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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_freebsd.h

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    1 /*-
    2  * Copyright (c) 2003-2007 Sam Leffler, Errno Consulting
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  *
   25  * $FreeBSD$
   26  */
   27 #ifndef _NET80211_IEEE80211_FREEBSD_H_
   28 #define _NET80211_IEEE80211_FREEBSD_H_
   29 
   30 #ifdef _KERNEL
   31 /*
   32  * Common state locking definitions.
   33  */
   34 typedef struct mtx ieee80211_com_lock_t;
   35 #define IEEE80211_LOCK_INIT(_ic, _name) \
   36         mtx_init(&(_ic)->ic_comlock, _name, "802.11 com lock", MTX_DEF)
   37 #define IEEE80211_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_comlock)
   38 #define IEEE80211_LOCK(_ic)        mtx_lock(&(_ic)->ic_comlock)
   39 #define IEEE80211_UNLOCK(_ic)      mtx_unlock(&(_ic)->ic_comlock)
   40 #define IEEE80211_LOCK_ASSERT(_ic) \
   41         mtx_assert(&(_ic)->ic_comlock, MA_OWNED)
   42 
   43 /*
   44  * Beacon locking definitions.
   45  */
   46 typedef struct mtx ieee80211_beacon_lock_t;
   47 #define IEEE80211_BEACON_LOCK_INIT(_ic, _name) \
   48         mtx_init(&(_ic)->ic_beaconlock, _name, "802.11 beacon lock", MTX_DEF)
   49 #define IEEE80211_BEACON_LOCK_DESTROY(_ic) mtx_destroy(&(_ic)->ic_beaconlock)
   50 #define IEEE80211_BEACON_LOCK(_ic)         mtx_lock(&(_ic)->ic_beaconlock)
   51 #define IEEE80211_BEACON_UNLOCK(_ic)       mtx_unlock(&(_ic)->ic_beaconlock)
   52 #define IEEE80211_BEACON_LOCK_ASSERT(_ic) \
   53         mtx_assert(&(_ic)->ic_beaconlock, MA_OWNED)
   54 
   55 /*
   56  * Node locking definitions.
   57  * NB: MTX_DUPOK is because we don't generate per-interface strings.
   58  */
   59 typedef struct mtx ieee80211_node_lock_t;
   60 #define IEEE80211_NODE_LOCK_INIT(_nt, _name) \
   61         mtx_init(&(_nt)->nt_nodelock, _name, "802.11 node table", \
   62                 MTX_DEF | MTX_DUPOK)
   63 #define IEEE80211_NODE_LOCK_DESTROY(_nt)        mtx_destroy(&(_nt)->nt_nodelock)
   64 #define IEEE80211_NODE_LOCK(_nt)                mtx_lock(&(_nt)->nt_nodelock)
   65 #define IEEE80211_NODE_IS_LOCKED(_nt)           mtx_owned(&(_nt)->nt_nodelock)
   66 #define IEEE80211_NODE_UNLOCK(_nt)              mtx_unlock(&(_nt)->nt_nodelock)
   67 #define IEEE80211_NODE_LOCK_ASSERT(_nt) \
   68         mtx_assert(&(_nt)->nt_nodelock, MA_OWNED)
   69 
   70 /*
   71  * Node table scangen locking definitions.
   72  */
   73 typedef struct mtx ieee80211_scan_lock_t;
   74 #define IEEE80211_SCAN_LOCK_INIT(_nt, _name) \
   75         mtx_init(&(_nt)->nt_scanlock, _name, "802.11 node scangen", MTX_DEF)
   76 #define IEEE80211_SCAN_LOCK_DESTROY(_nt)        mtx_destroy(&(_nt)->nt_scanlock)
   77 #define IEEE80211_SCAN_LOCK(_nt)                mtx_lock(&(_nt)->nt_scanlock)
   78 #define IEEE80211_SCAN_UNLOCK(_nt)              mtx_unlock(&(_nt)->nt_scanlock)
   79 #define IEEE80211_SCAN_LOCK_ASSERT(_nt) \
   80         mtx_assert(&(_nt)->nt_scanlock, MA_OWNED)
   81 
   82 /*
   83  * Per-node power-save queue definitions. 
