/* * 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 * * Copyright (c) 2002-2003, Jouni Malinen * 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 A special thanks goes to Realtek for their support ! ******************************************************************************/ #include //#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ieee80211.h" #ifdef ENABLE_DOT11D #include "dot11d.h" #endif static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee, struct sk_buff *skb, struct ieee80211_rx_stats *rx_stats) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; u16 fc = le16_to_cpu(hdr->frame_ctl); skb->dev = ieee->dev; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22) skb_reset_mac_header(skb); #else skb->mac.raw = skb->data; #endif 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 *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_3addr_QOS *hdr_3addr_QoS; struct ieee80211_hdr_QOS *hdr_4addr_QoS; u8 tid; #ifdef _RTL8187_EXT_PATCH_ if(ieee->iw_mode == ieee->iw_ext_mode) { tid = (hdr->addr2[ETH_ALEN-2] ^ hdr->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID; } else #endif if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr; tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; tid = UP2AC(tid); tid ++; } else if (IEEE80211_QOS_HAS_SEQ(fc)) { hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr; tid = le16_to_cpu(hdr_3addr_QoS->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) + 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 *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_3addr_QOS *hdr_3addr_QoS; struct ieee80211_hdr_QOS *hdr_4addr_QoS; u8 tid; #ifdef _RTL8187_EXT_PATCH_ if(ieee->iw_mode == ieee->iw_ext_mode) { tid = (hdr->addr2[ETH_ALEN-2] ^ hdr->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID; } else #endif if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)hdr; tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; tid = UP2AC(tid); tid ++; } else if (IEEE80211_QOS_HAS_SEQ(fc)) { hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS *)hdr; tid = le16_to_cpu(hdr_3addr_QoS->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 *hdr; // cheat the the hdr type hdr = (struct ieee80211_hdr *)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 *)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; #ifdef NOT_YET if (ieee->iw_mode == IW_MODE_MASTER) { printk(KERN_DEBUG "%s: Master mode not yet suppported.\n", ieee->dev->name); return 0; /* hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr *) skb->data);*/ } if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) { if (stype == WLAN_FC_STYPE_BEACON && ieee->iw_mode == IW_MODE_MASTER) { struct sk_buff *skb2; /* Process beacon frames also in kernel driver to * update STA(AP) table statistics */ skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2) hostap_rx(skb2->dev, skb2, rx_stats); } /* send management frames to the user space daemon for * processing */ ieee->apdevstats.rx_packets++; ieee->apdevstats.rx_bytes += skb->len; prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); return 0; } if (ieee->iw_mode == IW_MODE_MASTER) { if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) { printk(KERN_DEBUG "%s: unknown management frame " "(type=0x%02x, stype=0x%02x) dropped\n", skb->dev->name, type, stype); return -1; } hostap_rx(skb->dev, skb, rx_stats); return 0; } printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame " "received in non-Host AP mode\n", skb->dev->name); return -1; #endif } /* 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 *hdr; u8 *pos; if (skb->len < 24) return 0; hdr = (struct ieee80211_hdr *) 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 *hdr; int res, hdrlen; if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL) return 0; hdr = (struct ieee80211_hdr *) skb->data; #ifdef _RTL8187_EXT_PATCH_ if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen)) { hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb); } else #endif 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 " MAC_FMT "\n", ieee->dev->name, MAC_ARG(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=" MAC_FMT ") res=%d\n", MAC_ARG(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 *hdr; int res, hdrlen; if (crypt == NULL || crypt->ops->decrypt_msdu == NULL) return 0; hdr = (struct ieee80211_hdr *) skb->data; #ifdef _RTL8187_EXT_PATCH_ if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen)) { hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb); } else #endif 