+++ /dev/null
-/*
- * Original code based Host AP (software wireless LAN access point) driver
- * for Intersil Prism2/2.5/3 - hostap.o module, common routines
- *
- * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
- * <j@w1.fi>
- * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
- * Copyright (c) 2004-2005, Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation. See README and COPYING for
- * more details.
- */
-
-#include <linux/compiler.h>
-#include <linux/errno.h>
-#include <linux/if_arp.h>
-#include <linux/in6.h>
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/proc_fs.h>
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/tcp.h>
-#include <linux/types.h>
-#include <linux/wireless.h>
-#include <linux/etherdevice.h>
-#include <asm/uaccess.h>
-#include <linux/ctype.h>
-
-#include <net/lib80211.h>
-#include <net/ieee80211.h>
-
-static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
- struct sk_buff *skb,
- struct ieee80211_rx_stats *rx_stats)
-{
- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
- u16 fc = le16_to_cpu(hdr->frame_control);
-
- skb->dev = ieee->dev;
- skb_reset_mac_header(skb);
- skb_pull(skb, ieee80211_get_hdrlen(fc));
- skb->pkt_type = PACKET_OTHERHOST;
- skb->protocol = htons(ETH_P_80211_RAW);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
-}
-
-/* Called only as a tasklet (software IRQ) */
-static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
- ieee80211_device
- *ieee,
- unsigned int seq,
- unsigned int frag,
- u8 * src,
- u8 * dst)
-{
- struct ieee80211_frag_entry *entry;
- int i;
-
- for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
- entry = &ieee->frag_cache[i];
- if (entry->skb != NULL &&
- time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
- IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
- "seq=%u last_frag=%u\n",
- entry->seq, entry->last_frag);
- dev_kfree_skb_any(entry->skb);
- entry->skb = NULL;
- }
-
- if (entry->skb != NULL && entry->seq == seq &&
- (entry->last_frag + 1 == frag || frag == -1) &&
- !compare_ether_addr(entry->src_addr, src) &&
- !compare_ether_addr(entry->dst_addr, dst))
- return entry;
- }
-
- return NULL;
-}
-
-/* Called only as a tasklet (software IRQ) */
-static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
- struct ieee80211_hdr_4addr *hdr)
-{
- struct sk_buff *skb = NULL;
- u16 sc;
- unsigned int frag, seq;
- struct ieee80211_frag_entry *entry;
-
- sc = le16_to_cpu(hdr->seq_ctl);
- frag = WLAN_GET_SEQ_FRAG(sc);
- seq = WLAN_GET_SEQ_SEQ(sc);
-
- if (frag == 0) {
- /* Reserve enough space to fit maximum frame length */
- skb = dev_alloc_skb(ieee->dev->mtu +
- sizeof(struct ieee80211_hdr_4addr) +
- 8 /* LLC */ +
- 2 /* alignment */ +
- 8 /* WEP */ + ETH_ALEN /* WDS */ );
- if (skb == NULL)
- return NULL;
-
- entry = &ieee->frag_cache[ieee->frag_next_idx];
- ieee->frag_next_idx++;
- if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
- ieee->frag_next_idx = 0;
-
- if (entry->skb != NULL)
- dev_kfree_skb_any(entry->skb);
-
- entry->first_frag_time = jiffies;
- entry->seq = seq;
- entry->last_frag = frag;
- entry->skb = skb;
- memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
- memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
- } else {
- /* received a fragment of a frame for which the head fragment
- * should have already been received */
- entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
- hdr->addr1);
- if (entry != NULL) {
- entry->last_frag = frag;
- skb = entry->skb;
- }
- }
-
- return skb;
-}
-
-/* Called only as a tasklet (software IRQ) */
-static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
- struct ieee80211_hdr_4addr *hdr)
-{
- u16 sc;
- unsigned int seq;
- struct ieee80211_frag_entry *entry;
-
- sc = le16_to_cpu(hdr->seq_ctl);
- seq = WLAN_GET_SEQ_SEQ(sc);
-
- entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
- hdr->addr1);
-
- if (entry == NULL) {
- IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
- "entry (seq=%u)\n", seq);
- return -1;
- }
-
- entry->skb = NULL;
- return 0;
-}
-
-#ifdef NOT_YET
-/* ieee80211_rx_frame_mgtmt
- *
- * Responsible for handling management control frames
- *
- * Called by ieee80211_rx */
-static int
-ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
- struct ieee80211_rx_stats *rx_stats, u16 type,
- u16 stype)
-{
- if (ieee->iw_mode == IW_MODE_MASTER) {
- printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
- ieee->dev->name);
- return 0;
-/*
- hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
- skb->data);*/
- }
-
- if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
- if (stype == WLAN_FC_STYPE_BEACON &&
- ieee->iw_mode == IW_MODE_MASTER) {
- struct sk_buff *skb2;
- /* Process beacon frames also in kernel driver to
- * update STA(AP) table statistics */
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (skb2)
- hostap_rx(skb2->dev, skb2, rx_stats);
- }
-
- /* send management frames to the user space daemon for
- * processing */
- ieee->apdevstats.rx_packets++;
- ieee->apdevstats.rx_bytes += skb->len;
- prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
- return 0;
- }
-
- if (ieee->iw_mode == IW_MODE_MASTER) {
- if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
- printk(KERN_DEBUG "%s: unknown management frame "
- "(type=0x%02x, stype=0x%02x) dropped\n",
- skb->dev->name, type, stype);
- return -1;
- }
-
- hostap_rx(skb->dev, skb, rx_stats);
- return 0;
- }
-
- printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
- "received in non-Host AP mode\n", skb->dev->name);
- return -1;
-}
-#endif
-
-/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
-/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
-static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
-
-/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
-static unsigned char bridge_tunnel_header[] =
- { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
-/* No encapsulation header if EtherType < 0x600 (=length) */
-
-/* Called by ieee80211_rx_frame_decrypt */
-static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
- struct sk_buff *skb)
-{
- struct net_device *dev = ieee->dev;
- u16 fc, ethertype;
- struct ieee80211_hdr_3addr *hdr;
- u8 *pos;
-
- if (skb->len < 24)
- return 0;
-
- hdr = (struct ieee80211_hdr_3addr *)skb->data;
- fc = le16_to_cpu(hdr->frame_ctl);
-
- /* check that the frame is unicast frame to us */
- if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
- IEEE80211_FCTL_TODS &&
- !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
- !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
- /* ToDS frame with own addr BSSID and DA */
- } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
- IEEE80211_FCTL_FROMDS &&
- !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
- /* FromDS frame with own addr as DA */
- } else
- return 0;
-
- if (skb->len < 24 + 8)
- return 0;
-
- /* check for port access entity Ethernet type */
- pos = skb->data + 24;
- ethertype = (pos[6] << 8) | pos[7];
- if (ethertype == ETH_P_PAE)
- return 1;
-
- return 0;
-}
-
-/* Called only as a tasklet (software IRQ), by ieee80211_rx */
-static int
-ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
- struct lib80211_crypt_data *crypt)
-{
- struct ieee80211_hdr_3addr *hdr;
- int res, hdrlen;
-
- if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
- return 0;
-
- hdr = (struct ieee80211_hdr_3addr *)skb->data;
- hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
-
- atomic_inc(&crypt->refcnt);
- res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
- atomic_dec(&crypt->refcnt);
- if (res < 0) {
- IEEE80211_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
- hdr->addr2, res);
- if (res == -2)
- IEEE80211_DEBUG_DROP("Decryption failed ICV "
- "mismatch (key %d)\n",
- skb->data[hdrlen + 3] >> 6);
- ieee->ieee_stats.rx_discards_undecryptable++;
- return -1;
- }
-
- return res;
-}
-
-/* Called only as a tasklet (software IRQ), by ieee80211_rx */
-static int
-ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
- struct sk_buff *skb, int keyidx,
- struct lib80211_crypt_data *crypt)
-{
- struct ieee80211_hdr_3addr *hdr;
- int res, hdrlen;
-
- if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
- return 0;
-
- hdr = (struct ieee80211_hdr_3addr *)skb->data;
- hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
-
- atomic_inc(&crypt->refcnt);
- res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
- atomic_dec(&crypt->refcnt);
- if (res < 0) {
- printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
- " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
- keyidx);
- return -1;
- }
-
- return 0;
-}
-
-/* All received frames are sent to this function. @skb contains the frame in
- * IEEE 802.11 format, i.e., in the format it was sent over air.
