projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6-block.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 21 u16 fc;
0795af57 22 DECLARE_MAC_BUF(mac);
ff1d2767 23
d041674d 24 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 25
26 printk(KERN_DEBUG "%s: RX signal=%d noise=%d rate=%d len=%d "
27 "jiffies=%ld\n",
28 name, rx_stats->signal, rx_stats->noise, rx_stats->rate,
29 skb->len, jiffies);
30
31 if (skb->len < 2)
32 return;
33
c0f72ca8 34 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767 35 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d)%s%s",
4339d328 36 fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
b2f4a2e3
JM		 37 fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
38 fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
ff1d2767
JM		 39
40 if (skb->len < IEEE80211_DATA_HDR3_LEN) {
41 printk("\n");
42 return;
43 }
44
45 printk(" dur=0x%04x seq=0x%04x\n", le16_to_cpu(hdr->duration_id),
c0f72ca8 46 le16_to_cpu(hdr->seq_ctl));
ff1d2767 47
0795af57
JP		 48 printk(KERN_DEBUG " A1=%s", print_mac(mac, hdr->addr1));
49 printk(" A2=%s", print_mac(mac, hdr->addr2));
50 printk(" A3=%s", print_mac(mac, hdr->addr3));
ff1d2767 51 if (skb->len >= 30)
0795af57 52 printk(" A4=%s", print_mac(mac, hdr->addr4));
ff1d2767
JM		 53 printk("\n");
54}
55
56
57/* Send RX frame to netif with 802.11 (and possible prism) header.
58 * Called from hardware or software IRQ context. */
59int prism2_rx_80211(struct net_device *dev, struct sk_buff *skb,
60 struct hostap_80211_rx_status *rx_stats, int type)
61{
62 struct hostap_interface *iface;
63 local_info_t *local;
64 int hdrlen, phdrlen, head_need, tail_need;
65 u16 fc;
66 int prism_header, ret;
1bcca3c4 67 struct ieee80211_hdr_4addr *fhdr;
ff1d2767
JM		 68
69 iface = netdev_priv(dev);
70 local = iface->local;
71 dev->last_rx = jiffies;
72
73 if (dev->type == ARPHRD_IEEE80211_PRISM) {
74 if (local->monitor_type == PRISM2_MONITOR_PRISM) {
75 prism_header = 1;
76 phdrlen = sizeof(struct linux_wlan_ng_prism_hdr);
77 } else { /* local->monitor_type == PRISM2_MONITOR_CAPHDR */
78 prism_header = 2;
79 phdrlen = sizeof(struct linux_wlan_ng_cap_hdr);
80 }
573b933f
PR		 81 } else if (dev->type == ARPHRD_IEEE80211_RADIOTAP) {
82 prism_header = 3;
83 phdrlen = sizeof(struct hostap_radiotap_rx);
ff1d2767
JM		 84 } else {
85 prism_header = 0;
86 phdrlen = 0;
87 }
88
1bcca3c4
PR		 89 fhdr = (struct ieee80211_hdr_4addr *) skb->data;
90 fc = le16_to_cpu(fhdr->frame_ctl);
ff1d2767 91
b2f4a2e3 92 if (type == PRISM2_RX_MGMT && (fc & IEEE80211_FCTL_VERS)) {
ff1d2767 93 printk(KERN_DEBUG "%s: dropped management frame with header "
b2f4a2e3 94 "version %d\n", dev->name, fc & IEEE80211_FCTL_VERS);
ff1d2767
JM		 95 dev_kfree_skb_any(skb);
96 return 0;
97 }
98
99 hdrlen = hostap_80211_get_hdrlen(fc);
100
101 /* check if there is enough room for extra data; if not, expand skb
102 * buffer to be large enough for the changes */
103 head_need = phdrlen;
104 tail_need = 0;
105#ifdef PRISM2_ADD_BOGUS_CRC
106 tail_need += 4;
107#endif /* PRISM2_ADD_BOGUS_CRC */
108
109 head_need -= skb_headroom(skb);
110 tail_need -= skb_tailroom(skb);
111
112 if (head_need > 0 || tail_need > 0) {
113 if (pskb_expand_head(skb, head_need > 0 ? head_need : 0,
114 tail_need > 0 ? tail_need : 0,
115 GFP_ATOMIC)) {
116 printk(KERN_DEBUG "%s: prism2_rx_80211 failed to "
117 "reallocate skb buffer\n", dev->name);
118 dev_kfree_skb_any(skb);
119 return 0;
120 }
121 }
122
123 /* We now have an skb with enough head and tail room, so just insert
124 * the extra data */
125
126#ifdef PRISM2_ADD_BOGUS_CRC
127 memset(skb_put(skb, 4), 0xff, 4); /* Prism2 strips CRC */
128#endif /* PRISM2_ADD_BOGUS_CRC */
129
130 if (prism_header == 1) {
131 struct linux_wlan_ng_prism_hdr *hdr;
132 hdr = (struct linux_wlan_ng_prism_hdr *)
133 skb_push(skb, phdrlen);
134 memset(hdr, 0, phdrlen);
135 hdr->msgcode = LWNG_CAP_DID_BASE;
136 hdr->msglen = sizeof(*hdr);
137 memcpy(hdr->devname, dev->name, sizeof(hdr->devname));
138#define LWNG_SETVAL(f,i,s,l,d) \
139hdr->f.did = LWNG_CAP_DID_BASE | (i << 12); \
140hdr->f.status = s; hdr->f.len = l; hdr->f.data = d
141 LWNG_SETVAL(hosttime, 1, 0, 4, jiffies);
3e1d3932 142 LWNG_SETVAL(mactime, 2, 0, 4, rx_stats->mac_time);
ff1d2767
JM		 143 LWNG_SETVAL(channel, 3, 1 /* no value */, 4, 0);
144 LWNG_SETVAL(rssi, 4, 1 /* no value */, 4, 0);
145 LWNG_SETVAL(sq, 5, 1 /* no value */, 4, 0);
146 LWNG_SETVAL(signal, 6, 0, 4, rx_stats->signal);
147 LWNG_SETVAL(noise, 7, 0, 4, rx_stats->noise);
148 LWNG_SETVAL(rate, 8, 0, 4, rx_stats->rate / 5);
149 LWNG_SETVAL(istx, 9, 0, 4, 0);
