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
rtllib_networks_allocate(struct rtllib_device * ieee)37 static inline int rtllib_networks_allocate(struct rtllib_device *ieee)
38 {
39 if (ieee->networks)
40 return 0;
41
42 ieee->networks = kcalloc(MAX_NETWORK_COUNT,
43 sizeof(struct rtllib_network), GFP_KERNEL);
44 if (!ieee->networks)
45 return -ENOMEM;
46
47 return 0;
48 }
49
rtllib_networks_free(struct rtllib_device * ieee)50 static inline void rtllib_networks_free(struct rtllib_device *ieee)
51 {
52 if (!ieee->networks)
53 return;
54 kfree(ieee->networks);
55 ieee->networks = NULL;
56 }
57
rtllib_networks_initialize(struct rtllib_device * ieee)58 static inline void rtllib_networks_initialize(struct rtllib_device *ieee)
59 {
60 int i;
61
62 INIT_LIST_HEAD(&ieee->network_free_list);
63 INIT_LIST_HEAD(&ieee->network_list);
64 for (i = 0; i < MAX_NETWORK_COUNT; i++)
65 list_add_tail(&ieee->networks[i].list,
66 &ieee->network_free_list);
67 }
68
alloc_rtllib(int sizeof_priv)69 struct net_device *alloc_rtllib(int sizeof_priv)
70 {
71 struct rtllib_device *ieee = NULL;
72 struct net_device *dev;
73 int i, err;
74
75 pr_debug("rtllib: Initializing...\n");
76
77 dev = alloc_etherdev(sizeof(struct rtllib_device) + sizeof_priv);
78 if (!dev) {
79 pr_err("Unable to allocate net_device.\n");
80 return NULL;
81 }
82 ieee = (struct rtllib_device *)netdev_priv_rsl(dev);
83 ieee->dev = dev;
84
85 err = rtllib_networks_allocate(ieee);
86 if (err) {
87 pr_err("Unable to allocate beacon storage: %d\n", err);
88 goto free_netdev;
89 }
90 rtllib_networks_initialize(ieee);
91
92 /* Default fragmentation threshold is maximum payload size */
93 ieee->fts = DEFAULT_FTS;
94 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
95 ieee->open_wep = 1;
96
97 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
98
99 ieee->rtllib_ap_sec_type = rtllib_ap_sec_type;
100
101 spin_lock_init(&ieee->lock);
102 spin_lock_init(&ieee->wpax_suitlist_lock);
103 spin_lock_init(&ieee->reorder_spinlock);
104 atomic_set(&ieee->atm_swbw, 0);
105
106 /* SAM FIXME */
107 lib80211_crypt_info_init(&ieee->crypt_info, "RTLLIB", &ieee->lock);
108
109 ieee->wpa_enabled = 0;
110 ieee->tkip_countermeasures = 0;
111 ieee->drop_unencrypted = 0;
112 ieee->privacy_invoked = 0;
113 ieee->ieee802_1x = 1;
114 ieee->hwsec_active = 0;
115
116 memset(ieee->swcamtable, 0, sizeof(struct sw_cam_table) * 32);
117 err = rtllib_softmac_init(ieee);
118 if (err)
119 goto free_crypt_info;
120
121 ieee->ht_info = kzalloc(sizeof(struct rt_hi_throughput), GFP_KERNEL);
122 if (!ieee->ht_info)
123 goto free_softmac;
124
125 ht_update_default_setting(ieee);
126 ht_initialize_ht_info(ieee);
127 rtllib_ts_init(ieee);
128 for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
129 INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
130
131 for (i = 0; i < 17; i++) {
132 ieee->last_rxseq_num[i] = -1;
133 ieee->last_rxfrag_num[i] = -1;
134 ieee->last_packet_time[i] = 0;
135 }
136
137 return dev;
138
139 free_softmac:
140 rtllib_softmac_free(ieee);
141 free_crypt_info:
142 lib80211_crypt_info_free(&ieee->crypt_info);
143 rtllib_networks_free(ieee);
144 free_netdev:
145 free_netdev(dev);
146
147 return NULL;
148 }
149 EXPORT_SYMBOL(alloc_rtllib);
150
free_rtllib(struct net_device * dev)151 void free_rtllib(struct net_device *dev)
152 {
153 struct rtllib_device *ieee = (struct rtllib_device *)
154 netdev_priv_rsl(dev);
155
156 kfree(ieee->ht_info);
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
rtllib_init(void)166 static int __init rtllib_init(void)
167 {
168 return 0;
169 }
170
rtllib_exit(void)171 static void __exit rtllib_exit(void)
172 {
173 }
174
175 module_init(rtllib_init);
176 module_exit(rtllib_exit);
177
178 MODULE_DESCRIPTION("Support module for rtllib wireless devices");
179 MODULE_LICENSE("GPL");
180