Jouni Malinen | acc1e7a | 2008-06-11 10:42:31 +0300 | [diff] [blame] | 1 | /* |
| 2 | * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211 |
| 3 | * Copyright (c) 2008, Jouni Malinen <j@w1.fi> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * TODO: |
| 12 | * - IBSS mode simulation (Beacon transmission with competition for "air time") |
| 13 | * - IEEE 802.11a and 802.11n modes |
| 14 | * - RX filtering based on filter configuration (data->rx_filter) |
| 15 | */ |
| 16 | |
| 17 | #include <net/mac80211.h> |
| 18 | #include <net/ieee80211_radiotap.h> |
| 19 | #include <linux/if_arp.h> |
| 20 | #include <linux/rtnetlink.h> |
| 21 | #include <linux/etherdevice.h> |
| 22 | |
| 23 | MODULE_AUTHOR("Jouni Malinen"); |
| 24 | MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211"); |
| 25 | MODULE_LICENSE("GPL"); |
| 26 | |
| 27 | static int radios = 2; |
| 28 | module_param(radios, int, 0444); |
| 29 | MODULE_PARM_DESC(radios, "Number of simulated radios"); |
| 30 | |
| 31 | |
| 32 | static struct class *hwsim_class; |
| 33 | |
| 34 | static struct ieee80211_hw **hwsim_radios; |
| 35 | static int hwsim_radio_count; |
| 36 | static struct net_device *hwsim_mon; /* global monitor netdev */ |
| 37 | |
| 38 | |
| 39 | static const struct ieee80211_channel hwsim_channels[] = { |
| 40 | { .center_freq = 2412 }, |
| 41 | { .center_freq = 2417 }, |
| 42 | { .center_freq = 2422 }, |
| 43 | { .center_freq = 2427 }, |
| 44 | { .center_freq = 2432 }, |
| 45 | { .center_freq = 2437 }, |
| 46 | { .center_freq = 2442 }, |
| 47 | { .center_freq = 2447 }, |
| 48 | { .center_freq = 2452 }, |
| 49 | { .center_freq = 2457 }, |
| 50 | { .center_freq = 2462 }, |
| 51 | { .center_freq = 2467 }, |
| 52 | { .center_freq = 2472 }, |
| 53 | { .center_freq = 2484 }, |
| 54 | }; |
| 55 | |
| 56 | static const struct ieee80211_rate hwsim_rates[] = { |
| 57 | { .bitrate = 10 }, |
| 58 | { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
| 59 | { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
| 60 | { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
| 61 | { .bitrate = 60 }, |
| 62 | { .bitrate = 90 }, |
| 63 | { .bitrate = 120 }, |
| 64 | { .bitrate = 180 }, |
| 65 | { .bitrate = 240 }, |
| 66 | { .bitrate = 360 }, |
| 67 | { .bitrate = 480 }, |
| 68 | { .bitrate = 540 } |
| 69 | }; |
| 70 | |
| 71 | struct mac80211_hwsim_data { |
| 72 | struct device *dev; |
| 73 | struct ieee80211_supported_band band; |
| 74 | struct ieee80211_channel channels[ARRAY_SIZE(hwsim_channels)]; |
| 75 | struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)]; |
| 76 | |
| 77 | struct ieee80211_channel *channel; |
| 78 | int radio_enabled; |
| 79 | unsigned long beacon_int; /* in jiffies unit */ |
| 80 | unsigned int rx_filter; |
| 81 | int started; |
| 82 | struct timer_list beacon_timer; |
| 83 | }; |
| 84 | |
| 85 | |
| 86 | struct hwsim_radiotap_hdr { |
| 87 | struct ieee80211_radiotap_header hdr; |
| 88 | u8 rt_flags; |
| 89 | u8 rt_rate; |
| 90 | __le16 rt_channel; |
| 91 | __le16 rt_chbitmask; |
| 92 | } __attribute__ ((packed)); |
