| /* |
| * Wireless utility functions |
| * |
| * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> |
| */ |
| #include <linux/export.h> |
| #include <linux/bitops.h> |
| #include <linux/etherdevice.h> |
| #include <linux/slab.h> |
| #include <net/cfg80211.h> |
| #include <net/ip.h> |
| #include <net/dsfield.h> |
| #include "core.h" |
| #include "rdev-ops.h" |
| |
| |
| struct ieee80211_rate * |
| ieee80211_get_response_rate(struct ieee80211_supported_band *sband, |
| u32 basic_rates, int bitrate) |
| { |
| struct ieee80211_rate *result = &sband->bitrates[0]; |
| int i; |
| |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if (!(basic_rates & BIT(i))) |
| continue; |
| if (sband->bitrates[i].bitrate > bitrate) |
| continue; |
| result = &sband->bitrates[i]; |
| } |
| |
| return result; |
| } |
| EXPORT_SYMBOL(ieee80211_get_response_rate); |
| |
| int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band) |
| { |
| /* see 802.11 17.3.8.3.2 and Annex J |
| * there are overlapping channel numbers in 5GHz and 2GHz bands */ |
| if (chan <= 0) |
| return 0; /* not supported */ |
| switch (band) { |
| case IEEE80211_BAND_2GHZ: |
| if (chan == 14) |
| return 2484; |
| else if (chan < 14) |
| return 2407 + chan * 5; |
| break; |
| case IEEE80211_BAND_5GHZ: |
| if (chan >= 182 && chan <= 196) |
| return 4000 + chan * 5; |
| else |
| return 5000 + chan * 5; |
| break; |
| case IEEE80211_BAND_60GHZ: |
| if (chan < 5) |
| return 56160 + chan * 2160; |
| break; |
| default: |
| ; |
| } |
| return 0; /* not supported */ |
| } |
| EXPORT_SYMBOL(ieee80211_channel_to_frequency); |
| |
| int ieee80211_frequency_to_channel(int freq) |
| { |
| /* see 802.11 17.3.8.3.2 and Annex J */ |
| if (freq == 2484) |
| return 14; |
| else if (freq < 2484) |
| return (freq - 2407) / 5; |
| else if (freq >= 4910 && freq <= 4980) |
| return (freq - 4000) / 5; |
| else if (freq <= 45000) /* DMG band lower limit */ |
| return (freq - 5000) / 5; |
| else if (freq >= 58320 && freq <= 64800) |
| return (freq - 56160) / 2160; |
| else |
| return 0; |
| } |
| EXPORT_SYMBOL(ieee80211_frequency_to_channel); |
| |
| struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, |
| int freq) |
| { |
| enum ieee80211_band band; |
| struct ieee80211_supported_band *sband; |
| int i; |
| |
| for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| sband = wiphy->bands[band]; |
| |
| if (!sband) |
| continue; |
| |
| for (i = 0; i < sband->n_channels; i++) { |
| if (sband->channels[i].center_freq == freq) |
| return &sband->channels[i]; |
| } |
| } |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(__ieee80211_get_channel); |
| |
| static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, |
| enum ieee80211_band band) |
| { |
| int i, want; |
| |
| switch (band) { |
| case IEEE80211_BAND_5GHZ: |
| want = 3; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if (sband->bitrates[i].bitrate == 60 || |
| sband->bitrates[i].bitrate == 120 || |
| sband->bitrates[i].bitrate == 240) { |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_MANDATORY_A; |
| want--; |
| } |
| } |
| WARN_ON(want); |
| break; |
| case IEEE80211_BAND_2GHZ: |
| want = 7; |
| for (i = 0; i < sband->n_bitrates; i++) { |
| if (sband->bitrates[i].bitrate == 10) { |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_MANDATORY_B | |
| IEEE80211_RATE_MANDATORY_G; |
| want--; |
| } |
| |
| if (sband->bitrates[i].bitrate == 20 || |
| sband->bitrates[i].bitrate == 55 || |
| sband->bitrates[i].bitrate == 110 || |
| sband->bitrates[i].bitrate == 60 || |
| sband->bitrates[i].bitrate == 120 || |
| sband->bitrates[i].bitrate == 240) { |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_MANDATORY_G; |
| want--; |
| } |
| |
| if (sband->bitrates[i].bitrate != 10 && |
| sband->bitrates[i].bitrate != 20 && |
| sband->bitrates[i].bitrate != 55 && |
| sband->bitrates[i].bitrate != 110) |
| sband->bitrates[i].flags |= |
| IEEE80211_RATE_ERP_G; |
| } |
| WARN_ON(want != 0 && want != 3 && want != 6); |
| break; |
| case IEEE80211_BAND_60GHZ: |
| /* check for mandatory HT MCS 1..4 */ |
| WARN_ON(!sband->ht_cap.ht_supported); |
| WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); |
| break; |
| case IEEE80211_NUM_BANDS: |
| WARN_ON(1); |
| break; |
| } |
| } |
| |
| void ieee80211_set_bitrate_flags(struct wiphy *wiphy) |
| { |
| enum ieee80211_band band; |
| |
| for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
| if (wiphy->bands[band]) |
| set_mandatory_flags_band(wiphy->bands[band], band); |
| } |
| |
| bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) |
| { |
| int i; |
| for (i = 0; i < wiphy->n_cipher_suites; i++) |
| if (cipher == wiphy->cipher_suites[i]) |
