diff options
Diffstat (limited to 'drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c')
| -rw-r--r-- | drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c | 1491 |
1 files changed, 1491 insertions, 0 deletions
diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c new file mode 100644 index 00000000..e3031599 --- /dev/null +++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_rx.c @@ -0,0 +1,1491 @@ +/* + * 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 <andreamrl@tiscali.it> + + A special thanks goes to Realtek for their support ! + +******************************************************************************/ + + +#include <linux/compiler.h> +//#include <linux/config.h> +#include <linux/errno.h> +#include <linux/if_arp.h> +#include <linux/in6.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/pci.h> +#include <linux/proc_fs.h> +#include <linux/skbuff.h> +#include <linux/slab.h> +#include <linux/tcp.h> +#include <linux/types.h> +#include <linux/wireless.h> +#include <linux/etherdevice.h> +#include <linux/uaccess.h> +#include <linux/ctype.h> + +#include "ieee80211.h" +#include "dot11d.h" +static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee, + struct sk_buff *skb, + struct ieee80211_rx_stats *rx_stats) +{ + struct ieee80211_hdr_4addr *hdr = + (struct ieee80211_hdr_4addr *)skb->data; + u16 fc = le16_to_cpu(hdr->frame_ctl); + + skb->dev = ieee->dev; + skb_reset_mac_header(skb); + skb_pull(skb, ieee80211_get_hdrlen(fc)); + skb->pkt_type = PACKET_OTHERHOST; + skb->protocol = __constant_htons(ETH_P_80211_RAW); + memset(skb->cb, 0, sizeof(skb->cb)); + netif_rx(skb); +} + + +/* Called only as a tasklet (software IRQ) */ +static struct ieee80211_frag_entry * +ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq, + unsigned int frag, u8 tid, u8 *src, u8 *dst) +{ + struct ieee80211_frag_entry *entry; + int i; + + for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) { + entry = &ieee->frag_cache[tid][i]; + if (entry->skb != NULL && + time_after(jiffies, entry->first_frag_time + 2 * HZ)) { + IEEE80211_DEBUG_FRAG( + "expiring fragment cache entry " + "seq=%u last_frag=%u\n", + entry->seq, entry->last_frag); + dev_kfree_skb_any(entry->skb); + entry->skb = NULL; + } + + if (entry->skb != 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 * +ieee80211_frag_cache_get(struct ieee80211_device *ieee, + struct ieee80211_hdr_4addr *hdr) +{ + struct sk_buff *skb = NULL; + u16 fc = le16_to_cpu(hdr->frame_ctl); + u16 sc = le16_to_cpu(hdr->seq_ctl); + unsigned int frag = WLAN_GET_SEQ_FRAG(sc); + unsigned int seq = WLAN_GET_SEQ_SEQ(sc); + struct ieee80211_frag_entry *entry; + struct ieee80211_hdr_3addrqos *hdr_3addrqos; + struct ieee80211_hdr_4addrqos *hdr_4addrqos; + u8 tid; + + if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) { + hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr; + tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID; + tid = UP2AC(tid); + tid++; + } else if (IEEE80211_QOS_HAS_SEQ(fc)) { + hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr; + tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_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 ieee80211_hdr_4addr) + + 8 /* LLC */ + + 2 /* alignment */ + + 8 /* WEP */ + + ETH_ALEN /* WDS */ + + (IEEE80211_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] >= IEEE80211_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 = ieee80211_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 ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee, + struct ieee80211_hdr_4addr *hdr) +{ + u16 fc = le16_to_cpu(hdr->frame_ctl); + u16 sc = le16_to_cpu(hdr->seq_ctl); + unsigned int seq = WLAN_GET_SEQ_SEQ(sc); + struct ieee80211_frag_entry *entry; + struct ieee80211_hdr_3addrqos *hdr_3addrqos; + struct ieee80211_hdr_4addrqos *hdr_4addrqos; + u8 tid; + + if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) { + hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr; + tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID; + tid = UP2AC(tid); + tid++; + } else if (IEEE80211_QOS_HAS_SEQ(fc)) { + hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr; + tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID; + tid = UP2AC(tid); + tid++; + } else { + tid = 0; + } + + entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2, + hdr->addr1); + + if (entry == NULL) { + IEEE80211_DEBUG_FRAG( + "could not invalidate fragment cache " + "entry (seq=%u)\n", seq); + return -1; + } + + entry->skb = NULL; + return 0; +} + + + +/* ieee80211_rx_frame_mgtmt + * + * Responsible for handling management control frames + * + * Called by ieee80211_rx */ +static inline int +ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb, + struct ieee80211_rx_stats *rx_stats, u16 type, + u16 stype) +{ + struct ieee80211_hdr_4addr *hdr; + + // cheat the the hdr type + hdr = (struct ieee80211_hdr_4addr *)skb->data; + + /* On the struct stats definition there is written that + * this is not mandatory.... but seems that the probe + * response