2 * Original code based Host AP (software wireless LAN access point) driver
3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
8 * Copyright (c) 2004, Intel Corporation
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation. See README and COPYING for
14 ******************************************************************************
16 Few modifications for Realtek's Wi-Fi drivers by
17 Andrea Merello <andrea.merello@gmail.com>
19 A special thanks goes to Realtek for their support !
21 ******************************************************************************/
24 #include <linux/compiler.h>
25 #include <linux/errno.h>
26 #include <linux/if_arp.h>
27 #include <linux/in6.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/netdevice.h>
33 #include <linux/pci.h>
34 #include <linux/proc_fs.h>
35 #include <linux/skbuff.h>
36 #include <linux/slab.h>
37 #include <linux/tcp.h>
38 #include <linux/types.h>
39 #include <linux/wireless.h>
40 #include <linux/etherdevice.h>
41 #include <linux/uaccess.h>
42 #include <linux/ctype.h>
47 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
49 struct rtllib_rx_stats *rx_status,
53 skb_reset_mac_header(skb);
54 skb_pull(skb, hdr_length);
55 skb->pkt_type = PACKET_OTHERHOST;
56 skb->protocol = htons(ETH_P_80211_RAW);
57 memset(skb->cb, 0, sizeof(skb->cb));
61 /* Called only as a tasklet (software IRQ) */
62 static struct rtllib_frag_entry *
63 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
64 unsigned int frag, u8 tid, u8 *src, u8 *dst)
66 struct rtllib_frag_entry *entry;
69 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
70 entry = &ieee->frag_cache[tid][i];
71 if (entry->skb != NULL &&
72 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
74 "expiring fragment cache entry seq=%u last_frag=%u\n",
75 entry->seq, entry->last_frag);
76 dev_kfree_skb_any(entry->skb);
80 if (entry->skb != NULL && entry->seq == seq &&
81 (entry->last_frag + 1 == frag || frag == -1) &&
82 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
83 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
90 /* Called only as a tasklet (software IRQ) */
91 static struct sk_buff *
92 rtllib_frag_cache_get(struct rtllib_device *ieee,
93 struct rtllib_hdr_4addr *hdr)
95 struct sk_buff *skb = NULL;
96 u16 fc = le16_to_cpu(hdr->frame_ctl);
97 u16 sc = le16_to_cpu(hdr->seq_ctl);
98 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
99 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
100 struct rtllib_frag_entry *entry;
101 struct rtllib_hdr_3addrqos *hdr_3addrqos;
102 struct rtllib_hdr_4addrqos *hdr_4addrqos;
105 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
106 RTLLIB_QOS_HAS_SEQ(fc)) {
107 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
108 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
111 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
112 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
113 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
121 /* Reserve enough space to fit maximum frame length */
122 skb = dev_alloc_skb(ieee->dev->mtu +
123 sizeof(struct rtllib_hdr_4addr) +
129 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0));
133 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
134 ieee->frag_next_idx[tid]++;
135 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
136 ieee->frag_next_idx[tid] = 0;
138 if (entry->skb != NULL)
139 dev_kfree_skb_any(entry->skb);
141 entry->first_frag_time = jiffies;
143 entry->last_frag = frag;
145 ether_addr_copy(entry->src_addr, hdr->addr2);
146 ether_addr_copy(entry->dst_addr, hdr->addr1);
148 /* received a fragment of a frame for which the head fragment
149 * should have already been received
151 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
154 entry->last_frag = frag;
163 /* Called only as a tasklet (software IRQ) */
164 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
165 struct rtllib_hdr_4addr *hdr)
167 u16 fc = le16_to_cpu(hdr->frame_ctl);
168 u16 sc = le16_to_cpu(hdr->seq_ctl);
169 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
170 struct rtllib_frag_entry *entry;
171 struct rtllib_hdr_3addrqos *hdr_3addrqos;
172 struct rtllib_hdr_4addrqos *hdr_4addrqos;
175 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
176 RTLLIB_QOS_HAS_SEQ(fc)) {
177 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
178 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
181 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
182 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
183 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
190 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
194 netdev_dbg(ieee->dev,
195 "Couldn't invalidate fragment cache entry (seq=%u)\n",
204 /* rtllib_rx_frame_mgtmt
206 * Responsible for handling management control frames
208 * Called by rtllib_rx
211 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
212 struct rtllib_rx_stats *rx_stats, u16 type,
215 /* On the struct stats definition there is written that
216 * this is not mandatory.... but seems that the probe
217 * response parser uses it
219 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
221 rx_stats->len = skb->len;
222 rtllib_rx_mgt(ieee, skb, rx_stats);
223 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
224 dev_kfree_skb_any(skb);
227 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
229 dev_kfree_skb_any(skb);
234 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation
235 * Ethernet-II snap header (RFC1042 for most EtherTypes)
237 static unsigned char rfc1042_header[] = {
238 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
240 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
241 static unsigned char bridge_tunnel_header[] = {
242 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
244 /* No encapsulation header if EtherType < 0x600 (=length) */
246 /* Called by rtllib_rx_frame_decrypt */
247 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
248 struct sk_buff *skb, size_t hdrlen)
250 struct net_device *dev = ieee->dev;
252 struct rtllib_hdr_4addr *hdr;
258 hdr = (struct rtllib_hdr_4addr *) skb->data;
259 fc = le16_to_cpu(hdr->frame_ctl);
261 /* check that the frame is unicast frame to us */
262 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
264 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
265 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
266 /* ToDS frame with own addr BSSID and DA */
267 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
268 RTLLIB_FCTL_FROMDS &&
269 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
270 /* FromDS frame with own addr as DA */
274 if (skb->len < 24 + 8)
277 /* check for port access entity Ethernet type */
278 pos = skb->data + hdrlen;
279 ethertype = (pos[6] << 8) | pos[7];
280 if (ethertype == ETH_P_PAE)
286 /* Called only as a tasklet (software IRQ), by rtllib_rx */
288 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
289 struct lib80211_crypt_data *crypt)
291 struct rtllib_hdr_4addr *hdr;
294 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
297 if (ieee->hwsec_active) {
298 struct cb_desc *tcb_desc = (struct cb_desc *)
299 (skb->cb + MAX_DEV_ADDR_SIZE);
301 tcb_desc->bHwSec = 1;
303 if (ieee->need_sw_enc)
304 tcb_desc->bHwSec = 0;
307 hdr = (struct rtllib_hdr_4addr *) skb->data;
308 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
310 atomic_inc(&crypt->refcnt);
311 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
312 atomic_dec(&crypt->refcnt);
314 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n",
317 netdev_dbg(ieee->dev,
318 "Decryption failed ICV mismatch (key %d)\n",
319 skb->data[hdrlen + 3] >> 6);
320 ieee->ieee_stats.rx_discards_undecryptable++;
328 /* Called only as a tasklet (software IRQ), by rtllib_rx */
330 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
331 int keyidx, struct lib80211_crypt_data *crypt)
333 struct rtllib_hdr_4addr *hdr;
336 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
338 if (ieee->hwsec_active) {
339 struct cb_desc *tcb_desc = (struct cb_desc *)
340 (skb->cb + MAX_DEV_ADDR_SIZE);
342 tcb_desc->bHwSec = 1;
344 if (ieee->need_sw_enc)
345 tcb_desc->bHwSec = 0;
348 hdr = (struct rtllib_hdr_4addr *) skb->data;
349 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
351 atomic_inc(&crypt->refcnt);
352 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
353 atomic_dec(&crypt->refcnt);
355 netdev_dbg(ieee->dev,
356 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
365 /* this function is stolen from ipw2200 driver*/
366 #define IEEE_PACKET_RETRY_TIME (5*HZ)
367 static int is_duplicate_packet(struct rtllib_device *ieee,
368 struct rtllib_hdr_4addr *header)
370 u16 fc = le16_to_cpu(header->frame_ctl);
371 u16 sc = le16_to_cpu(header->seq_ctl);
372 u16 seq = WLAN_GET_SEQ_SEQ(sc);
373 u16 frag = WLAN_GET_SEQ_FRAG(sc);
374 u16 *last_seq, *last_frag;
375 unsigned long *last_time;
376 struct rtllib_hdr_3addrqos *hdr_3addrqos;
377 struct rtllib_hdr_4addrqos *hdr_4addrqos;
380 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
381 RTLLIB_QOS_HAS_SEQ(fc)) {
382 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
383 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
386 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
387 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
388 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
395 switch (ieee->iw_mode) {
399 struct ieee_ibss_seq *entry = NULL;
400 u8 *mac = header->addr2;
401 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
403 list_for_each(p, &ieee->ibss_mac_hash[index]) {
404 entry = list_entry(p, struct ieee_ibss_seq, list);
405 if (!memcmp(entry->mac, mac, ETH_ALEN))
408 if (p == &ieee->ibss_mac_hash[index]) {
409 entry = kmalloc(sizeof(struct ieee_ibss_seq),
414 ether_addr_copy(entry->mac, mac);
415 entry->seq_num[tid] = seq;
416 entry->frag_num[tid] = frag;
417 entry->packet_time[tid] = jiffies;
418 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
421 last_seq = &entry->seq_num[tid];
422 last_frag = &entry->frag_num[tid];
