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- /******************************************************************************
- Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.
- This program is free software; you can redistribute it and/or modify it
- under the terms of version 2 of the GNU General Public License as
- published by the Free Software Foundation.
- This program is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- more details.
- The full GNU General Public License is included in this distribution in the
- file called LICENSE.
- Contact Information:
- James P. Ketrenos <ipw2100-admin@linux.intel.com>
- Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- ******************************************************************************
- 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/if_vlan.h>
- #include "rtllib.h"
- /* 802.11 Data Frame
- *
- *
- * 802.11 frame_control for data frames - 2 bytes
- * ,--------------------------------------------------------------------.
- * bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e |
- * |---|---|---|---|---|---|---|---|---|----|----|-----|-----|-----|----|
- * val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x |
- * |---|---|---|---|---|---|---|---|---|----|----|-----|-----|-----|----|
- * desc | ver | type | ^-subtype-^ |to |from|more|retry| pwr |more |wep |
- * | | | x=0 data |DS | DS |frag| | mgm |data | |
- * | | | x=1 data+ack | | | | | | | |
- * '--------------------------------------------------------------------'
- * /\
- * |
- * 802.11 Data Frame |
- * ,--------- 'ctrl' expands to >---'
- * |
- * ,--'---,-------------------------------------------------------------.
- * Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 |
- * |------|------|---------|---------|---------|------|---------|------|
- * Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
- * | | tion | (BSSID) | | | ence | data | |
- * `--------------------------------------------------| |------'
- * Total: 28 non-data bytes `----.----'
- * |
- * .- 'Frame data' expands to <---------------------------'
- * |
- * V
- * ,---------------------------------------------------.
- * Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
- * |------|------|---------|----------|------|---------|
- * Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
- * | DSAP | SSAP | | | | Packet |
- * | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
- * `-----------------------------------------| |
- * Total: 8 non-data bytes `----.----'
- * |
- * .- 'IP Packet' expands, if WEP enabled, to <--'
- * |
- * V
- * ,-----------------------.
- * Bytes | 4 | 0-2296 | 4 |
- * |-----|-----------|-----|
- * Desc. | IV | Encrypted | ICV |
- * | | IP Packet | |
- * `-----------------------'
- * Total: 8 non-data bytes
- *
- *
- * 802.3 Ethernet Data Frame
- *
- * ,-----------------------------------------.
- * Bytes | 6 | 6 | 2 | Variable | 4 |
- * |-------|-------|------|-----------|------|
- * Desc. | Dest. | Source| Type | IP Packet | fcs |
- * | MAC | MAC | | | |
- * `-----------------------------------------'
- * Total: 18 non-data bytes
- *
- * In the event that fragmentation is required, the incoming payload is split
- * into N parts of size ieee->fts. The first fragment contains the SNAP header
- * and the remaining packets are just data.
- *
- * If encryption is enabled, each fragment payload size is reduced by enough
- * space to add the prefix and postfix (IV and ICV totalling 8 bytes in
- * the case of WEP) So if you have 1500 bytes of payload with ieee->fts set to
- * 500 without encryption it will take 3 frames. With WEP it will take 4 frames
- * as the payload of each frame is reduced to 492 bytes.