- * This function is called only as a tasklet (software IRQ). */
-int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
- struct ieee80211_rx_stats *rx_stats)
-{
- struct net_device *dev = ieee->dev;
- struct ieee80211_hdr_4addr *hdr;
- size_t hdrlen;
- u16 fc, type, stype, sc;
- struct net_device_stats *stats;
- unsigned int frag;
- u8 *payload;
- u16 ethertype;
-#ifdef NOT_YET
- struct net_device *wds = NULL;
- struct sk_buff *skb2 = NULL;
- struct net_device *wds = NULL;
- int frame_authorized = 0;
- int from_assoc_ap = 0;
- void *sta = NULL;
-#endif
- u8 dst[ETH_ALEN];
- u8 src[ETH_ALEN];
- struct lib80211_crypt_data *crypt = NULL;
- int keyidx = 0;
- int can_be_decrypted = 0;
-
- hdr = (struct ieee80211_hdr_4addr *)skb->data;
- stats = &ieee->stats;
-
- if (skb->len < 10) {
- printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
- goto rx_dropped;
- }
-
- fc = le16_to_cpu(hdr->frame_ctl);
- type = WLAN_FC_GET_TYPE(fc);
- stype = WLAN_FC_GET_STYPE(fc);
- sc = le16_to_cpu(hdr->seq_ctl);
- frag = WLAN_GET_SEQ_FRAG(sc);
- hdrlen = ieee80211_get_hdrlen(fc);
-
- if (skb->len < hdrlen) {
- printk(KERN_INFO "%s: invalid SKB length %d\n",
- dev->name, skb->len);
- goto rx_dropped;
- }
-
- /* Put this code here so that we avoid duplicating it in all
- * Rx paths. - Jean II */
-#ifdef CONFIG_WIRELESS_EXT
-#ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
- /* If spy monitoring on */
- if (ieee->spy_data.spy_number > 0) {
- struct iw_quality wstats;
-
- wstats.updated = 0;
- if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
- wstats.level = rx_stats->signal;
- wstats.updated |= IW_QUAL_LEVEL_UPDATED;
- } else
- wstats.updated |= IW_QUAL_LEVEL_INVALID;
-
- if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
- wstats.noise = rx_stats->noise;
- wstats.updated |= IW_QUAL_NOISE_UPDATED;
- } else
- wstats.updated |= IW_QUAL_NOISE_INVALID;
-
- if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
- wstats.qual = rx_stats->signal;
- wstats.updated |= IW_QUAL_QUAL_UPDATED;
- } else
- wstats.updated |= IW_QUAL_QUAL_INVALID;
-
- /* Update spy records */
- wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
- }
-#endif /* IW_WIRELESS_SPY */
-#endif /* CONFIG_WIRELESS_EXT */
-
-#ifdef NOT_YET
- hostap_update_rx_stats(local->ap, hdr, rx_stats);
-#endif
-
- if (ieee->iw_mode == IW_MODE_MONITOR) {
- stats->rx_packets++;
- stats->rx_bytes += skb->len;
- ieee80211_monitor_rx(ieee, skb, rx_stats);
- return 1;
- }
-
- can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
- is_broadcast_ether_addr(hdr->addr2)) ?
- ieee->host_mc_decrypt : ieee->host_decrypt;
-
- if (can_be_decrypted) {
- if (skb->len >= hdrlen + 3) {
- /* Top two-bits of byte 3 are the key index */
- keyidx = skb->data[hdrlen + 3] >> 6;
- }
-
- /* ieee->crypt[] is WEP_KEY (4) in length. Given that keyidx
- * is only allowed 2-bits of storage, no value of keyidx can
- * be provided via above code that would result in keyidx
- * being out of range */
- crypt = ieee->crypt_info.crypt[keyidx];
-
-#ifdef NOT_YET
- sta = NULL;
-
- /* Use station specific key to override default keys if the
- * receiver address is a unicast address ("individual RA"). If
- * bcrx_sta_key parameter is set, station specific key is used
- * even with broad/multicast targets (this is against IEEE
- * 802.11, but makes it easier to use different keys with
- * stations that do not support WEP key mapping). */
-
- if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
- (void)hostap_handle_sta_crypto(local, hdr, &crypt,
- &sta);
-#endif
-
- /* allow NULL decrypt to indicate an station specific override
- * for default encryption */
- if (crypt && (crypt->ops == NULL ||
- crypt->ops->decrypt_mpdu == NULL))
- crypt = NULL;
-
- if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
- /* This seems to be triggered by some (multicast?)
