1 void hostap_dump_tx_80211(const char *name, struct sk_buff *skb)
3 struct ieee80211_hdr *hdr;
6 hdr = (struct ieee80211_hdr *) skb->data;
8 printk(KERN_DEBUG "%s: TX len=%d jiffies=%ld\n",
9 name, skb->len, jiffies);
14 fc = le16_to_cpu(hdr->frame_ctl);
15 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d)%s%s",
16 fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
17 fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
18 fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
20 if (skb->len < IEEE80211_DATA_HDR3_LEN) {
25 printk(" dur=0x%04x seq=0x%04x\n", le16_to_cpu(hdr->duration_id),
26 le16_to_cpu(hdr->seq_ctl));
28 printk(KERN_DEBUG " A1=" MACSTR " A2=" MACSTR " A3=" MACSTR,
29 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2), MAC2STR(hdr->addr3));
31 printk(" A4=" MACSTR, MAC2STR(hdr->addr4));
36 /* hard_start_xmit function for data interfaces (wlan#, wlan#wds#, wlan#sta)
37 * Convert Ethernet header into a suitable IEEE 802.11 header depending on
38 * device configuration. */
39 int hostap_data_start_xmit(struct sk_buff *skb, struct net_device *dev)
41 struct hostap_interface *iface;
43 int need_headroom, need_tailroom = 0;
44 struct ieee80211_hdr hdr;
45 u16 fc, ethertype = 0;
47 WDS_NO = 0, WDS_OWN_FRAME, WDS_COMPLIANT_FRAME
50 int hdr_len, encaps_len, skip_header_bytes;
52 struct hostap_skb_tx_data *meta;
54 iface = netdev_priv(dev);
57 if (skb->len < ETH_HLEN) {
58 printk(KERN_DEBUG "%s: hostap_data_start_xmit: short skb "
59 "(len=%d)\n", dev->name, skb->len);
64 if (local->ddev != dev) {
65 use_wds = (local->iw_mode == IW_MODE_MASTER &&
66 !(local->wds_type & HOSTAP_WDS_STANDARD_FRAME)) ?
67 WDS_OWN_FRAME : WDS_COMPLIANT_FRAME;
68 if (dev == local->stadev) {
71 } else if (dev == local->apdev) {
72 printk(KERN_DEBUG "%s: prism2_tx: trying to use "
73 "AP device with Ethernet net dev\n", dev->name);
78 if (local->iw_mode == IW_MODE_REPEAT) {
79 printk(KERN_DEBUG "%s: prism2_tx: trying to use "
80 "non-WDS link in Repeater mode\n", dev->name);
83 } else if (local->iw_mode == IW_MODE_INFRA &&
84 (local->wds_type & HOSTAP_WDS_AP_CLIENT) &&
85 memcmp(skb->data + ETH_ALEN, dev->dev_addr,
87 /* AP client mode: send frames with foreign src addr
88 * using 4-addr WDS frames */
89 use_wds = WDS_COMPLIANT_FRAME;
93 /* Incoming skb->data: dst_addr[6], src_addr[6], proto[2], payload
95 * Prism2 TX frame with 802.11 header:
96 * txdesc (address order depending on used mode; includes dst_addr and
97 * src_addr), possible encapsulation (RFC1042/Bridge-Tunnel;
98 * proto[2], payload {, possible addr4[6]} */
100 ethertype = (skb->data[12] << 8) | skb->data[13];
102 memset(&hdr, 0, sizeof(hdr));
104 /* Length of data after IEEE 802.11 header */
107 skip_header_bytes = ETH_HLEN;
108 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
109 encaps_data = bridge_tunnel_header;
110 encaps_len = sizeof(bridge_tunnel_header);
111 skip_header_bytes -= 2;
112 } else if (ethertype >= 0x600) {
113 encaps_data = rfc1042_header;
114 encaps_len = sizeof(rfc1042_header);
115 skip_header_bytes -= 2;
118 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA;
119 hdr_len = IEEE80211_DATA_HDR3_LEN;
121 if (use_wds != WDS_NO) {
