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cos / third_party / kernel / refs/tags/upstream/v5.4.145 / . / drivers / staging / rtl8192u / ieee80211 / ieee80211_rx.c
blob: 00e34c392a3884b8b4ffabc97dfe1a7efdcafbd3 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* 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
******************************************************************************
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/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 rtl_80211_hdr_4addr *hdr = (struct rtl_80211_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 = 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 &&
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 && 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 rtl_80211_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 rtl_80211_hdr_3addrqos *hdr_3addrqos;
struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
u8 tid;
if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
tid = UP2AC(tid);
tid++;
} else if (IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_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 rtl_80211_hdr_4addr) +
8 /* LLC */ +
2 /* alignment */ +
8 /* WEP */ +
ETH_ALEN /* WDS */ +
(IEEE80211_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
if (!skb)
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)
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) {
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 rtl_80211_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 rtl_80211_hdr_3addrqos *hdr_3addrqos;
struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
u8 tid;
if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
tid = UP2AC(tid);
tid++;
} else if (IEEE80211_QOS_HAS_SEQ(fc)) {
hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
tid = UP2AC(tid);
tid++;
} else {
tid = 0;
}
entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
hdr->addr1);
if (!entry) {
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)
{
/* On the struct stats definition there is written that
* this is not mandatory.... but seems that the probe
* response parser uses it
*/
struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
rx_stats->len = skb->len;
ieee80211_rx_mgt(ieee, (struct rtl_80211_hdr_4addr *)skb->data, rx_stats);
/* if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) */
if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
/* use ADDR1 to perform address matching for Management frames */
dev_kfree_skb_any(skb);
return 0;
}
ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
dev_kfree_skb_any(skb);
return 0;
#ifdef NOT_YET
if (ieee->iw_mode == IW_MODE_MASTER) {
printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
ieee->dev->name);
return 0;
/*
hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
skb->data);*/
}
if (ieee->hostapd && type == IEEE80211_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, size_t hdrlen)
{
struct net_device *dev = ieee->dev;
u16 fc, ethertype;
struct rtl_80211_hdr_4addr *hdr;
u8 *pos;
if (skb->len < 24)
return 0;
hdr = (struct rtl_80211_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 rtl_80211_hdr_4addr *hdr;
int res, hdrlen;
if (!crypt || !crypt->ops->decrypt_mpdu)
return 0;
if (ieee->hwsec_active) {
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
tcb_desc->bHwSec = 1;
}
hdr = (struct rtl_80211_hdr_4addr *)skb->data;
hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
if (ieee->tkip_countermeasures &&
strcmp(crypt->ops->name, "TKIP") == 0) {
if (net_ratelimit()) {
printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
"received packet from %pM\n",
ieee->dev->name, hdr->addr2);
}
return -1;
}
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 rtl_80211_hdr_4addr *hdr;
int res, hdrlen;
if (!crypt || !crypt->ops->decrypt_msdu)
return 0;
if (ieee->hwsec_active) {
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
tcb_desc->bHwSec = 1;
}
hdr = (struct rtl_80211_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) {
printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
" (SA=%pM keyidx=%d)\n",
ieee->dev->name, 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 rtl_80211_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 rtl_80211_hdr_3addrqos *hdr_3addrqos;
struct rtl_80211_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 rtl_80211_hdr_4addrqos *)header;
tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
tid = UP2AC(tid);
tid++;
} else if (IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)header;
tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_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)
goto drop;
if (*last_frag + 1 != frag)
/* out-of-order fragment */
goto drop;
} else
*last_seq = seq;
*last_frag = frag;
*last_time = jiffies;
return 0;
drop:
// BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
return 1;
}
static bool AddReorderEntry(struct rx_ts_record *pTS, struct rx_reorder_entry *pReorderEntry)
{
struct list_head *pList = &pTS->rx_pending_pkt_list;
while (pList->next != &pTS->rx_pending_pkt_list) {
