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net: convert print_mac to %pM
[deliverable/linux.git] / drivers / net / wireless / hostap / hostap_80211_rx.c
CommitLineData
ff1d2767 1#include <linux/etherdevice.h>
5fad5a2e 2#include <net/ieee80211_crypt.h>
ff1d2767
JM		 3
4#include "hostap_80211.h"
5#include "hostap.h"
5fad5a2e
AB		 6#include "hostap_ap.h"
7
8/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
9/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
10static unsigned char rfc1042_header[] =
11{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
12/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
13static unsigned char bridge_tunnel_header[] =
14{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
15/* No encapsulation header if EtherType < 0x600 (=length) */
ff1d2767
JM		 16
17void hostap_dump_rx_80211(const char *name, struct sk_buff *skb,
18 struct hostap_80211_rx_status *rx_stats)
19{
d041674d 20 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 21 u16 fc;
22
d041674d 23 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 24
25 printk(KERN_DEBUG "%s: RX signal=%d noise=%d rate=%d len=%d "
26 "jiffies=%ld\n",
27 name, rx_stats->signal, rx_stats->noise, rx_stats->rate,
28 skb->len, jiffies);
29
30 if (skb->len < 2)
31 return;
32
c0f72ca8 33 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767 34 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d)%s%s",
4339d328 35 fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 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),
c0f72ca8 45 le16_to_cpu(hdr->seq_ctl));
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/* Send RX frame to netif with 802.11 (and possible prism) header.
57 * Called from hardware or software IRQ context. */
58int prism2_rx_80211(struct net_device *dev, struct sk_buff *skb,
59 struct hostap_80211_rx_status *rx_stats, int type)
60{
61 struct hostap_interface *iface;
62 local_info_t *local;
63 int hdrlen, phdrlen, head_need, tail_need;
64 u16 fc;
65 int prism_header, ret;
1bcca3c4 66 struct ieee80211_hdr_4addr *fhdr;
ff1d2767
JM		 67
68 iface = netdev_priv(dev);
69 local = iface->local;
70 dev->last_rx = jiffies;
71
72 if (dev->type == ARPHRD_IEEE80211_PRISM) {
73 if (local->monitor_type == PRISM2_MONITOR_PRISM) {
74 prism_header = 1;
75 phdrlen = sizeof(struct linux_wlan_ng_prism_hdr);
76 } else { /* local->monitor_type == PRISM2_MONITOR_CAPHDR */
77 prism_header = 2;
78 phdrlen = sizeof(struct linux_wlan_ng_cap_hdr);
79 }
573b933f
PR		 80 } else if (dev->type == ARPHRD_IEEE80211_RADIOTAP) {
81 prism_header = 3;
82 phdrlen = sizeof(struct hostap_radiotap_rx);
ff1d2767
JM		 83 } else {
84 prism_header = 0;
85 phdrlen = 0;
86 }
87
1bcca3c4
PR		 88 fhdr = (struct ieee80211_hdr_4addr *) skb->data;
89 fc = le16_to_cpu(fhdr->frame_ctl);
ff1d2767 90
b2f4a2e3 91 if (type == PRISM2_RX_MGMT && (fc & IEEE80211_FCTL_VERS)) {
ff1d2767 92 printk(KERN_DEBUG "%s: dropped management frame with header "
b2f4a2e3 93 "version %d\n", dev->name, fc & IEEE80211_FCTL_VERS);
ff1d2767
JM		 94 dev_kfree_skb_any(skb);
95 return 0;
96 }
97
98 hdrlen = hostap_80211_get_hdrlen(fc);
99
100 /* check if there is enough room for extra data; if not, expand skb
101 * buffer to be large enough for the changes */
102 head_need = phdrlen;
103 tail_need = 0;
104#ifdef PRISM2_ADD_BOGUS_CRC
105 tail_need += 4;
106#endif /* PRISM2_ADD_BOGUS_CRC */
107
108 head_need -= skb_headroom(skb);
109 tail_need -= skb_tailroom(skb);
110
111 if (head_need > 0 || tail_need > 0) {
112 if (pskb_expand_head(skb, head_need > 0 ? head_need : 0,
113 tail_need > 0 ? tail_need : 0,
114 GFP_ATOMIC)) {
115 printk(KERN_DEBUG "%s: prism2_rx_80211 failed to "
116 "reallocate skb buffer\n", dev->name);
117 dev_kfree_skb_any(skb);
118 return 0;
119 }
120 }
121
122 /* We now have an skb with enough head and tail room, so just insert
123 * the extra data */
124
125#ifdef PRISM2_ADD_BOGUS_CRC
126 memset(skb_put(skb, 4), 0xff, 4); /* Prism2 strips CRC */
127#endif /* PRISM2_ADD_BOGUS_CRC */
128
129 if (prism_header == 1) {
130 struct linux_wlan_ng_prism_hdr *hdr;
131 hdr = (struct linux_wlan_ng_prism_hdr *)
132 skb_push(skb, phdrlen);
133 memset(hdr, 0, phdrlen);
134 hdr->msgcode = LWNG_CAP_DID_BASE;
135 hdr->msglen = sizeof(*hdr);
136 memcpy(hdr->devname, dev->name, sizeof(hdr->devname));
137#define LWNG_SETVAL(f,i,s,l,d) \
138hdr->f.did = LWNG_CAP_DID_BASE | (i << 12); \
139hdr->f.status = s; hdr->f.len = l; hdr->f.data = d
140 LWNG_SETVAL(hosttime, 1, 0, 4, jiffies);
3e1d3932 141 LWNG_SETVAL(mactime, 2, 0, 4, rx_stats->mac_time);
ff1d2767
JM		 142 LWNG_SETVAL(channel, 3, 1 /* no value */, 4, 0);
143 LWNG_SETVAL(rssi, 4, 1 /* no value */, 4, 0);
144 LWNG_SETVAL(sq, 5, 1 /* no value */, 4, 0);
145 LWNG_SETVAL(signal, 6, 0, 4, rx_stats->signal);
146 LWNG_SETVAL(noise, 7, 0, 4, rx_stats->noise);
147 LWNG_SETVAL(rate, 8, 0, 4, rx_stats->rate / 5);
148 LWNG_SETVAL(istx, 9, 0, 4, 0);
149 LWNG_SETVAL(frmlen, 10, 0, 4, skb->len - phdrlen);
150#undef LWNG_SETVAL
151 } else if (prism_header == 2) {
152 struct linux_wlan_ng_cap_hdr *hdr;
153 hdr = (struct linux_wlan_ng_cap_hdr *)
154 skb_push(skb, phdrlen);
155 memset(hdr, 0, phdrlen);
156 hdr->version = htonl(LWNG_CAPHDR_VERSION);
157 hdr->length = htonl(phdrlen);
158 hdr->mactime = __cpu_to_be64(rx_stats->mac_time);
159 hdr->hosttime = __cpu_to_be64(jiffies);
160 hdr->phytype = htonl(4); /* dss_dot11_b */
161 hdr->channel = htonl(local->channel);
162 hdr->datarate = htonl(rx_stats->rate);
163 hdr->antenna = htonl(0); /* unknown */
164 hdr->priority = htonl(0); /* unknown */
165 hdr->ssi_type = htonl(3); /* raw */
166 hdr->ssi_signal = htonl(rx_stats->signal);
167 hdr->ssi_noise = htonl(rx_stats->noise);
168 hdr->preamble = htonl(0); /* unknown */
169 hdr->encoding = htonl(1); /* cck */
573b933f
PR		 170 } else if (prism_header == 3) {
171 struct hostap_radiotap_rx *hdr;
172 hdr = (struct hostap_radiotap_rx *)skb_push(skb, phdrlen);
173 memset(hdr, 0, phdrlen);
174 hdr->hdr.it_len = cpu_to_le16(phdrlen);
175 hdr->hdr.it_present =
176 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
177 (1 << IEEE80211_RADIOTAP_CHANNEL) |
178 (1 << IEEE80211_RADIOTAP_RATE) |
179 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
180 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE));
181 hdr->tsft = cpu_to_le64(rx_stats->mac_time);
182 hdr->chan_freq = cpu_to_le16(freq_list[local->channel - 1]);
183 hdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_CCK |
184 IEEE80211_CHAN_2GHZ);
185 hdr->rate = rx_stats->rate / 5;
186 hdr->dbm_antsignal = rx_stats->signal;
187 hdr->dbm_antnoise = rx_stats->noise;
ff1d2767
JM		 188 }
189
190 ret = skb->len - phdrlen;
191 skb->dev = dev;
459a98ed 192 skb_reset_mac_header(skb);
ff1d2767
JM		 193 skb_pull(skb, hdrlen);
194 if (prism_header)
195 skb_pull(skb, phdrlen);
196 skb->pkt_type = PACKET_OTHERHOST;
197 skb->protocol = __constant_htons(ETH_P_802_2);
198 memset(skb->cb, 0, sizeof(skb->cb));
199 netif_rx(skb);
200
201 return ret;
202}
203
204
205/* Called only as a tasklet (software IRQ) */
206static void monitor_rx(struct net_device *dev, struct sk_buff *skb,
207 struct hostap_80211_rx_status *rx_stats)
208{
209 struct net_device_stats *stats;
210 int len;
211
212 len = prism2_rx_80211(dev, skb, rx_stats, PRISM2_RX_MONITOR);
213 stats = hostap_get_stats(dev);
214 stats->rx_packets++;
215 stats->rx_bytes += len;
216}
217
218
219/* Called only as a tasklet (software IRQ) */
220static struct prism2_frag_entry *
221prism2_frag_cache_find(local_info_t *local, unsigned int seq,
222 unsigned int frag, u8 *src, u8 *dst)
223{
224 struct prism2_frag_entry *entry;
225 int i;
226
227 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
228 entry = &local->frag_cache[i];
229 if (entry->skb != NULL &&
230 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
231 printk(KERN_DEBUG "%s: expiring fragment cache entry "
232 "seq=%u last_frag=%u\n",
233 local->dev->name, entry->seq, entry->last_frag);
234 dev_kfree_skb(entry->skb);
235 entry->skb = NULL;
236 }
237
238 if (entry->skb != NULL && entry->seq == seq &&
239 (entry->last_frag + 1 == frag || frag == -1) &&
240 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
241 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
242 return entry;
243 }
244
245 return NULL;
246}
247
248
249/* Called only as a tasklet (software IRQ) */
250static struct sk_buff *
d041674d 251prism2_frag_cache_get(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 252{
253 struct sk_buff *skb = NULL;
254 u16 sc;
255 unsigned int frag, seq;
256 struct prism2_frag_entry *entry;
257
c0f72ca8 258 sc = le16_to_cpu(hdr->seq_ctl);
ff1d2767 259 frag = WLAN_GET_SEQ_FRAG(sc);
ebed67d2 260 seq = WLAN_GET_SEQ_SEQ(sc) >> 4;
ff1d2767
JM		 261
262 if (frag == 0) {
263 /* Reserve enough space to fit maximum frame length */
264 skb = dev_alloc_skb(local->dev->mtu +
d041674d 265 sizeof(struct ieee80211_hdr_4addr) +
ff1d2767
JM		 266 8 /* LLC */ +
267 2 /* alignment */ +
268 8 /* WEP */ + ETH_ALEN /* WDS */);
269 if (skb == NULL)
270 return NULL;
271
272 entry = &local->frag_cache[local->frag_next_idx];
273 local->frag_next_idx++;
274 if (local->frag_next_idx >= PRISM2_FRAG_CACHE_LEN)
275 local->frag_next_idx = 0;
276
277 if (entry->skb != NULL)
278 dev_kfree_skb(entry->skb);
279
280 entry->first_frag_time = jiffies;
281 entry->seq = seq;
282 entry->last_frag = frag;
283 entry->skb = skb;
284 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
285 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
286 } else {
287 /* received a fragment of a frame for which the head fragment
288 * should have already been received */
289 entry = prism2_frag_cache_find(local, seq, frag, hdr->addr2,
290 hdr->addr1);
291 if (entry != NULL) {
292 entry->last_frag = frag;
293 skb = entry->skb;
294 }
295 }
296
297 return skb;
298}
299
300
301/* Called only as a tasklet (software IRQ) */
302static int prism2_frag_cache_invalidate(local_info_t *local,
d041674d 303 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 304{
305 u16 sc;
306 unsigned int seq;
307 struct prism2_frag_entry *entry;
308
c0f72ca8 309 sc = le16_to_cpu(hdr->seq_ctl);
ebed67d2 310 seq = WLAN_GET_SEQ_SEQ(sc) >> 4;
ff1d2767
JM		 311
312 entry = prism2_frag_cache_find(local, seq, -1, hdr->addr2, hdr->addr1);
313
314 if (entry == NULL) {
315 printk(KERN_DEBUG "%s: could not invalidate fragment cache "
316 "entry (seq=%u)\n",
317 local->dev->name, seq);
318 return -1;
319 }
320
321 entry->skb = NULL;
322 return 0;
323}
324
325
326static struct hostap_bss_info *__hostap_get_bss(local_info_t *local, u8 *bssid,
327 u8 *ssid, size_t ssid_len)
328{
329 struct list_head *ptr;
330 struct hostap_bss_info *bss;
331
332 list_for_each(ptr, &local->bss_list) {
333 bss = list_entry(ptr, struct hostap_bss_info, list);
334 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0 &&
335 (ssid == NULL ||
336 (ssid_len == bss->ssid_len &&
337 memcmp(ssid, bss->ssid, ssid_len) == 0))) {
338 list_move(&bss->list, &local->bss_list);
339 return bss;
340 }
341 }
342
343 return NULL;
344}
345
346
347static struct hostap_bss_info *__hostap_add_bss(local_info_t *local, u8 *bssid,
348 u8 *ssid, size_t ssid_len)
349{
350 struct hostap_bss_info *bss;
351
352 if (local->num_bss_info >= HOSTAP_MAX_BSS_COUNT) {
353 bss = list_entry(local->bss_list.prev,
354 struct hostap_bss_info, list);
355 list_del(&bss->list);
356 local->num_bss_info--;
357 } else {
358 bss = (struct hostap_bss_info *)
359 kmalloc(sizeof(*bss), GFP_ATOMIC);
360 if (bss == NULL)
361 return NULL;
362 }
363
364 memset(bss, 0, sizeof(*bss));
365 memcpy(bss->bssid, bssid, ETH_ALEN);
366 memcpy(bss->ssid, ssid, ssid_len);
367 bss->ssid_len = ssid_len;
368 local->num_bss_info++;
369 list_add(&bss->list, &local->bss_list);
370 return bss;
371}
372
373
374static void __hostap_expire_bss(local_info_t *local)
375{
376 struct hostap_bss_info *bss;
377
378 while (local->num_bss_info > 0) {
379 bss = list_entry(local->bss_list.prev,
380 struct hostap_bss_info, list);
381 if (!time_after(jiffies, bss->last_update + 60 * HZ))
382 break;
383
384 list_del(&bss->list);
385 local->num_bss_info--;
386 kfree(bss);
387 }
388}
389
390
391/* Both IEEE 802.11 Beacon and Probe Response frames have similar structure, so
392 * the same routine can be used to parse both of them. */
393static void hostap_rx_sta_beacon(local_info_t *local, struct sk_buff *skb,
394 int stype)
395{
396 struct hostap_ieee80211_mgmt *mgmt;
397 int left, chan = 0;
398 u8 *pos;
399 u8 *ssid = NULL, *wpa = NULL, *rsn = NULL;
400 size_t ssid_len = 0, wpa_len = 0, rsn_len = 0;
401 struct hostap_bss_info *bss;
402
403 if (skb->len < IEEE80211_MGMT_HDR_LEN + sizeof(mgmt->u.beacon))
404 return;
405
406 mgmt = (struct hostap_ieee80211_mgmt *) skb->data;
407 pos = mgmt->u.beacon.variable;
408 left = skb->len - (pos - skb->data);
409
410 while (left >= 2) {
411 if (2 + pos[1] > left)
412 return; /* parse failed */
413 switch (*pos) {
414 case WLAN_EID_SSID:
415 ssid = pos + 2;
416 ssid_len = pos[1];
417 break;
418 case WLAN_EID_GENERIC:
419 if (pos[1] >= 4 &&
420 pos[2] == 0x00 && pos[3] == 0x50 &&
421 pos[4] == 0xf2 && pos[5] == 1) {
422 wpa = pos;
423 wpa_len = pos[1] + 2;
424 }
425 break;
426 case WLAN_EID_RSN:
427 rsn = pos;
428 rsn_len = pos[1] + 2;
429 break;
430 case WLAN_EID_DS_PARAMS:
431 if (pos[1] >= 1)
432 chan = pos[2];
433 break;
434 }
435 left -= 2 + pos[1];
436 pos += 2 + pos[1];
437 }
438
439 if (wpa_len > MAX_WPA_IE_LEN)
440 wpa_len = MAX_WPA_IE_LEN;
441 if (rsn_len > MAX_WPA_IE_LEN)
442 rsn_len = MAX_WPA_IE_LEN;
443 if (ssid_len > sizeof(bss->ssid))
444 ssid_len = sizeof(bss->ssid);
445
446 spin_lock(&local->lock);
447 bss = __hostap_get_bss(local, mgmt->bssid, ssid, ssid_len);
448 if (bss == NULL)
449 bss = __hostap_add_bss(local, mgmt->bssid, ssid, ssid_len);
450 if (bss) {
451 bss->last_update = jiffies;
452 bss->count++;
453 bss->capab_info = le16_to_cpu(mgmt->u.beacon.capab_info);
454 if (wpa) {
455 memcpy(bss->wpa_ie, wpa, wpa_len);
456 bss->wpa_ie_len = wpa_len;
457 } else
458 bss->wpa_ie_len = 0;
459 if (rsn) {
460 memcpy(bss->rsn_ie, rsn, rsn_len);
461 bss->rsn_ie_len = rsn_len;
462 } else
463 bss->rsn_ie_len = 0;
464 bss->chan = chan;
465 }
466 __hostap_expire_bss(local);
467 spin_unlock(&local->lock);
468}
469
470
858119e1 471static int
ff1d2767
JM		 472hostap_rx_frame_mgmt(local_info_t *local, struct sk_buff *skb,
473 struct hostap_80211_rx_status *rx_stats, u16 type,
474 u16 stype)
475{
476 if (local->iw_mode == IW_MODE_MASTER) {
d041674d 477 hostap_update_sta_ps(local, (struct ieee80211_hdr_4addr *)
ff1d2767
JM		 478 skb->data);
479 }
480
4339d328
JM		 481 if (local->hostapd && type == IEEE80211_FTYPE_MGMT) {
482 if (stype == IEEE80211_STYPE_BEACON &&
ff1d2767
JM		 483 local->iw_mode == IW_MODE_MASTER) {
484 struct sk_buff *skb2;
485 /* Process beacon frames also in kernel driver to
486 * update STA(AP) table statistics */
487 skb2 = skb_clone(skb, GFP_ATOMIC);
488 if (skb2)
489 hostap_rx(skb2->dev, skb2, rx_stats);
490 }
491
492 /* send management frames to the user space daemon for
493 * processing */
494 local->apdevstats.rx_packets++;
495 local->apdevstats.rx_bytes += skb->len;
496 if (local->apdev == NULL)
497 return -1;
498 prism2_rx_80211(local->apdev, skb, rx_stats, PRISM2_RX_MGMT);
499 return 0;
500 }
501
502 if (local->iw_mode == IW_MODE_MASTER) {
4339d328
JM		 503 if (type != IEEE80211_FTYPE_MGMT &&
504 type != IEEE80211_FTYPE_CTL) {
ff1d2767
JM		 505 printk(KERN_DEBUG "%s: unknown management frame "
506 "(type=0x%02x, stype=0x%02x) dropped\n",
4339d328 507 skb->dev->name, type >> 2, stype >> 4);
ff1d2767
JM		 508 return -1;
509 }
510
511 hostap_rx(skb->dev, skb, rx_stats);
512 return 0;
4339d328
JM		 513 } else if (type == IEEE80211_FTYPE_MGMT &&
514 (stype == IEEE80211_STYPE_BEACON ||
515 stype == IEEE80211_STYPE_PROBE_RESP)) {
ff1d2767
JM		 516 hostap_rx_sta_beacon(local, skb, stype);
517 return -1;
4339d328
JM		 518 } else if (type == IEEE80211_FTYPE_MGMT &&
519 (stype == IEEE80211_STYPE_ASSOC_RESP ||
520 stype == IEEE80211_STYPE_REASSOC_RESP)) {
ff1d2767
JM		 521 /* Ignore (Re)AssocResp silently since these are not currently
522 * needed but are still received when WPA/RSN mode is enabled.
523 */
524 return -1;
525 } else {
526 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: dropped unhandled"
527 " management frame in non-Host AP mode (type=%d:%d)\n",
4339d328 528 skb->dev->name, type >> 2, stype >> 4);
ff1d2767
JM		 529 return -1;
530 }
531}
532
533
534/* Called only as a tasklet (software IRQ) */
858119e1 535static struct net_device *prism2_rx_get_wds(local_info_t *local,
ff1d2767
JM		 536 u8 *addr)
537{
538 struct hostap_interface *iface = NULL;
539 struct list_head *ptr;
540
541 read_lock_bh(&local->iface_lock);
542 list_for_each(ptr, &local->hostap_interfaces) {
543 iface = list_entry(ptr, struct hostap_interface, list);
544 if (iface->type == HOSTAP_INTERFACE_WDS &&
545 memcmp(iface->u.wds.remote_addr, addr, ETH_ALEN) == 0)
546 break;
547 iface = NULL;
548 }
549 read_unlock_bh(&local->iface_lock);
550
551 return iface ? iface->dev : NULL;
552}
553
554
858119e1 555static int
d041674d 556hostap_rx_frame_wds(local_info_t *local, struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 557 u16 fc, struct net_device **wds)
558{
559 /* FIX: is this really supposed to accept WDS frames only in Master
560 * mode? What about Repeater or Managed with WDS frames? */
b2f4a2e3
JM		 561 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) !=
562 (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS) &&
563 (local->iw_mode != IW_MODE_MASTER || !(fc & IEEE80211_FCTL_TODS)))
ff1d2767
JM		 564 return 0; /* not a WDS frame */
565
566 /* Possible WDS frame: either IEEE 802.11 compliant (if FromDS)
567 * or own non-standard frame with 4th address after payload */
568 if (memcmp(hdr->addr1, local->dev->dev_addr, ETH_ALEN) != 0 &&
569 (hdr->addr1[0] != 0xff || hdr->addr1[1] != 0xff ||
570 hdr->addr1[2] != 0xff || hdr->addr1[3] != 0xff ||
571 hdr->addr1[4] != 0xff || hdr->addr1[5] != 0xff)) {
572 /* RA (or BSSID) is not ours - drop */
15ea0ebc 573 PDEBUG(DEBUG_EXTRA2, "%s: received WDS frame with "
e174961c 574 "not own or broadcast %s=%pM\n",
b2f4a2e3
JM		 575 local->dev->name,
576 fc & IEEE80211_FCTL_FROMDS ? "RA" : "BSSID",
e174961c 577 hdr->addr1);
ff1d2767
JM		 578 return -1;
579 }
580
581 /* check if the frame came from a registered WDS connection */
582 *wds = prism2_rx_get_wds(local, hdr->addr2);
b2f4a2e3 583 if (*wds == NULL && fc & IEEE80211_FCTL_FROMDS &&
ff1d2767
JM		 584 (local->iw_mode != IW_MODE_INFRA ||
585 !(local->wds_type & HOSTAP_WDS_AP_CLIENT) ||
586 memcmp(hdr->addr2, local->bssid, ETH_ALEN) != 0)) {
587 /* require that WDS link has been registered with TA or the
588 * frame is from current AP when using 'AP client mode' */
589 PDEBUG(DEBUG_EXTRA, "%s: received WDS[4 addr] frame "
e174961c
JB		 590 "from unknown TA=%pM\n",
591 local->dev->name, hdr->addr2);
ff1d2767
JM		 592 if (local->ap && local->ap->autom_ap_wds)
593 hostap_wds_link_oper(local, hdr->addr2, WDS_ADD);
594 return -1;
595 }
596
b2f4a2e3 597 if (*wds && !(fc & IEEE80211_FCTL_FROMDS) && local->ap &&
ff1d2767
JM		 598 hostap_is_sta_assoc(local->ap, hdr->addr2)) {
599 /* STA is actually associated with us even though it has a
600 * registered WDS link. Assume it is in 'AP client' mode.
601 * Since this is a 3-addr frame, assume it is not (bogus) WDS
602 * frame and process it like any normal ToDS frame from
603 * associated STA. */
604 *wds = NULL;
605 }
606
607 return 0;
608}
609
610
611static int hostap_is_eapol_frame(local_info_t *local, struct sk_buff *skb)
612{
613 struct net_device *dev = local->dev;
614 u16 fc, ethertype;
d041674d 615 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 616 u8 *pos;
617
618 if (skb->len < 24)
619 return 0;
620
d041674d 621 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 622 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 623
624 /* check that the frame is unicast frame to us */
b2f4a2e3
JM		 625 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
626 IEEE80211_FCTL_TODS &&
ff1d2767
JM		 627 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
628 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
629 /* ToDS frame with own addr BSSID and DA */
b2f4a2e3
JM		 630 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
631 IEEE80211_FCTL_FROMDS &&
ff1d2767
JM		 632 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
633 /* FromDS frame with own addr as DA */
634 } else
635 return 0;
636
637 if (skb->len < 24 + 8)
638 return 0;
639
640 /* check for port access entity Ethernet type */
641 pos = skb->data + 24;
642 ethertype = (pos[6] << 8) | pos[7];
643 if (ethertype == ETH_P_PAE)
644 return 1;
645
646 return 0;
647}
648
649
650/* Called only as a tasklet (software IRQ) */
858119e1 651static int
ff1d2767 652hostap_rx_frame_decrypt(local_info_t *local, struct sk_buff *skb,
62fe7e37 653 struct ieee80211_crypt_data *crypt)
ff1d2767 654{
d041674d 655 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 656 int res, hdrlen;
657
658 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
659 return 0;
660
d041674d 661 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 662 hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
ff1d2767
JM		 663
664 if (local->tkip_countermeasures &&
665 strcmp(crypt->ops->name, "TKIP") == 0) {
666 if (net_ratelimit()) {
667 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
e174961c
JB		 668 "received packet from %pM\n",
669 local->dev->name, hdr->addr2);
ff1d2767
JM		 670 }
671 return -1;
672 }
673
674 atomic_inc(&crypt->refcnt);
675 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
676 atomic_dec(&crypt->refcnt);
677 if (res < 0) {
e174961c
JB		 678 printk(KERN_DEBUG "%s: decryption failed (SA=%pM) res=%d\n",
679 local->dev->name, hdr->addr2, res);
ff1d2767
JM		 680 local->comm_tallies.rx_discards_wep_undecryptable++;
681 return -1;
682 }
683
684 return res;
685}
686
687
688/* Called only as a tasklet (software IRQ) */
858119e1 689static int
ff1d2767 690hostap_rx_frame_decrypt_msdu(local_info_t *local, struct sk_buff *skb,
62fe7e37 691 int keyidx, struct ieee80211_crypt_data *crypt)
ff1d2767 692{
d041674d 693 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 694 int res, hdrlen;
695
696 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
697 return 0;
698
d041674d 699 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 700 hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
ff1d2767
JM		 701
702 atomic_inc(&crypt->refcnt);
703 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
704 atomic_dec(&crypt->refcnt);
705 if (res < 0) {
706 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
e174961c
JB		 707 " (SA=%pM keyidx=%d)\n",
708 local->dev->name, hdr->addr2, keyidx);
ff1d2767
JM		 709 return -1;
710 }
711
712 return 0;
713}
714
715
716/* All received frames are sent to this function. @skb contains the frame in
717 * IEEE 802.11 format, i.e., in the format it was sent over air.
718 * This function is called only as a tasklet (software IRQ). */
719void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
720 struct hostap_80211_rx_status *rx_stats)
721{
722 struct hostap_interface *iface;
723 local_info_t *local;
d041674d 724 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 725 size_t hdrlen;
726 u16 fc, type, stype, sc;
727 struct net_device *wds = NULL;
728 struct net_device_stats *stats;
729 unsigned int frag;
730 u8 *payload;
731 struct sk_buff *skb2 = NULL;
732 u16 ethertype;
733 int frame_authorized = 0;
734 int from_assoc_ap = 0;
735 u8 dst[ETH_ALEN];
736 u8 src[ETH_ALEN];
62fe7e37 737 struct ieee80211_crypt_data *crypt = NULL;
ff1d2767
JM		 738 void *sta = NULL;
739 int keyidx = 0;
740
741 iface = netdev_priv(dev);
742 local = iface->local;
743 iface->stats.rx_packets++;
744 iface->stats.rx_bytes += skb->len;
745
746 /* dev is the master radio device; change this to be the default
747 * virtual interface (this may be changed to WDS device below) */
748 dev = local->ddev;
749 iface = netdev_priv(dev);
750
d041674d 751 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 752 stats = hostap_get_stats(dev);
753
754 if (skb->len < 10)
755 goto rx_dropped;
756
c0f72ca8 757 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 758 type = WLAN_FC_GET_TYPE(fc);
759 stype = WLAN_FC_GET_STYPE(fc);
c0f72ca8 760 sc = le16_to_cpu(hdr->seq_ctl);
ff1d2767
JM		 761 frag = WLAN_GET_SEQ_FRAG(sc);
762 hdrlen = hostap_80211_get_hdrlen(fc);
763
764 /* Put this code here so that we avoid duplicating it in all
765 * Rx paths. - Jean II */
766#ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
767 /* If spy monitoring on */
768 if (iface->spy_data.spy_number > 0) {
769 struct iw_quality wstats;
770 wstats.level = rx_stats->signal;
771 wstats.noise = rx_stats->noise;
c28df16e
JT		 772 wstats.updated = IW_QUAL_LEVEL_UPDATED | IW_QUAL_NOISE_UPDATED
773 | IW_QUAL_QUAL_INVALID | IW_QUAL_DBM;
ff1d2767
JM		 774 /* Update spy records */
775 wireless_spy_update(dev, hdr->addr2, &wstats);
776 }
777#endif /* IW_WIRELESS_SPY */
778 hostap_update_rx_stats(local->ap, hdr, rx_stats);
779
780 if (local->iw_mode == IW_MODE_MONITOR) {
781 monitor_rx(dev, skb, rx_stats);
782 return;
783 }
784
785 if (local->host_decrypt) {
786 int idx = 0;
787 if (skb->len >= hdrlen + 3)
788 idx = skb->data[hdrlen + 3] >> 6;
789 crypt = local->crypt[idx];
790 sta = NULL;
791
792 /* Use station specific key to override default keys if the
793 * receiver address is a unicast address ("individual RA"). If
794 * bcrx_sta_key parameter is set, station specific key is used
795 * even with broad/multicast targets (this is against IEEE
796 * 802.11, but makes it easier to use different keys with
797 * stations that do not support WEP key mapping). */
798
799 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
800 (void) hostap_handle_sta_crypto(local, hdr, &crypt,
801 &sta);
802
803 /* allow NULL decrypt to indicate an station specific override
804 * for default encryption */
805 if (crypt && (crypt->ops == NULL ||
806 crypt->ops->decrypt_mpdu == NULL))
807 crypt = NULL;
808
831a179f 809 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
ff1d2767
JM		 810#if 0
811 /* This seems to be triggered by some (multicast?)
812 * frames from other than current BSS, so just drop the
813 * frames silently instead of filling system log with
814 * these reports. */
815 printk(KERN_DEBUG "%s: WEP decryption failed (not set)"
e174961c
JB		 816 " (SA=%pM)\n",
817 local->dev->name, hdr->addr2);
ff1d2767
JM		 818#endif
819 local->comm_tallies.rx_discards_wep_undecryptable++;
820 goto rx_dropped;
821 }
822 }
823
4339d328
JM		 824 if (type != IEEE80211_FTYPE_DATA) {
825 if (type == IEEE80211_FTYPE_MGMT &&
826 stype == IEEE80211_STYPE_AUTH &&
831a179f 827 fc & IEEE80211_FCTL_PROTECTED && local->host_decrypt &&
ff1d2767
JM		 828 (keyidx = hostap_rx_frame_decrypt(local, skb, crypt)) < 0)
829 {
830 printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
e174961c 831 "from %pM\n", dev->name, hdr->addr2);
ff1d2767
JM		 832 /* TODO: could inform hostapd about this so that it
833 * could send auth failure report */
834 goto rx_dropped;
835 }
836
837 if (hostap_rx_frame_mgmt(local, skb, rx_stats, type, stype))
838 goto rx_dropped;
839 else
840 goto rx_exit;
841 }
842
843 /* Data frame - extract src/dst addresses */
844 if (skb->len < IEEE80211_DATA_HDR3_LEN)
845 goto rx_dropped;
846
b2f4a2e3
JM		 847 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
848 case IEEE80211_FCTL_FROMDS:
ff1d2767
JM		 849 memcpy(dst, hdr->addr1, ETH_ALEN);
850 memcpy(src, hdr->addr3, ETH_ALEN);
851 break;
b2f4a2e3 852 case IEEE80211_FCTL_TODS:
ff1d2767
JM		 853 memcpy(dst, hdr->addr3, ETH_ALEN);
854 memcpy(src, hdr->addr2, ETH_ALEN);
855 break;
b2f4a2e3 856 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
ff1d2767
JM		 857 if (skb->len < IEEE80211_DATA_HDR4_LEN)
858 goto rx_dropped;
859 memcpy(dst, hdr->addr3, ETH_ALEN);
860 memcpy(src, hdr->addr4, ETH_ALEN);
861 break;
862 case 0:
863 memcpy(dst, hdr->addr1, ETH_ALEN);
864 memcpy(src, hdr->addr2, ETH_ALEN);
865 break;
866 }
867
868 if (hostap_rx_frame_wds(local, hdr, fc, &wds))
869 goto rx_dropped;
870 if (wds) {
871 skb->dev = dev = wds;
872 stats = hostap_get_stats(dev);
873 }
874
875 if (local->iw_mode == IW_MODE_MASTER && !wds &&
b2f4a2e3
JM		 876 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
877 IEEE80211_FCTL_FROMDS &&
ff1d2767
JM		 878 local->stadev &&
879 memcmp(hdr->addr2, local->assoc_ap_addr, ETH_ALEN) == 0) {
880 /* Frame from BSSID of the AP for which we are a client */
881 skb->dev = dev = local->stadev;
882 stats = hostap_get_stats(dev);
883 from_assoc_ap = 1;
884 }
885
886 dev->last_rx = jiffies;
887
888 if ((local->iw_mode == IW_MODE_MASTER ||
889 local->iw_mode == IW_MODE_REPEAT) &&
890 !from_assoc_ap) {
891 switch (hostap_handle_sta_rx(local, dev, skb, rx_stats,
892 wds != NULL)) {
893 case AP_RX_CONTINUE_NOT_AUTHORIZED:
894 frame_authorized = 0;
895 break;
896 case AP_RX_CONTINUE:
897 frame_authorized = 1;
898 break;
899 case AP_RX_DROP:
900 goto rx_dropped;
901 case AP_RX_EXIT:
902 goto rx_exit;
903 }
904 }
905
906 /* Nullfunc frames may have PS-bit set, so they must be passed to
907 * hostap_handle_sta_rx() before being dropped here. */
4339d328
JM		 908 if (stype != IEEE80211_STYPE_DATA &&
909 stype != IEEE80211_STYPE_DATA_CFACK &&
910 stype != IEEE80211_STYPE_DATA_CFPOLL &&
911 stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
912 if (stype != IEEE80211_STYPE_NULLFUNC)
ff1d2767
JM		 913 printk(KERN_DEBUG "%s: RX: dropped data frame "
914 "with no data (type=0x%02x, subtype=0x%02x)\n",
4339d328 915 dev->name, type >> 2, stype >> 4);
ff1d2767
JM		 916 goto rx_dropped;
917 }
918
919 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
920
831a179f 921 if (local->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
ff1d2767
JM		 922 (keyidx = hostap_rx_frame_decrypt(local, skb, crypt)) < 0)
923 goto rx_dropped;
d041674d 924 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 925
926 /* skb: hdr + (possibly fragmented) plaintext payload */
927
831a179f 928 if (local->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
b2f4a2e3 929 (frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
ff1d2767
JM		 930 int flen;
931 struct sk_buff *frag_skb =
932 prism2_frag_cache_get(local, hdr);
933 if (!frag_skb) {
934 printk(KERN_DEBUG "%s: Rx cannot get skb from "
935 "fragment cache (morefrag=%d seq=%u frag=%u)\n",
b2f4a2e3 936 dev->name, (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
ebed67d2 937 WLAN_GET_SEQ_SEQ(sc) >> 4, frag);
ff1d2767
JM		 938 goto rx_dropped;
939 }
940
941 flen = skb->len;
942 if (frag != 0)
943 flen -= hdrlen;
944
4305b541 945 if (frag_skb->tail + flen > frag_skb->end) {
ff1d2767
JM		 946 printk(KERN_WARNING "%s: host decrypted and "
947 "reassembled frame did not fit skb\n",
948 dev->name);
949 prism2_frag_cache_invalidate(local, hdr);
950 goto rx_dropped;
951 }
952
953 if (frag == 0) {
954 /* copy first fragment (including full headers) into
955 * beginning of the fragment cache skb */
d626f62b
ACM		 956 skb_copy_from_linear_data(skb, skb_put(frag_skb, flen),
957 flen);
ff1d2767
JM		 958 } else {
959 /* append frame payload to the end of the fragment
960 * cache skb */
d626f62b
ACM		 961 skb_copy_from_linear_data_offset(skb, hdrlen,
962 skb_put(frag_skb,
963 flen), flen);
ff1d2767
JM		 964 }
965 dev_kfree_skb(skb);
966 skb = NULL;
967
b2f4a2e3 968 if (fc & IEEE80211_FCTL_MOREFRAGS) {
ff1d2767
JM		 969 /* more fragments expected - leave the skb in fragment
970 * cache for now; it will be delivered to upper layers
971 * after all fragments have been received */
972 goto rx_exit;
973 }
974
975 /* this was the last fragment and the frame will be
976 * delivered, so remove skb from fragment cache */
977 skb = frag_skb;
d041674d 978 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 979 prism2_frag_cache_invalidate(local, hdr);
980 }
981
982 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
983 * encrypted/authenticated */
984
831a179f 985 if (local->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
ff1d2767
JM		 986 hostap_rx_frame_decrypt_msdu(local, skb, keyidx, crypt))
987 goto rx_dropped;
988
d041674d 989 hdr = (struct ieee80211_hdr_4addr *) skb->data;
831a179f 990 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !local->open_wep) {
ff1d2767
JM		 991 if (local->ieee_802_1x &&
992 hostap_is_eapol_frame(local, skb)) {
993 /* pass unencrypted EAPOL frames even if encryption is
994 * configured */
995 PDEBUG(DEBUG_EXTRA2, "%s: RX: IEEE 802.1X - passing "
996 "unencrypted EAPOL frame\n", local->dev->name);
997 } else {
998 printk(KERN_DEBUG "%s: encryption configured, but RX "
e174961c
JB		 999 "frame not encrypted (SA=%pM)\n",
1000 local->dev->name, hdr->addr2);
ff1d2767
JM		 1001 goto rx_dropped;
1002 }
1003 }
1004
831a179f 1005 if (local->drop_unencrypted && !(fc & IEEE80211_FCTL_PROTECTED) &&
ff1d2767
JM		 1006 !hostap_is_eapol_frame(local, skb)) {
1007 if (net_ratelimit()) {
1008 printk(KERN_DEBUG "%s: dropped unencrypted RX data "
e174961c
JB		 1009 "frame from %pM (drop_unencrypted=1)\n",
1010 dev->name, hdr->addr2);
ff1d2767
JM		 1011 }
1012 goto rx_dropped;
1013 }
1014
1015 /* skb: hdr + (possible reassembled) full plaintext payload */
1016
1017 payload = skb->data + hdrlen;
1018 ethertype = (payload[6] << 8) | payload[7];
1019
1020 /* If IEEE 802.1X is used, check whether the port is authorized to send
1021 * the received frame. */
1022 if (local->ieee_802_1x && local->iw_mode == IW_MODE_MASTER) {
1023 if (ethertype == ETH_P_PAE) {
1024 PDEBUG(DEBUG_EXTRA2, "%s: RX: IEEE 802.1X frame\n",
1025 dev->name);
1026 if (local->hostapd && local->apdev) {
1027 /* Send IEEE 802.1X frames to the user
1028 * space daemon for processing */
1029 prism2_rx_80211(local->apdev, skb, rx_stats,
1030 PRISM2_RX_MGMT);
1031 local->apdevstats.rx_packets++;
1032 local->apdevstats.rx_bytes += skb->len;
1033 goto rx_exit;
1034 }
1035 } else if (!frame_authorized) {
1036 printk(KERN_DEBUG "%s: dropped frame from "
1037 "unauthorized port (IEEE 802.1X): "
1038 "ethertype=0x%04x\n",
1039 dev->name, ethertype);
1040 goto rx_dropped;
1041 }
1042 }
1043
1044 /* convert hdr + possible LLC headers into Ethernet header */
1045 if (skb->len - hdrlen >= 8 &&
1046 ((memcmp(payload, rfc1042_header, 6) == 0 &&
1047 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1048 memcmp(payload, bridge_tunnel_header, 6) == 0)) {
1049 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1050 * replace EtherType */
1051 skb_pull(skb, hdrlen + 6);
1052 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1053 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1054 } else {
8a9faf3c 1055 __be16 len;
ff1d2767
JM		 1056 /* Leave Ethernet header part of hdr and full payload */
1057 skb_pull(skb, hdrlen);
1058 len = htons(skb->len);
1059 memcpy(skb_push(skb, 2), &len, 2);
1060 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1061 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1062 }
1063
b2f4a2e3
JM		 1064 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
1065 IEEE80211_FCTL_TODS) &&
ff1d2767
JM		 1066 skb->len >= ETH_HLEN + ETH_ALEN) {
1067 /* Non-standard frame: get addr4 from its bogus location after
1068 * the payload */
d626f62b
ACM		 1069 skb_copy_from_linear_data_offset(skb, skb->len - ETH_ALEN,
1070 skb->data + ETH_ALEN,
1071 ETH_ALEN);
ff1d2767
JM		 1072 skb_trim(skb, skb->len - ETH_ALEN);
1073 }
1074
1075 stats->rx_packets++;
1076 stats->rx_bytes += skb->len;
1077
1078 if (local->iw_mode == IW_MODE_MASTER && !wds &&
1079 local->ap->bridge_packets) {
1080 if (dst[0] & 0x01) {
1081 /* copy multicast frame both to the higher layers and
1082 * to the wireless media */
1083 local->ap->bridged_multicast++;
1084 skb2 = skb_clone(skb, GFP_ATOMIC);
1085 if (skb2 == NULL)
1086 printk(KERN_DEBUG "%s: skb_clone failed for "
1087 "multicast frame\n", dev->name);
1088 } else if (hostap_is_sta_authorized(local->ap, dst)) {
1089 /* send frame directly to the associated STA using
1090 * wireless media and not passing to higher layers */
1091 local->ap->bridged_unicast++;
1092 skb2 = skb;
1093 skb = NULL;
1094 }
1095 }
1096
1097 if (skb2 != NULL) {
1098 /* send to wireless media */
459a98ed 1099 skb2->dev = dev;
ff1d2767 1100 skb2->protocol = __constant_htons(ETH_P_802_3);
459a98ed 1101 skb_reset_mac_header(skb2);
c1d2bbe1 1102 skb_reset_network_header(skb2);
b0e380b1 1103 /* skb2->network_header += ETH_HLEN; */
ff1d2767
JM		 1104 dev_queue_xmit(skb2);
1105 }
1106
1107 if (skb) {
1108 skb->protocol = eth_type_trans(skb, dev);
1109 memset(skb->cb, 0, sizeof(skb->cb));
ff1d2767
JM		 1110 netif_rx(skb);
1111 }
1112
1113 rx_exit:
1114 if (sta)
1115 hostap_handle_sta_release(sta);
1116 return;
1117
1118 rx_dropped:
1119 dev_kfree_skb(skb);
1120
1121 stats->rx_dropped++;
1122 goto rx_exit;
1123}
1124
1125
1126EXPORT_SYMBOL(hostap_80211_rx);
Linux kernel - Deliverables
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