2 * Wireless utility functions
4 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 #include <linux/export.h>
8 #include <linux/bitops.h>
9 #include <linux/etherdevice.h>
10 #include <linux/slab.h>
11 #include <net/cfg80211.h>
13 #include <net/dsfield.h>
14 #include <linux/if_vlan.h>
15 #include <linux/mpls.h>
20 struct ieee80211_rate *
21 ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
22 u32 basic_rates, int bitrate)
24 struct ieee80211_rate *result = &sband->bitrates[0];
27 for (i = 0; i < sband->n_bitrates; i++) {
28 if (!(basic_rates & BIT(i)))
30 if (sband->bitrates[i].bitrate > bitrate)
32 result = &sband->bitrates[i];
37 EXPORT_SYMBOL(ieee80211_get_response_rate);
39 u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
40 enum nl80211_bss_scan_width scan_width)
42 struct ieee80211_rate *bitrates;
43 u32 mandatory_rates = 0;
44 enum ieee80211_rate_flags mandatory_flag;
50 if (sband->band == IEEE80211_BAND_2GHZ) {
51 if (scan_width == NL80211_BSS_CHAN_WIDTH_5 ||
52 scan_width == NL80211_BSS_CHAN_WIDTH_10)
53 mandatory_flag = IEEE80211_RATE_MANDATORY_G;
55 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
57 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
60 bitrates = sband->bitrates;
61 for (i = 0; i < sband->n_bitrates; i++)
62 if (bitrates[i].flags & mandatory_flag)
63 mandatory_rates |= BIT(i);
64 return mandatory_rates;
66 EXPORT_SYMBOL(ieee80211_mandatory_rates);
68 int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
70 /* see 802.11 17.3.8.3.2 and Annex J
71 * there are overlapping channel numbers in 5GHz and 2GHz bands */
73 return 0; /* not supported */
75 case IEEE80211_BAND_2GHZ:
79 return 2407 + chan * 5;
81 case IEEE80211_BAND_5GHZ:
82 if (chan >= 182 && chan <= 196)
83 return 4000 + chan * 5;
85 return 5000 + chan * 5;
87 case IEEE80211_BAND_60GHZ:
89 return 56160 + chan * 2160;
94 return 0; /* not supported */
96 EXPORT_SYMBOL(ieee80211_channel_to_frequency);
98 int ieee80211_frequency_to_channel(int freq)
100 /* see 802.11 17.3.8.3.2 and Annex J */
103 else if (freq < 2484)
104 return (freq - 2407) / 5;
105 else if (freq >= 4910 && freq <= 4980)
106 return (freq - 4000) / 5;
107 else if (freq <= 45000) /* DMG band lower limit */
108 return (freq - 5000) / 5;
109 else if (freq >= 58320 && freq <= 64800)
110 return (freq - 56160) / 2160;
114 EXPORT_SYMBOL(ieee80211_frequency_to_channel);
116 struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
119 enum ieee80211_band band;
120 struct ieee80211_supported_band *sband;
123 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
124 sband = wiphy->bands[band];
129 for (i = 0; i < sband->n_channels; i++) {
130 if (sband->channels[i].center_freq == freq)
131 return &sband->channels[i];
137 EXPORT_SYMBOL(__ieee80211_get_channel);
139 static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
140 enum ieee80211_band band)
145 case IEEE80211_BAND_5GHZ:
147 for (i = 0; i < sband->n_bitrates; i++) {
148 if (sband->bitrates[i].bitrate == 60 ||
149 sband->bitrates[i].bitrate == 120 ||
150 sband->bitrates[i].bitrate == 240) {
151 sband->bitrates[i].flags |=
152 IEEE80211_RATE_MANDATORY_A;
158 case IEEE80211_BAND_2GHZ:
160 for (i = 0; i < sband->n_bitrates; i++) {
161 if (sband->bitrates[i].bitrate == 10) {
162 sband->bitrates[i].flags |=
163 IEEE80211_RATE_MANDATORY_B |
164 IEEE80211_RATE_MANDATORY_G;
168 if (sband->bitrates[i].bitrate == 20 ||
169 sband->bitrates[i].bitrate == 55 ||
170 sband->bitrates[i].bitrate == 110 ||
171 sband->bitrates[i].bitrate == 60 ||
172 sband->bitrates[i].bitrate == 120 ||
173 sband->bitrates[i].bitrate == 240) {
174 sband->bitrates[i].flags |=
175 IEEE80211_RATE_MANDATORY_G;
179 if (sband->bitrates[i].bitrate != 10 &&
180 sband->bitrates[i].bitrate != 20 &&
181 sband->bitrates[i].bitrate != 55 &&
182 sband->bitrates[i].bitrate != 110)
183 sband->bitrates[i].flags |=
184 IEEE80211_RATE_ERP_G;
186 WARN_ON(want != 0 && want != 3 && want != 6);
188 case IEEE80211_BAND_60GHZ:
