net/ieee80211/softmac/ieee80211softmac_priv.h

   1 /*
   2  * Internal softmac API definitions.
   3  *
   4  * Copyright (c) 2005, 2006 Johannes Berg <johannes@sipsolutions.net>
   5  *                          Joseph Jezak <josejx@gentoo.org>
   6  *                          Larry Finger <Larry.Finger@lwfinger.net>
   7  *                          Danny van Dyk <kugelfang@gentoo.org>
   8  *                          Michael Buesch <mbuesch@freenet.de>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  17  * more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  22  *
  23  * The full GNU General Public License is included in this distribution in the
  24  * file called COPYING.
  25  */
  26
  27 #ifndef IEEE80211SOFTMAC_PRIV_H_
  28 #define IEEE80211SOFTMAC_PRIV_H_
  29
  30 #include <net/ieee80211softmac.h>
  31 #include <net/ieee80211softmac_wx.h>
  32 #include <linux/kernel.h>
  33 #include <linux/stringify.h>
  34
  35
  36 #define PFX                             "SoftMAC: "
  37
  38 #ifdef assert
  39 # undef assert
  40 #endif
  41 #ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG
  42 #define assert(expr) \
  43         do {                                                                            \
  44                 if (unlikely(!(expr))) {                                                \
  45                 printkl(KERN_ERR PFX "ASSERTION FAILED (%s) at: %s:%d:%s()\n", #expr,   \
  46                         __FILE__, __LINE__, __func__);                          \
  47                 }                                                                       \
  48         } while (0)
  49 #else
  50 #define assert(expr) do {} while (0)
  51 #endif
  52
  53 /* rate limited printk(). */
  54 #ifdef printkl
  55 # undef printkl
  56 #endif
  57 #define printkl(f, x...)  do { if (printk_ratelimit()) printk(f ,##x); } while (0)
  58 /* rate limited printk() for debugging */
  59 #ifdef dprintkl
  60 # undef dprintkl
  61 #endif
  62 #ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG
  63 # define dprintkl               printkl
  64 #else
  65 # define dprintkl(f, x...)      do { /* nothing */ } while (0)
  66 #endif
  67
  68 /* debugging printk() */
  69 #ifdef dprintk
  70 # undef dprintk
  71 #endif
  72 #ifdef CONFIG_IEEE80211_SOFTMAC_DEBUG
  73 # define dprintk(f, x...)  do { printk(f ,##x); } while (0)
  74 #else
  75 # define dprintk(f, x...)  do { /* nothing */ } while (0)
  76 #endif
  77
  78 /* private definitions and prototypes */
  79
  80 /*** prototypes from _scan.c */
  81 void ieee80211softmac_scan(struct work_struct *work);
  82 /* for internal use if scanning is needed */
  83 int ieee80211softmac_start_scan(struct ieee80211softmac_device *mac);
  84 void ieee80211softmac_stop_scan(struct ieee80211softmac_device *mac);
  85 void ieee80211softmac_wait_for_scan(struct ieee80211softmac_device *mac);
  86
  87 /* for use by _module.c to assign to the callbacks */
  88 int ieee80211softmac_start_scan_implementation(struct net_device *dev);
  89 void ieee80211softmac_stop_scan_implementation(struct net_device *dev);
  90 void ieee80211softmac_wait_for_scan_implementation(struct net_device *dev);
  91
  92 /*** Network prototypes from _module.c */
  93 struct ieee80211softmac_network * ieee80211softmac_create_network(
  94         struct ieee80211softmac_device *mac, struct ieee80211_network *net);
  95 void ieee80211softmac_add_network_locked(struct ieee80211softmac_device *mac,
  96         struct ieee80211softmac_network *net);
  97 void ieee80211softmac_add_network(struct ieee80211softmac_device *mac,
  98         struct ieee80211softmac_network *net);
  99 void ieee80211softmac_del_network_locked(struct ieee80211softmac_device *mac,
