diff options
Diffstat (limited to 'drivers/staging/rtl8187se/ieee80211/ieee80211_tx.c')
| -rw-r--r-- | drivers/staging/rtl8187se/ieee80211/ieee80211_tx.c | 828 |
1 files changed, 828 insertions, 0 deletions
diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_tx.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_tx.c new file mode 100644 index 00000000000..33a0687252a --- /dev/null +++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_tx.c @@ -0,0 +1,828 @@ +/****************************************************************************** + + 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 <andreamrl@tiscali.it> + + A special thanks goes to Realtek for their support ! + +******************************************************************************/ + +#include <linux/compiler.h> +//#include <linux/config.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/version.h> +#include <linux/wireless.h> +#include <linux/etherdevice.h> +#include <asm/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]; + + *(u16 *)(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; + + /*added to care about null crypt condition, to solve that system hangs when shared keys error*/ + if (!crypt || !crypt->ops) + return -1; + +#ifdef CONFIG_IEEE80211_CRYPT_TKIP + struct ieee80211_hdr *header; + + if (ieee->tkip_countermeasures && + crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) { + header = (struct ieee80211_hdr *) frag->data; + if (net_ratelimit()) { + printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " + "TX packet to " MAC_FMT "\n", + ieee->dev->name, MAC_ARG(header->addr1)); + } + return -1; + } +#endif + /* 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) { + printk(KERN_INFO "%s: Encryption failed: len=%d.\n", + ieee->dev->name, 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; + for (i = 0; i < txb->nr_frags; i++) + if (txb->fragments[i]) + dev_kfree_skb_any(txb->fragments[i]); + kfree(txb); +} + +struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size, + int 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 = txb_size; + + for (i = 0; i < nr_frags; i++) { + txb->fragments[i] = dev_alloc_skb(txb_size); + if (unlikely(!txb->fragments[i])) { + i--; + break; + } + } + 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 ether_header *eh = (struct ether_header*)skb->data; + unsigned int wme_UP = 0; + + if(!network->QoS_Enable) { + skb->priority = 0; + return(wme_UP); + } + + if(eh->ether_type == __constant_htons(ETHERTYPE_IP)) { + const struct iphdr *ih = (struct iphdr*)(skb->data + \ + sizeof(struct ether_header)); + wme_UP = (ih->tos >> 5)&0x07; + } else if (vlan_tx_tag_present(skb)) {//vtag packet +#ifndef VLAN_PRI_SHIFT +#define VLAN_PRI_SHIFT 13 /* Shift to find VLAN user priority */ +#define VLAN_PRI_MASK 7 /* Mask for user priority bits in VLAN */ +#endif + u32 tag = vlan_tx_tag_get(skb); + wme_UP = (tag >> VLAN_PRI_SHIFT) & VLAN_PRI_MASK; + } else if(ETH_P_PAE == ntohs(((struct ethhdr *)skb->data)->h_proto)) { + //printk(KERN_WARNING "type = normal packet\n"); + wme_UP = 7; + } + + skb->priority = wme_UP; + return(wme_UP); +} + +#ifdef _RTL8187_EXT_PATCH_ +// based on part of ieee80211_xmit. Mainly allocate txb. ieee->lock is held +struct ieee80211_txb *ieee80211_ext_alloc_txb(struct sk_buff *skb, struct net_device *dev, struct ieee80211_hdr_3addr *header, int hdr_len, u8 isQoS, u16 *pQOS_ctl, int isEncrypt, struct ieee80211_crypt_data* crypt) +{ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) + struct ieee80211_device *ieee = netdev_priv(dev); +#else + struct ieee80211_device *ieee = (struct ieee80211_device *)dev->priv; +#endif + struct ieee80211_txb *txb = NULL; + struct ieee80211_hdr_3addr *frag_hdr; + int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size; + int ether_type; + int bytes, QOS_ctl; + struct sk_buff *skb_frag; + + ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); + + /* 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); + + /* Determine fragmentation size based on destination (multicast + * and broadcast are not fragmented) */ + // if (is_multicast_ether_addr(dest) || + // is_broadcast_ether_addr(dest)) { + if (is_multicast_ether_addr(header->addr1) || + is_broadcast_ether_addr(header->addr1)) { + frag_size = MAX_FRAG_THRESHOLD; + QOS_ctl = QOS_CTL_NOTCONTAIN_ACK; + } + else { + //printk(KERN_WARNING "&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&frag_size = %d\n", frag_size); + frag_size = ieee->fts;//default:392 + QOS_ctl = 0; + } + + if(isQoS) { + QOS_ctl |= skb->priority; //set in the ieee80211_classify + *pQOS_ctl = cpu_to_le16(QOS_ctl); + } + //printk(KERN_WARNING "header size = %d, QOS_ctl = %x\n", hdr_len,QOS_ctl); + /* 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 - (IEEE80211_3ADDR_LEN + (ieee->current_network->QoS_Enable ? 