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
37static 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
50static 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
58static 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
69struct 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
139free_softmac:
140	rtllib_softmac_free(ieee);
141free_crypt_info:
142	lib80211_crypt_info_free(&ieee->crypt_info);
143	rtllib_networks_free(ieee);
144free_netdev:
145	free_netdev(dev);
146
147	return NULL;
148}
149EXPORT_SYMBOL(alloc_rtllib);
150
151void 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}
164EXPORT_SYMBOL(free_rtllib);
165
166static int __init rtllib_init(void)
167{
168	return 0;
169}
170
171static void __exit rtllib_exit(void)
172{
173}
174
175module_init(rtllib_init);
176module_exit(rtllib_exit);
177
178MODULE_LICENSE("GPL");
179