1199 lines
36 KiB
C
1199 lines
36 KiB
C
/**
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* Functions implementing wlan scan IOCTL and firmware command APIs
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*
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* IOCTL handlers as well as command preperation and response routines
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* for sending scan commands to the firmware.
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*/
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#include <linux/etherdevice.h>
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#include <asm/unaligned.h>
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#include "host.h"
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#include "decl.h"
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#include "dev.h"
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#include "scan.h"
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#include "cmd.h"
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//! Approximate amount of data needed to pass a scan result back to iwlist
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#define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
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+ IW_ESSID_MAX_SIZE \
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+ IW_EV_UINT_LEN \
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+ IW_EV_FREQ_LEN \
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+ IW_EV_QUAL_LEN \
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+ IW_ESSID_MAX_SIZE \
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+ IW_EV_PARAM_LEN \
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+ 40) /* 40 for WPAIE */
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//! Memory needed to store a max sized channel List TLV for a firmware scan
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#define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
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+ (MRVDRV_MAX_CHANNELS_PER_SCAN \
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* sizeof(struct chanscanparamset)))
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//! Memory needed to store a max number/size SSID TLV for a firmware scan
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#define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
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//! Maximum memory needed for a cmd_ds_802_11_scan with all TLVs at max
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#define MAX_SCAN_CFG_ALLOC (sizeof(struct cmd_ds_802_11_scan) \
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+ CHAN_TLV_MAX_SIZE + SSID_TLV_MAX_SIZE)
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//! The maximum number of channels the firmware can scan per command
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#define MRVDRV_MAX_CHANNELS_PER_SCAN 14
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/**
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* @brief Number of channels to scan per firmware scan command issuance.
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*
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* Number restricted to prevent hitting the limit on the amount of scan data
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* returned in a single firmware scan command.
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*/
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#define MRVDRV_CHANNELS_PER_SCAN_CMD 4
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//! Scan time specified in the channel TLV for each channel for passive scans
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#define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
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//! Scan time specified in the channel TLV for each channel for active scans
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#define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
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static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy,
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struct cmd_header *resp);
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/*********************************************************************/
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/* */
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/* Misc helper functions */
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/* */
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/*********************************************************************/
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/**
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* @brief Unsets the MSB on basic rates
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*
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* Scan through an array and unset the MSB for basic data rates.
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*
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* @param rates buffer of data rates
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* @param len size of buffer
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*/
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static void lbs_unset_basic_rate_flags(u8 *rates, size_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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rates[i] &= 0x7f;
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}
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static inline void clear_bss_descriptor(struct bss_descriptor *bss)
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{
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/* Don't blow away ->list, just BSS data */
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memset(bss, 0, offsetof(struct bss_descriptor, list));
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}
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/**
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* @brief Compare two SSIDs
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*
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* @param ssid1 A pointer to ssid to compare
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* @param ssid2 A pointer to ssid to compare
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*
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* @return 0: ssid is same, otherwise is different
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*/
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int lbs_ssid_cmp(uint8_t *ssid1, uint8_t ssid1_len, uint8_t *ssid2,
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uint8_t ssid2_len)
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{
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if (ssid1_len != ssid2_len)
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return -1;
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return memcmp(ssid1, ssid2, ssid1_len);
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}
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static inline int is_same_network(struct bss_descriptor *src,
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struct bss_descriptor *dst)
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{
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/* A network is only a duplicate if the channel, BSSID, and ESSID
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* all match. We treat all <hidden> with the same BSSID and channel
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* as one network */
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return ((src->ssid_len == dst->ssid_len) &&
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(src->channel == dst->channel) &&
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!compare_ether_addr(src->bssid, dst->bssid) &&
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!memcmp(src->ssid, dst->ssid, src->ssid_len));
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}
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/*********************************************************************/
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/* */
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/* Main scanning support */
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/* */
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/*********************************************************************/
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/**
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* @brief Create a channel list for the driver to scan based on region info
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*
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* Only used from lbs_scan_setup_scan_config()
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*
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* Use the driver region/band information to construct a comprehensive list
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* of channels to scan. This routine is used for any scan that is not
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* provided a specific channel list to scan.
