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 void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb,
48 struct rtllib_rx_stats *stats);
50 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
52 struct rtllib_rx_stats *rx_status,
56 skb_reset_mac_header(skb);
57 skb_pull(skb, hdr_length);
58 skb->pkt_type = PACKET_OTHERHOST;
59 skb->protocol = htons(ETH_P_80211_RAW);
60 memset(skb->cb, 0, sizeof(skb->cb));
64 /* Called only as a tasklet (software IRQ) */
65 static struct rtllib_frag_entry *
66 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
67 unsigned int frag, u8 tid, u8 *src, u8 *dst)
69 struct rtllib_frag_entry *entry;
72 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
73 entry = &ieee->frag_cache[tid][i];
74 if (entry->skb != NULL &&
75 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
77 "expiring fragment cache entry seq=%u last_frag=%u\n",
78 entry->seq, entry->last_frag);
79 dev_kfree_skb_any(entry->skb);
83 if (entry->skb != NULL && entry->seq == seq &&
84 (entry->last_frag + 1 == frag || frag == -1) &&
85 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
86 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
93 /* Called only as a tasklet (software IRQ) */
94 static struct sk_buff *
95 rtllib_frag_cache_get(struct rtllib_device *ieee,
96 struct rtllib_hdr_4addr *hdr)
98 struct sk_buff *skb = NULL;
99 u16 fc = le16_to_cpu(hdr->frame_ctl);
100 u16 sc = le16_to_cpu(hdr->seq_ctl);
101 unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
102 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
103 struct rtllib_frag_entry *entry;
104 struct rtllib_hdr_3addrqos *hdr_3addrqos;
105 struct rtllib_hdr_4addrqos *hdr_4addrqos;
108 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
109 RTLLIB_QOS_HAS_SEQ(fc)) {
110 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
111 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
114 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
115 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
116 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
124 /* Reserve enough space to fit maximum frame length */
125 skb = dev_alloc_skb(ieee->dev->mtu +
126 sizeof(struct rtllib_hdr_4addr) +
132 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0));
136 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
137 ieee->frag_next_idx[tid]++;
138 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
139 ieee->frag_next_idx[tid] = 0;
141 if (entry->skb != NULL)
142 dev_kfree_skb_any(entry->skb);
144 entry->first_frag_time = jiffies;
146 entry->last_frag = frag;
148 ether_addr_copy(entry->src_addr, hdr->addr2);
149 ether_addr_copy(entry->dst_addr, hdr->addr1);
151 /* received a fragment of a frame for which the head fragment
152 * should have already been received
154 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
157 entry->last_frag = frag;
166 /* Called only as a tasklet (software IRQ) */
167 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
168 struct rtllib_hdr_4addr *hdr)
170 u16 fc = le16_to_cpu(hdr->frame_ctl);
171 u16 sc = le16_to_cpu(hdr->seq_ctl);
172 unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
173 struct rtllib_frag_entry *entry;
174 struct rtllib_hdr_3addrqos *hdr_3addrqos;
175 struct rtllib_hdr_4addrqos *hdr_4addrqos;
178 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
179 RTLLIB_QOS_HAS_SEQ(fc)) {
180 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
181 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
184 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
185 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
186 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
193 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
197 netdev_dbg(ieee->dev,
198 "Couldn't invalidate fragment cache entry (seq=%u)\n",
207 /* rtllib_rx_frame_mgtmt
209 * Responsible for handling management control frames
211 * Called by rtllib_rx
214 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
215 struct rtllib_rx_stats *rx_stats, u16 type,
218 /* On the struct stats definition there is written that
219 * this is not mandatory.... but seems that the probe
220 * response parser uses it
222 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
224 rx_stats->len = skb->len;
225 rtllib_rx_mgt(ieee, skb, rx_stats);
226 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
227 dev_kfree_skb_any(skb);
230 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
232 dev_kfree_skb_any(skb);
237 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation
238 * Ethernet-II snap header (RFC1042 for most EtherTypes)
240 static unsigned char rfc1042_header[] = {
241 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
243 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
244 static unsigned char bridge_tunnel_header[] = {
245 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
247 /* No encapsulation header if EtherType < 0x600 (=length) */
249 /* Called by rtllib_rx_frame_decrypt */
250 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
251 struct sk_buff *skb, size_t hdrlen)
253 struct net_device *dev = ieee->dev;
255 struct rtllib_hdr_4addr *hdr;
261 hdr = (struct rtllib_hdr_4addr *) skb->data;
262 fc = le16_to_cpu(hdr->frame_ctl);
264 /* check that the frame is unicast frame to us */
265 if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
267 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
268 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
269 /* ToDS frame with own addr BSSID and DA */
270 } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
271 RTLLIB_FCTL_FROMDS &&
272 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
273 /* FromDS frame with own addr as DA */
277 if (skb->len < 24 + 8)
280 /* check for port access entity Ethernet type */
281 pos = skb->data + hdrlen;
282 ethertype = (pos[6] << 8) | pos[7];
283 if (ethertype == ETH_P_PAE)
289 /* Called only as a tasklet (software IRQ), by rtllib_rx */
291 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
292 struct lib80211_crypt_data *crypt)
294 struct rtllib_hdr_4addr *hdr;
297 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
300 if (ieee->hwsec_active) {
301 struct cb_desc *tcb_desc = (struct cb_desc *)
302 (skb->cb + MAX_DEV_ADDR_SIZE);
304 tcb_desc->bHwSec = 1;
306 if (ieee->need_sw_enc)
307 tcb_desc->bHwSec = 0;
310 hdr = (struct rtllib_hdr_4addr *) skb->data;
311 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
313 atomic_inc(&crypt->refcnt);
314 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
315 atomic_dec(&crypt->refcnt);
317 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n",
320 netdev_dbg(ieee->dev,
321 "Decryption failed ICV mismatch (key %d)\n",
322 skb->data[hdrlen + 3] >> 6);
330 /* Called only as a tasklet (software IRQ), by rtllib_rx */
332 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
333 int keyidx, struct lib80211_crypt_data *crypt)
335 struct rtllib_hdr_4addr *hdr;
338 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
340 if (ieee->hwsec_active) {
341 struct cb_desc *tcb_desc = (struct cb_desc *)
342 (skb->cb + MAX_DEV_ADDR_SIZE);
344 tcb_desc->bHwSec = 1;
346 if (ieee->need_sw_enc)
347 tcb_desc->bHwSec = 0;
350 hdr = (struct rtllib_hdr_4addr *) skb->data;
351 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
353 atomic_inc(&crypt->refcnt);
354 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
355 atomic_dec(&crypt->refcnt);
357 netdev_dbg(ieee->dev,
358 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
367 /* this function is stolen from ipw2200 driver*/
368 #define IEEE_PACKET_RETRY_TIME (5*HZ)
