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linux / linux / kernel / git / viro / vfs / 091e0662ee2c37867ad918ce7b6ddd17f0e090e2 / . / drivers / staging / rtl8187se / ieee80211 / ieee80211_rx.c
blob: 304579096562aa0011f0159e0b26665aeb4815ea [file] [log] [blame]
/*
* 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
* <jkmaline@cc.hut.fi>
* Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
* Copyright (c) 2004, 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.
******************************************************************************
Few modifications for Realtek's Wi-Fi drivers by
Andrea Merello <andrea.merello@gmail.com>
A special thanks goes to Realtek for their support !
******************************************************************************/
#include <linux/compiler.h>
//#include <linux/config.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/pci.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 <linux/uaccess.h>
#include <linux/ctype.h>
#include "ieee80211.h"
#include "dot11d.h"
static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
struct sk_buff *skb,
struct ieee80211_rx_stats *rx_stats)
{
struct ieee80211_hdr_4addr *hdr =
(struct ieee80211_hdr_4addr *)skb->data;
u16 fc = le16_to_cpu(hdr->frame_ctl);
skb->dev = ieee->dev;
skb_reset_mac_header(skb);
skb_pull(skb, ieee80211_get_hdrlen(fc));
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = __constant_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 tid, u8 *src, u8 *dst)
{
struct ieee80211_frag_entry *entry;
int i;
for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
entry = &ieee->frag_cache[tid][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) &&
memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
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 fc = le16_to_cpu(hdr->frame_ctl);
u16 sc = le16_to_cpu(hdr->seq_ctl);
unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
struct ieee80211_frag_entry *entry;
struct ieee80211_hdr_3addrqos *hdr_3addrqos;
struct ieee80211_hdr_4addrqos *hdr_4addrqos;
u8 tid;
if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
tid = UP2AC(tid);
tid++;
} else if (IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
tid = UP2AC(tid);
tid++;
} else {
tid = 0;
}
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 */ +
(IEEE80211_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
if (skb == NULL)
return NULL;
entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
ieee->frag_next_idx[tid]++;
if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
ieee->frag_next_idx[tid] = 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, tid, 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 fc = le16_to_cpu(hdr->frame_ctl);
u16 sc = le16_to_cpu(hdr->seq_ctl);
unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
struct ieee80211_frag_entry *entry;
struct ieee80211_hdr_3addrqos *hdr_3addrqos;
struct ieee80211_hdr_4addrqos *hdr_4addrqos;
u8 tid;
if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
tid = UP2AC(tid);
tid++;
} else if (IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
tid = UP2AC(tid);
tid++;
} else {
tid = 0;
}
entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, 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;
}
/* ieee80211_rx_frame_mgtmt
*
* Responsible for handling management control frames
*
* Called by ieee80211_rx */
static inline int
ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
struct ieee80211_rx_stats *rx_stats, u16 type,
u16 stype)
{
struct ieee80211_hdr_4addr *hdr;
// cheat the the hdr type
hdr = (struct ieee80211_hdr_4addr *)skb->data;
/* On the struct stats definition there is written that
* this is not mandatory.... but seems that the probe
* response parser uses it
*/
rx_stats->len = skb->len;
ieee80211_rx_mgt(ieee, (struct ieee80211_hdr_4addr *)skb->data,
rx_stats);
if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) {
dev_kfree_skb_any(skb);
return 0;
}
ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
dev_kfree_skb_any(skb);
return 0;
}
/* 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, size_t hdrlen)
{
struct net_device *dev = ieee->dev;
u16 fc, ethertype;
struct ieee80211_hdr_4addr *hdr;
u8 *pos;
if (skb->len < 24)
return 0;
hdr = (struct ieee80211_hdr_4addr *)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 &&
memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
/* ToDS frame with own addr BSSID and DA */
} else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
IEEE80211_FCTL_FROMDS &&
memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
/* 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;
pos = skb->data + hdrlen;