2:0)); + 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 encryptiong pre/postfix */ + if (isEncrypt) + 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, GFP_ATOMIC); + if (unlikely(!txb)) { + printk(KERN_WARNING "%s: Could not allocate TXB\n", + ieee->dev->name); + return NULL; + } + txb->encrypted = isEncrypt; + txb->payload_size = bytes; + + for (i = 0; i < nr_frags; i++) { + skb_frag = txb->fragments[i]; + skb_frag->priority = UP2AC(skb->priority); + if (isEncrypt) + skb_reserve(skb_frag, crypt->ops->extra_prefix_len); + + frag_hdr = (struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len); + memcpy(frag_hdr, (void *)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( + header->frame_ctl | IEEE80211_FCTL_MOREFRAGS); + bytes = bytes_per_frag; + + } else { + /* The last fragment takes the remaining length */ + bytes = bytes_last_frag; + } + + frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i); + //frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl<<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); + } + + 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 (isEncrypt) + ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); + if (ieee->config & + (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) + skb_put(skb_frag, 4); + } + // Advance sequence number in data frame. + //printk(KERN_WARNING "QoS Enalbed? %s\n", ieee->current_network.QoS_Enable?"Y":"N"); + if (ieee->seq_ctrl[0] == 0xFFF) + ieee->seq_ctrl[0] = 0; + else + ieee->seq_ctrl[0]++; + // stanley, just for debug +/* +{ + int j=0; + for(j=0;j<nr_frags;j++) + { + int i; + struct sk_buff *skb = txb->fragments[j]; + printk("send(%d): ", j); + for (i=0;i<skb->len;i++) + printk("%02X ", skb->data[i]&0xff); + printk("\n"); + } +} +*/ + + return txb; +} + + +// based on part of ieee80211_xmit. Mainly allocate txb. ieee->lock is held +// Assume no encryption, no FCS computing +struct ieee80211_txb *ieee80211_ext_reuse_txb(struct sk_buff *skb, struct net_device *dev, struct ieee80211_hdr_3addr *header, int hdr_len, u8 isQoS, u16 *pQOS_ctl, int isEncrypt, struct ieee80211_crypt_data* crypt) +{ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) + struct ieee80211_device *ieee = netdev_priv(dev); +#else + struct ieee80211_device *ieee = (struct ieee80211_device *)dev->priv; +#endif + struct ieee80211_txb *txb = NULL; + struct ieee80211_hdr_3addr *frag_hdr; + int ether_type; + int bytes, QOS_ctl; + + ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); + + /* 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 (is_multicast_ether_addr(header->addr1) || + is_broadcast_ether_addr(header->addr1)) { + QOS_ctl = QOS_CTL_NOTCONTAIN_ACK; + } + else { + QOS_ctl = 0; + } + + if(isQoS) { + QOS_ctl |= skb->priority; //set in the ieee80211_classify + *pQOS_ctl = cpu_to_le16(QOS_ctl); + } + + txb = kmalloc( sizeof(struct ieee80211_txb) + sizeof(u8*), GFP_ATOMIC ); + if (unlikely(!txb)) { + printk(KERN_WARNING "%s: Could not allocate TXB\n", + ieee->dev->name); + return NULL; + } + + txb->nr_frags = 1; + txb->frag_size = bytes; + txb->encrypted = isEncrypt; + txb->payload_size = bytes; + + txb->fragments[0] = skb; + ieee80211_put_snap( + skb_push(skb, SNAP_SIZE + sizeof(u16)), ether_type); + frag_hdr = (struct ieee80211_hdr_3addr *)skb_push(skb, hdr_len); + memcpy(frag_hdr, (void *)header, hdr_len); + frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | 0); + skb->priority = UP2AC(skb->priority); + + // Advance sequence number in data frame. + //printk(KERN_WARNING "QoS Enalbed? %s\n", ieee->current_network.QoS_Enable?"Y":"N"); + if (ieee->seq_ctrl[0] == 0xFFF) + ieee->seq_ctrl[0] = 0; + else + ieee->seq_ctrl[0]++; + + return txb; +} + +#endif // _RTL8187_EXT_PATCH_ + +/* SKBs are added to the ieee->tx_queue. */ +int ieee80211_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct ieee80211_device *ieee = netdev_priv(dev); + struct ieee80211_txb *txb = NULL; + struct ieee80211_hdr_3addr_QOS *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, encrypt; + int bytes, fc, QOS_ctl, hdr_len; + struct sk_buff *skb_frag; + //struct ieee80211_hdr header = { /* Ensure zero initialized */ + // .duration_id = 0, + // .seq_ctl = 0 + //}; + struct ieee80211_hdr_3addr_QOS header = { /* Ensure zero initialized */ + .duration_id = 0, + .seq_ctl = 0, + .QOS_ctl = 0 + }; + u8 dest[ETH_ALEN], src[ETH_ALEN]; + + struct ieee80211_crypt_data* crypt; + + //printk(KERN_WARNING "upper layer packet!\n"); + 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)))) { + printk(KERN_WARNING "%s: No xmit handler.