blob: 79cf55338d88e986e1a45f4bf62ebf145e6afff6 [file] [log] [blame]
Jouni Malinenff1d2762005-05-12 22:54:16 -04001void hostap_dump_tx_80211(const char *name, struct sk_buff *skb)
2{
Jouni Malinenc0f72ca2005-08-14 19:08:43 -07003 struct ieee80211_hdr *hdr;
Jouni Malinenff1d2762005-05-12 22:54:16 -04004 u16 fc;
5
Jouni Malinenc0f72ca2005-08-14 19:08:43 -07006 hdr = (struct ieee80211_hdr *) skb->data;
Jouni Malinenff1d2762005-05-12 22:54:16 -04007
8 printk(KERN_DEBUG "%s: TX len=%d jiffies=%ld\n",
9 name, skb->len, jiffies);
10
11 if (skb->len < 2)
12 return;
13
Jouni Malinenc0f72ca2005-08-14 19:08:43 -070014 fc = le16_to_cpu(hdr->frame_ctl);
Jouni Malinenff1d2762005-05-12 22:54:16 -040015 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d)%s%s",
Jouni Malinen4339d322005-08-14 19:08:44 -070016 fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
Jouni Malinenff1d2762005-05-12 22:54:16 -040017 fc & WLAN_FC_TODS ? " [ToDS]" : "",
18 fc & WLAN_FC_FROMDS ? " [FromDS]" : "");
19
20 if (skb->len < IEEE80211_DATA_HDR3_LEN) {
21 printk("\n");
22 return;
23 }
24
25 printk(" dur=0x%04x seq=0x%04x\n", le16_to_cpu(hdr->duration_id),
Jouni Malinenc0f72ca2005-08-14 19:08:43 -070026 le16_to_cpu(hdr->seq_ctl));
Jouni Malinenff1d2762005-05-12 22:54:16 -040027
28 printk(KERN_DEBUG " A1=" MACSTR " A2=" MACSTR " A3=" MACSTR,
29 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2), MAC2STR(hdr->addr3));
30 if (skb->len >= 30)
31 printk(" A4=" MACSTR, MAC2STR(hdr->addr4));
32 printk("\n");
33}
34
35
36/* hard_start_xmit function for data interfaces (wlan#, wlan#wds#, wlan#sta)
37 * Convert Ethernet header into a suitable IEEE 802.11 header depending on
38 * device configuration. */
39int hostap_data_start_xmit(struct sk_buff *skb, struct net_device *dev)
40{
41 struct hostap_interface *iface;
42 local_info_t *local;
43 int need_headroom, need_tailroom = 0;
Jouni Malinenc0f72ca2005-08-14 19:08:43 -070044 struct ieee80211_hdr hdr;
Jouni Malinenff1d2762005-05-12 22:54:16 -040045 u16 fc, ethertype = 0;
46 enum {
47 WDS_NO = 0, WDS_OWN_FRAME, WDS_COMPLIANT_FRAME
48 } use_wds = WDS_NO;
49 u8 *encaps_data;
50 int hdr_len, encaps_len, skip_header_bytes;
51 int to_assoc_ap = 0;
52 struct hostap_skb_tx_data *meta;
53
54 iface = netdev_priv(dev);
55 local = iface->local;
56
57 if (skb->len < ETH_HLEN) {
58 printk(KERN_DEBUG "%s: hostap_data_start_xmit: short skb "
59 "(len=%d)\n", dev->name, skb->len);
60 kfree_skb(skb);
61 return 0;
62 }
63
64 if (local->ddev != dev) {
65 use_wds = (local->iw_mode == IW_MODE_MASTER &&
66 !(local->wds_type & HOSTAP_WDS_STANDARD_FRAME)) ?
