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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> | |
50 | #include <linux/version.h> | |
51 | #include <linux/wireless.h> | |
52 | #include <linux/etherdevice.h> | |
53 | #include <asm/uaccess.h> | |
54 | #include <linux/if_vlan.h> | |
55 | ||
56 | #include "ieee80211.h" | |
57 | ||
58 | ||
59 | /* | |
60 | ||
61 | ||
62 | 802.11 Data Frame | |
63 | ||
64 | ||
65 | 802.11 frame_contorl for data frames - 2 bytes | |
66 | ,-----------------------------------------------------------------------------------------. | |
67 | bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e | | |
68 | |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------| | |
69 | val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x | | |
70 | |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------| | |
71 | desc | ^-ver-^ | ^type-^ | ^-----subtype-----^ | to |from |more |retry| pwr |more |wep | | |
72 | | | | x=0 data,x=1 data+ack | DS | DS |frag | | mgm |data | | | |
73 | '-----------------------------------------------------------------------------------------' | |
74 | /\ | |
75 | | | |
76 | 802.11 Data Frame | | |
77 | ,--------- 'ctrl' expands to >-----------' | |
78 | | | |
79 | ,--'---,-------------------------------------------------------------. | |
80 | Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 | | |
81 | |------|------|---------|---------|---------|------|---------|------| | |
82 | Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs | | |
83 | | | tion | (BSSID) | | | ence | data | | | |
84 | `--------------------------------------------------| |------' | |
85 | Total: 28 non-data bytes `----.----' | |
86 | | | |
87 | .- 'Frame data' expands to <---------------------------' | |
88 | | | |
89 | V | |
90 | ,---------------------------------------------------. | |
91 | Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 | | |
92 | |------|------|---------|----------|------|---------| | |
93 | Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP | | |
94 | | DSAP | SSAP | | | | Packet | | |
95 | | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | | | |
96 | `-----------------------------------------| | | |
97 | Total: 8 non-data bytes `----.----' | |
98 | | | |
99 | .- 'IP Packet' expands, if WEP enabled, to <--' | |
100 | | | |
101 | V | |
102 | ,-----------------------. | |
103 | Bytes | 4 | 0-2296 | 4 | | |
104 | |-----|-----------|-----| | |
105 | Desc. | IV | Encrypted | ICV | | |
106 | | | IP Packet | | | |
107 | `-----------------------' | |
108 | Total: 8 non-data bytes | |
109 | ||
110 | ||
111 | 802.3 Ethernet Data Frame | |
112 | ||
113 | ,-----------------------------------------. | |
114 | Bytes | 6 | 6 | 2 | Variable | 4 | | |
115 | |-------|-------|------|-----------|------| | |
116 | Desc. | Dest. | Source| Type | IP Packet | fcs | | |
117 | | MAC | MAC | | | | | |
118 | `-----------------------------------------' | |
119 | Total: 18 non-data bytes | |
120 | ||
121 | In the event that fragmentation is required, the incoming payload is split into | |
122 | N parts of size ieee->fts. The first fragment contains the SNAP header and the | |
123 | remaining packets are just data. | |
124 | ||
125 | If encryption is enabled, each fragment payload size is reduced by enough space | |
126 | to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP) | |
127 | So if you have 1500 bytes of payload with ieee->fts set to 500 without | |
128 | encryption it will take 3 frames. With WEP it will take 4 frames as the | |
129 | payload of each frame is reduced to 492 bytes. | |
130 | ||
131 | * SKB visualization | |
132 | * | |
133 | * ,- skb->data | |
134 | * | | |
135 | * | ETHERNET HEADER ,-<-- PAYLOAD | |
