The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_action.c

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    1 /*-
    2  * Copyright (c) 2009 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 
   26 #include <sys/cdefs.h>
   27 #ifdef __FreeBSD__
   28 __FBSDID("$FreeBSD$");
   29 #endif
   30 
   31 /*
   32  * IEEE 802.11 send/recv action frame support.
   33  */
   34 
   35 #include "opt_inet.h"
   36 #include "opt_wlan.h"
   37 
   38 #include <sys/param.h>
   39 #include <sys/kernel.h>
   40 #include <sys/malloc.h>
   41 #include <sys/systm.h> 
   42  
   43 #include <sys/socket.h>
   44 
   45 #include <net/if.h>
   46 #include <net/if_var.h>
   47 #include <net/if_media.h>
   48 #include <net/ethernet.h>
   49 
   50 #include <net80211/ieee80211_var.h>
   51 #include <net80211/ieee80211_action.h>
   52 #include <net80211/ieee80211_mesh.h>
   53 
   54 static int
   55 send_inval(struct ieee80211_node *ni, int cat, int act, void *sa)
   56 {
   57         return EINVAL;
   58 }
   59 
   60 static ieee80211_send_action_func *ba_send_action[8] = {
   61         send_inval, send_inval, send_inval, send_inval,
   62         send_inval, send_inval, send_inval, send_inval,
   63 };
   64 static ieee80211_send_action_func *ht_send_action[8] = {
   65         send_inval, send_inval, send_inval, send_inval,
   66         send_inval, send_inval, send_inval, send_inval,
   67 };
   68 static ieee80211_send_action_func *meshpl_send_action[8] = {
   69         send_inval, send_inval, send_inval, send_inval,
   70         send_inval, send_inval, send_inval, send_inval,
   71 };
   72 static ieee80211_send_action_func *meshaction_send_action[12] = {
   73         send_inval, send_inval, send_inval, send_inval,
   74         send_inval, send_inval, send_inval, send_inval,
   75         send_inval, send_inval, send_inval, send_inval,
   76 };
   77 static ieee80211_send_action_func *vendor_send_action[8] = {
   78         send_inval, send_inval, send_inval, send_inval,
   79         send_inval, send_inval, send_inval, send_inval,
   80 };
   81 
   82 static ieee80211_send_action_func *vht_send_action[3] = {
   83         send_inval, send_inval, send_inval,
   84 };
   85 
   86 int
   87 ieee80211_send_action_register(int cat, int act, ieee80211_send_action_func *f)
   88 {
   89         switch (cat) {
   90         case IEEE80211_ACTION_CAT_BA:
   91                 if (act >= nitems(ba_send_action))
   92                         break;
   93                 ba_send_action[act] = f;
   94                 return 0;
   95         case IEEE80211_ACTION_CAT_HT:
   96                 if (act >= nitems(ht_send_action))
   97                         break;
   98                 ht_send_action[act] = f;
   99                 return 0;
  100         case IEEE80211_ACTION_CAT_SELF_PROT:
  101                 if (act >= nitems(meshpl_send_action))
  102                         break;
  103                 meshpl_send_action[act] = f;
  104                 return 0;
  105         case IEEE80211_ACTION_CAT_MESH:
  106                 if (act >= nitems(meshaction_send_action))
  107                         break;
  108                 meshaction_send_action[act] = f;
  109                 return 0;
  110         case IEEE80211_ACTION_CAT_VENDOR:
  111                 if (act >= nitems(vendor_send_action))
  112                         break;
  113                 vendor_send_action[act] = f;
  114                 return 0;
  115         case IEEE80211_ACTION_CAT_VHT:
  116                 if (act >= nitems(vht_send_action))
  117                         break;
  118                 vht_send_action[act] = f;
  119                 return 0;
  120         }
  121         return EINVAL;
  122 }
  123 
  124 void
  125 ieee80211_send_action_unregister(int cat, int act)
  126 {
  127         ieee80211_send_action_register(cat, act, send_inval);
  128 }
  129 
  130 int
  131 ieee80211_send_action(struct ieee80211_node *ni, int cat, int act, void *sa)
  132 {
  133         ieee80211_send_action_func *f = send_inval;
  134 
  135         switch (cat) {
  136         case IEEE80211_ACTION_CAT_BA:
  137                 if (act < nitems(ba_send_action))
  138                         f = ba_send_action[act];
  139                 break;
  140         case IEEE80211_ACTION_CAT_HT:
  141                 if (act < nitems(ht_send_action))
  142                         f = ht_send_action[act];
  143                 break;
  144         case IEEE80211_ACTION_CAT_SELF_PROT:
  145                 if (act < nitems(meshpl_send_action))
  146                         f = meshpl_send_action[act];
  147                 break;
  148         case IEEE80211_ACTION_CAT_MESH:
  149                 if (act < nitems(meshaction_send_action))
  150                         f = meshaction_send_action[act];
  151                 break;
  152         case IEEE80211_ACTION_CAT_VENDOR:
  153                 if (act < nitems(vendor_send_action))
  154                         f = vendor_send_action[act];
  155                 break;
  156         case IEEE80211_ACTION_CAT_VHT:
  157                 if (act < nitems(vht_send_action))
  158                         f = vht_send_action[act];
  159                 break;
  160         }
  161         return f(ni, cat, act, sa);
  162 }
  163 
  164 static int
  165 recv_inval(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
