drivers/staging/rtl8187se/ieee80211/dot11d.c

   1 #ifdef ENABLE_DOT11D
   2 //-----------------------------------------------------------------------------
   3 //      File:
   4 //              Dot11d.c
   5 //
   6 //      Description:
   7 //              Implement 802.11d.
   8 //
   9 //-----------------------------------------------------------------------------
  10
  11 #include "dot11d.h"
  12
  13 void
  14 Dot11d_Init(struct ieee80211_device *ieee)
  15 {
  16         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(ieee);
  17
  18         pDot11dInfo->bEnabled = 0;
  19
  20         pDot11dInfo->State = DOT11D_STATE_NONE;
  21         pDot11dInfo->CountryIeLen = 0;
  22         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
  23         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
  24         RESET_CIE_WATCHDOG(ieee);
  25
  26         printk("Dot11d_Init()\n");
  27 }
  28
  29 //
  30 //      Description:
  31 //              Reset to the state as we are just entering a regulatory domain.
  32 //
  33 void
  34 Dot11d_Reset(struct ieee80211_device *ieee)
  35 {
  36         u32 i;
  37         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(ieee);
  38
  39         // Clear old channel map
  40         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
  41         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
  42         // Set new channel map
  43         for (i=1; i<=11; i++) {
  44                 (pDot11dInfo->channel_map)[i] = 1;
  45         }
  46         for (i=12; i<=14; i++) {
  47                 (pDot11dInfo->channel_map)[i] = 2;
  48         }
  49
  50         pDot11dInfo->State = DOT11D_STATE_NONE;
  51         pDot11dInfo->CountryIeLen = 0;
  52         RESET_CIE_WATCHDOG(ieee);
  53
  54         //printk("Dot11d_Reset()\n");
  55 }
  56
  57 //
  58 //      Description:
  59 //              Update country IE from Beacon or Probe Resopnse
  60 //              and configure PHY for operation in the regulatory domain.
  61 //
  62 //      TODO:
  63 //              Configure Tx power.
  64 //
  65 //      Assumption:
  66 //              1. IS_DOT11D_ENABLE() is TRUE.
  67 //              2. Input IE is an valid one.
  68 //
  69 void
  70 Dot11d_UpdateCountryIe(
  71         struct ieee80211_device *dev,
  72         u8 *            pTaddr,
  73         u16     CoutryIeLen,
  74         u8 * pCoutryIe
  75         )
  76 {
  77         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
  78         u8 i, j, NumTriples, MaxChnlNum;
  79         PCHNL_TXPOWER_TRIPLE pTriple;
  80
  81         if((CoutryIeLen - 3)%3 != 0)
  82         {
  83                 printk("Dot11d_UpdateCountryIe(): Invalid country IE, skip it........1\n");
  84                 Dot11d_Reset(dev);
  85                 return;
  86         }
  87
  88         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
  89         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
  90         MaxChnlNum = 0;
  91         NumTriples = (CoutryIeLen - 3) / 3; // skip 3-byte country string.
  92         pTriple = (PCHNL_TXPOWER_TRIPLE)(pCoutryIe + 3);
  93         for(i = 0; i < NumTriples; i++)
  94         {
  95                 if(MaxChnlNum >= pTriple->FirstChnl)
  96                 { // It is not in a monotonically increasing order, so stop processing.
  97                         printk("Dot11d_UpdateCountryIe(): Invalid country IE, skip it........1\n");
  98                         Dot11d_Reset(dev);
  99                         return;
 100                 }
 101                 if(MAX_CHANNEL_NUMBER < (pTriple->FirstChnl + pTriple->NumChnls))
 102                 { // It is not a valid set of channel id, so stop processing.