- *
- * SKB visualization
- *
- * ,- skb->data
- * |
- * | ETHERNET HEADER ,-<-- PAYLOAD
- * | | 14 bytes from skb->data
- * | 2 bytes for Type --> ,T. | (sizeof ethhdr)
- * | | | |
- * |,-Dest.--. ,--Src.---. | | |
- * | 6 bytes| | 6 bytes | | | |
- * v | | | | | |
- * 0 | v 1 | v | v 2
- * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
- * ^ | ^ | ^ |
- * | | | | | |
- * | | | | `T' <---- 2 bytes for Type
- * | | | |
- * | | '---SNAP--' <-------- 6 bytes for SNAP
- * | |
- * `-IV--' <-------------------- 4 bytes for IV (WEP)
- *
- * SNAP HEADER
- *
- */
- static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 };
- static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 };
- static int rtllib_put_snap(u8 *data, u16 h_proto)
- {
- struct rtllib_snap_hdr *snap;
- u8 *oui;
- snap = (struct rtllib_snap_hdr *)data;
- snap->dsap = 0xaa;
- snap->ssap = 0xaa;
- snap->ctrl = 0x03;
- if (h_proto == 0x8137 || h_proto == 0x80f3)
- oui = P802_1H_OUI;
- else
- oui = RFC1042_OUI;
- snap->oui[0] = oui[0];
- snap->oui[1] = oui[1];
- snap->oui[2] = oui[2];
- *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
- return SNAP_SIZE + sizeof(u16);
- }
- int rtllib_encrypt_fragment(struct rtllib_device *ieee, struct sk_buff *frag,
- int hdr_len)
- {
- struct lib80211_crypt_data *crypt = NULL;
- int res;
- crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
- if (!(crypt && crypt->ops)) {
- netdev_info(ieee->dev, "=========>%s(), crypt is null\n",
- __func__);
- return -1;
- }
- /* To encrypt, frame format is:
- * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes)
- */
- /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
- * call both MSDU and MPDU encryption functions from here.
- */
- atomic_inc(&crypt->refcnt);
- res = 0;
- if (crypt->ops->encrypt_msdu)
- res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv);
- if (res == 0 && crypt->ops->encrypt_mpdu)
- res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv);
- atomic_dec(&crypt->refcnt);
- if (res < 0) {
- netdev_info(ieee->dev, "%s: Encryption failed: len=%d.\n",
- ieee->dev->name, frag->len);
- return -1;
- }
- return 0;
- }
- void rtllib_txb_free(struct rtllib_txb *txb)
- {
- if (unlikely(!txb))
- return;
- kfree(txb);
- }
- static struct rtllib_txb *rtllib_alloc_txb(int nr_frags, int txb_size,
- gfp_t gfp_mask)
- {
- struct rtllib_txb *txb;
- int i;
- txb = kmalloc(sizeof(struct rtllib_txb) + (sizeof(u8 *) * nr_frags),
- gfp_mask);
- if (!txb)
- return NULL;
- memset(txb, 0, sizeof(struct rtllib_txb));
- txb->nr_frags = nr_frags;
- txb->frag_size = cpu_to_le16(txb_size);
- for (i = 0; i < nr_frags; i++) {
- txb->fragments[i] = dev_alloc_skb(txb_size);
- if (unlikely(!txb->fragments[i])) {
- i--;
- break;
- }
- memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb));
- }
- if (unlikely(i != nr_frags)) {
- while (i >= 0)
- dev_kfree_skb_any(txb->fragments[i--]);
- kfree(txb);
- return NULL;
- }
- return txb;
- }
- static int rtllib_classify(struct sk_buff *skb, u8 bIsAmsdu)
- {
- struct ethhdr *eth;
- struct iphdr *ip;
- eth = (struct ethhdr *)skb->data;
- if (eth->h_proto != htons(ETH_P_IP))
- return 0;
- #ifdef VERBOSE_DEBUG
