1 #ifndef HOSTAP_AP_H
2 #define HOSTAP_AP_H
3
4 #include "hostap_80211.h"
5
6 /* AP data structures for STAs */
7
8 /* maximum number of frames to buffer per STA */
9 #define STA_MAX_TX_BUFFER 32
10
11 /* STA flags */
12 #define WLAN_STA_AUTH BIT(0)
13 #define WLAN_STA_ASSOC BIT(1)
14 #define WLAN_STA_PS BIT(2)
15 #define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */
16 #define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
17 #define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
18 * controlling whether STA is authorized to
19 * send and receive non-IEEE 802.1X frames
20 */
21 #define WLAN_STA_PENDING_POLL BIT(6) /* pending activity poll not ACKed */
22
23 #define WLAN_RATE_1M BIT(0)
24 #define WLAN_RATE_2M BIT(1)
25 #define WLAN_RATE_5M5 BIT(2)
26 #define WLAN_RATE_11M BIT(3)
27 #define WLAN_RATE_COUNT 4
28
29 /* Maximum size of Supported Rates info element. IEEE 802.11 has a limit of 8,
30 * but some pre-standard IEEE 802.11g products use longer elements. */
31 #define WLAN_SUPP_RATES_MAX 32
32
33 /* Try to increase TX rate after # successfully sent consecutive packets */
34 #define WLAN_RATE_UPDATE_COUNT 50
35
36 /* Decrease TX rate after # consecutive dropped packets */
37 #define WLAN_RATE_DECREASE_THRESHOLD 2
38
39 struct sta_info {
40 struct list_head list;
41 struct sta_info *hnext; /* next entry in hash table list */
42 atomic_t users; /* number of users (do not remove if > 0) */
43 struct proc_dir_entry *proc;
44
45 u8 addr[6];
46 u16 aid; /* STA's unique AID (1 .. 2007) or 0 if not yet assigned */
47 u32 flags;
48 u16 capability;
49 u16 listen_interval; /* or beacon_int for APs */
50 u8 supported_rates[WLAN_SUPP_RATES_MAX];
51
52 unsigned long last_auth;
53 unsigned long last_assoc;
54 unsigned long last_rx;
55 unsigned long last_tx;
56 unsigned long rx_packets, tx_packets;
57 unsigned long rx_bytes, tx_bytes;
58 struct sk_buff_head tx_buf;
59 /* FIX: timeout buffers with an expiry time somehow derived from
60 * listen_interval */
61
62 s8 last_rx_silence; /* Noise in dBm */
63 s8 last_rx_signal; /* Signal strength in dBm */
64 u8 last_rx_rate; /* TX rate in 0.1 Mbps */
65 u8 last_rx_updated; /* IWSPY's struct iw_quality::updated */
66
67 u8 tx_supp_rates; /* bit field of supported TX rates */
68 u8 tx_rate; /* current TX rate (in 0.1 Mbps) */
69 u8 tx_rate_idx; /* current TX rate (WLAN_RATE_*) */
70 u8 tx_max_rate; /* max TX rate (WLAN_RATE_*) */
71 u32 tx_count[WLAN_RATE_COUNT]; /* number of frames sent (per rate) */
72 u32 rx_count[WLAN_RATE_COUNT]; /* number of frames received (per rate)
73 */
74 u32 tx_since_last_failure;
75 u32 tx_consecutive_exc;
76
77 struct lib80211_crypt_data *crypt;
78
79 int ap; /* whether this station is an AP */
80
81 local_info_t *local;
82
83 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
84 union {
85 struct {
86 char *challenge; /* shared key authentication
87 * challenge */
88 } sta;
89 struct {
90 int ssid_len;
91 unsigned char ssid[MAX_SSID_LEN + 1]; /* AP's ssid */
92 int channel;
93 unsigned long last_beacon; /* last RX beacon time */
94 } ap;
95 } u;
96
97 struct timer_list timer;
98 enum { STA_NULLFUNC = 0, STA_DISASSOC, STA_DEAUTH } timeout_next;
99 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
100 };
101
102
103 #define MAX_STA_COUNT 1024
104
105 /* Maximum number of AIDs to use for STAs; must be 2007 or lower
106 * (8802.11 limitation) */
107 #define MAX_AID_TABLE_SIZE 128
108
109 #define STA_HASH_SIZE 256
110 #define STA_HASH(sta) (sta[5])
111
112
113 /* Default value for maximum station inactivity. After AP_MAX_INACTIVITY_SEC
114 * has passed since last received frame from the station, a nullfunc data
115 * frame is sent to the station. If this frame is not acknowledged and no other
116 * frames have been received, the station will be disassociated after
117 * AP_DISASSOC_DELAY. Similarily, a the station will be deauthenticated after
118 * AP_DEAUTH_DELAY. AP_TIMEOUT_RESOLUTION is the resolution that is used with
119 * max inactivity timer. */
120 #define AP_MAX_INACTIVITY_SEC (5 * 60)
121 #define AP_DISASSOC_DELAY (HZ)
122 #define AP_DEAUTH_DELAY (HZ)
123
124 /* ap_policy: whether to accept frames to/from other APs/IBSS */
125 typedef enum {
126 AP_OTHER_AP_SKIP_ALL = 0,
127 AP_OTHER_AP_SAME_SSID = 1,
128 AP_OTHER_AP_ALL = 2,
129 AP_OTHER_AP_EVEN_IBSS = 3
130 } ap_policy_enum;
131
132 #define PRISM2_AUTH_OPEN BIT(0)
133 #define PRISM2_AUTH_SHARED_KEY BIT(1)
134
135
