diff options
Diffstat (limited to 'drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c')
-rw-r--r-- | drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c | 839 |
1 files changed, 0 insertions, 839 deletions
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c deleted file mode 100644 index e4b6454809..0000000000 --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c +++ /dev/null @@ -1,839 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/****************************************************************************** - * - * Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved. - * - * 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 "ieee80211.h" - - -/* - * - * - * 802.11 Data Frame - * - * - * 802.11 frame_contorl 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 }; - -static inline int ieee80211_put_snap(u8 *data, u16 h_proto) -{ - struct ieee80211_snap_hdr *snap; - u8 *oui; - - snap = (struct ieee80211_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 ieee80211_encrypt_fragment( - struct ieee80211_device *ieee, - struct sk_buff *frag, - int hdr_len) -{ - struct ieee80211_crypt_data *crypt = ieee->crypt[ieee->tx_keyidx]; - int res; - - if (!(crypt && crypt->ops)) { - printk("=========>%s(), crypt is null\n", __func__); - return -1; - } - - if (ieee->tkip_countermeasures && - crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) { - if (net_ratelimit()) { - struct rtl_80211_hdr_3addrqos *header; - - header = (struct rtl_80211_hdr_3addrqos *)frag->data; - netdev_dbg(ieee->dev, "TKIP countermeasures: dropped " - "TX packet to %pM\n", header->addr1); - } - return -1; - } - - /* To encrypt, frame format is: - * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) - */ - - // PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption. - /* 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, "Encryption failed: len=%d.\n", - frag->len); - ieee->ieee_stats.tx_discards++; - return -1; - } - - return 0; -} - - -void ieee80211_txb_free(struct ieee80211_txb *txb) -{ - //int i; - if (unlikely(!txb)) - return; - kfree(txb); -} -EXPORT_SYMBOL(ieee80211_txb_free); - -static struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size, - gfp_t gfp_mask) -{ - struct ieee80211_txb *txb; - int i; - txb = kmalloc( - sizeof(struct ieee80211_txb) + (sizeof(u8 *) * nr_frags), - gfp_mask); - if (!txb) - return NULL; - - memset(txb, 0, sizeof(struct ieee80211_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; -} - -// Classify the to-be send data packet -// Need to acquire the sent queue index. -static int -ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network) -{ - struct ethhdr *eth; - struct iphdr *ip; - eth = (struct ethhdr *)skb->data; - if (eth->h_proto != htons(ETH_P_IP)) - return 0; - - 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 ieee80211_tx_query_agg_cap(struct ieee80211_device *ieee, - struct sk_buff *skb, struct cb_desc *tcb_desc) -{ - PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; - struct tx_ts_record *pTxTs = NULL; - struct rtl_80211_hdr_1addr *hdr = (struct rtl_80211_hdr_1addr *)skb->data; - - if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT) - return; - if (!IsQoSDataFrame(skb->data)) - return; - - if (is_multicast_ether_addr(hdr->addr1)) - return; - //check packet and mode later - if (!ieee->GetNmodeSupportBySecCfg(ieee->dev)) - return; - - if (pHTInfo->bCurrentAMPDUEnable) { - if (!GetTs(ieee, (struct ts_common_info **)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true)) { - printk("===>can't get TS\n"); - return; - } - if (!pTxTs->tx_admitted_ba_record.valid) { - TsStartAddBaProcess(ieee, pTxTs); - goto FORCED_AGG_SETTING; - } else if (!pTxTs->using_ba) { - if (SN_LESS(pTxTs->tx_admitted_ba_record.start_seq_ctrl.field.seq_num, (pTxTs->tx_cur_seq + 1) % 4096)) - pTxTs->using_ba = 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; - - } - return; -} - -static void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device *ieee, - struct cb_desc *tcb_desc) -{ - tcb_desc->bUseShortPreamble = false; - if (tcb_desc->data_rate == 2) {//// 1M can only use Long Preamble. 