| // SPDX-License-Identifier: GPL-2.0 |
| /* IEEE 802.11 SoftMAC layer |
| * Copyright (c) 2005 Andrea Merello <andrea.merello@gmail.com> |
| * |
| * Mostly extracted from the rtl8180-sa2400 driver for the |
| * in-kernel generic ieee802.11 stack. |
| * |
| * Few lines might be stolen from other part of the rtllib |
| * stack. Copyright who own it's copyright |
| * |
| * WPA code stolen from the ipw2200 driver. |
| * Copyright who own it's copyright. |
| */ |
| #include "rtllib.h" |
| |
| #include <linux/random.h> |
| #include <linux/delay.h> |
| #include <linux/uaccess.h> |
| #include <linux/etherdevice.h> |
| #include <linux/ieee80211.h> |
| |
| static void rtllib_sta_wakeup(struct rtllib_device *ieee, short nl); |
| |
| static short rtllib_is_54g(struct rtllib_network *net) |
| { |
| return (net->rates_ex_len > 0) || (net->rates_len > 4); |
| } |
| |
| /* returns the total length needed for placing the RATE MFIE |
| * tag and the EXTENDED RATE MFIE tag if needed. |
| * It encludes two bytes per tag for the tag itself and its len |
| */ |
| static unsigned int rtllib_MFIE_rate_len(struct rtllib_device *ieee) |
| { |
| unsigned int rate_len = 0; |
| |
| rate_len = RTLLIB_CCK_RATE_LEN + 2; |
| rate_len += RTLLIB_OFDM_RATE_LEN + 2; |
| |
| return rate_len; |
| } |
| |
| /* place the MFIE rate, tag to the memory (double) pointed. |
| * Then it updates the pointer so that |
| * it points after the new MFIE tag added. |
| */ |
| static void rtllib_mfie_brate(struct rtllib_device *ieee, u8 **tag_p) |
| { |
| u8 *tag = *tag_p; |
| |
| *tag++ = MFIE_TYPE_RATES; |
| *tag++ = 4; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_1MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_2MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_5MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_11MB; |
| |
| /* We may add an option for custom rates that specific HW |
| * might support |
| */ |
| *tag_p = tag; |
| } |
| |
| static void rtllib_mfie_grate(struct rtllib_device *ieee, u8 **tag_p) |
| { |
| u8 *tag = *tag_p; |
| |
| *tag++ = MFIE_TYPE_RATES_EX; |
| *tag++ = 8; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_6MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_9MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_12MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_18MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_24MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_36MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_48MB; |
| *tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_54MB; |
| |
| /* We may add an option for custom rates that specific HW might |
| * support |
| */ |
| *tag_p = tag; |
| } |
| |
| static void rtllib_wmm_info(struct rtllib_device *ieee, u8 **tag_p) |
| { |
| u8 *tag = *tag_p; |
| |
| *tag++ = MFIE_TYPE_GENERIC; |
| *tag++ = 7; |
| *tag++ = 0x00; |
| *tag++ = 0x50; |
| *tag++ = 0xf2; |
| *tag++ = 0x02; |
| *tag++ = 0x00; |
| *tag++ = 0x01; |
| *tag++ = MAX_SP_Len; |
| *tag_p = tag; |
| } |
| |
| static void rtllib_turbo_info(struct rtllib_device *ieee, u8 **tag_p) |
| { |
| u8 *tag = *tag_p; |
| |
| *tag++ = MFIE_TYPE_GENERIC; |
| *tag++ = 7; |
| *tag++ = 0x00; |
| *tag++ = 0xe0; |
| *tag++ = 0x4c; |
| *tag++ = 0x01; |
| *tag++ = 0x02; |
| *tag++ = 0x11; |
| *tag++ = 0x00; |
| |
| *tag_p = tag; |
| netdev_alert(ieee->dev, "This is enable turbo mode IE process\n"); |
| } |
| |
| static void enqueue_mgmt(struct rtllib_device *ieee, struct sk_buff *skb) |
| { |
| int nh; |
| |
| nh = (ieee->mgmt_queue_head + 1) % MGMT_QUEUE_NUM; |
| |
| /* if the queue is full but we have newer frames then |
| * just overwrites the oldest. |
| * |
| * if (nh == ieee->mgmt_queue_tail) |
| * return -1; |
| */ |
| ieee->mgmt_queue_head = nh; |
| ieee->mgmt_queue_ring[nh] = skb; |
| } |
| |
| static void init_mgmt_queue(struct rtllib_device *ieee) |
| { |
| ieee->mgmt_queue_tail = 0; |
| ieee->mgmt_queue_head = 0; |
| } |
| |
| u8 mgnt_query_tx_rate_exclude_cck_rates(struct rtllib_device *ieee) |
| { |
| u16 i; |
| u8 query_rate = 0; |
| u8 basic_rate; |
| |
| for (i = 0; i < ieee->current_network.rates_len; i++) { |
| basic_rate = ieee->current_network.rates[i] & 0x7F; |
| if (!rtllib_is_cck_rate(basic_rate)) { |
| if (query_rate == 0) { |
| query_rate = basic_rate; |
| } else { |
| if (basic_rate < query_rate) |
| query_rate = basic_rate; |
| } |
| } |
| } |
| |
| if (query_rate == 0) { |
| query_rate = 12; |
| netdev_info(ieee->dev, "No basic_rate found!!\n"); |
| } |
| return query_rate; |
| } |
| |
| static u8 mgnt_query_mgnt_frame_tx_rate(struct rtllib_device *ieee) |
| { |
| struct rt_hi_throughput *ht_info = ieee->ht_info; |
| u8 rate; |
| |
| if (ht_info->iot_action & HT_IOT_ACT_MGNT_USE_CCK_6M) |
| rate = 0x0c; |
| else |
| rate = ieee->basic_rate & 0x7f; |
| |
| if (rate == 0) |
| rate = 0x02; |
| |
| return rate; |
| } |
| |
| inline void softmac_mgmt_xmit(struct sk_buff *skb, struct rtllib_device *ieee) |
| { |
| unsigned long flags; |
| short single = ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE; |
| struct ieee80211_hdr_3addr *header = |
| (struct ieee80211_hdr_3addr *)skb->data; |
| |
| struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + 8); |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| /* called with 2nd param 0, no mgmt lock required */ |
| rtllib_sta_wakeup(ieee, 0); |
| |
| if (ieee80211_is_beacon(header->frame_control)) |
| tcb_desc->queue_index = BEACON_QUEUE; |
| else |
| tcb_desc->queue_index = MGNT_QUEUE; |
| |
| if (ieee->disable_mgnt_queue) |
| tcb_desc->queue_index = HIGH_QUEUE; |
| |
| tcb_desc->data_rate = mgnt_query_mgnt_frame_tx_rate(ieee); |
| tcb_desc->ratr_index = 7; |
| tcb_desc->tx_dis_rate_fallback = 1; |
| tcb_desc->tx_use_drv_assinged_rate = 1; |
| if (single) { |
| if (ieee->queue_stop) { |
| enqueue_mgmt(ieee, skb); |
| } else { |
| header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4); |
| |
| if (ieee->seq_ctrl[0] == 0xFFF) |
| ieee->seq_ctrl[0] = 0; |
| else |
| ieee->seq_ctrl[0]++; |
| |
| /* avoid watchdog triggers */ |
| ieee->softmac_data_hard_start_xmit(skb, ieee->dev, |
| ieee->basic_rate); |
| } |
| |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } else { |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| spin_lock_irqsave(&ieee->mgmt_tx_lock, flags); |
| |
| header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4); |
| |
| if (ieee->seq_ctrl[0] == 0xFFF) |
| ieee->seq_ctrl[0] = 0; |
| else |
| ieee->seq_ctrl[0]++; |
| |
| /* check whether the managed packet queued greater than 5 */ |
| if (!ieee->check_nic_enough_desc(ieee->dev, |
| tcb_desc->queue_index) || |
| skb_queue_len(&ieee->skb_waitq[tcb_desc->queue_index]) || |
| ieee->queue_stop) { |
| /* insert the skb packet to the management queue |
| * |
| * as for the completion function, it does not need |
| * to check it any more. |
| */ |
| netdev_info(ieee->dev, |
| "%s():insert to waitqueue, queue_index:%d!\n", |
| __func__, tcb_desc->queue_index); |
| skb_queue_tail(&ieee->skb_waitq[tcb_desc->queue_index], |
| skb); |
| } else { |
| ieee->softmac_hard_start_xmit(skb, ieee->dev); |
| } |
| spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags); |
| } |
| } |
| |
| static inline void |
| softmac_ps_mgmt_xmit(struct sk_buff *skb, |
| struct rtllib_device *ieee) |
| { |
| short single = ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE; |
| struct ieee80211_hdr_3addr *header = |
| (struct ieee80211_hdr_3addr *)skb->data; |
| u16 fc, type, stype; |
| struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + 8); |
| |
| fc = le16_to_cpu(header->frame_control); |
| type = WLAN_FC_GET_TYPE(fc); |
| stype = WLAN_FC_GET_STYPE(fc); |
| |
| if (stype != IEEE80211_STYPE_PSPOLL) |
| tcb_desc->queue_index = MGNT_QUEUE; |
| else |
| tcb_desc->queue_index = HIGH_QUEUE; |
| |
| if (ieee->disable_mgnt_queue) |
| tcb_desc->queue_index = HIGH_QUEUE; |
| |
| tcb_desc->data_rate = mgnt_query_mgnt_frame_tx_rate(ieee); |
| tcb_desc->ratr_index = 7; |
| tcb_desc->tx_dis_rate_fallback = 1; |
| tcb_desc->tx_use_drv_assinged_rate = 1; |
| if (single) { |
| if (type != RTLLIB_FTYPE_CTL) { |
| header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4); |
| |
| if (ieee->seq_ctrl[0] == 0xFFF) |
| ieee->seq_ctrl[0] = 0; |
| else |
| ieee->seq_ctrl[0]++; |
| } |
| /* avoid watchdog triggers */ |
| ieee->softmac_data_hard_start_xmit(skb, ieee->dev, |
| ieee->basic_rate); |
| |
| } else { |
| if (type != RTLLIB_FTYPE_CTL) { |
| header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4); |
| |
| if (ieee->seq_ctrl[0] == 0xFFF) |
| ieee->seq_ctrl[0] = 0; |
| else |
| ieee->seq_ctrl[0]++; |
| } |