if (SN_LESS(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum))
pList = pList->next;
else if (SN_EQUAL(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum))
return false;
else
break;
}
pReorderEntry->List.next = pList->next;
pReorderEntry->List.next->prev = &pReorderEntry->List;
pReorderEntry->List.prev = pList;
pList->next = &pReorderEntry->List;
return true;
}
void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb **prxbIndicateArray, u8 index)
{
u8 i = 0, j = 0;
u16 ethertype;
// if(index > 1)
// IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__func__,index);
for (j = 0; j < index; j++) {
//added by amy for reorder
struct ieee80211_rxb *prxb = prxbIndicateArray[j];
for (i = 0; i < prxb->nr_subframes; i++) {
struct sk_buff *sub_skb = prxb->subframes[i];
/* convert hdr + possible LLC headers into Ethernet header */
ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
if (sub_skb->len >= 8 &&
((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
/* remove RFC1042 or Bridge-Tunnel encapsulation and
* replace EtherType */
skb_pull(sub_skb, SNAP_SIZE);
memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
} else {
/* Leave Ethernet header part of hdr and full payload */
put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2));
memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
}
//stats->rx_packets++;
//stats->rx_bytes += sub_skb->len;
/* Indicate the packets to upper layer */
if (sub_skb) {
sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
sub_skb->dev = ieee->dev;
sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
//skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
ieee->last_rx_ps_time = jiffies;
netif_rx(sub_skb);
}
}
kfree(prxb);
prxb = NULL;
}
}
static void RxReorderIndicatePacket(struct ieee80211_device *ieee,
struct ieee80211_rxb *prxb,
struct rx_ts_record *pTS, u16 SeqNum)
{
PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo;
struct rx_reorder_entry *pReorderEntry = NULL;
struct ieee80211_rxb **prxbIndicateArray;
u8 WinSize = pHTInfo->RxReorderWinSize;
u16 WinEnd = (pTS->rx_indicate_seq + WinSize - 1) % 4096;
u8 index = 0;
bool bMatchWinStart = false, bPktInBuf = false;
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Seq is %d,pTS->rx_indicate_seq is %d, WinSize is %d\n", __func__, SeqNum, pTS->rx_indicate_seq, WinSize);
prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE,
sizeof(struct ieee80211_rxb *),
GFP_ATOMIC);
if (!prxbIndicateArray)
return;
/* Rx Reorder initialize condition.*/
if (pTS->rx_indicate_seq == 0xffff)
pTS->rx_indicate_seq = SeqNum;
/* Drop out the packet which SeqNum is smaller than WinStart */
if (SN_LESS(SeqNum, pTS->rx_indicate_seq)) {
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
pTS->rx_indicate_seq, SeqNum);
pHTInfo->RxReorderDropCounter++;
{
int i;
for (i = 0; i < prxb->nr_subframes; i++) {
dev_kfree_skb(prxb->subframes[i]);
}
kfree(prxb);
prxb = NULL;
}
kfree(prxbIndicateArray);
return;
}
/*
* Sliding window manipulation. Conditions includes:
* 1. Incoming SeqNum is equal to WinStart =>Window shift 1
* 2. Incoming SeqNum is larger than the WinEnd => Window shift N
*/
if (SN_EQUAL(SeqNum, pTS->rx_indicate_seq)) {
pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
bMatchWinStart = true;
} else if (SN_LESS(WinEnd, SeqNum)) {
if (SeqNum >= (WinSize - 1)) {
pTS->rx_indicate_seq = SeqNum + 1 - WinSize;
} else {
pTS->rx_indicate_seq = 4095 - (WinSize - (SeqNum + 1)) + 1;
}
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
}
/*
* Indication process.
* After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
* with the SeqNum smaller than latest WinStart and buffer other packets.
*/
/* For Rx Reorder condition:
* 1. All packets with SeqNum smaller than WinStart => Indicate
* 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
*/
if (bMatchWinStart) {
/* Current packet is going to be indicated.*/
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
pTS->rx_indicate_seq, SeqNum);
prxbIndicateArray[0] = prxb;
// printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum);
index = 1;
} else {
/* Current packet is going to be inserted into pending list.*/
//IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__);
if (!list_empty(&ieee->RxReorder_Unused_List)) {
pReorderEntry = list_entry(ieee->RxReorder_Unused_List.next, struct rx_reorder_entry, List);
list_del_init(&pReorderEntry->List);
/* Make a reorder entry and insert into a the packet list.*/
pReorderEntry->SeqNum = SeqNum;
pReorderEntry->prxb = prxb;
// IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
if (!AddReorderEntry(pTS, pReorderEntry)) {
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
__func__, pTS->rx_indicate_seq, SeqNum);
list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List);
{
int i;
for (i = 0; i < prxb->nr_subframes; i++) {
dev_kfree_skb(prxb->subframes[i]);
}
kfree(prxb);
prxb = NULL;
}
} else {
IEEE80211_DEBUG(IEEE80211_DL_REORDER,
"Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
}
} else {
/*
* Packets are dropped if there is not enough reorder entries.
