--- /dev/null
+/******************************************************************************
+
+ 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.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc., 59
+ Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ 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,x=1 data+ack | DS | DS |frag | | mgm |data | |
+ * '-----------------------------------------------------------------------------------------'
+ * /\
+ * |
+ * 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 };
+
+inline 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);
+ ieee->ieee_stats.tx_discards++;
+ 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;
+
+ RTLLIB_DEBUG_DATA(RTLLIB_DL_DATA, skb->data, skb->len);
+ 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;
+ }
+}
+
+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;
+}
+
+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
+ };
+ u8 dest[ETH_ALEN], src[ETH_ALEN];
+ int qos_actived = ieee->current_network.qos_data.active;
+ 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 */
+ memcpy(dest, skb->data, ETH_ALEN);
+ memcpy(src, skb->data+ETH_ALEN, 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 (ETH_P_IP == ether_type) {
+ const struct iphdr *ip = (struct iphdr *)
+ ((u8 *)skb->data+14);
+ if (IPPROTO_UDP == ip->protocol) {
+ 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 (ETH_P_ARP == ether_type) {
+ 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));
+ RTLLIB_DEBUG_EAP("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
+ */
+ memcpy(&header.addr1, ieee->current_network.bssid,
+ ETH_ALEN);
+ memcpy(&header.addr2, &src, ETH_ALEN);
+ if (IsAmsdu)
+ memcpy(&header.addr3,
+ ieee->current_network.bssid, ETH_ALEN);
+ else
+ memcpy(&header.addr3, &dest, ETH_ALEN);
+ } else if (ieee->iw_mode == IW_MODE_ADHOC) {
+ /* not From/To DS: Addr1 = DA, Addr2 = SA,
+ * Addr3 = BSSID
+ */
+ memcpy(&header.addr1, dest, ETH_ALEN);
+ memcpy(&header.addr2, src, ETH_ALEN);
+ memcpy(&header.addr3, ieee->current_network.bssid,
+ ETH_ALEN);
+ }
+
+ 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);
Code Review / kvmfornfv.git / blobdiff