// SPDX-License-Identifier: GPL-2.0
/*
* Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved.
*
* Contact Information:
* James P. Ketrenos <[email protected]>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* Few modifications for Realtek's Wi-Fi drivers by
* Andrea Merello <[email protected]>
*
* 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 = kzalloc(struct_size(txb, fragments, nr_frags), gfp_mask);
if (!txb)
return NULL;
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]))
goto err_free;
memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb));
}
return txb;
err_free:
while (--i >= 0)
dev_kfree_skb_any(txb->fragments[i]);
kfree(txb);
return NULL;
}
static int rtllib_classify(struct sk_buff *skb)
{
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("%s: ", __func__, 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 *ht_info = ieee->ht_info;
struct tx_ts_record *ts = NULL;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
if (rtllib_act_scanning(ieee, false))
return;
if (!ht_info->current_ht_support || !ht_info->enable_ht)
return;
if (!is_qos_data_frame(skb->data))
return;
if (is_multicast_ether_addr(hdr->addr1))
return;
if (tcb_desc->bdhcp || ieee->cnt_after_link < 2)
return;
if (ht_info->iot_action & HT_IOT_ACT_TX_NO_AGGREGATION)
return;
if (!ieee->get_nmode_support_by_sec_cfg(ieee->dev))
return;
if (ht_info->current_ampdu_enable) {
if (!rtllib_get_ts(ieee, (struct ts_common_info **)(&ts), hdr->addr1,
skb->priority, TX_DIR, true)) {
netdev_info(ieee->dev, "%s: can't get TS\n", __func__);
return;
}
if (!ts->tx_admitted_ba_record.b_valid) {
if (ieee->wpa_ie_len && (ieee->pairwise_key_type ==
KEY_TYPE_NA)) {
;
} else if (tcb_desc->bdhcp == 1) {
;
} else if (!ts->disable_add_ba) {
rtllib_ts_start_add_ba_process(ieee, ts);
}
return;
} else if (!ts->using_ba) {
if (SN_LESS(ts->tx_admitted_ba_record.ba_start_seq_ctrl.field.seq_num,
(ts->tx_cur_seq + 1) % 4096))
ts->using_ba = true;
else
return;
}
if (ieee->iw_mode == IW_MODE_INFRA) {
tcb_desc->ampdu_enable = true;
tcb_desc->ampdu_factor = ht_info->current_ampdu_factor;
tcb_desc->ampdu_density = ht_info->current_mpdu_density;
}
}
}
static void rtllib_query_short_preamble_mode(struct rtllib_device *ieee,
struct cb_desc *tcb_desc)
{
tcb_desc->use_short_preamble = false;
if (tcb_desc->data_rate == 2)
return;
else if (ieee->current_network.capability &
WLAN_CAPABILITY_SHORT_PREAMBLE)
tcb_desc->use_short_preamble = true;
}
static void rtllib_query_ht_cap_short_gi(struct rtllib_device *ieee,
struct cb_desc *tcb_desc)
{
struct rt_hi_throughput *ht_info = ieee->ht_info;
tcb_desc->use_short_gi = false;
if (!ht_info->current_ht_support || !ht_info->enable_ht)
return;
if (ht_info->cur_bw_40mhz && ht_info->cur_short_gi_40mhz)
tcb_desc->use_short_gi = true;
else if (!ht_info->cur_bw_40mhz && ht_info->cur_short_gi_20mhz)
tcb_desc->use_short_gi = true;
}
static void rtllib_query_bandwidth_mode(struct rtllib_device *ieee,
struct cb_desc *tcb_desc)
{
struct rt_hi_throughput *ht_info = ieee->ht_info;
tcb_desc->packet_bw = false;
if (!ht_info->current_ht_support || !ht_info->enable_ht)
return;
if (tcb_desc->multicast || tcb_desc->broadcast)
return;
if ((tcb_desc->data_rate & 0x80) == 0)
return;
if (ht_info->cur_bw_40mhz && ht_info->cur_tx_bw40mhz &&
!ieee->bandwidth_auto_switch.forced_tx_20MHz)
tcb_desc->packet_bw = true;
}