150 LWNG_SETVAL(frmlen, 10, 0, 4, skb->len - phdrlen);
151#undef LWNG_SETVAL
152 } else if (prism_header == 2) {
153 struct linux_wlan_ng_cap_hdr *hdr;
154 hdr = (struct linux_wlan_ng_cap_hdr *)
155 skb_push(skb, phdrlen);
156 memset(hdr, 0, phdrlen);
157 hdr->version = htonl(LWNG_CAPHDR_VERSION);
158 hdr->length = htonl(phdrlen);
159 hdr->mactime = __cpu_to_be64(rx_stats->mac_time);
160 hdr->hosttime = __cpu_to_be64(jiffies);
161 hdr->phytype = htonl(4); /* dss_dot11_b */
162 hdr->channel = htonl(local->channel);
163 hdr->datarate = htonl(rx_stats->rate);
164 hdr->antenna = htonl(0); /* unknown */
165 hdr->priority = htonl(0); /* unknown */
166 hdr->ssi_type = htonl(3); /* raw */
167 hdr->ssi_signal = htonl(rx_stats->signal);
168 hdr->ssi_noise = htonl(rx_stats->noise);
169 hdr->preamble = htonl(0); /* unknown */
170 hdr->encoding = htonl(1); /* cck */
573b933f
PR		 171 } else if (prism_header == 3) {
172 struct hostap_radiotap_rx *hdr;
173 hdr = (struct hostap_radiotap_rx *)skb_push(skb, phdrlen);
174 memset(hdr, 0, phdrlen);
175 hdr->hdr.it_len = cpu_to_le16(phdrlen);
176 hdr->hdr.it_present =
177 cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
178 (1 << IEEE80211_RADIOTAP_CHANNEL) |
179 (1 << IEEE80211_RADIOTAP_RATE) |
180 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
181 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE));
182 hdr->tsft = cpu_to_le64(rx_stats->mac_time);
183 hdr->chan_freq = cpu_to_le16(freq_list[local->channel - 1]);
184 hdr->chan_flags = cpu_to_le16(IEEE80211_CHAN_CCK |
185 IEEE80211_CHAN_2GHZ);
186 hdr->rate = rx_stats->rate / 5;
187 hdr->dbm_antsignal = rx_stats->signal;
188 hdr->dbm_antnoise = rx_stats->noise;
ff1d2767
JM		 189 }
190
191 ret = skb->len - phdrlen;
192 skb->dev = dev;
459a98ed 193 skb_reset_mac_header(skb);
ff1d2767
JM		 194 skb_pull(skb, hdrlen);
195 if (prism_header)
196 skb_pull(skb, phdrlen);
197 skb->pkt_type = PACKET_OTHERHOST;
198 skb->protocol = __constant_htons(ETH_P_802_2);
199 memset(skb->cb, 0, sizeof(skb->cb));
200 netif_rx(skb);
201
202 return ret;
203}
204
205
206/* Called only as a tasklet (software IRQ) */
207static void monitor_rx(struct net_device *dev, struct sk_buff *skb,
208 struct hostap_80211_rx_status *rx_stats)
209{
210 struct net_device_stats *stats;
211 int len;
212
213 len = prism2_rx_80211(dev, skb, rx_stats, PRISM2_RX_MONITOR);
214 stats = hostap_get_stats(dev);
215 stats->rx_packets++;
216 stats->rx_bytes += len;
217}
218
219
220/* Called only as a tasklet (software IRQ) */
221static struct prism2_frag_entry *
222prism2_frag_cache_find(local_info_t *local, unsigned int seq,
223 unsigned int frag, u8 *src, u8 *dst)
224{
225 struct prism2_frag_entry *entry;
226 int i;
227
228 for (i = 0; i < PRISM2_FRAG_CACHE_LEN; i++) {
229 entry = &local->frag_cache[i];
230 if (entry->skb != NULL &&
231 time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
232 printk(KERN_DEBUG "%s: expiring fragment cache entry "
233 "seq=%u last_frag=%u\n",
234 local->dev->name, entry->seq, entry->last_frag);
235 dev_kfree_skb(entry->skb);
236 entry->skb = NULL;
237 }
238
239 if (entry->skb != NULL && entry->seq == seq &&
240 (entry->last_frag + 1 == frag || frag == -1) &&
241 memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
242 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
243 return entry;
244 }
245
246 return NULL;
247}
248
249
250/* Called only as a tasklet (software IRQ) */
251static struct sk_buff *
d041674d 252prism2_frag_cache_get(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 253{
254 struct sk_buff *skb = NULL;
255 u16 sc;
256 unsigned int frag, seq;
257 struct prism2_frag_entry *entry;
258
c0f72ca8 259 sc = le16_to_cpu(hdr->seq_ctl);
ff1d2767 260 frag = WLAN_GET_SEQ_FRAG(sc);
ebed67d2 261 seq = WLAN_GET_SEQ_SEQ(sc) >> 4;
ff1d2767
JM		 262
263 if (frag == 0) {
264 /* Reserve enough space to fit maximum frame length */
265 skb = dev_alloc_skb(local->dev->mtu +
d041674d 266 sizeof(struct ieee80211_hdr_4addr) +
ff1d2767
JM		 267 8 /* LLC */ +
268 2 /* alignment */ +
269 8 /* WEP */ + ETH_ALEN /* WDS */);
270 if (skb == NULL)
271 return NULL;
272
273 entry = &local->frag_cache[local->frag_next_idx];
274 local->frag_next_idx++;
275 if (local->frag_next_idx >= PRISM2_FRAG_CACHE_LEN)
276 local->frag_next_idx = 0;
277
278 if (entry->skb != NULL)
279 dev_kfree_skb(entry->skb);
280
281 entry->first_frag_time = jiffies;
282 entry->seq = seq;
283 entry->last_frag = frag;
284 entry->skb = skb;
285 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
286 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
287 } else {
288 /* received a fragment of a frame for which the head fragment