369 static int is_duplicate_packet(struct rtllib_device *ieee,
370 struct rtllib_hdr_4addr *header)
372 u16 fc = le16_to_cpu(header->frame_ctl);
373 u16 sc = le16_to_cpu(header->seq_ctl);
374 u16 seq = WLAN_GET_SEQ_SEQ(sc);
375 u16 frag = WLAN_GET_SEQ_FRAG(sc);
376 u16 *last_seq, *last_frag;
377 unsigned long *last_time;
378 struct rtllib_hdr_3addrqos *hdr_3addrqos;
379 struct rtllib_hdr_4addrqos *hdr_4addrqos;
382 if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
383 RTLLIB_QOS_HAS_SEQ(fc)) {
384 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
385 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
388 } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
389 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
390 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
397 switch (ieee->iw_mode) {
401 struct ieee_ibss_seq *entry = NULL;
402 u8 *mac = header->addr2;
403 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
405 list_for_each(p, &ieee->ibss_mac_hash[index]) {
406 entry = list_entry(p, struct ieee_ibss_seq, list);
407 if (!memcmp(entry->mac, mac, ETH_ALEN))
410 if (p == &ieee->ibss_mac_hash[index]) {
411 entry = kmalloc(sizeof(struct ieee_ibss_seq),
416 ether_addr_copy(entry->mac, mac);
417 entry->seq_num[tid] = seq;
418 entry->frag_num[tid] = frag;
419 entry->packet_time[tid] = jiffies;
420 list_add(&entry->list, &ieee->ibss_mac_hash[index]);
423 last_seq = &entry->seq_num[tid];
424 last_frag = &entry->frag_num[tid];
425 last_time = &entry->packet_time[tid];
430 last_seq = &ieee->last_rxseq_num[tid];
431 last_frag = &ieee->last_rxfrag_num[tid];
432 last_time = &ieee->last_packet_time[tid];
438 if ((*last_seq == seq) &&
439 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
440 if (*last_frag == frag)
442 if (*last_frag + 1 != frag)
443 /* out-of-order fragment */
449 *last_time = jiffies;
457 static bool AddReorderEntry(struct rx_ts_record *pTS,
458 struct rx_reorder_entry *pReorderEntry)
460 struct list_head *pList = &pTS->RxPendingPktList;
462 while (pList->next != &pTS->RxPendingPktList) {
463 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
464 list_entry(pList->next, struct rx_reorder_entry,
467 else if (SN_EQUAL(pReorderEntry->SeqNum,
468 ((struct rx_reorder_entry *)list_entry(pList->next,
469 struct rx_reorder_entry, List))->SeqNum))
474 pReorderEntry->List.next = pList->next;
475 pReorderEntry->List.next->prev = &pReorderEntry->List;
476 pReorderEntry->List.prev = pList;
477 pList->next = &pReorderEntry->List;
482 void rtllib_indicate_packets(struct rtllib_device *ieee,
483 struct rtllib_rxb **prxbIndicateArray, u8 index)
485 struct net_device_stats *stats = &ieee->stats;
489 for (j = 0; j < index; j++) {
490 struct rtllib_rxb *prxb = prxbIndicateArray[j];
492 for (i = 0; i < prxb->nr_subframes; i++) {
493 struct sk_buff *sub_skb = prxb->subframes[i];
495 /* convert hdr + possible LLC headers into Ethernet header */
496 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
497 if (sub_skb->len >= 8 &&
498 ((memcmp(sub_skb->data, rfc1042_header,
500 ethertype != ETH_P_AARP &&
501 ethertype != ETH_P_IPX) ||
502 memcmp(sub_skb->data, bridge_tunnel_header,
504 /* remove RFC1042 or Bridge-Tunnel encapsulation
505 * and replace EtherType
507 skb_pull(sub_skb, SNAP_SIZE);
508 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
509 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
512 /* Leave Ethernet header part of hdr and full payload */
514 memcpy(skb_push(sub_skb, 2), &len, 2);
515 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
516 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
519 /* Indicate the packets to upper layer */
522 stats->rx_bytes += sub_skb->len;
524 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
525 sub_skb->protocol = eth_type_trans(sub_skb,
527 sub_skb->dev = ieee->dev;
528 sub_skb->dev->stats.rx_packets++;
529 sub_skb->dev->stats.rx_bytes += sub_skb->len;
530 /* 802.11 crc not sufficient */
531 sub_skb->ip_summed = CHECKSUM_NONE;
532 ieee->last_rx_ps_time = jiffies;
541 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,
542 struct rx_ts_record *pTS)
544 struct rx_reorder_entry *pRxReorderEntry;
547 del_timer_sync(&pTS->RxPktPendingTimer);
548 while (!list_empty(&pTS->RxPendingPktList)) {
549 if (RfdCnt >= REORDER_WIN_SIZE) {
550 netdev_info(ieee->dev,
551 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
556 pRxReorderEntry = (struct rx_reorder_entry *)
557 list_entry(pTS->RxPendingPktList.prev,
558 struct rx_reorder_entry, List);
559 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__,
560 pRxReorderEntry->SeqNum);
561 list_del_init(&pRxReorderEntry->List);
563 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
566 list_add_tail(&pRxReorderEntry->List,
567 &ieee->RxReorder_Unused_List);
569 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
571 pTS->RxIndicateSeq = 0xffff;
574 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
575 struct rtllib_rxb *prxb,
576 struct rx_ts_record *pTS, u16 SeqNum)
578 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
579 struct rx_reorder_entry *pReorderEntry = NULL;
580 u8 WinSize = pHTInfo->RxReorderWinSize;
583 bool bMatchWinStart = false, bPktInBuf = false;
586 netdev_dbg(ieee->dev,
587 "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n",
588 __func__, SeqNum, pTS->RxIndicateSeq, WinSize);
590 spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
592 WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
593 /* Rx Reorder initialize condition.*/
594 if (pTS->RxIndicateSeq == 0xffff)
595 pTS->RxIndicateSeq = SeqNum;
597 /* Drop out the packet which SeqNum is smaller than WinStart */
598 if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
599 netdev_dbg(ieee->dev,
600 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
601 pTS->RxIndicateSeq, SeqNum);
602 pHTInfo->RxReorderDropCounter++;
606 for (i = 0; i < prxb->nr_subframes; i++)
607 dev_kfree_skb(prxb->subframes[i]);
611 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
615 /* Sliding window manipulation. Conditions includes:
616 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
617 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
619 if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
620 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
621 bMatchWinStart = true;
622 } else if (SN_LESS(WinEnd, SeqNum)) {
623 if (SeqNum >= (WinSize - 1))
624 pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
626 pTS->RxIndicateSeq = 4095 -
627 (WinSize - (SeqNum + 1)) + 1;
628 netdev_dbg(ieee->dev,
629 "Window Shift! IndicateSeq: %d, NewSeq: %d\n",
630 pTS->RxIndicateSeq, SeqNum);
633 /* Indication process.
634 * After Packet dropping and Sliding Window shifting as above, we can
635 * now just indicate the packets with the SeqNum smaller than latest
636 * WinStart and struct buffer other packets.
638 * For Rx Reorder condition:
639 * 1. All packets with SeqNum smaller than WinStart => Indicate
640 * 2. All packets with SeqNum larger than or equal to
641 * WinStart => Buffer it.
643 if (bMatchWinStart) {
644 /* Current packet is going to be indicated.*/
645 netdev_dbg(ieee->dev,
646 "Packets indication! IndicateSeq: %d, NewSeq: %d\n",
647 pTS->RxIndicateSeq, SeqNum);
648 ieee->prxbIndicateArray[0] = prxb;
651 /* Current packet is going to be inserted into pending list.*/
652 if (!list_empty(&ieee->RxReorder_Unused_List)) {
653 pReorderEntry = (struct rx_reorder_entry *)
654 list_entry(ieee->RxReorder_Unused_List.next,
655 struct rx_reorder_entry, List);
656 list_del_init(&pReorderEntry->List);
658 /* Make a reorder entry and insert
659 * into a the packet list.