122 /* Note! Prism2 station firmware has problems with sending real
123 * 802.11 frames with four addresses; until these problems can
124 * be fixed or worked around, 4-addr frames needed for WDS are
125 * using incompatible format: FromDS flag is not set and the
126 * fourth address is added after the frame payload; it is
127 * assumed, that the receiving station knows how to handle this
130 if (use_wds == WDS_COMPLIANT_FRAME) {
131 fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS;
132 /* From&To DS: Addr1 = RA, Addr2 = TA, Addr3 = DA,
134 memcpy(&hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
137 /* bogus 4-addr format to workaround Prism2 station
139 fc |= IEEE80211_FCTL_TODS;
140 /* From DS: Addr1 = DA (used as RA),
141 * Addr2 = BSSID (used as TA), Addr3 = SA (used as DA),
144 /* SA from skb->data + ETH_ALEN will be added after
145 * frame payload; use hdr.addr4 as a temporary buffer
147 memcpy(&hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
148 need_tailroom += ETH_ALEN;
151 /* send broadcast and multicast frames to broadcast RA, if
152 * configured; otherwise, use unicast RA of the WDS link */
153 if ((local->wds_type & HOSTAP_WDS_BROADCAST_RA) &&
155 memset(&hdr.addr1, 0xff, ETH_ALEN);
156 else if (iface->type == HOSTAP_INTERFACE_WDS)
157 memcpy(&hdr.addr1, iface->u.wds.remote_addr,
160 memcpy(&hdr.addr1, local->bssid, ETH_ALEN);
161 memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN);
162 memcpy(&hdr.addr3, skb->data, ETH_ALEN);
163 } else if (local->iw_mode == IW_MODE_MASTER && !to_assoc_ap) {
164 fc |= IEEE80211_FCTL_FROMDS;
165 /* From DS: Addr1 = DA, Addr2 = BSSID, Addr3 = SA */
166 memcpy(&hdr.addr1, skb->data, ETH_ALEN);
167 memcpy(&hdr.addr2, dev->dev_addr, ETH_ALEN);
168 memcpy(&hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
169 } else if (local->iw_mode == IW_MODE_INFRA || to_assoc_ap) {
170 fc |= IEEE80211_FCTL_TODS;
171 /* To DS: Addr1 = BSSID, Addr2 = SA, Addr3 = DA */
172 memcpy(&hdr.addr1, to_assoc_ap ?
173 local->assoc_ap_addr : local->bssid, ETH_ALEN);
174 memcpy(&hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
175 memcpy(&hdr.addr3, skb->data, ETH_ALEN);
176 } else if (local->iw_mode == IW_MODE_ADHOC) {
177 /* not From/To DS: Addr1 = DA, Addr2 = SA, Addr3 = BSSID */
178 memcpy(&hdr.addr1, skb->data, ETH_ALEN);
179 memcpy(&hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
180 memcpy(&hdr.addr3, local->bssid, ETH_ALEN);
183 hdr.frame_ctl = cpu_to_le16(fc);
185 skb_pull(skb, skip_header_bytes);
186 need_headroom = local->func->need_tx_headroom + hdr_len + encaps_len;
187 if (skb_tailroom(skb) < need_tailroom) {
188 skb = skb_unshare(skb, GFP_ATOMIC);
190 iface->stats.tx_dropped++;
193 if (pskb_expand_head(skb, need_headroom, need_tailroom,
196 iface->stats.tx_dropped++;
199 } else if (skb_headroom(skb) < need_headroom) {
200 struct sk_buff *tmp = skb;
201 skb = skb_realloc_headroom(skb, need_headroom);
204 iface->stats.tx_dropped++;
208 skb = skb_unshare(skb, GFP_ATOMIC);
210 iface->stats.tx_dropped++;
216 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
217 memcpy(skb_push(skb, hdr_len), &hdr, hdr_len);