136 | * | | 14 bytes from skb->data | |
137 | * | 2 bytes for Type --> ,T. | (sizeof ethhdr) | |
138 | * | | | | | |
139 | * |,-Dest.--. ,--Src.---. | | | | |
140 | * | 6 bytes| | 6 bytes | | | | | |
141 | * v | | | | | | | |
142 | * 0 | v 1 | v | v 2 | |
143 | * 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 | |
144 | * ^ | ^ | ^ | | |
145 | * | | | | | | | |
146 | * | | | | `T' <---- 2 bytes for Type | |
147 | * | | | | | |
148 | * | | '---SNAP--' <-------- 6 bytes for SNAP | |
149 | * | | | |
150 | * `-IV--' <-------------------- 4 bytes for IV (WEP) | |
151 | * | |
152 | * SNAP HEADER | |
153 | * | |
154 | */ | |
155 | ||
156 | static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 }; | |
157 | static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 }; | |
158 | ||
159 | static inline int ieee80211_put_snap(u8 *data, u16 h_proto) | |
160 | { | |
161 | struct ieee80211_snap_hdr *snap; | |
162 | u8 *oui; | |
163 | ||
164 | snap = (struct ieee80211_snap_hdr *)data; | |
165 | snap->dsap = 0xaa; | |
166 | snap->ssap = 0xaa; | |
167 | snap->ctrl = 0x03; | |
168 | ||
169 | if (h_proto == 0x8137 || h_proto == 0x80f3) | |
170 | oui = P802_1H_OUI; | |
171 | else | |
172 | oui = RFC1042_OUI; | |
173 | snap->oui[0] = oui[0]; | |
174 | snap->oui[1] = oui[1]; | |
175 | snap->oui[2] = oui[2]; | |
176 | ||
177 | *(u16 *)(data + SNAP_SIZE) = htons(h_proto); | |
178 | ||
179 | return SNAP_SIZE + sizeof(u16); | |
180 | } | |
181 | ||
182 | int ieee80211_encrypt_fragment( | |
183 | struct ieee80211_device *ieee, | |
184 | struct sk_buff *frag, | |
185 | int hdr_len) | |
186 | { | |
187 | struct ieee80211_crypt_data* crypt = ieee->crypt[ieee->tx_keyidx]; | |
188 | int res; | |
189 | ||
190 | /*added to care about null crypt condition, to solve that system hangs when shared keys error*/ | |
191 | if (!crypt || !crypt->ops) | |
192 | return -1; | |
193 | ||
194 | #ifdef CONFIG_IEEE80211_CRYPT_TKIP | |
195 | struct ieee80211_hdr *header; | |
196 | ||
197 | if (ieee->tkip_countermeasures && | |
198 | crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) { | |
199 | header = (struct ieee80211_hdr *) frag->data; | |
200 | if (net_ratelimit()) { | |
201 | printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " | |
202 | "TX packet to " MAC_FMT "\n", | |
203 | ieee->dev->name, MAC_ARG(header->addr1)); | |
204 | } | |
205 | return -1; | |
206 | } | |
207 | #endif | |
208 | /* To encrypt, frame format is: | |
209 | * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) */ | |
210 | ||
211 | // PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption. | |
212 | /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so | |
213 | * call both MSDU and MPDU encryption functions from here. */ | |
214 | atomic_inc(&crypt->refcnt); | |
215 | res = 0; | |
216 | if (crypt->ops->encrypt_msdu) | |
217 | res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv); | |
218 | if (res == 0 && crypt->ops->encrypt_mpdu) | |
219 | res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv); | |
220 | ||
221 | atomic_dec(&crypt->refcnt); | |
222 | if (res < 0) { | |
223 | printk(KERN_INFO "%s: Encryption failed: len=%d.\n", | |
224 | ieee->dev->name, frag->len); | |
225 | ieee->ieee_stats.tx_discards++; | |
226 | return -1; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | ||
233 | void ieee80211_txb_free(struct ieee80211_txb *txb) { | |
234 | int i; | |
235 | if (unlikely(!txb)) | |
236 | return; | |
237 | for (i = 0; i < txb->nr_frags; i++) | |
238 | if (txb->fragments[i]) | |
239 | dev_kfree_skb_any(txb->fragments[i]); | |
240 | kfree(txb); | |
241 | } | |
242 | ||
243 | struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size, | |
244 | int gfp_mask) | |
245 | { | |