   84  */
   85 #define IEEE80211_NODE_SAVEQ_INIT(_ni, _name) do {              \
   86         mtx_init(&(_ni)->ni_savedq.ifq_mtx, _name, "802.11 ps queue", MTX_DEF);\
   87         (_ni)->ni_savedq.ifq_maxlen = IEEE80211_PS_MAX_QUEUE;   \
   88 } while (0)
   89 #define IEEE80211_NODE_SAVEQ_DESTROY(_ni) \
   90         mtx_destroy(&(_ni)->ni_savedq.ifq_mtx)
   91 #define IEEE80211_NODE_SAVEQ_QLEN(_ni) \
   92         _IF_QLEN(&(_ni)->ni_savedq)
   93 #define IEEE80211_NODE_SAVEQ_LOCK(_ni) do {     \
   94         IF_LOCK(&(_ni)->ni_savedq);                             \
   95 } while (0)
   96 #define IEEE80211_NODE_SAVEQ_UNLOCK(_ni) do {   \
   97         IF_UNLOCK(&(_ni)->ni_savedq);                           \
   98 } while (0)
   99 #define IEEE80211_NODE_SAVEQ_DEQUEUE(_ni, _m, _qlen) do {       \
  100         IEEE80211_NODE_SAVEQ_LOCK(_ni);                         \
  101         _IF_DEQUEUE(&(_ni)->ni_savedq, _m);                     \
  102         (_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni);               \
  103         IEEE80211_NODE_SAVEQ_UNLOCK(_ni);                       \
  104 } while (0)
  105 #define IEEE80211_NODE_SAVEQ_DRAIN(_ni, _qlen) do {             \
  106         IEEE80211_NODE_SAVEQ_LOCK(_ni);                         \
  107         (_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni);               \
  108         _IF_DRAIN(&(_ni)->ni_savedq);                           \
  109         IEEE80211_NODE_SAVEQ_UNLOCK(_ni);                       \
  110 } while (0)
  111 /* XXX could be optimized */
  112 #define _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(_ni, _m) do {        \
  113         _IF_DEQUEUE(&(_ni)->ni_savedq, m);                      \
  114 } while (0)
  115 #define _IEEE80211_NODE_SAVEQ_ENQUEUE(_ni, _m, _qlen, _age) do {\
  116         (_m)->m_nextpkt = NULL;                                 \
  117         if ((_ni)->ni_savedq.ifq_tail != NULL) {                \
  118                 _age -= M_AGE_GET((_ni)->ni_savedq.ifq_head);   \
  119                 (_ni)->ni_savedq.ifq_tail->m_nextpkt = (_m);    \
  120         } else {                                                \
  121                 (_ni)->ni_savedq.ifq_head = (_m);               \
  122         }                                                       \
  123         M_AGE_SET(_m, _age);                                    \
  124         (_ni)->ni_savedq.ifq_tail = (_m);                       \
  125         (_qlen) = ++(_ni)->ni_savedq.ifq_len;                   \
  126 } while (0)
  127 
  128 #define IEEE80211_TAPQ_INIT(_tap) do {                          \
  129         mtx_init(&(tap)->txa_q.ifq_mtx, "ampdu tx queue", NULL, MTX_DEF); \
  130         (_tap)->txa_q.ifq_maxlen = IEEE80211_AGGR_BAWMAX;       \
  131 } while (0)
  132 #define IEEE80211_TAPQ_DESTROY(_tap) \
  133         mtx_destroy(&(_tap)->txa_q.ifq_mtx)
  134 
  135 #ifndef IF_PREPEND_LIST
  136 #define _IF_PREPEND_LIST(ifq, mhead, mtail, mcount) do {        \
  137         (mtail)->m_nextpkt = (ifq)->ifq_head;                   \
  138         if ((ifq)->ifq_tail == NULL)                            \
  139                 (ifq)->ifq_tail = (mtail);                      \
  140         (ifq)->ifq_head = (mhead);                              \
  141         (ifq)->ifq_len += (mcount);                             \
  142 } while (0)
  143 #define IF_PREPEND_LIST(ifq, mhead, mtail, mcount) do {         \
  144         IF_LOCK(ifq);                                           \
  145         _IF_PREPEND_LIST(ifq, mhead, mtail, mcount);            \
  146         IF_UNLOCK(ifq);                                         \
  147 } while (0)
  148 #endif /* IF_PREPEND_LIST */
  149 
  150 /*
  151  * 802.1x MAC ACL database locking definitions.