| return true; |
| return false; |
| } |
| |
| int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, |
| struct key_params *params, int key_idx, |
| bool pairwise, const u8 *mac_addr) |
| { |
| if (key_idx > 5) |
| return -EINVAL; |
| |
| if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) |
| return -EINVAL; |
| |
| if (pairwise && !mac_addr) |
| return -EINVAL; |
| |
| /* |
| * Disallow pairwise keys with non-zero index unless it's WEP |
| * or a vendor specific cipher (because current deployments use |
| * pairwise WEP keys with non-zero indices and for vendor specific |
| * ciphers this should be validated in the driver or hardware level |
| * - but 802.11i clearly specifies to use zero) |
| */ |
| if (pairwise && key_idx && |
| ((params->cipher == WLAN_CIPHER_SUITE_TKIP) || |
| (params->cipher == WLAN_CIPHER_SUITE_CCMP) || |
| (params->cipher == WLAN_CIPHER_SUITE_AES_CMAC))) |
| return -EINVAL; |
| |
| switch (params->cipher) { |
| case WLAN_CIPHER_SUITE_WEP40: |
| if (params->key_len != WLAN_KEY_LEN_WEP40) |
| return -EINVAL; |
| break; |
| case WLAN_CIPHER_SUITE_TKIP: |
| if (params->key_len != WLAN_KEY_LEN_TKIP) |
| return -EINVAL; |
| break; |
| case WLAN_CIPHER_SUITE_CCMP: |
| if (params->key_len != WLAN_KEY_LEN_CCMP) |
| return -EINVAL; |
| break; |
| case WLAN_CIPHER_SUITE_WEP104: |
| if (params->key_len != WLAN_KEY_LEN_WEP104) |
| return -EINVAL; |
| break; |
| case WLAN_CIPHER_SUITE_AES_CMAC: |
| if (params->key_len != WLAN_KEY_LEN_AES_CMAC) |
| return -EINVAL; |
| break; |
| default: |
| /* |
| * We don't know anything about this algorithm, |
| * allow using it -- but the driver must check |
| * all parameters! We still check below whether |
| * or not the driver supports this algorithm, |
| * of course. |
| */ |
| break; |
| } |
| |
| if (params->seq) { |
| switch (params->cipher) { |
| case WLAN_CIPHER_SUITE_WEP40: |
| case WLAN_CIPHER_SUITE_WEP104: |
| /* These ciphers do not use key sequence */ |
| return -EINVAL; |
| case WLAN_CIPHER_SUITE_TKIP: |
| case WLAN_CIPHER_SUITE_CCMP: |
| case WLAN_CIPHER_SUITE_AES_CMAC: |
| if (params->seq_len != 6) |
| return -EINVAL; |
| break; |
| } |
| } |
| |
| if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) |
| { |
| unsigned int hdrlen = 24; |
| |
| if (ieee80211_is_data(fc)) { |
| if (ieee80211_has_a4(fc)) |
| hdrlen = 30; |
| if (ieee80211_is_data_qos(fc)) { |
| hdrlen += IEEE80211_QOS_CTL_LEN; |
| if (ieee80211_has_order(fc)) |
| hdrlen += IEEE80211_HT_CTL_LEN; |
| } |
| goto out; |
| } |
| |
| if (ieee80211_is_ctl(fc)) { |
| /* |
| * ACK and CTS are 10 bytes, all others 16. To see how |
| * to get this condition consider |
| * subtype mask: 0b0000000011110000 (0x00F0) |
| * ACK subtype: 0b0000000011010000 (0x00D0) |
| * CTS subtype: 0b0000000011000000 (0x00C0) |
| * bits that matter: ^^^ (0x00E0) |
| * value of those: 0b0000000011000000 (0x00C0) |
| */ |
| if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) |
| hdrlen = 10; |
| else |
| hdrlen = 16; |
| } |
| out: |
| return hdrlen; |
| } |
| EXPORT_SYMBOL(ieee80211_hdrlen); |
| |
| unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
| { |
| const struct ieee80211_hdr *hdr = |
| (const struct ieee80211_hdr *)skb->data; |
| unsigned int hdrlen; |
| |
| if (unlikely(skb->len < 10)) |
| return 0; |
| hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| if (unlikely(hdrlen > skb->len)) |
| return 0; |
| return hdrlen; |
| } |
| EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); |
| |
| unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) |
| { |
| int ae = meshhdr->flags & MESH_FLAGS_AE; |
| /* 802.11-2012, 8.2.4.7.3 */ |
| switch (ae) { |
| default: |
| case 0: |
| return 6; |
| case MESH_FLAGS_AE_A4: |
| return 12; |
| case MESH_FLAGS_AE_A5_A6: |
| return 18; |
| } |
| } |
| EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); |
| |
| int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, |
| enum nl80211_iftype iftype) |
| { |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| u16 hdrlen, ethertype; |
| u8 *payload; |
| u8 dst[ETH_ALEN]; |
| u8 src[ETH_ALEN] __aligned(2); |
| |
| if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
| return -1; |
| |
| hdrlen = ieee80211_hdrlen(hdr->frame_control); |
| |
| /* convert IEEE 802.11 header + possible LLC headers into Ethernet |
| * header |
| * IEEE 802.11 address fields: |
| * ToDS FromDS Addr1 Addr2 Addr3 Addr4 |
| * 0 0 DA SA BSSID n/a |
| * 0 1 DA BSSID SA n/a |
| * 1 0 BSSID SA DA n/a |
| * 1 1 RA TA DA SA |
| */ |
| memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); |
| memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); |
| |
| switch (hdr->frame_control & |
| cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { |
| case cpu_to_le16(IEEE80211_FCTL_TODS): |
| if (unlikely(iftype != NL80211_IFTYPE_AP && |
| iftype != NL80211_IFTYPE_AP_VLAN && |
| iftype != NL80211_IFTYPE_P2P_GO)) |
| return -1; |
| break; |
| case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): |
| if (unlikely(iftype != NL80211_IFTYPE_WDS && |
| iftype != NL80211_IFTYPE_MESH_POINT && |
| iftype != NL80211_IFTYPE_AP_VLAN && |
| iftype != NL80211_IFTYPE_STATION)) |
| return -1; |
| if (iftype == NL80211_IFTYPE_MESH_POINT) { |
| struct ieee80211s_hdr *meshdr = |
| (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| /* make sure meshdr->flags is on the linear part */ |
| if (!pskb_may_pull(skb, hdrlen + 1)) |
| return -1; |
| if (meshdr->flags & MESH_FLAGS_AE_A4) |
| return -1; |
| if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { |
| skb_copy_bits(skb, hdrlen + |
| offsetof(struct ieee80211s_hdr, eaddr1), |
| dst, ETH_ALEN); |
| skb_copy_bits(skb, hdrlen + |
| offsetof(struct ieee80211s_hdr, eaddr2), |
| src, ETH_ALEN); |
| } |
| hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
| } |
| break; |
| case cpu_to_le16(IEEE80211_FCTL_FROMDS): |
| if ((iftype != NL80211_IFTYPE_STATION && |
| iftype != NL80211_IFTYPE_P2P_CLIENT && |
| iftype != NL80211_IFTYPE_MESH_POINT) || |
| (is_multicast_ether_addr(dst) && |
| ether_addr_equal(src, addr))) |
| return -1; |
| if (iftype == NL80211_IFTYPE_MESH_POINT) { |
| struct ieee80211s_hdr *meshdr = |
| (struct ieee80211s_hdr *) (skb->data + hdrlen); |
| /* make sure meshdr->flags is on the linear part */ |
| if (!pskb_may_pull(skb, hdrlen + 1)) |
| return -1; |
| if (meshdr->flags & MESH_FLAGS_AE_A5_A6) |
| return -1; |
| if (meshdr->flags & MESH_FLAGS_AE_A4) |
| skb_copy_bits(skb, hdrlen + |
| offsetof(struct ieee80211s_hdr, eaddr1), |
| src, ETH_ALEN); |
| hdrlen += ieee80211_get_mesh_hdrlen(meshdr); |
| } |
| break; |
| case cpu_to_le16(0): |
| if (iftype != NL80211_IFTYPE_ADHOC && |
| iftype != NL80211_IFTYPE_STATION) |
| return -1; |
| break; |
| } |
| |
| if (!pskb_may_pull(skb, hdrlen + 8)) |
| return -1; |
| |
| payload = skb->data + hdrlen; |
| ethertype = (payload[6] << 8) | payload[7]; |
| |
| if (likely((ether_addr_equal(payload, rfc1042_header) && |
| ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| ether_addr_equal(payload, bridge_tunnel_header))) { |
| /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| * replace EtherType */ |
| skb_pull(skb, hdrlen + 6); |
| memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); |
| memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); |
| } else { |
| struct ethhdr *ehdr; |
| __be16 len; |
| |
| skb_pull(skb, hdrlen); |
| len = htons(skb->len); |
| ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); |
| memcpy(ehdr->h_dest, dst, ETH_ALEN); |
| memcpy(ehdr->h_source, src, ETH_ALEN); |
| ehdr->h_proto = len; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(ieee80211_data_to_8023); |
| |
| int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, |
| enum nl80211_iftype iftype, u8 *bssid, bool qos) |
| { |
| struct ieee80211_hdr hdr; |
| u16 hdrlen, ethertype; |
| __le16 fc; |
| const u8 *encaps_data; |
| int encaps_len, skip_header_bytes; |
| int nh_pos, h_pos; |
| int head_need; |
| |
| if (unlikely(skb->len < ETH_HLEN)) |
| return -EINVAL; |
| |
| nh_pos = skb_network_header(skb) - skb->data; |
| h_pos = skb_transport_header(skb) - skb->data; |
| |
| /* convert Ethernet header to proper 802.11 header (based on |
| * operation mode) */ |
| ethertype = (skb->data[12] << 8) | skb->data[13]; |
| fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
| |
| switch (iftype) { |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_AP_VLAN: |
| case NL80211_IFTYPE_P2P_GO: |
| fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
| /* DA BSSID SA */ |
| memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| memcpy(hdr.addr2, addr, ETH_ALEN); |
| memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
| hdrlen = 24; |
| break; |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_P2P_CLIENT: |
| fc |= cpu_to_le16(IEEE80211_FCTL_TODS); |
| /* BSSID SA DA */ |
| memcpy(hdr.addr1, bssid, ETH_ALEN); |
| memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| hdrlen = 24; |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| /* DA SA BSSID */ |
| memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| memcpy(hdr.addr3, bssid, ETH_ALEN); |
| hdrlen = 24; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| if (qos) { |
| fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
| hdrlen += 2; |
| } |
| |
| hdr.frame_control = fc; |
| hdr.duration_id = 0; |