  166         const uint8_t *frm, const uint8_t *efrm)
  167 {
  168         return EINVAL;
  169 }
  170 
  171 static ieee80211_recv_action_func *ba_recv_action[8] = {
  172         recv_inval, recv_inval, recv_inval, recv_inval,
  173         recv_inval, recv_inval, recv_inval, recv_inval,
  174 };
  175 static ieee80211_recv_action_func *ht_recv_action[8] = {
  176         recv_inval, recv_inval, recv_inval, recv_inval,
  177         recv_inval, recv_inval, recv_inval, recv_inval,
  178 };
  179 static ieee80211_recv_action_func *meshpl_recv_action[8] = {
  180         recv_inval, recv_inval, recv_inval, recv_inval,
  181         recv_inval, recv_inval, recv_inval, recv_inval,
  182 };
  183 static ieee80211_recv_action_func *meshaction_recv_action[12] = {
  184         recv_inval, recv_inval, recv_inval, recv_inval,
  185         recv_inval, recv_inval, recv_inval, recv_inval,
  186         recv_inval, recv_inval, recv_inval, recv_inval,
  187 };
  188 static ieee80211_recv_action_func *vendor_recv_action[8] = {
  189         recv_inval, recv_inval, recv_inval, recv_inval,
  190         recv_inval, recv_inval, recv_inval, recv_inval,
  191 };
  192 
  193 static ieee80211_recv_action_func *vht_recv_action[3] = {
  194         recv_inval, recv_inval, recv_inval
  195 };
  196 
  197 int
  198 ieee80211_recv_action_register(int cat, int act, ieee80211_recv_action_func *f)
  199 {
  200         switch (cat) {
  201         case IEEE80211_ACTION_CAT_BA:
  202                 if (act >= nitems(ba_recv_action))
  203                         break;
  204                 ba_recv_action[act] = f;
  205                 return 0;
  206         case IEEE80211_ACTION_CAT_HT:
  207                 if (act >= nitems(ht_recv_action))
  208                         break;
  209                 ht_recv_action[act] = f;
  210                 return 0;
  211         case IEEE80211_ACTION_CAT_SELF_PROT:
  212                 if (act >= nitems(meshpl_recv_action))
  213                         break;
  214                 meshpl_recv_action[act] = f;
  215                 return 0;
  216         case IEEE80211_ACTION_CAT_MESH:
  217                 if (act >= nitems(meshaction_recv_action))
  218                         break;
  219                 meshaction_recv_action[act] = f;
  220                 return 0;
  221         case IEEE80211_ACTION_CAT_VENDOR:
  222                 if (act >= nitems(vendor_recv_action))
  223                         break;
  224                 vendor_recv_action[act] = f;
  225                 return 0;
  226         case IEEE80211_ACTION_CAT_VHT:
  227                 if (act >= nitems(vht_recv_action))
  228                         break;
  229                 vht_recv_action[act] = f;
  230                 return 0;
  231         }
  232         return EINVAL;
  233 }
  234 
  235 void
  236 ieee80211_recv_action_unregister(int cat, int act)
  237 {
  238         ieee80211_recv_action_register(cat, act, recv_inval);
  239 }
  240 
  241 int
  242 ieee80211_recv_action(struct ieee80211_node *ni,
  243         const struct ieee80211_frame *wh,
  244         const uint8_t *frm, const uint8_t *efrm)
  245 {
  246         ieee80211_recv_action_func *f = recv_inval;
  247         struct ieee80211vap *vap = ni->ni_vap;
  248         const struct ieee80211_action *ia =
  249             (const struct ieee80211_action *) frm;
  250 
  251         switch (ia->ia_category) {
  252         case IEEE80211_ACTION_CAT_BA:
  253                 if (ia->ia_action < nitems(ba_recv_action))
  254                         f = ba_recv_action[ia->ia_action];
  255                 break;
  256         case IEEE80211_ACTION_CAT_HT:
  257                 if (ia->ia_action < nitems(ht_recv_action))
  258                         f = ht_recv_action[ia->ia_action];
  259                 break;
  260         case IEEE80211_ACTION_CAT_SELF_PROT:
  261                 if (ia->ia_action < nitems(meshpl_recv_action))
  262                         f = meshpl_recv_action[ia->ia_action];
  263                 break;
  264         case IEEE80211_ACTION_CAT_MESH:
  265                 if (ni == vap->iv_bss ||
  266                     ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
  267                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
  268                             ni->ni_macaddr, NULL,
  269                             "peer link not yet established (%d), cat %s act %u",
  270                             ni->ni_mlstate, "mesh action", ia->ia_action);
  271                         vap->iv_stats.is_mesh_nolink++;
  272                         break;
  273                 }
  274                 if (ia->ia_action < nitems(meshaction_recv_action))
  275                         f = meshaction_recv_action[ia->ia_action];
  276                 break;
  277         case IEEE80211_ACTION_CAT_VENDOR:
  278                 if (ia->ia_action < nitems(vendor_recv_action))
  279                         f = vendor_recv_action[ia->ia_action];
  280                 break;
  281         case IEEE80211_ACTION_CAT_VHT:
  282                 if (ia->ia_action < nitems(vht_recv_action))
  283                         f = vht_recv_action[ia->ia_action];
  284                 break;
  285         }
  286         return f(ni, wh, frm, efrm);
  287 }

Cache object: f71a5d0c2da8ffba9710adb948cf2595


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