423 last_time = &entry->packet_time[tid];
428 last_seq = &ieee->last_rxseq_num[tid];
429 last_frag = &ieee->last_rxfrag_num[tid];
430 last_time = &ieee->last_packet_time[tid];
436 if ((*last_seq == seq) &&
437 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
438 if (*last_frag == frag)
440 if (*last_frag + 1 != frag)
441 /* out-of-order fragment */
447 *last_time = jiffies;
455 static bool AddReorderEntry(struct rx_ts_record *pTS,
456 struct rx_reorder_entry *pReorderEntry)
458 struct list_head *pList = &pTS->RxPendingPktList;
460 while (pList->next != &pTS->RxPendingPktList) {
461 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
462 list_entry(pList->next, struct rx_reorder_entry,
465 else if (SN_EQUAL(pReorderEntry->SeqNum,
466 ((struct rx_reorder_entry *)list_entry(pList->next,
467 struct rx_reorder_entry, List))->SeqNum))
472 pReorderEntry->List.next = pList->next;
473 pReorderEntry->List.next->prev = &pReorderEntry->List;
474 pReorderEntry->List.prev = pList;
475 pList->next = &pReorderEntry->List;
480 void rtllib_indicate_packets(struct rtllib_device *ieee,
481 struct rtllib_rxb **prxbIndicateArray, u8 index)
483 struct net_device_stats *stats = &ieee->stats;
487 for (j = 0; j < index; j++) {
488 struct rtllib_rxb *prxb = prxbIndicateArray[j];
490 for (i = 0; i < prxb->nr_subframes; i++) {
491 struct sk_buff *sub_skb = prxb->subframes[i];
493 /* convert hdr + possible LLC headers into Ethernet header */
494 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
495 if (sub_skb->len >= 8 &&
496 ((memcmp(sub_skb->data, rfc1042_header,
498 ethertype != ETH_P_AARP &&
499 ethertype != ETH_P_IPX) ||
500 memcmp(sub_skb->data, bridge_tunnel_header,
502 /* remove RFC1042 or Bridge-Tunnel encapsulation
503 * and replace EtherType
505 skb_pull(sub_skb, SNAP_SIZE);
506 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
507 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
510 /* Leave Ethernet header part of hdr and full payload */
512 memcpy(skb_push(sub_skb, 2), &len, 2);
513 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
514 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
517 /* Indicate the packets to upper layer */
520 stats->rx_bytes += sub_skb->len;
522 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
523 sub_skb->protocol = eth_type_trans(sub_skb,
525 sub_skb->dev = ieee->dev;
526 sub_skb->dev->stats.rx_packets++;
527 sub_skb->dev->stats.rx_bytes += sub_skb->len;
528 /* 802.11 crc not sufficient */
529 sub_skb->ip_summed = CHECKSUM_NONE;
530 ieee->last_rx_ps_time = jiffies;
539 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,
540 struct rx_ts_record *pTS)
542 struct rx_reorder_entry *pRxReorderEntry;
545 del_timer_sync(&pTS->RxPktPendingTimer);
546 while (!list_empty(&pTS->RxPendingPktList)) {
547 if (RfdCnt >= REORDER_WIN_SIZE) {
548 netdev_info(ieee->dev,
549 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
554 pRxReorderEntry = (struct rx_reorder_entry *)
555 list_entry(pTS->RxPendingPktList.prev,
556 struct rx_reorder_entry, List);
557 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__,
558 pRxReorderEntry->SeqNum);
559 list_del_init(&pRxReorderEntry->List);
561 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
564 list_add_tail(&pRxReorderEntry->List,
565 &ieee->RxReorder_Unused_List);
567 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
569 pTS->RxIndicateSeq = 0xffff;
572 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
573 struct rtllib_rxb *prxb,
574 struct rx_ts_record *pTS, u16 SeqNum)
576 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
577 struct rx_reorder_entry *pReorderEntry = NULL;
578 u8 WinSize = pHTInfo->RxReorderWinSize;
581 bool bMatchWinStart = false, bPktInBuf = false;
584 netdev_dbg(ieee->dev,
585 "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n",
586 __func__, SeqNum, pTS->RxIndicateSeq, WinSize);
588 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
590 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
591 /* Rx Reorder initialize condition.*/
592 if (pTS->RxIndicateSeq == 0xffff)
593 pTS->RxIndicateSeq = SeqNum;
595 /* Drop out the packet which SeqNum is smaller than WinStart */
596 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
597 netdev_dbg(ieee->dev,
598 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
599 pTS->RxIndicateSeq, SeqNum);
600 pHTInfo->RxReorderDropCounter++;
604 for (i = 0; i < prxb->nr_subframes; i++)
605 dev_kfree_skb(prxb->subframes[i]);
609 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
613 /* Sliding window manipulation. Conditions includes:
614 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
615 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
617 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
618 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
619 bMatchWinStart = true;
620 } else if (SN_LESS(WinEnd, SeqNum)) {
621 if (SeqNum >= (WinSize - 1))
622 pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
624 pTS->RxIndicateSeq = 4095 -
625 (WinSize - (SeqNum + 1)) + 1;
626 netdev_dbg(ieee->dev,
627 "Window Shift! IndicateSeq: %d, NewSeq: %d\n",
628 pTS->RxIndicateSeq, SeqNum);
631 /* Indication process.
632 * After Packet dropping and Sliding Window shifting as above, we can
633 * now just indicate the packets with the SeqNum smaller than latest
634 * WinStart and struct buffer other packets.
636 * For Rx Reorder condition:
637 * 1. All packets with SeqNum smaller than WinStart => Indicate
638 * 2. All packets with SeqNum larger than or equal to
639 * WinStart => Buffer it.
641 if (bMatchWinStart) {
642 /* Current packet is going to be indicated.*/
643 netdev_dbg(ieee->dev,
644 "Packets indication! IndicateSeq: %d, NewSeq: %d\n",
645 pTS->RxIndicateSeq, SeqNum);
646 ieee->prxbIndicateArray[0] = prxb;
649 /* Current packet is going to be inserted into pending list.*/
650 if (!list_empty(&ieee->RxReorder_Unused_List)) {
651 pReorderEntry = (struct rx_reorder_entry *)
652 list_entry(ieee->RxReorder_Unused_List.next,
653 struct rx_reorder_entry, List);
654 list_del_init(&pReorderEntry->List);
656 /* Make a reorder entry and insert
657 * into a the packet list.
659 pReorderEntry->SeqNum = SeqNum;
660 pReorderEntry->prxb = prxb;
662 if (!AddReorderEntry(pTS, pReorderEntry)) {
665 netdev_dbg(ieee->dev,
666 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n",
667 __func__, pTS->RxIndicateSeq,
669 list_add_tail(&pReorderEntry->List,
670 &ieee->RxReorder_Unused_List);
672 for (i = 0; i < prxb->nr_subframes; i++)
673 dev_kfree_skb(prxb->subframes[i]);
677 netdev_dbg(ieee->dev,
678 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n",
679 pTS->RxIndicateSeq, SeqNum);
682 /* Packets are dropped if there are not enough reorder
683 * entries. This part should be modified!! We can just
684 * indicate all the packets in struct buffer and get
687 netdev_err(ieee->dev,
688 "%s(): There is no reorder entry! Packet is dropped!\n",
693 for (i = 0; i < prxb->nr_subframes; i++)
694 dev_kfree_skb(prxb->subframes[i]);
701 /* Check if there is any packet need indicate.*/
702 while (!list_empty(&pTS->RxPendingPktList)) {
703 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n",
706 pReorderEntry = (struct rx_reorder_entry *)
707 list_entry(pTS->RxPendingPktList.prev,
708 struct rx_reorder_entry,
710 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
711 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
712 /* This protect struct buffer from overflow. */
713 if (index >= REORDER_WIN_SIZE) {
714 netdev_err(ieee->dev,
715 "%s(): Buffer overflow!\n",
721 list_del_init(&pReorderEntry->List);
723 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
724 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) %
727 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
728 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n",
729 __func__, pReorderEntry->SeqNum);
732 list_add_tail(&pReorderEntry->List,
733 &ieee->RxReorder_Unused_List);
740 /* Handling pending timer. Set this timer to prevent from long time
744 if (timer_pending(&pTS->RxPktPendingTimer))
745 del_timer_sync(&pTS->RxPktPendingTimer);
746 pTS->RxTimeoutIndicateSeq = 0xffff;
748 if (index > REORDER_WIN_SIZE) {
749 netdev_err(ieee->dev,
750 "%s(): Rx Reorder struct buffer full!\n",
752 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
756 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
760 if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
761 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__);
762 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
763 mod_timer(&pTS->RxPktPendingTimer, jiffies +
764 msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
766 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
769 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
770 struct rtllib_rx_stats *rx_stats,
771 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
773 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
774 u16 fc = le16_to_cpu(hdr->frame_ctl);
776 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
778 bool bIsAggregateFrame = false;
779 u16 nSubframe_Length;
780 u8 nPadding_Length = 0;
782 struct sk_buff *sub_skb;
784 /* just for debug purpose */
785 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
786 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
787 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
788 bIsAggregateFrame = true;
790 if (RTLLIB_QOS_HAS_SEQ(fc))
792 if (rx_stats->bContainHTC)
793 LLCOffset += sHTCLng;
795 ChkLength = LLCOffset;
797 if (skb->len <= ChkLength)
800 skb_pull(skb, LLCOffset);
801 ieee->bIsAggregateFrame = bIsAggregateFrame;
802 if (!bIsAggregateFrame) {
803 rxb->nr_subframes = 1;
805 /* altered by clark 3/30/2010
806 * The struct buffer size of the skb indicated to upper layer
807 * must be less than 5000, or the defraged IP datagram
808 * in the IP layer will exceed "ipfrag_high_tresh" and be
809 * discarded. so there must not use the function
810 * "skb_copy" and "skb_clone" for "skb".