- print_hex_dump_bytes("rtllib_classify(): ", DUMP_PREFIX_NONE, skb->data,
- skb->len);
- #endif
- ip = ip_hdr(skb);
- switch (ip->tos & 0xfc) {
- case 0x20:
- return 2;
- case 0x40:
- return 1;
- case 0x60:
- return 3;
- case 0x80:
- return 4;
- case 0xa0:
- return 5;
- case 0xc0:
- return 6;
- case 0xe0:
- return 7;
- default:
- return 0;
- }
- }
- static void rtllib_tx_query_agg_cap(struct rtllib_device *ieee,
- struct sk_buff *skb,
- struct cb_desc *tcb_desc)
- {
- struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
- struct tx_ts_record *pTxTs = NULL;
- struct rtllib_hdr_1addr *hdr = (struct rtllib_hdr_1addr *)skb->data;
- if (rtllib_act_scanning(ieee, false))
- return;
- if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT)
- return;
- if (!IsQoSDataFrame(skb->data))
- return;
- if (is_multicast_ether_addr(hdr->addr1))
- return;
- if (tcb_desc->bdhcp || ieee->CntAfterLink < 2)
- return;
- if (pHTInfo->IOTAction & HT_IOT_ACT_TX_NO_AGGREGATION)
- return;
- if (!ieee->GetNmodeSupportBySecCfg(ieee->dev))
- return;
- if (pHTInfo->bCurrentAMPDUEnable) {
- if (!GetTs(ieee, (struct ts_common_info **)(&pTxTs), hdr->addr1,
- skb->priority, TX_DIR, true)) {
- netdev_info(ieee->dev, "%s: can't get TS\n", __func__);
- return;
- }
- if (pTxTs->TxAdmittedBARecord.bValid == false) {
- if (ieee->wpa_ie_len && (ieee->pairwise_key_type ==
- KEY_TYPE_NA)) {
- ;
- } else if (tcb_desc->bdhcp == 1) {
- ;
- } else if (!pTxTs->bDisable_AddBa) {
- TsStartAddBaProcess(ieee, pTxTs);
- }
- goto FORCED_AGG_SETTING;
- } else if (pTxTs->bUsingBa == false) {
- if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum,
- (pTxTs->TxCurSeq+1)%4096))
- pTxTs->bUsingBa = true;
- else
- goto FORCED_AGG_SETTING;
- }
- if (ieee->iw_mode == IW_MODE_INFRA) {
- tcb_desc->bAMPDUEnable = true;
- tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor;
- tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity;
- }
- }
- FORCED_AGG_SETTING:
- switch (pHTInfo->ForcedAMPDUMode) {
- case HT_AGG_AUTO:
- break;
- case HT_AGG_FORCE_ENABLE:
- tcb_desc->bAMPDUEnable = true;
- tcb_desc->ampdu_density = pHTInfo->ForcedMPDUDensity;
- tcb_desc->ampdu_factor = pHTInfo->ForcedAMPDUFactor;
- break;
- case HT_AGG_FORCE_DISABLE:
- tcb_desc->bAMPDUEnable = false;
- tcb_desc->ampdu_density = 0;
- tcb_desc->ampdu_factor = 0;
- break;
- }
- }
- static void rtllib_qurey_ShortPreambleMode(struct rtllib_device *ieee,
- struct cb_desc *tcb_desc)
- {
- tcb_desc->bUseShortPreamble = false;
- if (tcb_desc->data_rate == 2)
- return;
- else if (ieee->current_network.capability &
- WLAN_CAPABILITY_SHORT_PREAMBLE)
- tcb_desc->bUseShortPreamble = true;
- }
- static void rtllib_query_HTCapShortGI(struct rtllib_device *ieee,
- struct cb_desc *tcb_desc)
- {
- struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
- tcb_desc->bUseShortGI = false;
- if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT)
- return;
- if (pHTInfo->bForcedShortGI) {
- tcb_desc->bUseShortGI = true;
- return;
- }
- if ((pHTInfo->bCurBW40MHz == true) && pHTInfo->bCurShortGI40MHz)
- tcb_desc->bUseShortGI = true;
- else if ((pHTInfo->bCurBW40MHz == false) && pHTInfo->bCurShortGI20MHz)