67 WDS_OWN_FRAME : WDS_COMPLIANT_FRAME;
68 if (dev == local->stadev) {
69 to_assoc_ap = 1;
70 use_wds = WDS_NO;
71 } else if (dev == local->apdev) {
72 printk(KERN_DEBUG "%s: prism2_tx: trying to use "
73 "AP device with Ethernet net dev\n", dev->name);
74 kfree_skb(skb);
75 return 0;
76 }
77 } else {
78 if (local->iw_mode == IW_MODE_REPEAT) {
79 printk(KERN_DEBUG "%s: prism2_tx: trying to use "
80 "non-WDS link in Repeater mode\n", dev->name);
81 kfree_skb(skb);
82 return 0;
83 } else if (local->iw_mode == IW_MODE_INFRA &&
84 (local->wds_type & HOSTAP_WDS_AP_CLIENT) &&
85 memcmp(skb->data + ETH_ALEN, dev->dev_addr,
86 ETH_ALEN) != 0) {
87 /* AP client mode: send frames with foreign src addr
88 * using 4-addr WDS frames */
89 use_wds = WDS_COMPLIANT_FRAME;
90 }
91 }
92
93 /* Incoming skb->data: dst_addr[6], src_addr[6], proto[2], payload
94 * ==>
95 * Prism2 TX frame with 802.11 header:
96 * txdesc (address order depending on used mode; includes dst_addr and
97 * src_addr), possible encapsulation (RFC1042/Bridge-Tunnel;
98 * proto[2], payload {, possible addr4[6]} */
99
100 ethertype = (skb->data[12] << 8) | skb->data[13];
101
102 memset(&hdr, 0, sizeof(hdr));
103
104 /* Length of data after IEEE 802.11 header */
105 encaps_data = NULL;
106 encaps_len = 0;
107 skip_header_bytes = ETH_HLEN;
108 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
109 encaps_data = bridge_tunnel_header;
110 encaps_len = sizeof(bridge_tunnel_header);
111 skip_header_bytes -= 2;
112 } else if (ethertype >= 0x600) {
113 encaps_data = rfc1042_header;
114 encaps_len = sizeof(rfc1042_header);
115 skip_header_bytes -= 2;
116 }
117
Jouni Malinen4339d322005-08-14 19:08:44 -0700118 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
Jouni Malinenff1d2762005-05-12 22:54:16 -0400119 hdr_len = IEEE80211_DATA_HDR3_LEN;
120
121 if (use_wds != WDS_NO) {
122 /* Note! Prism2 station firmware has problems with sending real
123 * 802.11 frames with four addresses; until these problems can
124 * be fixed or worked around, 4-addr frames needed for WDS are
125 * using incompatible format: FromDS flag is not set and the
126 * fourth address is added after the frame payload; it is
127 * assumed, that the receiving station knows how to handle this
128 * frame format */
129
130 if (use_wds == WDS_COMPLIANT_FRAME) {
131 fc |= WLAN_FC_FROMDS | WLAN_FC_TODS;
132 /* From&To DS: Addr1 = RA, Addr2 = TA, Addr3 = DA,
133 * Addr4 = SA */
134 memcpy(&hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
135 hdr_len += ETH_ALEN;
136 } else {
137 /* bogus 4-addr format to workaround Prism2 station
138 * f/w bug */
139 fc |= WLAN_FC_TODS;
140 /* From DS: Addr1 = DA (used as RA),
141 * Addr2 = BSSID (used as TA), Addr3 = SA (used as DA),
142 */
143
144 /* SA from skb->data + ETH_ALEN will be added after
145 * frame payload; use hdr.addr4 as a temporary buffer
146 */
147 memcpy(&hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
148 need_tailroom += ETH_ALEN;
149 }
150
151 /* send broadcast and multicast frames to broadcast RA, if
152 * configured; otherwise, use unicast RA of the WDS link */
153 if ((local->wds_type & HOSTAP_WDS_BROADCAST_RA) &&
154 skb->data[0] & 0x01)
155 memset(&hdr.addr1, 0xff, ETH_ALEN);
156 else if (iface->type == HOSTAP_INTERFACE_WDS)
157 memcpy(&hdr.addr1, iface->u.wds.remote_addr,
158 ETH_ALEN);
159 else
160 memcpy(&hdr.addr1, local->bssid, ETH_ALEN);
161 memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN);
162 memcpy(&hdr.addr3, skb->data, ETH_ALEN);
163 } else if (local->iw_mode == IW_MODE_MASTER && !to_assoc_ap) {
164 fc |= WLAN_FC_FROMDS;
165 /* From DS: Addr1 = DA, Addr2 = BSSID, Addr3 = SA */
166 memcpy(&hdr.addr1, skb->data, ETH_ALEN);
167 memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN);
168 memcpy(&hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
169 } else if (local->iw_mode == IW_MODE_INFRA || to_assoc_ap) {
170 fc |= WLAN_FC_TODS;
171 /* To DS: Addr1 = BSSID, Addr2 = SA, Addr3 = DA */
172 memcpy(&hdr.addr1, to_assoc_ap ?