289 * should have already been received */
290 entry = prism2_frag_cache_find(local, seq, frag, hdr->addr2,
291 hdr->addr1);
292 if (entry != NULL) {
293 entry->last_frag = frag;
294 skb = entry->skb;
295 }
296 }
297
298 return skb;
299}
300
301
302/* Called only as a tasklet (software IRQ) */
303static int prism2_frag_cache_invalidate(local_info_t *local,
d041674d 304 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 305{
306 u16 sc;
307 unsigned int seq;
308 struct prism2_frag_entry *entry;
309
c0f72ca8 310 sc = le16_to_cpu(hdr->seq_ctl);
ebed67d2 311 seq = WLAN_GET_SEQ_SEQ(sc) >> 4;
ff1d2767
JM		 312
313 entry = prism2_frag_cache_find(local, seq, -1, hdr->addr2, hdr->addr1);
314
315 if (entry == NULL) {
316 printk(KERN_DEBUG "%s: could not invalidate fragment cache "
317 "entry (seq=%u)\n",
318 local->dev->name, seq);
319 return -1;
320 }
321
322 entry->skb = NULL;
323 return 0;
324}
325
326
327static struct hostap_bss_info *__hostap_get_bss(local_info_t *local, u8 *bssid,
328 u8 *ssid, size_t ssid_len)
329{
330 struct list_head *ptr;
331 struct hostap_bss_info *bss;
332
333 list_for_each(ptr, &local->bss_list) {
334 bss = list_entry(ptr, struct hostap_bss_info, list);
335 if (memcmp(bss->bssid, bssid, ETH_ALEN) == 0 &&
336 (ssid == NULL ||
337 (ssid_len == bss->ssid_len &&
338 memcmp(ssid, bss->ssid, ssid_len) == 0))) {
339 list_move(&bss->list, &local->bss_list);
340 return bss;
341 }
342 }
343
344 return NULL;
345}
346
347
348static struct hostap_bss_info *__hostap_add_bss(local_info_t *local, u8 *bssid,
349 u8 *ssid, size_t ssid_len)
350{
351 struct hostap_bss_info *bss;
352
353 if (local->num_bss_info >= HOSTAP_MAX_BSS_COUNT) {
354 bss = list_entry(local->bss_list.prev,
355 struct hostap_bss_info, list);
356 list_del(&bss->list);
357 local->num_bss_info--;
358 } else {
359 bss = (struct hostap_bss_info *)
360 kmalloc(sizeof(*bss), GFP_ATOMIC);
361 if (bss == NULL)
362 return NULL;
363 }
364
365 memset(bss, 0, sizeof(*bss));
366 memcpy(bss->bssid, bssid, ETH_ALEN);
367 memcpy(bss->ssid, ssid, ssid_len);
368 bss->ssid_len = ssid_len;
369 local->num_bss_info++;
370 list_add(&bss->list, &local->bss_list);
371 return bss;
372}
373
374
375static void __hostap_expire_bss(local_info_t *local)
376{
377 struct hostap_bss_info *bss;
378
379 while (local->num_bss_info > 0) {
380 bss = list_entry(local->bss_list.prev,
381 struct hostap_bss_info, list);
382 if (!time_after(jiffies, bss->last_update + 60 * HZ))
383 break;
384
385 list_del(&bss->list);
386 local->num_bss_info--;
387 kfree(bss);
388 }
389}
390
391
392/* Both IEEE 802.11 Beacon and Probe Response frames have similar structure, so
393 * the same routine can be used to parse both of them. */
394static void hostap_rx_sta_beacon(local_info_t *local, struct sk_buff *skb,
395 int stype)
396{
397 struct hostap_ieee80211_mgmt *mgmt;
398 int left, chan = 0;
399 u8 *pos;
400 u8 *ssid = NULL, *wpa = NULL, *rsn = NULL;
401 size_t ssid_len = 0, wpa_len = 0, rsn_len = 0;
402 struct hostap_bss_info *bss;
403
404 if (skb->len < IEEE80211_MGMT_HDR_LEN + sizeof(mgmt->u.beacon))
405 return;
406
407 mgmt = (struct hostap_ieee80211_mgmt *) skb->data;
408 pos = mgmt->u.beacon.variable;
409 left = skb->len - (pos - skb->data);
410
411 while (left >= 2) {
412 if (2 + pos[1] > left)
413 return; /* parse failed */
414 switch (*pos) {
415 case WLAN_EID_SSID:
416 ssid = pos + 2;
417 ssid_len = pos[1];
418 break;
419 case WLAN_EID_GENERIC:
420 if (pos[1] >= 4 &&
421 pos[2] == 0x00 && pos[3] == 0x50 &&
422 pos[4] == 0xf2 && pos[5] == 1) {
423 wpa = pos;
424 wpa_len = pos[1] + 2;
425 }
426 break;
427 case WLAN_EID_RSN:
428 rsn = pos;
429 rsn_len = pos[1] + 2;
430 break;
431 case WLAN_EID_DS_PARAMS:
432 if (pos[1] >= 1)
433 chan = pos[2];
434 break;
435 }
436 left -= 2 + pos[1];
437 pos += 2 + pos[1];
438 }
439
440 if (wpa_len > MAX_WPA_IE_LEN)
441 wpa_len = MAX_WPA_IE_LEN;
442 if (rsn_len > MAX_WPA_IE_LEN)
443 rsn_len = MAX_WPA_IE_LEN;
444 if (ssid_len > sizeof(bss->ssid))
445 ssid_len = sizeof(bss->ssid);
446
447 spin_lock(&local->lock);
448 bss = __hostap_get_bss(local, mgmt->bssid, ssid, ssid_len);
449 if (bss == NULL)
450 bss = __hostap_add_bss(local, mgmt->bssid, ssid, ssid_len);
451 if (bss) {
452 bss->last_update = jiffies;
453 bss->count++;
454 bss->capab_info = le16_to_cpu(mgmt->u.beacon.capab_info);
455 if (wpa) {
456 memcpy(bss->wpa_ie, wpa, wpa_len);
457 bss->wpa_ie_len = wpa_len;
458 } else
459 bss->wpa_ie_len = 0;
460 if (rsn) {
461 memcpy(bss->rsn_ie, rsn, rsn_len);
462 bss->rsn_ie_len = rsn_len;
463 } else
464 bss->rsn_ie_len = 0;
465 bss->chan = chan;