- tcb_desc->bUseShortGI = true;
- }
- static void rtllib_query_BandwidthMode(struct rtllib_device *ieee,
- struct cb_desc *tcb_desc)
- {
- struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
- tcb_desc->bPacketBW = false;
- if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT)
- return;
- if (tcb_desc->bMulticast || tcb_desc->bBroadcast)
- return;
- if ((tcb_desc->data_rate & 0x80) == 0)
- return;
- if (pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz &&
- !ieee->bandwidth_auto_switch.bforced_tx20Mhz)
- tcb_desc->bPacketBW = true;
- }
- static void rtllib_query_protectionmode(struct rtllib_device *ieee,
- struct cb_desc *tcb_desc,
- struct sk_buff *skb)
- {
- struct rt_hi_throughput *pHTInfo;
- tcb_desc->bRTSSTBC = false;
- tcb_desc->bRTSUseShortGI = false;
- tcb_desc->bCTSEnable = false;
- tcb_desc->RTSSC = 0;
- tcb_desc->bRTSBW = false;
- if (tcb_desc->bBroadcast || tcb_desc->bMulticast)
- return;
- if (is_broadcast_ether_addr(skb->data+16))
- return;
- if (ieee->mode < IEEE_N_24G) {
- if (skb->len > ieee->rts) {
- tcb_desc->bRTSEnable = true;
- tcb_desc->rts_rate = MGN_24M;
- } else if (ieee->current_network.buseprotection) {
- tcb_desc->bRTSEnable = true;
- tcb_desc->bCTSEnable = true;
- tcb_desc->rts_rate = MGN_24M;
- }
- return;
- }
- pHTInfo = ieee->pHTInfo;
- while (true) {
- if (pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF) {
- tcb_desc->bCTSEnable = true;
- tcb_desc->rts_rate = MGN_24M;
- tcb_desc->bRTSEnable = true;
- break;
- } else if (pHTInfo->IOTAction & (HT_IOT_ACT_FORCED_RTS |
- HT_IOT_ACT_PURE_N_MODE)) {
- tcb_desc->bRTSEnable = true;
- tcb_desc->rts_rate = MGN_24M;
- break;
- }
- if (ieee->current_network.buseprotection) {
- tcb_desc->bRTSEnable = true;
- tcb_desc->bCTSEnable = true;
- tcb_desc->rts_rate = MGN_24M;
- break;
- }
- if (pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT) {
- u8 HTOpMode = pHTInfo->CurrentOpMode;
- if ((pHTInfo->bCurBW40MHz && (HTOpMode == 2 ||
- HTOpMode == 3)) ||
- (!pHTInfo->bCurBW40MHz && HTOpMode == 3)) {
- tcb_desc->rts_rate = MGN_24M;
- tcb_desc->bRTSEnable = true;
- break;
- }
- }
- if (skb->len > ieee->rts) {
- tcb_desc->rts_rate = MGN_24M;
- tcb_desc->bRTSEnable = true;
- break;
- }
- if (tcb_desc->bAMPDUEnable) {
- tcb_desc->rts_rate = MGN_24M;
- tcb_desc->bRTSEnable = false;
- break;
- }
- goto NO_PROTECTION;
- }
- if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
- tcb_desc->bUseShortPreamble = true;
- if (ieee->iw_mode == IW_MODE_MASTER)
- goto NO_PROTECTION;
- return;
- NO_PROTECTION:
- tcb_desc->bRTSEnable = false;
- tcb_desc->bCTSEnable = false;
- tcb_desc->rts_rate = 0;
- tcb_desc->RTSSC = 0;
- tcb_desc->bRTSBW = false;
- }
- static void rtllib_txrate_selectmode(struct rtllib_device *ieee,
- struct cb_desc *tcb_desc)
- {
- if (ieee->bTxDisableRateFallBack)
- tcb_desc->bTxDisableRateFallBack = true;
- if (ieee->bTxUseDriverAssingedRate)
- tcb_desc->bTxUseDriverAssingedRate = true;
- if (!tcb_desc->bTxDisableRateFallBack ||
- !tcb_desc->bTxUseDriverAssingedRate) {
- if (ieee->iw_mode == IW_MODE_INFRA ||
- ieee->iw_mode == IW_MODE_ADHOC)
- tcb_desc->RATRIndex = 0;
- }
- }
