drivers/staging/rtl8192e/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 #if 0
  39         if(!pDot11dInfo->bEnabled)
  40                 return;
  41 #endif
  42         // Clear old channel map
  43         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
  44         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
  45         // Set new channel map
  46         for (i=1; i<=11; i++) {
  47                 (pDot11dInfo->channel_map)[i] = 1;
  48         }
  49         for (i=12; i<=14; i++) {
  50                 (pDot11dInfo->channel_map)[i] = 2;
  51         }
  52
  53         pDot11dInfo->State = DOT11D_STATE_NONE;
  54         pDot11dInfo->CountryIeLen = 0;
  55         RESET_CIE_WATCHDOG(ieee);
  56 }
  57
  58 //
  59 //      Description:
  60 //              Update country IE from Beacon or Probe Resopnse
  61 //              and configure PHY for operation in the regulatory domain.
  62 //
  63 //      TODO:
  64 //              Configure Tx power.
  65 //
  66 //      Assumption:
  67 //              1. IS_DOT11D_ENABLE() is TRUE.
  68 //              2. Input IE is an valid one.
  69 //
  70 void
  71 Dot11d_UpdateCountryIe(
  72         struct ieee80211_device *dev,
  73         u8 *            pTaddr,
  74         u16     CoutryIeLen,
  75         u8 * pCoutryIe
  76         )
  77 {
  78         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
  79         u8 i, j, NumTriples, MaxChnlNum;
  80         PCHNL_TXPOWER_TRIPLE pTriple;
  81
  82         memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
  83         memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
  84         MaxChnlNum = 0;
  85         NumTriples = (CoutryIeLen - 3) / 3; // skip 3-byte country string.
  86         pTriple = (PCHNL_TXPOWER_TRIPLE)(pCoutryIe + 3);
  87         for(i = 0; i < NumTriples; i++)
  88         {
  89                 if(MaxChnlNum >= pTriple->FirstChnl)
  90                 { // It is not in a monotonically increasing order, so stop processing.
  91                         printk("Dot11d_UpdateCountryIe(): Invalid country IE, skip it........1\n");
  92                         return;
  93                 }
  94                 if(MAX_CHANNEL_NUMBER < (pTriple->FirstChnl + pTriple->NumChnls))
  95                 { // It is not a valid set of channel id, so stop processing.
  96                         printk("Dot11d_UpdateCountryIe(): Invalid country IE, skip it........2\n");
  97                         return;
  98                 }
  99
 100                 for(j = 0 ; j < pTriple->NumChnls; j++)
 101                 {
 102                         pDot11dInfo->channel_map[pTriple->FirstChnl + j] = 1;
 103                         pDot11dInfo->MaxTxPwrDbmList[pTriple->FirstChnl + j] = pTriple->MaxTxPowerInDbm;
 104                         MaxChnlNum = pTriple->FirstChnl + j;
 105                 }
 106
 107                 pTriple = (PCHNL_TXPOWER_TRIPLE)((u8*)pTriple + 3);
 108         }
 109 #if 1
 110         printk("Channel List:");
 111         for(i=1; i<= MAX_CHANNEL_NUMBER; i++)
 112                 if(pDot11dInfo->channel_map[i] > 0)
 113                         printk(" %d", i);
 114         printk("\n");
 115 #endif
 116
 117         UPDATE_CIE_SRC(dev, pTaddr);
 118
 119         pDot11dInfo->CountryIeLen = CoutryIeLen;
 120         memcpy(pDot11dInfo->CountryIeBuf, pCoutryIe,CoutryIeLen);
 121         pDot11dInfo->State = DOT11D_STATE_LEARNED;
 122 }
 123
 124
 125 u8
 126 DOT11D_GetMaxTxPwrInDbm(
 127         struct ieee80211_device *dev,
 128         u8 Channel
 129         )
 130 {
 131         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 132         u8 MaxTxPwrInDbm = 255;
 133
 134         if(MAX_CHANNEL_NUMBER < Channel)
 135         {
 136                 printk("DOT11D_GetMaxTxPwrInDbm(): Invalid Channel\n");
 137                 return MaxTxPwrInDbm;
 138         }
 139         if(pDot11dInfo->channel_map[Channel])
 140         {
 141                 MaxTxPwrInDbm = pDot11dInfo->MaxTxPwrDbmList[Channel];
 142         }
 143
 144         return MaxTxPwrInDbm;
 145 }
 146
 147
 148 void
 149 DOT11D_ScanComplete(
 150         struct ieee80211_device * dev
 151         )
 152 {
 153         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 154
 155         switch(pDot11dInfo->State)
 156         {
 157         case DOT11D_STATE_LEARNED:
 158                 pDot11dInfo->State = DOT11D_STATE_DONE;
 159                 break;
 160
 161         case DOT11D_STATE_DONE:
 162                 if( GET_CIE_WATCHDOG(dev) == 0 )
 163                 { // Reset country IE if previous one is gone.
 164                         Dot11d_Reset(dev);
 165                 }
 166                 break;
 167         case DOT11D_STATE_NONE:
 168                 break;
 169         }
 170 }
 171
 172 int IsLegalChannel(
 173         struct ieee80211_device * dev,
 174         u8 channel
 175 )
 176 {
 177         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 178
 179         if(MAX_CHANNEL_NUMBER < channel)
 180         {
 181                 printk("IsLegalChannel(): Invalid Channel\n");
 182                 return 0;
 183         }
 184         if(pDot11dInfo->channel_map[channel] > 0)
 185                 return 1;
 186         return 0;
 187 }
 188
 189 int ToLegalChannel(
 190         struct ieee80211_device * dev,
 191         u8 channel
 192 )
 193 {
 194         PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
 195         u8 default_chn = 0;
 196         u32 i = 0;
 197
 198         for (i=1; i<= MAX_CHANNEL_NUMBER; i++)
 199         {
 200                 if(pDot11dInfo->channel_map[i] > 0)
 201                 {
 202                         default_chn = i;
 203                         break;
 204                 }
 205         }
 206
 207         if(MAX_CHANNEL_NUMBER < channel)
 208         {
 209                 printk("IsLegalChannel(): Invalid Channel\n");
 210                 return default_chn;
 211         }
 212
 213         if(pDot11dInfo->channel_map[channel] > 0)
 214                 return channel;
 215
 216         return default_chn;
 217 }
 218 #endif