parser uses it + */ + rx_stats->len = skb->len; + ieee80211_rx_mgt(ieee, (struct ieee80211_hdr_4addr *)skb->data, + rx_stats); + + if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) { + dev_kfree_skb_any(skb); + return 0; + } + + ieee80211_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 ieee80211_rx_frame_decrypt */ +static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee, + struct sk_buff *skb, size_t hdrlen) +{ + struct net_device *dev = ieee->dev; + u16 fc, ethertype; + struct ieee80211_hdr_4addr *hdr; + u8 *pos; + + if (skb->len < 24) + return 0; + + hdr = (struct ieee80211_hdr_4addr *)skb->data; + fc = le16_to_cpu(hdr->frame_ctl); + + /* check that the frame is unicast frame to us */ + if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == + IEEE80211_FCTL_TODS && + memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && + memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { + /* ToDS frame with own addr BSSID and DA */ + } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == + IEEE80211_FCTL_FROMDS && + memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { + /* FromDS frame with own addr as DA */ + } else + return 0; + + if (skb->len < 24 + 8) + return 0; + + /* check for port access entity Ethernet type */ +// pos = skb->data + 24; + pos = skb->data + hdrlen; + ethertype = (pos[6] << 8) | pos[7]; + if (ethertype == ETH_P_PAE) + return 1; + + return 0; +} + +/* Called only as a tasklet (software IRQ), by ieee80211_rx */ +static inline int +ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb, + struct ieee80211_crypt_data *crypt) +{ + struct ieee80211_hdr_4addr *hdr; + int res, hdrlen; + + if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) + return 0; + + hdr = (struct ieee80211_hdr_4addr *)skb->data; + hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); + +#ifdef CONFIG_IEEE80211_CRYPT_TKIP + if (ieee->tkip_countermeasures && + strcmp(crypt->ops->name, "TKIP") == 0) { + if (net_ratelimit()) { + netdev_dbg(ieee->dev, + "TKIP countermeasures: dropped received packet from %pM\n", + ieee->dev->name, hdr->addr2); + } + return -1; + } +#endif + + atomic_inc(&crypt->refcnt); + res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); + atomic_dec(&crypt->refcnt); + if (res < 0) { + IEEE80211_DEBUG_DROP( + "decryption failed (SA=%pM" + ") res=%d\n", hdr->addr2, res); + if (res == -2) + IEEE80211_DEBUG_DROP("Decryption failed ICV " + "mismatch (key %d)\n", + skb->data[hdrlen + 3] >> 6); + ieee->ieee_stats.rx_discards_undecryptable++; + return -1; + } + + return res; +} + + +/* Called only as a tasklet (software IRQ), by ieee80211_rx */ +static inline int +ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb, + int keyidx, struct ieee80211_crypt_data *crypt) +{ + struct ieee80211_hdr_4addr *hdr; + int res, hdrlen; + + if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) + return 0; + + hdr = (struct ieee80211_hdr_4addr *)skb->data; + hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl)); + + atomic_inc(&crypt->refcnt); + res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); + atomic_dec(&crypt->refcnt); + if (res < 0) { + netdev_dbg(ieee->dev, + "MSDU decryption/MIC verification failed (SA=%pM keyidx=%d)\n", + hdr->addr2, keyidx); + return -1; + } + + return 0; +} + + +/* this function is stolen from ipw2200 driver*/ +#define IEEE_PACKET_RETRY_TIME (5*HZ) +static int is_duplicate_packet(struct ieee80211_device *ieee, + struct ieee80211_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 ieee80211_hdr_3addrqos *hdr_3addrqos; + struct ieee80211_hdr_4addrqos *hdr_4addrqos; + u8 tid; + + //TO2DS and QoS + if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) { + hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header; + tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID; + tid = UP2AC(tid); + tid++; + } else if (IEEE80211_QOS_HAS_SEQ(fc)) { //QoS + hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)header; + tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID; + tid = UP2AC(tid); + tid++; + } else { // no QoS + tid = 0; + } + switch (ieee->iw_mode) { + case IW_MODE_ADHOC: + { + struct list_head *p; + struct ieee_ibss_seq *entry = NULL; + u8 *mac = header->addr2; + int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE; + //for (pos = (head)->next; pos != (head); pos = pos->next) + __list_for_each(p, &ieee->ibss_mac_hash[index]) { + entry = list_entry(p, struct ieee_ibss_seq, list); + if (!memcmp(entry->mac, mac, ETH_ALEN)) + break; + } + // if (memcmp(entry->mac, mac, ETH_ALEN)){ + if (p == &ieee->ibss_mac_hash[index]) { + entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC); + if (!entry) + return 0; + + memcpy(entry->mac, mac, ETH_ALEN); + entry->seq_num[tid] = seq; + entry->frag_num[tid] = frag; + entry->packet_time[tid] = jiffies; + list_add(&entry->list, &ieee->ibss_mac_hash[index]); + return 0; + } + last_seq = &entry->seq_num[tid]; + last_frag = &entry->frag_num[tid]; + last_time = &entry->packet_time[tid]; + break; + } + + case IW_MODE_INFRA: + last_seq = &ieee->last_rxseq_num[tid]; + last_frag = &ieee->last_rxfrag_num[tid]; + last_time = &ieee->last_packet_time[tid]; + + break; + default: + return 0; + } + +// if(tid != 0) { +// printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl); +// } + if ((*last_seq == seq) && + time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { + if (*last_frag == frag) { + //printk(KERN_WARNING "[1] go drop!