- * frames from other than current BSS, so just drop the
- * frames silently instead of filling system log with
- * these reports. */
- IEEE80211_DEBUG_DROP("Decryption failed (not set)"
- " (SA=%pM)\n", hdr->addr2);
- ieee->ieee_stats.rx_discards_undecryptable++;
- goto rx_dropped;
- }
- }
-#ifdef NOT_YET
- if (type != WLAN_FC_TYPE_DATA) {
- if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
- fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
- (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
- printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
- "from %pM\n", dev->name, hdr->addr2);
- /* TODO: could inform hostapd about this so that it
- * could send auth failure report */
- goto rx_dropped;
- }
-
- if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
- goto rx_dropped;
- else
- goto rx_exit;
- }
-#endif
- /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
- if (sc == ieee->prev_seq_ctl)
- goto rx_dropped;
- else
- ieee->prev_seq_ctl = sc;
-
- /* Data frame - extract src/dst addresses */
- if (skb->len < IEEE80211_3ADDR_LEN)
- goto rx_dropped;
-
- switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
- case IEEE80211_FCTL_FROMDS:
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr3, ETH_ALEN);
- break;
- case IEEE80211_FCTL_TODS:
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
- break;
- case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
- if (skb->len < IEEE80211_4ADDR_LEN)
- goto rx_dropped;
- memcpy(dst, hdr->addr3, ETH_ALEN);
- memcpy(src, hdr->addr4, ETH_ALEN);
- break;
- case 0:
- memcpy(dst, hdr->addr1, ETH_ALEN);
- memcpy(src, hdr->addr2, ETH_ALEN);
- break;
- }
-
-#ifdef NOT_YET
- if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
- goto rx_dropped;
- if (wds) {
- skb->dev = dev = wds;
- stats = hostap_get_stats(dev);
- }
-
- if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
- (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
- IEEE80211_FCTL_FROMDS && ieee->stadev
- && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
- /* Frame from BSSID of the AP for which we are a client */
- skb->dev = dev = ieee->stadev;
- stats = hostap_get_stats(dev);
- from_assoc_ap = 1;
- }
-#endif
-
-#ifdef NOT_YET
- if ((ieee->iw_mode == IW_MODE_MASTER ||
- ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
- switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
- wds != NULL)) {
- case AP_RX_CONTINUE_NOT_AUTHORIZED:
- frame_authorized = 0;
- break;
- case AP_RX_CONTINUE:
- frame_authorized = 1;
- break;
- case AP_RX_DROP:
- goto rx_dropped;
- case AP_RX_EXIT:
- goto rx_exit;
- }
- }
-#endif
-
- /* Nullfunc frames may have PS-bit set, so they must be passed to
- * hostap_handle_sta_rx() before being dropped here. */
-
- stype &= ~IEEE80211_STYPE_QOS_DATA;
-
- if (stype != IEEE80211_STYPE_DATA &&
- stype != IEEE80211_STYPE_DATA_CFACK &&
- stype != IEEE80211_STYPE_DATA_CFPOLL &&
- stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
- if (stype != IEEE80211_STYPE_NULLFUNC)
- IEEE80211_DEBUG_DROP("RX: dropped data frame "
- "with no data (type=0x%02x, "
- "subtype=0x%02x, len=%d)\n",
- type, stype, skb->len);
- goto rx_dropped;
- }
-
- /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
-
- if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
- (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
- goto rx_dropped;
-
- hdr = (struct ieee80211_hdr_4addr *)skb->data;
-
- /* skb: hdr + (possibly fragmented) plaintext payload */
- // PR: FIXME: hostap has additional conditions in the "if" below:
- // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
- if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
- int flen;
- struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
- IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
-
- if (!frag_skb) {
- IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
- "Rx cannot get skb from fragment "
- "cache (morefrag=%d seq=%u frag=%u)\n",
- (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
- WLAN_GET_SEQ_SEQ(sc), frag);
- goto rx_dropped;
- }
-
- flen = skb->len;
- if (frag != 0)
- flen -= hdrlen;
-
- if (frag_skb->tail + flen > frag_skb->end) {
- printk(KERN_WARNING "%s: host decrypted and "
- "reassembled frame did not fit skb\n",
- dev->name);
- ieee80211_frag_cache_invalidate(ieee, hdr);
- goto rx_dropped;
- }
-
- if (frag == 0) {
- /* copy first fragment (including full headers) into
- * beginning of the fragment cache skb */
- skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
- } else {
- /* append frame payload to the end of the fragment
- * cache skb */
- skb_copy_from_linear_data_offset(skb, hdrlen,
- skb_put(frag_skb, flen), flen);
- }
- dev_kfree_skb_any(skb);
- skb = NULL;
-
- if (fc & IEEE80211_FCTL_MOREFRAGS) {
- /* more fragments expected - leave the skb in fragment
- * cache for now; it will be delivered to upper layers
- * after all fragments have been received */
- goto rx_exit;
- }
-
- /* this was the last fragment and the frame will be
- * delivered, so remove skb from fragment cache */
- skb = frag_skb;
- hdr = (struct ieee80211_hdr_4addr *)skb->data;
- ieee80211_frag_cache_invalidate(ieee, hdr);
- }
-
- /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
- * encrypted/authenticated */
- if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
- ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
- goto rx_dropped;
-
- hdr = (struct ieee80211_hdr_4addr *)skb->data;
- if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
- if ( /*ieee->ieee802_1x && */
- ieee80211_is_eapol_frame(ieee, skb)) {
- /* pass unencrypted EAPOL frames even if encryption is
- * configured */
- } else {
- IEEE80211_DEBUG_DROP("encryption configured, but RX "
- "frame not encrypted (SA=%pM)\n",
- hdr->addr2);
- goto rx_dropped;
- }
- }
-
- if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
- !ieee80211_is_eapol_frame(ieee, skb)) {
- IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
- "frame from %pM (drop_unencrypted=1)\n",
- hdr->addr2);
- goto rx_dropped;
- }
-
- /* If the frame was decrypted in hardware, we may need to strip off
- * any security data (IV, ICV, etc) that was left behind */
- if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
- ieee->host_strip_iv_icv) {
- int trimlen = 0;
-
