--- /dev/null
+/*
+ * Original code based Host AP (software wireless LAN access point) driver
+ * for Intersil Prism2/2.5/3 - hostap.o module, common routines
+ *
+ * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
+ * <jkmaline@cc.hut.fi>
+ * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
+ * Copyright (c) 2004, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. See README and COPYING for
+ * more details.
+ ******************************************************************************
+
+ Few modifications for Realtek's Wi-Fi drivers by
+ Andrea Merello <andrea.merello@gmail.com>
+
+ A special thanks goes to Realtek for their support !
+
+******************************************************************************/
+
+
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/in6.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/wireless.h>
+#include <linux/etherdevice.h>
+#include <linux/uaccess.h>
+#include <linux/ctype.h>
+
+#include "rtllib.h"
+#include "dot11d.h"
+
+static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
+ struct sk_buff *skb, struct rtllib_rx_stats *rx_status,
+ size_t hdr_length)
+{
+ skb->dev = ieee->dev;
+ skb_reset_mac_header(skb);
+ skb_pull(skb, hdr_length);
+ skb->pkt_type = PACKET_OTHERHOST;
+ skb->protocol = htons(ETH_P_80211_RAW);
+ memset(skb->cb, 0, sizeof(skb->cb));
+ netif_rx(skb);
+}
+
+/* Called only as a tasklet (software IRQ) */
+static struct rtllib_frag_entry *
+rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
+ unsigned int frag, u8 tid, u8 *src, u8 *dst)
+{
+ struct rtllib_frag_entry *entry;
+ int i;
+
+ for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
+ entry = &ieee->frag_cache[tid][i];
+ if (entry->skb != NULL &&
+ time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
+ RTLLIB_DEBUG_FRAG(
+ "expiring fragment cache entry seq=%u last_frag=%u\n",
+ entry->seq, entry->last_frag);
+ dev_kfree_skb_any(entry->skb);
+ entry->skb = NULL;
+ }
+
+ if (entry->skb != NULL && entry->seq == seq &&
+ (entry->last_frag + 1 == frag || frag == -1) &&
+ memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
+ memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
+ return entry;
+ }
+
+ return NULL;
+}
+
+/* Called only as a tasklet (software IRQ) */
+static struct sk_buff *
+rtllib_frag_cache_get(struct rtllib_device *ieee,
+ struct rtllib_hdr_4addr *hdr)
+{
+ struct sk_buff *skb = NULL;
+ u16 fc = le16_to_cpu(hdr->frame_ctl);
+ u16 sc = le16_to_cpu(hdr->seq_ctl);
+ unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
+ unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
+ struct rtllib_frag_entry *entry;
+ struct rtllib_hdr_3addrqos *hdr_3addrqos;
+ struct rtllib_hdr_4addrqos *hdr_4addrqos;
+ u8 tid;
+
+ if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
+ hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
+ tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
+ tid = UP2AC(tid);
+ tid++;
+ } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
+ hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
+ tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
+ tid = UP2AC(tid);
+ tid++;
+ } else {
+ tid = 0;
+ }
+
+ if (frag == 0) {
+ /* Reserve enough space to fit maximum frame length */
+ skb = dev_alloc_skb(ieee->dev->mtu +
+ sizeof(struct rtllib_hdr_4addr) +
+ 8 /* LLC */ +
+ 2 /* alignment */ +
+ 8 /* WEP */ +
+ ETH_ALEN /* WDS */ +
+ (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
+ if (skb == NULL)
+ return NULL;
+
+ entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
+ ieee->frag_next_idx[tid]++;
+ if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
+ ieee->frag_next_idx[tid] = 0;
+
+ if (entry->skb != NULL)
+ dev_kfree_skb_any(entry->skb);
+
+ entry->first_frag_time = jiffies;
+ entry->seq = seq;
+ entry->last_frag = frag;
+ entry->skb = skb;
+ memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
+ memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
+ } else {
+ /* received a fragment of a frame for which the head fragment
+ * should have already been received
+ */
+ entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
+ hdr->addr1);
+ if (entry != NULL) {
+ entry->last_frag = frag;
+ skb = entry->skb;
+ }
+ }
+
+ return skb;
+}
+
+
+/* Called only as a tasklet (software IRQ) */
+static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
+ struct rtllib_hdr_4addr *hdr)
+{
+ u16 fc = le16_to_cpu(hdr->frame_ctl);
+ u16 sc = le16_to_cpu(hdr->seq_ctl);
+ unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
+ struct rtllib_frag_entry *entry;
+ struct rtllib_hdr_3addrqos *hdr_3addrqos;
+ struct rtllib_hdr_4addrqos *hdr_4addrqos;
+ u8 tid;
+
+ if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
+ hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
+ tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
+ tid = UP2AC(tid);
+ tid++;
+ } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
+ hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
+ tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
+ tid = UP2AC(tid);
+ tid++;
+ } else {
+ tid = 0;
+ }
+
+ entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
+ hdr->addr1);
+
+ if (entry == NULL) {
+ RTLLIB_DEBUG_FRAG(
+ "could not invalidate fragment cache entry (seq=%u)\n", seq);
+ return -1;
+ }
+
+ entry->skb = NULL;
+ return 0;
+}
+
+/* rtllib_rx_frame_mgtmt
+ *
+ * Responsible for handling management control frames
+ *
+ * Called by rtllib_rx
+ */
+static inline int
+rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats, u16 type,
+ u16 stype)
+{
+ /* On the struct stats definition there is written that
+ * this is not mandatory.... but seems that the probe
+ * response parser uses it
+ */
+ struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
+
+ rx_stats->len = skb->len;
+ rtllib_rx_mgt(ieee, skb, rx_stats);
+ if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+ rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
+
+ dev_kfree_skb_any(skb);
+
+ return 0;
+}
+
+/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation
+ * Ethernet-II snap header (RFC1042 for most EtherTypes)
+ */
+static unsigned char rfc1042_header[] = {
+ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
+};
+/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
+static unsigned char bridge_tunnel_header[] = {
+ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
+};
+/* No encapsulation header if EtherType < 0x600 (=length) */
+
+/* Called by rtllib_rx_frame_decrypt */
+static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
+ struct sk_buff *skb, size_t hdrlen)
+{
+ struct net_device *dev = ieee->dev;
+ u16 fc, ethertype;
+ struct rtllib_hdr_4addr *hdr;
+ u8 *pos;
+
+ if (skb->len < 24)
+ return 0;
+
+ hdr = (struct rtllib_hdr_4addr *) skb->data;
+ fc = le16_to_cpu(hdr->frame_ctl);
+
+ /* check that the frame is unicast frame to us */
+ if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
+ RTLLIB_FCTL_TODS &&
+ memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
+ memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
+ /* ToDS frame with own addr BSSID and DA */
+ } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
+ RTLLIB_FCTL_FROMDS &&
+ memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
+ /* FromDS frame with own addr as DA */
+ } else
+ return 0;
+
+ if (skb->len < 24 + 8)
+ return 0;
+
+ /* check for port access entity Ethernet type */
+ pos = skb->data + hdrlen;
+ ethertype = (pos[6] << 8) | pos[7];
+ if (ethertype == ETH_P_PAE)
+ return 1;
+
+ return 0;
+}
+
+/* Called only as a tasklet (software IRQ), by rtllib_rx */
+static inline int
+rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct lib80211_crypt_data *crypt)
+{
+ struct rtllib_hdr_4addr *hdr;
+ int res, hdrlen;
+
+ if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
+ return 0;
+
+ if (ieee->hwsec_active) {
+ struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
+
+ tcb_desc->bHwSec = 1;
+
+ if (ieee->need_sw_enc)
+ tcb_desc->bHwSec = 0;
+ }
+
+ hdr = (struct rtllib_hdr_4addr *) skb->data;
+ hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
+
+ atomic_inc(&crypt->refcnt);
+ res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
+ atomic_dec(&crypt->refcnt);
+ if (res < 0) {
+ RTLLIB_DEBUG_DROP(
+ "decryption failed (SA= %pM) res=%d\n", hdr->addr2, res);
+ if (res == -2)
+ RTLLIB_DEBUG_DROP("Decryption failed ICV mismatch (key %d)\n",
+ skb->data[hdrlen + 3] >> 6);
+ ieee->ieee_stats.rx_discards_undecryptable++;
+ return -1;
+ }
+
+ return res;
+}
+
+
+/* Called only as a tasklet (software IRQ), by rtllib_rx */
+static inline int
+rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
+ int keyidx, struct lib80211_crypt_data *crypt)
+{
+ struct rtllib_hdr_4addr *hdr;
+ int res, hdrlen;
+
+ if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
+ return 0;
+ if (ieee->hwsec_active) {
+ struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
+
+ tcb_desc->bHwSec = 1;
+
+ if (ieee->need_sw_enc)
+ tcb_desc->bHwSec = 0;
+ }
+
+ hdr = (struct rtllib_hdr_4addr *) skb->data;
+ hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
+
+ atomic_inc(&crypt->refcnt);
+ res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
+ atomic_dec(&crypt->refcnt);
+ if (res < 0) {
+ printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
+ ieee->dev->name, hdr->addr2, keyidx);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+/* this function is stolen from ipw2200 driver*/
+#define IEEE_PACKET_RETRY_TIME (5*HZ)
+static int is_duplicate_packet(struct rtllib_device *ieee,
+ struct rtllib_hdr_4addr *header)
+{
+ u16 fc = le16_to_cpu(header->frame_ctl);
+ u16 sc = le16_to_cpu(header->seq_ctl);
+ u16 seq = WLAN_GET_SEQ_SEQ(sc);
+ u16 frag = WLAN_GET_SEQ_FRAG(sc);
+ u16 *last_seq, *last_frag;
+ unsigned long *last_time;
