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@@ -0,0 +1,807 @@
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+/*
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+ * cfg80211 scan result handling
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+ *
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+ * Copyright 2008 Johannes Berg <johannes@sipsolutions.net>
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+ */
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/netdevice.h>
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+#include <linux/wireless.h>
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+#include <linux/nl80211.h>
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+#include <linux/etherdevice.h>
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+#include <net/arp.h>
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+#include <net/cfg80211.h>
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+#include <net/iw_handler.h>
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+#include "core.h"
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+#include "nl80211.h"
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+
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+#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
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+
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+void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted)
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+{
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+ struct net_device *dev;
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+#ifdef CONFIG_WIRELESS_EXT
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+ union iwreq_data wrqu;
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+#endif
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+
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+ dev = dev_get_by_index(&init_net, request->ifidx);
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+ if (!dev)
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+ goto out;
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+
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+ WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req);
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+ wiphy_to_dev(request->wiphy)->scan_req = NULL;
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+
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+ if (aborted)
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+ nl80211_send_scan_aborted(wiphy_to_dev(request->wiphy), dev);
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+ else
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+ nl80211_send_scan_done(wiphy_to_dev(request->wiphy), dev);
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+
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+#ifdef CONFIG_WIRELESS_EXT
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+ if (!aborted) {
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+ memset(&wrqu, 0, sizeof(wrqu));
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+
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+ wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
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+ }
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+#endif
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+
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+ dev_put(dev);
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+
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+ out:
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+ kfree(request);
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+}
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+EXPORT_SYMBOL(cfg80211_scan_done);
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+
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+static void bss_release(struct kref *ref)
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+{
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+ struct cfg80211_internal_bss *bss;
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+
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+ bss = container_of(ref, struct cfg80211_internal_bss, ref);
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+ kfree(bss);
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+}
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+
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+/* must hold dev->bss_lock! */
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+void cfg80211_bss_expire(struct cfg80211_registered_device *dev)
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+{
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+ struct cfg80211_internal_bss *bss, *tmp;
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+ bool expired = false;
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+
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+ list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) {
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+ if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE))
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+ continue;
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+ list_del(&bss->list);
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+ rb_erase(&bss->rbn, &dev->bss_tree);
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+ kref_put(&bss->ref, bss_release);
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+ expired = true;
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+ }
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+
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+ if (expired)
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+ dev->bss_generation++;
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+}
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+
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+static u8 *find_ie(u8 num, u8 *ies, size_t len)
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+{
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+ while (len > 2 && ies[0] != num) {
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+ len -= ies[1] + 2;
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+ ies += ies[1] + 2;
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+ }
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+ if (len < 2)
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+ return NULL;
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+ if (len < 2 + ies[1])
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+ return NULL;
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+ return ies;
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+}
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+
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+static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2)
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+{
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+ const u8 *ie1 = find_ie(num, ies1, len1);
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+ const u8 *ie2 = find_ie(num, ies2, len2);
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+ int r;
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+
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+ if (!ie1 && !ie2)
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+ return 0;
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+ if (!ie1)
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+ return -1;
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+
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+ r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1]));
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+ if (r == 0 && ie1[1] != ie2[1])
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+ return ie2[1] - ie1[1];
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+ return r;
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+}
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+
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+static bool is_bss(struct cfg80211_bss *a,
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+ const u8 *bssid,
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+ const u8 *ssid, size_t ssid_len)
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+{
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+ const u8 *ssidie;
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+
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+ if (compare_ether_addr(a->bssid, bssid))
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+ return false;
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+
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+ ssidie = find_ie(WLAN_EID_SSID,
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+ a->information_elements,
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+ a->len_information_elements);
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+ if (!ssidie)
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+ return false;
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+ if (ssidie[1] != ssid_len)
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+ return false;
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+ return memcmp(ssidie + 2, ssid, ssid_len) == 0;
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+}
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+
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+static bool is_mesh(struct cfg80211_bss *a,
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+ const u8 *meshid, size_t meshidlen,
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+ const u8 *meshcfg)
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+{
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+ const u8 *ie;
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+
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+ if (!is_zero_ether_addr(a->bssid))
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+ return false;
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+
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+ ie = find_ie(WLAN_EID_MESH_ID,
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+ a->information_elements,
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+ a->len_information_elements);
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+ if (!ie)
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+ return false;
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+ if (ie[1] != meshidlen)
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+ return false;
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+ if (memcmp(ie + 2, meshid, meshidlen))
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+ return false;
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+
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+ ie = find_ie(WLAN_EID_MESH_CONFIG,
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+ a->information_elements,
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+ a->len_information_elements);
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+ if (ie[1] != IEEE80211_MESH_CONFIG_LEN)
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+ return false;
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+
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+ /*
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+ * Ignore mesh capability (last two bytes of the IE) when
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+ * comparing since that may differ between stations taking
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+ * part in the same mesh.
