/* * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211 * Copyright (c) 2008, Jouni Malinen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /* * TODO: * - IBSS mode simulation (Beacon transmission with competition for "air time") * - RX filtering based on filter configuration (data->rx_filter) */ #include #include #include #include #include #include #include #include #include #include MODULE_AUTHOR("Jouni Malinen"); MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211"); MODULE_LICENSE("GPL"); static int radios = 2; module_param(radios, int, 0444); MODULE_PARM_DESC(radios, "Number of simulated radios"); /** * enum hwsim_regtest - the type of regulatory tests we offer * * These are the different values you can use for the regtest * module parameter. This is useful to help test world roaming * and the driver regulatory_hint() call and combinations of these. * If you want to do specific alpha2 regulatory domain tests simply * use the userspace regulatory request as that will be respected as * well without the need of this module parameter. This is designed * only for testing the driver regulatory request, world roaming * and all possible combinations. * * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed, * this is the default value. * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory * hint, only one driver regulatory hint will be sent as such the * secondary radios are expected to follow. * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory * request with all radios reporting the same regulatory domain. * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling * different regulatory domains requests. Expected behaviour is for * an intersection to occur but each device will still use their * respective regulatory requested domains. Subsequent radios will * use the resulting intersection. * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We acomplish * this by using a custom beacon-capable regulatory domain for the first * radio. All other device world roam. * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory * domain requests. All radios will adhere to this custom world regulatory * domain. * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory * domain requests. The first radio will adhere to the first custom world * regulatory domain, the second one to the second custom world regulatory * domain. All other devices will world roam. * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain * settings, only the first radio will send a regulatory domain request * and use strict settings. The rest of the radios are expected to follow. * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain * settings. All radios will adhere to this. * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory * domain settings, combined with secondary driver regulatory domain * settings. The first radio will get a strict regulatory domain setting * using the first driver regulatory request and the second radio will use * non-strict settings using the second driver regulatory request. All * other devices should follow the intersection created between the * first two. * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need * at least 6 radios for a complete test. We will test in this order: * 1 - driver custom world regulatory domain * 2 - second custom world regulatory domain * 3 - first driver regulatory domain request * 4 - second driver regulatory domain request * 5 - strict regulatory domain settings using the third driver regulatory * domain request * 6 and on - should follow the intersection of the 3rd, 4rth and 5th radio * regulatory requests. */ enum hwsim_regtest { HWSIM_REGTEST_DISABLED = 0, HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1, HWSIM_REGTEST_DRIVER_REG_ALL = 2, HWSIM_REGTEST_DIFF_COUNTRY = 3, HWSIM_REGTEST_WORLD_ROAM = 4, HWSIM_REGTEST_CUSTOM_WORLD = 5, HWSIM_REGTEST_CUSTOM_WORLD_2 = 6, HWSIM_REGTEST_STRICT_FOLLOW = 7, HWSIM_REGTEST_STRICT_ALL = 8, HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9, HWSIM_REGTEST_ALL = 10, }; /* Set to one of the HWSIM_REGTEST_* values above */ static int regtest = HWSIM_REGTEST_DISABLED; module_param(regtest, int, 0444); MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run"); static const char *hwsim_alpha2s[] = { "FI", "AL", "US", "DE", "JP", "AL", }; static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = { .n_reg_rules = 4, .alpha2 = "99", .reg_rules = { REG_RULE(2412-10, 2462+10, 40, 0, 20, 0), REG_RULE(2484-10, 2484+10, 40, 0, 20, 0), REG_RULE(5150-10, 5240+10, 40, 0, 30, 0), REG_RULE(5745-10, 5825+10, 40, 0, 30, 0), } }; static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = { .n_reg_rules = 2, .alpha2 = "99", .reg_rules = { REG_RULE(2412-10, 2462+10, 40, 0, 20, 0), REG_RULE(5725-10, 5850+10, 40, 0, 30, NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS), } }; struct hwsim_vif_priv { u32 magic; u8 bssid[ETH_ALEN]; bool assoc; u16 aid; }; #define HWSIM_VIF_MAGIC 0x69537748 static inline void hwsim_check_magic(struct ieee80211_vif *vif) { struct hwsim_vif_priv *vp = (void *)vif->drv_priv; WARN_ON(vp->magic != HWSIM_VIF_MAGIC); } static inline void hwsim_set_magic(struct ieee80211_vif *vif) { struct hwsim_vif_priv *vp = (void *)vif->drv_priv; vp->magic = HWSIM_VIF_MAGIC; } static inline void hwsim_clear_magic(struct ieee80211_vif *vif) { struct hwsim_vif_priv *vp = (void *)vif->drv_priv; vp->magic = 0; } struct hwsim_sta_priv { u32 magic; }; #define HWSIM_STA_MAGIC 0x6d537748 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta) { struct hwsim_sta_priv *sp = (void *)sta->drv_priv; WARN_ON(sp->magic != HWSIM_STA_MAGIC); } static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta) { struct hwsim_sta_priv *sp = (void *)sta->drv_priv; sp->magic = HWSIM_STA_MAGIC; } static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta) { struct hwsim_sta_priv *sp = (void *)sta->drv_priv; sp->magic = 0; } static struct class *hwsim_class; static struct net_device *hwsim_mon; /* global monitor netdev */ #define CHAN2G(_freq) { \ .band = IEEE80211_BAND_2GHZ, \ .center_freq = (_freq), \ .hw_value = (_freq), \ .max_power = 20, \ } #define CHAN5G(_freq) { \ .band = IEEE80211_BAND_5GHZ, \ .center_freq = (_freq), \ .hw_value = (_freq), \ .max_power = 20, \ } static const struct ieee80211_channel hwsim_channels_2ghz[] = { CHAN2G(2412), /* Channel 1 */ CHAN2G(2417), /* Channel 2 */ CHAN2G(2422), /* Channel 3 */ CHAN2G(2427), /* Channel 4 */ CHAN2G(2432), /* Channel 5 */ CHAN2G(2437), /* Channel 6 */ CHAN2G(2442), /* Channel 7 */ CHAN2G(2447), /* Channel 8 */ CHAN2G(2452), /* Channel 9 */ CHAN2G(2457), /* Channel 10 */ CHAN2G(2462), /* Channel 11 */ CHAN2G(2467), /* Channel 12 */ CHAN2G(2472), /* Channel 13 */ CHAN2G(2484), /* Channel 14 */ }; static const struct ieee80211_channel hwsim_channels_5ghz[] = { CHAN5G(5180), /* Channel 36 */ CHAN5G(5200), /* Channel 40 */ CHAN5G(5220), /* Channel 44 */ CHAN5G(5240), /* Channel 48 */ CHAN5G(5260), /* Channel 52 */ CHAN5G(5280), /* Channel 56 */ CHAN5G(5300), /* Channel 60 */ CHAN5G(5320), /* Channel 64 */ CHAN5G(5500), /* Channel 100 */ CHAN5G(5520), /* Channel 104 */ CHAN5G(5540), /* Channel 108 */ CHAN5G(5560), /* Channel 112 */ CHAN5G(5580), /* Channel 116 */ CHAN5G(5600), /* Channel 120 */ CHAN5G(5620), /* Channel 124 */ CHAN5G(5640), /* Channel 128 */ CHAN5G(5660), /* Channel 132 */ CHAN5G(5680), /* Channel 136 */ CHAN5G(5700), /* Channel 140 */ CHAN5G(5745), /* Channel 149 */ CHAN5G(5765), /* Channel 153 */ CHAN5G(5785), /* Channel 157 */ CHAN5G(5805), /* Channel 161 */ CHAN5G(5825), /* Channel 165 */ }; static const struct ieee80211_rate hwsim_rates[] = { { .bitrate = 10 }, { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 60 }, { .bitrate = 90 }, { .bitrate = 120 }, { .bitrate = 180 }, { .bitrate = 240 }, { .bitrate = 360 }, { .bitrate = 480 }, { .bitrate = 540 } }; static spinlock_t hwsim_radio_lock; static struct list_head hwsim_radios; struct mac80211_hwsim_data { struct list_head list; struct ieee80211_hw *hw; struct device *dev; struct ieee80211_supported_band bands[2]; struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)]; struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)]; struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)]; struct ieee80211_channel *channel; unsigned long beacon_int; /* in jiffies unit */ unsigned int rx_filter; int started; struct timer_list beacon_timer; enum ps_mode { PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL } ps; bool ps_poll_pending; struct dentry *debugfs; struct dentry *debugfs_ps; /* * Only radios in the same group can communicate together (the * channel has to match too). Each bit represents a group. A * radio can be in more then one group. */ u64 group; struct dentry *debugfs_group; }; struct hwsim_radiotap_hdr { struct ieee80211_radiotap_header hdr; u8 rt_flags; u8 rt_rate; __le16 rt_channel; __le16 rt_chbitmask; } __attribute__ ((packed)); static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev) { /* TODO: allow packet injection */ dev_kfree_skb(skb); return NETDEV_TX_OK; } static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw, struct sk_buff *tx_skb) { struct mac80211_hwsim_data *data = hw->priv; struct sk_buff *skb; struct hwsim_radiotap_hdr *hdr; u16 flags; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb); struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info); if (!netif_running(hwsim_mon)) return; skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC); if (skb == NULL) return; hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr)); hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION; hdr->hdr.it_pad = 0; hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr)); hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | (1 << IEEE80211_RADIOTAP_RATE) | (1 << IEEE80211_RADIOTAP_CHANNEL)); hdr->rt_flags = 0; hdr->rt_rate = txrate->bitrate / 5; hdr->rt_channel = cpu_to_le16(data->channel->center_freq); flags = IEEE80211_CHAN_2GHZ; if (txrate->flags & IEEE80211_RATE_ERP_G) flags |= IEEE80211_CHAN_OFDM; else flags |= IEEE80211_CHAN_CCK; hdr->rt_chbitmask = cpu_to_le16(flags); skb->dev = hwsim_mon; skb_set_mac_header(skb, 0); skb->ip_summed = CHECKSUM_UNNECESSARY; skb->pkt_type = PACKET_OTHERHOST; skb->protocol = htons(ETH_P_802_2); memset(skb->cb, 0, sizeof(skb->cb)); netif_rx(skb); } static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data, struct sk_buff *skb) { switch (data->ps) { case PS_DISABLED: return true; case PS_ENABLED: return false; case PS_AUTO_POLL: /* TODO: accept (some) Beacons by default and other frames only * if pending PS-Poll has been sent */ return true; case PS_MANUAL_POLL: /* Allow unicast frames to own address if there is a pending * PS-Poll */ if (data->ps_poll_pending && memcmp(data->hw->wiphy->perm_addr, skb->data + 4, ETH_ALEN) == 0) { data->ps_poll_pending = false; return true; } return false; } return true; } static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw, struct sk_buff *skb) { struct mac80211_hwsim_data *data = hw->priv, *data2; bool ack = false; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct ieee80211_rx_status rx_status; memset(&rx_status, 0, sizeof(rx_status)); /* TODO: set mactime */ rx_status.freq = data->channel->center_freq; rx_status.band = data->channel->band; rx_status.rate_idx = info->control.rates[0].idx; /* TODO: simulate real signal strength (and optional packet loss) */ rx_status.signal = -50; if (data->ps != PS_DISABLED) hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); /* release the skb's source info */ skb_orphan(skb); skb_dst_drop(skb); skb->mark = 0; secpath_reset(skb); nf_reset(skb); /* Copy skb to all enabled radios that are on the current frequency */ spin_lock(&hwsim_radio_lock); list_for_each_entry(data2, &hwsim_radios, list) { struct sk_buff *nskb; if (data == data2) continue; if (!data2->started || !hwsim_ps_rx_ok(data2, skb) || !data->channel || !data2->channel || data->channel->center_freq != data2->channel->center_freq || !