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=" MAC_FMT " keyidx=%d)\n", ieee->dev->name, MAC_ARG(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 *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_3addr_QOS *hdr_3addr_QoS; struct ieee80211_hdr_QOS *hdr_4addr_QoS; u8 tid; #ifdef _RTL8187_EXT_PATCH_ if(ieee->iw_mode == ieee->iw_ext_mode) { tid = (header->addr2[ETH_ALEN-2] ^ header->addr2[ETH_ALEN-1]) & IEEE80211_QOS_TID; } else #endif //TO2DS and QoS if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) { hdr_4addr_QoS = (struct ieee80211_hdr_QOS *)header; tid = le16_to_cpu(hdr_4addr_QoS->QOS_ctl) & IEEE80211_QOS_TID; tid = UP2AC(tid); tid ++; } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS hdr_3addr_QoS = (struct ieee80211_hdr_3addr_QOS*)header; tid = le16_to_cpu(hdr_3addr_QoS->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: #ifdef _RTL8187_EXT_PATCH_ if(ieee->iw_mode == ieee->iw_ext_mode) { last_seq = &ieee->last_rxseq_num[tid]; last_frag = &ieee->last_rxfrag_num[tid]; last_time = &ieee->last_packet_time[tid]; break; } else #endif 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_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 *hdr; //struct ieee80211_hdr_3addr_QOS *hdr; size_t hdrlen; u16 fc, type, stype, sc; struct net_device_stats *stats; unsigned int frag; u8 *payload; u16 ethertype; #ifdef NOT_YET struct net_device *wds = NULL; struct sk_buff *skb2 = NULL; struct net_device *wds = NULL; int frame_authorized = 0; int from_assoc_ap = 0; void *sta = NULL; #endif // u16 QOS_ctl = 0; u8 dst[ETH_ALEN]; u8 src[ETH_ALEN]; u8 bssid[ETH_ALEN]; struct ieee80211_crypt_data *crypt = NULL; int keyidx = 0; //Added for mesh by Lawrence. #ifdef _RTL8187_EXT_PATCH_ u8 status; u32 flags; #endif // cheat the the hdr type hdr = (struct ieee80211_hdr *)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 #ifdef _RTL8187_EXT_PATCH_ if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_rx_frame_get_hdrlen)) { hdrlen = ieee->ext_patch_ieee80211_rx_frame_get_hdrlen(ieee, skb); if(skb->len < hdrlen) goto rx_dropped; } else #endif hdrlen = ieee80211_get_hdrlen(fc); #ifdef NOT_YET #if WIRELESS_EXT > 15 /* Put this code here so that we avoid duplicating it in all * Rx paths. - Jean II */ #ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */ /* If spy monitoring on */ if (iface->spy_data.spy_number > 0) { struct iw_quality wstats; wstats.level = rx_stats->signal; wstats.noise = rx_stats->noise; wstats.updated = 6; /* No qual value */ /* Update spy records */ wireless_spy_update(dev, hdr->addr2, &wstats); } #endif /* IW_WIRELESS_SPY */ #endif /* WIRELESS_EXT > 15 */ hostap_update_rx_stats(local->ap, hdr, rx_stats); #endif #if WIRELESS_EXT > 15 if (ieee->iw_mode == IW_MODE_MONITOR) { ieee80211_monitor_rx(ieee, skb, rx_stats); stats->rx_packets++; stats->rx_bytes += skb->len; return 1; } #endif if (ieee->host_decrypt) { int idx = 0; if (skb->len >= hdrlen + 3) idx = skb->data[hdrlen + 3] >> 6; crypt = ieee->crypt[idx]; #ifdef NOT_YET sta = NULL; /* Use station specific key to override default keys if the * receiver address is a unicast address ("individual RA"). If * bcrx_sta_key parameter is set, station specific key is used * even with broad/multicast targets (this is against IEEE * 802.11, but makes it easier to use different keys with * stations that do not support WEP key mapping). */ if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key) (void) hostap_handle_sta_crypto(local, hdr, &crypt, &sta); #endif /* 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=" MAC_FMT ")\n", MAC_ARG(hdr->addr2)); ieee->ieee_stats.rx_discards_undecryptable++; goto rx_dropped; } } if (skb->len < IEEE80211_DATA_HDR3_LEN) goto rx_dropped; #ifdef _RTL8187_EXT_PATCH_ if( ieee->iw_mode == ieee->iw_ext_mode && ieee->ext_patch_ieee80211_rx_mgt_update_expire ) ieee->ext_patch_ieee80211_rx_mgt_update_expire( ieee, skb ); #endif // 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 0 if ( stype == IEEE80211_STYPE_AUTH && fc & IEEE80211_FCTL_WEP && ieee->host_decrypt && (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) { printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth " "from " MAC_FMT "\n", dev->name, MAC_ARG(hdr->addr2)); /* TODO: could inform hostapd about this so that it * could send auth failure report */ goto rx_dropped; } #endif if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) goto rx_dropped; else goto rx_exit; } #ifdef _RTL8187_EXT_PATCH_ if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_on_rx) { if(ieee->ext_patch_ieee80211_rx_on_rx(ieee, skb, rx_stats, type, stype)==0) { goto rx_exit; } } #endif /* 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; } #ifdef NOT_YET if (hostap_rx_frame_wds(ieee, hdr, fc, &wds)) goto rx_dropped; if (wds) { skb->dev = dev = wds; stats = hostap_get_stats(dev); } if (ieee->iw_mode == IW_MODE_MASTER && !wds && (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS && ieee->stadev && memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) { /* Frame from BSSID of the AP for which we are a client */ skb->dev = dev = ieee->stadev; stats = hostap_get_stats(dev); from_assoc_ap = 1; } #endif dev->last_rx = jiffies; #ifdef NOT_YET if ((ieee->iw_mode == IW_MODE_MASTER || ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) { switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats, wds != NULL)) { case AP_RX_CONTINUE_NOT_AUTHORIZED: frame_authorized = 0; break; case AP_RX_CONTINUE: frame_authorized = 1; break; case AP_RX_DROP: goto rx_dropped; case AP_RX_EXIT: goto rx_exit; } } #endif #ifdef _RTL8187_EXT_PATCH_ if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_is_valid_framectl) { if(ieee->ext_patch_ieee80211_rx_is_valid_framectl(ieee, fc, type, stype)==0) goto rx_dropped; } else #endif /* 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 *) 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 *) 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 *) 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=" MAC_FMT ")\n", MAC_ARG(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 " MAC_FMT " (drop_unencrypted=1)\n", MAC_ARG(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]; #ifdef NOT_YET /* If IEEE 802.1X is used, check whether the port is authorized to send * the received frame. */ if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) { if (ethertype == ETH_P_PAE) { printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n", dev->name); if (ieee->hostapd && ieee->apdev) { /* Send IEEE 802.1X frames to the user * space daemon for processing */ prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT); ieee->apdevstats.rx_packets++; ieee->apdevstats.rx_bytes += skb->len; goto rx_exit; } } else if (!frame_authorized) { printk(KERN_DEBUG "%s: dropped frame from " "unauthorized port (IEEE 802.1X): " "ethertype=0x%04x\n", dev->name, ethertype); goto rx_dropped; } } #endif #ifdef _RTL8187_EXT_PATCH_ if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_rx_process_dataframe) { //Added for mesh rx interrupt. //spin_lock_irqsave(&ieee->lock,flags); status = ieee->ext_patch_ieee80211_rx_process_dataframe(ieee, skb, rx_stats); //spin_unlock_irqrestore(&ieee->lock,flags); if(status) // if(ieee->ext_patch_ieee80211_rx_process_dataframe(ieee, skb, rx_stats)) goto rx_exit; else goto rx_dropped; } #endif /* 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); } #ifdef NOT_YET if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) { /* Non-standard frame: get addr4 from its bogus location after * the payload */ memcpy(skb->data + ETH_ALEN, skb->data + skb->len - ETH_ALEN, ETH_ALEN); skb_trim(skb, skb->len - ETH_ALEN); } #endif stats->rx_packets++; stats->rx_bytes += skb->len; #ifdef NOT_YET if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) { if (dst[0] & 0x01) { /* copy multicast frame both to the higher layers and * to the wireless media */ ieee->ap->bridged_multicast++; skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2 == NULL) printk(KERN_DEBUG "%s: skb_clone failed for " "multicast frame\n", dev->name); } else if (hostap_is_sta_assoc(ieee->ap, dst)) { /* send frame directly to the associated STA using * wireless media and not passing to higher layers */ ieee->ap->bridged_unicast++; skb2 = skb; skb = NULL; } } if (skb2 != NULL) { /* send to wireless media */ skb2->protocol = __constant_htons(ETH_P_802_3); skb2->mac.raw = skb2->nh.raw = skb2->data; /* skb2->nh.raw = skb2->data + ETH_HLEN; */ skb2->dev = dev; dev_queue_xmit(skb2); } #endif 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: #ifdef NOT_YET if (sta) hostap_handle_sta_release(sta); #endif 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; } #ifdef _RTL8187_EXT_PATCH_ int ieee_ext_skb_p80211_to_ether(struct sk_buff *skb, int hdrlen, u8 *dst, u8 *src) { u8 *payload; u16 ethertype; /* 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); } return 1; } #endif // _RTL8187_EXT_PATCH_ #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; } #ifdef ENABLE_DOT11D static inline void ieee80211_extract_country_ie( struct