| 93 | |
| 94 | |
| 95 | static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev) |
| 96 | { |
| 97 | /* TODO: allow packet injection */ |
| 98 | dev_kfree_skb(skb); |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw, |
| 104 | struct sk_buff *tx_skb) |
| 105 | { |
| 106 | struct mac80211_hwsim_data *data = hw->priv; |
| 107 | struct sk_buff *skb; |
| 108 | struct hwsim_radiotap_hdr *hdr; |
| 109 | u16 flags; |
| 110 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb); |
| 111 | struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info); |
| 112 | |
| 113 | if (!netif_running(hwsim_mon)) |
| 114 | return; |
| 115 | |
| 116 | skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC); |
| 117 | if (skb == NULL) |
| 118 | return; |
| 119 | |
| 120 | hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr)); |
| 121 | hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION; |
| 122 | hdr->hdr.it_pad = 0; |
| 123 | hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr)); |
Jouni Malinen | f248f10 | 2008-06-13 19:44:47 +0300 | [diff] [blame^] | 124 | hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | |
| 125 | (1 << IEEE80211_RADIOTAP_RATE) | |
| 126 | (1 << IEEE80211_RADIOTAP_CHANNEL)); |
Jouni Malinen | acc1e7a | 2008-06-11 10:42:31 +0300 | [diff] [blame] | 127 | hdr->rt_flags = 0; |
| 128 | hdr->rt_rate = txrate->bitrate / 5; |
| 129 | hdr->rt_channel = data->channel->center_freq; |
| 130 | flags = IEEE80211_CHAN_2GHZ; |
| 131 | if (txrate->flags & IEEE80211_RATE_ERP_G) |
| 132 | flags |= IEEE80211_CHAN_OFDM; |
| 133 | else |
| 134 | flags |= IEEE80211_CHAN_CCK; |
| 135 | hdr->rt_chbitmask = cpu_to_le16(flags); |
| 136 | |
| 137 | skb->dev = hwsim_mon; |
| 138 | skb_set_mac_header(skb, 0); |
| 139 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 140 | skb->pkt_type = PACKET_OTHERHOST; |
Jouni Malinen | f248f10 | 2008-06-13 19:44:47 +0300 | [diff] [blame^] | 141 | skb->protocol = htons(ETH_P_802_2); |
Jouni Malinen | acc1e7a | 2008-06-11 10:42:31 +0300 | [diff] [blame] | 142 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 143 | netif_rx(skb); |
| 144 | } |
| 145 | |
| 146 | |
| 147 | static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
| 148 | { |
| 149 | struct mac80211_hwsim_data *data = hw->priv; |
| 150 | struct ieee80211_rx_status rx_status; |
| 151 | int i, ack = 0; |
| 152 | struct ieee80211_hdr *hdr; |
| 153 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 154 | struct ieee80211_tx_info *txi; |
| 155 | |
| 156 | mac80211_hwsim_monitor_rx(hw, skb); |
| 157 | |
| 158 | if (skb->len < 10) { |
| 159 | /* Should not happen; just a sanity check for addr1 use */ |
| 160 | dev_kfree_skb(skb); |
| 161 | return NETDEV_TX_OK; |
| 162 | } |
| 163 | |
| 164 | if (!data->radio_enabled) { |
| 165 | printk(KERN_DEBUG "%s: dropped TX frame since radio " |
| 166 | "disabled\n", wiphy_name(hw->wiphy)); |
| 167 | dev_kfree_skb(skb); |
| 168 | return NETDEV_TX_OK; |
| 169 | } |
| 170 | |
| 171 | hdr = (struct ieee80211_hdr *) skb->data; |
| 172 | |
