| /* |
| * 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 <asm/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()) { |
| printk(KERN_DEBUG "%s: 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) { |
| 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 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) { |
| printk(KERN_WARNING "Cannot malloc new mac entry\n"); |
| 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) { |
| printk(KERN_INFO "%s: SKB length < 10\n", |
| dev->name); |
| 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) { |
| printk(KERN_WARNING "%s: host decrypted and " |
| "reassembled frame did not fit skb\n", |
| dev->name); |
| 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; |
| } |
| } |