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*
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* @param priv A pointer to struct lbs_private structure
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* @param scanchanlist Output parameter: resulting channel list to scan
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*
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* @return void
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*/
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static int lbs_scan_create_channel_list(struct lbs_private *priv,
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struct chanscanparamset *scanchanlist)
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{
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struct region_channel *scanregion;
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struct chan_freq_power *cfp;
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int rgnidx;
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int chanidx;
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int nextchan;
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uint8_t scantype;
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chanidx = 0;
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/* Set the default scan type to the user specified type, will later
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* be changed to passive on a per channel basis if restricted by
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* regulatory requirements (11d or 11h)
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*/
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scantype = CMD_SCAN_TYPE_ACTIVE;
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for (rgnidx = 0; rgnidx < ARRAY_SIZE(priv->region_channel); rgnidx++) {
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if (priv->enable11d && (priv->connect_status != LBS_CONNECTED)
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&& (priv->mesh_connect_status != LBS_CONNECTED)) {
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/* Scan all the supported chan for the first scan */
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if (!priv->universal_channel[rgnidx].valid)
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continue;
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scanregion = &priv->universal_channel[rgnidx];
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/* clear the parsed_region_chan for the first scan */
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memset(&priv->parsed_region_chan, 0x00,
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sizeof(priv->parsed_region_chan));
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} else {
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if (!priv->region_channel[rgnidx].valid)
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continue;
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scanregion = &priv->region_channel[rgnidx];
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}
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for (nextchan = 0; nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
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struct chanscanparamset *chan = &scanchanlist[chanidx];
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cfp = scanregion->CFP + nextchan;
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if (priv->enable11d)
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scantype = lbs_get_scan_type_11d(cfp->channel,
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&priv->parsed_region_chan);
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if (scanregion->band == BAND_B || scanregion->band == BAND_G)
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chan->radiotype = CMD_SCAN_RADIO_TYPE_BG;
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if (scantype == CMD_SCAN_TYPE_PASSIVE) {
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chan->maxscantime = cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME);
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chan->chanscanmode.passivescan = 1;
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} else {
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chan->maxscantime = cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME);
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chan->chanscanmode.passivescan = 0;
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}
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chan->channumber = cfp->channel;
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}
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}
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return chanidx;
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}
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/*
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* Add SSID TLV of the form:
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*
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* TLV-ID SSID 00 00
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* length 06 00
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* ssid 4d 4e 54 45 53 54
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*/
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static int lbs_scan_add_ssid_tlv(struct lbs_private *priv, u8 *tlv)
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{
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struct mrvlietypes_ssidparamset *ssid_tlv = (void *)tlv;
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ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
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ssid_tlv->header.len = cpu_to_le16(priv->scan_ssid_len);
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memcpy(ssid_tlv->ssid, priv->scan_ssid, priv->scan_ssid_len);
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return sizeof(ssid_tlv->header) + priv->scan_ssid_len;
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}
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/*
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* Add CHANLIST TLV of the form
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*
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* TLV-ID CHANLIST 01 01
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* length 5b 00
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* channel 1 00 01 00 00 00 64 00
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* radio type 00
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* channel 01
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* scan type 00
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* min scan time 00 00
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* max scan time 64 00
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* channel 2 00 02 00 00 00 64 00
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* channel 3 00 03 00 00 00 64 00
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* channel 4 00 04 00 00 00 64 00
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* channel 5 00 05 00 00 00 64 00
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* channel 6 00 06 00 00 00 64 00
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* channel 7 00 07 00 00 00 64 00
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* channel 8 00 08 00 00 00 64 00
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* channel 9 00 09 00 00 00 64 00
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* channel 10 00 0a 00 00 00 64 00
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* channel 11 00 0b 00 00 00 64 00
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* channel 12 00 0c 00 00 00 64 00
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* channel 13 00 0d 00 00 00 64 00
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*
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*/
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static int lbs_scan_add_chanlist_tlv(uint8_t *tlv,
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struct chanscanparamset *chan_list,
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int chan_count)
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{
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size_t size = sizeof(struct chanscanparamset) *chan_count;
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struct mrvlietypes_chanlistparamset *chan_tlv = (void *)tlv;
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chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
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memcpy(chan_tlv->chanscanparam, chan_list, size);
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chan_tlv->header.len = cpu_to_le16(size);
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return sizeof(chan_tlv->header) + size;
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}
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/*
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* Add RATES TLV of the form
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*
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* TLV-ID RATES 01 00
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* length 0e 00
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* rates 82 84 8b 96 0c 12 18 24 30 48 60 6c
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*
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* The rates are in lbs_bg_rates[], but for the 802.11b
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* rates the high bit isn't set.
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*/
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static int lbs_scan_add_rates_tlv(uint8_t *tlv)
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{
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int i;
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struct mrvlietypes_ratesparamset *rate_tlv = (void *)tlv;
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rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES);
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tlv += sizeof(rate_tlv->header);
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for (i = 0; i < MAX_RATES; i++) {
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*tlv = lbs_bg_rates[i];
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if (*tlv == 0)
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break;
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/* This code makes sure that the 802.11b rates (1 MBit/s, 2
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MBit/s, 5.5 MBit/s and 11 MBit/s get's the high bit set.
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Note that the values are MBit/s * 2, to mark them as
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basic rates so that the firmware likes it better */
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if (*tlv == 0x02 || *tlv == 0x04 ||
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*tlv == 0x0b || *tlv == 0x16)
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*tlv |= 0x80;
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tlv++;
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}
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rate_tlv->header.len = cpu_to_le16(i);
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return sizeof(rate_tlv->header) + i;
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}
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/*
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* Generate the CMD_802_11_SCAN command with the proper tlv
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* for a bunch of channels.
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*/
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static int lbs_do_scan(struct lbs_private *priv, uint8_t bsstype,
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struct chanscanparamset *chan_list, int chan_count)
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{
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int ret = -ENOMEM;
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struct cmd_ds_802_11_scan *scan_cmd;
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uint8_t *tlv; /* pointer into our current, growing TLV storage area */
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lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, chan_count %d",
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bsstype, chan_list ? chan_list[0].channumber : -1,
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chan_count);
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/* create the fixed part for scan command */
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scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
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if (scan_cmd == NULL)
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goto out;
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tlv = scan_cmd->tlvbuffer;
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/* TODO: do we need to scan for a specific BSSID?