| ieee->softmac_hard_start_xmit(skb, ieee->dev); |
| } |
| } |
| |
| static inline struct sk_buff *rtllib_probe_req(struct rtllib_device *ieee) |
| { |
| unsigned int len, rate_len; |
| u8 *tag; |
| struct sk_buff *skb; |
| struct rtllib_probe_request *req; |
| |
| len = ieee->current_network.ssid_len; |
| |
| rate_len = rtllib_MFIE_rate_len(ieee); |
| |
| skb = dev_alloc_skb(sizeof(struct rtllib_probe_request) + |
| 2 + len + rate_len + ieee->tx_headroom); |
| |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, ieee->tx_headroom); |
| |
| req = skb_put(skb, sizeof(struct rtllib_probe_request)); |
| req->header.frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); |
| req->header.duration_id = 0; |
| |
| eth_broadcast_addr(req->header.addr1); |
| ether_addr_copy(req->header.addr2, ieee->dev->dev_addr); |
| eth_broadcast_addr(req->header.addr3); |
| |
| tag = skb_put(skb, len + 2 + rate_len); |
| |
| *tag++ = MFIE_TYPE_SSID; |
| *tag++ = len; |
| memcpy(tag, ieee->current_network.ssid, len); |
| tag += len; |
| |
| rtllib_mfie_brate(ieee, &tag); |
| rtllib_mfie_grate(ieee, &tag); |
| |
| return skb; |
| } |
| |
| /* Enables network monitor mode, all rx packets will be received. */ |
| void rtllib_enable_net_monitor_mode(struct net_device *dev, |
| bool init_state) |
| { |
| struct rtllib_device *ieee = netdev_priv_rsl(dev); |
| |
| netdev_info(dev, "========>Enter Monitor Mode\n"); |
| |
| ieee->allow_all_dest_addr_handler(dev, true, !init_state); |
| } |
| |
| /* Disables network monitor mode. Only packets destinated to |
| * us will be received. |
| */ |
| void rtllib_disable_net_monitor_mode(struct net_device *dev, bool init_state) |
| { |
| struct rtllib_device *ieee = netdev_priv_rsl(dev); |
| |
| netdev_info(dev, "========>Exit Monitor Mode\n"); |
| |
| ieee->allow_all_dest_addr_handler(dev, false, !init_state); |
| } |
| |
| static void rtllib_send_probe(struct rtllib_device *ieee) |
| { |
| struct sk_buff *skb; |
| |
| skb = rtllib_probe_req(ieee); |
| if (skb) { |
| softmac_mgmt_xmit(skb, ieee); |
| ieee->softmac_stats.tx_probe_rq++; |
| } |
| } |
| |
| static void rtllib_send_probe_requests(struct rtllib_device *ieee) |
| { |
| if (ieee->softmac_features & IEEE_SOFTMAC_PROBERQ) { |
| rtllib_send_probe(ieee); |
| rtllib_send_probe(ieee); |
| } |
| } |
| |
| /* this performs syncro scan blocking the caller until all channels |
| * in the allowed channel map has been checked. |
| */ |
| static void rtllib_softmac_scan_syncro(struct rtllib_device *ieee) |
| { |
| union iwreq_data wrqu; |
| short ch = 0; |
| |
| ieee->be_scan_inprogress = true; |
| |
| mutex_lock(&ieee->scan_mutex); |
| |
| while (1) { |
| do { |
| ch++; |
| if (ch > MAX_CHANNEL_NUMBER) |
| goto out; /* scan completed */ |
| } while (!ieee->active_channel_map[ch]); |
| |
| /* this function can be called in two situations |
| * 1- We have switched to ad-hoc mode and we are |
| * performing a complete syncro scan before conclude |
| * there are no interesting cell and to create a |
| * new one. In this case the link state is |
| * MAC80211_NOLINK until we found an interesting cell. |
| * If so the ieee8021_new_net, called by the RX path |
| * will set the state to MAC80211_LINKED, so we stop |
| * scanning |
| * 2- We are linked and the root uses run iwlist scan. |
| * So we switch to MAC80211_LINKED_SCANNING to remember |
| * that we are still logically linked (not interested in |
| * new network events, despite for updating the net list, |
| * but we are temporarly 'unlinked' as the driver shall |
| * not filter RX frames and the channel is changing. |
| * So the only situation in which are interested is to check |
| * if the state become LINKED because of the #1 situation |
| */ |
| |
| if (ieee->link_state == MAC80211_LINKED) |
| goto out; |
| if (ieee->sync_scan_hurryup) { |
| netdev_info(ieee->dev, |
| "============>sync_scan_hurryup out\n"); |
| goto out; |
| } |
| |
| ieee->set_chan(ieee->dev, ch); |
| if (ieee->active_channel_map[ch] == 1) |
| rtllib_send_probe_requests(ieee); |
| |
| /* this prevent excessive time wait when we |
| * need to wait for a syncro scan to end.. |
| */ |
| msleep_interruptible_rsl(RTLLIB_SOFTMAC_SCAN_TIME); |
| } |
| out: |
| ieee->actscanning = false; |
| ieee->sync_scan_hurryup = 0; |
| |
| mutex_unlock(&ieee->scan_mutex); |
| |
| ieee->be_scan_inprogress = false; |
| |
| memset(&wrqu, 0, sizeof(wrqu)); |
| wireless_send_event(ieee->dev, SIOCGIWSCAN, &wrqu, NULL); |
| } |
| |
| static void rtllib_softmac_scan_wq(void *data) |
| { |
| struct rtllib_device *ieee = container_of_dwork_rsl(data, |
| struct rtllib_device, softmac_scan_wq); |
| u8 last_channel = ieee->current_network.channel; |
| |
| if (!ieee->ieee_up) |
| return; |
| if (rtllib_act_scanning(ieee, true)) |
| return; |
| |
| mutex_lock(&ieee->scan_mutex); |
| |
| if (ieee->rf_power_state == rf_off) { |
| netdev_info(ieee->dev, |
| "======>%s():rf state is rf_off, return\n", |
| __func__); |
| goto out1; |
| } |
| |
| do { |
| ieee->current_network.channel = |
| (ieee->current_network.channel + 1) % |
| MAX_CHANNEL_NUMBER; |
| if (ieee->scan_watch_dog++ > MAX_CHANNEL_NUMBER) { |
| if (!ieee->active_channel_map[ieee->current_network.channel]) |
| ieee->current_network.channel = 6; |
| goto out; /* no good chans */ |
| } |
| } while (!ieee->active_channel_map[ieee->current_network.channel]); |
| |
| if (ieee->scanning_continue == 0) |
| goto out; |
| |
| ieee->set_chan(ieee->dev, ieee->current_network.channel); |
| |
| if (ieee->active_channel_map[ieee->current_network.channel] == 1) |
| rtllib_send_probe_requests(ieee); |
| |
| schedule_delayed_work(&ieee->softmac_scan_wq, |
| msecs_to_jiffies(RTLLIB_SOFTMAC_SCAN_TIME)); |
| |
| mutex_unlock(&ieee->scan_mutex); |
| return; |
| |
| out: |
| ieee->current_network.channel = last_channel; |
| |
| out1: |
| ieee->actscanning = false; |
| ieee->scan_watch_dog = 0; |
| ieee->scanning_continue = 0; |
| mutex_unlock(&ieee->scan_mutex); |
| } |
| |
| static void rtllib_softmac_stop_scan(struct rtllib_device *ieee) |
| { |
| mutex_lock(&ieee->scan_mutex); |
| ieee->scan_watch_dog = 0; |
| if (ieee->scanning_continue == 1) { |
| ieee->scanning_continue = 0; |
| ieee->actscanning = false; |
| mutex_unlock(&ieee->scan_mutex); |
| cancel_delayed_work_sync(&ieee->softmac_scan_wq); |
| } else { |
| mutex_unlock(&ieee->scan_mutex); |
| } |
| } |
| |
| void rtllib_stop_scan(struct rtllib_device *ieee) |
| { |
| if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) |
| rtllib_softmac_stop_scan(ieee); |
| } |
| EXPORT_SYMBOL(rtllib_stop_scan); |
| |
| void rtllib_stop_scan_syncro(struct rtllib_device *ieee) |
| { |
| if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) |
| ieee->sync_scan_hurryup = 1; |
| } |
| EXPORT_SYMBOL(rtllib_stop_scan_syncro); |
| |
| bool rtllib_act_scanning(struct rtllib_device *ieee, bool sync_scan) |
| { |
| if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) { |
| if (sync_scan) |
| return ieee->be_scan_inprogress; |
| else |
| return ieee->actscanning || ieee->be_scan_inprogress; |
| } else { |
| return test_bit(STATUS_SCANNING, &ieee->status); |
| } |
| } |
| EXPORT_SYMBOL(rtllib_act_scanning); |
| |
| /* called with ieee->lock held */ |
| static void rtllib_start_scan(struct rtllib_device *ieee) |
| { |
| ieee->rtllib_ips_leave_wq(ieee->dev); |
| |
| if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) { |
| if (ieee->scanning_continue == 0) { |
| ieee->actscanning = true; |
| ieee->scanning_continue = 1; |
| schedule_delayed_work(&ieee->softmac_scan_wq, 0); |
| } |
| } |
| } |
| |
| /* called with wx_mutex held */ |
| void rtllib_start_scan_syncro(struct rtllib_device *ieee) |
| { |
| ieee->sync_scan_hurryup = 0; |
| if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) |
| rtllib_softmac_scan_syncro(ieee); |
| } |
| EXPORT_SYMBOL(rtllib_start_scan_syncro); |
| |
| static inline struct sk_buff * |
| rtllib_authentication_req(struct rtllib_network *beacon, |
| struct rtllib_device *ieee, |
| int challengelen, u8 *daddr) |
| { |
| struct sk_buff *skb; |
| struct rtllib_authentication *auth; |
| int len; |
| |
| len = sizeof(struct rtllib_authentication) + challengelen + |
| ieee->tx_headroom + 4; |
| skb = dev_alloc_skb(len); |
| |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, ieee->tx_headroom); |
| |
| auth = skb_put(skb, sizeof(struct rtllib_authentication)); |
| |
| auth->header.frame_control = cpu_to_le16(IEEE80211_STYPE_AUTH); |
| if (challengelen) |
| auth->header.frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| |
| auth->header.duration_id = cpu_to_le16(0x013a); |
| ether_addr_copy(auth->header.addr1, beacon->bssid); |