11B spec - return; - } else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE) { - tcb_desc->bUseShortPreamble = true; - } - return; -} -static void -ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, struct cb_desc *tcb_desc) -{ - PRT_HIGH_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 && pHTInfo->bCurShortGI40MHz) - tcb_desc->bUseShortGI = true; - else if (!pHTInfo->bCurBW40MHz && pHTInfo->bCurShortGI20MHz) - tcb_desc->bUseShortGI = true; -} - -static void ieee80211_query_BandwidthMode(struct ieee80211_device *ieee, - struct cb_desc *tcb_desc) -{ - PRT_HIGH_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) // If using legacy rate, it shall use 20MHz channel. - return; - //BandWidthAutoSwitch is for auto switch to 20 or 40 in long distance - if (pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz && !ieee->bandwidth_auto_switch.bforced_tx20Mhz) - tcb_desc->bPacketBW = true; - return; -} - -static void ieee80211_query_protectionmode(struct ieee80211_device *ieee, - struct cb_desc *tcb_desc, - struct sk_buff *skb) -{ - // Common Settings - tcb_desc->bRTSSTBC = false; - tcb_desc->bRTSUseShortGI = false; // Since protection frames are always sent by legacy rate, ShortGI will never be used. - tcb_desc->bCTSEnable = false; // Most of protection using RTS/CTS - tcb_desc->RTSSC = 0; // 20MHz: Don't care; 40MHz: Duplicate. - tcb_desc->bRTSBW = false; // RTS frame bandwidth is always 20MHz - - if (tcb_desc->bBroadcast || tcb_desc->bMulticast) //only unicast frame will use rts/cts - return; - - if (is_broadcast_ether_addr(skb->data + 16)) //check addr3 as infrastructure add3 is DA. - return; - - if (ieee->mode < IEEE_N_24G) /* b, g mode */ { - // (1) RTS_Threshold is compared to the MPDU, not MSDU. - // (2) If there are more than one frag in this MSDU, only the first frag uses protection frame. - // Other fragments are protected by previous fragment. - // So we only need to check the length of first fragment. - if (skb->len > ieee->rts) { - tcb_desc->bRTSEnable = true; - tcb_desc->rts_rate = MGN_24M; - } else if (ieee->current_network.buseprotection) { - // Use CTS-to-SELF in protection mode. - tcb_desc->bRTSEnable = true; - tcb_desc->bCTSEnable = true; - tcb_desc->rts_rate = MGN_24M; - } - //otherwise return; - return; - } else { // 11n High throughput case. - PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; - while (true) { - //check ERP protection - if (ieee->current_network.buseprotection) {// CTS-to-SELF - tcb_desc->bRTSEnable = true; - tcb_desc->bCTSEnable = true; - tcb_desc->rts_rate = MGN_24M; - break; - } - //check HT op mode - 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; // Rate is 24Mbps. - tcb_desc->bRTSEnable = true; - break; - } - } - //check rts - if (skb->len > ieee->rts) { - tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps. - tcb_desc->bRTSEnable = true; - break; - } - //to do list: check MIMO power save condition. - //check AMPDU aggregation for TXOP - if (tcb_desc->bAMPDUEnable) { - tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps. - // According to 8190 design, firmware sends CF-End only if RTS/CTS is enabled. However, it degrads - // throughput around 10M, so we disable of this mechanism. 2007.08.03 by Emily - tcb_desc->bRTSEnable = false; - break; - } - //check IOT action - if (pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF) { - tcb_desc->bCTSEnable = true; - tcb_desc->rts_rate = MGN_24M; - tcb_desc->bRTSEnable = true; - break; - } - // Totally no protection case!! - goto NO_PROTECTION; - } - } - // For test , CTS replace with RTS - if (0) { - tcb_desc->bCTSEnable = true; - tcb_desc->rts_rate = MGN_24M; - tcb_desc->bRTSEnable = true; - } - if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE) - tcb_desc->bUseShortPreamble = true; - if (ieee->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 ieee80211_txrate_selectmode(struct ieee80211_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 void ieee80211_query_seqnum(struct ieee80211_device *ieee, - struct sk_buff *skb, u8 *dst) -{ - if (is_multicast_ether_addr(dst)) - return; - if (IsQoSDataFrame(skb->data)) /* we deal qos data only */ { - struct tx_ts_record *pTS = NULL; - if (!GetTs(ieee, (struct ts_common_info **)(&pTS), dst, skb->priority, TX_DIR, true)) { - return; - } - pTS->tx_cur_seq = (pTS->tx_cur_seq + 1) % 4096; - } -} - -netdev_tx_t ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct ieee80211_device *ieee = netdev_priv(dev); - struct ieee80211_txb *txb = NULL; - struct rtl_80211_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 rtl_80211_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 ieee80211_crypt_data *crypt; - - struct cb_desc *tcb_desc; - - spin_lock_irqsave(&ieee->lock, flags); - - /* If there is no driver handler to take the TXB, dont' 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; - } - - memset(skb->cb, 0, sizeof(skb->cb)); - ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); - - crypt = ieee->crypt[ieee->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; - } - #ifdef CONFIG_IEEE80211_DEBUG - if (crypt && !encrypt && ether_type == ETH_P_PAE) { - struct