| 173 | memset(&rx_status, 0, sizeof(rx_status)); |
| 174 | /* TODO: set mactime */ |
| 175 | rx_status.freq = data->channel->center_freq; |
| 176 | rx_status.band = data->channel->band; |
| 177 | rx_status.rate_idx = info->tx_rate_idx; |
| 178 | /* TODO: simulate signal strength (and optional packet drop) */ |
| 179 | |
| 180 | /* Copy skb to all enabled radios that are on the current frequency */ |
| 181 | for (i = 0; i < hwsim_radio_count; i++) { |
| 182 | struct mac80211_hwsim_data *data2; |
| 183 | struct sk_buff *nskb; |
| 184 | |
| 185 | if (hwsim_radios[i] == NULL || hwsim_radios[i] == hw) |
| 186 | continue; |
| 187 | data2 = hwsim_radios[i]->priv; |
| 188 | if (!data2->started || !data2->radio_enabled || |
| 189 | data->channel->center_freq != data2->channel->center_freq) |
| 190 | continue; |
| 191 | |
| 192 | nskb = skb_copy(skb, GFP_ATOMIC); |
| 193 | if (nskb == NULL) |
| 194 | continue; |
| 195 | |
| 196 | if (memcmp(hdr->addr1, hwsim_radios[i]->wiphy->perm_addr, |
| 197 | ETH_ALEN) == 0) |
| 198 | ack = 1; |
| 199 | ieee80211_rx_irqsafe(hwsim_radios[i], nskb, &rx_status); |
| 200 | } |
| 201 | |
| 202 | txi = IEEE80211_SKB_CB(skb); |
| 203 | memset(&txi->status, 0, sizeof(txi->status)); |
| 204 | if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK)) { |
| 205 | if (ack) |
| 206 | txi->flags |= IEEE80211_TX_STAT_ACK; |
| 207 | else |
| 208 | txi->status.excessive_retries = 1; |
| 209 | } |
| 210 | ieee80211_tx_status_irqsafe(hw, skb); |
| 211 | return NETDEV_TX_OK; |
| 212 | } |
| 213 | |
| 214 | |
| 215 | static int mac80211_hwsim_start(struct ieee80211_hw *hw) |
| 216 | { |
| 217 | struct mac80211_hwsim_data *data = hw->priv; |
| 218 | printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__); |
| 219 | data->started = 1; |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | |
| 224 | static void mac80211_hwsim_stop(struct ieee80211_hw *hw) |
| 225 | { |
| 226 | struct mac80211_hwsim_data *data = hw->priv; |
| 227 | data->started = 0; |
| 228 | printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__); |
| 229 | } |
| 230 | |
| 231 | |
| 232 | static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw, |
| 233 | struct ieee80211_if_init_conf *conf) |
| 234 | { |
| 235 | DECLARE_MAC_BUF(mac); |
| 236 | printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n", |
| 237 | wiphy_name(hw->wiphy), __func__, conf->type, |
| 238 | print_mac(mac, conf->mac_addr)); |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | static void mac80211_hwsim_remove_interface( |
| 244 | struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) |
| 245 | { |
| 246 | DECLARE_MAC_BUF(mac); |
| 247 | printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n", |
| 248 | wiphy_name(hw->wiphy), __func__, conf->type, |
| 249 | print_mac(mac, conf->mac_addr)); |
| 250 | } |
| 251 | |
| 252 | |
| 253 | static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac, |
| 254 | struct ieee80211_vif *vif) |
| 255 | { |
| 256 | struct ieee80211_hw *hw = arg; |
| 257 | struct mac80211_hwsim_data *data = hw->priv; |
