+++ /dev/null
-/*
- * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
- * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
- *
- * 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")
- * - IEEE 802.11a and 802.11n modes
- */
-
-#include <net/mac80211.h>
-#include <net/ieee80211_radiotap.h>
-#include <linux/if_arp.h>
-#include <linux/rtnetlink.h>
-#include <linux/etherdevice.h>
-
-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");
-
-
-static struct class *hwsim_class;
-
-static struct ieee80211_hw **hwsim_radios;
-static int hwsim_radio_count;
-static struct net_device *hwsim_mon; /* global monitor netdev */
-
-
-static const struct ieee80211_channel hwsim_channels[] = {
- { .chan = 1, .freq = 2412, .val = 1 },
- { .chan = 2, .freq = 2417, .val = 2 },
- { .chan = 3, .freq = 2422, .val = 3 },
- { .chan = 4, .freq = 2427, .val = 4 },
- { .chan = 5, .freq = 2432, .val = 5 },
- { .chan = 6, .freq = 2437, .val = 6 },
- { .chan = 7, .freq = 2442, .val = 7 },
- { .chan = 8, .freq = 2447, .val = 8 },
- { .chan = 9, .freq = 2452, .val = 9 },
- { .chan = 10, .freq = 2457, .val = 10 },
- { .chan = 11, .freq = 2462, .val = 11 },
- { .chan = 12, .freq = 2467, .val = 12 },
- { .chan = 13, .freq = 2472, .val = 13 },
- { .chan = 14, .freq = 2484, .val = 14 },
-};
-
-static const struct ieee80211_rate hwsim_rates[] = {
- { .rate = 10, .val = 10, .flags = IEEE80211_RATE_CCK },
- { .rate = 20, .val = 20, .val2 = 21, .flags = IEEE80211_RATE_CCK_2 },
- { .rate = 55, .val = 55, .val2 = 56, .flags = IEEE80211_RATE_CCK_2 },
- { .rate = 110, .val = 110, .val2 = 111,
- .flags = IEEE80211_RATE_CCK_2 },
- { .rate = 60, .val = 60, .flags = IEEE80211_RATE_OFDM },
- { .rate = 90, .val = 90, .flags = IEEE80211_RATE_OFDM },
- { .rate = 120, .val = 120, .flags = IEEE80211_RATE_OFDM },
- { .rate = 180, .val = 180, .flags = IEEE80211_RATE_OFDM },
- { .rate = 240, .val = 240, .flags = IEEE80211_RATE_OFDM },
- { .rate = 360, .val = 360, .flags = IEEE80211_RATE_OFDM },
- { .rate = 480, .val = 480, .flags = IEEE80211_RATE_OFDM },
- { .rate = 540, .val = 540, .flags = IEEE80211_RATE_OFDM }
-};
-
-struct mac80211_hwsim_data {
- struct device *dev;
- struct ieee80211_hw_mode modes[1];
- struct ieee80211_channel channels[ARRAY_SIZE(hwsim_channels)];
- struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
-
- int freq;
- int channel;
- enum ieee80211_phymode phymode;
- int radio_enabled;
- unsigned long beacon_int; /* in jiffies unit */
- unsigned int rx_filter;
- int started;
- struct timer_list beacon_timer;
-};
-
-
-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 0;
-}
-
-
-static void mac80211_hwsim_monitor_rx(struct mac80211_hwsim_data *data,
- struct sk_buff *tx_skb,
- struct ieee80211_tx_control *control)
-{
- struct sk_buff *skb;
- struct hwsim_radiotap_hdr *hdr;
- u16 flags;
-
- 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 = __constant_cpu_to_le32(
- (1 << IEEE80211_RADIOTAP_FLAGS) |
- (1 << IEEE80211_RADIOTAP_RATE) |
- (1 << IEEE80211_RADIOTAP_CHANNEL));
- hdr->rt_flags = 0;
- hdr->rt_rate = control->tx_rate / 5;
- hdr->rt_channel = data->freq;
- flags = IEEE80211_CHAN_2GHZ;
- if (control->rate->flags & IEEE80211_RATE_OFDM)
- flags |= IEEE80211_CHAN_OFDM;
- if (control->rate->flags & IEEE80211_RATE_CCK)
- 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 = __constant_htons(ETH_P_802_2);
- memset(skb->cb, 0, sizeof(skb->cb));
- netif_rx(skb);
-}
-
-
-static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
- struct ieee80211_tx_control *control)
-{
- struct mac80211_hwsim_data *data = hw->priv;
- struct ieee80211_tx_status tx_status;
- struct ieee80211_rx_status rx_status;
- int i, ack = 0;
- struct ieee80211_hdr *hdr;
-