static void rtllib_query_protectionmode(struct rtllib_device *ieee,
struct cb_desc *tcb_desc,
struct sk_buff *skb)
{
struct rt_hi_throughput *ht_info;
tcb_desc->rtsstbc = false;
tcb_desc->rts_use_short_gi = false;
tcb_desc->cts_enable = false;
tcb_desc->RTSSC = 0;
tcb_desc->rts_bw = false;
if (tcb_desc->broadcast || tcb_desc->multicast)
return;
if (is_broadcast_ether_addr(skb->data + 16))
return;
if (ieee->mode < WIRELESS_MODE_N_24G) {
if (skb->len > ieee->rts) {
tcb_desc->rts_enable = true;
tcb_desc->rts_rate = MGN_24M;
} else if (ieee->current_network.buseprotection) {
tcb_desc->rts_enable = true;
tcb_desc->cts_enable = true;
tcb_desc->rts_rate = MGN_24M;
}
return;
}
ht_info = ieee->ht_info;
while (true) {
if (ht_info->iot_action & HT_IOT_ACT_FORCED_CTS2SELF) {
tcb_desc->cts_enable = true;
tcb_desc->rts_rate = MGN_24M;
tcb_desc->rts_enable = true;
break;
} else if (ht_info->iot_action & (HT_IOT_ACT_FORCED_RTS |
HT_IOT_ACT_PURE_N_MODE)) {
tcb_desc->rts_enable = true;
tcb_desc->rts_rate = MGN_24M;
break;
}
if (ieee->current_network.buseprotection) {
tcb_desc->rts_enable = true;
tcb_desc->cts_enable = true;
tcb_desc->rts_rate = MGN_24M;
break;
}
if (ht_info->current_ht_support && ht_info->enable_ht) {
u8 ht_op_mode = ht_info->current_op_mode;
if ((ht_info->cur_bw_40mhz && (ht_op_mode == 2 ||
ht_op_mode == 3)) ||
(!ht_info->cur_bw_40mhz && ht_op_mode == 3)) {
tcb_desc->rts_rate = MGN_24M;
tcb_desc->rts_enable = true;
break;
}
}
if (skb->len > ieee->rts) {
tcb_desc->rts_rate = MGN_24M;
tcb_desc->rts_enable = true;
break;
}
if (tcb_desc->ampdu_enable) {
tcb_desc->rts_rate = MGN_24M;
tcb_desc->rts_enable = false;
break;
}
goto NO_PROTECTION;
}
if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
tcb_desc->use_short_preamble = true;
return;
NO_PROTECTION:
tcb_desc->rts_enable = false;
tcb_desc->cts_enable = false;
tcb_desc->rts_rate = 0;
tcb_desc->RTSSC = 0;
tcb_desc->rts_bw = false;
}
static void rtllib_txrate_selectmode(struct rtllib_device *ieee,
struct cb_desc *tcb_desc)
{
if (ieee->tx_dis_rate_fallback)
tcb_desc->tx_dis_rate_fallback = true;
if (ieee->tx_use_drv_assinged_rate)
tcb_desc->tx_use_drv_assinged_rate = true;
if (!tcb_desc->tx_dis_rate_fallback ||
!tcb_desc->tx_use_drv_assinged_rate) {
if (ieee->iw_mode == IW_MODE_INFRA)
tcb_desc->ratr_index = 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 (is_qos_data_frame(skb->data)) {
struct tx_ts_record *ts = NULL;
if (!rtllib_get_ts(ieee, (struct ts_common_info **)(&ts), dst,
skb->priority, TX_DIR, true))
return 0;
seqnum = ts->tx_cur_seq;
ts->tx_cur_seq = (ts->tx_cur_seq + 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->ht_curr_op_rate)
return ieee->ht_curr_op_rate;
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 ieee80211_qos_hdr *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 ieee80211_qos_hdr header = { /* Ensure zero initialized */
.duration_id = 0,
.seq_ctrl = 0,
.qos_ctrl = 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 is_multicast = 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->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 (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->lps_delay_cnt = 200;
}
}
} else if (ether_type == ETH_P_ARP) {
netdev_info(ieee->dev,
"=================>DHCP Protocol start tx ARP pkt!!\n");
bdhcp = true;
ieee->lps_delay_cnt =
ieee->current_network.tim.tim_count;