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+ */
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+ return memcmp(ie + 2, meshcfg, IEEE80211_MESH_CONFIG_LEN - 2) == 0;
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+}
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+
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+static int cmp_bss(struct cfg80211_bss *a,
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+ struct cfg80211_bss *b)
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+{
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+ int r;
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+
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+ if (a->channel != b->channel)
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+ return b->channel->center_freq - a->channel->center_freq;
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+
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+ r = memcmp(a->bssid, b->bssid, ETH_ALEN);
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+ if (r)
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+ return r;
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+
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+ if (is_zero_ether_addr(a->bssid)) {
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+ r = cmp_ies(WLAN_EID_MESH_ID,
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+ a->information_elements,
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+ a->len_information_elements,
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+ b->information_elements,
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+ b->len_information_elements);
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+ if (r)
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+ return r;
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+ return cmp_ies(WLAN_EID_MESH_CONFIG,
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+ a->information_elements,
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+ a->len_information_elements,
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+ b->information_elements,
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+ b->len_information_elements);
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+ }
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+
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+ return cmp_ies(WLAN_EID_SSID,
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+ a->information_elements,
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+ a->len_information_elements,
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+ b->information_elements,
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+ b->len_information_elements);
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+}
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+
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+struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
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+ struct ieee80211_channel *channel,
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+ const u8 *bssid,
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+ const u8 *ssid, size_t ssid_len)
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+{
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+ struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
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+ struct cfg80211_internal_bss *bss, *res = NULL;
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+
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+ spin_lock_bh(&dev->bss_lock);
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+
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+ list_for_each_entry(bss, &dev->bss_list, list) {
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+ if (channel && bss->pub.channel != channel)
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+ continue;
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+ if (is_bss(&bss->pub, bssid, ssid, ssid_len)) {
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+ res = bss;
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+ kref_get(&res->ref);
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+ break;
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+ }
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+ }
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+
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+ spin_unlock_bh(&dev->bss_lock);
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+ if (!res)
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+ return NULL;
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+ return &res->pub;
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+}
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+EXPORT_SYMBOL(cfg80211_get_bss);
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+
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+struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy,
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+ struct ieee80211_channel *channel,
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+ const u8 *meshid, size_t meshidlen,
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+ const u8 *meshcfg)
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+{
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+ struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
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+ struct cfg80211_internal_bss *bss, *res = NULL;
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+
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+ spin_lock_bh(&dev->bss_lock);
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+
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+ list_for_each_entry(bss, &dev->bss_list, list) {
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+ if (channel && bss->pub.channel != channel)
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+ continue;
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+ if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) {
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+ res = bss;
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+ kref_get(&res->ref);
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+ break;
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+ }
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+ }
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+
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+ spin_unlock_bh(&dev->bss_lock);
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+ if (!res)
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+ return NULL;
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+ return &res->pub;
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+}
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+EXPORT_SYMBOL(cfg80211_get_mesh);
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+
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+
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+static void rb_insert_bss(struct cfg80211_registered_device *dev,
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+ struct cfg80211_internal_bss *bss)
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+{
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+ struct rb_node **p = &dev->bss_tree.rb_node;
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+ struct rb_node *parent = NULL;
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+ struct cfg80211_internal_bss *tbss;
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+ int cmp;
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+
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+ while (*p) {
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+ parent = *p;
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+ tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn);
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+
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+ cmp = cmp_bss(&bss->pub, &tbss->pub);
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+
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+ if (WARN_ON(!cmp)) {
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+ /* will sort of leak this BSS */
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+ return;
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+ }
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+
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+ if (cmp < 0)
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+ p = &(*p)->rb_left;
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+ else
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+ p = &(*p)->rb_right;
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+ }
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+
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+ rb_link_node(&bss->rbn, parent, p);
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+ rb_insert_color(&bss->rbn, &dev->bss_tree);
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+}
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+
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+static struct cfg80211_internal_bss *
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+rb_find_bss(struct cfg80211_registered_device *dev,
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+ struct cfg80211_internal_bss *res)
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+{
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+ struct rb_node *n = dev->bss_tree.rb_node;
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+ struct cfg80211_internal_bss *bss;
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+ int r;
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+
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+ while (n) {
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+ bss = rb_entry(n, struct cfg80211_internal_bss, rbn);
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+ r = cmp_bss(&res->pub, &bss->pub);
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+
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+ if (r == 0)
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+ return bss;
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+ else if (r < 0)
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+ n = n->rb_left;
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+ else
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+ n = n->rb_right;
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+ }
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+
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+ return NULL;
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+}
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+
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+static struct cfg80211_internal_bss *
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+cfg80211_bss_update(struct cfg80211_registered_device *dev,
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+ struct cfg80211_internal_bss *res,
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+ bool overwrite)
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+{
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+ struct cfg80211_internal_bss *found = NULL;
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+ const u8 *meshid, *meshcfg;
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+
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+ /*
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+ * The reference to "res" is donated to this function.
