/*
* mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
* Copyright (c) 2008, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
*
* 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
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>
#include <linux/debugfs.h>
+#include <net/genetlink.h>
+#include "mac80211_hwsim.h"
+
+#define WARN_QUEUE 100
+#define MAX_QUEUE 200
MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
MODULE_LICENSE("GPL");
+int wmediumd_pid;
static int radios = 2;
module_param(radios, int, 0444);
MODULE_PARM_DESC(radios, "Number of simulated radios");
struct dentry *debugfs;
struct dentry *debugfs_ps;
+ struct sk_buff_head pending; /* packets pending */
/*
* Only radios in the same group can communicate together (the
* channel has to match too). Each bit represents a group. A
__le16 rt_chbitmask;
} __packed;
+/* MAC80211_HWSIM netlinf family */
+static struct genl_family hwsim_genl_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = 0,
+ .name = "MAC80211_HWSIM",
+ .version = 1,
+ .maxattr = HWSIM_ATTR_MAX,
+};
+
+/* MAC80211_HWSIM netlink policy */
+
+static struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
+ [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC,
+ .len = 6*sizeof(u8) },
+ [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC,
+ .len = 6*sizeof(u8) },
+ [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
+ .len = IEEE80211_MAX_DATA_LEN },
+ [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
+ [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
+ [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
+ [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
+ .len = IEEE80211_TX_MAX_RATES*sizeof(
+ struct hwsim_tx_rate)},
+ [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
+};
static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
struct net_device *dev)
return md.ret;
}
+static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
+ struct sk_buff *my_skb,
+ int dst_pid)
+{
+ struct sk_buff *skb;
+ struct mac80211_hwsim_data *data = hw->priv;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
+ void *msg_head;
+ unsigned int hwsim_flags = 0;
+ int i;
+ struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
+
+ if (data->idle) {
+ wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
+ dev_kfree_skb(my_skb);
+ return;
+ }
+
+ if (data->ps != PS_DISABLED)
+ hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
+ /* If the queue contains MAX_QUEUE skb's drop some */
+ if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
+ /* Droping until WARN_QUEUE level */
+ while (skb_queue_len(&data->pending) >= WARN_QUEUE)
+ skb_dequeue(&data->pending);
+ }
+
+ skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (skb == NULL)
+ goto nla_put_failure;
+
+ msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
+ HWSIM_CMD_FRAME);
+ if (msg_head == NULL) {
+ printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
+ goto nla_put_failure;
+ }
+
+ NLA_PUT(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
+ sizeof(struct mac_address), data->addresses[1].addr);
-static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
- struct sk_buff *skb)
+ /* We get the skb->data */
+ NLA_PUT(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data);
+
+ /* We get the flags for this transmission, and we translate them to
+ wmediumd flags */
+
+ if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
+ hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
+
+ if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+ hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
+
+ NLA_PUT_U32(skb, HWSIM_ATTR_FLAGS, hwsim_flags);
+
+ /* We get the tx control (rate and retries) info*/
+
+ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+ tx_attempts[i].idx = info->status.rates[i].idx;
+ tx_attempts[i].count = info->status.rates[i].count;
+ }
+
+ NLA_PUT(skb, HWSIM_ATTR_TX_INFO,
+ sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
+ tx_attempts);
+
+ /* We create a cookie to identify this skb */
+ NLA_PUT_U64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb);
+
+ genlmsg_end(skb, msg_head);
+ genlmsg_unicast(&init_net, skb, dst_pid);
+
+ /* Enqueue the packet */
+ skb_queue_tail(&data->pending, my_skb);
+ return;
+
+nla_put_failure:
+ printk(KERN_DEBUG "mac80211_hwsim: error occured in %s\n", __func__);
+}
+
+static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
+ struct sk_buff *skb)
{
struct mac80211_hwsim_data *data = hw->priv, *data2;
bool ack = false;
return ack;
}
-
static void mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
bool ack;
struct ieee80211_tx_info *txi;
+ int _pid;
mac80211_hwsim_monitor_rx(hw, skb);
return;
}
- ack = mac80211_hwsim_tx_frame(hw, skb);
+ /* wmediumd mode check */
+ _pid = wmediumd_pid;
+
+ if (_pid)
+ return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
+
+ /* NO wmediumd detected, perfect medium simulation */
+ ack = mac80211_hwsim_tx_frame_no_nl(hw, skb);
+
if (ack && skb->len >= 16) {
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
mac80211_hwsim_monitor_ack(hw, hdr->addr2);
struct ieee80211_hw *hw = arg;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
+ int _pid;
hwsim_check_magic(vif);
info = IEEE80211_SKB_CB(skb);
mac80211_hwsim_monitor_rx(hw, skb);
- mac80211_hwsim_tx_frame(hw, skb);
+
+ /* wmediumd mode check */
+ _pid = wmediumd_pid;
+
+ if (_pid)
+ return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
+
+ mac80211_hwsim_tx_frame_no_nl(hw, skb);
dev_kfree_skb(skb);
}
static void mac80211_hwsim_flush(struct ieee80211_hw *hw, bool drop)
{
- /*
- * In this special case, there's nothing we need to
- * do because hwsim does transmission synchronously.
