase(&bss->rbn, &dev->bss_tree);
dev->bss_generation++;
}
-static u8 *find_ie(u8 num, u8 *ies, size_t len)
+const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len)
{
- while (len > 2 && ies[0] != num) {
+ while (len > 2 && ies[0] != eid) {
len -= ies[1] + 2;
ies += ies[1] + 2;
}
return NULL;
return ies;
}
+EXPORT_SYMBOL(cfg80211_find_ie);
static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2)
{
- const u8 *ie1 = find_ie(num, ies1, len1);
- const u8 *ie2 = find_ie(num, ies2, len2);
+ const u8 *ie1 = cfg80211_find_ie(num, ies1, len1);
+ const u8 *ie2 = cfg80211_find_ie(num, ies2, len2);
int r;
if (!ie1 && !ie2)
return 0;
- if (!ie1)
+ if (!ie1 || !ie2)
return -1;
r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1]));
if (!ssid)
return true;
- ssidie = find_ie(WLAN_EID_SSID,
- a->information_elements,
- a->len_information_elements);
+ ssidie = cfg80211_find_ie(WLAN_EID_SSID,
+ a->information_elements,
+ a->len_information_elements);
if (!ssidie)
return false;
if (ssidie[1] != ssid_len)
if (!is_zero_ether_addr(a->bssid))
return false;
- ie = find_ie(WLAN_EID_MESH_ID,
- a->information_elements,
- a->len_information_elements);
+ ie = cfg80211_find_ie(WLAN_EID_MESH_ID,
+ a->information_elements,
+ a->len_information_elements);
if (!ie)
return false;
if (ie[1] != meshidlen)
if (memcmp(ie + 2, meshid, meshidlen))
return false;
- ie = find_ie(WLAN_EID_MESH_CONFIG,
- a->information_elements,
- a->len_information_elements);
- if (ie[1] != IEEE80211_MESH_CONFIG_LEN)
+ 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;
/*
* comparing since that may differ between stations taking
* part in the same mesh.
*/
- return memcmp(ie + 2, meshcfg, IEEE80211_MESH_CONFIG_LEN - 2) == 0;
+ return memcmp(ie + 2, meshcfg,
+ sizeof(struct ieee80211_meshconf_ie) - 2) == 0;
}
static int cmp_bss(struct cfg80211_bss *a,
static struct cfg80211_internal_bss *
cfg80211_bss_update(struct cfg80211_registered_device *dev,
- struct cfg80211_internal_bss *res,
- bool overwrite)
+ struct cfg80211_internal_bss *res)
{
struct cfg80211_internal_bss *found = NULL;
const u8 *meshid, *meshcfg;
if (is_zero_ether_addr(res->pub.bssid)) {
/* must be mesh, verify */
- meshid = find_ie(WLAN_EID_MESH_ID, res->pub.information_elements,
- res->pub.len_information_elements);
- meshcfg = find_ie(WLAN_EID_MESH_CONFIG,
- res->pub.information_elements,
- res->pub.len_information_elements);
+ meshid = cfg80211_find_ie(WLAN_EID_MESH_ID,
+ res->pub.information_elements,
+ res->pub.len_information_elements);
+ meshcfg = cfg80211_find_ie(WLAN_EID_MESH_CONFIG,
+ res->pub.information_elements,
+ res->pub.len_information_elements);
if (!meshid || !meshcfg ||
- meshcfg[1] != IEEE80211_MESH_CONFIG_LEN) {
+ meshcfg[1] != sizeof(struct ieee80211_meshconf_ie)) {
/* bogus mesh */
kref_put(&res->ref, bss_release);
return NULL;
found = rb_find_bss(dev, res);
if (found) {
- kref_get(&found->ref);
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;
- /* overwrite IEs */
- if (overwrite) {
+ /* Update IEs */
+ if (res->pub.proberesp_ies) {
size_t used = dev->wiphy.bss_priv_size + sizeof(*res);
- size_t ielen = res->pub.len_information_elements;
+ size_t ielen = res->pub.len_proberesp_ies;
+
+ if (found->pub.proberesp_ies &&
+ !found->proberesp_ies_allocated &&
+ ksize(found) >= used + ielen) {
+ 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;
+ }
+ }
- if (ksize(found) >= used + ielen) {
- memcpy(found->pub.information_elements,
- res->pub.information_elements, ielen);
- found->pub.len_information_elements = 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;
+
+ if (found->pub.beacon_ies &&
+ !found->beacon_ies_allocated &&
+ ksize(found) >= used + ielen) {
+ memcpy(found->pub.beacon_ies,
+ res->pub.beacon_ies, ielen);
+ found->pub.len_beacon_ies = ielen;
} else {
- u8 *ies = found->pub.information_elements;
+ u8 *ies = found->pub.beacon_ies;
- if (found->ies_allocated)
+ if (found->beacon_ies_allocated)
ies = krealloc(ies, ielen, GFP_ATOMIC);
else
ies = kmalloc(ielen, GFP_ATOMIC);
if (ies) {
- memcpy(ies, res->pub.information_elements, ielen);
- found->ies_allocated = true;
- found->pub.information_elements = ies;
+ memcpy(ies, res->pub.beacon_ies,
+ ielen);
+ found->beacon_ies_allocated = true;
+ found->pub.beacon_ies = ies;
+ found->pub.len_beacon_ies = ielen;
}
}
}
res->pub.tsf = timestamp;
res->pub.beacon_interval = beacon_interval;
res->pub.capability = capability;
- /* point to after the private area */
- res->pub.information_elements = (u8 *)res + sizeof(*res) + privsz;
- memcpy(res->pub.information_elements, ie, ielen);
- res->pub.len_information_elements = ielen;
+ /*
+ * 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, 0);
