drivers/staging/rtl8192e/rtllib_module.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright(c) 2004 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are based on the WEP enablement code provided by the
   6  * Host AP project hostap-drivers v0.1.3
   7  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   8  * <jkmaline@cc.hut.fi>
   9  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
  10  *
  11  * Contact Information:
  12  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  13  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  14  */
  15
  16 #include <linux/compiler.h>
  17 #include <linux/errno.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/in6.h>
  20 #include <linux/in.h>
  21 #include <linux/ip.h>
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/pci.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/slab.h>
  29 #include <linux/tcp.h>
  30 #include <linux/types.h>
  31 #include <linux/wireless.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/uaccess.h>
  34 #include <net/arp.h>
  35 #include "rtllib.h"
  36
  37 u32 rt_global_debug_component = COMP_ERR;
  38 EXPORT_SYMBOL(rt_global_debug_component);
  39
  40 static inline int rtllib_networks_allocate(struct rtllib_device *ieee)
  41 {
  42         if (ieee->networks)
  43                 return 0;
  44
  45         ieee->networks = kcalloc(MAX_NETWORK_COUNT,
  46                                  sizeof(struct rtllib_network), GFP_KERNEL);
  47         if (!ieee->networks)
  48                 return -ENOMEM;
  49
  50         return 0;
  51 }
  52
  53 static inline void rtllib_networks_free(struct rtllib_device *ieee)
  54 {
  55         if (!ieee->networks)
  56                 return;
  57         kfree(ieee->networks);
  58         ieee->networks = NULL;
  59 }
  60
  61 static inline void rtllib_networks_initialize(struct rtllib_device *ieee)
  62 {
  63         int i;
  64
  65         INIT_LIST_HEAD(&ieee->network_free_list);
  66         INIT_LIST_HEAD(&ieee->network_list);
  67         for (i = 0; i < MAX_NETWORK_COUNT; i++)
  68                 list_add_tail(&ieee->networks[i].list,
  69                               &ieee->network_free_list);
  70 }
  71
  72 struct net_device *alloc_rtllib(int sizeof_priv)
  73 {
  74         struct rtllib_device *ieee = NULL;
  75         struct net_device *dev;
  76         int i, err;
  77
  78         pr_debug("rtllib: Initializing...\n");
  79
  80         dev = alloc_etherdev(sizeof(struct rtllib_device) + sizeof_priv);
  81         if (!dev) {
  82                 pr_err("Unable to allocate net_device.\n");
  83                 return NULL;
  84         }
  85         ieee = (struct rtllib_device *)netdev_priv_rsl(dev);
  86         ieee->dev = dev;
  87
  88         err = rtllib_networks_allocate(ieee);
  89         if (err) {
  90                 pr_err("Unable to allocate beacon storage: %d\n", err);
  91                 goto failed;
  92         }
  93         rtllib_networks_initialize(ieee);
  94
  95         /* Default fragmentation threshold is maximum payload size */
  96         ieee->fts = DEFAULT_FTS;
  97         ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
  98         ieee->open_wep = 1;
  99
 100         /* Default to enabling full open WEP with host based encrypt/decrypt */
 101         ieee->host_encrypt = 1;
 102         ieee->host_decrypt = 1;
 103         ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
 104
 105         ieee->rtllib_ap_sec_type = rtllib_ap_sec_type;
 106
 107         spin_lock_init(&ieee->lock);
 108         spin_lock_init(&ieee->wpax_suitlist_lock);
 109         spin_lock_init(&ieee->reorder_spinlock);
 110         atomic_set(&(ieee->atm_swbw), 0);
 111
 112         /* SAM FIXME */
 113         lib80211_crypt_info_init(&ieee->crypt_info, "RTLLIB", &ieee->lock);
 114
 115         ieee->wpa_enabled = 0;
 116         ieee->tkip_countermeasures = 0;
 117         ieee->drop_unencrypted = 0;
 118         ieee->privacy_invoked = 0;
 119         ieee->ieee802_1x = 1;
 120         ieee->raw_tx = 0;
 121         ieee->hwsec_active = 0;
 122
 123         memset(ieee->swcamtable, 0, sizeof(struct sw_cam_table) * 32);
 124         rtllib_softmac_init(ieee);
 125
 126         ieee->pHTInfo = kzalloc(sizeof(struct rt_hi_throughput), GFP_KERNEL);
 127         if (!ieee->pHTInfo)
 128                 return NULL;
 129
 130         HTUpdateDefaultSetting(ieee);
 131         HTInitializeHTInfo(ieee);
 132         TSInitialize(ieee);
 133         for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
 134                 INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
 135
 136         for (i = 0; i < 17; i++) {
 137                 ieee->last_rxseq_num[i] = -1;
 138                 ieee->last_rxfrag_num[i] = -1;
 139                 ieee->last_packet_time[i] = 0;
 140         }
 141
 142         return dev;
 143
 144  failed:
 145         free_netdev(dev);
 146         return NULL;
 147 }
 148 EXPORT_SYMBOL(alloc_rtllib);
 149
 150 void free_rtllib(struct net_device *dev)
 151 {
 152         struct rtllib_device *ieee = (struct rtllib_device *)
 153                                       netdev_priv_rsl(dev);
 154
 155         kfree(ieee->pHTInfo);
 156         ieee->pHTInfo = NULL;
 157         rtllib_softmac_free(ieee);
 158
 159         lib80211_crypt_info_free(&ieee->crypt_info);
 160
 161         rtllib_networks_free(ieee);
 162         free_netdev(dev);
 163 }
 164 EXPORT_SYMBOL(free_rtllib);
 165
 166 static int __init rtllib_init(void)
 167 {
 168         return 0;
 169 }
 170
 171 static void __exit rtllib_exit(void)
 172 {
 173 }
 174
 175 module_init(rtllib_init);
 176 module_exit(rtllib_exit);
 177
 178 MODULE_LICENSE("GPL");