- * In the future, when it does transmissions via
- * userspace, we may need to do something.
- */
+ /* Not implemented, queues only on kernel side */
}
struct hw_scan_done {
for (i = 0; i < req->n_channels; i++)
printk(KERN_DEBUG "hwsim hw_scan freq %d\n",
req->channels[i]->center_freq);
+ print_hex_dump(KERN_DEBUG, "scan IEs: ", DUMP_PREFIX_OFFSET,
+ 16, 1, req->ie, req->ie_len, 1);
ieee80211_queue_delayed_work(hw, &hsd->w, 2 * HZ);
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
struct sk_buff *skb;
struct ieee80211_pspoll *pspoll;
+ int _pid;
if (!vp->assoc)
return;
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__);
+
+ /* wmediumd mode check */
+ _pid = wmediumd_pid;
+
+ if (_pid)
+ return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
+
+ if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
+ printk(KERN_DEBUG "%s: PS-poll frame not ack'ed\n", __func__);
dev_kfree_skb(skb);
}
struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
+ int _pid;
if (!vp->assoc)
return;
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))
+
+ /* wmediumd mode check */
+ _pid = wmediumd_pid;
+
+ if (_pid)
+ return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
+
+ if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
dev_kfree_skb(skb);
}
hwsim_fops_group_read, hwsim_fops_group_write,
"%llx\n");
+struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(
+ struct mac_address *addr)
+{
+ struct mac80211_hwsim_data *data;
+ bool _found = false;
+
+ spin_lock_bh(&hwsim_radio_lock);
+ list_for_each_entry(data, &hwsim_radios, list) {
+ if (memcmp(data->addresses[1].addr, addr,
+ sizeof(struct mac_address)) == 0) {
+ _found = true;
+ break;
+ }
+ }
+ spin_unlock_bh(&hwsim_radio_lock);
+
+ if (!_found)
+ return NULL;
+
+ return data;
+}
+
+static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
+ struct genl_info *info)
+{
+
+ struct ieee80211_hdr *hdr;
+ struct mac80211_hwsim_data *data2;
+ struct ieee80211_tx_info *txi;
+ struct hwsim_tx_rate *tx_attempts;
+ struct sk_buff __user *ret_skb;
+ struct sk_buff *skb, *tmp;
+ struct mac_address *src;
+ unsigned int hwsim_flags;
+
+ int i;
+ bool found = false;
+
+ if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
+ !info->attrs[HWSIM_ATTR_FLAGS] ||
+ !info->attrs[HWSIM_ATTR_COOKIE] ||
+ !info->attrs[HWSIM_ATTR_TX_INFO])
+ goto out;
+
+ src = (struct mac_address *)nla_data(
+ info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
+ hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
+
+ ret_skb = (struct sk_buff __user *)
+ (unsigned long) nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
+
+ data2 = get_hwsim_data_ref_from_addr(src);
+
+ if (data2 == NULL)
+ goto out;
+
+ /* look for the skb matching the cookie passed back from user */
+ skb_queue_walk_safe(&data2->pending, skb, tmp) {
+ if (skb == ret_skb) {
+ skb_unlink(skb, &data2->pending);
+ found = true;
+ break;
+ }
+ }
+
+ /* not found */
+ if (!found)
+ goto out;
+
+ /* Tx info received because the frame was broadcasted on user space,
+ so we get all the necessary info: tx attempts and skb control buff */
+
+ tx_attempts = (struct hwsim_tx_rate *)nla_data(
+ info->attrs[HWSIM_ATTR_TX_INFO]);
+
+ /* now send back TX status */
+ 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);
+
+ for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+ txi->status.rates[i].idx = tx_attempts[i].idx;
+ txi->status.rates[i].count = tx_attempts[i].count;
+ /*txi->status.rates[i].flags = 0;*/
+ }
+
+ txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
+
+ if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
+ (hwsim_flags & HWSIM_TX_STAT_ACK)) {
+ if (skb->len >= 16) {
+ hdr = (struct ieee80211_hdr *) skb->data;
+ mac80211_hwsim_monitor_ack(data2->hw, hdr->addr2);
+ }
+ }
+ ieee80211_tx_status_irqsafe(data2->hw, skb);
+ return 0;
+out:
+ return -EINVAL;
+
+}
+
+static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
+ struct genl_info *info)
+{
+
+ struct mac80211_hwsim_data *data2;
+ struct ieee80211_rx_status rx_status;
+ struct mac_address *dst;
+ int frame_data_len;
+ char *frame_data;
+ struct sk_buff *skb = NULL;
+
+ if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
+ !info->attrs[HWSIM_ATTR_FRAME] ||
+ !info->attrs[HWSIM_ATTR_RX_RATE] ||
+ !info->attrs[HWSIM_ATTR_SIGNAL])
+ goto out;
+
+ dst = (struct mac_address *)nla_data(
+ info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