466 }
467 __hostap_expire_bss(local);
468 spin_unlock(&local->lock);
469}
470
471
858119e1 472static int
ff1d2767
JM		 473hostap_rx_frame_mgmt(local_info_t *local, struct sk_buff *skb,
474 struct hostap_80211_rx_status *rx_stats, u16 type,
475 u16 stype)
476{
477 if (local->iw_mode == IW_MODE_MASTER) {
d041674d 478 hostap_update_sta_ps(local, (struct ieee80211_hdr_4addr *)
ff1d2767
JM		 479 skb->data);
480 }
481
4339d328
JM		 482 if (local->hostapd && type == IEEE80211_FTYPE_MGMT) {
483 if (stype == IEEE80211_STYPE_BEACON &&
ff1d2767
JM		 484 local->iw_mode == IW_MODE_MASTER) {
485 struct sk_buff *skb2;
486 /* Process beacon frames also in kernel driver to
487 * update STA(AP) table statistics */
488 skb2 = skb_clone(skb, GFP_ATOMIC);
489 if (skb2)
490 hostap_rx(skb2->dev, skb2, rx_stats);
491 }
492
493 /* send management frames to the user space daemon for
494 * processing */
495 local->apdevstats.rx_packets++;
496 local->apdevstats.rx_bytes += skb->len;
497 if (local->apdev == NULL)
498 return -1;
499 prism2_rx_80211(local->apdev, skb, rx_stats, PRISM2_RX_MGMT);
500 return 0;
501 }
502
503 if (local->iw_mode == IW_MODE_MASTER) {
4339d328
JM		 504 if (type != IEEE80211_FTYPE_MGMT &&
505 type != IEEE80211_FTYPE_CTL) {
ff1d2767
JM		 506 printk(KERN_DEBUG "%s: unknown management frame "
507 "(type=0x%02x, stype=0x%02x) dropped\n",
4339d328 508 skb->dev->name, type >> 2, stype >> 4);
ff1d2767
JM		 509 return -1;
510 }
511
512 hostap_rx(skb->dev, skb, rx_stats);
513 return 0;
4339d328
JM		 514 } else if (type == IEEE80211_FTYPE_MGMT &&
515 (stype == IEEE80211_STYPE_BEACON ||
516 stype == IEEE80211_STYPE_PROBE_RESP)) {
ff1d2767
JM		 517 hostap_rx_sta_beacon(local, skb, stype);
518 return -1;
4339d328
JM		 519 } else if (type == IEEE80211_FTYPE_MGMT &&
520 (stype == IEEE80211_STYPE_ASSOC_RESP ||
521 stype == IEEE80211_STYPE_REASSOC_RESP)) {
ff1d2767
JM		 522 /* Ignore (Re)AssocResp silently since these are not currently
523 * needed but are still received when WPA/RSN mode is enabled.
524 */
525 return -1;
526 } else {
527 printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: dropped unhandled"
528 " management frame in non-Host AP mode (type=%d:%d)\n",
4339d328 529 skb->dev->name, type >> 2, stype >> 4);
ff1d2767
JM		 530 return -1;
531 }
532}
533
534
535/* Called only as a tasklet (software IRQ) */
858119e1 536static struct net_device *prism2_rx_get_wds(local_info_t *local,
ff1d2767
JM		 537 u8 *addr)
538{
539 struct hostap_interface *iface = NULL;
540 struct list_head *ptr;
541
542 read_lock_bh(&local->iface_lock);
543 list_for_each(ptr, &local->hostap_interfaces) {
544 iface = list_entry(ptr, struct hostap_interface, list);
545 if (iface->type == HOSTAP_INTERFACE_WDS &&
546 memcmp(iface->u.wds.remote_addr, addr, ETH_ALEN) == 0)
547 break;
548 iface = NULL;
549 }
550 read_unlock_bh(&local->iface_lock);
551
552 return iface ? iface->dev : NULL;
553}
554
555
858119e1 556static int
d041674d 557hostap_rx_frame_wds(local_info_t *local, struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 558 u16 fc, struct net_device **wds)
559{
0795af57 560 DECLARE_MAC_BUF(mac);
ff1d2767
JM		 561 /* FIX: is this really supposed to accept WDS frames only in Master
562 * mode? What about Repeater or Managed with WDS frames? */
b2f4a2e3
JM		 563 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) !=
564 (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS) &&
565 (local->iw_mode != IW_MODE_MASTER || !(fc & IEEE80211_FCTL_TODS)))
ff1d2767
JM		 566 return 0; /* not a WDS frame */
567
568 /* Possible WDS frame: either IEEE 802.11 compliant (if FromDS)
569 * or own non-standard frame with 4th address after payload */
570 if (memcmp(hdr->addr1, local->dev->dev_addr, ETH_ALEN) != 0 &&
571 (hdr->addr1[0] != 0xff || hdr->addr1[1] != 0xff ||
572 hdr->addr1[2] != 0xff || hdr->addr1[3] != 0xff ||
573 hdr->addr1[4] != 0xff || hdr->addr1[5] != 0xff)) {
574 /* RA (or BSSID) is not ours - drop */
15ea0ebc 575 PDEBUG(DEBUG_EXTRA2, "%s: received WDS frame with "
0795af57 576 "not own or broadcast %s=%s\n",
b2f4a2e3
JM		 577 local->dev->name,
578 fc & IEEE80211_FCTL_FROMDS ? "RA" : "BSSID",
0795af57 579 print_mac(mac, hdr->addr1));
ff1d2767
JM		 580 return -1;
581 }
582
583 /* check if the frame came from a registered WDS connection */
584 *wds = prism2_rx_get_wds(local, hdr->addr2);
b2f4a2e3 585 if (*wds == NULL && fc & IEEE80211_FCTL_FROMDS &&
ff1d2767
JM		 586 (local->iw_mode != IW_MODE_INFRA ||
587 !(local->wds_type & HOSTAP_WDS_AP_CLIENT) ||
588 memcmp(hdr->addr2, local->bssid, ETH_ALEN) != 0)) {
589 /* require that WDS link has been registered with TA or the