- static u16 rtllib_query_seqnum(struct rtllib_device *ieee, struct sk_buff *skb,
- u8 *dst)
- {
- u16 seqnum = 0;
- if (is_multicast_ether_addr(dst))
- return 0;
- if (IsQoSDataFrame(skb->data)) {
- struct tx_ts_record *pTS = NULL;
- if (!GetTs(ieee, (struct ts_common_info **)(&pTS), dst,
- skb->priority, TX_DIR, true))
- return 0;
- seqnum = pTS->TxCurSeq;
- pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096;
- return seqnum;
- }
- return 0;
- }
- static int wme_downgrade_ac(struct sk_buff *skb)
- {
- switch (skb->priority) {
- case 6:
- case 7:
- skb->priority = 5; /* VO -> VI */
- return 0;
- case 4:
- case 5:
- skb->priority = 3; /* VI -> BE */
- return 0;
- case 0:
- case 3:
- skb->priority = 1; /* BE -> BK */
- return 0;
- default:
- return -1;
- }
- }
- static u8 rtllib_current_rate(struct rtllib_device *ieee)
- {
- if (ieee->mode & IEEE_MODE_MASK)
- return ieee->rate;
- if (ieee->HTCurrentOperaRate)
- return ieee->HTCurrentOperaRate;
- else
- return ieee->rate & 0x7F;
- }
- static int rtllib_xmit_inter(struct sk_buff *skb, struct net_device *dev)
- {
- struct rtllib_device *ieee = (struct rtllib_device *)
- netdev_priv_rsl(dev);
- struct rtllib_txb *txb = NULL;
- struct rtllib_hdr_3addrqos *frag_hdr;
- int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size;
- unsigned long flags;
- struct net_device_stats *stats = &ieee->stats;
- int ether_type = 0, encrypt;
- int bytes, fc, qos_ctl = 0, hdr_len;
- struct sk_buff *skb_frag;
- struct rtllib_hdr_3addrqos header = { /* Ensure zero initialized */
- .duration_id = 0,
- .seq_ctl = 0,
- .qos_ctl = 0
- };
- int qos_actived = ieee->current_network.qos_data.active;
- u8 dest[ETH_ALEN];
- u8 src[ETH_ALEN];
- struct lib80211_crypt_data *crypt = NULL;
- struct cb_desc *tcb_desc;
- u8 bIsMulticast = false;
- u8 IsAmsdu = false;
- bool bdhcp = false;
- spin_lock_irqsave(&ieee->lock, flags);
- /* If there is no driver handler to take the TXB, don't bother
- * creating it...
- */
- if ((!ieee->hard_start_xmit && !(ieee->softmac_features &
- IEEE_SOFTMAC_TX_QUEUE)) ||
- ((!ieee->softmac_data_hard_start_xmit &&
- (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
- netdev_warn(ieee->dev, "No xmit handler.\n");
- goto success;
- }
- if (likely(ieee->raw_tx == 0)) {
- if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) {
- netdev_warn(ieee->dev, "skb too small (%d).\n",
- skb->len);
- goto success;
- }
- /* Save source and destination addresses */
- ether_addr_copy(dest, skb->data);
- ether_addr_copy(src, skb->data + ETH_ALEN);
- memset(skb->cb, 0, sizeof(skb->cb));
- ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto);
- if (ieee->iw_mode == IW_MODE_MONITOR) {
- txb = rtllib_alloc_txb(1, skb->len, GFP_ATOMIC);
- if (unlikely(!txb)) {
- netdev_warn(ieee->dev,
- "Could not allocate TXB\n");
- goto failed;
- }
- txb->encrypted = 0;
- txb->payload_size = cpu_to_le16(skb->len);
- memcpy(skb_put(txb->fragments[0], skb->len), skb->data,
- skb->len);
- goto success;
- }
- if (skb->len > 282) {
- if (ether_type == ETH_P_IP) {
- const struct iphdr *ip = (struct iphdr *)
- ((u8 *)skb->data+14);
- if (ip->protocol == IPPROTO_UDP) {