173 local->assoc_ap_addr : local->bssid, ETH_ALEN);
174 memcpy(&hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
175 memcpy(&hdr.addr3, skb->data, ETH_ALEN);
176 } else if (local->iw_mode == IW_MODE_ADHOC) {
177 /* not From/To DS: Addr1 = DA, Addr2 = SA, Addr3 = BSSID */
178 memcpy(&hdr.addr1, skb->data, ETH_ALEN);
179 memcpy(&hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
180 memcpy(&hdr.addr3, local->bssid, ETH_ALEN);
181 }
182
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700183 hdr.frame_ctl = cpu_to_le16(fc);
Jouni Malinenff1d2762005-05-12 22:54:16 -0400184
185 skb_pull(skb, skip_header_bytes);
186 need_headroom = local->func->need_tx_headroom + hdr_len + encaps_len;
187 if (skb_tailroom(skb) < need_tailroom) {
188 skb = skb_unshare(skb, GFP_ATOMIC);
189 if (skb == NULL) {
190 iface->stats.tx_dropped++;
191 return 0;
192 }
193 if (pskb_expand_head(skb, need_headroom, need_tailroom,
194 GFP_ATOMIC)) {
195 kfree_skb(skb);
196 iface->stats.tx_dropped++;
197 return 0;
198 }
199 } else if (skb_headroom(skb) < need_headroom) {
200 struct sk_buff *tmp = skb;
201 skb = skb_realloc_headroom(skb, need_headroom);
202 kfree_skb(tmp);
203 if (skb == NULL) {
204 iface->stats.tx_dropped++;
205 return 0;
206 }
207 } else {
208 skb = skb_unshare(skb, GFP_ATOMIC);
209 if (skb == NULL) {
210 iface->stats.tx_dropped++;
211 return 0;
212 }
213 }
214
215 if (encaps_data)
216 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
217 memcpy(skb_push(skb, hdr_len), &hdr, hdr_len);
218 if (use_wds == WDS_OWN_FRAME) {
219 memcpy(skb_put(skb, ETH_ALEN), &hdr.addr4, ETH_ALEN);
220 }
221
222 iface->stats.tx_packets++;
223 iface->stats.tx_bytes += skb->len;
224
225 skb->mac.raw = skb->data;
226 meta = (struct hostap_skb_tx_data *) skb->cb;
227 memset(meta, 0, sizeof(*meta));
228 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
Jouni Malinen5bee7202005-08-14 19:08:39 -0700229 if (use_wds)
230 meta->flags |= HOSTAP_TX_FLAGS_WDS;
Jouni Malinenff1d2762005-05-12 22:54:16 -0400231 meta->ethertype = ethertype;
232 meta->iface = iface;
233
234 /* Send IEEE 802.11 encapsulated frame using the master radio device */
235 skb->dev = local->dev;
236 dev_queue_xmit(skb);
237 return 0;
238}
239
240
241/* hard_start_xmit function for hostapd wlan#ap interfaces */
242int hostap_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev)
243{
244 struct hostap_interface *iface;
245 local_info_t *local;
246 struct hostap_skb_tx_data *meta;
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700247 struct ieee80211_hdr *hdr;
Jouni Malinenff1d2762005-05-12 22:54:16 -0400248 u16 fc;
249
250 iface = netdev_priv(dev);
251 local = iface->local;
252
253 if (skb->len < 10) {
254 printk(KERN_DEBUG "%s: hostap_mgmt_start_xmit: short skb "
255 "(len=%d)\n", dev->name, skb->len);
256 kfree_skb(skb);
257 return 0;
258 }
259
260 iface->stats.tx_packets++;
261 iface->stats.tx_bytes += skb->len;
262
263 meta = (struct hostap_skb_tx_data *) skb->cb;
264 memset(meta, 0, sizeof(*meta));