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memcpy(scan_cmd->bssid, priv->scan_bssid, ETH_ALEN); */
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scan_cmd->bsstype = bsstype;
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/* add TLVs */
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if (priv->scan_ssid_len)
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tlv += lbs_scan_add_ssid_tlv(priv, tlv);
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if (chan_list && chan_count)
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tlv += lbs_scan_add_chanlist_tlv(tlv, chan_list, chan_count);
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tlv += lbs_scan_add_rates_tlv(tlv);
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/* This is the final data we are about to send */
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scan_cmd->hdr.size = cpu_to_le16(tlv - (uint8_t *)scan_cmd);
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lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd,
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sizeof(*scan_cmd));
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lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer,
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tlv - scan_cmd->tlvbuffer);
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ret = __lbs_cmd(priv, CMD_802_11_SCAN, &scan_cmd->hdr,
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le16_to_cpu(scan_cmd->hdr.size),
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lbs_ret_80211_scan, 0);
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out:
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kfree(scan_cmd);
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lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
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return ret;
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}
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/**
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* @brief Internal function used to start a scan based on an input config
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*
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* Use the input user scan configuration information when provided in
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* order to send the appropriate scan commands to firmware to populate or
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* update the internal driver scan table
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*
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* @param priv A pointer to struct lbs_private structure
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* @param full_scan Do a full-scan (blocking)
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*
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* @return 0 or < 0 if error
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*/
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int lbs_scan_networks(struct lbs_private *priv, int full_scan)
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{
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int ret = -ENOMEM;
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struct chanscanparamset *chan_list;
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struct chanscanparamset *curr_chans;
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int chan_count;
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uint8_t bsstype = CMD_BSS_TYPE_ANY;
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int numchannels = MRVDRV_CHANNELS_PER_SCAN_CMD;
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union iwreq_data wrqu;
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#ifdef CONFIG_LIBERTAS_DEBUG
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struct bss_descriptor *iter;
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int i = 0;
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DECLARE_MAC_BUF(mac);
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#endif
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lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", full_scan);
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/* Cancel any partial outstanding partial scans if this scan
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* is a full scan.
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*/
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if (full_scan && delayed_work_pending(&priv->scan_work))
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cancel_delayed_work(&priv->scan_work);
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/* User-specified bsstype or channel list
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TODO: this can be implemented if some user-space application
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need the feature. Formerly, it was accessible from debugfs,
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but then nowhere used.
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if (user_cfg) {
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if (user_cfg->bsstype)
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bsstype = user_cfg->bsstype;
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} */
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lbs_deb_scan("numchannels %d, bsstype %d\n", numchannels, bsstype);
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/* Create list of channels to scan */
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chan_list = kzalloc(sizeof(struct chanscanparamset) *
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LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
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if (!chan_list) {
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lbs_pr_alert("SCAN: chan_list empty\n");
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goto out;
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}
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/* We want to scan all channels */
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chan_count = lbs_scan_create_channel_list(priv, chan_list);
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netif_stop_queue(priv->dev);
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netif_carrier_off(priv->dev);
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if (priv->mesh_dev) {
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netif_stop_queue(priv->mesh_dev);
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netif_carrier_off(priv->mesh_dev);
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}
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/* Prepare to continue an interrupted scan */
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lbs_deb_scan("chan_count %d, scan_channel %d\n",
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chan_count, priv->scan_channel);
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curr_chans = chan_list;
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/* advance channel list by already-scanned-channels */
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if (priv->scan_channel > 0) {
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curr_chans += priv->scan_channel;
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chan_count -= priv->scan_channel;
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}
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|
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/* Send scan command(s)
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* numchannels contains the number of channels we should maximally scan
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* chan_count is the total number of channels to scan
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*/
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while (chan_count) {
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int to_scan = min(numchannels, chan_count);
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lbs_deb_scan("scanning %d of %d channels\n",
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to_scan, chan_count);
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ret = lbs_do_scan(priv, bsstype, curr_chans,
|
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to_scan);
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if (ret) {
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lbs_pr_err("SCAN_CMD failed\n");
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goto out2;
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}
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curr_chans += to_scan;
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chan_count -= to_scan;
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|
|
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/* somehow schedule the next part of the scan */
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if (chan_count && !full_scan &&
|
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!priv->surpriseremoved) {
|
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/* -1 marks just that we're currently scanning */
|
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if (priv->scan_channel < 0)
|
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priv->scan_channel = to_scan;
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else
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priv->scan_channel += to_scan;
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cancel_delayed_work(&priv->scan_work);
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queue_delayed_work(priv->work_thread, &priv->scan_work,
|
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msecs_to_jiffies(300));
|
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/* skip over GIWSCAN event */
|
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goto out;
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}
|
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|
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}
|
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memset(&wrqu, 0, sizeof(union iwreq_data));
|
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wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
|
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|
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#ifdef CONFIG_LIBERTAS_DEBUG
|
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/* Dump the scan table */
|
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mutex_lock(&priv->lock);
|
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lbs_deb_scan("scan table:\n");
|
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list_for_each_entry(iter, &priv->network_list, list)
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lbs_deb_scan("%02d: BSSID %s, RSSI %d, SSID '%s'\n",
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i++, print_mac(mac, iter->bssid), iter->rssi,
|
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escape_essid(iter->ssid, iter->ssid_len));
|
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mutex_unlock(&priv->lock);
|
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#endif
|
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|
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out2:
|
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priv->scan_channel = 0;
|
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|
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out:
|
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if (priv->connect_status == LBS_CONNECTED) {
|
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netif_carrier_on(priv->dev);
|
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if (!priv->tx_pending_len)
|
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netif_wake_queue(priv->dev);
|
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}
|
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if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) {
|
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netif_carrier_on(priv->mesh_dev);
|
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if (!priv->tx_pending_len)
|
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netif_wake_queue(priv->mesh_dev);
|
|
}
|
|
kfree(chan_list);
|
|
|
|
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
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void lbs_scan_worker(struct work_struct *work)
|
|
{
|
|
struct lbs_private *priv =
|
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container_of(work, struct lbs_private, scan_work.work);
|
|
|
|
lbs_deb_enter(LBS_DEB_SCAN);
|
|
lbs_scan_networks(priv, 0);
|
|
lbs_deb_leave(LBS_DEB_SCAN);
|
|
}
|
|
|
|
|
|
/*********************************************************************/
|
|
/* */
|
|
/* Result interpretation */
|
|
/* */
|
|
/*********************************************************************/
|
|
|
|
/**
|
|
* @brief Interpret a BSS scan response returned from the firmware
|
|
*
|
|
* Parse the various fixed fields and IEs passed back for a a BSS probe
|
|
* response or beacon from the scan command. Record information as needed
|
|
* in the scan table struct bss_descriptor for that entry.