| ether_addr_copy(auth->header.addr2, ieee->dev->dev_addr); |
| ether_addr_copy(auth->header.addr3, beacon->bssid); |
| if (ieee->auth_mode == 0) |
| auth->algorithm = WLAN_AUTH_OPEN; |
| else if (ieee->auth_mode == 1) |
| auth->algorithm = cpu_to_le16(WLAN_AUTH_SHARED_KEY); |
| else if (ieee->auth_mode == 2) |
| auth->algorithm = WLAN_AUTH_OPEN; |
| auth->transaction = cpu_to_le16(ieee->associate_seq); |
| ieee->associate_seq++; |
| |
| auth->status = cpu_to_le16(WLAN_STATUS_SUCCESS); |
| |
| return skb; |
| } |
| |
| static struct sk_buff *rtllib_null_func(struct rtllib_device *ieee, short pwr) |
| { |
| struct sk_buff *skb; |
| struct ieee80211_hdr_3addr *hdr; |
| |
| skb = dev_alloc_skb(sizeof(struct ieee80211_hdr_3addr) + ieee->tx_headroom); |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, ieee->tx_headroom); |
| |
| hdr = skb_put(skb, sizeof(struct ieee80211_hdr_3addr)); |
| |
| ether_addr_copy(hdr->addr1, ieee->current_network.bssid); |
| ether_addr_copy(hdr->addr2, ieee->dev->dev_addr); |
| ether_addr_copy(hdr->addr3, ieee->current_network.bssid); |
| |
| hdr->frame_control = cpu_to_le16(RTLLIB_FTYPE_DATA | |
| IEEE80211_STYPE_NULLFUNC | IEEE80211_FCTL_TODS | |
| (pwr ? IEEE80211_FCTL_PM : 0)); |
| |
| return skb; |
| } |
| |
| static struct sk_buff *rtllib_pspoll_func(struct rtllib_device *ieee) |
| { |
| struct sk_buff *skb; |
| struct ieee80211_pspoll *hdr; |
| |
| skb = dev_alloc_skb(sizeof(struct ieee80211_pspoll) + ieee->tx_headroom); |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, ieee->tx_headroom); |
| |
| hdr = skb_put(skb, sizeof(struct ieee80211_pspoll)); |
| |
| ether_addr_copy(hdr->bssid, ieee->current_network.bssid); |
| ether_addr_copy(hdr->ta, ieee->dev->dev_addr); |
| |
| hdr->aid = cpu_to_le16(ieee->assoc_id | 0xc000); |
| hdr->frame_control = cpu_to_le16(RTLLIB_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | |
| IEEE80211_FCTL_PM); |
| |
| return skb; |
| } |
| |
| static inline int sec_is_in_pmkid_list(struct rtllib_device *ieee, u8 *bssid) |
| { |
| int i = 0; |
| |
| do { |
| if ((ieee->pmkid_list[i].used) && |
| (memcmp(ieee->pmkid_list[i].bssid, bssid, ETH_ALEN) == 0)) |
| break; |
| i++; |
| } while (i < NUM_PMKID_CACHE); |
| |
| if (i == NUM_PMKID_CACHE) |
| i = -1; |
| return i; |
| } |
| |
| static inline struct sk_buff * |
| rtllib_association_req(struct rtllib_network *beacon, |
| struct rtllib_device *ieee) |
| { |
| struct sk_buff *skb; |
| struct rtllib_assoc_request_frame *hdr; |
| u8 *tag, *ies; |
| int i; |
| u8 *ht_cap_buf = NULL; |
| u8 ht_cap_len = 0; |
| u8 *realtek_ie_buf = NULL; |
| u8 realtek_ie_len = 0; |
| int wpa_ie_len = ieee->wpa_ie_len; |
| int wps_ie_len = ieee->wps_ie_len; |
| unsigned int ckip_ie_len = 0; |
| unsigned int ccxrm_ie_len = 0; |
| unsigned int cxvernum_ie_len = 0; |
| struct lib80211_crypt_data *crypt; |
| int encrypt; |
| int pmk_cache_idx; |
| |
| unsigned int rate_len = (beacon->rates_len ? |
| (beacon->rates_len + 2) : 0) + |
| (beacon->rates_ex_len ? (beacon->rates_ex_len) + |
| 2 : 0); |
| |
| unsigned int wmm_info_len = beacon->qos_data.supported ? 9 : 0; |
| unsigned int turbo_info_len = beacon->turbo_enable ? 9 : 0; |
| |
| int len = 0; |
| |
| crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx]; |
| if (crypt) |
| encrypt = crypt && crypt->ops && |
| ((strcmp(crypt->ops->name, "R-WEP") == 0 || |
| wpa_ie_len)); |
| else |
| encrypt = 0; |
| |
| if ((ieee->rtllib_ap_sec_type && |
| (ieee->rtllib_ap_sec_type(ieee) & SEC_ALG_TKIP)) || |
| ieee->forced_bg_mode) { |
| ieee->ht_info->enable_ht = 0; |
| ieee->mode = WIRELESS_MODE_G; |
| } |
| |
| if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) { |
| ht_cap_buf = (u8 *)&ieee->ht_info->self_ht_cap; |
| ht_cap_len = sizeof(ieee->ht_info->self_ht_cap); |
| ht_construct_capability_element(ieee, ht_cap_buf, &ht_cap_len, |
| encrypt, true); |
| if (ieee->ht_info->current_rt2rt_aggregation) { |
| realtek_ie_buf = ieee->ht_info->sz_rt2rt_agg_buf; |
| realtek_ie_len = |
| sizeof(ieee->ht_info->sz_rt2rt_agg_buf); |
| ht_construct_rt2rt_agg_element(ieee, realtek_ie_buf, |
| &realtek_ie_len); |
| } |
| } |
| |
| if (beacon->ckip_supported) |
| ckip_ie_len = 30 + 2; |
| if (beacon->ccx_rm_enable) |
| ccxrm_ie_len = 6 + 2; |
| if (beacon->bss_ccx_ver_number >= 2) |
| cxvernum_ie_len = 5 + 2; |
| |
| pmk_cache_idx = sec_is_in_pmkid_list(ieee, ieee->current_network.bssid); |
| if (pmk_cache_idx >= 0) { |
| wpa_ie_len += 18; |
| netdev_info(ieee->dev, "[PMK cache]: WPA2 IE length: %x\n", |
| wpa_ie_len); |
| } |
| len = sizeof(struct rtllib_assoc_request_frame) + 2 |
| + beacon->ssid_len |
| + rate_len |
| + wpa_ie_len |
| + wps_ie_len |
| + wmm_info_len |
| + turbo_info_len |
| + ht_cap_len |
| + realtek_ie_len |
| + ckip_ie_len |
| + ccxrm_ie_len |
| + cxvernum_ie_len |
| + ieee->tx_headroom; |
| |
| skb = dev_alloc_skb(len); |
| |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, ieee->tx_headroom); |
| |
| hdr = skb_put(skb, sizeof(struct rtllib_assoc_request_frame) + 2); |
| |
| hdr->header.frame_control = cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ); |
| hdr->header.duration_id = cpu_to_le16(37); |
| ether_addr_copy(hdr->header.addr1, beacon->bssid); |
| ether_addr_copy(hdr->header.addr2, ieee->dev->dev_addr); |
| ether_addr_copy(hdr->header.addr3, beacon->bssid); |
| |
| ether_addr_copy(ieee->ap_mac_addr, beacon->bssid); |
| |
| hdr->capability = cpu_to_le16(WLAN_CAPABILITY_ESS); |
| if (beacon->capability & WLAN_CAPABILITY_PRIVACY) |
| hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY); |
| |
| if (beacon->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) |
| hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE); |
| |
| if (beacon->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) |
| hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME); |
| |
| hdr->listen_interval = cpu_to_le16(beacon->listen_interval); |
| |
| hdr->info_element[0].id = MFIE_TYPE_SSID; |
| |
| hdr->info_element[0].len = beacon->ssid_len; |
| skb_put_data(skb, beacon->ssid, beacon->ssid_len); |
| |
| tag = skb_put(skb, rate_len); |
| |
| if (beacon->rates_len) { |
| *tag++ = MFIE_TYPE_RATES; |
| *tag++ = beacon->rates_len; |
| for (i = 0; i < beacon->rates_len; i++) |
| *tag++ = beacon->rates[i]; |
| } |
| |
| if (beacon->rates_ex_len) { |
| *tag++ = MFIE_TYPE_RATES_EX; |
| *tag++ = beacon->rates_ex_len; |
| for (i = 0; i < beacon->rates_ex_len; i++) |
| *tag++ = beacon->rates_ex[i]; |
| } |
| |
| if (beacon->ckip_supported) { |
| static const u8 aironet_ie_oui[] = {0x00, 0x01, 0x66}; |
| u8 ccx_aironet_buf[30]; |
| struct octet_string os_ccx_aironet_ie; |
| |
| memset(ccx_aironet_buf, 0, 30); |
| os_ccx_aironet_ie.octet = ccx_aironet_buf; |
| os_ccx_aironet_ie.Length = sizeof(ccx_aironet_buf); |
| memcpy(os_ccx_aironet_ie.octet, aironet_ie_oui, |
| sizeof(aironet_ie_oui)); |
| |
| os_ccx_aironet_ie.octet[IE_CISCO_FLAG_POSITION] |= |
| (SUPPORT_CKIP_PK | SUPPORT_CKIP_MIC); |
| tag = skb_put(skb, ckip_ie_len); |
| *tag++ = MFIE_TYPE_AIRONET; |
| *tag++ = os_ccx_aironet_ie.Length; |
| memcpy(tag, os_ccx_aironet_ie.octet, os_ccx_aironet_ie.Length); |
| tag += os_ccx_aironet_ie.Length; |
| } |
| |
| if (beacon->ccx_rm_enable) { |
| static const u8 ccx_rm_cap_buf[] = {0x00, 0x40, 0x96, 0x01, 0x01, |
| 0x00}; |
| struct octet_string os_ccx_rm_cap; |
| |
| os_ccx_rm_cap.octet = (u8 *)ccx_rm_cap_buf; |
| os_ccx_rm_cap.Length = sizeof(ccx_rm_cap_buf); |
| tag = skb_put(skb, ccxrm_ie_len); |
| *tag++ = MFIE_TYPE_GENERIC; |
| *tag++ = os_ccx_rm_cap.Length; |
| memcpy(tag, os_ccx_rm_cap.octet, os_ccx_rm_cap.Length); |
| tag += os_ccx_rm_cap.Length; |
| } |
| |
| if (beacon->bss_ccx_ver_number >= 2) { |
| u8 ccx_ver_num_buf[] = {0x00, 0x40, 0x96, 0x03, 0x00}; |
| struct octet_string os_ccx_ver_num; |
| |
| ccx_ver_num_buf[4] = beacon->bss_ccx_ver_number; |
| os_ccx_ver_num.octet = ccx_ver_num_buf; |
| os_ccx_ver_num.Length = sizeof(ccx_ver_num_buf); |
| tag = skb_put(skb, cxvernum_ie_len); |
| *tag++ = MFIE_TYPE_GENERIC; |
| *tag++ = os_ccx_ver_num.Length; |
| memcpy(tag, os_ccx_ver_num.octet, os_ccx_ver_num.Length); |
| tag += os_ccx_ver_num.Length; |
| } |
| if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) { |
| if (ieee->ht_info->peer_ht_spec_ver != HT_SPEC_VER_EWC) { |
| tag = skb_put(skb, ht_cap_len); |
| *tag++ = MFIE_TYPE_HT_CAP; |
| *tag++ = ht_cap_len - 2; |
| memcpy(tag, ht_cap_buf, ht_cap_len - 2); |
| tag += ht_cap_len - 2; |
| } |
| } |
| |
| if (wpa_ie_len) { |
| skb_put_data(skb, ieee->wpa_ie, ieee->wpa_ie_len); |
| |
| if (pmk_cache_idx >= 0) { |
| tag = skb_put(skb, 18); |
| *tag = 1; |
| *(tag + 1) = 0; |
| memcpy((tag + 2), &ieee->pmkid_list[pmk_cache_idx].PMKID, |
