Commit | Line | Data |
---|---|---|
5fad5a2e AB |
1 | #include "hostap_80211.h" |
2 | #include "hostap_common.h" | |
3 | #include "hostap_wlan.h" | |
4 | #include "hostap.h" | |
5 | #include "hostap_ap.h" | |
6 | ||
7 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
8 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
9 | static unsigned char rfc1042_header[] = | |
10 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
11 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
12 | static unsigned char bridge_tunnel_header[] = | |
13 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
14 | /* No encapsulation header if EtherType < 0x600 (=length) */ | |
15 | ||
ff1d2767 JM |
16 | void hostap_dump_tx_80211(const char *name, struct sk_buff *skb) |
17 | { | |
d041674d | 18 | struct ieee80211_hdr_4addr *hdr; |
ff1d2767 JM |
19 | u16 fc; |
20 | ||
d041674d | 21 | hdr = (struct ieee80211_hdr_4addr *) skb->data; |
ff1d2767 JM |
22 | |
23 | printk(KERN_DEBUG "%s: TX len=%d jiffies=%ld\n", | |
24 | name, skb->len, jiffies); | |
25 | ||
26 | if (skb->len < 2) | |
27 | return; | |
28 | ||
c0f72ca8 | 29 | fc = le16_to_cpu(hdr->frame_ctl); |
ff1d2767 | 30 | printk(KERN_DEBUG " FC=0x%04x (type=%d:%d)%s%s", |
4339d328 | 31 | fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4, |
b2f4a2e3 JM |
32 | fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "", |
33 | fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : ""); | |
ff1d2767 JM |
34 | |
35 | if (skb->len < IEEE80211_DATA_HDR3_LEN) { | |
36 | printk("\n"); | |
37 | return; | |
38 | } | |
39 | ||
40 | printk(" dur=0x%04x seq=0x%04x\n", le16_to_cpu(hdr->duration_id), | |
c0f72ca8 | 41 | le16_to_cpu(hdr->seq_ctl)); |
ff1d2767 JM |
42 | |
43 | printk(KERN_DEBUG " A1=" MACSTR " A2=" MACSTR " A3=" MACSTR, | |
44 | MAC2STR(hdr->addr1), MAC2STR(hdr->addr2), MAC2STR(hdr->addr3)); | |
45 | if (skb->len >= 30) | |
46 | printk(" A4=" MACSTR, MAC2STR(hdr->addr4)); | |
47 | printk("\n"); | |
48 | } | |
49 | ||
50 | ||
51 | /* hard_start_xmit function for data interfaces (wlan#, wlan#wds#, wlan#sta) | |
52 | * Convert Ethernet header into a suitable IEEE 802.11 header depending on | |
53 | * device configuration. */ | |
54 | int hostap_data_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
55 | { | |
56 | struct hostap_interface *iface; | |
57 | local_info_t *local; | |
58 | int need_headroom, need_tailroom = 0; | |
d041674d | 59 | struct ieee80211_hdr_4addr hdr; |
ff1d2767 JM |
60 | u16 fc, ethertype = 0; |
61 | enum { | |
62 | WDS_NO = 0, WDS_OWN_FRAME, WDS_COMPLIANT_FRAME | |
63 | } use_wds = WDS_NO; | |
64 | u8 *encaps_data; | |
65 | int hdr_len, encaps_len, skip_header_bytes; | |
66 | int to_assoc_ap = 0; | |
67 | struct hostap_skb_tx_data *meta; | |
68 | ||
69 | iface = netdev_priv(dev); | |
70 | local = iface->local; | |
71 | ||
72 | if (skb->len < ETH_HLEN) { | |
73 | printk(KERN_DEBUG "%s: hostap_data_start_xmit: short skb " | |
74 | "(len=%d)\n", dev->name, skb->len); | |
75 | kfree_skb(skb); | |
76 | return 0; | |
