176 lines
4.7 KiB
C
176 lines
4.7 KiB
C
/* Implement 802.11d. */
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#include "dot11d.h"
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void Dot11d_Init(struct ieee80211_device *ieee)
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{
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PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(ieee);
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pDot11dInfo->bEnabled = false;
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pDot11dInfo->State = DOT11D_STATE_NONE;
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pDot11dInfo->CountryIeLen = 0;
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memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
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memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
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RESET_CIE_WATCHDOG(ieee);
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netdev_info(ieee->dev, "Dot11d_Init()\n");
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}
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EXPORT_SYMBOL(Dot11d_Init);
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/* Reset to the state as we are just entering a regulatory domain. */
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void Dot11d_Reset(struct ieee80211_device *ieee)
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{
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u32 i;
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PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(ieee);
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/* Clear old channel map */
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memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
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memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
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/* Set new channel map */
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for (i = 1; i <= 11; i++)
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(pDot11dInfo->channel_map)[i] = 1;
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for (i = 12; i <= 14; i++)
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(pDot11dInfo->channel_map)[i] = 2;
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pDot11dInfo->State = DOT11D_STATE_NONE;
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pDot11dInfo->CountryIeLen = 0;
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RESET_CIE_WATCHDOG(ieee);
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}
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EXPORT_SYMBOL(Dot11d_Reset);
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/*
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* Update country IE from Beacon or Probe Resopnse and configure PHY for
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* operation in the regulatory domain.
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*
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* TODO: Configure Tx power.
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* Assumption:
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* 1. IS_DOT11D_ENABLE() is TRUE.
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* 2. Input IE is an valid one.
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*/
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void Dot11d_UpdateCountryIe(struct ieee80211_device *dev, u8 *pTaddr,
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u16 CoutryIeLen, u8 *pCoutryIe)
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{
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PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
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u8 i, j, NumTriples, MaxChnlNum;
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PCHNL_TXPOWER_TRIPLE pTriple;
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memset(pDot11dInfo->channel_map, 0, MAX_CHANNEL_NUMBER+1);
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memset(pDot11dInfo->MaxTxPwrDbmList, 0xFF, MAX_CHANNEL_NUMBER+1);
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MaxChnlNum = 0;
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NumTriples = (CoutryIeLen - 3) / 3; /* skip 3-byte country string. */
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pTriple = (PCHNL_TXPOWER_TRIPLE)(pCoutryIe + 3);
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for (i = 0; i < NumTriples; i++) {
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if (MaxChnlNum >= pTriple->FirstChnl) {
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/* It is not in a monotonically increasing order, so
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* stop processing.
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*/
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netdev_err(dev->dev, "Dot11d_UpdateCountryIe(): Invalid country IE, skip it........1\n");
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return;
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}
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if (MAX_CHANNEL_NUMBER < (pTriple->FirstChnl + pTriple->NumChnls)) {
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/* It is not a valid set of channel id, so stop
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* processing.
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*/
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netdev_err(dev->dev, "Dot11d_UpdateCountryIe(): Invalid country IE, skip it........2\n");
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return;
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}
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for (j = 0; j < pTriple->NumChnls; j++) {
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pDot11dInfo->channel_map[pTriple->FirstChnl + j] = 1;
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pDot11dInfo->MaxTxPwrDbmList[pTriple->FirstChnl + j] = pTriple->MaxTxPowerInDbm;
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MaxChnlNum = pTriple->FirstChnl + j;
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}
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pTriple = (PCHNL_TXPOWER_TRIPLE)((u8 *)pTriple + 3);
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}
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netdev_info(dev->dev, "Channel List:");
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for (i = 1; i <= MAX_CHANNEL_NUMBER; i++)
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if (pDot11dInfo->channel_map[i] > 0)
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netdev_info(dev->dev, " %d", i);
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netdev_info(dev->dev, "\n");
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UPDATE_CIE_SRC(dev, pTaddr);
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pDot11dInfo->CountryIeLen = CoutryIeLen;
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memcpy(pDot11dInfo->CountryIeBuf, pCoutryIe, CoutryIeLen);
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pDot11dInfo->State = DOT11D_STATE_LEARNED;
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}
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EXPORT_SYMBOL(Dot11d_UpdateCountryIe);
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u8 DOT11D_GetMaxTxPwrInDbm(struct ieee80211_device *dev, u8 Channel)
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{
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PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
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u8 MaxTxPwrInDbm = 255;
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if (Channel > MAX_CHANNEL_NUMBER) {
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netdev_err(dev->dev, "DOT11D_GetMaxTxPwrInDbm(): Invalid Channel\n");
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return MaxTxPwrInDbm;
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}
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if (pDot11dInfo->channel_map[Channel])
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MaxTxPwrInDbm = pDot11dInfo->MaxTxPwrDbmList[Channel];
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return MaxTxPwrInDbm;
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}
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EXPORT_SYMBOL(DOT11D_GetMaxTxPwrInDbm);
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void DOT11D_ScanComplete(struct ieee80211_device *dev)
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{
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PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
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switch (pDot11dInfo->State) {
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case DOT11D_STATE_LEARNED:
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pDot11dInfo->State = DOT11D_STATE_DONE;
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break;
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case DOT11D_STATE_DONE:
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if (GET_CIE_WATCHDOG(dev) == 0) {
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/* Reset country IE if previous one is gone. */
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Dot11d_Reset(dev);
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}
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break;
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case DOT11D_STATE_NONE:
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break;
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}
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}
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EXPORT_SYMBOL(DOT11D_ScanComplete);
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int IsLegalChannel(struct ieee80211_device *dev, u8 channel)
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{
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PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
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if (channel > MAX_CHANNEL_NUMBER) {
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netdev_err(dev->dev, "IsLegalChannel(): Invalid Channel\n");
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return 0;
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}
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if (pDot11dInfo->channel_map[channel] > 0)
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return 1;
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return 0;
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}
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EXPORT_SYMBOL(IsLegalChannel);
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int ToLegalChannel(struct ieee80211_device *dev, u8 channel)
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{
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PRT_DOT11D_INFO pDot11dInfo = GET_DOT11D_INFO(dev);
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u8 default_chn = 0;
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u32 i = 0;
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for (i = 1; i <= MAX_CHANNEL_NUMBER; i++) {
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if (pDot11dInfo->channel_map[i] > 0) {
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default_chn = i;
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break;
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}
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}
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if (channel > MAX_CHANNEL_NUMBER) {
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netdev_err(dev->dev, "IsLegalChannel(): Invalid Channel\n");
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return default_chn;
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}
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if (pDot11dInfo->channel_map[channel] > 0)
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return channel;
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return default_chn;
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}
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EXPORT_SYMBOL(ToLegalChannel);
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