246 | struct ieee80211_txb *txb; | |
247 | int i; | |
248 | txb = kmalloc( | |
249 | sizeof(struct ieee80211_txb) + (sizeof(u8*) * nr_frags), | |
250 | gfp_mask); | |
251 | if (!txb) | |
252 | return NULL; | |
253 | ||
254 | memset(txb, 0, sizeof(struct ieee80211_txb)); | |
255 | txb->nr_frags = nr_frags; | |
256 | txb->frag_size = txb_size; | |
257 | ||
258 | for (i = 0; i < nr_frags; i++) { | |
259 | txb->fragments[i] = dev_alloc_skb(txb_size); | |
260 | if (unlikely(!txb->fragments[i])) { | |
261 | i--; | |
262 | break; | |
263 | } | |
264 | } | |
265 | if (unlikely(i != nr_frags)) { | |
266 | while (i >= 0) | |
267 | dev_kfree_skb_any(txb->fragments[i--]); | |
268 | kfree(txb); | |
269 | return NULL; | |
270 | } | |
271 | return txb; | |
272 | } | |
273 | ||
274 | // Classify the to-be send data packet | |
275 | // Need to acquire the sent queue index. | |
276 | static int | |
277 | ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network) | |
278 | { | |
279 | struct ether_header *eh = (struct ether_header*)skb->data; | |
280 | unsigned int wme_UP = 0; | |
281 | ||
282 | if(!network->QoS_Enable) { | |
283 | skb->priority = 0; | |
284 | return(wme_UP); | |
285 | } | |
286 | ||
287 | if(eh->ether_type == __constant_htons(ETHERTYPE_IP)) { | |
288 | const struct iphdr *ih = (struct iphdr*)(skb->data + \ | |
289 | sizeof(struct ether_header)); | |
290 | wme_UP = (ih->tos >> 5)&0x07; | |
291 | } else if (vlan_tx_tag_present(skb)) {//vtag packet | |
292 | #ifndef VLAN_PRI_SHIFT | |
293 | #define VLAN_PRI_SHIFT 13 /* Shift to find VLAN user priority */ | |
294 | #define VLAN_PRI_MASK 7 /* Mask for user priority bits in VLAN */ | |
295 | #endif | |
296 | u32 tag = vlan_tx_tag_get(skb); | |
297 | wme_UP = (tag >> VLAN_PRI_SHIFT) & VLAN_PRI_MASK; | |
298 | } else if(ETH_P_PAE == ntohs(((struct ethhdr *)skb->data)->h_proto)) { | |
299 | //printk(KERN_WARNING "type = normal packet\n"); | |
300 | wme_UP = 7; | |
301 | } | |
302 | ||
303 | skb->priority = wme_UP; | |
304 | return(wme_UP); | |
305 | } | |
306 | ||
307 | #ifdef _RTL8187_EXT_PATCH_ | |
308 | // based on part of ieee80211_xmit. Mainly allocate txb. ieee->lock is held | |
309 | 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) | |
310 | { | |
311 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) | |
312 | struct ieee80211_device *ieee = netdev_priv(dev); | |
313 | #else | |
314 | struct ieee80211_device *ieee = (struct ieee80211_device *)dev->priv; | |
315 | #endif | |
316 | struct ieee80211_txb *txb = NULL; | |
317 | struct ieee80211_hdr_3addr *frag_hdr; | |
318 | int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size; | |
319 | int ether_type; | |
320 | int bytes, QOS_ctl; | |
321 | struct sk_buff *skb_frag; | |
322 | ||
323 | ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); | |
324 | ||
325 | /* Advance the SKB to the start of the payload */ | |
326 | skb_pull(skb, sizeof(struct ethhdr)); | |
327 | ||
328 | /* Determine total amount of storage required for TXB packets */ | |
329 | bytes = skb->len + SNAP_SIZE + sizeof(u16); | |
330 | ||
331 | /* Determine fragmentation size based on destination (multicast | |
332 | * and broadcast are not fragmented) */ | |
333 | // if (is_multicast_ether_addr(dest) || | |
334 | // is_broadcast_ether_addr(dest)) { | |
335 | if (is_multicast_ether_addr(header->addr1) || | |
336 | is_broadcast_ether_addr(header->addr1)) { | |
337 | frag_size = MAX_FRAG_THRESHOLD; | |
338 | QOS_ctl = QOS_CTL_NOTCONTAIN_ACK; | |
339 | } | |
340 | else { | |
341 | //printk(KERN_WARNING "&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&frag_size = %d\n", frag_size); | |
342 | frag_size = ieee->fts;//default:392 | |
343 | QOS_ctl = 0; | |
344 | } | |
345 | ||
346 | if(isQoS) { | |