590 * frame is from current AP when using 'AP client mode' */
591 PDEBUG(DEBUG_EXTRA, "%s: received WDS[4 addr] frame "
0795af57
JP		 592 "from unknown TA=%s\n",
593 local->dev->name, print_mac(mac, hdr->addr2));
ff1d2767
JM		 594 if (local->ap && local->ap->autom_ap_wds)
595 hostap_wds_link_oper(local, hdr->addr2, WDS_ADD);
596 return -1;
597 }
598
b2f4a2e3 599 if (*wds && !(fc & IEEE80211_FCTL_FROMDS) && local->ap &&
ff1d2767
JM		 600 hostap_is_sta_assoc(local->ap, hdr->addr2)) {
601 /* STA is actually associated with us even though it has a
602 * registered WDS link. Assume it is in 'AP client' mode.
603 * Since this is a 3-addr frame, assume it is not (bogus) WDS
604 * frame and process it like any normal ToDS frame from
605 * associated STA. */
606 *wds = NULL;
607 }
608
609 return 0;
610}
611
612
613static int hostap_is_eapol_frame(local_info_t *local, struct sk_buff *skb)
614{
615 struct net_device *dev = local->dev;
616 u16 fc, ethertype;
d041674d 617 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 618 u8 *pos;
619
620 if (skb->len < 24)
621 return 0;
622
d041674d 623 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 624 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 625
626 /* check that the frame is unicast frame to us */
b2f4a2e3
JM		 627 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
628 IEEE80211_FCTL_TODS &&
ff1d2767
JM		 629 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
630 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
631 /* ToDS frame with own addr BSSID and DA */
b2f4a2e3
JM		 632 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
633 IEEE80211_FCTL_FROMDS &&
ff1d2767
JM		 634 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
635 /* FromDS frame with own addr as DA */
636 } else
637 return 0;
638
639 if (skb->len < 24 + 8)
640 return 0;
641
642 /* check for port access entity Ethernet type */
643 pos = skb->data + 24;
644 ethertype = (pos[6] << 8) | pos[7];
645 if (ethertype == ETH_P_PAE)
646 return 1;
647
648 return 0;
649}
650
651
652/* Called only as a tasklet (software IRQ) */
858119e1 653static int
ff1d2767 654hostap_rx_frame_decrypt(local_info_t *local, struct sk_buff *skb,
62fe7e37 655 struct ieee80211_crypt_data *crypt)
ff1d2767 656{
d041674d 657 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 658 int res, hdrlen;
659
660 if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
661 return 0;
662
d041674d 663 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 664 hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
ff1d2767
JM		 665
666 if (local->tkip_countermeasures &&
667 strcmp(crypt->ops->name, "TKIP") == 0) {
668 if (net_ratelimit()) {
669 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
21f644f3
DM		 670 "received packet from " MAC_FMT "\n",
671 local->dev->name,
672 hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
673 hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
ff1d2767
JM		 674 }
675 return -1;
676 }
677
678 atomic_inc(&crypt->refcnt);
679 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
680 atomic_dec(&crypt->refcnt);
681 if (res < 0) {
21f644f3 682 printk(KERN_DEBUG "%s: decryption failed (SA=" MAC_FMT
ff1d2767 683 ") res=%d\n",
21f644f3
DM		 684 local->dev->name,
685 hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
686 hdr->addr2[3], hdr->addr2[4], hdr->addr2[5],
687 res);
ff1d2767
JM		 688 local->comm_tallies.rx_discards_wep_undecryptable++;
689 return -1;
690 }
691
692 return res;
693}
694
695
696/* Called only as a tasklet (software IRQ) */
858119e1 697static int
ff1d2767 698hostap_rx_frame_decrypt_msdu(local_info_t *local, struct sk_buff *skb,
62fe7e37 699 int keyidx, struct ieee80211_crypt_data *crypt)
ff1d2767 700{
d041674d 701 struct ieee80211_hdr_4addr *hdr;
ff1d2767 702 int res, hdrlen;
0795af57 703 DECLARE_MAC_BUF(mac);
ff1d2767
JM		 704
705 if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
706 return 0;
707
d041674d 708 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 709 hdrlen = hostap_80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
ff1d2767
JM		 710
711 atomic_inc(&crypt->refcnt);
712 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
713 atomic_dec(&crypt->refcnt);
714 if (res < 0) {
715 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
0795af57
JP		 716 " (SA=%s keyidx=%d)\n",
717 local->dev->name, print_mac(mac, hdr->addr2), keyidx);
ff1d2767
JM		 718 return -1;
719 }
720
721 return 0;
722}
723
724
725/* All received frames are sent to this function. @skb contains the frame in
726 * IEEE 802.11 format, i.e., in the format it was sent over air.