- /* Top two-bits of byte 3 are the key index */
- if (skb->len >= hdrlen + 3)
- keyidx = skb->data[hdrlen + 3] >> 6;
-
- /* To strip off any security data which appears before the
- * payload, we simply increase hdrlen (as the header gets
- * chopped off immediately below). For the security data which
- * appears after the payload, we use skb_trim. */
-
- switch (ieee->sec.encode_alg[keyidx]) {
- case SEC_ALG_WEP:
- /* 4 byte IV */
- hdrlen += 4;
- /* 4 byte ICV */
- trimlen = 4;
- break;
- case SEC_ALG_TKIP:
- /* 4 byte IV, 4 byte ExtIV */
- hdrlen += 8;
- /* 8 byte MIC, 4 byte ICV */
- trimlen = 12;
- break;
- case SEC_ALG_CCMP:
- /* 8 byte CCMP header */
- hdrlen += 8;
- /* 8 byte MIC */
- trimlen = 8;
- break;
- }
-
- if (skb->len < trimlen)
- goto rx_dropped;
-
- __skb_trim(skb, skb->len - trimlen);
-
- if (skb->len < hdrlen)
- goto rx_dropped;
- }
-
- /* skb: hdr + (possible reassembled) full plaintext payload */
-
- payload = skb->data + hdrlen;
- ethertype = (payload[6] << 8) | payload[7];
-
-#ifdef NOT_YET
- /* If IEEE 802.1X is used, check whether the port is authorized to send
- * the received frame. */
- if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
- if (ethertype == ETH_P_PAE) {
- printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
- dev->name);
- if (ieee->hostapd && ieee->apdev) {
- /* Send IEEE 802.1X frames to the user
- * space daemon for processing */
- prism2_rx_80211(ieee->apdev, skb, rx_stats,
- PRISM2_RX_MGMT);
- ieee->apdevstats.rx_packets++;
- ieee->apdevstats.rx_bytes += skb->len;
- goto rx_exit;
- }
- } else if (!frame_authorized) {
- printk(KERN_DEBUG "%s: dropped frame from "
- "unauthorized port (IEEE 802.1X): "
- "ethertype=0x%04x\n", dev->name, ethertype);
- goto rx_dropped;
- }
- }
-#endif
-
- /* convert hdr + possible LLC headers into Ethernet header */
- if (skb->len - hdrlen >= 8 &&
- ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
- ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
- memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
- /* remove RFC1042 or Bridge-Tunnel encapsulation and
- * replace EtherType */
- skb_pull(skb, hdrlen + SNAP_SIZE);
- memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
- memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
- } else {
- __be16 len;
- /* Leave Ethernet header part of hdr and full payload */
- skb_pull(skb, hdrlen);
- len = htons(skb->len);
- memcpy(skb_push(skb, 2), &len, 2);
- memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
- memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
- }
-
-#ifdef NOT_YET
- if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
- IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
- /* Non-standard frame: get addr4 from its bogus location after
- * the payload */
- skb_copy_to_linear_data_offset(skb, ETH_ALEN,
- skb->data + skb->len - ETH_ALEN,
- ETH_ALEN);
- skb_trim(skb, skb->len - ETH_ALEN);
- }
-#endif
-
- stats->rx_packets++;
- stats->rx_bytes += skb->len;
-
-#ifdef NOT_YET
- if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
- if (dst[0] & 0x01) {
- /* copy multicast frame both to the higher layers and
- * to the wireless media */
- ieee->ap->bridged_multicast++;
- skb2 = skb_clone(skb, GFP_ATOMIC);
- if (skb2 == NULL)
- printk(KERN_DEBUG "%s: skb_clone failed for "
- "multicast frame\n", dev->name);
- } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
- /* send frame directly to the associated STA using
- * wireless media and not passing to higher layers */
- ieee->ap->bridged_unicast++;
- skb2 = skb;
- skb = NULL;
- }
- }
-
- if (skb2 != NULL) {
- /* send to wireless media */
- skb2->dev = dev;
- skb2->protocol = htons(ETH_P_802_3);
- skb_reset_mac_header(skb2);
- skb_reset_network_header(skb2);
- /* skb2->network_header += ETH_HLEN; */
- dev_queue_xmit(skb2);
- }
-#endif
-
- if (skb) {
- skb->protocol = eth_type_trans(skb, dev);
- memset(skb->cb, 0, sizeof(skb->cb));
- skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
- if (netif_rx(skb) == NET_RX_DROP) {
- /* netif_rx always succeeds, but it might drop
- * the packet. If it drops the packet, we log that
- * in our stats. */
- IEEE80211_DEBUG_DROP
- ("RX: netif_rx dropped the packet\n");
- stats->rx_dropped++;
- }
- }
-
- rx_exit:
-#ifdef NOT_YET
- if (sta)
- hostap_handle_sta_release(sta);
-#endif
- return 1;
-
- rx_dropped:
- stats->rx_dropped++;
-
- /* Returning 0 indicates to caller that we have not handled the SKB--
- * so it is still allocated and can be used again by underlying
- * hardware as a DMA target */
- return 0;
-}
-
-/* Filter out unrelated packets, call ieee80211_rx[_mgt]
- * This function takes over the skb, it should not be used again after calling
- * this function. */
-void ieee80211_rx_any(struct ieee80211_device *ieee,
- struct sk_buff *skb, struct ieee80211_rx_stats *stats)
-{
- struct ieee80211_hdr_4addr *hdr;
- int is_packet_for_us;
- u16 fc;
-
- if (ieee->iw_mode == IW_MODE_MONITOR) {
- if (!ieee80211_rx(ieee, skb, stats))
- dev_kfree_skb_irq(skb);
- return;
- }
-
- if (skb->len < sizeof(struct ieee80211_hdr))
- goto drop_free;
-
- hdr = (struct ieee80211_hdr_4addr *)skb->data;
- fc = le16_to_cpu(hdr->frame_ctl);
-
- if ((fc & IEEE80211_FCTL_VERS) != 0)
- goto drop_free;
-
- switch (fc & IEEE80211_FCTL_FTYPE) {
- case IEEE80211_FTYPE_MGMT:
- if (skb->len < sizeof(struct ieee80211_hdr_3addr))
- goto drop_free;
- ieee80211_rx_mgt(ieee, hdr, stats);
- dev_kfree_skb_irq(skb);
- return;
- case IEEE80211_FTYPE_DATA:
- break;
- case IEEE80211_FTYPE_CTL:
- return;
- default:
- return;
- }
-
- is_packet_for_us = 0;
- switch (ieee->iw_mode) {
- case IW_MODE_ADHOC:
- /* our BSS and not from/to DS */
- if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
- if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
- /* promisc: get all */
- if (ieee->dev->flags & IFF_PROMISC)
- is_packet_for_us = 1;
- /* to us */
- else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
- is_packet_for_us = 1;
- /* mcast */
- else if (is_multicast_ether_addr(hdr->addr1))
- is_packet_for_us = 1;
- }
- break;
- case IW_MODE_INFRA:
- /* our BSS (== from our AP) and from DS */
- if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
- if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