347 | QOS_ctl |= skb->priority; //set in the ieee80211_classify | |
348 | *pQOS_ctl = cpu_to_le16(QOS_ctl); | |
349 | } | |
350 | //printk(KERN_WARNING "header size = %d, QOS_ctl = %x\n", hdr_len,QOS_ctl); | |
351 | /* Determine amount of payload per fragment. Regardless of if | |
352 | * this stack is providing the full 802.11 header, one will | |
353 | * eventually be affixed to this fragment -- so we must account for | |
354 | * it when determining the amount of payload space. */ | |
355 | //bytes_per_frag = frag_size - (IEEE80211_3ADDR_LEN + (ieee->current_network->QoS_Enable ? 2:0)); | |
356 | bytes_per_frag = frag_size - hdr_len; | |
357 | if (ieee->config & | |
358 | (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) | |
359 | bytes_per_frag -= IEEE80211_FCS_LEN; | |
360 | ||
361 | /* Each fragment may need to have room for encryptiong pre/postfix */ | |
362 | if (isEncrypt) | |
363 | bytes_per_frag -= crypt->ops->extra_prefix_len + | |
364 | crypt->ops->extra_postfix_len; | |
365 | ||
366 | /* Number of fragments is the total bytes_per_frag / | |
367 | * payload_per_fragment */ | |
368 | nr_frags = bytes / bytes_per_frag; | |
369 | bytes_last_frag = bytes % bytes_per_frag; | |
370 | if (bytes_last_frag) | |
371 | nr_frags++; | |
372 | else | |
373 | bytes_last_frag = bytes_per_frag; | |
374 | ||
375 | /* When we allocate the TXB we allocate enough space for the reserve | |
376 | * and full fragment bytes (bytes_per_frag doesn't include prefix, | |
377 | * postfix, header, FCS, etc.) */ | |
378 | txb = ieee80211_alloc_txb(nr_frags, frag_size, GFP_ATOMIC); | |
379 | if (unlikely(!txb)) { | |
380 | printk(KERN_WARNING "%s: Could not allocate TXB\n", | |
381 | ieee->dev->name); | |
382 | return NULL; | |
383 | } | |
384 | txb->encrypted = isEncrypt; | |
385 | txb->payload_size = bytes; | |
386 | ||
387 | for (i = 0; i < nr_frags; i++) { | |
388 | skb_frag = txb->fragments[i]; | |
389 | skb_frag->priority = UP2AC(skb->priority); | |
390 | if (isEncrypt) | |
391 | skb_reserve(skb_frag, crypt->ops->extra_prefix_len); | |
392 | ||
393 | frag_hdr = (struct ieee80211_hdr_3addr *)skb_put(skb_frag, hdr_len); | |
394 | memcpy(frag_hdr, (void *)header, hdr_len); | |
395 | ||
396 | /* If this is not the last fragment, then add the MOREFRAGS | |
397 | * bit to the frame control */ | |
398 | if (i != nr_frags - 1) { | |
399 | frag_hdr->frame_ctl = cpu_to_le16( | |
400 | header->frame_ctl | IEEE80211_FCTL_MOREFRAGS); | |
401 | bytes = bytes_per_frag; | |
402 | ||
403 | } else { | |
404 | /* The last fragment takes the remaining length */ | |
405 | bytes = bytes_last_frag; | |
406 | } | |
407 | ||
408 | frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i); | |
409 | //frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl<<4 | i); | |
410 | // | |
411 | ||
412 | /* Put a SNAP header on the first fragment */ | |
413 | if (i == 0) { | |
414 | ieee80211_put_snap( | |
415 | skb_put(skb_frag, SNAP_SIZE + sizeof(u16)), ether_type); | |
416 | bytes -= SNAP_SIZE + sizeof(u16); | |
417 | } | |
418 | ||
419 | memcpy(skb_put(skb_frag, bytes), skb->data, bytes); | |
420 | ||
421 | /* Advance the SKB... */ | |
422 | skb_pull(skb, bytes); | |
423 | ||
424 | /* Encryption routine will move the header forward in order | |
425 | * to insert the IV between the header and the payload */ | |
426 | if (isEncrypt) | |
427 | ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); | |
428 | if (ieee->config & | |
429 | (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) | |
430 | skb_put(skb_frag, 4); | |
431 | } | |
432 | // Advance sequence number in data frame. | |
433 | //printk(KERN_WARNING "QoS Enalbed? %s\n", ieee->current_network.QoS_Enable?"Y":"N"); | |
434 | if (ieee->seq_ctrl[0] == 0xFFF) | |
435 | ieee->seq_ctrl[0] = 0; | |
436 | else | |
437 | ieee->seq_ctrl[0]++; | |
438 | // stanley, just for debug | |
439 | /* | |
440 | { | |
441 | int j=0; | |
442 | for(j=0;j<nr_frags;j++) | |
443 | { | |
444 | int i; | |
445 | struct sk_buff *skb = txb->fragments[j]; | |
446 | printk("send(%d): ", j); | |
447 | for (i=0;i<skb->len;i++) | |
448 | printk("%02X ", skb->data[i]&0xff); | |
449 | printk("\n"); | |
450 | } | |
451 | } | |
452 | */ | |
453 | ||
454 | return txb; | |
455 | } | |
456 | ||
457 | ||
458 | // based on part of ieee80211_xmit. Mainly allocate txb. ieee->lock is held | |
459 | // Assume no encryption, no FCS computing | |
460 | 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) | |
461 | { | |
462 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) | |
463 | struct ieee80211_device *ieee = netdev_priv(dev); | |
464 | #else | |
465 | struct ieee80211_device *ieee = (struct ieee80211_device *)dev->priv; | |
466 | #endif | |
467 | struct ieee80211_txb *txb = NULL; | |
468 | struct ieee80211_hdr_3addr *frag_hdr; | |
469 | int ether_type; | |
470 | int bytes, QOS_ctl; | |
471 | ||
472 | ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); | |
473 | ||
474 | /* Advance the SKB to the start of the payload */ | |
475 | skb_pull(skb, sizeof(struct ethhdr)); | |
476 | ||
477 | /* Determine total amount of storage required for TXB packets */ | |
478 | bytes = skb->len + SNAP_SIZE + sizeof(u16); | |
479 | ||
480 | if (is_multicast_ether_addr(header->addr1) || | |
481 | is_broadcast_ether_addr(header->addr1)) { | |
482 | QOS_ctl = QOS_CTL_NOTCONTAIN_ACK; | |
483 | } | |
484 | else { | |
485 | QOS_ctl = 0; | |
486 | } | |
487 | ||
488 | if(isQoS) { | |
489 | QOS_ctl |= skb->priority; //set in the ieee80211_classify | |
490 | *pQOS_ctl = cpu_to_le16(QOS_ctl); | |
491 | } | |
492 | ||
493 | txb = kmalloc( sizeof(struct ieee80211_txb) + sizeof(u8*), GFP_ATOMIC ); | |
494 | if (unlikely(!txb)) { | |
495 | printk(KERN_WARNING "%s: Could not allocate TXB\n", | |
496 | ieee->dev->name); | |
497 | return NULL; | |
498 | } | |
499 | ||
500 | txb->nr_frags = 1; | |
501 | txb->frag_size = bytes; | |
502 | txb->encrypted = isEncrypt; | |
503 | txb->payload_size = bytes; | |
504 | ||
505 | txb->fragments[0] = skb; | |
506 | ieee80211_put_snap( | |
507 | skb_push(skb, SNAP_SIZE + sizeof(u16)), ether_type); | |
508 | frag_hdr = (struct ieee80211_hdr_3addr *)skb_push(skb, hdr_len); | |
509 | memcpy(frag_hdr, (void *)header, hdr_len); | |
510 | frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | 0); | |
511 | skb->priority = UP2AC(skb->priority); | |
512 | ||
513 | // Advance sequence number in data frame. | |
514 | //printk(KERN_WARNING "QoS Enalbed? %s\n", ieee->current_network.QoS_Enable?"Y":"N"); | |
515 | if (ieee->seq_ctrl[0] == 0xFFF) | |
516 | ieee->seq_ctrl[0] = 0; | |
517 | else | |
518 | ieee->seq_ctrl[0]++; | |
519 | ||
520 | return txb; | |
521 | } | |
522 | ||
523 | #endif // _RTL8187_EXT_PATCH_ | |
524 | ||
525 | /* SKBs are added to the ieee->tx_queue. */ | |
526 | int ieee80211_xmit(struct sk_buff *skb, | |
527 | struct net_device *dev) | |
528 | { | |
529 | struct ieee80211_device *ieee = netdev_priv(dev); | |
530 | struct ieee80211_txb *txb = NULL; | |
531 | struct ieee80211_hdr_3addr_QOS *frag_hdr; | |
532 | int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size; | |
533 | unsigned long flags; | |
534 | struct net_device_stats *stats = &ieee->stats; | |
535 | int ether_type, encrypt; | |
536 | int bytes, fc, QOS_ctl, hdr_len; | |
537 | struct sk_buff *skb_frag; | |
538 | //struct ieee80211_hdr header = { /* Ensure zero initialized */ | |
539 | // .duration_id = 0, | |
540 | // .seq_ctl = 0 | |
541 | //}; | |
