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c8d86be3 GKH |
1 | /****************************************************************************** |
2 | ||
3 | Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify it | |
6 | under the terms of version 2 of the GNU General Public License as | |
7 | published by the Free Software Foundation. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License along with | |
15 | this program; if not, write to the Free Software Foundation, Inc., 59 | |
16 | Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | ||
18 | The full GNU General Public License is included in this distribution in the | |
19 | file called LICENSE. | |
20 | ||
21 | Contact Information: | |
22 | James P. Ketrenos <ipw2100-admin@linux.intel.com> | |
23 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | ||
25 | ****************************************************************************** | |
26 | ||
27 | Few modifications for Realtek's Wi-Fi drivers by | |
28 | Andrea Merello <andreamrl@tiscali.it> | |
29 | ||
30 | A special thanks goes to Realtek for their support ! | |
31 | ||
32 | ******************************************************************************/ | |
33 | ||
34 | #include <linux/compiler.h> | |
35 | //#include <linux/config.h> | |
36 | #include <linux/errno.h> | |
37 | #include <linux/if_arp.h> | |
38 | #include <linux/in6.h> | |
39 | #include <linux/in.h> | |
40 | #include <linux/ip.h> | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/netdevice.h> | |
44 | #include <linux/pci.h> | |
45 | #include <linux/proc_fs.h> | |
46 | #include <linux/skbuff.h> | |
47 | #include <linux/slab.h> | |
48 | #include <linux/tcp.h> | |
49 | #include <linux/types.h> | |
c8d86be3 GKH |
50 | #include <linux/wireless.h> |
51 | #include <linux/etherdevice.h> | |
52 | #include <asm/uaccess.h> | |
53 | #include <linux/if_vlan.h> | |
54 | ||
55 | #include "ieee80211.h" | |
56 | ||
57 | ||
58 | /* | |
59 | ||
60 | ||
61 | 802.11 Data Frame | |
62 | ||
63 | ||
64 | 802.11 frame_contorl for data frames - 2 bytes | |
65 | ,-----------------------------------------------------------------------------------------. | |
66 | bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e | | |
67 | |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------| | |
68 | val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x | | |
69 | |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------| | |
70 | desc | ^-ver-^ | ^type-^ | ^-----subtype-----^ | to |from |more |retry| pwr |more |wep | | |
71 | | | | x=0 data,x=1 data+ack | DS | DS |frag | | mgm |data | | | |
72 | '-----------------------------------------------------------------------------------------' | |
73 | /\ | |
74 | | | |
75 | 802.11 Data Frame | | |
76 | ,--------- 'ctrl' expands to >-----------' | |
77 | | | |
78 | ,--'---,-------------------------------------------------------------. | |
79 | Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 | | |
80 | |------|------|---------|---------|---------|------|---------|------| | |
81 | Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs | | |
82 | | | tion | (BSSID) | | | ence | data | | | |
83 | `--------------------------------------------------| |------' | |
84 | Total: 28 non-data bytes `----.----' | |
85 | | | |
86 | .- 'Frame data' expands to <---------------------------' | |
87 | | | |
88 | V | |
89 | ,---------------------------------------------------. | |
90 | Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 | | |
91 | |------|------|---------|----------|------|---------| | |
92 | Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP | | |
93 | | DSAP | SSAP | | | | Packet | | |
94 | | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | | | |
95 | `-----------------------------------------| | | |
96 | Total: 8 non-data bytes `----.----' | |
97 | | | |
98 | .- 'IP Packet' expands, if WEP enabled, to <--' | |
99 | | | |
100 | V | |
101 | ,-----------------------. | |
102 | Bytes | 4 | 0-2296 | 4 | | |
103 | |-----|-----------|-----| | |
104 | Desc. | IV | Encrypted | ICV | | |
105 | | | IP Packet | | | |
106 | `-----------------------' | |
107 | Total: 8 non-data bytes | |
108 | ||
109 | ||
110 | 802.3 Ethernet Data Frame | |
111 | ||
112 | ,-----------------------------------------. | |
113 | Bytes | 6 | 6 | 2 | Variable | 4 | | |
114 | |-------|-------|------|-----------|------| | |
115 | Desc. | Dest. | Source| Type | IP Packet | fcs | | |
116 | | MAC | MAC | | | | | |
117 | `-----------------------------------------' | |
118 | Total: 18 non-data bytes | |
119 | ||
120 | In the event that fragmentation is required, the incoming payload is split into | |
121 | N parts of size ieee->fts. The first fragment contains the SNAP header and the | |
122 | remaining packets are just data. | |
123 | ||
124 | If encryption is enabled, each fragment payload size is reduced by enough space | |
125 | to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP) | |
126 | So if you have 1500 bytes of payload with ieee->fts set to 500 without | |
127 | encryption it will take 3 frames. With WEP it will take 4 frames as the | |
128 | payload of each frame is reduced to 492 bytes. | |
129 | ||
130 | * SKB visualization | |
131 | * | |
132 | * ,- skb->data | |
133 | * | | |
134 | * | ETHERNET HEADER ,-<-- PAYLOAD | |
135 | * | | 14 bytes from skb->data | |
136 | * | 2 bytes for Type --> ,T. | (sizeof ethhdr) | |
137 | * | | | | | |
138 | * |,-Dest.--. ,--Src.---. | | | | |
139 | * | 6 bytes| | 6 bytes | | | | | |
140 | * v | | | | | | | |
141 | * 0 | v 1 | v | v 2 | |
142 | * 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 | |
143 | * ^ | ^ | ^ | | |
144 | * | | | | | | | |
145 | * | | | | `T' <---- 2 bytes for Type | |
146 | * | | | | | |
147 | * | | '---SNAP--' <-------- 6 bytes for SNAP | |
148 | * | | | |
149 | * `-IV--' <-------------------- 4 bytes for IV (WEP) | |
150 | * | |
151 | * SNAP HEADER | |
152 | * | |
153 | */ | |
154 | ||
155 | static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 }; | |
156 | static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 }; | |
157 | ||
158 | static inline int ieee80211_put_snap(u8 *data, u16 h_proto) | |
159 | { | |
160 | struct ieee80211_snap_hdr *snap; | |
161 | u8 *oui; | |
162 | ||
163 | snap = (struct ieee80211_snap_hdr *)data; | |
164 | snap->dsap = 0xaa; | |
165 | snap->ssap = 0xaa; | |
166 | snap->ctrl = 0x03; | |
167 | ||
168 | if (h_proto == 0x8137 || h_proto == 0x80f3) | |
169 | oui = P802_1H_OUI; | |
170 | else | |
171 | oui = RFC1042_OUI; | |
172 | snap->oui[0] = oui[0]; | |
173 | snap->oui[1] = oui[1]; | |
174 | snap->oui[2] = oui[2]; | |
175 | ||
176 | *(u16 *)(data + SNAP_SIZE) = htons(h_proto); | |
177 | ||
178 | return SNAP_SIZE + sizeof(u16); | |
179 | } | |
180 | ||
181 | int ieee80211_encrypt_fragment( | |
182 | struct ieee80211_device *ieee, | |
183 | struct sk_buff *frag, | |
184 | int hdr_len) | |
185 | { | |
186 | struct ieee80211_crypt_data* crypt = ieee->crypt[ieee->tx_keyidx]; | |
187 | int res; | |
188 | ||
189 | /*added to care about null crypt condition, to solve that system hangs when shared keys error*/ | |
190 | if (!crypt || !crypt->ops) | |
191 | return -1; | |
192 | ||
193 | #ifdef CONFIG_IEEE80211_CRYPT_TKIP | |
0604384d | 194 | struct ieee80211_hdr_4addr *header; |
c8d86be3 GKH |
195 | |
196 | if (ieee->tkip_countermeasures && | |
197 | crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) { | |