661 pReorderEntry->SeqNum = SeqNum;
662 pReorderEntry->prxb = prxb;
664 if (!AddReorderEntry(pTS, pReorderEntry)) {
667 netdev_dbg(ieee->dev,
668 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n",
669 __func__, pTS->RxIndicateSeq,
671 list_add_tail(&pReorderEntry->List,
672 &ieee->RxReorder_Unused_List);
674 for (i = 0; i < prxb->nr_subframes; i++)
675 dev_kfree_skb(prxb->subframes[i]);
679 netdev_dbg(ieee->dev,
680 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n",
681 pTS->RxIndicateSeq, SeqNum);
684 /* Packets are dropped if there are not enough reorder
685 * entries. This part should be modified!! We can just
686 * indicate all the packets in struct buffer and get
689 netdev_err(ieee->dev,
690 "%s(): There is no reorder entry! Packet is dropped!\n",
695 for (i = 0; i < prxb->nr_subframes; i++)
696 dev_kfree_skb(prxb->subframes[i]);
703 /* Check if there is any packet need indicate.*/
704 while (!list_empty(&pTS->RxPendingPktList)) {
705 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n",
708 pReorderEntry = (struct rx_reorder_entry *)
709 list_entry(pTS->RxPendingPktList.prev,
710 struct rx_reorder_entry,
712 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
713 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
714 /* This protect struct buffer from overflow. */
715 if (index >= REORDER_WIN_SIZE) {
716 netdev_err(ieee->dev,
717 "%s(): Buffer overflow!\n",
723 list_del_init(&pReorderEntry->List);
725 if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
726 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) %
729 ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
730 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n",
731 __func__, pReorderEntry->SeqNum);
734 list_add_tail(&pReorderEntry->List,
735 &ieee->RxReorder_Unused_List);
742 /* Handling pending timer. Set this timer to prevent from long time
746 if (timer_pending(&pTS->RxPktPendingTimer))
747 del_timer_sync(&pTS->RxPktPendingTimer);
748 pTS->RxTimeoutIndicateSeq = 0xffff;
750 if (index > REORDER_WIN_SIZE) {
751 netdev_err(ieee->dev,
752 "%s(): Rx Reorder struct buffer full!\n",
754 spin_unlock_irqrestore(&(ieee->reorder_spinlock),
758 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
762 if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
763 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__);
764 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
765 mod_timer(&pTS->RxPktPendingTimer, jiffies +
766 msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
768 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
771 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
772 struct rtllib_rx_stats *rx_stats,
773 struct rtllib_rxb *rxb, u8 *src, u8 *dst)
775 struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
776 u16 fc = le16_to_cpu(hdr->frame_ctl);
778 u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
780 bool bIsAggregateFrame = false;
781 u16 nSubframe_Length;
782 u8 nPadding_Length = 0;
784 struct sk_buff *sub_skb;
786 /* just for debug purpose */
787 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
788 if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
789 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
790 bIsAggregateFrame = true;
792 if (RTLLIB_QOS_HAS_SEQ(fc))
794 if (rx_stats->bContainHTC)
795 LLCOffset += sHTCLng;
797 ChkLength = LLCOffset;
799 if (skb->len <= ChkLength)
802 skb_pull(skb, LLCOffset);
803 ieee->bIsAggregateFrame = bIsAggregateFrame;
804 if (!bIsAggregateFrame) {
805 rxb->nr_subframes = 1;
807 /* altered by clark 3/30/2010
808 * The struct buffer size of the skb indicated to upper layer
809 * must be less than 5000, or the defraged IP datagram
810 * in the IP layer will exceed "ipfrag_high_tresh" and be
811 * discarded. so there must not use the function
812 * "skb_copy" and "skb_clone" for "skb".
815 /* Allocate new skb for releasing to upper layer */
816 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
819 skb_reserve(sub_skb, 12);
820 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
821 memcpy(data_ptr, skb->data, skb->len);
822 sub_skb->dev = ieee->dev;
824 rxb->subframes[0] = sub_skb;
826 memcpy(rxb->src, src, ETH_ALEN);
827 memcpy(rxb->dst, dst, ETH_ALEN);
828 rxb->subframes[0]->dev = ieee->dev;
832 rxb->nr_subframes = 0;
833 memcpy(rxb->src, src, ETH_ALEN);
834 memcpy(rxb->dst, dst, ETH_ALEN);
835 while (skb->len > ETHERNET_HEADER_SIZE) {
836 /* Offset 12 denote 2 mac address */
837 nSubframe_Length = *((u16 *)(skb->data + 12));
838 nSubframe_Length = (nSubframe_Length >> 8) +
839 (nSubframe_Length << 8);
841 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
842 netdev_info(ieee->dev,
843 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
844 __func__, rxb->nr_subframes);
845 netdev_info(ieee->dev,
846 "%s: A-MSDU parse error!! Subframe Length: %d\n",
847 __func__, nSubframe_Length);
848 netdev_info(ieee->dev,
849 "nRemain_Length is %d and nSubframe_Length is : %d\n",
850 skb->len, nSubframe_Length);
851 netdev_info(ieee->dev,
852 "The Packet SeqNum is %d\n",
857 /* move the data point to data content */
858 skb_pull(skb, ETHERNET_HEADER_SIZE);
860 /* altered by clark 3/30/2010
861 * The struct buffer size of the skb indicated to upper layer
862 * must be less than 5000, or the defraged IP datagram
863 * in the IP layer will exceed "ipfrag_high_tresh" and be
864 * discarded. so there must not use the function
865 * "skb_copy" and "skb_clone" for "skb".
868 /* Allocate new skb for releasing to upper layer */
869 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
872 skb_reserve(sub_skb, 12);
873 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
874 memcpy(data_ptr, skb->data, nSubframe_Length);
876 sub_skb->dev = ieee->dev;
877 rxb->subframes[rxb->nr_subframes++] = sub_skb;
878 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
879 netdev_dbg(ieee->dev,
880 "ParseSubframe(): Too many Subframes! Packets dropped!\n");
883 skb_pull(skb, nSubframe_Length);
886 nPadding_Length = 4 - ((nSubframe_Length +
887 ETHERNET_HEADER_SIZE) % 4);
888 if (nPadding_Length == 4)
891 if (skb->len < nPadding_Length)
894 skb_pull(skb, nPadding_Length);
898 return rxb->nr_subframes;
902 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
904 struct rtllib_rx_stats *rx_stats)
906 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
907 u16 fc = le16_to_cpu(hdr->frame_ctl);
910 hdrlen = rtllib_get_hdrlen(fc);
911 if (HTCCheck(ieee, skb->data)) {
913 netdev_info(ieee->dev, "%s: find HTCControl!\n",
916 rx_stats->bContainHTC = true;
919 if (RTLLIB_QOS_HAS_SEQ(fc))
920 rx_stats->bIsQosData = true;
925 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
926 struct sk_buff *skb, u8 multicast)
928 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
930 u8 frag, type, stype;
932 fc = le16_to_cpu(hdr->frame_ctl);
933 type = WLAN_FC_GET_TYPE(fc);
934 stype = WLAN_FC_GET_STYPE(fc);
935 sc = le16_to_cpu(hdr->seq_ctl);
936 frag = WLAN_GET_SEQ_FRAG(sc);
938 if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
939 !ieee->current_network.qos_data.active ||
940 !IsDataFrame(skb->data) ||
941 IsLegacyDataFrame(skb->data)) {
942 if (!((type == RTLLIB_FTYPE_MGMT) &&
943 (stype == RTLLIB_STYPE_BEACON))) {
944 if (is_duplicate_packet(ieee, hdr))
948 struct rx_ts_record *pRxTS = NULL;
950 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
951 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
952 if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
953 (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
955 pRxTS->RxLastFragNum = frag;
956 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
958 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n",
967 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
968 struct rtllib_hdr_4addr *hdr, u8 *dst,
971 u16 fc = le16_to_cpu(hdr->frame_ctl);
973 switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
974 case RTLLIB_FCTL_FROMDS:
975 ether_addr_copy(dst, hdr->addr1);
976 ether_addr_copy(src, hdr->addr3);
977 ether_addr_copy(bssid, hdr->addr2);
979 case RTLLIB_FCTL_TODS:
980 ether_addr_copy(dst, hdr->addr3);
981 ether_addr_copy(src, hdr->addr2);
982 ether_addr_copy(bssid, hdr->addr1);
984 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
985 ether_addr_copy(dst, hdr->addr3);
986 ether_addr_copy(src, hdr->addr4);
987 ether_addr_copy(bssid, ieee->current_network.bssid);
990 ether_addr_copy(dst, hdr->addr1);
991 ether_addr_copy(src, hdr->addr2);
992 ether_addr_copy(bssid, hdr->addr3);
997 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
998 u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
1002 type = WLAN_FC_GET_TYPE(fc);
1003 stype = WLAN_FC_GET_STYPE(fc);
1005 /* Filter frames from different BSS */
1006 if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
1007 !ether_addr_equal(ieee->current_network.bssid, bssid) &&
1008 !is_zero_ether_addr(ieee->current_network.bssid)) {
1012 /* Filter packets sent by an STA that will be forwarded by AP */
1013 if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
1014 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
1015 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
1016 !ether_addr_equal(dst, ieee->current_network.bssid) &&
1017 ether_addr_equal(bssid, ieee->current_network.bssid)) {
1022 /* Nullfunc frames may have PS-bit set, so they must be passed to
1023 * hostap_handle_sta_rx() before being dropped here.