542 | struct ieee80211_hdr_3addr_QOS header = { /* Ensure zero initialized */ | |
543 | .duration_id = 0, | |
544 | .seq_ctl = 0, | |
545 | .QOS_ctl = 0 | |
546 | }; | |
547 | u8 dest[ETH_ALEN], src[ETH_ALEN]; | |
548 | ||
549 | struct ieee80211_crypt_data* crypt; | |
550 | ||
551 | //printk(KERN_WARNING "upper layer packet!\n"); | |
552 | spin_lock_irqsave(&ieee->lock, flags); | |
553 | ||
554 | /* If there is no driver handler to take the TXB, dont' bother | |
555 | * creating it... */ | |
556 | if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))|| | |
557 | ((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) { | |
558 | printk(KERN_WARNING "%s: No xmit handler.\n", | |
559 | ieee->dev->name); | |
560 | goto success; | |
561 | } | |
562 | ||
563 | ieee80211_classify(skb,&ieee->current_network); | |
564 | if(likely(ieee->raw_tx == 0)){ | |
565 | ||
566 | if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) { | |
567 | printk(KERN_WARNING "%s: skb too small (%d).\n", | |
568 | ieee->dev->name, skb->len); | |
569 | goto success; | |
570 | } | |
571 | ||
572 | ||
573 | #ifdef _RTL8187_EXT_PATCH_ | |
574 | // note, skb->priority which was set by ieee80211_classify, and used by physical tx | |
575 | if((ieee->iw_mode == ieee->iw_ext_mode) && (ieee->ext_patch_ieee80211_xmit)) | |
576 | { | |
577 | txb = ieee->ext_patch_ieee80211_xmit(skb, dev); | |
578 | goto success; | |
579 | } | |
580 | #endif | |
581 | ||
582 | ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); | |
583 | ||
584 | crypt = ieee->crypt[ieee->tx_keyidx]; | |
585 | ||
586 | encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) && | |
587 | ieee->host_encrypt && crypt && crypt->ops; | |
588 | ||
589 | if (!encrypt && ieee->ieee802_1x && | |
590 | ieee->drop_unencrypted && ether_type != ETH_P_PAE) { | |
591 | stats->tx_dropped++; | |
592 | goto success; | |
593 | } | |
594 | ||
595 | #ifdef CONFIG_IEEE80211_DEBUG | |
596 | if (crypt && !encrypt && ether_type == ETH_P_PAE) { | |
597 | struct eapol *eap = (struct eapol *)(skb->data + | |
598 | sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16)); | |
599 | IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n", | |
600 | eap_get_type(eap->type)); | |
601 | } | |
602 | #endif | |
603 | ||
604 | /* Save source and destination addresses */ | |
605 | memcpy(&dest, skb->data, ETH_ALEN); | |
606 | memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN); | |
607 | ||
608 | /* Advance the SKB to the start of the payload */ | |
609 | skb_pull(skb, sizeof(struct ethhdr)); | |
610 | ||
611 | /* Determine total amount of storage required for TXB packets */ | |
612 | bytes = skb->len + SNAP_SIZE + sizeof(u16); | |
613 | ||
614 | if(ieee->current_network.QoS_Enable) { | |
615 | if (encrypt) | |
616 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA | | |
617 | IEEE80211_FCTL_WEP; | |
618 | else | |
619 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA; | |
620 | ||
621 | } else { | |
622 | if (encrypt) | |
623 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA | | |
624 | IEEE80211_FCTL_WEP; | |
625 | else | |
626 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; | |
627 | } | |
628 | ||
629 | if (ieee->iw_mode == IW_MODE_INFRA) { | |
630 | fc |= IEEE80211_FCTL_TODS; | |
631 | /* To DS: Addr1 = BSSID, Addr2 = SA, | |
632 | Addr3 = DA */ | |
633 | memcpy(&header.addr1, ieee->current_network.bssid, ETH_ALEN); | |
634 | memcpy(&header.addr2, &src, ETH_ALEN); | |
635 | memcpy(&header.addr3, &dest, ETH_ALEN); | |
636 | } else if (ieee->iw_mode == IW_MODE_ADHOC) { | |
637 | /* not From/To DS: Addr1 = DA, Addr2 = SA, | |
638 | Addr3 = BSSID */ | |
639 | memcpy(&header.addr1, dest, ETH_ALEN); | |
640 | memcpy(&header.addr2, src, ETH_ALEN); | |