189 /* check for mandatory HT MCS 1..4 */
190 WARN_ON(!sband->ht_cap.ht_supported);
191 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
193 case IEEE80211_NUM_BANDS:
199 void ieee80211_set_bitrate_flags(struct wiphy *wiphy)
201 enum ieee80211_band band;
203 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
204 if (wiphy->bands[band])
205 set_mandatory_flags_band(wiphy->bands[band], band);
208 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher)
211 for (i = 0; i < wiphy->n_cipher_suites; i++)
212 if (cipher == wiphy->cipher_suites[i])
217 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
218 struct key_params *params, int key_idx,
219 bool pairwise, const u8 *mac_addr)
224 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
227 if (pairwise && !mac_addr)
230 switch (params->cipher) {
231 case WLAN_CIPHER_SUITE_TKIP:
232 case WLAN_CIPHER_SUITE_CCMP:
233 case WLAN_CIPHER_SUITE_CCMP_256:
234 case WLAN_CIPHER_SUITE_GCMP:
235 case WLAN_CIPHER_SUITE_GCMP_256:
236 /* Disallow pairwise keys with non-zero index unless it's WEP
237 * or a vendor specific cipher (because current deployments use
238 * pairwise WEP keys with non-zero indices and for vendor
239 * specific ciphers this should be validated in the driver or
240 * hardware level - but 802.11i clearly specifies to use zero)
242 if (pairwise && key_idx)
245 case WLAN_CIPHER_SUITE_AES_CMAC:
246 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
247 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
248 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
249 /* Disallow BIP (group-only) cipher as pairwise cipher */
257 switch (params->cipher) {
258 case WLAN_CIPHER_SUITE_WEP40:
259 if (params->key_len != WLAN_KEY_LEN_WEP40)
262 case WLAN_CIPHER_SUITE_TKIP:
263 if (params->key_len != WLAN_KEY_LEN_TKIP)
266 case WLAN_CIPHER_SUITE_CCMP:
267 if (params->key_len != WLAN_KEY_LEN_CCMP)
270 case WLAN_CIPHER_SUITE_CCMP_256:
271 if (params->key_len != WLAN_KEY_LEN_CCMP_256)
274 case WLAN_CIPHER_SUITE_GCMP:
275 if (params->key_len != WLAN_KEY_LEN_GCMP)
278 case WLAN_CIPHER_SUITE_GCMP_256:
279 if (params->key_len != WLAN_KEY_LEN_GCMP_256)
282 case WLAN_CIPHER_SUITE_WEP104:
283 if (params->key_len != WLAN_KEY_LEN_WEP104)
286 case WLAN_CIPHER_SUITE_AES_CMAC:
287 if (params->key_len != WLAN_KEY_LEN_AES_CMAC)
290 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
291 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256)
294 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
295 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128)
298 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
299 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256)
304 * We don't know anything about this algorithm,
305 * allow using it -- but the driver must check
306 * all parameters! We still check below whether
307 * or not the driver supports this algorithm,
314 switch (params->cipher) {
315 case WLAN_CIPHER_SUITE_WEP40:
316 case WLAN_CIPHER_SUITE_WEP104:
317 /* These ciphers do not use key sequence */
319 case WLAN_CIPHER_SUITE_TKIP:
320 case WLAN_CIPHER_SUITE_CCMP:
321 case WLAN_CIPHER_SUITE_CCMP_256:
322 case WLAN_CIPHER_SUITE_GCMP:
323 case WLAN_CIPHER_SUITE_GCMP_256:
324 case WLAN_CIPHER_SUITE_AES_CMAC:
325 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
326 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
327 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
328 if (params->seq_len != 6)
334 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher))
340 unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc)
342 unsigned int hdrlen = 24;
344 if (ieee80211_is_data(fc)) {
345 if (ieee80211_has_a4(fc))
347 if (ieee80211_is_data_qos(fc)) {
348 hdrlen += IEEE80211_QOS_CTL_LEN;
349 if (ieee80211_has_order(fc))
350 hdrlen += IEEE80211_HT_CTL_LEN;
355 if (ieee80211_is_mgmt(fc)) {
356 if (ieee80211_has_order(fc))
357 hdrlen += IEEE80211_HT_CTL_LEN;
361 if (ieee80211_is_ctl(fc)) {
363 * ACK and CTS are 10 bytes, all others 16. To see how
364 * to get this condition consider
365 * subtype mask: 0b0000000011110000 (0x00F0)
366 * ACK subtype: 0b0000000011010000 (0x00D0)
367 * CTS subtype: 0b0000000011000000 (0x00C0)
368 * bits that matter: ^^^ (0x00E0)
369 * value of those: 0b0000000011000000 (0x00C0)
371 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
379 EXPORT_SYMBOL(ieee80211_hdrlen);
381 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
383 const struct ieee80211_hdr *hdr =
384 (const struct ieee80211_hdr *)skb->data;
387 if (unlikely(skb->len < 10))
389 hdrlen = ieee80211_hdrlen(hdr->frame_control);
390 if (unlikely(hdrlen > skb->len))
394 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
396 unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
398 int ae = meshhdr->flags & MESH_FLAGS_AE;
399 /* 802.11-2012, 8.2.4.7.3 */
404 case MESH_FLAGS_AE_A4:
406 case MESH_FLAGS_AE_A5_A6:
410 EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
412 int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
413 enum nl80211_iftype iftype)
415 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
416 u16 hdrlen, ethertype;
419 u8 src[ETH_ALEN] __aligned(2);
421 if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
424 hdrlen = ieee80211_hdrlen(hdr->frame_control);
426 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
428 * IEEE 802.11 address fields:
429 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
430 * 0 0 DA SA BSSID n/a
431 * 0 1 DA BSSID SA n/a
432 * 1 0 BSSID SA DA n/a
435 memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN);
436 memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN);
438 switch (hdr->frame_control &
439 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
440 case cpu_to_le16(IEEE80211_FCTL_TODS):
441 if (unlikely(iftype != NL80211_IFTYPE_AP &&
442 iftype != NL80211_IFTYPE_AP_VLAN &&
443 iftype != NL80211_IFTYPE_P2P_GO))
446 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
447 if (unlikely(iftype != NL80211_IFTYPE_WDS &&
448 iftype != NL80211_IFTYPE_MESH_POINT &&
449 iftype != NL80211_IFTYPE_AP_VLAN &&
450 iftype != NL80211_IFTYPE_STATION))
452 if (iftype == NL80211_IFTYPE_MESH_POINT) {
453 struct ieee80211s_hdr *meshdr =
454 (struct ieee80211s_hdr *) (skb->data + hdrlen);
455 /* make sure meshdr->flags is on the linear part */
456 if (!pskb_may_pull(skb, hdrlen + 1))
458 if (meshdr->flags & MESH_FLAGS_AE_A4)
460 if (meshdr->flags & MESH_FLAGS_AE_A5_A6) {
461 skb_copy_bits(skb, hdrlen +
462 offsetof(struct ieee80211s_hdr, eaddr1),
464 skb_copy_bits(skb, hdrlen +
465 offsetof(struct ieee80211s_hdr, eaddr2),
468 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
471 case cpu_to_le16(IEEE80211_FCTL_FROMDS):
472 if ((iftype != NL80211_IFTYPE_STATION &&
473 iftype != NL80211_IFTYPE_P2P_CLIENT &&
474 iftype != NL80211_IFTYPE_MESH_POINT) ||
475 (is_multicast_ether_addr(dst) &&
476 ether_addr_equal(src, addr)))
478 if (iftype == NL80211_IFTYPE_MESH_POINT) {
479 struct ieee80211s_hdr *meshdr =
480 (struct ieee80211s_hdr *) (skb->data + hdrlen);
481 /* make sure meshdr->flags is on the linear part */
482 if (!pskb_may_pull(skb, hdrlen + 1))
484 if (meshdr->flags & MESH_FLAGS_AE_A5_A6)
486 if (meshdr->flags & MESH_FLAGS_AE_A4)
487 skb_copy_bits(skb, hdrlen +
488 offsetof(struct ieee80211s_hdr, eaddr1),
490 hdrlen += ieee80211_get_mesh_hdrlen(meshdr);
494 if (iftype != NL80211_IFTYPE_ADHOC &&
495 iftype != NL80211_IFTYPE_STATION &&
496 iftype != NL80211_IFTYPE_OCB)
501 if (!pskb_may_pull(skb, hdrlen + 8))
504 payload = skb->data + hdrlen;
505 ethertype = (payload[6] << 8) | payload[7];
507 if (likely((ether_addr_equal(payload, rfc1042_header) &&
508 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
509 ether_addr_equal(payload, bridge_tunnel_header))) {
510 /* remove RFC1042 or Bridge-Tunnel encapsulation and
511 * replace EtherType */
512 skb_pull(skb, hdrlen + 6);
513 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
514 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
519 skb_pull(skb, hdrlen);
520 len = htons(skb->len);
521 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr));
522 memcpy(ehdr->h_dest, dst, ETH_ALEN);
523 memcpy(ehdr->h_source, src, ETH_ALEN);
528 EXPORT_SYMBOL(ieee80211_data_to_8023);
530 int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
531 enum nl80211_iftype iftype,
532 const u8 *bssid, bool qos)
534 struct ieee80211_hdr hdr;
535 u16 hdrlen, ethertype;
537 const u8 *encaps_data;
538 int encaps_len, skip_header_bytes;
542 if (unlikely(skb->len < ETH_HLEN))
545 nh_pos = skb_network_header(skb) - skb->data;
546 h_pos = skb_transport_header(skb) - skb->data;
548 /* convert Ethernet header to proper 802.11 header (based on
550 ethertype = (skb->data[12] << 8) | skb->data[13];
551 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
554 case NL80211_IFTYPE_AP:
555 case NL80211_IFTYPE_AP_VLAN:
556 case NL80211_IFTYPE_P2P_GO:
557 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
559 memcpy(hdr.addr1, skb->data, ETH_ALEN);
560 memcpy(hdr.addr2, addr, ETH_ALEN);
561 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
564 case NL80211_IFTYPE_STATION:
565 case NL80211_IFTYPE_P2P_CLIENT:
566 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
568 memcpy(hdr.addr1, bssid, ETH_ALEN);
569 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
570 memcpy(hdr.addr3, skb->data, ETH_ALEN);
573 case NL80211_IFTYPE_OCB:
574 case NL80211_IFTYPE_ADHOC:
576 memcpy(hdr.addr1, skb->data, ETH_ALEN);
577 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
578 memcpy(hdr.addr3, bssid, ETH_ALEN);
586 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
590 hdr.frame_control = fc;
594 skip_header_bytes = ETH_HLEN;
595 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
596 encaps_data = bridge_tunnel_header;
597 encaps_len = sizeof(bridge_tunnel_header);
598 skip_header_bytes -= 2;
599 } else if (ethertype >= ETH_P_802_3_MIN) {
600 encaps_data = rfc1042_header;
601 encaps_len = sizeof(rfc1042_header);
602 skip_header_bytes -= 2;
608 skb_pull(skb, skip_header_bytes);
609 nh_pos -= skip_header_bytes;
610 h_pos -= skip_header_bytes;
612 head_need = hdrlen + encaps_len - skb_headroom(skb);
614 if (head_need > 0 || skb_cloned(skb)) {
615 head_need = max(head_need, 0);
619 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC))
622 skb->truesize += head_need;
626 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
627 nh_pos += encaps_len;
631 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
636 /* Update skb pointers to various headers since this modified frame
637 * is going to go through Linux networking code that may potentially
638 * need things like pointer to IP header. */
639 skb_set_mac_header(skb, 0);
640 skb_set_network_header(skb, nh_pos);
641 skb_set_transport_header(skb, h_pos);
645 EXPORT_SYMBOL(ieee80211_data_from_8023);
648 void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
649 const u8 *addr, enum nl80211_iftype iftype,
650 const unsigned int extra_headroom,
651 bool has_80211_header)
653 struct sk_buff *frame = NULL;
656 const struct ethhdr *eth;
658 u8 dst[ETH_ALEN], src[ETH_ALEN];
660 if (has_80211_header) {
661 err = ieee80211_data_to_8023(skb, addr, iftype);
665 /* skip the wrapping header */
666 eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
670 eth = (struct ethhdr *) skb->data;
673 while (skb != frame) {
675 __be16 len = eth->h_proto;
676 unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len);
678 remaining = skb->len;
679 memcpy(dst, eth->h_dest, ETH_ALEN);
680 memcpy(src, eth->h_source, ETH_ALEN);
682 padding = (4 - subframe_len) & 0x3;
683 /* the last MSDU has no padding */
684 if (subframe_len > remaining)
687 skb_pull(skb, sizeof(struct ethhdr));
688 /* reuse skb for the last subframe */
689 if (remaining <= subframe_len + padding)
692 unsigned int hlen = ALIGN(extra_headroom, 4);
694 * Allocate and reserve two bytes more for payload
695 * alignment since sizeof(struct ethhdr) is 14.
697 frame = dev_alloc_skb(hlen + subframe_len + 2);
701 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2);
702 memcpy(skb_put(frame, ntohs(len)), skb->data,
705 eth = (struct ethhdr *)skb_pull(skb, ntohs(len) +
708 dev_kfree_skb(frame);
713 skb_reset_network_header(frame);
714 frame->dev = skb->dev;
715 frame->priority = skb->priority;
717 payload = frame->data;
718 ethertype = (payload[6] << 8) | payload[7];
720 if (likely((ether_addr_equal(payload, rfc1042_header) &&
721 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
722 ether_addr_equal(payload, bridge_tunnel_header))) {
723 /* remove RFC1042 or Bridge-Tunnel
724 * encapsulation and replace EtherType */
726 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
727 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
729 memcpy(skb_push(frame, sizeof(__be16)), &len,
731 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN);
732 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN);
734 __skb_queue_tail(list, frame);
740 __skb_queue_purge(list);
744 EXPORT_SYMBOL(ieee80211_amsdu_to_8023s);
746 /* Given a data frame determine the 802.1p/1d tag to use. */
747 unsigned int cfg80211_classify8021d(struct sk_buff *skb,
748 struct cfg80211_qos_map *qos_map)
751 unsigned char vlan_priority;
753 /* skb->priority values from 256->263 are magic values to
754 * directly indicate a specific 802.1d priority. This is used
755 * to allow 802.1d priority to be passed directly in from VLAN
758 if (skb->priority >= 256 && skb->priority <= 263)
759 return skb->priority - 256;
761 if (skb_vlan_tag_present(skb)) {
762 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK)
764 if (vlan_priority > 0)
765 return vlan_priority;
768 switch (skb->protocol) {
769 case htons(ETH_P_IP):
770 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc;
772 case htons(ETH_P_IPV6):
773 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc;
775 case htons(ETH_P_MPLS_UC):
776 case htons(ETH_P_MPLS_MC): {
777 struct mpls_label mpls_tmp, *mpls;
779 mpls = skb_header_pointer(skb, sizeof(struct ethhdr),
780 sizeof(*mpls), &mpls_tmp);
784 return (ntohl(mpls->entry) & MPLS_LS_TC_MASK)
787 case htons(ETH_P_80221):
788 /* 802.21 is always network control traffic */
795 unsigned int i, tmp_dscp = dscp >> 2;
797 for (i = 0; i < qos_map->num_des; i++) {
798 if (tmp_dscp == qos_map->dscp_exception[i].dscp)
799 return qos_map->dscp_exception[i].up;
802 for (i = 0; i < 8; i++) {
803 if (tmp_dscp >= qos_map->up[i].low &&
804 tmp_dscp <= qos_map->up[i].high)
811 EXPORT_SYMBOL(cfg80211_classify8021d);
813 const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
815 const struct cfg80211_bss_ies *ies;
817 ies = rcu_dereference(bss->ies);
821 return cfg80211_find_ie(ie, ies->data, ies->len);
823 EXPORT_SYMBOL(ieee80211_bss_get_ie);
825 void cfg80211_upload_connect_keys(struct wireless_dev *wdev)
827 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
828 struct net_device *dev = wdev->netdev;
831 if (!wdev->connect_keys)
834 for (i = 0; i < 6; i++) {
835 if (!wdev->connect_keys->params[i].cipher)
837 if (rdev_add_key(rdev, dev, i, false, NULL,
838 &wdev->connect_keys->params[i])) {
839 netdev_err(dev, "failed to set key %d\n", i);
842 if (wdev->connect_keys->def == i)
843 if (rdev_set_default_key(rdev, dev, i, true, true)) {
844 netdev_err(dev, "failed to set defkey %d\n", i);
847 if (wdev->connect_keys->defmgmt == i)
848 if (rdev_set_default_mgmt_key(rdev, dev, i))
849 netdev_err(dev, "failed to set mgtdef %d\n", i);
852 kzfree(wdev->connect_keys);
853 wdev->connect_keys = NULL;
856 void cfg80211_process_wdev_events(struct wireless_dev *wdev)
858 struct cfg80211_event *ev;
860 const u8 *bssid = NULL;
862 spin_lock_irqsave(&wdev->event_lock, flags);
863 while (!list_empty(&wdev->event_list)) {
864 ev = list_first_entry(&wdev->event_list,
865 struct cfg80211_event, list);
867 spin_unlock_irqrestore(&wdev->event_lock, flags);
871 case EVENT_CONNECT_RESULT:
872 if (!is_zero_ether_addr(ev->cr.bssid))
873 bssid = ev->cr.bssid;
874 __cfg80211_connect_result(
876 ev->cr.req_ie, ev->cr.req_ie_len,
877 ev->cr.resp_ie, ev->cr.resp_ie_len,
879 ev->cr.status == WLAN_STATUS_SUCCESS,
883 __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,
884 ev->rm.req_ie_len, ev->rm.resp_ie,
887 case EVENT_DISCONNECTED:
888 __cfg80211_disconnected(wdev->netdev,
889 ev->dc.ie, ev->dc.ie_len,
890 ev->dc.reason, true);
892 case EVENT_IBSS_JOINED:
893 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid,
897 __cfg80211_leave(wiphy_to_rdev(wdev->wiphy), wdev);
904 spin_lock_irqsave(&wdev->event_lock, flags);
906 spin_unlock_irqrestore(&wdev->event_lock, flags);
909 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev)
911 struct wireless_dev *wdev;
915 list_for_each_entry(wdev, &rdev->wdev_list, list)
916 cfg80211_process_wdev_events(wdev);
919 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
920 struct net_device *dev, enum nl80211_iftype ntype,
921 u32 *flags, struct vif_params *params)
924 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype;
928 /* don't support changing VLANs, you just re-create them */
929 if (otype == NL80211_IFTYPE_AP_VLAN)
932 /* cannot change into P2P device type */
933 if (ntype == NL80211_IFTYPE_P2P_DEVICE)
936 if (!rdev->ops->change_virtual_intf ||
937 !(rdev->wiphy.interface_modes & (1 << ntype)))
940 /* if it's part of a bridge, reject changing type to station/ibss */
941 if ((dev->priv_flags & IFF_BRIDGE_PORT) &&
942 (ntype == NL80211_IFTYPE_ADHOC ||
943 ntype == NL80211_IFTYPE_STATION ||
944 ntype == NL80211_IFTYPE_P2P_CLIENT))
947 if (ntype != otype && netif_running(dev)) {
948 dev->ieee80211_ptr->use_4addr = false;
949 dev->ieee80211_ptr->mesh_id_up_len = 0;
950 wdev_lock(dev->ieee80211_ptr);
951 rdev_set_qos_map(rdev, dev, NULL);
952 wdev_unlock(dev->ieee80211_ptr);
955 case NL80211_IFTYPE_AP:
956 cfg80211_stop_ap(rdev, dev, true);
958 case NL80211_IFTYPE_ADHOC:
959 cfg80211_leave_ibss(rdev, dev, false);
961 case NL80211_IFTYPE_STATION:
962 case NL80211_IFTYPE_P2P_CLIENT:
963 wdev_lock(dev->ieee80211_ptr);
964 cfg80211_disconnect(rdev, dev,
965 WLAN_REASON_DEAUTH_LEAVING, true);
966 wdev_unlock(dev->ieee80211_ptr);
968 case NL80211_IFTYPE_MESH_POINT:
969 /* mesh should be handled? */
975 cfg80211_process_rdev_events(rdev);
978 err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params);
980 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
982 if (!err && params && params->use_4addr != -1)
983 dev->ieee80211_ptr->use_4addr = params->use_4addr;
986 dev->priv_flags &= ~IFF_DONT_BRIDGE;
988 case NL80211_IFTYPE_STATION:
989 if (dev->ieee80211_ptr->use_4addr)
992 case NL80211_IFTYPE_OCB:
993 case NL80211_IFTYPE_P2P_CLIENT:
994 case NL80211_IFTYPE_ADHOC:
995 dev->priv_flags |= IFF_DONT_BRIDGE;
997 case NL80211_IFTYPE_P2P_GO:
998 case NL80211_IFTYPE_AP:
999 case NL80211_IFTYPE_AP_VLAN:
1000 case NL80211_IFTYPE_WDS:
1001 case NL80211_IFTYPE_MESH_POINT:
1004 case NL80211_IFTYPE_MONITOR:
1005 /* monitor can't bridge anyway */
1007 case NL80211_IFTYPE_UNSPECIFIED:
1008 case NUM_NL80211_IFTYPES:
1011 case NL80211_IFTYPE_P2P_DEVICE:
1017 if (!err && ntype != otype && netif_running(dev)) {
1018 cfg80211_update_iface_num(rdev, ntype, 1);
1019 cfg80211_update_iface_num(rdev, otype, -1);
1025 static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)
1027 static const u32 __mcs2bitrate[] = {
1035 [5] = 12512, /* 1251.25 mbps */
1045 [14] = 8662, /* 866.25 mbps */
1055 [24] = 67568, /* 6756.75 mbps */
1066 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))
1069 return __mcs2bitrate[rate->mcs];
1072 static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
1074 static const u32 base[4][10] = {
1123 if (WARN_ON_ONCE(rate->mcs > 9))
1127 case RATE_INFO_BW_160:
1130 case RATE_INFO_BW_80:
1133 case RATE_INFO_BW_40:
1136 case RATE_INFO_BW_5:
1137 case RATE_INFO_BW_10:
1141 case RATE_INFO_BW_20:
1145 bitrate = base[idx][rate->mcs];
1146 bitrate *= rate->nss;
1148 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1149 bitrate = (bitrate / 9) * 10;
1151 /* do NOT round down here */
1152 return (bitrate + 50000) / 100000;
1155 u32 cfg80211_calculate_bitrate(struct rate_info *rate)
1157 int modulation, streams, bitrate;
1159 if (!(rate->flags & RATE_INFO_FLAGS_MCS) &&
1160 !(rate->flags & RATE_INFO_FLAGS_VHT_MCS))
1161 return rate->legacy;
1162 if (rate->flags & RATE_INFO_FLAGS_60G)
1163 return cfg80211_calculate_bitrate_60g(rate);
1164 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
1165 return cfg80211_calculate_bitrate_vht(rate);
1167 /* the formula below does only work for MCS values smaller than 32 */