| 16); |
| } |
| } |
| if (wmm_info_len) { |
| tag = skb_put(skb, wmm_info_len); |
| rtllib_wmm_info(ieee, &tag); |
| } |
| |
| if (wps_ie_len && ieee->wps_ie) |
| skb_put_data(skb, ieee->wps_ie, wps_ie_len); |
| |
| if (turbo_info_len) { |
| tag = skb_put(skb, turbo_info_len); |
| rtllib_turbo_info(ieee, &tag); |
| } |
| |
| if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) { |
| if (ieee->ht_info->peer_ht_spec_ver == HT_SPEC_VER_EWC) { |
| tag = skb_put(skb, ht_cap_len); |
| *tag++ = MFIE_TYPE_GENERIC; |
| *tag++ = ht_cap_len - 2; |
| memcpy(tag, ht_cap_buf, ht_cap_len - 2); |
| tag += ht_cap_len - 2; |
| } |
| |
| if (ieee->ht_info->current_rt2rt_aggregation) { |
| tag = skb_put(skb, realtek_ie_len); |
| *tag++ = MFIE_TYPE_GENERIC; |
| *tag++ = realtek_ie_len - 2; |
| memcpy(tag, realtek_ie_buf, realtek_ie_len - 2); |
| } |
| } |
| |
| kfree(ieee->assocreq_ies); |
| ieee->assocreq_ies = NULL; |
| ies = &hdr->info_element[0].id; |
| ieee->assocreq_ies_len = (skb->data + skb->len) - ies; |
| ieee->assocreq_ies = kmemdup(ies, ieee->assocreq_ies_len, GFP_ATOMIC); |
| if (!ieee->assocreq_ies) |
| ieee->assocreq_ies_len = 0; |
| |
| return skb; |
| } |
| |
| static void rtllib_associate_abort(struct rtllib_device *ieee) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| ieee->associate_seq++; |
| |
| /* don't scan, and avoid to have the RX path possibily |
| * try again to associate. Even do not react to AUTH or |
| * ASSOC response. Just wait for the retry wq to be scheduled. |
| * Here we will check if there are good nets to associate |
| * with, so we retry or just get back to NO_LINK and scanning |
| */ |
| if (ieee->link_state == RTLLIB_ASSOCIATING_AUTHENTICATING) { |
| netdev_dbg(ieee->dev, "Authentication failed\n"); |
| ieee->softmac_stats.no_auth_rs++; |
| } else { |
| netdev_dbg(ieee->dev, "Association failed\n"); |
| ieee->softmac_stats.no_ass_rs++; |
| } |
| |
| ieee->link_state = RTLLIB_ASSOCIATING_RETRY; |
| |
| schedule_delayed_work(&ieee->associate_retry_wq, |
| RTLLIB_SOFTMAC_ASSOC_RETRY_TIME); |
| |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } |
| |
| static void rtllib_associate_abort_cb(struct timer_list *t) |
| { |
| struct rtllib_device *dev = from_timer(dev, t, associate_timer); |
| |
| rtllib_associate_abort(dev); |
| } |
| |
| static void rtllib_associate_step1(struct rtllib_device *ieee, u8 *daddr) |
| { |
| struct rtllib_network *beacon = &ieee->current_network; |
| struct sk_buff *skb; |
| |
| netdev_dbg(ieee->dev, "Stopping scan\n"); |
| |
| ieee->softmac_stats.tx_auth_rq++; |
| |
| skb = rtllib_authentication_req(beacon, ieee, 0, daddr); |
| |
| if (!skb) { |
| rtllib_associate_abort(ieee); |
| } else { |
| ieee->link_state = RTLLIB_ASSOCIATING_AUTHENTICATING; |
| netdev_dbg(ieee->dev, "Sending authentication request\n"); |
| softmac_mgmt_xmit(skb, ieee); |
| if (!timer_pending(&ieee->associate_timer)) { |
| ieee->associate_timer.expires = jiffies + (HZ / 2); |
| add_timer(&ieee->associate_timer); |
| } |
| } |
| } |
| |
| static void rtllib_auth_challenge(struct rtllib_device *ieee, u8 *challenge, |
| int chlen) |
| { |
| u8 *c; |
| struct sk_buff *skb; |
| struct rtllib_network *beacon = &ieee->current_network; |
| |
| ieee->associate_seq++; |
| ieee->softmac_stats.tx_auth_rq++; |
| |
| skb = rtllib_authentication_req(beacon, ieee, chlen + 2, beacon->bssid); |
| |
| if (!skb) { |
| rtllib_associate_abort(ieee); |
| } else { |
| c = skb_put(skb, chlen + 2); |
| *(c++) = MFIE_TYPE_CHALLENGE; |
| *(c++) = chlen; |
| memcpy(c, challenge, chlen); |
| |
| netdev_dbg(ieee->dev, |
| "Sending authentication challenge response\n"); |
| |
| rtllib_encrypt_fragment(ieee, skb, |
| sizeof(struct ieee80211_hdr_3addr)); |
| |
| softmac_mgmt_xmit(skb, ieee); |
| mod_timer(&ieee->associate_timer, jiffies + (HZ / 2)); |
| } |
| kfree(challenge); |
| } |
| |
| static void rtllib_associate_step2(struct rtllib_device *ieee) |
| { |
| struct sk_buff *skb; |
| struct rtllib_network *beacon = &ieee->current_network; |
| |
| del_timer_sync(&ieee->associate_timer); |
| |
| netdev_dbg(ieee->dev, "Sending association request\n"); |
| |
| ieee->softmac_stats.tx_ass_rq++; |
| skb = rtllib_association_req(beacon, ieee); |
| if (!skb) { |
| rtllib_associate_abort(ieee); |
| } else { |
| softmac_mgmt_xmit(skb, ieee); |
| mod_timer(&ieee->associate_timer, jiffies + (HZ / 2)); |
| } |
| } |
| |
| static void rtllib_associate_complete_wq(void *data) |
| { |
| struct rtllib_device *ieee = (struct rtllib_device *) |
| container_of(data, |
| struct rtllib_device, |
| associate_complete_wq); |
| struct rt_pwr_save_ctrl *psc = &ieee->pwr_save_ctrl; |
| |
| netdev_info(ieee->dev, "Associated successfully with %pM\n", |
| ieee->current_network.bssid); |
| netdev_info(ieee->dev, "normal associate\n"); |
| notify_wx_assoc_event(ieee); |
| |
| netif_carrier_on(ieee->dev); |
| ieee->is_roaming = false; |
| if (rtllib_is_54g(&ieee->current_network)) { |
| ieee->rate = 108; |
| netdev_info(ieee->dev, "Using G rates:%d\n", ieee->rate); |
| } else { |
| ieee->rate = 22; |
| ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_B); |
| netdev_info(ieee->dev, "Using B rates:%d\n", ieee->rate); |
| } |
| if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) { |
| netdev_info(ieee->dev, "Successfully associated, ht enabled\n"); |
| ht_on_assoc_rsp(ieee); |
| } else { |
| netdev_info(ieee->dev, |
| "Successfully associated, ht not enabled(%d, %d)\n", |
| ieee->ht_info->current_ht_support, |
| ieee->ht_info->enable_ht); |
| memset(ieee->dot11ht_oper_rate_set, 0, 16); |
| } |
| ieee->link_detect_info.slot_num = 2 * (1 + |
| ieee->current_network.beacon_interval / |
| 500); |
| if (ieee->link_detect_info.num_recv_bcn_in_period == 0 || |
| ieee->link_detect_info.num_recv_data_in_period == 0) { |
| ieee->link_detect_info.num_recv_bcn_in_period = 1; |
| ieee->link_detect_info.num_recv_data_in_period = 1; |
| } |
| psc->lps_idle_count = 0; |
| ieee->link_change(ieee->dev); |
| } |
| |
| static void rtllib_sta_send_associnfo(struct rtllib_device *ieee) |
| { |
| } |
| |
| static void rtllib_associate_complete(struct rtllib_device *ieee) |
| { |
| del_timer_sync(&ieee->associate_timer); |
| |
| ieee->link_state = MAC80211_LINKED; |
| rtllib_sta_send_associnfo(ieee); |
| |
| schedule_work(&ieee->associate_complete_wq); |
| } |
| |
| static void rtllib_associate_procedure_wq(void *data) |
| { |
| struct rtllib_device *ieee = container_of_dwork_rsl(data, |
| struct rtllib_device, |
| associate_procedure_wq); |
| rtllib_stop_scan_syncro(ieee); |
| ieee->rtllib_ips_leave(ieee->dev); |
| mutex_lock(&ieee->wx_mutex); |
| |
| rtllib_stop_scan(ieee); |
| ht_set_connect_bw_mode(ieee, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT); |
| if (ieee->rf_power_state == rf_off) { |
| ieee->rtllib_ips_leave_wq(ieee->dev); |
| mutex_unlock(&ieee->wx_mutex); |
| return; |
| } |
| ieee->associate_seq = 1; |
| |
| rtllib_associate_step1(ieee, ieee->current_network.bssid); |
| |
| mutex_unlock(&ieee->wx_mutex); |
| } |
| |
| inline void rtllib_softmac_new_net(struct rtllib_device *ieee, |
| struct rtllib_network *net) |
| { |
| u8 tmp_ssid[IW_ESSID_MAX_SIZE + 1]; |
| int tmp_ssid_len = 0; |
| |
| short apset, ssidset, ssidbroad, apmatch, ssidmatch; |
| |
| /* we are interested in new only if we are not associated |
| * and we are not associating / authenticating |
| */ |
| if (ieee->link_state != MAC80211_NOLINK) |
| return; |
| |
| if ((ieee->iw_mode == IW_MODE_INFRA) && !(net->capability & |
| WLAN_CAPABILITY_ESS)) |
| return; |
| |
| if (ieee->iw_mode == IW_MODE_INFRA) { |
| /* if the user specified the AP MAC, we need also the essid |
| * This could be obtained by beacons or, if the network does not |
| * broadcast it, it can be put manually. |
| */ |
| apset = ieee->wap_set; |
| ssidset = ieee->ssid_set; |
| ssidbroad = !(net->ssid_len == 0 || net->ssid[0] == '\0'); |
| apmatch = (memcmp(ieee->current_network.bssid, net->bssid, |
| ETH_ALEN) == 0); |
| if (!ssidbroad) { |
| ssidmatch = (ieee->current_network.ssid_len == |
| net->hidden_ssid_len) && |
| (!strncmp(ieee->current_network.ssid, |
| net->hidden_ssid, net->hidden_ssid_len)); |
| if (net->hidden_ssid_len > 0) { |
| strncpy(net->ssid, net->hidden_ssid, |
| net->hidden_ssid_len); |
| net->ssid_len = net->hidden_ssid_len; |
| ssidbroad = 1; |
| } |
| } else { |
| ssidmatch = |
| (ieee->current_network.ssid_len == net->ssid_len) && |
| (!strncmp(ieee->current_network.ssid, net->ssid, |
| net->ssid_len)); |
| } |
| |
| /* if the user set the AP check if match. |
| * if the network does not broadcast essid we check the |