641 | memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN); | |
642 | } | |
643 | // printk(KERN_WARNING "essid MAC address is "MAC_FMT, MAC_ARG(&header.addr1)); | |
644 | header.frame_ctl = cpu_to_le16(fc); | |
645 | //hdr_len = IEEE80211_3ADDR_LEN; | |
646 | ||
647 | /* Determine fragmentation size based on destination (multicast | |
648 | * and broadcast are not fragmented) */ | |
649 | // if (is_multicast_ether_addr(dest) || | |
650 | // is_broadcast_ether_addr(dest)) { | |
651 | if (is_multicast_ether_addr(header.addr1) || | |
652 | is_broadcast_ether_addr(header.addr1)) { | |
653 | frag_size = MAX_FRAG_THRESHOLD; | |
654 | QOS_ctl = QOS_CTL_NOTCONTAIN_ACK; | |
655 | } | |
656 | else { | |
657 | //printk(KERN_WARNING "&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&frag_size = %d\n", frag_size); | |
658 | frag_size = ieee->fts;//default:392 | |
659 | QOS_ctl = 0; | |
660 | } | |
661 | ||
662 | if (ieee->current_network.QoS_Enable) { | |
663 | hdr_len = IEEE80211_3ADDR_LEN + 2; | |
664 | QOS_ctl |= skb->priority; //set in the ieee80211_classify | |
665 | header.QOS_ctl = cpu_to_le16(QOS_ctl); | |
666 | } else { | |
667 | hdr_len = IEEE80211_3ADDR_LEN; | |
668 | } | |
669 | //printk(KERN_WARNING "header size = %d, QOS_ctl = %x\n", hdr_len,QOS_ctl); | |
670 | /* Determine amount of payload per fragment. Regardless of if | |
671 | * this stack is providing the full 802.11 header, one will | |
672 | * eventually be affixed to this fragment -- so we must account for | |
673 | * it when determining the amount of payload space. */ | |
674 | //bytes_per_frag = frag_size - (IEEE80211_3ADDR_LEN + (ieee->current_network->QoS_Enable ? 2:0)); | |
675 | bytes_per_frag = frag_size - hdr_len; | |
676 | if (ieee->config & | |
677 | (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) | |
678 | bytes_per_frag -= IEEE80211_FCS_LEN; | |
679 | ||
680 | /* Each fragment may need to have room for encryptiong pre/postfix */ | |
681 | if (encrypt) | |
682 | bytes_per_frag -= crypt->ops->extra_prefix_len + | |
683 | crypt->ops->extra_postfix_len; | |
684 | ||
685 | /* Number of fragments is the total bytes_per_frag / | |
686 | * payload_per_fragment */ | |
687 | nr_frags = bytes / bytes_per_frag; | |
688 | bytes_last_frag = bytes % bytes_per_frag; | |
689 | if (bytes_last_frag) | |
690 | nr_frags++; | |
691 | else | |
692 | bytes_last_frag = bytes_per_frag; | |
693 | ||
694 | /* When we allocate the TXB we allocate enough space for the reserve | |
695 | * and full fragment bytes (bytes_per_frag doesn't include prefix, | |
696 | * postfix, header, FCS, etc.) */ | |
697 | txb = ieee80211_alloc_txb(nr_frags, frag_size, GFP_ATOMIC); | |
698 | if (unlikely(!txb)) { | |
699 | printk(KERN_WARNING "%s: Could not allocate TXB\n", | |
700 | ieee->dev->name); | |
701 | goto failed; | |
702 | } | |
703 | txb->encrypted = encrypt; | |
704 | txb->payload_size = bytes; | |
705 | ||
706 | for (i = 0; i < nr_frags; i++) { | |
707 | skb_frag = txb->fragments[i]; | |
708 | skb_frag->priority = UP2AC(skb->priority); | |
709 | if (encrypt) | |
710 | skb_reserve(skb_frag, crypt->ops->extra_prefix_len); | |
711 | ||
712 | frag_hdr = (struct ieee80211_hdr_3addr_QOS *)skb_put(skb_frag, hdr_len); | |
713 | memcpy(frag_hdr, &header, hdr_len); | |
714 | ||
715 | /* If this is not the last fragment, then add the MOREFRAGS | |
716 | * bit to the frame control */ | |
717 | if (i != nr_frags - 1) { | |
718 | frag_hdr->frame_ctl = cpu_to_le16( | |
719 | fc | IEEE80211_FCTL_MOREFRAGS); | |
720 | bytes = bytes_per_frag; | |
721 | ||
722 | } else { | |
723 | /* The last fragment takes the remaining length */ | |
724 | bytes = bytes_last_frag; | |
725 | } | |
726 | if(ieee->current_network.QoS_Enable) { | |