| hdr.seq_ctrl = 0; |
| |
| skip_header_bytes = ETH_HLEN; |
| if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { |
| encaps_data = bridge_tunnel_header; |
| encaps_len = sizeof(bridge_tunnel_header); |
| skip_header_bytes -= 2; |
| } else if (ethertype > 0x600) { |
| encaps_data = rfc1042_header; |
| encaps_len = sizeof(rfc1042_header); |
| skip_header_bytes -= 2; |
| } else { |
| encaps_data = NULL; |
| encaps_len = 0; |
| } |
| |
| skb_pull(skb, skip_header_bytes); |
| nh_pos -= skip_header_bytes; |
| h_pos -= skip_header_bytes; |
| |
| head_need = hdrlen + encaps_len - skb_headroom(skb); |
| |
| if (head_need > 0 || skb_cloned(skb)) { |
| head_need = max(head_need, 0); |
| if (head_need) |
| skb_orphan(skb); |
| |
| if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) |
| return -ENOMEM; |
| |
| skb->truesize += head_need; |
| } |
| |
| if (encaps_data) { |
| memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
| nh_pos += encaps_len; |
| h_pos += encaps_len; |
| } |
| |
| memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); |
| |
| nh_pos += hdrlen; |
| h_pos += hdrlen; |
| |
| /* Update skb pointers to various headers since this modified frame |
| * is going to go through Linux networking code that may potentially |
| * need things like pointer to IP header. */ |
| skb_set_mac_header(skb, 0); |
| skb_set_network_header(skb, nh_pos); |
| skb_set_transport_header(skb, h_pos); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(ieee80211_data_from_8023); |
| |
| |
| void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, |
| const u8 *addr, enum nl80211_iftype iftype, |
| const unsigned int extra_headroom, |
| bool has_80211_header) |
| { |
| struct sk_buff *frame = NULL; |
| u16 ethertype; |
| u8 *payload; |
| const struct ethhdr *eth; |
| int remaining, err; |
| u8 dst[ETH_ALEN], src[ETH_ALEN]; |
| |
| if (has_80211_header) { |
| err = ieee80211_data_to_8023(skb, addr, iftype); |
| if (err) |
| goto out; |
| |
| /* skip the wrapping header */ |
| eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); |
| if (!eth) |
| goto out; |
| } else { |
| eth = (struct ethhdr *) skb->data; |
| } |
| |
| while (skb != frame) { |
| u8 padding; |
| __be16 len = eth->h_proto; |
| unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); |
| |
| remaining = skb->len; |
| memcpy(dst, eth->h_dest, ETH_ALEN); |
| memcpy(src, eth->h_source, ETH_ALEN); |
| |
| padding = (4 - subframe_len) & 0x3; |
| /* the last MSDU has no padding */ |
| if (subframe_len > remaining) |
| goto purge; |
| |
| skb_pull(skb, sizeof(struct ethhdr)); |
| /* reuse skb for the last subframe */ |
| if (remaining <= subframe_len + padding) |
| frame = skb; |
| else { |
| unsigned int hlen = ALIGN(extra_headroom, 4); |
| /* |
| * Allocate and reserve two bytes more for payload |
| * alignment since sizeof(struct ethhdr) is 14. |
| */ |
| frame = dev_alloc_skb(hlen + subframe_len + 2); |
| if (!frame) |
| goto purge; |
| |
| skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); |
| memcpy(skb_put(frame, ntohs(len)), skb->data, |
| ntohs(len)); |
| |
| eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + |
| padding); |
| if (!eth) { |
| dev_kfree_skb(frame); |
| goto purge; |
| } |
| } |
| |
| skb_reset_network_header(frame); |
| frame->dev = skb->dev; |
| frame->priority = skb->priority; |
| |
| payload = frame->data; |
| ethertype = (payload[6] << 8) | payload[7]; |
| |
| if (likely((ether_addr_equal(payload, rfc1042_header) && |
| ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || |
| ether_addr_equal(payload, bridge_tunnel_header))) { |
| /* remove RFC1042 or Bridge-Tunnel |
| * encapsulation and replace EtherType */ |
| skb_pull(frame, 6); |
| memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); |
| memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); |
| } else { |
| memcpy(skb_push(frame, sizeof(__be16)), &len, |
| sizeof(__be16)); |
| memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); |
| memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); |
| } |
| __skb_queue_tail(list, frame); |
| } |
| |
| return; |
| |
| purge: |
| __skb_queue_purge(list); |
| out: |
| dev_kfree_skb(skb); |
| } |
| EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); |
| |
| /* Given a data frame determine the 802.1p/1d tag to use. */ |
| unsigned int cfg80211_classify8021d(struct sk_buff *skb) |
| { |
| unsigned int dscp; |
| |
| /* skb->priority values from 256->263 are magic values to |
| * directly indicate a specific 802.1d priority. This is used |
| * to allow 802.1d priority to be passed directly in from VLAN |
| * tags, etc. |
| */ |
| if (skb->priority >= 256 && skb->priority <= 263) |