| * user supplied ANY essid |
| * if the network does broadcast and the user does not set |
| * essid it is OK |
| * if the network does broadcast and the user did set essid |
| * check if essid match |
| * if the ap is not set, check that the user set the bssid |
| * and the network does broadcast and that those two bssid match |
| */ |
| if ((apset && apmatch && |
| ((ssidset && ssidbroad && ssidmatch) || |
| (ssidbroad && !ssidset) || (!ssidbroad && ssidset))) || |
| (!apset && ssidset && ssidbroad && ssidmatch) || |
| (ieee->is_roaming && ssidset && ssidbroad && ssidmatch)) { |
| /* Save the essid so that if it is hidden, it is |
| * replaced with the essid provided by the user. |
| */ |
| if (!ssidbroad) { |
| memcpy(tmp_ssid, ieee->current_network.ssid, |
| ieee->current_network.ssid_len); |
| tmp_ssid_len = ieee->current_network.ssid_len; |
| } |
| memcpy(&ieee->current_network, net, |
| sizeof(ieee->current_network)); |
| if (!ssidbroad) { |
| memcpy(ieee->current_network.ssid, tmp_ssid, |
| tmp_ssid_len); |
| ieee->current_network.ssid_len = tmp_ssid_len; |
| } |
| netdev_info(ieee->dev, |
| "Linking with %s,channel:%d, qos:%d, myHT:%d, networkHT:%d, mode:%x cur_net.flags:0x%x\n", |
| ieee->current_network.ssid, |
| ieee->current_network.channel, |
| ieee->current_network.qos_data.supported, |
| ieee->ht_info->enable_ht, |
| ieee->current_network.bssht.bd_support_ht, |
| ieee->current_network.mode, |
| ieee->current_network.flags); |
| |
| if ((rtllib_act_scanning(ieee, false)) && |
| !(ieee->softmac_features & IEEE_SOFTMAC_SCAN)) |
| rtllib_stop_scan_syncro(ieee); |
| |
| ht_reset_iot_setting(ieee->ht_info); |
| ieee->wmm_acm = 0; |
| if (ieee->iw_mode == IW_MODE_INFRA) { |
| /* Join the network for the first time */ |
| ieee->asoc_retry_count = 0; |
| if ((ieee->current_network.qos_data.supported == 1) && |
| ieee->current_network.bssht.bd_support_ht) |
| ht_reset_self_and_save_peer_setting(ieee, |
| &ieee->current_network); |
| else |
| ieee->ht_info->current_ht_support = false; |
| |
| ieee->link_state = RTLLIB_ASSOCIATING; |
| schedule_delayed_work(&ieee->associate_procedure_wq, 0); |
| } else { |
| if (rtllib_is_54g(&ieee->current_network)) { |
| ieee->rate = 108; |
| ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_G); |
| netdev_info(ieee->dev, |
| "Using G rates\n"); |
| } else { |
| ieee->rate = 22; |
| ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_B); |
| netdev_info(ieee->dev, |
| "Using B rates\n"); |
| } |
| memset(ieee->dot11ht_oper_rate_set, 0, 16); |
| ieee->link_state = MAC80211_LINKED; |
| } |
| } |
| } |
| } |
| |
| static void rtllib_softmac_check_all_nets(struct rtllib_device *ieee) |
| { |
| unsigned long flags; |
| struct rtllib_network *target; |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| list_for_each_entry(target, &ieee->network_list, list) { |
| /* if the state become different that NOLINK means |
| * we had found what we are searching for |
| */ |
| |
| if (ieee->link_state != MAC80211_NOLINK) |
| break; |
| |
| if (ieee->scan_age == 0 || time_after(target->last_scanned + |
| ieee->scan_age, jiffies)) |
| rtllib_softmac_new_net(ieee, target); |
| } |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } |
| |
| static inline int auth_parse(struct net_device *dev, struct sk_buff *skb, |
| u8 **challenge, int *chlen) |
| { |
| struct rtllib_authentication *a; |
| u8 *t; |
| |
| if (skb->len < (sizeof(struct rtllib_authentication) - |
| sizeof(struct rtllib_info_element))) { |
| netdev_dbg(dev, "invalid len in auth resp: %d\n", skb->len); |
| return -EINVAL; |
| } |
| *challenge = NULL; |
| a = (struct rtllib_authentication *)skb->data; |
| if (skb->len > (sizeof(struct rtllib_authentication) + 3)) { |
| t = skb->data + sizeof(struct rtllib_authentication); |
| |
| if (*(t++) == MFIE_TYPE_CHALLENGE) { |
| *chlen = *(t++); |
| *challenge = kmemdup(t, *chlen, GFP_ATOMIC); |
| if (!*challenge) |
| return -ENOMEM; |
| } |
| } |
| |
| if (a->status) { |
| netdev_dbg(dev, "auth_parse() failed\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static inline u16 assoc_parse(struct rtllib_device *ieee, struct sk_buff *skb, |
| int *aid) |
| { |
| struct rtllib_assoc_response_frame *response_head; |
| u16 status_code; |
| |
| if (skb->len < sizeof(struct rtllib_assoc_response_frame)) { |
| netdev_dbg(ieee->dev, "Invalid len in auth resp: %d\n", |
| skb->len); |
| return 0xcafe; |
| } |
| |
| response_head = (struct rtllib_assoc_response_frame *)skb->data; |
| *aid = le16_to_cpu(response_head->aid) & 0x3fff; |
| |
| status_code = le16_to_cpu(response_head->status); |
| if ((status_code == WLAN_STATUS_ASSOC_DENIED_RATES || |
| status_code == WLAN_STATUS_CAPS_UNSUPPORTED) && |
| ((ieee->mode == WIRELESS_MODE_G) && |
| (ieee->current_network.mode == WIRELESS_MODE_N_24G) && |
| (ieee->asoc_retry_count++ < (RT_ASOC_RETRY_LIMIT - 1)))) { |
| ieee->ht_info->iot_action |= HT_IOT_ACT_PURE_N_MODE; |
| } else { |
| ieee->asoc_retry_count = 0; |
| } |
| |
| return le16_to_cpu(response_head->status); |
| } |
| |
| void rtllib_sta_ps_send_null_frame(struct rtllib_device *ieee, short pwr) |
| { |
| struct sk_buff *buf = rtllib_null_func(ieee, pwr); |
| |
| if (buf) |
| softmac_ps_mgmt_xmit(buf, ieee); |
| } |
| EXPORT_SYMBOL(rtllib_sta_ps_send_null_frame); |
| |
| void rtllib_sta_ps_send_pspoll_frame(struct rtllib_device *ieee) |
| { |
| struct sk_buff *buf = rtllib_pspoll_func(ieee); |
| |
| if (buf) |
| softmac_ps_mgmt_xmit(buf, ieee); |
| } |
| |
| static short rtllib_sta_ps_sleep(struct rtllib_device *ieee, u64 *time) |
| { |
| int timeout; |
| u8 dtim; |
| struct rt_pwr_save_ctrl *psc = &ieee->pwr_save_ctrl; |
| |
| if (ieee->lps_delay_cnt) { |
| ieee->lps_delay_cnt--; |
| return 0; |
| } |
| |
| dtim = ieee->current_network.dtim_data; |
| if (!(dtim & RTLLIB_DTIM_VALID)) |
| return 0; |
| timeout = ieee->current_network.beacon_interval; |
| ieee->current_network.dtim_data = RTLLIB_DTIM_INVALID; |
| /* there's no need to nofity AP that I find you buffered |
| * with broadcast packet |
| */ |
| if (dtim & (RTLLIB_DTIM_UCAST & ieee->ps)) |
| return 2; |
| |
| if (!time_after(jiffies, |
| dev_trans_start(ieee->dev) + msecs_to_jiffies(timeout))) |
| return 0; |
| if (!time_after(jiffies, |
| ieee->last_rx_ps_time + msecs_to_jiffies(timeout))) |
| return 0; |
| if ((ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE) && |
| (ieee->mgmt_queue_tail != ieee->mgmt_queue_head)) |
| return 0; |
| |
| if (time) { |
| if (ieee->awake_pkt_sent) { |
| psc->lps_awake_intvl = 1; |
| } else { |
| u8 max_period = 5; |
| |
| if (psc->lps_awake_intvl == 0) |
| psc->lps_awake_intvl = 1; |
| psc->lps_awake_intvl = (psc->lps_awake_intvl >= |
| max_period) ? max_period : |
| (psc->lps_awake_intvl + 1); |
| } |
| { |
| u8 lps_awake_intvl_tmp = 0; |
| u8 period = ieee->current_network.dtim_period; |
| u8 count = ieee->current_network.tim.tim_count; |
| |
| if (count == 0) { |
| if (psc->lps_awake_intvl > period) |
| lps_awake_intvl_tmp = period + |
| (psc->lps_awake_intvl - |
| period) - |
| ((psc->lps_awake_intvl - period) % |
| period); |
| else |
| lps_awake_intvl_tmp = psc->lps_awake_intvl; |
| |
| } else { |
| if (psc->lps_awake_intvl > |
| ieee->current_network.tim.tim_count) |
| lps_awake_intvl_tmp = count + |
| (psc->lps_awake_intvl - count) - |
| ((psc->lps_awake_intvl - count) % period); |
| else |
| lps_awake_intvl_tmp = psc->lps_awake_intvl; |
| } |
| |
| *time = ieee->current_network.last_dtim_sta_time |
| + msecs_to_jiffies(ieee->current_network.beacon_interval * |
| lps_awake_intvl_tmp); |
| } |
| } |
| |
| return 1; |
| } |
| |
| static inline void rtllib_sta_ps(struct work_struct *work) |
| { |
| struct rtllib_device *ieee; |
| u64 time; |
| short sleep; |
| unsigned long flags, flags2; |
| |
| ieee = container_of(work, struct rtllib_device, ps_task); |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| if ((ieee->ps == RTLLIB_PS_DISABLED || |
| ieee->iw_mode != IW_MODE_INFRA || |
| ieee->link_state != MAC80211_LINKED)) { |
| spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2); |
| rtllib_sta_wakeup(ieee, 1); |
| |
| spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2); |
| } |
| sleep = rtllib_sta_ps_sleep(ieee, &time); |
| /* 2 wake, 1 sleep, 0 do nothing */ |
| if (sleep == 0) |
| goto out; |
| if (sleep == 1) { |
| if (ieee->sta_sleep == LPS_IS_SLEEP) { |
| ieee->enter_sleep_state(ieee->dev, time); |
| } else if (ieee->sta_sleep == LPS_IS_WAKE) { |
| spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2); |
| |
| if (ieee->ps_is_queue_empty(ieee->dev)) { |
| ieee->sta_sleep = LPS_WAIT_NULL_DATA_SEND; |
| ieee->ack_tx_to_ieee = 1; |