| 258 | struct sk_buff *skb; |
| 259 | struct ieee80211_rx_status rx_status; |
| 260 | int i; |
| 261 | struct ieee80211_tx_info *info; |
| 262 | |
| 263 | if (vif->type != IEEE80211_IF_TYPE_AP) |
| 264 | return; |
| 265 | |
| 266 | skb = ieee80211_beacon_get(hw, vif); |
| 267 | if (skb == NULL) |
| 268 | return; |
| 269 | info = IEEE80211_SKB_CB(skb); |
| 270 | |
| 271 | mac80211_hwsim_monitor_rx(hw, skb); |
| 272 | |
| 273 | memset(&rx_status, 0, sizeof(rx_status)); |
| 274 | /* TODO: set mactime */ |
| 275 | rx_status.freq = data->channel->center_freq; |
| 276 | rx_status.band = data->channel->band; |
| 277 | rx_status.rate_idx = info->tx_rate_idx; |
| 278 | /* TODO: simulate signal strength (and optional packet drop) */ |
| 279 | |
| 280 | /* Copy skb to all enabled radios that are on the current frequency */ |
| 281 | for (i = 0; i < hwsim_radio_count; i++) { |
| 282 | struct mac80211_hwsim_data *data2; |
| 283 | struct sk_buff *nskb; |
| 284 | |
| 285 | if (hwsim_radios[i] == NULL || hwsim_radios[i] == hw) |
| 286 | continue; |
| 287 | data2 = hwsim_radios[i]->priv; |
| 288 | if (!data2->started || !data2->radio_enabled || |
| 289 | data->channel->center_freq != data2->channel->center_freq) |
| 290 | continue; |
| 291 | |
| 292 | nskb = skb_copy(skb, GFP_ATOMIC); |
| 293 | if (nskb == NULL) |
| 294 | continue; |
| 295 | |
| 296 | ieee80211_rx_irqsafe(hwsim_radios[i], nskb, &rx_status); |
| 297 | } |
| 298 | |
| 299 | dev_kfree_skb(skb); |
| 300 | } |
| 301 | |
| 302 | |
| 303 | static void mac80211_hwsim_beacon(unsigned long arg) |
| 304 | { |
| 305 | struct ieee80211_hw *hw = (struct ieee80211_hw *) arg; |
| 306 | struct mac80211_hwsim_data *data = hw->priv; |
| 307 | |
| 308 | if (!data->started || !data->radio_enabled) |
| 309 | return; |
| 310 | |
Jouni Malinen | f248f10 | 2008-06-13 19:44:47 +0300 | [diff] [blame^] | 311 | ieee80211_iterate_active_interfaces_atomic( |
| 312 | hw, mac80211_hwsim_beacon_tx, hw); |
Jouni Malinen | acc1e7a | 2008-06-11 10:42:31 +0300 | [diff] [blame] | 313 | |
| 314 | data->beacon_timer.expires = jiffies + data->beacon_int; |
| 315 | add_timer(&data->beacon_timer); |
| 316 | } |
| 317 | |
| 318 | |
| 319 | static int mac80211_hwsim_config(struct ieee80211_hw *hw, |
| 320 | struct ieee80211_conf *conf) |
| 321 | { |
| 322 | struct mac80211_hwsim_data *data = hw->priv; |
| 323 | |
| 324 | printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d beacon_int=%d)\n", |
| 325 | wiphy_name(hw->wiphy), __func__, |
| 326 | conf->channel->center_freq, conf->radio_enabled, |
| 327 | conf->beacon_int); |
| 328 | |
| 329 | data->channel = conf->channel; |
| 330 | data->radio_enabled = conf->radio_enabled; |
| 331 | data->beacon_int = 1024 * conf->beacon_int / 1000 * HZ / 1000; |
| 332 | if (data->beacon_int < 1) |
| 333 | data->beacon_int = 1; |
| 334 | |
| 335 | if (!data->started || !data->radio_enabled) |
| 336 | del_timer(&data->beacon_timer); |
| 337 | else |
| 338 | mod_timer(&data->beacon_timer, jiffies + data->beacon_int); |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | |
| 344 | static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw, |
| 345 | unsigned int changed_flags, |
| 346 | unsigned int *total_flags, |
| 347 | int mc_count, |
| 348 | struct dev_addr_list *mc_list) |
| 349 | { |
| 350 | struct mac80211_hwsim_data *data = hw->priv; |
| 351 | |
| 352 | printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__); |
| 353 | |
| 354 | data->rx_filter = 0; |
| 355 | if (*total_flags & FIF_PROMISC_IN_BSS) |
| 356 | data->rx_filter |= FIF_PROMISC_IN_BSS; |
| 357 | if (*total_flags & FIF_ALLMULTI) |
| 358 | data->rx_filter |= FIF_ALLMULTI; |
| 359 | |
| 360 | *total_flags = data->rx_filter; |
| 361 | } |
| 362 | |
| 363 | |
| 364 | |
| 365 | static const struct ieee80211_ops mac80211_hwsim_ops = |
| 366 | { |
| 367 | .tx = mac80211_hwsim_tx, |
| 368 | .start = mac80211_hwsim_start, |
| 369 | .stop = mac80211_hwsim_stop, |
| 370 | .add_interface = mac80211_hwsim_add_interface, |
| 371 | .remove_interface = mac80211_hwsim_remove_interface, |
| 372 | .config = mac80211_hwsim_config, |
| 373 | .configure_filter = mac80211_hwsim_configure_filter, |
| 374 | }; |
| 375 | |
| 376 | |
| 377 | static void mac80211_hwsim_free(void) |
| 378 | { |
| 379 | int i; |
| 380 | |
| 381 | for (i = 0; i < hwsim_radio_count; i++) { |
| 382 | if (hwsim_radios[i]) { |
| 383 | struct mac80211_hwsim_data *data; |
| 384 | data = hwsim_radios[i]->priv; |
| 385 | ieee80211_unregister_hw(hwsim_radios[i]); |
| 386 | if (!IS_ERR(data->dev)) |
| 387 | device_unregister(data->dev); |
| 388 | ieee80211_free_hw(hwsim_radios[i]); |
| 389 | } |
| 390 | } |
| 391 | kfree(hwsim_radios); |
| 392 | class_destroy(hwsim_class); |
| 393 | } |
| 394 | |
| 395 | |
| 396 | static struct device_driver mac80211_hwsim_driver = { |
| 397 | .name = "mac80211_hwsim" |
| 398 | }; |
| 399 | |
| 400 | |
| 401 | static void hwsim_mon_setup(struct net_device *dev) |
| 402 | { |
| 403 | dev->hard_start_xmit = hwsim_mon_xmit; |
| 404 | dev->destructor = free_netdev; |
| 405 | ether_setup(dev); |
| 406 | dev->tx_queue_len = 0; |
| 407 | dev->type = ARPHRD_IEEE80211_RADIOTAP; |
| 408 | memset(dev->dev_addr, 0, ETH_ALEN); |
| 409 | dev->dev_addr[0] = 0x12; |
| 410 | } |
| 411 | |
| 412 | |
| 413 | static int __init init_mac80211_hwsim(void) |
| 414 | { |
| 415 | int i, err = 0; |
| 416 | u8 addr[ETH_ALEN]; |
| 417 | struct mac80211_hwsim_data *data; |
| 418 | struct ieee80211_hw *hw; |
| 419 | DECLARE_MAC_BUF(mac); |
| 420 | |
| 421 | if (radios < 1 || radios > 65535) |
| 422 | return -EINVAL; |
| 423 | |
| 424 | hwsim_radio_count = radios; |
| 425 | hwsim_radios = kcalloc(hwsim_radio_count, |
| 426 | sizeof(struct ieee80211_hw *), GFP_KERNEL); |
| 427 | if (hwsim_radios == NULL) |
| 428 | return -ENOMEM; |
| 429 | |
| 430 | hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim"); |
| 431 | if (IS_ERR(hwsim_class)) { |
| 432 | kfree(hwsim_radios); |
| 433 | return PTR_ERR(hwsim_class); |
| 434 | } |
| 435 | |
| 436 | memset(addr, 0, ETH_ALEN); |
| 437 | addr[0] = 0x02; |