- /* promisc: get all */
- if (ieee->dev->flags & IFF_PROMISC)
- is_packet_for_us = 1;
- /* to us */
- else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
- is_packet_for_us = 1;
- /* mcast */
- else if (is_multicast_ether_addr(hdr->addr1)) {
- /* not our own packet bcasted from AP */
- if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
- is_packet_for_us = 1;
- }
- }
- break;
- default:
- /* ? */
- break;
- }
-
- if (is_packet_for_us)
- if (!ieee80211_rx(ieee, skb, stats))
- dev_kfree_skb_irq(skb);
- return;
-
-drop_free:
- dev_kfree_skb_irq(skb);
- ieee->stats.rx_dropped++;
- return;
-}
-
-#define MGMT_FRAME_FIXED_PART_LENGTH 0x24
-
-static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
-
-/*
-* Make ther structure we read from the beacon packet has
-* the right values
-*/
-static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
- *info_element, int sub_type)
-{
-
- if (info_element->qui_subtype != sub_type)
- return -1;
- if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
- return -1;
- if (info_element->qui_type != QOS_OUI_TYPE)
- return -1;
- if (info_element->version != QOS_VERSION_1)
- return -1;
-
- return 0;
-}
-
-/*
- * Parse a QoS parameter element
- */
-static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
- *element_param, struct ieee80211_info_element
- *info_element)
-{
- int ret = 0;
- u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
-
- if ((info_element == NULL) || (element_param == NULL))
- return -1;
-
- if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
- memcpy(element_param->info_element.qui, info_element->data,
- info_element->len);
- element_param->info_element.elementID = info_element->id;
- element_param->info_element.length = info_element->len;
- } else
- ret = -1;
- if (ret == 0)
- ret = ieee80211_verify_qos_info(&element_param->info_element,
- QOS_OUI_PARAM_SUB_TYPE);
- return ret;
-}
-
-/*
- * Parse a QoS information element
- */
-static int ieee80211_read_qos_info_element(struct
- ieee80211_qos_information_element
- *element_info, struct ieee80211_info_element
- *info_element)
-{
- int ret = 0;
- u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
-
- if (element_info == NULL)
- return -1;
- if (info_element == NULL)
- return -1;
-
- if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
- memcpy(element_info->qui, info_element->data,
- info_element->len);
- element_info->elementID = info_element->id;
- element_info->length = info_element->len;
- } else
- ret = -1;
-
- if (ret == 0)
- ret = ieee80211_verify_qos_info(element_info,
- QOS_OUI_INFO_SUB_TYPE);
- return ret;
-}
-
-/*
- * Write QoS parameters from the ac parameters.
- */
-static int ieee80211_qos_convert_ac_to_parameters(struct
- ieee80211_qos_parameter_info
- *param_elm, struct
- ieee80211_qos_parameters
- *qos_param)
-{
- int rc = 0;
- int i;
- struct ieee80211_qos_ac_parameter *ac_params;
- u32 txop;
- u8 cw_min;
- u8 cw_max;
-
- for (i = 0; i < QOS_QUEUE_NUM; i++) {
- ac_params = &(param_elm->ac_params_record[i]);
-
- qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
- qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
-
- cw_min = ac_params->ecw_min_max & 0x0F;
- qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
-
- cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
- qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
-
- qos_param->flag[i] =
- (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
-
- txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
- qos_param->tx_op_limit[i] = cpu_to_le16(txop);
- }
- return rc;
-}
-
-/*
- * we have a generic data element which it may contain QoS information or
- * parameters element. check the information element length to decide
- * which type to read
- */
-static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
- *info_element,
- struct ieee80211_network *network)
-{
- int rc = 0;
- struct ieee80211_qos_parameters *qos_param = NULL;
- struct ieee80211_qos_information_element qos_info_element;
-
- rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
-
- if (rc == 0) {
- network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
- network->flags |= NETWORK_HAS_QOS_INFORMATION;
- } else {
- struct ieee80211_qos_parameter_info param_element;
-
- rc = ieee80211_read_qos_param_element(¶m_element,
- info_element);
- if (rc == 0) {
- qos_param = &(network->qos_data.parameters);
- ieee80211_qos_convert_ac_to_parameters(¶m_element,
- qos_param);
- network->flags |= NETWORK_HAS_QOS_PARAMETERS;
- network->qos_data.param_count =
- param_element.info_element.ac_info & 0x0F;
- }
- }
-
- if (rc == 0) {
- IEEE80211_DEBUG_QOS("QoS is supported\n");
- network->qos_data.supported = 1;
- }
- return rc;
-}
-
-#ifdef CONFIG_IEEE80211_DEBUG
-#define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
-
-static const char *get_info_element_string(u16 id)
-{
- switch (id) {
- MFIE_STRING(SSID);
- MFIE_STRING(RATES);
- MFIE_STRING(FH_SET);
- MFIE_STRING(DS_SET);
- MFIE_STRING(CF_SET);
- MFIE_STRING(TIM);
- MFIE_STRING(IBSS_SET);
- MFIE_STRING(COUNTRY);
- MFIE_STRING(HOP_PARAMS);
- MFIE_STRING(HOP_TABLE);
- MFIE_STRING(REQUEST);
- MFIE_STRING(CHALLENGE);
- MFIE_STRING(POWER_CONSTRAINT);
- MFIE_STRING(POWER_CAPABILITY);
- MFIE_STRING(TPC_REQUEST);
- MFIE_STRING(TPC_REPORT);
- MFIE_STRING(SUPP_CHANNELS);
- MFIE_STRING(CSA);
- MFIE_STRING(MEASURE_REQUEST);
- MFIE_STRING(MEASURE_REPORT);
- MFIE_STRING(QUIET);
- MFIE_STRING(IBSS_DFS);
- MFIE_STRING(ERP_INFO);
- MFIE_STRING(RSN);
- MFIE_STRING(RATES_EX);
- MFIE_STRING(GENERIC);
- MFIE_STRING(QOS_PARAMETER);
- default:
- return "UNKNOWN";
- }
-}
-#endif
-
-static int ieee80211_parse_info_param(struct ieee80211_info_element
- *info_element, u16 length,
- struct ieee80211_network *network)
-{
- DECLARE_SSID_BUF(ssid);
- u8 i;
-#ifdef CONFIG_IEEE80211_DEBUG
- char rates_str[64];
- char *p;
-#endif
-
- while (length >= sizeof(*info_element)) {
- if (sizeof(*info_element) + info_element->len > length) {
- IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
- "info_element->len + 2 > left : "
- "info_element->len+2=%zd left=%d, id=%d.\n",
- info_element->len +
- sizeof(*info_element),
- length, info_element->id);
- /* We stop processing but don't return an error here
- * because some misbehaviour APs break this rule. ie.