1025 if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
1026 if (stype != RTLLIB_STYPE_DATA &&
1027 stype != RTLLIB_STYPE_DATA_CFACK &&
1028 stype != RTLLIB_STYPE_DATA_CFPOLL &&
1029 stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
1030 stype != RTLLIB_STYPE_QOS_DATA) {
1031 if (stype != RTLLIB_STYPE_NULLFUNC)
1032 netdev_dbg(ieee->dev,
1033 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
1039 if (ieee->iw_mode != IW_MODE_MESH) {
1040 /* packets from our adapter are dropped (echo) */
1041 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1044 /* {broad,multi}cast packets to our BSS go through */
1045 if (is_multicast_ether_addr(dst)) {
1046 if (memcmp(bssid, ieee->current_network.bssid,
1054 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1055 struct lib80211_crypt_data **crypt, size_t hdrlen)
1057 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1058 u16 fc = le16_to_cpu(hdr->frame_ctl);
1061 if (ieee->host_decrypt) {
1062 if (skb->len >= hdrlen + 3)
1063 idx = skb->data[hdrlen + 3] >> 6;
1065 *crypt = ieee->crypt_info.crypt[idx];
1066 /* allow NULL decrypt to indicate an station specific override
1067 * for default encryption
1069 if (*crypt && ((*crypt)->ops == NULL ||
1070 (*crypt)->ops->decrypt_mpdu == NULL))
1073 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1074 /* This seems to be triggered by some (multicast?)
1075 * frames from other than current BSS, so just drop the
1076 * frames silently instead of filling system log with
1079 netdev_dbg(ieee->dev,
1080 "Decryption failed (not set) (SA= %pM)\n",
1089 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1090 struct rtllib_rx_stats *rx_stats,
1091 struct lib80211_crypt_data *crypt, size_t hdrlen)
1093 struct rtllib_hdr_4addr *hdr;
1098 hdr = (struct rtllib_hdr_4addr *)skb->data;
1099 fc = le16_to_cpu(hdr->frame_ctl);
1100 sc = le16_to_cpu(hdr->seq_ctl);
1101 frag = WLAN_GET_SEQ_FRAG(sc);
1103 if ((!rx_stats->Decrypted))
1104 ieee->need_sw_enc = 1;
1106 ieee->need_sw_enc = 0;
1108 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1109 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1110 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1114 hdr = (struct rtllib_hdr_4addr *) skb->data;
1115 if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1117 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1119 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag);
1122 netdev_dbg(ieee->dev,
1123 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1124 (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1125 WLAN_GET_SEQ_SEQ(sc), frag);
1132 if (frag_skb->tail + flen > frag_skb->end) {
1133 netdev_warn(ieee->dev,
1134 "%s: host decrypted and reassembled frame did not fit skb\n",
1136 rtllib_frag_cache_invalidate(ieee, hdr);
1141 /* copy first fragment (including full headers) into
1142 * beginning of the fragment cache skb
1144 memcpy(skb_put(frag_skb, flen), skb->data, flen);
1146 /* append frame payload to the end of the fragment
1149 memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1152 dev_kfree_skb_any(skb);
1155 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1156 /* more fragments expected - leave the skb in fragment
1157 * cache for now; it will be delivered to upper layers
1158 * after all fragments have been received
1163 /* this was the last fragment and the frame will be
1164 * delivered, so remove skb from fragment cache
1167 hdr = (struct rtllib_hdr_4addr *) skb->data;
1168 rtllib_frag_cache_invalidate(ieee, hdr);
1171 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1172 * encrypted/authenticated
1174 if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1175 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1176 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1180 hdr = (struct rtllib_hdr_4addr *) skb->data;
1181 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1182 if (/*ieee->ieee802_1x &&*/
1183 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1185 /* pass unencrypted EAPOL frames even if encryption is
1188 struct eapol *eap = (struct eapol *)(skb->data +
1190 netdev_dbg(ieee->dev,
1191 "RX: IEEE 802.1X EAPOL frame: %s\n",
1192 eap_get_type(eap->type));
1194 netdev_dbg(ieee->dev,
1195 "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1201 if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1202 rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1203 struct eapol *eap = (struct eapol *)(skb->data +
1205 netdev_dbg(ieee->dev,
1206 "RX: IEEE 802.1X EAPOL frame: %s\n",
1207 eap_get_type(eap->type));
1210 if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1211 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1212 netdev_dbg(ieee->dev,
1213 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1218 if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1219 netdev_warn(ieee->dev, "RX: IEEE802.1X EAPOL frame!\n");
1224 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast,
1229 if (ieee->state == RTLLIB_LINKED) {
1230 if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1231 ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1232 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1233 if (ieee->LeisurePSLeave)
1234 ieee->LeisurePSLeave(ieee->dev);
1238 ieee->last_rx_ps_time = jiffies;
1241 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1242 struct rtllib_rx_stats *rx_stats,
1243 struct rtllib_rxb *rxb,
1247 struct net_device *dev = ieee->dev;
1252 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1256 for (i = 0; i < rxb->nr_subframes; i++) {
1257 struct sk_buff *sub_skb = rxb->subframes[i];
1260 /* convert hdr + possible LLC headers
1261 * into Ethernet header
1263 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1264 if (sub_skb->len >= 8 &&
1265 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1266 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1267 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1268 /* remove RFC1042 or Bridge-Tunnel encapsulation
1269 * and replace EtherType
1271 skb_pull(sub_skb, SNAP_SIZE);
1272 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1274 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1278 /* Leave Ethernet header part of hdr
1282 memcpy(skb_push(sub_skb, 2), &len, 2);
1283 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1285 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1289 ieee->stats.rx_packets++;
1290 ieee->stats.rx_bytes += sub_skb->len;
1292 if (is_multicast_ether_addr(dst))
1293 ieee->stats.multicast++;
1295 /* Indicate the packets to upper layer */
1296 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1297 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1299 sub_skb->dev->stats.rx_packets++;
1300 sub_skb->dev->stats.rx_bytes += sub_skb->len;
1301 /* 802.11 crc not sufficient */
1302 sub_skb->ip_summed = CHECKSUM_NONE;
1309 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1310 struct rtllib_rx_stats *rx_stats)
1312 struct net_device *dev = ieee->dev;
1313 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1314 struct lib80211_crypt_data *crypt = NULL;
1315 struct rtllib_rxb *rxb = NULL;
1316 struct rx_ts_record *pTS = NULL;
1317 u16 fc, sc, SeqNum = 0;
1318 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1322 u8 bssid[ETH_ALEN] = {0};
1325 bool bToOtherSTA = false;
1328 hdr = (struct rtllib_hdr_4addr *)skb->data;
1329 fc = le16_to_cpu(hdr->frame_ctl);
1330 type = WLAN_FC_GET_TYPE(fc);
1331 stype = WLAN_FC_GET_STYPE(fc);
1332 sc = le16_to_cpu(hdr->seq_ctl);
1334 /*Filter pkt not to me*/
1335 multicast = is_multicast_ether_addr(hdr->addr1);
1336 unicast = !multicast;
1337 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1338 if (ieee->bNetPromiscuousMode)
1344 /*Filter pkt has too small length */
1345 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1346 if (skb->len < hdrlen) {
1348 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1353 /* Filter Duplicate pkt */
1354 ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1358 /* Filter CTRL Frame */
1359 if (type == RTLLIB_FTYPE_CTL)
1362 /* Filter MGNT Frame */
1363 if (type == RTLLIB_FTYPE_MGMT) {
1366 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1372 /* Filter WAPI DATA Frame */
1374 /* Update statstics for AP roaming */
1376 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1377 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1379 dev->last_rx = jiffies;
1381 /* Data frame - extract src/dst addresses */
