The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2003-2005 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  * 3. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/6.0/sys/net80211/ieee80211_freebsd.c 149772 2005-09-03 22:40:02Z sam $");
   30 
   31 /*
   32  * IEEE 802.11 support (FreeBSD-specific code)
   33  */
   34 #include <sys/param.h>
   35 #include <sys/kernel.h>
   36 #include <sys/systm.h> 
   37 #include <sys/linker.h>
   38 #include <sys/mbuf.h>   
   39 #include <sys/module.h>
   40 #include <sys/proc.h>
   41 #include <sys/sysctl.h>
   42 
   43 #include <sys/socket.h>
   44 
   45 #include <net/if.h>
   46 #include <net/if_media.h>
   47 #include <net/ethernet.h>
   48 #include <net/route.h>
   49 
   50 #include <net80211/ieee80211_var.h>
   51 
   52 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
   53 
   54 #ifdef IEEE80211_DEBUG
   55 int     ieee80211_debug = 0;
   56 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
   57             0, "debugging printfs");
   58 #endif
   59 
   60 static int
   61 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
   62 {
   63         int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
   64         int error;
   65 
   66         error = sysctl_handle_int(oidp, &inact, 0, req);
   67         if (error || !req->newptr)
   68                 return error;
   69         *(int *)arg1 = inact / IEEE80211_INACT_WAIT;
   70         return 0;
   71 }
   72 
   73 static int
   74 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
   75 {
   76         struct ieee80211com *ic = arg1;
   77         const char *name = ic->ic_ifp->if_xname;
   78 
   79         return SYSCTL_OUT(req, name, strlen(name));
   80 }
   81 
   82 void
   83 ieee80211_sysctl_attach(struct ieee80211com *ic)
   84 {
   85         struct sysctl_ctx_list *ctx;
   86         struct sysctl_oid *oid;
   87         char num[14];                   /* sufficient for 32 bits */
   88 
   89         MALLOC(ctx, struct sysctl_ctx_list *, sizeof(struct sysctl_ctx_list),
   90                 M_DEVBUF, M_NOWAIT | M_ZERO);
   91         if (ctx == NULL) {
   92                 if_printf(ic->ic_ifp, "%s: cannot allocate sysctl context!\n",
   93                         __func__);
   94                 return;
   95         }
   96         sysctl_ctx_init(ctx);
   97         snprintf(num, sizeof(num), "%u", ic->ic_vap);
   98         oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
   99                 OID_AUTO, num, CTLFLAG_RD, NULL, "");
  100         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  101                 "%parent", CTLFLAG_RD, ic, 0, ieee80211_sysctl_parent, "A",
  102                 "parent device");
  103 #ifdef IEEE80211_DEBUG
  104         ic->ic_debug = ieee80211_debug;
  105         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  106                 "debug", CTLFLAG_RW, &ic->ic_debug, 0,
  107                 "control debugging printfs");
  108 #endif
  109         /* XXX inherit from tunables */
  110         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  111                 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_run, 0,
  112                 ieee80211_sysctl_inact, "I",
  113                 "station inactivity timeout (sec)");
  114         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  115                 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_probe, 0,
  116                 ieee80211_sysctl_inact, "I",
  117                 "station inactivity probe timeout (sec)");
  118         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  119                 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_auth, 0,
  120                 ieee80211_sysctl_inact, "I",
  121                 "station authentication timeout (sec)");
  122         SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  123                 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &ic->ic_inact_init, 0,
  124                 ieee80211_sysctl_inact, "I",
  125                 "station initial state timeout (sec)");
  126         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  127                 "driver_caps", CTLFLAG_RW, &ic->ic_caps, 0,
  128                 "driver capabilities");
  129         ic->ic_sysctl = ctx;
  130 }
  131 
  132 void
  133 ieee80211_sysctl_detach(struct ieee80211com *ic)
  134 {
  135 
  136         if (ic->ic_sysctl != NULL) {
  137                 sysctl_ctx_free(ic->ic_sysctl);
  138                 ic->ic_sysctl = NULL;
  139         }
  140 }
  141 
  142 int
  143 ieee80211_node_dectestref(struct ieee80211_node *ni)
  144 {
  145         /* XXX need equivalent of atomic_dec_and_test */
  146         atomic_subtract_int(&ni->ni_refcnt, 1);
  147         return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
  148 }
  149 
  150 /*
  151  * Allocate and setup a management frame of the specified
  152  * size.  We return the mbuf and a pointer to the start
  153  * of the contiguous data area that's been reserved based
  154  * on the packet length.  The data area is forced to 32-bit
  155  * alignment and the buffer length to a multiple of 4 bytes.
  156  * This is done mainly so beacon frames (that require this)
  157  * can use this interface too.
  158  */
  159 struct mbuf *
  160 ieee80211_getmgtframe(u_int8_t **frm, u_int pktlen)
  161 {
  162         struct mbuf *m;
  163         u_int len;
  164 
  165         /*
  166          * NB: we know the mbuf routines will align the data area
  167          *     so we don't need to do anything special.
  168          */
  169         /* XXX 4-address frame? */
  170         len = roundup(sizeof(struct ieee80211_frame) + pktlen, 4);
  171         KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
  172         if (len < MINCLSIZE) {
  173                 m = m_gethdr(M_NOWAIT, MT_HEADER);
  174                 /*
  175                  * Align the data in case additional headers are added.
  176                  * This should only happen when a WEP header is added
  177                  * which only happens for shared key authentication mgt
  178                  * frames which all fit in MHLEN.