|
|
*
|
|
* @param bss Output parameter: Pointer to the BSS Entry
|
|
*
|
|
* @return 0 or -1
|
|
*/
|
|
static int lbs_process_bss(struct bss_descriptor *bss,
|
|
uint8_t **pbeaconinfo, int *bytesleft)
|
|
{
|
|
struct ieeetypes_fhparamset *pFH;
|
|
struct ieeetypes_dsparamset *pDS;
|
|
struct ieeetypes_cfparamset *pCF;
|
|
struct ieeetypes_ibssparamset *pibss;
|
|
DECLARE_MAC_BUF(mac);
|
|
struct ieeetypes_countryinfoset *pcountryinfo;
|
|
uint8_t *pos, *end, *p;
|
|
uint8_t n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0;
|
|
uint16_t beaconsize = 0;
|
|
int ret;
|
|
|
|
lbs_deb_enter(LBS_DEB_SCAN);
|
|
|
|
if (*bytesleft >= sizeof(beaconsize)) {
|
|
/* Extract & convert beacon size from the command buffer */
|
|
beaconsize = get_unaligned_le16(*pbeaconinfo);
|
|
*bytesleft -= sizeof(beaconsize);
|
|
*pbeaconinfo += sizeof(beaconsize);
|
|
}
|
|
|
|
if (beaconsize == 0 || beaconsize > *bytesleft) {
|
|
*pbeaconinfo += *bytesleft;
|
|
*bytesleft = 0;
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
|
|
/* Initialize the current working beacon pointer for this BSS iteration */
|
|
pos = *pbeaconinfo;
|
|
end = pos + beaconsize;
|
|
|
|
/* Advance the return beacon pointer past the current beacon */
|
|
*pbeaconinfo += beaconsize;
|
|
*bytesleft -= beaconsize;
|
|
|
|
memcpy(bss->bssid, pos, ETH_ALEN);
|
|
lbs_deb_scan("process_bss: BSSID %s\n", print_mac(mac, bss->bssid));
|
|
pos += ETH_ALEN;
|
|
|
|
if ((end - pos) < 12) {
|
|
lbs_deb_scan("process_bss: Not enough bytes left\n");
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* next 4 fields are RSSI, time stamp, beacon interval,
|
|
* and capability information
|
|
*/
|
|
|
|
/* RSSI is 1 byte long */
|
|
bss->rssi = *pos;
|
|
lbs_deb_scan("process_bss: RSSI %d\n", *pos);
|
|
pos++;
|
|
|
|
/* time stamp is 8 bytes long */
|
|
pos += 8;
|
|
|
|
/* beacon interval is 2 bytes long */
|
|
bss->beaconperiod = get_unaligned_le16(pos);
|
|
pos += 2;
|
|
|
|
/* capability information is 2 bytes long */
|
|
bss->capability = get_unaligned_le16(pos);
|
|
lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability);
|
|
pos += 2;
|
|
|
|
if (bss->capability & WLAN_CAPABILITY_PRIVACY)
|
|
lbs_deb_scan("process_bss: WEP enabled\n");
|
|
if (bss->capability & WLAN_CAPABILITY_IBSS)
|
|
bss->mode = IW_MODE_ADHOC;
|
|
else
|
|
bss->mode = IW_MODE_INFRA;
|
|
|
|
/* rest of the current buffer are IE's */
|
|
lbs_deb_scan("process_bss: IE len %zd\n", end - pos);
|
|
lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos);
|
|
|
|
/* process variable IE */
|
|
while (pos <= end - 2) {
|
|
struct ieee80211_info_element * elem = (void *)pos;
|
|
|
|
if (pos + elem->len > end) {
|
|
lbs_deb_scan("process_bss: error in processing IE, "
|
|
"bytes left < IE length\n");
|
|
break;
|
|
}
|
|
|
|
switch (elem->id) {
|
|
case MFIE_TYPE_SSID:
|
|
bss->ssid_len = elem->len;
|
|
memcpy(bss->ssid, elem->data, elem->len);
|
|
lbs_deb_scan("got SSID IE: '%s', len %u\n",
|
|
escape_essid(bss->ssid, bss->ssid_len),
|
|
bss->ssid_len);
|
|
break;
|
|
|
|
case MFIE_TYPE_RATES:
|
|
n_basic_rates = min_t(uint8_t, MAX_RATES, elem->len);
|
|
memcpy(bss->rates, elem->data, n_basic_rates);
|
|
got_basic_rates = 1;
|
|
lbs_deb_scan("got RATES IE\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_FH_SET:
|
|
pFH = (struct ieeetypes_fhparamset *) pos;
|
|
memmove(&bss->phyparamset.fhparamset, pFH,
|
|
sizeof(struct ieeetypes_fhparamset));
|
|
lbs_deb_scan("got FH IE\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_DS_SET:
|
|
pDS = (struct ieeetypes_dsparamset *) pos;
|
|
bss->channel = pDS->currentchan;
|
|
memcpy(&bss->phyparamset.dsparamset, pDS,
|
|
sizeof(struct ieeetypes_dsparamset));
|
|
lbs_deb_scan("got DS IE, channel %d\n", bss->channel);
|
|
break;
|
|
|
|
case MFIE_TYPE_CF_SET:
|
|
pCF = (struct ieeetypes_cfparamset *) pos;
|
|
memcpy(&bss->ssparamset.cfparamset, pCF,
|
|
sizeof(struct ieeetypes_cfparamset));
|
|
lbs_deb_scan("got CF IE\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_IBSS_SET:
|
|
pibss = (struct ieeetypes_ibssparamset *) pos;
|
|
bss->atimwindow = le16_to_cpu(pibss->atimwindow);
|
|
memmove(&bss->ssparamset.ibssparamset, pibss,
|
|