+ struct rtllib_hdr_3addrqos *hdr_3addrqos;
+ struct rtllib_hdr_4addrqos *hdr_4addrqos;
+ u8 tid;
+
+ if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
+ hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
+ tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
+ tid = UP2AC(tid);
+ tid++;
+ } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
+ hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
+ tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
+ tid = UP2AC(tid);
+ tid++;
+ } else {
+ tid = 0;
+ }
+
+ switch (ieee->iw_mode) {
+ case IW_MODE_ADHOC:
+ {
+ struct list_head *p;
+ struct ieee_ibss_seq *entry = NULL;
+ u8 *mac = header->addr2;
+ int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
+
+ list_for_each(p, &ieee->ibss_mac_hash[index]) {
+ entry = list_entry(p, struct ieee_ibss_seq, list);
+ if (!memcmp(entry->mac, mac, ETH_ALEN))
+ break;
+ }
+ if (p == &ieee->ibss_mac_hash[index]) {
+ entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
+ if (!entry)
+ return 0;
+
+ memcpy(entry->mac, mac, ETH_ALEN);
+ entry->seq_num[tid] = seq;
+ entry->frag_num[tid] = frag;
+ entry->packet_time[tid] = jiffies;
+ list_add(&entry->list, &ieee->ibss_mac_hash[index]);
+ return 0;
+ }
+ last_seq = &entry->seq_num[tid];
+ last_frag = &entry->frag_num[tid];
+ last_time = &entry->packet_time[tid];
+ break;
+ }
+
+ case IW_MODE_INFRA:
+ last_seq = &ieee->last_rxseq_num[tid];
+ last_frag = &ieee->last_rxfrag_num[tid];
+ last_time = &ieee->last_packet_time[tid];
+ break;
+ default:
+ return 0;
+ }
+
+ if ((*last_seq == seq) &&
+ time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
+ if (*last_frag == frag)
+ goto drop;
+ if (*last_frag + 1 != frag)
+ /* out-of-order fragment */
+ goto drop;
+ } else
+ *last_seq = seq;
+
+ *last_frag = frag;
+ *last_time = jiffies;
+ return 0;
+
+drop:
+
+ return 1;
+}
+
+static bool AddReorderEntry(struct rx_ts_record *pTS,
+ struct rx_reorder_entry *pReorderEntry)
+{
+ struct list_head *pList = &pTS->RxPendingPktList;
+
+ while (pList->next != &pTS->RxPendingPktList) {
+ if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
+ list_entry(pList->next, struct rx_reorder_entry,
+ List))->SeqNum))
+ pList = pList->next;
+ else if (SN_EQUAL(pReorderEntry->SeqNum,
+ ((struct rx_reorder_entry *)list_entry(pList->next,
+ struct rx_reorder_entry, List))->SeqNum))
+ return false;
+ else
+ break;
+ }
+ pReorderEntry->List.next = pList->next;
+ pReorderEntry->List.next->prev = &pReorderEntry->List;
+ pReorderEntry->List.prev = pList;
+ pList->next = &pReorderEntry->List;
+
+ return true;
+}
+
+void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
+{
+ struct net_device_stats *stats = &ieee->stats;
+ u8 i = 0 , j = 0;
+ u16 ethertype;
+
+ for (j = 0; j < index; j++) {
+ struct rtllib_rxb *prxb = prxbIndicateArray[j];
+
+ for (i = 0; i < prxb->nr_subframes; i++) {
+ struct sk_buff *sub_skb = prxb->subframes[i];
+
+ /* convert hdr + possible LLC headers into Ethernet header */
+ ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
+ if (sub_skb->len >= 8 &&
+ ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
+ ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
+ memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
+ /* remove RFC1042 or Bridge-Tunnel encapsulation
+ * and replace EtherType
+ */
+ skb_pull(sub_skb, SNAP_SIZE);
+ memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
+ memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
+ } else {
+ u16 len;
+ /* Leave Ethernet header part of hdr and full payload */
+ len = sub_skb->len;
+ memcpy(skb_push(sub_skb, 2), &len, 2);
+ memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
+ memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
+ }
+
+ /* Indicate the packets to upper layer */
+ if (sub_skb) {
+ stats->rx_packets++;
+ stats->rx_bytes += sub_skb->len;
+
+ memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
+ sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
+ sub_skb->dev = ieee->dev;
+ sub_skb->dev->stats.rx_packets++;
+ sub_skb->dev->stats.rx_bytes += sub_skb->len;
+ sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
+ ieee->last_rx_ps_time = jiffies;
+ netif_rx(sub_skb);
+ }
+ }
+ kfree(prxb);
+ prxb = NULL;
+ }
+}
+
+void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, struct rx_ts_record *pTS)
+{
+ struct rx_reorder_entry *pRxReorderEntry;
+ u8 RfdCnt = 0;
+
+ del_timer_sync(&pTS->RxPktPendingTimer);
+ while (!list_empty(&pTS->RxPendingPktList)) {
+ if (RfdCnt >= REORDER_WIN_SIZE) {
+ netdev_info(ieee->dev,
+ "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
+ __func__);
+ break;
+ }
+
+ pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev, struct rx_reorder_entry, List);
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pRxReorderEntry->SeqNum);
+ list_del_init(&pRxReorderEntry->List);
+
+ ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
+
+ RfdCnt = RfdCnt + 1;
+ list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
+ }
+ rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
+
+ pTS->RxIndicateSeq = 0xffff;
+}
+
+static void RxReorderIndicatePacket(struct rtllib_device *ieee,
+ struct rtllib_rxb *prxb,
+ struct rx_ts_record *pTS, u16 SeqNum)
+{
+ struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
+ struct rx_reorder_entry *pReorderEntry = NULL;
+ u8 WinSize = pHTInfo->RxReorderWinSize;
+ u16 WinEnd = 0;
+ u8 index = 0;
+ bool bMatchWinStart = false, bPktInBuf = false;
+ unsigned long flags;
+
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n", __func__, SeqNum,
+ pTS->RxIndicateSeq, WinSize);
+
+ spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
+
+ WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
+ /* Rx Reorder initialize condition.*/
+ if (pTS->RxIndicateSeq == 0xffff)
+ pTS->RxIndicateSeq = SeqNum;
+
+ /* Drop out the packet which SeqNum is smaller than WinStart */
+ if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
+ pTS->RxIndicateSeq, SeqNum);
+ pHTInfo->RxReorderDropCounter++;
+ {
+ int i;
+
+ for (i = 0; i < prxb->nr_subframes; i++)
+ dev_kfree_skb(prxb->subframes[i]);
+ kfree(prxb);
+ prxb = NULL;
+ }
+ spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
+ return;
+ }
+
+ /* Sliding window manipulation. Conditions includes:
+ * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
+ * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
+ */
+ if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
+ pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
+ bMatchWinStart = true;
+ } else if (SN_LESS(WinEnd, SeqNum)) {
+ if (SeqNum >= (WinSize - 1))
+ pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
+ else
+ pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum + 1)) + 1;
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
+ }
+
+ /* Indication process.
+ * After Packet dropping and Sliding Window shifting as above, we can
+ * now just indicate the packets with the SeqNum smaller than latest
+ * WinStart and struct buffer other packets.
+ *
+ * For Rx Reorder condition:
+ * 1. All packets with SeqNum smaller than WinStart => Indicate
+ * 2. All packets with SeqNum larger than or equal to
+ * WinStart => Buffer it.
+ */
+ if (bMatchWinStart) {
+ /* Current packet is going to be indicated.*/
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",
+ pTS->RxIndicateSeq, SeqNum);
+ ieee->prxbIndicateArray[0] = prxb;
+ index = 1;
+ } else {
+ /* Current packet is going to be inserted into pending list.*/
+ if (!list_empty(&ieee->RxReorder_Unused_List)) {
+ pReorderEntry = (struct rx_reorder_entry *)
+ list_entry(ieee->RxReorder_Unused_List.next,
+ struct rx_reorder_entry, List);
+ list_del_init(&pReorderEntry->List);
+
+ /* Make a reorder entry and insert into a the packet list.*/
+ pReorderEntry->SeqNum = SeqNum;
+ pReorderEntry->prxb = prxb;
+
+ if (!AddReorderEntry(pTS, pReorderEntry)) {
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER,
+ "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
+ __func__, pTS->RxIndicateSeq,
+ SeqNum);
+ list_add_tail(&pReorderEntry->List,
+ &ieee->RxReorder_Unused_List); {
+ int i;
+
+ for (i = 0; i < prxb->nr_subframes; i++)
+ dev_kfree_skb(prxb->subframes[i]);
+ kfree(prxb);
+ prxb = NULL;
+ }
+ } else {
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER,
+ "Pkt insert into struct buffer!! IndicateSeq: %d, NewSeq: %d\n",
+ pTS->RxIndicateSeq, SeqNum);
+ }
+ } else {
+ /* Packets are dropped if there are not enough reorder
+ * entries. This part should be modified!! We can just
+ * indicate all the packets in struct buffer and get
+ * reorder entries.
+ */
+ RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
+ {
+ int i;
+
+ for (i = 0; i < prxb->nr_subframes; i++)
+ dev_kfree_skb(prxb->subframes[i]);
+ kfree(prxb);
+ prxb = NULL;
+ }
+ }
+ }
+
+ /* Check if there is any packet need indicate.*/
+ while (!list_empty(&pTS->RxPendingPktList)) {
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
+
+ pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
+ struct rx_reorder_entry, List);
+ if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
+ SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
+ /* This protect struct buffer from overflow. */
+ if (index >= REORDER_WIN_SIZE) {
+ RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!!\n");
+ bPktInBuf = true;
+ break;
+ }
+
+ list_del_init(&pReorderEntry->List);
+
+ if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
+ pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
+
+ ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pReorderEntry->SeqNum);
+ index++;
+
+ list_add_tail(&pReorderEntry->List,
+ &ieee->RxReorder_Unused_List);
+ } else {
+ bPktInBuf = true;
+ break;
+ }
+ }
+
+ /* Handling pending timer. Set this timer to prevent from long time
+ * Rx buffering.
+ */
+ if (index > 0) {
+ if (timer_pending(&pTS->RxPktPendingTimer))
+ del_timer_sync(&pTS->RxPktPendingTimer);
+ pTS->RxTimeoutIndicateSeq = 0xffff;
+
+ if (index > REORDER_WIN_SIZE) {
+ RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder struct buffer full!!\n");
+ spin_unlock_irqrestore(&(ieee->reorder_spinlock),
+ flags);
+ return;
+ }
+ rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
+ bPktInBuf = false;
+ }
+
+ if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
+ RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): SET rx timeout timer\n",
+ __func__);
+ pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
+ mod_timer(&pTS->RxPktPendingTimer, jiffies +
+ msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
+ }
+ spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
+}
+
+static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats,
+ struct rtllib_rxb *rxb, u8 *src, u8 *dst)
+{
+ struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
+ u16 fc = le16_to_cpu(hdr->frame_ctl);
+
+ u16 LLCOffset = sizeof(struct rtllib_hdr_3addr);
+ u16 ChkLength;
+ bool bIsAggregateFrame = false;
+ u16 nSubframe_Length;
+ u8 nPadding_Length = 0;
+ u16 SeqNum = 0;
+ struct sk_buff *sub_skb;
+ u8 *data_ptr;
+ /* just for debug purpose */
+ SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
+ if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
+ (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
+ bIsAggregateFrame = true;
+
+ if (RTLLIB_QOS_HAS_SEQ(fc))
+ LLCOffset += 2;
+ if (rx_stats->bContainHTC)
+ LLCOffset += sHTCLng;
+
+ ChkLength = LLCOffset;
+
+ if (skb->len <= ChkLength)
+ return 0;
+
+ skb_pull(skb, LLCOffset);
+ ieee->bIsAggregateFrame = bIsAggregateFrame;
+ if (!bIsAggregateFrame) {
+ rxb->nr_subframes = 1;
+
+ /* altered by clark 3/30/2010
+ * The struct buffer size of the skb indicated to upper layer
+ * must be less than 5000, or the defraged IP datagram
+ * in the IP layer will exceed "ipfrag_high_tresh" and be
+ * discarded. so there must not use the function
+ * "skb_copy" and "skb_clone" for "skb".
+ */
+
+ /* Allocate new skb for releasing to upper layer */
+ sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
+ if (!sub_skb)
+ return 0;
+ skb_reserve(sub_skb, 12);
+ data_ptr = (u8 *)skb_put(sub_skb, skb->len);
+ memcpy(data_ptr, skb->data, skb->len);
+ sub_skb->dev = ieee->dev;
+
+ rxb->subframes[0] = sub_skb;
+
+ memcpy(rxb->src, src, ETH_ALEN);
+ memcpy(rxb->dst, dst, ETH_ALEN);
+ rxb->subframes[0]->dev = ieee->dev;
+ return 1;
+ }
+
+ rxb->nr_subframes = 0;
+ memcpy(rxb->src, src, ETH_ALEN);
+ memcpy(rxb->dst, dst, ETH_ALEN);
+ while (skb->len > ETHERNET_HEADER_SIZE) {
+ /* Offset 12 denote 2 mac address */
+ nSubframe_Length = *((u16 *)(skb->data + 12));
+ nSubframe_Length = (nSubframe_Length >> 8) +
+ (nSubframe_Length << 8);
+
+ if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
+ netdev_info(ieee->dev,
+ "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
+ __func__, rxb->nr_subframes);
+ netdev_info(ieee->dev,
+ "%s: A-MSDU parse error!! Subframe Length: %d\n",
+ __func__, nSubframe_Length);
+ netdev_info(ieee->dev,
+ "nRemain_Length is %d and nSubframe_Length is : %d\n",
+ skb->len, nSubframe_Length);
+ netdev_info(ieee->dev,
+ "The Packet SeqNum is %d\n",
+ SeqNum);
+ return 0;
+ }
+
+ /* move the data point to data content */
+ skb_pull(skb, ETHERNET_HEADER_SIZE);
+
+ /* altered by clark 3/30/2010
+ * The struct buffer size of the skb indicated to upper layer
+ * must be less than 5000, or the defraged IP datagram
+ * in the IP layer will exceed "ipfrag_high_tresh" and be
+ * discarded. so there must not use the function
+ * "skb_copy" and "skb_clone" for "skb".
+ */
+
+ /* Allocate new skb for releasing to upper layer */
+ sub_skb = dev_alloc_skb(nSubframe_Length + 12);
+ if (!sub_skb)
+ return 0;
+ skb_reserve(sub_skb, 12);
+ data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
+ memcpy(data_ptr, skb->data, nSubframe_Length);
+
+ sub_skb->dev = ieee->dev;
+ rxb->subframes[rxb->nr_subframes++] = sub_skb;
+ if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
+ RTLLIB_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
+ break;
+ }
+ skb_pull(skb, nSubframe_Length);
+
+ if (skb->len != 0) {
+ nPadding_Length = 4 - ((nSubframe_Length +
+ ETHERNET_HEADER_SIZE) % 4);
+ if (nPadding_Length == 4)
+ nPadding_Length = 0;
+
+ if (skb->len < nPadding_Length)
+ return 0;
+
+ skb_pull(skb, nPadding_Length);
+ }
+ }
+
+ return rxb->nr_subframes;
+}
+
+
+static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
+ struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats)
+{
+ struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
+ u16 fc = le16_to_cpu(hdr->frame_ctl);
+ size_t hdrlen = 0;
+
+ hdrlen = rtllib_get_hdrlen(fc);
+ if (HTCCheck(ieee, skb->data)) {
+ if (net_ratelimit())
+ netdev_info(ieee->dev, "%s: find HTCControl!\n",
+ __func__);
+ hdrlen += 4;
+ rx_stats->bContainHTC = true;
+ }
+
+ if (RTLLIB_QOS_HAS_SEQ(fc))
+ rx_stats->bIsQosData = true;
+
+ return hdrlen;
+}
+
+static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
+ struct sk_buff *skb, u8 multicast)
+{
+ struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
+ u16 fc, sc;
+ u8 frag, type, stype;
+
+ fc = le16_to_cpu(hdr->frame_ctl);
+ type = WLAN_FC_GET_TYPE(fc);
+ stype = WLAN_FC_GET_STYPE(fc);
+ sc = le16_to_cpu(hdr->seq_ctl);
+ frag = WLAN_GET_SEQ_FRAG(sc);
+
+ if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
+ !ieee->current_network.qos_data.active ||
+ !IsDataFrame(skb->data) ||
+ IsLegacyDataFrame(skb->data)) {
+ if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
+ if (is_duplicate_packet(ieee, hdr))
+ return -1;
+ }
+ } else {
+ struct rx_ts_record *pRxTS = NULL;
+
+ if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
+ (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
+ if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
+ (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
+ return -1;
+ pRxTS->RxLastFragNum = frag;
+ pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
+ } else {
+ RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n", __func__);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
+ struct rtllib_hdr_4addr *hdr, u8 *dst,
+ u8 *src, u8 *bssid)
+{
+ u16 fc = le16_to_cpu(hdr->frame_ctl);
+
+ switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
+ case RTLLIB_FCTL_FROMDS:
+ memcpy(dst, hdr->addr1, ETH_ALEN);
+ memcpy(src, hdr->addr3, ETH_ALEN);
+ memcpy(bssid, hdr->addr2, ETH_ALEN);
+ break;
+ case RTLLIB_FCTL_TODS:
+ memcpy(dst, hdr->addr3, ETH_ALEN);
+ memcpy(src, hdr->addr2, ETH_ALEN);
+ memcpy(bssid, hdr->addr1, ETH_ALEN);
+ break;
+ case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
+ memcpy(dst, hdr->addr3, ETH_ALEN);
+ memcpy(src, hdr->addr4, ETH_ALEN);
+ memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
+ break;
+ case 0:
+ memcpy(dst, hdr->addr1, ETH_ALEN);
+ memcpy(src, hdr->addr2, ETH_ALEN);
+ memcpy(bssid, hdr->addr3, ETH_ALEN);
+ break;
+ }
+}
+
+static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
+ u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
+{
+ u8 type, stype;
+
+ type = WLAN_FC_GET_TYPE(fc);
+ stype = WLAN_FC_GET_STYPE(fc);
+
+ /* Filter frames from different BSS */
+ if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
+ !ether_addr_equal(ieee->current_network.bssid, bssid) &&
+ !is_zero_ether_addr(ieee->current_network.bssid)) {
+ return -1;
+ }
+
+ /* Filter packets sent by an STA that will be forwarded by AP */
+ if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn &&
+ ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
+ if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
+ !ether_addr_equal(dst, ieee->current_network.bssid) &&
+ ether_addr_equal(bssid, ieee->current_network.bssid)) {
+ return -1;
+ }
+ }
+
+ /* Nullfunc frames may have PS-bit set, so they must be passed to
+ * hostap_handle_sta_rx() before being dropped here.
+ */
+ if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
+ if (stype != RTLLIB_STYPE_DATA &&
+ stype != RTLLIB_STYPE_DATA_CFACK &&
+ stype != RTLLIB_STYPE_DATA_CFPOLL &&
+ stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
+ stype != RTLLIB_STYPE_QOS_DATA) {
+ if (stype != RTLLIB_STYPE_NULLFUNC)
+ RTLLIB_DEBUG_DROP(
+ "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
+ type, stype);
+ return -1;
+ }
+ }
+
+ if (ieee->iw_mode != IW_MODE_MESH) {
+ /* packets from our adapter are dropped (echo) */
+ if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
+ return -1;
+
+ /* {broad,multi}cast packets to our BSS go through */
+ if (is_multicast_ether_addr(dst)) {
+ if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct lib80211_crypt_data **crypt, size_t hdrlen)
+{
+ struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
+ u16 fc = le16_to_cpu(hdr->frame_ctl);
+ int idx = 0;
+
+ if (ieee->host_decrypt) {
+ if (skb->len >= hdrlen + 3)
+ idx = skb->data[hdrlen + 3] >> 6;
+
+ *crypt = ieee->crypt_info.crypt[idx];
+ /* allow NULL decrypt to indicate an station specific override
+ * for default encryption
+ */
+ if (*crypt && ((*crypt)->ops == NULL ||
+ (*crypt)->ops->decrypt_mpdu == NULL))
+ *crypt = NULL;
+
+ if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
+ /* This seems to be triggered by some (multicast?)
+ * frames from other than current BSS, so just drop the
+ * frames silently instead of filling system log with
+ * these reports.
+ */
+ RTLLIB_DEBUG_DROP("Decryption failed (not set) (SA= %pM)\n",
+ hdr->addr2);
+ ieee->ieee_stats.rx_discards_undecryptable++;
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats,
+ struct lib80211_crypt_data *crypt, size_t hdrlen)
+{
+ struct rtllib_hdr_4addr *hdr;
+ int keyidx = 0;
+ u16 fc, sc;
+ u8 frag;
+
+ hdr = (struct rtllib_hdr_4addr *)skb->data;
+ fc = le16_to_cpu(hdr->frame_ctl);
+ sc = le16_to_cpu(hdr->seq_ctl);
+ frag = WLAN_GET_SEQ_FRAG(sc);
+
+ if ((!rx_stats->Decrypted))
+ ieee->need_sw_enc = 1;
+ else
+ ieee->need_sw_enc = 0;
+
+ keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
+ if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
+ netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
+ return -1;
+ }
+
+ hdr = (struct rtllib_hdr_4addr *) skb->data;
+ if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
+ int flen;
+ struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
+
+ RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
+
+ if (!frag_skb) {
+ RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
+ "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
+ (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
+ WLAN_GET_SEQ_SEQ(sc), frag);
+ return -1;
+ }
+ flen = skb->len;
+ if (frag != 0)
+ flen -= hdrlen;
+
+ if (frag_skb->tail + flen > frag_skb->end) {
+ netdev_warn(ieee->dev,
+ "%s: host decrypted and reassembled frame did not fit skb\n",
+ __func__);
+ rtllib_frag_cache_invalidate(ieee, hdr);
+ return -1;
+ }
+
+ if (frag == 0) {
+ /* copy first fragment (including full headers) into
+ * beginning of the fragment cache skb
+ */
+ memcpy(skb_put(frag_skb, flen), skb->data, flen);
+ } else {
+ /* append frame payload to the end of the fragment
+ * cache skb
+ */
+ memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
+ flen);
+ }
+ dev_kfree_skb_any(skb);
+ skb = NULL;
+
+ if (fc & RTLLIB_FCTL_MOREFRAGS) {
+ /* more fragments expected - leave the skb in fragment
+ * cache for now; it will be delivered to upper layers
+ * after all fragments have been received
+ */
+ return -2;
+ }
+
+ /* this was the last fragment and the frame will be
+ * delivered, so remove skb from fragment cache
+ */
+ skb = frag_skb;
+ hdr = (struct rtllib_hdr_4addr *) skb->data;
+ rtllib_frag_cache_invalidate(ieee, hdr);
+ }
+
+ /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
+ * encrypted/authenticated
+ */
+ if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
+ rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
+ netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
+ return -1;
+ }
+
+ hdr = (struct rtllib_hdr_4addr *) skb->data;
+ if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
+ if (/*ieee->ieee802_1x &&*/
+ rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
+
+ /* pass unencrypted EAPOL frames even if encryption is
+ * configured
+ */
+ struct eapol *eap = (struct eapol *)(skb->data +
+ 24);
+ RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
+ eap_get_type(eap->type));
+ } else {
+ RTLLIB_DEBUG_DROP(
+ "encryption configured, but RX frame not encrypted (SA= %pM)\n",
+ hdr->addr2);
+ return -1;
+ }
+ }
+
+ if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
+ rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
+ struct eapol *eap = (struct eapol *)(skb->data +
+ 24);
+ RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
+ eap_get_type(eap->type));
+ }
+
+ if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
+ !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
+ RTLLIB_DEBUG_DROP(
+ "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
+ hdr->addr2);
+ return -1;
+ }
+
+ if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
+ netdev_warn(ieee->dev, "RX: IEEE802.1X EAPOL frame!\n");
+
+ return 0;
+}
+
+static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
+{
+ if (unicast) {
+
+ if (ieee->state == RTLLIB_LINKED) {
+ if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
+ ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
+ (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
+ if (ieee->LeisurePSLeave)
+ ieee->LeisurePSLeave(ieee->dev);
+ }
+ }
+ }
+ ieee->last_rx_ps_time = jiffies;
+}
+
+static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
+ struct rtllib_rx_stats *rx_stats,
+ struct rtllib_rxb *rxb,
+ u8 *dst,
+ u8 *src)
+{
+ struct net_device *dev = ieee->dev;
+ u16 ethertype;
+ int i = 0;
+
+ if (rxb == NULL) {
+ netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
+ return;
+ }
+
+ for (i = 0; i < rxb->nr_subframes; i++) {
+ struct sk_buff *sub_skb = rxb->subframes[i];
+
+ if (sub_skb) {
+ /* convert hdr + possible LLC headers into Ethernet header */
+ ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
+ if (sub_skb->len >= 8 &&
+ ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
+ ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
+ memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
+ /* remove RFC1042 or Bridge-Tunnel encapsulation and
+ * replace EtherType
+ */
+ skb_pull(sub_skb, SNAP_SIZE);
+ memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
+ memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
+ } else {
+ u16 len;
+ /* Leave Ethernet header part of hdr and full payload */
+ len = sub_skb->len;
+ memcpy(skb_push(sub_skb, 2), &len, 2);
+ memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
+ memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
+ }
+
+ ieee->stats.rx_packets++;
+ ieee->stats.rx_bytes += sub_skb->len;
+
+ if (is_multicast_ether_addr(dst))
+ ieee->stats.multicast++;
+
+ /* Indicate the packets to upper layer */
+ memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
+ sub_skb->protocol = eth_type_trans(sub_skb, dev);
+ sub_skb->dev = dev;
+ sub_skb->dev->stats.rx_packets++;
+ sub_skb->dev->stats.rx_bytes += sub_skb->len;
+ sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
+ netif_rx(sub_skb);
+ }
+ }
+ kfree(rxb);
+}
+
+static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats)
+{
+ struct net_device *dev = ieee->dev;
+ struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
+ struct lib80211_crypt_data *crypt = NULL;
+ struct rtllib_rxb *rxb = NULL;
+ struct rx_ts_record *pTS = NULL;
+ u16 fc, sc, SeqNum = 0;
+ u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
+ u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
+ size_t hdrlen = 0;
+ bool bToOtherSTA = false;
+ int ret = 0, i = 0;
+
+ hdr = (struct rtllib_hdr_4addr *)skb->data;
+ fc = le16_to_cpu(hdr->frame_ctl);
+ type = WLAN_FC_GET_TYPE(fc);
+ stype = WLAN_FC_GET_STYPE(fc);
+ sc = le16_to_cpu(hdr->seq_ctl);
+
+ /*Filter pkt not to me*/
+ multicast = is_multicast_ether_addr(hdr->addr1);
+ unicast = !multicast;
+ if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
+ if (ieee->bNetPromiscuousMode)
+ bToOtherSTA = true;
+ else
+ goto rx_dropped;
+ }
+
+ /*Filter pkt has too small length */
+ hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
+ if (skb->len < hdrlen) {
+ netdev_info(dev, "%s():ERR!!! skb->len is smaller than hdrlen\n",
+ __func__);
+ goto rx_dropped;
+ }
+
+ /* Filter Duplicate pkt */
+ ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
+ if (ret < 0)
+ goto rx_dropped;
+
+ /* Filter CTRL Frame */
+ if (type == RTLLIB_FTYPE_CTL)
+ goto rx_dropped;
+
+ /* Filter MGNT Frame */
+ if (type == RTLLIB_FTYPE_MGMT) {
+ if (bToOtherSTA)
+ goto rx_dropped;
+ if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
+ goto rx_dropped;
+ else
+ goto rx_exit;
+ }
+
+ /* Filter WAPI DATA Frame */
+
+ /* Update statstics for AP roaming */
+ if (!bToOtherSTA) {
+ ieee->LinkDetectInfo.NumRecvDataInPeriod++;
+ ieee->LinkDetectInfo.NumRxOkInPeriod++;
+ }
+ dev->last_rx = jiffies;
+
+ /* Data frame - extract src/dst addresses */
+ rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
+
+ /* Filter Data frames */
+ ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
+ if (ret < 0)
+ goto rx_dropped;
+
+ if (skb->len == hdrlen)
+ goto rx_dropped;
+
+ /* Send pspoll based on moredata */
+ if ((ieee->iw_mode == IW_MODE_INFRA) && (ieee->sta_sleep == LPS_IS_SLEEP)
+ && (ieee->polling) && (!bToOtherSTA)) {
+ if (WLAN_FC_MORE_DATA(fc)) {
+ /* more data bit is set, let's request a new frame from the AP */
+ rtllib_sta_ps_send_pspoll_frame(ieee);
+ } else {
+ ieee->polling = false;
+ }
+ }
+
+ /* Get crypt if encrypted */
+ ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
+ if (ret == -1)
+ goto rx_dropped;
+
+ /* Decrypt data frame (including reassemble) */
+ ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
+ if (ret == -1)
+ goto rx_dropped;
+ else if (ret == -2)
+ goto rx_exit;
+
+ /* Get TS for Rx Reorder */
+ hdr = (struct rtllib_hdr_4addr *) skb->data;
+ if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
+ && !is_multicast_ether_addr(hdr->addr1)
+ && (!bToOtherSTA)) {
+ TID = Frame_QoSTID(skb->data);
+ SeqNum = WLAN_GET_SEQ_SEQ(sc);
+ GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
+ if (TID != 0 && TID != 3)
+ ieee->bis_any_nonbepkts = true;
+ }
+
+ /* Parse rx data frame (For AMSDU) */
+ /* skb: hdr + (possible reassembled) full plaintext payload */
+ payload = skb->data + hdrlen;
+ rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
+ if (rxb == NULL)
+ goto rx_dropped;
+
+ /* to parse amsdu packets */
+ /* qos data packets & reserved bit is 1 */
+ if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
+ /* only to free rxb, and not submit the packets to upper layer */
+ for (i = 0; i < rxb->nr_subframes; i++)
+ dev_kfree_skb(rxb->subframes[i]);
+ kfree(rxb);
+ rxb = NULL;
+ goto rx_dropped;
+ }
+
+ /* Update WAPI PN */
+
+ /* Check if leave LPS */
+ if (!bToOtherSTA) {
+ if (ieee->bIsAggregateFrame)
+ nr_subframes = rxb->nr_subframes;
+ else
+ nr_subframes = 1;
+ if (unicast)
+ ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
+ rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
+ }
+
+ /* Indicate packets to upper layer or Rx Reorder */
+ if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
+ rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
+ else
+ RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
+
+ dev_kfree_skb(skb);
+
+ rx_exit:
+ return 1;
+
+ rx_dropped:
+ ieee->stats.rx_dropped++;
+
+ /* Returning 0 indicates to caller that we have not handled the SKB--
+ * so it is still allocated and can be used again by underlying
+ * hardware as a DMA target
+ */
+ return 0;
+}
+
+static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats)
+{
+ return 0;
+}
+
+static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats)
+{
+ struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
+ u16 fc = le16_to_cpu(hdr->frame_ctl);
+ size_t hdrlen = rtllib_get_hdrlen(fc);
+
+ if (skb->len < hdrlen) {
+ netdev_info(ieee->dev,
+ "%s():ERR!!! skb->len is smaller than hdrlen\n",
+ __func__);
+ return 0;
+ }
+
+ if (HTCCheck(ieee, skb->data)) {
+ if (net_ratelimit())
+ netdev_info(ieee->dev, "%s: Find HTCControl!\n",
+ __func__);
+ hdrlen += 4;
+ }
+
+ rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
+ ieee->stats.rx_packets++;
+ ieee->stats.rx_bytes += skb->len;
+
+ return 1;
+}
+
+static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats)
+{
+ return 0;
+}
+
+/* All received frames are sent to this function. @skb contains the frame in
+ * IEEE 802.11 format, i.e., in the format it was sent over air.
+ * This function is called only as a tasklet (software IRQ).
+ */
+int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
+ struct rtllib_rx_stats *rx_stats)
+{
+ int ret = 0;
+
+ if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
+ pr_info("%s: Input parameters NULL!\n", __func__);
+ goto rx_dropped;
+ }
+ if (skb->len < 10) {
+ netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
+ goto rx_dropped;
+ }
+
+ switch (ieee->iw_mode) {
+ case IW_MODE_ADHOC:
+ case IW_MODE_INFRA:
+ ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
+ break;
+ case IW_MODE_MASTER:
+ case IW_MODE_REPEAT:
+ ret = rtllib_rx_Master(ieee, skb, rx_stats);
+ break;
+ case IW_MODE_MONITOR:
+ ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
+ break;
+ case IW_MODE_MESH:
+ ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
+ break;
+ default:
+ netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
+ break;
+ }
+
+ return ret;
+
+ rx_dropped:
+ if (ieee)
+ ieee->stats.rx_dropped++;
+ return 0;
+}
+EXPORT_SYMBOL(rtllib_rx);
+
+static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
+
+/* Make ther structure we read from the beacon packet has the right values */
+static int rtllib_verify_qos_info(struct rtllib_qos_information_element
+ *info_element, int sub_type)
+{
+
+ if (info_element->qui_subtype != sub_type)
+ return -1;
+ if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
+ return -1;
+ if (info_element->qui_type != QOS_OUI_TYPE)
+ return -1;
+ if (info_element->version != QOS_VERSION_1)
+ return -1;
+
+ return 0;
+}
+
+
+/* Parse a QoS parameter element */
+static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
+ *element_param, struct rtllib_info_element
+ *info_element)
+{
+ int ret = 0;
+ u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
+
+ if ((info_element == NULL) || (element_param == NULL))
+ return -1;
+
+ if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
+ memcpy(element_param->info_element.qui, info_element->data,
+ info_element->len);
+ element_param->info_element.elementID = info_element->id;
+ element_param->info_element.length = info_element->len;
+ } else
+ ret = -1;
+ if (ret == 0)
+ ret = rtllib_verify_qos_info(&element_param->info_element,
+ QOS_OUI_PARAM_SUB_TYPE);
+ return ret;
+}
+
+/* Parse a QoS information element */
+static int rtllib_read_qos_info_element(struct
+ rtllib_qos_information_element
+ *element_info, struct rtllib_info_element
+ *info_element)
+{
+ int ret = 0;
+ u16 size = sizeof(struct rtllib_qos_information_element) - 2;
+
+ if (element_info == NULL)
+ return -1;
+ if (info_element == NULL)
+ return -1;
+
+ if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
+ memcpy(element_info->qui, info_element->data,
+ info_element->len);
+ element_info->elementID = info_element->id;
+ element_info->length = info_element->len;
+ } else
+ ret = -1;
+
+ if (ret == 0)
+ ret = rtllib_verify_qos_info(element_info,
+ QOS_OUI_INFO_SUB_TYPE);
+ return ret;
+}
+
+
+/* Write QoS parameters from the ac parameters. */
+static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
+ struct rtllib_qos_data *qos_data)
+{
+ struct rtllib_qos_ac_parameter *ac_params;
+ struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
+ int i;
+ u8 aci;
+ u8 acm;
+
+ qos_data->wmm_acm = 0;
+ for (i = 0; i < QOS_QUEUE_NUM; i++) {
+ ac_params = &(param_elm->ac_params_record[i]);
+
+ aci = (ac_params->aci_aifsn & 0x60) >> 5;
+ acm = (ac_params->aci_aifsn & 0x10) >> 4;
+
+ if (aci >= QOS_QUEUE_NUM)
+ continue;
+ switch (aci) {
+ case 1:
+ /* BIT(0) | BIT(3) */
+ if (acm)
+ qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
+ break;
+ case 2:
+ /* BIT(4) | BIT(5) */
+ if (acm)
+ qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
+ break;
+ case 3:
+ /* BIT(6) | BIT(7) */
+ if (acm)
+ qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
+ break;
+ case 0:
+ default:
+ /* BIT(1) | BIT(2) */
+ if (acm)
+ qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
+ break;
+ }
+
+ qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
+
+ /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
+ qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
+
+ qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 0x0F);
+
+ qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
+
+ qos_param->flag[aci] =
+ (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
+ qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
+ }
+ return 0;
+}
+
+/* we have a generic data element which it may contain QoS information or
+ * parameters element. check the information element length to decide
+ * which type to read
+ */
+static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
+ *info_element,
+ struct rtllib_network *network)
+{
+ int rc = 0;
+ struct rtllib_qos_information_element qos_info_element;
+
+ rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
+
+ if (rc == 0) {
+ network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
+ network->flags |= NETWORK_HAS_QOS_INFORMATION;
+ } else {
+ struct rtllib_qos_parameter_info param_element;
+
+ rc = rtllib_read_qos_param_element(¶m_element,
+ info_element);
+ if (rc == 0) {
+ rtllib_qos_convert_ac_to_parameters(¶m_element,
+ &(network->qos_data));
+ network->flags |= NETWORK_HAS_QOS_PARAMETERS;
+ network->qos_data.param_count =
+ param_element.info_element.ac_info & 0x0F;
+ }
+ }
+
+ if (rc == 0) {
+ RTLLIB_DEBUG_QOS("QoS is supported\n");
+ network->qos_data.supported = 1;
+ }
+ return rc;
+}
+
+#define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
+
+static const char *get_info_element_string(u16 id)
+{
+ switch (id) {
+ MFIE_STRING(SSID);
+ MFIE_STRING(RATES);
+ MFIE_STRING(FH_SET);
+ MFIE_STRING(DS_SET);
+ MFIE_STRING(CF_SET);
+ MFIE_STRING(TIM);
+ MFIE_STRING(IBSS_SET);
+ MFIE_STRING(COUNTRY);
+ MFIE_STRING(HOP_PARAMS);
+ MFIE_STRING(HOP_TABLE);
+ MFIE_STRING(REQUEST);
+ MFIE_STRING(CHALLENGE);
+ MFIE_STRING(POWER_CONSTRAINT);
+ MFIE_STRING(POWER_CAPABILITY);
+ MFIE_STRING(TPC_REQUEST);
+ MFIE_STRING(TPC_REPORT);
+ MFIE_STRING(SUPP_CHANNELS);
+ MFIE_STRING(CSA);
+ MFIE_STRING(MEASURE_REQUEST);
+ MFIE_STRING(MEASURE_REPORT);
+ MFIE_STRING(QUIET);
+ MFIE_STRING(IBSS_DFS);
+ MFIE_STRING(RSN);
+ MFIE_STRING(RATES_EX);
+ MFIE_STRING(GENERIC);
+ MFIE_STRING(QOS_PARAMETER);
+ default:
+ return "UNKNOWN";
+ }
+}
+
+static inline void rtllib_extract_country_ie(
+ struct rtllib_device *ieee,
+ struct rtllib_info_element *info_element,
+ struct rtllib_network *network,
+ u8 *addr2)
+{
+ if (IS_DOT11D_ENABLE(ieee)) {
+ if (info_element->len != 0) {
+ memcpy(network->CountryIeBuf, info_element->data, info_element->len);
+ network->CountryIeLen = info_element->len;
+
+ if (!IS_COUNTRY_IE_VALID(ieee)) {
+ if (rtllib_act_scanning(ieee, false) && ieee->FirstIe_InScan)
+ netdev_info(ieee->dev,
+ "Received beacon ContryIE, SSID: <%s>\n",
+ network->ssid);
+ Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
+ }
+ }
+
+ if (IS_EQUAL_CIE_SRC(ieee, addr2))
+ UPDATE_CIE_WATCHDOG(ieee);
+ }
+
+}
+
+int rtllib_parse_info_param(struct rtllib_device *ieee,
+ struct rtllib_info_element *info_element,
+ u16 length,
+ struct rtllib_network *network,
+ struct rtllib_rx_stats *stats)
+{
+ u8 i;
+ short offset;
+ u16 tmp_htcap_len = 0;
+ u16 tmp_htinfo_len = 0;
+ u16 ht_realtek_agg_len = 0;
+ u8 ht_realtek_agg_buf[MAX_IE_LEN];
+ char rates_str[64];
+ char *p;
+
+ while (length >= sizeof(*info_element)) {
+ if (sizeof(*info_element) + info_element->len > length) {
+ RTLLIB_DEBUG_MGMT("Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
+ info_element->len +
+ sizeof(*info_element),
+ length, info_element->id);
+ /* We stop processing but don't return an error here
+ * because some misbehaviour APs break this rule. ie.
+ * Orinoco AP1000.
+ */
+ break;
+ }
+
+ switch (info_element->id) {
+ case MFIE_TYPE_SSID:
+ if (rtllib_is_empty_essid(info_element->data,
+ info_element->len)) {
+ network->flags |= NETWORK_EMPTY_ESSID;
+ break;
+ }
+
+ network->ssid_len = min(info_element->len,
+ (u8) IW_ESSID_MAX_SIZE);
+ memcpy(network->ssid, info_element->data, network->ssid_len);
+ if (network->ssid_len < IW_ESSID_MAX_SIZE)
+ memset(network->ssid + network->ssid_len, 0,
+ IW_ESSID_MAX_SIZE - network->ssid_len);
+
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
+ network->ssid, network->ssid_len);
+ break;
+
+ case MFIE_TYPE_RATES:
+ p = rates_str;
+ network->rates_len = min(info_element->len,
+ MAX_RATES_LENGTH);
+ for (i = 0; i < network->rates_len; i++) {
+ network->rates[i] = info_element->data[i];
+ p += snprintf(p, sizeof(rates_str) -
+ (p - rates_str), "%02X ",
+ network->rates[i]);
+ if (rtllib_is_ofdm_rate
+ (info_element->data[i])) {
+ network->flags |= NETWORK_HAS_OFDM;
+ if (info_element->data[i] &
+ RTLLIB_BASIC_RATE_MASK)
+ network->flags &=
+ ~NETWORK_HAS_CCK;
+ }
+
+ if (rtllib_is_cck_rate
+ (info_element->data[i])) {
+ network->flags |= NETWORK_HAS_CCK;
+ }
+ }
+
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
+ rates_str, network->rates_len);
+ break;
+
+ case MFIE_TYPE_RATES_EX:
+ p = rates_str;
+ network->rates_ex_len = min(info_element->len,
+ MAX_RATES_EX_LENGTH);
+ for (i = 0; i < network->rates_ex_len; i++) {
+ network->rates_ex[i] = info_element->data[i];
+ p += snprintf(p, sizeof(rates_str) -
+ (p - rates_str), "%02X ",
+ network->rates_ex[i]);
+ if (rtllib_is_ofdm_rate
+ (info_element->data[i])) {
+ network->flags |= NETWORK_HAS_OFDM;
+ if (info_element->data[i] &
+ RTLLIB_BASIC_RATE_MASK)
+ network->flags &=
+ ~NETWORK_HAS_CCK;
+ }
+ }
+
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
+ rates_str, network->rates_ex_len);
+ break;
+
+ case MFIE_TYPE_DS_SET:
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
+ info_element->data[0]);
+ network->channel = info_element->data[0];
+ break;
+
+ case MFIE_TYPE_FH_SET:
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
+ break;
+
+ case MFIE_TYPE_CF_SET:
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
+ break;
+
+ case MFIE_TYPE_TIM:
+ if (info_element->len < 4)
+ break;
+
+ network->tim.tim_count = info_element->data[0];
+ network->tim.tim_period = info_element->data[1];
+
+ network->dtim_period = info_element->data[1];
+ if (ieee->state != RTLLIB_LINKED)
+ break;
+ network->last_dtim_sta_time = jiffies;
+
+ network->dtim_data = RTLLIB_DTIM_VALID;
+
+
+ if (info_element->data[2] & 1)
+ network->dtim_data |= RTLLIB_DTIM_MBCAST;
+
+ offset = (info_element->data[2] >> 1)*2;
+
+
+ if (ieee->assoc_id < 8*offset ||
+ ieee->assoc_id > 8*(offset + info_element->len - 3))
+ break;
+
+ offset = (ieee->assoc_id / 8) - offset;
+ if (info_element->data[3 + offset] &
+ (1 << (ieee->assoc_id % 8)))
+ network->dtim_data |= RTLLIB_DTIM_UCAST;
+
+ network->listen_interval = network->dtim_period;
+ break;
+
+ case MFIE_TYPE_ERP:
+ network->erp_value = info_element->data[0];
+ network->flags |= NETWORK_HAS_ERP_VALUE;
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
+ network->erp_value);
+ break;
+ case MFIE_TYPE_IBSS_SET:
+ network->atim_window = info_element->data[0];
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
+ network->atim_window);
+ break;
+
+ case MFIE_TYPE_CHALLENGE:
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
+ break;
+
+ case MFIE_TYPE_GENERIC:
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
+ info_element->len);
+ if (!rtllib_parse_qos_info_param_IE(info_element,
+ network))
+ break;
+ if (info_element->len >= 4 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x50 &&
+ info_element->data[2] == 0xf2 &&
+ info_element->data[3] == 0x01) {
+ network->wpa_ie_len = min(info_element->len + 2,
+ MAX_WPA_IE_LEN);
+ memcpy(network->wpa_ie, info_element,
+ network->wpa_ie_len);
+ break;
+ }
+ if (info_element->len == 7 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0xe0 &&
+ info_element->data[2] == 0x4c &&
+ info_element->data[3] == 0x01 &&
+ info_element->data[4] == 0x02)
+ network->Turbo_Enable = 1;
+
+ if (tmp_htcap_len == 0) {
+ if (info_element->len >= 4 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x90 &&
+ info_element->data[2] == 0x4c &&
+ info_element->data[3] == 0x033) {
+
+ tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
+ if (tmp_htcap_len != 0) {
+ network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
+ network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
+ sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
+ memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
+ }
+ }
+ if (tmp_htcap_len != 0) {
+ network->bssht.bdSupportHT = true;
+ network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
+ } else {
+ network->bssht.bdSupportHT = false;
+ network->bssht.bdHT1R = false;
+ }
+ }
+
+
+ if (tmp_htinfo_len == 0) {
+ if (info_element->len >= 4 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x90 &&
+ info_element->data[2] == 0x4c &&
+ info_element->data[3] == 0x034) {
+ tmp_htinfo_len = min_t(u8, info_element->len, MAX_IE_LEN);
+ if (tmp_htinfo_len != 0) {
+ network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
+ if (tmp_htinfo_len) {
+ network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ?
+ sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
+ memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
+ }
+
+ }
+
+ }
+ }
+
+ if (ieee->aggregation) {
+ if (network->bssht.bdSupportHT) {
+ if (info_element->len >= 4 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0xe0 &&
+ info_element->data[2] == 0x4c &&
+ info_element->data[3] == 0x02) {
+ ht_realtek_agg_len = min_t(u8, info_element->len, MAX_IE_LEN);
+ memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
+ }
+ if (ht_realtek_agg_len >= 5) {
+ network->realtek_cap_exit = true;
+ network->bssht.bdRT2RTAggregation = true;
+
+ if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
+ network->bssht.bdRT2RTLongSlotTime = true;
+
+ if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
+ network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
+ }
+ }
+ if (ht_realtek_agg_len >= 5) {
+ if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
+ network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
+ }
+ }
+
+ if ((info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x05 &&
+ info_element->data[2] == 0xb5) ||
+ (info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x0a &&
+ info_element->data[2] == 0xf7) ||
+ (info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x10 &&
+ info_element->data[2] == 0x18)) {
+ network->broadcom_cap_exist = true;
+ }
+ if (info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x0c &&
+ info_element->data[2] == 0x43)
+ network->ralink_cap_exist = true;
+ if ((info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x03 &&
+ info_element->data[2] == 0x7f) ||
+ (info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x13 &&
+ info_element->data[2] == 0x74))
+ network->atheros_cap_exist = true;
+
+ if ((info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x50 &&
+ info_element->data[2] == 0x43))
+ network->marvell_cap_exist = true;
+ if (info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x40 &&
+ info_element->data[2] == 0x96)
+ network->cisco_cap_exist = true;
+
+
+ if (info_element->len >= 3 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x0a &&
+ info_element->data[2] == 0xf5)
+ network->airgo_cap_exist = true;
+
+ if (info_element->len > 4 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x40 &&
+ info_element->data[2] == 0x96 &&
+ info_element->data[3] == 0x01) {
+ if (info_element->len == 6) {
+ memcpy(network->CcxRmState, &info_element[4], 2);
+ if (network->CcxRmState[0] != 0)
+ network->bCcxRmEnable = true;
+ else
+ network->bCcxRmEnable = false;
+ network->MBssidMask = network->CcxRmState[1] & 0x07;
+ if (network->MBssidMask != 0) {
+ network->bMBssidValid = true;
+ network->MBssidMask = 0xff << (network->MBssidMask);
+ memcpy(network->MBssid, network->bssid, ETH_ALEN);
+ network->MBssid[5] &= network->MBssidMask;
+ } else {
+ network->bMBssidValid = false;
+ }
+ } else {
+ network->bCcxRmEnable = false;
+ }
+ }
+ if (info_element->len > 4 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x40 &&
+ info_element->data[2] == 0x96 &&
+ info_element->data[3] == 0x03) {
+ if (info_element->len == 5) {
+ network->bWithCcxVerNum = true;
+ network->BssCcxVerNumber = info_element->data[4];
+ } else {
+ network->bWithCcxVerNum = false;
+ network->BssCcxVerNumber = 0;
+ }
+ }
+ if (info_element->len > 4 &&
+ info_element->data[0] == 0x00 &&
+ info_element->data[1] == 0x50 &&
+ info_element->data[2] == 0xf2 &&
+ info_element->data[3] == 0x04) {
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
+ info_element->len);
+ network->wzc_ie_len = min(info_element->len+2,
+ MAX_WZC_IE_LEN);
+ memcpy(network->wzc_ie, info_element,
+ network->wzc_ie_len);
+ }
+ break;
+
+ case MFIE_TYPE_RSN:
+ RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
+ info_element->len);
+ network->rsn_ie_len = min(info_element->len + 2,
+ MAX_WPA_IE_LEN);
+ memcpy(network->rsn_ie, info_element,
+ network->rsn_ie_len);
+ break;
+
+ case MFIE_TYPE_HT_CAP:
+ RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
+ info_element->len);
+ tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
+ if (tmp_htcap_len != 0) {
+ network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
+ network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
+ sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
+ memcpy(network->bssht.bdHTCapBuf,
+ info_element->data,
+ network->bssht.bdHTCapLen);
+
+ network->bssht.bdSupportHT = true;
+ network->bssht.bdHT1R = ((((struct ht_capab_ele *)
+ network->bssht.bdHTCapBuf))->MCS[1]) == 0;
+
+ network->bssht.bdBandWidth = (enum ht_channel_width)
+ (((struct ht_capab_ele *)
+ (network->bssht.bdHTCapBuf))->ChlWidth);
+ } else {
+ network->bssht.bdSupportHT = false;
+ network->bssht.bdHT1R = false;
+ network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
+ }
+ break;
+
+
+ case MFIE_TYPE_HT_INFO:
+ RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
+ info_element->len);
+ tmp_htinfo_len = min_t(u8, info_element->len, MAX_IE_LEN);
+ if (tmp_htinfo_len) {
+ network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
+ network->bssht.bdHTInfoLen = tmp_htinfo_len >
+ sizeof(network->bssht.bdHTInfoBuf) ?
+ sizeof(network->bssht.bdHTInfoBuf) :
+ tmp_htinfo_len;
+ memcpy(network->bssht.bdHTInfoBuf,
+ info_element->data,
+ network->bssht.bdHTInfoLen);
+ }
+ break;
+
+ case MFIE_TYPE_AIRONET:
+ RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
+ info_element->len);
+ if (info_element->len > IE_CISCO_FLAG_POSITION) {
+ network->bWithAironetIE = true;
+
+ if ((info_element->data[IE_CISCO_FLAG_POSITION]
+ & SUPPORT_CKIP_MIC) ||
+ (info_element->data[IE_CISCO_FLAG_POSITION]
+ & SUPPORT_CKIP_PK))
+ network->bCkipSupported = true;
+ else
+ network->bCkipSupported = false;
+ } else {
+ network->bWithAironetIE = false;
+ network->bCkipSupported = false;
+ }
+ break;
+ case MFIE_TYPE_QOS_PARAMETER:
+ netdev_err(ieee->dev,
+ "QoS Error need to parse QOS_PARAMETER IE\n");
+ break;
+
+ case MFIE_TYPE_COUNTRY:
+ RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
+ info_element->len);
+ rtllib_extract_country_ie(ieee, info_element, network,
+ network->bssid);
+ break;
+/* TODO */
+ default:
+ RTLLIB_DEBUG_MGMT
+ ("Unsupported info element: %s (%d)\n",
+ get_info_element_string(info_element->id),
+ info_element->id);
+ break;
+ }
+
+ length -= sizeof(*info_element) + info_element->len;
+ info_element =
+ (struct rtllib_info_element *)&info_element->
+ data[info_element->len];
+ }
+
+ if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
+ !network->cisco_cap_exist && !network->ralink_cap_exist &&
+ !network->bssht.bdRT2RTAggregation)
+ network->unknown_cap_exist = true;
+ else
+ network->unknown_cap_exist = false;
+ return 0;
+}
+
+static long rtllib_translate_todbm(u8 signal_strength_index)
+{
+ long signal_power;
+
+ signal_power = (long)((signal_strength_index + 1) >> 1);
+ signal_power -= 95;
+
+ return signal_power;
+}
+
+static inline int rtllib_network_init(
+ struct rtllib_device *ieee,
+ struct rtllib_probe_response *beacon,
+ struct rtllib_network *network,
+ struct rtllib_rx_stats *stats)
+{
+ memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
+
+ /* Pull out fixed field data */
+ memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
+ network->capability = le16_to_cpu(beacon->capability);
+ network->last_scanned = jiffies;
+ network->time_stamp[0] = beacon->time_stamp[0];
+ network->time_stamp[1] = beacon->time_stamp[1];
+ network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
+ /* Where to pull this? beacon->listen_interval;*/
+ network->listen_interval = 0x0A;
+ network->rates_len = network->rates_ex_len = 0;
+ network->last_associate = 0;
+ network->ssid_len = 0;
+ network->hidden_ssid_len = 0;
+ memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
+ network->flags = 0;
+ network->atim_window = 0;
+ network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
+ 0x3 : 0x0;
+ network->berp_info_valid = false;
+ network->broadcom_cap_exist = false;
+ network->ralink_cap_exist = false;
+ network->atheros_cap_exist = false;
+ network->cisco_cap_exist = false;
+ network->unknown_cap_exist = false;
+ network->realtek_cap_exit = false;
+ network->marvell_cap_exist = false;
+ network->airgo_cap_exist = false;
+ network->Turbo_Enable = 0;
+ network->SignalStrength = stats->SignalStrength;
+ network->RSSI = stats->SignalStrength;
+ network->CountryIeLen = 0;
+ memset(network->CountryIeBuf, 0, MAX_IE_LEN);
+ HTInitializeBssDesc(&network->bssht);
+ if (stats->freq == RTLLIB_52GHZ_BAND) {
+ /* for A band (No DS info) */
+ network->channel = stats->received_channel;
+ } else
+ network->flags |= NETWORK_HAS_CCK;
+
+ network->wpa_ie_len = 0;
+ network->rsn_ie_len = 0;
+ network->wzc_ie_len = 0;
+
+ if (rtllib_parse_info_param(ieee,
+ beacon->info_element,
+ (stats->len - sizeof(*beacon)),
+ network,
+ stats))
+ return 1;
+
+ network->mode = 0;
+ if (stats->freq == RTLLIB_52GHZ_BAND)
+ network->mode = IEEE_A;
+ else {
+ if (network->flags & NETWORK_HAS_OFDM)
+ network->mode |= IEEE_G;
+ if (network->flags & NETWORK_HAS_CCK)
+ network->mode |= IEEE_B;
+ }
+
+ if (network->mode == 0) {
+ RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' network.\n",
+ escape_essid(network->ssid,
+ network->ssid_len),
+ network->bssid);
+ return 1;
+ }
+
+ if (network->bssht.bdSupportHT) {
+ if (network->mode == IEEE_A)
+ network->mode = IEEE_N_5G;
+ else if (network->mode & (IEEE_G | IEEE_B))
+ network->mode = IEEE_N_24G;
+ }
+ if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
+ network->flags |= NETWORK_EMPTY_ESSID;
+ stats->signal = 30 + (stats->SignalStrength * 70) / 100;
+ stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
+
+ memcpy(&network->stats, stats, sizeof(network->stats));
+
+ return 0;
+}
+
+static inline int is_same_network(struct rtllib_network *src,
+ struct rtllib_network *dst, u8 ssidbroad)
+{
+ /* A network is only a duplicate if the channel, BSSID, ESSID
+ * and the capability field (in particular IBSS and BSS) all match.