| rtllib_sta_ps_send_null_frame(ieee, 1); |
| ieee->ps_time = time; |
| } |
| spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2); |
| } |
| |
| ieee->awake_pkt_sent = false; |
| |
| } else if (sleep == 2) { |
| spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2); |
| |
| rtllib_sta_wakeup(ieee, 1); |
| |
| spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2); |
| } |
| |
| out: |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } |
| |
| static void rtllib_sta_wakeup(struct rtllib_device *ieee, short nl) |
| { |
| if (ieee->sta_sleep == LPS_IS_WAKE) { |
| if (nl) { |
| if (ieee->ht_info->iot_action & |
| HT_IOT_ACT_NULL_DATA_POWER_SAVING) { |
| ieee->ack_tx_to_ieee = 1; |
| rtllib_sta_ps_send_null_frame(ieee, 0); |
| } else { |
| ieee->ack_tx_to_ieee = 1; |
| rtllib_sta_ps_send_pspoll_frame(ieee); |
| } |
| } |
| return; |
| } |
| |
| if (ieee->sta_sleep == LPS_IS_SLEEP) |
| ieee->sta_wake_up(ieee->dev); |
| if (nl) { |
| if (ieee->ht_info->iot_action & |
| HT_IOT_ACT_NULL_DATA_POWER_SAVING) { |
| ieee->ack_tx_to_ieee = 1; |
| rtllib_sta_ps_send_null_frame(ieee, 0); |
| } else { |
| ieee->ack_tx_to_ieee = 1; |
| ieee->polling = true; |
| rtllib_sta_ps_send_pspoll_frame(ieee); |
| } |
| |
| } else { |
| ieee->sta_sleep = LPS_IS_WAKE; |
| ieee->polling = false; |
| } |
| } |
| |
| void rtllib_ps_tx_ack(struct rtllib_device *ieee, short success) |
| { |
| unsigned long flags, flags2; |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| if (ieee->sta_sleep == LPS_WAIT_NULL_DATA_SEND) { |
| /* Null frame with PS bit set */ |
| if (success) { |
| ieee->sta_sleep = LPS_IS_SLEEP; |
| ieee->enter_sleep_state(ieee->dev, ieee->ps_time); |
| } |
| /* if the card report not success we can't be sure the AP |
| * has not RXed so we can't assume the AP believe us awake |
| */ |
| } else {/* 21112005 - tx again null without PS bit if lost */ |
| |
| if ((ieee->sta_sleep == LPS_IS_WAKE) && !success) { |
| spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2); |
| if (ieee->ht_info->iot_action & |
| HT_IOT_ACT_NULL_DATA_POWER_SAVING) |
| rtllib_sta_ps_send_null_frame(ieee, 0); |
| else |
| rtllib_sta_ps_send_pspoll_frame(ieee); |
| spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2); |
| } |
| } |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } |
| EXPORT_SYMBOL(rtllib_ps_tx_ack); |
| |
| static void rtllib_process_action(struct rtllib_device *ieee, |
| struct sk_buff *skb) |
| { |
| u8 *act = skb->data + RTLLIB_3ADDR_LEN; |
| u8 category = 0; |
| |
| category = *act; |
| act++; |
| switch (category) { |
| case ACT_CAT_BA: |
| switch (*act) { |
| case ACT_ADDBAREQ: |
| rtllib_rx_add_ba_req(ieee, skb); |
| break; |
| case ACT_ADDBARSP: |
| rtllib_rx_add_ba_rsp(ieee, skb); |
| break; |
| case ACT_DELBA: |
| rtllib_rx_DELBA(ieee, skb); |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static inline int |
| rtllib_rx_assoc_resp(struct rtllib_device *ieee, struct sk_buff *skb, |
| struct rtllib_rx_stats *rx_stats) |
| { |
| u16 errcode; |
| int aid; |
| u8 *ies; |
| struct rtllib_assoc_response_frame *assoc_resp; |
| struct ieee80211_hdr_3addr *header = (struct ieee80211_hdr_3addr *)skb->data; |
| u16 frame_ctl = le16_to_cpu(header->frame_control); |
| |
| netdev_dbg(ieee->dev, "received [RE]ASSOCIATION RESPONSE (%d)\n", |
| WLAN_FC_GET_STYPE(frame_ctl)); |
| |
| if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) && |
| ieee->link_state == RTLLIB_ASSOCIATING_AUTHENTICATED && |
| (ieee->iw_mode == IW_MODE_INFRA)) { |
| errcode = assoc_parse(ieee, skb, &aid); |
| if (!errcode) { |
| struct rtllib_network *network = |
| kzalloc(sizeof(struct rtllib_network), |
| GFP_ATOMIC); |
| |
| if (!network) |
| return 1; |
| ieee->link_state = MAC80211_LINKED; |
| ieee->assoc_id = aid; |
| ieee->softmac_stats.rx_ass_ok++; |
| /* station support qos */ |
| /* Let the register setting default with Legacy station */ |
| assoc_resp = (struct rtllib_assoc_response_frame *)skb->data; |
| if (ieee->current_network.qos_data.supported == 1) { |
| if (rtllib_parse_info_param(ieee, assoc_resp->info_element, |
| rx_stats->len - sizeof(*assoc_resp), |
| network, rx_stats)) { |
| kfree(network); |
| return 1; |
| } |
| memcpy(ieee->ht_info->peer_ht_cap_buf, |
| network->bssht.bd_ht_cap_buf, |
| network->bssht.bd_ht_cap_len); |
| memcpy(ieee->ht_info->peer_ht_info_buf, |
| network->bssht.bd_ht_info_buf, |
| network->bssht.bd_ht_info_len); |
| ieee->handle_assoc_response(ieee->dev, |
| (struct rtllib_assoc_response_frame *)header, network); |
| } |
| kfree(network); |
| |
| kfree(ieee->assocresp_ies); |
| ieee->assocresp_ies = NULL; |
| ies = &assoc_resp->info_element[0].id; |
| ieee->assocresp_ies_len = (skb->data + skb->len) - ies; |
| ieee->assocresp_ies = kmemdup(ies, |
| ieee->assocresp_ies_len, |
| GFP_ATOMIC); |
| if (!ieee->assocresp_ies) |
| ieee->assocresp_ies_len = 0; |
| |
| rtllib_associate_complete(ieee); |
| } else { |
| /* aid could not been allocated */ |
| ieee->softmac_stats.rx_ass_err++; |
| netdev_info(ieee->dev, |
| "Association response status code 0x%x\n", |
| errcode); |
| if (ieee->asoc_retry_count < RT_ASOC_RETRY_LIMIT) |
| schedule_delayed_work(&ieee->associate_procedure_wq, 0); |
| else |
| rtllib_associate_abort(ieee); |
| } |
| } |
| return 0; |
| } |
| |
| static void rtllib_rx_auth_resp(struct rtllib_device *ieee, struct sk_buff *skb) |
| { |
| int errcode; |
| u8 *challenge; |
| int chlen = 0; |
| bool support_nmode = true, half_support_nmode = false; |
| |
| errcode = auth_parse(ieee->dev, skb, &challenge, &chlen); |
| |
| if (errcode) { |
| ieee->softmac_stats.rx_auth_rs_err++; |
| netdev_info(ieee->dev, |
| "Authentication response status code %d", errcode); |
| rtllib_associate_abort(ieee); |
| return; |
| } |
| |
| if (ieee->open_wep || !challenge) { |
| ieee->link_state = RTLLIB_ASSOCIATING_AUTHENTICATED; |
| ieee->softmac_stats.rx_auth_rs_ok++; |
| if (!(ieee->ht_info->iot_action & HT_IOT_ACT_PURE_N_MODE)) { |
| if (!ieee->get_nmode_support_by_sec_cfg(ieee->dev)) { |
| if (is_ht_half_nmode_aps(ieee)) { |
| support_nmode = true; |
| half_support_nmode = true; |
| } else { |
| support_nmode = false; |
| half_support_nmode = false; |
| } |
| } |
| } |
| /* Dummy wirless mode setting to avoid encryption issue */ |
| if (support_nmode) { |
| ieee->set_wireless_mode(ieee->dev, |
| ieee->current_network.mode); |
| } else { |
| /*TODO*/ |
| ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_G); |
| } |
| |
| if ((ieee->current_network.mode == WIRELESS_MODE_N_24G) && |
| half_support_nmode) { |
| netdev_info(ieee->dev, "======>enter half N mode\n"); |
| ieee->half_wireless_n24g_mode = true; |
| } else { |
| ieee->half_wireless_n24g_mode = false; |
| } |
| rtllib_associate_step2(ieee); |
| } else { |
| rtllib_auth_challenge(ieee, challenge, chlen); |
| } |
| } |
| |
| static inline int |
| rtllib_rx_auth(struct rtllib_device *ieee, struct sk_buff *skb, |
| struct rtllib_rx_stats *rx_stats) |
| { |
| if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) { |
| if (ieee->link_state == RTLLIB_ASSOCIATING_AUTHENTICATING && |
| (ieee->iw_mode == IW_MODE_INFRA)) { |
| netdev_dbg(ieee->dev, |
| "Received authentication response"); |
| rtllib_rx_auth_resp(ieee, skb); |
| } |
| } |
| return 0; |
| } |
| |
| static inline int |
| rtllib_rx_deauth(struct rtllib_device *ieee, struct sk_buff *skb) |
| { |
| struct ieee80211_hdr_3addr *header = (struct ieee80211_hdr_3addr *)skb->data; |
| u16 frame_ctl; |
| |
| if (memcmp(header->addr3, ieee->current_network.bssid, ETH_ALEN) != 0) |
| return 0; |
| |
| /* FIXME for now repeat all the association procedure |
| * both for disassociation and deauthentication |
| */ |
| if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) && |
| ieee->link_state == MAC80211_LINKED && |
| (ieee->iw_mode == IW_MODE_INFRA)) { |
| frame_ctl = le16_to_cpu(header->frame_control); |
| netdev_info(ieee->dev, |
| "==========>received disassoc/deauth(%x) frame, reason code:%x\n", |
| WLAN_FC_GET_STYPE(frame_ctl), |
| ((struct rtllib_disassoc *)skb->data)->reason); |
| ieee->link_state = RTLLIB_ASSOCIATING; |
| ieee->softmac_stats.reassoc++; |
| ieee->is_roaming = true; |
| ieee->link_detect_info.busy_traffic = false; |
| rtllib_disassociate(ieee); |
| remove_peer_ts(ieee, header->addr2); |
| if (!(ieee->rtllib_ap_sec_type(ieee) & (SEC_ALG_CCMP | SEC_ALG_TKIP))) |
| schedule_delayed_work(&ieee->associate_procedure_wq, 5); |
| } |
| return 0; |
| } |
| |
| inline int rtllib_rx_frame_softmac(struct rtllib_device *ieee, |
| struct sk_buff *skb, |
| struct rtllib_rx_stats *rx_stats, u16 type, |
| u16 stype) |
| { |
| struct ieee80211_hdr_3addr *header = (struct ieee80211_hdr_3addr *)skb->data; |
