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 
rtllib_networks_allocate(struct rtllib_device * ieee)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 
rtllib_networks_free(struct rtllib_device * ieee)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 
rtllib_networks_initialize(struct rtllib_device * ieee)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 
alloc_rtllib(int sizeof_priv)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 free_netdev;
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 	ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
101 
102 	ieee->rtllib_ap_sec_type = rtllib_ap_sec_type;
103 
104 	spin_lock_init(&ieee->lock);
105 	spin_lock_init(&ieee->wpax_suitlist_lock);
106 	spin_lock_init(&ieee->reorder_spinlock);
107 	atomic_set(&ieee->atm_swbw, 0);
108 
109 	/* SAM FIXME */
110 	lib80211_crypt_info_init(&ieee->crypt_info, "RTLLIB", &ieee->lock);
111 
112 	ieee->wpa_enabled = 0;
113 	ieee->tkip_countermeasures = 0;
114 	ieee->drop_unencrypted = 0;
115 	ieee->privacy_invoked = 0;
116 	ieee->ieee802_1x = 1;
117 	ieee->raw_tx = 0;
118 	ieee->hwsec_active = 0;
119 
120 	memset(ieee->swcamtable, 0, sizeof(struct sw_cam_table) * 32);
121 	err = rtllib_softmac_init(ieee);
122 	if (err)
123 		goto free_crypt_info;
124 
125 	ieee->ht_info = kzalloc(sizeof(struct rt_hi_throughput), GFP_KERNEL);
126 	if (!ieee->ht_info)
127 		goto free_softmac;
128 
129 	HTUpdateDefaultSetting(ieee);
130 	HTInitializeHTInfo(ieee);
131 	TSInitialize(ieee);
132 	for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
133 		INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
134 
135 	for (i = 0; i < 17; i++) {
136 		ieee->last_rxseq_num[i] = -1;
137 		ieee->last_rxfrag_num[i] = -1;
138 		ieee->last_packet_time[i] = 0;
139 	}
140 
141 	return dev;
142 
143 free_softmac:
144 	rtllib_softmac_free(ieee);
145 free_crypt_info:
146 	lib80211_crypt_info_free(&ieee->crypt_info);
147 	rtllib_networks_free(ieee);
148 free_netdev:
149 	free_netdev(dev);
150 
151 	return NULL;
152 }
153 EXPORT_SYMBOL(alloc_rtllib);
154 
free_rtllib(struct net_device * dev)155 void free_rtllib(struct net_device *dev)
156 {
157 	struct rtllib_device *ieee = (struct rtllib_device *)
158 				      netdev_priv_rsl(dev);
159 
160 	kfree(ieee->ht_info);
161 	rtllib_softmac_free(ieee);
162 
163 	lib80211_crypt_info_free(&ieee->crypt_info);
164 
165 	rtllib_networks_free(ieee);
166 	free_netdev(dev);
167 }
168 EXPORT_SYMBOL(free_rtllib);
169 
rtllib_init(void)170 static int __init rtllib_init(void)
171 {
172 	return 0;
173 }
174 
rtllib_exit(void)175 static void __exit rtllib_exit(void)
176 {
177 }
178 
179 module_init(rtllib_init);
180 module_exit(rtllib_exit);
181 
182 MODULE_LICENSE("GPL");
183