136 /* MAC address-based restrictions */
137 struct mac_entry {
138 struct list_head list;
139 u8 addr[6];
140 };
141
142 struct mac_restrictions {
143 enum { MAC_POLICY_OPEN = 0, MAC_POLICY_ALLOW, MAC_POLICY_DENY } policy;
144 unsigned int entries;
145 struct list_head mac_list;
146 spinlock_t lock;
147 };
148
149
150 struct add_sta_proc_data {
151 u8 addr[ETH_ALEN];
152 struct add_sta_proc_data *next;
153 };
154
155
156 typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
157 struct wds_oper_data {
158 wds_oper_type type;
159 u8 addr[ETH_ALEN];
160 struct wds_oper_data *next;
161 };
162
163
164 struct ap_data {
165 int initialized; /* whether ap_data has been initialized */
166 local_info_t *local;
167 int bridge_packets; /* send packet to associated STAs directly to the
168 * wireless media instead of higher layers in the
169 * kernel */
170 unsigned int bridged_unicast; /* number of unicast frames bridged on
171 * wireless media */
172 unsigned int bridged_multicast; /* number of non-unicast frames
173 * bridged on wireless media */
174 unsigned int tx_drop_nonassoc; /* number of unicast TX packets dropped
175 * because they were to an address that
176 * was not associated */
177 int nullfunc_ack; /* use workaround for nullfunc frame ACKs */
178
179 spinlock_t sta_table_lock;
180 int num_sta; /* number of entries in sta_list */
181 struct list_head sta_list; /* STA info list head */
182 struct sta_info *sta_hash[STA_HASH_SIZE];
183
184 struct proc_dir_entry *proc;
185
186 ap_policy_enum ap_policy;
187 unsigned int max_inactivity;
188 int autom_ap_wds;
189
190 struct mac_restrictions mac_restrictions; /* MAC-based auth */
191 int last_tx_rate;
192
193 struct work_struct add_sta_proc_queue;
194 struct add_sta_proc_data *add_sta_proc_entries;
195
196 struct work_struct wds_oper_queue;
197 struct wds_oper_data *wds_oper_entries;
198
199 u16 tx_callback_idx;
200
201 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
202 /* pointers to STA info; based on allocated AID or NULL if AID free
203 * AID is in the range 1-2007, so sta_aid[0] corresponders to AID 1
204 * and so on
205 */
206 struct sta_info *sta_aid[MAX_AID_TABLE_SIZE];
207
208 u16 tx_callback_auth, tx_callback_assoc, tx_callback_poll;
209
210 /* WEP operations for generating challenges to be used with shared key
211 * authentication */
212 struct lib80211_crypto_ops *crypt;
213 void *crypt_priv;
214 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
215 };
216
217
218 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
219 struct hostap_80211_rx_status *rx_stats);
220 void hostap_init_data(local_info_t *local);
221 void hostap_init_ap_proc(local_info_t *local);
222 void hostap_free_data(struct ap_data *ap);
223 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver);
224
225 typedef enum {
226 AP_TX_CONTINUE, AP_TX_DROP, AP_TX_RETRY, AP_TX_BUFFERED,
227 AP_TX_CONTINUE_NOT_AUTHORIZED
228 } ap_tx_ret;
229 struct hostap_tx_data {
230 struct sk_buff *skb;
231 int host_encrypt;
232 struct lib80211_crypt_data *crypt;
233 void *sta_ptr;
234 };
235 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx);
236 void hostap_handle_sta_release(void *ptr);
237 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb);
238 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr);
239 typedef enum {
240 AP_RX_CONTINUE, AP_RX_DROP, AP_RX_EXIT, AP_RX_CONTINUE_NOT_AUTHORIZED
241 } ap_rx_ret;
242 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
243 struct sk_buff *skb,
244 struct hostap_80211_rx_status *rx_stats,
245 int wds);
246 int hostap_handle_sta_crypto(local_info_t *local, struct ieee80211_hdr *hdr,
247 struct lib80211_crypt_data **crypt,
248 void **sta_ptr);
249 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr);
250 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr);
251 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr);
252 int hostap_update_rx_stats(struct ap_data *ap, struct ieee80211_hdr *hdr,
253 struct hostap_80211_rx_status *rx_stats);
254 void hostap_update_rates(local_info_t *local);
255 void hostap_add_wds_links(local_info_t *local);
256 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type);
257
258 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
259 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
260 int resend);
261 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
262
263 #endif /* HOSTAP_AP_H */
264
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