sys/net80211/ieee80211_action.c

   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 int
  83 ieee80211_send_action_register(int cat, int act, ieee80211_send_action_func *f)
  84 {
  85         switch (cat) {
  86         case IEEE80211_ACTION_CAT_BA:
  87                 if (act >= nitems(ba_send_action))
  88                         break;
  89                 ba_send_action[act] = f;
  90                 return 0;
  91         case IEEE80211_ACTION_CAT_HT:
  92                 if (act >= nitems(ht_send_action))
  93                         break;
  94                 ht_send_action[act] = f;
  95                 return 0;
  96         case IEEE80211_ACTION_CAT_SELF_PROT:
  97                 if (act >= nitems(meshpl_send_action))
  98                         break;
  99                 meshpl_send_action[act] = f;
 100                 return 0;
 101         case IEEE80211_ACTION_CAT_MESH:
 102                 if (act >= nitems(meshaction_send_action))
 103                         break;
 104                 meshaction_send_action[act] = f;
 105                 return 0;
 106         case IEEE80211_ACTION_CAT_VENDOR:
 107                 if (act >= nitems(vendor_send_action))
 108                         break;
 109                 vendor_send_action[act] = f;
 110                 return 0;
 111         }
 112         return EINVAL;
 113 }
 114
 115 void
 116 ieee80211_send_action_unregister(int cat, int act)
 117 {
 118         ieee80211_send_action_register(cat, act, send_inval);
 119 }
 120
 121 int
 122 ieee80211_send_action(struct ieee80211_node *ni, int cat, int act, void *sa)
 123 {
 124         ieee80211_send_action_func *f = send_inval;
 125
 126         switch (cat) {
 127         case IEEE80211_ACTION_CAT_BA:
 128                 if (act < nitems(ba_send_action))
 129                         f = ba_send_action[act];
 130                 break;
 131         case IEEE80211_ACTION_CAT_HT:
 132                 if (act < nitems(ht_send_action))
 133                         f = ht_send_action[act];
 134                 break;
 135         case IEEE80211_ACTION_CAT_SELF_PROT:
 136                 if (act < nitems(meshpl_send_action))
 137                         f = meshpl_send_action[act];
 138                 break;
 139         case IEEE80211_ACTION_CAT_MESH:
 140                 if (act < nitems(meshaction_send_action))
 141                         f = meshaction_send_action[act];
 142                 break;
 143         case IEEE80211_ACTION_CAT_VENDOR:
 144                 if (act < nitems(vendor_send_action))
 145                         f = vendor_send_action[act];
 146                 break;
 147         }
 148         return f(ni, cat, act, sa);
 149 }
 150
 151 static int
 152 recv_inval(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
 153         const uint8_t *frm, const uint8_t *efrm)
 154 {
 155         return EINVAL;
 156 }
 157
 158 static ieee80211_recv_action_func *ba_recv_action[8] = {
 159         recv_inval, recv_inval, recv_inval, recv_inval,
 160         recv_inval, recv_inval, recv_inval, recv_inval,
 161 };
 162 static ieee80211_recv_action_func *ht_recv_action[8] = {
 163         recv_inval, recv_inval, recv_inval, recv_inval,
 164         recv_inval, recv_inval, recv_inval, recv_inval,
 165 };
 166 static ieee80211_recv_action_func *meshpl_recv_action[8] = {
 167         recv_inval, recv_inval, recv_inval, recv_inval,
 168         recv_inval, recv_inval, recv_inval, recv_inval,
 169 };
 170 static ieee80211_recv_action_func *meshaction_recv_action[12] = {
 171         recv_inval, recv_inval, recv_inval, recv_inval,
 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 *vendor_recv_action[8] = {
 176         recv_inval, recv_inval, recv_inval, recv_inval,
 177         recv_inval, recv_inval, recv_inval, recv_inval,
 178 };
 179
 180 int
 181 ieee80211_recv_action_register(int cat, int act, ieee80211_recv_action_func *f)
 182 {
 183         switch (cat) {
 184         case IEEE80211_ACTION_CAT_BA:
 185                 if (act >= nitems(ba_recv_action))
 186                         break;
 187                 ba_recv_action[act] = f;
 188                 return 0;
 189         case IEEE80211_ACTION_CAT_HT:
 190                 if (act >= nitems(ht_recv_action))
 191                         break;
 192                 ht_recv_action[act] = f;
 193                 return 0;
 194         case IEEE80211_ACTION_CAT_SELF_PROT:
 195                 if (act >= nitems(meshpl_recv_action))
 196                         break;
 197                 meshpl_recv_action[act] = f;
 198                 return 0;
 199         case IEEE80211_ACTION_CAT_MESH:
 200                 if (act >= nitems(meshaction_recv_action))
 201                         break;
 202                 meshaction_recv_action[act] = f;
 203                 return 0;
 204         case IEEE80211_ACTION_CAT_VENDOR:
 205                 if (act >= nitems(vendor_recv_action))
 206                         break;
 207                 vendor_recv_action[act] = f;
 208                 return 0;
 209         }
 210         return EINVAL;
 211 }
 212
 213 void
 214 ieee80211_recv_action_unregister(int cat, int act)
 215 {
 216         ieee80211_recv_action_register(cat, act, recv_inval);
 217 }
 218
 219 int
 220 ieee80211_recv_action(struct ieee80211_node *ni,
 221         const struct ieee80211_frame *wh,
 222         const uint8_t *frm, const uint8_t *efrm)
 223 {
 224         ieee80211_recv_action_func *f = recv_inval;
 225         struct ieee80211vap *vap = ni->ni_vap;
 226         const struct ieee80211_action *ia =
 227             (const struct ieee80211_action *) frm;
 228
 229         switch (ia->ia_category) {
 230         case IEEE80211_ACTION_CAT_BA:
 231                 if (ia->ia_action < nitems(ba_recv_action))
 232                         f = ba_recv_action[ia->ia_action];
 233                 break;
 234         case IEEE80211_ACTION_CAT_HT:
 235                 if (ia->ia_action < nitems(ht_recv_action))
 236                         f = ht_recv_action[ia->ia_action];
 237                 break;
 238         case IEEE80211_ACTION_CAT_SELF_PROT:
 239                 if (ia->ia_action < nitems(meshpl_recv_action))
 240                         f = meshpl_recv_action[ia->ia_action];
 241                 break;
 242         case IEEE80211_ACTION_CAT_MESH:
 243                 if (ni == vap->iv_bss ||
 244                     ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 245                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
 246                             ni->ni_macaddr, NULL,
 247                             "peer link not yet established (%d), cat %s act %u",
 248                             ni->ni_mlstate, "mesh action", ia->ia_action);
 249                         vap->iv_stats.is_mesh_nolink++;
 250                         break;
 251                 }
 252                 if (ia->ia_action < nitems(meshaction_recv_action))
 253                         f = meshaction_recv_action[ia->ia_action];
 254                 break;
 255         case IEEE80211_ACTION_CAT_VENDOR:
 256                 if (ia->ia_action < nitems(vendor_recv_action))
 257                         f = vendor_recv_action[ia->ia_action];
 258                 break;
 259         }
 260         return f(ni, wh, frm, efrm);
 261 }