\n", + ieee->dev->name); + goto success; + } + + ieee80211_classify(skb,&ieee->current_network); + if(likely(ieee->raw_tx == 0)){ + + if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) { + printk(KERN_WARNING "%s: skb too small (%d).\n", + ieee->dev->name, skb->len); + goto success; + } + + +#ifdef _RTL8187_EXT_PATCH_ + // note, skb->priority which was set by ieee80211_classify, and used by physical tx + if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_xmit)) + { + txb = ieee->ext_patch_ieee80211_xmit(skb, dev); + goto success; + } +#endif + + 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(ieee->current_network.QoS_Enable) { + if (encrypt) + fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA | + IEEE80211_FCTL_WEP; + else + fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA; + + } else { + if (encrypt) + fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA | + IEEE80211_FCTL_WEP; + else + fc = IEEE80211_FTYPE_DATA | 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); + } + // printk(KERN_WARNING "essid MAC address is "MAC_FMT, MAC_ARG(&header.addr1)); + header.frame_ctl = cpu_to_le16(fc); + //hdr_len = IEEE80211_3ADDR_LEN; + + /* Determine fragmentation size based on destination (multicast + * and broadcast are not fragmented) */ +// if (is_multicast_ether_addr(dest) || +// is_broadcast_ether_addr(dest)) { + if (is_multicast_ether_addr(header.addr1) || + is_broadcast_ether_addr(header.addr1)) { + frag_size = MAX_FRAG_THRESHOLD; + QOS_ctl = QOS_CTL_NOTCONTAIN_ACK; + } + else { + //printk(KERN_WARNING "&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&frag_size = %d\n", frag_size); + frag_size = ieee->fts;//default:392 + QOS_ctl = 0; + } + + if (ieee->current_network.QoS_Enable) { + hdr_len = IEEE80211_3ADDR_LEN + 2; + QOS_ctl |= skb->priority; //set in the ieee80211_classify + header.QOS_ctl = cpu_to_le16(QOS_ctl); + } else { + hdr_len = IEEE80211_3ADDR_LEN; + } + //printk(KERN_WARNING "header size = %d, QOS_ctl = %x\n", hdr_len,QOS_ctl); + /* 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 - (IEEE80211_3ADDR_LEN + (ieee->current_network->QoS_Enable ? 2:0)); + 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 encryptiong 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, GFP_ATOMIC); + if (unlikely(!txb)) { + printk(KERN_WARNING "%s: Could not allocate TXB\n", + ieee->dev->name); + goto failed; + } + txb->encrypted = encrypt; + txb->payload_size = bytes; + + for (i = 0; i < nr_frags; i++) { + skb_frag = txb->fragments[i]; + skb_frag->priority = UP2AC(skb->priority); + if (encrypt) + skb_reserve(skb_frag, crypt->ops->extra_prefix_len); + + frag_hdr = (struct ieee80211_hdr_3addr_QOS *)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 | 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) { + // 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); + //printk(KERN_WARNING "skb->priority = %d,", skb->priority); + //printk(KERN_WARNING "type:%d: seq = %d\n",UP2AC(skb->priority),ieee->seq_ctrl[UP2AC(skb->priority)+1]); + } else { + frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i); + } + //frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl<<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); + } + + 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) + ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); + if (ieee->config & + (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) + skb_put(skb_frag, 4); + } + // Advance sequence number in data frame. + //printk(KERN_WARNING "QoS Enalbed? %s\n", ieee->current_network.QoS_Enable?"Y":"N"); + if (ieee->current_network.QoS_Enable) { + 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 ieee80211_hdr_3addr))) { + printk(KERN_WARNING "%s: skb too small (%d).\n", + ieee->dev->name, skb->len); + goto success; + } + + txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC); + if(!txb){ + printk(KERN_WARNING "%s: Could not allocate TXB\n", + ieee->dev->name); + goto failed; + } + + txb->encrypted = 0; + txb->payload_size = skb->len; + memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len); + } + + success: + spin_unlock_irqrestore(&ieee->lock, flags); +#ifdef _RTL8187_EXT_PATCH_ + // Sometimes, extension mode can reuse skb (by txb->fragments[0]) + if( ! ((ieee->iw_mode == ieee->iw_ext_mode) && txb && (txb->fragments[0] == skb)) ) +#endif + 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 += txb->payload_size; + return 0; + } + ieee80211_txb_free(txb); + } + } + + return 0; + + failed: + spin_unlock_irqrestore(&ieee->lock, flags); + netif_stop_queue(dev); + stats->tx_errors++; + return 1; + +} + +#if 0 +EXPORT_SYMBOL(ieee80211_txb_free); +#ifdef _RTL8187_EXT_PATCH_ +EXPORT_SYMBOL(ieee80211_alloc_txb); +EXPORT_SYMBOL(ieee80211_ext_alloc_txb); +EXPORT_SYMBOL(ieee80211_ext_reuse_txb); +#endif // _RTL8187_EXT_PATCH_ +#endif |