727 | // add 1 only indicate to corresponding seq number control 2006/7/12 | |
728 | frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i); | |
729 | //printk(KERN_WARNING "skb->priority = %d,", skb->priority); | |
730 | //printk(KERN_WARNING "type:%d: seq = %d\n",UP2AC(skb->priority),ieee->seq_ctrl[UP2AC(skb->priority)+1]); | |
731 | } else { | |
732 | frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i); | |
733 | } | |
734 | //frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl<<4 | i); | |
735 | // | |
736 | ||
737 | /* Put a SNAP header on the first fragment */ | |
738 | if (i == 0) { | |
739 | ieee80211_put_snap( | |
740 | skb_put(skb_frag, SNAP_SIZE + sizeof(u16)), | |
741 | ether_type); | |
742 | bytes -= SNAP_SIZE + sizeof(u16); | |
743 | } | |
744 | ||
745 | memcpy(skb_put(skb_frag, bytes), skb->data, bytes); | |
746 | ||
747 | /* Advance the SKB... */ | |
748 | skb_pull(skb, bytes); | |
749 | ||
750 | /* Encryption routine will move the header forward in order | |
751 | * to insert the IV between the header and the payload */ | |
752 | if (encrypt) | |
753 | ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); | |
754 | if (ieee->config & | |
755 | (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) | |
756 | skb_put(skb_frag, 4); | |
757 | } | |
758 | // Advance sequence number in data frame. | |
759 | //printk(KERN_WARNING "QoS Enalbed? %s\n", ieee->current_network.QoS_Enable?"Y":"N"); | |
760 | if (ieee->current_network.QoS_Enable) { | |
761 | if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF) | |
762 | ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0; | |
763 | else | |
764 | ieee->seq_ctrl[UP2AC(skb->priority) + 1]++; | |
765 | } else { | |
766 | if (ieee->seq_ctrl[0] == 0xFFF) | |
767 | ieee->seq_ctrl[0] = 0; | |
768 | else | |
769 | ieee->seq_ctrl[0]++; | |
770 | } | |
771 | //--- | |
772 | }else{ | |
773 | if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) { | |
774 | printk(KERN_WARNING "%s: skb too small (%d).\n", | |
775 | ieee->dev->name, skb->len); | |
776 | goto success; | |
777 | } | |
778 | ||
779 | txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC); | |
780 | if(!txb){ | |
781 | printk(KERN_WARNING "%s: Could not allocate TXB\n", | |
782 | ieee->dev->name); | |
783 | goto failed; | |
784 | } | |
785 | ||
786 | txb->encrypted = 0; | |
787 | txb->payload_size = skb->len; | |
788 | memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len); | |
789 | } | |
790 | ||
791 | success: | |
792 | spin_unlock_irqrestore(&ieee->lock, flags); | |
793 | #ifdef _RTL8187_EXT_PATCH_ | |
794 | // Sometimes, extension mode can reuse skb (by txb->fragments[0]) | |
795 | if( ! ((ieee->iw_mode == ieee->iw_ext_mode) && txb && (txb->fragments[0] == skb)) ) | |
796 | #endif | |
797 | dev_kfree_skb_any(skb); | |
798 | if (txb) { | |
799 | if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){ | |
800 | ieee80211_softmac_xmit(txb, ieee); | |
801 | }else{ | |
802 | if ((*ieee->hard_start_xmit)(txb, dev) == 0) { | |
803 | stats->tx_packets++; | |
804 | stats->tx_bytes += txb->payload_size; | |
805 | return 0; | |
806 | } | |
807 | ieee80211_txb_free(txb); | |
808 | } | |
809 | } | |
810 | ||
811 | return 0; | |
812 | ||
813 | failed: | |
814 | spin_unlock_irqrestore(&ieee->lock, flags); | |
815 | netif_stop_queue(dev); | |
816 | stats->tx_errors++; | |
5b548140 | 817 | return NETDEV_TX_BUSY; |
c8d86be3 GKH |
818 | |
819 | } | |
820 | ||
821 | #if 0 | |
822 | EXPORT_SYMBOL(ieee80211_txb_free); | |
823 | #ifdef _RTL8187_EXT_PATCH_ | |
824 | EXPORT_SYMBOL(ieee80211_alloc_txb); | |
825 | EXPORT_SYMBOL(ieee80211_ext_alloc_txb); | |
826 | EXPORT_SYMBOL(ieee80211_ext_reuse_txb); | |
827 | #endif // _RTL8187_EXT_PATCH_ | |
828 | #endif |