 100         struct ieee80211softmac_network *net);
 101 void ieee80211softmac_del_network(struct ieee80211softmac_device *mac,
 102         struct ieee80211softmac_network *net);
 103 struct ieee80211softmac_network * ieee80211softmac_get_network_by_bssid_locked(
 104         struct ieee80211softmac_device *mac, u8 *ea);
 105 struct ieee80211softmac_network * ieee80211softmac_get_network_by_bssid(
 106         struct ieee80211softmac_device *mac, u8 *ea);
 107 struct ieee80211softmac_network * ieee80211softmac_get_network_by_ssid_locked(
 108         struct ieee80211softmac_device *mac, u8 *ssid, u8 ssid_len);
 109 struct ieee80211softmac_network * ieee80211softmac_get_network_by_ssid(
 110         struct ieee80211softmac_device *mac, u8 *ssid, u8 ssid_len);
 111 struct ieee80211softmac_network *
 112 ieee80211softmac_get_network_by_essid_locked(struct ieee80211softmac_device *mac,
 113         struct ieee80211softmac_essid *essid);
 114 struct ieee80211softmac_network *
 115 ieee80211softmac_get_network_by_essid(struct ieee80211softmac_device *mac,
 116         struct ieee80211softmac_essid *essid);
 117
 118 /* Rates related */
 119 void ieee80211softmac_process_erp(struct ieee80211softmac_device *mac,
 120         u8 erp_value);
 121 int ieee80211softmac_ratesinfo_rate_supported(struct ieee80211softmac_ratesinfo *ri, u8 rate);
 122 u8 ieee80211softmac_lower_rate_delta(struct ieee80211softmac_device *mac, u8 rate, int delta);
 123 void ieee80211softmac_init_bss(struct ieee80211softmac_device *mac);
 124 void ieee80211softmac_recalc_txrates(struct ieee80211softmac_device *mac);
 125 static inline u8 lower_rate(struct ieee80211softmac_device *mac, u8 rate) {
 126         return ieee80211softmac_lower_rate_delta(mac, rate, 1);
 127 }
 128
 129 static inline u8 get_fallback_rate(struct ieee80211softmac_device *mac, u8 rate)
 130 {
 131         return ieee80211softmac_lower_rate_delta(mac, rate, 2);
 132 }
 133
 134
 135 /*** prototypes from _io.c */
 136 int ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac,
 137         void* ptrarg, u32 type, u32 arg);
 138 int ieee80211softmac_handle_beacon(struct net_device *dev,
 139         struct ieee80211_beacon *beacon,
 140         struct ieee80211_network *network);
 141
 142 /*** prototypes from _auth.c */
 143 /* do these have to go into the public header? */
 144 int ieee80211softmac_auth_req(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net);
 145 int ieee80211softmac_deauth_req(struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, int reason);
 146
 147 /* for use by _module.c to assign to the callbacks */
 148 int ieee80211softmac_auth_resp(struct net_device *dev, struct ieee80211_auth *auth);
 149 int ieee80211softmac_deauth_resp(struct net_device *dev, struct ieee80211_deauth *deauth);
 150
 151 /*** prototypes from _assoc.c */
 152 void ieee80211softmac_assoc_work(struct work_struct *work);
 153 int ieee80211softmac_handle_assoc_response(struct net_device * dev,
 154                                            struct ieee80211_assoc_response * resp,
 155                                            struct ieee80211_network * network);
 156 int ieee80211softmac_handle_disassoc(struct net_device * dev,
 157                                      struct ieee80211_disassoc * disassoc);
 158 int ieee80211softmac_handle_reassoc_req(struct net_device * dev,
 159                                         struct ieee80211_reassoc_request * reassoc);
 160 void ieee80211softmac_assoc_timeout(struct work_struct *work);
 161 void ieee80211softmac_send_disassoc_req(struct ieee80211softmac_device *mac, u16 reason);
 162 void ieee80211softmac_disassoc(struct ieee80211softmac_device *mac);
