298 lines
7.6 KiB
C
298 lines
7.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*******************************************************************************
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Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
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Portions of this file are based on the WEP enablement code provided by the
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Host AP project hostap-drivers v0.1.3
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Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
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<j@w1.fi>
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Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
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Contact Information:
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Intel Linux Wireless <ilw@linux.intel.com>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*******************************************************************************/
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/if_arp.h>
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#include <linux/in6.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/proc_fs.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/tcp.h>
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#include <linux/types.h>
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#include <linux/wireless.h>
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#include <linux/etherdevice.h>
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#include <linux/uaccess.h>
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#include <net/net_namespace.h>
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#include <net/arp.h>
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#include "libipw.h"
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#define DRV_DESCRIPTION "802.11 data/management/control stack"
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#define DRV_NAME "libipw"
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#define DRV_PROCNAME "ieee80211"
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#define DRV_VERSION LIBIPW_VERSION
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#define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"
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MODULE_VERSION(DRV_VERSION);
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MODULE_DESCRIPTION(DRV_DESCRIPTION);
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MODULE_AUTHOR(DRV_COPYRIGHT);
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MODULE_LICENSE("GPL");
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static struct cfg80211_ops libipw_config_ops = { };
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static void *libipw_wiphy_privid = &libipw_wiphy_privid;
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static int libipw_networks_allocate(struct libipw_device *ieee)
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{
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int i, j;
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for (i = 0; i < MAX_NETWORK_COUNT; i++) {
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ieee->networks[i] = kzalloc(sizeof(struct libipw_network),
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GFP_KERNEL);
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if (!ieee->networks[i]) {
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LIBIPW_ERROR("Out of memory allocating beacons\n");
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for (j = 0; j < i; j++)
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kfree(ieee->networks[j]);
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return -ENOMEM;
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}
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}
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return 0;
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}
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static inline void libipw_networks_free(struct libipw_device *ieee)
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{
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int i;
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for (i = 0; i < MAX_NETWORK_COUNT; i++)
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kfree(ieee->networks[i]);
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}
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void libipw_networks_age(struct libipw_device *ieee,
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unsigned long age_secs)
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{
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struct libipw_network *network = NULL;
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unsigned long flags;
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unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);
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spin_lock_irqsave(&ieee->lock, flags);
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list_for_each_entry(network, &ieee->network_list, list) {
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network->last_scanned -= age_jiffies;
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}
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spin_unlock_irqrestore(&ieee->lock, flags);
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}
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EXPORT_SYMBOL(libipw_networks_age);
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static void libipw_networks_initialize(struct libipw_device *ieee)
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{
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int i;
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INIT_LIST_HEAD(&ieee->network_free_list);
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INIT_LIST_HEAD(&ieee->network_list);
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for (i = 0; i < MAX_NETWORK_COUNT; i++)
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list_add_tail(&ieee->networks[i]->list,
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&ieee->network_free_list);
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}
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struct net_device *alloc_libipw(int sizeof_priv, int monitor)
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{
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struct libipw_device *ieee;
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struct net_device *dev;
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int err;
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LIBIPW_DEBUG_INFO("Initializing...\n");
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dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv);
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if (!dev)
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goto failed;
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ieee = netdev_priv(dev);
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ieee->dev = dev;
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if (!monitor) {
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ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0);
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if (!ieee->wdev.wiphy) {
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LIBIPW_ERROR("Unable to allocate wiphy.\n");
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goto failed_free_netdev;
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}
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ieee->dev->ieee80211_ptr = &ieee->wdev;
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ieee->wdev.iftype = NL80211_IFTYPE_STATION;
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/* Fill-out wiphy structure bits we know... Not enough info
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here to call set_wiphy_dev or set MAC address or channel info
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-- have to do that in ->ndo_init... */
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ieee->wdev.wiphy->privid = libipw_wiphy_privid;
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ieee->wdev.wiphy->max_scan_ssids = 1;
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ieee->wdev.wiphy->max_scan_ie_len = 0;
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ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
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| BIT(NL80211_IFTYPE_ADHOC);
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}
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err = libipw_networks_allocate(ieee);
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if (err) {
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LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err);
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goto failed_free_wiphy;
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}
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libipw_networks_initialize(ieee);
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/* Default fragmentation threshold is maximum payload size */
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ieee->fts = DEFAULT_FTS;
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ieee->rts = DEFAULT_FTS;
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ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
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ieee->open_wep = 1;
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/* Default to enabling full open WEP with host based encrypt/decrypt */
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ieee->host_encrypt = 1;
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ieee->host_decrypt = 1;
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ieee->host_mc_decrypt = 1;
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/* Host fragmentation in Open mode. Default is enabled.