* This part shall be modified!! We can just indicate all the
* packets in buffer and get reorder entries.
*/
IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
{
int i;
for (i = 0; i < prxb->nr_subframes; i++) {
dev_kfree_skb(prxb->subframes[i]);
}
kfree(prxb);
prxb = NULL;
}
}
}
/* Check if there is any packet need indicate.*/
while (!list_empty(&pTS->rx_pending_pkt_list)) {
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
pReorderEntry = list_entry(pTS->rx_pending_pkt_list.prev, struct rx_reorder_entry, List);
if (SN_LESS(pReorderEntry->SeqNum, pTS->rx_indicate_seq) ||
SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) {
/* This protect buffer from overflow. */
if (index >= REORDER_WIN_SIZE) {
IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
bPktInBuf = true;
break;
}
list_del_init(&pReorderEntry->List);
if (SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq))
pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
prxbIndicateArray[index] = pReorderEntry->prxb;
// printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
index++;
list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List);
} else {
bPktInBuf = true;
break;
}
}
/* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
if (index > 0) {
// Cancel previous pending timer.
// del_timer_sync(&pTS->rx_pkt_pending_timer);
pTS->rx_timeout_indicate_seq = 0xffff;
// Indicate packets
if (index > REORDER_WIN_SIZE) {
IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder buffer full!! \n");
kfree(prxbIndicateArray);
return;
}
ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
}
if (bPktInBuf && pTS->rx_timeout_indicate_seq == 0xffff) {
// Set new pending timer.
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): SET rx timeout timer\n", __func__);
pTS->rx_timeout_indicate_seq = pTS->rx_indicate_seq;
if (timer_pending(&pTS->rx_pkt_pending_timer))
del_timer_sync(&pTS->rx_pkt_pending_timer);
pTS->rx_pkt_pending_timer.expires = jiffies +
msecs_to_jiffies(pHTInfo->RxReorderPendingTime);
add_timer(&pTS->rx_pkt_pending_timer);
}
kfree(prxbIndicateArray);
}
static u8 parse_subframe(struct sk_buff *skb,
struct ieee80211_rx_stats *rx_stats,
struct ieee80211_rxb *rxb, u8 *src, u8 *dst)
{
struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
u16 fc = le16_to_cpu(hdr->frame_ctl);
u16 LLCOffset = sizeof(struct rtl_80211_hdr_3addr);
u16 ChkLength;
bool bIsAggregateFrame = false;
u16 nSubframe_Length;
u8 nPadding_Length = 0;
u16 SeqNum = 0;
struct sk_buff *sub_skb;
/* just for debug purpose */
SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
if ((IEEE80211_QOS_HAS_SEQ(fc)) && \
(((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
bIsAggregateFrame = true;
}
if (IEEE80211_QOS_HAS_SEQ(fc)) {
LLCOffset += 2;
}
if (rx_stats->bContainHTC) {
LLCOffset += HTCLNG;
}
// Null packet, don't indicate it to upper layer
ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
if (skb->len <= ChkLength)
return 0;
skb_pull(skb, LLCOffset);
if (!bIsAggregateFrame) {
rxb->nr_subframes = 1;
#ifdef JOHN_NOCPY
rxb->subframes[0] = skb;
#else
rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
#endif
memcpy(rxb->src, src, ETH_ALEN);
memcpy(rxb->dst, dst, ETH_ALEN);
//IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
return 1;
} else {
rxb->nr_subframes = 0;
memcpy(rxb->src, src, ETH_ALEN);
memcpy(rxb->dst, dst, ETH_ALEN);
while (skb->len > ETHERNET_HEADER_SIZE) {
/* Offset 12 denote 2 mac address */
nSubframe_Length = *((u16 *)(skb->data + 12));
//==m==>change the length order
nSubframe_Length = (nSubframe_Length >> 8) + (nSubframe_Length << 8);
if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
__func__, rxb->nr_subframes);
printk("%s: A-MSDU parse error!! Subframe Length: %d\n", __func__, nSubframe_Length);
printk("nRemain_Length is %d and nSubframe_Length is : %d\n", skb->len, nSubframe_Length);
printk("The Packet SeqNum is %d\n", SeqNum);
return 0;
}
/* move the data point to data content */
skb_pull(skb, ETHERNET_HEADER_SIZE);
#ifdef JOHN_NOCPY
sub_skb = skb_clone(skb, GFP_ATOMIC);
sub_skb->len = nSubframe_Length;
sub_skb->tail = sub_skb->data + nSubframe_Length;
#else
/* Allocate new skb for releasing to upper layer */
sub_skb = dev_alloc_skb(nSubframe_Length + 12);
if (!sub_skb)
return 0;
skb_reserve(sub_skb, 12);
skb_put_data(sub_skb, skb->data, nSubframe_Length);
#endif
rxb->subframes[rxb->nr_subframes++] = sub_skb;
if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
break;
}
skb_pull(skb, nSubframe_Length);
if (skb->len != 0) {
nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
if (nPadding_Length == 4) {
nPadding_Length = 0;
}