1168 if (WARN_ON_ONCE(rate->mcs >= 32))
1171 modulation = rate->mcs & 7;
1172 streams = (rate->mcs >> 3) + 1;
1174 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000;
1177 bitrate *= (modulation + 1);
1178 else if (modulation == 4)
1179 bitrate *= (modulation + 2);
1181 bitrate *= (modulation + 3);
1185 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1186 bitrate = (bitrate / 9) * 10;
1188 /* do NOT round down here */
1189 return (bitrate + 50000) / 100000;
1191 EXPORT_SYMBOL(cfg80211_calculate_bitrate);
1193 int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
1194 enum ieee80211_p2p_attr_id attr,
1195 u8 *buf, unsigned int bufsize)
1198 u16 attr_remaining = 0;
1199 bool desired_attr = false;
1200 u16 desired_len = 0;
1203 unsigned int iedatalen;
1210 if (iedatalen + 2 > len)
1213 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC)
1221 /* check WFA OUI, P2P subtype */
1222 if (iedata[0] != 0x50 || iedata[1] != 0x6f ||
1223 iedata[2] != 0x9a || iedata[3] != 0x09)
1229 /* check attribute continuation into this IE */
1230 copy = min_t(unsigned int, attr_remaining, iedatalen);
1231 if (copy && desired_attr) {
1232 desired_len += copy;
1234 memcpy(out, iedata, min(bufsize, copy));
1235 out += min(bufsize, copy);
1236 bufsize -= min(bufsize, copy);
1240 if (copy == attr_remaining)
1244 attr_remaining -= copy;
1251 while (iedatalen > 0) {
1254 /* P2P attribute ID & size must fit */
1257 desired_attr = iedata[0] == attr;
1258 attr_len = get_unaligned_le16(iedata + 1);
1262 copy = min_t(unsigned int, attr_len, iedatalen);
1265 desired_len += copy;
1267 memcpy(out, iedata, min(bufsize, copy));
1268 out += min(bufsize, copy);
1269 bufsize -= min(bufsize, copy);
1272 if (copy == attr_len)
1278 attr_remaining = attr_len - copy;
1286 if (attr_remaining && desired_attr)
1291 EXPORT_SYMBOL(cfg80211_get_p2p_attr);
1293 bool ieee80211_operating_class_to_band(u8 operating_class,
1294 enum ieee80211_band *band)
1296 switch (operating_class) {
1299 *band = IEEE80211_BAND_5GHZ;
1305 *band = IEEE80211_BAND_2GHZ;
1308 *band = IEEE80211_BAND_60GHZ;
1314 EXPORT_SYMBOL(ieee80211_operating_class_to_band);
1316 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
1319 struct wireless_dev *wdev;
1325 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1326 if (!wdev->beacon_interval)
1328 if (wdev->beacon_interval != beacon_int) {
1337 int cfg80211_iter_combinations(struct wiphy *wiphy,
1338 const int num_different_channels,
1339 const u8 radar_detect,
1340 const int iftype_num[NUM_NL80211_IFTYPES],
1341 void (*iter)(const struct ieee80211_iface_combination *c,
1345 const struct ieee80211_regdomain *regdom;
1346 enum nl80211_dfs_regions region = 0;
1348 int num_interfaces = 0;
1349 u32 used_iftypes = 0;
1353 regdom = rcu_dereference(cfg80211_regdomain);
1355 region = regdom->dfs_region;
1359 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1360 num_interfaces += iftype_num[iftype];
1361 if (iftype_num[iftype] > 0 &&
1362 !(wiphy->software_iftypes & BIT(iftype)))
1363 used_iftypes |= BIT(iftype);
1366 for (i = 0; i < wiphy->n_iface_combinations; i++) {
1367 const struct ieee80211_iface_combination *c;
1368 struct ieee80211_iface_limit *limits;
1369 u32 all_iftypes = 0;
1371 c = &wiphy->iface_combinations[i];
1373 if (num_interfaces > c->max_interfaces)
1375 if (num_different_channels > c->num_different_channels)
1378 limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits,
1383 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
1384 if (wiphy->software_iftypes & BIT(iftype))
1386 for (j = 0; j < c->n_limits; j++) {
1387 all_iftypes |= limits[j].types;
1388 if (!(limits[j].types & BIT(iftype)))
1390 if (limits[j].max < iftype_num[iftype])
1392 limits[j].max -= iftype_num[iftype];
1396 if (radar_detect != (c->radar_detect_widths & radar_detect))
1399 if (radar_detect && c->radar_detect_regions &&
1400 !(c->radar_detect_regions & BIT(region)))
1403 /* Finally check that all iftypes that we're currently
1404 * using are actually part of this combination. If they
1405 * aren't then we can't use this combination and have
1406 * to continue to the next.
1408 if ((all_iftypes & used_iftypes) != used_iftypes)
1411 /* This combination covered all interface types and
1412 * supported the requested numbers, so we're good.