+ res = cfg80211_bss_update(wiphy_to_dev(wiphy), res);
if (!res)
return NULL;
struct cfg80211_internal_bss *res;
size_t ielen = len - offsetof(struct ieee80211_mgmt,
u.probe_resp.variable);
- bool overwrite;
size_t privsz = wiphy->bss_priv_size;
if (WARN_ON(wiphy->signal_type == NL80211_BSS_SIGNAL_UNSPEC &&
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);
- /* point to after the private area */
- res->pub.information_elements = (u8 *)res + sizeof(*res) + privsz;
- memcpy(res->pub.information_elements, mgmt->u.probe_resp.variable, ielen);
- res->pub.len_information_elements = ielen;
+ /*
+ * 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);
- overwrite = ieee80211_is_probe_resp(mgmt->frame_control);
-
- res = cfg80211_bss_update(wiphy_to_dev(wiphy), res, overwrite);
+ res = cfg80211_bss_update(wiphy_to_dev(wiphy), res);
if (!res)
return NULL;
spin_lock_bh(&dev->bss_lock);
list_del(&bss->list);
+ dev->bss_generation++;
rb_erase(&bss->rbn, &dev->bss_tree);
spin_unlock_bh(&dev->bss_lock);
}
EXPORT_SYMBOL(cfg80211_unlink_bss);
-void cfg80211_hold_bss(struct cfg80211_bss *pub)
-{
- struct cfg80211_internal_bss *bss;
-
- if (!pub)
- return;
-
- bss = container_of(pub, struct cfg80211_internal_bss, pub);
- bss->hold = true;
-}
-EXPORT_SYMBOL(cfg80211_hold_bss);
-
-void cfg80211_unhold_bss(struct cfg80211_bss *pub)
-{
- struct cfg80211_internal_bss *bss;
-
- if (!pub)
- return;
-
- bss = container_of(pub, struct cfg80211_internal_bss, pub);
- bss->hold = false;
-}
-EXPORT_SYMBOL(cfg80211_unhold_bss);
-
-#ifdef CONFIG_WIRELESS_EXT
+#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;
+ struct cfg80211_scan_request *creq = NULL;
int i, err, n_channels = 0;
enum ieee80211_band band;
if (!netif_running(dev))
return -ENETDOWN;
- rdev = cfg80211_get_dev_from_ifindex(dev->ifindex);
+ 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);
wiphy = &rdev->wiphy;
- for (band = 0; band < IEEE80211_NUM_BANDS; band++)
- if (wiphy->bands[band])
- n_channels += wiphy->bands[band]->n_channels;
+ /* 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 *),
}
creq->wiphy = wiphy;
- creq->ifidx = dev->ifindex;
- creq->ssids = (void *)(creq + 1);
- creq->channels = (void *)(creq->ssids + 1);
+ creq->dev = dev;
+ /* SSIDs come after channels */
+ creq->ssids = (void *)&creq->channels[n_channels];
creq->n_channels = n_channels;
creq->n_ssids = 1;
- /* all channels */
+ /* 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;
+ }
- /* translate scan request */
- if (wrqu->data.length == sizeof(struct iw_scan_req)) {
- wreq = (struct iw_scan_req *)extra;
+ /* 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)
- return -EINVAL;
+ 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;
}
err = rdev->ops->scan(wiphy, dev, creq);
if (err) {
rdev->scan_req = NULL;
- kfree(creq);
+ /* creq will be freed below */
+ } else {
+ nl80211_send_scan_start(rdev, dev);
+ /* creq now owned by driver */
+ creq = NULL;
+ dev_hold(dev);
}
out:
- cfg80211_put_dev(rdev);
+ kfree(creq);
+ cfg80211_unlock_rdev(rdev);
return err;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan);
break;
case WLAN_EID_MESH_CONFIG:
ismesh = true;
- if (ie[1] != IEEE80211_MESH_CONFIG_LEN)
+ if (ie[1] != sizeof(struct ieee80211_meshconf_ie))
break;
buf = kmalloc(50, GFP_ATOMIC);
if (!buf)
cfg = ie + 2;
memset(&iwe, 0, sizeof(iwe));
iwe.cmd = IWEVCUSTOM;
- sprintf(buf, "Mesh network (version %d)", cfg[0]);
+ 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, "Path Selection Protocol ID: "
- "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
- cfg[4]);
+ 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, "Path Selection Metric ID: "
- "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
- cfg[8]);
+ 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, "Congestion Control Mode ID: "
- "0x%02X%02X%02X%02X", cfg[9], cfg[10],
- cfg[11], cfg[12]);
+ 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, "Channel Precedence: "
- "0x%02X%02X%02X%02X", cfg[13], cfg[14],
- cfg[15], cfg[16]);
+ sprintf(buf, "Capabilities: 0x%02X", cfg[6]);
iwe.u.data.length = strlen(buf);
current_ev = iwe_stream_add_point(info, current_ev,
end_buf,
ie += ie[1] + 2;
}
- if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
- || ismesh) {
+ if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) ||
+ ismesh) {
memset(&iwe, 0, sizeof(iwe));
iwe.cmd = SIOCGIWMODE;
if (ismesh)
if (!netif_running(dev))
return -ENETDOWN;
- rdev = cfg80211_get_dev_from_ifindex(dev->ifindex);
+ rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex);
if (IS_ERR(rdev))
return PTR_ERR(rdev);
}
out:
- cfg80211_put_dev(rdev);
+ cfg80211_unlock_rdev(rdev);
return res;
}
EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff