diff options
Diffstat (limited to 'drivers/staging/rtl8192e/rtllib_rx.c')
| -rw-r--r-- | drivers/staging/rtl8192e/rtllib_rx.c | 2678 |
1 files changed, 2678 insertions, 0 deletions
diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c new file mode 100644 index 000000000..fe3e7e127 --- /dev/null +++ b/drivers/staging/rtl8192e/rtllib_rx.c @@ -0,0 +1,2678 @@ +/* + * 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; + } +} |