(data->group & data2->group)) continue; nskb = skb_copy(skb, GFP_ATOMIC); if (nskb == NULL) continue; if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr, ETH_ALEN) == 0) ack = true; memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status)); ieee80211_rx_irqsafe(data2->hw, nskb); } spin_unlock(&hwsim_radio_lock); return ack; } static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { bool ack; struct ieee80211_tx_info *txi; mac80211_hwsim_monitor_rx(hw, skb); if (skb->len < 10) { /* Should not happen; just a sanity check for addr1 use */ dev_kfree_skb(skb); return NETDEV_TX_OK; } ack = mac80211_hwsim_tx_frame(hw, skb); txi = IEEE80211_SKB_CB(skb); if (txi->control.vif) hwsim_check_magic(txi->control.vif); if (txi->control.sta) hwsim_check_sta_magic(txi->control.sta); ieee80211_tx_info_clear_status(txi); if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack) txi->flags |= IEEE80211_TX_STAT_ACK; ieee80211_tx_status_irqsafe(hw, skb); return NETDEV_TX_OK; } static int mac80211_hwsim_start(struct ieee80211_hw *hw) { struct mac80211_hwsim_data *data = hw->priv; printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__); data->started = 1; return 0; } static void mac80211_hwsim_stop(struct ieee80211_hw *hw) { struct mac80211_hwsim_data *data = hw->priv; data->started = 0; del_timer(&data->beacon_timer); printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__); } static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n", wiphy_name(hw->wiphy), __func__, conf->type, conf->mac_addr); hwsim_set_magic(conf->vif); return 0; } static void mac80211_hwsim_remove_interface( struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n", wiphy_name(hw->wiphy), __func__, conf->type, conf->mac_addr); hwsim_check_magic(conf->vif); hwsim_clear_magic(conf->vif); } static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac, struct ieee80211_vif *vif) { struct ieee80211_hw *hw = arg; struct sk_buff *skb; struct ieee80211_tx_info *info; hwsim_check_magic(vif); if (vif->type != NL80211_IFTYPE_AP && vif->type != NL80211_IFTYPE_MESH_POINT) return; skb = ieee80211_beacon_get(hw, vif); if (skb == NULL) return; info = IEEE80211_SKB_CB(skb); mac80211_hwsim_monitor_rx(hw, skb); mac80211_hwsim_tx_frame(hw, skb); dev_kfree_skb(skb); } static void mac80211_hwsim_beacon(unsigned long arg) { struct ieee80211_hw *hw = (struct ieee80211_hw *) arg; struct mac80211_hwsim_data *data = hw->priv; if (!data->started) return; ieee80211_iterate_active_interfaces_atomic( hw, mac80211_hwsim_beacon_tx, hw); data->beacon_timer.expires = jiffies + data->beacon_int; add_timer(&data->beacon_timer); } static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed) { struct mac80211_hwsim_data *data = hw->priv; struct ieee80211_conf *conf = &hw->conf; printk(KERN_DEBUG "%s:%s (freq=%d idle=%d ps=%d)\n", wiphy_name(hw->wiphy), __func__, conf->channel->center_freq, !!(conf->flags & IEEE80211_CONF_IDLE), !!(conf->flags & IEEE80211_CONF_PS)); data->channel = conf->channel; if (!data->started || !data->beacon_int) del_timer(&data->beacon_timer); else mod_timer(&data->beacon_timer, jiffies + data->beacon_int); return 0; } static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, int mc_count, struct dev_addr_list *mc_list) { struct mac80211_hwsim_data *data = hw->priv; printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__); data->rx_filter = 0; if (*total_flags & FIF_PROMISC_IN_BSS) data->rx_filter |= FIF_PROMISC_IN_BSS; if (*total_flags & FIF_ALLMULTI) data->rx_filter |= FIF_ALLMULTI; *total_flags = data->rx_filter; } static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *info, u32 changed) { struct hwsim_vif_priv *vp = (void *)vif->drv_priv; struct mac80211_hwsim_data *data = hw->priv; hwsim_check_magic(vif); printk(KERN_DEBUG "%s:%s(changed=0x%x)\n", wiphy_name(hw->wiphy), __func__, changed); if (changed & BSS_CHANGED_BSSID) { printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n", wiphy_name(hw->wiphy), __func__, info->bssid); memcpy(vp->bssid, info->bssid, ETH_ALEN); } if (changed & BSS_CHANGED_ASSOC) { printk(KERN_DEBUG " %s: ASSOC: assoc=%d aid=%d\n", wiphy_name(hw->wiphy), info->assoc, info->aid); vp->assoc = info->assoc; vp->aid = info->aid; } if (changed & BSS_CHANGED_BEACON_INT) { printk(KERN_DEBUG " %s: BCNINT: %d\n", wiphy_name(hw->wiphy), info->beacon_int); data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000; if (WARN_ON(!data->beacon_int)) data->beacon_int = 1; } if (changed & BSS_CHANGED_ERP_CTS_PROT) { printk(KERN_DEBUG " %s: ERP_CTS_PROT: %d\n", wiphy_name(hw->wiphy), info->use_cts_prot); } if (changed & BSS_CHANGED_ERP_PREAMBLE) { printk(KERN_DEBUG " %s: ERP_PREAMBLE: %d\n", wiphy_name(hw->wiphy), info->use_short_preamble); } if (changed & BSS_CHANGED_ERP_SLOT) { printk(KERN_DEBUG " %s: ERP_SLOT: %d\n", wiphy_name(hw->wiphy), info->use_short_slot); } if (changed & BSS_CHANGED_HT) { printk(KERN_DEBUG " %s: HT: op_mode=0x%x\n", wiphy_name(hw->wiphy), info->ht_operation_mode); } if (changed & BSS_CHANGED_BASIC_RATES) { printk(KERN_DEBUG " %s: BASIC_RATES: 0x%llx\n", wiphy_name(hw->wiphy), (unsigned long long) info->basic_rates); } } static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum sta_notify_cmd cmd, struct ieee80211_sta *sta) { hwsim_check_magic(vif); switch (cmd) { case STA_NOTIFY_ADD: hwsim_set_sta_magic(sta); break; case STA_NOTIFY_REMOVE: hwsim_clear_sta_magic(sta); break; case STA_NOTIFY_SLEEP: case STA_NOTIFY_AWAKE: /* TODO: make good use of these flags */ break; } } static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set) { hwsim_check_sta_magic(sta); return 0; } static int mac80211_hwsim_conf_tx( struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params) { printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d " "aifs=%d)\n", wiphy_name(hw->wiphy), __func__, queue, params->txop, params->cw_min, params->cw_max, params->aifs); return 0; } #ifdef CONFIG_NL80211_TESTMODE /* * This section contains example code for using netlink * attributes with the testmode command in nl80211. */ /* These enums need to be kept in sync with userspace */ enum hwsim_testmode_attr { __HWSIM_TM_ATTR_INVALID = 0, HWSIM_TM_ATTR_CMD = 1, HWSIM_TM_ATTR_PS = 2, /* keep last */ __HWSIM_TM_ATTR_AFTER_LAST, HWSIM_TM_ATTR_MAX = __HWSIM_TM_ATTR_AFTER_LAST - 1 }; enum hwsim_testmode_cmd { HWSIM_TM_CMD_SET_PS = 0, HWSIM_TM_CMD_GET_PS = 1, }; static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = { [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 }, [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 }, }; static int hwsim_fops_ps_write(void *dat, u64 val); static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw, void *data, int len) { struct mac80211_hwsim_data *hwsim = hw->priv; struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1]; struct sk_buff *skb; int err, ps; err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len, hwsim_testmode_policy); if (err) return err; if (!tb[HWSIM_TM_ATTR_CMD]) return -EINVAL; switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) { case HWSIM_TM_CMD_SET_PS: if (!tb[HWSIM_TM_ATTR_PS]) return -EINVAL; ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]); return hwsim_fops_ps_write(hwsim, ps); case HWSIM_TM_CMD_GET_PS: skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy, nla_total_size(sizeof(u32))); if (!skb) return -ENOMEM; NLA_PUT_U32(skb, HWSIM_TM_ATTR_PS, hwsim->ps); return cfg80211_testmode_reply(skb); default: return -EOPNOTSUPP; } nla_put_failure: kfree_skb(skb); return -ENOBUFS; } #endif static const struct ieee80211_ops mac80211_hwsim_ops = { .tx = mac80211_hwsim_tx, .start = mac80211_hwsim_start, .stop = mac80211_hwsim_stop, .add_interface = mac80211_hwsim_add_interface, .remove_interface = mac80211_hwsim_remove_interface, .config = mac80211_hwsim_config, .configure_filter = mac80211_hwsim_configure_filter, .bss_info_changed = mac80211_hwsim_bss_info_changed, .sta_notify = mac80211_hwsim_sta_notify, .set_tim = mac80211_hwsim_set_tim, .conf_tx = mac80211_hwsim_conf_tx, CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd) }; static void mac80211_hwsim_free(void) { struct list_head tmplist, *i, *tmp; struct mac80211_hwsim_data *data, *tmpdata; INIT_LIST_HEAD(&tmplist); spin_lock_bh(&hwsim_radio_lock); list_for_each_safe(i, tmp, &hwsim_radios) list_move(i, &tmplist); spin_unlock_bh(&hwsim_radio_lock); list_for_each_entry_safe(data, tmpdata, &tmplist, list) { debugfs_remove(data->debugfs_group); debugfs_remove(data->debugfs_ps); debugfs_remove(data->debugfs); ieee80211_unregister_hw(data->hw); device_unregister(data->dev); ieee80211_free_hw(data->hw); } class_destroy(hwsim_class); } static struct device_driver mac80211_hwsim_driver = { .name = "mac80211_hwsim" }; static const struct net_device_ops hwsim_netdev_ops = { .ndo_start_xmit = hwsim_mon_xmit, .ndo_change_mtu = eth_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; static void hwsim_mon_setup(struct net_device *dev) { dev->netdev_ops = &hwsim_netdev_ops; dev->destructor = free_netdev; ether_setup(dev); dev->tx_queue_len = 0; dev->type = ARPHRD_IEEE80211_RADIOTAP; memset(dev->dev_addr, 0, ETH_ALEN); dev->dev_addr[0] = 0x12; } static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif) { struct mac80211_hwsim_data *data = dat; struct hwsim_vif_priv *vp = (void *)vif->drv_priv; DECLARE_MAC_BUF(buf); struct sk_buff *skb; struct ieee80211_pspoll *pspoll; if (!vp->assoc) return; printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n", wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid); skb = dev_alloc_skb(sizeof(*pspoll)); if (!skb) return; pspoll = (void *) skb_put(skb, sizeof(*pspoll)); pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL | IEEE80211_FCTL_PM); pspoll->aid = cpu_to_le16(0xc000 | vp->aid); memcpy(pspoll->bssid, vp->bssid, ETH_ALEN); memcpy(pspoll->ta, mac, ETH_ALEN); if (!mac80211_hwsim_tx_frame(data->hw, skb)) printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__); dev_kfree_skb(skb); } static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac, struct ieee80211_vif *vif, int ps) { struct hwsim_vif_priv *vp = (void *)vif->drv_priv; DECLARE_MAC_BUF(buf); struct sk_buff *skb; struct ieee80211_hdr *hdr; if (!vp->assoc) return; printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n", wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps); skb = dev_alloc_skb(sizeof(*hdr)); if (!skb) return; hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN); hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | (ps ? IEEE80211_FCTL_PM : 0)); hdr->duration_id = cpu_to_le16(0); memcpy(hdr->addr1, vp->bssid, ETH_ALEN); memcpy(hdr->addr2, mac, ETH_ALEN); memcpy(hdr->addr3, vp->bssid, ETH_ALEN); if (!mac80211_hwsim_tx_frame(data->hw, skb)) printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__); dev_kfree_skb(skb); } static void hwsim_send_nullfunc_ps(void *dat, u8 *mac, struct ieee80211_vif *vif) { struct mac80211_hwsim_data *data = dat; hwsim_send_nullfunc(data, mac, vif, 1); } static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac, struct ieee80211_vif *vif) { struct mac80211_hwsim_data *data = dat; hwsim_send_nullfunc(data, mac, vif, 0); } static int hwsim_fops_ps_read(void *dat, u64 *val) { struct mac80211_hwsim_data *data = dat; *val = data->ps; return 0; } static int hwsim_fops_ps_write(void *dat, u64 val) { struct mac80211_hwsim_data *data = dat; enum