Commit | Line | Data |
---|---|---|
5a0e3ad6 | 1 | #include <linux/slab.h> |
ee40fa06 | 2 | #include <linux/export.h> |
5a0e3ad6 | 3 | |
5fad5a2e AB |
4 | #include "hostap_80211.h" |
5 | #include "hostap_common.h" | |
6 | #include "hostap_wlan.h" | |
7 | #include "hostap.h" | |
8 | #include "hostap_ap.h" | |
9 | ||
10 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
11 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
12 | static unsigned char rfc1042_header[] = | |
13 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
14 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
15 | static unsigned char bridge_tunnel_header[] = | |
16 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
17 | /* No encapsulation header if EtherType < 0x600 (=length) */ | |
18 | ||
ff1d2767 JM |
19 | void hostap_dump_tx_80211(const char *name, struct sk_buff *skb) |
20 | { | |
1ea893fd | 21 | struct ieee80211_hdr *hdr; |
ff1d2767 JM |
22 | u16 fc; |
23 | ||
1ea893fd | 24 | hdr = (struct ieee80211_hdr *) skb->data; |
ff1d2767 JM |
25 | |
26 | printk(KERN_DEBUG "%s: TX len=%d jiffies=%ld\n", | |
27 | name, skb->len, jiffies); | |
28 | ||
29 | if (skb->len < 2) | |
30 | return; | |
31 | ||
1ea893fd | 32 | fc = le16_to_cpu(hdr->frame_control); |
ff1d2767 | 33 | printk(KERN_DEBUG " FC=0x%04x (type=%d:%d)%s%s", |
1ea893fd DW |
34 | fc, (fc & IEEE80211_FCTL_FTYPE) >> 2, |
35 | (fc & IEEE80211_FCTL_STYPE) >> 4, | |
b2f4a2e3 JM |
36 | fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "", |
37 | fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : ""); | |
ff1d2767 JM |
38 | |
39 | if (skb->len < IEEE80211_DATA_HDR3_LEN) { | |
40 | printk("\n"); | |
41 | return; | |
42 | } | |
43 | ||
44 | printk(" dur=0x%04x seq=0x%04x\n", le16_to_cpu(hdr->duration_id), | |
1ea893fd | 45 | le16_to_cpu(hdr->seq_ctrl)); |
ff1d2767 | 46 | |
e174961c JB |
47 | printk(KERN_DEBUG " A1=%pM", hdr->addr1); |
48 | printk(" A2=%pM", hdr->addr2); | |
49 | printk(" A3=%pM", hdr->addr3); | |
ff1d2767 | 50 | if (skb->len >= 30) |
e174961c | 51 | printk(" A4=%pM", hdr->addr4); |
ff1d2767 JM |
52 | printk("\n"); |
53 | } | |
54 | ||
55 | ||
56 | /* hard_start_xmit function for data interfaces (wlan#, wlan#wds#, wlan#sta) | |
57 | * Convert Ethernet header into a suitable IEEE 802.11 header depending on | |
58 | * device configuration. */ | |
d0cf9c0d SH |
59 | netdev_tx_t hostap_data_start_xmit(struct sk_buff *skb, |
60 | struct net_device *dev) | |
ff1d2767 JM |
61 | { |
62 | struct hostap_interface *iface; | |
63 | local_info_t *local; | |
64 | int need_headroom, need_tailroom = 0; | |
1ea893fd | 65 | struct ieee80211_hdr hdr; |
ff1d2767 JM |
66 | u16 fc, ethertype = 0; |
67 | enum { | |
68 | WDS_NO = 0, WDS_OWN_FRAME, WDS_COMPLIANT_FRAME | |
69 | } use_wds = WDS_NO; | |
70 | u8 *encaps_data; | |
71 | int hdr_len, encaps_len, skip_header_bytes; | |
72 | int to_assoc_ap = 0; | |
73 | struct hostap_skb_tx_data *meta; | |
74 | ||
75 | iface = netdev_priv(dev); | |
76 | local = iface->local; | |
77 | ||
78 | if (skb->len < ETH_HLEN) { | |
79 | printk(KERN_DEBUG "%s: hostap_data_start_xmit: short skb " | |
80 | "(len=%d)\n", dev->name, skb->len); | |
81 | kfree_skb(skb); | |
ec634fe3 | 82 | return NETDEV_TX_OK; |
ff1d2767 JM |
83 | } |
84 | ||
85 | if (local->ddev != dev) { | |
86 | use_wds = (local->iw_mode == IW_MODE_MASTER && | |
87 | !(local->wds_type & HOSTAP_WDS_STANDARD_FRAME)) ? | |
88 | WDS_OWN_FRAME : WDS_COMPLIANT_FRAME; | |
89 | if (dev == local->stadev) { | |
90 | to_assoc_ap = 1; | |
91 | use_wds = WDS_NO; | |
92 | } else if (dev == local->apdev) { | |
93 | printk(KERN_DEBUG "%s: prism2_tx: trying to use " | |
94 | "AP device with Ethernet net dev\n", dev->name); | |
95 | kfree_skb(skb); | |
ec634fe3 | 96 | return NETDEV_TX_OK; |
ff1d2767 JM |
97 | } |
98 | } else { | |
99 | if (local->iw_mode == IW_MODE_REPEAT) { | |
100 | printk(KERN_DEBUG "%s: prism2_tx: trying to use " | |
101 | "non-WDS link in Repeater mode\n", dev->name); | |
102 | kfree_skb(skb); | |
ec634fe3 | 103 | return NETDEV_TX_OK; |
ff1d2767 JM |
104 | } else if (local->iw_mode == IW_MODE_INFRA && |
105 | (local->wds_type & HOSTAP_WDS_AP_CLIENT) && | |
106 | memcmp(skb->data + ETH_ALEN, dev->dev_addr, | |
107 | ETH_ALEN) != 0) { | |
108 | /* AP client mode: send frames with foreign src addr | |
109 | * using 4-addr WDS frames */ | |
110 | use_wds = WDS_COMPLIANT_FRAME; | |
111 | } | |
112 | } | |
113 | ||
114 | /* Incoming skb->data: dst_addr[6], src_addr[6], proto[2], payload | |
115 | * ==> | |
116 | * Prism2 TX frame with 802.11 header: | |
117 | * txdesc (address order depending on used mode; includes dst_addr and | |
118 | * src_addr), possible encapsulation (RFC1042/Bridge-Tunnel; | |
119 | * proto[2], payload {, possible addr4[6]} */ | |
120 | ||
121 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
122 | ||
123 | memset(&hdr, 0, sizeof(hdr)); | |
124 | ||
125 | /* Length of data after IEEE 802.11 header */ | |
126 | encaps_data = NULL; | |
127 | encaps_len = 0; | |
128 | skip_header_bytes = ETH_HLEN; | |
129 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
130 | encaps_data = bridge_tunnel_header; | |
131 | encaps_len = sizeof(bridge_tunnel_header); | |
132 | skip_header_bytes -= 2; | |
133 | } else if (ethertype >= 0x600) { | |
134 | encaps_data = rfc1042_header; | |
135 | encaps_len = sizeof(rfc1042_header); | |
136 | skip_header_bytes -= 2; | |
137 | } | |
138 | ||
4339d328 | 139 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; |
ff1d2767 JM |
140 | hdr_len = IEEE80211_DATA_HDR3_LEN; |
141 | ||
142 | if (use_wds != WDS_NO) { | |
143 | /* Note! Prism2 station firmware has problems with sending real | |
144 | * 802.11 frames with four addresses; until these problems can | |
145 | * be fixed or worked around, 4-addr frames needed for WDS are | |
146 | * using incompatible format: FromDS flag is not set and the | |
147 | * fourth address is added after the frame payload; it is | |
148 | * assumed, that the receiving station knows how to handle this | |
149 | * frame format */ | |
150 | ||
151 | if (use_wds == WDS_COMPLIANT_FRAME) { | |
b2f4a2e3 | 152 | fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS; |
ff1d2767 JM |
153 | /* From&To DS: Addr1 = RA, Addr2 = TA, Addr3 = DA, |
154 | * Addr4 = SA */ | |
d626f62b ACM |
155 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, |
156 | &hdr.addr4, ETH_ALEN); | |
ff1d2767 JM |
157 | hdr_len += ETH_ALEN; |
158 | } else { | |
159 | /* bogus 4-addr format to workaround Prism2 station | |
160 | * f/w bug */ | |
b2f4a2e3 | 161 | fc |= IEEE80211_FCTL_TODS; |
ff1d2767 JM |
162 | /* From DS: Addr1 = DA (used as RA), |
163 | * Addr2 = BSSID (used as TA), Addr3 = SA (used as DA), | |
164 | */ | |
165 | ||
166 | /* SA from skb->data + ETH_ALEN will be added after | |
167 | * frame payload; use hdr.addr4 as a temporary buffer | |
168 | */ | |
d626f62b ACM |
169 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, |
170 | &hdr.addr4, ETH_ALEN); | |
ff1d2767 JM |
171 | need_tailroom += ETH_ALEN; |
172 | } | |
173 | ||
174 | /* send broadcast and multicast frames to broadcast RA, if | |
175 | * configured; otherwise, use unicast RA of the WDS link */ | |
176 | if ((local->wds_type & HOSTAP_WDS_BROADCAST_RA) && | |
177 | skb->data[0] & 0x01) | |
178 | memset(&hdr.addr1, 0xff, ETH_ALEN); | |
179 | else if (iface->type == HOSTAP_INTERFACE_WDS) | |
180 | memcpy(&hdr.addr1, iface->u.wds.remote_addr, | |
181 | ETH_ALEN); | |
182 | else | |
183 | memcpy(&hdr.addr1, local->bssid, ETH_ALEN); | |
184 | memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN); | |
d626f62b | 185 | skb_copy_from_linear_data(skb, &hdr.addr3, ETH_ALEN); |
ff1d2767 | 186 | } else if (local->iw_mode == IW_MODE_MASTER && !to_assoc_ap) { |
b2f4a2e3 | 187 | fc |= IEEE80211_FCTL_FROMDS; |
ff1d2767 | 188 | /* From DS: Addr1 = DA, Addr2 = BSSID, Addr3 = SA */ |
d626f62b | 189 | skb_copy_from_linear_data(skb, &hdr.addr1, ETH_ALEN); |
ff1d2767 | 190 | memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN); |
d626f62b ACM |
191 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr3, |
192 | ETH_ALEN); | |
ff1d2767 | 193 | } else if (local->iw_mode == IW_MODE_INFRA || to_assoc_ap) { |
b2f4a2e3 | 194 | fc |= IEEE80211_FCTL_TODS; |
ff1d2767 JM |
195 | /* To DS: Addr1 = BSSID, Addr2 = SA, Addr3 = DA */ |
196 | memcpy(&hdr.addr1, to_assoc_ap ? | |
197 | local->assoc_ap_addr : local->bssid, ETH_ALEN); | |
d626f62b ACM |
198 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr2, |
199 | ETH_ALEN); | |
200 | skb_copy_from_linear_data(skb, &hdr.addr3, ETH_ALEN); | |
ff1d2767 JM |
201 | } else if (local->iw_mode == IW_MODE_ADHOC) { |
202 | /* not From/To DS: Addr1 = DA, Addr2 = SA, Addr3 = BSSID */ | |
d626f62b ACM |
203 | skb_copy_from_linear_data(skb, &hdr.addr1, ETH_ALEN); |
204 | skb_copy_from_linear_data_offset(skb, ETH_ALEN, &hdr.addr2, | |
205 | ETH_ALEN); | |
ff1d2767 JM |
206 | memcpy(&hdr.addr3, local->bssid, ETH_ALEN); |
207 | } | |
208 | ||
1ea893fd | 209 | hdr.frame_control = cpu_to_le16(fc); |
ff1d2767 JM |
210 | |
211 | skb_pull(skb, skip_header_bytes); | |
212 | need_headroom = local->func->need_tx_headroom + hdr_len + encaps_len; | |
213 | if (skb_tailroom(skb) < need_tailroom) { | |
214 | skb = skb_unshare(skb, GFP_ATOMIC); | |
215 | if (skb == NULL) { | |
216 | iface->stats.tx_dropped++; | |
ec634fe3 | 217 | return NETDEV_TX_OK; |
ff1d2767 JM |
218 | } |
219 | if (pskb_expand_head(skb, need_headroom, need_tailroom, | |
220 | GFP_ATOMIC)) { | |
221 | kfree_skb(skb); | |
222 | iface->stats.tx_dropped++; | |
ec634fe3 | 223 | return NETDEV_TX_OK; |
ff1d2767 JM |
224 | } |
225 | } else if (skb_headroom(skb) < need_headroom) { | |
226 | struct sk_buff *tmp = skb; | |
227 | skb = skb_realloc_headroom(skb, need_headroom); | |
228 | kfree_skb(tmp); | |
229 | if (skb == NULL) { | |
230 | iface->stats.tx_dropped++; | |
ec634fe3 | 231 | return NETDEV_TX_OK; |
ff1d2767 JM |
232 | } |
233 | } else { | |
234 | skb = skb_unshare(skb, GFP_ATOMIC); | |
235 | if (skb == NULL) { | |
236 | iface->stats.tx_dropped++; | |
ec634fe3 | 237 | return NETDEV_TX_OK; |
ff1d2767 JM |
238 | } |
239 | } | |
240 | ||
241 | if (encaps_data) | |
242 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
243 | memcpy(skb_push(skb, hdr_len), &hdr, hdr_len); | |
244 | if (use_wds == WDS_OWN_FRAME) { | |
245 | memcpy(skb_put(skb, ETH_ALEN), &hdr.addr4, ETH_ALEN); | |
246 | } | |
247 | ||
248 | iface->stats.tx_packets++; | |
249 | iface->stats.tx_bytes += skb->len; | |
250 | ||
459a98ed | 251 | skb_reset_mac_header(skb); |
ff1d2767 JM |
252 | meta = (struct hostap_skb_tx_data *) skb->cb; |
253 | memset(meta, 0, sizeof(*meta)); | |
254 | meta->magic = HOSTAP_SKB_TX_DATA_MAGIC; | |
5bee720f JM |
255 | if (use_wds) |
256 | meta->flags |= HOSTAP_TX_FLAGS_WDS; | |
ff1d2767 JM |
257 | meta->ethertype = ethertype; |
258 | meta->iface = iface; | |
259 | ||
260 | /* Send IEEE 802.11 encapsulated frame using the master radio device */ | |
261 | skb->dev = local->dev; | |
262 | dev_queue_xmit(skb); | |
ec634fe3 | 263 | return NETDEV_TX_OK; |
ff1d2767 JM |
264 | } |
265 | ||
266 | ||
267 | /* hard_start_xmit function for hostapd wlan#ap interfaces */ | |
d0cf9c0d SH |
268 | netdev_tx_t hostap_mgmt_start_xmit(struct sk_buff *skb, |
269 | struct net_device *dev) | |
ff1d2767 JM |
270 | { |
271 | struct hostap_interface *iface; | |
272 | local_info_t *local; | |
273 | struct hostap_skb_tx_data *meta; | |
1ea893fd | 274 | struct ieee80211_hdr *hdr; |
ff1d2767 JM |
275 | u16 fc; |
276 | ||
277 | iface = netdev_priv(dev); | |
278 | local = iface->local; | |
279 | ||
280 | if (skb->len < 10) { | |
281 | printk(KERN_DEBUG "%s: hostap_mgmt_start_xmit: short skb " | |
282 | "(len=%d)\n", dev->name, skb->len); | |
283 | kfree_skb(skb); | |
ec634fe3 | 284 | return NETDEV_TX_OK; |
ff1d2767 JM |
285 | } |
286 | ||
287 | iface->stats.tx_packets++; | |
288 | iface->stats.tx_bytes += skb->len; | |
289 | ||
290 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
291 | memset(meta, 0, sizeof(*meta)); | |
292 | meta->magic = HOSTAP_SKB_TX_DATA_MAGIC; | |
293 | meta->iface = iface; | |
294 | ||
295 | if (skb->len >= IEEE80211_DATA_HDR3_LEN + sizeof(rfc1042_header) + 2) { | |
1ea893fd DW |
296 | hdr = (struct ieee80211_hdr *) skb->data; |
297 | fc = le16_to_cpu(hdr->frame_control); | |
298 | if (ieee80211_is_data(hdr->frame_control) && | |
299 | (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DATA) { | |
ff1d2767 JM |
300 | u8 *pos = &skb->data[IEEE80211_DATA_HDR3_LEN + |
301 | sizeof(rfc1042_header)]; | |
302 | meta->ethertype = (pos[0] << 8) | pos[1]; | |
303 | } | |
304 | } | |
305 | ||
306 | /* Send IEEE 802.11 encapsulated frame using the master radio device */ | |
307 | skb->dev = local->dev; | |
308 | dev_queue_xmit(skb); | |
ec634fe3 | 309 | return NETDEV_TX_OK; |
ff1d2767 JM |
310 | } |
311 | ||
312 | ||
313 | /* Called only from software IRQ */ | |
79058aca | 314 | static struct sk_buff * hostap_tx_encrypt(struct sk_buff *skb, |
274bfb8d | 315 | struct lib80211_crypt_data *crypt) |
ff1d2767 JM |
316 | { |
317 | struct hostap_interface *iface; | |
318 | local_info_t *local; | |
1ea893fd | 319 | struct ieee80211_hdr *hdr; |
d7ea3be5 | 320 | int prefix_len, postfix_len, hdr_len, res; |
ff1d2767 JM |
321 | |
322 | iface = netdev_priv(skb->dev); | |
323 | local = iface->local; | |
324 | ||
325 | if (skb->len < IEEE80211_DATA_HDR3_LEN) { | |
326 | kfree_skb(skb); | |
327 | return NULL; | |
328 | } | |
329 | ||
330 | if (local->tkip_countermeasures && | |
79058aca | 331 | strcmp(crypt->ops->name, "TKIP") == 0) { |
1ea893fd | 332 | hdr = (struct ieee80211_hdr *) skb->data; |
ff1d2767 JM |
333 | if (net_ratelimit()) { |
334 | printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " | |
e174961c JB |
335 | "TX packet to %pM\n", |
336 | local->dev->name, hdr->addr1); | |
ff1d2767 JM |
337 | } |
338 | kfree_skb(skb); | |
339 | return NULL; | |
340 | } | |
341 | ||
342 | skb = skb_unshare(skb, GFP_ATOMIC); | |
343 | if (skb == NULL) | |
344 | return NULL; | |
345 | ||
d7ea3be5 BCR |
346 | prefix_len = crypt->ops->extra_mpdu_prefix_len + |
347 | crypt->ops->extra_msdu_prefix_len; | |
348 | postfix_len = crypt->ops->extra_mpdu_postfix_len + | |
349 | crypt->ops->extra_msdu_postfix_len; | |
350 | if ((skb_headroom(skb) < prefix_len || | |
351 | skb_tailroom(skb) < postfix_len) && | |
352 | pskb_expand_head(skb, prefix_len, postfix_len, GFP_ATOMIC)) { | |
ff1d2767 JM |
353 | kfree_skb(skb); |
354 | return NULL; | |
355 | } | |
356 | ||
1ea893fd DW |
357 | hdr = (struct ieee80211_hdr *) skb->data; |
358 | hdr_len = hostap_80211_get_hdrlen(hdr->frame_control); | |
ff1d2767 JM |
359 | |
360 | /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so | |
361 | * call both MSDU and MPDU encryption functions from here. */ | |
362 | atomic_inc(&crypt->refcnt); | |
363 | res = 0; | |
364 | if (crypt->ops->encrypt_msdu) | |
365 | res = crypt->ops->encrypt_msdu(skb, hdr_len, crypt->priv); | |
366 | if (res == 0 && crypt->ops->encrypt_mpdu) | |
367 | res = crypt->ops->encrypt_mpdu(skb, hdr_len, crypt->priv); | |
368 | atomic_dec(&crypt->refcnt); | |
369 | if (res < 0) { | |
370 | kfree_skb(skb); | |
371 | return NULL; | |
372 | } | |
373 | ||
374 | return skb; | |
375 | } | |
376 | ||
377 | ||
378 | /* hard_start_xmit function for master radio interface wifi#. | |
379 | * AP processing (TX rate control, power save buffering, etc.). | |
380 | * Use hardware TX function to send the frame. */ | |
d0cf9c0d SH |
381 | netdev_tx_t hostap_master_start_xmit(struct sk_buff *skb, |
382 | struct net_device *dev) | |
ff1d2767 JM |
383 | { |
384 | struct hostap_interface *iface; | |
385 | local_info_t *local; | |
d0cf9c0d | 386 | netdev_tx_t ret = NETDEV_TX_BUSY; |
ff1d2767 JM |
387 | u16 fc; |
388 | struct hostap_tx_data tx; | |
389 | ap_tx_ret tx_ret; | |
390 | struct hostap_skb_tx_data *meta; | |
391 | int no_encrypt = 0; | |
1ea893fd | 392 | struct ieee80211_hdr *hdr; |
ff1d2767 JM |
393 | |
394 | iface = netdev_priv(dev); | |
395 | local = iface->local; | |
396 | ||
397 | tx.skb = skb; | |
398 | tx.sta_ptr = NULL; | |
399 | ||
400 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
401 | if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) { | |
402 | printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, " | |
403 | "expected 0x%08x)\n", | |
404 | dev->name, meta->magic, HOSTAP_SKB_TX_DATA_MAGIC); | |
ec634fe3 | 405 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
406 | iface->stats.tx_dropped++; |
407 | goto fail; | |
408 | } | |
409 | ||
410 | if (local->host_encrypt) { | |
411 | /* Set crypt to default algorithm and key; will be replaced in | |
412 | * AP code if STA has own alg/key */ | |
274bfb8d | 413 | tx.crypt = local->crypt_info.crypt[local->crypt_info.tx_keyidx]; |
ff1d2767 JM |
414 | tx.host_encrypt = 1; |
415 | } else { | |
416 | tx.crypt = NULL; | |
417 | tx.host_encrypt = 0; | |
418 | } | |
419 | ||
420 | if (skb->len < 24) { | |
421 | printk(KERN_DEBUG "%s: hostap_master_start_xmit: short skb " | |
422 | "(len=%d)\n", dev->name, skb->len); | |
ec634fe3 | 423 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
424 | iface->stats.tx_dropped++; |
425 | goto fail; | |
426 | } | |
427 | ||
428 | /* FIX (?): | |
429 | * Wi-Fi 802.11b test plan suggests that AP should ignore power save | |
430 | * bit in authentication and (re)association frames and assume tha | |
431 | * STA remains awake for the response. */ | |
432 | tx_ret = hostap_handle_sta_tx(local, &tx); | |
433 | skb = tx.skb; | |
434 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
1ea893fd DW |
435 | hdr = (struct ieee80211_hdr *) skb->data; |
436 | fc = le16_to_cpu(hdr->frame_control); | |
ff1d2767 JM |
437 | switch (tx_ret) { |
438 | case AP_TX_CONTINUE: | |
439 | break; | |
440 | case AP_TX_CONTINUE_NOT_AUTHORIZED: | |
441 | if (local->ieee_802_1x && | |
1ea893fd | 442 | ieee80211_is_data(hdr->frame_control) && |
5bee720f JM |
443 | meta->ethertype != ETH_P_PAE && |
444 | !(meta->flags & HOSTAP_TX_FLAGS_WDS)) { | |
ff1d2767 JM |
445 | printk(KERN_DEBUG "%s: dropped frame to unauthorized " |
446 | "port (IEEE 802.1X): ethertype=0x%04x\n", | |
447 | dev->name, meta->ethertype); | |
448 | hostap_dump_tx_80211(dev->name, skb); | |
449 | ||
ec634fe3 | 450 | ret = NETDEV_TX_OK; /* drop packet */ |
ff1d2767 JM |
451 | iface->stats.tx_dropped++; |
452 | goto fail; | |
453 | } | |
454 | break; | |
455 | case AP_TX_DROP: | |
ec634fe3 | 456 | ret = NETDEV_TX_OK; /* drop packet */ |
ff1d2767 JM |
457 | iface->stats.tx_dropped++; |
458 | goto fail; | |
459 | case AP_TX_RETRY: | |
460 | goto fail; | |
461 | case AP_TX_BUFFERED: | |
462 | /* do not free skb here, it will be freed when the | |
463 | * buffered frame is sent/timed out */ | |
ec634fe3 | 464 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
465 | goto tx_exit; |
466 | } | |
467 | ||
468 | /* Request TX callback if protocol version is 2 in 802.11 header; | |
469 | * this version 2 is a special case used between hostapd and kernel | |
470 | * driver */ | |
b2f4a2e3 | 471 | if (((fc & IEEE80211_FCTL_VERS) == BIT(1)) && |
ff1d2767 JM |
472 | local->ap && local->ap->tx_callback_idx && meta->tx_cb_idx == 0) { |
473 | meta->tx_cb_idx = local->ap->tx_callback_idx; | |
474 | ||
475 | /* remove special version from the frame header */ | |
b2f4a2e3 | 476 | fc &= ~IEEE80211_FCTL_VERS; |
1ea893fd | 477 | hdr->frame_control = cpu_to_le16(fc); |
ff1d2767 JM |
478 | } |
479 | ||
1ea893fd | 480 | if (!ieee80211_is_data(hdr->frame_control)) { |
ff1d2767 JM |
481 | no_encrypt = 1; |
482 | tx.crypt = NULL; | |
483 | } | |
484 | ||
485 | if (local->ieee_802_1x && meta->ethertype == ETH_P_PAE && tx.crypt && | |
cfa146e4 | 486 | !(fc & IEEE80211_FCTL_PROTECTED)) { |
ff1d2767 JM |
487 | no_encrypt = 1; |
488 | PDEBUG(DEBUG_EXTRA2, "%s: TX: IEEE 802.1X - passing " | |
489 | "unencrypted EAPOL frame\n", dev->name); | |
490 | tx.crypt = NULL; /* no encryption for IEEE 802.1X frames */ | |
491 | } | |
492 | ||
493 | if (tx.crypt && (!tx.crypt->ops || !tx.crypt->ops->encrypt_mpdu)) | |
494 | tx.crypt = NULL; | |
274bfb8d JL |
495 | else if ((tx.crypt || |
496 | local->crypt_info.crypt[local->crypt_info.tx_keyidx]) && | |
497 | !no_encrypt) { | |
ff1d2767 JM |
498 | /* Add ISWEP flag both for firmware and host based encryption |
499 | */ | |
831a179f | 500 | fc |= IEEE80211_FCTL_PROTECTED; |
1ea893fd | 501 | hdr->frame_control = cpu_to_le16(fc); |
ff1d2767 | 502 | } else if (local->drop_unencrypted && |
1ea893fd | 503 | ieee80211_is_data(hdr->frame_control) && |
ff1d2767 JM |
504 | meta->ethertype != ETH_P_PAE) { |
505 | if (net_ratelimit()) { | |
506 | printk(KERN_DEBUG "%s: dropped unencrypted TX data " | |
507 | "frame (drop_unencrypted=1)\n", dev->name); | |
508 | } | |
509 | iface->stats.tx_dropped++; | |
ec634fe3 | 510 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
511 | goto fail; |
512 | } | |
513 | ||
514 | if (tx.crypt) { | |
515 | skb = hostap_tx_encrypt(skb, tx.crypt); | |
516 | if (skb == NULL) { | |
517 | printk(KERN_DEBUG "%s: TX - encryption failed\n", | |
518 | dev->name); | |
ec634fe3 | 519 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
520 | goto fail; |
521 | } | |
522 | meta = (struct hostap_skb_tx_data *) skb->cb; | |
523 | if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) { | |
524 | printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, " | |
525 | "expected 0x%08x) after hostap_tx_encrypt\n", | |
526 | dev->name, meta->magic, | |
527 | HOSTAP_SKB_TX_DATA_MAGIC); | |
ec634fe3 | 528 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
529 | iface->stats.tx_dropped++; |
530 | goto fail; | |
531 | } | |
532 | } | |
533 | ||
534 | if (local->func->tx == NULL || local->func->tx(skb, dev)) { | |
ec634fe3 | 535 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
536 | iface->stats.tx_dropped++; |
537 | } else { | |
ec634fe3 | 538 | ret = NETDEV_TX_OK; |
ff1d2767 JM |
539 | iface->stats.tx_packets++; |
540 | iface->stats.tx_bytes += skb->len; | |
541 | } | |
542 | ||
543 | fail: | |
ec634fe3 | 544 | if (ret == NETDEV_TX_OK && skb) |
ff1d2767 JM |
545 | dev_kfree_skb(skb); |
546 | tx_exit: | |
547 | if (tx.sta_ptr) | |
548 | hostap_handle_sta_release(tx.sta_ptr); | |
549 | return ret; | |
550 | } | |
551 | ||
552 | ||
ff1d2767 | 553 | EXPORT_SYMBOL(hostap_master_start_xmit); |