813 /* Allocate new skb for releasing to upper layer */
814 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
817 skb_reserve(sub_skb, 12);
818 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
819 memcpy(data_ptr, skb->data, skb->len);
820 sub_skb->dev = ieee->dev;
822 rxb->subframes[0] = sub_skb;
824 memcpy(rxb->src, src, ETH_ALEN);
825 memcpy(rxb->dst, dst, ETH_ALEN);
826 rxb->subframes[0]->dev = ieee->dev;
830 rxb->nr_subframes = 0;
831 memcpy(rxb->src, src, ETH_ALEN);
832 memcpy(rxb->dst, dst, ETH_ALEN);
833 while (skb->len > ETHERNET_HEADER_SIZE) {
834 /* Offset 12 denote 2 mac address */
835 nSubframe_Length = *((u16 *)(skb->data + 12));
836 nSubframe_Length = (nSubframe_Length >> 8) +
837 (nSubframe_Length << 8);
839 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
840 netdev_info(ieee->dev,
841 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
842 __func__, rxb->nr_subframes);
843 netdev_info(ieee->dev,
844 "%s: A-MSDU parse error!! Subframe Length: %d\n",
845 __func__, nSubframe_Length);
846 netdev_info(ieee->dev,
847 "nRemain_Length is %d and nSubframe_Length is : %d\n",
848 skb->len, nSubframe_Length);
849 netdev_info(ieee->dev,
850 "The Packet SeqNum is %d\n",
855 /* move the data point to data content */
856 skb_pull(skb, ETHERNET_HEADER_SIZE);
858 /* altered by clark 3/30/2010
859 * The struct buffer size of the skb indicated to upper layer
860 * must be less than 5000, or the defraged IP datagram
861 * in the IP layer will exceed "ipfrag_high_tresh" and be
862 * discarded. so there must not use the function
863 * "skb_copy" and "skb_clone" for "skb".
866 /* Allocate new skb for releasing to upper layer */
867 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
870 skb_reserve(sub_skb, 12);
871 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
872 memcpy(data_ptr, skb->data, nSubframe_Length);
874 sub_skb->dev = ieee->dev;
875 rxb->subframes[rxb->nr_subframes++] = sub_skb;
876 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
877 netdev_dbg(ieee->dev,
878 "ParseSubframe(): Too many Subframes! Packets dropped!\n");
881 skb_pull(skb, nSubframe_Length);
884 nPadding_Length = 4 - ((nSubframe_Length +
885 ETHERNET_HEADER_SIZE) % 4);
886 if (nPadding_Length == 4)
889 if (skb->len < nPadding_Length)
892 skb_pull(skb, nPadding_Length);
896 return rxb->nr_subframes;
900 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
902 struct rtllib_rx_stats *rx_stats)
904 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
905 u16 fc = le16_to_cpu(hdr->frame_ctl);
908 hdrlen = rtllib_get_hdrlen(fc);
909 if (HTCCheck(ieee, skb->data)) {
911 netdev_info(ieee->dev, "%s: find HTCControl!\n",
914 rx_stats->bContainHTC = true;
917 if (RTLLIB_QOS_HAS_SEQ(fc))
918 rx_stats->bIsQosData = true;
923 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
924 struct sk_buff *skb, u8 multicast)
926 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
928 u8 frag, type, stype;
930 fc = le16_to_cpu(hdr->frame_ctl);
931 type = WLAN_FC_GET_TYPE(fc);
932 stype = WLAN_FC_GET_STYPE(fc);
933 sc = le16_to_cpu(hdr->seq_ctl);
934 frag = WLAN_GET_SEQ_FRAG(sc);
936 if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
937 !ieee->current_network.qos_data.active ||
938 !IsDataFrame(skb->data) ||
939 IsLegacyDataFrame(skb->data)) {
940 if (!((type == RTLLIB_FTYPE_MGMT) &&
941 (stype == RTLLIB_STYPE_BEACON))) {
942 if (is_duplicate_packet(ieee, hdr))
946 struct rx_ts_record *pRxTS = NULL;
948 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
949 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
950 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
951 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
953 pRxTS->RxLastFragNum = frag;
954 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
956 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n",
965 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
966 struct rtllib_hdr_4addr *hdr, u8 *dst,
969 u16 fc = le16_to_cpu(hdr->frame_ctl);
971 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
972 case RTLLIB_FCTL_FROMDS:
973 ether_addr_copy(dst, hdr->addr1);
974 ether_addr_copy(src, hdr->addr3);
975 ether_addr_copy(bssid, hdr->addr2);
977 case RTLLIB_FCTL_TODS:
978 ether_addr_copy(dst, hdr->addr3);
979 ether_addr_copy(src, hdr->addr2);
980 ether_addr_copy(bssid, hdr->addr1);
982 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
983 ether_addr_copy(dst, hdr->addr3);
984 ether_addr_copy(src, hdr->addr4);
985 ether_addr_copy(bssid, ieee->current_network.bssid);
988 ether_addr_copy(dst, hdr->addr1);
989 ether_addr_copy(src, hdr->addr2);
990 ether_addr_copy(bssid, hdr->addr3);
995 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
996 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
1000 type = WLAN_FC_GET_TYPE(fc);
1001 stype = WLAN_FC_GET_STYPE(fc);
1003 /* Filter frames from different BSS */
1004 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
1005 !ether_addr_equal(ieee->current_network.bssid, bssid) &&
1006 !is_zero_ether_addr(ieee->current_network.bssid)) {
1010 /* Filter packets sent by an STA that will be forwarded by AP */
1011 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
1012 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
1013 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
1014 !ether_addr_equal(dst, ieee->current_network.bssid) &&
1015 ether_addr_equal(bssid, ieee->current_network.bssid)) {
1020 /* Nullfunc frames may have PS-bit set, so they must be passed to
1021 * hostap_handle_sta_rx() before being dropped here.
1023 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
1024 if (stype != RTLLIB_STYPE_DATA &&
1025 stype != RTLLIB_STYPE_DATA_CFACK &&
1026 stype != RTLLIB_STYPE_DATA_CFPOLL &&
1027 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
1028 stype != RTLLIB_STYPE_QOS_DATA) {
1029 if (stype != RTLLIB_STYPE_NULLFUNC)
1030 netdev_dbg(ieee->dev,
1031 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
1037 if (ieee->iw_mode != IW_MODE_MESH) {
1038 /* packets from our adapter are dropped (echo) */
1039 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1042 /* {broad,multi}cast packets to our BSS go through */
1043 if (is_multicast_ether_addr(dst)) {
1044 if (memcmp(bssid, ieee->current_network.bssid,
1052 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1053 struct lib80211_crypt_data **crypt, size_t hdrlen)
1055 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1056 u16 fc = le16_to_cpu(hdr->frame_ctl);
1059 if (ieee->host_decrypt) {
1060 if (skb->len >= hdrlen + 3)
1061 idx = skb->data[hdrlen + 3] >> 6;
1063 *crypt = ieee->crypt_info.crypt[idx];
1064 /* allow NULL decrypt to indicate an station specific override
1065 * for default encryption
1067 if (*crypt && ((*crypt)->ops == NULL ||
1068 (*crypt)->ops->decrypt_mpdu == NULL))
1071 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1072 /* This seems to be triggered by some (multicast?)