218 if (use_wds == WDS_OWN_FRAME) {
219 memcpy(skb_put(skb, ETH_ALEN), &hdr.addr4, ETH_ALEN);
222 iface->stats.tx_packets++;
223 iface->stats.tx_bytes += skb->len;
225 skb->mac.raw = skb->data;
226 meta = (struct hostap_skb_tx_data *) skb->cb;
227 memset(meta, 0, sizeof(*meta));
228 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
230 meta->flags |= HOSTAP_TX_FLAGS_WDS;
231 meta->ethertype = ethertype;
234 /* Send IEEE 802.11 encapsulated frame using the master radio device */
235 skb->dev = local->dev;
241 /* hard_start_xmit function for hostapd wlan#ap interfaces */
242 int hostap_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev)
244 struct hostap_interface *iface;
246 struct hostap_skb_tx_data *meta;
247 struct ieee80211_hdr *hdr;
250 iface = netdev_priv(dev);
251 local = iface->local;
254 printk(KERN_DEBUG "%s: hostap_mgmt_start_xmit: short skb "
255 "(len=%d)\n", dev->name, skb->len);
260 iface->stats.tx_packets++;
261 iface->stats.tx_bytes += skb->len;
263 meta = (struct hostap_skb_tx_data *) skb->cb;
264 memset(meta, 0, sizeof(*meta));
265 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
268 if (skb->len >= IEEE80211_DATA_HDR3_LEN + sizeof(rfc1042_header) + 2) {
269 hdr = (struct ieee80211_hdr *) skb->data;
270 fc = le16_to_cpu(hdr->frame_ctl);
271 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
272 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_DATA) {
273 u8 *pos = &skb->data[IEEE80211_DATA_HDR3_LEN +
274 sizeof(rfc1042_header)];
275 meta->ethertype = (pos[0] << 8) | pos[1];
279 /* Send IEEE 802.11 encapsulated frame using the master radio device */
280 skb->dev = local->dev;
286 /* Called only from software IRQ */
287 struct sk_buff * hostap_tx_encrypt(struct sk_buff *skb,
288 struct ieee80211_crypt_data *crypt)
290 struct hostap_interface *iface;
292 struct ieee80211_hdr *hdr;
296 iface = netdev_priv(skb->dev);
297 local = iface->local;
299 if (skb->len < IEEE80211_DATA_HDR3_LEN) {
304 if (local->tkip_countermeasures &&
305 crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) {
306 hdr = (struct ieee80211_hdr *) skb->data;
307 if (net_ratelimit()) {
308 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
309 "TX packet to " MACSTR "\n",
310 local->dev->name, MAC2STR(hdr->addr1));
316 skb = skb_unshare(skb, GFP_ATOMIC);
320 if ((skb_headroom(skb) < crypt->ops->extra_prefix_len ||
321 skb_tailroom(skb) < crypt->ops->extra_postfix_len) &&
322 pskb_expand_head(skb, crypt->ops->extra_prefix_len,
323 crypt->ops->extra_postfix_len, GFP_ATOMIC)) {
328 hdr = (struct ieee80211_hdr *) skb->data;
329 fc = le16_to_cpu(hdr->frame_ctl);
330 hdr_len = hostap_80211_get_hdrlen(fc);
332 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so
333 * call both MSDU and MPDU encryption functions from here. */
334 atomic_inc(&crypt->refcnt);
336 if (crypt->ops->encrypt_msdu)
337 res = crypt->ops->encrypt_msdu(skb, hdr_len, crypt->priv);
338 if (res == 0 && crypt->ops->encrypt_mpdu)
339 res = crypt->ops->encrypt_mpdu(skb, hdr_len, crypt->priv);
340 atomic_dec(&crypt->refcnt);
350 /* hard_start_xmit function for master radio interface wifi#.
351 * AP processing (TX rate control, power save buffering, etc.).