sizeof(struct ieeetypes_ibssparamset));
|
|
lbs_deb_scan("got IBSS IE\n");
|
|
break;
|
|
|
|
case MFIE_TYPE_COUNTRY:
|
|
pcountryinfo = (struct ieeetypes_countryinfoset *) pos;
|
|
lbs_deb_scan("got COUNTRY IE\n");
|
|
if (pcountryinfo->len < sizeof(pcountryinfo->countrycode)
|
|
|| pcountryinfo->len > 254) {
|
|
lbs_deb_scan("process_bss: 11D- Err CountryInfo len %d, min %zd, max 254\n",
|
|
pcountryinfo->len, sizeof(pcountryinfo->countrycode));
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
|
|
memcpy(&bss->countryinfo, pcountryinfo, pcountryinfo->len + 2);
|
|
lbs_deb_hex(LBS_DEB_SCAN, "process_bss: 11d countryinfo",
|
|
(uint8_t *) pcountryinfo,
|
|
(int) (pcountryinfo->len + 2));
|
|
break;
|
|
|
|
case MFIE_TYPE_RATES_EX:
|
|
/* only process extended supported rate if data rate is
|
|
* already found. Data rate IE should come before
|
|
* extended supported rate IE
|
|
*/
|
|
lbs_deb_scan("got RATESEX IE\n");
|
|
if (!got_basic_rates) {
|
|
lbs_deb_scan("... but ignoring it\n");
|
|
break;
|
|
}
|
|
|
|
n_ex_rates = elem->len;
|
|
if (n_basic_rates + n_ex_rates > MAX_RATES)
|
|
n_ex_rates = MAX_RATES - n_basic_rates;
|
|
|
|
p = bss->rates + n_basic_rates;
|
|
memcpy(p, elem->data, n_ex_rates);
|
|
break;
|
|
|
|
case MFIE_TYPE_GENERIC:
|
|
if (elem->len >= 4 &&
|
|
elem->data[0] == 0x00 && elem->data[1] == 0x50 &&
|
|
elem->data[2] == 0xf2 && elem->data[3] == 0x01) {
|
|
bss->wpa_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN);
|
|
memcpy(bss->wpa_ie, elem, bss->wpa_ie_len);
|
|
lbs_deb_scan("got WPA IE\n");
|
|
lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie, elem->len);
|
|
} else if (elem->len >= MARVELL_MESH_IE_LENGTH &&
|
|
elem->data[0] == 0x00 && elem->data[1] == 0x50 &&
|
|
elem->data[2] == 0x43 && elem->data[3] == 0x04) {
|
|
lbs_deb_scan("got mesh IE\n");
|
|
bss->mesh = 1;
|
|
} else {
|
|
lbs_deb_scan("got generic IE: %02x:%02x:%02x:%02x, len %d\n",
|
|
elem->data[0], elem->data[1],
|
|
elem->data[2], elem->data[3],
|
|
elem->len);
|
|
}
|
|
break;
|
|
|
|
case MFIE_TYPE_RSN:
|
|
lbs_deb_scan("got RSN IE\n");
|
|
bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN);
|
|
memcpy(bss->rsn_ie, elem, bss->rsn_ie_len);
|
|
lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE",
|
|
bss->rsn_ie, elem->len);
|
|
break;
|
|
|
|
default:
|
|
lbs_deb_scan("got IE 0x%04x, len %d\n",
|
|
elem->id, elem->len);
|
|
break;
|
|
}
|
|
|
|
pos += elem->len + 2;
|
|
}
|
|
|
|
/* Timestamp */
|
|
bss->last_scanned = jiffies;
|
|
lbs_unset_basic_rate_flags(bss->rates, sizeof(bss->rates));
|
|
|
|
ret = 0;
|
|
|
|
done:
|
|
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief Send a scan command for all available channels filtered on a spec
|
|
*
|
|
* Used in association code and from debugfs
|
|
*
|
|
* @param priv A pointer to struct lbs_private structure
|
|
* @param ssid A pointer to the SSID to scan for
|
|
* @param ssid_len Length of the SSID
|
|
*
|
|
* @return 0-success, otherwise fail
|
|
*/
|
|
int lbs_send_specific_ssid_scan(struct lbs_private *priv, uint8_t *ssid,
|
|
uint8_t ssid_len)
|
|
{
|
|
int ret = 0;
|
|
|
|
lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s'\n",
|
|
escape_essid(ssid, ssid_len));
|
|
|
|
if (!ssid_len)
|
|
goto out;
|
|
|
|
memcpy(priv->scan_ssid, ssid, ssid_len);
|
|
priv->scan_ssid_len = ssid_len;
|
|
|
|
lbs_scan_networks(priv, 1);
|
|
if (priv->surpriseremoved) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*********************************************************************/
|
|
/* */
|
|
/* Support for Wireless Extensions */
|
|
/* */
|
|
/*********************************************************************/
|
|
|
|
|
|
#define MAX_CUSTOM_LEN 64
|
|
|
|
static inline char *lbs_translate_scan(struct lbs_private *priv,
|
|
struct iw_request_info *info,
|
|
char *start, char *stop,
|
|
struct bss_descriptor *bss)
|
|
{
|
|
struct chan_freq_power *cfp;
|
|
char *current_val; /* For rates */
|
|
struct iw_event iwe; /* Temporary buffer */
|
|
int j;
|
|
#define PERFECT_RSSI ((uint8_t)50)
|
|
#define WORST_RSSI ((uint8_t)0)
|
|
#define RSSI_DIFF ((uint8_t)(PERFECT_RSSI - WORST_RSSI))
|
|
uint8_t rssi;
|
|
|
|
lbs_deb_enter(LBS_DEB_SCAN);
|
|
|
|