265 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
266 meta->iface = iface;
267
268 if (skb->len >= IEEE80211_DATA_HDR3_LEN + sizeof(rfc1042_header) + 2) {
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700269 hdr = (struct ieee80211_hdr *) skb->data;
270 fc = le16_to_cpu(hdr->frame_ctl);
Jouni Malinen4339d322005-08-14 19:08:44 -0700271 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
272 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_DATA) {
Jouni Malinenff1d2762005-05-12 22:54:16 -0400273 u8 *pos = &skb->data[IEEE80211_DATA_HDR3_LEN +
274 sizeof(rfc1042_header)];
275 meta->ethertype = (pos[0] << 8) | pos[1];
276 }
277 }
278
279 /* Send IEEE 802.11 encapsulated frame using the master radio device */
280 skb->dev = local->dev;
281 dev_queue_xmit(skb);
282 return 0;
283}
284
285
286/* Called only from software IRQ */
287struct sk_buff * hostap_tx_encrypt(struct sk_buff *skb,
Jouni Malinen62fe7e32005-07-30 20:43:20 -0700288 struct ieee80211_crypt_data *crypt)
Jouni Malinenff1d2762005-05-12 22:54:16 -0400289{
290 struct hostap_interface *iface;
291 local_info_t *local;
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700292 struct ieee80211_hdr *hdr;
Jouni Malinenff1d2762005-05-12 22:54:16 -0400293 u16 fc;
294 int hdr_len, res;
295
296 iface = netdev_priv(skb->dev);
297 local = iface->local;
298
299 if (skb->len < IEEE80211_DATA_HDR3_LEN) {
300 kfree_skb(skb);
301 return NULL;
302 }
303
304 if (local->tkip_countermeasures &&
305 crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) {
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700306 hdr = (struct ieee80211_hdr *) skb->data;
Jouni Malinenff1d2762005-05-12 22:54:16 -0400307 if (net_ratelimit()) {
308 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
309 "TX packet to " MACSTR "\n",
310 local->dev->name, MAC2STR(hdr->addr1));
311 }
312 kfree_skb(skb);
313 return NULL;
314 }
315
316 skb = skb_unshare(skb, GFP_ATOMIC);
317 if (skb == NULL)
318 return NULL;
319
320 if ((skb_headroom(skb) < crypt->ops->extra_prefix_len ||
321 skb_tailroom(skb) < crypt->ops->extra_postfix_len) &&
322 pskb_expand_head(skb, crypt->ops->extra_prefix_len,
323 crypt->ops->extra_postfix_len, GFP_ATOMIC)) {
324 kfree_skb(skb);
325 return NULL;
326 }
327
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700328 hdr = (struct ieee80211_hdr *) skb->data;
329 fc = le16_to_cpu(hdr->frame_ctl);
Jouni Malinenff1d2762005-05-12 22:54:16 -0400330 hdr_len = hostap_80211_get_hdrlen(fc);
331
332 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
333 * call both MSDU and MPDU encryption functions from here. */
334 atomic_inc(&crypt->refcnt);
335 res = 0;
336 if (crypt->ops->encrypt_msdu)
337 res = crypt->ops->encrypt_msdu(skb, hdr_len, crypt->priv);
338 if (res == 0 && crypt->ops->encrypt_mpdu)
339 res = crypt->ops->encrypt_mpdu(skb, hdr_len, crypt->priv);
340 atomic_dec(&crypt->refcnt);
341 if (res < 0) {
342 kfree_skb(skb);
343 return NULL;
344 }
345
346 return skb;
347}
348
349
350/* hard_start_xmit function for master radio interface wifi#.