if (skb->len < nPadding_Length) {
return 0;
}
skb_pull(skb, nPadding_Length);
}
}
#ifdef JOHN_NOCPY
dev_kfree_skb(skb);
#endif
//{just for debug added by david
//printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
//}
return rxb->nr_subframes;
}
}
/* 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 rtl_80211_hdr_4addr *hdr;
//struct rtl_80211_hdr_3addrqos *hdr;
size_t hdrlen;
u16 fc, type, stype, sc;
struct net_device_stats *stats;
unsigned int frag;
u16 ethertype;
//added by amy for reorder
u8 TID = 0;
u16 SeqNum = 0;
struct rx_ts_record *pTS = NULL;
//bool bIsAggregateFrame = false;
//added by amy for reorder
#ifdef NOT_YET
struct net_device *wds = NULL;
struct net_device *wds = NULL;
int from_assoc_ap = 0;
void *sta = NULL;
#endif
// u16 qos_ctl = 0;
u8 dst[ETH_ALEN];
u8 src[ETH_ALEN];
u8 bssid[ETH_ALEN];
struct ieee80211_crypt_data *crypt = NULL;
int keyidx = 0;
int i;
struct ieee80211_rxb *rxb = NULL;
// cheat the hdr type
hdr = (struct rtl_80211_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 (HTCCheck(ieee, skb->data)) {
if (net_ratelimit())
printk("find HTCControl\n");
hdrlen += 4;
rx_stats->bContainHTC = true;
}
//IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
#ifdef NOT_YET
/* Put this code here so that we avoid duplicating it in all
* Rx paths. - Jean II */
#ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
/* If spy monitoring on */
if (iface->spy_data.spy_number > 0) {
struct iw_quality wstats;
wstats.level = rx_stats->rssi;
wstats.noise = rx_stats->noise;
wstats.updated = 6; /* No qual value */
/* Update spy records */
wireless_spy_update(dev, hdr->addr2, &wstats);
}
#endif /* IW_WIRELESS_SPY */
hostap_update_rx_stats(local->ap, hdr, rx_stats);
#endif
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];
#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 || !crypt->ops->decrypt_mpdu))
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 ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active || !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) {
if (is_duplicate_packet(ieee, hdr))
goto rx_dropped;
} else {
struct rx_ts_record *pRxTS = NULL;
//IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid);
if (GetTs(
ieee,
(struct ts_common_info **)&pRxTS,
hdr->addr2,
Frame_QoSTID((u8 *)(skb->data)),
RX_DIR,
true)) {
// IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->rx_last_frag_num is %d,frag is %d,pRxTS->rx_last_seq_num is %d,seq is %d\n",__func__,pRxTS->rx_last_frag_num,frag,pRxTS->rx_last_seq_num,WLAN_GET_SEQ_SEQ(sc));
if ((fc & (1 << 11)) &&
(frag == pRxTS->rx_last_frag_num) &&
(WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) {
goto rx_dropped;
} else {
pRxTS->rx_last_frag_num = frag;
pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc);
}
} else {
IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n", __func__);
goto rx_dropped;
}
}
if (type == IEEE80211_FTYPE_MGMT) {
//IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
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;
default:
memcpy(dst, hdr->addr1, ETH_ALEN);
memcpy(src, hdr->addr2, ETH_ALEN);
memcpy(bssid, hdr->addr3, 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 &&
memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
/* 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;
}
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)) {
case AP_RX_CONTINUE_NOT_AUTHORIZED:
case AP_RX_CONTINUE:
break;
case AP_RX_DROP:
goto rx_dropped;
case AP_RX_EXIT:
goto rx_exit;
}
}
#endif
//IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
/* 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;
/* skb: hdr + (possibly fragmented, possibly encrypted) payload */
if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
(keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
printk("decrypt frame error\n");
goto rx_dropped;
}
hdr = (struct rtl_80211_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) {
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_put_data(frag_skb, skb->data, flen);
} else {
/* append frame payload to the end of the fragment
* cache skb */
skb_put_data(frag_skb, 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 rtl_80211_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)) {
printk("==>decrypt msdu error\n");
goto rx_dropped;
}
//added by amy for AP roaming
ieee->LinkDetectInfo.NumRecvDataInPeriod++;
ieee->LinkDetectInfo.NumRxOkInPeriod++;
hdr = (struct rtl_80211_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");
}
*/
//added by amy for reorder
if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
&& !is_multicast_ether_addr(hdr->addr1)) {
TID = Frame_QoSTID(skb->data);