- mac80211_hwsim_monitor_rx(data, skb, control);
-
- if (skb->len < 10) {
- /* Should not happen; just a sanity check for addr1 use */
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- if (!data->radio_enabled) {
- printk(KERN_DEBUG "%s: dropped TX frame since radio "
- "disabled\n", wiphy_name(hw->wiphy));
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- hdr = (struct ieee80211_hdr *) skb->data;
- if (is_multicast_ether_addr(hdr->addr1))
- ack = 1;
-
- memset(&rx_status, 0, sizeof(rx_status));
- /* TODO: set mactime */
- rx_status.freq = data->freq;
- rx_status.channel = data->channel;
- rx_status.phymode = data->phymode;
- rx_status.rate = control->tx_rate;
- /* TODO: simulate signal strength (and optional packet drop) */
-
- /* Copy skb to all enabled radios that are on the current frequency */
- for (i = 0; i < hwsim_radio_count; i++) {
- struct mac80211_hwsim_data *data2;
- struct sk_buff *nskb;
-
- if (hwsim_radios[i] == NULL || hwsim_radios[i] == hw)
- continue;
- data2 = hwsim_radios[i]->priv;
- if (!data2->started || !data2->radio_enabled ||
- data->freq != data2->freq)
- continue;
-
- nskb = skb_copy(skb, GFP_ATOMIC);
- if (nskb == NULL)
- continue;
-
- if (memcmp(hdr->addr1, hwsim_radios[i]->wiphy->perm_addr,
- ETH_ALEN) == 0)
- ack = 1;
- ieee80211_rx_irqsafe(hwsim_radios[i], nskb, &rx_status);
- }
-
- memset(&tx_status, 0, sizeof(tx_status));
- memcpy(&tx_status.control, control, sizeof(*control));
- tx_status.flags = ack ? IEEE80211_TX_STATUS_ACK : 0;
- ieee80211_tx_status_irqsafe(hw, skb, &tx_status);
- 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;
- 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)
-{
- DECLARE_MAC_BUF(mac);
- printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n",
- wiphy_name(hw->wiphy), __func__, conf->type,
- print_mac(mac, conf->mac_addr));
- return 0;
-}
-
-
-static void mac80211_hwsim_remove_interface(
- struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf)
-{
- DECLARE_MAC_BUF(mac);
- printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%s)\n",
- wiphy_name(hw->wiphy), __func__, conf->type,
- print_mac(mac, conf->mac_addr));
-}
-
-
-static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
- struct ieee80211_vif *vif)
-{
- struct ieee80211_hw *hw = arg;
- struct mac80211_hwsim_data *data = hw->priv;
- struct ieee80211_tx_control control;
- struct sk_buff *skb;
- struct ieee80211_rx_status rx_status;
- int i;
-
- if (vif->type != IEEE80211_IF_TYPE_AP)
- return;
-
- skb = ieee80211_beacon_get(hw, vif, &control);
- if (skb == NULL)
- return;
-
- mac80211_hwsim_monitor_rx(data, skb, &control);
-
- memset(&rx_status, 0, sizeof(rx_status));
- /* TODO: set mactime */
- rx_status.freq = data->freq;
- rx_status.channel = data->channel;
- rx_status.phymode = data->phymode;
- rx_status.rate = control.tx_rate;
- /* TODO: simulate signal strength (and optional packet drop) */
-
- /* Copy skb to all enabled radios that are on the current frequency */
- for (i = 0; i < hwsim_radio_count; i++) {
- struct mac80211_hwsim_data *data2;
- struct sk_buff *nskb;
-
- if (hwsim_radios[i] == NULL || hwsim_radios[i] == hw)
- continue;
- data2 = hwsim_radios[i]->priv;
- if (!data2->started || !data2->radio_enabled ||
- data->freq != data2->freq)
- continue;
-
- nskb = skb_copy(skb, GFP_ATOMIC);
- if (nskb == NULL)
- continue;
-
- ieee80211_rx_irqsafe(hwsim_radios[i], nskb, &rx_status);
- }
-
- 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 || !data->radio_enabled)
- return;
-
- ieee80211_iterate_active_interfaces(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,
- struct ieee80211_conf *conf)
-{
- struct mac80211_hwsim_data *data = hw->priv;
-
- printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d beacon_int=%d)\n",