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 inline int
ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
struct ieee80211_crypt_data *crypt)
{
struct ieee80211_hdr_4addr *hdr;
int res, hdrlen;
if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
return 0;
hdr = (struct ieee80211_hdr_4addr *)skb->data;
hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
#ifdef CONFIG_IEEE80211_CRYPT_TKIP
if (ieee->tkip_countermeasures &&
strcmp(crypt->ops->name, "TKIP") == 0) {
if (net_ratelimit()) {
netdev_dbg(ieee->dev,
"TKIP countermeasures: dropped received packet from %pM\n",
ieee->dev->name, hdr->addr2);
}
return -1;
}
#endif
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 inline int
ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb,
int keyidx, struct ieee80211_crypt_data *crypt)
{
struct ieee80211_hdr_4addr *hdr;
int res, hdrlen;
if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
return 0;
hdr = (struct ieee80211_hdr_4addr *)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) {
netdev_dbg(ieee->dev,
"MSDU decryption/MIC verification failed (SA=%pM keyidx=%d)\n",
hdr->addr2, keyidx);
return -1;
}
return 0;
}
/* this function is stolen from ipw2200 driver*/
#define IEEE_PACKET_RETRY_TIME (5*HZ)
static int is_duplicate_packet(struct ieee80211_device *ieee,
struct ieee80211_hdr_4addr *header)
{
u16 fc = le16_to_cpu(header->frame_ctl);
u16 sc = le16_to_cpu(header->seq_ctl);
u16 seq = WLAN_GET_SEQ_SEQ(sc);
u16 frag = WLAN_GET_SEQ_FRAG(sc);
u16 *last_seq, *last_frag;
unsigned long *last_time;
struct ieee80211_hdr_3addrqos *hdr_3addrqos;
struct ieee80211_hdr_4addrqos *hdr_4addrqos;
u8 tid;
//TO2DS and QoS
if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
tid = UP2AC(tid);
tid++;
} else if (IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)header;
tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
tid = UP2AC(tid);
tid++;
} else { // no QoS
tid = 0;
}
switch (ieee->iw_mode) {
case IW_MODE_ADHOC:
{
struct list_head *p;
struct ieee_ibss_seq *entry = NULL;
u8 *mac = header->addr2;
int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
list_for_each(p, &ieee->ibss_mac_hash[index]) {
entry = list_entry(p, struct ieee_ibss_seq, list);
if (!memcmp(entry->mac, mac, ETH_ALEN))
break;
}
// if (memcmp(entry->mac, mac, ETH_ALEN)){
if (p == &ieee->ibss_mac_hash[index]) {
entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
if (!entry)
return 0;
memcpy(entry->mac, mac, ETH_ALEN);
entry->seq_num[tid] = seq;
entry->frag_num[tid] = frag;
entry->packet_time[tid] = jiffies;
list_add(&entry->list, &ieee->ibss_mac_hash[index]);
return 0;
}
last_seq = &entry->seq_num[tid];
last_frag = &entry->frag_num[tid];
last_time = &entry->packet_time[tid];
break;
}
case IW_MODE_INFRA:
last_seq = &ieee->last_rxseq_num[tid];
last_frag = &ieee->last_rxfrag_num[tid];
last_time = &ieee->last_packet_time[tid];
break;
default:
return 0;
}
// if(tid != 0) {
// printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
// }
if ((*last_seq == seq) &&
time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
if (*last_frag == frag) {
//printk(KERN_WARNING "[1] go drop!\n");
goto drop;
}
if (*last_frag + 1 != frag)
/* out-of-order fragment */
//printk(KERN_WARNING "[2] go drop!\n");
goto drop;
} else
*last_seq = seq;
*last_frag = frag;
*last_time = jiffies;
return 0;
drop:
// BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
// printk("DUP\n");
return 1;
}
/* 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_rtl_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
struct ieee80211_rx_stats *rx_stats)
{
struct net_device *dev = ieee->dev;
//struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(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;
u8 dst[ETH_ALEN];
u8 src[ETH_ALEN];
u8 bssid[ETH_ALEN];
struct ieee80211_crypt_data *crypt = NULL;
int keyidx = 0;
// cheat the the hdr type
hdr = (struct ieee80211_hdr_4addr *)skb->data;
stats = &ieee->stats;
if (skb->len < 10) {
netdev_info(ieee->dev, "SKB length < 10\n");
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);
//YJ,add,080828,for keep alive
if ((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS) {
if (!memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN))
ieee->NumRxUnicast++;
} else {
if (!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN))
ieee->NumRxUnicast++;
}
//YJ,add,080828,for keep alive,end
hdrlen = ieee80211_get_hdrlen(fc);
if (ieee->iw_mode == IW_MODE_MONITOR) {
ieee80211_monitor_rx(ieee, skb, rx_stats);
stats->rx_packets++;
stats->rx_bytes += skb->len;
return 1;
}
if (ieee->host_decrypt) {
int idx = 0;
if (skb->len >= hdrlen + 3)
idx = skb->data[hdrlen + 3] >> 6;