SeqNum = WLAN_GET_SEQ_SEQ(sc);
GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true);
if (TID != 0 && TID != 3) {
ieee->bis_any_nonbepkts = true;
}
}
//added by amy for reorder
/* skb: hdr + (possible reassembled) full plaintext payload */
//ethertype = (payload[6] << 8) | payload[7];
rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
if (!rxb)
goto rx_dropped;
/* to parse amsdu packets */
/* qos data packets & reserved bit is 1 */
if (parse_subframe(skb, rx_stats, rxb, src, dst) == 0) {
/* only to free rxb, and not submit the packets to upper layer */
for (i = 0; i < rxb->nr_subframes; i++) {
dev_kfree_skb(rxb->subframes[i]);
}
kfree(rxb);
rxb = NULL;
goto rx_dropped;
}
//added by amy for reorder
if (!ieee->pHTInfo->bCurRxReorderEnable || !pTS) {
//added by amy for reorder
for (i = 0; i < rxb->nr_subframes; i++) {
struct sk_buff *sub_skb = rxb->subframes[i];
if (sub_skb) {
/* convert hdr + possible LLC headers into Ethernet header */
ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
if (sub_skb->len >= 8 &&
((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
/* remove RFC1042 or Bridge-Tunnel encapsulation and
* replace EtherType */
skb_pull(sub_skb, SNAP_SIZE);
memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
} else {
u16 len;
/* Leave Ethernet header part of hdr and full payload */
len = be16_to_cpu(htons(sub_skb->len));
memcpy(skb_push(sub_skb, 2), &len, 2);
memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
}
stats->rx_packets++;
stats->rx_bytes += sub_skb->len;
if (is_multicast_ether_addr(dst)) {
stats->multicast++;
}
/* Indicate the packets to upper layer */
sub_skb->protocol = eth_type_trans(sub_skb, dev);
memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
sub_skb->dev = dev;
sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
//skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
ieee->last_rx_ps_time = jiffies;
netif_rx(sub_skb);
}
}
kfree(rxb);
rxb = NULL;
} else {
IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n", __func__);
RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
}
#ifndef JOHN_NOCPY
dev_kfree_skb(skb);
#endif
rx_exit:
#ifdef NOT_YET
if (sta)
hostap_handle_sta_release(sta);
#endif
return 1;
rx_dropped:
kfree(rxb);
rxb = NULL;
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;
}
EXPORT_SYMBOL(ieee80211_rx);
#define MGMT_FRAME_FIXED_PART_LENGTH 0x24
static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
/*
* Make the structure we read from the beacon packet to have
* 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 || !element_param)
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)
return -1;
if (!info_element)
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 i;
struct ieee80211_qos_ac_parameter *ac_params;
u8 aci;
//u8 cw_min;
//u8 cw_max;
for (i = 0; i < QOS_QUEUE_NUM; i++) {
ac_params = &(param_elm->ac_params_record[i]);
aci = (ac_params->aci_aifsn & 0x60) >> 5;
if (aci >= QOS_QUEUE_NUM)
continue;
qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
/* WMM spec P.11: The minimum value for AIFSN shall be 2 */
qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
qos_param->cw_min[aci] =
cpu_to_le16(ac_params->ecw_min_max & 0x0F);
qos_param->cw_max[aci] =
cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
qos_param->flag[aci] =
(ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
}
return 0;
}
/*
* 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(&param_element,
info_element);
if (rc == 0) {
qos_param = &(network->qos_data.parameters);
ieee80211_qos_convert_ac_to_parameters(&param_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 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_update_country_ie(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);
}
}
}
int ieee80211_parse_info_param(struct ieee80211_device *ieee,
struct ieee80211_info_element *info_element,
u16 length,
struct ieee80211_network *network,
struct ieee80211_rx_stats *stats)
{
u8 i;
short offset;
u16 tmp_htcap_len = 0;
u16 tmp_htinfo_len = 0;
u16 ht_realtek_agg_len = 0;
u8 ht_realtek_agg_buf[MAX_IE_LEN];
// u16 broadcom_len = 0;
#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:
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_MGMT("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];
#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_ex[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:
if (info_element->len < 4)
break;
network->tim.tim_count = info_element->data[0];
network->tim.tim_period = info_element->data[1];
network->dtim_period = info_element->data[1];
if (ieee->state != IEEE80211_LINKED)
break;