\n"); + goto drop; + + } + if (*last_frag + 1 != frag) + /* out-of-order fragment */ + //printk(KERN_WARNING "[2] go drop!\n"); + goto drop; + } else + *last_seq = seq; + + *last_frag = frag; + *last_time = jiffies; + return 0; + +drop: +// BUG_ON(!(fc & IEEE80211_FCTL_RETRY)); +// printk("DUP\n"); + + return 1; +} + + +/* All received frames are sent to this function. @skb contains the frame in + * IEEE 802.11 format, i.e., in the format it was sent over air. + * This function is called only as a tasklet (software IRQ). */ +int ieee80211_rtl_rx(struct ieee80211_device *ieee, struct sk_buff *skb, + struct ieee80211_rx_stats *rx_stats) +{ + struct net_device *dev = ieee->dev; + //struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev); + struct ieee80211_hdr_4addr *hdr; + + size_t hdrlen; + u16 fc, type, stype, sc; + struct net_device_stats *stats; + unsigned int frag; + u8 *payload; + u16 ethertype; + u8 dst[ETH_ALEN]; + u8 src[ETH_ALEN]; + u8 bssid[ETH_ALEN]; + struct ieee80211_crypt_data *crypt = NULL; + int keyidx = 0; + + // cheat the the hdr type + hdr = (struct ieee80211_hdr_4addr *)skb->data; + stats = &ieee->stats; + + if (skb->len < 10) { + netdev_info(ieee->dev, "SKB length < 10\n"); + goto rx_dropped; + } + + fc = le16_to_cpu(hdr->frame_ctl); + type = WLAN_FC_GET_TYPE(fc); + stype = WLAN_FC_GET_STYPE(fc); + sc = le16_to_cpu(hdr->seq_ctl); + + frag = WLAN_GET_SEQ_FRAG(sc); + +//YJ,add,080828,for keep alive + if ((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS) { + if (!memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) + ieee->NumRxUnicast++; + } else { + if (!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) + ieee->NumRxUnicast++; + } +//YJ,add,080828,for keep alive,end + + hdrlen = ieee80211_get_hdrlen(fc); + + + if (ieee->iw_mode == IW_MODE_MONITOR) { + ieee80211_monitor_rx(ieee, skb, rx_stats); + stats->rx_packets++; + stats->rx_bytes += skb->len; + return 1; + } + + if (ieee->host_decrypt) { + int idx = 0; + if (skb->len >= hdrlen + 3) + idx = skb->data[hdrlen + 3] >> 6; + crypt = ieee->crypt[idx]; + + /* 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 & IEEE80211_FCTL_WEP)) { + /* This seems to be triggered by some (multicast?) + * frames from other than current BSS, so just drop the + * frames silently instead of filling system log with + * these reports. */ + IEEE80211_DEBUG_DROP("Decryption failed (not set)" + " (SA=%pM)\n", + hdr->addr2); + ieee->ieee_stats.rx_discards_undecryptable++; + goto rx_dropped; + } + } + + if (skb->len < IEEE80211_DATA_HDR3_LEN) + goto rx_dropped; + + // if QoS enabled, should check the sequence for each of the AC + if (is_duplicate_packet(ieee, hdr)) + goto rx_dropped; + + + if (type == IEEE80211_FTYPE_MGMT) { + if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) + goto rx_dropped; + else + goto rx_exit; + } + + /* Data frame - extract src/dst addresses */ + switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { + case IEEE80211_FCTL_FROMDS: + memcpy(dst, hdr->addr1, ETH_ALEN); + memcpy(src, hdr->addr3, ETH_ALEN); + memcpy(bssid, hdr->addr2, ETH_ALEN); + break; + case IEEE80211_FCTL_TODS: + memcpy(dst, hdr->addr3, ETH_ALEN); + memcpy(src, hdr->addr2, ETH_ALEN); + memcpy(bssid, hdr->addr1, ETH_ALEN); + break; + case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: + if (skb->len < IEEE80211_DATA_HDR4_LEN) + goto rx_dropped; + memcpy(dst, hdr->addr3, ETH_ALEN); + memcpy(src, hdr->addr4, ETH_ALEN); + memcpy(bssid, ieee->current_network.bssid, ETH_ALEN); + break; + case 0: + memcpy(dst, hdr->addr1, ETH_ALEN); + memcpy(src, hdr->addr2, ETH_ALEN); + memcpy(bssid, hdr->addr3, ETH_ALEN); + break; + } + + + dev->last_rx = jiffies; + + + /* Nullfunc frames may have PS-bit set, so they must be passed to + * hostap_handle_sta_rx() before being dropped here. */ + if (stype != IEEE80211_STYPE_DATA && + stype != IEEE80211_STYPE_DATA_CFACK && + stype != IEEE80211_STYPE_DATA_CFPOLL && + stype != IEEE80211_STYPE_DATA_CFACKPOLL && + stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4 + ) { + if (stype != IEEE80211_STYPE_NULLFUNC) + IEEE80211_DEBUG_DROP( + "RX: dropped data frame " + "with no data (type=0x%02x, " + "subtype=0x%02x, len=%d)\n", + type, stype, skb->len); + goto rx_dropped; + } + if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) + goto rx_dropped; + + ieee->NumRxDataInPeriod++; + ieee->NumRxOkTotal++; + /* skb: hdr + (possibly fragmented, possibly encrypted) payload */ + + if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && + (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) + goto rx_dropped; + + hdr = (struct ieee80211_hdr_4addr *)skb->data; + + /* skb: hdr + (possibly fragmented) plaintext payload */ + // PR: FIXME: hostap has additional conditions in the "if" below: + // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && + if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { + int flen; + struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr); + IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag); + + if (!frag_skb) { + IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG, + "Rx cannot get skb from fragment " + "cache (morefrag=%d seq=%u frag=%u)\n", + (fc & IEEE80211_FCTL_MOREFRAGS) != 0, + WLAN_GET_SEQ_SEQ(sc), frag); + goto rx_dropped; + } + flen = skb->len; + if (frag != 0) + flen -= hdrlen; + + if (frag_skb->tail + flen > frag_skb->end) { + netdev_warn(ieee->dev, + "host decrypted and reassembled frame did not fit skb\n"); + ieee80211_frag_cache_invalidate(ieee, hdr); + goto rx_dropped; + } + + if (frag == 0) { + /* copy first fragment (including full headers) into + * beginning of the fragment cache skb */ + 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 & IEEE80211_FCTL_MOREFRAGS) { + /* more fragments expected - leave the skb in fragment + * cache for now; it will be delivered to upper layers + * after all fragments have been received */ + goto rx_exit; + } + + /* this was the last fragment and the frame will be + * delivered, so remove skb from fragment cache */ + skb = frag_skb; + hdr = (struct ieee80211_hdr_4addr *)skb->data; + ieee80211_frag_cache_invalidate(ieee, hdr); + } + + /* skb: hdr + (possible reassembled) full MSDU payload; possibly still + * encrypted/authenticated */ + if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) && + ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) + goto rx_dropped; + + hdr = (struct ieee80211_hdr_4addr *)skb->data; + if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) { + if (/*ieee->ieee802_1x &&*/ + ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { + +#ifdef CONFIG_IEEE80211_DEBUG + /* pass unencrypted EAPOL frames even if encryption is + * configured */ + struct eapol *eap = (struct eapol *)(skb->data + + 24); + IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", + eap_get_type(eap->type)); +#endif + } else { + IEEE80211_DEBUG_DROP( + "encryption configured, but RX " + "frame not encrypted (SA=%pM)\n", + hdr->addr2); + goto rx_dropped; + } + } + +#ifdef CONFIG_IEEE80211_DEBUG + if (crypt && !(fc & IEEE80211_FCTL_WEP) && + ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { + struct eapol *eap = (struct eapol *)(skb->data + + 24); + IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n", + eap_get_type(eap->type)); + } +#endif + + if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep && + !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { + IEEE80211_DEBUG_DROP( + "dropped unencrypted RX data " + "frame from %pM" + " (drop_unencrypted=1)\n", + hdr->addr2); + goto rx_dropped; + } +/* + if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) { + printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n"); + } +*/ + /* skb: hdr + (possible reassembled) full plaintext payload */ + payload = skb->data + hdrlen; + ethertype = (payload[6] << 8) | payload[7]; + + + /* convert hdr + possible LLC headers into Ethernet header */ + if (skb->len - hdrlen >= 8 && + ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 && + ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || + memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) { + /* remove RFC1042 or Bridge-Tunnel encapsulation and + * replace EtherType */ + skb_pull(skb, hdrlen + SNAP_SIZE); + memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); + memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); + } else { + u16 len; + /* Leave Ethernet header part of hdr and full payload */ + skb_pull(skb, hdrlen); + len = htons(skb->len); + memcpy(skb_push(skb, 2), &len, 2); + memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); + memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); + } + + + stats->rx_packets++; + stats->rx_bytes += skb->len; + + if (skb) { + skb->protocol = eth_type_trans(skb, dev); + memset(skb->cb, 0, sizeof(skb->cb)); + skb->dev = dev; + skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ + ieee->last_rx_ps_time = jiffies; + netif_rx(skb); + } + + rx_exit: + return 1; + + rx_dropped: + 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; +} + +#define MGMT_FRAME_FIXED_PART_LENGTH 0x24 + +static inline int ieee80211_is_ofdm_rate(u8 rate) +{ + switch (rate & ~IEEE80211_BASIC_RATE_MASK) { + case IEEE80211_OFDM_RATE_6MB: + case IEEE80211_OFDM_RATE_9MB: + case IEEE80211_OFDM_RATE_12MB: + case IEEE80211_OFDM_RATE_18MB: + case IEEE80211_OFDM_RATE_24MB: + case IEEE80211_OFDM_RATE_36MB: + case IEEE80211_OFDM_RATE_48MB: + case IEEE80211_OFDM_RATE_54MB: + return 1; + } + return 0; +} + +static inline int ieee80211_SignalStrengthTranslate( + int CurrSS + ) +{ + int RetSS; + + // Step 1. Scale mapping. + if (CurrSS >= 