crypt = ieee->crypt[idx];
/* 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_WEP)) {
/* 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;
}
}
if (skb->len < IEEE80211_DATA_HDR3_LEN)
goto rx_dropped;
// if QoS enabled, should check the sequence for each of the AC
if (is_duplicate_packet(ieee, hdr))
goto rx_dropped;
if (type == IEEE80211_FTYPE_MGMT) {
if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
goto rx_dropped;
else
goto rx_exit;
}
/* Data frame - extract src/dst addresses */
switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
case IEEE80211_FCTL_FROMDS:
memcpy(dst, hdr->addr1, ETH_ALEN);
memcpy(src, hdr->addr3, ETH_ALEN);
memcpy(bssid, hdr->addr2, ETH_ALEN);
break;
case IEEE80211_FCTL_TODS:
memcpy(dst, hdr->addr3, ETH_ALEN);
memcpy(src, hdr->addr2, ETH_ALEN);
memcpy(bssid, hdr->addr1, ETH_ALEN);
break;
case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
if (skb->len < IEEE80211_DATA_HDR4_LEN)
goto rx_dropped;
memcpy(dst, hdr->addr3, ETH_ALEN);
memcpy(src, hdr->addr4, ETH_ALEN);
memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
break;
case 0:
memcpy(dst, hdr->addr1, ETH_ALEN);
memcpy(src, hdr->addr2, ETH_ALEN);
memcpy(bssid, hdr->addr3, ETH_ALEN);
break;
}
dev->last_rx = jiffies;
/* Nullfunc frames may have PS-bit set, so they must be passed to
* hostap_handle_sta_rx() before being dropped here. */
if (stype != IEEE80211_STYPE_DATA &&
stype != IEEE80211_STYPE_DATA_CFACK &&
stype != IEEE80211_STYPE_DATA_CFPOLL &&
stype != IEEE80211_STYPE_DATA_CFACKPOLL &&
stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
) {
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;
}
if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
goto rx_dropped;
ieee->NumRxDataInPeriod++;
ieee->NumRxOkTotal++;
/* skb: hdr + (possibly fragmented, possibly encrypted) payload */
if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
(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_WEP) &&
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) {
netdev_warn(ieee->dev,
"host decrypted and reassembled frame did not fit skb\n");
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 */
memcpy(skb_put(frag_skb, flen), skb->data, flen);
} else {
/* append frame payload to the end of the fragment
* cache skb */
memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
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 (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
goto rx_dropped;
hdr = (struct ieee80211_hdr_4addr *)skb->data;
if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
if (/*ieee->ieee802_1x &&*/
ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
#ifdef CONFIG_IEEE80211_DEBUG
/* pass unencrypted EAPOL frames even if encryption is
* configured */
struct eapol *eap = (struct eapol *)(skb->data +
24);
IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
eap_get_type(eap->type));
#endif
} else {
IEEE80211_DEBUG_DROP(
"encryption configured, but RX "
"frame not encrypted (SA=%pM)\n",
hdr->addr2);
goto rx_dropped;
}
}
#ifdef CONFIG_IEEE80211_DEBUG
if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
struct eapol *eap = (struct eapol *)(skb->data +
24);
IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
eap_get_type(eap->type));
}
#endif
if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
!ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
IEEE80211_DEBUG_DROP(
"dropped unencrypted RX data "
"frame from %pM"
" (drop_unencrypted=1)\n",
hdr->addr2);
goto rx_dropped;
}
/*
if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
}
*/
/* skb: hdr + (possible reassembled) full plaintext payload */
payload = skb->data + hdrlen;
ethertype = (payload[6] << 8) | payload[7];
/* 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 {
u16 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);
}
stats->rx_packets++;
stats->rx_bytes += skb->len;
if (skb) {
skb->protocol = eth_type_trans(skb, dev);
memset(skb->cb, 0, sizeof(skb->cb));
skb->dev = dev;
skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
ieee->last_rx_ps_time = jiffies;
netif_rx(skb);
}
rx_exit:
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;
}
#define MGMT_FRAME_FIXED_PART_LENGTH 0x24
static inline int ieee80211_is_ofdm_rate(u8 rate)
{
switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
case IEEE80211_OFDM_RATE_6MB:
case IEEE80211_OFDM_RATE_9MB:
case IEEE80211_OFDM_RATE_12MB:
case IEEE80211_OFDM_RATE_18MB:
case IEEE80211_OFDM_RATE_24MB:
case IEEE80211_OFDM_RATE_36MB:
case IEEE80211_OFDM_RATE_48MB:
case IEEE80211_OFDM_RATE_54MB:
return 1;
}
return 0;
}
static inline int ieee80211_SignalStrengthTranslate(
int CurrSS
)
{
int RetSS;
// Step 1. Scale mapping.