727 * This function is called only as a tasklet (software IRQ). */
728void hostap_80211_rx(struct net_device *dev, struct sk_buff *skb,
729 struct hostap_80211_rx_status *rx_stats)
730{
731 struct hostap_interface *iface;
732 local_info_t *local;
d041674d 733 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 734 size_t hdrlen;
735 u16 fc, type, stype, sc;
736 struct net_device *wds = NULL;
737 struct net_device_stats *stats;
738 unsigned int frag;
739 u8 *payload;
740 struct sk_buff *skb2 = NULL;
741 u16 ethertype;
742 int frame_authorized = 0;
743 int from_assoc_ap = 0;
744 u8 dst[ETH_ALEN];
745 u8 src[ETH_ALEN];
62fe7e37 746 struct ieee80211_crypt_data *crypt = NULL;
ff1d2767
JM		 747 void *sta = NULL;
748 int keyidx = 0;
749
750 iface = netdev_priv(dev);
751 local = iface->local;
752 iface->stats.rx_packets++;
753 iface->stats.rx_bytes += skb->len;
754
755 /* dev is the master radio device; change this to be the default
756 * virtual interface (this may be changed to WDS device below) */
757 dev = local->ddev;
758 iface = netdev_priv(dev);
759
d041674d 760 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 761 stats = hostap_get_stats(dev);
762
763 if (skb->len < 10)
764 goto rx_dropped;
765
c0f72ca8 766 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 767 type = WLAN_FC_GET_TYPE(fc);
768 stype = WLAN_FC_GET_STYPE(fc);
c0f72ca8 769 sc = le16_to_cpu(hdr->seq_ctl);
ff1d2767
JM		 770 frag = WLAN_GET_SEQ_FRAG(sc);
771 hdrlen = hostap_80211_get_hdrlen(fc);
772
773 /* Put this code here so that we avoid duplicating it in all
774 * Rx paths. - Jean II */
775#ifdef IW_WIRELESS_SPY /* defined in iw_handler.h */
776 /* If spy monitoring on */
777 if (iface->spy_data.spy_number > 0) {
778 struct iw_quality wstats;
779 wstats.level = rx_stats->signal;
780 wstats.noise = rx_stats->noise;
c28df16e
JT		 781 wstats.updated = IW_QUAL_LEVEL_UPDATED | IW_QUAL_NOISE_UPDATED
782 | IW_QUAL_QUAL_INVALID | IW_QUAL_DBM;
ff1d2767
JM		 783 /* Update spy records */
784 wireless_spy_update(dev, hdr->addr2, &wstats);
785 }
786#endif /* IW_WIRELESS_SPY */
787 hostap_update_rx_stats(local->ap, hdr, rx_stats);
788
789 if (local->iw_mode == IW_MODE_MONITOR) {
790 monitor_rx(dev, skb, rx_stats);
791 return;
792 }
793
794 if (local->host_decrypt) {
795 int idx = 0;
796 if (skb->len >= hdrlen + 3)
797 idx = skb->data[hdrlen + 3] >> 6;
798 crypt = local->crypt[idx];
799 sta = NULL;
800
801 /* Use station specific key to override default keys if the
802 * receiver address is a unicast address ("individual RA"). If
803 * bcrx_sta_key parameter is set, station specific key is used
804 * even with broad/multicast targets (this is against IEEE
805 * 802.11, but makes it easier to use different keys with
806 * stations that do not support WEP key mapping). */
807
808 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
809 (void) hostap_handle_sta_crypto(local, hdr, &crypt,
810 &sta);
811
812 /* allow NULL decrypt to indicate an station specific override
813 * for default encryption */
814 if (crypt && (crypt->ops == NULL ||
815 crypt->ops->decrypt_mpdu == NULL))
816 crypt = NULL;
817
831a179f 818 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
ff1d2767
JM		 819#if 0
820 /* This seems to be triggered by some (multicast?)
821 * frames from other than current BSS, so just drop the
822 * frames silently instead of filling system log with
823 * these reports. */
824 printk(KERN_DEBUG "%s: WEP decryption failed (not set)"
21f644f3
DM		 825 " (SA=" MAC_FMT ")\n",
826 local->dev->name,
827 hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
828 hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
ff1d2767
JM		 829#endif
830 local->comm_tallies.rx_discards_wep_undecryptable++;
831 goto rx_dropped;
832 }
833 }
834
4339d328
JM		 835 if (type != IEEE80211_FTYPE_DATA) {
836 if (type == IEEE80211_FTYPE_MGMT &&
837 stype == IEEE80211_STYPE_AUTH &&
831a179f 838 fc & IEEE80211_FCTL_PROTECTED && local->host_decrypt &&
ff1d2767
JM		 839 (keyidx = hostap_rx_frame_decrypt(local, skb, crypt)) < 0)
840 {
841 printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
21f644f3
DM		 842 "from " MAC_FMT "\n", dev->name,
843 hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
844 hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
ff1d2767
JM		 845 /* TODO: could inform hostapd about this so that it
846 * could send auth failure report */
847 goto rx_dropped;
848 }
849
850 if (hostap_rx_frame_mgmt(local, skb, rx_stats, type, stype))
851 goto rx_dropped;
852 else
853 goto rx_exit;
854 }
855
856 /* Data frame - extract src/dst addresses */
857 if (skb->len < IEEE80211_DATA_HDR3_LEN)
858 goto rx_dropped;
859
b2f4a2e3
JM		 860 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
861 case IEEE80211_FCTL_FROMDS:
ff1d2767
JM		 862 memcpy(dst, hdr->addr1, ETH_ALEN);