1382 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1384 /* Filter Data frames */
1385 ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1389 if (skb->len == hdrlen)
1392 /* Send pspoll based on moredata */
1393 if ((ieee->iw_mode == IW_MODE_INFRA) &&
1394 (ieee->sta_sleep == LPS_IS_SLEEP) &&
1395 (ieee->polling) && (!bToOtherSTA)) {
1396 if (WLAN_FC_MORE_DATA(fc)) {
1397 /* more data bit is set, let's request a new frame
1400 rtllib_sta_ps_send_pspoll_frame(ieee);
1402 ieee->polling = false;
1406 /* Get crypt if encrypted */
1407 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1411 /* Decrypt data frame (including reassemble) */
1412 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1418 /* Get TS for Rx Reorder */
1419 hdr = (struct rtllib_hdr_4addr *) skb->data;
1420 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1421 && !is_multicast_ether_addr(hdr->addr1)
1422 && (!bToOtherSTA)) {
1423 TID = Frame_QoSTID(skb->data);
1424 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1425 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID,
1427 if (TID != 0 && TID != 3)
1428 ieee->bis_any_nonbepkts = true;
1431 /* Parse rx data frame (For AMSDU) */
1432 /* skb: hdr + (possible reassembled) full plaintext payload */
1433 payload = skb->data + hdrlen;
1434 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1438 /* to parse amsdu packets */
1439 /* qos data packets & reserved bit is 1 */
1440 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1441 /* only to free rxb, and not submit the packets
1444 for (i = 0; i < rxb->nr_subframes; i++)
1445 dev_kfree_skb(rxb->subframes[i]);
1451 /* Update WAPI PN */
1453 /* Check if leave LPS */
1455 if (ieee->bIsAggregateFrame)
1456 nr_subframes = rxb->nr_subframes;
1460 ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1461 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1464 /* Indicate packets to upper layer or Rx Reorder */
1465 if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL ||
1467 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1469 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1477 ieee->stats.rx_dropped++;
1479 /* Returning 0 indicates to caller that we have not handled the SKB--
1480 * so it is still allocated and can be used again by underlying
1481 * hardware as a DMA target
1486 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1487 struct rtllib_rx_stats *rx_stats)
1492 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1493 struct rtllib_rx_stats *rx_stats)
1495 struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1496 u16 fc = le16_to_cpu(hdr->frame_ctl);
1497 size_t hdrlen = rtllib_get_hdrlen(fc);
1499 if (skb->len < hdrlen) {
1500 netdev_info(ieee->dev,
1501 "%s():ERR!!! skb->len is smaller than hdrlen\n",
1506 if (HTCCheck(ieee, skb->data)) {
1507 if (net_ratelimit())
1508 netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1513 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1514 ieee->stats.rx_packets++;
1515 ieee->stats.rx_bytes += skb->len;
1520 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1521 struct rtllib_rx_stats *rx_stats)
1526 /* All received frames are sent to this function. @skb contains the frame in
1527 * IEEE 802.11 format, i.e., in the format it was sent over air.
1528 * This function is called only as a tasklet (software IRQ).
1530 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1531 struct rtllib_rx_stats *rx_stats)
1535 if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1536 pr_info("%s: Input parameters NULL!\n", __func__);
1539 if (skb->len < 10) {
1540 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1544 switch (ieee->iw_mode) {
1547 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1549 case IW_MODE_MASTER:
1550 case IW_MODE_REPEAT:
1551 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1553 case IW_MODE_MONITOR:
1554 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1557 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1560 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1568 ieee->stats.rx_dropped++;
1571 EXPORT_SYMBOL(rtllib_rx);
1573 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1575 /* Make ther structure we read from the beacon packet has the right values */
1576 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1577 *info_element, int sub_type)
1580 if (info_element->qui_subtype != sub_type)
1582 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1584 if (info_element->qui_type != QOS_OUI_TYPE)
1586 if (info_element->version != QOS_VERSION_1)
1593 /* Parse a QoS parameter element */
1594 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1596 struct rtllib_info_element
1600 u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1602 if ((info_element == NULL) || (element_param == NULL))
1605 if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1606 memcpy(element_param->info_element.qui, info_element->data,
1608 element_param->info_element.elementID = info_element->id;
1609 element_param->info_element.length = info_element->len;
1613 ret = rtllib_verify_qos_info(&element_param->info_element,
1614 QOS_OUI_PARAM_SUB_TYPE);
1618 /* Parse a QoS information element */
1619 static int rtllib_read_qos_info_element(struct rtllib_qos_information_element
1621 struct rtllib_info_element
1625 u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1627 if (element_info == NULL)
1629 if (info_element == NULL)
1632 if ((info_element->id == QOS_ELEMENT_ID) &&
1633 (info_element->len == size)) {
1634 memcpy(element_info->qui, info_element->data,
1636 element_info->elementID = info_element->id;
1637 element_info->length = info_element->len;
1642 ret = rtllib_verify_qos_info(element_info,
1643 QOS_OUI_INFO_SUB_TYPE);
1648 /* Write QoS parameters from the ac parameters. */
1649 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1650 struct rtllib_qos_data *qos_data)
1652 struct rtllib_qos_ac_parameter *ac_params;
1653 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1658 qos_data->wmm_acm = 0;
1659 for (i = 0; i < QOS_QUEUE_NUM; i++) {
1660 ac_params = &(param_elm->ac_params_record[i]);
1662 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1663 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1665 if (aci >= QOS_QUEUE_NUM)
1669 /* BIT(0) | BIT(3) */
1671 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1674 /* BIT(4) | BIT(5) */
1676 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1679 /* BIT(6) | BIT(7) */
1681 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1685 /* BIT(1) | BIT(2) */
1687 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1691 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1693 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1694 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2);
1696 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max &
1699 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max &
1702 qos_param->flag[aci] =
1703 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1704 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1709 /* we have a generic data element which it may contain QoS information or
1710 * parameters element. check the information element length to decide
1711 * which type to read
1713 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee,
1714 struct rtllib_info_element
1716 struct rtllib_network *network)
1719 struct rtllib_qos_information_element qos_info_element;
1721 rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1724 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1725 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1727 struct rtllib_qos_parameter_info param_element;
1729 rc = rtllib_read_qos_param_element(¶m_element,
1732 rtllib_qos_convert_ac_to_parameters(¶m_element,
1733 &(network->qos_data));
1734 network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1735 network->qos_data.param_count =
1736 param_element.info_element.ac_info & 0x0F;
1741 netdev_dbg(ieee->dev, "QoS is supported\n");
1742 network->qos_data.supported = 1;
1747 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1749 static const char *get_info_element_string(u16 id)
1754 MFIE_STRING(FH_SET);
1755 MFIE_STRING(DS_SET);
1756 MFIE_STRING(CF_SET);
1758 MFIE_STRING(IBSS_SET);
1759 MFIE_STRING(COUNTRY);
1760 MFIE_STRING(HOP_PARAMS);
1761 MFIE_STRING(HOP_TABLE);
1762 MFIE_STRING(REQUEST);
1763 MFIE_STRING(CHALLENGE);
1764 MFIE_STRING(POWER_CONSTRAINT);
1765 MFIE_STRING(POWER_CAPABILITY);