+ * We treat all <hidden> with the same BSSID and channel
+ * as one network
+ */
+ return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
+ (src->channel == dst->channel) &&
+ !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
+ (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
+ (!ssidbroad)) &&
+ ((src->capability & WLAN_CAPABILITY_IBSS) ==
+ (dst->capability & WLAN_CAPABILITY_IBSS)) &&
+ ((src->capability & WLAN_CAPABILITY_ESS) ==
+ (dst->capability & WLAN_CAPABILITY_ESS)));
+}
+
+
+static inline void update_network(struct rtllib_network *dst,
+ struct rtllib_network *src)
+{
+ int qos_active;
+ u8 old_param;
+
+ memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
+ dst->capability = src->capability;
+ memcpy(dst->rates, src->rates, src->rates_len);
+ dst->rates_len = src->rates_len;
+ memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
+ dst->rates_ex_len = src->rates_ex_len;
+ if (src->ssid_len > 0) {
+ if (dst->ssid_len == 0) {
+ memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
+ dst->hidden_ssid_len = src->ssid_len;
+ memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
+ } else {
+ memset(dst->ssid, 0, dst->ssid_len);
+ dst->ssid_len = src->ssid_len;
+ memcpy(dst->ssid, src->ssid, src->ssid_len);
+ }
+ }
+ dst->mode = src->mode;
+ dst->flags = src->flags;
+ dst->time_stamp[0] = src->time_stamp[0];
+ dst->time_stamp[1] = src->time_stamp[1];
+ if (src->flags & NETWORK_HAS_ERP_VALUE) {
+ dst->erp_value = src->erp_value;
+ dst->berp_info_valid = src->berp_info_valid = true;
+ }
+ dst->beacon_interval = src->beacon_interval;
+ dst->listen_interval = src->listen_interval;
+ dst->atim_window = src->atim_window;
+ dst->dtim_period = src->dtim_period;
+ dst->dtim_data = src->dtim_data;
+ dst->last_dtim_sta_time = src->last_dtim_sta_time;
+ memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
+
+ dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
+ dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
+ dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
+ memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
+ src->bssht.bdHTCapLen);
+ dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
+ memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
+ src->bssht.bdHTInfoLen);
+ dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
+ dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
+ dst->broadcom_cap_exist = src->broadcom_cap_exist;
+ dst->ralink_cap_exist = src->ralink_cap_exist;
+ dst->atheros_cap_exist = src->atheros_cap_exist;
+ dst->realtek_cap_exit = src->realtek_cap_exit;
+ dst->marvell_cap_exist = src->marvell_cap_exist;
+ dst->cisco_cap_exist = src->cisco_cap_exist;
+ dst->airgo_cap_exist = src->airgo_cap_exist;
+ dst->unknown_cap_exist = src->unknown_cap_exist;
+ memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
+ dst->wpa_ie_len = src->wpa_ie_len;
+ memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
+ dst->rsn_ie_len = src->rsn_ie_len;
+ memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
+ dst->wzc_ie_len = src->wzc_ie_len;
+
+ dst->last_scanned = jiffies;
+ /* qos related parameters */
+ qos_active = dst->qos_data.active;
+ old_param = dst->qos_data.param_count;
+ dst->qos_data.supported = src->qos_data.supported;
+ if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
+ memcpy(&dst->qos_data, &src->qos_data,
+ sizeof(struct rtllib_qos_data));
+ if (dst->qos_data.supported == 1) {
+ if (dst->ssid_len)
+ RTLLIB_DEBUG_QOS
+ ("QoS the network %s is QoS supported\n",
+ dst->ssid);
+ else
+ RTLLIB_DEBUG_QOS
+ ("QoS the network is QoS supported\n");
+ }
+ dst->qos_data.active = qos_active;
+ dst->qos_data.old_param_count = old_param;
+
+ /* dst->last_associate is not overwritten */
+ dst->wmm_info = src->wmm_info;
+ if (src->wmm_param[0].ac_aci_acm_aifsn ||
+ src->wmm_param[1].ac_aci_acm_aifsn ||
+ src->wmm_param[2].ac_aci_acm_aifsn ||
+ src->wmm_param[3].ac_aci_acm_aifsn)
+ memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
+
+ dst->SignalStrength = src->SignalStrength;
+ dst->RSSI = src->RSSI;
+ dst->Turbo_Enable = src->Turbo_Enable;
+
+ dst->CountryIeLen = src->CountryIeLen;
+ memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
+
+ dst->bWithAironetIE = src->bWithAironetIE;
+ dst->bCkipSupported = src->bCkipSupported;
+ memcpy(dst->CcxRmState, src->CcxRmState, 2);
+ dst->bCcxRmEnable = src->bCcxRmEnable;
+ dst->MBssidMask = src->MBssidMask;
+ dst->bMBssidValid = src->bMBssidValid;
+ memcpy(dst->MBssid, src->MBssid, 6);
+ dst->bWithCcxVerNum = src->bWithCcxVerNum;
+ dst->BssCcxVerNumber = src->BssCcxVerNumber;
+}
+
+static inline int is_beacon(__le16 fc)
+{
+ return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
+}
+
+static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
+{
+ if (MAX_CHANNEL_NUMBER < channel) {
+ netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
+ return 0;
+ }
+
+ if (rtllib->active_channel_map[channel] == 2)
+ return 1;
+
+ return 0;
+}
+
+int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
+{
+ if (MAX_CHANNEL_NUMBER < channel) {
+ netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
+ return 0;
+ }
+ if (rtllib->active_channel_map[channel] > 0)
+ return 1;
+
+ return 0;
+}
+EXPORT_SYMBOL(rtllib_legal_channel);
+
+static inline void rtllib_process_probe_response(
+ struct rtllib_device *ieee,
+ struct rtllib_probe_response *beacon,
+ struct rtllib_rx_stats *stats)
+{
+ struct rtllib_network *target;
+ struct rtllib_network *oldest = NULL;
+ struct rtllib_info_element *info_element = &beacon->info_element[0];
+ unsigned long flags;
+ short renew;
+ struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
+ GFP_ATOMIC);
+
+ if (!network)
+ return;
+
+ RTLLIB_DEBUG_SCAN(
+ "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
+ escape_essid(info_element->data, info_element->len),
+ beacon->header.addr3,
+ (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
+ (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
+
+ if (rtllib_network_init(ieee, beacon, network, stats)) {
+ RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
+ escape_essid(info_element->data,
+ info_element->len),
+ beacon->header.addr3,
+ WLAN_FC_GET_STYPE(
+ le16_to_cpu(beacon->header.frame_ctl)) ==
+ RTLLIB_STYPE_PROBE_RESP ?
+ "PROBE RESPONSE" : "BEACON");
+ goto free_network;
+ }
+
+
+ if (!rtllib_legal_channel(ieee, network->channel))
+ goto free_network;
+
+ if (WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)) ==
+ RTLLIB_STYPE_PROBE_RESP) {
+ if (IsPassiveChannel(ieee, network->channel)) {
+ netdev_info(ieee->dev,
+ "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
+ network->channel);
+ goto free_network;
+ }
+ }
+
+ /* The network parsed correctly -- so now we scan our known networks
+ * to see if we can find it in our list.
+ *
+ * NOTE: This search is definitely not optimized. Once its doing
+ * the "right thing" we'll optimize it for efficiency if
+ * necessary
+ */
+
+ /* Search for this entry in the list and update it if it is
+ * already there.
+ */
+
+ spin_lock_irqsave(&ieee->lock, flags);
+ if (is_same_network(&ieee->current_network, network,
+ (network->ssid_len ? 1 : 0))) {
+ update_network(&ieee->current_network, network);
+ if ((ieee->current_network.mode == IEEE_N_24G ||
+ ieee->current_network.mode == IEEE_G)
+ && ieee->current_network.berp_info_valid) {
+ if (ieee->current_network.erp_value & ERP_UseProtection)
+ ieee->current_network.buseprotection = true;
+ else
+ ieee->current_network.buseprotection = false;
+ }
+ if (is_beacon(beacon->header.frame_ctl)) {
+ if (ieee->state >= RTLLIB_LINKED)
+ ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
+ }
+ }
+ list_for_each_entry(target, &ieee->network_list, list) {
+ if (is_same_network(target, network,
+ (target->ssid_len ? 1 : 0)))
+ break;
+ if ((oldest == NULL) ||
+ (target->last_scanned < oldest->last_scanned))
+ oldest = target;
+ }
+
+ /* If we didn't find a match, then get a new network slot to initialize
+ * with this beacon's information
+ */
+ if (&target->list == &ieee->network_list) {
+ if (list_empty(&ieee->network_free_list)) {
+ /* If there are no more slots, expire the oldest */
+ list_del(&oldest->list);
+ target = oldest;
+ RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from network list.\n",
+ escape_essid(target->ssid,
+ target->ssid_len),
+ target->bssid);
+ } else {
+ /* Otherwise just pull from the free list */
+ target = list_entry(ieee->network_free_list.next,
+ struct rtllib_network, list);
+ list_del(ieee->network_free_list.next);
+ }
+
+
+ RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
+ escape_essid(network->ssid,
+ network->ssid_len), network->bssid,
+ WLAN_FC_GET_STYPE(
+ le16_to_cpu(beacon->header.frame_ctl)) ==
+ RTLLIB_STYPE_PROBE_RESP ?
+ "PROBE RESPONSE" : "BEACON");
+ memcpy(target, network, sizeof(*target));
+ list_add_tail(&target->list, &ieee->network_list);
+ if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
+ rtllib_softmac_new_net(ieee, network);
+ } else {
+ RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
+ escape_essid(target->ssid,
+ target->ssid_len), target->bssid,
+ WLAN_FC_GET_STYPE(
+ le16_to_cpu(beacon->header.frame_ctl)) ==
+ RTLLIB_STYPE_PROBE_RESP ?
+ "PROBE RESPONSE" : "BEACON");
+
+ /* we have an entry and we are going to update it. But this
+ * entry may be already expired. In this case we do the same
+ * as we found a new net and call the new_net handler
+ */
+ renew = !time_after(target->last_scanned + ieee->scan_age,
+ jiffies);
+ if ((!target->ssid_len) &&
+ (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
+ || ((ieee->current_network.ssid_len == network->ssid_len) &&
+ (strncmp(ieee->current_network.ssid, network->ssid,
+ network->ssid_len) == 0) &&
+ (ieee->state == RTLLIB_NOLINK))))
+ renew = 1;
+ update_network(target, network);
+ if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
+ rtllib_softmac_new_net(ieee, network);
+ }
+
+ spin_unlock_irqrestore(&ieee->lock, flags);
+ if (is_beacon(beacon->header.frame_ctl) &&
+ is_same_network(&ieee->current_network, network,
+ (network->ssid_len ? 1 : 0)) &&
+ (ieee->state == RTLLIB_LINKED)) {
+ if (ieee->handle_beacon != NULL)
+ ieee->handle_beacon(ieee->dev, beacon,
+ &ieee->current_network);
+ }
+free_network:
+ kfree(network);
+}
+
+void rtllib_rx_mgt(struct rtllib_device *ieee,
+ struct sk_buff *skb,
+ struct rtllib_rx_stats *stats)
+{
+ struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
+
+ if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
+ RTLLIB_STYPE_PROBE_RESP) &&
+ (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
+ RTLLIB_STYPE_BEACON))
+ ieee->last_rx_ps_time = jiffies;
+
+ switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
+
+ case RTLLIB_STYPE_BEACON:
+ RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
+ WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
+ RTLLIB_DEBUG_SCAN("Beacon\n");
+ rtllib_process_probe_response(
+ ieee, (struct rtllib_probe_response *)header,
+ stats);
+
+ if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
+ ieee->iw_mode == IW_MODE_INFRA &&
+ ieee->state == RTLLIB_LINKED))
+ tasklet_schedule(&ieee->ps_task);
+
+ break;
+
+ case RTLLIB_STYPE_PROBE_RESP:
+ RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
+ WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
+ RTLLIB_DEBUG_SCAN("Probe response\n");
+ rtllib_process_probe_response(ieee,
+ (struct rtllib_probe_response *)header, stats);
+ break;
+ case RTLLIB_STYPE_PROBE_REQ:
+ RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
+ WLAN_FC_GET_STYPE(
+ le16_to_cpu(header->frame_ctl)));
+ RTLLIB_DEBUG_SCAN("Probe request\n");
+ if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
+ ((ieee->iw_mode == IW_MODE_ADHOC ||
+ ieee->iw_mode == IW_MODE_MASTER) &&
+ ieee->state == RTLLIB_LINKED))
+ rtllib_rx_probe_rq(ieee, skb);
+ break;
+ }
+}
Code Review / kvmfornfv.git / blobdiff