cfp = lbs_find_cfp_by_band_and_channel(priv, 0, bss->channel);
|
|
if (!cfp) {
|
|
lbs_deb_scan("Invalid channel number %d\n", bss->channel);
|
|
start = NULL;
|
|
goto out;
|
|
}
|
|
|
|
/* First entry *MUST* be the BSSID */
|
|
iwe.cmd = SIOCGIWAP;
|
|
iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
|
|
memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN);
|
|
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN);
|
|
|
|
/* SSID */
|
|
iwe.cmd = SIOCGIWESSID;
|
|
iwe.u.data.flags = 1;
|
|
iwe.u.data.length = min((uint32_t) bss->ssid_len, (uint32_t) IW_ESSID_MAX_SIZE);
|
|
start = iwe_stream_add_point(info, start, stop, &iwe, bss->ssid);
|
|
|
|
/* Mode */
|
|
iwe.cmd = SIOCGIWMODE;
|
|
iwe.u.mode = bss->mode;
|
|
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_UINT_LEN);
|
|
|
|
/* Frequency */
|
|
iwe.cmd = SIOCGIWFREQ;
|
|
iwe.u.freq.m = (long)cfp->freq * 100000;
|
|
iwe.u.freq.e = 1;
|
|
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_FREQ_LEN);
|
|
|
|
/* Add quality statistics */
|
|
iwe.cmd = IWEVQUAL;
|
|
iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
|
|
iwe.u.qual.level = SCAN_RSSI(bss->rssi);
|
|
|
|
rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
|
|
iwe.u.qual.qual =
|
|
(100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
|
|
(15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
|
|
(RSSI_DIFF * RSSI_DIFF);
|
|
if (iwe.u.qual.qual > 100)
|
|
iwe.u.qual.qual = 100;
|
|
|
|
if (priv->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
|
|
iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
|
|
} else {
|
|
iwe.u.qual.noise = CAL_NF(priv->NF[TYPE_BEACON][TYPE_NOAVG]);
|
|
}
|
|
|
|
/* Locally created ad-hoc BSSs won't have beacons if this is the
|
|
* only station in the adhoc network; so get signal strength
|
|
* from receive statistics.
|
|
*/
|
|
if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate
|
|
&& !lbs_ssid_cmp(priv->curbssparams.ssid,
|
|
priv->curbssparams.ssid_len,
|
|
bss->ssid, bss->ssid_len)) {
|
|
int snr, nf;
|
|
snr = priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
|
|
nf = priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
|
|
iwe.u.qual.level = CAL_RSSI(snr, nf);
|
|
}
|
|
start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_QUAL_LEN);
|
|
|
|
/* Add encryption capability */
|
|
iwe.cmd = SIOCGIWENCODE;
|
|
if (bss->capability & WLAN_CAPABILITY_PRIVACY) {
|
|
iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
|
|
} else {
|
|
iwe.u.data.flags = IW_ENCODE_DISABLED;
|
|
}
|
|
iwe.u.data.length = 0;
|
|
start = iwe_stream_add_point(info, start, stop, &iwe, bss->ssid);
|
|
|
|
current_val = start + iwe_stream_lcp_len(info);
|
|
|
|
iwe.cmd = SIOCGIWRATE;
|
|
iwe.u.bitrate.fixed = 0;
|
|
iwe.u.bitrate.disabled = 0;
|
|
iwe.u.bitrate.value = 0;
|
|
|
|
for (j = 0; bss->rates[j] && (j < sizeof(bss->rates)); j++) {
|
|
/* Bit rate given in 500 kb/s units */
|
|
iwe.u.bitrate.value = bss->rates[j] * 500000;
|
|
current_val = iwe_stream_add_value(info, start, current_val,
|
|
stop, &iwe, IW_EV_PARAM_LEN);
|
|
}
|
|
if ((bss->mode == IW_MODE_ADHOC) && priv->adhoccreate
|
|
&& !lbs_ssid_cmp(priv->curbssparams.ssid,
|
|
priv->curbssparams.ssid_len,
|
|
bss->ssid, bss->ssid_len)) {
|
|
iwe.u.bitrate.value = 22 * 500000;
|
|
current_val = iwe_stream_add_value(info, start, current_val,
|
|
stop, &iwe, IW_EV_PARAM_LEN);
|
|
}
|
|
/* Check if we added any event */
|
|
if ((current_val - start) > iwe_stream_lcp_len(info))
|
|
start = current_val;
|
|
|
|
memset(&iwe, 0, sizeof(iwe));
|
|
if (bss->wpa_ie_len) {
|
|
char buf[MAX_WPA_IE_LEN];
|
|
memcpy(buf, bss->wpa_ie, bss->wpa_ie_len);
|
|
iwe.cmd = IWEVGENIE;
|
|
iwe.u.data.length = bss->wpa_ie_len;
|
|
start = iwe_stream_add_point(info, start, stop, &iwe, buf);
|
|
}
|
|
|
|
memset(&iwe, 0, sizeof(iwe));
|
|
if (bss->rsn_ie_len) {
|
|
char buf[MAX_WPA_IE_LEN];
|
|
memcpy(buf, bss->rsn_ie, bss->rsn_ie_len);
|
|
iwe.cmd = IWEVGENIE;
|
|
iwe.u.data.length = bss->rsn_ie_len;
|
|
start = iwe_stream_add_point(info, start, stop, &iwe, buf);
|
|
}
|
|
|
|
if (bss->mesh) {
|
|
char custom[MAX_CUSTOM_LEN];
|
|
char *p = custom;
|
|
|
|
iwe.cmd = IWEVCUSTOM;
|
|
p += snprintf(p, MAX_CUSTOM_LEN, "mesh-type: olpc");