71 && CurrSS <= 100) + RetSS = 90 + ((CurrSS - 70) / 3); + else if (CurrSS >= 41 && CurrSS <= 70) + RetSS = 78 + ((CurrSS - 40) / 3); + else if (CurrSS >= 31 && CurrSS <= 40) + RetSS = 66 + (CurrSS - 30); + else if (CurrSS >= 21 && CurrSS <= 30) + RetSS = 54 + (CurrSS - 20); + else if (CurrSS >= 5 && CurrSS <= 20) + RetSS = 42 + (((CurrSS - 5) * 2) / 3); + else if (CurrSS == 4) + RetSS = 36; + else if (CurrSS == 3) + RetSS = 27; + else if (CurrSS == 2) + RetSS = 18; + else if (CurrSS == 1) + RetSS = 9; + else + RetSS = CurrSS; + + //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); + + // Step 2. Smoothing. + + //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing: LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS)); + + return RetSS; +} + +static inline void ieee80211_extract_country_ie( + struct ieee80211_device *ieee, + struct ieee80211_info_element *info_element, + struct ieee80211_network *network, + u8 *addr2 +) +{ + if (IS_DOT11D_ENABLE(ieee)) { + if (info_element->len != 0) { + memcpy(network->CountryIeBuf, info_element->data, info_element->len); + network->CountryIeLen = info_element->len; + + if (!IS_COUNTRY_IE_VALID(ieee)) + Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data); + } + + // + // 070305, rcnjko: I update country IE watch dog here because + // some AP (e.g. Cisco 1242) don't include country IE in their + // probe response frame. + // + if (IS_EQUAL_CIE_SRC(ieee, addr2)) + UPDATE_CIE_WATCHDOG(ieee); + } + +} + +int +ieee80211_TranslateToDbm( + unsigned char SignalStrengthIndex // 0-100 index. + ) +{ + unsigned char SignalPower; // in dBm. + + // Translate to dBm (x=0.5y-95). + SignalPower = (int)SignalStrengthIndex * 7 / 10; + SignalPower -= 95; + + return SignalPower; +} +inline int ieee80211_network_init( + struct ieee80211_device *ieee, + struct ieee80211_probe_response *beacon, + struct ieee80211_network *network, + struct ieee80211_rx_stats *stats) +{ +#ifdef CONFIG_IEEE80211_DEBUG + char rates_str[64]; + char *p; +#endif + struct ieee80211_info_element *info_element; + u16 left; + u8 i; + short offset; + u8 curRate = 0, hOpRate = 0, curRate_ex = 0; + + /* Pull out fixed field data */ + memcpy(network->bssid, beacon->header.addr3, ETH_ALEN); + network->capability = 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 = beacon->beacon_interval; + /* Where to pull this? beacon->listen_interval;*/ + network->listen_interval = 0x0A; + network->rates_len = network->rates_ex_len = 0; + network->last_associate = 0; + network->ssid_len = 0; + network->flags = 0; + network->atim_window = 0; + network->QoS_Enable = 0; +//by amy 080312 + network->HighestOperaRate = 0; +//by amy 080312 + network->Turbo_Enable = 0; + network->CountryIeLen = 0; + memset(network->CountryIeBuf, 0, MAX_IE_LEN); + + if (stats->freq == IEEE80211_52GHZ_BAND) { + /* for A band (No DS info) */ + network->channel = stats->received_channel; + } else + network->flags |= NETWORK_HAS_CCK; + + network->wpa_ie_len = 0; + network->rsn_ie_len = 0; + + info_element = &beacon->info_element; + left = stats->len - ((void *)info_element - (void *)beacon); + while (left >= sizeof(struct ieee80211_info_element_hdr)) { + if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) { + IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n", + info_element->len + sizeof(struct ieee80211_info_element), + left); + return 1; + } + + switch (info_element->id) { + case MFIE_TYPE_SSID: + if (ieee80211_is_empty_essid(info_element->data, + info_element->len)) { + network->flags |= NETWORK_EMPTY_ESSID; + break; + } + + network->ssid_len = min(info_element->len, + (u8)IW_ESSID_MAX_SIZE); + memcpy(network->ssid, info_element->data, network->ssid_len); + if (network->ssid_len < IW_ESSID_MAX_SIZE) + memset(network->ssid + network->ssid_len, 0, + IW_ESSID_MAX_SIZE - network->ssid_len); + + IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n", + network->ssid, network->ssid_len); + break; + + case MFIE_TYPE_RATES: +#ifdef CONFIG_IEEE80211_DEBUG + p = rates_str; +#endif + network->rates_len = min(info_element->len, MAX_RATES_LENGTH); + for (i = 0; i < network->rates_len; i++) { + network->rates[i] = info_element->data[i]; + curRate = network->rates[i] & 0x7f; + if (hOpRate < curRate) + hOpRate = curRate; +#ifdef CONFIG_IEEE80211_DEBUG + p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]); +#endif + if (ieee80211_is_ofdm_rate(info_element->data[i])) { + network->flags |= NETWORK_HAS_OFDM; + if (info_element->data[i] & + IEEE80211_BASIC_RATE_MASK) + network->flags &= + ~NETWORK_HAS_CCK; + } + } + + IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n", + rates_str, network->rates_len); + break; + + case MFIE_TYPE_RATES_EX: +#ifdef CONFIG_IEEE80211_DEBUG + p = rates_str; +#endif + network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH); + for (i = 0; i < network->rates_ex_len; i++) { + network->rates_ex[i] = info_element->data[i]; + curRate_ex = network->rates_ex[i] & 0x7f; + if (hOpRate < curRate_ex) + hOpRate = curRate_ex; +#ifdef