| u16 frame_ctl; |
| |
| if (!ieee->proto_started) |
| return 0; |
| |
| frame_ctl = le16_to_cpu(header->frame_control); |
| switch (WLAN_FC_GET_STYPE(frame_ctl)) { |
| case IEEE80211_STYPE_ASSOC_RESP: |
| case IEEE80211_STYPE_REASSOC_RESP: |
| if (rtllib_rx_assoc_resp(ieee, skb, rx_stats) == 1) |
| return 1; |
| break; |
| case IEEE80211_STYPE_ASSOC_REQ: |
| case IEEE80211_STYPE_REASSOC_REQ: |
| break; |
| case IEEE80211_STYPE_AUTH: |
| rtllib_rx_auth(ieee, skb, rx_stats); |
| break; |
| case IEEE80211_STYPE_DISASSOC: |
| case IEEE80211_STYPE_DEAUTH: |
| rtllib_rx_deauth(ieee, skb); |
| break; |
| case IEEE80211_STYPE_ACTION: |
| rtllib_process_action(ieee, skb); |
| break; |
| default: |
| return -1; |
| } |
| return 0; |
| } |
| |
| /* following are for a simpler TX queue management. |
| * Instead of using netif_[stop/wake]_queue the driver |
| * will use these two functions (plus a reset one), that |
| * will internally use the kernel netif_* and takes |
| * care of the ieee802.11 fragmentation. |
| * So the driver receives a fragment per time and might |
| * call the stop function when it wants to not |
| * have enough room to TX an entire packet. |
| * This might be useful if each fragment needs it's own |
| * descriptor, thus just keep a total free memory > than |
| * the max fragmentation threshold is not enough.. If the |
| * ieee802.11 stack passed a TXB struct then you need |
| * to keep N free descriptors where |
| * N = MAX_PACKET_SIZE / MIN_FRAG_TRESHOLD |
| * In this way you need just one and the 802.11 stack |
| * will take care of buffering fragments and pass them to |
| * the driver later, when it wakes the queue. |
| */ |
| void rtllib_softmac_xmit(struct rtllib_txb *txb, struct rtllib_device *ieee) |
| { |
| unsigned int queue_index = txb->queue_index; |
| unsigned long flags; |
| int i; |
| struct cb_desc *tcb_desc = NULL; |
| unsigned long queue_len = 0; |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| /* called with 2nd parm 0, no tx mgmt lock required */ |
| rtllib_sta_wakeup(ieee, 0); |
| |
| /* update the tx status */ |
| tcb_desc = (struct cb_desc *)(txb->fragments[0]->cb + |
| MAX_DEV_ADDR_SIZE); |
| if (tcb_desc->multicast) |
| ieee->stats.multicast++; |
| |
| /* if xmit available, just xmit it immediately, else just insert it to |
| * the wait queue |
| */ |
| for (i = 0; i < txb->nr_frags; i++) { |
| queue_len = skb_queue_len(&ieee->skb_waitq[queue_index]); |
| if ((queue_len != 0) || |
| (!ieee->check_nic_enough_desc(ieee->dev, queue_index)) || |
| (ieee->queue_stop)) { |
| /* insert the skb packet to the wait queue |
| * as for the completion function, it does not need |
| * to check it any more. |
| */ |
| if (queue_len < 200) |
| skb_queue_tail(&ieee->skb_waitq[queue_index], |
| txb->fragments[i]); |
| else |
| kfree_skb(txb->fragments[i]); |
| } else { |
| ieee->softmac_data_hard_start_xmit(txb->fragments[i], |
| ieee->dev, ieee->rate); |
| } |
| } |
| |
| rtllib_txb_free(txb); |
| |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } |
| |
| void rtllib_reset_queue(struct rtllib_device *ieee) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| init_mgmt_queue(ieee); |
| if (ieee->tx_pending.txb) { |
| rtllib_txb_free(ieee->tx_pending.txb); |
| ieee->tx_pending.txb = NULL; |
| } |
| ieee->queue_stop = 0; |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } |
| EXPORT_SYMBOL(rtllib_reset_queue); |
| |
| void rtllib_stop_all_queues(struct rtllib_device *ieee) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ieee->dev->num_tx_queues; i++) |
| txq_trans_cond_update(netdev_get_tx_queue(ieee->dev, i)); |
| |
| netif_tx_stop_all_queues(ieee->dev); |
| } |
| |
| void rtllib_wake_all_queues(struct rtllib_device *ieee) |
| { |
| netif_tx_wake_all_queues(ieee->dev); |
| } |
| |
| /* this is called only in user context, with wx_mutex held */ |
| static void rtllib_start_bss(struct rtllib_device *ieee) |
| { |
| unsigned long flags; |
| |
| /* check if we have already found the net we |
| * are interested in (if any). |
| * if not (we are disassociated and we are not |
| * in associating / authenticating phase) start the background scanning. |
| */ |
| rtllib_softmac_check_all_nets(ieee); |
| |
| /* ensure no-one start an associating process (thus setting |
| * the ieee->link_state to rtllib_ASSOCIATING) while we |
| * have just checked it and we are going to enable scan. |
| * The rtllib_new_net function is always called with |
| * lock held (from both rtllib_softmac_check_all_nets and |
| * the rx path), so we cannot be in the middle of such function |
| */ |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| if (ieee->link_state == MAC80211_NOLINK) |
| rtllib_start_scan(ieee); |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| } |
| |
| static void rtllib_link_change_wq(void *data) |
| { |
| struct rtllib_device *ieee = container_of_dwork_rsl(data, |
| struct rtllib_device, link_change_wq); |
| ieee->link_change(ieee->dev); |
| } |
| |
| /* called only in userspace context */ |
| void rtllib_disassociate(struct rtllib_device *ieee) |
| { |
| netif_carrier_off(ieee->dev); |
| if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE) |
| rtllib_reset_queue(ieee); |
| |
| ieee->link_state = MAC80211_NOLINK; |
| ieee->is_set_key = false; |
| ieee->wap_set = 0; |
| |
| schedule_delayed_work(&ieee->link_change_wq, 0); |
| |
| notify_wx_assoc_event(ieee); |
| } |
| |
| static void rtllib_associate_retry_wq(void *data) |
| { |
| struct rtllib_device *ieee = container_of_dwork_rsl(data, |
| struct rtllib_device, associate_retry_wq); |
| unsigned long flags; |
| |
| mutex_lock(&ieee->wx_mutex); |
| if (!ieee->proto_started) |
| goto exit; |
| |
| if (ieee->link_state != RTLLIB_ASSOCIATING_RETRY) |
| goto exit; |
| |
| /* until we do not set the state to MAC80211_NOLINK |
| * there are no possibility to have someone else trying |
| * to start an association procedure (we get here with |
| * ieee->link_state = RTLLIB_ASSOCIATING). |
| * When we set the state to MAC80211_NOLINK it is possible |
| * that the RX path run an attempt to associate, but |
| * both rtllib_softmac_check_all_nets and the |
| * RX path works with ieee->lock held so there are no |
| * problems. If we are still disassociated then start a scan. |
| * the lock here is necessary to ensure no one try to start |
| * an association procedure when we have just checked the |
| * state and we are going to start the scan. |
| */ |
| ieee->beinretry = true; |
| ieee->link_state = MAC80211_NOLINK; |
| |
| rtllib_softmac_check_all_nets(ieee); |
| |
| spin_lock_irqsave(&ieee->lock, flags); |
| |
| if (ieee->link_state == MAC80211_NOLINK) |
| rtllib_start_scan(ieee); |
| spin_unlock_irqrestore(&ieee->lock, flags); |
| |
| ieee->beinretry = false; |
| exit: |
| mutex_unlock(&ieee->wx_mutex); |
| } |
| |
| void rtllib_softmac_stop_protocol(struct rtllib_device *ieee) |
| { |
| rtllib_stop_scan_syncro(ieee); |
| mutex_lock(&ieee->wx_mutex); |
| rtllib_stop_protocol(ieee); |
| mutex_unlock(&ieee->wx_mutex); |
| } |
| EXPORT_SYMBOL(rtllib_softmac_stop_protocol); |
| |
| void rtllib_stop_protocol(struct rtllib_device *ieee) |
| { |
| if (!ieee->proto_started) |
| return; |
| |
| ieee->proto_started = 0; |
| ieee->proto_stoppping = 1; |
| ieee->rtllib_ips_leave(ieee->dev); |
| |
| del_timer_sync(&ieee->associate_timer); |
| mutex_unlock(&ieee->wx_mutex); |
| cancel_delayed_work_sync(&ieee->associate_retry_wq); |
| mutex_lock(&ieee->wx_mutex); |
| cancel_delayed_work_sync(&ieee->link_change_wq); |
| rtllib_stop_scan(ieee); |
| |
| if (ieee->link_state <= RTLLIB_ASSOCIATING_AUTHENTICATED) |
| ieee->link_state = MAC80211_NOLINK; |
| |
| if (ieee->link_state == MAC80211_LINKED) { |
| if (ieee->iw_mode == IW_MODE_INFRA) |
| send_disassociation(ieee, 1, WLAN_REASON_DEAUTH_LEAVING); |
| rtllib_disassociate(ieee); |
| } |
| |
| remove_all_ts(ieee); |
| ieee->proto_stoppping = 0; |
| |
| kfree(ieee->assocreq_ies); |
| ieee->assocreq_ies = NULL; |
| ieee->assocreq_ies_len = 0; |
| kfree(ieee->assocresp_ies); |
| ieee->assocresp_ies = NULL; |
| ieee->assocresp_ies_len = 0; |
| } |
| |
| void rtllib_softmac_start_protocol(struct rtllib_device *ieee) |
| { |
| mutex_lock(&ieee->wx_mutex); |
| rtllib_start_protocol(ieee); |
| mutex_unlock(&ieee->wx_mutex); |
| } |
| EXPORT_SYMBOL(rtllib_softmac_start_protocol); |
| |
| void rtllib_start_protocol(struct rtllib_device *ieee) |
| { |
| short ch = 0; |
| int i = 0; |
| |
| if (ieee->proto_started) |
| return; |
| |
| ieee->proto_started = 1; |
| |
| if (ieee->current_network.channel == 0) { |
| do { |
| ch++; |
| if (ch > MAX_CHANNEL_NUMBER) |