| return skb->priority - 256; |
| |
| switch (skb->protocol) { |
| case htons(ETH_P_IP): |
| dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; |
| break; |
| case htons(ETH_P_IPV6): |
| dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; |
| break; |
| default: |
| return 0; |
| } |
| |
| return dscp >> 5; |
| } |
| EXPORT_SYMBOL(cfg80211_classify8021d); |
| |
| const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) |
| { |
| const struct cfg80211_bss_ies *ies; |
| |
| ies = rcu_dereference(bss->ies); |
| if (!ies) |
| return NULL; |
| |
| return cfg80211_find_ie(ie, ies->data, ies->len); |
| } |
| EXPORT_SYMBOL(ieee80211_bss_get_ie); |
| |
| void cfg80211_upload_connect_keys(struct wireless_dev *wdev) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); |
| struct net_device *dev = wdev->netdev; |
| int i; |
| |
| if (!wdev->connect_keys) |
| return; |
| |
| for (i = 0; i < 6; i++) { |
| if (!wdev->connect_keys->params[i].cipher) |
| continue; |
| if (rdev_add_key(rdev, dev, i, false, NULL, |
| &wdev->connect_keys->params[i])) { |
| netdev_err(dev, "failed to set key %d\n", i); |
| continue; |
| } |
| if (wdev->connect_keys->def == i) |
| if (rdev_set_default_key(rdev, dev, i, true, true)) { |
| netdev_err(dev, "failed to set defkey %d\n", i); |
| continue; |
| } |
| if (wdev->connect_keys->defmgmt == i) |
| if (rdev_set_default_mgmt_key(rdev, dev, i)) |
| netdev_err(dev, "failed to set mgtdef %d\n", i); |
| } |
| |
| kfree(wdev->connect_keys); |
| wdev->connect_keys = NULL; |
| } |
| |
| void cfg80211_process_wdev_events(struct wireless_dev *wdev) |
| { |
| struct cfg80211_event *ev; |
| unsigned long flags; |
| const u8 *bssid = NULL; |
| |
| spin_lock_irqsave(&wdev->event_lock, flags); |
| while (!list_empty(&wdev->event_list)) { |
| ev = list_first_entry(&wdev->event_list, |
| struct cfg80211_event, list); |
| list_del(&ev->list); |
| spin_unlock_irqrestore(&wdev->event_lock, flags); |
| |
| wdev_lock(wdev); |
| switch (ev->type) { |
| case EVENT_CONNECT_RESULT: |
| if (!is_zero_ether_addr(ev->cr.bssid)) |
| bssid = ev->cr.bssid; |
| __cfg80211_connect_result( |
| wdev->netdev, bssid, |
| ev->cr.req_ie, ev->cr.req_ie_len, |
| ev->cr.resp_ie, ev->cr.resp_ie_len, |
| ev->cr.status, |
| ev->cr.status == WLAN_STATUS_SUCCESS, |
| NULL); |
| break; |
| case EVENT_ROAMED: |
| __cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie, |
| ev->rm.req_ie_len, ev->rm.resp_ie, |
| ev->rm.resp_ie_len); |
| break; |
| case EVENT_DISCONNECTED: |
| __cfg80211_disconnected(wdev->netdev, |
| ev->dc.ie, ev->dc.ie_len, |
| ev->dc.reason, true); |
| break; |
| case EVENT_IBSS_JOINED: |
| __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid); |
| break; |
| } |
| wdev_unlock(wdev); |
| |
| kfree(ev); |
| |
| spin_lock_irqsave(&wdev->event_lock, flags); |
| } |
| spin_unlock_irqrestore(&wdev->event_lock, flags); |
| } |
| |
| void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) |
| { |
| struct wireless_dev *wdev; |
| |
| ASSERT_RTNL(); |
| ASSERT_RDEV_LOCK(rdev); |
| |
| mutex_lock(&rdev->devlist_mtx); |
| |
| list_for_each_entry(wdev, &rdev->wdev_list, list) |
| cfg80211_process_wdev_events(wdev); |
| |
| mutex_unlock(&rdev->devlist_mtx); |
| } |
| |
| int cfg80211_change_iface(struct cfg80211_registered_device *rdev, |
| struct net_device *dev, enum nl80211_iftype ntype, |
| u32 *flags, struct vif_params *params) |
| { |
| int err; |
| enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; |
| |
| ASSERT_RDEV_LOCK(rdev); |
| |
| /* don't support changing VLANs, you just re-create them */ |
| if (otype == NL80211_IFTYPE_AP_VLAN) |
| return -EOPNOTSUPP; |
| |
| /* cannot change into P2P device type */ |
| if (ntype == NL80211_IFTYPE_P2P_DEVICE) |
| return -EOPNOTSUPP; |
| |
| if (!rdev->ops->change_virtual_intf || |
| !(rdev->wiphy.interface_modes & (1 << ntype))) |
| return -EOPNOTSUPP; |
| |
| /* if it's part of a bridge, reject changing type to station/ibss */ |
| if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
| (ntype == NL80211_IFTYPE_ADHOC || |
| ntype == NL80211_IFTYPE_STATION || |
| ntype == NL80211_IFTYPE_P2P_CLIENT)) |
| return -EBUSY; |
| |
| if (ntype != otype && netif_running(dev)) { |
| mutex_lock(&rdev->devlist_mtx); |
| err = cfg80211_can_change_interface(rdev, dev->ieee80211_ptr, |
| ntype); |
| mutex_unlock(&rdev->devlist_mtx); |
| if (err) |
| return err; |
| |
| dev->ieee80211_ptr->use_4addr = false; |
| dev->ieee80211_ptr->mesh_id_up_len = 0; |
| |
| switch (otype) { |
| case NL80211_IFTYPE_AP: |
| cfg80211_stop_ap(rdev, dev); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| cfg80211_leave_ibss(rdev, dev, false); |