if (CurrSS >= 71 && CurrSS <= 100)
RetSS = 90 + ((CurrSS - 70) / 3);
else if (CurrSS >= 41 && CurrSS <= 70)
RetSS = 78 + ((CurrSS - 40) / 3);
else if (CurrSS >= 31 && CurrSS <= 40)
RetSS = 66 + (CurrSS - 30);
else if (CurrSS >= 21 && CurrSS <= 30)
RetSS = 54 + (CurrSS - 20);
else if (CurrSS >= 5 && CurrSS <= 20)
RetSS = 42 + (((CurrSS - 5) * 2) / 3);
else if (CurrSS == 4)
RetSS = 36;
else if (CurrSS == 3)
RetSS = 27;
else if (CurrSS == 2)
RetSS = 18;
else if (CurrSS == 1)
RetSS = 9;
else
RetSS = CurrSS;
//RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
// Step 2. Smoothing.
//RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
return RetSS;
}
static inline void ieee80211_extract_country_ie(
struct ieee80211_device *ieee,
struct ieee80211_info_element *info_element,
struct ieee80211_network *network,
u8 *addr2
)
{
if (IS_DOT11D_ENABLE(ieee)) {
if (info_element->len != 0) {
memcpy(network->CountryIeBuf, info_element->data, info_element->len);
network->CountryIeLen = info_element->len;
if (!IS_COUNTRY_IE_VALID(ieee))
Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
}
//
// 070305, rcnjko: I update country IE watch dog here because
// some AP (e.g. Cisco 1242) don't include country IE in their
// probe response frame.
//
if (IS_EQUAL_CIE_SRC(ieee, addr2))
UPDATE_CIE_WATCHDOG(ieee);
}
}
static int
ieee80211_TranslateToDbm(
unsigned char SignalStrengthIndex // 0-100 index.
)
{
unsigned char SignalPower; // in dBm.
// Translate to dBm (x=0.5y-95).