1422 EXPORT_SYMBOL(cfg80211_iter_combinations);
1425 cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c,
1432 int cfg80211_check_combinations(struct wiphy *wiphy,
1433 const int num_different_channels,
1434 const u8 radar_detect,
1435 const int iftype_num[NUM_NL80211_IFTYPES])
1439 err = cfg80211_iter_combinations(wiphy, num_different_channels,
1440 radar_detect, iftype_num,
1441 cfg80211_iter_sum_ifcombs, &num);
1449 EXPORT_SYMBOL(cfg80211_check_combinations);
1451 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
1452 struct wireless_dev *wdev,
1453 enum nl80211_iftype iftype,
1454 struct ieee80211_channel *chan,
1455 enum cfg80211_chan_mode chanmode,
1458 struct wireless_dev *wdev_iter;
1459 int num[NUM_NL80211_IFTYPES];
1460 struct ieee80211_channel
1461 *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS];
1462 struct ieee80211_channel *ch;
1463 enum cfg80211_chan_mode chmode;
1464 int num_different_channels = 0;
1470 if (WARN_ON(hweight32(radar_detect) > 1))
1473 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
1476 /* Always allow software iftypes */
1477 if (rdev->wiphy.software_iftypes & BIT(iftype)) {
1483 memset(num, 0, sizeof(num));
1484 memset(used_channels, 0, sizeof(used_channels));
1488 /* TODO: We'll probably not need this anymore, since this
1489 * should only be called with CHAN_MODE_UNDEFINED. There are
1490 * still a couple of pending calls where other chanmodes are
1491 * used, but we should get rid of them.
1494 case CHAN_MODE_UNDEFINED:
1496 case CHAN_MODE_SHARED:
1498 used_channels[0] = chan;
1499 num_different_channels++;
1501 case CHAN_MODE_EXCLUSIVE:
1502 num_different_channels++;
1506 list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
1507 if (wdev_iter == wdev)
1509 if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) {
1510 if (!wdev_iter->p2p_started)
1512 } else if (wdev_iter->netdev) {
1513 if (!netif_running(wdev_iter->netdev))
1519 if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
1523 * We may be holding the "wdev" mutex, but now need to lock
1524 * wdev_iter. This is OK because once we get here wdev_iter
1525 * is not wdev (tested above), but we need to use the nested
1526 * locking for lockdep.
1528 mutex_lock_nested(&wdev_iter->mtx, 1);
1529 __acquire(wdev_iter->mtx);
1530 cfg80211_get_chan_state(wdev_iter, &ch, &chmode, &radar_detect);
1531 wdev_unlock(wdev_iter);
1534 case CHAN_MODE_UNDEFINED:
1536 case CHAN_MODE_SHARED:
1537 for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++)
1538 if (!used_channels[i] || used_channels[i] == ch)
1541 if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS)
1544 if (used_channels[i] == NULL) {
1545 used_channels[i] = ch;
1546 num_different_channels++;
1549 case CHAN_MODE_EXCLUSIVE:
1550 num_different_channels++;
1554 num[wdev_iter->iftype]++;
1558 if (total == 1 && !radar_detect)
1561 return cfg80211_check_combinations(&rdev->wiphy, num_different_channels,
1565 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
1566 const u8 *rates, unsigned int n_rates,
1574 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES)
1579 for (i = 0; i < n_rates; i++) {
1580 int rate = (rates[i] & 0x7f) * 5;
1583 for (j = 0; j < sband->n_bitrates; j++) {
1584 if (sband->bitrates[j].bitrate == rate) {
1595 * mask must have at least one bit set here since we
1596 * didn't accept a 0-length rates array nor allowed
1597 * entries in the array that didn't exist
1603 unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy)
1605 enum ieee80211_band band;
1606 unsigned int n_channels = 0;
1608 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
1609 if (wiphy->bands[band])
1610 n_channels += wiphy->bands[band]->n_channels;
1614 EXPORT_SYMBOL(ieee80211_get_num_supported_channels);
1616 int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
1617 struct station_info *sinfo)
1619 struct cfg80211_registered_device *rdev;
1620 struct wireless_dev *wdev;
1622 wdev = dev->ieee80211_ptr;
1626 rdev = wiphy_to_rdev(wdev->wiphy);
1627 if (!rdev->ops->get_station)
1630 return rdev_get_station(rdev, dev, mac_addr, sinfo);
1632 EXPORT_SYMBOL(cfg80211_get_station);
1634 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
1635 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
1636 const unsigned char rfc1042_header[] __aligned(2) =
1637 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
1638 EXPORT_SYMBOL(rfc1042_header);
1640 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
1641 const unsigned char bridge_tunnel_header[] __aligned(2) =
1642 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
1643 EXPORT_SYMBOL(bridge_tunnel_header);