1766 MFIE_STRING(TPC_REQUEST);
1767 MFIE_STRING(TPC_REPORT);
1768 MFIE_STRING(SUPP_CHANNELS);
1770 MFIE_STRING(MEASURE_REQUEST);
1771 MFIE_STRING(MEASURE_REPORT);
1773 MFIE_STRING(IBSS_DFS);
1775 MFIE_STRING(RATES_EX);
1776 MFIE_STRING(GENERIC);
1777 MFIE_STRING(QOS_PARAMETER);
1783 static inline void rtllib_extract_country_ie(
1784 struct rtllib_device *ieee,
1785 struct rtllib_info_element *info_element,
1786 struct rtllib_network *network,
1789 if (IS_DOT11D_ENABLE(ieee)) {
1790 if (info_element->len != 0) {
1791 memcpy(network->CountryIeBuf, info_element->data,
1793 network->CountryIeLen = info_element->len;
1795 if (!IS_COUNTRY_IE_VALID(ieee)) {
1796 if (rtllib_act_scanning(ieee, false) &&
1797 ieee->FirstIe_InScan)
1798 netdev_info(ieee->dev,
1799 "Received beacon ContryIE, SSID: <%s>\n",
1801 Dot11d_UpdateCountryIe(ieee, addr2,
1803 info_element->data);
1807 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1808 UPDATE_CIE_WATCHDOG(ieee);
1813 static void rtllib_parse_mife_generic(struct rtllib_device *ieee,
1814 struct rtllib_info_element *info_element,
1815 struct rtllib_network *network,
1817 u16 *tmp_htinfo_len)
1819 u16 ht_realtek_agg_len = 0;
1820 u8 ht_realtek_agg_buf[MAX_IE_LEN];
1822 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network))
1824 if (info_element->len >= 4 &&
1825 info_element->data[0] == 0x00 &&
1826 info_element->data[1] == 0x50 &&
1827 info_element->data[2] == 0xf2 &&
1828 info_element->data[3] == 0x01) {
1829 network->wpa_ie_len = min(info_element->len + 2,
1831 memcpy(network->wpa_ie, info_element, network->wpa_ie_len);
1834 if (info_element->len == 7 &&
1835 info_element->data[0] == 0x00 &&
1836 info_element->data[1] == 0xe0 &&
1837 info_element->data[2] == 0x4c &&
1838 info_element->data[3] == 0x01 &&
1839 info_element->data[4] == 0x02)
1840 network->Turbo_Enable = 1;
1842 if (*tmp_htcap_len == 0) {
1843 if (info_element->len >= 4 &&
1844 info_element->data[0] == 0x00 &&
1845 info_element->data[1] == 0x90 &&
1846 info_element->data[2] == 0x4c &&
1847 info_element->data[3] == 0x033) {
1848 *tmp_htcap_len = min_t(u8, info_element->len,
1850 if (*tmp_htcap_len != 0) {
1851 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1852 network->bssht.bdHTCapLen = min_t(u16, *tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf));
1853 memcpy(network->bssht.bdHTCapBuf,
1855 network->bssht.bdHTCapLen);
1858 if (*tmp_htcap_len != 0) {
1859 network->bssht.bdSupportHT = true;
1860 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1862 network->bssht.bdSupportHT = false;
1863 network->bssht.bdHT1R = false;
1868 if (*tmp_htinfo_len == 0) {
1869 if (info_element->len >= 4 &&
1870 info_element->data[0] == 0x00 &&
1871 info_element->data[1] == 0x90 &&
1872 info_element->data[2] == 0x4c &&
1873 info_element->data[3] == 0x034) {
1874 *tmp_htinfo_len = min_t(u8, info_element->len,
1876 if (*tmp_htinfo_len != 0) {
1877 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1878 network->bssht.bdHTInfoLen = min_t(u16, *tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf));
1879 memcpy(network->bssht.bdHTInfoBuf,
1881 network->bssht.bdHTInfoLen);
1887 if (network->bssht.bdSupportHT) {
1888 if (info_element->len >= 4 &&
1889 info_element->data[0] == 0x00 &&
1890 info_element->data[1] == 0xe0 &&
1891 info_element->data[2] == 0x4c &&
1892 info_element->data[3] == 0x02) {
1893 ht_realtek_agg_len = min_t(u8, info_element->len,
1895 memcpy(ht_realtek_agg_buf, info_element->data,
1898 if (ht_realtek_agg_len >= 5) {
1899 network->realtek_cap_exit = true;
1900 network->bssht.bdRT2RTAggregation = true;
1902 if ((ht_realtek_agg_buf[4] == 1) &&
1903 (ht_realtek_agg_buf[5] & 0x02))
1904 network->bssht.bdRT2RTLongSlotTime = true;
1906 if ((ht_realtek_agg_buf[4] == 1) &&
1907 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1908 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1911 if (ht_realtek_agg_len >= 5) {
1912 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1913 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1916 if ((info_element->len >= 3 &&
1917 info_element->data[0] == 0x00 &&
1918 info_element->data[1] == 0x05 &&
1919 info_element->data[2] == 0xb5) ||
1920 (info_element->len >= 3 &&
1921 info_element->data[0] == 0x00 &&
1922 info_element->data[1] == 0x0a &&
1923 info_element->data[2] == 0xf7) ||
1924 (info_element->len >= 3 &&
1925 info_element->data[0] == 0x00 &&
1926 info_element->data[1] == 0x10 &&
1927 info_element->data[2] == 0x18)) {
1928 network->broadcom_cap_exist = true;
1930 if (info_element->len >= 3 &&
1931 info_element->data[0] == 0x00 &&
1932 info_element->data[1] == 0x0c &&
1933 info_element->data[2] == 0x43)
1934 network->ralink_cap_exist = true;
1935 if ((info_element->len >= 3 &&
1936 info_element->data[0] == 0x00 &&
1937 info_element->data[1] == 0x03 &&
1938 info_element->data[2] == 0x7f) ||
1939 (info_element->len >= 3 &&
1940 info_element->data[0] == 0x00 &&
1941 info_element->data[1] == 0x13 &&
1942 info_element->data[2] == 0x74))
1943 network->atheros_cap_exist = true;
1945 if ((info_element->len >= 3 &&
1946 info_element->data[0] == 0x00 &&
1947 info_element->data[1] == 0x50 &&
1948 info_element->data[2] == 0x43))
1949 network->marvell_cap_exist = true;
1950 if (info_element->len >= 3 &&
1951 info_element->data[0] == 0x00 &&
1952 info_element->data[1] == 0x40 &&
1953 info_element->data[2] == 0x96)
1954 network->cisco_cap_exist = true;
1957 if (info_element->len >= 3 &&
1958 info_element->data[0] == 0x00 &&
1959 info_element->data[1] == 0x0a &&
1960 info_element->data[2] == 0xf5)
1961 network->airgo_cap_exist = true;
1963 if (info_element->len > 4 &&
1964 info_element->data[0] == 0x00 &&
1965 info_element->data[1] == 0x40 &&
1966 info_element->data[2] == 0x96 &&
1967 info_element->data[3] == 0x01) {
1968 if (info_element->len == 6) {
1969 memcpy(network->CcxRmState, &info_element[4], 2);
1970 if (network->CcxRmState[0] != 0)
1971 network->bCcxRmEnable = true;
1973 network->bCcxRmEnable = false;
1974 network->MBssidMask = network->CcxRmState[1] & 0x07;
1975 if (network->MBssidMask != 0) {
1976 network->bMBssidValid = true;
1977 network->MBssidMask = 0xff <<
1978 (network->MBssidMask);
1979 ether_addr_copy(network->MBssid,
1981 network->MBssid[5] &= network->MBssidMask;
1983 network->bMBssidValid = false;
1986 network->bCcxRmEnable = false;
1989 if (info_element->len > 4 &&
1990 info_element->data[0] == 0x00 &&
1991 info_element->data[1] == 0x40 &&
1992 info_element->data[2] == 0x96 &&
1993 info_element->data[3] == 0x03) {
1994 if (info_element->len == 5) {
1995 network->bWithCcxVerNum = true;
1996 network->BssCcxVerNumber = info_element->data[4];
1998 network->bWithCcxVerNum = false;
1999 network->BssCcxVerNumber = 0;
2002 if (info_element->len > 4 &&
2003 info_element->data[0] == 0x00 &&
2004 info_element->data[1] == 0x50 &&
2005 info_element->data[2] == 0xf2 &&
2006 info_element->data[3] == 0x04) {
2007 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n",
2009 network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN);
2010 memcpy(network->wzc_ie, info_element, network->wzc_ie_len);
2014 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element,
2015 struct rtllib_network *network,
2018 struct bss_ht *ht = &network->bssht;
2020 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2021 if (*tmp_htcap_len != 0) {
2022 ht->bdHTSpecVer = HT_SPEC_VER_EWC;
2023 ht->bdHTCapLen = min_t(u16, *tmp_htcap_len,
2024 sizeof(ht->bdHTCapBuf));
2025 memcpy(ht->bdHTCapBuf, info_element->data, ht->bdHTCapLen);
2027 ht->bdSupportHT = true;
2028 ht->bdHT1R = ((((struct ht_capab_ele *)
2029 ht->bdHTCapBuf))->MCS[1]) == 0;
2031 ht->bdBandWidth = (enum ht_channel_width)
2032 (((struct ht_capab_ele *)
2033 (ht->bdHTCapBuf))->ChlWidth);
2035 ht->bdSupportHT = false;
2037 ht->bdBandWidth = HT_CHANNEL_WIDTH_20;
2041 int rtllib_parse_info_param(struct rtllib_device *ieee,
2042 struct rtllib_info_element *info_element,
2044 struct rtllib_network *network,
2045 struct rtllib_rx_stats *stats)
2049 u16 tmp_htcap_len = 0;
2050 u16 tmp_htinfo_len = 0;
2054 while (length >= sizeof(*info_element)) {
2055 if (sizeof(*info_element) + info_element->len > length) {
2056 netdev_dbg(ieee->dev,
2057 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
2058 info_element->len + sizeof(*info_element),
2059 length, info_element->id);
2060 /* We stop processing but don't return an error here
2061 * because some misbehaviour APs break this rule. ie.