863 memcpy(src, hdr->addr3, ETH_ALEN);
864 break;
b2f4a2e3 865 case IEEE80211_FCTL_TODS:
ff1d2767
JM		 866 memcpy(dst, hdr->addr3, ETH_ALEN);
867 memcpy(src, hdr->addr2, ETH_ALEN);
868 break;
b2f4a2e3 869 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
ff1d2767
JM		 870 if (skb->len < IEEE80211_DATA_HDR4_LEN)
871 goto rx_dropped;
872 memcpy(dst, hdr->addr3, ETH_ALEN);
873 memcpy(src, hdr->addr4, ETH_ALEN);
874 break;
875 case 0:
876 memcpy(dst, hdr->addr1, ETH_ALEN);
877 memcpy(src, hdr->addr2, ETH_ALEN);
878 break;
879 }
880
881 if (hostap_rx_frame_wds(local, hdr, fc, &wds))
882 goto rx_dropped;
883 if (wds) {
884 skb->dev = dev = wds;
885 stats = hostap_get_stats(dev);
886 }
887
888 if (local->iw_mode == IW_MODE_MASTER && !wds &&
b2f4a2e3
JM		 889 (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
890 IEEE80211_FCTL_FROMDS &&
ff1d2767
JM		 891 local->stadev &&
892 memcmp(hdr->addr2, local->assoc_ap_addr, ETH_ALEN) == 0) {
893 /* Frame from BSSID of the AP for which we are a client */
894 skb->dev = dev = local->stadev;
895 stats = hostap_get_stats(dev);
896 from_assoc_ap = 1;
897 }
898
899 dev->last_rx = jiffies;
900
901 if ((local->iw_mode == IW_MODE_MASTER ||
902 local->iw_mode == IW_MODE_REPEAT) &&
903 !from_assoc_ap) {
904 switch (hostap_handle_sta_rx(local, dev, skb, rx_stats,
905 wds != NULL)) {
906 case AP_RX_CONTINUE_NOT_AUTHORIZED:
907 frame_authorized = 0;
908 break;
909 case AP_RX_CONTINUE:
910 frame_authorized = 1;
911 break;
912 case AP_RX_DROP:
913 goto rx_dropped;
914 case AP_RX_EXIT:
915 goto rx_exit;
916 }
917 }
918
919 /* Nullfunc frames may have PS-bit set, so they must be passed to
920 * hostap_handle_sta_rx() before being dropped here. */
4339d328
JM		 921 if (stype != IEEE80211_STYPE_DATA &&
922 stype != IEEE80211_STYPE_DATA_CFACK &&
923 stype != IEEE80211_STYPE_DATA_CFPOLL &&
924 stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
925 if (stype != IEEE80211_STYPE_NULLFUNC)
ff1d2767
JM		 926 printk(KERN_DEBUG "%s: RX: dropped data frame "
927 "with no data (type=0x%02x, subtype=0x%02x)\n",
4339d328 928 dev->name, type >> 2, stype >> 4);
ff1d2767
JM		 929 goto rx_dropped;
930 }
931
932 /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
933
831a179f 934 if (local->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
ff1d2767
JM		 935 (keyidx = hostap_rx_frame_decrypt(local, skb, crypt)) < 0)
936 goto rx_dropped;
d041674d 937 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 938
939 /* skb: hdr + (possibly fragmented) plaintext payload */
940
831a179f 941 if (local->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
b2f4a2e3 942 (frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
ff1d2767
JM		 943 int flen;
944 struct sk_buff *frag_skb =
945 prism2_frag_cache_get(local, hdr);
946 if (!frag_skb) {
947 printk(KERN_DEBUG "%s: Rx cannot get skb from "
948 "fragment cache (morefrag=%d seq=%u frag=%u)\n",
b2f4a2e3 949 dev->name, (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
ebed67d2 950 WLAN_GET_SEQ_SEQ(sc) >> 4, frag);
ff1d2767
JM		 951 goto rx_dropped;
952 }
953
954 flen = skb->len;
955 if (frag != 0)
956 flen -= hdrlen;
957
4305b541 958 if (frag_skb->tail + flen > frag_skb->end) {
ff1d2767
JM		 959 printk(KERN_WARNING "%s: host decrypted and "
960 "reassembled frame did not fit skb\n",
961 dev->name);
962 prism2_frag_cache_invalidate(local, hdr);
963 goto rx_dropped;
964 }
965
966 if (frag == 0) {
967 /* copy first fragment (including full headers) into
968 * beginning of the fragment cache skb */
d626f62b
ACM		 969 skb_copy_from_linear_data(skb, skb_put(frag_skb, flen),
970 flen);
ff1d2767
JM		 971 } else {
972 /* append frame payload to the end of the fragment
973 * cache skb */
d626f62b
ACM		 974 skb_copy_from_linear_data_offset(skb, hdrlen,
975 skb_put(frag_skb,
976 flen), flen);
ff1d2767
JM		 977 }
978 dev_kfree_skb(skb);
979 skb = NULL;
980
b2f4a2e3 981 if (fc & IEEE80211_FCTL_MOREFRAGS) {
ff1d2767
JM		 982 /* more fragments expected - leave the skb in fragment
983 * cache for now; it will be delivered to upper layers
984 * after all fragments have been received */
985 goto rx_exit;
986 }
987
988 /* this was the last fragment and the frame will be
989 * delivered, so remove skb from fragment cache */
990 skb = frag_skb;
d041674d 991 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 992 prism2_frag_cache_invalidate(local, hdr);
993 }
994
995 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
996 * encrypted/authenticated */
997
831a179f 998 if (local->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
ff1d2767
JM		 999 hostap_rx_frame_decrypt_msdu(local, skb, keyidx, crypt))
1000 goto rx_dropped;
1001
d041674d 1002 hdr = (struct ieee80211_hdr_4addr *) skb->data;
831a179f 1003 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !local->open_wep) {