0604384d | 198 | header = (struct ieee80211_hdr_4addr *)frag->data; |
c8d86be3 GKH |
199 | if (net_ratelimit()) { |
200 | printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " | |
201 | "TX packet to " MAC_FMT "\n", | |
202 | ieee->dev->name, MAC_ARG(header->addr1)); | |
203 | } | |
204 | return -1; | |
205 | } | |
206 | #endif | |
207 | /* To encrypt, frame format is: | |
208 | * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) */ | |
209 | ||
210 | // PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption. | |
211 | /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so | |
212 | * call both MSDU and MPDU encryption functions from here. */ | |
213 | atomic_inc(&crypt->refcnt); | |
214 | res = 0; | |
215 | if (crypt->ops->encrypt_msdu) | |
216 | res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv); | |
217 | if (res == 0 && crypt->ops->encrypt_mpdu) | |
218 | res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv); | |
219 | ||
220 | atomic_dec(&crypt->refcnt); | |
221 | if (res < 0) { | |
222 | printk(KERN_INFO "%s: Encryption failed: len=%d.\n", | |
223 | ieee->dev->name, frag->len); | |
224 | ieee->ieee_stats.tx_discards++; | |
225 | return -1; | |
226 | } | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | ||
232 | void ieee80211_txb_free(struct ieee80211_txb *txb) { | |
233 | int i; | |
234 | if (unlikely(!txb)) | |
235 | return; | |
236 | for (i = 0; i < txb->nr_frags; i++) | |
237 | if (txb->fragments[i]) | |
238 | dev_kfree_skb_any(txb->fragments[i]); | |
239 | kfree(txb); | |
240 | } | |
241 | ||
242 | struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size, | |
243 | int gfp_mask) | |
244 | { | |
245 | struct ieee80211_txb *txb; | |
246 | int i; | |
247 | txb = kmalloc( | |
248 | sizeof(struct ieee80211_txb) + (sizeof(u8*) * nr_frags), | |
249 | gfp_mask); | |
250 | if (!txb) | |
251 | return NULL; | |
252 | ||
253 | memset(txb, 0, sizeof(struct ieee80211_txb)); | |
254 | txb->nr_frags = nr_frags; | |
255 | txb->frag_size = txb_size; | |
256 | ||
257 | for (i = 0; i < nr_frags; i++) { | |
258 | txb->fragments[i] = dev_alloc_skb(txb_size); | |
259 | if (unlikely(!txb->fragments[i])) { | |
260 | i--; | |
261 | break; | |
262 | } | |
263 | } | |
264 | if (unlikely(i != nr_frags)) { | |
265 | while (i >= 0) | |
266 | dev_kfree_skb_any(txb->fragments[i--]); | |
267 | kfree(txb); | |
268 | return NULL; | |
269 | } | |
270 | return txb; | |
271 | } | |
272 | ||
273 | // Classify the to-be send data packet | |
274 | // Need to acquire the sent queue index. | |
275 | static int | |
276 | ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network) | |
277 | { | |
278 | struct ether_header *eh = (struct ether_header*)skb->data; | |
279 | unsigned int wme_UP = 0; | |
280 | ||
281 | if(!network->QoS_Enable) { | |
282 | skb->priority = 0; | |
283 | return(wme_UP); | |
284 | } | |
285 | ||
286 | if(eh->ether_type == __constant_htons(ETHERTYPE_IP)) { | |
287 | const struct iphdr *ih = (struct iphdr*)(skb->data + \ | |
288 | sizeof(struct ether_header)); | |
289 | wme_UP = (ih->tos >> 5)&0x07; | |
290 | } else if (vlan_tx_tag_present(skb)) {//vtag packet | |
291 | #ifndef VLAN_PRI_SHIFT | |
292 | #define VLAN_PRI_SHIFT 13 /* Shift to find VLAN user priority */ | |
293 | #define VLAN_PRI_MASK 7 /* Mask for user priority bits in VLAN */ | |
294 | #endif | |
295 | u32 tag = vlan_tx_tag_get(skb); | |
296 | wme_UP = (tag >> VLAN_PRI_SHIFT) & VLAN_PRI_MASK; | |
297 | } else if(ETH_P_PAE == ntohs(((struct ethhdr *)skb->data)->h_proto)) { | |
298 | //printk(KERN_WARNING "type = normal packet\n"); | |
299 | wme_UP = 7; | |
300 | } | |
301 | ||
302 | skb->priority = wme_UP; | |
303 | return(wme_UP); | |
304 | } | |
305 | ||