2067 switch (info_element->id) {
2068 case MFIE_TYPE_SSID:
2069 if (rtllib_is_empty_essid(info_element->data,
2070 info_element->len)) {
2071 network->flags |= NETWORK_EMPTY_ESSID;
2075 network->ssid_len = min(info_element->len,
2076 (u8) IW_ESSID_MAX_SIZE);
2077 memcpy(network->ssid, info_element->data,
2079 if (network->ssid_len < IW_ESSID_MAX_SIZE)
2080 memset(network->ssid + network->ssid_len, 0,
2081 IW_ESSID_MAX_SIZE - network->ssid_len);
2083 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n",
2084 network->ssid, network->ssid_len);
2087 case MFIE_TYPE_RATES:
2089 network->rates_len = min(info_element->len,
2091 for (i = 0; i < network->rates_len; i++) {
2092 network->rates[i] = info_element->data[i];
2093 p += snprintf(p, sizeof(rates_str) -
2094 (p - rates_str), "%02X ",
2096 if (rtllib_is_ofdm_rate
2097 (info_element->data[i])) {
2098 network->flags |= NETWORK_HAS_OFDM;
2099 if (info_element->data[i] &
2100 RTLLIB_BASIC_RATE_MASK)
2105 if (rtllib_is_cck_rate
2106 (info_element->data[i])) {
2107 network->flags |= NETWORK_HAS_CCK;
2111 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n",
2112 rates_str, network->rates_len);
2115 case MFIE_TYPE_RATES_EX:
2117 network->rates_ex_len = min(info_element->len,
2118 MAX_RATES_EX_LENGTH);
2119 for (i = 0; i < network->rates_ex_len; i++) {
2120 network->rates_ex[i] = info_element->data[i];
2121 p += snprintf(p, sizeof(rates_str) -
2122 (p - rates_str), "%02X ",
2123 network->rates_ex[i]);
2124 if (rtllib_is_ofdm_rate
2125 (info_element->data[i])) {
2126 network->flags |= NETWORK_HAS_OFDM;
2127 if (info_element->data[i] &
2128 RTLLIB_BASIC_RATE_MASK)
2134 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n",
2135 rates_str, network->rates_ex_len);
2138 case MFIE_TYPE_DS_SET:
2139 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n",
2140 info_element->data[0]);
2141 network->channel = info_element->data[0];
2144 case MFIE_TYPE_FH_SET:
2145 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n");
2148 case MFIE_TYPE_CF_SET:
2149 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n");
2153 if (info_element->len < 4)
2156 network->tim.tim_count = info_element->data[0];
2157 network->tim.tim_period = info_element->data[1];
2159 network->dtim_period = info_element->data[1];
2160 if (ieee->state != RTLLIB_LINKED)
2162 network->last_dtim_sta_time = jiffies;
2164 network->dtim_data = RTLLIB_DTIM_VALID;
2167 if (info_element->data[2] & 1)
2168 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2170 offset = (info_element->data[2] >> 1)*2;
2173 if (ieee->assoc_id < 8*offset ||
2174 ieee->assoc_id > 8*(offset + info_element->len - 3))
2177 offset = (ieee->assoc_id / 8) - offset;
2178 if (info_element->data[3 + offset] &
2179 (1 << (ieee->assoc_id % 8)))
2180 network->dtim_data |= RTLLIB_DTIM_UCAST;
2182 network->listen_interval = network->dtim_period;
2186 network->erp_value = info_element->data[0];
2187 network->flags |= NETWORK_HAS_ERP_VALUE;
2188 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n",
2189 network->erp_value);
2191 case MFIE_TYPE_IBSS_SET:
2192 network->atim_window = info_element->data[0];
2193 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n",
2194 network->atim_window);
2197 case MFIE_TYPE_CHALLENGE:
2198 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n");
2201 case MFIE_TYPE_GENERIC:
2202 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n",
2205 rtllib_parse_mife_generic(ieee, info_element, network,
2211 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n",
2213 network->rsn_ie_len = min(info_element->len + 2,
2215 memcpy(network->rsn_ie, info_element,
2216 network->rsn_ie_len);
2219 case MFIE_TYPE_HT_CAP:
2220 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n",
2223 rtllib_parse_mfie_ht_cap(info_element, network,
2228 case MFIE_TYPE_HT_INFO:
2229 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n",
2231 tmp_htinfo_len = min_t(u8, info_element->len,
2233 if (tmp_htinfo_len) {
2234 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2235 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2236 sizeof(network->bssht.bdHTInfoBuf) ?