network->last_dtim_sta_time[0] = stats->mac_time[0];
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;
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) ;
if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8)))
network->dtim_data |= IEEE80211_DTIM_UCAST;
//IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
break;
case MFIE_TYPE_ERP:
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;
}
#ifdef THOMAS_TURBO
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;
}
#endif
//for HTcap and HTinfo parameters
if (tmp_htcap_len == 0) {
if (info_element->len >= 4 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x90 &&
info_element->data[2] == 0x4c &&
info_element->data[3] == 0x033){
tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
if (tmp_htcap_len != 0) {
network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
}
}
if (tmp_htcap_len != 0)
network->bssht.bdSupportHT = true;
else
network->bssht.bdSupportHT = false;
}
if (tmp_htinfo_len == 0) {
if (info_element->len >= 4 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x90 &&
info_element->data[2] == 0x4c &&
info_element->data[3] == 0x034){
tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
if (tmp_htinfo_len != 0) {
network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
if (tmp_htinfo_len) {
network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
}
}
}
}
if (ieee->aggregation) {
if (network->bssht.bdSupportHT) {
if (info_element->len >= 4 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0xe0 &&
info_element->data[2] == 0x4c &&
info_element->data[3] == 0x02){
ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
}
if (ht_realtek_agg_len >= 5) {
network->bssht.bdRT2RTAggregation = true;
if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
network->bssht.bdRT2RTLongSlotTime = true;
}
}
}
//if(tmp_htcap_len !=0 || tmp_htinfo_len != 0)
{
if ((info_element->len >= 3 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x05 &&
info_element->data[2] == 0xb5) ||
(info_element->len >= 3 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x0a &&
info_element->data[2] == 0xf7) ||
(info_element->len >= 3 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x10 &&
info_element->data[2] == 0x18)){
network->broadcom_cap_exist = true;
}
}
if (info_element->len >= 3 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x0c &&
info_element->data[2] == 0x43) {
network->ralink_cap_exist = true;
} else
network->ralink_cap_exist = false;
//added by amy for atheros AP
if ((info_element->len >= 3 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x03 &&
info_element->data[2] == 0x7f) ||
(info_element->len >= 3 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x13 &&
info_element->data[2] == 0x74)) {
printk("========>%s(): athros AP is exist\n", __func__);
network->atheros_cap_exist = true;
} else
network->atheros_cap_exist = false;
if (info_element->len >= 3 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x40 &&
info_element->data[2] == 0x96) {
network->cisco_cap_exist = true;
} else
network->cisco_cap_exist = false;
//added by amy for LEAP of cisco
if (info_element->len > 4 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x40 &&
info_element->data[2] == 0x96 &&
info_element->data[3] == 0x01) {
if (info_element->len == 6) {
memcpy(network->CcxRmState, &info_element[4], 2);
if (network->CcxRmState[0] != 0)
network->bCcxRmEnable = true;
else
network->bCcxRmEnable = false;
//
// CCXv4 Table 59-1 MBSSID Masks.
//
network->MBssidMask = network->CcxRmState[1] & 0x07;
if (network->MBssidMask != 0) {
network->bMBssidValid = true;
network->MBssidMask = 0xff << (network->MBssidMask);
ether_addr_copy(network->MBssid, network->bssid);
network->MBssid[5] &= network->MBssidMask;
} else {
network->bMBssidValid = false;
}
} else {
network->bCcxRmEnable = false;
}
}
if (info_element->len > 4 &&
info_element->data[0] == 0x00 &&
info_element->data[1] == 0x40 &&
info_element->data[2] == 0x96 &&
info_element->data[3] == 0x03) {
if (info_element->len == 5) {
network->bWithCcxVerNum = true;
network->BssCcxVerNumber = info_element->data[4];
} else {
network->bWithCcxVerNum = false;
network->BssCcxVerNumber = 0;
}
}
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;
//HT related element.
case MFIE_TYPE_HT_CAP:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
info_element->len);
tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
if (tmp_htcap_len != 0) {
network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
//If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
// windows driver will update WMM parameters each beacon received once connected
// Linux driver is a bit different.