eapol *eap = (struct eapol *)(skb->data + - sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16)); - IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n", - eap_get_type(eap->type)); - } - #endif - - /* Save source and destination addresses */ - memcpy(&dest, skb->data, ETH_ALEN); - memcpy(&src, skb->data + ETH_ALEN, ETH_ALEN); - - /* 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 = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP; - else - - fc = IEEE80211_FTYPE_DATA; - - //if(ieee->current_network.QoS_Enable) - if (qos_actived) - fc |= IEEE80211_STYPE_QOS_DATA; - else - fc |= IEEE80211_STYPE_DATA; - - if (ieee->iw_mode == IW_MODE_INFRA) { - fc |= IEEE80211_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); - 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); - } - - header.frame_ctl = cpu_to_le16(fc); - - /* Determine fragmentation size based on destination (multicast - * and broadcast are not fragmented) - */ - if (is_multicast_ether_addr(header.addr1)) { - frag_size = MAX_FRAG_THRESHOLD; - qos_ctl |= QOS_CTL_NOTCONTAIN_ACK; - } else { - frag_size = ieee->fts;//default:392 - qos_ctl = 0; - } - - //if (ieee->current_network.QoS_Enable) - if (qos_actived) { - hdr_len = IEEE80211_3ADDR_LEN + 2; - - skb->priority = ieee80211_classify(skb, &ieee->current_network); - qos_ctl |= skb->priority; //set in the ieee80211_classify - header.qos_ctl = cpu_to_le16(qos_ctl & IEEE80211_QOS_TID); - } else { - hdr_len = IEEE80211_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_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) - bytes_per_frag -= IEEE80211_FCS_LEN; - - /* Each fragment may need to have room for encryption pre/postfix */ - if (encrypt) - bytes_per_frag -= crypt->ops->extra_prefix_len + - crypt->ops->extra_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 = ieee80211_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 (ieee->current_network.QoS_Enable) - if (qos_actived) - txb->queue_index = UP2AC(skb->priority); - else - txb->queue_index = WME_AC_BK; - - - - 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;//UP2AC(skb->priority); - tcb_desc->queue_index = UP2AC(skb->priority); - } else { - skb_frag->priority = WME_AC_BK; - tcb_desc->queue_index = WME_AC_BK; - } - 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_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 | IEEE80211_FCTL_MOREFRAGS); - bytes = bytes_per_frag; - - } else { - /* The last fragment takes the remaining length */ - bytes = bytes_last_frag; - } - //if(ieee->current_network.QoS_Enable) - if (qos_actived) { - // add 1 only indicate to corresponding seq number control 2006/7/12 - frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority) + 1] << 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) { - ieee80211_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) - ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); - if (ieee->config & - (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) - skb_put(skb_frag, 4); - } - - if (qos_actived) { - 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 rtl_80211_hdr_3addr))) { - netdev_warn(ieee->dev, "skb too small (%d).\n", - skb->len); - goto success; - } - - txb = ieee80211_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: -//WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place. - if (txb) { - tcb_desc = (struct cb_desc *)(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE); - tcb_desc->bTxEnableFwCalcDur = 1; - if (is_multicast_ether_addr(header.addr1)) - tcb_desc->bMulticast = 1; - if (is_broadcast_ether_addr(header.addr1)) - tcb_desc->bBroadcast = 1; - ieee80211_txrate_selectmode(ieee, tcb_desc); - if (tcb_desc->bMulticast || tcb_desc->bBroadcast) - tcb_desc->data_rate = ieee->basic_rate; - else - tcb_desc->data_rate = CURRENT_RATE(ieee->mode, ieee->rate, ieee->HTCurrentOperaRate); - ieee80211_qurey_ShortPreambleMode(ieee, tcb_desc); - ieee80211_tx_query_agg_cap(ieee, txb->fragments[0], tcb_desc); - ieee80211_query_HTCapShortGI(ieee, tcb_desc); - ieee80211_query_BandwidthMode(ieee, tcb_desc); - ieee80211_query_protectionmode(ieee, tcb_desc, txb->fragments[0]); - ieee80211_query_seqnum(ieee, txb->fragments[0], header.addr1); - } - spin_unlock_irqrestore(&ieee->lock, flags); - dev_kfree_skb_any(skb); - if (txb) { - if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE) { - ieee80211_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 NETDEV_TX_OK; - } - ieee80211_txb_free(txb); - } - } - - return NETDEV_TX_OK; - - failed: - spin_unlock_irqrestore(&ieee->lock, flags); - netif_stop_queue(dev); - stats->tx_errors++; - return 1; - -} |