2237 sizeof(network->bssht.bdHTInfoBuf) :
2239 memcpy(network->bssht.bdHTInfoBuf,
2241 network->bssht.bdHTInfoLen);
2245 case MFIE_TYPE_AIRONET:
2246 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n",
2248 if (info_element->len > IE_CISCO_FLAG_POSITION) {
2249 network->bWithAironetIE = true;
2251 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2252 & SUPPORT_CKIP_MIC) ||
2253 (info_element->data[IE_CISCO_FLAG_POSITION]
2255 network->bCkipSupported = true;
2257 network->bCkipSupported = false;
2259 network->bWithAironetIE = false;
2260 network->bCkipSupported = false;
2263 case MFIE_TYPE_QOS_PARAMETER:
2264 netdev_err(ieee->dev,
2265 "QoS Error need to parse QOS_PARAMETER IE\n");
2268 case MFIE_TYPE_COUNTRY:
2269 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n",
2271 rtllib_extract_country_ie(ieee, info_element, network,
2276 netdev_dbg(ieee->dev,
2277 "Unsupported info element: %s (%d)\n",
2278 get_info_element_string(info_element->id),
2283 length -= sizeof(*info_element) + info_element->len;
2285 (struct rtllib_info_element *)&info_element->
2286 data[info_element->len];
2289 if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2290 !network->cisco_cap_exist && !network->ralink_cap_exist &&
2291 !network->bssht.bdRT2RTAggregation)
2292 network->unknown_cap_exist = true;
2294 network->unknown_cap_exist = false;
2298 static long rtllib_translate_todbm(u8 signal_strength_index)
2302 signal_power = (long)((signal_strength_index + 1) >> 1);
2305 return signal_power;
2308 static inline int rtllib_network_init(
2309 struct rtllib_device *ieee,
2310 struct rtllib_probe_response *beacon,
2311 struct rtllib_network *network,
2312 struct rtllib_rx_stats *stats)
2314 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2316 /* Pull out fixed field data */
2317 ether_addr_copy(network->bssid, beacon->header.addr3);
2318 network->capability = le16_to_cpu(beacon->capability);
2319 network->last_scanned = jiffies;
2320 network->time_stamp[0] = beacon->time_stamp[0];
2321 network->time_stamp[1] = beacon->time_stamp[1];
2322 network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2323 /* Where to pull this? beacon->listen_interval;*/
2324 network->listen_interval = 0x0A;
2325 network->rates_len = network->rates_ex_len = 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->wmm_info = src->wmm_info;
2504 if (src->wmm_param[0].ac_aci_acm_aifsn ||
2505 src->wmm_param[1].ac_aci_acm_aifsn ||
2506 src->wmm_param[2].ac_aci_acm_aifsn ||
2507 src->wmm_param[3].ac_aci_acm_aifsn)
2508 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2510 dst->SignalStrength = src->SignalStrength;
2511 dst->RSSI = src->RSSI;
2512 dst->Turbo_Enable = src->Turbo_Enable;
2514 dst->CountryIeLen = src->CountryIeLen;
2515 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2517 dst->bWithAironetIE = src->bWithAironetIE;
2518 dst->bCkipSupported = src->bCkipSupported;
2519 memcpy(dst->CcxRmState, src->CcxRmState, 2);
2520 dst->bCcxRmEnable = src->bCcxRmEnable;
2521 dst->MBssidMask = src->MBssidMask;
2522 dst->bMBssidValid = src->bMBssidValid;
2523 memcpy(dst->MBssid, src->MBssid, 6);
2524 dst->bWithCcxVerNum = src->bWithCcxVerNum;
2525 dst->BssCcxVerNumber = src->BssCcxVerNumber;
2528 static inline int is_beacon(u16 fc)
2530 return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON);
2533 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2535 if (MAX_CHANNEL_NUMBER < channel) {
2536 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2540 if (rtllib->active_channel_map[channel] == 2)
2546 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2548 if (MAX_CHANNEL_NUMBER < channel) {
2549 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2552 if (rtllib->active_channel_map[channel] > 0)
2557 EXPORT_SYMBOL(rtllib_legal_channel);
2559 static inline void rtllib_process_probe_response(
2560 struct rtllib_device *ieee,
2561 struct rtllib_probe_response *beacon,
2562 struct rtllib_rx_stats *stats)
2564 struct rtllib_network *target;
2565 struct rtllib_network *oldest = NULL;
2566 struct rtllib_info_element *info_element = &beacon->info_element[0];
2567 unsigned long flags;
2569 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2571 u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl);
2576 netdev_dbg(ieee->dev,
2577 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2578 escape_essid(info_element->data, info_element->len),
2579 beacon->header.addr3,
2580 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2581 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2582 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2583 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2584 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2585 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2586 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2587 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2588 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2589 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2590 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2591 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2592 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2593 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2594 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2595 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2597 if (rtllib_network_init(ieee, beacon, network, stats)) {
2598 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n",
2599 escape_essid(info_element->data, info_element->len),
2600 beacon->header.addr3,
2601 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2606 if (!rtllib_legal_channel(ieee, network->channel))
2609 if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2610 if (IsPassiveChannel(ieee, network->channel)) {
2611 netdev_info(ieee->dev,
2612 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2618 /* The network parsed correctly -- so now we scan our known networks
2619 * to see if we can find it in our list.
2621 * NOTE: This search is definitely not optimized. Once its doing
2622 * the "right thing" we'll optimize it for efficiency if
2626 /* Search for this entry in the list and update it if it is
2630 spin_lock_irqsave(&ieee->lock, flags);
2631 if (is_same_network(&ieee->current_network, network,
2632 (network->ssid_len ? 1 : 0))) {
2633 update_network(ieee, &ieee->current_network, network);
2634 if ((ieee->current_network.mode == IEEE_N_24G ||
2635 ieee->current_network.mode == IEEE_G)
2636 && ieee->current_network.berp_info_valid) {
2637 if (ieee->current_network.erp_value & ERP_UseProtection)
2638 ieee->current_network.buseprotection = true;
2640 ieee->current_network.buseprotection = false;
2642 if (is_beacon(frame_ctl)) {
2643 if (ieee->state >= RTLLIB_LINKED)
2644 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2647 list_for_each_entry(target, &ieee->network_list, list) {
2648 if (is_same_network(target, network,
2649 (target->ssid_len ? 1 : 0)))
2651 if ((oldest == NULL) ||
2652 (target->last_scanned < oldest->last_scanned))
2656 /* If we didn't find a match, then get a new network slot to initialize
2657 * with this beacon's information
2659 if (&target->list == &ieee->network_list) {
2660 if (list_empty(&ieee->network_free_list)) {
2661 /* If there are no more slots, expire the oldest */
2662 list_del(&oldest->list);
2664 netdev_dbg(ieee->dev,
2665 "Expired '%s' ( %pM) from network list.\n",
2666 escape_essid(target->ssid, target->ssid_len),
2669 /* Otherwise just pull from the free list */
2670 target = list_entry(ieee->network_free_list.next,
2671 struct rtllib_network, list);
2672 list_del(ieee->network_free_list.next);
2675 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n",
2676 escape_essid(network->ssid, network->ssid_len),
2678 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2680 memcpy(target, network, sizeof(*target));
2681 list_add_tail(&target->list, &ieee->network_list);
2682 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2683 rtllib_softmac_new_net(ieee, network);
2685 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n",
2686 escape_essid(target->ssid, target->ssid_len),
2688 is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2690 /* we have an entry and we are going to update it. But this
2691 * entry may be already expired. In this case we do the same
2692 * as we found a new net and call the new_net handler
2694 renew = !time_after(target->last_scanned + ieee->scan_age,
2696 if ((!target->ssid_len) &&
2697 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2698 || ((ieee->current_network.ssid_len == network->ssid_len) &&
2699 (strncmp(ieee->current_network.ssid, network->ssid,
2700 network->ssid_len) == 0) &&
2701 (ieee->state == RTLLIB_NOLINK))))
2703 update_network(ieee, target, network);
2704 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2705 rtllib_softmac_new_net(ieee, network);
2708 spin_unlock_irqrestore(&ieee->lock, flags);
2709 if (is_beacon(frame_ctl) &&
2710 is_same_network(&ieee->current_network, network,
2711 (network->ssid_len ? 1 : 0)) &&
2712 (ieee->state == RTLLIB_LINKED)) {
2713 if (ieee->handle_beacon != NULL)
2714 ieee->handle_beacon(ieee->dev, beacon,
2715 &ieee->current_network);
2721 static void rtllib_rx_mgt(struct rtllib_device *ieee,
2722 struct sk_buff *skb,
2723 struct rtllib_rx_stats *stats)
2725 struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2727 if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2728 RTLLIB_STYPE_PROBE_RESP) &&
2729 (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2730 RTLLIB_STYPE_BEACON))
2731 ieee->last_rx_ps_time = jiffies;
2733 switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2735 case RTLLIB_STYPE_BEACON:
2736 netdev_dbg(ieee->dev, "received BEACON (%d)\n",
2737 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2738 rtllib_process_probe_response(
2739 ieee, (struct rtllib_probe_response *)header,
2742 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2743 ieee->iw_mode == IW_MODE_INFRA &&
2744 ieee->state == RTLLIB_LINKED))
2745 tasklet_schedule(&ieee->ps_task);
2749 case RTLLIB_STYPE_PROBE_RESP:
2750 netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n",
2751 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2752 rtllib_process_probe_response(ieee,
2753 (struct rtllib_probe_response *)header, stats);
2755 case RTLLIB_STYPE_PROBE_REQ:
2756 netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n",
2757 WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2758 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2759 ((ieee->iw_mode == IW_MODE_ADHOC ||
2760 ieee->iw_mode == IW_MODE_MASTER) &&
2761 ieee->state == RTLLIB_LINKED))
2762 rtllib_rx_probe_rq(ieee, skb);