351 * AP processing (TX rate control, power save buffering, etc.).
352 * Use hardware TX function to send the frame. */
353int hostap_master_start_xmit(struct sk_buff *skb, struct net_device *dev)
354{
355 struct hostap_interface *iface;
356 local_info_t *local;
357 int ret = 1;
358 u16 fc;
359 struct hostap_tx_data tx;
360 ap_tx_ret tx_ret;
361 struct hostap_skb_tx_data *meta;
362 int no_encrypt = 0;
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700363 struct ieee80211_hdr *hdr;
Jouni Malinenff1d2762005-05-12 22:54:16 -0400364
365 iface = netdev_priv(dev);
366 local = iface->local;
367
368 tx.skb = skb;
369 tx.sta_ptr = NULL;
370
371 meta = (struct hostap_skb_tx_data *) skb->cb;
372 if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) {
373 printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, "
374 "expected 0x%08x)\n",
375 dev->name, meta->magic, HOSTAP_SKB_TX_DATA_MAGIC);
376 ret = 0;
377 iface->stats.tx_dropped++;
378 goto fail;
379 }
380
381 if (local->host_encrypt) {
382 /* Set crypt to default algorithm and key; will be replaced in
383 * AP code if STA has own alg/key */
384 tx.crypt = local->crypt[local->tx_keyidx];
385 tx.host_encrypt = 1;
386 } else {
387 tx.crypt = NULL;
388 tx.host_encrypt = 0;
389 }
390
391 if (skb->len < 24) {
392 printk(KERN_DEBUG "%s: hostap_master_start_xmit: short skb "
393 "(len=%d)\n", dev->name, skb->len);
394 ret = 0;
395 iface->stats.tx_dropped++;
396 goto fail;
397 }
398
399 /* FIX (?):
400 * Wi-Fi 802.11b test plan suggests that AP should ignore power save
401 * bit in authentication and (re)association frames and assume tha
402 * STA remains awake for the response. */
403 tx_ret = hostap_handle_sta_tx(local, &tx);
404 skb = tx.skb;
405 meta = (struct hostap_skb_tx_data *) skb->cb;
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700406 hdr = (struct ieee80211_hdr *) skb->data;
407 fc = le16_to_cpu(hdr->frame_ctl);
Jouni Malinenff1d2762005-05-12 22:54:16 -0400408 switch (tx_ret) {
409 case AP_TX_CONTINUE:
410 break;
411 case AP_TX_CONTINUE_NOT_AUTHORIZED:
412 if (local->ieee_802_1x &&
Jouni Malinen4339d322005-08-14 19:08:44 -0700413 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
Jouni Malinen5bee7202005-08-14 19:08:39 -0700414 meta->ethertype != ETH_P_PAE &&
415 !(meta->flags & HOSTAP_TX_FLAGS_WDS)) {
Jouni Malinenff1d2762005-05-12 22:54:16 -0400416 printk(KERN_DEBUG "%s: dropped frame to unauthorized "
417 "port (IEEE 802.1X): ethertype=0x%04x\n",
418 dev->name, meta->ethertype);
419 hostap_dump_tx_80211(dev->name, skb);
420
421 ret = 0; /* drop packet */
422 iface->stats.tx_dropped++;
423 goto fail;
424 }
425 break;
426 case AP_TX_DROP:
427 ret = 0; /* drop packet */
428 iface->stats.tx_dropped++;
429 goto fail;
430 case AP_TX_RETRY:
431 goto fail;
432 case AP_TX_BUFFERED:
433 /* do not free skb here, it will be freed when the
434 * buffered frame is sent/timed out */
435 ret = 0;
436 goto tx_exit;
437 }
438