  152  */
  153 typedef struct mtx acl_lock_t;
  154 #define ACL_LOCK_INIT(_as, _name) \
  155         mtx_init(&(_as)->as_lock, _name, "802.11 ACL", MTX_DEF)
  156 #define ACL_LOCK_DESTROY(_as)           mtx_destroy(&(_as)->as_lock)
  157 #define ACL_LOCK(_as)                   mtx_lock(&(_as)->as_lock)
  158 #define ACL_UNLOCK(_as)                 mtx_unlock(&(_as)->as_lock)
  159 #define ACL_LOCK_ASSERT(_as) \
  160         mtx_assert((&(_as)->as_lock), MA_OWNED)
  161 
  162 /*
  163  * Node reference counting definitions.
  164  *
  165  * ieee80211_node_initref       initialize the reference count to 1
  166  * ieee80211_node_incref        add a reference
  167  * ieee80211_node_decref        remove a reference
  168  * ieee80211_node_dectestref    remove a reference and return 1 if this
  169  *                              is the last reference, otherwise 0
  170  * ieee80211_node_refcnt        reference count for printing (only)
  171  */
  172 #include <machine/atomic.h>
  173 
  174 #define ieee80211_node_initref(_ni) \
  175         do { ((_ni)->ni_refcnt = 1); } while (0)
  176 #define ieee80211_node_incref(_ni) \
  177         atomic_add_int(&(_ni)->ni_refcnt, 1)
  178 #define ieee80211_node_decref(_ni) \
  179         atomic_subtract_int(&(_ni)->ni_refcnt, 1)
  180 struct ieee80211_node;
  181 int     ieee80211_node_dectestref(struct ieee80211_node *ni);
  182 #define ieee80211_node_refcnt(_ni)      (_ni)->ni_refcnt
  183 
  184 struct ifqueue;
  185 void    ieee80211_drain_ifq(struct ifqueue *);
  186 
  187 #define msecs_to_ticks(ms)      (((ms)*hz)/1000)
  188 #define ticks_to_msecs(t)       ((t) / hz)
  189 #define time_after(a,b)         ((long)(b) - (long)(a) < 0)
  190 #define time_before(a,b)        time_after(b,a)
  191 #define time_after_eq(a,b)      ((long)(a) - (long)(b) >= 0)
  192 #define time_before_eq(a,b)     time_after_eq(b,a)
  193 
  194 struct mbuf *ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen);
  195 
  196 /* tx path usage */
  197 #define M_LINK0         M_PROTO1                /* WEP requested */
  198 #define M_PWR_SAV       M_PROTO4                /* bypass PS handling */
  199 #define M_MORE_DATA     M_PROTO5                /* more data frames to follow */
  200 #define M_FF            M_PROTO6                /* fast frame */
  201 #define M_TXCB          M_PROTO7                /* do tx complete callback */
  202 #define M_80211_TX \
  203         (M_LINK0|M_WME_AC_MASK|M_PWR_SAV|M_MORE_DATA|M_FF|M_TXCB)
  204 
  205 /* rx path usage */
  206 #define M_AMPDU         M_PROTO1                /* A-MPDU processing done */
  207 #define M_WEP           M_PROTO2                /* WEP done by hardware */
  208 #define M_80211_RX      (M_AMPDU|M_WEP)
  209 /*
  210  * Encode WME access control bits in the PROTO flags.