CONFIG_IEEE80211_DEBUG + p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]); +#endif + if (ieee80211_is_ofdm_rate(info_element->data[i])) { + network->flags |= NETWORK_HAS_OFDM; + if (info_element->data[i] & + IEEE80211_BASIC_RATE_MASK) + network->flags &= + ~NETWORK_HAS_CCK; + } + } + + IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n", + rates_str, network->rates_ex_len); + break; + + case MFIE_TYPE_DS_SET: + IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n", + info_element->data[0]); + if (stats->freq == IEEE80211_24GHZ_BAND) + network->channel = info_element->data[0]; + break; + + case MFIE_TYPE_FH_SET: + IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n"); + break; + + case MFIE_TYPE_CF_SET: + IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n"); + break; + + case MFIE_TYPE_TIM: + + if (info_element->len < 4) + break; + + network->dtim_period = info_element->data[1]; + + if (ieee->state != IEEE80211_LINKED) + break; + + network->last_dtim_sta_time[0] = jiffies; + network->last_dtim_sta_time[1] = stats->mac_time[1]; + + network->dtim_data = IEEE80211_DTIM_VALID; + + if (info_element->data[0] != 0) + break; + + if (info_element->data[2] & 1) + network->dtim_data |= IEEE80211_DTIM_MBCAST; + + offset = (info_element->data[2] >> 1)*2; + + //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id); + + /* add and modified for ps 2008.1.22 */ + if (ieee->assoc_id < 8*offset || + ieee->assoc_id > 8*(offset + info_element->len - 3)) { + break; + } + + offset = (ieee->assoc_id/8) - offset;// + ((aid % 8)? 0 : 1) ; + + // printk("offset:%x data:%x, ucast:%d\n", offset, + // info_element->data[3+offset] , + // info_element->data[3+offset] & (1<<(ieee->assoc_id%8))); + + if (info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) + network->dtim_data |= IEEE80211_DTIM_UCAST; + + break; + + case MFIE_TYPE_IBSS_SET: + IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n"); + break; + + case MFIE_TYPE_CHALLENGE: + IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n"); + break; + + case MFIE_TYPE_GENERIC: + //nic is 87B + IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n", + info_element->len); + 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); + } + + 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 (1 == stats->nic_type) //nic 87 + break; + + if (info_element->len >= 5 && + info_element->data[0] == 0x00 && + info_element->data[1] == 0x50 && + info_element->data[2] == 0xf2 && + info_element->data[3] == 0x02 && + info_element->data[4] == 0x00) { + //printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]); + //WMM Information Element + network->wmm_info = info_element->data[6]; + network->QoS_Enable = 1; + } + + if (info_element->len >= 8 && + info_element->data[0] == 0x00 && + info_element->data[1] == 0x50 && + info_element->data[2] == 0xf2 && + info_element->data[3] == 0x02 && + info_element->data[4] == 0x01) { + // Not care about version at present. + //WMM Information Element + //printk(KERN_WARNING "wmm info¶m updated: %x\n", info_element->data[6]); + network->wmm_info = info_element->data[6]; + //WMM Parameter Element + memcpy(network->wmm_param, (u8 *)(info_element->data + 8), (info_element->len - 8)); + network->QoS_Enable = 1; + } + break; + + case MFIE_TYPE_RSN: + IEEE80211_DEBUG_SCAN("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_COUNTRY: + IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n", + info_element->len); +// printk("=====>Receive <%s> Country IE\n",network->ssid); + ieee80211_extract_country_ie(ieee, info_element, network, beacon->header.addr2); + break; + default: + IEEE80211_DEBUG_SCAN("unsupported IE %d\n", + info_element->id); + break; + } + + left -= sizeof(struct ieee80211_info_element_hdr) + + info_element->len; + info_element = (struct ieee80211_info_element *) + &info_element->data[info_element->len]; + } +//by amy 080312 + network->HighestOperaRate = hOpRate; +//by amy 080312 + network->mode = 0; + if (stats->freq == IEEE80211_52GHZ_BAND) + network->mode = IEEE_A; + else { + if (network->flags & NETWORK_HAS_OFDM) + network->mode |= IEEE_G; + if (network->flags & NETWORK_HAS_CCK) + network->mode |= IEEE_B; + } + + if (network->mode == 0) { + IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' " + "network.