}
}
skb->priority = rtllib_classify(skb);
crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) && 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 | IEEE80211_FCTL_PROTECTED;
else
fc = RTLLIB_FTYPE_DATA;
if (qos_activated)
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
*/
ether_addr_copy(header.addr1,
ieee->current_network.bssid);
ether_addr_copy(header.addr2, src);
ether_addr_copy(header.addr3, dest);
}
is_multicast = is_multicast_ether_addr(header.addr1);
header.frame_control = cpu_to_le16(fc);
/* Determine fragmentation size based on destination (multicast
* and broadcast are not fragmented)
*/
if (is_multicast) {
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_ctrl = 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->hw_sec = 1;
else
tcb_desc->hw_sec = 0;
skb_reserve(skb_frag,
crypt->ops->extra_mpdu_prefix_len +
crypt->ops->extra_msdu_prefix_len);
} else {
tcb_desc->hw_sec = 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_control = cpu_to_le16(fc |
IEEE80211_FCTL_MOREFRAGS);
bytes = bytes_per_frag;
} else {
/* The last fragment has the remaining length */
bytes = bytes_last_frag;
}
if ((qos_activated) && (!is_multicast)) {
frag_hdr->seq_ctrl =
cpu_to_le16(rtllib_query_seqnum(ieee, skb_frag,
header.addr1));
frag_hdr->seq_ctrl =
cpu_to_le16(le16_to_cpu(frag_hdr->seq_ctrl) << 4 | i);
} else {
frag_hdr->seq_ctrl =
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) && (!is_multicast)) {
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]++;
}
success:
if (txb) {
tcb_desc = (struct cb_desc *)
(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE);
tcb_desc->tx_enable_fw_calc_dur = 1;
tcb_desc->priority = skb->priority;
if (ether_type == ETH_P_PAE) {
if (ieee->ht_info->iot_action &
HT_IOT_ACT_WA_IOT_Broadcom) {
tcb_desc->data_rate =
mgnt_query_tx_rate_exclude_cck_rates(ieee);
tcb_desc->tx_dis_rate_fallback = false;
} else {
tcb_desc->data_rate = ieee->basic_rate;
tcb_desc->tx_dis_rate_fallback = 1;
}
tcb_desc->ratr_index = 7;
tcb_desc->tx_use_drv_assinged_rate = 1;
} else {
if (is_multicast_ether_addr(header.addr1))
tcb_desc->multicast = 1;
if (is_broadcast_ether_addr(header.addr1))
tcb_desc->broadcast = 1;
rtllib_txrate_selectmode(ieee, tcb_desc);
if (tcb_desc->multicast || tcb_desc->broadcast)
tcb_desc->data_rate = ieee->basic_rate;
else
tcb_desc->data_rate = rtllib_current_rate(ieee);
if (bdhcp) {
if (ieee->ht_info->iot_action &
HT_IOT_ACT_WA_IOT_Broadcom) {
tcb_desc->data_rate =
mgnt_query_tx_rate_exclude_cck_rates(ieee);
tcb_desc->tx_dis_rate_fallback = false;
} else {
tcb_desc->data_rate = MGN_1M;
tcb_desc->tx_dis_rate_fallback = 1;
}
tcb_desc->ratr_index = 7;
tcb_desc->tx_use_drv_assinged_rate = 1;
tcb_desc->bdhcp = 1;
}
rtllib_query_short_preamble_mode(ieee, tcb_desc);
rtllib_tx_query_agg_cap(ieee, txb->fragments[0],
tcb_desc);
rtllib_query_ht_cap_short_gi(ieee, tcb_desc);
rtllib_query_bandwidth_mode(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 {
rtllib_txb_free(txb);
}
}
return 0;
failed:
spin_unlock_irqrestore(&ieee->lock, flags);
netif_stop_queue(dev);
stats->tx_errors++;
return 1;
}
netdev_tx_t rtllib_xmit(struct sk_buff *skb, struct net_device *dev)
{
memset(skb->cb, 0, sizeof(skb->cb));
return rtllib_xmit_inter(skb, dev) ? NETDEV_TX_BUSY : NETDEV_TX_OK;
}
EXPORT_SYMBOL(rtllib_xmit);
Codebase Browser
linux