  211  * This is safe since it's passed directly in to the
  212  * driver and there's no chance someone else will clobber
  213  * them on us.
  214  */
  215 #define M_WME_AC_MASK   (M_PROTO2|M_PROTO3)
  216 /* XXX 5 is wrong if M_PROTO* are redefined */
  217 #define M_WME_AC_SHIFT  5
  218 
  219 #define M_WME_SETAC(m, ac) \
  220         ((m)->m_flags = ((m)->m_flags &~ M_WME_AC_MASK) | \
  221                 ((ac) << M_WME_AC_SHIFT))
  222 #define M_WME_GETAC(m)  (((m)->m_flags >> M_WME_AC_SHIFT) & 0x3)
  223 
  224 /*
  225  * Mbufs on the power save queue are tagged with an age and
  226  * timed out.  We reuse the hardware checksum field in the
  227  * mbuf packet header to store this data.
  228  */
  229 #define M_AGE_SET(m,v)          (m->m_pkthdr.csum_data = v)
  230 #define M_AGE_GET(m)            (m->m_pkthdr.csum_data)
  231 #define M_AGE_SUB(m,adj)        (m->m_pkthdr.csum_data -= adj)
  232 
  233 #define MTAG_ABI_NET80211       1132948340      /* net80211 ABI */
  234 
  235 struct ieee80211_cb {
  236         void    (*func)(struct ieee80211_node *, void *, int status);
  237         void    *arg;
  238 };
  239 #define NET80211_TAG_CALLBACK   0       /* xmit complete callback */
  240 int     ieee80211_add_callback(struct mbuf *m,
  241                 void (*func)(struct ieee80211_node *, void *, int), void *arg);
  242 void    ieee80211_process_callback(struct ieee80211_node *, struct mbuf *, int);
  243 
  244 void    get_random_bytes(void *, size_t);
  245 
  246 struct ieee80211com;
  247 
  248 void    ieee80211_sysctl_attach(struct ieee80211com *);
  249 void    ieee80211_sysctl_detach(struct ieee80211com *);
  250 
  251 void    ieee80211_load_module(const char *);
  252 
  253 #define IEEE80211_CRYPTO_MODULE(name, version) \
  254 static int                                                              \
  255 name##_modevent(module_t mod, int type, void *unused)                   \
  256 {                                                                       \
  257         switch (type) {                                                 \
  258         case MOD_LOAD:                                                  \
  259                 ieee80211_crypto_register(&name);                       \
  260                 return 0;                                               \
  261         case MOD_UNLOAD:                                                \
  262         case MOD_QUIESCE:                                               \
  263                 if (nrefs) {                                            \
  264                         printf("wlan_##name: still in use (%u dynamic refs)\n",\
  265                                 nrefs);                                 \
  266                         return EBUSY;                                   \
  267                 }                                                       \
  268                 if (type == MOD_UNLOAD)                                 \
  269                         ieee80211_crypto_unregister(&name);             \
  270                 return 0;                                               \
  271         }                                                               \
  272         return EINVAL;                                                  \
  273 }                                                                       \
  274 static moduledata_t name##_mod = {                                      \
  275         "wlan_" #name,                                                  \
  276         name##_modevent,                                                \
  277         0                                                               \
  278 };                                                                      \
  279 DECLARE_MODULE(wlan_##name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);\
  280 MODULE_VERSION(wlan_##name, version);                                   \
  281 MODULE_DEPEND(wlan_##name, wlan, 1, 1, 1)
  282 #endif /* _KERNEL */
  283 
  284 /* XXX this stuff belongs elsewhere */
  285 /*
  286  * Message formats for messages from the net80211 layer to user
  287  * applications via the routing socket.  These messages are appended
  288  * to an if_announcemsghdr structure.