 103                         printk("Dot11d_UpdateCountryIe(): Invalid country IE, skip it........2\n");
 104                         Dot11d_Reset(dev);
 105                         return;
 106                 }
 107
 108                 for(j = 0 ; j < pTriple->NumChnls; j++)
 109                 {
 110                         pDot11dInfo->channel_map[pTriple->FirstChnl + j] = 1;
 111                         pDot11dInfo->MaxTxPwrDbmList[pTriple->FirstChnl + j] = pTriple->MaxTxPowerInDbm;
 112                         MaxChnlNum = pTriple->FirstChnl + j;
 113                 }
 114
 115                 pTriple = (PCHNL_TXPOWER_TRIPLE)((u8*)pTriple + 3);
 116         }
 117 #if 1
 118         //printk("Dot11d_UpdateCountryIe(): Channel List:\n");
 119         printk("Channel List:");
 120         for(i=1; i<= MAX_CHANNEL_NUMBER; i++)
 121                 if(pDot11dInfo->channel_map[i] > 0)
 122                         printk(" %d", i);
 123         printk("\n");
 124 #endif
 125
 126         UPDATE_CIE_SRC(dev, pTaddr);
 127
 128         pDot11dInfo->CountryIeLen = CoutryIeLen;
 129         memcpy(pDot11dInfo->CountryIeBuf, pCoutryIe,CoutryIeLen);
 130         pDot11dInfo->State = DOT11D_STATE_LEARNED;
 131 }
 132
 133 void dump_chnl_map(u8 * channel_map)
 134 {
 135         int i;
 136         printk("Channel List:");
 137         for(i=1; i<= MAX_CHANNEL_NUMBER; i++)
 138                 if(channel_map[i] > 0)
 139                         printk(" %d(%d)", i, channel_map[i]);
 140         printk("\n");
 141 }
 142
 143 u8
 144 DOT11D_GetMaxTxPwrInDbm(
 145         struct ieee80211_device *dev,
 146         u8 Channel
 147         )
 148 {
 149         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 150         u8 MaxTxPwrInDbm = 255;
 151
 152         if(MAX_CHANNEL_NUMBER < Channel)
 153         {
 154                 printk("DOT11D_GetMaxTxPwrInDbm(): Invalid Channel\n");
 155                 return MaxTxPwrInDbm;
 156         }
 157         if(pDot11dInfo->channel_map[Channel])
 158         {
 159                 MaxTxPwrInDbm = pDot11dInfo->MaxTxPwrDbmList[Channel];
 160         }
 161
 162         return MaxTxPwrInDbm;
 163 }
 164
 165
 166 void
 167 DOT11D_ScanComplete(
 168         struct ieee80211_device * dev
 169         )
 170 {
 171         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 172
 173         switch(pDot11dInfo->State)
 174         {
 175         case DOT11D_STATE_LEARNED:
 176                 pDot11dInfo->State = DOT11D_STATE_DONE;
 177                 break;
 178
 179         case DOT11D_STATE_DONE:
 180                 if( GET_CIE_WATCHDOG(dev) == 0 )
 181                 { // Reset country IE if previous one is gone.
 182                         Dot11d_Reset(dev);
 183                 }
 184                 break;
 185         case DOT11D_STATE_NONE:
 186                 break;
 187         }
 188 }
 189
 190 int IsLegalChannel(
 191         struct ieee80211_device * dev,
 192         u8 channel
 193 )
 194 {
 195         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 196
 197         if(MAX_CHANNEL_NUMBER < channel)
 198         {
 199                 printk("IsLegalChannel(): Invalid Channel\n");
 200                 return 0;
 201         }
 202         if(pDot11dInfo->channel_map[channel] > 0)
 203                 return 1;
 204         return 0;
 205 }
 206
 207 int ToLegalChannel(
 208         struct ieee80211_device * dev,
 209         u8 channel
 210 )
 211 {
 212         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 213         u8 default_chn = 0;
 214         u32 i = 0;
 215
 216         for (i=1; i<= MAX_CHANNEL_NUMBER; i++)
 217         {
 218                 if(pDot11dInfo->channel_map[i] > 0)
 219                 {
 220                         default_chn = i;
 221                         break;
 222                 }
 223         }
 224
 225         if(MAX_CHANNEL_NUMBER < channel)
 226         {
 227                 printk("IsLegalChannel(): Invalid Channel\n");
 228                 return default_chn;
 229         }
 230
 231         if(pDot11dInfo->channel_map[channel] > 0)
 232                 return channel;
 233
 234         return default_chn;
 235 }
 236
 237 #if 0
 238 EXPORT_SYMBOL(Dot11d_Init);
 239 EXPORT_SYMBOL(Dot11d_Reset);
 240 EXPORT_SYMBOL(Dot11d_UpdateCountryIe);
 241 EXPORT_SYMBOL(DOT11D_GetMaxTxPwrInDbm);
 242 EXPORT_SYMBOL(DOT11D_ScanComplete);
 243 EXPORT_SYMBOL(IsLegalChannel);
 244 EXPORT_SYMBOL(ToLegalChannel);
 245 #endif
 246 #endif