  179                  */
  180                 if (m != NULL)
  181                         MH_ALIGN(m, len);
  182         } else
  183                 m = m_getcl(M_NOWAIT, MT_HEADER, M_PKTHDR);
  184         if (m != NULL) {
  185                 m->m_data += sizeof(struct ieee80211_frame);
  186                 *frm = m->m_data;
  187         }
  188         return m;
  189 }
  190 
  191 #include <sys/libkern.h>
  192 
  193 void
  194 get_random_bytes(void *p, size_t n)
  195 {
  196         u_int8_t *dp = p;
  197 
  198         while (n > 0) {
  199                 u_int32_t v = arc4random();
  200                 size_t nb = n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n;
  201                 bcopy(&v, dp, n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n);
  202                 dp += sizeof(u_int32_t), n -= nb;
  203         }
  204 }
  205 
  206 void
  207 ieee80211_notify_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int newassoc)
  208 {
  209         struct ifnet *ifp = ic->ic_ifp;
  210         struct ieee80211_join_event iev;
  211 
  212         memset(&iev, 0, sizeof(iev));
  213         if (ni == ic->ic_bss) {
  214                 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_bssid);
  215                 rt_ieee80211msg(ifp, newassoc ?
  216                         RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC,
  217                         &iev, sizeof(iev));
  218                 if_link_state_change(ifp, LINK_STATE_UP);
  219         } else {
  220                 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
  221                 rt_ieee80211msg(ifp, newassoc ?
  222                         RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN,
  223                         &iev, sizeof(iev));
  224         }
  225 }
  226 
  227 void
  228 ieee80211_notify_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
  229 {
  230         struct ifnet *ifp = ic->ic_ifp;
  231         struct ieee80211_leave_event iev;
  232 
  233         if (ni == ic->ic_bss) {
  234                 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
  235                 if_link_state_change(ifp, LINK_STATE_DOWN);
  236         } else {
  237                 /* fire off wireless event station leaving */
  238                 memset(&iev, 0, sizeof(iev));
  239                 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr);
  240                 rt_ieee80211msg(ifp, RTM_IEEE80211_LEAVE, &iev, sizeof(iev));
  241         }
  242 }
  243 
  244 void
  245 ieee80211_notify_scan_done(struct ieee80211com *ic)
  246 {
  247         struct ifnet *ifp = ic->ic_ifp;
  248 
  249         IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
  250                 "%s: notify scan done\n", ic->ic_ifp->if_xname);
  251 
  252         /* dispatch wireless event indicating scan completed */
  253         rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
  254 }
  255 
  256 void
  257 ieee80211_notify_replay_failure(struct ieee80211com *ic,
  258         const struct ieee80211_frame *wh, const struct ieee80211_key *k,
  259         u_int64_t rsc)
  260 {
  261         struct ifnet *ifp = ic->ic_ifp;
  262 
  263         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  264             "[%s] %s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>\n",
  265             ether_sprintf(wh->i_addr2), k->wk_cipher->ic_name,
  266             (intmax_t) rsc, (intmax_t) k->wk_keyrsc,
  267             k->wk_keyix, k->wk_rxkeyix);
  268 
  269         if (ifp != NULL) {              /* NB: for cipher test modules */
  270                 struct ieee80211_replay_event iev;
  271 
  272                 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
  273                 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
  274                 iev.iev_cipher = k->wk_cipher->ic_cipher;
  275                 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
  276                         iev.iev_keyix = k->wk_rxkeyix;
  277                 else
  278                         iev.iev_keyix = k->wk_keyix;
  279                 iev.iev_keyrsc = k->wk_keyrsc;
  280                 iev.iev_rsc = rsc;
  281                 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
  282         }
  283 }
  284 
  285 void
  286 ieee80211_notify_michael_failure(struct ieee80211com *ic,
  287         const struct ieee80211_frame *wh, u_int keyix)
  288 {
  289         struct ifnet *ifp = ic->ic_ifp;
  290 
  291         IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
  292                 "[%s] michael MIC verification failed <keyix %u>\n",
  293                ether_sprintf(wh->i_addr2), keyix);
  294         ic->ic_stats.is_rx_tkipmic++;
  295 
  296         if (ifp != NULL) {              /* NB: for cipher test modules */
  297                 struct ieee80211_michael_event iev;
  298 
  299                 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
  300                 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
  301                 iev.iev_cipher = IEEE80211_CIPHER_TKIP;
  302                 iev.iev_keyix = keyix;
  303                 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
  304         }
  305 }
  306 
  307 void
  308 ieee80211_load_module(const char *modname)
  309 {
  310 #ifdef notyet
  311         struct thread *td = curthread;
  312 
  313         if (suser(td) == 0 && securelevel_gt(td->td_ucred, 0) == 0) {
  314                 mtx_lock(&Giant);
  315                 (void) linker_load_module(modname, NULL, NULL, NULL, NULL);
  316                 mtx_unlock(&Giant);
  317         }
  318 #else
  319         printf("%s: load the %s module by hand for now.\n", __func__, modname);
  320 #endif
  321 }
  322 
  323 /*
  324  * Module glue.
  325  *
  326  * NB: the module name is "wlan" for compatibility with NetBSD.
  327  */
  328 static int
  329 wlan_modevent(module_t mod, int type, void *unused)
  330 {
  331         switch (type) {
  332         case MOD_LOAD:
  333                 if (bootverbose)
  334                         printf("wlan: <802.11 Link Layer>\n");
  335                 return 0;
  336         case MOD_UNLOAD:
  337                 return 0;
  338         }
  339         return EINVAL;
  340 }
  341 
  342 static moduledata_t wlan_mod = {
  343         "wlan",
  344         wlan_modevent,
  345         0
  346 };
  347 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
  348 MODULE_VERSION(wlan, 1);
  349 MODULE_DEPEND(wlan, ether, 1, 1, 1);

Cache object: 22729a054f52b6e3dfbf4a0ecf9df5e9


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.