- * Orinoco AP1000. */
- break;
- }
-
- switch (info_element->id) {
- case MFIE_TYPE_SSID:
- network->ssid_len = min(info_element->len,
- (u8) IW_ESSID_MAX_SIZE);
- memcpy(network->ssid, info_element->data,
- network->ssid_len);
- if (network->ssid_len < IW_ESSID_MAX_SIZE)
- memset(network->ssid + network->ssid_len, 0,
- IW_ESSID_MAX_SIZE - network->ssid_len);
-
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
- print_ssid(ssid, network->ssid,
- network->ssid_len),
- network->ssid_len);
- break;
-
- case MFIE_TYPE_RATES:
-#ifdef CONFIG_IEEE80211_DEBUG
- p = rates_str;
-#endif
- network->rates_len = min(info_element->len,
- MAX_RATES_LENGTH);
- for (i = 0; i < network->rates_len; i++) {
- network->rates[i] = info_element->data[i];
-#ifdef CONFIG_IEEE80211_DEBUG
- p += snprintf(p, sizeof(rates_str) -
- (p - rates_str), "%02X ",
- network->rates[i]);
-#endif
- if (ieee80211_is_ofdm_rate
- (info_element->data[i])) {
- network->flags |= NETWORK_HAS_OFDM;
- if (info_element->data[i] &
- IEEE80211_BASIC_RATE_MASK)
- network->flags &=
- ~NETWORK_HAS_CCK;
- }
- }
-
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
- rates_str, network->rates_len);
- break;
-
- case MFIE_TYPE_RATES_EX:
-#ifdef CONFIG_IEEE80211_DEBUG
- p = rates_str;
-#endif
- network->rates_ex_len = min(info_element->len,
- MAX_RATES_EX_LENGTH);
- for (i = 0; i < network->rates_ex_len; i++) {
- network->rates_ex[i] = info_element->data[i];
-#ifdef CONFIG_IEEE80211_DEBUG
- p += snprintf(p, sizeof(rates_str) -
- (p - rates_str), "%02X ",
- network->rates[i]);
-#endif
- if (ieee80211_is_ofdm_rate
- (info_element->data[i])) {
- network->flags |= NETWORK_HAS_OFDM;
- if (info_element->data[i] &
- IEEE80211_BASIC_RATE_MASK)
- network->flags &=
- ~NETWORK_HAS_CCK;
- }
- }
-
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
- rates_str, network->rates_ex_len);
- break;
-
- case MFIE_TYPE_DS_SET:
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
- info_element->data[0]);
- network->channel = info_element->data[0];
- break;
-
- case MFIE_TYPE_FH_SET:
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
- break;
-
- case MFIE_TYPE_CF_SET:
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
- break;
-
- case MFIE_TYPE_TIM:
- network->tim.tim_count = info_element->data[0];
- network->tim.tim_period = info_element->data[1];
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
- break;
-
- case MFIE_TYPE_ERP_INFO:
- network->erp_value = info_element->data[0];
- network->flags |= NETWORK_HAS_ERP_VALUE;
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
- network->erp_value);
- break;
-
- case MFIE_TYPE_IBSS_SET:
- network->atim_window = info_element->data[0];
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
- network->atim_window);
- break;
-
- case MFIE_TYPE_CHALLENGE:
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
- break;
-
- case MFIE_TYPE_GENERIC:
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
- info_element->len);
- if (!ieee80211_parse_qos_info_param_IE(info_element,
- network))
- break;
-
- if (info_element->len >= 4 &&
- info_element->data[0] == 0x00 &&
- info_element->data[1] == 0x50 &&
- info_element->data[2] == 0xf2 &&
- info_element->data[3] == 0x01) {
- network->wpa_ie_len = min(info_element->len + 2,
- MAX_WPA_IE_LEN);
- memcpy(network->wpa_ie, info_element,
- network->wpa_ie_len);
- }
- break;
-
- case MFIE_TYPE_RSN:
- IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
- info_element->len);
- network->rsn_ie_len = min(info_element->len + 2,
- MAX_WPA_IE_LEN);
- memcpy(network->rsn_ie, info_element,
- network->rsn_ie_len);
- break;
-
- case MFIE_TYPE_QOS_PARAMETER:
- printk(KERN_ERR
- "QoS Error need to parse QOS_PARAMETER IE\n");
- break;
- /* 802.11h */
- case MFIE_TYPE_POWER_CONSTRAINT:
- network->power_constraint = info_element->data[0];
- network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
- break;
-
- case MFIE_TYPE_CSA:
- network->power_constraint = info_element->data[0];
- network->flags |= NETWORK_HAS_CSA;
- break;
-
- case MFIE_TYPE_QUIET:
- network->quiet.count = info_element->data[0];
- network->quiet.period = info_element->data[1];
- network->quiet.duration = info_element->data[2];
- network->quiet.offset = info_element->data[3];
- network->flags |= NETWORK_HAS_QUIET;
- break;
-
- case MFIE_TYPE_IBSS_DFS:
- if (network->ibss_dfs)
- break;
- network->ibss_dfs = kmemdup(info_element->data,
- info_element->len,
- GFP_ATOMIC);
- if (!network->ibss_dfs)
- return 1;
- network->flags |= NETWORK_HAS_IBSS_DFS;
- break;
-
- case MFIE_TYPE_TPC_REPORT:
- network->tpc_report.transmit_power =
- info_element->data[0];
- network->tpc_report.link_margin = info_element->data[1];
- network->flags |= NETWORK_HAS_TPC_REPORT;
- break;
-
- default:
- IEEE80211_DEBUG_MGMT
- ("Unsupported info element: %s (%d)\n",
- get_info_element_string(info_element->id),
- info_element->id);
- break;
- }
-
- length -= sizeof(*info_element) + info_element->len;
- info_element =
- (struct ieee80211_info_element *)&info_element->
- data[info_element->len];
- }
-
- return 0;
-}
-
-static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
- *frame, struct ieee80211_rx_stats *stats)
-{
- struct ieee80211_network network_resp = {
- .ibss_dfs = NULL,
- };
- struct ieee80211_network *network = &network_resp;
- struct net_device *dev = ieee->dev;
-
- network->flags = 0;
- network->qos_data.active = 0;
- network->qos_data.supported = 0;
- network->qos_data.param_count = 0;
- network->qos_data.old_param_count = 0;
-
- //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
- network->atim_window = le16_to_cpu(frame->aid);
- network->listen_interval = le16_to_cpu(frame->status);
- memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
- network->capability = le16_to_cpu(frame->capability);
- network->last_scanned = jiffies;
- network->rates_len = network->rates_ex_len = 0;
- network->last_associate = 0;
- network->ssid_len = 0;
- network->erp_value =
- (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
-
- if (stats->freq == IEEE80211_52GHZ_BAND) {
- /* for A band (No DS info) */
- network->channel = stats->received_channel;
- } else
- network->flags |= NETWORK_HAS_CCK;
-
- network->wpa_ie_len = 0;
- network->rsn_ie_len = 0;
-