| break; |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_P2P_CLIENT: |
| cfg80211_disconnect(rdev, dev, |
| WLAN_REASON_DEAUTH_LEAVING, true); |
| break; |
| case NL80211_IFTYPE_MESH_POINT: |
| /* mesh should be handled? */ |
| break; |
| default: |
| break; |
| } |
| |
| cfg80211_process_rdev_events(rdev); |
| } |
| |
| err = rdev_change_virtual_intf(rdev, dev, ntype, flags, params); |
| |
| WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); |
| |
| if (!err && params && params->use_4addr != -1) |
| dev->ieee80211_ptr->use_4addr = params->use_4addr; |
| |
| if (!err) { |
| dev->priv_flags &= ~IFF_DONT_BRIDGE; |
| switch (ntype) { |
| case NL80211_IFTYPE_STATION: |
| if (dev->ieee80211_ptr->use_4addr) |
| break; |
| /* fall through */ |
| case NL80211_IFTYPE_P2P_CLIENT: |
| case NL80211_IFTYPE_ADHOC: |
| dev->priv_flags |= IFF_DONT_BRIDGE; |
| break; |
| case NL80211_IFTYPE_P2P_GO: |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_AP_VLAN: |
| case NL80211_IFTYPE_WDS: |
| case NL80211_IFTYPE_MESH_POINT: |
| /* bridging OK */ |
| break; |
| case NL80211_IFTYPE_MONITOR: |
| /* monitor can't bridge anyway */ |
| break; |
| case NL80211_IFTYPE_UNSPECIFIED: |
| case NUM_NL80211_IFTYPES: |
| /* not happening */ |
| break; |
| case NL80211_IFTYPE_P2P_DEVICE: |
| WARN_ON(1); |
| break; |
| } |
| } |
| |
| if (!err && ntype != otype && netif_running(dev)) { |
| cfg80211_update_iface_num(rdev, ntype, 1); |
| cfg80211_update_iface_num(rdev, otype, -1); |
| } |
| |
| return err; |
| } |
| |
| static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate) |
| { |
| static const u32 __mcs2bitrate[] = { |
| /* control PHY */ |
| [0] = 275, |
| /* SC PHY */ |
| [1] = 3850, |
| [2] = 7700, |
| [3] = 9625, |
| [4] = 11550, |
| [5] = 12512, /* 1251.25 mbps */ |
| [6] = 15400, |
| [7] = 19250, |
| [8] = 23100, |
| [9] = 25025, |
| [10] = 30800, |
| [11] = 38500, |
| [12] = 46200, |
| /* OFDM PHY */ |
| [13] = 6930, |
| [14] = 8662, /* 866.25 mbps */ |
| [15] = 13860, |
| [16] = 17325, |
| [17] = 20790, |
| [18] = 27720, |
| [19] = 34650, |
| [20] = 41580, |
| [21] = 45045, |
| [22] = 51975, |
| [23] = 62370, |
| [24] = 67568, /* 6756.75 mbps */ |
| /* LP-SC PHY */ |
| [25] = 6260, |
| [26] = 8340, |
| [27] = 11120, |
| [28] = 12510, |
| [29] = 16680, |
| [30] = 22240, |
| [31] = 25030, |
| }; |
| |
| if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) |
| return 0; |
| |
| return __mcs2bitrate[rate->mcs]; |
| } |
| |
| static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) |
| { |
| static const u32 base[4][10] = { |
| { 6500000, |
| 13000000, |
| 19500000, |
| 26000000, |
| 39000000, |
| 52000000, |
| 58500000, |
| 65000000, |
| 78000000, |
| 0, |
| }, |
| { 13500000, |
| 27000000, |
| 40500000, |
| 54000000, |
| 81000000, |
| 108000000, |
| 121500000, |
| 135000000, |
| 162000000, |
| 180000000, |
| }, |
| { 29300000, |
| 58500000, |
| 87800000, |
| 117000000, |
| 175500000, |
| 234000000, |
| 263300000, |
| 292500000, |
| 351000000, |
| 390000000, |
| }, |
| { 58500000, |
| 117000000, |
| 175500000, |
| 234000000, |
| 351000000, |
| 468000000, |
| 526500000, |
| 585000000, |
| 702000000, |
| 780000000, |
| }, |
| }; |
| u32 bitrate; |
| int idx; |
| |
| if (WARN_ON_ONCE(rate->mcs > 9)) |
| return 0; |
| |
| idx = rate->flags & (RATE_INFO_FLAGS_160_MHZ_WIDTH | |
| RATE_INFO_FLAGS_80P80_MHZ_WIDTH) ? 3 : |
| rate->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH ? 2 : |
| rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH ? 1 : 0; |
| |
| bitrate = base[idx][rate->mcs]; |
| bitrate *= rate->nss; |
| |
| if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) |
| bitrate = (bitrate / 9) * 10; |
| |
| /* do NOT round down here */ |
| return (bitrate + 50000) / 100000; |
| } |
| |
| u32 cfg80211_calculate_bitrate(struct rate_info *rate) |
| { |
| int modulation, streams, bitrate; |
| |
| if (!(rate->flags & RATE_INFO_FLAGS_MCS) && |
| !(rate->flags & RATE_INFO_FLAGS_VHT_MCS)) |
| return rate->legacy; |
| if (rate->flags & RATE_INFO_FLAGS_60G) |
| return cfg80211_calculate_bitrate_60g(rate); |
| if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) |
| return cfg80211_calculate_bitrate_vht(rate); |
| |
| /* the formula below does only work for MCS values smaller than 32 */ |
| if (WARN_ON_ONCE(rate->mcs >= 32)) |
| return 0; |
| |
| modulation = rate->mcs & 7; |
| streams = (rate->mcs >> 3) + 1; |
| |
| bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? |
| 13500000 : 6500000; |
| |
| if (modulation < 4) |
| bitrate *= (modulation + 1); |
| else if (modulation == 4) |
| bitrate *= (modulation + 2); |
| else |
| bitrate *= (modulation + 3); |
| |
| bitrate *= streams; |