\n", + escape_essid(network->ssid, + network->ssid_len), + network->bssid); + return 1; + } + + if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) + network->flags |= NETWORK_EMPTY_ESSID; + + stats->signal = ieee80211_TranslateToDbm(stats->signalstrength); + //stats->noise = stats->signal - stats->noise; + stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25; + memcpy(&network->stats, stats, sizeof(network->stats)); + + return 0; +} + +static inline int is_same_network(struct ieee80211_network *src, + struct ieee80211_network *dst, + struct ieee80211_device *ieee) +{ + /* A network is only a duplicate if the channel, BSSID, ESSID + * and the capability field (in particular IBSS and BSS) all match. + * We treat all <hidden> with the same BSSID and channel + * as one network */ + return (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap + //((src->ssid_len == dst->ssid_len) && + (src->channel == dst->channel) && + !memcmp(src->bssid, dst->bssid, ETH_ALEN) && + (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap + //!memcmp(src->ssid, dst->ssid, src->ssid_len) && + ((src->capability & WLAN_CAPABILITY_IBSS) == + (dst->capability & WLAN_CAPABILITY_IBSS)) && + ((src->capability & WLAN_CAPABILITY_BSS) == + (dst->capability & WLAN_CAPABILITY_BSS))); +} + +inline void update_network(struct ieee80211_network *dst, + struct ieee80211_network *src) +{ + unsigned char quality = src->stats.signalstrength; + unsigned char signal = 0; + unsigned char noise = 0; + if (dst->stats.signalstrength > 0) + quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6; + signal = ieee80211_TranslateToDbm(quality); + //noise = signal - src->stats.noise; + if (dst->stats.noise > 0) + noise = (dst->stats.noise * 5 + src->stats.noise)/6; + //if(strcmp(dst->ssid, "linksys_lzm000") == 0) +// printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal); + memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats)); + dst->stats.signalstrength = quality; + dst->stats.signal = signal; +// printk("==================>stats.signal is %d\n",dst->stats.signal); + dst->stats.noise = noise; + + + 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; + dst->HighestOperaRate = src->HighestOperaRate; + //printk("==========>in %s: src->ssid is %s,chan is %d\n",__func__,src->ssid,src->channel); + + //YJ,add,080819,for hidden ap + if (src->ssid_len > 0) { + //if(src->ssid_len == 13) + // printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid); + memset(dst->ssid, 0, dst->ssid_len); + dst->ssid_len = src->ssid_len; + memcpy(dst->ssid, src->ssid, src->ssid_len); + } + //YJ,add,080819,for hidden ap,end + + dst->channel = src->channel; + dst->mode = src->mode; + dst->flags = src->flags; + dst->time_stamp[0] = src->time_stamp[0]; + dst->time_stamp[1] = src->time_stamp[1]; + + dst->beacon_interval = src->beacon_interval; + dst->listen_interval = src->listen_interval; + dst->atim_window = src->atim_window; + dst->dtim_period = src->dtim_period; + dst->dtim_data = src->dtim_data; + dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0]; + dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1]; +// printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data); + memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); + dst->wpa_ie_len = src->wpa_ie_len; + memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); + dst->rsn_ie_len = src->rsn_ie_len; + + dst->last_scanned = jiffies; + /* dst->last_associate is not overwritten */ +// disable QoS process now, added by David 2006/7/25 +#if 1 + dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame. +/* + if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter + memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN); + } +*/ + 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->QoS_Enable = src->QoS_Enable; +#else + dst->QoS_Enable = 1;//for Rtl8187 simulation +#endif + dst->SignalStrength = src->SignalStrength; + dst->Turbo_Enable = src->Turbo_Enable; + dst->CountryIeLen = src->CountryIeLen; + memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); +} + + +inline void ieee80211_process_probe_response( + struct ieee80211_device *ieee, + struct ieee80211_probe_response *beacon, + struct ieee80211_rx_stats *stats) +{ + struct ieee80211_network network; + struct ieee80211_network *target; + struct ieee80211_network *oldest = NULL; +#ifdef CONFIG_IEEE80211_DEBUG + struct ieee80211_info_element *info_element = &beacon->info_element; +#endif + unsigned long flags; + short renew; + u8 wmm_info; + u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON) ? 1 : 0; //YJ,add,080819,for hidden ap + + memset(&network, 0, sizeof(struct ieee80211_network)); + + IEEE80211_DEBUG_SCAN( + "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", + escape_essid(info_element->data, info_element->len), + beacon->header.addr3, + (beacon->capability & (1<<0xf)) ? '1' : '0', + (beacon->capability & (1<<0xe)) ? '1' : '0', + (beacon->capability & (1<<0xd)) ? '1' : '0', + (beacon->capability & (1<<0xc)) ? '1' : '0', + (beacon->capability & (1<<0xb)) ? '1' : '0', + (beacon->capability & (1<<0xa)) ? '1' : '0', + (beacon->capability & (1<<0x9)) ? '1' : '0', + (beacon->capability & (1<<0x8)) ? '1' : '0', + (beacon->capability & (1<<0x7)) ? '1' : '0', + (beacon->capability & (1<<0x6)) ? '1' : '0', + (beacon->capability & (1<<0x5)) ? '1' : '0', + (beacon->capability & (1<<0x4)) ? '1' : '0', + (beacon->capability & (1<<0x3)) ? '1' : '0', + (beacon->capability & (1<<0x2)) ? '1' : '0', + (beacon->capability & (1<<0x1)) ? '1' : '0', + (beacon->capability & (1<<0x0)) ? '1' : '0'); + + if (ieee80211_network_init(ieee, beacon, &network, stats)) { + IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n", + escape_essid(info_element->data, + info_element->len), + beacon->header.addr3, + WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == + IEEE80211_STYPE_PROBE_RESP ? + "PROBE RESPONSE" : "BEACON"); + return; + } + + // For Asus EeePc request, + // (1) if wireless adapter receive get any 802.11d country code in AP beacon, + // wireless adapter should follow the country code. + // (2) If there is no any country code in beacon, + // then wireless adapter should do active scan from ch1~11 and + // passive scan from ch12~14 + if (ieee->bGlobalDomain) { + if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP) { + // Case 1: Country code + if (IS_COUNTRY_IE_VALID(ieee)) { + if (!IsLegalChannel(ieee, network.channel)) { + printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel); + return; + } + } + // Case 2: No any country code. + else { + // Filter over channel ch12~14 + if (network.channel > 11) { + printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel); + return; + } + } + } else { + // Case 1: Country code + if (IS_COUNTRY_IE_VALID(ieee)) { + if (!IsLegalChannel(ieee, network.channel)) { + printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network.channel); + return; + } + } + // Case 2: No any country code. + else { + // Filter over channel ch12~14 + if (network.channel > 14) { + printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network.channel); + return; + } + } + } + } + /* The network parsed correctly -- so now we scan our known networks + * to see if we can find it in our list. + * + * NOTE: This search is definitely not optimized. Once its doing + * the "right thing" we'll optimize it for efficiency if + * necessary */ + + /* Search for this entry in the list and update it if it is + * already there. */ + + spin_lock_irqsave(&ieee->lock, flags); + + if (is_same_network(&ieee->current_network, &network, ieee)) { + wmm_info = ieee->current_network.wmm_info; + //YJ,add,080819,for hidden ap + if (is_beacon == 0) + network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags); + else if (ieee->state == IEEE80211_LINKED) + ieee->NumRxBcnInPeriod++; + //YJ,add,080819,for hidden ap,end + //printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid); + update_network(&ieee->current_network, &network); + } + + list_for_each_entry(target, &ieee->network_list, list) { + if (is_same_network(target, &network, ieee)) + 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; + IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from " + "network list.\n", + escape_essid(target->ssid, + target->ssid_len), + target->bssid); + } else { + /* Otherwise just pull from the free list */ + target = list_entry(ieee->network_free_list.next, + struct ieee80211_network, list); + list_del(ieee->network_free_list.next); + } + + +#ifdef CONFIG_IEEE80211_DEBUG + IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n", + escape_essid(network.ssid, + network.ssid_len), + network.bssid, + WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == + IEEE80211_STYPE_PROBE_RESP ? + "PROBE RESPONSE" : "BEACON"); +#endif + + memcpy(target, &network, sizeof(*target)); + list_add_tail(&target->list, &ieee->network_list); + } else { + IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n", + escape_essid(target->ssid, + target->ssid_len), + target->bssid, + WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == + IEEE80211_STYPE_PROBE_RESP ? + "PROBE RESPONSE" : "BEACON"); + + /* we have an entry and we are going to update it. But this entry may + * be already expired. In this case we do the same as we found a new + * net and call the new_net handler + */ + renew = !time_after(target->last_scanned + ieee->scan_age, jiffies); + //YJ,add,080819,for hidden ap + if (is_beacon == 0) + network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags); + //if(strncmp(network.ssid, "linksys-c",9) == 0) + // printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags); + if (((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \ + && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\ + || ((ieee->current_network.ssid_len == network.ssid_len) && (strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK)))) + renew = 1; + //YJ,add,080819,for hidden ap,end + update_network(target, &network); + } + + spin_unlock_irqrestore(&ieee->lock, flags); +} + +void ieee80211_rx_mgt(struct ieee80211_device *ieee, + struct ieee80211_hdr_4addr *header, + struct ieee80211_rx_stats *stats) +{ + switch (WLAN_FC_GET_STYPE(header->frame_ctl)) { + + case IEEE80211_STYPE_BEACON: + IEEE80211_DEBUG_MGMT("received BEACON (%d)\n", + WLAN_FC_GET_STYPE(header->frame_ctl)); + IEEE80211_DEBUG_SCAN("Beacon\n"); + ieee80211_process_probe_response( + ieee, (struct ieee80211_probe_response *)header, stats); + break; + + case IEEE80211_STYPE_PROBE_RESP: + IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n", + WLAN_FC_GET_STYPE(header->frame_ctl)); + IEEE80211_DEBUG_SCAN("Probe response\n"); + ieee80211_process_probe_response( + ieee, (struct ieee80211_probe_response *)header, stats); + break; + } +} |