c8d86be3 GKH |
306 | /* SKBs are added to the ieee->tx_queue. */ |
307 | int ieee80211_xmit(struct sk_buff *skb, | |
308 | struct net_device *dev) | |
309 | { | |
310 | struct ieee80211_device *ieee = netdev_priv(dev); | |
311 | struct ieee80211_txb *txb = NULL; | |
726f11e8 | 312 | struct ieee80211_hdr_3addrqos *frag_hdr; |
c8d86be3 GKH |
313 | int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size; |
314 | unsigned long flags; | |
315 | struct net_device_stats *stats = &ieee->stats; | |
316 | int ether_type, encrypt; | |
726f11e8 | 317 | int bytes, fc, qos_ctl, hdr_len; |
c8d86be3 | 318 | struct sk_buff *skb_frag; |
726f11e8 | 319 | struct ieee80211_hdr_3addrqos header = { /* Ensure zero initialized */ |
c8d86be3 GKH |
320 | .duration_id = 0, |
321 | .seq_ctl = 0, | |
726f11e8 | 322 | .qos_ctl = 0 |
c8d86be3 GKH |
323 | }; |
324 | u8 dest[ETH_ALEN], src[ETH_ALEN]; | |
325 | ||
326 | struct ieee80211_crypt_data* crypt; | |
327 | ||
328 | //printk(KERN_WARNING "upper layer packet!\n"); | |
329 | spin_lock_irqsave(&ieee->lock, flags); | |
330 | ||
331 | /* If there is no driver handler to take the TXB, dont' bother | |
332 | * creating it... */ | |
333 | if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))|| | |
334 | ((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) { | |
335 | printk(KERN_WARNING "%s: No xmit handler.\n", | |
336 | ieee->dev->name); | |
337 | goto success; | |
338 | } | |
339 | ||
340 | ieee80211_classify(skb,&ieee->current_network); | |
341 | if(likely(ieee->raw_tx == 0)){ | |
342 | ||
343 | if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) { | |
344 | printk(KERN_WARNING "%s: skb too small (%d).\n", | |
345 | ieee->dev->name, skb->len); | |
346 | goto success; | |
347 | } | |
348 | ||
c8d86be3 GKH |
349 | ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); |
350 | ||
351 | crypt = ieee->crypt[ieee->tx_keyidx]; | |
352 | ||
353 | encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) && | |
354 | ieee->host_encrypt && crypt && crypt->ops; | |
355 | ||
356 | if (!encrypt && ieee->ieee802_1x && | |
357 | ieee->drop_unencrypted && ether_type != ETH_P_PAE) { | |
358 | stats->tx_dropped++; | |
359 | goto success; | |
360 | } | |
361 | ||
362 | #ifdef CONFIG_IEEE80211_DEBUG | |
363 | if (crypt && !encrypt && ether_type == ETH_P_PAE) { | |
364 | struct eapol *eap = (struct eapol *)(skb->data + | |
365 | sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16)); | |
366 | IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n", | |
367 | eap_get_type(eap->type)); | |
368 | } | |
369 | #endif | |
370 | ||
371 | /* Save source and destination addresses */ | |
372 | memcpy(&dest, skb->data, ETH_ALEN); | |
373 | memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN); | |
374 | ||
375 | /* Advance the SKB to the start of the payload */ | |
376 | skb_pull(skb, sizeof(struct ethhdr)); | |
377 | ||
378 | /* Determine total amount of storage required for TXB packets */ | |
379 | bytes = skb->len + SNAP_SIZE + sizeof(u16); | |
380 | ||
381 | if(ieee->current_network.QoS_Enable) { | |
382 | if (encrypt) | |
383 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA | | |
384 | IEEE80211_FCTL_WEP; | |
385 | else | |
386 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA; | |
387 | ||
388 | } else { | |
389 | if (encrypt) | |
390 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA | | |
391 | IEEE80211_FCTL_WEP; | |
392 | else | |
393 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; | |
394 | } | |
395 | ||
396 | if (ieee->iw_mode == IW_MODE_INFRA) { | |
397 | fc |= IEEE80211_FCTL_TODS; | |
398 | /* To DS: Addr1 = BSSID, Addr2 = SA, | |
399 | Addr3 = DA */ | |
400 | memcpy(&header.addr1, ieee->current_network.bssid, ETH_ALEN); | |