| |
| if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) |
| bitrate = (bitrate / 9) * 10; |
| |
| /* do NOT round down here */ |
| return (bitrate + 50000) / 100000; |
| } |
| EXPORT_SYMBOL(cfg80211_calculate_bitrate); |
| |
| int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, |
| enum ieee80211_p2p_attr_id attr, |
| u8 *buf, unsigned int bufsize) |
| { |
| u8 *out = buf; |
| u16 attr_remaining = 0; |
| bool desired_attr = false; |
| u16 desired_len = 0; |
| |
| while (len > 0) { |
| unsigned int iedatalen; |
| unsigned int copy; |
| const u8 *iedata; |
| |
| if (len < 2) |
| return -EILSEQ; |
| iedatalen = ies[1]; |
| if (iedatalen + 2 > len) |
| return -EILSEQ; |
| |
| if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) |
| goto cont; |
| |
| if (iedatalen < 4) |
| goto cont; |
| |
| iedata = ies + 2; |
| |
| /* check WFA OUI, P2P subtype */ |
| if (iedata[0] != 0x50 || iedata[1] != 0x6f || |
| iedata[2] != 0x9a || iedata[3] != 0x09) |
| goto cont; |
| |
| iedatalen -= 4; |
| iedata += 4; |
| |
| /* check attribute continuation into this IE */ |
| copy = min_t(unsigned int, attr_remaining, iedatalen); |
| if (copy && desired_attr) { |
| desired_len += copy; |
| if (out) { |
| memcpy(out, iedata, min(bufsize, copy)); |
| out += min(bufsize, copy); |
| bufsize -= min(bufsize, copy); |
| } |
| |
| |
| if (copy == attr_remaining) |
| return desired_len; |
| } |
| |
| attr_remaining -= copy; |
| if (attr_remaining) |
| goto cont; |
| |
| iedatalen -= copy; |
| iedata += copy; |
| |
| while (iedatalen > 0) { |
| u16 attr_len; |
| |
| /* P2P attribute ID & size must fit */ |
| if (iedatalen < 3) |
| return -EILSEQ; |
| desired_attr = iedata[0] == attr; |
| attr_len = get_unaligned_le16(iedata + 1); |
| iedatalen -= 3; |
| iedata += 3; |
| |
| copy = min_t(unsigned int, attr_len, iedatalen); |
| |
| if (desired_attr) { |
| desired_len += copy; |
| if (out) { |
| memcpy(out, iedata, min(bufsize, copy)); |
| out += min(bufsize, copy); |
| bufsize -= min(bufsize, copy); |
| } |
| |
| if (copy == attr_len) |
| return desired_len; |
| } |
| |
| iedata += copy; |
| iedatalen -= copy; |
| attr_remaining = attr_len - copy; |
| } |
| |
| cont: |
| len -= ies[1] + 2; |
| ies += ies[1] + 2; |
| } |
| |
| if (attr_remaining && desired_attr) |
| return -EILSEQ; |
| |
| return -ENOENT; |
| } |
| EXPORT_SYMBOL(cfg80211_get_p2p_attr); |
| |
| bool ieee80211_operating_class_to_band(u8 operating_class, |
| enum ieee80211_band *band) |
| { |
| switch (operating_class) { |
| case 112: |
| case 115 ... 127: |
| *band = IEEE80211_BAND_5GHZ; |
| return true; |
| case 81: |
| case 82: |
| case 83: |
| case 84: |
| *band = IEEE80211_BAND_2GHZ; |
| return true; |
| } |
| |
| return false; |
| } |
| EXPORT_SYMBOL(ieee80211_operating_class_to_band); |
| |
| int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, |
| u32 beacon_int) |
| { |
| struct wireless_dev *wdev; |
| int res = 0; |
| |
| if (!beacon_int) |
| return -EINVAL; |
| |
| mutex_lock(&rdev->devlist_mtx); |
| |
| list_for_each_entry(wdev, &rdev->wdev_list, list) { |
| if (!wdev->beacon_interval) |
| continue; |
| if (wdev->beacon_interval != beacon_int) { |
| res = -EINVAL; |
| break; |
| } |
| } |
| |
| mutex_unlock(&rdev->devlist_mtx); |
| |
| return res; |
| } |
| |
| int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, |
| struct wireless_dev *wdev, |
| enum nl80211_iftype iftype, |
| struct ieee80211_channel *chan, |
| enum cfg80211_chan_mode chanmode, |
| u8 radar_detect) |
| { |
| struct wireless_dev *wdev_iter; |
| u32 used_iftypes = BIT(iftype); |
| int num[NUM_NL80211_IFTYPES]; |
| struct ieee80211_channel |
| *used_channels[CFG80211_MAX_NUM_DIFFERENT_CHANNELS]; |
| struct ieee80211_channel *ch; |
| enum cfg80211_chan_mode chmode; |
| int num_different_channels = 0; |
| int total = 1; |
| bool radar_required; |
| int i, j; |
| |
| ASSERT_RTNL(); |
| lockdep_assert_held(&rdev->devlist_mtx); |
| |
| if (WARN_ON(hweight32(radar_detect) > 1)) |
| return -EINVAL; |
| |
| switch (iftype) { |
| case NL80211_IFTYPE_ADHOC: |
| case NL80211_IFTYPE_AP: |
| case NL80211_IFTYPE_AP_VLAN: |
| case NL80211_IFTYPE_MESH_POINT: |
| case NL80211_IFTYPE_P2P_GO: |
| case NL80211_IFTYPE_WDS: |
| radar_required = !!(chan && |
| (chan->flags & IEEE80211_CHAN_RADAR)); |
| break; |
| case NL80211_IFTYPE_P2P_CLIENT: |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_P2P_DEVICE: |
| case NL80211_IFTYPE_MONITOR: |
| radar_required = false; |
| break; |
| case NUM_NL80211_IFTYPES: |
| case NL80211_IFTYPE_UNSPECIFIED: |
| default: |
| return -EINVAL; |
| } |
| |
| if (radar_required && !radar_detect) |
| return -EINVAL; |
| |
| /* Always allow software iftypes */ |