network->bssht.bdSupportHT = true;
} else
network->bssht.bdSupportHT = false;
break;
case MFIE_TYPE_HT_INFO:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
info_element->len);
tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
if (tmp_htinfo_len) {
network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
}
break;
case MFIE_TYPE_AIRONET:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
info_element->len);
if (info_element->len > IE_CISCO_FLAG_POSITION) {
network->bWithAironetIE = true;
// CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
// "A Cisco access point advertises support for CKIP in beacon and probe response packets,
// by adding an Aironet element and setting one or both of the CKIP negotiation bits."
if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC) ||
(info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) {
network->bCkipSupported = true;
} else {
network->bCkipSupported = false;
}
} else {
network->bWithAironetIE = false;
network->bCkipSupported = false;
}
break;
case MFIE_TYPE_QOS_PARAMETER:
printk(KERN_ERR
"QoS Error need to parse QOS_PARAMETER IE\n");
break;
case MFIE_TYPE_COUNTRY:
IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
info_element->len);
ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
break;
/* TODO */
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];
}
if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
!network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) {
network->unknown_cap_exist = true;
} else {
network->unknown_cap_exist = false;
}
return 0;
}
static inline u8 ieee80211_SignalStrengthTranslate(
u8 CurrSS
)
{
u8 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;
}
/* 0-100 index */
static long ieee80211_translate_todbm(u8 signal_strength_index)
{
long signal_power; // in dBm.
// Translate to dBm (x=0.5y-95).
signal_power = (long)((signal_strength_index + 1) >> 1);
signal_power -= 95;
return signal_power;
}
static 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
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;
network->berp_info_valid = false;
network->broadcom_cap_exist = false;
network->ralink_cap_exist = false;
network->atheros_cap_exist = false;
network->cisco_cap_exist = false;
network->unknown_cap_exist = false;
#ifdef THOMAS_TURBO
network->Turbo_Enable = 0;
#endif
network->CountryIeLen = 0;
memset(network->CountryIeBuf, 0, MAX_IE_LEN);
//Initialize HT parameters
//ieee80211_ht_initialize(&network->bssht);
HTInitializeBssDesc(&network->bssht);
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
(ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats))
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",
escape_essid(network->ssid,
network->ssid_len),
network->bssid);
return 1;
}
if (network->bssht.bdSupportHT) {
if (network->mode == IEEE_A)
network->mode = IEEE_N_5G;
else if (network->mode & (IEEE_G | IEEE_B))
network->mode = IEEE_N_24G;
}
if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
network->flags |= NETWORK_EMPTY_ESSID;
stats->signal = 30 + (stats->SignalStrength * 70) / 100;
//stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 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) &&
(((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
(src->channel == dst->channel) &&
!memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
//!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
(!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
((src->capability & WLAN_CAPABILITY_IBSS) ==
(dst->capability & WLAN_CAPABILITY_IBSS)) &&
((src->capability & WLAN_CAPABILITY_BSS) ==
(dst->capability & WLAN_CAPABILITY_BSS)));
}
static inline void update_network(struct ieee80211_network *dst,
struct ieee80211_network *src)
{
int qos_active;
u8 old_param;
memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
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;
if (src->ssid_len > 0) {
memset(dst->ssid, 0, dst->ssid_len);
dst->ssid_len = src->ssid_len;
memcpy(dst->ssid, src->ssid, src->ssid_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];
if (src->flags & NETWORK_HAS_ERP_VALUE) {
dst->erp_value = src->erp_value;
dst->berp_info_valid = src->berp_info_valid = true;
}
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];
memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen);
dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen);
dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
dst->broadcom_cap_exist = src->broadcom_cap_exist;
dst->ralink_cap_exist = src->ralink_cap_exist;
dst->atheros_cap_exist = src->atheros_cap_exist;
dst->cisco_cap_exist = src->cisco_cap_exist;
dst->unknown_cap_exist = src->unknown_cap_exist;
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 related parameters */
//qos_active = src->qos_data.active;
qos_active = dst->qos_data.active;
//old_param = dst->qos_data.old_param_count;
old_param = dst->qos_data.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) {