ff1d2767
JM		 1004 if (local->ieee_802_1x &&
1005 hostap_is_eapol_frame(local, skb)) {
1006 /* pass unencrypted EAPOL frames even if encryption is
1007 * configured */
1008 PDEBUG(DEBUG_EXTRA2, "%s: RX: IEEE 802.1X - passing "
1009 "unencrypted EAPOL frame\n", local->dev->name);
1010 } else {
1011 printk(KERN_DEBUG "%s: encryption configured, but RX "
21f644f3
DM		 1012 "frame not encrypted (SA=" MAC_FMT ")\n",
1013 local->dev->name,
1014 hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
1015 hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
ff1d2767
JM		 1016 goto rx_dropped;
1017 }
1018 }
1019
831a179f 1020 if (local->drop_unencrypted && !(fc & IEEE80211_FCTL_PROTECTED) &&
ff1d2767
JM		 1021 !hostap_is_eapol_frame(local, skb)) {
1022 if (net_ratelimit()) {
1023 printk(KERN_DEBUG "%s: dropped unencrypted RX data "
21f644f3
DM		 1024 "frame from " MAC_FMT " (drop_unencrypted=1)\n",
1025 dev->name,
1026 hdr->addr2[0], hdr->addr2[1], hdr->addr2[2],
1027 hdr->addr2[3], hdr->addr2[4], hdr->addr2[5]);
ff1d2767
JM		 1028 }
1029 goto rx_dropped;
1030 }
1031
1032 /* skb: hdr + (possible reassembled) full plaintext payload */
1033
1034 payload = skb->data + hdrlen;
1035 ethertype = (payload[6] << 8) | payload[7];
1036
1037 /* If IEEE 802.1X is used, check whether the port is authorized to send
1038 * the received frame. */
1039 if (local->ieee_802_1x && local->iw_mode == IW_MODE_MASTER) {
1040 if (ethertype == ETH_P_PAE) {
1041 PDEBUG(DEBUG_EXTRA2, "%s: RX: IEEE 802.1X frame\n",
1042 dev->name);
1043 if (local->hostapd && local->apdev) {
1044 /* Send IEEE 802.1X frames to the user
1045 * space daemon for processing */
1046 prism2_rx_80211(local->apdev, skb, rx_stats,
1047 PRISM2_RX_MGMT);
1048 local->apdevstats.rx_packets++;
1049 local->apdevstats.rx_bytes += skb->len;
1050 goto rx_exit;
1051 }
1052 } else if (!frame_authorized) {
1053 printk(KERN_DEBUG "%s: dropped frame from "
1054 "unauthorized port (IEEE 802.1X): "
1055 "ethertype=0x%04x\n",
1056 dev->name, ethertype);
1057 goto rx_dropped;
1058 }
1059 }
1060
1061 /* convert hdr + possible LLC headers into Ethernet header */
1062 if (skb->len - hdrlen >= 8 &&
1063 ((memcmp(payload, rfc1042_header, 6) == 0 &&
1064 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1065 memcmp(payload, bridge_tunnel_header, 6) == 0)) {
1066 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1067 * replace EtherType */
1068 skb_pull(skb, hdrlen + 6);
1069 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1070 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1071 } else {
8a9faf3c 1072 __be16 len;
ff1d2767
JM		 1073 /* Leave Ethernet header part of hdr and full payload */
1074 skb_pull(skb, hdrlen);
1075 len = htons(skb->len);
1076 memcpy(skb_push(skb, 2), &len, 2);
1077 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
1078 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
1079 }
1080
b2f4a2e3
JM		 1081 if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
1082 IEEE80211_FCTL_TODS) &&
ff1d2767
JM		 1083 skb->len >= ETH_HLEN + ETH_ALEN) {
1084 /* Non-standard frame: get addr4 from its bogus location after
1085 * the payload */
d626f62b
ACM		 1086 skb_copy_from_linear_data_offset(skb, skb->len - ETH_ALEN,
1087 skb->data + ETH_ALEN,
1088 ETH_ALEN);
ff1d2767
JM		 1089 skb_trim(skb, skb->len - ETH_ALEN);
1090 }
1091
1092 stats->rx_packets++;
1093 stats->rx_bytes += skb->len;
1094
1095 if (local->iw_mode == IW_MODE_MASTER && !wds &&
1096 local->ap->bridge_packets) {
1097 if (dst[0] & 0x01) {
1098 /* copy multicast frame both to the higher layers and
1099 * to the wireless media */
1100 local->ap->bridged_multicast++;
1101 skb2 = skb_clone(skb, GFP_ATOMIC);
1102 if (skb2 == NULL)
1103 printk(KERN_DEBUG "%s: skb_clone failed for "
1104 "multicast frame\n", dev->name);
1105 } else if (hostap_is_sta_authorized(local->ap, dst)) {
1106 /* send frame directly to the associated STA using
1107 * wireless media and not passing to higher layers */
1108 local->ap->bridged_unicast++;
1109 skb2 = skb;
1110 skb = NULL;
1111 }
1112 }
1113
1114 if (skb2 != NULL) {
1115 /* send to wireless media */
459a98ed 1116 skb2->dev = dev;
ff1d2767 1117 skb2->protocol = __constant_htons(ETH_P_802_3);
459a98ed 1118 skb_reset_mac_header(skb2);
c1d2bbe1 1119 skb_reset_network_header(skb2);
b0e380b1 1120 /* skb2->network_header += ETH_HLEN; */
ff1d2767
JM		 1121 dev_queue_xmit(skb2);
1122 }
1123
1124 if (skb) {
1125 skb->protocol = eth_type_trans(skb, dev);
1126 memset(skb->cb, 0, sizeof(skb->cb));
ff1d2767
JM		 1127 netif_rx(skb);
1128 }
1129
1130 rx_exit:
1131 if (sta)
1132 hostap_handle_sta_release(sta);
1133 return;
1134
1135 rx_dropped:
1136 dev_kfree_skb(skb);
1137
1138 stats->rx_dropped++;
1139 goto rx_exit;
1140}
1141
1142
1143EXPORT_SYMBOL(hostap_80211_rx);
Linux 6.x block layer and io_uring tree(s)