- if (ieee80211_parse_info_param
- (frame->info_element, stats->len - sizeof(*frame), network))
- return 1;
-
- network->mode = 0;
- if (stats->freq == IEEE80211_52GHZ_BAND)
- network->mode = IEEE_A;
- else {
- if (network->flags & NETWORK_HAS_OFDM)
- network->mode |= IEEE_G;
- if (network->flags & NETWORK_HAS_CCK)
- network->mode |= IEEE_B;
- }
-
- memcpy(&network->stats, stats, sizeof(network->stats));
-
- if (ieee->handle_assoc_response != NULL)
- ieee->handle_assoc_response(dev, frame, network);
-
- return 0;
-}
-
-/***************************************************/
-
-static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
- *beacon,
- struct ieee80211_network *network,
- struct ieee80211_rx_stats *stats)
-{
- DECLARE_SSID_BUF(ssid);
-
- network->qos_data.active = 0;
- network->qos_data.supported = 0;
- network->qos_data.param_count = 0;
- network->qos_data.old_param_count = 0;
-
- /* Pull out fixed field data */
- memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
- network->capability = le16_to_cpu(beacon->capability);
- network->last_scanned = jiffies;
- network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
- network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
- network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
- /* Where to pull this? beacon->listen_interval; */
- network->listen_interval = 0x0A;
- network->rates_len = network->rates_ex_len = 0;
- network->last_associate = 0;
- network->ssid_len = 0;
- network->flags = 0;
- network->atim_window = 0;
- network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
- 0x3 : 0x0;
-
- if (stats->freq == IEEE80211_52GHZ_BAND) {
- /* for A band (No DS info) */
- network->channel = stats->received_channel;
- } else
- network->flags |= NETWORK_HAS_CCK;
-
- network->wpa_ie_len = 0;
- network->rsn_ie_len = 0;
-
- if (ieee80211_parse_info_param
- (beacon->info_element, stats->len - sizeof(*beacon), network))
- return 1;
-
- network->mode = 0;
- if (stats->freq == IEEE80211_52GHZ_BAND)
- network->mode = IEEE_A;
- else {
- if (network->flags & NETWORK_HAS_OFDM)
- network->mode |= IEEE_G;
- if (network->flags & NETWORK_HAS_CCK)
- network->mode |= IEEE_B;
- }
-
- if (network->mode == 0) {
- IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
- "network.\n",
- print_ssid(ssid, network->ssid,
- network->ssid_len),
- network->bssid);
- return 1;
- }
-
- memcpy(&network->stats, stats, sizeof(network->stats));
-
- return 0;
-}
-
-static inline int is_same_network(struct ieee80211_network *src,
- struct ieee80211_network *dst)
-{
- /* A network is only a duplicate if the channel, BSSID, and ESSID
- * all match. We treat all <hidden> with the same BSSID and channel
- * as one network */
- return ((src->ssid_len == dst->ssid_len) &&
- (src->channel == dst->channel) &&
- !compare_ether_addr(src->bssid, dst->bssid) &&
- !memcmp(src->ssid, dst->ssid, src->ssid_len));
-}
-
-static void update_network(struct ieee80211_network *dst,
- struct ieee80211_network *src)
-{
- int qos_active;
- u8 old_param;
-
- ieee80211_network_reset(dst);
- dst->ibss_dfs = src->ibss_dfs;
-
- /* We only update the statistics if they were created by receiving
- * the network information on the actual channel the network is on.
- *
- * This keeps beacons received on neighbor channels from bringing
- * down the signal level of an AP. */
- if (dst->channel == src->stats.received_channel)
- memcpy(&dst->stats, &src->stats,
- sizeof(struct ieee80211_rx_stats));
- else
- IEEE80211_DEBUG_SCAN("Network %pM info received "
- "off channel (%d vs. %d)\n", src->bssid,
- dst->channel, src->stats.received_channel);
-
- dst->capability = src->capability;
- memcpy(dst->rates, src->rates, src->rates_len);
- dst->rates_len = src->rates_len;
- memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
- dst->rates_ex_len = src->rates_ex_len;
-
- dst->mode = src->mode;
- dst->flags = src->flags;
- dst->time_stamp[0] = src->time_stamp[0];
- dst->time_stamp[1] = src->time_stamp[1];
-
- dst->beacon_interval = src->beacon_interval;
- dst->listen_interval = src->listen_interval;
- dst->atim_window = src->atim_window;
- dst->erp_value = src->erp_value;
- dst->tim = src->tim;
-
- memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
- dst->wpa_ie_len = src->wpa_ie_len;
- memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
- dst->rsn_ie_len = src->rsn_ie_len;
-
- dst->last_scanned = jiffies;
- qos_active = src->qos_data.active;
- old_param = dst->qos_data.old_param_count;
- if (dst->flags & NETWORK_HAS_QOS_MASK)
- memcpy(&dst->qos_data, &src->qos_data,
- sizeof(struct ieee80211_qos_data));
- else {
- dst->qos_data.supported = src->qos_data.supported;
- dst->qos_data.param_count = src->qos_data.param_count;
- }
-
- if (dst->qos_data.supported == 1) {
- if (dst->ssid_len)
- IEEE80211_DEBUG_QOS
- ("QoS the network %s is QoS supported\n",
- dst->ssid);
- else
- IEEE80211_DEBUG_QOS
- ("QoS the network is QoS supported\n");
- }
- dst->qos_data.active = qos_active;
- dst->qos_data.old_param_count = old_param;
-
- /* dst->last_associate is not overwritten */
-}
-
-static inline int is_beacon(__le16 fc)
-{
- return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
-}
-
-static void ieee80211_process_probe_response(struct ieee80211_device
- *ieee, struct
- ieee80211_probe_response
- *beacon, struct ieee80211_rx_stats
- *stats)
-{
- struct net_device *dev = ieee->dev;
- struct ieee80211_network network = {
- .ibss_dfs = NULL,
- };
- struct ieee80211_network *target;
- struct ieee80211_network *oldest = NULL;
-#ifdef CONFIG_IEEE80211_DEBUG
- struct ieee80211_info_element *info_element = beacon->info_element;
-#endif
- unsigned long flags;
- DECLARE_SSID_BUF(ssid);
-
- IEEE80211_DEBUG_SCAN("'%s' (%pM"
- "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
- print_ssid(ssid, info_element->data, info_element->len),
- beacon->header.addr3,
- (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
- (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
-
- if (ieee80211_network_init(ieee, beacon, &network, stats)) {
- IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
- print_ssid(ssid, info_element->data,
- info_element->len),
- beacon->header.addr3,
- is_beacon(beacon->header.frame_ctl) ?