- wiphy_name(hw->wiphy), __func__,
- conf->freq, conf->radio_enabled, conf->beacon_int);
-
- data->freq = conf->freq;
- data->channel = conf->channel;
- data->phymode = conf->phymode;
- data->radio_enabled = conf->radio_enabled;
- data->beacon_int = 1024 * conf->beacon_int / 1000 * HZ / 1000;
- if (data->beacon_int < 1)
- data->beacon_int = 1;
-
- if (!data->started || !data->radio_enabled)
- 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 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,
-};
-
-
-static void mac80211_hwsim_free(void)
-{
- int i;
-
- for (i = 0; i < hwsim_radio_count; i++) {
- if (hwsim_radios[i]) {
- struct mac80211_hwsim_data *data;
- data = hwsim_radios[i]->priv;
- ieee80211_unregister_hw(hwsim_radios[i]);
- if (!IS_ERR(data->dev))
- device_unregister(data->dev);
- ieee80211_free_hw(hwsim_radios[i]);
- }
- }
- kfree(hwsim_radios);
- class_destroy(hwsim_class);
-}
-
-
-static struct device_driver mac80211_hwsim_driver = {
- .name = "mac80211_hwsim"
-};
-
-
-static void hwsim_mon_setup(struct net_device *dev)
-{
- dev->hard_start_xmit = hwsim_mon_xmit;
- 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 int __init init_mac80211_hwsim(void)
-{
- int i, err = 0;
- u8 addr[ETH_ALEN];
- struct mac80211_hwsim_data *data;
- struct ieee80211_hw *hw;
- DECLARE_MAC_BUF(mac);
-
- if (radios < 1 || radios > 65535)
- return -EINVAL;
-
- hwsim_radio_count = radios;
- hwsim_radios = kcalloc(hwsim_radio_count,
- sizeof(struct ieee80211_hw *), GFP_KERNEL);
- if (hwsim_radios == NULL)
- return -ENOMEM;
-
- hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
- if (IS_ERR(hwsim_class)) {
- kfree(hwsim_radios);
- return PTR_ERR(hwsim_class);
- }
-
- memset(addr, 0, ETH_ALEN);
- addr[0] = 0x02;
-
- for (i = 0; i < hwsim_radio_count; i++) {
- printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
- i);
- hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
- if (hw == NULL) {
- printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
- "failed\n");
- err = -ENOMEM;
- goto failed;
- }
- hwsim_radios[i] = hw;
-
- data = hw->priv;
- data->dev = device_create(hwsim_class, NULL, 0, "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;
- }
- data->dev->driver = &mac80211_hwsim_driver;
- dev_set_drvdata(data->dev, hw);
-
- 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 = 1;
-
- memcpy(data->channels, hwsim_channels, sizeof(hwsim_channels));
- memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
- data->modes[0].channels = data->channels;
- data->modes[0].rates = data->rates;
- data->modes[0].mode = MODE_IEEE80211G;
- data->modes[0].num_channels = ARRAY_SIZE(hwsim_channels);
- data->modes[0].num_rates = ARRAY_SIZE(hwsim_rates);
-
- err = ieee80211_register_hwmode(hw, data->modes);
- if (err < 0) {
- printk(KERN_DEBUG "mac80211_hwsim: "
- "ieee80211_register_hwmode failed (%d)\n", err);
- goto failed;
- }
-
- err = ieee80211_register_hw(hw);
- if (err < 0) {
- printk(KERN_DEBUG "mac80211_hwsim: "
- "ieee80211_register_hw failed (%d)\n", err);
- goto failed;
- }
-
- printk(KERN_DEBUG "%s: hwaddr %s registered\n",
- wiphy_name(hw->wiphy),
- print_mac(mac, hw->wiphy->perm_addr));
-
- setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
- (unsigned long) hw);
- }
-
- 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);
-
-failed:
- mac80211_hwsim_free();
- return err;
-}
-
-
-static void __exit exit_mac80211_hwsim(void)
-{
- printk(KERN_DEBUG "mac80211_hwsim: unregister %d radios\n",
- hwsim_radio_count);
-
- unregister_netdev(hwsim_mon);
- mac80211_hwsim_free();
-}
-
-
-module_init(init_mac80211_hwsim);
-module_exit(exit_mac80211_hwsim);
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