401 | memcpy(&header.addr2, &src, ETH_ALEN); | |
402 | memcpy(&header.addr3, &dest, ETH_ALEN); | |
403 | } else if (ieee->iw_mode == IW_MODE_ADHOC) { | |
404 | /* not From/To DS: Addr1 = DA, Addr2 = SA, | |
405 | Addr3 = BSSID */ | |
406 | memcpy(&header.addr1, dest, ETH_ALEN); | |
407 | memcpy(&header.addr2, src, ETH_ALEN); | |
408 | memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN); | |
409 | } | |
410 | // printk(KERN_WARNING "essid MAC address is "MAC_FMT, MAC_ARG(&header.addr1)); | |
411 | header.frame_ctl = cpu_to_le16(fc); | |
412 | //hdr_len = IEEE80211_3ADDR_LEN; | |
413 | ||
414 | /* Determine fragmentation size based on destination (multicast | |
415 | * and broadcast are not fragmented) */ | |
416 | // if (is_multicast_ether_addr(dest) || | |
417 | // is_broadcast_ether_addr(dest)) { | |
418 | if (is_multicast_ether_addr(header.addr1) || | |
419 | is_broadcast_ether_addr(header.addr1)) { | |
420 | frag_size = MAX_FRAG_THRESHOLD; | |
726f11e8 | 421 | qos_ctl = QOS_CTL_NOTCONTAIN_ACK; |
c8d86be3 GKH |
422 | } |
423 | else { | |
424 | //printk(KERN_WARNING "&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&frag_size = %d\n", frag_size); | |
425 | frag_size = ieee->fts;//default:392 | |
726f11e8 | 426 | qos_ctl = 0; |
c8d86be3 GKH |
427 | } |
428 | ||
429 | if (ieee->current_network.QoS_Enable) { | |
430 | hdr_len = IEEE80211_3ADDR_LEN + 2; | |
726f11e8 BZ |
431 | /* skb->priority is set in the ieee80211_classify() */ |
432 | qos_ctl |= skb->priority; | |
433 | header.qos_ctl = cpu_to_le16(qos_ctl); | |
c8d86be3 GKH |
434 | } else { |
435 | hdr_len = IEEE80211_3ADDR_LEN; | |
436 | } | |
726f11e8 | 437 | |
c8d86be3 GKH |
438 | /* Determine amount of payload per fragment. Regardless of if |
439 | * this stack is providing the full 802.11 header, one will | |
440 | * eventually be affixed to this fragment -- so we must account for | |
441 | * it when determining the amount of payload space. */ | |
442 | //bytes_per_frag = frag_size - (IEEE80211_3ADDR_LEN + (ieee->current_network->QoS_Enable ? 2:0)); | |
443 | bytes_per_frag = frag_size - hdr_len; | |
444 | if (ieee->config & | |
445 | (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) | |
446 | bytes_per_frag -= IEEE80211_FCS_LEN; | |
447 | ||
448 | /* Each fragment may need to have room for encryptiong pre/postfix */ | |
449 | if (encrypt) | |
450 | bytes_per_frag -= crypt->ops->extra_prefix_len + | |
451 | crypt->ops->extra_postfix_len; | |
452 | ||
453 | /* Number of fragments is the total bytes_per_frag / | |
454 | * payload_per_fragment */ | |
455 | nr_frags = bytes / bytes_per_frag; | |
456 | bytes_last_frag = bytes % bytes_per_frag; | |
457 | if (bytes_last_frag) | |
458 | nr_frags++; | |
459 | else | |
460 | bytes_last_frag = bytes_per_frag; | |
461 | ||
462 | /* When we allocate the TXB we allocate enough space for the reserve | |
463 | * and full fragment bytes (bytes_per_frag doesn't include prefix, | |
464 | * postfix, header, FCS, etc.) */ | |
465 | txb = ieee80211_alloc_txb(nr_frags, frag_size, GFP_ATOMIC); | |
466 | if (unlikely(!txb)) { | |
467 | printk(KERN_WARNING "%s: Could not allocate TXB\n", | |
468 | ieee->dev->name); | |
469 | goto failed; | |
470 | } | |
471 | txb->encrypted = encrypt; | |
472 | txb->payload_size = bytes; | |
473 | ||
474 | for (i = 0; i < nr_frags; i++) { | |
475 | skb_frag = txb->fragments[i]; | |
476 | skb_frag->priority = UP2AC(skb->priority); | |
477 | if (encrypt) | |
478 | skb_reserve(skb_frag, crypt->ops->extra_prefix_len); | |
479 | ||
726f11e8 | 480 | frag_hdr = (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len); |
c8d86be3 GKH |
481 | memcpy(frag_hdr, &header, hdr_len); |
482 | ||