  289  */
  290 struct ieee80211_join_event {
  291         uint8_t         iev_addr[6];
  292 };
  293 
  294 struct ieee80211_leave_event {
  295         uint8_t         iev_addr[6];
  296 };
  297 
  298 struct ieee80211_replay_event {
  299         uint8_t         iev_src[6];     /* src MAC */
  300         uint8_t         iev_dst[6];     /* dst MAC */
  301         uint8_t         iev_cipher;     /* cipher type */
  302         uint8_t         iev_keyix;      /* key id/index */
  303         uint64_t        iev_keyrsc;     /* RSC from key */
  304         uint64_t        iev_rsc;        /* RSC from frame */
  305 };
  306 
  307 struct ieee80211_michael_event {
  308         uint8_t         iev_src[6];     /* src MAC */
  309         uint8_t         iev_dst[6];     /* dst MAC */
  310         uint8_t         iev_cipher;     /* cipher type */
  311         uint8_t         iev_keyix;      /* key id/index */
  312 };
  313 
  314 #define RTM_IEEE80211_ASSOC     100     /* station associate (bss mode) */
  315 #define RTM_IEEE80211_REASSOC   101     /* station re-associate (bss mode) */
  316 #define RTM_IEEE80211_DISASSOC  102     /* station disassociate (bss mode) */
  317 #define RTM_IEEE80211_JOIN      103     /* station join (ap mode) */
  318 #define RTM_IEEE80211_LEAVE     104     /* station leave (ap mode) */
  319 #define RTM_IEEE80211_SCAN      105     /* scan complete, results available */
  320 #define RTM_IEEE80211_REPLAY    106     /* sequence counter replay detected */
  321 #define RTM_IEEE80211_MICHAEL   107     /* Michael MIC failure detected */
  322 #define RTM_IEEE80211_REJOIN    108     /* station re-associate (ap mode) */
  323 
  324 /*
  325  * Structure prepended to raw packets sent through the bpf
  326  * interface when set to DLT_IEEE802_11_RADIO.  This allows
  327  * user applications to specify pretty much everything in
  328  * an Atheros tx descriptor.  XXX need to generalize.
  329  *
  330  * XXX cannot be more than 14 bytes as it is copied to a sockaddr's
  331  * XXX sa_data area.
  332  */
  333 struct ieee80211_bpf_params {
  334         uint8_t         ibp_vers;       /* version */
  335 #define IEEE80211_BPF_VERSION   0
  336         uint8_t         ibp_len;        /* header length in bytes */
  337         uint8_t         ibp_flags;
  338 #define IEEE80211_BPF_SHORTPRE  0x01    /* tx with short preamble */
  339 #define IEEE80211_BPF_NOACK     0x02    /* tx with no ack */
  340 #define IEEE80211_BPF_CRYPTO    0x04    /* tx with h/w encryption */
  341 #define IEEE80211_BPF_FCS       0x10    /* frame incldues FCS */
  342 #define IEEE80211_BPF_DATAPAD   0x20    /* frame includes data padding */
  343 #define IEEE80211_BPF_RTS       0x40    /* tx with RTS/CTS */
  344 #define IEEE80211_BPF_CTS       0x80    /* tx with CTS only */
  345         uint8_t         ibp_pri;        /* WME/WMM AC+tx antenna */
  346         uint8_t         ibp_try0;       /* series 1 try count */
  347         uint8_t         ibp_rate0;      /* series 1 IEEE tx rate */
  348         uint8_t         ibp_power;      /* tx power (device units) */
  349         uint8_t         ibp_ctsrate;    /* IEEE tx rate for CTS */
  350         uint8_t         ibp_try1;       /* series 2 try count */
  351         uint8_t         ibp_rate1;      /* series 2 IEEE tx rate */
  352         uint8_t         ibp_try2;       /* series 3 try count */
  353         uint8_t         ibp_rate2;      /* series 3 IEEE tx rate */
  354         uint8_t         ibp_try3;       /* series 4 try count */
  355         uint8_t         ibp_rate3;      /* series 4 IEEE tx rate */
  356 };
  357 #endif /* _NET80211_IEEE80211_FREEBSD_H_ */

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