77 | } | |
78 | ||
79 | if (local->ddev != dev) { | |
80 | use_wds = (local->iw_mode == IW_MODE_MASTER && | |
81 | !(local->wds_type & HOSTAP_WDS_STANDARD_FRAME)) ? | |
82 | WDS_OWN_FRAME : WDS_COMPLIANT_FRAME; | |
83 | if (dev == local->stadev) { | |
84 | to_assoc_ap = 1; | |
85 | use_wds = WDS_NO; | |
86 | } else if (dev == local->apdev) { | |
87 | printk(KERN_DEBUG "%s: prism2_tx: trying to use " | |
88 | "AP device with Ethernet net dev\n", dev->name); | |
89 | kfree_skb(skb); | |
90 | return 0; | |
91 | } | |
92 | } else { | |
93 | if (local->iw_mode == IW_MODE_REPEAT) { | |
94 | printk(KERN_DEBUG "%s: prism2_tx: trying to use " | |
95 | "non-WDS link in Repeater mode\n", dev->name); | |
96 | kfree_skb(skb); | |
97 | return 0; | |
98 | } else if (local->iw_mode == IW_MODE_INFRA && | |
99 | (local->wds_type & HOSTAP_WDS_AP_CLIENT) && | |
100 | memcmp(skb->data + ETH_ALEN, dev->dev_addr, | |
101 | ETH_ALEN) != 0) { | |
102 | /* AP client mode: send frames with foreign src addr | |
103 | * using 4-addr WDS frames */ | |
104 | use_wds = WDS_COMPLIANT_FRAME; | |
105 | } | |
106 | } | |
107 | ||
108 | /* Incoming skb->data: dst_addr[6], src_addr[6], proto[2], payload | |
109 | * ==> | |
110 | * Prism2 TX frame with 802.11 header: | |
111 | * txdesc (address order depending on used mode; includes dst_addr and | |
112 | * src_addr), possible encapsulation (RFC1042/Bridge-Tunnel; | |
113 | * proto[2], payload {, possible addr4[6]} */ | |
114 | ||
115 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
116 | ||
117 | memset(&hdr, 0, sizeof(hdr)); | |
118 | ||
119 | /* Length of data after IEEE 802.11 header */ | |
120 | encaps_data = NULL; | |
121 | encaps_len = 0; | |
122 | skip_header_bytes = ETH_HLEN; | |
123 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
124 | encaps_data = bridge_tunnel_header; | |
125 | encaps_len = sizeof(bridge_tunnel_header); | |
126 | skip_header_bytes -= 2; | |
127 | } else if (ethertype >= 0x600) { | |
128 | encaps_data = rfc1042_header; | |
129 | encaps_len = sizeof(rfc1042_header); | |
130 | skip_header_bytes -= 2; | |
131 | } | |
132 | ||
4339d328 | 133 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; |
ff1d2767 JM |
134 | hdr_len = IEEE80211_DATA_HDR3_LEN; |
135 | ||
136 | if (use_wds != WDS_NO) { | |
137 | /* Note! Prism2 station firmware has problems with sending real | |
138 | * 802.11 frames with four addresses; until these problems can | |
139 | * be fixed or worked around, 4-addr frames needed for WDS are | |
140 | * using incompatible format: FromDS flag is not set and the | |
141 | * fourth address is added after the frame payload; it is | |
142 | * assumed, that the receiving station knows how to handle this | |
143 | * frame format */ | |
144 | ||
145 | if (use_wds == WDS_COMPLIANT_FRAME) { | |
b2f4a2e3 | 146 | fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS; |
ff1d2767 JM |
147 | /* From&To DS: Addr1 = RA, Addr2 = TA, Addr3 = DA, |
148 | * Addr4 = SA */ | |
d626f62b ACM |