|
|
iwe.u.data.length = p - custom;
|
|
if (iwe.u.data.length)
|
|
start = iwe_stream_add_point(info, start, stop,
|
|
&iwe, custom);
|
|
}
|
|
|
|
out:
|
|
lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start);
|
|
return start;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Handle Scan Network ioctl
|
|
*
|
|
* @param dev A pointer to net_device structure
|
|
* @param info A pointer to iw_request_info structure
|
|
* @param vwrq A pointer to iw_param structure
|
|
* @param extra A pointer to extra data buf
|
|
*
|
|
* @return 0 --success, otherwise fail
|
|
*/
|
|
int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
|
|
union iwreq_data *wrqu, char *extra)
|
|
{
|
|
struct lbs_private *priv = dev->priv;
|
|
int ret = 0;
|
|
|
|
lbs_deb_enter(LBS_DEB_WEXT);
|
|
|
|
if (!netif_running(dev)) {
|
|
ret = -ENETDOWN;
|
|
goto out;
|
|
}
|
|
|
|
/* mac80211 does this:
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
if (sdata->type != IEEE80211_IF_TYPE_xxx) {
|
|
ret = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
*/
|
|
|
|
if (wrqu->data.length == sizeof(struct iw_scan_req) &&
|
|
wrqu->data.flags & IW_SCAN_THIS_ESSID) {
|
|
struct iw_scan_req *req = (struct iw_scan_req *)extra;
|
|
priv->scan_ssid_len = req->essid_len;
|
|
memcpy(priv->scan_ssid, req->essid, priv->scan_ssid_len);
|
|
lbs_deb_wext("set_scan, essid '%s'\n",
|
|
escape_essid(priv->scan_ssid, priv->scan_ssid_len));
|
|
} else {
|
|
priv->scan_ssid_len = 0;
|
|
}
|
|
|
|
if (!delayed_work_pending(&priv->scan_work))
|
|
queue_delayed_work(priv->work_thread, &priv->scan_work,
|
|
msecs_to_jiffies(50));
|
|
/* set marker that currently a scan is taking place */
|
|
priv->scan_channel = -1;
|
|
|
|
if (priv->surpriseremoved)
|
|
ret = -EIO;
|
|
|
|
out:
|
|
lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Handle Retrieve scan table ioctl
|
|
*
|
|
* @param dev A pointer to net_device structure
|
|
* @param info A pointer to iw_request_info structure
|
|
* @param dwrq A pointer to iw_point structure
|
|
* @param extra A pointer to extra data buf
|
|
*
|
|
* @return 0 --success, otherwise fail
|
|
*/
|
|
int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
|
|
struct iw_point *dwrq, char *extra)
|
|
{
|
|
#define SCAN_ITEM_SIZE 128
|
|
struct lbs_private *priv = dev->priv;
|
|
int err = 0;
|
|
char *ev = extra;
|
|
char *stop = ev + dwrq->length;
|
|
struct bss_descriptor *iter_bss;
|
|
struct bss_descriptor *safe;
|
|
|
|
lbs_deb_enter(LBS_DEB_WEXT);
|
|
|
|
/* iwlist should wait until the current scan is finished */
|
|
if (priv->scan_channel)
|
|
return -EAGAIN;
|
|
|
|
/* Update RSSI if current BSS is a locally created ad-hoc BSS */
|
|
if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate)
|
|
lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
|
|
CMD_OPTION_WAITFORRSP, 0, NULL);
|
|
|
|
mutex_lock(&priv->lock);
|
|
list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) {
|
|
char *next_ev;
|
|
unsigned long stale_time;
|
|
|
|
if (stop - ev < SCAN_ITEM_SIZE) {
|
|
err = -E2BIG;
|
|
break;
|
|
}
|
|
|
|
/* For mesh device, list only mesh networks */
|
|
if (dev == priv->mesh_dev && !iter_bss->mesh)
|
|
continue;
|
|
|
|
/* Prune old an old scan result */
|
|
stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
|
|
if (time_after(jiffies, stale_time)) {
|
|
list_move_tail(&iter_bss->list, &priv->network_free_list);
|
|
clear_bss_descriptor(iter_bss);
|
|
continue;
|
|
}
|
|
|
|
/* Translate to WE format this entry */
|
|
next_ev = lbs_translate_scan(priv, info, ev, stop, iter_bss);
|
|
if (next_ev == NULL)
|
|
continue;
|
|
ev = next_ev;
|
|
}
|
|
mutex_unlock(&priv->lock);
|
|
|
|
dwrq->length = (ev - extra);
|
|
dwrq->flags = 0;
|
|
|
|
lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", err);
|
|
return err;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*********************************************************************/
|
|
/* */
|
|
/* Command execution */
|
|
/* */
|
|
/*********************************************************************/
|
|
|
|
|
|
/**
|
|
* @brief This function handles the command response of scan
|
|
*
|
|
* Called from handle_cmd_response() in cmdrespc.