352 * Use hardware TX function to send the frame. */
353 int hostap_master_start_xmit(struct sk_buff *skb, struct net_device *dev)
355 struct hostap_interface *iface;
359 struct hostap_tx_data tx;
361 struct hostap_skb_tx_data *meta;
363 struct ieee80211_hdr *hdr;
365 iface = netdev_priv(dev);
366 local = iface->local;
371 meta = (struct hostap_skb_tx_data *) skb->cb;
372 if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) {
373 printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, "
374 "expected 0x%08x)\n",
375 dev->name, meta->magic, HOSTAP_SKB_TX_DATA_MAGIC);
377 iface->stats.tx_dropped++;
381 if (local->host_encrypt) {
382 /* Set crypt to default algorithm and key; will be replaced in
383 * AP code if STA has own alg/key */
384 tx.crypt = local->crypt[local->tx_keyidx];
392 printk(KERN_DEBUG "%s: hostap_master_start_xmit: short skb "
393 "(len=%d)\n", dev->name, skb->len);
395 iface->stats.tx_dropped++;
400 * Wi-Fi 802.11b test plan suggests that AP should ignore power save
401 * bit in authentication and (re)association frames and assume tha
402 * STA remains awake for the response. */
403 tx_ret = hostap_handle_sta_tx(local, &tx);
405 meta = (struct hostap_skb_tx_data *) skb->cb;
406 hdr = (struct ieee80211_hdr *) skb->data;
407 fc = le16_to_cpu(hdr->frame_ctl);
411 case AP_TX_CONTINUE_NOT_AUTHORIZED:
412 if (local->ieee_802_1x &&
413 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
414 meta->ethertype != ETH_P_PAE &&
415 !(meta->flags & HOSTAP_TX_FLAGS_WDS)) {
416 printk(KERN_DEBUG "%s: dropped frame to unauthorized "
417 "port (IEEE 802.1X): ethertype=0x%04x\n",
418 dev->name, meta->ethertype);
419 hostap_dump_tx_80211(dev->name, skb);
421 ret = 0; /* drop packet */
422 iface->stats.tx_dropped++;
427 ret = 0; /* drop packet */
428 iface->stats.tx_dropped++;
433 /* do not free skb here, it will be freed when the
434 * buffered frame is sent/timed out */
439 /* Request TX callback if protocol version is 2 in 802.11 header;
440 * this version 2 is a special case used between hostapd and kernel
442 if (((fc & IEEE80211_FCTL_VERS) == BIT(1)) &&
443 local->ap && local->ap->tx_callback_idx && meta->tx_cb_idx == 0) {
444 meta->tx_cb_idx = local->ap->tx_callback_idx;
446 /* remove special version from the frame header */
447 fc &= ~IEEE80211_FCTL_VERS;
448 hdr->frame_ctl = cpu_to_le16(fc);
451 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_DATA) {
456 if (local->ieee_802_1x && meta->ethertype == ETH_P_PAE && tx.crypt &&
457 !(fc & IEEE80211_FCTL_VERS)) {
459 PDEBUG(DEBUG_EXTRA2, "%s: TX: IEEE 802.1X - passing "
460 "unencrypted EAPOL frame\n", dev->name);
461 tx.crypt = NULL; /* no encryption for IEEE 802.1X frames */
464 if (tx.crypt && (!tx.crypt->ops || !tx.crypt->ops->encrypt_mpdu))
466 else if ((tx.crypt || local->crypt[local->tx_keyidx]) && !no_encrypt) {
467 /* Add ISWEP flag both for firmware and host based encryption
469 fc |= IEEE80211_FCTL_WEP;
470 hdr->frame_ctl = cpu_to_le16(fc);
471 } else if (local->drop_unencrypted &&
472 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA &&
473 meta->ethertype != ETH_P_PAE) {
474 if (net_ratelimit()) {
475 printk(KERN_DEBUG "%s: dropped unencrypted TX data "
476 "frame (drop_unencrypted=1)\n", dev->name);
478 iface->stats.tx_dropped++;
484 skb = hostap_tx_encrypt(skb, tx.crypt);
486 printk(KERN_DEBUG "%s: TX - encryption failed\n",
491 meta = (struct hostap_skb_tx_data *) skb->cb;
492 if (meta->magic != HOSTAP_SKB_TX_DATA_MAGIC) {
493 printk(KERN_DEBUG "%s: invalid skb->cb magic (0x%08x, "
494 "expected 0x%08x) after hostap_tx_encrypt\n",
495 dev->name, meta->magic,
496 HOSTAP_SKB_TX_DATA_MAGIC);
498 iface->stats.tx_dropped++;
503 if (local->func->tx == NULL || local->func->tx(skb, dev)) {
505 iface->stats.tx_dropped++;
508 iface->stats.tx_packets++;
509 iface->stats.tx_bytes += skb->len;
517 hostap_handle_sta_release(tx.sta_ptr);
522 EXPORT_SYMBOL(hostap_dump_tx_80211);
523 EXPORT_SYMBOL(hostap_tx_encrypt);
524 EXPORT_SYMBOL(hostap_master_start_xmit);