149 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, |
150 | &hdr.addr4, ETH_ALEN); | |
ff1d2767 JM |
151 | hdr_len += ETH_ALEN; |
152 | } else { | |
153 | /* bogus 4-addr format to workaround Prism2 station | |
154 | * f/w bug */ | |
b2f4a2e3 | 155 | fc |= IEEE80211_FCTL_TODS; |
ff1d2767 JM |
156 | /* From DS: Addr1 = DA (used as RA), |
157 | * Addr2 = BSSID (used as TA), Addr3 = SA (used as DA), | |
158 | */ | |
159 | ||
160 | /* SA from skb->data + ETH_ALEN will be added after | |
161 | * frame payload; use hdr.addr4 as a temporary buffer | |
162 | */ | |
d626f62b ACM |
163 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, |
164 | &hdr.addr4, ETH_ALEN); | |
ff1d2767 JM |
165 | need_tailroom += ETH_ALEN; |
166 | } | |
167 | ||
168 | /* send broadcast and multicast frames to broadcast RA, if | |
169 | * configured; otherwise, use unicast RA of the WDS link */ | |
170 | if ((local->wds_type & HOSTAP_WDS_BROADCAST_RA) && | |
171 | skb->data[0] & 0x01) | |
172 | memset(&hdr.addr1, 0xff, ETH_ALEN); | |
173 | else if (iface->type == HOSTAP_INTERFACE_WDS) | |
174 | memcpy(&hdr.addr1, iface->u.wds.remote_addr, | |
175 | ETH_ALEN); | |
176 | else | |
177 | memcpy(&hdr.addr1, local->bssid, ETH_ALEN); | |
178 | memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN); | |
d626f62b | 179 | skb_copy_from_linear_data(skb, &hdr.addr3, ETH_ALEN); |
ff1d2767 | 180 | } else if (local->iw_mode == IW_MODE_MASTER && !to_assoc_ap) { |
b2f4a2e3 | 181 | fc |= IEEE80211_FCTL_FROMDS; |
ff1d2767 | 182 | /* From DS: Addr1 = DA, Addr2 = BSSID, Addr3 = SA */ |
d626f62b | 183 | skb_copy_from_linear_data(skb, &hdr.addr1, ETH_ALEN); |
ff1d2767 | 184 | memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN); |
d626f62b ACM |
185 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr3, |
186 | ETH_ALEN); | |
ff1d2767 | 187 | } else if (local->iw_mode == IW_MODE_INFRA || to_assoc_ap) { |
b2f4a2e3 | 188 | fc |= IEEE80211_FCTL_TODS; |
ff1d2767 JM |
189 | /* To DS: Addr1 = BSSID, Addr2 = SA, Addr3 = DA */ |
190 | memcpy(&hdr.addr1, to_assoc_ap ? | |
191 | local->assoc_ap_addr : local->bssid, ETH_ALEN); | |
d626f62b ACM |
192 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr2, |
193 | ETH_ALEN); | |
194 | skb_copy_from_linear_data(skb, &hdr.addr3, ETH_ALEN); | |
ff1d2767 JM |
195 | } else if (local->iw_mode == IW_MODE_ADHOC) { |
196 | /* not From/To DS: Addr1 = DA, Addr2 = SA, Addr3 = BSSID */ | |
d626f62b ACM |
197 | skb_copy_from_linear_data(skb, &hdr.addr1, ETH_ALEN); |
198 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr2, | |
199 | ETH_ALEN); | |
ff1d2767 JM |
200 | memcpy(&hdr.addr3, local->bssid, ETH_ALEN); |
201 | } | |
202 | ||
c0f72ca8 | 203 | hdr.frame_ctl = cpu_to_le16(fc); |
ff1d2767 JM |
204 | |
205 | skb_pull(skb, skip_header_bytes); | |
206 | need_headroom = local->func->need_tx_headroom + hdr_len + encaps_len; | |
207 | if (skb_tailroom(skb) < need_tailroom) { | |
208 | skb = skb_unshare(skb, GFP_ATOMIC); | |
209 | if (skb == NULL) { | |
210 | iface->stats.tx_dropped++; | |
211 | return 0; | |
212 | } | |
213 | if (pskb_expand_head(skb, need_headroom, need_tailroom, | |
214 | GFP_ATOMIC)) { | |
215 | kfree_skb(skb); | |
216 | iface->stats.tx_dropped++; | |
217 | return 0; | |
218 | } | |
219 | } else if (skb_headroom(skb) < need_headroom) { | |
220 | struct sk_buff *tmp = skb; | |
221 | skb = skb_realloc_headroom(skb, need_headroom); | |
222 | kfree_skb(tmp); | |
223 | if (skb == NULL) { | |
224 | iface->stats.tx_dropped++; | |
225 | return 0; | |
226 | } | |
227 | } else { | |
228 | skb = skb_unshare(skb, GFP_ATOMIC); | |
229 | if (skb == NULL) { | |
230 | iface->stats.tx_dropped++; | |
231 | return 0; | |
232 | } | |
233 | } | |
234 | ||
235 | if (encaps_data) | |
236 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
237 | memcpy(skb_push(skb, hdr_len), &hdr, hdr_len); | |
238 | if (use_wds == WDS_OWN_FRAME) { | |
239 | memcpy(skb_put(skb, ETH_ALEN), &hdr.addr4, ETH_ALEN); | |
240 | } | |
241 | ||
242 | iface->stats.tx_packets++; | |
243 | iface->stats.tx_bytes += skb->len; | |
244 | ||
459a98ed | 245 | skb_reset_mac_header(skb); |
ff1d2767 JM |
246 | meta = (struct hostap_skb_tx_data *) skb->cb; |
247 | memset(meta, 0, sizeof(*meta)); | |
248 | meta->magic = HOSTAP_SKB_TX_DATA_MAGIC; | |
5bee720f JM |
249 | if (use_wds) |
250 | meta->flags |= HOSTAP_TX_FLAGS_WDS; | |
ff1d2767 JM |
251 | meta->ethertype = ethertype; |
252 | meta->iface = iface; | |
253 | ||
254 | /* Send IEEE 802.11 encapsulated frame using the master radio device */ | |
255 | skb->dev = local->dev; | |
256 | dev_queue_xmit(skb); | |
257 | return 0; | |
258 | } | |
259 | ||
260 | ||
261 | /* hard_start_xmit function for hostapd wlan#ap interfaces */ | |
262 | int hostap_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
263 | { | |
264 | struct hostap_interface *iface; | |
265 | local_info_t *local; | |
266 | struct hostap_skb_tx_data *meta; | |
d041674d | 267 | struct ieee80211_hdr_4addr *hdr; |
ff1d2767 JM |
268 | u16 fc; |
269 | ||
270 | iface = netdev_priv(dev); | |
271 | local = iface->local; | |
272 | ||
273 | if (skb->len < 10) { | |
274 | printk(KERN_DEBUG "%s: hostap_mgmt_start_xmit: short skb " | |
275 | "(len=%d)\n", dev->name, skb->len); | |
276 | kfree_skb(skb); | |
277 | return 0; | |
278 | } | |
279 | ||
280 | iface->stats.tx_packets++; | |
281 | iface->stats.tx_bytes += skb->len; | |
282 | ||
283 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
284 | memset(meta, 0, sizeof(*meta)); | |
285 | meta->magic = HOSTAP_SKB_TX_DATA_MAGIC; | |
286 | meta->iface = iface; | |
287 | ||
288 | if (skb->len >= IEEE80211_DATA_HDR3_LEN + sizeof(rfc1042_header) + 2) { | |
d041674d | 289 | hdr = (struct ieee80211_hdr_4addr *) skb->data; |
c0f72ca8 | 290 | fc = le16_to_cpu(hdr->frame_ctl); |
4339d328 JM |
291 | if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA && |
292 | WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_DATA) { | |
ff1d2767 JM |
293 | u8 *pos = &skb->data[IEEE80211_DATA_HDR3_LEN + |
294 | sizeof(rfc1042_header)]; | |
295 | meta->ethertype = (pos[0] << 8) | pos[1]; | |
296 | } | |
297 | } | |
298 | ||
299 | /* Send IEEE 802.11 encapsulated frame using the master radio device */ | |
300 | skb->dev = local->dev; | |
301 | dev_queue_xmit(skb); | |
302 | return 0; | |
303 | } | |
304 | ||
305 | ||
306 | /* Called only from software IRQ */ | |
79058aca JM |
307 | static struct sk_buff * hostap_tx_encrypt(struct sk_buff *skb, |
308 | struct ieee80211_crypt_data *crypt) | |
ff1d2767 JM |
309 | { |
310 | struct hostap_interface *iface; | |
311 | local_info_t *local; | |
d041674d | 312 | struct ieee80211_hdr_4addr *hdr; |
ff1d2767 JM |
313 | u16 fc; |
314 | int hdr_len, res; | |
315 | ||
316 | iface = netdev_priv(skb->dev); | |
317 | local = iface->local; | |
318 | ||
319 | if (skb->len < IEEE80211_DATA_HDR3_LEN) { | |
320 | kfree_skb(skb); | |
321 | return NULL; | |
322 | } | |
323 | ||
324 | if (local->tkip_countermeasures && | |
79058aca | 325 | strcmp(crypt->ops->name, "TKIP") == 0) { |
d041674d | 326 | hdr = (struct ieee80211_hdr_4addr *) skb->data; |
ff1d2767 JM |
327 | if (net_ratelimit()) { |
328 | printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " | |
329 | "TX packet to " MACSTR "\n", | |
330 | local->dev->name, MAC2STR(hdr->addr1)); | |
331 | } | |
332 | kfree_skb(skb); | |
333 | return NULL; | |
334 | } | |
335 | ||
336 | skb = skb_unshare(skb, GFP_ATOMIC); | |
337 | if (skb == NULL) | |
338 | return NULL; | |
339 | ||
5bfc819b JK |
340 | if ((skb_headroom(skb) < crypt->ops->extra_mpdu_prefix_len || |
341 | skb_tailroom(skb) < crypt->ops->extra_mpdu_postfix_len) && | |
342 | pskb_expand_head(skb, crypt->ops->extra_mpdu_prefix_len, | |
343 | crypt->ops->extra_mpdu_postfix_len, GFP_ATOMIC)) { | |
ff1d2767 JM |
344 | kfree_skb(skb); |
345 | return NULL; | |
346 | } | |
347 | ||
d041674d | 348 | hdr = (struct ieee80211_hdr_4addr *) skb->data; |
c0f72ca8 | 349 | fc = le16_to_cpu(hdr->frame_ctl); |
ff1d2767 JM |
350 | hdr_len = hostap_80211_get_hdrlen(fc); |
351 | ||
352 | /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so | |
353 | * call both MSDU and MPDU encryption functions from here. */ | |
354 | atomic_inc(&crypt->refcnt); | |
355 | res = 0; | |
356 | if (crypt->ops->encrypt_msdu) | |
357 | res = crypt->ops->encrypt_msdu(skb, hdr_len, crypt->priv); | |
358 | if (res == 0 && crypt->ops->encrypt_mpdu) | |
359 | res = crypt->ops->encrypt_mpdu(skb, hdr_len, crypt->priv); | |
360 | atomic_dec(&crypt->refcnt); | |
361 | if (res < 0) { | |
362 | kfree_skb(skb); | |
363 | return NULL; | |
364 | } | |
365 | ||
366 | return skb; | |
367 | } | |
368 | ||
369 | ||
370 | /* hard_start_xmit function for master radio interface wifi#. | |
371 | * AP processing (TX rate control, power save buffering, etc.). | |
372 | * Use hardware TX function to send the frame. */ | |
373 | int hostap_master_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
374 | { | |
375 | struct hostap_interface *iface; | |
376 | local_info_t *local; | |
377 | int ret = 1; | |
378 | u16 fc; | |
379 | struct hostap_tx_data tx; | |
380 | ap_tx_ret tx_ret; | |
381 | struct hostap_skb_tx_data *meta; | |
382 | int no_encrypt = 0; | |
d041674d | 383 | struct ieee80211_hdr_4addr *hdr; |
ff1d2767 JM |
384 | |
385 | iface = netdev_priv(dev); | |
386 | local = iface->local; | |
387 | ||
388 | tx.skb = skb; | |
389 | tx.sta_ptr = NULL; | |
390 | ||
391 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
392 | if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) { | |
393 | printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, " | |
394 | "expected 0x%08x)\n", | |
395 | dev->name, meta->magic, HOSTAP_SKB_TX_DATA_MAGIC); | |
396 | ret = 0; | |
397 | iface->stats.tx_dropped++; | |
398 | goto fail; | |
399 | } | |
400 | ||
401 | if (local->host_encrypt) { | |
402 | /* Set crypt to default algorithm and key; will be replaced in | |
403 | * AP code if STA has own alg/key */ | |
404 | tx.crypt = local->crypt[local->tx_keyidx]; | |
405 | tx.host_encrypt = 1; | |
406 | } else { | |
407 | tx.crypt = NULL; | |
408 | tx.host_encrypt = 0; | |
409 | } | |
410 | ||
411 | if (skb->len < 24) { | |
412 | printk(KERN_DEBUG "%s: hostap_master_start_xmit: short skb " | |
413 | "(len=%d)\n", dev->name, skb->len); | |
414 | ret = 0; | |
415 | iface->stats.tx_dropped++; | |
416 | goto fail; | |
417 | } | |
418 | ||
419 | /* FIX (?): | |
420 | * Wi-Fi 802.11b test plan suggests that AP should ignore power save | |
421 | * bit in authentication and (re)association frames and assume tha | |
422 | * STA remains awake for the response. */ | |
423 | tx_ret = hostap_handle_sta_tx(local, &tx); | |
424 | skb = tx.skb; | |
425 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
d041674d | 426 | hdr = (struct ieee80211_hdr_4addr *) skb->data; |
c0f72ca8 | 427 | fc = le16_to_cpu(hdr->frame_ctl); |
ff1d2767 JM |
428 | switch (tx_ret) { |
429 | case AP_TX_CONTINUE: | |
430 | break; | |
431 | case AP_TX_CONTINUE_NOT_AUTHORIZED: | |
432 | if (local->ieee_802_1x && | |
4339d328 | 433 | WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA && |
5bee720f JM |
434 | meta->ethertype != ETH_P_PAE && |
435 | !(meta->flags & HOSTAP_TX_FLAGS_WDS)) { | |
ff1d2767 JM |
436 | printk(KERN_DEBUG "%s: dropped frame to unauthorized " |
437 | "port (IEEE 802.1X): ethertype=0x%04x\n", | |
438 | dev->name, meta->ethertype); | |
439 | hostap_dump_tx_80211(dev->name, skb); | |
440 | ||
441 | ret = 0; /* drop packet */ | |
442 | iface->stats.tx_dropped++; | |
443 | goto fail; | |
444 | } | |
445 | break; | |
446 | case AP_TX_DROP: | |
447 | ret = 0; /* drop packet */ | |
448 | iface->stats.tx_dropped++; | |
449 | goto fail; | |
450 | case AP_TX_RETRY: | |
451 | goto fail; | |
452 | case AP_TX_BUFFERED: | |
453 | /* do not free skb here, it will be freed when the | |
454 | * buffered frame is sent/timed out */ | |
455 | ret = 0; | |
456 | goto tx_exit; | |
457 | } | |
458 | ||
459 | /* Request TX callback if protocol version is 2 in 802.11 header; | |
460 | * this version 2 is a special case used between hostapd and kernel | |
461 | * driver */ | |
b2f4a2e3 | 462 | if (((fc & IEEE80211_FCTL_VERS) == BIT(1)) && |
ff1d2767 JM |
463 | local->ap && local->ap->tx_callback_idx && meta->tx_cb_idx == 0) { |
464 | meta->tx_cb_idx = local->ap->tx_callback_idx; | |
465 | ||
466 | /* remove special version from the frame header */ | |
b2f4a2e3 | 467 | fc &= ~IEEE80211_FCTL_VERS; |
c0f72ca8 | 468 | hdr->frame_ctl = cpu_to_le16(fc); |
ff1d2767 JM |
469 | } |
470 | ||
4339d328 | 471 | if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_DATA) { |
ff1d2767 JM |
472 | no_encrypt = 1; |
473 | tx.crypt = NULL; | |
474 | } | |
475 | ||
476 | if (local->ieee_802_1x && meta->ethertype == ETH_P_PAE && tx.crypt && | |
cfa146e4 | 477 | !(fc & IEEE80211_FCTL_PROTECTED)) { |
ff1d2767 JM |
478 | no_encrypt = 1; |
479 | PDEBUG(DEBUG_EXTRA2, "%s: TX: IEEE 802.1X - passing " | |
480 | "unencrypted EAPOL frame\n", dev->name); | |
481 | tx.crypt = NULL; /* no encryption for IEEE 802.1X frames */ | |
482 | } | |
483 | ||
484 | if (tx.crypt && (!tx.crypt->ops || !tx.crypt->ops->encrypt_mpdu)) | |
485 | tx.crypt = NULL; | |
486 | else if ((tx.crypt || local->crypt[local->tx_keyidx]) && !no_encrypt) { | |
487 | /* Add ISWEP flag both for firmware and host based encryption | |
488 | */ | |
831a179f | 489 | fc |= IEEE80211_FCTL_PROTECTED; |
c0f72ca8 | 490 | hdr->frame_ctl = cpu_to_le16(fc); |
ff1d2767 | 491 | } else if (local->drop_unencrypted && |
4339d328 | 492 | WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA && |
ff1d2767 JM |
493 | meta->ethertype != ETH_P_PAE) { |
494 | if (net_ratelimit()) { | |
495 | printk(KERN_DEBUG "%s: dropped unencrypted TX data " | |
496 | "frame (drop_unencrypted=1)\n", dev->name); | |
497 | } | |
498 | iface->stats.tx_dropped++; | |
499 | ret = 0; | |
500 | goto fail; | |
501 | } | |
502 | ||
503 | if (tx.crypt) { | |
504 | skb = hostap_tx_encrypt(skb, tx.crypt); | |
505 | if (skb == NULL) { | |
506 | printk(KERN_DEBUG "%s: TX - encryption failed\n", | |
507 | dev->name); | |
508 | ret = 0; | |
509 | goto fail; | |
510 | } | |
511 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
512 | if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) { | |
513 | printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, " | |
514 | "expected 0x%08x) after hostap_tx_encrypt\n", | |
515 | dev->name, meta->magic, | |
516 | HOSTAP_SKB_TX_DATA_MAGIC); | |
517 | ret = 0; | |
518 | iface->stats.tx_dropped++; | |
519 | goto fail; | |
520 | } | |
521 | } | |
522 | ||
523 | if (local->func->tx == NULL || local->func->tx(skb, dev)) { | |
524 | ret = 0; | |
525 | iface->stats.tx_dropped++; | |
526 | } else { | |
527 | ret = 0; | |
528 | iface->stats.tx_packets++; | |
529 | iface->stats.tx_bytes += skb->len; | |
530 | } | |
531 | ||
532 | fail: | |
533 | if (!ret && skb) | |
534 | dev_kfree_skb(skb); | |
535 | tx_exit: | |
536 | if (tx.sta_ptr) | |
537 | hostap_handle_sta_release(tx.sta_ptr); | |
538 | return ret; | |
539 | } | |
540 | ||
541 | ||
ff1d2767 | 542 | EXPORT_SYMBOL(hostap_master_start_xmit); |