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* Note: host fragmentation is always enabled if host encryption
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* is enabled. For cards can do hardware encryption, they must do
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* hardware fragmentation as well. So we don't need a variable
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* like host_enc_frag. */
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ieee->host_open_frag = 1;
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ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
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spin_lock_init(&ieee->lock);
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lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);
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ieee->wpa_enabled = 0;
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ieee->drop_unencrypted = 0;
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ieee->privacy_invoked = 0;
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return dev;
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failed_free_wiphy:
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if (!monitor)
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wiphy_free(ieee->wdev.wiphy);
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failed_free_netdev:
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free_netdev(dev);
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failed:
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return NULL;
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}
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EXPORT_SYMBOL(alloc_libipw);
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void free_libipw(struct net_device *dev, int monitor)
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{
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struct libipw_device *ieee = netdev_priv(dev);
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lib80211_crypt_info_free(&ieee->crypt_info);
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libipw_networks_free(ieee);
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/* free cfg80211 resources */
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if (!monitor)
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wiphy_free(ieee->wdev.wiphy);
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free_netdev(dev);
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}
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EXPORT_SYMBOL(free_libipw);
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#ifdef CONFIG_LIBIPW_DEBUG
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static int debug = 0;
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u32 libipw_debug_level = 0;
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EXPORT_SYMBOL_GPL(libipw_debug_level);
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static struct proc_dir_entry *libipw_proc = NULL;
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static int debug_level_proc_show(struct seq_file *m, void *v)
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{
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seq_printf(m, "0x%08X\n", libipw_debug_level);
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return 0;
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}
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static int debug_level_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, debug_level_proc_show, NULL);
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}
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static ssize_t debug_level_proc_write(struct file *file,
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const char __user *buffer, size_t count, loff_t *pos)
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{
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char buf[] = "0x00000000\n";
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size_t len = min(sizeof(buf) - 1, count);
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unsigned long val;
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if (copy_from_user(buf, buffer, len))
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return count;
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buf[len] = 0;
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if (sscanf(buf, "%li", &val) != 1)
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printk(KERN_INFO DRV_NAME
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": %s is not in hex or decimal form.\n", buf);
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else
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libipw_debug_level = val;
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return strnlen(buf, len);
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}
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static const struct proc_ops debug_level_proc_ops = {
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.proc_open = debug_level_proc_open,
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.proc_read = seq_read,
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.proc_lseek = seq_lseek,
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.proc_release = single_release,
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.proc_write = debug_level_proc_write,
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};
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#endif /* CONFIG_LIBIPW_DEBUG */
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static int __init libipw_init(void)
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{
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#ifdef CONFIG_LIBIPW_DEBUG
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struct proc_dir_entry *e;
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libipw_debug_level = debug;
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libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net);
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if (libipw_proc == NULL) {
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LIBIPW_ERROR("Unable to create " DRV_PROCNAME
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" proc directory\n");
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return -EIO;
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}
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e = proc_create("debug_level", 0644, libipw_proc,
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&debug_level_proc_ops);
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if (!e) {
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remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
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libipw_proc = NULL;
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return -EIO;
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}
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#endif /* CONFIG_LIBIPW_DEBUG */
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printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
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printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
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return 0;
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}
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static void __exit libipw_exit(void)
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{
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#ifdef CONFIG_LIBIPW_DEBUG
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if (libipw_proc) {
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remove_proc_entry("debug_level", libipw_proc);
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remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
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libipw_proc = NULL;
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}
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#endif /* CONFIG_LIBIPW_DEBUG */
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}
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#ifdef CONFIG_LIBIPW_DEBUG
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#include <linux/moduleparam.h>
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module_param(debug, int, 0444);
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MODULE_PARM_DESC(debug, "debug output mask");
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#endif /* CONFIG_LIBIPW_DEBUG */
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module_exit(libipw_exit);
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module_init(libipw_init);
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