|
|
*
|
|
* The response buffer for the scan command has the following
|
|
* memory layout:
|
|
*
|
|
* .-----------------------------------------------------------.
|
|
* | header (4 * sizeof(u16)): Standard command response hdr |
|
|
* .-----------------------------------------------------------.
|
|
* | bufsize (u16) : sizeof the BSS Description data |
|
|
* .-----------------------------------------------------------.
|
|
* | NumOfSet (u8) : Number of BSS Descs returned |
|
|
* .-----------------------------------------------------------.
|
|
* | BSSDescription data (variable, size given in bufsize) |
|
|
* .-----------------------------------------------------------.
|
|
* | TLV data (variable, size calculated using header->size, |
|
|
* | bufsize and sizeof the fixed fields above) |
|
|
* .-----------------------------------------------------------.
|
|
*
|
|
* @param priv A pointer to struct lbs_private structure
|
|
* @param resp A pointer to cmd_ds_command
|
|
*
|
|
* @return 0 or -1
|
|
*/
|
|
static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy,
|
|
struct cmd_header *resp)
|
|
{
|
|
struct cmd_ds_802_11_scan_rsp *scanresp = (void *)resp;
|
|
struct bss_descriptor *iter_bss;
|
|
struct bss_descriptor *safe;
|
|
uint8_t *bssinfo;
|
|
uint16_t scanrespsize;
|
|
int bytesleft;
|
|
int idx;
|
|
int tlvbufsize;
|
|
int ret;
|
|
|
|
lbs_deb_enter(LBS_DEB_SCAN);
|
|
|
|
/* Prune old entries from scan table */
|
|
list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) {
|
|
unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
|
|
if (time_before(jiffies, stale_time))
|
|
continue;
|
|
list_move_tail (&iter_bss->list, &priv->network_free_list);
|
|
clear_bss_descriptor(iter_bss);
|
|
}
|
|
|
|
if (scanresp->nr_sets > MAX_NETWORK_COUNT) {
|
|
lbs_deb_scan("SCAN_RESP: too many scan results (%d, max %d)\n",
|
|
scanresp->nr_sets, MAX_NETWORK_COUNT);
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
|
|
bytesleft = le16_to_cpu(scanresp->bssdescriptsize);
|
|
lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft);
|
|
|
|
scanrespsize = le16_to_cpu(resp->size);
|
|
lbs_deb_scan("SCAN_RESP: scan results %d\n", scanresp->nr_sets);
|
|
|
|
bssinfo = scanresp->bssdesc_and_tlvbuffer;
|
|
|
|
/* The size of the TLV buffer is equal to the entire command response
|
|
* size (scanrespsize) minus the fixed fields (sizeof()'s), the
|
|
* BSS Descriptions (bssdescriptsize as bytesLef) and the command
|
|
* response header (S_DS_GEN)
|
|
*/
|
|
tlvbufsize = scanrespsize - (bytesleft + sizeof(scanresp->bssdescriptsize)
|
|
+ sizeof(scanresp->nr_sets)
|
|
+ S_DS_GEN);
|
|
|
|
/*
|
|
* Process each scan response returned (scanresp->nr_sets). Save
|
|
* the information in the newbssentry and then insert into the
|
|
* driver scan table either as an update to an existing entry
|
|
* or as an addition at the end of the table
|
|
*/
|
|
for (idx = 0; idx < scanresp->nr_sets && bytesleft; idx++) {
|
|
struct bss_descriptor new;
|
|
struct bss_descriptor *found = NULL;
|
|
struct bss_descriptor *oldest = NULL;
|
|
DECLARE_MAC_BUF(mac);
|
|
|
|
/* Process the data fields and IEs returned for this BSS */
|
|
memset(&new, 0, sizeof (struct bss_descriptor));
|
|
if (lbs_process_bss(&new, &bssinfo, &bytesleft) != 0) {
|
|
/* error parsing the scan response, skipped */
|
|
lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n");
|
|
continue;
|
|
}
|
|
|
|
/* Try to find this bss in the scan table */
|
|
list_for_each_entry (iter_bss, &priv->network_list, list) {
|
|
if (is_same_network(iter_bss, &new)) {
|
|
found = iter_bss;
|
|
break;
|
|
}
|
|
|
|
if ((oldest == NULL) ||
|
|
(iter_bss->last_scanned < oldest->last_scanned))
|
|
oldest = iter_bss;
|
|
}
|
|
|
|
if (found) {
|
|
/* found, clear it */
|
|
clear_bss_descriptor(found);
|
|
} else if (!list_empty(&priv->network_free_list)) {
|
|
/* Pull one from the free list */
|
|
found = list_entry(priv->network_free_list.next,
|
|
struct bss_descriptor, list);
|
|
list_move_tail(&found->list, &priv->network_list);
|
|
} else if (oldest) {
|
|
/* If there are no more slots, expire the oldest */
|
|
found = oldest;
|
|
clear_bss_descriptor(found);
|
|
list_move_tail(&found->list, &priv->network_list);
|
|
} else {
|
|
continue;
|
|
}
|
|
|
|
lbs_deb_scan("SCAN_RESP: BSSID %s\n", print_mac(mac, new.bssid));
|
|
|
|
/* Copy the locally created newbssentry to the scan table */
|
|
memcpy(found, &new, offsetof(struct bss_descriptor, list));
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
done:
|
|
lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
|
|
return ret;
|
|
}
|