1073 * frames from other than current BSS, so just drop the
1074 * frames silently instead of filling system log with
1077 netdev_dbg(ieee->dev,
1078 "Decryption failed (not set) (SA= %pM)\n",
1080 ieee->ieee_stats.rx_discards_undecryptable++;
1088 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1089 struct rtllib_rx_stats *rx_stats,
1090 struct lib80211_crypt_data *crypt, size_t hdrlen)
1092 struct rtllib_hdr_4addr *hdr;
1097 hdr = (struct rtllib_hdr_4addr *)skb->data;
1098 fc = le16_to_cpu(hdr->frame_ctl);
1099 sc = le16_to_cpu(hdr->seq_ctl);
1100 frag = WLAN_GET_SEQ_FRAG(sc);
1102 if ((!rx_stats->Decrypted))
1103 ieee->need_sw_enc = 1;
1105 ieee->need_sw_enc = 0;
1107 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1108 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1109 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1113 hdr = (struct rtllib_hdr_4addr *) skb->data;
1114 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1116 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1118 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag);
1121 netdev_dbg(ieee->dev,
1122 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1123 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1124 WLAN_GET_SEQ_SEQ(sc), frag);
1131 if (frag_skb->tail + flen > frag_skb->end) {
1132 netdev_warn(ieee->dev,
1133 "%s: host decrypted and reassembled frame did not fit skb\n",
1135 rtllib_frag_cache_invalidate(ieee, hdr);
1140 /* copy first fragment (including full headers) into
1141 * beginning of the fragment cache skb
1143 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1145 /* append frame payload to the end of the fragment
1148 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1151 dev_kfree_skb_any(skb);
1154 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1155 /* more fragments expected - leave the skb in fragment
1156 * cache for now; it will be delivered to upper layers
1157 * after all fragments have been received
1162 /* this was the last fragment and the frame will be
1163 * delivered, so remove skb from fragment cache
1166 hdr = (struct rtllib_hdr_4addr *) skb->data;
1167 rtllib_frag_cache_invalidate(ieee, hdr);
1170 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1171 * encrypted/authenticated
1173 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1174 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1175 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1179 hdr = (struct rtllib_hdr_4addr *) skb->data;
1180 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1181 if (/*ieee->ieee802_1x &&*/
1182 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1184 /* pass unencrypted EAPOL frames even if encryption is
1187 struct eapol *eap = (struct eapol *)(skb->data +
1189 netdev_dbg(ieee->dev,
1190 "RX: IEEE 802.1X EAPOL frame: %s\n",
1191 eap_get_type(eap->type));
1193 netdev_dbg(ieee->dev,
1194 "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1200 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1201 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1202 struct eapol *eap = (struct eapol *)(skb->data +
1204 netdev_dbg(ieee->dev,
1205 "RX: IEEE 802.1X EAPOL frame: %s\n",
1206 eap_get_type(eap->type));
1209 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1210 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1211 netdev_dbg(ieee->dev,
1212 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1217 if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1218 netdev_warn(ieee->dev, "RX: IEEE802.1X EAPOL frame!\n");
1223 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast,
1228 if (ieee->state == RTLLIB_LINKED) {
1229 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1230 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1231 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1232 if (ieee->LeisurePSLeave)
1233 ieee->LeisurePSLeave(ieee->dev);
1237 ieee->last_rx_ps_time = jiffies;
1240 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1241 struct rtllib_rx_stats *rx_stats,
1242 struct rtllib_rxb *rxb,
1246 struct net_device *dev = ieee->dev;
1251 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1255 for (i = 0; i < rxb->nr_subframes; i++) {
1256 struct sk_buff *sub_skb = rxb->subframes[i];
1259 /* convert hdr + possible LLC headers into Ethernet header */
1260 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1261 if (sub_skb->len >= 8 &&
1262 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1263 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1264 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1265 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1268 skb_pull(sub_skb, SNAP_SIZE);
1269 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1271 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1275 /* Leave Ethernet header part of hdr and full payload */
1277 memcpy(skb_push(sub_skb, 2), &len, 2);
1278 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1280 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1284 ieee->stats.rx_packets++;
1285 ieee->stats.rx_bytes += sub_skb->len;
1287 if (is_multicast_ether_addr(dst))
1288 ieee->stats.multicast++;
1290 /* Indicate the packets to upper layer */
1291 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1292 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1294 sub_skb->dev->stats.rx_packets++;
1295 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1296 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1303 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1304 struct rtllib_rx_stats *rx_stats)
1306 struct net_device *dev = ieee->dev;
1307 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1308 struct lib80211_crypt_data *crypt = NULL;
1309 struct rtllib_rxb *rxb = NULL;
1310 struct rx_ts_record *pTS = NULL;
1311 u16 fc, sc, SeqNum = 0;
1312 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1316 u8 bssid[ETH_ALEN] = {0};
1319 bool bToOtherSTA = false;
1322 hdr = (struct rtllib_hdr_4addr *)skb->data;
1323 fc = le16_to_cpu(hdr->frame_ctl);
1324 type = WLAN_FC_GET_TYPE(fc);
1325 stype = WLAN_FC_GET_STYPE(fc);
1326 sc = le16_to_cpu(hdr->seq_ctl);
1328 /*Filter pkt not to me*/
1329 multicast = is_multicast_ether_addr(hdr->addr1);
1330 unicast = !multicast;
1331 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1332 if (ieee->bNetPromiscuousMode)
1338 /*Filter pkt has too small length */
1339 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1340 if (skb->len < hdrlen) {
1342 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1347 /* Filter Duplicate pkt */
1348 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1352 /* Filter CTRL Frame */
1353 if (type == RTLLIB_FTYPE_CTL)
1356 /* Filter MGNT Frame */
1357 if (type == RTLLIB_FTYPE_MGMT) {
1360 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1366 /* Filter WAPI DATA Frame */
1368 /* Update statstics for AP roaming */
1370 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1371 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1373 dev->last_rx = jiffies;
1375 /* Data frame - extract src/dst addresses */
1376 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1378 /* Filter Data frames */
1379 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1383 if (skb->len == hdrlen)
1386 /* Send pspoll based on moredata */
1387 if ((ieee->iw_mode == IW_MODE_INFRA) &&
1388 (ieee->sta_sleep == LPS_IS_SLEEP) &&
1389 (ieee->polling) && (!bToOtherSTA)) {
1390 if (WLAN_FC_MORE_DATA(fc)) {
1391 /* more data bit is set, let's request a new frame
1394 rtllib_sta_ps_send_pspoll_frame(ieee);
1396 ieee->polling = false;
1400 /* Get crypt if encrypted */
1401 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1405 /* Decrypt data frame (including reassemble) */
1406 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1412 /* Get TS for Rx Reorder */
1413 hdr = (struct rtllib_hdr_4addr *) skb->data;
1414 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1415 && !is_multicast_ether_addr(hdr->addr1)
1416 && (!bToOtherSTA)) {
1417 TID = Frame_QoSTID(skb->data);
1418 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1419 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID,
1421 if (TID != 0 && TID != 3)
1422 ieee->bis_any_nonbepkts = true;
1425 /* Parse rx data frame (For AMSDU) */
1426 /* skb: hdr + (possible reassembled) full plaintext payload */
1427 payload = skb->data + hdrlen;
1428 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1432 /* to parse amsdu packets */
1433 /* qos data packets & reserved bit is 1 */
1434 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1435 /* only to free rxb, and not submit the packets
1438 for (i = 0; i < rxb->nr_subframes; i++)
1439 dev_kfree_skb(rxb->subframes[i]);
1445 /* Update WAPI PN */
1447 /* Check if leave LPS */
1449 if (ieee->bIsAggregateFrame)
1450 nr_subframes = rxb->nr_subframes;
1454 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1455 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1458 /* Indicate packets to upper layer or Rx Reorder */
1459 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL ||
1461 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1463 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1471 ieee->stats.rx_dropped++;
1473 /* Returning 0 indicates to caller that we have not handled the SKB--
1474 * so it is still allocated and can be used again by underlying
1475 * hardware as a DMA target
1480 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1481 struct rtllib_rx_stats *rx_stats)
1486 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1487 struct rtllib_rx_stats *rx_stats)
1489 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1490 u16 fc = le16_to_cpu(hdr->frame_ctl);
1491 size_t hdrlen = rtllib_get_hdrlen(fc);
1493 if (skb->len < hdrlen) {
1494 netdev_info(ieee->dev,
1495 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1500 if (HTCCheck(ieee, skb->data)) {
1501 if (net_ratelimit())
1502 netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1507 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1508 ieee->stats.rx_packets++;
1509 ieee->stats.rx_bytes += skb->len;
1514 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1515 struct rtllib_rx_stats *rx_stats)
1520 /* All received frames are sent to this function. @skb contains the frame in
1521 * IEEE 802.11 format, i.e., in the format it was sent over air.