483 | /* If this is not the last fragment, then add the MOREFRAGS | |
484 | * bit to the frame control */ | |
485 | if (i != nr_frags - 1) { | |
486 | frag_hdr->frame_ctl = cpu_to_le16( | |
487 | fc | IEEE80211_FCTL_MOREFRAGS); | |
488 | bytes = bytes_per_frag; | |
489 | ||
490 | } else { | |
491 | /* The last fragment takes the remaining length */ | |
492 | bytes = bytes_last_frag; | |
493 | } | |
494 | if(ieee->current_network.QoS_Enable) { | |
495 | // add 1 only indicate to corresponding seq number control 2006/7/12 | |
496 | frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i); | |
497 | //printk(KERN_WARNING "skb->priority = %d,", skb->priority); | |
498 | //printk(KERN_WARNING "type:%d: seq = %d\n",UP2AC(skb->priority),ieee->seq_ctrl[UP2AC(skb->priority)+1]); | |
499 | } else { | |
500 | frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i); | |
501 | } | |
502 | //frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl<<4 | i); | |
503 | // | |
504 | ||
505 | /* Put a SNAP header on the first fragment */ | |
506 | if (i == 0) { | |
507 | ieee80211_put_snap( | |
508 | skb_put(skb_frag, SNAP_SIZE + sizeof(u16)), | |
509 | ether_type); | |
510 | bytes -= SNAP_SIZE + sizeof(u16); | |
511 | } | |
512 | ||
513 | memcpy(skb_put(skb_frag, bytes), skb->data, bytes); | |
514 | ||
515 | /* Advance the SKB... */ | |
516 | skb_pull(skb, bytes); | |
517 | ||
518 | /* Encryption routine will move the header forward in order | |
519 | * to insert the IV between the header and the payload */ | |
520 | if (encrypt) | |
521 | ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); | |
522 | if (ieee->config & | |
523 | (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) | |
524 | skb_put(skb_frag, 4); | |
525 | } | |
526 | // Advance sequence number in data frame. | |
527 | //printk(KERN_WARNING "QoS Enalbed? %s\n", ieee->current_network.QoS_Enable?"Y":"N"); | |
528 | if (ieee->current_network.QoS_Enable) { | |
529 | if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF) | |
530 | ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0; | |
531 | else | |
532 | ieee->seq_ctrl[UP2AC(skb->priority) + 1]++; | |
533 | } else { | |
534 | if (ieee->seq_ctrl[0] == 0xFFF) | |
535 | ieee->seq_ctrl[0] = 0; | |
536 | else | |
537 | ieee->seq_ctrl[0]++; | |
538 | } | |
539 | //--- | |
540 | }else{ | |
541 | if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) { | |
542 | printk(KERN_WARNING "%s: skb too small (%d).\n", | |
543 | ieee->dev->name, skb->len); | |
544 | goto success; | |
545 | } | |
546 | ||
547 | txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC); | |
548 | if(!txb){ | |
549 | printk(KERN_WARNING "%s: Could not allocate TXB\n", | |
550 | ieee->dev->name); | |
551 | goto failed; | |
552 | } | |
553 | ||
554 | txb->encrypted = 0; | |
555 | txb->payload_size = skb->len; | |
556 | memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len); | |
557 | } | |
558 | ||
559 | success: | |
560 | spin_unlock_irqrestore(&ieee->lock, flags); | |
c8d86be3 GKH |
561 | dev_kfree_skb_any(skb); |
562 | if (txb) { | |
563 | if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){ | |
564 | ieee80211_softmac_xmit(txb, ieee); | |
565 | }else{ | |
566 | if ((*ieee->hard_start_xmit)(txb, dev) == 0) { | |
567 | stats->tx_packets++; | |
568 | stats->tx_bytes += txb->payload_size; | |
ec634fe3 | 569 | return NETDEV_TX_OK; |
c8d86be3 GKH |
570 | } |
571 | ieee80211_txb_free(txb); | |
572 | } | |
573 | } | |
574 | ||
ec634fe3 | 575 | return NETDEV_TX_OK; |
c8d86be3 GKH |
576 | |
577 | failed: | |
578 | spin_unlock_irqrestore(&ieee->lock, flags); | |
579 | netif_stop_queue(dev); | |
580 | stats->tx_errors++; | |
5b548140 | 581 | return NETDEV_TX_BUSY; |
c8d86be3 GKH |
582 | |
583 | } |