ieee80211_device *ieee, struct ieee80211_info_element *info_element, struct ieee80211_network *network, u8 * addr2 ) { #if 0 u32 i = 0; u8 * p = (u8*)info_element->data; printk("-----------------------\n"); printk("%s Country IE:", network->ssid); for(i=0; ilen; i++) printk("\t%2.2x", *(p+i)); printk("\n-----------------------\n"); #endif 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); } } } #endif 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 #ifdef THOMAS_TURBO network->Turbo_Enable = 0; #endif #ifdef ENABLE_DOT11D network->CountryIeLen = 0; memset(network->CountryIeBuf, 0, MAX_IE_LEN); #endif 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; #if 0 network->last_dtim_sta_time[0] = stats->mac_time[0]; #else network->last_dtim_sta_time[0] = jiffies; #endif 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); } #ifdef THOMAS_TURBO 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; } #endif 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; #ifdef ENABLE_DOT11D 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; #endif 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 (" MAC_FMT ")' " "network.\n", escape_essid(network->ssid, network->ssid_len), MAC_ARG(network->bssid)); return 1; } if (ieee80211_is_empty_essid(network->ssid, network->ssid_len)) network->flags |= NETWORK_EMPTY_ESSID; #if 0 stats->signal = ieee80211_SignalStrengthTranslate(stats->signal); #endif 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 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[1].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; #ifdef THOMAS_TURBO dst->Turbo_Enable = src->Turbo_Enable; #endif #ifdef ENABLE_DOT11D dst->CountryIeLen = src->CountryIeLen; memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); #endif } 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)); //rz #ifdef _RTL8187_EXT_PATCH_ if((ieee->iw_mode == ieee->iw_ext_mode) && ieee->ext_patch_ieee80211_process_probe_response_1) { ieee->ext_patch_ieee80211_process_probe_response_1(ieee, beacon, stats); return; } #endif IEEE80211_DEBUG_SCAN( "'%s' (" MAC_FMT "): %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), MAC_ARG(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 0 if(strcmp(escape_essid(beacon->info_element.data, beacon->info_element.len), "rtl_softap") == 0) { if(WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON) { u32 i = 0, len = stats->len; u8 * p = (u8*)beacon; printk("-----------------------\n"); printk("rtl_softap Beacon:"); for(i=0; idata, info_element->len), MAC_ARG(beacon->header.addr3), WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP ? "PROBE RESPONSE" : "BEACON"); return; } #ifdef ENABLE_DOT11D // 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; } } } } #endif /* 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' (" MAC_FMT ") from " "network list.\n", escape_essid(target->ssid, target->ssid_len), MAC_ARG(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' (" MAC_FMT ") via %s.\n", escape_essid(network.ssid, network.ssid_len), MAC_ARG(network.bssid), WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP ? "PROBE RESPONSE" : "BEACON"); #endif #ifdef _RTL8187_EXT_PATCH_ network.ext_entry = target->ext_entry; #endif memcpy(target, &network, sizeof(*target)); list_add_tail(&target->list, &ieee->network_list); if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) ieee80211_softmac_new_net(ieee,&network); } else { IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n", escape_essid(target->ssid, target->ssid_len), MAC_ARG(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); if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) ieee80211_softmac_new_net(ieee,&network); } spin_unlock_irqrestore(&ieee->lock, flags); } void ieee80211_rx_mgt(struct ieee80211_device *ieee, struct ieee80211_hdr *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; //rz #ifdef _RTL8187_EXT_PATCH_ case IEEE80211_STYPE_PROBE_REQ: IEEE80211_DEBUG_MGMT("received PROBE REQUEST (%d)\n", WLAN_FC_GET_STYPE(header->frame_ctl)); IEEE80211_DEBUG_SCAN("Probe request\n"); /// if( ieee->iw_mode == ieee->iw_ext_mode && ieee->ext_patch_ieee80211_rx_mgt_on_probe_req ) ieee->ext_patch_ieee80211_rx_mgt_on_probe_req( ieee, (struct ieee80211_probe_request *)header, stats); break; #endif // _RTL8187_EXT_PATCH_ } } #if 0 EXPORT_SYMBOL(ieee80211_rx_mgt); EXPORT_SYMBOL(ieee80211_rx); EXPORT_SYMBOL(ieee80211_network_init); #ifdef _RTL8187_EXT_PATCH_ EXPORT_SYMBOL(ieee_ext_skb_p80211_to_ether); #endif #endif