dst->QoS_Enable = 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 */
dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
if (src->wmm_param[0].aci_aifsn || \
src->wmm_param[1].aci_aifsn || \
src->wmm_param[2].aci_aifsn || \
src->wmm_param[3].aci_aifsn) {
memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
}
//dst->QoS_Enable = src->QoS_Enable;
#ifdef THOMAS_TURBO
dst->Turbo_Enable = src->Turbo_Enable;
#endif
dst->CountryIeLen = src->CountryIeLen;
memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
//added by amy for LEAP
dst->bWithAironetIE = src->bWithAironetIE;
dst->bCkipSupported = src->bCkipSupported;
memcpy(dst->CcxRmState, src->CcxRmState, 2);
dst->bCcxRmEnable = src->bCcxRmEnable;
dst->MBssidMask = src->MBssidMask;
dst->bMBssidValid = src->bMBssidValid;
memcpy(dst->MBssid, src->MBssid, 6);
dst->bWithCcxVerNum = src->bWithCcxVerNum;
dst->BssCcxVerNumber = src->BssCcxVerNumber;
}
static inline int is_beacon(__le16 fc)
{
return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
}
static 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[0];
#endif
int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl));
unsigned long flags;
short renew;
u16 capability;
//u8 wmm_info;
network = kzalloc(sizeof(*network), GFP_ATOMIC);
if (!network)
goto out;
capability = le16_to_cpu(beacon->capability);
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,
(capability & BIT(0xf)) ? '1' : '0',
(capability & BIT(0xe)) ? '1' : '0',
(capability & BIT(0xd)) ? '1' : '0',
(capability & BIT(0xc)) ? '1' : '0',
(capability & BIT(0xb)) ? '1' : '0',
(capability & BIT(0xa)) ? '1' : '0',
(capability & BIT(0x9)) ? '1' : '0',
(capability & BIT(0x8)) ? '1' : '0',
(capability & BIT(0x7)) ? '1' : '0',
(capability & BIT(0x6)) ? '1' : '0',
(capability & BIT(0x5)) ? '1' : '0',
(capability & BIT(0x4)) ? '1' : '0',
(capability & BIT(0x3)) ? '1' : '0',
(capability & BIT(0x2)) ? '1' : '0',
(capability & BIT(0x1)) ? '1' : '0',
(capability & BIT(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,
fc == IEEE80211_STYPE_PROBE_RESP ?
"PROBE RESPONSE" : "BEACON");
goto out;
}
// 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 (!is_legal_channel(ieee, network->channel))
goto out;
if (ieee->bGlobalDomain) {
if (fc == IEEE80211_STYPE_PROBE_RESP) {
if (IS_COUNTRY_IE_VALID(ieee)) {
// Case 1: Country code
if (!is_legal_channel(ieee, network->channel)) {
printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel);
goto out;
}
} else {
// Case 2: No any country code.
// Filter over channel ch12~14
if (network->channel > 11) {
printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel);
goto out;
}
}
} else {
if (IS_COUNTRY_IE_VALID(ieee)) {
// Case 1: Country code
if (!is_legal_channel(ieee, network->channel)) {
printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel);
goto out;
}
} else {
// Case 2: No any country code.
// Filter over channel ch12~14
if (network->channel > 14) {
printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel);
goto out;
}
}
}
}
/* 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)) {
update_network(&ieee->current_network, network);
if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
&& ieee->current_network.berp_info_valid){
if (ieee->current_network.erp_value & ERP_UseProtection)
ieee->current_network.buseprotection = true;
else
ieee->current_network.buseprotection = false;
}
if (is_beacon(beacon->header.frame_ctl)) {
if (ieee->state == IEEE80211_LINKED)
ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
} else //hidden AP
network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags);
}
list_for_each_entry(target, &ieee->network_list, list) {
if (is_same_network(target, network, ieee))
break;
if (!oldest ||
(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,
fc == IEEE80211_STYPE_PROBE_RESP ?
"PROBE RESPONSE" : "BEACON");
#endif
memcpy(target, network, sizeof(*target));
list_add_tail(&target->list, &ieee->network_list);
if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
ieee80211_softmac_new_net(ieee, network);
} else {
IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
escape_essid(target->ssid,
target->ssid_len),
target->bssid,
fc == 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(beacon->header.frame_ctl) == 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);
if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
ieee80211_softmac_new_net(ieee, network);
}
spin_unlock_irqrestore(&ieee->lock, flags);
if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \
(ieee->state == IEEE80211_LINKED)) {
if (ieee->handle_beacon)
ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network);
}
out:
kfree(network);
}
void ieee80211_rx_mgt(struct ieee80211_device *ieee,
struct rtl_80211_hdr_4addr *header,
struct ieee80211_rx_stats *stats)
{
switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
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_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;
}
}
EXPORT_SYMBOL(ieee80211_rx_mgt);