ps_mode old_ps; if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL && val != PS_MANUAL_POLL) return -EINVAL; old_ps = data->ps; data->ps = val; if (val == PS_MANUAL_POLL) { ieee80211_iterate_active_interfaces(data->hw, hwsim_send_ps_poll, data); data->ps_poll_pending = true; } else if (old_ps == PS_DISABLED && val != PS_DISABLED) { ieee80211_iterate_active_interfaces(data->hw, hwsim_send_nullfunc_ps, data); } else if (old_ps != PS_DISABLED && val == PS_DISABLED) { ieee80211_iterate_active_interfaces(data->hw, hwsim_send_nullfunc_no_ps, data); } return 0; } DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write, "%llu\n"); static int hwsim_fops_group_read(void *dat, u64 *val) { struct mac80211_hwsim_data *data = dat; *val = data->group; return 0; } static int hwsim_fops_group_write(void *dat, u64 val) { struct mac80211_hwsim_data *data = dat; data->group = val; return 0; } DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group, hwsim_fops_group_read, hwsim_fops_group_write, "%llx\n"); static int __init init_mac80211_hwsim(void) { int i, err = 0; u8 addr[ETH_ALEN]; struct mac80211_hwsim_data *data; struct ieee80211_hw *hw; enum ieee80211_band band; if (radios < 1 || radios > 100) return -EINVAL; spin_lock_init(&hwsim_radio_lock); INIT_LIST_HEAD(&hwsim_radios); hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim"); if (IS_ERR(hwsim_class)) return PTR_ERR(hwsim_class); memset(addr, 0, ETH_ALEN); addr[0] = 0x02; for (i = 0; i < radios; i++) { printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n", i); hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops); if (!hw) { printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw " "failed\n"); err = -ENOMEM; goto failed; } data = hw->priv; data->hw = hw; data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", i); if (IS_ERR(data->dev)) { printk(KERN_DEBUG "mac80211_hwsim: device_create " "failed (%ld)\n", PTR_ERR(data->dev)); err = -ENOMEM; goto failed_drvdata; } data->dev->driver = &mac80211_hwsim_driver; SET_IEEE80211_DEV(hw, data->dev); addr[3] = i >> 8; addr[4] = i; SET_IEEE80211_PERM_ADDR(hw, addr); hw->channel_change_time = 1; hw->queues = 4; hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP) | BIT(NL80211_IFTYPE_MESH_POINT); hw->flags = IEEE80211_HW_MFP_CAPABLE | IEEE80211_HW_SIGNAL_DBM; /* ask mac80211 to reserve space for magic */ hw->vif_data_size = sizeof(struct hwsim_vif_priv); hw->sta_data_size = sizeof(struct hwsim_sta_priv); memcpy(data->channels_2ghz, hwsim_channels_2ghz, sizeof(hwsim_channels_2ghz)); memcpy(data->channels_5ghz, hwsim_channels_5ghz, sizeof(hwsim_channels_5ghz)); memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates)); for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) { struct ieee80211_supported_band *sband = &data->bands[band]; switch (band) { case IEEE80211_BAND_2GHZ: sband->channels = data->channels_2ghz; sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz); break; case IEEE80211_BAND_5GHZ: sband->channels = data->channels_5ghz; sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz); break; default: break; } sband->bitrates = data->rates; sband->n_bitrates = ARRAY_SIZE(hwsim_rates); sband->ht_cap.ht_supported = true; sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 | IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_40 | IEEE80211_HT_CAP_DSSSCCK40; sband->ht_cap.ampdu_factor = 0x3; sband->ht_cap.ampdu_density = 0x6; memset(&sband->ht_cap.mcs, 0, sizeof(sband->ht_cap.mcs)); sband->ht_cap.mcs.rx_mask[0] = 0xff; sband->ht_cap.mcs.rx_mask[1] = 0xff; sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; hw->wiphy->bands[band] = sband; } /* By default all radios are belonging to the first group */ data->group = 1; /* Work to be done prior to ieee80211_register_hw() */ switch (regtest) { case HWSIM_REGTEST_DISABLED: case HWSIM_REGTEST_DRIVER_REG_FOLLOW: case HWSIM_REGTEST_DRIVER_REG_ALL: case HWSIM_REGTEST_DIFF_COUNTRY: /* * Nothing to be done for driver regulatory domain * hints prior to ieee80211_register_hw() */ break; case HWSIM_REGTEST_WORLD_ROAM: if (i == 0) { hw->wiphy->custom_regulatory = true; wiphy_apply_custom_regulatory(hw->wiphy, &hwsim_world_regdom_custom_01); } break; case HWSIM_REGTEST_CUSTOM_WORLD: hw->wiphy->custom_regulatory = true; wiphy_apply_custom_regulatory(hw->wiphy, &hwsim_world_regdom_custom_01); break; case HWSIM_REGTEST_CUSTOM_WORLD_2: if (i == 0) { hw->wiphy->custom_regulatory = true; wiphy_apply_custom_regulatory(hw->wiphy, &hwsim_world_regdom_custom_01); } else if (i == 1) { hw->wiphy->custom_regulatory = true; wiphy_apply_custom_regulatory(hw->wiphy, &hwsim_world_regdom_custom_02); } break; case HWSIM_REGTEST_STRICT_ALL: hw->wiphy->strict_regulatory = true; break; case HWSIM_REGTEST_STRICT_FOLLOW: case HWSIM_REGTEST_STRICT_AND_DRIVER_REG: if (i == 0) hw->wiphy->strict_regulatory = true; break; case HWSIM_REGTEST_ALL: if (i == 0) { hw->wiphy->custom_regulatory = true; wiphy_apply_custom_regulatory(hw->wiphy, &hwsim_world_regdom_custom_01); } else if (i == 1) { hw->wiphy->custom_regulatory = true; wiphy_apply_custom_regulatory(hw->wiphy, &hwsim_world_regdom_custom_02); } else if (i == 4) hw->wiphy->strict_regulatory = true; break; default: break; } /* give the regulatory workqueue a chance to run */ if (regtest) schedule_timeout_interruptible(1); err = ieee80211_register_hw(hw); if (err < 0) { printk(KERN_DEBUG "mac80211_hwsim: " "ieee80211_register_hw failed (%d)\n", err); goto failed_hw; } /* Work to be done after to ieee80211_register_hw() */ switch (regtest) { case HWSIM_REGTEST_WORLD_ROAM: case HWSIM_REGTEST_DISABLED: break; case HWSIM_REGTEST_DRIVER_REG_FOLLOW: if (!i) regulatory_hint(hw->wiphy, hwsim_alpha2s[0]); break; case HWSIM_REGTEST_DRIVER_REG_ALL: case HWSIM_REGTEST_STRICT_ALL: regulatory_hint(hw->wiphy, hwsim_alpha2s[0]); break; case HWSIM_REGTEST_DIFF_COUNTRY: if (i < ARRAY_SIZE(hwsim_alpha2s)) regulatory_hint(hw->wiphy, hwsim_alpha2s[i]); break; case HWSIM_REGTEST_CUSTOM_WORLD: case HWSIM_REGTEST_CUSTOM_WORLD_2: /* * Nothing to be done for custom world regulatory * domains after to ieee80211_register_hw */ break; case HWSIM_REGTEST_STRICT_FOLLOW: if (i == 0) regulatory_hint(hw->wiphy, hwsim_alpha2s[0]); break; case HWSIM_REGTEST_STRICT_AND_DRIVER_REG: if (i == 0) regulatory_hint(hw->wiphy, hwsim_alpha2s[0]); else if (i == 1) regulatory_hint(hw->wiphy, hwsim_alpha2s[1]); break; case HWSIM_REGTEST_ALL: if (i == 2) regulatory_hint(hw->wiphy, hwsim_alpha2s[0]); else if (i == 3) regulatory_hint(hw->wiphy, hwsim_alpha2s[1]); else if (i == 4) regulatory_hint(hw->wiphy, hwsim_alpha2s[2]); break; default: break; } printk(KERN_DEBUG "%s: hwaddr %pM registered\n", wiphy_name(hw->wiphy), hw->wiphy->perm_addr); data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir); data->debugfs_ps = debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps); data->debugfs_group = debugfs_create_file("group", 0666, data->debugfs, data, &hwsim_fops_group); setup_timer(&data->beacon_timer, mac80211_hwsim_beacon, (unsigned long) hw); list_add_tail(&data->list, &hwsim_radios); } hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup); if (hwsim_mon == NULL) goto failed; rtnl_lock(); err = dev_alloc_name(hwsim_mon, hwsim_mon->name); if (err < 0) goto failed_mon; err = register_netdevice(hwsim_mon); if (err < 0) goto failed_mon; rtnl_unlock(); return 0; failed_mon: rtnl_unlock(); free_netdev(hwsim_mon); mac80211_hwsim_free(); return err; failed_hw: device_unregister(data->dev); failed_drvdata: ieee80211_free_hw(hw); failed: mac80211_hwsim_free(); return err; } static void __exit exit_mac80211_hwsim(void) { printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n"); mac80211_hwsim_free(); unregister_netdev(hwsim_mon); } module_init(init_mac80211_hwsim); module_exit(exit_mac80211_hwsim);