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+ */
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+
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+ if (WARN_ON(!res->pub.channel)) {
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+ kref_put(&res->ref, bss_release);
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+ return NULL;
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+ }
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+
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+ res->ts = jiffies;
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+
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+ if (is_zero_ether_addr(res->pub.bssid)) {
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+ /* must be mesh, verify */
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+ meshid = find_ie(WLAN_EID_MESH_ID, res->pub.information_elements,
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+ res->pub.len_information_elements);
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+ meshcfg = find_ie(WLAN_EID_MESH_CONFIG,
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+ res->pub.information_elements,
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+ res->pub.len_information_elements);
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+ if (!meshid || !meshcfg ||
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+ meshcfg[1] != IEEE80211_MESH_CONFIG_LEN) {
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+ /* bogus mesh */
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+ kref_put(&res->ref, bss_release);
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+ return NULL;
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+ }
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+ }
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+
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+ spin_lock_bh(&dev->bss_lock);
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+
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+ found = rb_find_bss(dev, res);
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+
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+ if (found && overwrite) {
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+ list_replace(&found->list, &res->list);
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+ rb_replace_node(&found->rbn, &res->rbn,
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+ &dev->bss_tree);
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+ kref_put(&found->ref, bss_release);
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+ found = res;
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+ } else if (found) {
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+ kref_get(&found->ref);
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+ found->pub.beacon_interval = res->pub.beacon_interval;
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+ found->pub.tsf = res->pub.tsf;
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+ found->pub.signal = res->pub.signal;
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+ found->pub.signal_type = res->pub.signal_type;
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+ found->pub.capability = res->pub.capability;
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+ found->ts = res->ts;
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+ kref_put(&res->ref, bss_release);
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+ } else {
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+ /* this "consumes" the reference */
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+ list_add_tail(&res->list, &dev->bss_list);
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+ rb_insert_bss(dev, res);
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+ found = res;
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+ }
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+
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+ dev->bss_generation++;
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+ spin_unlock_bh(&dev->bss_lock);
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+
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+ kref_get(&found->ref);
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+ return found;
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+}
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+
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+struct cfg80211_bss *
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+cfg80211_inform_bss_frame(struct wiphy *wiphy,
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+ struct ieee80211_channel *channel,
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+ struct ieee80211_mgmt *mgmt, size_t len,
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+ s32 signal, enum cfg80211_signal_type sigtype,
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+ gfp_t gfp)
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+{
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+ struct cfg80211_internal_bss *res;
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+ size_t ielen = len - offsetof(struct ieee80211_mgmt,
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+ u.probe_resp.variable);
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+ bool overwrite;
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+ size_t privsz = wiphy->bss_priv_size;
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+