SignalPower = (int)SignalStrengthIndex * 7 / 10;
SignalPower -= 95;
return SignalPower;
}
inline int ieee80211_network_init(
struct ieee80211_device *ieee,
struct ieee80211_probe_response *beacon,
struct ieee80211_network *network,
struct ieee80211_rx_stats *stats)
{
#ifdef CONFIG_IEEE80211_DEBUG
char rates_str[64];
char *p;
#endif
struct ieee80211_info_element *info_element;
u16 left;
u8 i;
short offset;
u8 curRate = 0, hOpRate = 0, curRate_ex = 0;
/* Pull out fixed field data */
memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
network->capability = beacon->capability;
network->last_scanned = jiffies;
network->time_stamp[0] = beacon->time_stamp[0];
network->time_stamp[1] = beacon->time_stamp[1];
network->beacon_interval = 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->QoS_Enable = 0;
//by amy 080312
network->HighestOperaRate = 0;
//by amy 080312
network->Turbo_Enable = 0;
network->CountryIeLen = 0;
memset(network->CountryIeBuf, 0, MAX_IE_LEN);
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;
info_element = &beacon->info_element;
left = stats->len - ((void *)info_element - (void *)beacon);
while (left >= sizeof(struct ieee80211_info_element_hdr)) {
if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
info_element->len + sizeof(struct ieee80211_info_element),
left);
return 1;
}
switch (info_element->id) {
case MFIE_TYPE_SSID:
if (ieee80211_is_empty_essid(info_element->data,
info_element->len)) {
network->flags |= NETWORK_EMPTY_ESSID;
break;
}
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_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
network->ssid, 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];
curRate = network->rates[i] & 0x7f;
if (hOpRate < curRate)
hOpRate = curRate;
#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_SCAN("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];
curRate_ex = network->rates_ex[i] & 0x7f;
if (hOpRate < curRate_ex)
hOpRate = curRate_ex;
#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_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
rates_str, network->rates_ex_len);
break;
case MFIE_TYPE_DS_SET:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
info_element->data[0]);
if (stats->freq == IEEE80211_24GHZ_BAND)
network->channel = info_element->data[0];
break;
case MFIE_TYPE_FH_SET:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
break;
case MFIE_TYPE_CF_SET:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
break;
case MFIE_TYPE_TIM:
if (info_element->len < 4)
break;
network->dtim_period = info_element->data[1];
if (ieee->state != IEEE80211_LINKED)
break;
network->last_dtim_sta_time[0] = jiffies;
network->last_dtim_sta_time[1] = stats->mac_time[1];
network->dtim_data = IEEE80211_DTIM_VALID;
if (info_element->data[0] != 0)
break;
if (info_element->data[2] & 1)
network->dtim_data |= IEEE80211_DTIM_MBCAST;
offset = (info_element->data[2] >> 1)*2;
//printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
/* add and modified for ps 2008.1.22 */
if (ieee->assoc_id < 8*offset ||
ieee->assoc_id > 8*(offset + info_element->len - 3)) {
break;
}
offset = (ieee->assoc_id/8) - offset;// + ((aid % 8)? 0 : 1) ;
// printk("offset:%x data:%x, ucast:%d\n", offset,
// info_element->data[3+offset] ,
// info_element->data[3+offset] & (1<<(ieee->assoc_id%8)));
if (info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
network->dtim_data |= IEEE80211_DTIM_UCAST;
break;
case MFIE_TYPE_IBSS_SET:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
break;
case MFIE_TYPE_CHALLENGE:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
break;
case MFIE_TYPE_GENERIC:
//nic is 87B
IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
info_element->len);
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);
}
if (info_element->len == 7 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0xe0 &&
info_element->data[2] == 0x4c &&
info_element->data[3] == 0x01 &&
info_element->data[4] == 0x02) {
network->Turbo_Enable = 1;
}
if (1 == stats->nic_type) //nic 87
break;
if (info_element->len >= 5 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x50 &&
info_element->data[2] == 0xf2 &&
info_element->data[3] == 0x02 &&
info_element->data[4] == 0x00) {
//printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]);
//WMM Information Element
network->wmm_info = info_element->data[6];
network->QoS_Enable = 1;
}
if (info_element->len >= 8 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x50 &&
info_element->data[2] == 0xf2 &&
info_element->data[3] == 0x02 &&
info_element->data[4] == 0x01) {
// Not care about version at present.
//WMM Information Element
//printk(KERN_WARNING "wmm info&param updated: %x\n", info_element->data[6]);
network->wmm_info = info_element->data[6];
//WMM Parameter Element
memcpy(network->wmm_param, (u8 *)(info_element->data + 8), (info_element->len - 8));
network->QoS_Enable = 1;
}
break;
case MFIE_TYPE_RSN:
IEEE80211_DEBUG_SCAN("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_COUNTRY:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
info_element->len);
// printk("=====>Receive <%s> Country IE\n",network->ssid);
ieee80211_extract_country_ie(ieee, info_element, network, beacon->header.addr2);
break;
default:
IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
info_element->id);
break;
}
left -= sizeof(struct ieee80211_info_element_hdr) +
info_element->len;
info_element = (struct ieee80211_info_element *)
&info_element->data[info_element->len];
}
//by amy 080312
network->HighestOperaRate = hOpRate;
//by amy 080312
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",
escape_essid(network->ssid,
network->ssid_len),
network->bssid);
return 1;
}
if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
network->flags |= NETWORK_EMPTY_ESSID;
stats->signal = ieee80211_TranslateToDbm(stats->signalstrength);
//stats->noise = stats->signal - stats->noise;
stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25;
memcpy(&network->stats, stats, sizeof(network->stats));
return 0;
}
static inline int is_same_network(struct ieee80211_network *src,
struct ieee80211_network *dst,
struct ieee80211_device *ieee)
{
/* A network is only a duplicate if the channel, BSSID, ESSID
* and the capability field (in particular IBSS and BSS) all match.