- struct udphdr *udp;
- udp = (struct udphdr *)((u8 *)ip +
- (ip->ihl << 2));
- if (((((u8 *)udp)[1] == 68) &&
- (((u8 *)udp)[3] == 67)) ||
- ((((u8 *)udp)[1] == 67) &&
- (((u8 *)udp)[3] == 68))) {
- bdhcp = true;
- ieee->LPSDelayCnt = 200;
- }
- }
- } else if (ether_type == ETH_P_ARP) {
- netdev_info(ieee->dev,
- "=================>DHCP Protocol start tx ARP pkt!!\n");
- bdhcp = true;
- ieee->LPSDelayCnt =
- ieee->current_network.tim.tim_count;
- }
- }
- skb->priority = rtllib_classify(skb, IsAmsdu);
- crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
- encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) &&
- ieee->host_encrypt && crypt && crypt->ops;
- if (!encrypt && ieee->ieee802_1x &&
- ieee->drop_unencrypted && ether_type != ETH_P_PAE) {
- stats->tx_dropped++;
- goto success;
- }
- if (crypt && !encrypt && ether_type == ETH_P_PAE) {
- struct eapol *eap = (struct eapol *)(skb->data +
- sizeof(struct ethhdr) - SNAP_SIZE -
- sizeof(u16));
- netdev_dbg(ieee->dev,
- "TX: IEEE 802.11 EAPOL frame: %s\n",
- eap_get_type(eap->type));
- }
- /* Advance the SKB to the start of the payload */
- skb_pull(skb, sizeof(struct ethhdr));
- /* Determine total amount of storage required for TXB packets */
- bytes = skb->len + SNAP_SIZE + sizeof(u16);
- if (encrypt)
- fc = RTLLIB_FTYPE_DATA | RTLLIB_FCTL_WEP;
- else
- fc = RTLLIB_FTYPE_DATA;
- if (qos_actived)
- fc |= RTLLIB_STYPE_QOS_DATA;
- else
- fc |= RTLLIB_STYPE_DATA;
- if (ieee->iw_mode == IW_MODE_INFRA) {
- fc |= RTLLIB_FCTL_TODS;
- /* To DS: Addr1 = BSSID, Addr2 = SA,
- * Addr3 = DA
- */
- ether_addr_copy(header.addr1,
- ieee->current_network.bssid);
- ether_addr_copy(header.addr2, src);
- if (IsAmsdu)
- ether_addr_copy(header.addr3,
- ieee->current_network.bssid);
- else
- ether_addr_copy(header.addr3, dest);
- } else if (ieee->iw_mode == IW_MODE_ADHOC) {
- /* not From/To DS: Addr1 = DA, Addr2 = SA,
- * Addr3 = BSSID
- */
- ether_addr_copy(header.addr1, dest);
- ether_addr_copy(header.addr2, src);
- ether_addr_copy(header.addr3,
- ieee->current_network.bssid);
- }
- bIsMulticast = is_multicast_ether_addr(header.addr1);
- header.frame_ctl = cpu_to_le16(fc);
- /* Determine fragmentation size based on destination (multicast
- * and broadcast are not fragmented)
- */
- if (bIsMulticast) {
- frag_size = MAX_FRAG_THRESHOLD;
- qos_ctl |= QOS_CTL_NOTCONTAIN_ACK;
- } else {
- frag_size = ieee->fts;
- qos_ctl = 0;
- }
- if (qos_actived) {
- hdr_len = RTLLIB_3ADDR_LEN + 2;
- /* in case we are a client verify acm is not set for this ac */
- while (unlikely(ieee->wmm_acm & (0x01 << skb->priority))) {
- netdev_info(ieee->dev, "skb->priority = %x\n",
- skb->priority);
- if (wme_downgrade_ac(skb))
- break;
- netdev_info(ieee->dev, "converted skb->priority = %x\n",
- skb->priority);
- }
- qos_ctl |= skb->priority;
- header.qos_ctl = cpu_to_le16(qos_ctl & RTLLIB_QOS_TID);
- } else {
- hdr_len = RTLLIB_3ADDR_LEN;
- }
- /* Determine amount of payload per fragment. Regardless of if
- * this stack is providing the full 802.11 header, one will
- * eventually be affixed to this fragment -- so we must account
- * for it when determining the amount of payload space.