| return; /* no channel found */ |
| } while (!ieee->active_channel_map[ch]); |
| ieee->current_network.channel = ch; |
| } |
| |
| if (ieee->current_network.beacon_interval == 0) |
| ieee->current_network.beacon_interval = 100; |
| |
| for (i = 0; i < 17; i++) { |
| ieee->last_rxseq_num[i] = -1; |
| ieee->last_rxfrag_num[i] = -1; |
| ieee->last_packet_time[i] = 0; |
| } |
| |
| ieee->wmm_acm = 0; |
| /* if the user set the MAC of the ad-hoc cell and then |
| * switch to managed mode, shall we make sure that association |
| * attempts does not fail just because the user provide the essid |
| * and the nic is still checking for the AP MAC ?? |
| */ |
| switch (ieee->iw_mode) { |
| case IW_MODE_INFRA: |
| rtllib_start_bss(ieee); |
| break; |
| } |
| } |
| |
| int rtllib_softmac_init(struct rtllib_device *ieee) |
| { |
| int i; |
| |
| memset(&ieee->current_network, 0, sizeof(struct rtllib_network)); |
| |
| ieee->link_state = MAC80211_NOLINK; |
| for (i = 0; i < 5; i++) |
| ieee->seq_ctrl[i] = 0; |
| |
| ieee->link_detect_info.slot_index = 0; |
| ieee->link_detect_info.slot_num = 2; |
| ieee->link_detect_info.num_recv_bcn_in_period = 0; |
| ieee->link_detect_info.num_recv_data_in_period = 0; |
| ieee->link_detect_info.num_tx_ok_in_period = 0; |
| ieee->link_detect_info.num_rx_ok_in_period = 0; |
| ieee->link_detect_info.num_rx_unicast_ok_in_period = 0; |
| ieee->is_aggregate_frame = false; |
| ieee->assoc_id = 0; |
| ieee->queue_stop = 0; |
| ieee->scanning_continue = 0; |
| ieee->softmac_features = 0; |
| ieee->wap_set = 0; |
| ieee->ssid_set = 0; |
| ieee->proto_started = 0; |
| ieee->proto_stoppping = 0; |
| ieee->basic_rate = RTLLIB_DEFAULT_BASIC_RATE; |
| ieee->rate = 22; |
| ieee->ps = RTLLIB_PS_DISABLED; |
| ieee->sta_sleep = LPS_IS_WAKE; |
| |
| ieee->reg_dot11ht_oper_rate_set[0] = 0xff; |
| ieee->reg_dot11ht_oper_rate_set[1] = 0xff; |
| ieee->reg_dot11ht_oper_rate_set[4] = 0x01; |
| |
| ieee->reg_dot11tx_ht_oper_rate_set[0] = 0xff; |
| ieee->reg_dot11tx_ht_oper_rate_set[1] = 0xff; |
| ieee->reg_dot11tx_ht_oper_rate_set[4] = 0x01; |
| |
| ieee->first_ie_in_scan = false; |
| ieee->actscanning = false; |
| ieee->beinretry = false; |
| ieee->is_set_key = false; |
| init_mgmt_queue(ieee); |
| |
| ieee->tx_pending.txb = NULL; |
| |
| timer_setup(&ieee->associate_timer, rtllib_associate_abort_cb, 0); |
| |
| INIT_DELAYED_WORK(&ieee->link_change_wq, (void *)rtllib_link_change_wq); |
| INIT_WORK(&ieee->associate_complete_wq, (void *)rtllib_associate_complete_wq); |
| INIT_DELAYED_WORK(&ieee->associate_procedure_wq, (void *)rtllib_associate_procedure_wq); |
| INIT_DELAYED_WORK(&ieee->softmac_scan_wq, (void *)rtllib_softmac_scan_wq); |
| INIT_DELAYED_WORK(&ieee->associate_retry_wq, (void *)rtllib_associate_retry_wq); |
| INIT_WORK(&ieee->wx_sync_scan_wq, (void *)rtllib_wx_sync_scan_wq); |
| |
| mutex_init(&ieee->wx_mutex); |
| mutex_init(&ieee->scan_mutex); |
| mutex_init(&ieee->ips_mutex); |
| |
| spin_lock_init(&ieee->mgmt_tx_lock); |
| spin_lock_init(&ieee->beacon_lock); |
| |
| INIT_WORK(&ieee->ps_task, rtllib_sta_ps); |
| |
| return 0; |
| } |
| |
| void rtllib_softmac_free(struct rtllib_device *ieee) |
| { |
| del_timer_sync(&ieee->associate_timer); |
| |
| cancel_delayed_work_sync(&ieee->associate_retry_wq); |
| cancel_delayed_work_sync(&ieee->associate_procedure_wq); |
| cancel_delayed_work_sync(&ieee->softmac_scan_wq); |
| cancel_delayed_work_sync(&ieee->hw_wakeup_wq); |
| cancel_delayed_work_sync(&ieee->hw_sleep_wq); |
| cancel_delayed_work_sync(&ieee->link_change_wq); |
| cancel_work_sync(&ieee->associate_complete_wq); |
| cancel_work_sync(&ieee->ips_leave_wq); |
| cancel_work_sync(&ieee->wx_sync_scan_wq); |
| cancel_work_sync(&ieee->ps_task); |
| } |
| |
| static inline struct sk_buff * |
| rtllib_disauth_skb(struct rtllib_network *beacon, |
| struct rtllib_device *ieee, u16 rsn) |
| { |
| struct sk_buff *skb; |
| struct rtllib_disauth *disauth; |
| int len = sizeof(struct rtllib_disauth) + ieee->tx_headroom; |
| |
| skb = dev_alloc_skb(len); |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, ieee->tx_headroom); |
| |
| disauth = skb_put(skb, sizeof(struct rtllib_disauth)); |
| disauth->header.frame_control = cpu_to_le16(IEEE80211_STYPE_DEAUTH); |
| disauth->header.duration_id = 0; |
| |
| ether_addr_copy(disauth->header.addr1, beacon->bssid); |
| ether_addr_copy(disauth->header.addr2, ieee->dev->dev_addr); |
| ether_addr_copy(disauth->header.addr3, beacon->bssid); |
| |
| disauth->reason = cpu_to_le16(rsn); |
| return skb; |
| } |
| |
| static inline struct sk_buff * |
| rtllib_disassociate_skb(struct rtllib_network *beacon, |
| struct rtllib_device *ieee, u16 rsn) |
| { |
| struct sk_buff *skb; |
| struct rtllib_disassoc *disass; |
| int len = sizeof(struct rtllib_disassoc) + ieee->tx_headroom; |
| |
| skb = dev_alloc_skb(len); |
| |
| if (!skb) |
| return NULL; |
| |
| skb_reserve(skb, ieee->tx_headroom); |
| |
| disass = skb_put(skb, sizeof(struct rtllib_disassoc)); |
| disass->header.frame_control = cpu_to_le16(IEEE80211_STYPE_DISASSOC); |
| disass->header.duration_id = 0; |
| |
| ether_addr_copy(disass->header.addr1, beacon->bssid); |
| ether_addr_copy(disass->header.addr2, ieee->dev->dev_addr); |
| ether_addr_copy(disass->header.addr3, beacon->bssid); |
| |
| disass->reason = cpu_to_le16(rsn); |
| return skb; |
| } |
| |
| void send_disassociation(struct rtllib_device *ieee, bool deauth, u16 rsn) |
| { |
| struct rtllib_network *beacon = &ieee->current_network; |
| struct sk_buff *skb; |
| |
| if (deauth) |
| skb = rtllib_disauth_skb(beacon, ieee, rsn); |
| else |
| skb = rtllib_disassociate_skb(beacon, ieee, rsn); |
| |
| if (skb) |
| softmac_mgmt_xmit(skb, ieee); |
| } |
| |
| u8 rtllib_ap_sec_type(struct rtllib_device *ieee) |
| { |
| static u8 ccmp_ie[4] = {0x00, 0x50, 0xf2, 0x04}; |
| static u8 ccmp_rsn_ie[4] = {0x00, 0x0f, 0xac, 0x04}; |
| int wpa_ie_len = ieee->wpa_ie_len; |
| struct lib80211_crypt_data *crypt; |
| int encrypt; |
| |
| crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx]; |
| encrypt = (ieee->current_network.capability & WLAN_CAPABILITY_PRIVACY) |
| || (crypt && crypt->ops && (strcmp(crypt->ops->name, "R-WEP") == 0)); |
| |
| /* simply judge */ |
| if (encrypt && (wpa_ie_len == 0)) { |
| return SEC_ALG_WEP; |
| } else if ((wpa_ie_len != 0)) { |
| if (((ieee->wpa_ie[0] == 0xdd) && |
| (!memcmp(&ieee->wpa_ie[14], ccmp_ie, 4))) || |
| ((ieee->wpa_ie[0] == 0x30) && |
| (!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4)))) |
| return SEC_ALG_CCMP; |
| else |
| return SEC_ALG_TKIP; |
| } else { |
| return SEC_ALG_NONE; |
| } |
| } |
| |
| static void rtllib_mlme_disassociate_request(struct rtllib_device *rtllib, |
| u8 *addr, u8 rsn) |
| { |
| u8 i; |
| u8 op_mode; |
| |
| remove_peer_ts(rtllib, addr); |
| |
| if (memcmp(rtllib->current_network.bssid, addr, 6) == 0) { |
| rtllib->link_state = MAC80211_NOLINK; |
| |
| for (i = 0; i < 6; i++) |
| rtllib->current_network.bssid[i] = 0x22; |
| op_mode = RT_OP_MODE_NO_LINK; |
| rtllib->op_mode = RT_OP_MODE_NO_LINK; |
| rtllib->set_hw_reg_handler(rtllib->dev, HW_VAR_MEDIA_STATUS, |
| (u8 *)(&op_mode)); |
| rtllib_disassociate(rtllib); |
| |
| rtllib->set_hw_reg_handler(rtllib->dev, HW_VAR_BSSID, |
| rtllib->current_network.bssid); |
| } |
| } |
| |
| static void rtllib_mgnt_disconnect_ap(struct rtllib_device *rtllib, u8 rsn) |
| { |
| bool filter_out_nonassociated_bssid = false; |
| |
| filter_out_nonassociated_bssid = false; |
| rtllib->set_hw_reg_handler(rtllib->dev, HW_VAR_CECHK_BSSID, |
| (u8 *)(&filter_out_nonassociated_bssid)); |
| rtllib_mlme_disassociate_request(rtllib, rtllib->current_network.bssid, |
| rsn); |
| |
| rtllib->link_state = MAC80211_NOLINK; |
| } |
| |
| bool rtllib_mgnt_disconnect(struct rtllib_device *rtllib, u8 rsn) |
| { |
| if (rtllib->ps != RTLLIB_PS_DISABLED) |
| rtllib->sta_wake_up(rtllib->dev); |
| |
| if (rtllib->link_state == MAC80211_LINKED) { |
| if (rtllib->iw_mode == IW_MODE_INFRA) |
| rtllib_mgnt_disconnect_ap(rtllib, rsn); |
| } |
| |
| return true; |
| } |
| EXPORT_SYMBOL(rtllib_mgnt_disconnect); |
| |
| void notify_wx_assoc_event(struct rtllib_device *ieee) |
| { |
| union iwreq_data wrqu; |
| |
| if (ieee->cannot_notify) |
| return; |
| |
| wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
| if (ieee->link_state == MAC80211_LINKED) { |
| memcpy(wrqu.ap_addr.sa_data, ieee->current_network.bssid, |
| ETH_ALEN); |
| } else { |
| netdev_info(ieee->dev, "%s(): Tell user space disconnected\n", |
| __func__); |
| eth_zero_addr(wrqu.ap_addr.sa_data); |
| } |
| wireless_send_event(ieee->dev, SIOCGIWAP, &wrqu, NULL); |
| } |
| EXPORT_SYMBOL(notify_wx_assoc_event); |