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hostap_ap.h
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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) */
44 
45  u8 addr[6];
46  u16 aid; /* STA's unique AID (1 .. 2007) or 0 if not yet assigned */
49  u16 listen_interval; /* or beacon_int for APs */
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  */
76 
77  struct lib80211_crypt_data *crypt;
78 
79  int ap; /* whether this station is an AP */
80 
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;
99 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
100 };
101 
102 
103 #define MAX_STA_COUNT 1024
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. Similarly, 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)
124 /* ap_policy: whether to accept frames to/from other APs/IBSS */
125 typedef enum {
128  AP_OTHER_AP_ALL = 2,
131 
132 #define PRISM2_AUTH_OPEN BIT(0)
133 #define PRISM2_AUTH_SHARED_KEY BIT(1)
136 /* MAC address-based restrictions */
137 struct mac_entry {
138  struct list_head list;
139  u8 addr[6];
140 };
144  unsigned int entries;
145  struct list_head mac_list;
147 };
150 struct add_sta_proc_data {
151  u8 addr[ETH_ALEN];
152  struct add_sta_proc_data *next;
153 };
156 typedef enum { WDS_ADD, WDS_DEL } wds_oper_type;
159  u8 addr[ETH_ALEN];
160  struct wds_oper_data *next;
161 };
164 struct ap_data {
165  int initialized; /* whether ap_data has been initialized */
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 */
180  int num_sta; /* number of entries in sta_list */
181  struct list_head sta_list; /* STA info list head */
187  unsigned int max_inactivity;
189 
190  struct mac_restrictions mac_restrictions; /* MAC-based auth */
192 
195 
198 
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  */
207 
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,
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);
225 typedef enum {
230  struct sk_buff *skb;
231  int host_encrypt;
232  struct lib80211_crypt_data *crypt;
233  void *sta_ptr;
234 };
239 typedef enum {
241 } ap_rx_ret;
243  struct sk_buff *skb,
245  int wds);
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,
254 void hostap_update_rates(local_info_t *local);
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 */