- */
- bytes_per_frag = frag_size - hdr_len;
- if (ieee->config &
- (CFG_RTLLIB_COMPUTE_FCS | CFG_RTLLIB_RESERVE_FCS))
- bytes_per_frag -= RTLLIB_FCS_LEN;
- /* Each fragment may need to have room for encrypting
- * pre/postfix
- */
- if (encrypt) {
- bytes_per_frag -= crypt->ops->extra_mpdu_prefix_len +
- crypt->ops->extra_mpdu_postfix_len +
- crypt->ops->extra_msdu_prefix_len +
- crypt->ops->extra_msdu_postfix_len;
- }
- /* Number of fragments is the total bytes_per_frag /
- * payload_per_fragment
- */
- nr_frags = bytes / bytes_per_frag;
- bytes_last_frag = bytes % bytes_per_frag;
- if (bytes_last_frag)
- nr_frags++;
- else
- bytes_last_frag = bytes_per_frag;
- /* When we allocate the TXB we allocate enough space for the
- * reserve and full fragment bytes (bytes_per_frag doesn't
- * include prefix, postfix, header, FCS, etc.)
- */
- txb = rtllib_alloc_txb(nr_frags, frag_size +
- ieee->tx_headroom, GFP_ATOMIC);
- if (unlikely(!txb)) {
- netdev_warn(ieee->dev, "Could not allocate TXB\n");
- goto failed;
- }
- txb->encrypted = encrypt;
- txb->payload_size = cpu_to_le16(bytes);
- if (qos_actived)
- txb->queue_index = UP2AC(skb->priority);
- else
- txb->queue_index = WME_AC_BE;
- for (i = 0; i < nr_frags; i++) {
- skb_frag = txb->fragments[i];
- tcb_desc = (struct cb_desc *)(skb_frag->cb +
- MAX_DEV_ADDR_SIZE);
- if (qos_actived) {
- skb_frag->priority = skb->priority;
- tcb_desc->queue_index = UP2AC(skb->priority);
- } else {
- skb_frag->priority = WME_AC_BE;
- tcb_desc->queue_index = WME_AC_BE;
- }
- skb_reserve(skb_frag, ieee->tx_headroom);
- if (encrypt) {
- if (ieee->hwsec_active)
- tcb_desc->bHwSec = 1;
- else
- tcb_desc->bHwSec = 0;
- skb_reserve(skb_frag,
- crypt->ops->extra_mpdu_prefix_len +
- crypt->ops->extra_msdu_prefix_len);
- } else {
- tcb_desc->bHwSec = 0;
- }
- frag_hdr = (struct rtllib_hdr_3addrqos *)
- skb_put(skb_frag, hdr_len);
- memcpy(frag_hdr, &header, hdr_len);
- /* If this is not the last fragment, then add the
- * MOREFRAGS bit to the frame control
- */
- if (i != nr_frags - 1) {
- frag_hdr->frame_ctl = cpu_to_le16(
- fc | RTLLIB_FCTL_MOREFRAGS);
- bytes = bytes_per_frag;
- } else {
- /* The last fragment has the remaining length */
- bytes = bytes_last_frag;
- }
- if ((qos_actived) && (!bIsMulticast)) {
- frag_hdr->seq_ctl =
- cpu_to_le16(rtllib_query_seqnum(ieee, skb_frag,
- header.addr1));
- frag_hdr->seq_ctl =
- cpu_to_le16(le16_to_cpu(frag_hdr->seq_ctl)<<4 | i);
- } else {
- frag_hdr->seq_ctl =
- cpu_to_le16(ieee->seq_ctrl[0]<<4 | i);
- }
- /* Put a SNAP header on the first fragment */
- if (i == 0) {
- rtllib_put_snap(
- skb_put(skb_frag, SNAP_SIZE +
- sizeof(u16)), ether_type);
- bytes -= SNAP_SIZE + sizeof(u16);
- }
- memcpy(skb_put(skb_frag, bytes), skb->data, bytes);
- /* Advance the SKB... */
- skb_pull(skb, bytes);
- /* Encryption routine will move the header forward in
- * order to insert the IV between the header and the
- * payload
- */
- if (encrypt)
- rtllib_encrypt_fragment(ieee, skb_frag,
- hdr_len);
- if (ieee->config &
- (CFG_RTLLIB_COMPUTE_FCS | CFG_RTLLIB_RESERVE_FCS))
- skb_put(skb_frag, 4);
- }
- if ((qos_actived) && (!bIsMulticast)) {