1522 * This function is called only as a tasklet (software IRQ).
1524 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1525 struct rtllib_rx_stats *rx_stats)
1529 if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1530 pr_info("%s: Input parameters NULL!\n", __func__);
1533 if (skb->len < 10) {
1534 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1538 switch (ieee->iw_mode) {
1541 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1543 case IW_MODE_MASTER:
1544 case IW_MODE_REPEAT:
1545 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1547 case IW_MODE_MONITOR:
1548 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1551 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1554 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1562 ieee->stats.rx_dropped++;
1565 EXPORT_SYMBOL(rtllib_rx);
1567 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1569 /* Make ther structure we read from the beacon packet has the right values */
1570 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1571 *info_element, int sub_type)
1574 if (info_element->qui_subtype != sub_type)
1576 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1578 if (info_element->qui_type != QOS_OUI_TYPE)
1580 if (info_element->version != QOS_VERSION_1)
1587 /* Parse a QoS parameter element */
1588 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1590 struct rtllib_info_element
1594 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1596 if ((info_element == NULL) || (element_param == NULL))
1599 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1600 memcpy(element_param->info_element.qui, info_element->data,
1602 element_param->info_element.elementID = info_element->id;
1603 element_param->info_element.length = info_element->len;
1607 ret = rtllib_verify_qos_info(&element_param->info_element,
1608 QOS_OUI_PARAM_SUB_TYPE);
1612 /* Parse a QoS information element */
1613 static int rtllib_read_qos_info_element(struct rtllib_qos_information_element
1615 struct rtllib_info_element
1619 u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1621 if (element_info == NULL)
1623 if (info_element == NULL)
1626 if ((info_element->id == QOS_ELEMENT_ID) &&
1627 (info_element->len == size)) {
1628 memcpy(element_info->qui, info_element->data,
1630 element_info->elementID = info_element->id;
1631 element_info->length = info_element->len;
1636 ret = rtllib_verify_qos_info(element_info,
1637 QOS_OUI_INFO_SUB_TYPE);
1642 /* Write QoS parameters from the ac parameters. */
1643 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1644 struct rtllib_qos_data *qos_data)
1646 struct rtllib_qos_ac_parameter *ac_params;
1647 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1652 qos_data->wmm_acm = 0;
1653 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1654 ac_params = &(param_elm->ac_params_record[i]);
1656 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1657 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1659 if (aci >= QOS_QUEUE_NUM)
1663 /* BIT(0) | BIT(3) */
1665 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1668 /* BIT(4) | BIT(5) */
1670 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1673 /* BIT(6) | BIT(7) */
1675 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1679 /* BIT(1) | BIT(2) */
1681 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1685 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1687 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1688 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1690 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max &
1693 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max &
1696 qos_param->flag[aci] =
1697 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1698 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1703 /* we have a generic data element which it may contain QoS information or
1704 * parameters element. check the information element length to decide
1705 * which type to read
1707 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee,
1708 struct rtllib_info_element
1710 struct rtllib_network *network)
1713 struct rtllib_qos_information_element qos_info_element;
1715 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1718 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1719 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1721 struct rtllib_qos_parameter_info param_element;
1723 rc = rtllib_read_qos_param_element(¶m_element,
1726 rtllib_qos_convert_ac_to_parameters(¶m_element,
1727 &(network->qos_data));
1728 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1729 network->qos_data.param_count =
1730 param_element.info_element.ac_info & 0x0F;
1735 netdev_dbg(ieee->dev, "QoS is supported\n");
1736 network->qos_data.supported = 1;
1741 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1743 static const char *get_info_element_string(u16 id)
1748 MFIE_STRING(FH_SET);
1749 MFIE_STRING(DS_SET);
1750 MFIE_STRING(CF_SET);
1752 MFIE_STRING(IBSS_SET);
1753 MFIE_STRING(COUNTRY);
1754 MFIE_STRING(HOP_PARAMS);
1755 MFIE_STRING(HOP_TABLE);
1756 MFIE_STRING(REQUEST);
1757 MFIE_STRING(CHALLENGE);
1758 MFIE_STRING(POWER_CONSTRAINT);
1759 MFIE_STRING(POWER_CAPABILITY);
1760 MFIE_STRING(TPC_REQUEST);
1761 MFIE_STRING(TPC_REPORT);
1762 MFIE_STRING(SUPP_CHANNELS);
1764 MFIE_STRING(MEASURE_REQUEST);
1765 MFIE_STRING(MEASURE_REPORT);
1767 MFIE_STRING(IBSS_DFS);
1769 MFIE_STRING(RATES_EX);
1770 MFIE_STRING(GENERIC);
1771 MFIE_STRING(QOS_PARAMETER);
1777 static inline void rtllib_extract_country_ie(
1778 struct rtllib_device *ieee,
1779 struct rtllib_info_element *info_element,
1780 struct rtllib_network *network,
1783 if (IS_DOT11D_ENABLE(ieee)) {
1784 if (info_element->len != 0) {
1785 memcpy(network->CountryIeBuf, info_element->data,
1787 network->CountryIeLen = info_element->len;
1789 if (!IS_COUNTRY_IE_VALID(ieee)) {
1790 if (rtllib_act_scanning(ieee, false) &&
1791 ieee->FirstIe_InScan)
1792 netdev_info(ieee->dev,
1793 "Received beacon ContryIE, SSID: <%s>\n",
1795 Dot11d_UpdateCountryIe(ieee, addr2,
1797 info_element->data);
1801 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1802 UPDATE_CIE_WATCHDOG(ieee);
1807 static void rtllib_parse_mife_generic(struct rtllib_device *ieee,
1808 struct rtllib_info_element *info_element,
1809 struct rtllib_network *network,
1811 u16 *tmp_htinfo_len)
1813 u16 ht_realtek_agg_len = 0;
1814 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1816 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network))
1818 if (info_element->len >= 4 &&
1819 info_element->data[0] == 0x00 &&
1820 info_element->data[1] == 0x50 &&
1821 info_element->data[2] == 0xf2 &&
1822 info_element->data[3] == 0x01) {
1823 network->wpa_ie_len = min(info_element->len + 2,
1825 memcpy(network->wpa_ie, info_element, network->wpa_ie_len);
1828 if (info_element->len == 7 &&
1829 info_element->data[0] == 0x00 &&
1830 info_element->data[1] == 0xe0 &&
1831 info_element->data[2] == 0x4c &&
1832 info_element->data[3] == 0x01 &&
1833 info_element->data[4] == 0x02)
1834 network->Turbo_Enable = 1;
1836 if (*tmp_htcap_len == 0) {
1837 if (info_element->len >= 4 &&
1838 info_element->data[0] == 0x00 &&
1839 info_element->data[1] == 0x90 &&
1840 info_element->data[2] == 0x4c &&
1841 info_element->data[3] == 0x033) {
1843 *tmp_htcap_len = min_t(u8, info_element->len,
1845 if (*tmp_htcap_len != 0) {
1846 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1847 network->bssht.bdHTCapLen = min_t(u16, *tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf));
1848 memcpy(network->bssht.bdHTCapBuf,
1850 network->bssht.bdHTCapLen);
1853 if (*tmp_htcap_len != 0) {
1854 network->bssht.bdSupportHT = true;
1855 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1857 network->bssht.bdSupportHT = false;
1858 network->bssht.bdHT1R = false;
1863 if (*tmp_htinfo_len == 0) {
1864 if (info_element->len >= 4 &&
1865 info_element->data[0] == 0x00 &&
1866 info_element->data[1] == 0x90 &&
1867 info_element->data[2] == 0x4c &&
1868 info_element->data[3] == 0x034) {
1869 *tmp_htinfo_len = min_t(u8, info_element->len,
1871 if (*tmp_htinfo_len != 0) {
1872 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1873 network->bssht.bdHTInfoLen = min_t(u16, *tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf));
1874 memcpy(network->bssht.bdHTInfoBuf,
1876 network->bssht.bdHTInfoLen);
1882 if (ieee->aggregation) {
1883 if (network->bssht.bdSupportHT) {
1884 if (info_element->len >= 4 &&
1885 info_element->data[0] == 0x00 &&
1886 info_element->data[1] == 0xe0 &&
1887 info_element->data[2] == 0x4c &&
1888 info_element->data[3] == 0x02) {
1889 ht_realtek_agg_len = min_t(u8,
1892 memcpy(ht_realtek_agg_buf,
1896 if (ht_realtek_agg_len >= 5) {
1897 network->realtek_cap_exit = true;
1898 network->bssht.bdRT2RTAggregation = true;
1900 if ((ht_realtek_agg_buf[4] == 1) &&
1901 (ht_realtek_agg_buf[5] & 0x02))
1902 network->bssht.bdRT2RTLongSlotTime = true;