| 438 | |
| 439 | for (i = 0; i < hwsim_radio_count; i++) { |
| 440 | printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n", |
| 441 | i); |
| 442 | hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops); |
| 443 | if (hw == NULL) { |
| 444 | printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw " |
| 445 | "failed\n"); |
| 446 | err = -ENOMEM; |
| 447 | goto failed; |
| 448 | } |
| 449 | hwsim_radios[i] = hw; |
| 450 | |
| 451 | data = hw->priv; |
| 452 | data->dev = device_create(hwsim_class, NULL, 0, "hwsim%d", i); |
| 453 | if (IS_ERR(data->dev)) { |
| 454 | printk(KERN_DEBUG "mac80211_hwsim: device_create " |
| 455 | "failed (%ld)\n", PTR_ERR(data->dev)); |
| 456 | err = -ENOMEM; |
| 457 | goto failed; |
| 458 | } |
| 459 | data->dev->driver = &mac80211_hwsim_driver; |
| 460 | dev_set_drvdata(data->dev, hw); |
| 461 | |
| 462 | SET_IEEE80211_DEV(hw, data->dev); |
| 463 | addr[3] = i >> 8; |
| 464 | addr[4] = i; |
| 465 | SET_IEEE80211_PERM_ADDR(hw, addr); |
| 466 | |
| 467 | hw->channel_change_time = 1; |
| 468 | hw->queues = 1; |
| 469 | |
| 470 | memcpy(data->channels, hwsim_channels, sizeof(hwsim_channels)); |
| 471 | memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates)); |
| 472 | data->band.channels = data->channels; |
| 473 | data->band.n_channels = ARRAY_SIZE(hwsim_channels); |
| 474 | data->band.bitrates = data->rates; |
| 475 | data->band.n_bitrates = ARRAY_SIZE(hwsim_rates); |
| 476 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &data->band; |
| 477 | |
| 478 | err = ieee80211_register_hw(hw); |
| 479 | if (err < 0) { |
| 480 | printk(KERN_DEBUG "mac80211_hwsim: " |
| 481 | "ieee80211_register_hw failed (%d)\n", err); |
| 482 | goto failed; |
| 483 | } |
| 484 | |
| 485 | printk(KERN_DEBUG "%s: hwaddr %s registered\n", |
| 486 | wiphy_name(hw->wiphy), |
| 487 | print_mac(mac, hw->wiphy->perm_addr)); |
| 488 | |
| 489 | setup_timer(&data->beacon_timer, mac80211_hwsim_beacon, |
| 490 | (unsigned long) hw); |
| 491 | } |
| 492 | |
| 493 | hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup); |
| 494 | if (hwsim_mon == NULL) |
| 495 | goto failed; |
| 496 | |
| 497 | rtnl_lock(); |
| 498 | |
| 499 | err = dev_alloc_name(hwsim_mon, hwsim_mon->name); |
| 500 | if (err < 0) { |
| 501 | goto failed_mon; |
| 502 | } |
| 503 | |
| 504 | err = register_netdevice(hwsim_mon); |
| 505 | if (err < 0) |
| 506 | goto failed_mon; |
| 507 | |
| 508 | rtnl_unlock(); |
| 509 | |
| 510 | return 0; |
| 511 | |
| 512 | failed_mon: |
| 513 | rtnl_unlock(); |
| 514 | free_netdev(hwsim_mon); |
| 515 | |
| 516 | failed: |
| 517 | mac80211_hwsim_free(); |
| 518 | return err; |
| 519 | } |
| 520 | |
| 521 | |
| 522 | static void __exit exit_mac80211_hwsim(void) |
| 523 | { |
| 524 | printk(KERN_DEBUG "mac80211_hwsim: unregister %d radios\n", |
| 525 | hwsim_radio_count); |
| 526 | |
| 527 | unregister_netdev(hwsim_mon); |
| 528 | mac80211_hwsim_free(); |
| 529 | } |
| 530 | |
| 531 | |
| 532 | module_init(init_mac80211_hwsim); |
| 533 | module_exit(exit_mac80211_hwsim); |