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+ if (WARN_ON(sigtype == NL80211_BSS_SIGNAL_UNSPEC &&
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+ (signal < 0 || signal > 100)))
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+ return NULL;
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+
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+ if (WARN_ON(!mgmt || !wiphy ||
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+ len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable)))
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+ return NULL;
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+
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+ res = kzalloc(sizeof(*res) + privsz + ielen, gfp);
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+ if (!res)
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+ return NULL;
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+
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+ memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN);
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+ res->pub.channel = channel;
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+ res->pub.signal_type = sigtype;
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+ res->pub.signal = signal;
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+ res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp);
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+ res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int);
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+ res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info);
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+ /* point to after the private area */
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+ res->pub.information_elements = (u8 *)res + sizeof(*res) + privsz;
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+ memcpy(res->pub.information_elements, mgmt->u.probe_resp.variable, ielen);
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+ res->pub.len_information_elements = ielen;
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|
+
|
|
|
+ kref_init(&res->ref);
|
|
|
+
|
|
|
+ overwrite = ieee80211_is_probe_resp(mgmt->frame_control);
|
|
|
+
|
|
|
+ res = cfg80211_bss_update(wiphy_to_dev(wiphy), res, overwrite);
|
|
|
+ if (!res)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ /* 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);
|
|
|
+
|
|
|
+#ifdef CONFIG_WIRELESS_EXT
|
|
|
+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;
|
|
|
+ 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 (IS_ERR(rdev))
|
|
|
+ return PTR_ERR(rdev);
|
|
|
+
|
|
|
+ if (rdev->scan_req) {
|
|
|
+ err = -EBUSY;
|
|
|
+ goto out;
|
|
|
+ }
|
|
|
+
|
|
|
+ wiphy = &rdev->wiphy;
|
|
|
+
|
|
|
+ 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->ifidx = dev->ifindex;
|
|
|
+ creq->ssids = (void *)(creq + 1);
|
|
|
+ creq->channels = (void *)(creq->ssids + 1);
|
|
|
+ creq->n_channels = n_channels;
|
|
|
+ creq->n_ssids = 1;
|
|
|
+
|
|
|
+ /* all channels */
|
|
|
+ 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++) {
|
|
|
+ creq->channels[i] = &wiphy->bands[band]->channels[j];
|
|
|
+ i++;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* translate scan request */
|
|
|
+ if (wrqu->data.length == sizeof(struct iw_scan_req)) {
|
|
|
+ wreq = (struct iw_scan_req *)extra;
|
|
|
+
|
|
|
+ if (wrqu->data.flags & IW_SCAN_THIS_ESSID) {
|
|
|
+ if (wreq->essid_len > IEEE80211_MAX_SSID_LEN)
|
|
|
+ return -EINVAL;
|
|
|
+ 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ rdev->scan_req = creq;
|
|
|
+ err = rdev->ops->scan(wiphy, dev, creq);
|
|
|
+ if (err) {
|
|
|
+ rdev->scan_req = NULL;
|
|
|
+ kfree(creq);
|
|
|
+ }
|
|
|
+ out:
|
|
|
+ cfg80211_put_dev(rdev);
|
|
|
+ return err;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(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 char *
|
|
|
+ieee80211_bss(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;
|
|
|
+ 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 (bss->pub.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_INVALID;
|
|
|
+ switch (bss->pub.signal_type) {
|
|
|
+ case CFG80211_SIGNAL_TYPE_MBM:
|
|
|
+ iwe.u.qual.level = bss->pub.signal / 100;
|
|
|
+ iwe.u.qual.updated |= IW_QUAL_DBM;
|
|
|
+ break;
|
|
|
+ case CFG80211_SIGNAL_TYPE_UNSPEC:
|
|
|
+ iwe.u.qual.level = 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] != IEEE80211_MESH_CONFIG_LEN)
|
|
|
+ break;
|
|
|
+ buf = kmalloc(50, GFP_ATOMIC);
|
|
|
+ if (!buf)
|
|
|
+ break;
|
|
|
+ cfg = ie + 2;
|
|
|
+ memset(&iwe, 0, sizeof(iwe));
|
|
|
+ iwe.cmd = IWEVCUSTOM;
|
|
|
+ sprintf(buf, "Mesh network (version %d)", 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 Protocol ID: "
|
|
|
+ "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
|
|
|
+ cfg[4]);
|
|
|
+ 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]);
|
|
|
+ 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]);
|
|
|
+ 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]);
|
|
|
+ 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: %dms ago",
|
|
|
+ jiffies_to_msecs(jiffies - 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(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->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_put_dev(rdev);
|
|
|
+ return res;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(cfg80211_wext_giwscan);
|
|
|
+#endif
|
Johannes Berg