| if (rdev->wiphy.software_iftypes & BIT(iftype)) { |
| if (radar_detect) |
| return -EINVAL; |
| return 0; |
| } |
| |
| memset(num, 0, sizeof(num)); |
| memset(used_channels, 0, sizeof(used_channels)); |
| |
| num[iftype] = 1; |
| |
| switch (chanmode) { |
| case CHAN_MODE_UNDEFINED: |
| break; |
| case CHAN_MODE_SHARED: |
| WARN_ON(!chan); |
| used_channels[0] = chan; |
| num_different_channels++; |
| break; |
| case CHAN_MODE_EXCLUSIVE: |
| num_different_channels++; |
| break; |
| } |
| |
| list_for_each_entry(wdev_iter, &rdev->wdev_list, list) { |
| if (wdev_iter == wdev) |
| continue; |
| if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) { |
| if (!wdev_iter->p2p_started) |
| continue; |
| } else if (wdev_iter->netdev) { |
| if (!netif_running(wdev_iter->netdev)) |
| continue; |
| } else { |
| WARN_ON(1); |
| } |
| |
| if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype)) |
| continue; |
| |
| /* |
| * We may be holding the "wdev" mutex, but now need to lock |
| * wdev_iter. This is OK because once we get here wdev_iter |
| * is not wdev (tested above), but we need to use the nested |
| * locking for lockdep. |
| */ |
| mutex_lock_nested(&wdev_iter->mtx, 1); |
| __acquire(wdev_iter->mtx); |
| cfg80211_get_chan_state(wdev_iter, &ch, &chmode); |
| wdev_unlock(wdev_iter); |
| |
| switch (chmode) { |
| case CHAN_MODE_UNDEFINED: |
| break; |
| case CHAN_MODE_SHARED: |
| for (i = 0; i < CFG80211_MAX_NUM_DIFFERENT_CHANNELS; i++) |
| if (!used_channels[i] || used_channels[i] == ch) |
| break; |
| |
| if (i == CFG80211_MAX_NUM_DIFFERENT_CHANNELS) |
| return -EBUSY; |
| |
| if (used_channels[i] == NULL) { |
| used_channels[i] = ch; |
| num_different_channels++; |
| } |
| break; |
| case CHAN_MODE_EXCLUSIVE: |
| num_different_channels++; |
| break; |
| } |
| |
| num[wdev_iter->iftype]++; |
| total++; |
| used_iftypes |= BIT(wdev_iter->iftype); |
| } |
| |
| if (total == 1 && !radar_detect) |
| return 0; |
| |
| for (i = 0; i < rdev->wiphy.n_iface_combinations; i++) { |
| const struct ieee80211_iface_combination *c; |
| struct ieee80211_iface_limit *limits; |
| u32 all_iftypes = 0; |
| |
| c = &rdev->wiphy.iface_combinations[i]; |
| |
| if (total > c->max_interfaces) |
| continue; |
| if (num_different_channels > c->num_different_channels) |
| continue; |
| |
| limits = kmemdup(c->limits, sizeof(limits[0]) * c->n_limits, |
| GFP_KERNEL); |
| if (!limits) |
| return -ENOMEM; |
| |
| for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { |
| if (rdev->wiphy.software_iftypes & BIT(iftype)) |
| continue; |
| for (j = 0; j < c->n_limits; j++) { |
| all_iftypes |= limits[j].types; |
| if (!(limits[j].types & BIT(iftype))) |
| continue; |
| if (limits[j].max < num[iftype]) |
| goto cont; |
| limits[j].max -= num[iftype]; |
| } |
| } |
| |
| if (radar_detect && !(c->radar_detect_widths & radar_detect)) |
| goto cont; |
| |
| /* |
| * Finally check that all iftypes that we're currently |
| * using are actually part of this combination. If they |
| * aren't then we can't use this combination and have |
| * to continue to the next. |
| */ |
| if ((all_iftypes & used_iftypes) != used_iftypes) |
| goto cont; |
| |
| /* |
| * This combination covered all interface types and |
| * supported the requested numbers, so we're good. |
| */ |
| kfree(limits); |
| return 0; |
| cont: |
| kfree(limits); |
| } |
| |
| return -EBUSY; |
| } |
| |
| int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, |
| const u8 *rates, unsigned int n_rates, |
| u32 *mask) |
| { |
| int i, j; |
| |
| if (!sband) |
| return -EINVAL; |
| |
| if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) |
| return -EINVAL; |
| |
| *mask = 0; |
| |
| for (i = 0; i < n_rates; i++) { |
| int rate = (rates[i] & 0x7f) * 5; |
| bool found = false; |
| |
| for (j = 0; j < sband->n_bitrates; j++) { |
| if (sband->bitrates[j].bitrate == rate) { |
| found = true; |
| *mask |= BIT(j); |
| break; |
| } |
| } |
| if (!found) |
| return -EINVAL; |
| } |
| |
| /* |
| * mask must have at least one bit set here since we |
| * didn't accept a 0-length rates array nor allowed |
| * entries in the array that didn't exist |
| */ |
| |
| return 0; |
| } |
| |
| /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
| /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
| const unsigned char rfc1042_header[] __aligned(2) = |
| { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
| EXPORT_SYMBOL(rfc1042_header); |
| |
| /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
| const unsigned char bridge_tunnel_header[] __aligned(2) = |
| { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
| EXPORT_SYMBOL(bridge_tunnel_header); |