439 /* Request TX callback if protocol version is 2 in 802.11 header;
440 * this version 2 is a special case used between hostapd and kernel
441 * driver */
442 if (((fc & WLAN_FC_PVER) == BIT(1)) &&
443 local->ap && local->ap->tx_callback_idx && meta->tx_cb_idx == 0) {
444 meta->tx_cb_idx = local->ap->tx_callback_idx;
445
446 /* remove special version from the frame header */
447 fc &= ~WLAN_FC_PVER;
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700448 hdr->frame_ctl = cpu_to_le16(fc);
Jouni Malinenff1d2762005-05-12 22:54:16 -0400449 }
450
Jouni Malinen4339d322005-08-14 19:08:44 -0700451 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_DATA) {
Jouni Malinenff1d2762005-05-12 22:54:16 -0400452 no_encrypt = 1;
453 tx.crypt = NULL;
454 }
455
456 if (local->ieee_802_1x && meta->ethertype == ETH_P_PAE && tx.crypt &&
457 !(fc & WLAN_FC_ISWEP)) {
458 no_encrypt = 1;
459 PDEBUG(DEBUG_EXTRA2, "%s: TX: IEEE 802.1X - passing "
460 "unencrypted EAPOL frame\n", dev->name);
461 tx.crypt = NULL; /* no encryption for IEEE 802.1X frames */
462 }
463
464 if (tx.crypt && (!tx.crypt->ops || !tx.crypt->ops->encrypt_mpdu))
465 tx.crypt = NULL;
466 else if ((tx.crypt || local->crypt[local->tx_keyidx]) && !no_encrypt) {
467 /* Add ISWEP flag both for firmware and host based encryption
468 */
469 fc |= WLAN_FC_ISWEP;
Jouni Malinenc0f72ca2005-08-14 19:08:43 -0700470 hdr->frame_ctl = cpu_to_le16(fc);
Jouni Malinenff1d2762005-05-12 22:54:16 -0400471 } else if (local->drop_unencrypted &&
Jouni Malinen4339d322005-08-14 19:08:44 -0700472 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
Jouni Malinenff1d2762005-05-12 22:54:16 -0400473 meta->ethertype != ETH_P_PAE) {
474 if (net_ratelimit()) {
475 printk(KERN_DEBUG "%s: dropped unencrypted TX data "
476 "frame (drop_unencrypted=1)\n", dev->name);
477 }
478 iface->stats.tx_dropped++;
479 ret = 0;
480 goto fail;
481 }
482
483 if (tx.crypt) {
484 skb = hostap_tx_encrypt(skb, tx.crypt);
485 if (skb == NULL) {
486 printk(KERN_DEBUG "%s: TX - encryption failed\n",
487 dev->name);
488 ret = 0;
489 goto fail;
490 }
491 meta = (struct hostap_skb_tx_data *) skb->cb;
492 if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) {
493 printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, "
494 "expected 0x%08x) after hostap_tx_encrypt\n",
495 dev->name, meta->magic,
496 HOSTAP_SKB_TX_DATA_MAGIC);
497 ret = 0;
498 iface->stats.tx_dropped++;
499 goto fail;
500 }
501 }
502
503 if (local->func->tx == NULL || local->func->tx(skb, dev)) {
504 ret = 0;
505 iface->stats.tx_dropped++;
506 } else {
507 ret = 0;
508 iface->stats.tx_packets++;
509 iface->stats.tx_bytes += skb->len;
510 }
511
512 fail:
513 if (!ret && skb)
514 dev_kfree_skb(skb);
515 tx_exit:
516 if (tx.sta_ptr)
517 hostap_handle_sta_release(tx.sta_ptr);
518 return ret;
519}
520
521
522EXPORT_SYMBOL(hostap_dump_tx_80211);
523EXPORT_SYMBOL(hostap_tx_encrypt);
524EXPORT_SYMBOL(hostap_master_start_xmit);