+
+ frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
+ frame_data = (char *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
+
+ /* Allocate new skb here */
+ skb = alloc_skb(frame_data_len, GFP_KERNEL);
+ if (skb == NULL)
+ goto err;
+
+ if (frame_data_len <= IEEE80211_MAX_DATA_LEN) {
+ /* Copy the data */
+ memcpy(skb_put(skb, frame_data_len), frame_data,
+ frame_data_len);
+ } else
+ goto err;
+
+ data2 = get_hwsim_data_ref_from_addr(dst);
+
+ if (data2 == NULL)
+ goto out;
+
+ /* check if radio is configured properly */
+
+ if (data2->idle || !data2->started || !data2->channel)
+ goto out;
+
+ /*A frame is received from user space*/
+ memset(&rx_status, 0, sizeof(rx_status));
+ rx_status.freq = data2->channel->center_freq;
+ rx_status.band = data2->channel->band;
+ rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
+ rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
+
+ memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
+ ieee80211_rx_irqsafe(data2->hw, skb);
+
+ return 0;
+err:
+ printk(KERN_DEBUG "mac80211_hwsim: error occured in %s\n", __func__);
+ goto out;
+out:
+ dev_kfree_skb(skb);
+ return -EINVAL;
+}
+
+static int hwsim_register_received_nl(struct sk_buff *skb_2,
+ struct genl_info *info)
+{
+ if (info == NULL)
+ goto out;
+
+ wmediumd_pid = info->snd_pid;
+
+ printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
+ "switching to wmediumd mode with pid %d\n", info->snd_pid);
+
+ return 0;
+out:
+ printk(KERN_DEBUG "mac80211_hwsim: error occured in %s\n", __func__);
+ return -EINVAL;
+}
+
+/* Generic Netlink operations array */
+static struct genl_ops hwsim_ops[] = {
+ {
+ .cmd = HWSIM_CMD_REGISTER,
+ .policy = hwsim_genl_policy,
+ .doit = hwsim_register_received_nl,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = HWSIM_CMD_FRAME,
+ .policy = hwsim_genl_policy,
+ .doit = hwsim_cloned_frame_received_nl,
+ },
+ {
+ .cmd = HWSIM_CMD_TX_INFO_FRAME,
+ .policy = hwsim_genl_policy,
+ .doit = hwsim_tx_info_frame_received_nl,
+ },
+};
+
+static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
+ unsigned long state,
+ void *_notify)
+{
+ struct netlink_notify *notify = _notify;
+
+ if (state != NETLINK_URELEASE)
+ return NOTIFY_DONE;
+
+ if (notify->pid == wmediumd_pid) {
+ printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
+ " socket, switching to perfect channel medium\n");
+ wmediumd_pid = 0;
+ }
+ return NOTIFY_DONE;
+
+}
+
+static struct notifier_block hwsim_netlink_notifier = {
+ .notifier_call = mac80211_hwsim_netlink_notify,
+};
+
+static int hwsim_init_netlink(void)
+{
+ int rc;
+ printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
+
+ wmediumd_pid = 0;
+
+ rc = genl_register_family_with_ops(&hwsim_genl_family,
+ hwsim_ops, ARRAY_SIZE(hwsim_ops));
+ if (rc)
+ goto failure;
+
+ rc = netlink_register_notifier(&hwsim_netlink_notifier);
+ if (rc)
+ goto failure;
+
+ return 0;
+
+failure:
+ printk(KERN_DEBUG "mac80211_hwsim: error occured in %s\n", __func__);
+ return -EINVAL;
+}
+
+static void hwsim_exit_netlink(void)
+{
+ int ret;
+
+ printk(KERN_INFO "mac80211_hwsim: closing netlink\n");
+ /* unregister the notifier */
+ netlink_unregister_notifier(&hwsim_netlink_notifier);
+ /* unregister the family */
+ ret = genl_unregister_family(&hwsim_genl_family);
+ if (ret)
+ printk(KERN_DEBUG "mac80211_hwsim: "
+ "unregister family %i\n", ret);
+}
+
static int __init init_mac80211_hwsim(void)
{
int i, err = 0;
goto failed_drvdata;
}
data->dev->driver = &mac80211_hwsim_driver;
+ skb_queue_head_init(&data->pending);
SET_IEEE80211_DEV(hw, data->dev);
addr[3] = i >> 8;
data->group = 1;
mutex_init(&data->mutex);
+ /* Enable frame retransmissions for lossy channels */
+ hw->max_rates = 4;
+ hw->max_rate_tries = 11;
+
/* Work to be done prior to ieee80211_register_hw() */
switch (regtest) {
case HWSIM_REGTEST_DISABLED:
if (hwsim_mon == NULL)
goto failed;
- err = register_netdev(hwsim_mon);
+ 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();
+
+ err = hwsim_init_netlink();
+ if (err < 0)
+ goto failed_nl;
+
return 0;
+failed_nl:
+ printk(KERN_DEBUG "mac_80211_hwsim: failed initializing netlink\n");
+ return err;
+
failed_mon:
rtnl_unlock();
free_netdev(hwsim_mon);
{
printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
+ hwsim_exit_netlink();
+
mac80211_hwsim_free();
unregister_netdev(hwsim_mon);
}
git.openpandora.org / pandora-kernel.git / blobdiff