| /****************************************************************************** |
| * |
| * 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_activated = 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); |
| skb_put_data(txb->fragments[0], 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_activated) |
| 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_activated) { |
| 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_activated) |
| 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_activated) { |
| 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 = skb_put_data(skb_frag, &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_activated) && (!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); |
| } |
| |
| skb_put_data(skb_frag, 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_activated) && (!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); |
| skb_put_data(txb->fragments[0], 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); |