1904 if ((ht_realtek_agg_buf[4] == 1) &&
1905 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1906 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1909 if (ht_realtek_agg_len >= 5) {
1910 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1911 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1915 if ((info_element->len >= 3 &&
1916 info_element->data[0] == 0x00 &&
1917 info_element->data[1] == 0x05 &&
1918 info_element->data[2] == 0xb5) ||
1919 (info_element->len >= 3 &&
1920 info_element->data[0] == 0x00 &&
1921 info_element->data[1] == 0x0a &&
1922 info_element->data[2] == 0xf7) ||
1923 (info_element->len >= 3 &&
1924 info_element->data[0] == 0x00 &&
1925 info_element->data[1] == 0x10 &&
1926 info_element->data[2] == 0x18)) {
1927 network->broadcom_cap_exist = true;
1929 if (info_element->len >= 3 &&
1930 info_element->data[0] == 0x00 &&
1931 info_element->data[1] == 0x0c &&
1932 info_element->data[2] == 0x43)
1933 network->ralink_cap_exist = true;
1934 if ((info_element->len >= 3 &&
1935 info_element->data[0] == 0x00 &&
1936 info_element->data[1] == 0x03 &&
1937 info_element->data[2] == 0x7f) ||
1938 (info_element->len >= 3 &&
1939 info_element->data[0] == 0x00 &&
1940 info_element->data[1] == 0x13 &&
1941 info_element->data[2] == 0x74))
1942 network->atheros_cap_exist = true;
1944 if ((info_element->len >= 3 &&
1945 info_element->data[0] == 0x00 &&
1946 info_element->data[1] == 0x50 &&
1947 info_element->data[2] == 0x43))
1948 network->marvell_cap_exist = true;
1949 if (info_element->len >= 3 &&
1950 info_element->data[0] == 0x00 &&
1951 info_element->data[1] == 0x40 &&
1952 info_element->data[2] == 0x96)
1953 network->cisco_cap_exist = true;
1956 if (info_element->len >= 3 &&
1957 info_element->data[0] == 0x00 &&
1958 info_element->data[1] == 0x0a &&
1959 info_element->data[2] == 0xf5)
1960 network->airgo_cap_exist = true;
1962 if (info_element->len > 4 &&
1963 info_element->data[0] == 0x00 &&
1964 info_element->data[1] == 0x40 &&
1965 info_element->data[2] == 0x96 &&
1966 info_element->data[3] == 0x01) {
1967 if (info_element->len == 6) {
1968 memcpy(network->CcxRmState, &info_element[4], 2);
1969 if (network->CcxRmState[0] != 0)
1970 network->bCcxRmEnable = true;
1972 network->bCcxRmEnable = false;
1973 network->MBssidMask = network->CcxRmState[1] & 0x07;
1974 if (network->MBssidMask != 0) {
1975 network->bMBssidValid = true;
1976 network->MBssidMask = 0xff <<
1977 (network->MBssidMask);
1978 ether_addr_copy(network->MBssid,
1980 network->MBssid[5] &= network->MBssidMask;
1982 network->bMBssidValid = false;
1985 network->bCcxRmEnable = false;
1988 if (info_element->len > 4 &&
1989 info_element->data[0] == 0x00 &&
1990 info_element->data[1] == 0x40 &&
1991 info_element->data[2] == 0x96 &&
1992 info_element->data[3] == 0x03) {
1993 if (info_element->len == 5) {
1994 network->bWithCcxVerNum = true;
1995 network->BssCcxVerNumber = info_element->data[4];
1997 network->bWithCcxVerNum = false;
1998 network->BssCcxVerNumber = 0;
2001 if (info_element->len > 4 &&
2002 info_element->data[0] == 0x00 &&
2003 info_element->data[1] == 0x50 &&
2004 info_element->data[2] == 0xf2 &&
2005 info_element->data[3] == 0x04) {
2006 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n",
2008 network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN);
2009 memcpy(network->wzc_ie, info_element, network->wzc_ie_len);
2013 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element,
2014 struct rtllib_network *network,
2017 struct bss_ht *ht = &network->bssht;
2019 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2020 if (*tmp_htcap_len != 0) {
2021 ht->bdHTSpecVer = HT_SPEC_VER_EWC;
2022 ht->bdHTCapLen = min_t(u16, *tmp_htcap_len,
2023 sizeof(ht->bdHTCapBuf));
2024 memcpy(ht->bdHTCapBuf, info_element->data, ht->bdHTCapLen);
2026 ht->bdSupportHT = true;
2027 ht->bdHT1R = ((((struct ht_capab_ele *)
2028 ht->bdHTCapBuf))->MCS[1]) == 0;
2030 ht->bdBandWidth = (enum ht_channel_width)
2031 (((struct ht_capab_ele *)
2032 (ht->bdHTCapBuf))->ChlWidth);
2034 ht->bdSupportHT = false;
2036 ht->bdBandWidth = HT_CHANNEL_WIDTH_20;
2040 int rtllib_parse_info_param(struct rtllib_device *ieee,
2041 struct rtllib_info_element *info_element,
2043 struct rtllib_network *network,
2044 struct rtllib_rx_stats *stats)
2048 u16 tmp_htcap_len = 0;
2049 u16 tmp_htinfo_len = 0;
2053 while (length >= sizeof(*info_element)) {
2054 if (sizeof(*info_element) + info_element->len > length) {
2055 netdev_dbg(ieee->dev,
2056 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
2057 info_element->len + sizeof(*info_element),
2058 length, info_element->id);
2059 /* We stop processing but don't return an error here
2060 * because some misbehaviour APs break this rule. ie.
2066 switch (info_element->id) {
2067 case MFIE_TYPE_SSID:
2068 if (rtllib_is_empty_essid(info_element->data,
2069 info_element->len)) {
2070 network->flags |= NETWORK_EMPTY_ESSID;
2074 network->ssid_len = min(info_element->len,
2075 (u8) IW_ESSID_MAX_SIZE);
2076 memcpy(network->ssid, info_element->data,
2078 if (network->ssid_len < IW_ESSID_MAX_SIZE)
2079 memset(network->ssid + network->ssid_len, 0,
2080 IW_ESSID_MAX_SIZE - network->ssid_len);
2082 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n",
2083 network->ssid, network->ssid_len);
2086 case MFIE_TYPE_RATES:
2088 network->rates_len = min(info_element->len,
2090 for (i = 0; i < network->rates_len; i++) {
2091 network->rates[i] = info_element->data[i];
2092 p += snprintf(p, sizeof(rates_str) -
2093 (p - rates_str), "%02X ",
2095 if (rtllib_is_ofdm_rate
2096 (info_element->data[i])) {
2097 network->flags |= NETWORK_HAS_OFDM;
2098 if (info_element->data[i] &
2099 RTLLIB_BASIC_RATE_MASK)
2104 if (rtllib_is_cck_rate
2105 (info_element->data[i])) {
2106 network->flags |= NETWORK_HAS_CCK;
2110 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n",
2111 rates_str, network->rates_len);
2114 case MFIE_TYPE_RATES_EX:
2116 network->rates_ex_len = min(info_element->len,
2117 MAX_RATES_EX_LENGTH);
2118 for (i = 0; i < network->rates_ex_len; i++) {
2119 network->rates_ex[i] = info_element->data[i];
2120 p += snprintf(p, sizeof(rates_str) -
2121 (p - rates_str), "%02X ",
2122 network->rates_ex[i]);
2123 if (rtllib_is_ofdm_rate
2124 (info_element->data[i])) {
2125 network->flags |= NETWORK_HAS_OFDM;
2126 if (info_element->data[i] &
2127 RTLLIB_BASIC_RATE_MASK)
2133 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n",
2134 rates_str, network->rates_ex_len);
2137 case MFIE_TYPE_DS_SET:
2138 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n",
2139 info_element->data[0]);
2140 network->channel = info_element->data[0];
2143 case MFIE_TYPE_FH_SET:
2144 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n");
2147 case MFIE_TYPE_CF_SET:
2148 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n");
2152 if (info_element->len < 4)
2155 network->tim.tim_count = info_element->data[0];
2156 network->tim.tim_period = info_element->data[1];
2158 network->dtim_period = info_element->data[1];
2159 if (ieee->state != RTLLIB_LINKED)
2161 network->last_dtim_sta_time = jiffies;
2163 network->dtim_data = RTLLIB_DTIM_VALID;
2166 if (info_element->data[2] & 1)
2167 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2169 offset = (info_element->data[2] >> 1)*2;
2172 if (ieee->assoc_id < 8*offset ||
2173 ieee->assoc_id > 8*(offset + info_element->len - 3))
2176 offset = (ieee->assoc_id / 8) - offset;
2177 if (info_element->data[3 + offset] &
2178 (1 << (ieee->assoc_id % 8)))
2179 network->dtim_data |= RTLLIB_DTIM_UCAST;
2181 network->listen_interval = network->dtim_period;
2185 network->erp_value = info_element->data[0];
2186 network->flags |= NETWORK_HAS_ERP_VALUE;
2187 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n",
2188 network->erp_value);
2190 case MFIE_TYPE_IBSS_SET:
2191 network->atim_window = info_element->data[0];
2192 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n",
2193 network->atim_window);
2196 case MFIE_TYPE_CHALLENGE:
2197 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n");
2200 case MFIE_TYPE_GENERIC:
2201 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n",
2204 rtllib_parse_mife_generic(ieee, info_element, network,
2210 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n",
2212 network->rsn_ie_len = min(info_element->len + 2,
2214 memcpy(network->rsn_ie, info_element,
2215 network->rsn_ie_len);
2218 case MFIE_TYPE_HT_CAP:
2219 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n",
2222 rtllib_parse_mfie_ht_cap(info_element, network,
2227 case MFIE_TYPE_HT_INFO:
2228 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n",
2230 tmp_htinfo_len = min_t(u8, info_element->len,
2232 if (tmp_htinfo_len) {
2233 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2234 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2235 sizeof(network->bssht.bdHTInfoBuf) ?