* We treat all <hidden> with the same BSSID and channel
* as one network */
return (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
//((src->ssid_len == dst->ssid_len) &&
(src->channel == dst->channel) &&
!memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
(!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
//!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
((src->capability & WLAN_CAPABILITY_IBSS) ==
(dst->capability & WLAN_CAPABILITY_IBSS)) &&
((src->capability & WLAN_CAPABILITY_BSS) ==
(dst->capability & WLAN_CAPABILITY_BSS)));
}
inline void update_network(struct ieee80211_network *dst,
struct ieee80211_network *src)
{
unsigned char quality = src->stats.signalstrength;
unsigned char signal = 0;
unsigned char noise = 0;
if (dst->stats.signalstrength > 0)
quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6;
signal = ieee80211_TranslateToDbm(quality);
//noise = signal - src->stats.noise;
if (dst->stats.noise > 0)
noise = (dst->stats.noise * 5 + src->stats.noise)/6;
//if(strcmp(dst->ssid, "linksys_lzm000") == 0)
// printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal);
memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
dst->stats.signalstrength = quality;
dst->stats.signal = signal;
// printk("==================>stats.signal is %d\n",dst->stats.signal);
dst->stats.noise = noise;
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->HighestOperaRate = src->HighestOperaRate;
//printk("==========>in %s: src->ssid is %s,chan is %d\n",__func__,src->ssid,src->channel);
//YJ,add,080819,for hidden ap
if (src->ssid_len > 0) {
//if(src->ssid_len == 13)
// printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid);
memset(dst->ssid, 0, dst->ssid_len);
dst->ssid_len = src->ssid_len;
memcpy(dst->ssid, src->ssid, src->ssid_len);
}
//YJ,add,080819,for hidden ap,end
dst->channel = src->channel;
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->dtim_period = src->dtim_period;
dst->dtim_data = src->dtim_data;
dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
// printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data);
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;
/* dst->last_associate is not overwritten */
// disable QoS process now, added by David 2006/7/25
#if 1
dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
/*
if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter
memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN);
}
*/
if (src->wmm_param[0].ac_aci_acm_aifsn || \
src->wmm_param[1].ac_aci_acm_aifsn || \
src->wmm_param[2].ac_aci_acm_aifsn || \
src->wmm_param[3].ac_aci_acm_aifsn) {
memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
}
dst->QoS_Enable = src->QoS_Enable;
#else
dst->QoS_Enable = 1;//for Rtl8187 simulation
#endif
dst->SignalStrength = src->SignalStrength;
dst->Turbo_Enable = src->Turbo_Enable;
dst->CountryIeLen = src->CountryIeLen;
memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
}
inline void ieee80211_process_probe_response(
struct ieee80211_device *ieee,
struct ieee80211_probe_response *beacon,
struct ieee80211_rx_stats *stats)
{
struct ieee80211_network network;
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;
short renew;
u8 wmm_info;
u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON) ? 1 : 0; //YJ,add,080819,for hidden ap
memset(&network, 0, sizeof(struct ieee80211_network));
IEEE80211_DEBUG_SCAN(
"'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
escape_essid(info_element->data, info_element->len),
beacon->header.addr3,
(beacon->capability & (1<<0xf)) ? '1' : '0',
(beacon->capability & (1<<0xe)) ? '1' : '0',
(beacon->capability & (1<<0xd)) ? '1' : '0',
(beacon->capability & (1<<0xc)) ? '1' : '0',
(beacon->capability & (1<<0xb)) ? '1' : '0',
(beacon->capability & (1<<0xa)) ? '1' : '0',
(beacon->capability & (1<<0x9)) ? '1' : '0',
(beacon->capability & (1<<0x8)) ? '1' : '0',
(beacon->capability & (1<<0x7)) ? '1' : '0',
(beacon->capability & (1<<0x6)) ? '1' : '0',
(beacon->capability & (1<<0x5)) ? '1' : '0',
(beacon->capability & (1<<0x4)) ? '1' : '0',
(beacon->capability & (1<<0x3)) ? '1' : '0',
(beacon->capability & (1<<0x2)) ? '1' : '0',
(beacon->capability & (1<<0x1)) ? '1' : '0',
(beacon->capability & (1<<0x0)) ? '1' : '0');
if (ieee80211_network_init(ieee, beacon, &network, stats)) {
IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
escape_essid(info_element->data,
info_element->len),
beacon->header.addr3,
WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
IEEE80211_STYPE_PROBE_RESP ?