 163
 164 /* some helper functions */
 165 static inline int ieee80211softmac_scan_handlers_check_self(struct ieee80211softmac_device *sm)
 166 {
 167         return (sm->start_scan == ieee80211softmac_start_scan_implementation) &&
 168                 (sm->stop_scan == ieee80211softmac_stop_scan_implementation) &&
 169                 (sm->wait_for_scan == ieee80211softmac_wait_for_scan_implementation);
 170 }
 171
 172 static inline int ieee80211softmac_scan_sanity_check(struct ieee80211softmac_device *sm)
 173 {
 174         return ((sm->start_scan != ieee80211softmac_start_scan_implementation) &&
 175                 (sm->stop_scan != ieee80211softmac_stop_scan_implementation) &&
 176                 (sm->wait_for_scan != ieee80211softmac_wait_for_scan_implementation)
 177                 ) || ieee80211softmac_scan_handlers_check_self(sm);
 178 }
 179
 180 #define IEEE80211SOFTMAC_PROBE_DELAY            HZ/50
 181 #define IEEE80211SOFTMAC_WORKQUEUE_NAME_LEN     (17 + IFNAMSIZ)
 182
 183 struct ieee80211softmac_network {
 184         struct list_head                list;   /* List */
 185         /* Network information copied from ieee80211_network */
 186         u8 bssid[ETH_ALEN];
 187         u8 channel;
 188         struct ieee80211softmac_essid essid;
 189
 190         struct ieee80211softmac_ratesinfo supported_rates;
 191
 192         /* SoftMAC specific */
 193         u16 authenticating:1,                   /* Status Flags */
 194             authenticated:1,
 195             auth_desynced_once:1;
 196
 197         u8 erp_value;                           /* Saved ERP value */
 198         u16 capabilities;                       /* Capabilities bitfield */
 199         u8 challenge_len;                       /* Auth Challenge length */
 200         char *challenge;                        /* Challenge Text */
 201 };
 202
 203 /* structure used to keep track of networks we're auth'ing to */
 204 struct ieee80211softmac_auth_queue_item {
 205         struct list_head                list;   /* List head */
 206         struct ieee80211softmac_network *net;   /* Network to auth */
 207         struct ieee80211softmac_device  *mac;   /* SoftMAC device */
 208         u8 retry;                               /* Retry limit */
 209         u8 state;                               /* Auth State */
 210         struct delayed_work             work;   /* Work queue */
 211 };
 212
 213 /* scanning information */
 214 struct ieee80211softmac_scaninfo {
 215         u8 current_channel_idx,
 216            number_channels;
 217         struct ieee80211_channel *channels;
 218         u8 started:1,
 219            stop:1;
 220         u8 skip_flags;
 221         struct completion finished;
 222         struct delayed_work softmac_scan;
 223         struct ieee80211softmac_device *mac;
 224 };
 225
 226 /* private event struct */
 227 struct ieee80211softmac_event {
 228         struct list_head list;
 229         int event_type;
 230         void *event_context;
 231         struct delayed_work work;
 232         notify_function_ptr fun;
 233         void *context;
 234         struct ieee80211softmac_device *mac;
 235 };
 236
 237 void ieee80211softmac_call_events(struct ieee80211softmac_device *mac, int event, void *event_context);
 238 void ieee80211softmac_call_events_locked(struct ieee80211softmac_device *mac, int event, void *event_context);
 239 int ieee80211softmac_notify_internal(struct ieee80211softmac_device *mac,
 240         int event, void *event_context, notify_function_ptr fun, void *context, gfp_t gfp_mask);
 241
 242 void ieee80211softmac_try_reassoc(struct ieee80211softmac_device *mac);
 243
 244 #endif /* IEEE80211SOFTMAC_PRIV_H_ */