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