"PROBE RESPONSE" : "BEACON");
return;
}
// For Asus EeePc request,
// (1) if wireless adapter receive get any 802.11d country code in AP beacon,
// wireless adapter should follow the country code.
// (2) If there is no any country code in beacon,
// then wireless adapter should do active scan from ch1~11 and
// passive scan from ch12~14
if (ieee->bGlobalDomain) {
if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP) {
// Case 1: Country code
if (IS_COUNTRY_IE_VALID(ieee)) {
if (!IsLegalChannel(ieee, network.channel)) {
printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
return;
}
}
// Case 2: No any country code.
else {
// Filter over channel ch12~14
if (network.channel > 11) {
printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
return;
}
}
} else {
// Case 1: Country code
if (IS_COUNTRY_IE_VALID(ieee)) {
if (!IsLegalChannel(ieee, network.channel)) {
printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network.channel);
return;
}
}
// Case 2: No any country code.
else {
// Filter over channel ch12~14
if (network.channel > 14) {
printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network.channel);
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);
if (is_same_network(&ieee->current_network, &network, ieee)) {
wmm_info = ieee->current_network.wmm_info;
//YJ,add,080819,for hidden ap
if (is_beacon == 0)
network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
else if (ieee->state == IEEE80211_LINKED)
ieee->NumRxBcnInPeriod++;
//YJ,add,080819,for hidden ap,end
//printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid);
update_network(&ieee->current_network, &network);
}
list_for_each_entry(target, &ieee->network_list, list) {
if (is_same_network(target, &network, ieee))
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",
escape_essid(target->ssid,
target->ssid_len),
target->bssid);
} 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",
escape_essid(network.ssid,
network.ssid_len),
network.bssid,
WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
IEEE80211_STYPE_PROBE_RESP ?
"PROBE RESPONSE" : "BEACON");
#endif
memcpy(target, &network, sizeof(*target));
list_add_tail(&target->list, &ieee->network_list);
} else {
IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
escape_essid(target->ssid,
target->ssid_len),
target->bssid,
WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
IEEE80211_STYPE_PROBE_RESP ?
"PROBE RESPONSE" : "BEACON");
/* we have an entry and we are going to update it. But this entry may
* be already expired. In this case we do the same as we found a new
* net and call the new_net handler
*/
renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
//YJ,add,080819,for hidden ap
if (is_beacon == 0)
network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
//if(strncmp(network.ssid, "linksys-c",9) == 0)
// printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
if (((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
&& (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
|| ((ieee->current_network.ssid_len == network.ssid_len) && (strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK))))
renew = 1;
//YJ,add,080819,for hidden ap,end
update_network(target, &network);
}
spin_unlock_irqrestore(&ieee->lock, flags);
}
void ieee80211_rx_mgt(struct ieee80211_device *ieee,
struct ieee80211_hdr_4addr *header,
struct ieee80211_rx_stats *stats)
{
switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
case IEEE80211_STYPE_BEACON:
IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
WLAN_FC_GET_STYPE(header->frame_ctl));
IEEE80211_DEBUG_SCAN("Beacon\n");
ieee80211_process_probe_response(
ieee, (struct ieee80211_probe_response *)header, stats);
break;
case IEEE80211_STYPE_PROBE_RESP:
IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
WLAN_FC_GET_STYPE(header->frame_ctl));
IEEE80211_DEBUG_SCAN("Probe response\n");
ieee80211_process_probe_response(
ieee, (struct ieee80211_probe_response *)header, stats);
break;
}
}