- if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF)
- ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0;
- else
- ieee->seq_ctrl[UP2AC(skb->priority) + 1]++;
- } else {
- if (ieee->seq_ctrl[0] == 0xFFF)
- ieee->seq_ctrl[0] = 0;
- else
- ieee->seq_ctrl[0]++;
- }
- } else {
- if (unlikely(skb->len < sizeof(struct rtllib_hdr_3addr))) {
- netdev_warn(ieee->dev, "skb too small (%d).\n",
- skb->len);
- goto success;
- }
- txb = rtllib_alloc_txb(1, skb->len, GFP_ATOMIC);
- if (!txb) {
- netdev_warn(ieee->dev, "Could not allocate TXB\n");
- goto failed;
- }
- txb->encrypted = 0;
- txb->payload_size = cpu_to_le16(skb->len);
- memcpy(skb_put(txb->fragments[0], skb->len), skb->data,
- skb->len);
- }
- success:
- if (txb) {
- struct cb_desc *tcb_desc = (struct cb_desc *)
- (txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
- tcb_desc->bTxEnableFwCalcDur = 1;
- tcb_desc->priority = skb->priority;
- if (ether_type == ETH_P_PAE) {
- if (ieee->pHTInfo->IOTAction &
- HT_IOT_ACT_WA_IOT_Broadcom) {
- tcb_desc->data_rate =
- MgntQuery_TxRateExcludeCCKRates(ieee);
- tcb_desc->bTxDisableRateFallBack = false;
- } else {
- tcb_desc->data_rate = ieee->basic_rate;
- tcb_desc->bTxDisableRateFallBack = 1;
- }
- tcb_desc->RATRIndex = 7;
- tcb_desc->bTxUseDriverAssingedRate = 1;
- } else {
- if (is_multicast_ether_addr(header.addr1))
- tcb_desc->bMulticast = 1;
- if (is_broadcast_ether_addr(header.addr1))
- tcb_desc->bBroadcast = 1;
- rtllib_txrate_selectmode(ieee, tcb_desc);
- if (tcb_desc->bMulticast || tcb_desc->bBroadcast)
- tcb_desc->data_rate = ieee->basic_rate;
- else
- tcb_desc->data_rate = rtllib_current_rate(ieee);
- if (bdhcp) {
- if (ieee->pHTInfo->IOTAction &
- HT_IOT_ACT_WA_IOT_Broadcom) {
- tcb_desc->data_rate =
- MgntQuery_TxRateExcludeCCKRates(ieee);
- tcb_desc->bTxDisableRateFallBack = false;
- } else {
- tcb_desc->data_rate = MGN_1M;
- tcb_desc->bTxDisableRateFallBack = 1;
- }
- tcb_desc->RATRIndex = 7;
- tcb_desc->bTxUseDriverAssingedRate = 1;
- tcb_desc->bdhcp = 1;
- }
- rtllib_qurey_ShortPreambleMode(ieee, tcb_desc);
- rtllib_tx_query_agg_cap(ieee, txb->fragments[0],
- tcb_desc);
- rtllib_query_HTCapShortGI(ieee, tcb_desc);
- rtllib_query_BandwidthMode(ieee, tcb_desc);
- rtllib_query_protectionmode(ieee, tcb_desc,
- txb->fragments[0]);
- }
- }
- spin_unlock_irqrestore(&ieee->lock, flags);
- dev_kfree_skb_any(skb);
- if (txb) {
- if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE) {
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += le16_to_cpu(txb->payload_size);
- rtllib_softmac_xmit(txb, ieee);
- } else {
- if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
- stats->tx_packets++;
- stats->tx_bytes += le16_to_cpu(txb->payload_size);
- return 0;
- }
- rtllib_txb_free(txb);
- }
- }
- return 0;
- failed:
- spin_unlock_irqrestore(&ieee->lock, flags);
- netif_stop_queue(dev);
- stats->tx_errors++;
- return 1;
- }
- int rtllib_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- memset(skb->cb, 0, sizeof(skb->cb));
- return rtllib_xmit_inter(skb, dev);
- }
- EXPORT_SYMBOL(rtllib_xmit);
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