2236 sizeof(network->bssht.bdHTInfoBuf) :
2238 memcpy(network->bssht.bdHTInfoBuf,
2240 network->bssht.bdHTInfoLen);
2244 case MFIE_TYPE_AIRONET:
2245 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n",
2247 if (info_element->len > IE_CISCO_FLAG_POSITION) {
2248 network->bWithAironetIE = true;
2250 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2251 & SUPPORT_CKIP_MIC) ||
2252 (info_element->data[IE_CISCO_FLAG_POSITION]
2254 network->bCkipSupported = true;
2256 network->bCkipSupported = false;
2258 network->bWithAironetIE = false;
2259 network->bCkipSupported = false;
2262 case MFIE_TYPE_QOS_PARAMETER:
2263 netdev_err(ieee->dev,
2264 "QoS Error need to parse QOS_PARAMETER IE\n");
2267 case MFIE_TYPE_COUNTRY:
2268 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n",
2270 rtllib_extract_country_ie(ieee, info_element, network,
2275 netdev_dbg(ieee->dev,
2276 "Unsupported info element: %s (%d)\n",
2277 get_info_element_string(info_element->id),
2282 length -= sizeof(*info_element) + info_element->len;
2284 (struct rtllib_info_element *)&info_element->
2285 data[info_element->len];
2288 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2289 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2290 !network->bssht.bdRT2RTAggregation)
2291 network->unknown_cap_exist = true;
2293 network->unknown_cap_exist = false;
2297 static long rtllib_translate_todbm(u8 signal_strength_index)
2301 signal_power = (long)((signal_strength_index + 1) >> 1);
2304 return signal_power;
2307 static inline int rtllib_network_init(
2308 struct rtllib_device *ieee,
2309 struct rtllib_probe_response *beacon,
2310 struct rtllib_network *network,
2311 struct rtllib_rx_stats *stats)
2313 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2315 /* Pull out fixed field data */
2316 ether_addr_copy(network->bssid, beacon->header.addr3);
2317 network->capability = le16_to_cpu(beacon->capability);
2318 network->last_scanned = jiffies;
2319 network->time_stamp[0] = beacon->time_stamp[0];
2320 network->time_stamp[1] = beacon->time_stamp[1];
2321 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2322 /* Where to pull this? beacon->listen_interval;*/
2323 network->listen_interval = 0x0A;
2324 network->rates_len = network->rates_ex_len = 0;
2325 network->last_associate = 0;
2326 network->ssid_len = 0;
2327 network->hidden_ssid_len = 0;
2328 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2330 network->atim_window = 0;
2331 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2333 network->berp_info_valid = false;
2334 network->broadcom_cap_exist = false;
2335 network->ralink_cap_exist = false;
2336 network->atheros_cap_exist = false;
2337 network->cisco_cap_exist = false;
2338 network->unknown_cap_exist = false;
2339 network->realtek_cap_exit = false;
2340 network->marvell_cap_exist = false;
2341 network->airgo_cap_exist = false;
2342 network->Turbo_Enable = 0;
2343 network->SignalStrength = stats->SignalStrength;
2344 network->RSSI = stats->SignalStrength;
2345 network->CountryIeLen = 0;
2346 memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2347 HTInitializeBssDesc(&network->bssht);
2348 if (stats->freq == RTLLIB_52GHZ_BAND) {
2349 /* for A band (No DS info) */
2350 network->channel = stats->received_channel;
2352 network->flags |= NETWORK_HAS_CCK;
2354 network->wpa_ie_len = 0;
2355 network->rsn_ie_len = 0;
2356 network->wzc_ie_len = 0;
2358 if (rtllib_parse_info_param(ieee,
2359 beacon->info_element,
2360 (stats->len - sizeof(*beacon)),
2366 if (stats->freq == RTLLIB_52GHZ_BAND)
2367 network->mode = IEEE_A;
2369 if (network->flags & NETWORK_HAS_OFDM)
2370 network->mode |= IEEE_G;
2371 if (network->flags & NETWORK_HAS_CCK)
2372 network->mode |= IEEE_B;
2375 if (network->mode == 0) {
2376 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n",
2377 escape_essid(network->ssid, network->ssid_len),
2382 if (network->bssht.bdSupportHT) {
2383 if (network->mode == IEEE_A)
2384 network->mode = IEEE_N_5G;
2385 else if (network->mode & (IEEE_G | IEEE_B))
2386 network->mode = IEEE_N_24G;
2388 if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2389 network->flags |= NETWORK_EMPTY_ESSID;
2390 stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2391 stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2393 memcpy(&network->stats, stats, sizeof(network->stats));
2398 static inline int is_same_network(struct rtllib_network *src,
2399 struct rtllib_network *dst, u8 ssidbroad)
2401 /* A network is only a duplicate if the channel, BSSID, ESSID
2402 * and the capability field (in particular IBSS and BSS) all match.