- "BEACON" : "PROBE RESPONSE");
- return;
- }
-
- /* The network parsed correctly -- so now we scan our known networks
- * to see if we can find it in our list.
- *
- * NOTE: This search is definitely not optimized. Once its doing
- * the "right thing" we'll optimize it for efficiency if
- * necessary */
-
- /* Search for this entry in the list and update it if it is
- * already there. */
-
- spin_lock_irqsave(&ieee->lock, flags);
-
- list_for_each_entry(target, &ieee->network_list, list) {
- if (is_same_network(target, &network))
- break;
-
- if ((oldest == NULL) ||
- (target->last_scanned < oldest->last_scanned))
- oldest = target;
- }
-
- /* If we didn't find a match, then get a new network slot to initialize
- * with this beacon's information */
- if (&target->list == &ieee->network_list) {
- if (list_empty(&ieee->network_free_list)) {
- /* If there are no more slots, expire the oldest */
- list_del(&oldest->list);
- target = oldest;
- IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
- "network list.\n",
- print_ssid(ssid, target->ssid,
- target->ssid_len),
- target->bssid);
- ieee80211_network_reset(target);
- } else {
- /* Otherwise just pull from the free list */
- target = list_entry(ieee->network_free_list.next,
- struct ieee80211_network, list);
- list_del(ieee->network_free_list.next);
- }
-
-#ifdef CONFIG_IEEE80211_DEBUG
- IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
- print_ssid(ssid, network.ssid,
- network.ssid_len),
- network.bssid,
- is_beacon(beacon->header.frame_ctl) ?
- "BEACON" : "PROBE RESPONSE");
-#endif
- memcpy(target, &network, sizeof(*target));
- network.ibss_dfs = NULL;
- list_add_tail(&target->list, &ieee->network_list);
- } else {
- IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
- print_ssid(ssid, target->ssid,
- target->ssid_len),
- target->bssid,
- is_beacon(beacon->header.frame_ctl) ?
- "BEACON" : "PROBE RESPONSE");
- update_network(target, &network);
- network.ibss_dfs = NULL;
- }
-
- spin_unlock_irqrestore(&ieee->lock, flags);
-
- if (is_beacon(beacon->header.frame_ctl)) {
- if (ieee->handle_beacon != NULL)
- ieee->handle_beacon(dev, beacon, target);
- } else {
- if (ieee->handle_probe_response != NULL)
- ieee->handle_probe_response(dev, beacon, target);
- }
-}
-
-void ieee80211_rx_mgt(struct ieee80211_device *ieee,
- struct ieee80211_hdr_4addr *header,
- struct ieee80211_rx_stats *stats)
-{
- switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
- case IEEE80211_STYPE_ASSOC_RESP:
- IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
- ieee80211_handle_assoc_resp(ieee,
- (struct ieee80211_assoc_response *)
- header, stats);
- break;
-
- case IEEE80211_STYPE_REASSOC_RESP:
- IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
- break;
-
- case IEEE80211_STYPE_PROBE_REQ:
- IEEE80211_DEBUG_MGMT("received auth (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
-
- if (ieee->handle_probe_request != NULL)
- ieee->handle_probe_request(ieee->dev,
- (struct
- ieee80211_probe_request *)
- header, stats);
- break;
-
- case IEEE80211_STYPE_PROBE_RESP:
- IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
- IEEE80211_DEBUG_SCAN("Probe response\n");
- ieee80211_process_probe_response(ieee,
- (struct
- ieee80211_probe_response *)
- header, stats);
- break;
-
- case IEEE80211_STYPE_BEACON:
- IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
- IEEE80211_DEBUG_SCAN("Beacon\n");
- ieee80211_process_probe_response(ieee,
- (struct
- ieee80211_probe_response *)
- header, stats);
- break;
- case IEEE80211_STYPE_AUTH:
-
- IEEE80211_DEBUG_MGMT("received auth (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
-
- if (ieee->handle_auth != NULL)
- ieee->handle_auth(ieee->dev,
- (struct ieee80211_auth *)header);
- break;
-
- case IEEE80211_STYPE_DISASSOC:
- if (ieee->handle_disassoc != NULL)
- ieee->handle_disassoc(ieee->dev,
- (struct ieee80211_disassoc *)
- header);
- break;
-
- case IEEE80211_STYPE_ACTION:
- IEEE80211_DEBUG_MGMT("ACTION\n");
- if (ieee->handle_action)
- ieee->handle_action(ieee->dev,
- (struct ieee80211_action *)
- header, stats);
- break;
-
- case IEEE80211_STYPE_REASSOC_REQ:
- IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
-
- IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
- ieee->dev->name);
- if (ieee->handle_reassoc_request != NULL)
- ieee->handle_reassoc_request(ieee->dev,
- (struct ieee80211_reassoc_request *)
- header);
- break;
-
- case IEEE80211_STYPE_ASSOC_REQ:
- IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
-
- IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
- ieee->dev->name);
- if (ieee->handle_assoc_request != NULL)
- ieee->handle_assoc_request(ieee->dev);
- break;
-
- case IEEE80211_STYPE_DEAUTH:
- IEEE80211_DEBUG_MGMT("DEAUTH\n");
- if (ieee->handle_deauth != NULL)
- ieee->handle_deauth(ieee->dev,
- (struct ieee80211_deauth *)
- header);
- break;
- default:
- IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
- IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
- ieee->dev->name,
- WLAN_FC_GET_STYPE(le16_to_cpu
- (header->frame_ctl)));
- break;
- }
-}
-
-EXPORT_SYMBOL_GPL(ieee80211_rx_any);
-EXPORT_SYMBOL(ieee80211_rx_mgt);
-EXPORT_SYMBOL(ieee80211_rx);
git.samba.org / sfrench / cifs-2.6.git / blobdiff