2403 * We treat all <hidden> with the same BSSID and channel
2406 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2407 (src->channel == dst->channel) &&
2408 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2409 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2411 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2412 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2413 ((src->capability & WLAN_CAPABILITY_ESS) ==
2414 (dst->capability & WLAN_CAPABILITY_ESS)));
2418 static inline void update_network(struct rtllib_device *ieee,
2419 struct rtllib_network *dst,
2420 struct rtllib_network *src)
2425 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2426 dst->capability = src->capability;
2427 memcpy(dst->rates, src->rates, src->rates_len);
2428 dst->rates_len = src->rates_len;
2429 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2430 dst->rates_ex_len = src->rates_ex_len;
2431 if (src->ssid_len > 0) {
2432 if (dst->ssid_len == 0) {
2433 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2434 dst->hidden_ssid_len = src->ssid_len;
2435 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2437 memset(dst->ssid, 0, dst->ssid_len);
2438 dst->ssid_len = src->ssid_len;
2439 memcpy(dst->ssid, src->ssid, src->ssid_len);
2442 dst->mode = src->mode;
2443 dst->flags = src->flags;
2444 dst->time_stamp[0] = src->time_stamp[0];
2445 dst->time_stamp[1] = src->time_stamp[1];
2446 if (src->flags & NETWORK_HAS_ERP_VALUE) {
2447 dst->erp_value = src->erp_value;
2448 dst->berp_info_valid = src->berp_info_valid = true;
2450 dst->beacon_interval = src->beacon_interval;
2451 dst->listen_interval = src->listen_interval;
2452 dst->atim_window = src->atim_window;
2453 dst->dtim_period = src->dtim_period;
2454 dst->dtim_data = src->dtim_data;
2455 dst->last_dtim_sta_time = src->last_dtim_sta_time;
2456 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2458 dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2459 dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2460 dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2461 memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2462 src->bssht.bdHTCapLen);
2463 dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2464 memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2465 src->bssht.bdHTInfoLen);
2466 dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2467 dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2468 dst->broadcom_cap_exist = src->broadcom_cap_exist;
2469 dst->ralink_cap_exist = src->ralink_cap_exist;
2470 dst->atheros_cap_exist = src->atheros_cap_exist;
2471 dst->realtek_cap_exit = src->realtek_cap_exit;
2472 dst->marvell_cap_exist = src->marvell_cap_exist;
2473 dst->cisco_cap_exist = src->cisco_cap_exist;
2474 dst->airgo_cap_exist = src->airgo_cap_exist;
2475 dst->unknown_cap_exist = src->unknown_cap_exist;
2476 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2477 dst->wpa_ie_len = src->wpa_ie_len;
2478 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2479 dst->rsn_ie_len = src->rsn_ie_len;
2480 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2481 dst->wzc_ie_len = src->wzc_ie_len;
2483 dst->last_scanned = jiffies;
2484 /* qos related parameters */
2485 qos_active = dst->qos_data.active;
2486 old_param = dst->qos_data.param_count;
2487 dst->qos_data.supported = src->qos_data.supported;
2488 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2489 memcpy(&dst->qos_data, &src->qos_data,
2490 sizeof(struct rtllib_qos_data));
2491 if (dst->qos_data.supported == 1) {
2493 netdev_dbg(ieee->dev,
2494 "QoS the network %s is QoS supported\n",
2497 netdev_dbg(ieee->dev,
2498 "QoS the network is QoS supported\n");
2500 dst->qos_data.active = qos_active;
2501 dst->qos_data.old_param_count = old_param;
2503 /* dst->last_associate is not overwritten */
2504 dst->wmm_info = src->wmm_info;
2505 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2506 src->wmm_param[1].ac_aci_acm_aifsn ||
2507 src->wmm_param[2].ac_aci_acm_aifsn ||
2508 src->wmm_param[3].ac_aci_acm_aifsn)
2509 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2511 dst->SignalStrength = src->SignalStrength;
2512 dst->RSSI = src->RSSI;
2513 dst->Turbo_Enable = src->Turbo_Enable;
2515 dst->CountryIeLen = src->CountryIeLen;
2516 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2518 dst->bWithAironetIE = src->bWithAironetIE;
2519 dst->bCkipSupported = src->bCkipSupported;
2520 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2521 dst->bCcxRmEnable = src->bCcxRmEnable;
2522 dst->MBssidMask = src->MBssidMask;
2523 dst->bMBssidValid = src->bMBssidValid;
2524 memcpy(dst->MBssid, src->MBssid, 6);
2525 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2526 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2529 static inline int is_beacon(u16 fc)
2531 return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON);
2534 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2536 if (MAX_CHANNEL_NUMBER < channel) {
2537 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2541 if (rtllib->active_channel_map[channel] == 2)
2547 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2549 if (MAX_CHANNEL_NUMBER < channel) {
2550 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2553 if (rtllib->active_channel_map[channel] > 0)
2558 EXPORT_SYMBOL(rtllib_legal_channel);
2560 static inline void rtllib_process_probe_response(
2561 struct rtllib_device *ieee,
2562 struct rtllib_probe_response *beacon,
2563 struct rtllib_rx_stats *stats)
2565 struct rtllib_network *target;
2566 struct rtllib_network *oldest = NULL;
2567 struct rtllib_info_element *info_element = &beacon->info_element[0];
2568 unsigned long flags;
2570 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2572 u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl);
2577 netdev_dbg(ieee->dev,
2578 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2579 escape_essid(info_element->data, info_element->len),
2580 beacon->header.addr3,
2581 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2582 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2583 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2584 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2585 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2586 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2587 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2588 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2589 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2590 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2591 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2592 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2593 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2594 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2595 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2596 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2598 if (rtllib_network_init(ieee, beacon, network, stats)) {
2599 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n",
2600 escape_essid(info_element->data, info_element->len),
2601 beacon->header.addr3,
2602 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2607 if (!rtllib_legal_channel(ieee, network->channel))
2610 if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2611 if (IsPassiveChannel(ieee, network->channel)) {
2612 netdev_info(ieee->dev,
2613 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2619 /* The network parsed correctly -- so now we scan our known networks
2620 * to see if we can find it in our list.
2622 * NOTE: This search is definitely not optimized. Once its doing
2623 * the "right thing" we'll optimize it for efficiency if
2627 /* Search for this entry in the list and update it if it is
2631 spin_lock_irqsave(&ieee->lock, flags);
2632 if (is_same_network(&ieee->current_network, network,
2633 (network->ssid_len ? 1 : 0))) {
2634 update_network(ieee, &ieee->current_network, network);
2635 if ((ieee->current_network.mode == IEEE_N_24G ||
2636 ieee->current_network.mode == IEEE_G)
2637 && ieee->current_network.berp_info_valid) {
2638 if (ieee->current_network.erp_value & ERP_UseProtection)
2639 ieee->current_network.buseprotection = true;
2641 ieee->current_network.buseprotection = false;
2643 if (is_beacon(frame_ctl)) {
2644 if (ieee->state >= RTLLIB_LINKED)
2645 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2648 list_for_each_entry(target, &ieee->network_list, list) {
2649 if (is_same_network(target, network,
2650 (target->ssid_len ? 1 : 0)))
2652 if ((oldest == NULL) ||
2653 (target->last_scanned < oldest->last_scanned))
2657 /* If we didn't find a match, then get a new network slot to initialize
2658 * with this beacon's information
2660 if (&target->list == &ieee->network_list) {
2661 if (list_empty(&ieee->network_free_list)) {
2662 /* If there are no more slots, expire the oldest */
2663 list_del(&oldest->list);
2665 netdev_dbg(ieee->dev,
2666 "Expired '%s' ( %pM) from network list.\n",
2667 escape_essid(target->ssid, target->ssid_len),
2670 /* Otherwise just pull from the free list */
2671 target = list_entry(ieee->network_free_list.next,
2672 struct rtllib_network, list);
2673 list_del(ieee->network_free_list.next);
2676 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n",
2677 escape_essid(network->ssid, network->ssid_len),
2679 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2681 memcpy(target, network, sizeof(*target));
2682 list_add_tail(&target->list, &ieee->network_list);
2683 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2684 rtllib_softmac_new_net(ieee, network);
2686 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n",
2687 escape_essid(target->ssid, target->ssid_len),
2689 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2691 /* we have an entry and we are going to update it. But this
2692 * entry may be already expired. In this case we do the same
2693 * as we found a new net and call the new_net handler
2695 renew = !time_after(target->last_scanned + ieee->scan_age,
2697 if ((!target->ssid_len) &&
2698 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2699 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2700 (strncmp(ieee->current_network.ssid, network->ssid,
2701 network->ssid_len) == 0) &&
2702 (ieee->state == RTLLIB_NOLINK))))
2704 update_network(ieee, target, network);
2705 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2706 rtllib_softmac_new_net(ieee, network);
2709 spin_unlock_irqrestore(&ieee->lock, flags);
2710 if (is_beacon(frame_ctl) &&
2711 is_same_network(&ieee->current_network, network,
2712 (network->ssid_len ? 1 : 0)) &&
2713 (ieee->state == RTLLIB_LINKED)) {
2714 if (ieee->handle_beacon != NULL)
2715 ieee->handle_beacon(ieee->dev, beacon,
2716 &ieee->current_network);
2722 void rtllib_rx_mgt(struct rtllib_device *ieee,
2723 struct sk_buff *skb,
2724 struct rtllib_rx_stats *stats)
2726 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2728 if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2729 RTLLIB_STYPE_PROBE_RESP) &&
2730 (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2731 RTLLIB_STYPE_BEACON))
2732 ieee->last_rx_ps_time = jiffies;
2734 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2736 case RTLLIB_STYPE_BEACON:
2737 netdev_dbg(ieee->dev, "received BEACON (%d)\n",
2738 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2739 rtllib_process_probe_response(
2740 ieee, (struct rtllib_probe_response *)header,
2743 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2744 ieee->iw_mode == IW_MODE_INFRA &&
2745 ieee->state == RTLLIB_LINKED))
2746 tasklet_schedule(&ieee->ps_task);
2750 case RTLLIB_STYPE_PROBE_RESP:
2751 netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n",
2752 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2753 rtllib_process_probe_response(ieee,
2754 (struct rtllib_probe_response *)header, stats);
2756 case RTLLIB_STYPE_PROBE_REQ:
2757 netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n",
2758 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2759 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2760 ((ieee->iw_mode == IW_MODE_ADHOC ||
2761 ieee->iw_mode == IW_MODE_MASTER) &&
2762 ieee->state == RTLLIB_LINKED))
2763 rtllib_rx_probe_rq(ieee, skb);